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Tag: "intestines" at biology news

Studies force new view on biology of flavonoids

...nto the blood stream is rapidly metabolized in the intestines and liver and excreted from the body. By contrast, vitamin C is absorbed 100 percent by the body up to a certain level. And vitamin C accumulates in cells where it is 1,000 to 3,000 times more active as an antioxidant than flavonoids. ...

Salmonella survives better in stomach due to altered DNA

... of DT104 on the other hand are only active in the intestines where the infection takes place. Evolution of the pathogen The DNA of the pathogen says something about how it survives and is transmitted. When a pathogen reproduces, the DNA can change a bit and this can lead to changes in the genetic cha...

Researchers develop technologies to devour food pathogens

...ince E. coli, or Escherichia coli, is found in the intestines of warm-blooded animals, it does not naturally contaminate most produce. Therefore, following more stringent sanitary policies, as well as practicing better manure and water management, can go a long way to help prevent future outbreaks, Linton said....

From hot springs to rice farms, scientists reveal new insights into the secret lives of archaea

...rchaea even inhabit the warm, dark environs of our intestines and mouth. While extremophiles have been the subject of intense research, scientists are just now beginning to focus on the large number of archaeal species that inhabit more mundane environments, including soils and seawater. At 1:30 p.m. PT M...

Dragonfly's metabolic disease provides clues about human obesity

...suggests that the study of microbes found in human intestines may provide a greater understanding of the root ca...out what role microbial communities found in human intestines may play in human metabolic disorders like insulin resistance, type-2 diabetes, and obesity. In mam...

Dinosaurs -- stones did not help with digestion

...n the food. Possibly, the scientists conclude, the intestines of the sauropods were formed in such a way that the food was retained there for a very long time, in order to improve the digestive process. There is another group of dinosaurs, however, whose remains of gastric stones can be linked up with a bird...

Like a snail through the intestinal canal

...rom TU Delft based on this research subject. The intestines are an extremely difficult area to navigate through with a medical device. Yet, many people need to have intestinal examinations done to determine if, for example, they have intestinal cancer. The medical device currently used for this is the colonsc...

For super-obese patients, duodenal switch beats gastric bypass

...ch to make overeating difficult, and rerouting the intestines to reduce the absorption of calories. The duodenal...uch but makes even more drastic alterations to the intestines to limit absorption, particularly of fats and starches. This study involved 350 consecutive supe...

Toxic molecule may cause most common type of muscular dystrophy

...ells, in the heart and brain, in the lining of the intestines and in the lens and muscles of the eyes. ...

Wisconsin scientists find a way to make human collagen in the lab

..., the biodegradable sutures made from cow or horse intestines and used in surgery to minimize scarring, is also a form of collagen. But for such a commonplace and useful protein, collagen has defied the efforts of biomedical researchers who have tried mightily to synthesize it for use in applications ranging f...

A little telomerase isn't enough

...nd those in the digestive system that maintain the intestines can't divide as many times as they should and die early. Because sperm and egg arise from stem cells, too, their telomeres gradually shorten, and each successive generation starts out with chromosomes whose telomeres are even shorter than their par...

Living anti-HIV gel shows early promise

...am showed that the modified bacteria colonised the intestines and vaginas of mice for periods of weeks to months, without causing any signs of disease. Furthermore, the modified bacteria produced large quantities of the HIV-blocking protein. The reproductive and intestinal tracts are prime sites for HIV infect...

Marine bacterium suspected to play role in global carbon and nitrogen cycles

...ocations including the oceans, hot springs, animal intestines and the human mouth. Archaea have primarily been associated with extreme environments like hot springs and deep-sea vents, but about a decade ago molecular studies proved their abundance in more common environs including the open ocean, freshwater a...

Immune system's distress signal tells bacteria when to strike back

... is often a long-term bowel tenant, colonizing the intestines of about three percent of healthy people. In the bowel this germ is usually harmless, but it can turn deadly, causing gut-derived sepsis. It is also a frequent cause of infections after major surgery. Physicians have theorized, said Alverdy, that g...

Precise Timing Enabled Pig-to-rat Transplants To Cure Diabetes

...ed into the omentum, a membrane that envelopes the intestines and other digestive organs. When the primordia mature, they replace the missing rat insulin with pig insulin, returning the rats' blood glucose to normal levels. "The absence of a need for immune suppression after transplanting from one species to a...

NSAID drug protects against intestinal tumors in mice, despite poor diet and gene losses

...nts developed tumors in both their small and large intestines when fed a Western-style diet. "This showed that the diet overwhelmed any protective effect the p27 genes conferred," says Yang. "It not only increased tumor size and number, but also pushed the cancer into an invasive state." Finally, they examine...

UCSD discovery may help extend life of natural pesticide

...hich Bt attaches, or "binds," in the lining of the intestines of insects and roundworms. The molecule is a glycolipid--a lipid attached to a tree-like arrangement of sugars. Because changes in the sugars impact Bt's ability to bind, the researchers believe that their discovery will make it possible to develop b...

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