Effect of Vitamin D and Ca:P Ratios on Chick Gastrointestinal Tract

The effect of feeding diets containing various Ca:P ratios (4:1, 1:1, 1:2) to rachitic and nonrachitic chicks has been studied. The Ca:P ratios used had no significant effect on Ca absorption in chicks receiving vitamin D but were of importance in the Ca absorption of rachitic chicks. Vitamin D was found to increase Ca absorption in chick duodenum but had no effect on glucose absorption. Increased peristalsis was obtained when vitamin D or the least rachitogenic Ca:P ratio (1:1) was fed. A possible increase in intestinal mucosa respiration was also observed when vitamin D or the 1:1 Ca:P ratio was fed.

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Effects of Vitamin D on Phosphate Transport and Incorporation into Mucosal Constituents of Rat Intestinal Mucosa

Journal of Biological Chemistry ◽

10.1016/s0021-9258(19)78212-x ◽

1969 ◽

Vol 244 (1) ◽

pp. 211-217

Author(s):

S Kowarski ◽

D Schachter

Keyword(s):

Vitamin D ◽

Intestinal Mucosa ◽

Phosphate Transport

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EFFECT OF FEEDING DIETS EXPOSED TO ETHYLENE OXIDE

Nutrition Reviews ◽

10.1111/j.1753-4887.1956.tb01478.x ◽

2009 ◽

Vol 14 (2) ◽

pp. 55-56

Keyword(s):

Ethylene Oxide ◽

Feeding Diets ◽

Effect Of Feeding

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255 Evaluation of Different Corn Milling Methods for High-moisture and Dry Corn on Nutrient Digestion

Journal of Animal Science ◽

10.1093/jas/skab054.207 ◽

2021 ◽

Vol 99 (Supplement_1) ◽

pp. 124-125

Author(s):

Caitlin A Coulson ◽

Nicole Woita ◽

Tyler Spore ◽

Hannah Wilson ◽

Kylie Butterfield ◽

...

Keyword(s):

Dry Matter ◽

Milling Process ◽

Nutrient Digestibility ◽

Hammer Mill ◽

High Moisture ◽

Roller Mill ◽

Nutrient Digestion ◽

Milling Method ◽

Feeding Diets ◽

Effect Of Feeding

Abstract A 2 × 2 factorial digestion study using seven ruminally cannulated steers evaluated the effect of feeding diets containing 70% (dry matter-basis) high-moisture (HMC) or dry corn (DC), processed with either a hammer mill or Automatic Ag Roller Mill (Pender, NE), on nutrient digestion. Feeding HMC decreased the amount of excreted dry matter (DM) and organic matter (OM; P ≤ 0.01) regardless of mill type, but there was a tendency (P ≤ 0.13) for an interaction between corn type and mill type for DM and OM digestibility. There was no difference between either milling treatments fed as HMC (P ≥ 0.69), but the hammer mill DC diet was more digestible than the roller mill DC (P = 0.05). There was no effect on NDF digestibility, but there was a tendency for an interaction between grain type and processing method for ADF digestibility, with the roller mill DC diet having the lowest (P = 0.02) ADF digestibility and no differences (P ≥ 0.15) among the other treatments. As expected, HMC based diets had greater (P < 0.01) starch digestibility compared to DC, but milling method had no effect (P = 0.56). High moisture corn diets had greater (P = 0.01) DE intake (Mcal/kg), and hammer mill DC tended to be greater (P = 0.07) than roller mill DC. There tended (P = 0.07) to be an interaction for minimum pH, with roller mill HMC and hammer mill DC having the lowest average pH, but not different from hammer mill HMC (P ≥ 0.32). There were no differences (P = 0.56) in average pH, but HMC diets had greater variance (P = 0.04) and greater area under pH 5.6 (P = 0.05) compared to DC based diets. Feeding cattle HMC compared to DC increases nutrient digestibility but milling process had little impact.

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Tissue distribution and vitamin D dependence of IMCAL in the rat

AJP Gastrointestinal and Liver Physiology ◽

10.1152/ajpgi.1987.253.3.g411 ◽

1987 ◽

Vol 253 (3) ◽

pp. G411-G419

Author(s):

S. Kowarski ◽

L. A. Cowen ◽

M. T. Takahashi ◽

D. Schachter

Keyword(s):

Vitamin D ◽

Tissue Distribution ◽

Intestinal Mucosa ◽

Plasma Membranes ◽

Duodenal Mucosa ◽

Calcium Flux ◽

Small Intestinal Mucosa ◽

Calcium Diet ◽

High Calcium ◽

Cecal Mucosa

Integral membrane calcium-binding protein (IMCAL) is a vitamin D-dependent integral membrane protein that binds calcium with relatively high affinity (J. Biol. Chem. 225: 10834-10840, 1980). Specific immunoassays for IMCAL utilizing rabbit polyclonal and mouse monoclonal antibodies were developed and applied to studies of its tissue distribution and regulation by vitamin D3 and dietary calcium in the rat. The results indicate that vitamin D-dependent, cross-reactive protein is present in small intestinal mucosa, cecal mucosa, bone, kidney, brain, testis, heart, lung, spleen, and skin. Rats maintained on a low- (0.02%) compared with & high- (2.0%) calcium diet had significantly higher content of IMCAL in duodenal mucosa, cecal mucosa, bone, kidney, brain, testis, and heart. Treatment of rats on the high-calcium diet with 1,25-dihydroxyvitamin D3 increased the IMCAL content of the duodenal mucosa, cecal mucosa, and kidney. The widespread tissue distribution of vitamin D-dependent IMCAL, its close correlation in intestinal mucosa with the calcium transport mechanism, and its occurrence in isolated preparations of enterocyte plasma membranes (microvillus and basolateral membranes) suggest that the protein is involved in the regulation of calcium flux in a number of cell types.

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