scholarly journals The Influence of Egg Shell Formation and the Autonomic Inhibitory Drugs Atropine, Phenoxybenzamine and Propranolol on 45Ca Loss from the Plasma of the Domestic Hen

1974 ◽  
Vol 53 (3) ◽  
pp. 1061-1066
Author(s):  
E.A. Grant ◽  
C.O. Parkes
Keyword(s):  
Shell Formation ◽  
Egg Shell ◽  
Domestic Hen

Role of magnesium in egg shell formation in the domestic hen

1991 ◽  
Vol 32 (4) ◽  
pp. 853-864 ◽  
Author(s):  
A. L. Waddell ◽  
R. G. Board ◽  
V. D. Scott ◽  
S. G. Tullett
Keyword(s):  
Shell Formation ◽  
Egg Shell ◽  
Domestic Hen

A CYTOLOGICAL AND CYTOCHEMICAL STUDY OF THE SHELL GLAND OF THE DOMESTIC HEN

1953 ◽  
Vol 31 (6) ◽  
pp. 577-589 ◽  
Author(s):  
D. J. McCallion
Keyword(s):  
Shell Gland ◽  
Ciliated Epithelium ◽  
Shell Formation ◽  
Cytochemical Study ◽  
Negative Results ◽  
Inner Surface ◽  
Secretory Products ◽  
Egg Shell ◽  
Domestic Hen ◽  
Positive Results

A cytological and cytochemical study has been made of the oviducts of hens producing thick shelled eggs and of hens producing thin shelled eggs, with special reference to the shell gland. No significant differences between them were discovered. The inner surface of the oviduct of the hen is lined with ciliated epithelium containing two types of cells, ciliated and goblet. Lying under the ciliated lining are the tubular glands of the oviduct. The Golgi apparatus has been described in the several types of cells. The secretory products of these cells have been identified in the various parts of the oviduct. Small amounts of calcium were shown to be present in the oviduct by one of several techniques, the others giving negative results. Slight positive results were obtained for the presence of phosphates. Alkaline phosphatase was present in slight and varying amounts uniformly distributed in the oviduct, but acid phosphatase was confined to the ciliated epithelium. Glycogen was not present in the glandular tissues. The deposition of calcium as egg shell seems to be different from that in bone formation. Possible mechanisms of egg shell formation are discussed.

scholarly journals The Effect of Lithium Carbonate on Egg Shell Formation and Serum Calcium Level of the Hen

1971 ◽  
Vol 50 (2) ◽  
pp. 577-580 ◽  
Author(s):  
R.D. Creek ◽  
Pauline Lund ◽  
O.P. Thomas ◽  
W.O. Pollard
Keyword(s):  
Serum Calcium ◽  
Calcium Level ◽  
Serum Calcium Level ◽  
Lithium Carbonate ◽  
Shell Formation ◽  
Egg Shell

SULFONAMIDES AND EGG-SHELL FORMATION IN THE DOMESTIC FOWL

Science ◽  
1945 ◽  
Vol 101 (2633) ◽  
pp. 617-618 ◽  
Author(s):  
R. BERNARD ◽  
P. GENEST
Keyword(s):  
Domestic Fowl ◽  
Shell Formation ◽  
Egg Shell

Studies on the structure of the female reproductive system and egg-shell formation inAspiculuris tetrapteraSchulz, (Nematoda: Oxyuroidea)

Parasitology ◽  
1964 ◽  
Vol 54 (4) ◽  
pp. 699-719 ◽  
Author(s):  
A. O. Anya
Keyword(s):  
Reproductive System ◽  
Shell Formation ◽  
Female Reproductive System ◽  
High Concentration ◽  
Classical Study ◽  
Quinone Tanning ◽  
Phenolic Substances ◽  
Egg Shell ◽  
Exogenous Origin ◽  
Aspiculuris Tetraptera

The histological anatomy of the female reproductive system of an oxyuroid nematode,Aspiculuris tetraptera, Schulz, has been described.The process of egg-shell formation in this animal has been followed in detail while the structural and chemical characteristics of the egg-shell have been studied by histochemical and other methods. It is shown that there are three layers: a lipoprotein layer, a ‘chitinous’ layer and the so-called vitelline (glycosidal) membrane. Evidence is presented for the exogenous origin of the lipoprotein layer: this being formed by the cells of the upper uterus which are shown to be secretory.The question of quinone-tanning in the egg-shell ofA. tetrapteraand in other oxyuroids and ascarids is considered. It is shown that neither a polyphenol oxidase nor a high concentration of phenolic substances (apart from protein tyrosine) exists in this system. The significance of these and other observations is discussed in relation to the mechanism of tanning as elucidated in insects and trematodes.I have to acknowledge with gratitude the support of many during these investigations. To Dr P. Tate for his encouragement and provision of facilities at the Molteno Institute; to Dr D. L. Lee, for much useful discussion and permission to refer to some of his unpublished electron micrographs of nematodes; to Professor J. D. Smyth, who kindly read through the manuscript; to the Cambridge Philosophical Society for a grant that made possible the translation of Fauré-Frémiet's classical study onAscaris;and to the Department of Technical Cooperation for financial assistance.

scholarly journals Intracellular pH during calcification. A study of the avian shell gland

1969 ◽  
Vol 111 (5) ◽  
pp. 647-652 ◽  
Author(s):  
K. Simkiss
Keyword(s):  
Intracellular Ph ◽  
Domestic Fowl ◽  
Shell Gland ◽  
Shell Formation ◽  
Extracellular Water ◽  
Rapid Fall ◽  
Egg Shell

The intracellular pH of the shell gland of the domestic fowl was calculated at various stages in egg-shell formation. The calculation is based on the distribution of 5,5-dimethyloxazolidine-2,4-dione between intracellular and extracellular water. The results show a rapid fall in intracellular pH at the time of mineralization and this is interpreted as indicating a removal of protons from the site of calcification.

The tylenchid (Nematoda) egg shell: formation of the egg shell in Meloidogyne javanica

Parasitology ◽  
1976 ◽  
Vol 72 (1) ◽  
pp. 29-39 ◽  
Author(s):  
Michael A. McClure ◽  
A. F. Bird
Keyword(s):  
Endoplasmic Reticulum ◽  
Meloidogyne Javanica ◽  
Distal Portion ◽  
Shell Formation ◽  
Lipid Layer ◽  
Dense Cytoplasm ◽  
Cytoplasmic Bridges ◽  
Pass Through ◽  
Egg Shell ◽  
Lipid Layers

SummaryOogonia of Meloidogyne javanica are radially arranged around a central rachis to which they are attached by cytoplasmic bridges. As the oocytes mature the rachis disappears and the oocytes pass through the oviduct in tandem. The oviduct-spermatotheca valve is constructed of two rows of tightly packed cells of which there are four per row. The nuclei of these cells are large and contain balloon-shaped cytoplasmic invaginations. The spermatotheca is characterized by microtubules which extend to its lumen and by invaginations of plasmalemma. Cells of the distal uterine region contain large intracytoplasmic spaces bordered by endoplasmic reticulum whereas proximal uterine cells have dense cytoplasm and large areas of compact endoplasmic reticulum. Egg-shell formation begins in the spermatotheca with the modification of the oolemma to form the vitelline layer. The chitinous layer begins in the distal portion of the uterus and appears to originate from the egg. Proline-containing protein is incorporated into the chitinous and lipid layers as the egg passes through the mid-region of the uterus and formation of the lipid layer in this region completes egg development.

Sign in / Sign up

Export Citation Format

Share Document