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Tag: "salt" at biology news

Emory Study Tests Bone Marrow Stem Cells to Improve Circulation in Legs

...hage colony stimulatingfactor) or placebo (sterile salt water) three times a week for twoweeks. The level of EPCs in the volunteers' blood will be measuredbefore, during and after administration of the drug or placebo. Thestudy is randomized and blinded, which means that volunteers will notknow whether th...

Sea skate experiment sheds light on human cell transport

...tand how these skinny, graceful fish can swim from salt water to fresh water. For humans, such a drastic environmental change would prompt an equally drastic physiological change: Our cells would take in too much water, diluting blood and other body fluids and rapidly causing death. So how do skates do it...

Researchers trace evolution to relatively simple genetic changes

...ogy, in jaws and teeth, in the ability to tolerate salt and different temperatures at different latitudes," he said. Kingsley, Schluter and their co-workers picked one trait -- the fish's armor plating -- on which to focus intense research, using the armor as a marker to see how evolution occurred. Stick...

Octopuses occasionally stroll around on two arms, UC Berkeley biologists report

...ogy, in jaws and teeth, in the ability to tolerate salt and different temperatures at different latitudes," he said. Kingsley, Schluter and their co-workers picked one trait -- the fish's armor plating -- on which to focus intense research, using the armor as a marker to see how evolution occurred. Stick...

Family trees of ancient bacteria reveal evolutionary moves

... exist in brackish water environments, then higher salt ones, marine and hyper saline (salt crust) environments. Cyanobacteria are organisms that gave rise to chloroplasts, the oxygen factory in plant cells. A half billion years ago Cyanobacteria predated more complex organisms like multi-cellular plants...

Rats infected as newborns grew up vulnerable to memory problems during an immune challenge

... with the common intestinal bacteria E. coli, with salt water, or with nothing. In rats, Day 4 is like the... less often than the rats who'd been injected with salt water as newborns. In other words, under immune stress, the early-infected rats learned to fear the ...

Dead zone area in Gulf could be increasing, researchers say

...n levels between the fresh river water and heavier salt water could results in increased hypoxia, which creates the dead zone." Hypoxia is a term for extremely low levels of oxygen concentrations in water. Hypoxia can result in fish kills and can severely impact other forms of marine life where it is pre...

Substance protects resilient staph bacteria

...ate immune defense, human antibiotic compounds and salt concentrations similar to levels found on human skin. Dr. Otto's group also used mice fitted with catheters to demonstrate that the S. epidermidis strain deficient of PGA was not able to cause infection while the other strains containing PGA did. ...

Transgenic plants remove more selenium from polluted soil than wild plants, new tests show

...bic meters of sediment contaminated with selenium, salt and boron remain in the San Luis Drain, a concrete-lined canal originally intended to channel irrigation wastewater from Central Valley farms to the Sacramento River Delta near Antioch. Selenium is considered an essential trace mineral for both human...

WHO Warns Of Increased Risk Of Vector-borne Diseases In Tsunami-affected Areas

...d with increased mosquito breeding. While pools of salt water would not support mosquitoes by themselves, but once diluted by rains, they can become ideal breeding places for the malaria vector. Drinking water storage around temporary dwellings can also become a breeding place for vectors. Exposure is fur...

Study reveals new technique for fingerprinting environmental samples

...e passage of sodium, a major chemical component of salt water, were particularly abundant. As light is a major energy source for microbes living in surface water there was an abundance of genes involved in photosynthesis in samples collected from shallow water. These differences in the abundances of genes...

Road salt affects mitigation wetlands

...toring the salinity of the wetlands to see how the salt affects animals and insects. "I am currently doin...T-installed data loggers to measure the amounts of salt that enter the designated runoff wetland and one other that is slightly affected by splashover from ...

Thai spice helps cut blood sugar swings

...itute for lime, and in Ceylon it's used along with salt to cure fish. For HCA, though, the other half of the taste-benefit formula is much less clear. Animal studies suggest HCA may reduce food intake followed by weight loss, but no controlled human trials have shown either effect. Nevertheless, many peo...

Purdue scientists may have found key to halting spinal cord damage

...s more than usual. "If you took a single grain of salt from a shaker and dissolved it in a liter jug, the water wouldn't taste very salty," Shi said. "But even that would be more than a millimole, and that's much more acrolein than the body can handle at once." Because a high concentration of acrolein a...

University of Nevada, Reno research team discovers hormone that causes malaria mosquito to urinate

... harmless to animals and the environment. "Table salt is far more toxic," said Schooley, a professor of ...to excrete fluid rich in sodium chloride, the main salt in blood. "Only DH31 causes the massive loss of sodium chloride which causes the mosquito to pee,"...

Thinking the pain away? Study shows the brain's painkillers may cause 'placebo effect'

...rs to inject their jaw muscles with a concentrated salt water solution to cause pain. The injection was ma...rchers slowly increased the amount of concentrated salt water being injected in the muscle as the scans continued, in order to keep the participants' rating...

Gene therapy to lower blood pressure just enough

...he manner in which the kidney eliminates sodium or salt from the body and inhibits other systems, such as the sympathetic nervous system, believed linked to development of high blood pressure. "This makes ANP an attractive agent for use in treating blood pressure," said O'Malley. "However, its use is li...

Living with salt

...rets of its exceptionally successful adaptation to salt remained unresolved. In a recent paper published ...urfaces of carbonic anhydrases that don't tolerate salt sport a negative/positive/ neutral mix. This and other unique structural features may enable the alg...

NYU chemists use computer simulation to enhance understanding of DNA transcription

...ructures along DNA, fold into a condensed fiber as salt increases. This folding and the interplay between ...analyzed a 12-nucleosome array. Using a variety of salt conditions, the researchers found that the nucleosomal array formed irregular three-dimensional zig-...

Water management in cells

...e. A cell can regulate its volume by adjusting the salt concentrations in and around the cell. Exactly how...that play a role in this process. Increasing the salt concentration in the cell or decreasing the salt concentration around the cell leads to an influx of...

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