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Littérature scientifique sur le sujet « Jar test »

Auteur : Grafiati
Publié le 4 juin 2021
Mis à jour le 10 février 2022

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Articles de revues sur le sujet "Jar test"

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Krasner, Stuart W., et Gary Amy. « Jar-test evaluations of enhanced coagulation ». Journal - American Water Works Association 87, no 10 (octobre 1995) : 93–107. http://dx.doi.org/10.1002/j.1551-8833.1995.tb06438.x.

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Anggraini, Anna, Kesuma Sayuti et Rina Yenrina. « Accelerated Shelf Life Test (Aslt) Method with Arrhenius Approach for Shelf Life Estimation of Sugar Palm Fruit Jam With Addition of Asian Melastome (Melastoma malabathricum, l.) on Jar Packaging and Pouch ». Journal of Applied Agricultural Science and Technology 3, no 2 (31 août 2019) : 268–79. http://dx.doi.org/10.32530/jaast.v3i2.114.

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Abstract. Base on previous studies showing that sugar palm fruit can be made as jam with the addition of Asian melastome fruit as a natural coloring. This sugar palm fruit jam product is packaged with jar and pouch packaging. shelf Life information for this product is unknown. The purpose of this study is to determine the rate of change in quality, critical parameters, and estimate the shelf life of sugar palm fruit jam with Arrhenius Model which is simulated at three storage temperature conditions (28⁰C, 38⁰C, and 48⁰C). Parameters observed during the storage process are water content, water activity (aw), pH, color (L), anthocyanin, and antioxidant activity (IC50). The results showed that the smallest activation energy value was used to determine product shelf life, it is color parameters (L) (first order reaction) with linear regression y = -4715.x + 9,787 on jar bottle packaging and y = -2021.x + 1,387 on packaging pouch. The age of storing sugar palm fruit jam with jar bottles is 93 days at 28⁰C and on the packaging pouch for 40 days at 28⁰C.
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Bouyer, D., R. Escudié et A. Liné. « Experimental Analysis of Hydrodynamics in a Jar-test ». Process Safety and Environmental Protection 83, no 1 (janvier 2005) : 22–30. http://dx.doi.org/10.1205/psep.03109.

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Tang, Chao Chun, Xin Ye, Hui Min Chen et Min Liu. « Discussion on Simulation Rotational Speed of Coagulation Jar Test ». Advanced Materials Research 1073-1076 (décembre 2014) : 1047–51. http://dx.doi.org/10.4028/www.scientific.net/amr.1073-1076.1047.

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According to the characteristic of mixing and flocculation of water plant, the calculation formula of the simulation rotational speed of agitator was proposed for the coagulation-flocculation jar test of optimum dosage, which was based on the basic principle that the velocity gradient of production is equal to that of experiment. Obtained the calculation formula for related parameters about coagulation agitator through the determination of the actual production velocity gradient and combined with the coagulation jar test data in laboratory, such as the power consumption of the paddle boards; the proportional coefficient of coagulation agitator and the agitation speed etc. The result shows that the experiment simulation according with the effect of practical produce of water plant can provide the reliable optimum dosage of coagulant for the practical production. This research has a great signality to waste-water treatment, Results not only have great economic benefit, but also can achieve a certain ecological benefit, accorded with the demand of developing low carbon environmental protection.
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Stanley, S. J., et D. W. Smith. « Measurement of Turbulent Flow in Standard Jar Test Apparatus ». Journal of Environmental Engineering 121, no 12 (décembre 1995) : 902–10. http://dx.doi.org/10.1061/(asce)0733-9372(1995)121:12(902).

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Eom, Hak-Yong, Gi-Chun Lee, Mu-Seong Chang, Jong-Won Park et Yong-Bum Lee. « Accelerated Life Test of Industrial Cleaner Motor ». Journal of Applied Reliability 18, no 3 (30 septembre 2018) : 193–200. http://dx.doi.org/10.33162/jar.2018.09.18.3.193.

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Park, Seonhwa, et Seongwoo Kim. « Degradation Test for Electronic Systems in Vehicles ». Journal of Applied Reliability 20, no 1 (31 mars 2020) : 1–8. http://dx.doi.org/10.33162/jar.2020.3.20.1.1.

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Murshed, Mohamad Fared, John A. van Leeuwen, Christopher W. K. Chow et Mary Drikas. « Modification of jar testing protocol combined with mEnCo model predicted dose to predict dissolved organic matter removal for surface water ». Water Supply 14, no 3 (30 septembre 2013) : 358–66. http://dx.doi.org/10.2166/ws.2013.199.

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In recent climatic events in Australia, the need for frequent jar testing to determine optimum coagulant and flocculant aid doses became apparent in order to determine optimum treatment efficiencies. The generally applied jar test procedure can be time consuming and this prompted investigations for capacity to test waters more rapidly, for a range of treatment conditions and raw water qualities. The aim of the study reported here was to develop a rapid procedure for determination of dissolved organic matter (DOM) removal, measured as dissolved organic carbon (DOC) and UV absorbance (254 nm/cm) for a range of treatment conditions (coagulant dose and pH). Using a previously established predictive model (mEnCo) for coagulant determination, several coagulant doses were then predicted for application in a modified jar test protocol. Best fitted and predicted data using the exponential decay function compared with data from a 6× jar test procedure were obtained using three doses, 0.5× EnCD, EnCD and a VHD (≥2× EnCD). It is proposed that this procedure may be used to more rapidly determine treatment efficiency based on the removal of organics compared with traditionally applied jar tests.
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OH, Bong S., Sang C. Park et Joong S. Jang. « A Comparison of Reliability Test Standards for TSC ». Journal of Applied Reliability 19, no 4 (31 décembre 2019) : 413–20. http://dx.doi.org/10.33162/jar.2019.12.19.4.413.

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Cho, A. Hyun. « A Method to Test Windshield Wiper in Snow ». Journal of Applied Reliability 21, no 1 (31 mars 2021) : 1–4. http://dx.doi.org/10.33162/jar.2021.3.21.1.1.

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Thèses sur le sujet "Jar test"

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Hägg, Kristofer. « Kalciumklorid som hjälpkoagulant ». Thesis, KTH, Skolan för kemivetenskap (CHE), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-170638.

