4 edition of Evaluation of zinc metabolism using two stable isotopes of zinc found in the catalog.
Evaluation of zinc metabolism using two stable isotopes of zinc
Ram Michael Reifen
Thesis (M.Sc.)--University of Toronto, 1993.
|Series||Canadian theses = Thèses canadiennes|
|The Physical Object|
|Pagination||1 microfiche : negative.|
To help boost your metabolism, zinc reduces hunger by increasing your level of leptin, a key hormone that alerts the body when you're full so you won't keep eating when you're no longer hungry. You can buy zinc in 15mg packets or simply get it from your multivitamin, which usually contains about 12mg of this essential mineral. Generally a retest for zinc along with clinical evaluation of symptoms is done after months of treatment to determine if dosages need adjustment. Zinc depletion is corrected by supplementation with specific forms of zinc along with supporting nutrients. Correction of zinc deficiency is best accomplished under the care of a physician or.
The metabolic role of zinc has been studied for many years, 1 but it was not until that Keilin and Mann offered the first concrete explanation of its mode of action. 2 They showed that the enzyme carbonic anhydrase contains % zinc as a part of its molecule and that zinc is essential to the elimination of carbon dioxide. Thus, zinc and iron have been shown to be components of two Cited by: Zinc Metabolism. Tweet: In the lumen of the small intestine, there is a factor (picolinic acid) that binds zinc, and is excreted by pancreas. To synthesized picolinic acid it is needed the presence of vitamin B6. Zinc picolinate complex is transported through the cell in the small intestine, and then to the liver where it .
Zinc is a chemical element with the symbol Zn and atomic number It is the first element in group 12 of the periodic some respects zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn 2+ and Mg 2+ ions are of similar size. Zinc is the 24th most abundant element in Earth's crust and has five stable isotopes. Abstract The existence of zinc radioactivities with half-lives 57 minutes and hours is confirmed, by deuteron activation of zinc. In addition, it is found that both these activities are produced by deuteron and by fast neutron irradiation of gallium, so that the two periods must be due to isomers of Zn Both emit negative electrons and the properties of their radiations are given.
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Such studies address the effect of zinc dose [,], fortification with zinc [,] habitual diets [37,43] and avoiding high phytate diets [36,73,] However, there are no studies to date applying zinc stable isotope techniques to assess zinc metabolism and homeostasis in children in low-middle income countries with acute Cited by: 6.
Naturally occurring zinc (30 Zn) is composed of the 5 stable isotopes 64 Zn, 66 Zn, 67 Zn, 68 Zn, and 70 Zn with 64 Zn being the most abundant (% natural abundance).Twenty-five radioisotopes have been characterised with the most abundant and stable being 65 Zn with a half-life of days, and 72 Zn with a half-life of hours.
All of the remaining radioactive isotopes have half Standard atomic weight A(Zn): (2). Zinc stable isotopes can be applied to the identification of populations at risk for zinc deficiency and to monitoring the effects of zinc intervention studies designed to improve zinc nutriture.
Zinc is a chemical element with the symbol Zn and atomic number Zinc is a slightly brittle metal at room temperature and has a blue-silvery appearance when oxidation is removed. It is the first element in group 12 of the periodic some respects, zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn 2+ and Mg 2+ ions are of Group: group Istfan et al.
fed young men a formula diet containing either or 15 mg zinc/day and measured zinc absorption using the method of stable tracer isotope neutron activation analysis in a fasted state after 6 days.
Zinc absorption was 92% from the low zinc diet and 81% from the high zinc by: The Element Zinc - Known Isotopes. Most of the isotope data on this site has been obtained from the National Nuclear Data visit their site for more information.
Isotopes With A. Zinc is a chemical element with the atomic num represented by the chemical symbol Zn. Linus Pauling Institute. Zinc is an essential element in the nutrition of human beings, animals, and plants.
Zinc is required in the genetic make-up of every cell and is an. Zinc isotopes are used extensively in both industrial and medical applications. Depleted Zn is added to the cooling water of nuclear reactors in the form of oxide or acetate to prevent stress corrosion cracking.
It also reduces the release of (stable) Co into the cooling water by forming a thin spinel layer on the Co containing steel.
Use of Stable Isotopes to Evaluate Bioefficacy of Provitamin A Carotenoids, Vitamin A Status, and Bioavailability of Iron and Zinc Article (PDF Available) in Advances in Nutrition 9(5) Zinc Isotopes are used extensively in both industrial and medical applications.
