Academic literature on the topic 'Biological oxygen consumption'
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Journal articles on the topic "Biological oxygen consumption"
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Leung, S. M., J. C. Little, T. Holst, and N. G. Love. "OXYGEN TRANSFER AND CONSUMPTION IN A BIOLOGICAL AERATED FILTER." Proceedings of the Water Environment Federation 2003, no. 6 (January 1, 2003): 51–69. http://dx.doi.org/10.2175/193864703784641856.
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Klekowski, Romuald Z., and Krzysztof W. Opalinski. "Oxygen consumption in Tardigrada from Spitsbergen." Polar Biology 9, no. 5 (April 1989): 299–303. http://dx.doi.org/10.1007/bf00287427.
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KANBE, Chiyuki, and Kinji UCHIDA. "Oxygen consumption by Pediococcus halophilus." Agricultural and Biological Chemistry 49, no. 10 (1985): 2931–37. http://dx.doi.org/10.1271/bbb1961.49.2931.
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Chaui-Berlinck, José Guilherme, José Eduardo P. W. Bicudo, Luiz Henrique A. Monteiro, and Carlos Arturo Navas. "Oscillatory pattern in oxygen consumption of Hummingbirds." Journal of Thermal Biology 27, no. 5 (October 2002): 371–79. http://dx.doi.org/10.1016/s0306-4565(02)00005-0.
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Saad, Noor Aida, Hamidi Abdul Aziz, Mohd Zulkifly Abdullah, Mohamed Zubair, and M. A. Z. Mohd Remy Rozainy. "Oxygen Uptake by Biological Processes inside Oxidation Ditch." Applied Mechanics and Materials 802 (October 2015): 490–95. http://dx.doi.org/10.4028/www.scientific.net/amm.802.490.
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Abstract. In order to provide a better understanding of the Orbal Biological System (OBS), as one type of a modified oxidation ditch, the research aims to develop a preliminary process model to visualize the oxygen uptake by biological processes inside the oxidation ditch. Fundamentally, the model can be used as initial study to get a clearer picture of the oxygen utilization rate inside the ditch. Based on the results, the outer channel takes the highest portion of the overall oxygen consumption which is 66 % compare to the middle channel with only 14 % and followed by the inner channel with 20 %. However, simplifying assumptions made for the preliminary process model development (e.g. constant values of HRT throughout each channel) may affect the accuracy of describing the real conditions of the system.
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Bengtsson, Lars, and Osama Ali-Maher. "The dependence of the consumption of dissolved oxygen on lake morphology in ice covered lakes." Hydrology Research 51, no. 3 (February 13, 2020): 381–91. http://dx.doi.org/10.2166/nh.2020.150.
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Abstract The consumption of oxygen in ice-covered lakes is analyzed and related to biological oxygen demand and sediment oxygen demand. An approach for computing dissolved oxygen concentration is suggested assuming horizontally mixed waters and negligable vertical dispersion. It is found that the depletion of dissolved oxygen is mainly due to the transfer of oxygen at the water/sediment interface. The morphology of a lake is very important for how fast the dissolved oxygen concentration is reduced during winter.
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Gollmer, Anita, Johannes Regensburger, Tim Maisch, and Wolfgang Bäumler. "Luminescence spectroscopy of singlet oxygen enables monitoring of oxygen consumption in biological systems consisting of fatty acids." Physical Chemistry Chemical Physics 15, no. 27 (2013): 11386. http://dx.doi.org/10.1039/c3cp50841b.
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Hendrix, Rik H. J., Yuri M. Ganushchak, and Patrick W. Weerwind. "Oxygen delivery, oxygen consumption and decreased kidney function after cardiopulmonary bypass." PLOS ONE 14, no. 11 (November 22, 2019): e0225541. http://dx.doi.org/10.1371/journal.pone.0225541.
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Sierra, J., and P. Renault. "Oxygen consumption by soil microorganisms as affected by oxygen and carbon dioxide levels." Applied Soil Ecology 2, no. 3 (September 1995): 175–84. http://dx.doi.org/10.1016/0929-1393(95)00051-l.
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van der Aa, L. T. J., L. C. Rietveld, and J. C. van Dijk. "Effects of ozonation and temperature on the biodegradation of natural organic matter in biological granular activated carbon filters." Drinking Water Engineering and Science 4, no. 1 (January 28, 2011): 25–35. http://dx.doi.org/10.5194/dwes-4-25-2011.
