منابع مشابه
Taking St John's wort during pregnancy.
QUESTION A 23-year-old patient of mine has been taking St John's wort for postpartum depression for about 2 years. She is now planning her second pregnancy. Is she or her fetus at risk if she continues to take the herbal therapy? ANSWER Despite the widespread availability and use of St John's wort and extensive research on the herb, there are almost no data on reproductive safety. At this sta...
متن کاملNitrate Storage and Dissimilatory Nitrate Reduction by Eukaryotic Microbes
The microbial nitrogen cycle is one of the most complex and environmentally important element cycles on Earth and has long been thought to be mediated exclusively by prokaryotic microbes. Rather recently, it was discovered that certain eukaryotic microbes are able to store nitrate intracellularly and use it for dissimilatory nitrate reduction in the absence of oxygen. The paradigm shift that th...
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Denitrification and dissimilatory nitrate reduction to ammonium (DNRA) are processes occurring simultaneously under oxygen-limited or anaerobic conditions, where both compete for nitrate and organic carbon. Despite their ecological importance, there has been little investigation of how denitrification and DNRA potentials and related functional genes vary vertically with sediment depth. Nitrate ...
متن کاملReduction of Nitrate during release of Stored Energy from Gamma Irradiated Crystalline Potassium Fluoride in Aqueous Nitrate Solution
Reduction of nitrate takes place when the stored energy in the form of colour centres is released during dissolution of g-irradiated crystalline potassium fluoride in aqueous potassium nitrate solution. Various parameters like dose, amount and storage time of irradiated potassium fluoride which control the yield of nitrite have been studied. Similarly, the effect of concentration of potassium n...
متن کاملNitrate Reduction and Assimilation in Chlorella
1. Nitrate reduction and assimilation have been studied in Chlorella pyrenoidosa under growth conditions by observing effects on the CO(2)/O(2) gas exchange quotient. 2. During assimilation of glucose in the dark, nitrate reduction is noted as an increase in the R.Q. to about 1.6 caused by an increased rate of carbon dioxide production. 3. During photosynthesis at low light intensity nitrate re...
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ژورنال
عنوان ژورنال: Kvasny Prumysl
سال: 1992
ISSN: 0023-5830
DOI: 10.18832/kp1992020