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Tag: "small" at biology news

Will the plague pathogen become resistant to antibiotics?

A small piece of DNA that helps bacteria commonly found in...esistance (MDR) sequences, is carried on plasmids, small circles of DNA that are passed easily between bacteria. In this study, the same MDR plasmids found i...

Scientists identify a gene that may suppress colorectal cancer

...hers used a strain of mice that develop polyps, or small growths of tissue, in the digestive tract—the harb...sed one copy of the mutated gene, the incidence of small intestinal and colon polyps were reduced by about 90%. “This gene may give us a novel target to aid...

Scientists discover new virus caused deaths of transplant recipients from single donor

.... Known strains of LCMV have been implicated in a small number of cases of disease transmission by organ transplantation, however, the newly discovered virus is sufficiently different that it could not be detected using existing screening methods. Over 30,000 organ transplants are performed in the U.S...

Using dental X-rays to detect osteoporosis

...s, reducing the quality of life. By analyzing a small area depicting the trabecular bone on the ordinary dental radiographs, dentists can predict the osteoporotic condition of the patients to the same extent as the BMD measurements. The image analysis can be automated and does not require extra time...

Tiny clue reveals new path toward heart disease

...with the disease. They found just such a region: a small section of the long arm of chromosome 3 where just...hese DNA samples, the researchers scanned the same small section of chromosome 3 for SNPs that differed in sequence between individuals with and without coro...

Speeding 'fingertip' discovery -- 20 years of protein info in 1 place

...etry, a technology that breaks apart proteins into small fragments, separates them by size and identifies the fragments based on their mass - their size and weight. The process improves on previous techniques by breaking up proteins more gently and keeping chemical modifications like phosphorylation intact...

Protein key to organ growth

When amounts of a small protein called TCTP (translationally controlled tumor protein) are reduced in the cells of fruit flies, they are smaller than normal, indicating that the protein plays a major role in the growth and proliferation of cells, said researchers at Baylor ...

Stretching DNA to the limit

...ions by linking together the adjacent strands. The small changes in structure induced by this crosslinking can very profoundly affect the ability of DNA to recognize specific molecules, and can thus completely disrupt its ability to replicate and interact with the transcriptional machinery to synthesize pr...

Ultrasound upgrade produces images that work like 3-D movies

...hers first generated stereo ultrasound images of a small metal cage. They then advanced to ultrasound images in living animals of a heart valve and blood vessels and needle biopsies of the animals' brains and esophagi. The researchers have since recorded ultrasound images of a model human fetus that is ...

'Ancestral eve' was mother of all tooth decay

...rom Asia back to Europe, traces the migration of a small group of Asians who founded at least one group of modern-day Caucasians." Additional branches, tracing the coevolution of humans and bacteria from Asia into North and South America, will be drawn in the next phase of Caufield’s analysis. ...

Microfluidic chip helps solve cellular mating puzzle

...rs to isolate and conduct experiments on extremely small clusters of cells. "The level of control we can ac...es at low pheromone concentrations, so that only a small fraction of cells might engage in "expensive" mating behavior, which consumes a lot of cellular reso...

FDA causes unnecessary scare about common painkillers

...is somewhat limited, an analysis combining several small studies found that high doses (500 mg twice daily) of Aleve were not associated with an increased risk of heart attacks compared to a placebo, or an inactive pill. On the other hand, high doses of Advil (800 mg three times a day) and Voltaren (75 ...

Motor protein plays key role in connecting neurons

...this typically large molecule can be cut down to a small molecule that actually inhibits axon growth function," Dr. Xiong says. She suspects that negative function surfaces when the spinal cord is cut and plans to examine whether the protein is degraded in spinal cord injuries. "We already have evidence...

Scientists unravel clue in cortisol production

...f cortisol." Next the team will investigate how small molecules ?ligands ?regulate cortisol production by binding to SF-1 and controlling the receptor's ability to bind to DNA. ...

Biologically inspired sensors can augment sonar, vision system in submarines

...rs using photolithography and planar deposition. A small amount of magnetic material is electroplated onto each of the parts, which are then freed from the substrate by an etchant. When a magnetic field is applied, the induced torque causes the pieces to rotate out of the plane on tiny hinges and lock into...

In presence of fragrant cleaning products, air purifiers that emit ozone can dirty the air

Indoor air purifiers that produce even small quantities of ozone may actually make the air dirtier when used at the same time as household cleaning products, scientists at UC Irvine have discovered. Ozone emitted by purifiers reacts in the air with unsaturated volatile organic compounds such ...

Ladybugs may be cute, but watch out when they get near wine

...est member of the human genus, with a surprisingly small brain and distinctly protruding jaw, features commonly associated with more apelike members of the hominid family living as much as three million years ago. Dr. Bromage"s findings call into question the extent to which H. rudolfensis differed fro...

Man's earliest direct ancestors looked more apelike than previously believed

...est member of the human genus, with a surprisingly small brain and distinctly protruding jaw, features commonly associated with more apelike members of the hominid family living as much as three million years ago. Dr. Bromage"s findings call into question the extent to which H. rudolfensis differed fro...

Morphine makes lasting -- and surprising -- change in the brain

...henomenon in the ventral tegmental area, or VTA, a small section of the midbrain that is involved in the reward system that reinforces survival-boosting behaviors such as eating and sex ?a reward system linked to addiction. The affected synapses, Kauer found, were those between inhibitory neurons and dopam...

Ultrathin films deliver DNA as possible gene therapy tool

... his nanoscale films to coat intravascular stents, small metal-mesh cylinders inserted during medical proce...special polymers designed to bundle the genes into small tight packages that cells can import. Once inside, the genes instruct the cells to make proteins. ...

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