Assimilation Of Calcium Research Articles

Effect of Manganese, Copper, and Zinc on Growth and Metabolism of Aspergillus Flavus and Rhizopus Nigricans

1. Cultures of Aspergillus made a heavier, more rapid growth in a medium containing certain concentrations of manganese, copper, or zinc than in a medium free from these metals. 2. The optimum concentrations of these metals were low, and slightly larger quantities became toxic. 3. Combinations of the optimum concentrations of manganese, copper, and zinc stimulated a greater growth than did any one of the three metals, and all three produced a greater growth than did the combination of any two of these metals. 4. Manganese, copper, and zinc in the medium influenced slightly the assimilation of phosphorus, magnesium, and calcium. 5. The nitrogen content of Aspergillus grown in media containing manganese, copper, and zinc, or combinations of these elements, was less than in control cultures. 6. The fat content (ether extract) of Aspergillus was increased by manganese, copper, and zinc.

STUDIES OF CALCIUM AND PHOSPHORUS METABOLISM

In the course of our studies in calciulm metabolism evidence has steadily accumulated that the metabolism of acid-producing substances plays an important r6le in influencing the assimilation and excretion of calcium. This effect, however, has not been adequately studied in man, and in other studies of calcium exchange the potential acidity or alkalinity of foods and medication has largely been neglected. It is the purpose of the present investigation to follow the effect of food-stuffs and inorganic salts on calcium metabolism with relation to their potential acidity (after oxidation) referred to the hydrogen ion concentration of the blood. Studies in rickets for some time have indicated the importance of acidity to the assimilation and storage of inorganic salts in bone. Thus, McClendon (1) noted that the addition of alkali to a diet increased its power to produce rickets and, conversely, Zucker, Johnson, and Barnett (2) reported that the change in acidity of diets from the alkaline toward the acid side of neutrality might result in healing of the rachitic lesions. Much work, too, has been done upon the effect of administered acid on the mineral excretion. The experiments of Givens and Mendel (3) and of Givens (4) upon the effect of base and acid on the general metabolism tended to minimize variations in calcium excretion resulting from this factor. Subsequently, Goto (5), using rabbits, demonstrated depletion of the skeleton by repeated doses of hydrochloric acid. Lamb and Evvard (6) demonstrated increased urinary calcium

Weak Bones in Crate Fed Poultry

The finishing of market poultry by special feeding under close confinement for a short time before slaughter has during recent years become a general practice. The length of the profitable feeding period varies somewhat with the age, variety and inherent vigor of the stock and ranges from 7 to 20 days.Practical feeders have often reported a considerable loss from leg and wing breakage when crate fed broilers and springs have been dressed after the feeding period. The questions which immediately present themselves are,—Is the reported bone weakness due to lack of exercise during the feeding period, lack of inorganic elements in the ration used, lack of radiant energy which is now known to affect the assimilation of calcium and phosphorus, or is it due to an inherent lack of vigor in some of the stock received at the feeding stations. A series of experiments aimed .

A Study of Calcium and Phosphorus Balances with Dairy Cattle

Summary 1. The results of twelve determinations of the balances of intake against outgo of calcium and phosphorus with liberally milking dairy cows are given. 2. A better assimilation of calcium resulted when clover hay instead of timothy was fed as part of a ration which included corn silage and a grain mixture. 3. A better assimilation of calcium occurred under conditions where protein of supposedly higher quality was fed through the medium of clover hay. 4. Some independence between calcium and phosphorus assimilation was observed. 5. Better assimilation of phosphorus occurred when more ample provision was made for this element in the grain mixture. 6. There was but little variation in the calcium and phosphorus content of the milk under the conditions studied. The percentage of phosphorus in the milk seemed to increase slightly in response to an increased supply in the feed.

The Influence of Small Quantities of Potassium Iodide on the Assimilation of Nitrogen, Phosphorus and Calcium in the Growing Pig

Research Article| January 01 1925 The Influence of Small Quantities of Potassium Iodide on the Assimilation of Nitrogen, Phosphorus and Calcium in the Growing Pig Francis Charles Kelly Francis Charles Kelly 1The Rowett Research Institute, Aberdeen Search for other works by this author on: This Site PubMed Google Scholar Biochem J (1925) 19 (4): 559–568. https://doi.org/10.1042/bj0190559 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Facebook Twitter LinkedIn MailTo Cite Icon Cite Get Permissions Citation Francis Charles Kelly; The Influence of Small Quantities of Potassium Iodide on the Assimilation of Nitrogen, Phosphorus and Calcium in the Growing Pig. Biochem J 1 January 1925; 19 (4): 559–568. doi: https://doi.org/10.1042/bj0190559 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll JournalsBiochemical Journal Search Advanced Search This content is only available as a PDF. © 1925 CAMBRIDGE UNIVERSITY PRESS1925 Article PDF first page preview Close Modal You do not currently have access to this content.

The Influence of Cod-Liver Oil, Linseed Oil and Olive Oil on the Assimilation of Calcium and Phosphorus in the Growing Pig

Research Article| January 01 1923 The Influence of Cod-Liver Oil, Linseed Oil and Olive Oil on the Assimilation of Calcium and Phosphorus in the Growing Pig Alfred Dudley Husband; Alfred Dudley Husband 1The Rowett Research Institute, Aberdeen Search for other works by this author on: This Site PubMed Google Scholar William Godden; William Godden 1The Rowett Research Institute, Aberdeen Search for other works by this author on: This Site PubMed Google Scholar Marion Brock Richards Marion Brock Richards 1The Rowett Research Institute, Aberdeen Search for other works by this author on: This Site PubMed Google Scholar Biochem J (1923) 17 (6): 707–719. https://doi.org/10.1042/bj0170707 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Facebook Twitter LinkedIn MailTo Cite Icon Cite Get Permissions Citation Alfred Dudley Husband, William Godden, Marion Brock Richards; The Influence of Cod-Liver Oil, Linseed Oil and Olive Oil on the Assimilation of Calcium and Phosphorus in the Growing Pig. Biochem J 1 January 1923; 17 (6): 707–719. doi: https://doi.org/10.1042/bj0170707 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll JournalsBiochemical Journal Search Advanced Search This content is only available as a PDF. © 1923 CAMBRIDGE UNIVERSITY PRESS1923 Article PDF first page preview Close Modal You do not currently have access to this content.

EXPERIMENTAL RICKETS IN RATS

1. A simple diet is presented which regularly induced rickets in young rats. 2. The substitution of 0.4 per cent secondary potassium phosphate for a small part of calcium lactate in this diet completely inhibited the development of rickets. 3. Quantitative determinations of calcium in the bodies of parallel rats showed a marked increase of calcium content in the rats receiving the added phosphate over those which developed rickets. 4. While it is thus shown by x-rays and by histological examinations and by quantitative chemical analysis that added potassium phosphate increased the assimilation and normal deposition of calcium, it may be the quantitative relationship between the inorganic ions rather than actual deficiency of any one of them which was here the determining factor in the cause or prevention of rickets. Our experiments and conclusions do not exclude the possibility of other causes of rickets than those here discussed.