Correlation of ammonia liberation and calcium deposition by the avian egg and blood ammonia levels in the laying hen

1972 ◽  
Vol 28 (5) ◽  
pp. 530-532 ◽  
Author(s):  
G. Reddy ◽  
J. W. Campbell
Keyword(s):  
Laying Hen ◽  
Calcium Deposition ◽  
Blood Ammonia ◽  
Ammonia Liberation ◽  
Avian Egg

scholarly journals Calcium deposition in egg due to substitution of limestone by eggshell flour in feed of laying hens

2018 ◽  
Vol 43 (3) ◽  
pp. 257 ◽  
Author(s):  
S. Kismiati ◽  
T. Yuwanta ◽  
Z. Zuprizal ◽  
S. Supadmo ◽  
U. Atmomarsono
Keyword(s):  
Laying Hens ◽  
Egg Yolk ◽  
Laying Hen ◽  
Calcium Deposition ◽  
Experimental Unit ◽  
Egg Weight ◽  
Tibia Bone ◽  
Randomized Design

The aim of this research was to evaluate calcium deposition in egg using eggshell flour as a limestone substitute in feed. Two hundreds laying hen of Isa Brown strain of 25 weeks were used in this study. Treatments were diet with 7.5% limestone as control (T0), 2.5% limestone is substituted with eggshell flour(T1), 5% limestone is substituted with eggshell flour (T2) and limestone is substituted with eggshell flour (T3). A completly randomized design were used to allocated the treatments with 5 replications of each. Each experimental unit consists of 10 laying hens. Parameters measured were egg weight, yolk weight, albumen weight, eggshell weight, calcium of egg (yolk, albumen and eggshell), length, weight and Ca of tibia bone. The results showed that substitution of limestone with eggshell flour had significantly effect (P<0.05) on eggshell weight, Ca deposition on yolk, albumen, and Ca of tibia bone but non significantly effect on egg weight, weight and percentage of yolk, weight and percentage of albumen, percentage and Ca of eggshell, length and weight of tibia bone. In conclusion, calcium deposition in yolk was the highest in the use of 7.5% eggshell flour to substitute limestone but obtained the lowest Ca of bone , while calcium deposition in albumen was the highest in the use of 2.5% eggshell flour.

The time course of calcium deposition in shells of the barnacle (Balanus amphititre amphititre) during cyprid-juvenile metamorphosis

1994 ◽  
Vol 52 ◽  
pp. 178-179
Author(s):  
Nancy R. Wallace ◽  
Craig C. Freudenrich ◽  
Karl Wilbur ◽  
Peter Ingram ◽  
Ann LeFurgey
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Time Course ◽  
Vertical Plane ◽  
Mantle Cavity ◽  
Qualitative Assessment ◽  
Calcium Deposition ◽  
Free Swimming ◽  
Freeze Dried ◽  
Scanning Electron

The morphology of balanomorph barnacles during metamorphosis from the cyprid larval stage to the juvenile has been examined by light microscopy and scanning electron microscopy (SEM). The free-swimming cyprid attaches to a substrate, rotates 90° in the vertical plane, molts, and assumes the adult shape. The resulting metamorph is clad in soft cuticle and has an adult-like appearance with a mantle cavity, thorax with cirri, and incipient shell plates. At some time during the development from cyprid to juvenile, the barnacle begins to mineralize its shell, but it is not known whether calcification occurs before, during, or after ecdysis. To examine this issue, electron probe x-ray microanalysis (EPXMA) was used to detect calcium in cyprids and juveniles at various times during metamorphosis.Laboratory-raised, free-swimming cyprid larvae were allowed to settle on plastic coverslips in culture dishes of seawater. The cyprids were observed with a dissecting microscope, cryopreserved in liquid nitrogen-cooled liquid propane at various times (0-24 h) during metamorphosis, freeze dried, rotary carbon-coated, and examined with scanning electron microscopy (SEM). EPXMA dot maps were obtained in parallel for qualitative assessment of calcium and other elements in the carapace, wall, and opercular plates.

Calcium Deposition Disease

2010 ◽  
Vol 5 (2) ◽  
pp. 15
Author(s):  
ANNE K. ROSENTHAL
Keyword(s):  
Calcium Deposition ◽  
Deposition Disease

Respiratory Ammonia Output and Blood Ammonia Concentration During Incremental Exercise

1999 ◽  
Vol 20 (02) ◽  
pp. 71-77
Author(s):  
W. Ament ◽  
J. Huizenga ◽  
E. Kort ◽  
T. Mark ◽  
R. Grevink ◽  
...  
Keyword(s):  
Ammonia Concentration ◽  
Incremental Exercise ◽  
Blood Ammonia

THE UPTAKE OF (6,7-3H) 17β-OESTRADIOL BY TISSUES OF THE DOMESTIC FOWL

1969 ◽  
Vol 60 (2) ◽  
pp. 199-209 ◽  
Author(s):  
R. A. Hawkins ◽  
P. J. Heald ◽  
Patricia Taylor
Keyword(s):  
Pituitary Gland ◽  
Intravenous Injection ◽  
Domestic Fowl ◽  
Physiological State ◽  
Laying Hen ◽  
Adult Bird

ABSTRACT A limited investigation of the distribution of radioactivity in the tissues of the adult laying hen has been made at differing times after intravenous injection of (6,7-3H) 17β-oestradiol. Uptake by all tissues examined was maximal between 2.0 and 4.0 minutes after injection. There was a marked retention of radioactivity by the oviduct and the liver. Of cerebral tissues examined the uptake of radioactivity was greatest in the pituitary gland. This uptake varied according to the physiological state of the bird. Calculations based on the rates of clearance of intravenous (6,7-3H) 17β-oestradiol indicate that in the adult bird the rate of secretion by the ovary is of the order of 1–2.0 mg oestradiol/24 h.

Specificity of the serum of laying hen.

1958 ◽  
Vol 29 (3) ◽  
pp. 135-143
Author(s):  
Tatsuo HOSODA
Keyword(s):  
Laying Hen

Litter Use in an Aviary Laying Hen Housing System

2012 ◽  
Author(s):  
Jessica D. Jenkins ◽  
Rebecca L. Parsons ◽  
Morgan Hayes ◽  
Hongwei Xin ◽  
Suzanne T. Millman
Keyword(s):  
Laying Hen ◽  
Housing System
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