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Tag: "comparing" at biology news

New mitochondrial DNA gene chip may be early cancer diagnosis tool

...ciated with early cancer. In ongoing work, NIST is comparing capillary electrophoresis methods with a newly developed DNA sequencing chip. The mtDNA chips are a promising research tool for early clinical cancer diagnosis that may be faster, easier to interpret, and provide higher throughput than other methods....

Study shows how retinoic acid enters a cell's nucleus

...roteins without an NLS enter a cell's nucleus. By comparing the 3-D structures of the CRABP-II protein before and after it comes in contact with RA, Noy and Sessler made a startling discovery: When exposed to RA, three amino acids on the CRABP-II molecule flip their positions, exposing positive charges. Combi...

Stem Cells to Solve the Blood Shortage Problem?

...act of the tsunami at 24 different mangrove sites, comparing the event's effects to the size, history, and quality of the local mangroves. The researchers found that where mangroves occur, they did in fact offer protection from the tsunami. Mangrove fringes near the water's edge appeared to take most of the en...

Could better mangrove habitats have spared lives in the 2004 tsunami?

...act of the tsunami at 24 different mangrove sites, comparing the event's effects to the size, history, and quality of the local mangroves. The researchers found that where mangroves occur, they did in fact offer protection from the tsunami. Mangrove fringes near the water's edge appeared to take most of the en...

New insights into how Huntington's disease attacks the brain

...uld show little or no signs of the disorder. When comparing the two groups, the UCLA team discovered that the first set of mice demonstrated problems with motor control and showed visible degeneration of the target brain cells. In contrast, the second set of mice showed little signs of the disease. "This is ...

Big differences in duplicated DNA distinguish chimp and human genomes

A study comparing the genomes of both humans and chimpanzees has found that much of the genetic difference between the two species came about in events called segmental duplications, in which segments of genetic code are copied many times in the genome. The study appe...

Bioinformatics reveals new gene regulation system

By comparing 140 sequenced bacterial genomes, researchers have ... escaped experimental detection, he suggested. "By comparing hundreds of genomes, you can see patterns that are not seen when looking at just a couple of them." ...

UI researcher studies deafness in fruit flies, humans

... generate as the flies listen to the love song. By comparing the electrical impulses generated by the normal flies to those generated by myosin VIIA mutant flies, they showed that the myosin VIIA gene is essential for hearing in flies, as it is in humans. Now that they know the same molecule is used, scientis...

Best research work in the area of wine growing

... irrigation, the gaseous interchange was measured, comparing it with plants that had not suffered stress. From their results the researchers deduced that "the occurrence of a period of hydric stress modifies the hydric relations of the grapevine even when irrigation had been re-established". This effect confi...

Leprosy genome tells story of human migrations, French researchers report in Science

A French genetics study comparing strains of leprosy-causing bacteria has revealed some surprises about how the pathogen evolved and how it was spread across the continents by human migrations. The research, led by scientists at the Pasteur Institute in Paris, appears in the 13 May i...

Venom doc tracks down snake bioweapons

...s a tremendous resource waiting to be tapped." By comparing the amino acid sequence of each toxin to the amino acid sequences of multiple proteins from non-venomous tissues, Fry was able to reconstruct the phylogenetic history of each snake venom constituent. He determined which protein family each toxin type...

Mutation in clams protects against paralytic shellfish poisoning but raises human health risk

...ng these differences down to the genomic level and comparing DNA sequences from the two populations enabled Connell to identify the single nucleotide mutation that corresponded with toxin resistance. She showed that the mutation changed an amino acid in a channel, a protein in the nerve cell membrane that allo...

UCLA study assesses cost-effectiveness of Hepatitis B drugs

...ducted the largest and most comprehensive study in comparing the cost-effectiveness of current modern drugs for...ystem. Researchers performed an economic analysis comparing the cost-effectiveness of five competing drug treatment strategies for chronic hepatitis B: 1) No tr...

15-year hunt finds cause of pseudothalidomide syndrome

...archers found important genetic changes in part by comparing different species' genetic sequences, most of which were published only within the last four years. "In 1989, we were collecting samples and characterizing the chromosome problem in cells from people with Roberts syndrome," Jabs remembers. "We knew ...

Stealth Worms May Improve Insect Pest Control

...nvironment," Stock says. Some of her work involves comparing commercially available formulations of nematodes with custom- made applications of local nematodes. In Arizona, Stock's team is collecting native species of EPN for pest control trials in citrus and iceberg lettuce, with funding from the Arizona Cit...

New design : complete

...as weighing yourself before and after exercise and comparing that number to the amount of fluid you consumed throughout. "All serious distance athletes should find out what their rate of fluid loss is and individualize their fluid intake prior to a distance event," Dr. Levine said. "It's also good to accept ...

Bush, Cheney and Rumsfeld are now species of slime-mold beetles -- but strictly in homage

...as weighing yourself before and after exercise and comparing that number to the amount of fluid you consumed throughout. "All serious distance athletes should find out what their rate of fluid loss is and individualize their fluid intake prior to a distance event," Dr. Levine said. "It's also good to accept ...

Too much water may be as dangerous as too little during long-distance athletic events

...as weighing yourself before and after exercise and comparing that number to the amount of fluid you consumed throughout. "All serious distance athletes should find out what their rate of fluid loss is and individualize their fluid intake prior to a distance event," Dr. Levine said. "It's also good to accept ...

The biggest family tree ever

...rehistoric human relationships using genetics. By comparing the genetic markers, the UA scientists' work will unveil new aspects of people's family trees, ones that are almost impossible to discover through traditional genealogical methods. In contrast to written historical records that can be lost or oral hi...

One gene links newborn neurons with those that die in diseases such as Alzheimer's

...identify which genes were active, or expressed, by comparing them with 800 known genes from the zebra finch. They expected to find a few overactive genes in the replaceable neurons. But instead, one gene turned up in consistently low levels. The gene was UCHL1. "We expected UCHL1 would be high in all kinds ...

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