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A calorimetry system for metabolism trials Arq. Bras. Med. Vet. Zootec.
Rodríguez,N.M.; Campos,W.E.; Lachica,M.L.; Borges,I.; Gonçalves,L.C.; Borges,A.L.C.C.; Saliba,E.O.S..
An indirect calorimetry system for rapid determination of CO2 and CH4 production and O2 consumption to estimate heat production of animals was built at Escola de Veterinária da Universidade Federal de Minas Gerais, Brazil. Procedures for determination of correction and calibration factors for gas analyzers and the whole system, using standard test gases were described. In addition, a metabolic trial was performed to evaluate heat production of lambs fed ad libitum. It is concluded that the system is suitable for heat production determinations in small and medium size animals.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Calibration; Open circuit; Respirometry.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352007000200033
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An early-life hypoxia event has a long-term impact on protein digestion and growth in European sea bass juvenile. ArchiMer
Zambonino, Jose-luis; Mazurais, David; Dubuc, Alexia; Queau, Pierre; Vanderplancke, Gwenaelle; Servili, Arianna; Cahu, Chantal; Le Bayon, Nicolas; Huelvan, Christine; Claireaux, Guy.
Ocean warming, eutrophication and consequent decrease in oxygen lead to smaller average fish size. Although such responses are well-known in an evolutionary context, involving multiple generations, it appears to be incompatible with current rapid environmental change. Rather, phenotypic plasticity could provide a means for marine fish to cope with rapid environmental changes. However, little is known about the mechanisms underlying plastic responses to environmental conditions that favour small phenotypes. Our aim was to investigate how and why European sea bass that had experienced a short episode of moderate hypoxia during their larval stage subsequently exhibited a growth depression at the juvenile stage compared to the control group. We examined...
Tipo: Text Palavras-chave: Climate change; Digestive enzymes; Dicentrarchus labrax; Growth; Hypoxia; Respirometry.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00373/48407/48635.pdf
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Assessment of microalgae and nitrifiers activity in a consortium in a continuous operation and the effect of oxygen depletion Electron. J. Biotechnol.
Vargas,Gustavo; Donoso-Bravo,Andrés; Vergara,Christian; Ruiz-Filippi,Gonzalo.
Background: Industrial wastewaters with a high content of nitrogen are a relevant environmental problem. Currently, treatments to remove nitrogen are not efficient, so is necessary to develop alternative methods. The objective of this study is to investigate a consortium of microalgae - nitrifying, that due to the symbiosis between them could be an interesting alternative. Results: In this study, it was possible to obtain a consortium of nitrifying bacteria (NB) and microalgae (MA) capable of operating with low requirements of dissolved oxygen, using aerobic sludge from wastewater treatment plants. During the operation, this consortium presents removal percentages above 98% of ammonia, even at concentrations of DO of 0.5 mg O2 L-1. It is estimated that the...
Tipo: Journal article Palavras-chave: Ammonium; Consortium nitrifying-microalgae; Oxygen; Respirometry.
Ano: 2016 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582016000500007
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Balance de carbono y tasa de descomposición de mantillo y horizontes de fermentación de suelos forestales. Colegio de Postgraduados
Barrales Brito, Edgar.
El mantillo y horizontes de fermentación (CF) es un reservorio dinámico de carbono (C) en suelos forestales. Las metodologías que cuantifican la emisión de CO2 por la descomposición son escasas y requieren periodos largos de medición. Se requieren métodos para poder generar información de la emisión de CO2 de éstas capas orgánicas en tiempos cortos de medición. Los objetivos fueron: generar un protocolo para la medición de la emisión de CO2 por la descomposición de mantillo y CF con un respirómetro manométrico (OxiTop ®). Medir los reservorios de C de mantillo y CF de bosques con diferentes condiciones. Medir la emisión de CO2 del mantillo y CF y las tasas de descomposición con un respirómetro. Analizar las características químicas de los mantillos y...
Palavras-chave: Biogeoquímica; Emisión de CO2; Respirometría; Materia orgánica; Bosques; Biogeochemistry; CO2 emissions; Respirometry; Organic matter; Forest; Edafología; Maestría.
