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MENEZES, Bruna Biava de, Caroline Bertoline RIBEIRO, Catherine Cecília WALKER, Gleice Kelli Ayardes de MELO, Andréa Roberto Duarte Lopes SOUZA, Henrique Jorge FERNANDES, Gumercindo Loriano FRANCO, and Maria da Graça MORAIS. "Predição da composição física e química da carcaça de borregas pela seção da 9ª a 11ª costelas ou 12ª costela." Revista Brasileira de Saúde e Produção Animal 16, no. 4 (December 2015): 874–84. http://dx.doi.org/10.1590/s1519-99402015000400011.
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RESUMO Objetivou-se ajustar e avaliar modelos para predição da composição física e química corporal de borregas a partir de medidas obtidas da seção da 9ª à 11ª costelas (seção 9-11) ou da 12ª costela. Foram confinadas em baias individuais 36 borregas mestiças alimentadas com níveis crescentes de concentrado (0; 20; 40; 60 e 80%) até atingirem 37,70 ± 10,23kg para o abate. No abate, a meia-carcaça direita de cada animal foi dissecada para determinação da proporção de músculo (PMC), gordura (PGC), osso (POC), proteína bruta (PPBC) e extrato etéreo (PEEC). A seção 9-11 e a 12ª costela foram obtidas na meia-carcaça esquerda com objetivo similar. Os modelos para predição foram ajustados como possíveis variáveis preditoras a PMC, PGC, POC, PPBC e PEEC na seção 9-11 (PM9-11, PG9-11, PO9-11, PPB9-11 e PEEC9-11, respectivamente) ou na 12ª costela (PM12, PG12, PO12, PPB12 e PEE12, respectivamente). Foi observada correlação positiva entre a PM9-11 e PMC (r = 0,69; P<0,001). A PG9-11 foi correlacionada com a PGC (r = 0,93; P<0,001). A PO9-11 foi positivamente correlacionada com a POC (r = 0,92; P<0,001). A PG12 gerou modelo acurado para a predição da PGC (R2 = 0,92; P<0,001). A equação de predição para estimativa da POC a partir da PO9-11 foi mais precisa e acurada (R2= 0,86; P<0,001) em relação à PO12 (R2 = 0,55). É possível gerar modelos de predição de componentes físicos e químicos corporais de borregas a partir da seção 9-11 e 12ª costela.
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Gerecht, A. C., L. Šupraha, B. Edvardsen, I. Probert, and J. Henderiks. "High temperature decreases the PIC / POC ratio and increases phosphorus requirements in <i>Coccolithus pelagicus</i> (Haptophyta)." Biogeosciences Discussions 11, no. 1 (January 16, 2014): 1021–51. http://dx.doi.org/10.5194/bgd-11-1021-2014.
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Abstract. Rising ocean temperatures will likely increase stratification of the water column and reduce nutrient input into the photic zone. This will increase the likelihood of nutrient limitation in marine microalgae, leading to changes in the abundance and composition of phytoplankton communities, which in turn will affect global biogeochemical cycles. Calcifying algae, such as coccolithophores, influence the carbon cycle by fixing CO2 into particulate organic carbon (POC) through photosynthesis and into particulate inorganic carbon (PIC) through calcification. As calcification produces a net release of CO2, the ratio of PIC / POC determines whether coccolithophores act as a source (PIC / POC > 1) or a sink (PIC / POC < 1) of atmospheric CO2. We studied the effect of phosphorus (P-) limitation and temperature stress on the physiology and PIC / POC ratios of two subspecies of Coccolithus pelagicus. This large and heavily calcified species (PIC / POC generally > 1.5) is a major contributor to calcite export from the photic zone into deep-sea reservoirs. Phosphorus limitation did not influence exponential growth rates in either subspecies, but P-limited cells had significantly lower cellular P-content. A 5 °C temperature increase did not affect exponential growth rates either, but nearly doubled cellular P-content under both high and low phosphate availability. The PIC / POC ratios did not differ between P-limited and nutrient-replete cultures, but at elevated temperature (from 10 to 15 °C) PIC / POC ratios decreased by 40–60%. Our results suggest that elevated temperature may intensify P-limitation due to a higher P-requirement to maintain growth and POC production rates, possibly reducing abundances in a warmer ocean. Under such a scenario C. pelagicus may decrease its calcification rate relative to photosynthesis, resulting in PIC / POC ratios < 1 and favouring CO2-sequestration over release. Phosphorus limitation by itself is unlikely to cause changes in the PIC / POC ratio in this species.
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Chamane, Nkosinothando, Desmond Kuupiel, and Tivani Phosa Mashamba-Thompson. "Stakeholders’ Perspectives for the Development of a Point-of-Care Diagnostics Curriculum in Rural Primary Clinics in South Africa—Nominal Group Technique." Diagnostics 10, no. 4 (April 1, 2020): 195. http://dx.doi.org/10.3390/diagnostics10040195.
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Poor knowledge and adherence to point-of-care (POC) HIV testing standards have been reported in rural KwaZulu-Natal (KZN), a high HIV prevalent setting. Improving compliance to HIV testing standards is critical, particularly during the gradual phasing out of lay counsellor providers and the shifting of HIV testing and counselling duties to professional nurses. The main objective of this study was to identify priority areas for development of POC diagnostics curriculum to improve competence and adherence to POC diagnostics quality standards for primary healthcare (PHC) nurses in rural South Africa. Method: PHC clinic stakeholders were invited to participate in a co-creation workshop. Participants were purposely sampled from each of the 11 KwaZulu-Natal Districts. Through the Nominal Group Technique (NGT), participants identified training related challenges concerning delivery of quality point of care diagnostics and ranked them from highest to lowest priority. An importance ranking score (scale 1–5) was calculated for each of the identified challenges. Results: Study participants included three PHC professional nurses, one TB professional nurse, one HIV lay councilor, one TB assistant and three POC diagnostics researchers, aged 23–50. Participants identified ten POC diagnostics related challenges. Amongst the highest ranked challenges were the following:absence of POC testing Curriculum for nurses, absence of training of staff on HIV testing and counselling as lay counsellor providers are gradually being phased out,. absence of Continuous Professional Development opportunities and lack of Staff involvement in POC Management programs. Conclusion: Key stakeholders perceived training of PHC nurses as the highest priority for the delivery of quality POC diagnostic testing at PHC level. We recommend continual collaboration among all POC diagnostics stakeholders in the development of an accessible curriculum to improve providers’ competence and ensure sustainable quality delivery of POC diagnostic services in rural PHC clinics.
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Gerecht, A. C., L. Šupraha, B. Edvardsen, I. Probert, and J. Henderiks. "High temperature decreases the PIC / POC ratio and increases phosphorus requirements in <i>Coccolithus pelagicus</i> (Haptophyta)." Biogeosciences 11, no. 13 (July 3, 2014): 3531–45. http://dx.doi.org/10.5194/bg-11-3531-2014.
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Abstract. Rising ocean temperatures will likely increase stratification of the water column and reduce nutrient input into the photic zone. This will increase the likelihood of nutrient limitation in marine microalgae, leading to changes in the abundance and composition of phytoplankton communities, which in turn will affect global biogeochemical cycles. Calcifying algae, such as coccolithophores, influence the carbon cycle by fixing CO2 into particulate organic carbon through photosynthesis (POC production) and into particulate inorganic carbon through calcification (PIC production). As calcification produces a net release of CO2, the ratio of PIC to POC production determines whether coccolithophores act as a source (high PIC / POC) or a sink (low PIC / POC) of atmospheric CO2. We studied the effect of phosphorus (P-) limitation and high temperature on the physiology and the PIC / POC ratio of two subspecies of Coccolithus pelagicus. This large and heavily calcified species is a major contributor to calcite export from the photic zone into deep-sea reservoirs. Phosphorus limitation did not influence exponential growth rates in either subspecies, but P-limited cells had significantly lower cellular P-content. One of the subspecies was subjected to a 5 °C temperature increase from 10 °C to 15 °C, which did not affect exponential growth rates either, but nearly doubled cellular P-content under both high and low phosphate availability. This temperature increase reduced the PIC / POC ratio by 40–60%, whereas the PIC / POC ratio did not differ between P-limited and nutrient-replete cultures when the subspecies were grown near their respective isolation temperature. Both P-limitation and elevated temperature significantly increased coccolith malformations. Our results suggest that a temperature increase may intensify P-limitation due to a higher P-requirement to maintain growth and POC production rates, possibly reducing abundances in a warmer ocean. Under such a scenario C. pelagicus may decrease its calcification rate relative to photosynthesis, thus favouring CO2 sequestration over release. It seems unlikely that P-limitation by itself causes changes in the PIC / POC ratio in this species.
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Rosengard, S. Z., P. J. Lam, W. M. Balch, M. E. Auro, S. Pike, D. Drapeau, and B. Bowler. "Carbon export and transfer to depth across the Southern Ocean Great Calcite Belt." Biogeosciences 12, no. 13 (July 2, 2015): 3953–71. http://dx.doi.org/10.5194/bg-12-3953-2015.
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Abstract. Sequestration of carbon by the marine biological pump depends on the processes that alter, remineralize, and preserve particulate organic carbon (POC) during transit to the deep ocean. Here, we present data collected from the Great Calcite Belt, a calcite-rich band across the Southern Ocean surface, to compare the transformation of POC in the euphotic and mesopelagic zones of the water column. The 234Th-derived export fluxes and size-fractionated concentrations of POC, particulate inorganic carbon (PIC), and biogenic silica (BSi) were measured from the upper 1000 m of 27 stations across the Atlantic and Indian sectors of the Great Calcite Belt. POC export out of the euphotic zone was correlated with BSi export. PIC export was not, but did correlate positively with POC flux transfer efficiency. Moreover, regions of high BSi concentrations, which corresponded to regions with proportionally larger particles, exhibited higher attenuation of > 51 μm POC concentrations in the mesopelagic zone. The interplay among POC size partitioning, mineral composition, and POC attenuation suggests a more fundamental driver of POC transfer through both depth regimes in the Great Calcite Belt. In particular, we argue that diatom-rich communities produce large and labile POC aggregates, which not only generate high export fluxes but also drive more remineralization in the mesopelagic zone. We observe the opposite in communities with smaller calcifying phytoplankton, such as coccolithophores. We hypothesize that these differences are influenced by inherent differences in the lability of POC exported by different phytoplankton communities.
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Rosengard, S. Z., P. J. Lam, W. M. Balch, M. E. Auro, S. Pike, D. Drapeau, and B. Bowler. "Carbon export and transfer to depth across the Southern Ocean Great Calcite Belt." Biogeosciences Discussions 12, no. 3 (February 10, 2015): 2843–96. http://dx.doi.org/10.5194/bgd-12-2843-2015.
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Abstract. Sequestration of carbon by the marine biological pump depends on the processes that alter, remineralize and preserve particulate organic carbon (POC) during transit to the deep ocean. Here, we present data collected from the Great Calcite Belt, a calcite-rich band across the Southern Ocean surface, to compare the transformation of POC in the euphotic and mesopelagic zones of the water column. The 234Th-derived export fluxes and size-fractionated concentrations of POC, particulate inorganic carbon (PIC), and biogenic silica (BSi) were measured from the upper 1000 m of 27 stations across the Atlantic and Indian sectors of the Great Calcite Belt. POC export out of the euphotic zone was correlated with BSi export. PIC export was not, but did correlate positively with POC flux transfer efficiency. Moreover, regions of high BSi concentrations, which corresponded to regions with proportionally larger particles, exhibited higher attenuation of >51 μm POC concentrations in the mesopelagic zone. The interplay among POC size partitioning, mineral composition and POC attenuation suggests a more fundamental driver of POC transfer through both depth regimes in the Great Calcite Belt. In particular, we argue that diatom-dominated communities produce large and labile POC aggregates, which generate high export fluxes but also drive more remineralization in the mesopelagic zone. We observe the opposite in communities with smaller calcifying phytoplankton, such as coccolithophores. We hypothesize that these differences are influenced by inherent differences in the lability of POC exported by different phytoplankton communities.
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Reddy, Shabashini, Andrew Gibbs, Elizabeth Spooner, Noluthando Ngomane, Tarylee Reddy, Nozipho |Luthuli, Gita Ramjee, Anna Coutsoudis, and Photini Kiepiela. "Assessment of the Impact of Rapid Point-of-Care CD4 Testing in Primary Healthcare Clinic Settings: A Survey Study of Client and Provider Perspectives." Diagnostics 10, no. 2 (February 1, 2020): 81. http://dx.doi.org/10.3390/diagnostics10020081.
