Tesis sobre el tema "Long-term fate"
Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros
Consulte los 31 mejores tesis para su investigación sobre el tema "Long-term fate".
Junto a cada fuente en la lista de referencias hay un botón "Agregar a la bibliografía". Pulsa este botón, y generaremos automáticamente la referencia bibliográfica para la obra elegida en el estilo de cita que necesites: APA, MLA, Harvard, Vancouver, Chicago, etc.
También puede descargar el texto completo de la publicación académica en formato pdf y leer en línea su resumen siempre que esté disponible en los metadatos.
Explore tesis sobre una amplia variedad de disciplinas y organice su bibliografía correctamente.
You, Sijun. "Long-term fate of non-neuronal cells in denervated nerve stumps". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1995. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq22046.pdf.
Texto completoFathordoobadi, Sahar. "Long Term Impact of Biomineralization in Arsenic Fate Under Simulated Landfill Conditions". Diss., The University of Arizona, 2014. http://hdl.handle.net/10150/333208.
Texto completoJacquat, Olivier. "Long-term fate of zinc in contaminated soils : zinc speciation by synchrotron spectroscopy and chemical extractions /". Zürich : ETH, 2008. http://opac.nebis.ch/cgi-bin/showAbstract.pl?sys=000259330.
Texto completoAutret, Bénédicte. "Quantification and modelling of carbon and nitrogen fate in alternative cropping systems experiments on the long term". Thesis, Paris, Institut agronomique, vétérinaire et forestier de France, 2017. http://www.theses.fr/2017IAVF0023/document.
Texto completoAgricultural activities can lead to imbalanced carbon (C) and nitrogen (N) dynamics compared to natural terrestrial eco-systems, causing potential damages for soil, water and air quality. Among these prejudices, decreased soil C and N stocks, increased nitrate leaching in waters and gaseous N emissions towards the atmosphere are of a major concern. To reduce these environmental impacts, innovative and sustainable farming systems are promoted, such as low inputs cropping systems, “conservation” agriculture or organic farming. The objectives of this work were i) to quantify the long term impact of different alternative cropping systems on the fate of C and N in the soil-plantatmosphere system and ii) to simulate C and N dynamics with the agro-environmental model STICS. For this purpose, we studied three long-term field trials: the experiment of La Cage (France) established in 1998, the DOK (Switzerland) started in 1978 and the Foulum Organic (Denmark) established in 1998. The methodological approach combined experimentation and modelling. While La Cage trial enabled an in situ quantification of soil organic C and N storage, N leaching, nitrous oxide (N2O) emissions and greenhouse gas (GHG) balance in alternative cropping systems compared to conventional, the Swiss and Danish experiments were used for in silico estimation of the C and N fates in organic cropping systems, after adaptation of the STICS model, followed by calibration and evaluation of the model. Significant annual SOC and SON accumulation was found under conservation agriculture and organic farming at La Cage, whereas no significant change was observed in the low input and the conventional systems. No difference of specific SOC and SON mineralization rates was found between systems in vitro or in silico : we conclude that the higher C and N storage in soil observed in the conservation and organic systems was mainly driven by increased crop residues, rather than by the effect of no tillage practiced in conservation agriculture. The N surplus, i.e. the difference between N inputs and N exports at the field scale, varied widely between treatments. The fate of this N surplus also varied between systems with wide variations in SON storage and gaseous losses but no differences in N leaching. The cumulative N2O emissions measured continuously for three years were highly correlated with the calculated gaseous N losses (volatilization and denitrification), with higher losses in the conservation system. These calculations allowed establishing a full GHG balance. Therefore the four agricultural systems dissimilarly impacted the N fate, which could not be predicted by the N surplus alone. The GHG balance is a much better indicator of the environmental impact of cropping systems relative to C and N fluxes. In the Danish and Swiss experiments, the soil-crop model STICS was used to mimic crop production, N uptake and N surplus. The model was first adapted and evaluated to simulate organic farming systems. The model could satisfactorily simulate crop production, N uptake, N surplus and SON storage in the organic and conventional systems of these two longterm experiments. Model outputs suggested that the N fate could be contrasted according to fertilization and crop management, and that N losses were not systematically reduced in organic compared to conventional cropping systems. This study challenges the frequent belief that alternative cropping systems systematically improve the global C and N environmental impacts of agriculture
Sanders, Gordon. "Long-term temporal trends of PCBs and PAHs in the environment and their fate and behaviour in lacustrine systems". Thesis, Lancaster University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385671.