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Abstract. Four pilot (biological) granular activated carbon ((B)GAC) filters were operated to quantify the effects of ozonation and water temperature on the biodegradation of natural organic matter (NOM) in (B)GAC filters. The removal of dissolved organic carbon (DOC), assimilable organic carbon (AOC) and oxygen and the production of carbon dioxide were taken as indicators for NOM biodegradation. Ozonation stimulated DOC and AOC removal in the BGAC filters, but had no significant effect on oxygen consumption or carbon dioxide production. The temperature had no significant effect on DOC and AOC removal, while it had a positive effect on oxygen consumption and carbon dioxide production. Multivariate linear regression was used to quantify these relationships. In summer, the ratio between oxygen consumption and DOC removal was approximately 2 times the theoretical maximum of 2.6 g O2 g C−1 and the ratio between carbon dioxide production and DOC removal was approximately 1.5 times the theoretical maximum of 3.7 g CO2 g C−1. The production and loss of biomass, the degassing of (B)GAC filters, the decrease in the NOM reduction degree and the temperature effects on NOM adsorption could only partly explain these excesses and the non-correlation between DOC and AOC removal and oxygen consumption and carbon dioxide production. It was demonstrated that bioregeneration of NOM could explain the excesses and the non-correlation. Therefore, it was likely that bioregeneration of NOM did occur in the (B)GAC pilot filters.
Dissertations / Theses on the topic "Biological oxygen consumption"
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Губиш, Валерія Володимирівна. "Технологія біологічного очищення стічних вод шкірзаводу та міста Бердичів." Bachelor's thesis, КПІ ім. Ігоря Сікорського, 2020. https://ela.kpi.ua/handle/123456789/34461.
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Дипломний проект складається з 77 сторінок пояснювальної записки та 3 аркушів креслень А1. Пояснювальна записка містить вступ, 5 розділів, що включають 4 рисунка та 7 таблиць, висновки, 30 посилань на літературні джерела та додаток.
Метою дипломного проекту є підбір та обґрунтування найбільш вигідної та ефективної технологічної схеми для попереднього очищення стічних вод шкірзаводу, а також проведення розрахунків для проектування споруди біологічної очистки та розробки технологічної схеми очищення суміші стічних вод міста Бердичів та шкірзаводу.
В проекті було охарактеризовано склад та фізико-хімічні властивості стічних вод шкірзаводу; обрано та обґрунтовано технологію попереднього очищення стічних вод шкірзаводу; розраховано показники стічних вод та необхідний ступень їх очищення; обрано та обгрунтовано технологію біологічного очищення суміші стічних вод міста Бердичів та шкірзаводу; описані біохімічні процеси в споруді біологічного очищення; надано характеристику біологічного агенту; наведено параметри контролю технології біологічного очищення; розраховано матеріальний баланс процесу очищення; здійснено розрахунки основних біологічних споруд. Також було розроблено апаратурну та технологічну схему біологічного очищення суміші стічних вод міста Бердичів та шкірзаводу, а також креслення аеротенку.The diploma project consists of 77 pages of explanatory note and 3 sheets of drawings A1. The explanatory note contains an introduction, 5 sections, including 4 figures and 7 tables, conclusions, 30 references and an appendix. The purpose of the diploma project is to select and substantiate the most beneficial technological scheme for preliminary tannery wastewater treatment of the, as well as calculations of biological treatment facilities and development of process flowsheet for city of Berdychiv and tannery wastewater treatment. The project describes the composition and physical and chemical properties of the plant tannery wastewater; the technology of preliminary tannery wastewater treatment technology is selected and substantiated; wastewater characteristics s and the required treatment degree of their treatment are calculated; the technology of biological treatment of a mixture of city and tannery wasterwater is chosen and substantiated; biochemical processes in the biological treatment plant are described; the characteristic of the biological agent is given; parameters of control of biological treatment technology are given; the material balance of the cleaning process is calculated; calculations of the basic biological constructions are carried out. An hardware and process flowsheet the city of Berdychiv and tannery biological wastewater treatment , as well as a drawing of an aeration tank were worked up.
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Денисенко, Наталя Вікторівна. "Біологічне очищення стічних вод м. Калуш і деревообробного заводу." Bachelor's thesis, КПІ ім. Ігоря Сікорського, 2019. https://ela.kpi.ua/handle/123456789/28515.
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Об'єм дипломного проекту складає 3 аркуші креслень А1, 70 аркушів пояснювальної записки, з використанням 27 літературних джерел. Робота складається з вступу, п’яти розділів, висновків nf списку літературних посилань.
Метою даного дипломного проекту є вибір та обгрунтування технології попередньої очистки стічних вод деревообробного заводу, розрахунок і проектування очисних споруд. Поставлена мета досягається шляхом встановлення, на основі аналізу літературних даних, характеристики стічних вод деревообробного заводу; розгляду існуючих технологій очищення стічних вод деревообробного заводу; вибору технології очищення стічних вод деревообробного заводу; розрахунку складу стічних вод по завислим речовинам, БСК повне та ПАР; розрахунку необхідного ступеня очищення стічних вод; вибору технології біологічного очищення стічних вод міста; виконання технологічних розрахунків очисних споруд біологічного очищення. Також виконана графічна частина дипломного проекту, яка складається з трьох креслень формату А 1. Перше креслення – апаратурна схема біологічного очищення стічних вод міста та заводу, друга - технологічна схема біологічного очищення стічних вод міста та заводу, третє креслення – біофільтр.
Усі розрахунки та креслення виконані згідно чинних стандартів та з використанням сучасних системних та інформаційних технологій.
