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Tag: "equal" at biology news

South America's vast pantanal wetland may become next everglades, UNU experts warn

...re than 165,000 square kilometers ?an area roughly equal to Florida ?in the heart of South America, the Pantanal is the world's largest freshwater wetland, of active interest to U.S. scientists for insights into the lost biodiversity of Florida's famed Everglades, altered by drainage projects starting in t...

Researchers discover chemical compounds that affect plant growth

...onents and Gravitropic Response. Her team included equal contributions from UCR colleagues Marci Surpin, Marcela Pierce-Rojas, Clay Carter, Glenn R. Hicks. Co-author Jacob Vasquez originally came to the Raikhel lab from San Bernardino Valley College as a participant in the National Science Foundation's Res...

Cooperation is key—a new way of looking at MicroRNA and how it controls gene expression

...NA should be expected to bind to a piece of RNA of equal length and complementary sequence. And since these sequences of the microRNA were known, a computer search through the three billion letters of the human genome should find those matching sequences. But this didn't work. The homology searches yielde...

Scripps scientists find potential for catastrophic shifts in Pacific ecosystems

...t recover its previous condition simply through an equal but opposite change in temperature. That is, much like a financial market that takes much longer to recover than to crash, an ecosystem that is perturbed into an irreversible shift (e.g., by overfishing) may never be the same afterwards. Finding lin...

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

... distributed on the right and left axis. Normally, equal numbers of somites occur on each side. In addition to improving scientific knowledge about early development, these research findings are relevant to the future development of treatments based on embryonic stem cells. As explained by Salk senior re...

Amazon source of 5-year-old river breath

...tmosphere, some 500 million tons a year, an amount equal to what is absorbed each year by the Amazonian rainforest. "Having established that the amount of carbon outgassing is much greater than anyone imagined, the issue then becomes, where does it come from," Mayorga says. "If it's young, that indicates ...

First production of human monoclonal antibodies in chicken eggs published in Nature Biotechnology

...entical binding curves, similar affinities, and an equal ability to be internalized by antigen on prostate cancer cells. At the same time, chicken-produced antibodies lacked the sugar residue, fucose, which greatly increases their cell-killing activity compared to CHO-produced antibodies." To create the a...

Beetle-inspired switch uses water for bonding

... which clings to a palm leaf at adhesive strengths equal to a hundred times its own body weight -- the human equivalent of carrying seven cars -- the switch in its most basic form uses surface tension created by water droplets in contact with a surface, in much the same way as two pieces of wet paper cling...

Organic farms produce same yields as conventional farms

...still make the net economic return per acre either equal to or higher than that of conventionally produced crops. Organic farming can compete effectively in growing corn, soybeans, wheat, barley and other grains, Pimentel said, but it might not be as favorable for growing such crops as grapes, apples, che...

Naturally occurring asbestos linked to lung cancer

...vided occupational history. As a control group, an equal number of age- and gender-matched pancreatic cancer cases was selected (since pancreatic cancer has no known association to asbestos exposure). For both the mesothelioma and pancreatic cancer cases, the researchers employed sophisticated geographic i...

Secret sex life of killer fungus?

...ion of 290 specimens of the fungus revealed nearly equal proportions of two different sexes, or "mating types," which in theory could have sex with each other. Additional work on specific populations of the fungus in America and Europe showed that genes had been, or were being, exchanged between individual...

Neanderthal teeth grew no faster than comparable modern humans'

...d the researchers that a Neanderthal childhood was equal to a modern human's. "The missing key bit of data to show that would be evidence for when the first molar tooth erupted in the Neanderthals, and we simple have no evidence of when that occurred," she said. The length of time is important, the res...

New law for resolution allows unprecedented sharpness in fluorescence microscopy

...e details smaller than a distance where delta d is equal to 200nm using conventional lenses and visible light. For a long time, Abbe's law was regarded as being insurmountable. For higher resolution, the textbook knowledge was that a complicated and costly electron or scanning tunneling microscope would b...

Male elephants woo females with precise chemistry

...ontalin than "minus," but the ratios became almost equal as the elephant matured, especially between ages 3...ic composition of the frontalin secreted is almost equal in the middle part of a musth episode, a period of prime signaling by male elephants. In contrast, a...

Older female fish prefer imperfect male mates, study finds

...cies to video animations of male fish, one with an equal number of bar markings on each side of the body, and one with an unequal number of bars on each side. The animations simultaneously were projected on opposite sides of a tank, and researchers measured the time the female spent with each animation. Wh...

Overfishing may drive endangered seabird to rely upon lower quality food

...arbon isotopes. "It takes about 70 to 80 krill to equal the energy value of one sardine," said Beissinger. "When murrelets have to rely upon less nutritious foods, they need to spend more time diving underwater to catch and eat them, and have less energy to make and lay eggs. The availability of food comm...

Men and women differ in brain use during same tasks

...nditions in which the male and female ratio is not equal or in which males and females show different symptoms and different profiles for the same conditions. Thirty-three healthy, right-handed volunteers (23 male and 10 female) were used in the study. The researchers say this a relatively small sample, ...

Cortex matures faster in youth with highest IQ

...vals. The resulting scans were divided into three equal groups and analyzed based on IQ test scores: superior (121-145), high (109-120), and average (83-108). The researchers found that the relationship between cortex thickness and IQ varied with age, particularly in the prefrontal cortex, seat of abstr...

Predicting success

... low concentration until the concentrations become equal all around. However, in some cancers, even though the material "wants" to spread out evenly, fluids inside the tumor may be exerting pressure to prevent this. When the internal pressure created by these fluids rises above a certain level, it acts as ...

Natural selection at single gene demonstrated

...on structure, such as assigning each individual an equal chance of reproducing. Co-author Magnus Nordborg, associate professor of molecular and computational biology in USC College, predicted that earlier research would need to be revisited because the model makes it too easy to infer selection at any giv...

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