scholarly journals Effect of Chlorinated Hydrocarbons on Shell Gland Carbonic Anhydrase and Egg Shell Thickness in Japanese Quail

1975 ◽  
Vol 54 (1) ◽  
pp. 3-10 ◽  
Author(s):  
Eppie S. Chang ◽  
E.L.R. Stokstad
Keyword(s):  
Carbonic Anhydrase ◽  
Japanese Quail ◽  
Shell Thickness ◽  
Chlorinated Hydrocarbons ◽  
Shell Gland ◽  
Egg Shell

The influence of saline drinking water on the activity of carbonic anhydrase in the shell gland of laying hens

1989 ◽  
Vol 40 (5) ◽  
pp. 1111 ◽  
Author(s):  
I Yoselewitz ◽  
D Balnave
Keyword(s):  
Drinking Water ◽  
Carbonic Anhydrase ◽  
Laying Hens ◽  
Specific Activity ◽  
Carbonic Anhydrase Activity ◽  
Shell Gland ◽  
Shell Quality ◽  
The Poor ◽  
Egg Shell ◽  
Reduced Activity

Carbonic anhydrase activity was measured in three experiments using mucosal extracts from the shell gland of laying hens given drinking water consisting of town water with or without the addition of sodium chloride (2 g/l). Hens laying eggs with normal or defective shells on both treatments were used. The specific activity of carbonic anhydrase was significantly lower in hens receiving the saline drinking water, but egg shell type had no significant effect on enzyme activity. The results indicate that a reduced activity of carbonic anhydrase in the shell gland contributes to the poor egg shell quality observed in hens receiving saline drinking water.

Regulation of calbindin mRNA and calbindin turnover in intestine and shell gland of the chicken

1992 ◽  
Vol 262 (5) ◽  
pp. R800-R805 ◽  
Author(s):  
A. Bar ◽  
S. Striem ◽  
E. Vax ◽  
H. Talpaz ◽  
S. Hurwitz
Keyword(s):  
Carbonic Anhydrase ◽  
Sexual Maturation ◽  
Carbonic Anhydrase Inhibitor ◽  
Temporal Association ◽  
Shell Gland ◽  
Half Time ◽  
Synthetic Oligonucleotide ◽  
Egg Shell

A synthetic oligonucleotide was used as a probe for measurement of calbindin mRNA in the shell gland and intestine of chickens. The half time of calbindin mRNA in the duodenum and shell gland was estimated at 2 and 3.6 h and that of calbindin at 13.9 and 32.6 h, respectively. The formation rates of calbindin mRNA were 0.37 and 0.17 pmol.h-1.g-1 and the rate of calbindin formation was 0.099 and 0.031 microgram.pmol mRNA-1.h-1 in the duodenum and shell gland, respectively. In the shell gland, calbindin mRNA and calbindin appeared at the time of sexual maturation during calcification of the first egg shell. Calbindin mRNA fluctuated markedly during the daily egg cycle, in close temporal association with egg shell calcification. When Ca2+ deposition was eliminated by expulsion of the ovum, the rise in calbindin mRNA was prevented. An indirect suppression of Ca2+ deposition by administration of the carbonic anhydrase inhibitor acetazolamide also resulted in a decrease in calbindin mRNA. The results are consistent with a possible role of Ca2+ flux in the regulation of calbindin mRNA appearance in the shell gland of chickens.

scholarly journals PENAMBAHAN RIMPANG KUNYIT (CURCUMA DOMESTICA VAL.), TEMULAWAK (CURCUMA XANTHORRHIZA ROXB.), DAN TEMU PUTIH (CURCUMA ZEDOARIA ROSC.) DALAM RANSUM KOMERSIL TERHADAP KUALITAS TELUR BURUNG PUYUH (Coturnix-coturnix japonica)

ZOOTEC ◽  
2014 ◽  
Vol 34 (1) ◽  
pp. 103 ◽  
Author(s):  
Claudia Rondonuwu ◽  
J L.P Saerang ◽  
F J Nangoy ◽  
S Laatung
Keyword(s):  
Shell Thickness ◽  
Control Diet ◽  
Coturnix Japonica ◽  
Coturnix Coturnix Japonica ◽  
Curcuma Zedoaria ◽  
Egg Weight ◽  
Coturnix Coturnix ◽  
Curcuma Xanthorrhiza ◽  
Egg Shell

ABSTRACTADDITION TURMERIC GINGER, RHIZOME AND WHITE RHIZOME OF COMMERCIAL RATION TO EGGS’ QUALITY OF QUAILS.This study aims to determine the quality of quail eggs after added 2% turmeric (Curcuma domestica Val.), ginger (Curcuma xanthorrhiza Roxb.), and ginger and white (Curcuma zedoaria Rosc.) in the commercial ration. Animals used are of the type Coturnix-coturnix japonica quail females aged 6 weeks a total of 120 birds. Research using completely randomized design (CRD) with 4 treatments and 5 replications, and each replication consisted of 6 tail quail. Treatment is given as follows: R0 = control diet; R1= ration with 2% turmeric (Curcuma domestica Val.), R2 = 2% ration with ginger (Curcuma xanthorrhiza Roxb.), R3 = 2% ration with ginger and white (Curcuma zedoaria Rosc.). results of the study showed that the addition of 2% turmeric (Curcuma domestica Val.), ginger (Curcuma xanthorrhiza Roxb.), ginger and white (Curcuma zedoaria Rosc.) and not significantly different effect on egg weight, yolk color and egg shell thickness. And based on the results of this study concluded that the addition of 2% turmeric, ginger, ginger and white and can not increase egg weight, yolkcolor and egg shell thickness when added to a commercial ration.Keyword : Ration, Turmeric, Ginger, Ginger and White, Quail Eggs.