Ano: 2013 URL: http://hdl.handle.net/10521/2096
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Energy partitioning and methane emission by sheep fed sorghum silages at different maturation stages. Repositório Alice
MACHADO, F. S.; RODRÍGUEZ, N. M.; GONÇALVES, L. C.; RODRIGUES, J. A. S.; RIBAS, M. N.; PÔSSAS, F. P.; JAYME, D. G.; PEREIRA, L. G. R.; CHAVES, A. V.; TOMICH, T. R..
2015
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Greenhouses gas; Nutritional value; Net energy; Respirometry.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1035382
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Energy partitioning and methane emission by sheep fed sorghum silages at different maturation stages Arq. Bras. Med. Vet. Zootec.
Machado,F.S.; Rodríguez,N.M.; Gonçalves,L.C.; Rodrigues,J.A.S.; Ribas,M.N.; Pôssas,F.P.; Jayme,D.G.; Pereira,L.G.R.; Chaves,A.V.; Tomich,T.R..
Energy partitioning and methane production by sheep fed silages of three commercially available sorghum hybrids (BRS 610, BR 700 and BRS 655) harvested at three maturation stages (milk, soft dough and floury) were evaluated in open circuit respiration chambers. A complete randomized design was used in a 3 × 3 (hybrids × maturity stages) factorial arrangement, and the means were compared by the Student-Newman-Keuls (SNK) test (P<0.05). The intake of dry matter, digestible dry matter, gross energy, digestible energy and metabolizable energy were not affected by maturation stage, but were influenced by hybrid. The net energy intake was influenced by maturity and sorghum genetics. The fecal output represented the main source of energy loss, as percentage of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Greenhouses gas; Nutritional value; Net energy; Respirometry.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352015000300790
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Evaluation of the biodegradation of different types of lubricant oils in liquid medium BABT
Lopes,Paulo Renato Matos; Bidoia,Ederio Dino.
The aim of this work was to study the biodegradation of different types of automotive lubricant oils adapted to the aqueous medium using a base inoculum and an aqueous inoculum. Four treatments were carried out in two consecutive and similar experiments: T1 (control); T2 (half-synthetic oil); T3 (mineral oil); T4 (used oil). The results showed the following decreasing order of CO2 production in the Bartha and Pramer respirometers: T4 > T2 > T3 > T1. Thus, the used lubricant oil showed with highest biodegradability, followed by the half-synthetic one and the mineral oil. It was also observed that the mineral lubricant presented a longer period of adaptation compared to the half-synthetic one.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biodegradation; Lubricant oil; Respirometry; Liquid medium.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000500028
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Métodos para determinação da umidade em incubações biológicas. Repositório Alice
DALLE VEDOVE, G.; DE NARDI, G. P.; GRUTZMACHER, P.; LIGO, M. A. V.; PIRES, A. M. M..
Para garantir condições ideais para a atividade microbiana em experimentos de incubação, recomenda-se a utilização de 70% da capacidade de retenção de água do solo (CRA). Os métodos que determinam a CRA em amostras de solo indeformadas são padronizados. No entanto, para amostras deformadas de solo, são utilizados métodos empíricos para definir a CRA. O objetivo deste estudo foi avaliar se os valores referentes a 70% da CRA, obtidos por meio de métodos empíricos, representam a umidade necessária para que se tenha a máxima atividade microbiana nas incubações biológicas. Dois experimentos de incubação respirométrica foram realizados para avaliar a influência da umidade na respiração basal do solo (SBR) e na respiração induzida por substrato (SIR; 1,2 g...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: CRA; Respirometria; Mineralização do carbono; WHC; Respirometry; Carbon mineralization; Carbono; Mineralização; Retenção de água no solo; Umidade do solo.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1084205
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Potassium chloride: impacts on soil microbial activity and nitrogen mineralization Ciência Rural
Pereira,David Gabriel Campos; Santana,Isadora Alves; Megda,Marcio Mahmoud; Megda,Michele Xavier Vieira.
