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Tag: "reason" at biology news

Small molecule inhibitor of cholera discovered

...approach should be widely applicable. "There is no reason our results cannot be replicated for a number of other important pathogens," Mekalanos said. ...

Study uncovers placental microtransfusions lead to transmission of AIDS virus during childbirth

... and colleagues think they have discovered a major reason why that occurs. A new study they conducted with 149 pregnant HIV-infected women in the African nation of Malawi showed that tiny amounts of virus-laden blood leak from women's placentas to babies during labor. All of the subjects and their babies ha...

The Antarctic Ocean floor

... shortly be working in the Bellingshausen Sea. The reason why these waters have remained almost unexplored is due to its adverse climate which, in turn, has assured that human presence has been scarce. On this present campaign the scientists will trawl the ocean floor at up to 2000 metres depth, using both...

Once-dreaded leprosy 'replaced' by tuberculosis, say researchers

...he scourge had practically disappeared there. The reason seems to be, say researchers at the Hebrew University of Jerusalem and in London, that tuberculosis, a far more deadly disease, overtook leprosy, killing millions throughout Europe. Their conclusion is based upon the examination of DNA from human re...

Protein behind autumn color splendor identified

...perennials lose their chlorophyll in the fall. The reason for this is that the proteins in the leaves contain amino acids that the plant needs to recycle. The leaves' proteins are therefore degraded and the amino acids are stored in the trunk, branches, and roots until next year, when they are used as build...

Amphetamines reverse Parkinson's disease symptoms in mice

...phetamines are controversial drugs, and there's no reason to suggest that amphetamines themselves should be used to treat Parkinson's," Gainetdinov said. "However, the chemical structure of amphetamines may lead to new, amphetamine-like drugs, that might provide a more lasting and beneficial alternative to ...

Scientists crack 40-year-old DNA puzzle and point to 'hot soup' at the origin of life

... the code at some point in the past. One possible reason for this is that the Last Universal Common Ancestor (LUCA), which evolved into all life on earth, lived in a hot sulphurous pool or thermal vent. As it moved into cooler conditions, it was able to take up these two additional amino acids and evolve i...

MicroRNAs have shaped the evolution of the majority of mammalian genes

...t, and cancer," says Farh. "Our genomes have good reason to maintain the microRNA targeting sites necessary for turning down these genes at the appropriate place and time." An emerging idea is that microRNAs often act to reduce the quantity of protein a gene produces without shutting it off all together. ...

Emerging staph strains found to be increasingly deadly and deceptive

...eumonia, where bacteria destroy lung tissue. "The reason that some mild infections become severe or fatal is not well understood, but virulence is often associated with certain strains," says Jovanka Voyich, Ph.D., of RML, the study's lead author. To cause human disease, bacterial pathogens must avoid bein...

Research casts doubt on circulating stem cells

... The myth of a circulating jack of all trades The reason is probably that in nearly all cells released into the blood from bone marrow many genes are permanently "switched off" and the cells cannot simply be switched back on again. After all, what comes from bone marrow is generally blood and not muscle ti...

U-M scientists say fused genes trigger the development of prostate cancer

...ease." Disease association research is the main reason why the group from Calit2 and ICSI opted to identify tag SNPs across the entire NCBI database and make all of them available to the research community. Said Halperin: "If you are going to perform a disease association study, it's more economical to u...

California computer scientists double volume of data in NIH biotech repository

...ease." Disease association research is the main reason why the group from Calit2 and ICSI opted to identify tag SNPs across the entire NCBI database and make all of them available to the research community. Said Halperin: "If you are going to perform a disease association study, it's more economical to u...

Preventing a pandemic: Study suggests strategies for containing a flu outbreak

...ay, 4 August. "Our findings indicate that we have reason to be somewhat hopeful. If -- or, more likely, when -- an outbreak occurs in humans, there is a chance of containing it and preventing a pandemic. However, it will require a serious effort, with major planning and coordination, and there is no guaran...

Study shows big game hunters, not climate change, killed off sloths

...near their original condition," he said. The only reason the living species of sloths survive is that they live high up in trees, where their green-algae-colored fur camouflages them, Steadman said. "God save the sloth that comes down to the ground because usually somebody is there to kill it," he said. F...

Picky female frogs drive evolution of new species in less than 8,000 years

...ritz said. "This work has led me to think that the reason is complex topography with lots of valleys and ste...reeding experiments, the biologists discovered the reason for this choosiness: While northern and southern lineages could breed successfully, they apparently ...

UF scientist finds unexpected link between cat and human AIDS viruses

...s in which the disease had not progressed for some reason over several years. To determine the extent to which the human and feline AIDS viruses react to each other, and any implications that might exist for vaccine efficacy, Yamamoto began experimenting with long-term, nonprogressive strains of FIV that l...

Corn grain mould used as pesticide

...tbrush-shaped mould is ubiquitous. This may be one reason for the high rate of liver cancer in Africa. "Our colleagues from the IITA in Nigeria recently succeeded in proving that 99 out of 100 children from Benin and Togo had aflatoxin in their blood," Professor Richard Sikora of the Bonn Institute of Plant...

Prozac for future Plants on Mars

...doctoral researcher in plant ecology. "There is no reason for roots to fight if they belong to the same plant." The question was, do plants recognize their own roots and avoid competing with them and how do they do this? Working with common garden peas, Falik worked with Dr. Ariel Novoplansky at Ben Gurion...

Plants discriminate between self and non self

...doctoral researcher in plant ecology. "There is no reason for roots to fight if they belong to the same plant." The question was, do plants recognize their own roots and avoid competing with them and how do they do this? Working with common garden peas, Falik worked with Dr. Ariel Novoplansky at Ben Gurion...

Researchers discover new tumor defense system

...cular Studies in San Diego, CA, have added another reason to this list. They discovered that tumors secrete fatty acids which inhibit the cytotoxic T lymphocytes' ability to kill tumor cells. "We found two things," explains Dr. Kleinfeld. "First, the most common type of free fatty acids, which at normal le...

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