BHNRCBeltsville Human Nutrition Research Center
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These databases, along with other databases managed by other BHNRC laboratories, generate a need for a "one-stop shopping" approach to meet emerging demands of diverse users.
"This database contains functional information on more than 5,800 genes commonly studied in humans, pigs, and mice, including about 2,240 that have been sequenced at BHNRC." The database can be found at
Recently, BHNRC physiologists David Baer and Janet Novotny expanded on the Atwater methods and arrived at a lower estimate than previously reported for the available calories from the two tree nuts they studied.
Chen and BHNRC colleagues Jianghao Sun and Long-Ze Lin analyzed "extractions" of 20 commercially available green tea dietary supplement products (12 tablets or capsules and 8 liquid samples) and 8 dry green tea leaf samples, and they compared the chemical constituents of the samples using an analytical technique called "HPLC/MS."
Other BHNRC studies are showing that HRMS fingerprinting, when combined with chemical and statistical pattern methods called ANOVA-Principal Component Analysis, can clearly establish chemical differences between food samples in terms of growing year and harvest time (early, mid, and late season).
"We work with other BHNRC, private, and public-sector scientists to acquire, evaluate, and disseminate accurate nutrient-profile data on foods--and now certain dietary supplements--consumed in the United States." (See "National Food and Nutrient Analysis Program," page 14.)
This information is collected via a computerized dietary-survey program developed and validated by BHNRC researchers.
Among several diabetes-focused studies conducted and published in the last 5 years by BHNRC researchers, one involved looking at a potential interplay between the extract and insulin or blood glucose levels.
First, the BHNRC team worked with other expert analysts to identify methods for analyzing vitamin D in a variety of food types.
BHNRC researchers also maintain large databases of the nutrient values of foods that are key to accurately estimating the amount of nutrients in foods that survey respondents report eating.
One of those early studies was authored by BHNRC's Joseph Judd, now retired, and nutritionist Beverly A.
The BHNRC researchers used those data products to produce custom data sets that now appear as a variety of tables and appendices in the current edition of the Dietary Guidelines--an 80-page booklet.