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As populations continue to grow, the demand for fresh drinking water is increasing. This puts a lot of pressure on drinking water producers to strive for more efficient solutions and techniques. Many producers worldwide use surface water as a raw water source, which they often treat through coagulation and flocculation techniques. This is done by adding coagulant (e.g. metal coagulants), creating instability in the suspension, causing flocculation. In this work, PIX-311 (a FeCl3 coagulant produced by Kemira) and Al2(SO4)3 (Kemwater ALG) were used as primary coagulants and CaCl2 (produced by TETRA Chemicals) as an adjunct in a coagulation and flocculation study. The goal of this work was to study the effects of CaCl2 additions to Fe(III) and Al(III) flocculation. The experiments were conducted at Ringsjöverket (a water treatment facility), using jar tests to simulate the treatment process on a laboratory scale. The raw water samples used in this study, were taken from Bolmen, a lake in southern Sweden. A spectrophotometer was used to monitor the efficiency of flocculation by UV-VIS absorption. In the first experiments, various CaCl2 additions were added to Fe(III) flocculation, with FeCl3 as a primary coagulant. To see if FeCl3 could be substituted with CaCl2, the amount of primary coagulant was reduced to about 80% of the optimal dosage (the dose used daily by the water treatment plant). In the next series of experiments, various amounts of CaCl2 were added with an optimal dose of FeCl3. After that, the effects of CaCl2 additions to Al(III) flocculation were conducted, using Al2(SO4)3 as a primary coagulant. The experiments followed the previous scheme used in Fe(III) flocculation. The UV-VIS results showed that no CaCl2 additions were effective enough to replace the primary coagulant. However, reduced amount of primary coagulant benefited slightly from small CaCl2 additions. A likely explanation for this is the ability of Ca2+ to aid in charge neutralization and reduce the repulsive forces between particles in suspension, aiding coagulation. Furthermore, CaCl2 additions, with reasonable certainty, did not increase the efficiency of Fe(III) flocculation. When the CaCl2 dose was increased (from about 13µl to 820 µl per liter raw water), the effect became negative. In other words, high doses of CaCl2 inhibited flocculation by, most likely, occupying adsorption sites for the primary coagulant. This was observed for an optimal FeCl3 dose, reduced FeCl3 dose and an optimal dose of Al2(SO4)3. In the more brief study on Al(III) flocculation, low CaCl2 doses did not appear to have any effect on flocculation at first.  However, when a reduced amount of Al2(SO4)3 was used, the samples with CaCl2 gave better UV-VIS results once the pH was increased from 6 to about 6.15. One explanation for this could be that the shift in flocculation mechanism at higher pH, causes CaCl2 to have an increased positive effect.
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Desjardins, Christian. « Simulation et étude en laboratoire de la floculation lestée, ACTIFLO, à l'aide d'une procédure modifiée de Jar test ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0019/MQ53568.pdf.

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Bouyer, Denis. « Analyse expérimentale de la floculation : influence de l'hydrodynamique sur les phénomènes d'agrégation et de rupture ». Toulouse, INSA, 2002. http://www.theses.fr/2002ISAT0037.

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La thèse s'inscrit dans le cadre du traitement d'une eau naturelle en vue de la rendre potable. Elle aborde au plan expérimental l'analyse de l'étape ortho-cinétique de la floculation. L'objectif est de relier la taille des flocs aux caractéristiques hydrodynamiques. L'analyse de l'hydrodynamique est réalisée par le biais de la technique PIV et l'analyse de la taille des flocs par une technique couplée d'acquisition et de traitement d'images. Une première série d'expériences en jar-test confirme que les flocs sont calibrés par la micro-échelle de Kolmogorov. Une seconde série d'expériences en cuve agitée, pour une même puissance dissipée avec deux agitateurs différents, montre que si la taille moyenne des flocs est bien calibrée par la turbulence, la distribution en taille est également fonction de l'hydrodynamique propre à chaque agitateur
The present work concerns coagulation-flocculation in drinking water treatment units. The experimental analysis of the ortho-kinetic step of flocculation is pointed out. The study focuses on the link between hydrodynamics and floc size. Hydrodynamics is investigated with the PIV technique and the floc size is analysed by image processing. Firstly, experiments are performed in a jar-test, and exhibit that the Kolmogorov micro scale calibrates the flocs. Then, experiments are performed in standard agitated tank for the same power input and two different impellers. The average floc size is confirmed being calibrated by turbulence, and yet the floc size distributions depend on local hydrodynamics generated by each impeller
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King, Charles Sean. « The Utilization of Granular Media Filtration and Rapid Flocculation in a Modified Jar Test Procedure for Drinking Water Treatment ». Thesis, The University of North Carolina at Charlotte, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10683115.

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Jar testing is one of the most common tools that water treatment facilities use to determine the treatment conditions necessary to meet finished water quality goals. A six-place stirrer is normally used for jar testing to provide identical mixing conditions while coagulant dose and pH vary in each jar to create “floc” that is removed via sedimentation. There are some utilities that are unable to utilize jar testing, since the current jar testing procedures do not identify optimum treatment conditions for their water supply. This is particularly true for those utilities treating low-turbidity, low-TOC waters because low coagulant doses can produce small floc that does not settle efficiently (even though it is removed efficiently by filters). A modified jar test procedure was developed with the goal of providing consistent and reliable results for all treatment facilities without having to make site-specific changes to the mixing speeds and times to try to match the plant performance. Instead of sedimentation, the modified jar test procedure uses a novel granular media filter along with a standardized mixing protocol and titrations to predict and control the pH of the coagulated water. Contour mapping of jar test data was utilized to provide a detailed visual description of zones of effective treatment. Research found that the application of direct filtration (instead of traditional sedimentation) reduced testing time and showed better correlation to treatment plant performance. A method of optimizing coagulant dose and coagulated pH based on titrations is proposed, which is based on an alternating, single-variable optimization method with experimentally determined starting points. Treatment with coagulant only (i.e., without prior pH adjustment) limits the range of coagulation conditions a water treatment plant can operate at. Coagulants are acidic and their addition during treatment causes both the pH and coagulant dose to change simultaneously. Treating water with coagulant only provides only one diagonal path for treatment to occur across a two-dimensional area of pH and coagulant dose combinations, which sometimes misses optimal treatment conditions entirely.

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González, Sánchez María Fernanda. « Separate treatment of wash water from sand filter using disc filter technology ». Thesis, KTH, Mark- och vattenteknik (flyttat 20130630), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171843.

