Zobrazeno 1 - 10
of 21
pro vyhledávání: '"R. M. Conrad"'
Autor:
R. M. Conrad, H. M. Scott
Publikováno v:
Poultry Science. 21:81-85
THERE is considerable variation in total egg weight in a series of eggs laid on consecutive days by an individual hen. Scott (1938) concluded that the major part of this variation, associated with the position of the egg within the clutch, is due pri
Publikováno v:
The American Naturalist. 77:481-518
Publikováno v:
Poultry Science. 17:498-504
SINCE the work of Pearl and Curtis (1912) it has been known that 40 to 50 percent of the weight of the egg white is added during the time it is in the uterus, hence after the formation of the shell membranes. Very little is yet known of the compositi
Publikováno v:
Poultry Science. 26:14-19
THE complaint is occasionally heard that chickens or turkeys obtained from commercial storage or frozen food lockers were found to be rancid. The fact that large numbers of frozen birds are satisfactorily preserved in storage would indicate that ranc
Autor:
D. C. Warren, R. M. Conrad
Publikováno v:
Poultry Science. 18:220-224
ALTERNATE white and yellow layers in the yolk are described in most textbook discussions of the hen’s egg. According to Lillie (1919) these were pointed out by Meckel V. Hemsback in 1851. They have frequently been described and discussed since. Rid
Autor:
R. M. Conrad, D. C. Warren
Publikováno v:
Poultry Science. 19:9-17
HEN eggs containing more than one yolk frequently have been described in the hope that this rather common abnormal functioning of the reproductive organs might throw some light on the normal mechanism of egg formation. Most of these publications are
Publikováno v:
Endocrinology. 27:83-86
RIDDLE AND DOTTI (1) reported that sufficient and prolonged doses of certain female sex hormones, notably theelin and to a lesser degree dihydrotheelin and theelol progestrone, increased the serum calcium in normal castrate hypophysectomized, thyroid
Autor:
R. M. Conrad, R. E. Phillips
Publikováno v:
Poultry Science. 17:143-146
THERE has been a widespread belief that the chalazae and the chalaziferous layer of white surrounding the yolk of the hen’s egg are deposited before the remainder of the egg white. It was thought that a specific secretory mechanism was responsible
Autor:
R. M. Conrad, H. M. Scott
Publikováno v:
Physiological Reviews. 18:481-494
Autor:
R. M. Conrad, H. M. Scott
Publikováno v:
Poultry Science. 21:77-80
WHILE it is well known that fresh eggs differ greatly in apparent quality, the reasons for this difference have not been extensively studied. Cole (1938) has reported that this difference in quality is related to the size of the goblet cells of the m