Sunday, January 30, 2011

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The orangutan genome is identical to the human being in a Transfusion 97%

L techniques as of reprogramming used to transform cells body of pluripotent stem cells are being replaced by a new technology: the direct conversion some other cell types, without having to create a stem cell intermediary. Recently, scientists have directly transformed skin cells of mice in neurons (brain cells) and cells heart muscle. Now it is the turn to human cells. Canadian scientists published this finding in the journal Nature

. Researchers have isolated cells from adult human skin and they have introduced a gene reprogramming. Being in the presence of a special cocktail of growth factors, cells were transformed directly parents that give rise to all blood cells and white blood without passing through an intermediate state of stem cell. The proof is that the type of hemoglobin produced by these cells is as adult hemoglobin in the blood, stem cells, however, lead to a hemoglobin similar to that of the embryo, which is different from adults. This achievement brings the possibility of using direct reprogramming for healing, but scientists insist that there is still much to refine technology to reach clinical practice. Source:


http://www.unav.es/acienciacierta/stem/transfusion-de-piel.html

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skin: Achieve directly convert human skin cells into cells of the blood

cancer still remains a serious illness, you claims less than half of deaths related to smoking that occur each year. Smoking is a major cause of heart disease, aneurysms, bronchitis, emphysema and stroke. snuff consumption can damage the health of the female reproductive system and affect babies. In addition, the use of snuff is associated with reduced fertility and increased risk spontaneous abortion, premature delivery and stillbirth. It is also a reason why babies are underweight at birth. Similarly, smoking is associated with sudden infant death syndrome. smoke cigarettes (called secondhand smoke or environmental smoke snuff) may also have harmful effects to health of those who are exposed to it. Adults and children may have health problems from breathing secondhand smoke.


Saturday, January 29, 2011

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Other health problems caused by smoking


class has seen several documentaries about science and all of them have given us new knowledge. Last Friday saw a story on genetic inheritance. A story that answered many questions about ourselves and about our future children. If you want to see this story and many others enjoy visiting the program website: http://www.rtve.es/television/tres14/

Friday, January 28, 2011

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Tres14 Website.

A Researchers from the Universities of Cambridge and Edinburgh (UK) have created transgenic chickens for the first time unable to transmit avian influenza.
Sometimes, this disease to poultry and the virus spreads rapidly among animals. According to the authors of the research, transgenic chickens designed by them not only serve as protection for poultry in poultry farms, but could reduce the risk of new epidemics that could potentially spread to humans, as has happened on several occasions with the H5N1 strain in recent years.
Although the original strain of virus does not affect humans, is an agency in flux, and is the result of chance that one of these natural changes allow the transmission and human infection.
For this reason, the team led by Laurence Tiley, a specialist in molecular virology at the University of Cambridge, inserted into the genome of a group of chickens a strand of DNA that prevents disease from one animal to another. This genetic sequence transgenic birds makes manufacturing a small molecule with hairpin RNA that acts as a decoy for the virus. Briefly, it works by binding and inactivating key molecule for the cleavage and spread of virus (an enzyme called polymerase).
The virus is unable to pass from one individual to another regardless of whether it is a transgenic bird or a non-genetically modified. Although chickens infected with H5N1 are still dying with the same frequency as non-transgenic birds.


Some experts, such as the director of U.S. Public Health believes it is possible that the transgenic chicken is on world markets in a few years. But few experts think you need to demonstrate the safety of eggs and meat from these animals.

To view the full article:
http://www.elmundo.es/elmundo/2011/01/13/ciencia/1294944749.html