Texto completoBergkvist, Petra. "Long-term fate of sewage-sludge derived cadmium in arable soils : laboratory and field experiments, and modelling with SLAM and WHAM /". Uppsala : Dept. of Soil Sciences, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/a410.pdf.
Texto completoBogle, Ryan Heath. "Beyond Instability: How Do Children Fare in Long-Term Cohabiting Unions?" Bowling Green State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1277143411.
Texto completoNussbaum, Clive Joel. "Fat embolism syndrome : a study of its clinical manifestations and long term outcome". Master's thesis, University of Cape Town, 1987. http://hdl.handle.net/11427/26362.
Texto completoAngst, Patrícia Daniela Melchiors. "Efeito do controle supragengival em comparação ao controle combinado supra e subgengival durante a fase de manutenção periódica preventiva : resultados microbiológicos". reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/128798.
Texto completoAim: Compare the effects of supragingival scaling alone (SPG) against the combined supra and subgingival scaling (SPG+SBG), on subgingival microbiota from patients during periodontal maintenance period (PMP), along 1 year. Material and Methods: Sixty-two patients with moderate or severe periodontitis (mean age 50.97 ± 9.26, 40 females, 24 smokers) were treated according to a non-surgical protocol. Ended the therapy phase, they entered a PMP and were randomly allocated to receive SPG or SPG+SBG interventions. Periodontal exams, oral hygiene instructions, and the respective intervention (SPG or SPG+SBG) were performed at quarterly appointments. Subgingival biofilm was sampled at baseline, 3, 6 and 12 months. Real-time PCR technique was used to quantify the bacteria species Porphyromonas gingivalis (Pg), Treponema denticola (Td), Tannerella forsythia (Tf), and Eubacteria domain (Total bacteria). Generalized estimating equations were used to estimate treatment effects while accounting for longitudinal evaluation. Results: No significant inter-groups differences were observed to Pg, Td, Tf, and Total bacteria counts over 1 year. However, from 3 months onward, Pg and Tf counts increased significantly in both groups. Total bacteria and Td counts were maintained overtime. Still, the mean counts of target bacteria species remained at low levels (≤ 103) throughout the study. In parallel, the clinical parameters were maintained without significant changes. Conclusions: The PMP interventions yielded similar microbiological results along time, demonstrating the great impact and importance of supragingival biofilm control during PMP.
Naef, Lindsay. "Long-term consequences of perinatal high-fat feeding on dopamine function and metabolism in rats". Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=112544.
Texto completoIngberg, Claes-Mårten. "Type 1 diabetes mellitus: Aspects of long-term complications and body composition". Doctoral thesis, Uppsala University, Department of Medical Sciences, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3287.
Texto completoStudies concerning social consequences, gastrointestinal and urinary tract symptoms were conducted in a population-based cohort comprising patients with long-standing type 1 diabetes and matched control persons. Three different questionnaires were sent by mail to diabetic patients and control persons. After a mean duration of 28.7±2.6 years, compared to the controls the diabetic patients showed an almost 10 times higher mortality, a lower employment rate and greater need for welfare benefits. These differences were mainly due to diabetic late complications. Education, housing conditions, life-style, civil state, alcohol and smoking habits were similar in the two groups. The prevalence of gastrointestinal symptoms was significantly higher in the diabetic patients than in the controls, and this was found to be attributable to the female diabetic patients. Female diabetic patients had been treated with antibiotics for urinary tract infections more often than controls, they experienced more social problems than controls in daily life because of urinary tract problems and used clamps to prevent wetting more often than did controls.
