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Tag: "length" at biology news

Chemical Engineer Kao Explores Antibiotic Synthesis With DNA Chips

... the antibiotic tylosin. Instead of increasing the length of time that a bacterium produces the antibiotic--the case with erythromycin--these two genes allow the bacterium to produce it faster. Again, the specific mutations eluded Kao's group. Currently, the researchers are trying to identify the mutations...

Stealth Worms May Improve Insect Pest Control

...rth. They range in size from less than a micron in length to as much as 26 feet. Worldwide interest has begun to focus on microscopic nematodes that live with symbiotic bacteria. "We study these nematodes -- which are actually insect killers -- not only to understand how diverse they are, but also to use th...

A New Species of Monkey is Discovered in Tanzania: The First in Africa for More Than 20 Years

...w arboreal mangabey is brown, with a head and body length of about 3 ft (90 cm). It is characterized by a long, erect crest of hair on its head, elongated cheek whiskers, an off-white belly and tail, and an unusual call, termed a 'honk-bark' by the authors. The monkeys occur as high as 8,000 ft (2450 m) w...

Supercomputers to focus brains on AIDS dilemma

...ynamics, where events take place in nanoseconds at length scales far shorter than the wavelength of light. By putting the molecules into motion in their simulations, the researchers discovered that there is a great deal of unexpected flexibility in this binding region, indicating that instead of only one th...

Biochemists report discovery of structure of major piece of telomerase; implications for cancer

...uilds the telomeres, cancer cells can maintain the length of their telomeres indefinitely. Although it is not known whether telomerase activation is just a marker for cancer cells or involved in causing it, telomerase is an attractive target for development of anti-cancer drugs by pharmaceutical companies. ...

Cooperation is key—a new way of looking at MicroRNA and how it controls gene expression

...uld be expected to bind to a piece of RNA of equal length and complementary sequence. And since these sequences of the microRNA were known, a computer search through the three billion letters of the human genome should find those matching sequences. But this didn't work. The homology searches yielded far f...

Love's all in the brain: fMRI study shows strong, lateralized reward, not sex, drive

...e the strength of neural activity changed with the length of the romance. Everyone knows that relationships are dynamic over time, but we are beginning to track what happens in the brain as a love relationship matures." Helen E. Fisher, a research anthropologist at Rutgers University, New Jersey, noted tha...

Great White shark evolution debate involves WSU Lake Campus geology professor

...ears ago. They were huge sharks, approximately the length of a Greyhound bus and possessing teeth that were up to six inches long," explains Ciampaglio. "However, our research, which is based on analyzing fossils of several hundred shark teeth, shows that the Great White shares more similarities with the ma...

Genrate: a generative model that finds and scores new genes and exons in genomic microarray data

... number of local minima that is exponential in the length of the DNA sequence data, so direct application of the EM learning algorithm produces poor results. We describe a novel way of parameterizing the model using examples from the data set, so that good solutions are found using an efficient algorithm. W...

Kinovate Life Sciences Launches Nittophase?High Performance Solid Support For Oligonucleatide Synthesis

...cost, as well as potentially higher yield and full length purity, reducing cost-of-goods. NittoPhase?will be commercially available in two grades; NittoPhaseTOS?for high loading applications, and NittoPhaseROS?for lower loading applications. In this way, NittoPhase?offers a solution for the entire spectrum ...

Unexpressed But Indispensable -- The DNA Sequences That Control Development

...served non-coding elements (CNEs), with an average length of about 200 base pairs. The average sequence match is 84%: not perfect, but much higher than for coding regions shared by humans and pufferfish. A quick check showed that virtually all the sequences also occurred in rodents, chickens, and zebrafish,...

Study Models Impact Of Anthrax Vaccine

...fter an attack could be beneficial in reducing the length of timeantibiotic treatment would be needed. These findings could be animportant tool for policymakers who must develop effective strategiesfor containing an anthrax outbreak. The study is published in theDecember 16, 2004, edition of Nature. TheHop...

Potential Cure for Lymphoma in HIV patients

...had relapsedafter an initial remission. The median length of study follow-up wasapproximately two and a half years, with a range of about six months tosix years.All study patients were to undergo autologous stem cell rescue. In anautologous transplant, stem cells are removed from the patient andfrozen for l...

Open microfluidic and nanofluidic systems

...ing physics. This latter constraint applies to all length scales: if one wanted to build a robot which walks over water, for instance, a human-like robot is a bad idea while a spider-like robot is a much better choice. ### Original work: Ralf Seemann, Martin Brinkmann, Edward J. Kramer, Frederick F. Lang...

Study: Soap And Water Work Best In Ridding Hands Of Disease Viruses

...ickbert-Bennett said. That represented the average length of time researchers observed busy health-care personnel washing or otherwise disinfecting their hands at work. "Previous studies have had people clean their hands for 30 seconds or so, but that’s not what health-care workers usually do in practice, ...

Needling Chromosomes Reveals Cell Division Secret

...hechromatids apart at different points along their length and atdifferent times during cell division.The experiments revealed that the chromatids are attached to oneanother, but that they initially separate at their centers, zippingapart until they are entirely separate. Then, they can be drawn to theopposi...

Color-blind method opens new doors in DNA sequencing

... polymerase chain reaction (PCR) steps, reduce its length to a manageable size of thousands of nucleotides. Using natural replicating enzymes, the DNA is tagged with four fluorescent dyes, each corresponding to a particular nucleotide. This tagging process, called Sanger sequencing, results in smaller DNA f...

Novel Enzyme Shows Potential As An Anti-HIV Target

...ion. Without Tat, HIV transcripts don’t reach full length and can’t effect viral replication. In a new study, Melanie Ott and colleagues identify an enzyme that regulates viral transcription by modifying Tat. The regulation of HIV genes depends on a complex interplay between proviral DNA, cellular proteins...

“Nano-scissors?laser shows precise surgical capability

...so we don’tdamage anything. The pulse’s very short length makes the photons in thelaser concentrate in one area, delivering a lot of power to a tiny,specific volume without damaging surrounding tissue.?Once cut, the axons vaporized, and no other tissue was harmed.To assure the axons were actually cut, and t...

Whole genome fine map of rice completed

... shortgun approach. Through searches of 19079 full length cDNA, 97.7% of complete genes were found in the two genomes. After adjusting for residual errors of predictions with EST data, the number of genes is estimated to be between 30,000 to 40,000. Among them, only 2-3% genes are unique to any one of the t...

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