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The purpose of this study is to evaluate the convenience and effectiveness of using a disc filter to treat washing water from the sand filters at Sundet wastewater treatment plant. The disc filter is used aiming for the reduction of suspended solids and phosphorus. The study was divided in two main experimental stages. During the first stage laboratory jar-tests were performed in order to identify which flocculation aid was more suitable, this was further on used to improve the water treatment. Based on the laboratory trials results, two different polymers (1 and 2) were chosen to be tested at pilot scale. The second stage involved the pilot filter operation itself; this period was as well divided in two sub-stages where filter cloths with two different pore openings were tested. During the first sub-stage the pilot operated with an 18 μm pore opening filters cloth and both polymers. At the end of the first half polymer 1 showed to be more efficient and so it was further used throughout the second sub-stage in combination with a 10μm pore opening filter cloth. As from theoretical knowledge the phosphorus and suspended solid removal were expected to be between 75% and 90%, results which were achieved during both laboratory trials and pilot filter. The best results were observed with the 10μm pore opening filter cloth and polymer 1. Also, additional results from pilot trials performed at Sundet after the study period are presented.
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Hopkins, Aareka. « The potential for Charophyte re-establishment in large, shallow, eutrophic lakes with special reference to Lake Waikare, New Zealand ». The University of Waikato, 2006. http://hdl.handle.net/10289/2419.

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Lake Waikare is a large, shallow eutrophic lake devoid of submerged macrophytes. I investigated potential methods for re-establishing submerged macrophytes in the lake. Specifically, I subjected charophyte (Chara corallina) plantlets to two treatments of exposure in the lake (in areas exposed and sheltered from wind) to test for survival and growth under these conditions, and inside and outside fish exclosures to test for growth and survival in the presence of fish. While plantlets grew outside the exclosures in winter, their accumulated biomass over 21 days was less than protected plantlets. In winter, the accumulated biomass was lower outside than inside exclosures (by ~40%) at the sheltered site and was lower outside than inside exclosures (by 43%) at the exposed site. Overall, growth rates in winter were higher at the sheltered site (compared to the exposed site) by ~7%. In summer, charophyte accumulated biomass inside the exclosures increased by 85%, while at the sheltered site accumulated biomass increased by 58%. Outside the exclosures in summer the plantlets were completely removed at both sites. Overall, growth rates where higher at the exposed site than the sheltered site by 31%. Fish were responsible for the partial removal of plantlets in winter and total removal of plantlets in summer, and therefore affect the survival and growth of charophytes in Lake Waikare. The embayment at the sheltered site provides the best location in winter for re-establishment of charophytes from oospores because better growth rates were obtained there, and its sheltered location provides protection from severe wave action found at the exposed site. Oospores did not germinate after being submersed in the lake for 90 days due to heavy sedimentation. To induce an improvement in the present light climate, Alum was tested to determine its effectiveness and longevity for settling lake sediments to allow charophytes to establish and grow. Examining the settling rates of Lake Waikare sediments and water treated with Alum over a range of suspended sediment concentrations and time intervals, sediments settled faster with Alum than without for at least 15 days (at 200 g l^1 suspended sediment concentration) and it remained active to 60 days but at reduced effectiveness. At the other concentrations tested (100 g l^1 and 300 g l^1 suspended sediment concentration), Alum responses were insignificant. An improved light climate achieved by fish removal or Alum treatment will likely not be sufficient to permit the re-establishment of submerged macrophytes due to the turbid, algal-dominated state of the lake. The present nutrient and sediment levels, wave climate and fish influence must be mitigated so charophyte plantlets can be established.
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Carrim, Ayesha Hamid. « The effect of pre-ozonation on the physical characteristics of raw water and natural organic matter (NOM) in raw water from different South African water resources / Ayesha Hamid Carrim ». Thesis, North-West University, 2006. http://hdl.handle.net/10394/21.

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Research in the use of ozone in water treatment conducted by many authors support the idea that the nature and characteristics of natural organic matter (NOM) present in raw water determines the efficiency of ozonation in water purification. An ozone contact chamber was designed and made to allow pre-ozonation of water to take place. The concentration of ozone in the chamber was determined using the Indigo method. For the duration of one year, water samples were collected from four different sampling sites and analyzed to determine their overall ecological status with regard to several variables such as pH, chlorophyll-a, SAC254, turbidity, DOC, algal species composition and sum of NOM. Two dams sites and two riverine sites were chosen, Hartbeespoort Dam (a hyper-eutrophic impoundment), Boskop Dam (a mesotrophic impoundment), Midvaal Water Company at Orkney and Sedibeng Water at Bothaville. The samples were treated in Jar Tests with FeCI3 and the same variables were measured. Preozonation followed by Jar Tests was performed on each sample at twoconcentrations of ozone and the variables were measured to examine the efficiency of ozonation. In general, the ph was high and stayed the same for all the samples and for all the treatments. DOC was variable and showed no relationship to any other variable or to the treatments. Hartbeespoort Dam was found to be a eutrophic impoundment characterized by high algal bloom of the cyanobacteria Microcystis sp., Turbidity, SAC254, and the sum of NOM were lower than for the riverine sites but higher than for Boskop Dam. The NOM constituted more intermediate molecular weight(1MW)and low molecular weight (LMW) fractions than the riverine sites. Ozone was effective in reducing chlorophyll-a, turbidity and SAC254 from Hartbeespoort Dam, but the presence of large numbers of algal cells interferes with its efficiency. Release of cell-bound organics after ozonation can lead to increases instead of decreases in these variables. Jar Test results demonstrate that ozonation improves water quality when compared to conventional treatment although the interference of algal cells can alter results. Boskop Dam is a mesotrophic impoundment characterised by low productivity, low SAC254, tow turbidity and low sum of NOM. However, it has a large portion of the LMW fraction of NOM present. This LMW fraction affects the treatment process as this fraction is not acted upon by ozone. Therefore it was found that ozonation did not improve the quality of the water when compared to conventional treatment. The two riverine sites, Midvaal and Sedibeng were similar to each other. Both sites had high algal productivity with high chlorophyll-a values indicative of algal blooms observed at certain times. These blooms consisted either of members of Bacillariophyceae or Chlorophyceae. High turbidity and SAC254 was observed during the rainy season and was related to the high percentage HMW and IMW fractions of NOM present. There was correlation between the turbidity and SAC254 of these sites leading to the assumption that the turbidity of the river is due to the presence of HMW humic fractions of NOM. Ozonation was effective in improving water quality with respect to turbidity, SAC254 and chlorophyll-a removal, both on its own and after conventional treatment when combined with a coagulant. However, the species of algae present affects ozonation as members of Bacillariophyceae are not affected by the actions of ozone because of the presence of a silica frustule whereas members of Chlorophyceae are easily removed by ozone. In general, ozone acts upon the HMW and LMW fractions of NOM causing them to breakdown into smaller fractions. Ozone has no effect on samples that have a high percentage of the LMW fraction of NOM. This LMW fraction is more readily removed by conventional treatment than by ozonation. The presence of large numbers of algal cells as well as the species of cells can negatively affect the treatment process with regard to ozone.
Thesis (M. Environmental Science (Water Science))--North-West University, Potchefstroom Campus, 2007.
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Olds, William. « Lignite Derived Humic Substances for Treatment of Acid Mine Drainage ». Thesis, University of Canterbury. Civil and Natural Resources, 2011. http://hdl.handle.net/10092/6583.

