A study of the urinary zinc excretion pattern of diabetic subjects, relatives of diabetics and controls has been undertaken. Diabetics show a significant hyperzincuria as compared with controls. Family studies have indicated that urinary zinc excretion could be under polygenic control. The genes involved could be important in the diabetic and prediabetic diathesis.

Ion exchanges in analytical chemistry

Hyperzincuria of Diabetes Mellitus and Possible Genetical Implications of This Observation

Organic matter was extracted with a mixture of 0.1M Na4P2O7 and 0.1M NaOH from soil and a commercial organic matter product, ‘Aqua Humus’, and separated into humic and fulvic acids according to their solubility in acid and alkaline solutions. They were purified by passage through a cation exchange resin, freeze-dried, and used for characterization and seedling growth studies. The CEC increased with pH for both humic and fulvic acids. Data from tobacco seedling studies show that humic and fulvic acids from both sources increased root number and length at low concentrations while at high concentrations, humic acids inhibited length and number of roots but fulvic acids had no effect. The results support the proposition that fractions of organic matter referred to as humic and fulvic acids affect root development by means other than as a source of nutrients.

Effects of humic and fulvic acids on growth of tobacco

1: Basic terms of radioactivity R. Tykva. 1. Development of our knowledge. 2. Nuclides. 3. Characterization of radionuclides. 4. Activity expressions. 5. Doses. 2: Radionuclides in the environment D. Berg. 1. Naturally occurring radionuclides in the environment. 2. Artificially produced radionuclides. 3. Behaviour of radioactive substances in the environment. 3: Radionuclides released into the environment D. Berg. 1. Contamination of the environment by naturally occurring radionuclides. 2. Contamination by artificially produced radionuclides. 4: Application of environmental radionuclides in radiochronology J. Kosler, J. Silar, E. Jelinek. 1. General concept of the radiochronology J. Silar. 2. Radiocarbon J. Silar. 3. Tritium J. Silar. 4. Radiocarbon and tritium dating in science and technology J. Silar. 5. Other radionuclides dating methods J. Silar. 6. K - Ar and Ar - Ar dating methods E. Jelinek. 7. Rb - Sr dating method E. Jelinek. 8. Sm - Nd method J. Kosler. 9. U - Th - Pb dating J. Kosler. 10. Re - Os dating method E. Jelinek, J. Kosler. 11. Lu - Hf dating method E. Jelinek. 5: Radionuclide analyses R. Tykva, J. Kosler. 1. Activity measurements R. Tykva. 2. Analytical techniques in radiogenic dating J. Kosler. References. Abbreviations. Index.

Man-made and natural radioactivity in environmental pollution and radiochronology

The in vitro cultivation of strigeid trematodes. III. Yeast as a medium constituent

Deux methodes de synthese de derives tributyl ammonium du copolymere reticule methacrylate de glycidyle-ethylene dimethacrylate: 1) en deux etapes, modification du groupe epoxyde par une dialkylamine puis alkylation avec un halogenure d'alkyle; 2) en une etape, reaction du groupe epoxyde avec une trialkylamine

http://link.springer.com/content/pdf/10.1007/BF00254948.pdf

Ion exchanges in analytical chemistry

Citations

Hyperzincuria of Diabetes Mellitus and Possible Genetical Implications of This Observation

Effects of humic and fulvic acids on growth of tobacco

Man-made and natural radioactivity in environmental pollution and radiochronology

The in vitro cultivation of strigeid trematodes. III. Yeast as a medium constituent

Reactive polymers. LIV: Synthesis of methacrylate copolymers with tributylammonium groups

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