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Background: The high burden of disease in South Africa presents challenges to public health services. Point-of-care (POC) technologies have the potential to address these gaps and improve healthcare systems. This study ascertained the acceptability and impact of POC CD4 testing on patients’ health and clinical management. Methods: We conducted a qualitative survey study with patients (n = 642) and healthcare providers (n = 13) at the Lancers Road (experienced POC) and Chesterville (non-experienced POC) primary healthcare (PHC) clinics from September 2015 to June 2016. Results: Patients (99%) at Lancers and Chesterville PHCs were positive about POC CD4 testing, identifying benefits: No loss/delay of test results (6.4%), cost/time saving (19.5%), and no anxiety (5.1%), and 58.2% were ready to initiate treatment. Significantly more patients at Chesterville than Lancers Road PHC felt POC would provide rapid clinical decision making (64.7% vs. 48.1%; p < 0.0001) and better clinic accessibility (40.4% vs. 24.7%; p < 0.0001) respectively. Healthcare providers thought same-day CD4 results would impact: Clinical management (46.2%), patient readiness (46.2%), and adherence (23.0%), and would reduce follow-up visits (7.7%), while 38.5% were concerned that further tests and training (15.4%) were required before antiretroviral therapy (ART) initiation. Conclusion: The high acceptability of POC CD4 testing and the immediate health, structural, and clinical management benefits necessitates POC implementation studies.
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Economou, Emanuel V., Ariadne V. Malamitsi-Puchner, Christos P. Pitsavos, Evangelia E. Kouskouni, Ioanna Magaziotou-Elefsinioti, and George Creatsas. "Low-Grade Systemic Inflammation Profile, Unrelated to Homocysteinemia, in Obese Children." Mediators of Inflammation 2005, no. 6 (2005): 337–42. http://dx.doi.org/10.1155/mi.2005.337.
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To investigate in prepubertal obese children (POC) the profile of chronic low-grade systemic inflammation (CLGSI) and its relation to homocysteinemia, 72 POC were evaluated for serum C-reactive protein (CRP) and amyloid A (SAA) levels, both markers of CLGSI, and plasma levels of total homocysteine (tHcy), an independent risk factor for adult atherosclerosis, in comparison to 42 prepubertal lean children (PLC). The main observations in POC were higher CRP levels compared to PLC, positive association of SAA levels to CRP levels, no association of CRP or SAA levels to tHcy levels. Thus, in POC, positively interrelated to each other, elevated CRP and unaltered SAA levels reveal a unique profile of the CLGSI, not explaining homocysteinemia-induced risk for future atherosclerosis.
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Ajay, Pranay Shah, Caitlin Sok, Subir Goyal, Jeffrey M. Switchenko, Felipe Maegawa, Theresa Wicklin Gillespie, Chrystal M. Paulos, David A. Kooby, Timothy Kennedy, and Mihir Maheshkumar Shah. "Time to first treatment and optimal adjuvant treatment strategy in patients with resectable gastric cancer pathologically upstaged to lymph node–positive disease." Journal of Clinical Oncology 41, no. 4_suppl (February 1, 2023): 473. http://dx.doi.org/10.1200/jco.2023.41.4_suppl.473.
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473 Background: Treatment strategies in resectable gastric cancer (GC) patients include perioperative chemotherapy (PEC), postoperative chemoradiation therapy (POCR), and postoperative chemotherapy (POC). Treatment delay can lead to metastases with unfavorable outcomes. We aim to identify the distribution of patients upstaged to pathologically node positive disease (pLN+) stratified by time and the optimal treatment in this cohort. Methods: We analyzed resected GC patients in the National Cancer Database (2004-2016) with clinically node negative disease (cLN-). Time from diagnosis to first definitive therapy was stratified as ≤2, >2 to ≤4, and >4 weeks. The distribution of patients upstaged from cLN- to pLN+ disease, the concordance between cLN- and pathologically lymph node negative (pLN-) disease based on treatment strategy, and time to first definitive therapy was analyzed. POC and POCR were compared to evaluate their effect on overall survival (OS) in patients with cLN- upstaged to pLN+ disease. Kaplan-Meier test, log-rank test, multivariable Cox proportional hazards analysis (MVA) were performed. Results: Of the 4,828 gastric cancer patients with cLN- disease, 514 (10.65%) patients received PEC and 4,314 (89.35%) patients received upfront surgery followed by POCR/POC. Distribution of patients stratified by time between diagnosis to first definitive treatment - chemotherapy (PEC) or surgery (POC/POCR), for ≤2 weeks was 9.5% vs. 33%, >2 - ≤4 weeks was 28.4% vs. 24.2% and >4weeks was 62% vs 42.7%, respectively. Patients upstaged from cLN- to pLN+ disease in the PEC group was 43.37%(n=206), and 70%(n=2574) in the upfront surgery group (POC/POCR). Of the 206 (43.37%) patients upstaged from cLN- to pLN+ in the PEC cohort, the upstage rate was 7.77% when chemotherapy was started within 2 weeks of diagnosis, compared to 27.67% with >2 to ≤4 weeks, and 64.56% with >4 weeks. Of the 2,574 (70%) patients upstaged in the upfront surgery cohort (POCR/POC), 30.61% were upstaged in ≤2 weeks, 24.95% in >2 to ≤4 weeks, and 44.44% in ≥4 weeks. On MVA, patients with cLN- disease that were pLN- (POCR=766, POC=341) had no significant difference in OS when treated with POCR (HR 1.11, p=0.39) compared to POC. Patients with pLN+ (POCR=2300, POC=907) disease had an association with improved OS when treated with POCR (HR 0.78, p<0.001) compared to POC. Conclusions: When resectable gastric cancer patients undergoing upfront surgery are upstaged from clinically node negative to pathologically node positive disease, postoperative chemoradiation therapy may be the optimal treatment strategy compared to postoperative chemotherapy. Clinical nodal status may not be an optimal predictor of nodal disease.
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Krug, S. A., S. L. Eggers, and B. Matthiessen. "High nitrate to phosphorus ratio attenuates negative effects of rising <i>p</i>CO<sub>2</sub> on net population carbon accumulation." Biogeosciences Discussions 8, no. 4 (July 11, 2011): 6833–57. http://dx.doi.org/10.5194/bgd-8-6833-2011.
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Abstract. The ongoing rise in atmospheric pCO2 and the consequent increase in ocean acidification have direct effects on marine calcifying phytoplankton which potentially translates into altered carbon export. To date it remains unclear first, how nutrient ratio, in particular from coccolithophores preferred phosphate limitation, interacts with pCO2 on particulate carbon accumulation. Second, how direct physiological responses on the cellular level translate into a net population response. In this study cultures of Emiliania huxleyi were full-factorially exposed to two different N:P ratios (Redfield and high N:P) and three different pCO2 levels. Effects on net population particulate inorganic and organic carbon (PIC, POC) were measured after E. huxleyi cultures reached stationary phase. Thereby cell sizes and total cell abundance were taken into account. Corresponding to literature results show a significant negative cellular PIC and POC response which, however, was strongest under high N:P ratio. In contrast, net population PIC and POC accumulation was significantly attenuated under high N:P ratio. We suggest that less cellular nutrient accumulation allowed for higher cell abundances which compensated for the strong negative cellular PIC and POC response to pCO2 on the population level. Moreover, the design of this study also allowed following natural alteration of carbon chemistry through changing DIC and alkalinity. Our results suggest that at high initial pCO2 natural alteration of pCO2 during the experimental runtime was regulated by algal biomass. In contrast, at low initial pCO2 the PIC/POC ratio was responsible for changes in pCO2. Our results point to the fact that the physiological (i.e. cellular) PIC and POC response to ocean acidification cannot be linearly extrapolated to total population response and thus carbon export. It is therefore recommended to consider effects of nutrient limitation on cell physiology and translate these to net population carbon accumulation when predicting the influence of coccolithophores on both, the atmospheric pCO2 feedback and their function in carbon export mechanisms.
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Straseski, Joely A., Martha E. Lyon, William Clarke, Jeffrey A. DuBois, Lois A. Phelan, and Andrew W. Lyon. "Investigating Interferences of a Whole-Blood Point-of-Care Creatinine Analyzer: Comparison to Plasma Enzymatic and Definitive Creatinine Methods in an Acute-Care Setting." Clinical Chemistry 57, no. 11 (November 1, 2011): 1566–73. http://dx.doi.org/10.1373/clinchem.2011.165480.
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BACKGROUND Although measurement of whole-blood creatinine at the point of care offers rapid assessment of renal function, agreement of point-of-care (POC) results with central laboratory methods continues to be a concern. We assessed the influence of several potential interferents on POC whole-blood creatinine measurements. METHODS We compared POC creatinine (Nova StatSensor) measurements with plasma enzymatic (Roche Modular) and isotope dilution mass spectrometry (IDMS) assays in 119 hospital inpatients. We assessed assay interference by hematocrit, pH, pO2, total and direct bilirubin, creatine, prescribed drugs, diagnosis, red blood cell water fraction, and plasma water fraction. RESULTS CVs for POC creatinine were 1.5- to 6-fold greater than those for plasma methods, in part due to meter-to-meter variation. Regression comparison of POC creatinine to IDMS results gave a standard error (Sy|x) of 0.61 mg/dL (54 μmol/L), whereas regression of plasma enzymatic creatinine to IDMS was Sy|x 0.16 mg/dL (14 μmol/L). By univariate analysis, bilirubin, creatine, drugs, pO2, pH, plasma water fraction, and hematocrit were not found to contribute to method differences. However, multivariate analysis revealed that IDMS creatinine, red blood cell and plasma water fractions, and hematocrit explained 91.8% of variance in POC creatinine results. CONCLUSIONS These data suggest that whole-blood POC creatinine measurements should be used with caution. Negative interferences observed with these measurements could erroneously suggest adequate renal function near the decision threshold, particularly if estimated glomerular filtration rate is determined. Disparity between whole-blood and plasma matrices partially explains the discordance between whole-blood and plasma creatinine methods.
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Chuan, Chee Hoe, John Barry Gallagher, Swee Theng Chew, and M. Zanuri Norlaila Binti. "Blue carbon sequestration dynamics within tropical seagrass sediments: long-term incubations for changes over climatic scales." Marine and Freshwater Research 71, no. 8 (2020): 892. http://dx.doi.org/10.1071/mf19119.
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Determination of blue carbon sequestration in seagrass sediments over climatic time scales (>100 years) relies on several assumptions, including no loss of particulate organic carbon (POC) after 1–2 years, tight coupling between POC loss and CO2 emissions, no dissolution of carbonates, and removal of the recalcitrant black carbon (BC) contribution. We tested these assumptions via 500-day anoxic decomposition and mineralisation experiments to capture centennial parameter decay dynamics from two sediment horizons robustly dated as 2 and 18 years old. No loss of BC was detected, and decay of POC was best described for both horizons by near-identical reactivity continuum models. The models predicted average losses of 49 and 51% after 100 years of burial for the surface and 20–22-cm horizons respectively. However, the loss rate of POC was far greater than the release rate of CO2, even after accounting for CO2 from particulate inorganic carbon (PIC) production, possibly as siderite. The deficit could not be attributed to dissolved organic carbon or dark CO2 fixation. Instead, evidence based on δ13CO2, acidity and lack of sulfate reduction suggested methanogenesis. The results indicated the importance of centennial losses of POC and PIC precipitation and possibly methanogenesis in estimating carbon sequestration rates.
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Rhodes, Sybil Delaine, and Gabriel Guerrero. "HUMAN RIGHTS AND THE PROTECTION OF CIVILIANS IN UN PEACE OPERATIONS." Revista Política y Estrategia, no. 140 (January 13, 2023): 149–69. http://dx.doi.org/10.26797/rpye.vi140.1000.
