Results 351 to 360 of about 4,650,121 (384)

Biochemical adaptation to environmental hypoxia

2018
Chapter 8 explores mechanisms of hemoglobin adaptation to environmental hypoxia. Vertebrates living in hypoxic environments face the physiological challenge of optimizing the trade-off between oxygen loading at the respiratory surfaces and oxygen unloading in the tissue capillaries.
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Combined exposure to hypoxia and ammonia aggravated biological effects on glucose metabolism, oxidative stress, inflammation and apoptosis in largemouth bass (Micropterus salmoides).

Aquatic Toxicology, 2020
Hypoxia and ammonia are unavoidable environmental factors in aquaculture, and have been shown cause various adverse effects in fish. In the present study, a two-factor crossover experiment was carried out to evaluate the combined effect of hypoxia and ...
Liu-lan Zhao, C. Cui, Qiao Liu, Jun-long Sun, K. He, A. Adam, Jie Luo, Zhiqiong Li, Yan Wang, Song Yang   +9 more
semanticscholar   +1 more source

Environmental hypoxia affects osmotic and ionic regulation in freshwater midge-larvae

Journal of Insect Physiology, 1998
The effect of anaerobic metabolism on the osmotic and ionic regulation of the extracellular fluid was examined. Larvae of three species, characterized by different hypoxia tolerance, were studied: Chaoborus crystallinus, Culex pipiens and Chironomus gr. plumosus.
Frank, Scholz, I, Zerbst-Boroffka
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Superoxide radical production in response to environmental hypoxia in cultured shrimp

Comparative Biochemistry and Physiology Part C: Toxicology & Pharmacology, 2006
Markers of oxidative stress in response to hypoxia and reoxygenation were assessed in Pacific white shrimp (Litopenaeus vannamei). Adult shrimp were either exposed to hypoxia (1 mg O(2)/L) for 6, 12, or 24 h followed by 1-h reoxygenation, or exposed to hypoxia for 24 h followed by 1- to 6-h reoxygenation.
Tania, Zenteno-Savín, Ricardo, Saldierna, Mauricio, Ahuejote-Sandoval   +2 more
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Parameters controlling opine formation during muscular activity and environmental hypoxia

Journal of Comparative Physiology B, 1989
In order to elucidate the regulatory parameters which determine multiple opine formation in marine invertebrates, anaerobiosis was induced in 25 species from several phyla by stimulating the animals to vigorous muscular activity or by subjecting them to environmental hypoxia.
Ulrike Kreutzer, Berthold R. Siegmund, Manfred K. Grieshaber   +2 more
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Nitrogen sources and Gulf hypoxia: potential for environmental credit trading

Ecological Economics, 2005
A zone of hypoxic and anoxic waters has become a dominant feature of the northern Gulf of Mexico. Nitrogen draining into the Gulf from the Mississippi Basin has been identified as the primary source of the problem. Reducing nitrogen loads from point and nonpoint sources in the basin is the primary goal of an action plan developed to address the problem.
Marc O. Ribaudo, Ralph Heimlich, Mark Peters   +2 more
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Physiological Responses of Some Benthic Macroinvertebrates to Environmental Hypoxia

Journal of Environment and Human, 2014
Global warming has a direct impact on the water body by increasing its surface water temperature. The increase in the kinetic energy of the water results in decrease in solubility of oxygen in the water and results to low dissolved oxygen. The waters of Lagos lagoon was studied between January, 2007 and December, 2008 to assess the impact of increased ...
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Erythropoietin concentrations during 10 days of normobaric hypoxia under controlled environmental circumstances

Acta Physiologica Scandinavica, 2002
Serum erythropoietin levels (s‐[epo]), haemoglobin concentration ([Hb]), haematocrit (hct), and ferritin concentration ([fer]) were measured in seven healthy male volunteers (20–23 years) exposed continuously to hypoxia (PO2 14 kPa) for 10 days. Serum erythropoietin concentration increased significantly from 9.5 ± 3.51 to 33.6 ± 11.64 U L–1 (P < 0 ...
B, Berglund, M, Gennser, H, Ornhagen, C, Ostberg, L, Wide   +4 more
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Cerebrovascular function under extreme environmental hypoxia

Hypoxic environments elicit multiple physiological responses in order to maintain sufficient oxygen delivery, and ultimately, maintain function. The brain is particularly susceptible to hypoxic environments as it has essentially no metabolic storage capacity; therefore, it relies on a constant, well titrated supply of oxygen to match metabolic demand ...
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Cellular adaptation to hypoxia through hypoxia inducible factors and beyond

Nature Reviews Molecular Cell Biology, 2020
Pearl Lee, Navdeep S Chandel, M Celeste Simon   +2 more
exaly