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Addition of alkalinity to acid mine drainage (AMD) results in the neutralisation of acidity and precipitation of dissolved metals as insoluble hydroxides. Two aspects of the current AMD treatment practice at the Stockton Mine could be enhanced. Firstly, residual water quality may be poor due to unreacted alkalinity reagents, particularly CaCO3, resulting in poor water clarity and elevated suspended solids (SS). Secondly, neutralisation to circum-neutral pH may not avoid the discharge of residual metals (Ni and Zn) due to incomplete adsorption and hydroxide precipitation. The aim of this project was to enhance the conventional neutralisation of AMD through addition of humic substances (HS) to reduce residual SS and trace metal concentrations. Humic substances are organically derived and have a high molecular weight. Functional groups on the surface of HS are capable of binding dissolved metals, forming HS-metal complexes. Incorporation of HS complexed metals into settling floc could result in increased metal removal from the dissolved phase. Modified jar testing was used to investigate the effects of HS addition before, after and during (pH 4.5) neutralisation of AMD in two treatment scenarios at the Stockton Mine; the Blackwater Treatment Plant (BTP) using NaOH and Ca(OH)2 and the Mangatini Stream-sump System (MSS) using CaCO3. Supernatant samples collected during the sedimentation period were analysed for basic water quality parameters (turbidity and suspended solids) and dissolved (< 0.45 µm) metal concentrations. The addition of HS to the BTP process before (pH 2.8) and during (pH 4.5) neutralisation resulted in HS precipitation. Precipitated HS subsequently acted as a nucleation site, triggering flocculation of precipitating metal hydroxides, resulting in low turbidity and suspended solids (SS) of less than 2 NTU and 5 mg/L, respectively. The addition of HS after neutralisation (pH 7) did not result in HS precipitation. Intermolecular bridging of HS by the divalent Ca resulted in incorporation of HS into floc when neutralised by Ca(OH)2, resulting in low turbidity and SS. However, in NaOH neutralised conditions, the monovalent Na was unable to bridge HS molecules, resulting in HS remaining dissolved and contributing to elevated turbidity and SS of up to 24.4 NTU and 18.4, respectively. The neutralisation efficiency of CaCO3 is relatively low, thus approximately 1000 mg/L CaCO3 remained unreacted in MSS scenarios, resulting in elevated turbidity and SS. When added after neutralisation, dissolved Solid Energy Humic Acid (SEHA) facilitated flocculation of residual CaCO3 SS, resulting in an up to 75% lower suspended solids than CaCO3 neutralisation alone conditions. Although the results are good, the efficiency of SEHA as a polymer compared unfavorably in a cost: benefit analysis to two commercially available polymers for the removal of residual CaCO3. Neutralisation of AMD in control samples resulted in decreased concentrations of the target metal group (Ni, Zn, Cu, Cd, and Pb) by hydroxide precipitation, co-precipitation, and adsorption. Equilibrium speciation modeling showed that the HS-metal binding affinity controlled the effectiveness of HS addition for metal removal. The low HS complexation affinity of Ni and Zn resulted in no additional metal removal by HS dosing. The removal of Cu was enhanced by over 50% for SEHA 20 during-neutralisation conditions neutralised by both NaOH and Ca(OH)2. Up to 80% lower Cd concentrations were observed for all HS dose conditions when neutralised by Ca(OH)2. Data for CaCO3 HS dosed metal removal was statistically indeterminate. The high detection limit for Pb made any HS dosed removal enhancement difficult to identify, which was unfortunate as Pb has a high HS complexation affinity (Čežı́ková, Kozler et al. 2001; Milne, Kinniburgh et al. 2003). A simple cost: benefit analysis showed that the additional removal of metals by HS dosing was less efficient than conventional neutralisation alone, on a cost basis. Overall, incorporation of HS into AMD treatment results in improved water quality for CaCO3 neutralisation and lower concentrations of metals with a high HS binding affinity, for some conditions. However, further investigation is required to improve the feasibility of HS incorporation into the AMD neutralisation process.
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Pais, Mariana Castello Novo. « Avaliação da presença de fármacos, por LC-MS/MS, em águas superficiais pré e pós-tratamento convencional por ensaio Jar-test e caracterização do risco humano ». Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/9/9141/tde-01072015-111741/.

