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Register a new userThe effect of tetracycline on chickens embryos development
تأثير التتراسيكلين على تطور أجنة الدجاج
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Aِl-Baath University ورقة بحثية
Publication date
2015
fields
Life Science
and research's language is
العربية
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Shamra Editor
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اجريت التجربة على 160 بيضة مخصبة معقمة وزعت في 4 مجموعات بمعدل 40 بيضة في كل منها, حضن البيض في الحاضنة حتى مرحلة الخط المتوسط الابتدائي مدة 12 ساعة ثم أخرج و حقن بيض المجموعات التجريبية (1-2-3) بمحلول التتراسيكلين تحت القرص الجرثومي.
Experiment was conducted on 160 fertilized egg sterile, distributed in four groups of 40 eggs in each of them, eggs incubation in the hatchery for 12 h, and then go out and inject eggs experimental Groups (1-2-3) with a solution of tetracycline under the embryo disk.
References used
Allen ES, Brown WE. 1966; Hepatic toxicity of tetracycline in pregnancy. Am J ObstetGynecol 95:128
Alumni Bulletin 1961. university of Michigan official publication. Vol.66.no33 p.31
Bevelander, G., Nakahara, H. & Rolle, G. K. (1962). The effect of tetracycline on development of skeletal system of the chick embryo. Develop. Biol., 2, 298-312
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Two experiments were conducted to evaluate the effect of ascorbic acid
(AA) during egg incubation on development of broiler chickens of a
commercial stock. In Experiment ١, eggs with living embryos were injected at
١٥ d of incubation with ٠٫١ ml o
f saline solution containing either ٣ or ١٢ mg of
AA per egg and uninjected control. Body weights of each treatment were
determined weekly from hatch to ٦ wk of age. In Experiment ٢, the treatments
at ١٥ d of incubation were as follows: ١) eggs injected with ٣ mg of AA and
then cooled at ٢٢° C for ٢٤ h; ٢) eggs dipped in ٣٪ solution of AA for ٣ min
and then cooled at ٢٢° C for ٢٤ h; and ٣) control. Embryo weight at ١٩ d of
incubation, hatchability and body weights of the hatched chicks were
determined.
Thirteen viable and post - frozenthawed Shami cows embryos obtained by
super-ovulation and artificial insemination technique in order to determine sex
of embryos. Biopsies (1-2 cells) of embryos at morula or blastocyst stage were
taken using micro
manipulation under inverted microscope.
It was concluded that aspiration
of 1-2 blastomere (s) from embryos at morula or blastocyst stage was enough to
determine sex of embryo using PCR and it is recommended that using this
technique can be a useful tool in splitting and transferring of desired sex
embryos in genetic improvement program.
Mice embryos were irradiated in utero by gamma rays (٠،٢،٤،٦ Gy) at
١٠،١٢،١٤،١٦،١٨ days of gestation. Histological study was carried out on the
first premandibular molar after ٢،٤،٦،٨ days of irradiation, to investigate the
effect of irradiation on different stages of molar development.
Carnation is one of the most important crop for cut flowers not only in
Syria but all over the world.
The producers in Syria and in other countries are suffering during the
seasons of hot temperature from dwarfing of the plants and the production
of
small flowers.
The work conducted here was to investigate the effect of high temperature
on flower development and morphology.
Pephigus vulgaris is a recurrent life threatening disease. Its basic treatment is
systemic steroids, after treating the first attack of the disease by systemic steroids we start to reduce the
dose of the steroids gradually. During this reduction th
e desease may flare up, this recurrence is routinely
treated by increasing the dose of the steroids again to control the disease, this study was made to compare
the benefits of tetracycline in controlling the recurrence of pemphigus vulgaris with the routinely used
way which is elevating the dose of prednisolone.
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