size 2 4

Tag: "size" at biology news

Hydrogen and methane provide raw energy for life at 'Lost City'

...each kind of animal, most are only a centimeter in size and have translucent or invisible shells so it's no wonder we didn't suspect the actual diversity," says Kelley, who was chief scientist on the expedition, which like the 2000 voyage was funded by the National Science Foundation. Other large organism...

Radio-tracking associated with 'dramatic shift' in water vole sex ratio

...Conservation Research Unit had been monitoring the size of two populations - one in Norfolk and one Wiltshire - when they noticed a 48% decline in the number of females born at the Norfolk site. At both sites vole numbers had been monitored using small traps baited with apple and carrot during 2002 and 20...

What the eye doesn't see

... patterns printed on them. By varying the colours, size and location of patterns on the moths the team were able to mimic real tree characteristics and identify which pattern combinations were the most successful. Professor Innes Cuthill said: "The rate at which mealworms were eaten by birds gives a meas...

Bee mites suppress bee immunity, open door for viruses and bacteria

...tick on the body of a bee. The mites are about the size of a pin head, dark brown in color and visible on close inspection. This bee mite probably arose in the Eastern or Chinese Honey Bee population and hopped over to the United States in 1987. They quickly infested western or European honey bees. One s...

Purdue researchers use enzyme to clip 'DNA wires'

... one billionth of a meter, or roughly 10 times the size of a hydrogen atom. The Purdue researchers sliced the DNA wires with an enzyme called BamH1, one of numerous restriction enzymes that are used in standard genetic engineering techniques to snip DNA so that scientists can alter the genetic structures...

Researchers Find New Technique To Identify Fetal Genetic Material From Amniotic Fluid

...noninvasive methods such as measurement of uterine size or anatomic evaluation by fetal sonography. In addition, genetic analysis can be performed on amniotic fluid components ? They add that the "cell-free component of the amniotic fluid is discarded after these analyses and is therefore available for re...

Chemical Engineer Kao Explores Antibiotic Synthesis With DNA Chips

...sts of single-stranded DNA arranged on a wafer the size of a postage stamp. The genetic sequence of the DNA tethered to the chip is known. Then researchers add a sample with an unknown composition of fluorescently labeled DNA molecules. The base pairs in the sample's single-stranded DNA, groups of which c...

Columbia study shows widely used artery clearing device does not help patients during heart attack

...ceived the treatment. The study also measured the size of the heart attacks by measuring the uptake of a tracer in the heart, and found that there was no difference for patients who received distal protection. According to Dr. Stone, not using distal protection devices will reduce the cost of angioplast...

Scientists use manufacturing methods to reconstruct mastodon

...g bones from another specimen of the same species, size and stage of development, for instance, or manually sculpting a replacement bone, based on measurements and comparisons with the rest of the skeleton. Now, however, Fisher and his team are using 3-D digitization, modeling and rapid prototyping—techn...

Evidence of 600-million-year old fungi-algae symbiosis discovered in marine fossils

...ens -- each of which was less than a millimeter in size -- show fossils of coccoidal or spherical cells surrounded by a net of fine filaments," Yuan said, describing the new fossils. The scientists interpret the coccoidal cells as being sheathed cyanobacteria or possibly green algae. "The filaments have ...

Mice brains shrink during winter, impairing some learning and memory

...rformance. "We predicted that when you reduce the size of the hippocampus, it would have an impact on lea...mone melatonin which controls the changes in brain size and function in mammals such as these white-footed mice. Scientists know that levels of melatonin ar...

Census of Marine Life explorers surprised by diversity, density of Arctic creatures

...s of ice sheet (3,250 square kilometers, about the size of Rhode Island) disintegrated in less than a month, what scientists have called "staggering" speed. The work builds on that of marine scientists who have plumbed the depths of the Weddell Sea, off the coast of Antarctica, and the Scotia Sea (betwee...

New miniaturised chip dramatically reduces time taken for DNA analysis

...nsors for analysing DNA. The sensors have the same size and thickness as a fingernail and reduce the time needed to identify DNA chains to several minutes or a few hours, depending on each chain. These sensors can be applied to many different tasks, ranging from paternity tests and identifying people to d...

NCI Researchers Confirm the Effectiveness of Immunotherapy Approach to Treating Melanoma

...erapies experienced a significant reduction in the size of their cancers as a result of receiving a new immunotherapy. This immunotherapy consisted of a combination of chemotherapy and reintroduction of their own (autologous) activated lymphocytes. Autologous lymphocytes are white blood cells that have be...

Researchers reveal secrets of flying snakes

It seems size does matters after all. But for flying snakes, sma...ental Biology, scientists described the effects of size and behavior of flying snakes, and found that the smaller animals were better gliders. "Despite the...

Unique library of plant genes germinates, takes root at UNC

...r example, the lily genome is roughly 40 times the size of the human genome." Nevertheless, the gene content of lilies can be predicted reasonably well by looking at a related plant with a small genome, like rice, he said. To breed better crops, it's important to be able to leverage the information from ...

Ancient DNA helps clarify the origins of two extinct New World horse species

...gh the different horses in each species "varied in size and shape quite a bit" regionally and temporally, Cooper explains, "we see no genetic evidence that these are different species." If true, the study's new model could provide a tool for exploring how environmental adaptations give rise to morphologi...

MIT engineers an anti-cancer smart bomb

... nanocells to evade the immune system, while their size (200 nanometers) makes them preferentially taken into the tumor. They are small enough to pass through tumor vessels, but too large for the pores of normal vessels. Once the nanocell is inside the tumor, its outer membrane disintegrates, rapidly dep...

Certain fish have a special mating preference

...es with larger genitalia, who lose out because the size of their organ slows them down, making them ripe f...found that in predator-free environments gonopodia size was larger, as there is minimal cost for large genitalia in that environment. Bigger is better for m...

IMF Launches World’s First DNA Database for Myeloma Patients

...es with larger genitalia, who lose out because the size of their organ slows them down, making them ripe f...found that in predator-free environments gonopodia size was larger, as there is minimal cost for large genitalia in that environment. Bigger is better for m...

1 2 3 4 5 6 7 8 9 10