У роботі виконаний аналіз результатів та зроблені висновки. Наведено список використаної літератури.The diploma project consists of 3 sheets of drawings A1, 70 sheets of explanatory note, 27 references. The work consists of an introduction, five sections, conclusions and literary references. The purpose of this diploma project is to select and justify the technology of preliminary wastewater treatment of a wood processing plant, calculation and design of treatment facilities. The objective is achieved by establishing, on the basis of analysis of literary data, the characteristics of waste water of a wood processing plant; consideration of existing wastewater treatment technologies for a wood processing plant; selection of wastewater treatment technology for a wood processing plant; calculation of the composition of wastewater for suspended solids, BOD and surfactants; calculation of the required degree of wastewater treatment; the choice of the technology of biological wastewater treatment of the city; technological calculation of biological equipment. Also, the graphic part of the diploma project, which consists of three drawings of A1 format, is executed. The first sheet is an apparatus scheme of biological wastewater treatment of the city and the plant, the second is the technological scheme of biological wastewater treatment of the city and the plant, the third is a biofilter. All calculations and sheets are executed according to current standards and using modern system and information technologies. The analyzes of the results and conclusions are made. The list of the sources is given.
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Crampes, François. "Adaptations de l'organisme à l'exercice de longue durée chez l'homme : rôle de l'activité lipolytique." Toulouse 3, 1988. http://www.theses.fr/1988TOU30035.
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Corriere, Mauro. "Effects of okadaic acid and dinophysistoxins on swimming and metabolic fitness of marine fish." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18164/.
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Harmful algal blooms (HABs) are natural occurrences that can severely impact marine communities. Depending on the species, they can produce a wide array of toxins, which may elicit devastating effects on marine life. Diarrhetic Shellfish Poisoning (DSP) is a specific type of food poisoning, characterized by severe gastrointestinal illness due to the ingestion of filter feeding bivalves contaminated with a specific suite of toxins such as okadaic acid (OA) and dinophysistoxins (DTXs). OA and DTXs are lipophilic and heat-stable compounds that frequently accumulate in bivalve mollusks along European coasts. It is established that organisms such as bivalves accumulate these toxins in their tissues, mostly in the digestive gland, through their filter feeding behavior acting therefore as a vectors for other organisms such as planktivorous fish. Here, for the first time, the time course of accumulation and elimination of Diarrhetic shellfish toxins (DSTs) in juveniles of Zebra seabream (Diplodus cervinus) was assessed during an experimental period of 15 days. It was shown that fish present a high excretion rate and low toxin conversion, in fact no other compounds except for DTX-1 were found. Then fish aerobic metabolism and swimming performance were investigated, exposing individuals to OA group of toxins via dietary route during 3 days, after which fish were challenged with increasing swimming velocity trials using a swim tunnel respirometer. Results show that OA impaired on metabolic performance, assessed both during the standard metabolic rate (SMR) and during the maximum metabolic rate (MMR) as an oxygen consumption increment. Moreover, from critical swimming speed (Ucrit) analysis, significant differences among the two tested groups were observed. In conclusion, these studies show that fish can act temporary as a vector and, although a high elimination rate was found, at the same time toxins ingestion was able to impair their fitness.
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Silva, Caroline Cristina. "Participação dos receptores opióides mu e kappa da substância cinzenta periaquedutal na febre induzida por estresse de contenção." Universidade Federal de São Carlos, 2016. https://repositorio.ufscar.br/handle/ufscar/7705.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
The endogenous opioids are involved in analgesia, thermoregulation and physiological responses to various stressful stimuli such as infection, psychological stress and hypoxia. The mu and kappa receptors in the hypothalamus play a role in endotoxin-induced fever and hypoxia-induced anapyrexia (opposite response to fever), respectively. In addition, periaqueductal gray (PAG), which express both mu and kappa receptors, is involved in defence and thermoregulatory responses. Thus, our hypothesis is that mu and kappa opioid receptors in the PAG modulate the restraint-induced fever in rats by activating and inhibiting this response, respectively. To this end, body temperature (Tb) and heat loss index (HLI; inference for heat conservation/loss) and oxygen consumption (VO ; inference for thermogenesis) of unanesthetized Wistar rats submitted or not to restraint stress, was monitored before and after intra-PAG microinjection of the selective mu opioid receptor antagonist (CTAP; 1 and 10 μg/ 100 nL/ animal), the selective kappa-opioid receptor antagonist (nor-BNI; 1 and 4 μg/ 100 nL/ animal), or vehicle (saline; 100nL/ animal). CTAP and nor-BNI did not change the Tb or the HLI of the animals in euthermia. During the restraint stress, Tb increased in all groups of animals. However, this effect was significantly lower in animals treated with CTAP, and significantly higher in animals treated with nor-BNI. No treatment affected HLI, but CTAP decreased thermogenesis and nor-BNI increased thermogenesis. The results indicate that the mu and kappa opioid receptors in the PAG of rats play a pyrogenic and antipyretic role, respectively, during fever induced by restraint stress and these receptors in PAG may not be essential for the maintenance of Tb during euthermia.