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As human rights norms increased in importance in the international system, the Protection of Civilians (POC) doctrine became the center of gravity in modern Peace Operations (PO), generating new organizational and structural demands on the United Nations (UN), on other international organizations, and on countries that contribute with troops and police (T/PCC). Can POC be understood as a “graft” onto a broader human rights norm? Has POC doctrine become institutionalized? Has the POC norm “cascaded?” Finally, how can we best observe the POC “cascade” and evaluate its effects on the success of peace missions? This article attempts to answer these questions from the perspective of norm evolution or norm life cycle theory, in dialogue with existing more institutionalist and technical as well as political conversations about the successes and failures of peace missions. Our method is a medium-N study of the evolution of PO mandates and reform processes since 1945. We focus on nine missions and three key reform documents (, (the Brahimi report of 2000, the High Independent Panel Peace Operations [HIPPO] report of 2015 and the Action for Peacekeeping [A4P] Initiative of 2019) and find that POC has followed a path consistent with the “life cycle” approach of international norms. To fully determine the extent to which POC has “cascaded” as an independent norm, we argue that it is essential to pay close attention to the boundaries between the strategic, operational, and tactical levels of peace operations. In particular, actors at the operational level play the crucial role of decodifying POC for forces who implement tactics on the ground.
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Soria-Reinoso, Ismael, Javier Alcocer, Salvador Sánchez-Carrillo, Felipe García-Oliva, Daniel Cuevas-Lara, Daniela Cortés-Guzmán, and Luis A. Oseguera. "The Seasonal Dynamics of Organic and Inorganic Carbon along the Tropical Usumacinta River Basin (Mexico)." Water 14, no. 17 (August 30, 2022): 2703. http://dx.doi.org/10.3390/w14172703.
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Rivers are important sites for carbon (C) transport and critical components of the global C cycle that is currently not well constrained. However, little is known about C species’ longitudinal and temporal changes in large tropical rivers. The Usumacinta River is Mexico’s main lotic system and the tenth largest in North America. Being a tropical river, it has a strong climatic seasonality. This study aims to evaluate how organic (DOC and POC) and inorganic (DIC and PIC) carbon change spatially and seasonally along the Usumacinta River (medium and lower basin) in rainy (RS-2017) and dry (DS-2018) seasons and to estimate C fluxes into the southern Gulf of Mexico. Concentrations of DOC, POC, DIC, and PIC ranged from 0.88 to 7.11 mg L−1, 0.21 to 3.78 mg L−1, 15.59 to 48.27 mg L−1, and 0.05 to 1.51 mg L−1, respectively. DOC was the dominant organic species (DOC/POC > 1). It was ~doubled in RS and showed a longitudinal increase, probably through exchange with wetlands and floodplains. Particulate carbon showed a positive relationship with the total suspended solids, suggesting that in RS, it derived from surface erosion and runoff in the watershed. DIC is reported for the first time as the highest concentration measured in tropical rivers in America. It was higher in the dry season without a longitudinal trend. The C mass inflow–outflow balance in the RS suggested net retention (DOC and POC sink) in floodplains. In contrast, in the DS, the balance suggested that floodplains supply (C source) autochthonous DOC and POC. The lower Usumacinta River basin is a sink for DIC in both seasons. Finally, the estimated annual C export for the Usumacinta-Grijalva River was 2.88 (2.65 to 3.14) Tg yr−1, of which DIC was the largest transported fraction (85%), followed by DOC (10%), POC (4%), and PIC (<1%). This investigation is the first to present the C loads in a Mexican river.
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Mazarrasa, I., N. Marbà, C. E. Lovelock, O. Serrano, P. S. Lavery, J. W. Fourqurean, H. Kennedy, et al. "Seagrass meadows as a globally significant carbonate reservoir." Biogeosciences Discussions 12, no. 5 (March 6, 2015): 4107–38. http://dx.doi.org/10.5194/bgd-12-4107-2015.
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Abstract. There has been a growing interest in quantifying the capacity of seagrass ecosystems to act as carbon sinks as a natural way of offsetting anthropogenic carbon emissions to the atmosphere. However, most of the efforts have focused on the organic carbon (POC) stocks and accumulation rates and ignored the inorganic carbon (PIC) fraction, despite important carbonate pools associated with calcifying organisms inhabiting the meadows, such as epiphytes and benthic invertebrates, and despite the relevance that carbonate precipitation and dissolution processes have in the global carbon cycle. This study offers the first assessment of the global PIC stocks in seagrass sediments using a synthesis of published and unpublished data on sediment carbonate concentration from 402 vegetated and 34 adjacent un-vegetated sites. PIC stocks in the top 1 m sediments ranged between 3 and 1660 Mg PIC ha-1, with an average of 654 ± 24 Mg PIC ha-1, exceeding about 5 fold those of POC reported in previous studies. Sedimentary carbonate stocks varied across seagrass communities, with meadows dominated by Halodule, Thalassia or Cymodocea supporting the highest PIC stocks, and tended to decrease polewards at a rate of -8 ± 2 Mg PIC ha-1 degree-1 of latitude (GLM, p < 0.0003). Using PIC concentration and estimates of sediment accretion in seagrass meadows, mean PIC accumulation rates in seagrass sediments is 126.3 ± 0.7 g PIC m-2 y-1. Based on the global extent of seagrass meadows (177 000 to 600 000 km2), these ecosystems globally store between 11 and 39 Pg of PIC in the top meter of sediment and accumulate between 22 and 76 Tg PIC y-1, representing a significant contribution to the carbonate dynamics of coastal areas. Despite that these high rates of carbonate accumulation imply CO2 emissions from precipitation, seagrass meadows are still strong CO2 sinks as demonstrates the comparison of carbon (POC and POC) stocks between vegetated and adjacent un-vegetated sediments.
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Hofer, Stefan, Christoph J. Schlimp, Sebastian Casu, and Elisavet Grouzi. "Management of Coagulopathy in Bleeding Patients." Journal of Clinical Medicine 11, no. 1 (December 21, 2021): 1. http://dx.doi.org/10.3390/jcm11010001.
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Early recognition of coagulopathy is necessary for its prompt correction and successful management. Novel approaches, such as point-of-care testing (POC) and administration of coagulation factor concentrates (CFCs), aim to tailor the haemostatic therapy to each patient and thus reduce the risks of over- or under-transfusion. CFCs are an effective alternative to ratio-based transfusion therapies for the correction of different types of coagulopathies. In case of major bleeding or urgent surgery in patients treated with vitamin K antagonist anticoagulants, prothrombin complex concentrate (PCC) can effectively reverse the effects of the anticoagulant drug. Evidence for PCC effectiveness in the treatment of direct oral anticoagulants-associated bleeding is also increasing and PCC is recommended in guidelines as an alternative to specific reversal agents. In trauma-induced coagulopathy, fibrinogen concentrate is the preferred first-line treatment for hypofibrinogenaemia. Goal-directed coagulation management algorithms based on POC results provide guidance on how to adjust the treatment to the needs of the patient. When POC is not available, concentrate-based management can be guided by other parameters, such as blood gas analysis, thus providing an important alternative. Overall, tailored haemostatic therapies offer a more targeted approach to increase the concentration of coagulation factors in bleeding patients than traditional transfusion protocols.
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Manik, Fatiani, Bina Beru Karo, Rina Christina Hutabarat, and Darkam Musaddad. "Respon Tanaman Brokoli (Brassica oleracea) terhadap Pupuk Organik Cair." Agriprima : Journal of Applied Agricultural Sciences 5, no. 2 (September 30, 2021): 122–30. http://dx.doi.org/10.25047/agriprima.v5i2.434.
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Penggunaan pupuk organik sebagai alternatif pengganti pupuk anorganik dapat mengurangi pencemaran lingkungan. Tujuan dari penelitian ini adalah mengetahui pengaruh jenis dan konsentrasi pupuk organik cair (POC) terhadap pertumbuhan dan hasil brokoli (Brassica oleracea). Penelitian dilaksanakan di IP2TP Berastagi pada bulan Mei sampai dengan September 2020. Penelitian menggunakan Rancangan Acak Kelompok (RAK) dengan 3 kali ulangan dan 10 perlakuan. Perlakuan yang diuji adalah sebagai berikut: A: tanpa POC (Kontrol), B: POC kotciplus 10 ml/L, C: POC kotciplus 20 ml/L D: POC kotciplus 30 ml/L, E: POC kipait 10 ml/L, F: POC kipait 20 ml/L, G: POC kipait 30 ml/L, H: POC limbah buah 10 ml/L, I: POC limbah buah 20 ml/L, J: POC limbah buah 30 ml/L. Hasil penelitian menunjukkan bahwa POC yang terbaik adalah POC kotciplus. POC kotciplus 20 ml/L, dan POC kotciplus 30 ml/L menunjukkan diameter kanopi terlebar yaitu masing-masing (52,35 cm dan 51,71 cm). Pemberian POC kotciplus 30 ml/L mampu meningkatkan hasil brokoli dilihat dari diameter bunga, bobot bunga per tanaman, bobot kuntum dan bobot bunga per plot.
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Jin, Huijun, and Qiang Ma. "Impacts of Permafrost Degradation on Carbon Stocks and Emissions under a Warming Climate: A Review." Atmosphere 12, no. 11 (October 29, 2021): 1425. http://dx.doi.org/10.3390/atmos12111425.
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A huge amount of carbon (C) is stored in permafrost regions. Climate warming and permafrost degradation induce gradual and abrupt carbon emissions into both the atmosphere and hydrosphere. In this paper, we review and synthesize recent advances in studies on carbon stocks in permafrost regions, biodegradability of permafrost organic carbon (POC), carbon emissions, and modeling/projecting permafrost carbon feedback to climate warming. The results showed that: (1) A large amount of organic carbon (1460–1600 PgC) is stored in permafrost regions, while there are large uncertainties in the estimation of carbon pools in subsea permafrost and in clathrates in terrestrial permafrost regions and offshore clathrate reservoirs; (2) many studies indicate that carbon pools in Circum-Arctic regions are on the rise despite the increasing release of POC under a warming climate, because of enhancing carbon uptake of boreal and arctic ecosystems; however, some ecosystem model studies indicate otherwise, that the permafrost carbon pool tends to decline as a result of conversion of permafrost regions from atmospheric sink to source under a warming climate; (3) multiple environmental factors affect the decomposability of POC, including ground hydrothermal regimes, carbon/nitrogen (C/N) ratio, organic carbon contents, and microbial communities, among others; and (4) however, results from modeling and projecting studies on the feedbacks of POC to climate warming indicate no conclusive or substantial acceleration of climate warming from POC emission and permafrost degradation over the 21st century. These projections may potentially underestimate the POC feedbacks to climate warming if abrupt POC emissions are not taken into account. We advise that studies on permafrost carbon feedbacks to climate warming should also focus more on the carbon feedbacks from the rapid permafrost degradation, such as thermokarst processes, gas hydrate destabilization, and wildfire-induced permafrost degradation. More attention should be paid to carbon emissions from aquatic systems because of their roles in channeling POC release and their significant methane release potentials.
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Wei, C. L., S. Y. Lin, D. D. D. Sheu, W. C. Chou, M. C. Yi, P. H. Santschi, and L. S. Wen. "Particle-reactive radionuclides (<sup>234</sup>Th, <sup>210</sup>Pb, <sup>210</sup>Po) as tracers for the estimation of export production in the South China Sea." Biogeosciences Discussions 8, no. 5 (September 28, 2011): 9671–707. http://dx.doi.org/10.5194/bgd-8-9671-2011.
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Abstract. The time-series station, SEATS (18° N, 116° E) in the South China Sea was visited six times during October 2006–December 2008 to carry out seawater sampling and floating trap deployments for the determination of distributions and fluxes of POC, PIC, PN, 234Th, 210Pb, and 210Po in the upper 200 m of the water column. Radionuclide deficiencies resulted in removal fluxes from the euphotic layer of 1.1 × 103–1.8 × 103 dpm m−2 d−1 and 7.1–40.2 dpm m−2 d−1 for 234Th and 210Po, respectively. Due to atmospheric input, an excess of 210Pb relative to 226Ra is commonly observed in the upper water column. Sinking fluxes of total mass, POC, PIC, PN, 234Th, 210Pb, and 210Po measured at the euphotic depth were low in summer-fall and high in winter-spring, reflecting the seasonal variability of biological pumping. Excluding the suspiciously low primary productivity data point in July 2007, a relatively high e-ratio of 0.28–0.69 was estimated by the ratio of the POC flux at the euphotic depth and the integrated primary productivity. The ratios of 234Th, 210Pb, and 210Po to organic carbon, inorganic carbon, and nitrogen in the sinking particles were combined with the disequilibria of 234Th-238U, 210Pb-226Ra, and 210Po-210Pb to estimate export fluxes of POC, PIC, and PN from the euphotic layer. Compared with measured fluxes by the sediment trap and estimated fluxes by other approaches, it is concluded that the export production in the South China Sea, ranging from 1.8 to 21.3 mmol-C m−2 d−1, can be reasonably estimated using 234Th, 210Pb, and 210Po as carbon proxies.
