Search Results - "Clifford, A.J"

Compartmental analysis of the dynamics of beta-carotene metabolism in an adult volunteer by Novotny, J.A, Dueker, S.R, Zech, L.A, Clifford, A.J

“…Metabolism of a 73 micromole oral dose of beta-carotene-d8 in olive oil was determined from plasma beta-carotene-d8 and retinol-d4, concentration-time curves…”
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Tissue distribution and prediction of total body folate of rats by Clifford, A J, Heid, M K, Müller, H G, Bills, N D

“…To clarify relationships between dietary folic acid intake, blood levels and body stores of folate, rats were fed an amino acid-based diet supplemented with 0,…”
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Repletion of folate-depleted rats with an amino acid-based diet supplemented with folic acid by Clifford, A J, Wilson, D S, Bills, N D

“…Folate depletion and repletion protocols are not well standardized. Weanling rats were moderately depleted of folate in 28 d with a folate-free purified diet…”
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Bioavailability of food folates and evaluation of food matrix effects with a rat bioassay by Clifford, A J, Heid, M K, Peerson, J M, Bills, N D

“…Folate bioavailability of beef liver, lima beans, peas, spinach, mushrooms, collards, orange juice and wheat germ was estimated with a protocol of folate…”
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Bioavailability of folates in selected foods incorporated into amino acid-based diets fed to rats by Clifford, A J, Jones, A D, Bills, N D

“…Two experiments were conducted to determine the feasibility of using a folate depletion/repletion protocol with rats fed an amino acid-based diet to measure…”
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Adenine, the precursor of nucleic acids in intestinal cells unable to synthesize purines de novo by Savaiano, D A, Clifford, A J

“…The capacity of rat intestinal epithelial cells for de novo purine synthesis and reutilization was studied in vitro with isolated cells and in vivo in…”
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Comparison of Two Dietary Folate Intake Instruments and Their Validation by RBC Folate by Owens, Janel E, Holstege, Dirk M, Clifford, Andrew J

“…An optimal folate nutritional status is important in minimizing developmental and degenerative disease. Therefore, constant monitoring of folate intake and of…”
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Biological activity of racemic folate mixtures fed to folate-depleted rats by Bills, N D, Jones, A D, Clifford, A J

“…Most commercially available tretrahydro and substituted folates are racemic mixtures of R and S isomers about pteridine-carbon 6. Some reports show the…”
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Erythrocyte folate and its response to folic acid supplementation is assay dependent in women by Clifford, Andrew J, Noceti, Elizabeth M, Block-Joy, Amy, Block, Torin, Block, Gladys

“…Optimizing folate status requires continued monitoring of erythrocyte (RBC) folate and folate intake. The accuracy of RBC folate assays remains a concern…”
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High-Throughput Method for the Quantitation of Total Folate in Whole Blood Using LC-MS/MS by Owens, Janel E, Holstege, Dirk M, Clifford, Andrew J

“…A high-throughput liquid chromatography tandem mass spectrometry (HT LC-MS/MS) method for red blood cell (RBC) folate analysis was developed from a previously…”
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Variability in conversion of β-carotene to vitamin A in men as measured by using a double-tracer study design by Hickenbottom, S.J, Follett, J.R, Lin, Y, Dueker, S.R, Burri, B.J, Neidlinger, T.R, Clifford, A.J

“…Background: The vitamin A activity of β-carotene is variable and surprisingly low in women. The reasons for this are not well understood. The vitamin A…”
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Protein intake, uric acid metabolism and protein efficiency ratio in growing chicks by Hevia, P, Clifford, A J

“…Changes in uric acid metabolism in chicks resulting from alterations in dietary protein intake have been correlated with dietary protein quality. Plasma uric…”
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Quantitation of Total Folate in Whole Blood Using LC-MS/MS by Owens, Janel E, Holstege, Dirk M, Clifford, Andrew J

“…An accurate method for measuring whole blood total folate using liquid chromatography with tandem mass spectrometry is described and compared to GC/MS and a…”
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A rat bioassay for measuring the comparative availability of carbohydrates and its application to legume foods, pure carbohydrates and polyols by Karimzadegan, E, Clifford, A J, Hill, F W

“…An assay was developed to evaluate the bioavailability of dietary carbohydrate by slope-ratio analysis of weight gain and plasma ketones of rats fed a…”
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Folate in beer by Owens, J.E, Clifford, A.J, Bamforth, C.W

“…Folate levels in a range of beers and other beverages have been measured using high‐performance liquid chromatography with fluorescence detection (HPLC‐FLD)…”
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Absorption and metabolism of orally administered purines in fed and fasted rats by Ho, C Y, Miller, K V, Savaiano, D A, Crane, R T, Ericson, K A, Clifford, A J

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Failure of dietary leucine to influence the tryptophan-niacin pathway in the chicken by Penz, Jr, A M, Clifford, A J, Rogers, Q R, Kratzer, F H

“…Three experiments were conducted with young chicks to determine whether dietary leucine affects the conversion of tryptophan to niacin. Either tryptophan or…”
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Kinetics of 14C distribution after tracer dose of 14C-lutein in an adult woman by De Moura, F.F, Ho, C.C, Hickenbottom, S, Clifford, A.J

“…Lutein is an oxygenated carotenoid (xanthophyll) found in dark green leafy vegetables. High intakes of lutein may lower the risk of age‐related macular…”
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Traditional and accelerator mass spectrometry for quantitation of human folate pools by Dueker, Stephen R., Lamé, Michael, Lin, Yumei, Clifford, Andrew J., Buchholz, Bruce A., Vogel, John S.

“…Folate is a structurally diverse family of molecules that occur in low concentrations in biological tissues and fluids and therefore present complex challenges…”
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Growth and metabolism of rats fed nonprotein nitrogen diets supplemented with nicotinamide, succinate and pyridoxine by Prior, R L, Clifford, A J, Visek, W J

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