Results 251 to 260 of about 34,425 (305)

Exploring Interactive Effects of Arsenic and Selenium Exposure on Larval Zebrafish (Danio rerio)

Environmental Toxicology, EarlyView.
ABSTRACT Arsenic contamination in aquatic ecosystems is a major environmental concern. Selenium (Se) helps mitigate oxidative stress and hence could reduce the toxic effects of arsenic. However, Se can also be toxic at high concentrations. Given that these metalloids commonly co‐occur in the environment, there is a pressing need for further research ...
Owen Luo, Jinnath Rehana Ritu, Md Helal Uddin, Sravan Kumar Putnala, Mahesh Rachamalla, Som Niyogi, Douglas P. Chivers   +6 more
wiley   +1 more source

Oxidative Stress Biomarkers in the Shrimp Macrobrachium amazonicum (Heller, 1862): Assessment in an Environmental Preservation Area in the Brazilian Amazon

Environmental Toxicology, EarlyView.
ABSTRACT Anthropogenic activities generate a significant amount of pollutants that are released into the environment, causing physiological and ecological disturbances. Among the xenobiotics present in aquatic ecosystems, numerous chemical and organic compounds have oxidative potential or are metabolized through oxidative processes, which may amplify ...
Natália Eduarda da Silva, Arllon José dos Santos Dias, Layane Vitoria dos Santos e Santos, Natalie de Matos Araujo, Darlan Coutinho dos Santos, Jefferson Romáryo Duarte da Luz, Gabriel Araujo‐Silva   +6 more
wiley   +1 more source

Environmental Contaminant Accumulation in Freshwater Turtles Inhabiting Three Rivers of the Permian Basin, New Mexico, USA

Environmental Toxicology, EarlyView.
ABSTRACT Freshwater turtles are valuable sentinels of aquatic systems due to their long lifespans and resilience in environments impacted by contaminants. The Permian Basin, dominated by the oil and gas sector, spans western Texas and southeastern New Mexico, USA, including the Pecos River and its tributaries, the Delaware and Black Rivers.
Ana G. G. Sapp, W. Gregory Cope, Christopher E. Moorman, Frank X. Weber, Ivana Mali   +4 more
wiley   +1 more source

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Selenium Reagents for Organic Synthesis

Current Organic Synthesis, 2022

Fateh V, Singh, Thomas, Wirth
openaire   +2 more sources

Selenium in Organic Synthesis

Science, 1986
The introduction, manipulation, and ultimate removal of selenium-containing functional groups allow a variety of synthetically useful processes to be accomplished in high overall yields under mild conditions. In particular, transformations such as allylic oxidations, nucleophile-induced cleavage reactions, regiospecific alkylations, and olefin ...
Dennis, Liotta, Robert, Monahan
openaire   +2 more sources

Speciation of selenium in the mammalian organism

The Analyst, 1998
As almost all of the selenium present in the mammalian organism is protein-bound, speciation is mostly concerned with the determination of the different selenium-containing proteins. Information on their distribution and their concentrations in the different tissues of the rat was obtained by means of tracer procedures which, after application of 75Se ...
D, Behne, C, Hammel, H, Pfeifer, D, Röthlein, H, Gessner, A, Kyriakopoulos   +5 more
openaire   +2 more sources

The organ distribution of selenium in German adults

Biological Trace Element Research, 1988
The selenium concentrations were determined in liver, kidney, skeletal muscle, heart, brain, prostate, testis, bile, lung, and spleen of German traffic accident victims. In addition, the nitrogen and phosphorus contents were determined in the same organs and tissues.
O, Oster, G, Schmiedel, W, Prellwitz
openaire   +2 more sources

Selenium Metabolism in Micro-organisms

1993
Publisher Summary Selenium is one of the youngest elements detected to have a biological function. The form used in biological macromolecules (proteins, tRNAs), however, is the -2 oxidation state. Nature has used the chemical property of the selenol group to incorporate it into the active site of oxidoreductases.
J, Heider, A, Böck
openaire   +2 more sources

Pharmacology of synthetic organic selenium compounds

1991
The similarity in the chemical properties of sulfur and selenium has tempted medical chemists for many years to prepare, for comparative purposes, a wide variety of selenium derivatives of sulphur- or oxygen-containing compounds. Because of the widespread use of this chemical comparison, the list of published and/or patented structures of organic ...
M J, Parnham, E, Graf
openaire   +2 more sources