Sunday, 20th April 2014

Cell culture technology

Posted on 06. Jul, 2009 by in Agriculture & Botany, Environment & Ecology, News

The growing of cells outside of living organisms. With mammalian cell culture, we can replace animal testing with cell testing when evaluating the safety and efficacy of medicines. Plant cell culture provides an environmentally sound and economically feasible option for obtaining naturally occurring products with therapeutic value, such as the chemotherapeutic agent paclitaxel, a compound found in yew trees and marketed under the name Taxol®.

The Arctic methane emissions

Posted on 06. Jul, 2009 by in Environment & Ecology, News

15The annual freezing tundra of the Arctic many releases each fall of large quantities of methane. This is shown by a study conducted jointly by the National Center for Environmental Research, University of Aarhus and the universities of Copenhagen and Lund (Sweden), recently published in the journal Nature.

In wetlands, the bacterial decomposition of organic materials annually generates considerable quantities of methane gas with high greenhouse effect. This phenomenon is directly related to soil temperature and is therefore in high latitudes, concentrated in the summer months. But for several decades, scientists are looking with puzzlement increased fall rate of methane in the atmosphere of the Arctic regions. Emissions from organic decomposition disappearing at the approach of winter, this increase remained unexplained long. (more…)

Nanomaterials for more robust tools

Posted on 06. Jul, 2009 by in Agriculture & Botany, News, Zoology

22Researchers from the Institute of Materials Science, University of Valencia have created stronger materials to improve certain machines whose tunneling . They worked in collaboration with groups at the University Jaume I and the Polytechnic University of Valencia in order to patent a new method of preparing carbide metal to improve the structure of machines, tools or equipment to drill tunnels. (more…)

G4 research on stem cells

Posted on 06. Jul, 2009 by in Life, News

33The international excellence in research and cell therapies for diseases such as diabetes or Parkinson’s will be created. That was the idea launched by the Institute for Regenerative Medicine in California , the Consortium on stem cells in Canada, the Medical Research Council of the United Kingdom, and the Ministry of Science and Innovation Spanish, who have all agreed on the creation of these groups.

These international teams of excellence will lead research into therapies against specific diseases such as Parkinson’s, or those related to diabetes. The initiative involving Spain, Canada, the United Kingdom, the United States is known as the “Disease Teams” considered by experts as the G4 of research on stem cells. The agreement follows a memorandum of understanding between the Minister for Science and Innovation Cristina Garmendia and the President of the Institute for Regenerative Medicine California (CIRM, its acronym in English). (more…)

Discovery of the first brain fossil

Posted on 05. Jul, 2009 by in Health & Medicine, Life

Team Museum national the history naturae the Paris, the European Synchrotron Radiation Facility (ESRF), the CNRS and the American Museum of National History in New York brought to light by chance, a brain fossil older than 300 million years. It belongs to a fish of the family of sharks and rays. This discovery was made by the technique of synchrotron holotomographie the results are published this week in the journal PNAS. 

  

 

 

The structure of the skull (foreground) of a 300 million year-old iniopterygian fish from Kansas remotely related to living ratfish is elucidated thanks to holotomography, a technique based on synchrotron X-ray phase contrast imaging, and yields the first hint at an exceptional mineralization of the brain (orange).
Credits: PNAS/Philippe Janvier (CNRS, Museum National d’Histoire Naturelle).

Scientists working on the skull of a fossil fish from iniopterygien rocks of Kansas. Absorption by microtomographie revealed a greater density of the skull, the researchers then proceeded to the technique of X-ray holotomographie The results showed the presence of an elongated and symmetrical identical to that of a brain. The 3D reconstruction revealed the different parts of the (more…)

Centimorgan (cM)

Posted on 05. Jul, 2009 by in Agriculture & Botany, Glossary, Zoology

A unit of measure of recombination frequency. One centimorgan is equal to a 1% chance that a marker at one genetic locus will be separated from a marker at a second locus due to crossing over in a single generation. In human beings, 1 centimorgan is equivalent, on average, to 1 million base pairs.

Centromere

Posted on 05. Jul, 2009 by in Agriculture & Botany, Glossary, Zoology

A specialized chromosome region to which spindle fibers attach during cell division.

The construction of biological tissue by magnetic manipulation

Posted on 04. Jul, 2009 by in Experiments & Research, Life

02A team of U.S. researchers has created a system based nanoparticles to align human cells in the form of linear chains in response to a magnetic field. Chains of cells could be used in the creation of human tissues and organs. This search for “Case Western Reserve University“, the “Duke University” and “University of Massachusetts Amherst,” will be published in May in the journal “Nanoletters“.

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CEPH pedigree

Posted on 04. Jul, 2009 by in Agriculture & Botany, News, Zoology

Pedigrees collected by the Centre of Etude of Polymorphism Humain that are appropriate for reference genetic mapping. These pedigrees are characterized by the availability of a large number of offspring (average 8.5) and both sets of paternal and maternal grandparents. The structure of these pedigrees renders them “linkage phase known.”

A new sweetener aspartame could replace

Posted on 04. Jul, 2009 by in News, Zoology

34Ajinomoto food group has submitted to the FDA on April 8 a record approval for authorizing the marketing of a new sweetener from the same amino acids as aspartame. Based in Japan, where it is a major player in the food, the Ajinomoto Group is the world’s largest producer of amino acids by fermentation to the pharmaceutical, food and feed. With its 900 scientists and 11 laboratories and research centers, the Ajinomoto group spends a significant amount of activity in research and development.

This new sweetener called Advantage is a derivative of aspartame, it has a composition close, it is a dipeptide of L-aspartic acid and L-phenylalanine in the form of methyl ester, and has as aspartame a sweetening power approximately 200 times higher than that of sucrose. However, this new sweetener has a taste closer to sucrose and is much more intense than aspartame which means it will be used in lower amounts in the formulations, and it is stable to heat treatment, which makes its use more flexible than aspartame.

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