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O aumento crescente da população brasileira em combinação com o uso abusivo de medicamentos no mercado nacional, aliados à falta de saneamento básico e de políticas públicas para o correto gerenciamento de alguns tipos de resíduos têm resultado na presença de compostos farmacêuticos em ambientes aquáticos. Estudos indicam que várias dessas substâncias parecem ser persistentes no ambiente e algumas vezes, resistem até mesmo às estações de tratamento de água, fazendo-se presentes na água tratada, que chega à população. O presente trabalho visou analisar quantitativamente a presença dos anti-inflamatórios e do analgésico mais comumente consumido no Brasil: diclofenaco, cetoprofeno, naproxeno, indometacina, ibuprofeno e o paracetamol em águas superficiais, por LC-MS/MS com extração em fase sólida, antes e depois do tratamento convencional, em escala laboratorial pelo ensaio de Jar-Test, bem como caracterizar o risco humano pela presença destes compostos na água após o tratamento. Os métodos utilizados na quantificação destes fármacos apresentaram bons resultados: a análise cromatográfica obteve coeficientes de correlação entre 0,9952-0,9991, com limites de quantificação de 0,5ng/mL- 50ng/mL e desvios padrões entre (0,08-2,08); na recuperação do método de extração em fase sólida o diclofenaco, o cetoprofeno, o naproxeno e a indometacina apresentaram cerca de 100% de recuperação, o ibuprofeno apresentou apenas 48%(±9,37) de recuperação e o paracetamol aproximadamente 19,84% (±2,52); no ensaio de jar-test, observou-se que apenas o cetoprofeno e o ibuprofeno não foram removidos completamente no tratamento utilizado (remoção de 0-15% do cetoprofeno e de 0-35% do ibuprofeno). Amostras ambientais foram coletadas e tratadas pelo ensaio de Jar-Test, e os valores obtidos para o cetoprofeno e ibuprofeno após o tratamento foram de 18,67-19,65ng/L e 147ng/L, respectivamente. Através de cálculos, com a dose de referência de cada um dos compostos e considerando as características desta exposição, foi possível concluir que nestas concentrações o cetoprofeno e o ibuprofeno não causam risco à saúde humana.
The increasing population growth in combination with the misuse of drugs in the domestic market, coupled with the lack of sanitation and public policies for proper management of some types of waste have resulted in the presence of pharmaceutical compounds in aquatic environments. Studies indicate that several of these substances appear to be persistent in the environment and sometimes even resistant to water treatment plants, being present in the treated water which reaches the population. This study aimed to analyze quantitatively the presence of anti-inflammatory and analgesic most commonly consumed in Brazil: diclofenac, ketoprofen, naproxen, indomethacin, ibuprofen and paracetamol in surface waters by LC-MS/MS with solid phase extraction prior and after conventional treatment in a laboratory scale by using Jar-test assay, and to determine the human risk posed by the presence of these compounds in the water after treatment. The methods used to quantify these drugs showed good results: a chromatographic analysis obtained correlation coefficients between 0.9952 to 0.9991, with limits of quantification of 0.5 ng/mL- 50ng/mL and standard deviations between (0.08 - 2.08); recovery method of solid phase extraction to diclofenac, ketoprofen, naproxen and indomethacin showed about 100% recovery, ibuprofen showed only 48% (± 9.37) and paracetamol approximately 19 84% (± 2.52) recovery; in the jar-test, it was observed that only ketoprofen and ibuprofen were not completely removed (removal: 0-15% of ketoprofen and 0-35% of ibuprofen). Environmental samples were collected and handled by jar-test test, and the values obtained for ketoprofen and ibuprofen after treatment were 18.67 to 19.65 ng / L and 147ng / L, respectively. By calculation with a reference dose of each compound and considering the characteristics of this display, it was concluded that these concentrations of ketoprofen and ibuprofen do not cause risk to human health.
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Hofmanová, Lucie. « Modelový výzkum účinnosti separačních technologií úpravy vody ». Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392125.

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This diploma thesis deals with the effectiveness of separation technologies for water treatment. The first theoretical part mentions types of pollution that can be found in surface water. Furthermore, the interparticle interactions affecting the stability of colloidal dispersions are discussed. The following is a description of the principle, procedure, mechanisms of coagulation and factors influencing this process. The chapter dealing with types of water treatment is followed by a more detailed description of the individual separation technologies used in the water treatment plants. The important passage in the theoretical part is the description of materials and reagents used in laboratory experiments. The coagulants nanoiron and sodium water glass are characterized, as well as Bayoxide E33, CFH 0818, FILTRASORB 100 activated charcoal and DORSILIT silicate sand. The experimental part of the thesis analyses the jar test procedure. The flocculation tester intended for the jar test was used for laboratory coagulation using nanoiron and sodium water glass. The effectiveness of selected coagulants in the removal of turbidity from water during sedimentation of flakes produced in reaction vessels was investigated. In addition, the effectiveness of individual filtering materials in the removal of turbidity from water containing nanoiron/sodium water glass was investigated. In the end, the results of laboratory tests are compared and evaluated, including photos taken during experiments.
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Livres sur le sujet "Jar test"

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Piotr, Dąbrowski, et Galeria Test (Warsaw Poland), dir. Jan Młodożeniec, in memoriam, 77 plakatów : 14.04.-6.05.2011, wystawa z kolekcji Piotra Dąbrowskiego, Galeria Test. Warszawa : Galeria Test, 2011.

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Allum, Nick. Paired Samples T-test and the Eurobarometer (63.1, Jan–Feb 2005) : Beliefs About New Technology. 1 Oliver's Yard, 55 City Road, London EC1Y 1SP United Kingdom : SAGE Publications, Ltd., 2015. http://dx.doi.org/10.4135/9781473937741.

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Allum, Nick. Difference of Means T-test and the Eurobarometer (63.1, Jan–Feb 2005) : Science Literacy and Gender. 1 Oliver's Yard, 55 City Road, London EC1Y 1SP United Kingdom : SAGE Publications, Ltd., 2015. http://dx.doi.org/10.4135/9781473947511.

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Kochanowski, Jan. Elegiarum Libri Quattuor. Sous la direction de Francesco Cabras. Florence : Firenze University Press, 2019. http://dx.doi.org/10.36253/978-88-6453-922-5.

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Il presente volume contiene l’edizione critica con commento filologico delle elegie latine del più importante poeta del Rinascimento polacco. Il commento in particolare non si limita alla raccolta di similia, ma s’interroga anche sui modi dell’imitatio di Jan Kochanowski, sottolineandone le straordinarie capacità poetiche nonché il suo rapporto vivo e vivace con i testi classici, che egli riutilizza abilmente per soddisfare le proprie esigenze di significazione.
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Broekhuis, Hans, et Norbert Corver. Syntax of Dutch. NL Amsterdam : Amsterdam University Press, 2019. http://dx.doi.org/10.5117/9789463720502.

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The multi-volume work Syntax of Dutch presents a synthesis of current thinking on Dutch syntax. The text of the seven already available volumes was written between 1995 and 2015 and issued in print between 2012 and 2016. The various volumes are primarily concerned with the description of the Dutch language and, only where this is relevant, with linguistic theory. They will be an indispensable resource for researchers and advanced students of languages and linguistics interested in the Dutch language. This volume is the final one of the series and addresses issues relating to coordination. It contains three chapters. Chapter 1 discusses the syntactic and semantic properties of coordinate structures and their constituting elements, that is, the coordinators and the coordinands they link. Chapter 2 discusses the types of ellipsis known as conjunction reduction and gapping found in coordinate structures. Chapter 3 discusses elements seemingly exhibiting coordination-like properties, such as dan ‘than’ in comparative constructions like Jan is groter dan zij ‘Jan is taller than she’.
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Marek, Jindřich. Jak jsem potkal Kelty, aneb, Češi přišli ve středu-- : Tři tucty fejetonů, jeden test a pár vysvětlivek pro ty mladší. Opava : Nakl. Optys, 1995.

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Carter, John F. Flying quality analysis of a JAS 39 Gripen ministick controller in an F/A-18 aircraft. Edwards, Calif : National Aeronautics and Space Administration, Dryden Flight Research Center, 2000.

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Tussen tekst en publiek : Jan van Doesborch, drukker-uitgever en literator te Antwerpen en Utrecht in de eerste helft van de zestiende eeuw. Amsterdam : Rodopi, 1990.

