Tag: "breaks" at biology news
Emory chemists develop bacteria that may help decaffeinate coffee
...e plant, caffeine is synthesized very quickly, but breaks
down to theophylline very slowly. "We know that there is an enzyme that breaks
caffeine down into theophylline, but we don't know much about it," says Gallivan, an assistant profe...
Purdue chemists give an old laboratory 'bloodhound' a sharper nose
...d. "Just like a strong wind kicks up dust, the gas breaks
off a few small particles of the unknown substance, and these combine with the reactive chemicals to form an ionized compound that a mass spectrometer can analyze right then and there. It can be done anywhere, and because there are fewer intervening ...
ORNL system eliminates perchlorate, helps scientists trace source
... or impractical. The ORNL system removes and breaks
down perchlorate into harmless chloride and water and recharges the resin so it can be reused many times. The process costs up to 80 percent less than conventional methods and is one of R&D Magazine's top 100 inventions for 2004. But Gu and ORN...
Researchers unlock mysteries of toxic metals in the largest contaminated site in United States
...te, which is plentiful throughout the mining area, breaks
down in weathering environments from sulfides to sulfates then reforms to sulfides in the stream, taking up heavy metals as it crystallizes. "These are extremely tiny crystals, a couple of nanometers, and are very reactive," Hochella said. "It allo...
Initial sensor for p53 tumor-suppressing pathway identified
PHILADELPHIA - DNA breaks
from radiation, toxic chemicals, or other environm...ed, can lead to cancer-causing mutations. When the breaks
cannot be repaired, and the cell is vulnerable to becoming cancerous, critical backup protection gov...
Old riverbed keeps chemicals from entering Ohio River
...which this rapid linkage to the groundwater system breaks
down? Krissek asked. Krissek has no...ll does consulting work for the company during his breaks
from the university. ...
New tool highlights activity of key cellular signal
...tein called PKA. Once activated by cyclic AMP, PKA breaks
in two, separating its two fluorescent "caps." The first all-protein fluorescent version of PKA was developed a few years later. But the PKA-based probes, which Zhang used as a postdoctoral fellow at the University of California San Diego, were...
Researchers discover defense mechanisms in some plants believed bred out by humans
...en an insect starts gnawing at the young maize, it breaks
the cell compartments. The enzyme beta-glucosidase breaks
the DIMBOA-glucoside down into glucose and DIMBOA, and the DIMBOA is toxic to insects. However, 14 o...
Forensic clock calls time on crime
...chnique that measures how quickly genetic material breaks
down could change that. DNA profiling is now a ubi... forms of RNA. They discovered that messenger RNA breaks
down faster than ribosomal, or rRNA, so it is possible to work out when a sample was deposited by me...
DNA breaks and genomic instability: Broken ends stick together
...ek report findings that offer new insight into how breaks
in chromosomes can lead to the so-called genomic i...or improperly fused chromosomes lead to chromosome breaks
in mitosis and disruptions in gene activity that can lead to cancer. Unfortunately, the molecular ev...
Study in Royal Society journal on first evidence for magnetic field detection in sharks
...that secrete an enzyme into their environment that breaks
down the antibiotic ampicillin, thereby protecting nearby cells. Our findings demonstrate that cells that would normally die in the presence of ampicillin can maintain themselves at low frequencies when in the presence of cells that produce the ampic...
Femtosecond laser technique opens new opportunities for research on neural regeneration
... focused, the energy delivered by the laser pulses breaks
down chemical bonds at the targeted site, vaporizing the tissue within a tiny volume without causing side effects such as heating of surrounding tissue, Yanik said. The duration of the laser pulses used in the study was 200 femtoseconds (a femtoseco...
Stowers researcher publishes DNA double-strand break repair discovery in Science
...c. 17 issue of Science . "DNA double strand breaks
are regarded as one of the primary causes of cancer," says Kusch. "While there are natural mechanisms within an organism to detect and repair these breaks, factors involved in DNA damage repair must first bypass histones. Histones are proteins that c...
DNA movement linked to formation of antibody genes
... Hermes cuts away from donor DNA via double strand breaks
and that the ends of the element then join to the target DNA. Unlike other transposable elements, hairpin intermediates are formed at the ends of the donor DNA rather than on the ends of the element itself. This also occurs during V(D)J recombinati...
Scientists decipher genome of bacterium that helps clean up major groundwater pollutants
... Pseudomonas putida , a soil bacterium that breaks
down organic pollutants. Deinococcus radiodurans , a radiation-resistant bacterium that can be used to help bioremediate radionucleotides at radioactive waste sites. Caulobacter crescentus , which could be used for bioremediat...
A new New Year's reason to work out: Exercise improves three measures of heart protection
...n activator (TPA), an enzyme made by the body that breaks
up blood clots, was higher in physically fit women compared to unfit women. Plasminogen activator inhibitor-1, a blood substance that inhibits TPA, was lower in physically fit women. And, a marker that indicates blood clot activation -- prothrombin...
Mouse brain cells rapidly recover after Alzheimer's plaques are cleared
...ar function. Holtzman suspects that this transport breaks
down in the mice, leading to pileups that become swellings. Scientists have previously demonstrated that such swellings make it difficult or impossible for nerve-cell branches to send signals. After showing that the swellings were mostly stable in nu...
Recognizing new aneurysm syndrome can save lives
...biggest blood vessel. In these patients, the aorta breaks
at a much smaller size than it does in people with Marfan syndrome or other causes of aneurysm, making identifying these patients critical, the researchers report. "The severity of the physical traits can vary, but because the aorta ruptures so much ...
Increased risk of osteoporosis associated with gene that one in five people have
...enzyme that detoxifies foreign substances and also breaks
down estrogen as a normal part of maintaining prop...ular variation of the gene produces an enzyme that breaks
down estrogen faster than usual, leading to low serum estrogen levels and high levels of estrogen me...
New stem cell source could boost bone marrow success
...losed and suspended in collagenase, an enzyme that breaks
down the Wharton's Jelly around the vessels to release the cells inside. The HUCPV cells were then isolated and cultivated in vitro. Many parents already freeze the cord blood cells containing hematopoietic stem cells, but U of T professor Bill Stan...
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