Os opióides endógenos estão envolvidos na analgesia, termorregulação e respostas fisiológicas a vários estímulos estressantes, como infecção, estresse psicológico e hipóxia. Os receptores mu e kappa no hipotálamo desempenham um papel na febre induzida por endotoxina e anapirexia induzida por hipoxia (resposta oposta à febre), respectivamente. Além disso, a substância cinzenta periaquedutal (PAG), que expressa ambos os receptores mu e kappa, está envolvida na defesa e respostas de termorregulação. Assim, nossa hipótese é que os receptores opióides mu e kappa na PAG modulam a febre induzida por contenção em ratos, ativando e inibindo esta resposta, respectivamente. Para este fim, a temperatura corporal (Tc) e o índice de perda de calor (IPC; inferência para a conservação/perda de calor) e o consumo de oxigênio (VO ; inferência para a termogênese) de ratos Wistar não anestesiados submetidos ou não ao estresse contenção, foi monitorado antes e depois microinjeção intra-PAG do antagonista seletivo do receptor opióide mu (CTAP; 1 e 10 μg/ 100 nL/ animal), antagonista seletivo do receptor opióide kappa (nor-BNI; 1 e 4 μg/ 100 nL/ animal) ou veículo (solução salina; 100 nL / animal). A microinjeção de CTAP ou nor-BNI não alterou a Tc ou IPC dos animais em eutermia. Durante o estresse de contenção, a Tc aumentou em todos os grupos de animais. No entanto, este efeito foi significativamente menor no grupo de animais tratados com CTAP, e significativamente maior em animais tratados com nor-BNI. Nenhum tratamento afetou o IPC, mas o CTAP diminuiu a termogênese e o nor-BNI aumentou a termogênese. Os resultados indicam que os receptores opióides mu e kappa na PAG de ratos desempenham um papel pirogênico e antipirético, respectivamente, durante a febre induzida pelo estresse de contenção e estes receptores na PAG podem não ser essenciais para a manutenção de Tc durante eutermia.
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Jorge, Roberta Adriana De La Verne da Cruz. "Avaliação de impacto ambiental sobre o ecossistema marinho utilizando larvas de mexilhões (Perna perna) (Linnaeus, 1758) (Mollusca:Bivalvia) como bioindicadores, através de técnicas ecotoxicológicas." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/18/18139/tde-14102016-161855/.
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Algumas atividades antrópicas podem provocar alterações nos recursos naturais, seja ela no rio, no solo ou no mar. Os efeitos destas alterações podem ser observados na biota, na qualidade das águas, na disponibilidade de nutrientes, interferindo em todos os elementos que compõem o ecossistema, influenciando-o em maior ou menor grau. O presente estudo procurou determinar o efeito dos poluentes sulfato de zinco, cloreto de amônia, dodecilsulfato de sódio e benzeno, numa espécie bioindicadora marinha, el larvas de mexilhão (Perna perna), além de acrescentar dados sobre a biologia e analisar quimicamente a presença de hidrocarbonetos nos tecidos dos animais adultos e das larvas. Para tanto foram utilizados testes de toxicidade, estudos sobre a bioenergética (consumo de oxigênio e excreção de amônia), enzimas biomarcadoras e excreção de fósforo e nitrogênio. Com relação à biologia, foram encontrados indivíduos sexualmente maduros a partir de 26,1 e 27 mm de comprimento para fêmeas e machos, respectivamente, e há diferença, ainda que esta não seja estatisticamente significativa, entre ovócitos e larvas submetidos a ação de poluentes. A análise de hidrocarbonetos indicou que existe uma contribuição biogênica e petrogênica no litoral norte do Estado de São Paulo. Para as demais análises verificou-se que, quando comparados aos grupos controles, as larvas foram sensíveis e responderam aos diferentes poluentes, geralmente com inibição da atividade.Some antropic activities may be the cause fo alterations in natural resources, being it river, soil or sea. These alteration effects may be observed in the biota, water quality, nutrients disponibility, interfering with all elements that are part of a ecosystem, with greater or lesser influence degree. The present study was directed to determine the effect of pollutants, such as zinc sulphate, ammonia chlorate, sodium dodecilsulphate and benzene, acting over larvae of a marine bioindicator, the mussel (Perna perna), besides adding data on biology and chemically analysing hidrocarbon presence in larvae and adult animal tissues. In order to obtain these results, toxicity tests were used and bioenergetic (oxygen consumption and ammonia excretion), biomarkers, phosphorus and nitrogen excretion, were studied. As for biology, individuals sexually mature were found starting with 26,1 and 27 mm length females and males, respectively, and there is difference between larvae and ovocites, although statistically not significant, submitted to pollutants action. The hydrocarbon analysis indicates a biogenic and petrogenic contribution to north coast of São Paulo State. For the other analyses the observed results, when compared to control groups, showed that larvae are sensitive, and responded to different pollutants, generally with activity inhibition.
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Souza, Cristiane Pereira de. "Metabolismo de carboidratos e de lipídeos durante o exercício na intensidade do limiar ventilatório e o período de recuperação de mulheres obesas." Universidade Federal de São Carlos, 2008. https://repositorio.ufscar.br/handle/ufscar/1303.
