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Tag: "origin" at biology news

Stem cells grown in lab mirror normal developmental steps

...l, between 33 - 25 million years ago, prompted the origin of economically important land plants that are sensitive to atmospheric carbon dioxide levels, such as corn and sugarcane. "The onset and stabilization of ice sheets at the same time as a decline in carbon dioxide illustrates the importance of atmos...

International Team Determines Geographic Origin of Leprosy

...chniques, these researchers uncovered clues to the origin of a disease that, since ancient times, has been o...tely eliminated. Reference: M Monet et al. On the origin of leprosy. Science 308 (2005) DOI: 10.1126/science.1109759. ...

Researchers seek to discover what really happens when a virus enters the body

... host are interacting over time, from the point of origin to the point of infection," Bell says. Ultimately, the interdisciplinary team hopes their efforts will provide a quantitative method that derives a characteristic profile or fingerprint from the IIS of any host-virus system. If their method can ach...

Scientists track stealth DNA elements in primate evolution

...ve been thoroughly characterized in terms of their origin and sequence composition. What has remained elusiv...genomes tested, which dates the AluYb linage to an origin approximately 18-25 million years ago. Their results also indicated that the AluYb subfamily underwe...

Multi-species genome comparison sheds new light on evolutionary processes, cancer mutations

...ionary processes can lead to new insights into the origin of human diseases," said Dr. Lewin, who is director of the Institute of Genomic Biology at the University of Illinois. ...

Scientists discover stem cell origin of neck and shoulders

...uly) will outline for the first time the stem cell origin of the structure of the neck and shoulders in vert... and windows. If cells are from the same stem cell origin they 'stick together' throughout their life ?normally without us noticing it." As the joining point...

Stem Cells Found In Cerebellum; Possible Cell of Origin for Childhood Brain Tumors

...f stem cells in the cerebellum suggests a possible origin for these normal cells and provides a starting poi...astomas arise in the cerebellum but their cells of origin have remained unclear. However, a number of these tumors have been shown to contain proteins that ar...

Cultural norms not unique to human societies

...ary progression. "These results suggest an ancient origin for the cultural conformism that is so evident in humans," said de Waal. "Further research may reveal these findings to be more widespread throughout the animal kingdom." ...

Insight into our sight: A new view on the evolution of the eye lens

...oached this question by examining the evolutionary origin of one crystallin protein family, known as the ?-crystallins. Focusing on sea squirts, invertebrate cousins of the vertebrate lineage, the researchers found that these creatures possess a single crystallin gene, which is expressed in its primitive li...

Once given 'no respect,' cells' tiny RNAS take driver's seat

...dant than normal -- identify the tumors' tissue of origin much better than other tests. The other paper shows that over-expression of chromosome 13's microRNAs dramatically increases the risk of cancer in mice predisposed to cancer because of a faulty Myc gene. "We've found that there's complex crosstalk b...

From a Few Wild Ancestors, a Citrus Cornucopia

...lped the researchers identify specimens of unknown origin and differentiate between closely related species....ssions, about 400 of unknown, but probable, sexual origin were studied. The others were either known to be crosses from breeding programs or mutations from a ...

Evolution of life on Earth may hold key to finding life in outer space

...erial," Fox said. "This suggests life had a single origin from an earlier 'prebiotic' world, and research in NASA's Exobiology Program seeks to understand how this happened. The results of this type of research also help guide the search for life elsewhere in the universe, which is an important NASA objecti...

Life's origins were easier than was thought

...portant obstacle to the theory of ribozymes as the origin of life: they could not be very large in length as they would not be able to correct the replication errors (mutations). Therefore they were unable to contain enough genes even to develop the most simple organisms. An investigation led by Mauro Sant...

Study charts origins of fear

...orebrain that regulates emotion and memory, as the origin of fear memory. "This is critical as it changes how and where scientists thought fear was developed," says Zhuo, the EJLB-CIHR Michael Smith Chair in Neurosciences and Mental Health. "By understanding the biomolecular mechanisms behind fear, we cou...

Plants discriminate between self and non self

... ecology on examining how the latitude of a plants origin affects the respiratory responses of plant roots and mycorrhizal fungi to soil temperatures. ...

Prozac for future Plants on Mars

... ecology on examining how the latitude of a plants origin affects the respiratory responses of plant roots and mycorrhizal fungi to soil temperatures. ...

The making of a fat cell

...new study reveals critical molecular events in the origin of fat cells. The findings are central to understanding chronic diseases, such as obesity and diabetes, as fat cells produce hormones critical for metabolic control, the researchers said. The study finds that a hormonal cocktail routinely used in th...

System Drastically Cuts Down Botulism Detection Time

...new study reveals critical molecular events in the origin of fat cells. The findings are central to understanding chronic diseases, such as obesity and diabetes, as fat cells produce hormones critical for metabolic control, the researchers said. The study finds that a hormonal cocktail routinely used in th...

Short-term Bio Sensors Monitor From Afar

...new study reveals critical molecular events in the origin of fat cells. The findings are central to understanding chronic diseases, such as obesity and diabetes, as fat cells produce hormones critical for metabolic control, the researchers said. The study finds that a hormonal cocktail routinely used in th...

Key To Stem Cell Transplant Success Is Tricking Immune System

...new study reveals critical molecular events in the origin of fat cells. The findings are central to understanding chronic diseases, such as obesity and diabetes, as fat cells produce hormones critical for metabolic control, the researchers said. The study finds that a hormonal cocktail routinely used in th...

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