ScienceDaily: Biotechnology News |
- New imaging method sheds light on cell growth
- Protein-making machinery in bacteria successfully re-engineered
- Discovery explains why influenza B virus exclusively infects humans: Opens door for new drugs
- New sensors streamline detection of estrogenic compounds
- Darwin's butterflies? Spectacular species radiation in the Caribbean studied with 'DNA barcoding'
- 'Hidden' differences of chromosome organization become visible
- Making tomorrow's bioenergy yeasts strong
- Researchers produce viable bacterium in which one of four DNA bases is replaced by synthetic analog
- Simple way to grow muscle tissue with real muscle structure
| New imaging method sheds light on cell growth Posted: 25 Aug 2011 02:25 PM PDT Researchers developed a new imaging method that can measure cell mass using two beams of light, offering new insight into the much-debated problem of whether cells grow at a constant rate or exponentially. They found that mammalian cells show clear exponential growth only during the G2 phase of the cell cycle. This information has great implications not only for basic biology, but also for diagnostics, drug development and tissue engineering.  |
| Protein-making machinery in bacteria successfully re-engineered Posted: 25 Aug 2011 11:16 AM PDT Researchers have successfully re-engineered the protein-making machinery in bacteria, a technical tour de force that promises to revolutionize the study and treatment of a variety of diseases.  |
| Discovery explains why influenza B virus exclusively infects humans: Opens door for new drugs Posted: 25 Aug 2011 10:51 AM PDT Researchers have reported a discovery that could help scientists develop drugs to fight seasonal influenza epidemics caused by the common influenza B strain. Their discovery also helps explain how influenza B is limited to humans, and why it cannot be as virulent as A strains that incorporate new genes from influenza viruses that infect other species.  |
| New sensors streamline detection of estrogenic compounds Posted: 25 Aug 2011 10:51 AM PDT Researchers have engineered new sensors that fluoresce in the presence of compounds that interact with estrogen receptors in human cells. The sensors detect natural or human-made substances that alter estrogenic signaling in the body.  |
| Darwin's butterflies? Spectacular species radiation in the Caribbean studied with 'DNA barcoding' Posted: 25 Aug 2011 07:22 AM PDT In one of the first taxonomic revisions of Neotropical butterflies that utilizes "DNA barcoding," biologists have uncovered a spectacular degree of evolutionary divergence within the satyrine butterfly genus Calisto.  |
| 'Hidden' differences of chromosome organization become visible Posted: 25 Aug 2011 07:22 AM PDT Why do different species have dissimilar sets of chromosomes? Why do the differentiated species often conserve apparently identical chromosome complements? Furthermore, why, while chromosome rearrangements can considerably change the course of species evolution, do certain variation among individuals and populations of some species persists indefinitely? Such questions motivate researchers to compare chromosomes in closely related species. To understand the nature of chromosome changes in the voles Microtus savii, researchers launched a molecular cytogenetic study.  |
| Making tomorrow's bioenergy yeasts strong Posted: 25 Aug 2011 06:19 AM PDT Cornstalks, wheat straw, and other rough, fibrous, harvest-time leftovers may soon be less expensive to convert into cellulosic ethanol, thanks to scientists' studies of a promising new biorefinery yeast.  |
| Researchers produce viable bacterium in which one of four DNA bases is replaced by synthetic analog Posted: 25 Aug 2011 06:02 AM PDT An international team of researchers has achieved a world-first by producing a viable bacterium in which one of the four DNA bases has been replaced by a synthetic analog compound. The advantage of the new bacterium is that it would eventually be dependent on this compound, which does not exist in nature, and would therefore be unable to compete or exchange genetic material with natural organisms.  |
| Simple way to grow muscle tissue with real muscle structure Posted: 19 Aug 2011 05:09 AM PDT Researchers have found a simple way to grow muscle tissue with a real muscle structure in the laboratory. They found that the muscle cells automatically align themselves if they are subjected to tension in one direction -- this is essential for the ability of the muscle cells to exert a force.  |
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