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Previous issue date: 2008-06-27Financiadora de Estudos e Projetos
The inability to oxidize fat is a key factor in the etiology of obesity. However, improved performance and VO2max resulting from physical training leads to increased rates of oxidation of fats. Although, there is still a lack of information about the intensity of exercise can interfere with metabolism of carbohydrates and lipids in obese women during a session of exercise and its recovery, because only in an experimental study there is a negative relationship of obesity on the reinstatement of power after a year. Therefore, this study aims to assess the behavior of the metabolism of carbohydrates and lipids in moderately obese women on a test of acute exercise effects on the intensity of ventilatory threshold and the recovery period, in the stage of pre-and post-training physical. This study had the participation of seven women slightly obese (BMI=4.03 kg/m2), with an average age of 43.0 ± 4.0 years, 163 ± 0.2±33.59 cm and previously sedentary who were submitted to the ergospirometry acute test before and after 16 weeks of training in the intensity of ventilatory threshold. During the test respiratory quotient was evaluated to determine the fats and carbohydrates oxidation during exercise and recovery period. The results found that the volunteers used predominantly the energy that comes from carbohydrates during the session of exercise (67.64% and 69.35% of the total spent provided pre-and post-training, respectively). During recovery the percentage of the fats contribution increase of (46.52% of the total oxidized) to the total energy generated, which discreetly marked with training (53.48% of the total oxidized). Based on the findings was observed that the metabolism of carbohydrates provides the muscle contraction support during the exercise in the intensity of ventilatory threshold and that the recovery period lipid metabolism is the counterpart to repay the body stores energy in obese women.
A inabilidade de oxidar gorduras é um fator chave na etiologia da obesidade. No entanto, a melhoria de performance e do VO2max advinda do treinamento físico leva a um aumento das taxas de oxidação de gorduras. Porém, ainda faltam esclarecimentos sobre como a intensidade do exercício pode interferir no metabolismo de carboidratos e de lipídeos de mulheres obesas durante uma sessão de exercício e a sua recuperação, já que apenas em estudo experimental observa-se a relação negativa da obesidade sobre a reposição da energia após um exercício. Sendo assim, o objetivo do presente estudo é de verificar o comportamento do metabolismo de carboidratos e de lipídeos de mulheres moderadamente obesas sobre efeito de um teste agudo de exercício na intensidade do limiar ventilatório e o seu período de recuperação, na condição pré e pós-treinamento físico. Para tanto, o estudo contou com a participação de sete mulheres levemente obesas (IMC=33,59 ± 4,03 Kg/m2), com média de idade de 43,0 ± 4,0 anos, 163 ± 0,2 cm e previamente sedentárias que foram submetidas ao teste agudo de ergoespirometria, no inicio e após transcorridas 16 semanas de treinamento na intensidade do limiar ventilatório. Durante o teste foi avaliado o quociente respiratório para determinação da oxidação de gorduras e de carboidratos durante o exercício e o seu período de recuperação. Com base nos resultados obtidos verificou-se que as voluntárias utilizam predominantemente a energia que advém de carboidratos durante a sessão de exercício (67,64 % e 69,35 % do total oxidado na condição pré e pós-treinamento, respectivamente). Durante a recuperação as gorduras aumentam o percentual de contribuição (46,52 % do total oxidado) para o total de energia gerada, condição discretamente acentuada com o treinamento (53,48 % do total oxidado). Com base nos achados acredita-se que o metabolismo de carboidratos oferece suporte para a contração muscular durante o exercício físico na intensidade do limiar ventilatório e que no período de recuperação o metabolismo lipídico faz a contrapartida para reposição dos estoques de energia corporal em mulheres obesas.
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OLBERT, Karel. "Vyhodnocení účinnosti mechanického a nitrifikačního biologického filtru při provozu recirkulačního systému s intenzivním chovem ryb." Master's thesis, 2008. http://www.nusl.cz/ntk/nusl-48880.
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Aim of my work is influence of high level breeding of Euroasian perch on quality of water and operation of mechanicle drum filter and fluized bed biofilter. Euroasian perch is reared in recirculating aquaculture systeme. Fish were devide into six groups in dependence on their body weight. Groups of fish with avarage start weight (g) {$\pm$} SD; biomass (kg) 232,9 {$\pm$} 10,0; 15,14 (I), 196,4 {$\pm$} 8,1; 15,32 (II), 139,8 {$\pm$} 6,1; 15,10 (III), 102,4 {$\pm$} 5,5; 15,06 (IV), 59,4 {$\pm$} 5,5; 15,04 (V), 37,7 {$\pm$} 7,5; 15,00 (VI) were put into plastic tank (600l). Three measurement was with fed fish and three measurement with food-deprived fish. Fed day was organised like feeding period (light phase) 12 hours and 12 hours non-feeding period (dark phase). First part of my project was about impact mechanicle filtration to remove solids from water. Mechanical filter can keep the water quality on perfect level for fish farming. Second part was about evaluation of nitrifying biologickle filters. Biologicle filtration was did her function well, because levels of amonia, nitrite and nitrate were keep on optimum values. Third part of my project was about measurement of oxygen consumption and amonia excretion. Was observed significant diurnal changes of oxygen consumption and amonia excretion for fed fish. For food-deprived fish was observed significant diurnal changes of oxygen consuption. Changes of amonia excretion were not significant.
