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Tag: "kinds" at biology news

Researchers discover how malaria parasite disperses from red blood cells

...d blood cells infected with P. falciparum with two kinds of dye, explained the study's senior author, Joshua Zimmerberg, M.D., Ph.D., Chief of NICHD's Laboratory of Cellular and Molecular Biophysics. One dye stained the blood cells green, the other stained the parasites red. In the first stage of the mer...

Scientists use gene transfer technology and common virus to block neuropathic pain in animals

... vector comes in. Although scientists can use many kinds of vectors to transfer genes into living cells, HSV has a natural ability to travel long distances along nerve fibers to reach the neural cell's nucleus, which makes it the perfect gene delivery vehicle for use in the nervous system. “When we inject...

A radical solution for environmental pollution

... like to coax T. aromatica into neutralizing other kinds of pollutants, but the first step is understanding exactly how the bug breaks down toluene. "The challenge is that the chemical reactions these bacteria use are very unusual---not the standard chemical reactions that chemists usually think about," s...

Study: Plants use dual defense system to fight pathogens

... so, there is growing evidence that suggests these kinds of responses are extremely important in restricting the growth of many pathogens." The other pathway uses disease-resistant proteins, or R-proteins, which can detect certain molecules, called effectors, that are secreted by pathogens. This pathway p...

Scientists use gene transfer technology and common virus to block neuropathic pain

... vector comes in. Although scientists can use many kinds of vectors to transfer genes into living cells, HSV has a natural ability to travel long distances along nerve fibers to reach the neural cell's nucleus, which makes it the perfect gene delivery vehicle for use in the nervous system. "When we inject...

Women feel more pain than men, research shows

...n upper time limit of two minutes is used in these kinds of studies. Other research by the Pain Management Unit has looked at the relationship between gender differences in anxiety sensitivity and pain. Anxiety sensitivity is the tendency to be fearful of anxiety-related sensations (e.g., rapidly beating ...

Firefly protein lets researchers monitor molecule linked to cancer

...gs. "Traditionally the only ways we could do those kinds of studies were either to test for levels of the drug in the blood or to label the drug with a radioactive tracer. "In the case of NF-KappaB, there were also methods that monitored IKK activity via changes in the levels of gene activation at the end...

Tissue regeneration operates differently than expected

...lly unspecialised cells which can develop into all kinds of cell types. Embryonic stem cells provide the or...lls would be able to change into lots of different kinds of tissue cells ?for example, skeletal muscle cells. Scientists led by Thomas Braun, Director of th...

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

...doing, especially on islands, to reconstruct which kinds of plants and animals -- particularly birds and mammals -- used to live there, we can open up possibilities for restoring parts of these islands to something near their original condition," he said. The only reason the living species of sloths survi...

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

...g its integrity. "This is important because these kinds of mistakes can be fatal for an organism," said Dr van den Elsen. "None of the older theories can explain how this error tolerant structure might have arisen." The new theory also highlights two amino acids that can be excluded from the doublet syst...

Life in deadly conditions

...ronomonas pharaonis has to deal with two different kinds of life-threatening conditions. It was found in pools which are strongly alkaline (pH-value of about 11) with an extremely high salt concentration (over 300 grams of salt per litre of water). The high pH-values are about the same as lye soap and the ...

A new window into structural plasticity in the adult visual cortex

...bing this question will depend on determining what kinds of structural changes might be expected, figuring out how to detect them, and then interpreting the changes. Studying the responses of axonal arbors connected to the nonpyramidal dendrites, for example, may prove instructive. Based on these results, ...

Scientists discover the molecular switch for nerve cells' insulating jelly rolls

...been known for almost 170 years that there are two kinds of axons --one is wrapped in myelin and appears white and the other is not and appears gray. Myelinated axons transmit messages in the nervous system up to 100 times faster than their unmyelinated cousins and are critical for proper neurological func...

Polymer gel can block toxic leakage problem in gene therapy

... than be left in the tumor. And that may cause all kinds of toxicity problems. "In our first new paper we demonstrated the mechanism of this dissemination. And in the second paper we developed a solution to block it." ...

Storing carbon to combat global warming may cause other environmental problems, study suggests

...y or week, we instead forecast climate given other kinds of scenarios, such as changes in land use," Roy said. Those simulations showed no evidence that such significant land conversions could help generate more rainfall except perhaps in northern Florida and southern Georgia. In general, "unlike in the t...

Cattle grazing may help rather than hurt endangered species

...erms, this means that grazing may help sustain the kinds of aquatic environments endangered fairy shrimps need to survive," author Christopher R. Pyke states. The authors looked at 36 vernal pools on two different geologic formations on a 5000-ha ranch in eastern Sacramento County, California. Their expe...

Plants have a double line of defence

...ese materials could lead to the development of new kinds of "green fungicide" with a broad range of effects in the fight against plant diseases. ...

Max Planck researchers make a breakthrough in plant stem cell research

... cells of animals, which can only produce specific kinds of tissue after the animal is past its embryonic stage, plant stem cells remain their totipotency and, therefore plants can continue growing over many years, developing new organs. But this ability comes at a price. If the number of meristematic ste...

Tsunami + 1 year: Reviving exhausted fisheries should trump replacing boats, gear, experts say

... Dec. 26 disaster and more than 9,600 boats of all kinds were destroyed. On Nias Island, a further 15-20% of fishers died in the catastrophe. Impacts on fishing capacity and infrastructure were also profound. In Aceh, for example, 83 fish landing facilities and 20 ice plants were destroyed, along with a...

Scientists map one of biology's critical light-sensing structures

...f a plant." According to Vierstra, there are many kinds of phytochromes found in every plant, and they exist in virtually all cells. They occur in greater concentrations in cells that respond directly to light, such as in root tips and new shoots. The phytochrome revealed by the Wisconsin team was derive...

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