scholarly journals PENGARUH PROBIOTIK DAN EKSTRAK DAUN KATUK (Sauropus androgynous) TERHADAP TEBAL KERABANG DAN HAUGH UNIT (HU) PUYUH PETELUR (Effect Of Probiotic and Sauropus androgynous Leaf Extract on Eggshell Thickness and Haugh Unit (HU) in Laying Quail)

2020 ◽  
Vol 4 (1) ◽  
Author(s):  
Novia Rahayu ◽  
Dwi Wijayanti ◽  
Nurul Frasiska
Keyword(s):  
Shell Thickness ◽  
Leaf Extract ◽  
Egg Quality ◽  
Quality Standards ◽  
Bacillus Sp ◽  
Eggshell Thickness ◽  
Treatment Groups ◽  
Probiotic Treatment ◽  
Egg Shell ◽  
Haugh Unit

Abstrak Penelitian bertujuan untuk mengetahui pengaruh pemberian ekstrak daun katuk (Sauropus androgynous) dalam ransum terhadap tebal kerabang dan haugh unit (HU). Enam puluh ekor puyuh petelur fase produksi dibagi menjadi 4 kelompok perlakuan : 1) T0 : ransum tanpa perlakuan, 2) T1 : ransum dengan perlakuan ekstrak daun katuk 3.5g/kg ransum, 3) T2 : ransum dengan perlakuan probiotik (Bacillus sp. dan Saccharomycess sp.), 4) T3 : ransum dengan perlakuan ekstrak daun katuk 3.5g/kg ransum + probiotik (Bacillus sp. dan Saccharomycess sp.). Hasil penelitian menunjukkan bahwa perlakuan tidak berpengaruh nyata terhadap tebal kerabang (P>0.05) dan haugh unit (HU) (P>0.05). Telur hasil penelitian dari semua perlakuan menunjukkan kondisi telur yang sesuai dengan standar kualitas tebal kerabang dan haugh unit (HU). ¬Kata Kunci : Ekstrak daun katuk, haugh unit, probiotik, puyuh, tebal kerabang Abstract The study aims to determine the effect of giving sauropus androgynous leaf extract in the ration on egg quality. Sixty quails laying in the production phase were divided into 4 treatment groups: 1) T0: rations without treatment, 2) T1 : rations with katuk leaf extract treatment 3.5g / kg ration, 3) T2 : rations with probiotic treatment (Bacillus sp. And Saccharomycess sp.), 4) T3 : ration with katuk leaf extract treatment 3.5g / kg ration + probiotics (Bacillus sp. and Saccharomycess sp.). The results showed that the treatment had no significant effect on egg shell thickness (P>0.05) and haugh unit (HU) (P>0.05). Eggs from all treatments showed the condition of eggs in accordance with the quality standards of the thickness of the shells and haugh units (HU). Keywords: Eggshell thickness, haugh unit, probiotics, quail, sauropus androgynous leaf extract

Radiographic Studies on the Formation of the Hen'S Egg Shell

1951 ◽  
Vol 28 (2) ◽  
pp. 125-140
Author(s):  
J. R. G. BRADFIELD
Keyword(s):  
Calcium Carbonate ◽  
Mineral Matter ◽  
Carbonate Content ◽  
Shell Gland ◽  
X Rays ◽  
Characteristic Structure ◽  
Hen’S Egg ◽  
Shell Deposition ◽  
Egg Shell ◽  
Pointed End

1. Radiographic methods have been used to study the rate of deposition of the hen's egg shell and the changes in volume and orientation undergone by the egg in the shell gland. 2. Shell deposition commences about 5 hr. after the yolk is ovulated and several series of radiographs were obtained tracing the process from these earliest stages through to the fully calcined shell. 3. From radiographs of calcium carbonate-gelatin mixtures it was found that, for a series of comparable objects differing only in calcium carbonate content, the densitometer readings on their radiographs were directly proportional to the density of calcium carbonate traversed by the X-rays in each object. 4. Hence, densitometer measurements on the periphery of the shell in each of a series of radiographs taken during the development of a single egg shell give values which are proportional to the density (or thickness) of calcium carbonate traversed by the tangential rays. It is shown that the radial thickness is closely proportional to the square of these values. 5. Plotting these squared densitometer readings against time indicates that the rate of deposition of mineral matter in the shell follows an S-shaped curve, with a marked acceleration in shell deposition 5-6 hr. after its onset. 6. During its first few hours in the shell gland, the egg undergoes a 25% osmotic increase in volume. This swelling is brought to a fairly abrupt halt by the increase in the rate of shell deposition and the consequent increase in the impermeability and rigidity of the shell. 7. Throughout all but the last hour or two of its 20 hr. stay in the shell gland, the egg lies with its pointed end caudal. Shortly before it is laid, however, it usually undergoes a 180° rotation in a horizontal plane. Thus the blunt end finally becomes caudal and emerges first when the egg is laid. During the rotation, the egg sinks to a more ventral position. This is necessary because, in most hens, the length of the egg plus the thickness of the walls of the shell gland is greater than the width of the pelvis. 8. The possible significance of the S-shaped curve of shell deposition is discussed. The volume, shape and orientation of the egg are considered in relation to the needs of the chick embryo and to the characteristic structure of the bird's oviduct and pelvis.

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