Vitamin A equivalency estimates: understanding apparent differences
نویسندگان
چکیده
منابع مشابه
A review of vitamin A equivalency of β-carotene in various food matrices for human consumption.
Vitamin A equivalency of β-carotene (VEB) is defined as the amount of ingested β-carotene in μg that is absorbed and converted into 1 μg retinol (vitamin A) in the human body. The objective of the present review was to discuss the different estimates for VEB in various types of dietary food matrices. Different methods are discussed such as mass balance, dose-response and isotopic labelling. The...
متن کاملHow Much Should We Trust Differences-in-differences Estimates? Differencesin-differences Estimates? How Much Should We Trust Differences-in-differences Estimates?
Most Difference-in-Difference (DD) papers rely on many years of data and focus on serially correlated outcomes. Yet almost all these papers ignore the bias in the estimated standard errors that serial correlation introduces. This is especially troubling because the independent variable of interest in DD estimation (e.g. the passage of law) is itself very serially correlated, which will exacerba...
متن کاملUnderstanding vitamin D deficiency
Age and Ageing 2014; doi: 10.1093/ageing/afu099. 3. Irani SR, Vincent A, Schott J. Autoimmune encephalitis. BMJ 2011; 342: d1918. 4. Srinivasan AV, Murugappan M, Krishnamurthy SG, Sayeed ZA. Neuroleptic malignant syndrome. J Neurol Neurosurg Psychiat 1990; 53: 514–6. 5. Weiner AL, Vieira L, McKay CA, Bayer MJ. Ketamine abusers presenting to the emergency department: a case series. J Emerg Med 2...
متن کاملGender differences in apparent motion perception.
Distance disparity is a strong cue to element correspondence in apparent motion. Using a 2-AFC paradigm we have previously shown that shape similarity also plays a role. We now demonstrate a small gender difference in these effects: women are more sensitive to distance disparity, whereas men are more sensitive to differences in shape. Furthermore, in the competing presence of a shape cue, women...
متن کاملEstimates of Norm and Essential norm of Differences of Differentiation Composition Operators on Weighted Bloch Spaces
Norm and essential norm of differences of differentiation composition operators between Bloch spaces have been estimated in this paper. As a result, we find characterizations for boundedness and compactness of these operators.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The American Journal of Clinical Nutrition
سال: 2005
ISSN: 0002-9165,1938-3207
DOI: 10.1093/ajcn/81.4.943