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Tag: "tube" at biology news

Pesticides choke pathway for nature to produce nitrogen for crops

... According to years of research both in the test tube and, now, with real plants, a team of scientists reports that artificial chemicals in pesticides – through application or exposure to crops through runoff – disrupt natural nitrogen-fixing communications between crops and soil bacteria. The disruptio...

Studies force new view on biology of flavonoids

...h flavonoids in particular, what goes on in a test tube is not what’s happening in the human body." Research has now proven that flavonoids are poorly absorbed by the body, usually less than five percent, and most of what does get absorbed into the blood stream is rapidly metabolized in the intestines ...

Cancer-killing invention also harvests stem cells

...other cells, King's group coated a slender plastic tube with selectin. They then did a series of lab expe... and in vivo using rats, with this selectin-coated tube to filter the bloodstream for stem cells. It worked, and the King Lab discovered that they could at...

Insomnia drug can improve brain function

..., unable to speak or walk, and was using a feeding tube for nourishment, although she was able to understand single words. Two years after the suicide attempt, she was given zolpidem for a bout of insomnia; 20 minutes later, she was able to communicate to her family, eat by herself, and move. These effect...

New molecular pathway could reveal how cells stick together

...w she plans to find how ninjurin affects breathing tube development, as well as the role it plays in immunity. "The immune system is all about immune cells circulating around and being able to attach to tissues that need their attention," she said. A new signaling pathway holds promise of new therapeut...

Stem cell transplants explored at Stanford as a possible treatment for hearing loss

...s possible to coax embryonic stem cells in a test tube to differentiate into hair cells - and then also to have the stem cells differentiate after transplantation in the ears of chicken embryos. The two different approaches - new drugs and stem cell transplants - are important because drug treatmen...

Why is the heart heart-shaped?

... local environment. The heart appears as a simple tube early in development; later, the tube walls bulge outward to form the cardiac chambers. In a new study published online in the open acce...

Mechanical 'artificial hearts' can remove need for heart transplant by returning heart to normal

...pump then pumps the oxygen rich blood into another tube which is connected to the aorta. Once blood is in the aorta, it can be transported to the rest of the body. Patients were treated with drugs which encourage reverse remodelling of the heart, prevent atrophy and prevent the heart from shrinking bey...

St. Jude announces breakthrough in eye cancer treatment

...in-3 to block MDMX in retinoblastoma cells in test tube studies as well as in mouse models. The molecule was originally developed by Roche Pharmaceuticals (Nutley, N.J.) for a similar use against a related target called MDM2 in adult cancer cells. The success in knocking out MDMX with nutlin-3 represent...

U of M researchers invent 'flashy' new process to turn soy oil, glucose into hydrogen

...roplets from an automotive fuel injector through a tube onto a ceramic disk made of a catalyst material--the elements rhodium and cerium--that guides the breakup of the feedstock molecules toward the production of syngas and away from water and carbon "gunk." Because the catalytic disk is porous, the syng...

Ocean seep mollusks may share evolutionary history with other deep-sea creatures

...onous brew for most species, animals such as giant tube worms and the mollusks studied by Kiel and Little thrive with the help of the symbiotic bacteria. "If you can become adapted to living at these sites, you can make a very good living indeed," Little said. The origins and age of seep citizens such as...

Motorola researchers develop selective sensors based on carbon nanotubes

... into a tube," Tao said. "Every single atom in the tube is exposed to the environment and can interact with chemicals and molecules. That is why it is so sensitive. But without the peptides, it would not recognize specific compounds." "The potential for the carbon nanotubes is extraordinary," Forzani ad...

New research to cut animal testing

... to take novel drugs straight from testing done in tube tests," said Dr Walmsley. "But if we can refine the pre-animal tests and increase people's confidence in them, then we will be able to reduce the number of chemicals that are tested on live animals." ...

MIT designs portable 'lab on a chip'

...ntly. "Instead of a thousand people pouring test tube A into test tube B in different laboratories, you've got a tiny little chip with thousands of experiments all going o...

Extraordinary life found around deep-sea gas seeps

...e video feed, the scientists observed 30?0 cm long tube worms emerging from beneath limestone boulders and...re fringed with stands of another type of deep-sea tube worm that is also gutless and relies on symbiotic bacteria for its nutrition. Corals and, at two of ...

Enzyme shreds Alzheimer's protein

...ay a role in late-onset sporadic AD. Their test tube studies showed that CatB biochemically degrades Aß by snipping one end of the protein, called the C-terminal end. What's more, the enzyme also degrades the long strings of Aß that form amyloid plaque, they found. Finally, they found that increasing...

Like a snail through the intestinal canal

... this is the colonscope, a long, thin and flexible tube that causes patients great discomfort and pain. For this reason, researchers have been trying to develop alternative medical devices, such as, for example, a small robot that moves independently through the intestinal tract. There is a layer of slime...

3-D ultrasound scanner could guide robotic surgeries

...ncluding 500 tiny cables and sensors packed into a tube 12 millimeters in diameter -- small enough to be inserted through the incisions required for laparoscopic surgeries http://www.pratt.duke.edu/news/?id=417 . The researchers then showed that the device can produce actual 3-D images of the beating hea...

Researchers find protein that silences genes

...n specificities they observed for HDA6 in the test tube fit with the changes in acetylation that occur on ribosomal RNA genes in living cells. They also found that the mechanism behind the silencing involves both modifications of histones and changes in DNA methylation, and that HDA6 affects both. Cir...

Innovative method for creating a human cytomegalovirus vaccine outlined

...s Down syndrome, fetal alcohol syndrome, or neural tube defects. Because of the dangers posed by the virus to infants, the Institute of Medicine has declared that development of a CMV vaccine should be one of the highest priorities for vaccine makers. Now, in a new study in the August 1 issue of The Jou...

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