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Wei, C. L., S. Y. Lin, D. D. D. Sheu, W. C. Chou, M. C. Yi, P. H. Santschi, and L. S. Wen. "Particle-reactive radionuclides (<sup>234</sup>Th, <sup>210</sup>Pb, <sup>210</sup>) as tracers for the estimation of export production in the South China Sea." Biogeosciences 8, no. 12 (December 21, 2011): 3793–808. http://dx.doi.org/10.5194/bg-8-3793-2011.
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Abstract. The time-series station, SEATS (18° N, 116° E) in the South China Sea was visited six times during October 2006–December 2008 to carry out seawater sampling and floating trap deployments for the determination of distributions and fluxes of POC, PIC, PN, 234Th, 210Pb, and 210Po in the upper 200 m of the water column. Radionuclide deficiencies resulted in removal fluxes from the euphotic layer of 1.1×103–1.8×103 dpm m−2d−1 and 7.1–40.2 dpm m−2d−1 for 234Th and 210Po, respectively. Due to atmospheric input, an excess of 210Pb relative to 226Ra is commonly observed in the upper water column. Sinking fluxes of total mass, POC, PIC, PN, 234Th, 210Pb, and 210Po measured at the euphotic depth were low in summer-fall and high in winter-spring, reflecting the seasonal variability of biological pumping. Excluding the suspiciously low primary productivity data point in July 2007, a relatively high e-ratio of 0.28–0.69 was estimated by the ratio of the POC flux at the euphotic depth and the integrated primary productivity. The ratios of 234Th, 210Pb, and 210Po to organic carbon, inorganic carbon, and nitrogen in the sinking particles were combined with the disequilibria of 234Th–238U, 210Pb–226Ra, and 210Po–210Pb to estimate export fluxes of POC, PIC, and PN from the euphotic layer. Compared with measured fluxes by the sediment trap and estimated fluxes by other approaches, it is concluded that the export production in the South China Sea, ranging from 1.8 to 21.3 mmol-C m−2d−1, can be reasonably estimated using 234Th, 210Pb, and 210Po as carbon proxies.
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Tulungen, Antje Grace, Maria G. M. Polii, Jelie Viekson Porong, Stanley A. F. Walingkas, Beatrix Doodoh, Jeane S. M. Raintung, Stella M. Th Tulung, Rinny Mamarimbing, and Tommy Djoice Sondakh. "Effect of Addition of Liquid Organic Fertilizer (POC) to Tofu Liquid Waste on POC Kirinyuh to Increase the Number of Tillers of Rice (Oryza sativa L.)." Jurnal Agroekoteknologi Terapan 4, no. 2 (July 31, 2023): 323–28. http://dx.doi.org/10.35791/jat.v4i2.49395.
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Tofu liquid organic fertilizer (POC limbah cair tahu) and Kirinyuh liquid organic fertilizer (POC Kirinyuh) will complement each other's nutrient needs and increase rice yields. The study aims to 1) study the effect of adding POC limbah cair tahu to POC Kirinyuh to increase the number of rice plant tillers, 2) obtain the dose of POC limbah cair tahu and POC Kirinyuh in increasing the number of productive tillers of rice plants. The study used a factorial pattern Complete Randomized Design. The treatment consists of 3 treatments repeated 5 times. The treatment is: A = 50 ml POC limbah cair tahu/liter water, B = 50 ml POC Kirinyuh/ 1 liter water+50 ml POC limbah cair tahu /liter water, C = 100 ml POC Kirinyuh/ 1 liter water+50 ml POC limbah cair tahu /liter water. The variables observed were the total number of tillers and the number of productive tillers. The data were analyzed using ANOVA and if there was an effect of treatment, it was continued with the Smallest Real Difference Test (BNT) at the test level of 5%. The results showed that POC limbah cair tahu added to POC Kirinyuh increased the number of rice plant tillers. The concentration of 50 ml of POC limbah cair tahu / 1 liter of water added to 100 ml of POC Kirinyuh / 1 liter of water gives the total number of tillers and the highest number of productive tillers at 65.50 and 45.25 per pot. Keywords: number of rice plant tillers, POC tofu liquid waste, POC Kirinyuh Abstrak POC limbah cair tahu dan POC Kirinyuh akan saling melengkapi kebutuhan hara dan meningkatkan hasil tanaman padi. Penelitian bertujuan untuk 1) mempelajari pengaruh penambahan POC limbah cair tahu pada POC Kirinyuh untuk meningkatkan jumlah anakan tanaman padi, 2) Memperoleh dosis POC limbah cair tahu dan POC Kirinyuh dalam meningkatkan jumlah anakan produktif tanaman padi. Penelitian menggunakan Rancangan Acak Lengkap pola faktorial. Perlakuan terdiri dari 3 perlakuan yang diulang sebanyak 5 kali. Perlakuan tersebut adalah: A = 50 ml POC limbah cair tahu/liter air, B = 50 ml POC Kirinyuh/ 1 liter air+50 ml POC limbah cair tahu/liter air, C = 100 ml POC kirinyuh/ 1 liter air+50 ml POC limbah cair tahu/liter air. Variabel yang diamati adalah jumlah anakan total dan jumlah anakan produktif. Data dianalisis menggunakan Anova dan jika terdapat pengaruh perlakuan dilanjutkan dengan Uji Beda Nyata Terkecil (BNT) pada taraf uji 5 %. Hasil penelitian menunjukan bahwa POC limbah cair tahu yang ditambahkan pada POC Kirinyuh meningkatkan jumlah anakan tanaman padi. Konsentrasi 50 ml POC limbah cair tahu/1 liter air ditambahkan pada 100 ml POC kirinyuh/1 liter air memberikan jumlah anakan total dan jumlah anakan produktif paling banyak yaitu 65,50 dan 45,25 per pot. Kata kunci : jumlah anakan padi, POC limbah cair tahu , POC Kirinyuh
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Nicolas, A., J. Lemerre, M. Tas, S. Jouneau, and M. Lederlin. "15 minutes pour comprendre : PIC, PINS, PHS, POC..." Journal d'imagerie diagnostique et interventionnelle 2, no. 2 (April 2019): 73–77. http://dx.doi.org/10.1016/j.jidi.2019.01.005.
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Aminu Yusuf, Nafisa, Che Su Mustaffa, and Bahtiar Mohamad. "External Perception of Organisational Culture and Customer Based Corporate Reputation: The Mediating Role of Transparent Communication." Journal of Social Sciences Research, SPI6 (December 25, 2018): 638–45. http://dx.doi.org/10.32861/jssr.spi6.638.645.
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Companies that are able to take advantage of good reputation are likely to increase their economic performance by retaining large customer base. While studies have established a direct relationship between organisational culture and corporate reputation, scholars have argued that there is paucity of studies that examined external perception of organisational culture (POC) on customer based corporate reputation (CBCR). Similarly, studies have not examined the causal link through which POC influence CBCR. Hence, this present study was conducted to provide additional insight by examining the mediating role of transparent communication (TC) on the relationships between POC and CBCR. The data for this study was collected from 321customers of three major insurance companies (Custodians and Allied Insurance, Mutual Benefits, NEM Insurance PLC) in Nigeria. The study utilized PLS-SEM path modelling with the aid of SmartPLS 2.0 software to test the research hypotheses. The findings revealed that TC plays a competitive mediating role by changing the negative significant relationship between POC and CBCR to significant positive relationship. As such, a competitive mediation was established between POC and CBCR through TC. The study recommended the need for insurance companies to engage in aggressive communication strategy by focusing on transparent communication to foster better insurance awareness with a view to improving their reputation in the eyes of the Nigerian public.
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Trybou, Vincent. "Attention, POC !" Cerveau & Psycho N° 133, no. 6 (January 6, 2021): 56–63. http://dx.doi.org/10.3917/cerpsy.133.0056.
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Shirey, Terry L. "POC Lactate." Point of Care: The Journal of Near-Patient Testing & Technology 6, no. 3 (September 2007): 192–200. http://dx.doi.org/10.1097/poc.0b013e3181271545.
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Muryanto, Muryanto, Priyono Priyono, and Siswadi Siswadi. "Kajian Konsentrasi Pupuk Organik Cair Terhadap Pertumbuhan dan Hasil Jagung Manis (Zeamays L)." J-Plantasimbiosa 5, no. 2 (November 1, 2023): 29–33. http://dx.doi.org/10.25181/jplantasimbiosa.v5i2.3215.
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Jagung (Zea mays saccarata L.) merupakan salah satu tanaman pangan yang mempunyai nilai strategis, kebutuhan jagung manis di Indonesia terus meningkat seiring dengan meningkatnya jumlah penduduk dan penggunaannya sebagai produk olahan. Penelitian ini bertujuan untuk membandingkan pengaruh aplikasi POC Kelinci, POC Kambing, dan POC Sapi terhadap tanaman jagung manis (Zea mays saccarata L). Metode yang digunakan berupa Rancangan Acak Kelompok Lengkap (RAKL) faktor tunggal, terdapat 10 satuan percobaan setiap satuan percobaan diulang sebanyak 3 (tiga) kali. Penelitian ini menggunakan perlakuan sebagai berikut: tanpa perlakuan kontrol (K0), dosis POC Kelinci 40 ml/L air (K1), POC Kelinci 40 ml/L air (K2), POC Kelinci 60 ml/L air (K3), POC Kambing 20 ml/L air (K4), POC Kambing 40 ml/L air (K5), POC Kambing 60 ml/L air (K6), POC Sapi 25 ml/L air (K7), POC Sapi 50 ml/L air (K8), POC Sapi 75 ml/L air (K9). Data pengamatan di analisis menggunakan ANOVA dan diteruskan menggunakan uji BNT dengan taraf 1 %. Hasil penelitian menunjukkan bahwa pemberian konsentrasi 20 ml/L POC Kelinci memberikan hasil terbaik pada parameter berat tongkol berkelobotsebesar 256, 17 g/ tanaman atau 25, 62 ton/ ha.Kata Kunci: POC, urin, kambing, sapi, kelinci.
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Sri Rahayu, Khalidin. "PENGARUH APLIKASI POC TERHADAP PERTUMBUHAN DAN PRODUKSI RUMPUT GAJAH PADA PEMOTONGAN KE DUA." Jurnal Agroristek 2, no. 1 (May 30, 2019): 30–36. http://dx.doi.org/10.47647/jar.v2i1.92.
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Untuk mengetahui respon pertumbuhan dan produksi rumput gajah akibat aplikasi POC dilakukan suatu penelitian dengan menggunakan Metode Rancangan Acak Kelompok (RAK) yang terdiri dari empat perlakuan dengan enam ulangan. Masing-masing perlakuan adalah P0 (0 ml POC/ltr air sebagai kontrol), P1 (3 ml POC/ltr air), P2 (5 ml POC/ltr air) dan P3 (7 ml POC/ltr air). Parameter yang diamati yaitu tinggi tanaman, jumlah anakan, diameter batang dan produksi. Penggunaan POC dengan dosis yang berbeda berpengaruh sangat nyata terhadap tinggi rumput gajah, rumput gajah tertinggi dosis 7 ml/lt. Jumlah anakan tidak dipengaruhi akibat dari aplikasi dosis POC. Lingkar batang akibat perlakuan dosis POC memperlihatkan adanya pengaruh yang nyata pada umur 20 HSPP dan pada umur 35 HSPP serta 50 HSPP berpengaruh sangat nyata. Lingkar batang terbaik dijumpai pada perlakuan dosis POC 7 ml/lt. Produksi rumput gajah pengaruh yang sangat nyata akibat dosis POC, produksi tertinggi dijumpai pada perlakuan dodis POC 7 ml/lt.Kata kunci: POC, rumput gajah, pertumbuhan dan produksi.