Books on the topic "Biological oxygen consumption"
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Meeting, International Society on Oxygen Transport to Tissue. Oxygen transport to tissue XXIII: Oxygen measurements in the 21st century : basic techniques and clinical relevance. New York: Kluwer Academic/Plenum Pub., 2003.
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1956-, Dunn Jeffrey F., and Swartz Harold M, eds. Oxygen transport to tissue XXIV. New York: Kluwer Academic/Plenum Publishers, 2003.
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International Society on Oxygen Transport to Tissue. Meeting. Oxygen transport to tissue XXIV. New York: Kluwer Academic/Plenum Publishers, 2003.
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International Society on Oxygen Transport to Tissue. Meeting. Oxygen transport to tissue XII. New York: Plenum Press, 1990.
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Liss, Per. Oxygen transport to tissue XXX. Edited by International Society on Oxygen Transport to Tissue. New York: Springer, 2009.
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International Society on Oxygen Transport to Tissue, ed. Oxygen transport to tissue XXX. New York: Springer, 2009.
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International Society on Oxygen Transport to Tissue. Meeting. Oxygen transport to tissue XXV. New York: Kluwer Academic/Plenum Publishers, 2003.
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Meeting, International Society on Oxygen Transport to Tissue. Oxygen transport to tissue XXV. New York: Kluwer Academic/Plenum Publishers, 2003.
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Maureen, Thorniley, Harrison D. K. 1951-, and James Philip E, eds. Oxygen transport to tissue XXV. New York: Kluwer Academic/Plenum Publishers, 2003.
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International Society on Oxygen Transport to Tissue. Meeting. Oxygen transport to tissue X. New York: Plenum Press, 1988.
Find full textBook chapters on the topic "Biological oxygen consumption"
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Bergheim, A., O. I. Forsberg, and S. Sanni. "Biological basis for landbased farming of Atlantic salmon: Oxygen consumption." In Fish Farming Technology, 289–95. CRC Press, 2020. http://dx.doi.org/10.1201/9781003077770-48.
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Djordjević, Vladimir. "Superoxide Dismutase in Psychiatric Diseases." In Reactive Oxygen Species. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.99847.
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As with many other human diseases, oxidative stress is implicated in many neuropsychiatric disorders, including schizophrenia, bipolar disorder, depression and Alzheimer’s disease. Due to high oxygen consumption and a lipid-rich environment, the brain is highly susceptible to oxidative stress or redox imbalance. Both increased production of reactive oxygen species and antioxidant defense disorders have been demonstrated in psychiatric patients. Superoxide dismutase (SOD) is the primary, critical enzyme in the detoxification of superoxide radicals, because they are the main ROS, primarily generated in the most biological reactions of free radical formation. There are inconsistent data on this enzyme activity in patients with different psychoses. Since psychotic disorders are complex and heterogeneous disorders, it is not surprising that different authors have found that SOD activity is increased, decreased, or unchanged in the same type of psychosis. This review examines and discusses some recent findings linking SOD activity to schizophrenia, bipolar disorder, depression and Alzheimer’s disease.
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M. Waheeb, Omar, Mohanad Mahmood Salman, and Rand Qusay Kadhim. "Study of Change Surface Aerator to Submerged Nonporous Aerator in Biological Pond in an Industrial Wastewater Treatment in Daura Refinery." In Wastewater Treatment [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.104860.
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Daura refinery, with a capacity of 140,000 barrel per stream day as a refining capacity, wastewater discharged from refining and treatment processing units, polluted water as foul water, drainages, oil spills, blowdown of boilers and cooling towers, and many other polluted water sources, aims to remove pollutants and reject clean water to the river; wastewater treatment system takes place in this treatment process. Wastewater treatment system suffers from many problems and specifically biological stage; at this stage, activated sludge with bacteria, should be supplied with oxygen, aeration system done by surface aerators with four surface fans; these fans suffer from high vibration, loss support, and in consequence, lack in oxygen supply to aerobic bacteria less than 4 ppm. The nonporous aerator is suggested as an oxygen source for the biological pool. The pilot plant builds the aim to study the ability to apply the new aeration system at the biological pool, pilot plant build with 1 cubic meter capacity tank and continuous overflow of wastewater of 10 liters.min−1, air injected with the pressure of (0.5–0.75) bar(g), and airflow of (7.6–9.7) liter.min−1 respectively. Oxygen concentration was recorded as (3.4–6.0) ppm; in terms of consumption power, changing the aeration system reduces it to less than 20%.
Conference papers on the topic "Biological oxygen consumption"
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Deuel, Lloyd E., and George H. Holliday. "Oxygen Consumption as a Measure of Oil Impacted Soil Treatability." In ASME 2002 Engineering Technology Conference on Energy. ASMEDC, 2002. http://dx.doi.org/10.1115/etce2002/ee-29136.
