منابع مشابه
Acid tests
By taking up a large proportion of the carbon dioxide that human activities have released since the Industrial Revolution, oceans have helped to mitigate the effects of climate change. Only in recent years have scientists come to realise that this benefit comes at a high price. The pH of ocean water is decreasing, and, according to recent research, it appears to have dropped by 0.35 pH units in...
متن کاملAcid tests
by some of the poorest nations that rely on fishing as a food staple, a study has found. Scientists have estimated that, for more than 50 years, the UN Food and Agriculture Organisation has failed to report the huge numbers of fish being caught by small-scale fisheries in its statistics on national catches. They believe the discrepancy is exacerbating the decline of fish stocks by allowing some...
متن کاملPredictive value of perioperative gastric acid tests.
Preoperative acid studies and early postoperative insulin tests in 275 patients undergoing various forms of vagotomy have been related to recurrent ulceration. Follow-up time has been from two to nine years, mean 4-3 years. Recurrence is directly related to basal acidity in both tests but is not related to stimulated acid levels preoperatively. In the insulin tests higher levels of acidity afte...
متن کاملthe washback effect of discretepoint vs. integrative tests on the retention of content in knowledge tests
در این پایان نامه تاثیر دو نوع تست جزیی نگر و کلی نگر بر به یادسپاری محتوا ارزیابی شده که نتایج نشان دهندهکارایی تستهای کلی نگر بیشتر از سایر آزمونها است
15 صفحه اولTowards improved accuracy of Bordetella pertussis nucleic acid amplification tests.
In many clinical microbiology laboratories, nucleic acid amplification tests such as PCR have become the routine methods for the diagnosis of pertussis. While PCR has greatly increased the ability of laboratories to detect Bordetella pertussis infections, it has also been associated with false-positive results that can, given the tendency of B. pertussis to cause outbreaks, result in unnecessar...
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ژورنال
عنوان ژورنال: Current Biology
سال: 2008
ISSN: 0960-9822
DOI: 10.1016/j.cub.2008.11.043