Depleted Zn is added to the cooling water of nuclear reactors in the form of oxide or acetate to prevent stress corrosion cracking. It also reduces the release of (stable) Co into the cooling water by forming a thin spinel layer on the Co containing steel. EFZ loss can be estimated from the amount of zinc excreted in the stool (using stable isotope methods) when a zinc-free diet is fed and is estimated to be approximately 6–8 μmol/day.
Adjustments in excretion of intestinal endogenous zinc to changes in zinc intake can be maintained over prolonged periods [60,67].Cited by: 6. ZINC METABOLISM 1. Zinc Metabolism 2. • Zinc is a trace mineral. • Total body content of zinc is about 2 gm. • Prostate gland is very rich in Zn ( mg/g).
• Zn is mainly an intracellular element. • About 60% of zinc is present in muscle and 30% in bone. • It is also present in liver, brain and skin. Zinc absorption estimated from whole-body retention was 27 ± 6% (x̄ ± SD), estimated zinc absorption obtained by fecal monitoring of radioisotope was 26 ± 9%, and the two stable zinc measurements resulted in values of 29 ± 12 and 33 ± 12%, by: Enriched stable isotopes were used in nutrition studies of normal, healthy adults to measure zinc, copper, and iron absorption.
After obtaining baseline values for zinc, copper, and iron absorption from diets adequate in all nutrients, the effects of age, pregnancy, and deveral dietary variables were studied.
Stable isotopes of zinc, copper, and iron were incorporated into by: 6. Dual-isotope techniques for measurement of Ca and Zn absorption, using urinary excretion of oral and i.v.
administered stable isotopes of these minerals, have been described and Cited by: Naveh Y, Schapira D, Ravel Y, et al. Zinc metabolism in rheumatoid arthritis: plasma and urinary zinc and relationship to disease activity.
J Rheumatol ; View abstract. There are five naturally occurring stable isotopes of zinc. Two are widely used in clinical studies (67 Zn and 70 Zn) and a third (68 Zn) can be used in some situations. Assessment of zinc isotopes in blood and urine is one of the more readily performed mineral stable isotope analysis by mass : Steven Abrams.
The three phases of discoveries in zinc biology. Top: Discoveries that led to the recognition of zinc as an essential nutrient began with Jules Raulin's seminal investigations of the dependence of Aspergillus niger on zinc for growth and culminated in the discovery of zinc deficiency in humans by Ananda Prasad.
Middle: Discoveries of zinc as a cofactor of proteins also has a defined Cited by: Zinc is the 24th most abundant element in the Earth's crust and has five stable isotopes. The most common zinc ore is sphalerite, a zinc sulfide.
The largest mineable amounts are found in Australia, Asia, and the United States. Zinc production includes froth flotation of the ore, roasting, and final extraction using electricity (electrowinning).
Tracer kinetic techniques based on zinc stable isotopes have a vital role in advancing knowledge of human zinc physiology and homeostasis. These techniques have demonstrated the complexity of zinc metabolism, and have been critical to estimating the size and interrelationships of those pools of zinc that exchange rapidly with zinc in plasma and Cited by:.
The first 3 isotopes are stable isotopes and the last one is radiogenic. There are two methods presently available for silicon isotope analyses such as gas source isotope ratio mass-spectrometry (IRMS) and secondary ion microprobe mass-spectrometry (SIMS).
The IRMS is a routine method and suitable for all kinds of samples.Production of Stable Isotopes for Nutrition-related Research, 3. The Measurement of Protein Kinetics with Stable Isotope Tracers, 4.
Stable Isotope Studies of Mineral Metabolism: Calcium, Magnesium and Iron, 5. Evaluation of Trace Mineral Status and Bioavailability Using Stable Isotopes (Zinc, Copper, Selenium, Molybdenum), 6.4 Stable Isotope Studies of Mineral Metabolism: Calcium, Magnesium and Iron 35 S.A.
Abrams 5 Evaluation of Trace Mineral Status and Bioavailability Using Stable Isotopes (Zinc, Copper, Selenium, Molybdenum) 61 N.M. Lowe and C.S. Broome 6 Energy Utilization with Doubly Labelled Water (2H 2 18O) 85 W.W. Wong.