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Tag: "smallest" at biology news

Study Demonstrates Gene Expression Microarrays are Comparable and Reproducible

... they foundthat laboratory practices comprised the smallest source of variation inthese studies. Measurement errors common to all labs were the next mostcommon contributor, and biological differences in different sampleswere the largest source of variation.“This study indicates that microarrays have a high de...

Needling Chromosomes Reveals Cell Division Secret

... where the needles are." Nicklas said that eventhe smallest misstep could result in broken needles, stretchedchromatids or ripped-apart cells. However, he said, Paliulis masteredthe delicate technique and performed numerous experiments pulling thechromatids apart at different points along their length and atd...

Biodiversity hotspots identify conservation priorities

... zacatuche (Romerolagus diazi), one of the world's smallest rabbits, which is found only in the mountains surrounding Mexico City. The hotspot is also home to up to 200 species of butterfly, of which 45 are endemic, and plays host to one of the world's most famous wildlife spectacles, the over wintering mass ...

Nanoparticles offer new hope for detection and treatment

...oparticles, we believe we would be able to see the smallest melanoma tumors when they are just large enough to begin new blood vessel formation. Plus, we should be able to deliver chemotherapeutic drugs right to melanoma cells, because melanoma tumors create blood vessels using their own cells." ...

Mystery Blood Vessel Disorder Implicated In 'Mini' Strokes

... all strokes arise from blood flow problems in the smallest blood vessels of the brain. Patients with the disease are usually found to have high blood pressure, but the causes of the disease are unknown. Using MRI, Amarenco and his colleagues studied 510 patients who had suffered strokes and found that the s...

Test for early detection of prostate cancer shows promise

... make it more sensitive so it can pick up even the smallest traces of the marker, and to verify its usefulness for detecting prostate cancer in a larger sample of patients, said Getzenberg. Prostate cancer is the most common type of cancer found in American men. The American Cancer Society estimates that the...

UCSD medical/bioengineering reseachers show titanium debris satobtage artificial joints

...when the titanium particles were present, with the smallest and largest particles causing the greatest weakening. The researchers demonstrated how different-sized titanium particles affected bone-building cells called osteoblasts and bone-destroying cells called osteoclasts. Microscopic studies revealed osteo...

Scientists discover global pattern of big fish diversity in open oceans

...These two studies show surprising congruence. "The smallest animals in the ocean and some of the largest show the same pattern of diversity at the global scale," says Steven D'Hondt an author of the 1999 Nature paper on zooplankton. "I would have never woken up and said that tuna necessarily show the same div...

Motor transport in bio-nano systems

...mechanical work. In this way, they can utilize the smallest possible amount of fuel. Both filaments and motors can be isolated from biological cells and used to construct biomimetic transport systems. A relatively simple example for such a system consists of filaments which are aligned on a substrate surface...

Measuring hidden parasites in falciparum malaria

...ells trapped (sequestered) in the capillaries--the smallest blood vessels in the body. The researchers estimated total amount of malaria parasites in the body by measuring a protein--Histidine-rich protein 2 (PfHRP2)--which is liberated into the blood when malaria-infected red cells spilt. Using this method...

Microbe has huge role in ocean life, carbon cycle

...y and Diversa Corporation have discovered that the smallest free-living cell known also has the smallest genome, or genetic structure, of any independent cell - and yet it dominates life in the oceans, thr...

'Patient-choice' C-section rate rises 36%: HealthGrades study

...varies widely from state to state. Arizona had the smallest increase, with 15.7 percent, while Nevada had the largest increase of 56.7 percent. As in past HealthGrades studies, Florida, New York and New Jersey had the highest rates of "patient-choice" C-sections in the latest year studied, 2003. The rates and...

DNA size a crucial factor in genetic mutations, study finds

...re increasingly larger. The difference between the smallest and largest analogs was only one angstrom, or a te...n live E. coli bacteria. In contrast to this, the smallest and largest analogs in the set were rejected by the enzyme and the bacteria. According to Kool, the...

DNA self-assembly used to mass-produce patterned nanostructures

...ical circuits at a scale 10 times smaller than the smallest circuits now being manufactured. Instead of usin...less than one ten-millionth of a meter square. The smallest features on these square DNA lattices are approximately five to 10 billionths of a meter (nanometers...

Many needles, many haystacks

...) promises to answer this question for some of the smallest and trickiest components in the cellular toolbox. Their work appears in the current issue of the Public Library of Science's on-line journal, PLoS Biology. A protein consists of a sticky string of amino acids which usually folds up because of attrac...

Fossil find: 'Godzilla' crocodile had head of a dinosaur, fins like a fish

...rgantuan crocodile was more closely related to the smallest of its brethren than any of the larger species. The shape of the nostrils, eye sockets, and other areas of the skull combined with a telltale groove in its jaw to prove its lineage. “This is the most remarkable change in the size and shape of the te...

Odd energy mechanism in bacteria analyzed

...e world's oceans. The microorganism is SAR11, the smallest free living cell known and probably the most abund...ing for a billion years or more, but they have the smallest genetic structure of any independent cell and were only first discovered by OSU scientists in 1990. ...

New study of the world's smallest elephant

The world's smallest elephant species, the newly described Bornean elephant, will be the focus of a Cardiff University study in Sabah, Malaysia for the next three years. The Bornean elephant has recently been confirmed as a separate sub-species, dramatically increasing...

Setting the standard for computer models of life

...he molecular components of living things, from the smallest molecules and ions to the genetic code. These 'parts lists' help them to build computer models that simulate living processes. By combining models of simple processes they hope to understand and faithfully represent how entire biological systems - ...

Minimal genome should be twice the size, study shows

... been studied by scientists trying to identify the smallest collection of genes ?or minimal genome ?that is needed for maintaining life. Traditionally scientists have done this by removing, or 'knocking out', a series of individual genes from a bacterial genome to see what effect this has on its ability to ...

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