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Nursani, Nursani, Rika Hari Lestari, Reski Amaliah, and Sri Arisandi. "Respon Pemberian Pupuk Organik Cair Bonggol Pisang dan Ampas Tahu Terhadap Pertumbuhan Tanaman Rumput Odot (Pennisetum purpureum cv.mott)." Buletin Peternakan Tropis 4, no. 2 (November 29, 2023): 143–47. http://dx.doi.org/10.31186/bpt.4.2.143-147.
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The research aim to see efectiviness of using banana humps POC and tofu cake on the growth of Odot grass. This study implemented Randomized Group Design (RGD) with 5 different treatment, then each treatment was repeated 4 times. These treatment include: P0 (control), P1 (banana humps POC 100 ml), P2 (banana humps POC 200 ml), P3 (tofu cake POC 100 ml), P4 (tofu cake POC 200 ml). The results of this study indicate that the aplication of banana humps POC and tofu cake POC 100 ml and 200 ml has a significant impact (P<0.05) on plant height, number of leaves, number of tillers and plant fresh weight. The conclusion was that optimal development of Odot grass plants was seen in treatments P2 (banana humps POC 200 ml) and P4 (tofu cake POC 200 ml). Keywords: Banana humps, Tofu cake, Odot grass, Growth ABSTRAK Tujuan penelitian ini yaitu untuk melihat efektivitas penggunaan POC bonggol pisang dan POC ampas tahu terhadap pertumbuhan rumput Odot. Penelitian ini menerapkan RAK (rancangan acak kelompok) dengan 5 perlakuan yang berbeda, kemudian masing-masing perlakuan diulang sebanyak 4 kali. Perlakuan tersebut mencakup: P0 (kontrol), P1 (POC bonggol pisang 100 ml), P2 (POC bonggol pisang 200 ml), P3 (POC ampas tahu 100 ml), P4 (POC ampas tahu 200 ml). Hasil penelitian mengidentifikasi bahwa penggunaan POC bonggol pisang dan POC ampas tahu dengan konsentrasi 100 ml dan 200 ml memiliki dampak yang signifikan (P<0.05) pada tinggi tanaman, jumlah daun, jumlah anakan dan berat segar tanaman. Kesimpulannya adalah bahwa perkembangan optimal dari tanaman rumput Odot terlihat pada perlakuan P2 (POC bonggol pisang 200 ml) dan P4 (POC ampas tahu 200 ml). Kata kunci: Bonggol pisang, Ampas tahu, Rumput odot, Pertumbuhan
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Monareh, Jonathan Monareh, Jeanne M. Paulus, and Sandra E. Pakasi. "Utilization Of Water Fertilizer (Azolla pinnata) As A Liquid Organic Fertilizer In Pakcoy (Brassica rapa L.)." Jurnal Agroekoteknologi Terapan 4, no. 1 (January 30, 2023): 74–83. http://dx.doi.org/10.35791/jat.v4i1.44121.
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This study aims to determine the effect of POC Azolla on the growth and yield of pakcoy (Brassica rapa L) and to dete rmine the best concentration of POC Azolla on the growth and yield of pakcoy (Brassica rapa L). The type of research used is an experimental method to test the effectiveness of POC Azolla against pakcoy plants. The design used in this study was a completely randomized design (CRD). In this experiment there were 4 treatments and 5 replications, namely P0 = 0 ml/liter of water (without POC), P1 = POC 100 ml/l liter of water, P2 = POC 150 ml/l liter of water, P3 = POC 200 ml/l liters of water. Parameters observed were plant height, number of plant leaves, plant leaf width and fresh weight. Based on the results of research that has been carried out on pakcoy plants using POC azolla with treatment concentrations of P0=POC 0.0ml/liter of water, P1=POC of 100ml/liter of water, P2=POC of 150ml/liter of water and P3=POC of 200ml/liter of water. So it can be concluded that the administration of POC azolla had a significant effect on all parameters, namely plant height, leaf width, number of leaves, and fresh weight of pakcoy plants at 3 WAP to 6 WAP. Keywords: Azolla pinnata, Liquid Organic Fertilizer, Brassica rapa L. Abstrak Penelitian ini bertujuan untuk mengetahui pengaruh POC Azolla terhadap pertumbuhan dan hasil tanaman pakcoy (Brassica rapa L) dan untuk mengetahui konsentrasi POC Azolla yang terbaik terhadap pertumbuhan dan hasil tanaman pakcoy (Brassica rapa L). Jenis penelitian yang digunakan adalah metode eksperimen untuk menguji efektivitas POC Azolla terhadap tanaman pakcoy. Rancangan yang digunakan dalam penelitian ini adalah Rancangan Acak Lengkap (RAL). Pada percobaan ini terdapat 4 perlakuan dan 5 ulangan yaitu P0 = 0 ml/liter air (tanpa POC), P1 = POC 100 ml/l liter air, P2 = POC 150 ml/l liter air, P3 = POC 200 ml/l liter air. Parameter yang diamati adalah tinggi tanaman, jumlah daun tanaman, lebar daun tanaman dan bobot segar. Berdasarkan hasil penelitian yang telah dilakukan pada tanaman pakcoy menggunakan POC azolla dengan perlakuan konsentrasi P0=POC 0,0ml/liter air, P1=POC 100ml/liter air, P2=POC 150ml/liter air dan P3=POC sebanyak 200ml/liter air. Sehingga dapat disimpulkan bahwa pemberian POC azolla berpengaruh nyata terhadap semua parameter yaitu tinggi tanaman, lebar daun, jumlah daun, dan bobot segar tanaman pakcoy pada 3 MST sampai 6 MST. Kata kunci: Azolla pinnata, Pupuk Organik Cair, Brassica rapa L.
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Setyawan, Setyawan, and Junaidi Pangeran Saputra. "Kajian Penambahan Konsentrat Ampas Tahu Terhadap Pertambahan Berat Badan Sapi Peranakan Ongole." Jurnal Pengembangan Penyuluhan Pertanian 18, no. 34 (December 31, 2021): 166. http://dx.doi.org/10.36626/jppp.v18i34.704.
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ABSTRAKTernak sapi potong Peranakan Ongole (PO) memiliki keunggulan sebagai sapi tropis; tahan panas, tahan gangguan parasit dan toleransi terhadap pakan yang mengandung serat kasar tinggi. Kajian ini bertujuan untuk melihat penambahan konsentrat ampas tahu terhadap PBB ternak sapi potong PO. Metode menggunakan ternak sapi PO betina berjumlah 4 ekor, umur sapi PO1 dan PO2 berumur ≥ 2 tahun, sapi PO3 dan PO4 berumur ≤ 2 tahun. Pemberian ampas tahu sebanyak 1% dan hijauan 10% dari berat badan, penentuan jumlah pakan yang diberikan berdasarkan berat badan awal ternak sapi PO yaitu: PO1 berat badan awal 428 kg, ampas tahu 4,3 kg, hijauan 43 kg, PO2 berat bawal 297 kg, ampas tahu 3,0 kg, hijauan 30 kg, PO3 berat badan awal 203 kg, ampas tahu 2,0 kg, hijauan 20 kg, PO4 berat badan awal 142 kg, ampas tahu 1,4 kg, hijauan 14 kg. Peubah yang diukur adalah PBBH ternak sapi PO selama tiga bulan. Analisis data menggunakan analisis deskriptif. Hasil kajian bahwa ternak sapi PO yang diberikan hijauan dan konsentrat ampas tahu memiliki rata-rata PBBH 0,55 kg/ekor/hari. Ternak sapi PO2 memiliki rata-rata PBBH paling tinggi (0,70 kg/ekor/hari) dan terendah ternak sapi PO4 (0,28 kg/ekor/hari). Rata-rata PBB selama tiga bulan pada sapi PO1: 27,7 kg/ekor/bulan, PO2: 44,7 kg/ekor/bulan, PO3: 37,7 kg/ekor/bulan, PO4: 13,2 kg/ekor/bulan. Rata-rata PBB sapi PO keseluruhan selama 3 bulan yaitu 30,7 kg. Kesimpulan bahwa rata-rata PBBH ternak sapi PO adalah 0,55 kg dan rata-rata PBB seluruh ternak sapi PO per tiga bulan yaitu 30,7 kg.Kata kunci: Ampas Tahu, Pertambahan Berat Badan, Sapi Peranakan OngoleABSTRACTOngole Peranakan (PO) beef cattle have advantages as tropical cattle; heat resistance, parasitic disturbance resistance, and tolerance to feeds containing high crude fiber. This study aims to see the addition of tofu pulp concentrate to PBB of PO beef cattle. The method uses 4 female PO cattle, PO1 and PO2 cattle aged 2 years, PO3 and PO4 cows 2 years old. Giving tofu dregs as much as 1% and forage 10% of body weight, determining the amount of feed given based on the initial body weight of PO cattle, namely: PO1 initial body weight 428 kg, tofu dregs 4,3 kg, forage 43 kg, PO2 pomfret weight 297 kg, tofu dregs 3,0 kg, forage 30 kg, PO3 initial weight 203 kg, tofu dregs 2,0 kg, forage 20 kg, PO4 initial weight 142 kg, tofu dregs 1,4 kg, forage 14 kg. The variable measured was the PBBH of PO cattle for three months. Data analysis used descriptive analysis. The results of the study showed that PO cattle that were given forage and tofu waste concentrate had an average PBBH of 0,55 kg/head/day. PO2 cattle had the highest average PBBH (0,70 kg/head/day) and the lowest were PO4 cattle (0,28 kg/head/day). Average PBB for three months in cattle PO1: 27,7 kg/head/month, PO2: 44,7 kg/head/month, PO3: 37,7 kg/head/month, PO4: 13,2 kg/head /month. The average PBB of PO cattle for 3 months is 30,7 kg. The conclusion is that the average PBBH of PO cattle is 0,55 kg and the average PBBH of all PO cattle per three months is 30,7 kg.Keywords: Ongole Breeding Cattle, Tofu Residue, Weight Gain
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Haryanta, Dwi, Tatuk Tojibatus Sa’adah, and Novita Dwi Weni. "Aplikasi Pupuk Organik Cair Dari Limbah Organik Perkotaan Pada Tanaman Melon (Cucumis melo L)." Jurnal Agroteknologi Merdeka Pasuruan 7, no. 1 (June 27, 2023): 22. http://dx.doi.org/10.51213/jamp.v7i1.82.
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Produk buah melon organik yang dihasilkan dari sistem pertanian perkotaan mandiri akan berkontribusi pada terwujudnya keamanan pangan bagi masyarakat perkotaan. Penelitian bertujuan mempelajari penggunaan pupuk organik cair (POC) yang berasal dari limbah organik perkotaan dalam budidaya melon dengan sistem urban farming.Penelitian menggunakan percobaan faktorial, dengan perlakuan faktor satu adalah jenis bahan baku yaitu P0 : kontrol, P1 : POC dari limbah sayuran; P2 : POC dari limbah buah; P3 : POC dari limbah kecambah; P4 : POC dari ampas tebu; P5 : POC dari limbah ikan lele; P6 : POC dari limbah darah sapi, dan P7 : POC dari campuran bahan 1 s/d 6; sedangkan perlakuan factor II adalah kosentrasi POC terdiri 3 level yaitu: K1: 0,3 % = 3 ml/liter larutan; K2: 0,6 % = 6 ml/liter larutan; dan K3: 0,9 % = 9 ml/liter larutan. Hasil penelitian menunjukkan tidak ada interaksi antara perlakuan jenis bahan baku POC dengan perlakuan konsentrasi POC pada semua variabel pertumbuhan dan hasil melon. Perlakuan faktor tunggal jenis bahan baku POC tidak berpengaruh nyata terhadap semua variabel , demikian juga perlakuan konsentrasi POC tidak berpengaruh nyata terhadap semua variabel percobaan. Secara nominal angka terlihat bahwa tanaman yang diberi POC lebih bagus dibandingkan dengan kontrol. Percobaan dengan tanaman melon perlu disiapkan lebih cermat lagi, khususnya dalam mengantisipasi variabilitas sifat dasar tanaman dan pengaruh faktor lingkungan. Penelitian aplikasi POC pada tanaman melon kisaran konsentrasi perlu diperlebar mulai konsentrasi 1% sampai dengan 25%.
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Steier, Peter, Roswitha Drosg, Mariaelenea Fedi, Walter Kutschera, Martin Schock, Dietmar Wagenbach, and Eva Maria Wild. "Radiocarbon Determination of Particulate Organic Carbon in Non-Temperated, Alpine Glacier Ice." Radiocarbon 48, no. 1 (2006): 69–82. http://dx.doi.org/10.1017/s0033822200035402.