Body composition and bone mineral density were evaluated in parts of the cohort with long-standing type 1 diabetes and control persons in another population-based cohort comprising diabetic females aged 16-19 years with type 1 diabetes since childhood and matched controls. Besides a tendency to reduced abdominal fat mass in diabetic males, no difference was observed in fat mass, muscle mass or bone mineral density between the patients with long-standing type 1 diabetes and controls. Significant correlations were found between insulin dosage and whole body fat mass in diabetic females and between serum cholesterol levels and abdominal fat mass in diabetic males. The female adolescents had a higher body mass index than the controls, and their overweight was shown to consist almost entirely of an increased fat mass. The distribution of fat, expressed as abdominal-to-leg ratio, correlated significantly to HbA1c and daily dosage of insulin. Bone mineral density did not differ between the groups. IGF I was significantly lower both in patients with long-standing type 1 diabetes and in the adolescent diabetic females compared with their matched controls.
MacKay, Jennifer Christine. "Long-term Behavioral and Neuroendocrine Consequences of Early Adversity (Juvenile Stressor Exposure), and the Buffering Effects of ‘Comfort’ Food". Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/34491.
Texto completoAllen, Christopher Iain. "Closing the asylum : the changing face of care in a service for people with long-term mental health problems". Thesis, University of Leicester, 1998. http://hdl.handle.net/2381/31243.
Texto completoWongsaroj, Jarungwit. "Three-dimensional finite element analysis of short and long-term ground response to open-face tunnelling in stiff clay". Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613981.
Texto completoMunasinghe, Kankanamge Sarasi Madushika. "Facial analysis models for face and facial expression recognition". Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/118197/1/Sarasi%20Madushika_Munasinghe%20Kankanamge_Thesis.pdf.
Texto completoMerchant, Nicole Dawn. "Problems American Indian/Alaska Native adult patients face when attempting the long term self management of their type II diabetes disease process". Thesis, Montana State University, 2010. http://etd.lib.montana.edu/etd/2010/merchant/MerchantN0510.pdf.
Texto completoStavngaard, Lene. "Opdigtede orgasmer". Thesis, Malmö högskola, Fakulteten för hälsa och samhälle (HS), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-26578.
Texto completoMacKenzie, Graham. "Electrophysiological investigations of recognition memory : the role of pre-existing representations in recollection". Thesis, University of Stirling, 2007. http://hdl.handle.net/1893/324.
Texto completoVezzoli, E. "PHARMACOLOGICAL MODULATION OF LACTATE LEVELS AFFECTS THE FORMATION OF LONG-TERM MEMORY AND THE STRUCTURE OF EXCITATORY SYNAPSES IN MICE HIPPOCAMPUS". Doctoral thesis, Università degli Studi di Milano, 2017. http://hdl.handle.net/2434/469202.
Texto completoJacob, Miguel Stevanato. "An estimation of short - and long - term price elasticity of bus demand in São Paulo and a study of its implications on fare subsidies policy". reponame:Repositório Institucional do FGV, 2018. http://hdl.handle.net/10438/20328.