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Fra det nu forsvundne Dansk Vestindien : Billeder med uddybende tekst, der beskriver historien om vor gamle tropekoloni, øerne St. Thomas, St. Croix og St. Jan. [Birkerød] : Strandberg, 1987.

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Perotti, Giovanni, dir. Sega Mega Drive Game Secrets : Strategie e Segreti, Volume 2. Via Rosellini, Milano, Italy : Jackson Libri, 1993.

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Chapitres de livres sur le sujet "Jar test"

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Boterbloem, Kees. « Genre and the Test of Time ». Dans The Fiction and Reality of Jan Struys, 150–63. London : Palgrave Macmillan UK, 2008. http://dx.doi.org/10.1057/9780230583658_14.

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Grootendorst †, Albert W., Jan Aarts, Miente Bakker et Reinie Erné. « Latin text and translation ». Dans Jan de Witt’s Elementa Curvarum Linearum, 59–255. London : Springer London, 2010. http://dx.doi.org/10.1007/978-0-85729-142-4_3.

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Thevissen, P., et G. Willems. « 12 De Triple Test : Het K.U.Leuven-protocol voor leeftijdschattingen van nietbegeleide minderjarige vluchtelingen ». Dans Het Tandheelkundig Jaar 2013, 175–90. Houten : Bohn Stafleu van Loghum, 2013. http://dx.doi.org/10.1007/978-90-313-9092-2_12.

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Matzinger, Polly. « The JAM Test : An Assay of Cell Death ». Dans Cytotoxic Cells : Recognition, Effector Function, Generation, and Methods, 472–77. Boston, MA : Birkhäuser Boston, 1993. http://dx.doi.org/10.1007/978-1-4684-6814-4_45.

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Grootendorst, Albert W. « Latin text and translation ». Dans Jan de Witt’s Elementa Curvarum Linearum, Liber Primus, 37–215. New York, NY : Springer New York, 2000. http://dx.doi.org/10.1007/978-1-4612-1238-6_3.

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Bartsch, Kurt. « „Das dreißigste Jahr“ und das „Todesarten“-Projekt ». Dans „Text-Tollhaus für Bachmann-Süchtige?“, 130–40. Wiesbaden : VS Verlag für Sozialwissenschaften, 1998. http://dx.doi.org/10.1007/978-3-663-09184-4_9.

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Brandt, Peter. « Quality assurance and quality control including the development of incurred test material and the organisation of a proficiency test ». Dans Bericht aus dem Nationalen Referenzlabor des BVL für das Jahr 2008, 19–21. Basel : Birkhäuser Basel, 2009. http://dx.doi.org/10.1007/978-3-0346-0235-8_3.

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Stärk, Robert F., Joachim Schmid et Egon Börger. « The object-oriented extension $${\text{Jav}}{{\text{a}}_\mathcal{O}}$$ of Javac ». Dans Java and the Java Virtual Machine, 71–85. Berlin, Heidelberg : Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-59495-3_5.

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Stärk, Robert F., Joachim Schmid et Egon Börger. « The exception-handling extension Javaε of $${\text{Jav}}{{\text{a}}_\mathcal{O}}$$ ». Dans Java and the Java Virtual Machine, 87–94. Berlin, Heidelberg : Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-59495-3_6.

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Hashemi, Michaela. « Ke stereotypu zobrazování Turka ve starší české literatuře ». Dans Filosofie jako životní cesta, 153–57. Brno : Masaryk University Press, 2019. http://dx.doi.org/10.5817/cz.muni.p210-9458-2019-10.

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The text is a reflection of a well-researched professional publication by Tomáš Rataj České země ve stínu půlměsíce (Czech Lands in the Shadow of the Crescent, 2002). After a multilateral acknowledgement of the book, the author fills in relevant items written by some of the staff of the Faculty of Arts MU, some of which were published only after the publication of Rataj’s work. Additionally, she refines, with reference to the study of Jan Kumpera (1994), the existence of a translation of the Bible into Turkish initiated by Comenius, namely its printing in the 19th century. At the end, the author mentions her personal teaching activities on the topic in the context of the honoured person of Jan Zouhar’s personality as a pedagogical ideal.
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Actes de conférences sur le sujet "Jar test"

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Rodrigues, G. C., et S. J. Hensel. « A Pre-Shipment Gas Generation Test Using a Bell Jar ». Dans ASME 2002 Pressure Vessels and Piping Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/pvp2002-1608.

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The primary purpose of a bell jar is to collect and measure out gassing from a container (e.g., food can) of plutonium bearing materials to evaluate potential pressurization within a shipping package containment vessel. The bell jar allows for testing of the actual cans to be shipped without repackaging or taking samples of the materials. Pressurization of the bell jar can be readily extrapolated to the conditions inside the shipping container containment vessel during a shipment. Bell jar testing is being used in conjunction with current plutonium surveillance techniques (lid deflection measuring) to demonstrate that the cans bearing plutonium material may be shipped safely across the Savannah River Site for processing. Statistical sampling of similar materials leverages the testing such that only population subsets need be tested. The pressurization (or depressurization) measured in the bell jar to date has been very small and of no concern from a shipping perspective.
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Hensel, S. J., et G. C. Rodrigues. « Test Results Using a Bell Jar to Measure Containment Vessel Pressurization ». Dans ASME 2002 Pressure Vessels and Piping Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/pvp2002-1616.

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A bell jar is used to determine containment vessel pressurization due to outgassing of plutonium materials. Fifteen food cans containing plutonium bearing materials, including plutonium packaged in direct contact with plastic and plutonium contaminated enriched uranium oxide have been tested to date. As expected, minimal pressurization occurs and in some cases a slight depressurization has been observed. Linear extrapolation of the greatest pressurization observed in the bell jar to a typical drum shipping container (such as a 9975) has been performed. Pressurization from this particular can packaged for one year in a 9975 container is negligible.
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MORGON ARRUDA, PRISCILA, et ENELTON FAGNANI. « Otimização do Ensaio de Jar Test utilizando-se técnicas quimiométricas ». Dans XXIV Congresso de Iniciação Científica da UNICAMP - 2016. Campinas - SP, Brazil : Galoa, 2016. http://dx.doi.org/10.19146/pibic-2016-51450.

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Ho, Kimberley, Tao Chen, Ping Chen, Thomas Hagen, Harry Montgomerie et Ronald Benvie. « Development of Novel Test Methodology to Understand the Mechanisms of Halite Inhibition and Environmentally Acceptable Halite Scale Inhibitors for High Temperature Application ». Dans SPE International Oilfield Scale Conference and Exhibition. SPE, 2014. http://dx.doi.org/10.2118/spe-169803-ms.