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Dating ice samples from glaciers via radiocarbon is a challenge that requires systematic investigations. This work describes an approach for extraction and accelerator mass spectrometry (AMS) 14C analysis of the particulate organic carbon (POC) fraction in glacier ice samples. Measurements were performed at VERA (Vienna Environmental Research Accelerator) on ice samples obtained mainly from the non-temperated ablation zone of the Grenzgletscher (Grenz Glacier) system (Monte Rosa Massif, Swiss Alps). The samples were obtained from 2 sampling sites situated roughly on a common flow line. The sample masses used were between 0.3 and 1.4 kg of ice, yielding between 18 and 307 μg of carbon as POC. The carbon contamination introduced during sample processing varied between 5.4 and 33 μg C and originated mainly from the quartz filters and the rinsing liquids used in processing. Minimum sample sizes for successful graphitization of CO2 in our laboratory could be reduced to <10 μg carbon, with a background in the graphitization process of ∼0.5 μg of 40-pMC carbon. Evaluation of the whole procedure via 11 Grenzgletscher samples revealed a surprisingly large scatter of pMC values. We obtain a mean calibrated age of 2100 BC to AD 900 (95.4% confidence level), which is not significantly different for the 2 sampling sites. Discussions of these results suggest that single 14C dates of glacial POC are presently of limited significance. Future improvements with respect to analytical precision and sample characterization are proposed in order to fully explore the POC dating potential.
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Oktavianus, Angga, Hagai Jorenta Perangin-angin, Suryadi Risky Sirait, and Bayu Pratomo. "PENGARUH PEMBERIAN PUPUK ORGANIK CAIR (POC) LIMBAH TANDAN KOSONG KELAPA SAWIT (TKKS) TERHADAP PERTUMBUHAN Mucuna braceata D.C." Jurnal Agro Estate 6, no. 1 (June 30, 2022): 9–17. http://dx.doi.org/10.47199/jae.v6i1.232.
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Effect of OPEFB POC Application on Mucuna bracteata Seedling Growth. This study aims to determine the effect of application and dose level of EFB POC on the growth of Mucuna bracteata seedlings. This research was conducted from January to March using an experimental method with a Non-Factorial Randomized Block Design (RAK) with four replications and 7 levels of POC TKKS treatment: (P0) No POC TKKS treatment, (P1) 5 ml/polybad POC TKKS, ( P2) 10 ml/polybad POC TKKS, (P3) 15 ml/polybad POC TKKS, (P4) 20ml/polybad POC TKKS, (P5) 25 ml/polybad POC TKKS, (P6) 30 ml/polybad POC TKKS. Research data were analyzed using analysis of variance (Analysis of variance) and Tuckey's advanced test at 5% level. The results showed that giving POC OPEFB to the growth of Mucuna bracteata seedlings had a significant effect on the growth of tendril length and number of leaves.
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Angga Oktavianus, Hagai Jorenta Perangin-angin, Suryadi Risky Sirait, and Bayu Pratomo. "PENGARUH PUPUK ORGANIK CAIR (POC) LIMBAH TANDAN KOSONG KELAPA SAWIT (TKKS) TERHADAP PERTUMBUHAN Mucuna Braceata.D.C." Jurnal Agro Estate 6, no. 1 (June 30, 2022): 9–17. http://dx.doi.org/10.47199/jae.v6i1.96.
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Effect of OPEFB POC Application on Mucuna bracteata Seedling Growth. This study aims to determine the effect of application and dose level of EFB POC on the growth of Mucuna bracteata seedlings. This research was conducted from January to March using an experimental method with a Non-Factorial Randomized Block Design (RAK) with four replications and 7 levels of POC TKKS treatment: (P0) No POC TKKS treatment, (P1) 5 ml/polybad POC TKKS, ( P2) 10 ml/polybad POC TKKS, (P3) 15 ml/polybad POC TKKS, (P4) 20ml/polybad POC TKKS, (P5) 25 ml/polybad POC TKKS, (P6) 30 ml/polybad POC TKKS. Research data were analyzed using analysis of variance (Analysis of variance) and Tuckey's advanced test at 5% level. The results showed that giving POC OPEFB to the growth of Mucuna bracteata seedlings had a significant effect on the growth of tendril length and number of leaves.
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Gustiani, Silvi. "KOMBINASI POC SABUT KELAPA DAN NPK TERHADAP PERTUMBUHAN DAN HASIL TANAMAN CABAI MERAH (Capsicum annum L.)." Agrivet : Jurnal Ilmu-Ilmu Pertanian dan Peternakan (Journal of Agricultural Sciences and Veteriner) 9, no. 2 (December 29, 2021): 206–12. http://dx.doi.org/10.31949/agrivet.v9i2.1804.
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Salah satu strategi efisiensi dalam budidaya sayuran adalah menekan biaya produksi pada setiap usaha taninya dengan menggunakan pupuk yang tepat dan sesuai dengan kebutuhan optimal. Salah satu upaya pemupukan berimbang menggunakan Kombinasi POC sabut kelapa dan NPK. Penelitian ini bertujuan untuk menganalisis kombinasi POC sabut kelapa dan NPK terhadap pertumbuhan dan hasil tanaman cabai merah (Capsicum annuum L.). Penelitian ini dilaksanakan pada bulan april sampai bulan agustus 2020 di desa kertabasuki, kecamatan maja, kabupaten majalengka. Penelitian ini menggunakan rancangan acak kelompok (RAK) non faktorial dengan sembilan perlakuan dengan tiga kali ulangan. Faktor kombinasi pupuk yang diaplikasikan yaitu : A (0 ml POC + 0g NPK), B (50 ml POC + 5g NPK), C (50 ml POC + 0g NPK), D (100 ml POC + 5g NPK), E (100 ml POC + 0g NPK), F (150 ml POC + 5g NPK), G (150 ml POC + 0g NPK), H (200 ml POC + 5g NPK) dan I (200 ml POC + 0g NPK). Hasil penelitian menunjukan bahwa kombinasi POC sabut kelapa dan NPK berpengaruh nyata pada pertumbuhan dan hasil tanaman cabai. Kombinasi 200 ml POC tanpa NPK memberikan hasil terbaik pada tinggi tanaman 9 mst diameter dan bobo buah cabai.
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Christina, Chyntia, Rama R Sitinjak, and Bayu Pratomo. "Pengaruh Tingkat Kematangan Pupuk Organik Cair (POC) Kulit Semangka (Citrullus Vulgaris Schard.) Terhadap Pembibitan Kelapa Sawit (Elaeis Guineensis jacq.) di pre nursery." Jurnal Indonesia Sosial Teknologi 2, no. 7 (July 21, 2021): 1123–33. http://dx.doi.org/10.36418/jist.v2i7.197.
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Tujuan penelitian ini untuk mengetahui konsentrasi terbaik dari pemberian POC kulit semangka (Citrullus vulgaris Schard.) terhadap pembibitan kelapa sawit, mengetahui tingkat kematangan terbaik POC kulit semangka (Citrullus vulgaris Schard.) yang optimal untuk pertumbuhan bibit kelapa sawit, dan mengetahui pengaruh interaksi antara pemberian POC kulit semangka dengan tingkat kematangan POC kulit semangka (Citrullus vulgaris Schard.) terhadap pertumbuhan bibit kelapa sawit. Penelitian ini dilaksanakan di area Pertanaman Masyarakat di Martubung. Metode yang digunakan adalah metode eksperimental dengan menggunakan Rancangan Acak Kelompok (RAK) 2 Faktorial. Faktor I adalah tingkat kematangan POC kulit semangka dengan 3 taraf yaitu : T0 = 0 hari, T1 = 2 minggu, dan T2 = 4 minggu. Faktor II adalah konsentrasi POC kulit semangka dengan 4 taraf yaitu : K1 = 5%, K2 = 10%, K3 = 20%, dan K4 = 40%. Data hasil pengamatan dianalisis dengan Analysis of Variance (ANOVA). Berdasarkan hasil dan pembahasan dapat disimpulkan bahwa tingkat kematangan, konsentrasi, dan interaksi POC kulit semangka tidak berpengaruh positif terhadap tinggi bibit, namun POC kulit semangka dapat meningkatkan pertumbuhan tinggi bibit kelapa sawit di pre nursery dan pertumbuhan tinggi bibit yang terbaik ada pada perlakuan T2K3 (dengan tingkat kematangan POC kulit semangka umur 4 minggu dan dosis POC kulit semangka 20%) dengan rataan 20,61 cm. Tingkat kematangan, konsentrasi, dan interaksi POC kulit semangka juga tidak berpengaruh positif terhadap diameter batang, namun POC kulit semangka dapat meningkatkan ukuran diameter batang bibit kelapa sawit di pre nursery dan diameter batang yang terbaik ada pada perlakuan T0K1 (dengan tingkat kematangan POC kulit semangka 0 hari dan dosis POC kulit semangka 5%) dengan rataan 6,54 cm. Tingkat kematangan, konsentrasi, dan interaksi POC kulit semangka juga tidak berpengaruh positif terhadap jumlah daun, namun POC kulit semangka dapat meningkatkan jumlah daun bibit kelapa sawit di pre nursery dan pertumbuhan jumlah daun yang terbaik ada pada perlakuan T0K1 (dengan tingkat kematangan POC kulit semangka 0 hari dan dosis POC kulit semangka 5%) dengan rataan 2,78 cm.
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Anastasya, Allisa, and Sudiarso Sudiarso. "Pengaruh Jenis dan Konsentrasi Pupuk Organik Cair (POC) terhadap Pertumbuhan dan Hasil Tanaman Bunga Kol (Brassica oleracea var. botrytis L.)." Produksi Tanaman 010, no. 10 (October 28, 2022): 581–89. http://dx.doi.org/10.21776/ub.protan.2022.010.10.07.
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Tanaman bunga kol banyak digemari oleh masyarakat Indonesia. Penggunaan pupuk kimia dapat mengancam keseimbangan ekosistem dan menurunkan kesuburan tanah. Upaya dalam mengurangi penggunaan pupuk kimia yaitu dengan menggunakan pupuk organik cair. Penelitian ini untuk mengetahui, mengukur dan menganalisis pemberian jenis dan konsentrasi pupuk organik cair yang berbeda untuk meningkatkan pertumbuhan dan hasil bunga kol. Bahan yang digunakan yaitu pupuk ZA, pupuk SP-36, pupuk KCl, air, benih bunga kol varietas PM 126 F1, pupuk kandang kambing, POC Nasa, POC Green Tonik dan POC Bio Sugih. Penelitian ini menggunakan rancangan acak kelompok (RAK) dengan kombinasi perlakuan P1: POC Nasa 1 ml/l Air, P2: POC Nasa 2 ml/l Air, P3: POC Nasa 3 ml/l Air, P4: POC Green Tonik 1 ml/l Air, P5: POC Green Tonik 2 ml/l Air, P6: POC Green Tonik 3 ml/l Air, P7: POC Bio Sugih 1 ml/l Air, P8: POC Bio Sugih 2 ml/l Air, P9: POC Bio Sugih 3 ml/l Air. Penelitian dilaksanakan pada bulan Februari hingga April 2022 di Lahan Percobaan Fakultas Pertanian Universitas Brawijaya, Kelurahan Jatimulyo, Jawa Timur. Hasil penelitian menunjukkan bahwa Jenis dan konsentrasi POC Green Tonik 3 ml/l memberikan hasil terbaik terhadap pertumbuhan dan hasil tanaman bunga kol. Pemberian POC Green Tonik 3 ml/l menghasilkan panen bunga kol per hektar sebesar 15,67 t ha-1 atau lebih tinggi 56,7% dibandingkan POC Green Tonik 1 ml/l.
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Mazarrasa, I., N. Marbà, C. E. Lovelock, O. Serrano, P. S. Lavery, J. W. Fourqurean, H. Kennedy, et al. "Seagrass meadows as a globally significant carbonate reservoir." Biogeosciences 12, no. 16 (August 24, 2015): 4993–5003. http://dx.doi.org/10.5194/bg-12-4993-2015.
