Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Radioactive Labelling
Radioactive labelling method has been effectively applied on the chick blastoderm. The method includes labelling one embryo (donor) and grafting a part of it in similar position on another unlabelled embryo of similar stage (Host). An explanted blastodermis immersed in a medium consisting of the radioactive mtiated (H3) thymidine. In 3 to eight hours the tritiated thymidine is incorporated into the chromosomal DNA of dividing blastodermal cells. The embryo labelled in such type of a way by tritiated thymidine serves as a donor. Another embryo at similar stage of development as attained through the labelled donor in the meantime is then chosen to serve as the host. A small area of the host embryo is excised and replaced by a corresponding piece from the donor of which the fate is to be determined. Healing generally takes place quickly and the development is not impaired if the operation has been done carefully.
The thymidine does not pass out of the nuclei of the labelled cells but stays in the chromosomes of their descendents. Even though the radioactive thymidine present in the DNA is gradually diluted with each subsequent chromosomal replication radioactivity remains for a considerable time. Such type of composite embryo (partly from donor and partly from the host) is tested at a later stage of development for radioactivity through special techniques like autoradiography etc. Only the part(s) or structure(s) developed from the grafted piece display the presence of radioactivity thus establishing the fate of specific area taken from the donor.
Radiographic Evaluation An intraoral periapical radiograph with a paralleling technique should be made and observed to ensure absence of pathology in the peri-implant region an
What is risk factor interaction ? Coronary artery disease, as has been explained, is a multifactorial disease with diverse risk factors coming together and interacting to produ
explain spermatogenesis
SPERM A T OGENESIS The process of maturation of reproductive cells in the testes of male to form spermatozoa (sperm) is known as spermatogenesis. The testes are formed
Define Nutrient Requirements during Emergencies? The nutritional requirements of the people do change during conditions of unforeseen stress and/or any calamity. Certain recomm
Explain the Sub-clinical Protein Energy Malnutrition? You have already learnt that clinical forms of PEM represent only a small proportion of the total cases of PEM in a commun
Cells are classified into eukaryotic or prokaryotic. Prokaryotic cell is that with no a delimited nucleus. Eukaryotic cells are those with nucleus delimited by membrane.
Non living vs. Living matter As is clear from above account the energy of matter resides in its chemical organization. The total potential chemical energy, entrapped as b
Calvin cycle (the aka Calvin-Benson Cycle or the Carbon Fixation) is the series of biochemical, enzyme-mediated reactions during which the atmospheric carbon dioxide is reduced an
Define the term Underweight? Just as overweight is the result of a positive energy balance irrespective of the etiology, underweight results when the energy balance is negative
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd