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Register a new userThe conditions of extracting collagen from skins of sheep, cows, and chickens and compare them
شروط استخلاص الكولاجين من جلود كل من الأبقار و الأغنام و الدجاج و المقارنة بينها
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في البحث المقدم، حددتِ الشروط الأكثر ملاءمة لاستخلاص الكولاجين بالطريقة الحمضية من مخلفات جلود كل من الأغنام و الأبقار و الدجاج، و قد بينت التجارب باستخدام الحموض العضوية المختلفة أن حمض الخل بتركيز 0.5 M و بحجم 6 مل من الحمض لكل 1غ من الجلد، هو الأفضل لاستخلاص الكولاجين من هذه الجلود خلال 48 ساعة.
The aim of this research is the determination of the appropriate conditions for extracting collagen by acidic method from remnants of skins of sheep, cows, and chickens. The results showed that acetic acid is the best among the various organic acids, for extracting collagen of these skins during 48 hours, at concentration of 0.5 M and the ratio, acidic: skin (6:1).
References used
Potaros, T., Raksakulthai, N., Runglerdkreangkrai, J., Worawattanamateekul, W. 2009. Characteristics of Collagen from Nile Tilapia (Oreochromis niloticus) Skin Isolated by Two Different Methods, Kasetsart J, 43, 584 – 593
Wang, L., Yang, B., Du, X., Yang, Y., Liu, J. 2008. Optimization of conditions for extraction of acid-soluble collagen from grass carp (Ctenopharyngodon idella) by response surface methodology, Innovative Food Science and Emerging Technologies, 9,604-607
Yan, M., Li, B., Zhao, X., Ren, G., Zhuang, Y., Hou, H., Zhang, X., Chen, L., Fan, Y. 2008. Characterization of acid-soluble collagen from the skin of walleye Pollock (Theragra chalcogramma), Food Chemistry, 107,1581-1586
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This research aimed to determine the economic scales of production and
different product values, and the difference between the true sizes and its
parallel economic areas in the midregion of Jordan. The econometrics analysis
was used for the cost
functions of sheep, goats, and cows production in
midregion of Jordan. The data were analyzed by linear regression using
suitable economic models.
Total production functions of sheep were determined, and the average
productivity was derived to determine the economic scales in order to minimize
the average productivity cost of sheep, goats and cows. For the sheep, the
product value was about JD 16649.59 for 419 sheep, with average cost of one
JD is 0.522 JD. Marginal cost function was derived from the total production
cost function, with the equality marginal cost function to parallel price in order
to reach the scale of maximize profit. The production value was 18251.49 JD
for 460 sheep and average JD cost of 0.56. The present productivity scale was
157sheep which was 262 sheep lower than the productivity scales for economic
efficiency and 303 sheep lower than that for maximize profit.
الكفاءة الاقتصادية
cost function
Regression
الانحدار الخطي
دالة التكاليف الكلية
دالة التكاليف المتوسطة
دالة التكاليف الحدية
السعة الإنتاجية
تعظيم الربحية
منحنى التكاليف الكلية
منحنى التكاليف المتوسطة
منحنى التكاليف الحدية
التحليل الاقتصادي القياسي
Marginal cost
Productivity cost
Maximize profit
Curve cost
Analysis of econometrics
المناطق المطرية
المزيد..
This study aimed to provide an assessment of some anatomical
characteristics of the formal comparison to the kidneys of dogs
and sheep by studying of macroscopic anatomical differences and
morphometric measurement between the studied kidneys . (20
)
Kidneys were taken randomly during the slaughter of ten heads of
sheep in the local slaughterhouses, regardless of gender and age ,
Animals were clinically free of diseases and (20) kidneys were
taken from ten local stray dogs and regardless of gender and age ,
Animals were clinically free of diseases . the study showed the
presence of Morvomitrih differences in kidney (length – width -
thickness - weight) and some anatomical variations (renal pelvis -
renal Columns )between the kidneys of sheep and dogs. The study
pointed out there are many similarities between the kidneys of
sheep and dogs whereas revealed the length of the dogs kidneys.
This study was conducted on domestic pigeons and back yard
chickens populations in many regions of Syrian Arab Republic
using techniques of isolation on chicken embryo and cell culture.
The birds were suspected to be infected by pox virus through
clinical symptoms by the presence of lesions in warts and scars
on Different areas of the face as the comb, wattle, the corner of
the mouth and eyelids and other areas of body and we notice
presence of Diphtheric lesions on the mucous membrane of the
oral cavity in many cases.
The dissolution rate of Iron and Titanium from Syrian basalt rock was
studied by hydrochloric acid, sulfuric acid, mixture of hydrochloric acid
methanol, sulfuric acid methanol solutions. The effects of temperature, time of
digesting and concentra
tions of acids have been investigated, the ratios of solid
to liquid and stirring speed were constant (S/L=0.02). It has been clear that
when the mixture of hydrochloric acid and methanol (100:50(V:V)
HCL:CH3OH) was used, the best dissolution for both iron and titanium was
obtained when we digested the rock and it took 6h at 100 ˚C where as the
concentration of hydrochloric acid and methanol were [HCl]=11M, [CH3OH]
=0.92M, the resulting ratios of dissolution of iron and titanium in the
mentioned conditions were 75.53%, 63.19 % respectively.
This study aimed to achieve the quantitive estimation of costs,
returns, efficiency and income economic indicators of sheep
breeding.
Tow sources of data were used ,Questionnaire of random sample
of breeders included (374 case) in the study area
as primary data
and MOAAR(annual agriculture statistical ), Database of NAPC,
as secondary data.
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