Texto completoRejected by Pamela Beltran Tonsa (pamela.tonsa@fgv.br), reason: Conforme orientação. Por favor ajustar e submeter novamente. att, on 2018-03-01T20:10:31Z (GMT)
Submitted by Miguel Stevanato Jacob (miguelsjacob@gmail.com) on 2018-03-01T21:09:09Z No. of bitstreams: 2 Script_1_Estimations.R: 255806 bytes, checksum: 493b1934f1ee31b494652755d301b09f (MD5) Jacob,S-Miguel_DissertaçãoMestrado_v19.pdf: 3303324 bytes, checksum: c0955536ae88818027fe759bea5bff44 (MD5)
Rejected by Pamela Beltran Tonsa (pamela.tonsa@fgv.br), reason: Prezado Miguel, Favor verificar o e-mail enviado a você. Fazer os ajustes e submeter novamente, Pâmela. on 2018-03-02T13:05:29Z (GMT)
Submitted by Miguel Stevanato Jacob (miguelsjacob@gmail.com) on 2018-03-02T18:03:05Z No. of bitstreams: 2 Script_1_Estimations.R: 255806 bytes, checksum: 493b1934f1ee31b494652755d301b09f (MD5) Jacob,S-Miguel_DissertaçãoMestrado_v19.pdf: 3625404 bytes, checksum: 843fc5b8d3ff530a492f703ee7a00950 (MD5)
Approved for entry into archive by Pamela Beltran Tonsa (pamela.tonsa@fgv.br) on 2018-03-02T18:21:24Z (GMT) No. of bitstreams: 2 Script_1_Estimations.R: 255806 bytes, checksum: 493b1934f1ee31b494652755d301b09f (MD5) Jacob,S-Miguel_DissertaçãoMestrado_v19.pdf: 3625404 bytes, checksum: 843fc5b8d3ff530a492f703ee7a00950 (MD5)
Made available in DSpace on 2018-03-02T20:16:09Z (GMT). No. of bitstreams: 2 Script_1_Estimations.R: 255806 bytes, checksum: 493b1934f1ee31b494652755d301b09f (MD5) Jacob,S-Miguel_DissertaçãoMestrado_v19.pdf: 3625404 bytes, checksum: 843fc5b8d3ff530a492f703ee7a00950 (MD5) Previous issue date: 2018-02-08
São Paulo se expandiu rapidamente durante o Século XX e se tornou uma das maiores cidades do mundo, com aproximadamente 12 milhões de habitantes que realizam cerca de 25 milhões de deslocamentos urbanos diariamente. Seu sistema de transporte público (ônibus e metrô) é responsável por 37% dessas viagens e é notavelmente importante, especialmente para seus usuários intensivos – majoritariamente pessoas pobres cujos deslocamentos dependem dele. Os subsídios ao transporte e o valor da tarifa vêm se colocando no centro de um debate sobre política urbana durante os últimos anos. A Prefeitura de São Paulo gasta quase 7% de seu orçamento em subsídios diretos à tarifa de ônibus que se mantém estagnada em termos reais desde 2005 – empreendendo um valor três vezes maior do que era há dez anos. Ao mesmo tempo, o sistema de ônibus em São Paulo aparenta ser inefetivo em tirar carros das ruas. O ambiente urbano da cidade e a sustentabilidade fiscal desse sistema podem ser colocados em risco se essa situação permanecer, uma vez que um ciclo vicioso de quedas no nível de usuários e aumentos no subsídio podem comprometer o transporte público. O preço e a forma de precificação da tarifa são pontos centrais nessa questão, uma vez que a literatura em finanças púbicas diz que um serviço público pode ser fiscalmente sustentável e ensejar eficiência alocativa à economia se a cobrança por elefor precificada corretamente. O presente trabalho estima a elasticidade preço da demanda por ônibus em São Paulo, uma informação importante para responder se sua tarifa ajuda a: gerar eficiência alocativa na economia; atingir sustentabilidade financeira para o sistema de ônibus e fazer com que as pessoas priorizem o ônibus em detrimento do automóvel privado – e, assim, atingir sustentabilidade urbana. Para tal, modelos de Escolha Discreta são estimados para os anos de 1997 e 2007. Utilizando-se a Pesquisa Origem-Destino do Metrô calculam-se as elasticidades de curto prazo para ambos os anos. Posteriormente, a implementação do Bilhete Único (2004) é considerada um choque exógeno no preço das passagens para aqueles que usam mais de um ônibus para seus deslocamentos, sendo assim uma oportunidade para a estimação da elasticidade de longo-prazo na medida em que é virtualmente um choque exógeno de preço. Os resultados sugerem que a demanda por ônibus é inelástica com respeito ao preço tanto no curto quanto no longo-prazo, o que corrobora literatura prévia. Ainda que mais estudos sejam necessários para avaliar se os subsídios devem ser diminuídos, outras políticas além da forma de precificação devem ser consideradas a fim de se tornar o transporte público mais atrativo.
