Biomineralization and eggshells: cell-mediated acellular compartments of mineralized extracellular matrix.
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Animals↗
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Clarification of the "eggshell skull" doctrine.
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Accidents↗
Acute hypercapnia and eggshell formation.
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Animals↗
Decrease in eggshell weight in certain birds of prey.
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Animals↗
DDT induces a decrease in eggshell calcium.
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Animal Feed↗
Dieldrin and eggshell thickness in ducks.
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Animals↗
DDE thins eggshells of captive American kestrels.
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Animals↗
Logarithmic relationship of DDE residues to eggshell thinning.
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Animals↗
Further analysis of the logarithmic relationship of DDE residues to eggshell thinning.
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Animals↗
Use of "whole egg residues" in pesticie-eggshell studies.
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Animals↗
Organochlorine residues, eggshell thinning and hatching success in British sparrowhawks.
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Animals↗
Prolonged eggshell thinning caused by DDE in the duck.
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Animals↗
Enzymatic basic for DDE-induced eggshell thinning in a sensitive bird.
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Adenosine Triphosphatases↗
Adaptive reduction in permeability of avian eggshells to water vapour at high altitudes.
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Adaptation, Physiological↗
Effect of dietary contents of cholecalciferol, 1 alpha,25-dihydroxycholecalciferol and 24,25-dihydroxycholecalciferol on blood concentrations of 25-hydroxycholecalciferol, 1 alpha,25-dihydroxycholecalciferol, total calcium and eggshell quality.
1. Withdrawal of cholecalciferol (D3) supplement from a layers diet drastically reduced blood 25-hydroxycholecalciferol (25-OH-D3), 1 alpha,25-dihydroxycholecalciferol (calcitriol) and egg specific gravity (SG) within two weeks, followed by a decrease in blood total calcium (Ca). 2. Doubling the D3 supplement in the control diet (27.5 micrograms or 1100 IU/kg) almost linearly increased the circulating concentration of 25-OH-D3 without raising the concentration of calcitriol, Ca, or egg SG. 3. Replacing D3 by the optimal concentration of calcitriol (5 micrograms/kg diet) improved egg SG after 21 weeks of treatment without increasing blood calcitriol or total Ca. 4. By itself, 24,25-dihydroxycholecalciferol [24,25-(OH)2D3] was unable to maintain normal blood levels of calcitriol, Ca or egg SG and, when added together with calcitriol in the diet, tended to elevate blood Ca but suppress the beneficial effect of calcitriol on shell quality, with little or no effect on blood calcitriol.
24,25-Dihydroxyvitamin D 3↗