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Abstract. There has been growing interest in quantifying the capacity of seagrass ecosystems to act as carbon sinks as a natural way of offsetting anthropogenic carbon emissions to the atmosphere. However, most of the efforts have focused on the particulate organic carbon (POC) stocks and accumulation rates and ignored the particulate inorganic carbon (PIC) fraction, despite important carbonate pools associated with calcifying organisms inhabiting the meadows, such as epiphytes and benthic invertebrates, and despite the relevance that carbonate precipitation and dissolution processes have in the global carbon cycle. This study offers the first assessment of the global PIC stocks in seagrass sediments using a synthesis of published and unpublished data on sediment carbonate concentration from 403 vegetated and 34 adjacent un-vegetated sites. PIC stocks in the top 1 m of sediment ranged between 3 and 1660 Mg PIC ha−1, with an average of 654 ± 24 Mg PIC ha−1, exceeding those of POC reported in previous studies by about a factor of 5. Sedimentary carbonate stocks varied across seagrass communities, with meadows dominated by Halodule, Thalassia or Cymodocea supporting the highest PIC stocks, and tended to decrease polewards at a rate of −8 ± 2 Mg PIC ha−1 per degree of latitude (general linear model, GLM; p < 0.0003). Using PIC concentrations and estimates of sediment accretion in seagrass meadows, the mean PIC accumulation rate in seagrass sediments is found to be 126.3 ± 31.05 g PIC m−2 yr−1. Based on the global extent of seagrass meadows (177 000 to 600 000 km2), these ecosystems globally store between 11 and 39 Pg of PIC in the top metre of sediment and accumulate between 22 and 75 Tg PIC yr−1, representing a significant contribution to the carbonate dynamics of coastal areas. Despite the fact that these high rates of carbonate accumulation imply CO2 emissions from precipitation, seagrass meadows are still strong CO2 sinks as demonstrated by the comparison of carbon (PIC and POC) stocks between vegetated and adjacent un-vegetated sediments.
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Aziza, Ismi, Yuni Sri Rahayu, and Sari Kusuma Dewi. "Pengaruh Pupuk Organik Cair dengan Penambahan Silika dan Cekaman Air terhadap Pertumbuhan Tanaman Kedelai." LenteraBio : Berkala Ilmiah Biologi 11, no. 1 (November 30, 2021): 183–91. http://dx.doi.org/10.26740/lenterabio.v11n1.p183-191.
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Azolla dan air cucian beras merupakan bahan alami yang memiliki kandungan hara NPK tinggi dan banyak digunakan dalam pupuk organik cair (POC). Tujuan penelitian ini untuk mengetahui kadar unsur hara NPK POC Azolla dan air cucian beras yang ditambahkan silika serta mengetahui konsentasi optimal yang berpengaruh terhadap pertumbuhan tanaman kedelai varietas anjasmoro pada kondisi tercekam air. Penelitian ini terbagi menjadi dua tahapan yakni tahap I penelitian deskriptif dan tahap II penelitian eksperimental. Tahap I meliputi proses pembuatan POC dan pengujian kandungan unsur hara NPK, sedangkan tahap II meliputi pengujian POC terhadap pertumbuhan kedelai var. Anjasmoro. Rancangan penelitian berupa Rancangan Acak Kelompok (RAK) dua faktor yaitu konsentrasi POC (POC tanpa Si, POC 5 ml + Si, POC 10 ml + Si, dan POC 15 ml + Si) dan tingkat cekaman air (yaitu kapasitas lapang 75%, 50% dan 25%). Data dianalisis dengan Two Way ANOVA lalu dilanjutkan pada uji Duncan. POC memiliki kandungan hara nitrogen 0,006%, fosfor 0,01%, kalium 0,0003% dan rasio C/N 28. Hasil penelitian menunjukkan adanya interaksi antara konsentrasi POC dan tingkat cekaman air yang berpengaruh secara signifikan terhadap panjang akar, kadar air relatif daun dan kerapatan stomata, sedangkan pada parameter tinggi tanaman, jumlah daun dan berat basah tanaman tidak berpengaruh siginifikan mengenai interaksi antara konsentrasi POC dan tingkat cekaman air. Konsentrasi POC terbaik yang direkomendasikan yakni 15 ml POC + 0,85 g silika dengan tingkat kapasitas lapang 75%.
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Scheingross, Joel S., N. Hovius, M. Dellinger, R. G. Hilton, M. Repasch, D. Sachse, D. R. Gröcke, A. Vieth-Hillebrand, and J. M. Turowski. "Preservation of organic carbon during active fluvial transport and particle abrasion." Geology 47, no. 10 (August 30, 2019): 958–62. http://dx.doi.org/10.1130/g46442.1.
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Abstract Oxidation of particulate organic carbon (POC) during fluvial transit releases CO2 to the atmosphere and can influence global climate. Field data show large POC oxidation fluxes in lowland rivers; however, it is unclear if POC losses occur predominantly during in-river transport, where POC is in continual motion within an aerated environment, or during transient storage in floodplains, which may be anoxic. Determination of the locus of POC oxidation in lowland rivers is needed to develop process-based models to predict POC losses, constrain carbon budgets, and unravel links between climate and erosion. However, sediment exchange between rivers and floodplains makes differentiating POC oxidation during in-river transport from oxidation during floodplain storage difficult. Here, we isolated in-river POC oxidation using flume experiments transporting petrogenic and biospheric POC without floodplain storage. Our experiments showed solid phase POC losses of 0%–10% over ∼103 km of fluvial transport, compared to ∼7% to >50% losses observed in rivers over similar distances. The production of dissolved organic carbon (DOC) and dissolved rhenium (a proxy for petrogenic POC oxidation) was consistent with small POC losses, and replicate experiments in static water tanks gave similar results. Our results show that fluvial sediment transport, particle abrasion, and turbulent mixing have a minimal role on POC oxidation, and they suggest that POC losses may accrue primarily in floodplain storage.
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Huang, Changchun, Quanliang Jiang, Ling Yao, Hao Yang, Chen Lin, Tao Huang, A.-Xing Zhu, and Yimin Zhang. "Variation pattern of particulate organic carbon and nitrogen in oceans and inland waters." Biogeosciences 15, no. 6 (March 29, 2018): 1827–41. http://dx.doi.org/10.5194/bg-15-1827-2018.
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Abstract. We examined the relationship between, and variations in, particulate organic carbon (POC) and particulate organic nitrogen (PON) based on previously acquired ocean and inland water data. The latitudinal dependency of POC ∕ PON is significant between 20 and 90∘ N but weak in low-latitude areas and in the Southern Hemisphere. The mean values of POC ∕ PON in the Southern Hemisphere and Northern Hemisphere were 7.40±3.83 and 7.80±3.92, respectively. High values of POC ∕ PON appeared between 80–90 (12.2±7.5) and 70–80∘ N (9.4±6.4), while relatively low POC ∕ PON was found from 20 (6.6±2.8) to 40∘ N (6.7±2.7). The latitudinal variation of POC ∕ PON in the Northern Hemisphere is much stronger than in the Southern Hemisphere due to the influence of more terrestrial organic matter. Higher POC and PON could be expected in coastal waters. POC ∕ PON growth ranged from 6.89±2.38 to 7.59±4.22 in the Northern Hemisphere, with an increasing rate of 0.0024 km from the coastal to open ocean. Variations of POC ∕ PON in lake water also showed a similar latitude-variation tendency of POC ∕ PON with ocean water but were significantly regulated by the lakes' morphology, trophic state and climate. Small lakes and high-latitude lakes prefer relatively high POC ∕ PON, and large lakes and low-latitude lakes tend to prefer low POC ∕ PON. The coupling relationship between POC and PON in oceans is much stronger than in inland waters. Variations in POC, PON and POC ∕ PON in inland waters should receive more attention due to the implications of these values for the global carbon and nitrogen cycles and the indeterminacy of the relationship between POC and PON.
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Ishak, Rizaldi Natsir, Kasifah Kasifah, and Amanda Patappari Firmansyah. "RESPON TANAMAN PAKCOY TERHADAP PEMBERIAN POC REBUNG DAN MEDIA TANAM PADA HIDROPONIK SISTEM WICK." Agroplantae: Jurnal Ilmiah Terapan Budidaya dan Pengelolaan Tanaman Pertanian dan Perkebunan 13, no. 1 (March 31, 2024): 18–29. http://dx.doi.org/10.51978/agro.v13i1.773.
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Pupuk organik cair (POC) adalah larutan hasil pembusukan bahan organik yang mengandung banyak unsur hara. Selain POC, media tanam organik seperti arang, cocopeat dan serbuk gergaji diketahui bagi pertumbuhan tanaman. Penelitian ini bertujuan untuk mengetahui respon pertumbuhan tanaman pakcoy (Brassica rapa L.) pada setiap konsentrasi POC rebung bambu dan penggunaan jenis media tanam, serta interaksi antara keduanya. Penelitian ini disusun menggunakan rancangan acak kelompok (RAK), yang terdiri dari 2 faktor perlakuan yaitu POC dan media tanam. Perlakuan POC terdiri atas 4 dosis yaitu; 0ml POC/100 ml air (D0), 20ml POC/100ml air (D1), 40ml POC/100ml air (D2) dan 60ml POC/100ml air (D3). Sedangkan media tanam diaplikasikan menggunakan arang sekam (M1), serbuk gergaji (M2) dan cocopeat (M3). Hasil penelitian menunjukkan bahwa POC rebung bambu 60ml/100ml (D3) memberikan tinggi tanaman dan jumlah daun tertinggi dibandingkan perlakuan lainnya, sedangkan media yang terbaik untuk tanaman pakcoy adalah cocopeat dan arang sekam.
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Yeni Ika Pratiwi, Nurul Huda, and Eko Wahono. "Effect of Giving Organic Waste-Based Poc To The Growth of Kailan Plants (Brassica Oleracea L)." Agricultural Science 5, no. 2 (March 29, 2022): 136–42. http://dx.doi.org/10.55173/agriscience.v5i2.75.
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This study combined the use of variable doses of liquid organic fertilizers made from organic waste, wich a Factorial experimental study that uses a Randomized Group Design (RAK) consisting of 2 treatment factors. Factor I treatment is a type of POC raw material consisting of 7 levels: P0= Comparison without the provision of liquid organic fertilizer, but given basic fertilizer; P1= Given POC made from a mixture of materials 2 to 7; P2=Given POC made from vegetable waste (tomatoes and mustard); P3= Given POC made from waste fruits (bananas and papaya); P4= Given POC made from germinated waste; P5= Given POC made from waste food catering; P6= Given POC made from catfish waste; P7= Given POC made from animal slaughterhouse waste (cow's blood). The treatment of Factor II is the concentration of POC giving includes 3 levels, namely: K1= POC concentration of 4%=40 ml/ liter of solution; K2= POC concentration of 8%=80 ml/liter solution; K3= POC concentration of 12%=120 ml/liter of solution. The parameters of observations made on kailan plants include: the number and length of the plant. By comparing the concentration treatment of K1, K2 and K3 mentioned above, the K2 treatment (concentration of 8% POC) exerts a better influence than the treatment of K1 and K3, although it is not real from the K3 treatment. This shows that the use of POC made from organic waste with a concentration of 8% POC provides a significant influence that can play a role in increasing soil fertility and plant productivity.
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Kasturi, Ika, Bambang Budi Santoso, and Dwi Ratna Anugrahwati. "Pertumbuhan Dan Hasil Tanaman Pakcoy (Brassica rapa L.) Pada Berbagai Kombinasi Nutrisi Tanaman Sistem Hidroponik." Jurnal Ilmiah Mahasiswa Agrokomplek 1, no. 2 (July 24, 2022): 113–21. http://dx.doi.org/10.29303/jima.v1i2.1443.
