Zinc in soybeans. Chemical nature and bioavilability

Thesis/Dissertation · Thu Jan 01 00:00:00 EST 1987

OSTI ID:5900303

Khan, A

Soybeans were grown hydroponically and intrinsically labeled with /sup 65/Zn through root absorption, stem injection and foliar application. Stem injection resulted in the greatest accumulation of /sup 65/Zn. Regardless of the labeling technique, approximately 40-45% of the seed /sup 65/Zn was associated with the subcellular organelles. The pattern of /sup 65/Zn incorporation into soybeans did not change appreciably as a result of the labelling technique. The major portion of the soluble /sup 65/Zn was either free or associated with very low molecular weight proteins, peptides, or their complexes with phytic acid rather than the major proteins of soybeans. Zinc in soybeans is ionically bound to proteins, peptides and phytic acid. Autoclaving did not affect the chemical association of zinc with soy proteins. Solubility of protein, zinc and phytic acid was studied over the pH range of 3.5-12.0. Bioavailability of zinc to rats from soybeans was lower than from casein and rats adapted to a casein basal diet absorbed more /sup 65/Zn from both casein and soy than rats adapted to a soy basal diet.

• Research Organization: Purdue Univ., Lafayette, IN (USA)
• OSTI ID: 5900303
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
59 BASIC BIOLOGICAL SCIENCES
ZINC
BIOLOGICAL AVAILABILITY
METABOLISM
COMPLEXES
GLYCINE HISPIDA
PH VALUE
PHYTIC ACID
PROTEINS
RATS
ROOT ABSORPTION
SOYBEANS
TRACER TECHNIQUES
ZINC 65
ABSORPTION
ANIMALS
BACTERIA
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
DAYS LIVING RADIOISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTS
ESTERS
EVEN-ODD NUCLEI
FOOD
INTERMEDIATE MASS NUCLEI
ISOTOPE APPLICATIONS
ISOTOPES
LEGUMINOSAE
MAGNOLIOPHYTA
MAGNOLIOPSIDA
MAMMALS
METALS
MICROORGANISMS
NUCLEI
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PHOSPHORIC ACID ESTERS
PLANTS
RADIOISOTOPES
RHIZOBIUM
RODENTS
UPTAKE
VEGETABLES
VERTEBRATES
ZINC ISOTOPES
560300* - Chemicals Metabolism & Toxicology
550501 - Metabolism- Tracer Techniques