Results 191 to 200 of about 4,931,841 (217)

A NON-DESTRUCTIVE EGGSHELL STRENGTH TESTER

Canadian Journal of Animal Science, 1970
not available
Peter W. Voisey, W. F. Foster
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The eggshell: strength, structure and function

British Poultry Science, 2010
In making a journey through the literature of the last 50 years one can easily highlight a sequence of seminal works-but the route has not been direct and to avoid the many profitable diversions and detours that have enriched and deepened our collective understanding of the subject of eggshell structure and function is to do the subject a serious ...
openaire   +2 more sources

Estimation of genetic parameters related to eggshell strength using random regression models

British Poultry Science, 2015
1. This study examined the changes in eggshell strength and the genetic parameters related to this trait throughout a hen’s laying life using random regression.2. The data were collected from a crossbred population between 2011 and 2014, where the eggshell strength was determined repeatedly for 2260 hens.3. Using random regression models (RRM), several
J. Guo, M. Ma, L. Qu, M. Shen, T. Dou, K. Wang   +5 more
semanticscholar   +3 more sources

ERRORS ASSOCIATED WITH AN EGGSHELL STRENGTH TESTER

Canadian Journal of Animal Science, 1969
not available
Peter W. Voisey, G. D. Robertson
openaire   +1 more source

Comparison of breaking strength and shell thickness as evaluators of eggshell quality

Environmental Toxicology and Chemistry, 1988
Abstract The shell quality of eggs produced by northern bobwhite (Colinus virginianus) dosed with sulfanilamide was evaluated by a compression breaking strength test and by the shell thickness measurements that are used in the U.S. Environmental Protection Agency avian reproduction test to determine the effect of a chemical substance on ...
Richard S Bennett
exaly   +2 more sources

Protoporphyrin and Eggshell Strength: Preliminary Findings from a Passerine Bird

Avian Biology Research, 2011
Protoporphyrin pigmentation is a common feature of passerine eggshells worldwide, typically giving red to brown coloration. Although these may form a background colour to the egg, protoporphyrin more commonly forms speckles, blotches or patches of colour (maculation) against a white (unpigmented) or blue/green (biliverdin-pigmented) background ...
Andrew G. Gosler, Richard H C Bonser
exaly   +2 more sources

Hen’s eggshell strength under impact loading

Journal of Food Engineering, 2009
Abstract An experimental method for evaluation of an eggshell’s mechanical characteristics under impact loading is discussed. Proposed experimental set up enables recording of time history of the force at the contact area between the rod and eggshell, as well as the vibration response of the tested egg.
Šárka Nedomová, Jan Trnka, Pavla Dvořáková, Jaroslav Buchar, Libor Severa   +4 more
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Mechanical properties of high strength concrete that replace cement partly by using fly ash and eggshell powder

Physics and Chemistry of the Earth, Parts A/B/C, 2020
Global warming, climate change and greenhouse gases all these phrases are becoming an essential and significant topic to talk about in media in recent moments. One of the main and most elements that effect is carbon dioxide (CO2).
A. Teara, Doh Shu Ing
semanticscholar   +1 more source

Breaking strength: An alternative indicator of toxic effects on avian eggshell quality

Environmental Toxicology and Chemistry, 1986
Abstract A method for measuring the breaking strength of avian eggshells is presented along with a brief review of the literature relating shell strength to chlorinated hydrocarbon exposure. The effect of dietary DDE on shell strength is compared with its effect on shell thickness in the mallard duck (Anas platyrhynchos L).
J. C. Carlisle, D. W. Lamb, P. A. Toll
exaly   +2 more sources

The relative fracture strengths of the inner and outer surfaces of the eggshell of the domestic fowl

Proceedings of the Royal Society of London. Series B: Biological Sciences, 1995
A method is described for comparing the strength of the material near the inner and outer surfaces of the eggshell of the domestic fowl. Half eggs with blunt poles, obtained by cutting the egg around the equator, were subjected to concentric loading through neoprene O-rings, respectively 7 mm and 15.5 mm diameter.
K M, Entwistle, H, Silyn-Roberts, S, Ochieng Abuodha   +2 more
openaire   +2 more sources