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We know petroleum hydrocarbons degrade in soil via chemical, physical, and biological pathways. Innovative remediation technologies enhance degradation by one or more pathways e.g., in-situ and ex-situ. The typical goal of degradation is to achieve the applicable regulatory criteria. Some, State Agencies, e.g., Louisiana, Texas, require oil total petroleum hydrocarbon (TPH) contamination levels be reduced to ≤10,000 mg/kg. However, other agencies, e.g., New Mexico and California, require oil contamination levels reduced to <1,000 mg/kg. Even 100 mg/kg is not uncommon, e.g., Los Angeles, County, CA. Microbial populations and substrate availability often limit biodegradation at petroleum hydrocarbon levels <1,000 mg/kg. Conventional laboratory biodegradation microcosm studies require an inordinate amount of time to evaluate petroleum hydrocarbon treatability (as measured by loss of analyte) and even more time to optimize treatment parameters that facilitate or improve kinetics (lower half-life values). Two studies discussed here demonstrate the utility of oxygen consumption respirometry in evaluating oil impacted soil treatability. In the first study, oxygen consumption rates were measured after a 1-week incubation period at varying TPH levels (5800 and 1000 mg/kg), carbon:nitrogen (C:N) ratios (100:1 and 25:1), and manure content (0, 0.5, 1.0 and 5.0 percent). Results showed TPH and C:N ratios significant at < 1 percent level and manure significant at < 5 percent level. The second study, a longer-term study (132 day) showed oxygen consumption resulted from degradation of gasoline range (GRO) and diesel range (DRO) fractions of TPH. These studies provide a means of evaluating treatability of low concentrations of petroleum hydrocarbon and a method for assessing treatment options that are passive in nature, but less destructive to the environment.
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Liu, Jing. "Analogy Between Heat and Mass Transfer Leads to New Oxygen Transport Equations in Vascularized Biological Tissues." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-61102.
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Mathematical modeling of oxygen transport in living tissues has been an important approach for quantitatively understanding the physiological events. In a vascularized biological tissue, blood flow plays an important role in the local transport of oxygen, nutrients, pharmaceuticals, waste products and heat through the body. However, most of the existing oxygen transport models take few considerations of the anatomical structure. Therefore, disagreements among the theoretical predictions and the experimental measurements are common in those studies. This is because geometrical irregularity of the vascular structure remained to be a major obstacle for the accurate modeling. In fact, it has long been a desirable objective to establish a quantitative and generalized model, which is mathematically tractable in the region of interest and considering the detailed anatomical vascular geometry. In this paper, following the theoretical strategy through analogy between the heat and mass transport, the well-established Pennes equation, Chen-Holmes equation, and Weinbaum-Jiji (W-J) equation, etc. were implemented to develop the basic equations for characterizing the oxygen transport inside a vascularized tissue. These models have collectively included the contributions of the vascular geometry and the blood flow condition. As an illustration, predictions using the new model from W-J equation on several typical oxygen transfer problems were discussed. The theoretical results were applied to interpret some previous experimental observations. Further, uncertainties for the predicted oxygen concentrations of tissues due to approximate parameters and vascular structures were analyzed based on developing a generalized equation. Contributions from each of the thermal parameters such as diffusion coefficient, blood perfusion rate, and oxygen consumption rate of the tissues etc. can all be attributed to a single source term, which would make the model much convenient for practical use. The theoretical route proposed in this paper may provide a feasible way to comprehensively characterize the oxygen transport behaviors in living tissues with complex vasculature. It can also be extended to more wide mass transfer issues such as drug and nutrients delivery etc.
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Salek, M., and R. J. Martinuzzi. "Numerical Simulation of Fluid Flow and Oxygen Transport in the Tube Flow Cells Containing Biofilms." In ASME/JSME 2007 5th Joint Fluids Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/fedsm2007-37063.
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The hydrodynamics in flow systems is known to induce phenotypic changes associated with bacterial biofilms, including increased tolerance to antimicrobial agents and biocides. Results obtained in flow cells commonly used in biological and medical studies on the influence of flow on biofilm behavior and antimicrobial susceptibility are sometimes contradictory. It is thus hypothesized that discrepancies in the results may be related to the flow cell geometry. In this study, the shear stress distribution and substrate concentration were numerically simulated inside long rectangular and square tubes. The fluid was Newtonian and a uniform distribution of biofilms, which consume the substrate from the medium, was assumed on the walls. The consumption of oxygen by biofilms was assumed to follow the Monod kinetics. The effects of flow velocity, flow cell geometry, and substrate diffusivity on wall shear stress and substrate concentration distributions were investigated. Based on simulation results, differences observed in the morphology and response of biofilms can be directly related to hydrodynamic changes caused by the flow cell configuration.
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BEILICCI, Erika, and Robert BEILICCI. ""Advanced Hydroinformatic Tools for Modelling of Associated Processes with Water Quality. "." In Air and Water – Components of the Environment 2022 Conference Proceedings. Casa Cărţii de Ştiinţă, 2022. http://dx.doi.org/10.24193/awc2022_16.
