The Synthesis of Lipid-soluble Vitamins

Fat-soluble vitamins.

Water-soluble vitamins.

 B-complex vitamins and vitamin C are water-soluble vitamins that are not stored in the body and must be replaced each day.  These vitamins are easily destroyed or washed out during food storage and preparation.  The B-complex group is found in a variety of foods: cereal grains, meat, poultry, eggs, fish, milk, legumes and fresh vegetables.  Citrus fruits are good sources of vitamin C.  Us...

Absorption of water-soluble vitamins.

The water-soluble vitamins vary widely in chemical structure and properties, so it is not surprising that the characteristics of absorption of individual members of the group also show differences. Water-soluble vitamins are absorbed mainly into the blood, some very freely (e.g. ascorbic acid), others (e.g. thiamine) only in limited amounts. Vitamin Biz has an apparently unique mode of absorpti...

comparison of catalytic activity of heteropoly compounds in the synthesis of bis(indolyl)alkanes.

heteropoly acids (hpa) and their salts have advantages as catalysts which make them both economically and environmentally attractive, strong br?nsted acidity, exhibiting fast reversible multi-electron redox transformations under rather mild conditions, very high solubility in polar solvents, fairly high thermal stability in the solid states, and efficient oxidizing ability, so that they are imp...

The fat-soluble vitamins in poultry nutrition.

30. James, E. M., Norris, F. W. & Wokes, F. (1947). Analyst, 72, 327. 31. Jones, C. R. & M o m , T. (1946). Cereal Chem. m, @. 32. Jukes, T. H. (2941). J. Nutn’t. 21, 193. 33. Kemmerer, A. R. & Fraps, G. S. (1945). Bull. Tex. ag& Exp. Stu. no. 671. 34. Krehl, W. A., Huerga, J. de la, Elvehjem, C. A. & Hart, E. B. (1946). J . biol. C h . 166, 53. 35. Lillie, R. J. & Briggs, G. M. (1947). Poult. ...