São Paulo expanded rapidly during the 20th Century and became one of the biggest cities in the World, with almost 12 million inhabitants that make around 25 million urban trips per day. Its transit system (bus and subway) accounts for 37% of those trips and is remarkably important, especially for its heavy users – mainly poor people whose commuting might depend on it. Not by chance, subsidies and fare price have been at the heart of an urban policy debate during the last years. Nowadays, São Paulo’s local government spends almost 7% of its budget in bus subsidies - a threefold increase in real terms in ten years - since costs are soaring and fare remains almost constant in real terms since 2005. Despite high subsidies, the city’s bus system seems to be ineffective in taking cars out of the street and ridership is slightly decreasing. São Paulo’s bus system’s fiscal sustainability might be put at risk if things remain unchanged, in that a vicious cycle of ridership decreasing and fare or subsidies increasing might jeopardize transit and harm urban environment. Fare price and its pricing form are central in this question, since literature on public finance says that one public service’s system can be fiscally sustainable and causes allocative efficiency if fare is priced correctly. The present work calculates price elasticity of bus demand in São Paulo, an important piece of information to answer whether fare helps achieving allocative efficiency for the economy, reaching fiscal sustainability on bus system, and making commuters shift from car to transit – and, hence, keeping the city’s urban sustainability. Discrete Choice Models are estimated for the years of 1997 and 2007 using a household survey on commuting. They directly provide short-term elasticities for both years. Then, Bilhete Único implementation (2004) is considered an exogenous shock on trips’ cost for those who use two buses or more on their commuting, therefore being used as an opportunity for estimating long-term elasticity. The results suggest that bus demand is inelastic with respect to price both in short- and long- term, which corroborates previous literature and provides insight for public policies. This indicates that fare is ineffective in taking cars off the streets, but more studies should be conducted to assess whether subsidies should be reduced, especially for reasons of affordability. Policies other than the pricing form should be conducted to achieve transportation sustainability by modal shifting from cars to transit.
Beresford-Jones, David, Carmela Alarcón, Susana Arce, Alex Chepstow-Lusty, Oliver Whaley, Fraser Sturt, Manuel Gorriti, Oscar Portocarrero y Lauren Cadwallader. "Early Horizon Occupation and Subsistence in the Context of Long-Term Ecological Changes in the Samaca and Ullujaya Basins, Lower Ica Valley". Pontificia Universidad Católica del Perú, 2012. http://repositorio.pucp.edu.pe/index/handle/123456789/113626.
Texto completoEste artículo presenta los resultados de análisis arqueobotánicos y malacológicos realizados en los materiales de un basural fechado hacia las fases Ocucaje 3 a 4 (c. 750 a.C.), con asociación estratigráfica segura debajo de los contextos de una sección de canal del Periodo Nasca Temprano en la cuenca de Ullujaya, en el valle bajo de Ica, costa sur del Perú. Semejante conservación de contextos de ocupación tempranos es poco común al interior del paisaje de esta zona, cuya topografía está determinada, en la actualidad, por los prolongados efectos de la erosión eólica sobre la que tenía en el pasado. Estos antiguos restos de basura no contienen vestigios de plantas domesticadas, con excepción del algodón, además de restos de erizos de mar y otros recursos en forma de mariscos marinos y terrestres recolectados de las lomas y el océano Pacífico, distante 25 kilómetros. Sin embargo, sí contienen algunos restos de plantas, entre las que están alimentos silvestres como semillas de huarango y otras plantas típicas de bosques ripícolas. Se presentan estos resultados en el contexto de otros datos procedentes de las cuencas de Samaca y Ullujaya —como, por ejemplo, los restos de basurales de épocas posteriores y una secuencia palinológica— con el objeto de mostrar, en conjunto, la sostenida intensificación de la agricultura en estas zonas durante el subsiguiente Periodo Intermedio Temprano, lo que desembocó en el colapso de la producción agrícola y el retorno a la recolección de recursos marinos y vegetales durante el Horizonte Medio.
Wang, Ding. "Long-term effects of different fat sources and vitamin E supplementation on growth performance, antioxidant status, carcass characteristics, meat quality, and immune capacity of pigs with heavy slaughter weight up to 150 kg". UKnowledge, 2019. https://uknowledge.uky.edu/animalsci_etds/100.