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Water quality expresses the suitability of water to sustain various uses or processes: water for drink, food production, irrigation, animal husbandry, fishermen, recreation etc. Each use will have certain requirements for the physical, chemical or biological characteristics of water. The quality and composition of surface and underground waters is determined by natural factors (geological, topographical, meteorological, hydrological and biological characteristics of catchment) and by human activity (industrial wastes, sewage, runoff from farmland, cities, factory effluents, different hydrotechnical arrangements etc.). The evolution of water quality is also determined by the processes that take place in water bodies: chemical (neutralization, oxidation, reduction, flocculation, precipitation, adsorption, absorption, photochemical decomposition), physical (dilution, mixing, diffusion, sedimentation, coagulation, dissolution of oxygen, release of gases into the air, also influenced by solar radiation IR and UV, water temperature), biological (by its own biocenosis that competes with foreign elements, either directly, by lytic action (bacteriophages), filtration (shells), consumption (by protozoa) or the secretion of toxic substances for intruders (actinomycetes) and biochemicals (within the cycles of nitrogen, sulfur and carbon, based on the activity of specific microorganisms)). In this context, modeling the evolution of water quality is of particular importance for efficient water management. For the best possible forecast of water quality, the use of advanced hydroinformatic tools, such as the MIKEby DHI (Danish Hydraulic Institute) software package, is needed. The paper presents the possibility of using these tools and conducts a case study on a sector of the Bega River, downstream of Timisoara.
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Kerkez, Đurđa, Milena Bečelić-Tomin, Gordana Pucar Milidrag, Vesna Gvoić, Aleksandra Kulić Mandić, Anita Leovac Maćerak, and Dragana Tomašević Pilipović. "Treatment of wastewater containing printing dyes: summary and perspectives." In 10th International Symposium on Graphic Engineering and Design. University of Novi Sad, Faculty of technical sciences, Department of graphic engineering and design,, 2020. http://dx.doi.org/10.24867/grid-2020-p31.
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Synthetic dyes are widely used in textile, printing, leather tanning, cosmetic, drug and food processing industries. The printing and dyeing industry is considered as one of the most polluting industrial sectors. The printing process is very versatile and includes printing on paper as well as printing on textile, plastic and other materials. After the printing process is completed, various chemicals such as ethers, alcohols, phenols, aldehydes, ketones, benzene, and esters are used in the cleaning procedure. Resulting wastewater often contains a variety of solvents, surfactants, dyes, and other chemicals, thus greatly increasing the difficulty of wastewater treatment. Improper discharge of printing and dyeing wastewater into water bodies will have several effect, beginning with aesthetical issues followed by destruction of the aqueous ecosystem due to light attenuation, oxygen consumption and toxicity effects. Therefore, it is very important to find out and optimize printing and dying wastewater treatment techniques. Processes for dye removal from wastewater can be physical, chemical, biological and more recently hybrid treatments. Physical processes such as adsorption, based on mass transfer mechanism, are commonly used method mainly due to ease of operation and high efficiency. Chemical processes including coagulation and flocculation, advanced oxidation processes and electrochemical treatment are usually more expensive due t chemicals use, equipment requirements and electrical energy consumption. However, these techniques are destructive and may lead to total mineralization of dye molecules and accompanying pollutants. Biological treatment is a low-cost and environmentally friendly process that produces less sludge. This method has significant advantages but dye molecules are less prone to this kind of treatment as they are made to be stable and reluctant. So, the adjustment and optimization of biological treatment, for dye removal, is an ongoing field of research. In recent studies hybrid processes are gaining more attention, combining different techniques. Integrating treatments, as a cost-saving and time-saving process, can represent optimal solution for printing wastewater treatment.
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Ley, Obdulia, and Yildiz Bayazitoglu. "Effect of Physiological Parameters on the Temperature Distribution of a Layered Head Model." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-32044.
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Brain temperature control is important in clinical therapy, because moderate temperature reduction of brain temperature increases the survival rate after head trauma. A factor that affects the brain temperature distribution is the cerebral blood flow, which is controlled by autoregulatory mechanisms. To improve the existing thermal models of brain, we incorporate the effect of the temperature over the metabolic heat generation, and the regulatory processes that control the cerebral blood perfusion and depend on physiological parameters like, the mean arterial blood pressure, the partial pressure of oxygen, the partial pressure of carbon dioxide, and the cerebral metabolic rate of oxygen consumption. The introduction of these parameters in a thermal model gives information about how specific conditions, such as brain edema, hypoxia, hypercapnia, or hypotension, affect the temperature distribution within the brain. Existing biological thermal models of the human brain, assume constant blood perfusion, and neglect metabolic heat generation or consider it constant, which is a valid assumption for healthy tissue. But during sickness, trauma or under the effect of drugs like anesthetics, the metabolic activity and organ blood flow vary considerably, and such variations must be accounted for in order to achieve accurate thermal modeling. Our work, on a layered head model, shows that variations of the physiological parameters have profound effect on the temperature gradients within the head.