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Penelitian bertujuan mengetahui pertumbuhan dan hasil tanaman pakcoy (Brassica rapa L.) pada berbagai kombinasi konsentrasi AB-Mix dan pupuk organik cair (POC) kelinci sebagai nutrisi tanaman sistem hidroponik. Penelitian dilaksanakan pada Februari 2022 - Maret 2022 di Screen House Kelurahan Pagesangan, Kota Mataram. Percobaan dirancang secara acak lengkap dengan taraf perlakuan AB-mix 100% + POC Kelinci 0%, AB-mix 75% + POC Kelinci 25%, AB-mix 50% + POC Kelinci 50%, AB-mix 25% + POC Kelinci 75%, dan AB-mix 0% + POC Kelinci 100%. Perlakuan diulang sebanyak 4 kali, dan dalam 1 unit percobaan terdapat 6 tanaman sehingga diperoleh 120 unit percobaan. Data dianalisis menggunakan ANOVA dan BNJ pada taraf 5%. Hasil penelitian menunjukkan bahwa terdapat pengaruh nyata kombinasi konsentrasi AB-Mix dan POC kelinci terhadap pertumbuhan dan hasil tanaman pakcoy. Pemberian AB Mix 100% tanpa campuran POC, AB Mix 75% dan POC kelinci 25%, AB Mix 50% dan POC kelinci 50% serta AB Mix 25% dan POC kelinci 75% memberikan pengaruh terbaik terhadap tinggi tanaman, jumlah daun, panjang akar, diameter batang tanaman, bobot basah total tanaman, bobot segar konsumsi tanaman, dan bobot kering tanaman.
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Hamim, Jihan Angraini, Hayatiningsih Gubali, and Fitriah S. Jamin. "ANALISIS PERTUMBUHAN TANAMAN KACANG HIJAU (Vigna radiata L.) PADA PEMBERIAN BEBERAPA JENIS PUPUK ORGANIK CAIR." Jurnal Lahan Pertanian Tropis (JLPT) 1, no. 2 (January 31, 2023): 10–16. http://dx.doi.org/10.56722/jlpt.v1i2.17655.
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Penggunaan pupuk anorganik dalam jangka waktu yang panjang dapat menyebabkan degradasi lahan sehingga dapat menurunkan produksi tanaman, mengatasi hal tersebut diberikan pupuk organik yang ramah lingkungan.Tujuan penelitian untuk mengetahui pengaruh pertumbuhan tanaman kacang hijau pada pemberian beberapa jenis POC dan untuk melihat POC yang sesuai pada pertumbuhan tanaman kacang hijau. Penelitiandilaksanakan di Dusun Topolo, DesaDatahu, KecamatanTibawa, Kabupaten Gorontalo, Provinsi Gorontalo pada bulan Oktober sampai Desember 2019. Penelitian ini menggunakan Rancangan Acak Kelompok Faktorial (RAKF) dengan 2 faktor yaitu faktor pertama jenis POC hewani terdiri dari tiga taraf yaitu: tanpa POC, urin sapi dan urin kelinci. Faktor kedua POC nabati: tanpa POC, bonggol pisang, limbah tahu. Analisis data menggunakan ANAVA dengan uji BNT 5%.Hasil penelitian menunjukkan bahwa POC hewani yang berpengaruh pada pertumbuhan kacang hijau adalah POC urin kelinci, ditunjukan oleh luas daun, laju pertumbuhan relative dan bobot 100 biji.POC nabati yang berpengaruh pada pertumbuhan kacang hijau adalah POC limbah tahu, ditunjukan oleh luas daun, bobot 100 biji, dan jumlah polong.Kata Kunci: Kacang Hijau, POC hewani, POC nabati
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Noviyanti, Vilda, Abdul Haris, and Maimuna Nontji. "RESPON PERTUMBUHAN DAN PRODUKSI TANAMAN TERUNG UNGU (Solanum melongena L.) TERHADAP BERBAGAI KONSENTRASI DAN WAKTU PEMBERIAN POC MOL LIMBAH IKAN NILA (Oreochromis niloticus)." AGrotekMAS Jurnal Indonesia: Jurnal Ilmu Peranian 2, no. 1 (April 29, 2021): 44–53. http://dx.doi.org/10.33096/agrotekmas.v2i1.142.
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Growth and Production Response of Purple Eggplant (Solanum melongena L.) Against Various Concentrations and Time of Giving POC MOL Tilapia Waste (Oreochromis niloticus). Supervised by Haris and Maimuna. This study aims to determine the effect of concentrations of liquid organic fertilizer for local microorganisms of tilapia waste and the time of administration on purple eggplant plants. This study was prepared using a randomized block design (RBD) method, a factorial pattern consisting of two factors with 16 treatment combinations, each treatment being repeated 3 times so that there were 48 experimental units. Factor 1: MOL POC Concentration of Fish Waste, P0: Without POC (control), P1: POC 3.5% = 35 ml POC in 1000 ml, P2: POC 4% = 40 ml POC in 1000 ml and P3: POC 4 , 5% = 45 ml POC in 1000 ml. Factor II: Time of Giving POC MOL Tilapia Waste, W1: Giving POC MOL 3 days after planting, W2: Giving POC MOL 5 days after planting, W3: Giving POC MOL 7 days after planting and W4: Giving POC MOL 9 days after planting . The results showed that the average plant height and number of leaves that tended to be high were shown by P0W4, while the average fruit weight, fruit diameter and fruit production tended to be high, namely P2W3, the average length of the fruit which tended to be high was P3W1 and The average number of fruits that tends to be high is P1W3.
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Cuevas-Lara, Daniel, Javier Alcocer, Daniela Cortés-Guzmán, Ismael F. Soria-Reinoso, Felipe García-Oliva, Salvador Sánchez-Carrillo, and Luis A. Oseguera. "Particulate Organic Carbon in the Tropical Usumacinta River, Southeast Mexico: Concentration, Flux, and Sources." Water 13, no. 11 (May 31, 2021): 1561. http://dx.doi.org/10.3390/w13111561.
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Particulate organic carbon (POC) derived from inland water plays an important role in the global carbon (C) cycle; however, the POC dynamic in tropical rivers is poorly known. We assessed the POC concentration, flux, and sources in the Usumacinta, the largest tropical river in North America, to determine the controls on POC export to the Gulf of Mexico. We examined the Mexican middle and lower Usumacinta Basin during the 2017 dry (DS) and rainy (RS) seasons. The POC concentration ranged from 0.48 to 4.7 mg L−1 and was higher in the RS, though only in the middle basin, while remaining similar in both seasons in the lower basin. The POC was predominantly allochthonous (54.7 to 99.6%). However, autochthonous POC (phytoplankton) increased in the DS (from 5.1 to 17.7%) in both basins. The POC mass inflow–outflow balance suggested that floodplains supply (C source) autochthonous POC during the DS while retaining (C sink) allochthonous POC in the RS. Ranging between 109.1 (DS) and 926.1 t POC d−1 (RS), the Usumacinta River POC export to the Gulf of Mexico was similar to that of other tropical rivers with a comparable water discharge. The extensive floodplains and the “Pantanos de Centla” wetlands in the lowlands largely influenced the POC dynamics and export to the southern Gulf of Mexico.
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Hendarto, Kus, Ria Maizal, Fitri Yelli, and Sri Ramadiana. "APLIKASI PUPUK ORGANIK CAIR TERHADAP PERTUMBUHAN DAN PRODUKSI TOMAT RAMPAI (Lycopersicon pimpinellifolium)." Jurnal Agrotek Tropika 10, no. 4 (November 12, 2022): 593. http://dx.doi.org/10.23960/jat.v10i4.6466.
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Penelitian ini bertujuan untuk mengetahui pengaruh jenis dan konsentrasi POC serta mengatahui pengaruh jenis POC terhadap pertumbuhan dan produksi tomat rampai bergantung pada penambahan konsentrasi POC. Penelitian ini menggunakan rancangan acak kelompok (RAK) faktorial (2 x 4) dengan tiga ulangan sebagai kelompok. Faktor pertama yaitu jenis POC dan faktor kedua yaitu konsentrasi POC. Penelitian ini diuji dengan uji Bartlett (homogenitas) dan uji Tukey (additivitas) yang kemudian dilakukan analisis ragam (uji F), dilanjutkan pemisahan nilai tengah menggunakan BNT dengan taraf nyata 5%. Hasil penelitian menunjukkan jenis POC kulit pisang lebih baik daripada POC kotoran kambing pada variabel pengamatan jumlah, diameter buah, dan berat kering brangkasan. Semakin tinggi konsentrasi POC hingga 120 ml/l air akan meningkatkan pertumbuhan dan produksi tomat rampai pada variabel pengamatan tinggi tanaman, jumlah daun, cabang produktif, berat buah, jumlah buah, diameter buah, berat basah brangkasan, dan berat kering brangkasan. Pengaruh jenis POC bergantung terhadap pemberian konsentrasi POC terjadi pada variabel pengamatan tinggi tanaman.
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Hakim, Muhammad Ronny, Jumar Jumar, and Untung Santoso. "PENGARUH PEMBERIAN BERBAGAI KONSENTRASI POC-PLUS TERHADAP SERANGAN HAMA KEDELAI EDAMAME." Jurnal Hama dan Penyakit Tumbuhan 10, no. 4 (December 2022): 187–93. http://dx.doi.org/10.21776/ub.jurnalhpt.2022.010.4.4.
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Penelitian ini bertujuan untuk mengetahui pengaruh pemberian konsentrasi POC-Plus terhadap serangan hama kedelai edamame dan mengetahui konsentrasi POC-Plus terbaik yang dapat mengakibatkan serangan hama kedelai edamame paling rendah. Penelitian dilaksanakan pada bulan November 2021 hingga Maret 2022 di Lahan Pertanian Pondok Pesantren Nurul Muhibbin, Kecamatan Binjai Punggal, Kabupaten Balangan, Kalimantan Selatan. Penelitian dilaksanakan dengan Rancangan Acak Kelompok (RAK) yang terdiri atas lima perlakuan konsentrasi POC-Plus, yakni k0 = tanpa pemberian POC-Plus (kontrol), k1 = POC-Plus 50 ml L-1 air, k2 = POC-Plus 100 ml L-1 air, k3 = POC-Plus 150 ml L-1 air dan k4 = POC-Plus 200 ml L-1 air. Hasil penelitian menunjukkan pemberian berbagai konsentrasi POC-Plus berpengaruh sangat nyata, dimana pemberian POC-Plus sebanyak 100 ml L-1 air merupakan konsentrasi terbaik dengan tingkat serangan hama berkategori sedang, baik terhadap variabel intensitas serangan hama perusak daun (36,66%; 46,89%; 50,28%) dan persentase polong terserang (22,34%; 37,44%).
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Andriana, Benedicta Gaby, Fitri Kusnayanti, Bagas Andhika Sumarsono, and Nurul Azizah. "SOSIALISASI PEMBUATAN (POC) PUPUK ORGANIK CAIR MENGGUNAKAN LIMBAH BATANG PISANG DI KELURAHAN JEMUR WONOSARI KOTA SURABAYA." Jurnal Penamas Adi Buana 6, no. 01 (July 20, 2022): 53–62. http://dx.doi.org/10.36456/penamas.vol6.no01.a5700.
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Di wilayah kelurahan Jemur Wonosari memiliki potensi pertanian yang sangat berkembang misalnya tanaman hidroponik yang sudah maju serta terdapat sayur dan buah yang juga ditanam di wilayah Kelurahan Jemur Wonosari, seperti pisang, dan beberapa tanaman buah lainnya. Dari beberapa tanaman tersebut batang pisang bisa dimanfaatkan sebagai POC (Pupuk Organik Cair) untuk merangsang pertumbuhan buah dan biji yang digunakan pada pertanian di Jemur Wonosari. Kegiatan sosialisasi tentang POC (Pupuk Organik Cair) ini bertujuan memberikan pemahaman kepada POKTAN dan masyarakat terkait pemanfaatan limbah batang pisang menjadi lebih bermanfaat untuk sektor pertanian Metode yang digunakan dalam sosialisasi pembuatan POC (Pupuk Organik Cair) oleh mahasiswa KKNT Kelompok 57 2022 di kelurahan Jemur Wonosari dibagi menjadi empat tahap yaitu observasi, diskusi, percobaan, dan pelaksanaan kegiatan. POC (Pupuk Organik Cair) dibuat dari sisa tanaman berikut alat dan bahan yang digunakan yaitu batang pisang, gula atau molase, EM4 atau MOL, air bersih dan ember kapasitas 20L. Partisipan kegiatan soasialisasi ini dihadiri oleh 15 orang terdiri dari Kelompok Tani Mina Sari yang berjumlah 4 orang, dosen pendamping lapangan, PIC, dan anggota kelompok yang terdiri dari 9 orang. Hasil kegiatan sosialisasi ini berdampak positif bagi POKTAN dan masyarakat sekitar karena dapat meningkatkan keterampilan untuk memanfaatkan limbah disekitar dapat membuat pupuk organik.