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Tag: "again" at biology news

Movie spies on malaria parasite's sneaky behavior

...tion in its wake, the parasite is finally taken up again from the blood when another mosquito bites. Then it reproduces and waits for the mosquito to bite again to infect another person. Researchers have long assumed that the form of the parasite that infect...

Meth promotes spread of virus in HIV-infected users

...ic cells, which serve as the first line of defense again pathogens, and two receptors on these cells -- HIV binding/attachment receptors (DC-SIGN) and the meth-specific dopamine receptor. Dendritic cells overloaded with virus due to the action of methamphetamine can overwhelm the T cells, the major target ...

3-D model reveals secrets of metastasis

...tumor and settles in a new location, where it once again divides. Pharmaceutical companies typically use simplistic two-dimensional assays for this process, which is known as metastasis, to evaluate anti-cancer therapeutics. In these assays, cells crawl across the surface of a matrix, traveling in a single...

Research links protein to breast-cancer migration

...s been awarded by the charity to Dr Keith Brennan, again in Life Sciences, to uncover how a group of proteins called Notch are able to protect breast-cancer cells from dying. "Notch proteins appear to shield breast-cancer cells from the body's natural defences and also from being destroyed by chemotherapy...

Study shows pine bark naturally decreases severe chronic venous insufficiency

... a.m. to avoid the swelling effect of standing and again after 30 minutes of resting with feet elevated. Measurements were taken at the beginning of the study and after four and eight weeks of treatment. A composite, analogue score based on signs and symptoms (edema, pain, restless limbs, subjective swelli...

Pathway toward gene silencing described in plants

...silenced and how silenced alleles can be turned on again may someday have practical benefits. For instance, tumor suppressor genes that normally help keep cells from dividing uncontrollably are often silenced by DNA methylation and histone (proteins that wrap DNA) modifications in cancer cells, contributi...

When it comes to gene transcription, random pauses aren’t quite so random, study finds

...same 240-base pair sequence repeated over and over again eight times in a row," Block said. When molecules of RNAP were attached to the templates, they behaved as predicted, pausing briefly at all of the backtrack and hairpin pause sites, but not actually backtracking or forming hairpins. "That's great,"...

Survivors of childhood polio do well decades later as they age

... neurons at the beginning of this period, and then again five and 15 years later with electrophysiological testing, strength testing and timed tests of performing basic functions. They found modest declines. Each patient also completed questionnaires about symptoms of progressive weakness at the beginning ...

New approach to vaccine development provides potent, long-lasting immunity

...en pushed repeatedly in the opposite direction and again the subjects were asked to keep the joystick centered. The research team found that after all this pushing in different directions the subjects still were inclined to push the joystick in the first direction, even when the joystick was perfectly ce...

Robotic joystick reveals how brain controls movement

...en pushed repeatedly in the opposite direction and again the subjects were asked to keep the joystick centered. The research team found that after all this pushing in different directions the subjects still were inclined to push the joystick in the first direction, even when the joystick was perfectly ce...

Honey helps problem wounds

...t, the medical use of honey is becoming attractive again for the treatment of wounds.' Dr. Simon works on the cancer ward of the Bonn University Children's Clinic. As far as the treatment of wounds is concerned, his young patients form part of a high-risk group: the medication used to treat cancer known a...

Indonesia - disaster relief aid in action

...e the Indonesian island of Java - was to call once again on its Renal Disaster Task Force (RDRTF). Under the leadership of Dr. Raymond Vanholder, the Task Force acted rapidly by sending two scouts to join a team from Médecins Sans Frontières (MSF). The two Task Force members Dr. Arjan van der Tol, Nephro...

NASA study solves ocean plant mystery

...sunlight and some of that energy is given back off again as red light. Scientists looked at approximately 140,000 measurements of fluorescence made from 1994 to 2006 along 36,040 miles of ship tracks. They found that phytoplankton give off much more fluorescence when the plants do not have sufficient iron....

ANU scientists crack DNA replication mystery

...ssor Dixon said. "This discovery illustrates once again how the quest for fundamental knowledge can result in unexpected technological progress." ...

Genetically altered mice no longer like cocaine

...utes. On the last day of the experiment, mice were again free to roam the box, and no injections were given. The animals were videotaped while they were in the box. "The normal mice spent more time in the compartment where they had received the cocaine injections," Gu said. "These animals were seeking mor...

Life, the remake

If the history of life were to play out again from the beginning, it would have a similar plot a...stances that you are likely to see the same things again and again." Vermeij's view contrasts with that put forward by the late Stephen Jay Gould and others...

Predicting successful outcomes in living-donor liver transplants

...ncluding every 12 hours in the first 72 hours) and again at 21 and 28 days following surgery. The results showed that immediately following transplant, elimination of ICG improved for all patients in the study when compared to pre-operative tests, but within 24 hours ICG elimination was significantly bett...

Anti-inflammatory drug's potentially deadly side effect found to be rare

...w in natalizumab will likely have to be considered again as other drugs are developed using the same customized targeting techniques. "This drug is a good example of the potential of developing drugs with very specific biological targets in mind," Clifford says. "But this experience also reminds us that ...

Inflammation and drugs to control this activity studied in a variety of tumors sites

...isms, but we're on the road to finding out. "This again points to the fact that brain tumors are caused by a combination of several environmental, endogenous and genetic factors," he said. "They are not related to one specific cause, but rather, to several that are interplaying with one another to create ...

New crop of technology reveals plant health

...their size, with a current range of about 10m, but again the Tyndall team hope to push their range further. "Finally, they are also looking at the potential of 'Power Harvesting' for the chip, where it would supply its own energy needs through solar energy or ground vibrations, making the chip completely i...

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