Texto completoLindman, Oskar y Moa Lövdahl. "Ansiktsigenkänning: Effekter av kort- och långtidsretention". Thesis, Umeå universitet, Institutionen för psykologi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-159459.
Texto completoFace-recognition has foremost been studied with a focus on short-term retention. This research has concluded that in general people are a better in recognizing faces in comparison to recognition of stimuli with matching complexity. Studies have also shown that extraversion and sex affect face-recognition ability. This study investigated long-term memory retention of faces in relation to extraversion and sex. In addition, this study explored the relationship between recognition of faces, and another visual stimulus (dogs). This was conducted by using an experimental within-subjects-design in which the participants performed a computer-based recognition-test both immediately after the study phase, as well as 24 hours later. Revised NEO Personality Inventory (NEO-PI R) was used to measure extraversion. The study had 51 participants (31 women, 19 men, one non-binary, M = 27.69 years). The results showed an advantage in recognition of faces but failed to show a difference in decline between stimuli. There was a stimulus × sex interaction, where women showed an advantage compared to men in recognition of faces but not regarding recognition of dogs. Extraversion was shown to have an effect on the performance only when the most and least extraverted was compared. Finally, there was no relationship between face-recognition and recognition of dogs in the short-term retention test. The study highlights shortcomings in earlier studies investigating extraversion in relation to face recognition and discusses possible reasons for the obtained sex differences. The study also discusses whether holistic processing is implicated in learning, but not with respect to long-term memory consolidation.
Abessolo, Ondoa Grégoire. "Réponse des plages sableuses d'Afrique de l'Ouest, golfe de Guinée, face au forçage multi-échelle". Thesis, Toulouse 3, 2020. http://www.theses.fr/2020TOU30029.
Texto completoThis thesis presents a multi-scale investigation of the role of waves, sea level and human settlements to understand long-term coastal evolution of the 400-km long sandy Bight of Benin coast (Gulf of Guinea, West Africa). Coastal morphology and its ocean drivers are monitored using local shore-based video camera and regional satellite remote sensing. New video developpements show the potential of video camera in sensing daily beach profile, waves and sea level at the coast. The results reveal the dominant influence of waves on shoreline variability at the event (daily) and seasonal scales, whereas at the intraseasonal and interannual scales, the shoreline is dominantly modulated by sea level changes. Over longer periods (decades), anthropogenic influence, such as deep water harbours and the reduction of sediment river (such as Volta and Niger) discharge due to dams significantly alter sediment transport, creating several erosion zones. These observations over the long term are satisfactorily reproduced by the implemented shoreline model, specially in the vicinity of the harbors, and allows to estimate, for example, the amount of sediment nourishment necessary to limit erosion downstream of Lagos harbor. Beside their fundamental interest, these results put strong basis to improve regional coastal policies
Keidel, Lisa [Verfasser]. "The effect of elevated CO2 on soil C and N dynamics and its feedback on CO2 and N2O emissions from a temperate grassland ecosystem : results from a long-term Free Air CO2 Enrichment (FACE) experiment / Lisa Keidel". Gießen : Universitätsbibliothek, 2019. http://d-nb.info/1198674083/34.
Texto completoDobiš, Lukáš. "Detekce osob a hodnocení jejich pohlaví a věku v obrazových datech". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-413019.
Texto completoFraser, Michelle J. "Long-Term Fate of an Emplaced Coal Tar Creosote Source". Thesis, 2007. http://hdl.handle.net/10012/3399.
Texto completo(9153470), Janae H. Bos. "UTILIZING PHOSPHORUS BUDGETS AND ISOTOPIC TRACERS TO EVALUATE PHOSPHORUS FATE IN SOILS WITH LONG TERM POULTRY LITTER APPLICATION". Thesis, 2020.
