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Tag: "uniform" at biology news

Recent breakthroughs in common adult leukemia highlighted in New England Journal of Medicine

...ia," he added. A decade ago, CLL was considered a uniform disease of immature white blood cells that didn't ...tists have also since discovered that CLL is not a uniform disease but rather a disease that follows two distinct clinical courses in patients. Some patients r...

Same mutation aided evolution in many fish species, Stanford study finds

...ach time." Sticklebacks evolved from a relatively uniform marine population into today's broad spectrum of shapes and sizes when the last Ice Age ended roughly 10,000 years ago. Because ocean fish quickly evolved into such distinct populations when they colonized new freshwater lakes and streams, they are a...

Expression Project for Oncology (expO) completes first phase of standardized gene expression analyses

... Daniel Von Hoff, MD, FACP. IGC has established a uniform system for obtaining and processing tissue samples for molecular characterization studies. Clinical annotation for each tissue sample will enable researchers to form testable clinical hypotheses for use in future treatment decision making. Tissue col...

Vitamin A's paradoxical role in influencing symmetry during embryonic development revealed

...sts' description of retinoic acid signaling in the uniform ball of cells that is the early embryo, because its signaling influences both the asymmetric arrangement of organs and tissues in the interior of our bodies and the symmetrical pattern of the exterior of the trunk. Belmonte and his Salk colleagues e...

Breakthrough: Scientists create world's tiniest organic particles

...voids harsh treatment but also allows formation of uniform particles in any shape designers choose ?spheres, ...s."Prior to this, no one else has fused the highly uniform and precise methods for fabricating transistors with the organic nanoparticle world," said Bruce Bou...

Scientists discover stem cell origin of neck and shoulders

...e skeleton and assume that the bone structures are uniform and are the basic components of vertebrate organisation. Our research suggests this is wrong and actually groups of stem cells create not only the muscles of the neck and shoulder but also the skeletal structure where these muscles are attached. Thes...

Space matters: Estimating species diversity in the fossil record

... in the distribution of species. Given the lack of uniform geographic sampling in paleontological data, the impact of this effect may be significant - and likely applies to other taxa as well. Once the effect is factored in, one might expect significant adjustments in accepted patterns of global and regional...

Molecular mechanism of feather formation found

...ls of Bmp2 and Shh grow from a small bud to form a uniform ring. Shh then is expressed in specific spots along the ring, giving rise to bumps, seen microscopically as longitudinal stripes demarcating the edges of ridges in the developing barb. "Each barb ridge grows in length by recruiting new cells, which ...

New discovery blurs distinction between human cells and those of bacteria

...the first three days that cells of prokaryotes are uniform and without organization, while cells of eukaryotes have a complex organization," Yeates said. "That contrast is becoming less stark; we are learning there is more of a continuum than a sharp divide. These microcompartments, which resemble viruses be...

Nighttime Dying Linked To Sleep Apnea From Brain Cell Loss

...the first three days that cells of prokaryotes are uniform and without organization, while cells of eukaryotes have a complex organization," Yeates said. "That contrast is becoming less stark; we are learning there is more of a continuum than a sharp divide. These microcompartments, which resemble viruses be...

Field tested: Grasslands won't help buffer climate change as carbon dioxide levels rise

...the first three days that cells of prokaryotes are uniform and without organization, while cells of eukaryotes have a complex organization," Yeates said. "That contrast is becoming less stark; we are learning there is more of a continuum than a sharp divide. These microcompartments, which resemble viruses be...

New technology shows our ancestors ate…everything!

...ore scratched, with features often running in more uniform directions. However, according to Teaford, who along with researchers from the University of Arkansas, Stony Brook University, and Pennsylvania State University carried out the data analysis, the study also revealed unexpected variability in the samp...

Method slashes quantum dot costs by 80 percent

...neered a new method of producing quantum dots with uniform sizes and well-defined optical signatures. The basic recipe for making quantum dots hasn't changed much since it was first developed. A solvent is heated to almost 500 degrees Fahrenheit, and solutions containing cadmium and selenium compounds are in...

The right drug at the right time

...neered a new method of producing quantum dots with uniform sizes and well-defined optical signatures. The basic recipe for making quantum dots hasn't changed much since it was first developed. A solvent is heated to almost 500 degrees Fahrenheit, and solutions containing cadmium and selenium compounds are in...

How the neuron sprouts its branches

..., when these growing dendrites are all essentially uniform in length, they grow at about the same rate. But later, after the Golgi orient toward one dendrite, it takes off and grows dynamically to become the longest dendrite." The researchers also used tracer molecules to track the molecular cargo secreted b...

Stress substantially slows human body's ability to heal

...th a small suction device which created eight tiny uniform blisters on their arms. The skin was removed from each blister and another device placed directly over each small wound, forming a protective bubble, from which researchers could extract fluids that normally fill such blisters. The husbands and wiv...

Cuttlefish masters of disguise despite colorblindness

...that these checkerboards appeared to their eyes as uniform backgrounds. However, their results showed that cuttlefish were able to detect contrast differences of at least 15%, which Mäthger and her colleagues suspect might be a critical factor in uncovering what determines camouflage patterning in cuttlefish...

Rice scientists unveil 'nanoegg'

...l shell. But where the casing on a nanoshell has a uniform thickness ?like the peel covering an orange ?the nanoegg's covering is thicker on one side than the other ?in much the same way that a hard-boiled egg white is thick in some places and thin in others. The off-center core in the nanoegg radically ch...

Federal testing for mad cow disease a failure, law review editor says

...ng feed businesses subject to the feed ban, has no uniform plan to identify feed businesses, has no routine procedure for testing of cattle feed, does not require a notice about the ban to be placed on feed, and has repeatedly failed to notify the USDA when it discovered that cattle may have been fed banned ...

Recycled paper and compost could both be key tools to control plant disease

...is used by many growers as it provides a clean and uniform material that is suitable for plant growth ?but its very cleanliness makes the plants growing in it susceptible to quickly spreading plant diseases. In contrast compost contains a diversity of microbes that can suppress plant diseases. The ecologica...

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