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Abstract Halite deposition is most commonly observed in gas/gas condensate fields with low water cut, high TDS produced brines and high temperature. Halite is notoriously difficult to inhibit and there are limited studies focused on halite due to it being incredibly challenging to have an effective test methodology under laboratory conditions that reflect the field conditions. The mechanisms of halite inhibition are unclear. In the published literature, static jar testing is primarily used to evaluate the performance of halite inhibitors. It is not representative of dynamic field conditions and provides limited information of halite inhibition. A new methanol driven dynamic test methodology has been developed alongside a novel jar test procedure, which together provides an effective methodology to evaluate halite inhibition under both static and dynamic conditions and provides an insight into the understanding of the mechanisms of halite inhibition. Using these novel test methodologies, four short-listed inhibitor chemistries including environmentally acceptable inhibitors were assessed and categorised into two types based on the understanding of the mechanism. ➤ Nucleation/growth inhibitors. Inhibitors reduce the nucleation/growth of halite crystals and give good performance under both static and dynamic test conditions.➤ Dispersion inhibitors. Inhibitor doesn't stop the nucleation/growth of halite crystals and gives poor performance under static conditions, but good performance under dynamic conditions due to dispersion effect. Both types of halite inhibitors have been successfully deployed in the fields through continuous injection or batch treatment. Coreflood tests were carried out to confirm the potential risk of formation damage during downhole batch treatment. Other deployment methods have been discussed such as through methanol injection line as both inhibitors are fully methanol compatible. This paper will give a comprehensive study of halite inhibition for challenged wells, including prediction, novel methodology, program of laboratory qualification, mechanism understanding and field deployment, coupled to the development of a chemical technology toolbox to design field halite applications. The value that a fuller understanding of halite control gives the industry is the ability to reduce/eliminate water wash application to control halite formation and so improve well operation time. If halite inhibition is considered at the capex phase of field development, provisions can be made for chemical injection facilities to maintain uninterrupted production.
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Kutz, Philipp W., Frank Otremba, Jan Werner et Christian Sklorz. « Development of a Single Walled Tank Under Cryogenic Conditions Made of Composite ». Dans ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-86365.

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The use of glass-fiber reinforced plastic (GRP) can reduce the weight of tanks significantly. By replacing steel with GRP in tanks for gases (propane, etc.) a weight reduction of up to 50 % was reached. In this project not only the material should be optimized, but also the design. Previous tanks consist of a double-walled structure with an insulation layer between the two shells (e.g. vacuum). Goal of this project is to realize a single-walled construction of GRP with an insulation layer on the outside. To determine the temperature dependent material values, two different experiments are performed: In the first experiment, temperature dependent material properties of liquid nitrogen found in literature research are validated in a simple setup. The level of liquid nitrogen in a small jar is measured over the experiment time. Numerical simulation shows the change of nitrogen level with sufficient precision. In the second experiment, a liquid nitrogen is applied on one side of a GRP plate. Temperature is measured with thermocouples on top and bottom of the GRP plate, as well as in the middle of the plate. By use of numerical simulation, temperature dependent thermal conductivity is determined. In the third experiment, a test stand is designed to examine different insulation materials. In this test stand, the insulation material can easily be changed. A numerical simulation, in which the determined material data is used, is performed as well for this test stand. The experiments show, that GRP can be used in cryogenic environments. Multiphase simulations are a suitable tool to describe the energy absorption of thermal energy due to thermal phase change. Results on different insulation materials will follow.
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Hart, Megan L., Ryan Holmes, John T. Kevern et Alexander A. Silvius. « Heavy Metals Sorption by Drinking Water Treatment Byproducts in Jar Tests ». Dans Geo-Chicago 2016. Reston, VA : American Society of Civil Engineers, 2016. http://dx.doi.org/10.1061/9780784480168.004.

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Coelho, Roberta, Elder Cirilo, Uira Kulesza, Arndt von Staa, Awais Rashid et Carlos Lucena. « JAT : A Test Automation Framework for Multi-Agent Systems ». Dans 2007 IEEE International Conference on Software Maintenance. IEEE, 2007. http://dx.doi.org/10.1109/icsm.2007.4362655.

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Hensel, Steve J., et Jonathan R. Kies. « Gas Analysis of Plutonium Materials Tested in a Bell Jar ». Dans ASME 2003 Pressure Vessels and Piping Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/pvp2003-2135.

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Seventy cans containing plutonium bearing materials have been tested for gas generation in bell jars at the Savannah River Site (SRS). Gas samples from five of the tests were taken and analyzed for hydrogen, oxygen, nitrogen, methane, carbon dioxide, carbon monoxide, and nitrous oxide. Gas samples from all five cans showed significant oxygen consumption. Hydrogen and carbon dioxide were found in non-negligible quantities in all gas samples. Hydrogen and carbon dioxide generation rates are presented along with oxygen depletion rates. A description of the plutonium bearing materials is also provided.
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Niewöhner, M. « 6.2 - Sabotage and Disclosure of Flight Test and other reasons & ; methods to intercept, jam or spoof telemetry ». Dans ettc2018 - European Test and Telemetry Conference. AMA Service GmbH, Von-Münchhausen-Str. 49, 31515 Wunstorf, Germany, 2018. http://dx.doi.org/10.5162/ettc2018/6.2.

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Hertamawati, Rosa Tri, et Abid Muhammad. « Perbaikan Kualitas Tepung Putih Telur Ayam Ras dengan Fermentasi Menggunakan Ragi Tempe ». Dans Kedaulatan Pangan Nasional Melalui Pengembangan Potensi Ternak Lokal di Era Kenormalan Baru. Animal Science : Polije Proceedings Series, 2020. http://dx.doi.org/10.25047/proc.anim.sci.2020.23.

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Penelitian ini bertujuan untuk mengetahui pengaruh lama waktu fermentasi ragi tempe yang berbeda terhadap kualitas tepung putih telur. Metode penelitian menggunakan rancangan acak lengkap (RAL). Perlakuan lama waktu fermentasi yang digunakan yaitu P0 (tanpa fermentasi), P1 (6 jam), P2 (12 jam), dan P3 (24 jam) dengan 5 ulangan. Parameter yang diamati adalah kadar protein, kadar air, kadar abu, dan warna. Data hasil uji kadar protein, kadar air, kadar abu, dan warna dianalisis dengan analisis variansi dan diuji lanjut dengan uji Duncan Multiple Range Test. Hasil penelitian menunjukkan bahwa lama fermentasi ragi tempe yang berbeda meningkatkan kadar protein, dan menurunkan kadar air, kadar abu, dan skor warna tepung putih telur. Lama fermentasi ragi tempe selama 6 jam dapat memperbaiki kualitas tepung putih telur ayam ras.
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Rapports d'organisations sur le sujet "Jar test"

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Cesaratto, J. M. Power Amplifier Test, Jan. 17th 2013. Office of Scientific and Technical Information (OSTI), mai 2014. http://dx.doi.org/10.2172/1131458.