ABSTRACT: Potassium chloride is the most widely used potassium source worldwide, and due to its continuous use, the accumulation of its salts in the soil and in plants is becoming more common. Excess available ions can cause a series of physiological disturbances in organisms and can become a biocide in the soil. The objective of this study was to evaluate the effects of the application of KCl and banana crop residues on soil chloride content, microbial activity, and soil ammonification. The experiment utilized a completely randomized 2 × 4 factorial design with four replicates. Treatments were as follows: two doses of vegetal residue (200 and 400 mg dm-3) × four doses of KCl (0, 167, 334, and 668 mg dm-3 of KCl) and a control (untreated soil). The CO2...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Respirometry; Salinity; Bananeira residues; Ammonification..
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000500250
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Respirometry kinetics of phenol oxidation by Comamonas testosteroni Pb50 under various conditions of nutritional stress BABT
Paca,Jan; Kosteckova,Alena; Pacova,Leona; Prell,Ales; Halecky,Martin; Paca Jr.,Jan; Stiborova,Marie; Kozliak,Evguenii; Soccol,Carlos Ricardo.
Kinetics of phenol biodegradation using suspended biomass of Comamonas testosteroni Pb50 (monoculture) was measured under conditions of nutrient abundance, limitation, and prolonged cell starvation in a fed-batch reactor, with phenol being the sole carbon and energy source. The pre-washed cells were applied for measurement of the phenol and oxygen uptake rates at varied starting phenol concentrations with the kinetic parameters calculated using the Haldane model. The results revealed that nutrient limitation significantly suppressed the maximum value of exogenous respiration rate while the endogenous respiration rate, affinity and tolerance to phenol increased. By contrast, cell starvation resulted in a drop of both the exogenous and endogenous respiration...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Respirometry; Kinetics; Phenol; Nutrition stress.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000600030
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Simulation of a surface spill of different diesel/biodiesel mixtures in an ultisol, using natural attenuation and bioaugmentation/biostimulation Anais da ABC (AABC)
MEYER,DANIEL D.; BEKER,SABRINA A.; HECK,KARINA; PERALBA,MARIA DO CARMO R.; BENTO,FÁTIMA M..
Abstract Accidents caused by leaks and/or spills on soils need to be addressed. Natural attenuation, biostimulation and bioaugmentation can be useful bioremediation strategies for decontamination processes in soils of diesel/biodiesel mixtures. The purpose of this study was to evaluate the degradation rate of the different fuels (B0, B20 and B100) in an ultisol under natural attenuation and biostimulation/bioaugmentation during 60 days of incubation in a controlled microcosm simulating a surface spill over soil. The degradation of different diesel/biodiesel mixtures was monitored for up to 60 days by dehydrogenase activity, respirometry by CO2 release, the most probable number of heterotrophic and degrading microorganism and gas chromatography. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bacterial consortium; Bioremediation strategies; Dehydrogenase; Respirometry; Soil spill.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000602741
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Water temperature, body mass and fasting heat production of pacu (Piaractus mesopotamicus) Anais da ABC (AABC)
AGUILAR,FREDY A.A.; CRUZ,THALINE M.P. DA; MOURÃO,GERSON B.; CYRINO,JOSÉ EURICO P..
ABSTRACT Knowledge on fasting heat production (HEf) of fish is key to develop bioenergetics models thus improving feeding management of farmed species. The core of knowledge on HEf of farmed, neotropical fish is scarce. This study assessed the effect of body mass and water temperature on standard metabolism and fasting heat production of pacu, Piaractus mesopotamicus, an omnivore, Neotropical fresh water characin important for farming and fisheries industries all through South American continent. An automated, intermittent flow respirometry system was used to measure standard metabolic rate (SMR) of pacu (17 - 1,050 g) at five water temperatures: 19, 23, 26, 29 and 33 °C. Mass specific SMR increased with increasing water temperature but decreased as...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allometric exponent; Bioenergetics models; Pacu; Respirometry; Standard metabolic rate.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000301305
Registros recuperados: 12
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