Buscar texto completoConverting a nutrient management plan from commercial fertilizers to poultry litter helps effectively utilize waste from the nearly 10 billion broiler birds across the United States. Nine field scale watersheds from the USDA ARS Grassland, Soil and Water Research Laboratory near Riesel, TX were evaluated for P inputs and P outputs to determine phosphorus budgets for 15 years of annual application of poultry litter ranging from 75 – 219 kg P ha-1 yr-1 on cultivated and pasture/grazed fields. The cumulative net P continued to increase regardless of the application rate and had a positive relationship with soil level P (Mehlich-3 P) and flow weighted mean concentration (FWMC) for dissolved reactive P for both cultivated and pasture managed fields. We assessed hydrological connectivity within two nested watersheds by using the before-after-control-impact (BACI) design. Results showed hydrological connectivity during high rainfall years whereas low rainfall years had minimal connectivity compared to the controls. These results suggest the P contributions from upstream fields receiving poultry litter, even at high application rates, did not exhibit a treatment effect during the low rainfall years at downslope monitoring stations.
As nutrient source variability increases in nutrient management plans, improving our ability to differentiate P sources and their fate in soils is critical. We evaluated soils with unique P inputs: inorganic P, poultry litter, and cattle grazing for isotopic signatures by forming silver phosphate and determining the δ18OP. Isotopic signatures of the oxygen molecules which are strongly bound to P, provided signatures of 17.09‰, 18.00‰, and 17.20‰ for fields receiving commercial fertilizer, poultry manure, and cattle grazed, respectively. Significant effort was made to determine critical steps in the method to successfully precipitate Ag3PO4 for analysis. Results show adding a cation removal step as well as monitoring and adjusting pH throughout the method increases probability of successful Ag3PO4 precipitation. Findings from this study provide a valuable framework for future analysis to confirm unique δ18OP signatures which can be used to differentiate the fate of different phosphorus sources in agricultural systems.
Ni, Shu-Chen y 倪淑貞. "The Mating Preferences of Long-term and Short-term Relationship: Face Versus Body; Appearance Versus Income". Thesis, 2014. http://ndltd.ncl.edu.tw/handle/16476470866423144375.
Texto completo國立臺北教育大學
社會與區域發展學系碩士班
103
After careful consideration of costs and benefits, both genders make a choice on their mates. In previous studies mainly explores the mating preferences of both genders from the perspective of the evolution. Based on the theories of the evolution, men prefer short-term mating patterns while women prefer long-term ones, which are long-term evolution of mate choice under psychological reactions. Recent studies on sexual mating issue will conduct further researches on the conditions of consideration by both men and women in mate selection and their purposes of communication. Exchanges of different length of periods can affect different sexual strategies. Because of the differences between long-term and short-term social purposes, both sexes may consider different factors, showing different considerations in face and body, appearance and income. This study will still follow the research direction of Jaime c. Confer et al. in two sexes’ long-term and short-term mating preferences, but changes research method, which is divided into two parts to investigate the differences of mating preferences in long- and short-term exchanges for face and body, appearance and income. The study extends the research scope into body color, legs body ratio, large calf ratio, height and other four projects. For two kinds of questionnaires of short-term and long-term design, the participants choose the subjects in their mind through forced choice method of choosing one between face or body, and appearance or income. This study found that the proportion of men’s preference for women of pretty face and poor body in long-term mating is increasing compared with short-term mating, which only increases in long-term mating. .However, the proportion of women’s preference for men of pretty face and poor body in short-term mating is increasing compared with long-term mating, which only increases in short-term mating. Moreover, the study of both sexes in the long-term and short-term appearance and income difference of mating preferences found that the proportion of men’s preference for women of poor face and high income in long-term mate selection was increasing compared with short-term mating. Women also show the same results, but the proportion of women’s preference for men of poor face and high income in long-term mate selection was much larger than men.
BELLISARIO, VERONICA. "Long-term effects of prenatal exposure to high-fat diet in an animal model of reduced oxidative stress". Doctoral thesis, 2014. http://hdl.handle.net/2158/949357.
Texto completoLenhart, Katharina [Verfasser]. "The effects of long-term Free Air CO2 Enrichment (FACE) on soil aggregation, soil carbon input, and ecosystem CO2 dynamics in a temperate grassland ecosystem / vorgelegt von Katharina Lenhart". 2009. http://d-nb.info/993755720/34.
Texto completo