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Birk, Avi, Miguel Del Guercio, Amy Kinkennon, Douglas E. Kooker et Pamela Kaste. Electrothermal-Chemical (ETC) Closed-Chamber Interrupted-Burning Tests With JA2 and M30 Solid Propellants. Fort Belvoir, VA : Defense Technical Information Center, novembre 2000. http://dx.doi.org/10.21236/ada391484.

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Venäläinen, Ari, Sanna Luhtala, Mikko Laapas, Otto Hyvärinen, Hilppa Gregow, Mikko Strahlendorff, Mikko Peltoniemi et al. Sää- ja ilmastotiedot sekä uudet palvelut auttavat metsäbiotaloutta sopeutumaan ilmastonmuutokseen. Finnish Meteorological Institute, janvier 2021. http://dx.doi.org/10.35614/isbn.9789523361317.

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Climate change will increase weather induced risks to forests, and thus effective adaptation measures are needed. In Säätyö project funded by the Ministry of Agriculture and Forestry, we have summarized the data that facilitate adaptation measures, developed weather and climate services that benefit forestry, and mapped what kind of new weather and climate services are needed in forestry. In addition, we have recorded key further development needs to promote adaptation. The Säätyö project developed a service product describing the harvesting conditions of trees based on the soil moisture assessment. The output includes an analysis of the current situation and a 10-day forecast. In the project we also tested the usefulness of long forecasts beyond three months. The weather forecasting service is sidelined and supplemented by another co-operation project between the Finnish Meteorological Institute and Metsäteho called HarvesterSeasons (https://harvesterseasons.com/). The HarvesterSeasons service utilizes long-term forecasts of up to 6 months to assess terrain bearing conditions. A test version of a wind damage risk tool was developed in cooperation with the Department of Forest Sciences of the University of Eastern Finland and the Finnish Meteorological Institute. It can be used to calculate the wind speeds required in a forest area for wind damage (falling trees). It is currently only suitable for researcher use. In the Säätyö project the possibility of locating the most severe wind damage areas immediately after a storm was also tested. The method is based on the spatial interpolation of wind observations. The method was used to analyze storms that caused forest damages in the summer and fall of 2020. The produced maps were considered illustrative and useful to those responsible for compiling the situational picture. The accumulation of snow on tree branches, can be modeled using weather data such as rainfall, temperature, air humidity, and wind speed. In the Säätyö project, the snow damage risk assessment model was further developed in such a way that, in addition to the accumulated snow load amount, the characteristics of the stand and the variations in terrain height were also taken into account. According to the verification performed, the importance of abiotic factors increased under extreme snow load conditions (winter 2017-2018). In ordinary winters, the importance of biotic factors was emphasized. According to the comparison, the actual snow damage could be explained well with the tested model. In the interviews and workshop, the uses of information products, their benefits, the conditions for their introduction and development opportunities were mapped. According to the results, diverse uses and benefits of information products and services were seen. Information products would make it possible to develop proactive forest management, which would reduce the economic costs caused by wind and snow damages. A more up-to-date understanding of harvesting conditions, enabled by information products, would enhance the implementation of harvesting and harvesting operations and the management of timber stocks, as well as reduce terrain, trunk and root damage. According to the study, the introduction of information is particularly affected by the availability of timeliness. Although the interviewees were not currently willing to pay for the information products developed in the project, the interviews highlighted several suggestions for the development of information products, which could make it possible to commercialize them.
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Wurl, Oliver. Biofilm-like habitat at the sea-surface : A mesocosm study, Cruise No. POS537, 14.09.2019 – 04.10.2019, Malaga (Spain) – Cartagena (Spain) - BIOFILM. University of Oldenburg, novembre 2020. http://dx.doi.org/10.3289/cr_pos537.

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OceanRep OceanRep Startseite Kontakt Schnellsuche Einfache Suche Erweiterte Suche Blättern Autor Forschungsbereich Publikationsart Jahr Studiengang Neuzugänge Artikel – begutachtet Alle Über uns GEOMAR Bibliothek Open Access Policies Grundsätze Hilfe FAQs Statistik Impressum Biofilm-like habitat at the sea-surface: A mesocosm study, Cruise No. POS537, 14.09.2019 – 04.10.2019, Malaga (Spain) – Cartagena (Spain) - BIOFILM . Logged in as Heidi Düpow Einträge verwaltenManage recordsManage shelvesProfilGespeicherte SuchenBegutachtungAdminLogout - Tools Wurl, Oliver, Mustaffa, Nur Ili Hamizah, Robinson, Tiera-Brandy, Hoppe, Jennifer, Jaeger, Leonie, Striebel, Maren, Heinrichs, Anna-Lena, Hennings, Laura Margarethe, Goncalves, Rodrigo, Ruiz Gazulla, Carlota und Ferrera, Isabel (2020) Biofilm-like habitat at the sea-surface: A mesocosm study, Cruise No. POS537, 14.09.2019 – 04.10.2019, Malaga (Spain) – Cartagena (Spain) - BIOFILM . Open Access . POSEIDON Berichte . University of Oldenburg, Oldenburg, 35 pp. [img] Text Cruise_Reports_POS537_final.pdf - publizierte Version Available under License Creative Commons: Attribution 4.0. Download (2417Kb) | Vorschau Abstract Biofilm-like properties can form on sea surfaces, but an understanding of the underlying processes leading to the development of these biofilms is not available. We used approaches to study the development of biofilm-like properties at the sea surface, i.e. the number, abundance and diversity of bacterial communities and phytoplankton, the accumulation of gel-like particles and dissolved tracers. During the expedition POS537 we used newly developed and free drifting mesocosms and performed incubation experiments. With these approaches we aim to investigate the role of light and UV radiation as well as the microbes themselves, which lead to the formation of biofilms. With unique microbial interactions and photochemical reactions, sea surface biofilms could be biochemical reactors with significant implications for ocean and climate research, e.g. with respect to the marine carbon cycle, diversity of organisms and oceanatmosphere interactions.
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