bonds 2 2

Tag: "bonds" at biology news

Chocolate, wine, spicy foods may be OK for heartburn, Stanford study finds

... Gerson's recent findings could free them from the bonds of dietary self-denial. She is considering doing studies of her own to learn more about what effects dietary changes actually have - or don't have - on heartburn. "It probably wouldn't be that hard to recruit volunteers for a study of chocolate," Ge...

Tiny shock absorbers help bacteria stick around inside the body

...seen in the urinary tract, for instance. The catch bonds release their grip when there is little or no force on the bacteria. In new research, the scientists have learned that the mechanical properties of the bungee-like fimbriae also play a key role in the tenacity of E. coli clinging to mucousal surface...

Key stress protein linked to toxicities responsible for Parkinson's, Alzheimer's

...or aggregated proteins, rearranging their chemical bonds and thus refolding the proteins to function normally. The new research by Dr. Lipton and his colleagues shows that molecules related to the free radical NO, which is present in elevated levels in neurodegenerative diseases, attacks PDI via a chemical...

Rehydrate -- your RNA needs it

...r molecules trapped in ribozymes can form hydrogen bonds with other water molecules or with parts of the ri...ns and in the process must let go of some hydrogen bonds and form others, just as partygoers shift position and engage with other guests. "As a consequenc...

Buckyballs boost antibody's chemotherapy payload

... That happens, in large part, because the chemical bonds that are used to attach the drugs -- strong, covalent bonds -- tend to block the targeting centers on the antibody's surface. If an antibody is modified with to...

Study reveals details of mussels' tenacious bonds

...c and organic surfaces, sustaining their tenacious bonds in saltwater, including turbulent tidal environmen...can form even stronger, and irreversible, covalent bonds when it is oxidized by seawater. This helps to explain the remarkable versatility of mussels to adhe...

'Pinball protons' created by ultraviolet rays and other causes can lead to DNA damage

...sine, and each one pairs with its opposite to form bonds where the "information" of life is stored. Thus, Guanine pairs with Cytosine, and Thymine with Adenine. The team at the University of Georgia studied how the removal of a proton from the Guanine-Cytosine (G-C) base pair is involved in creating lesi...

OHSU study says stem cell 'fusion' occurs in tumors

...an increasingly popular theory that fusion is what bonds stem cells with bone marrow cells to regenerate organ tissue. Scientists in the OHSU School of Medicine found that transplanted cells derived from adult bone marrow can fuse with intestinal stem cells of both normal and diseased tissue comprising th...

New treatment for severe malaria

...hallenge facing scientists has been to break these bonds so that the infected blood cells can be transported by the blood stream into the spleen and destroyed. The research group, which is headed by Professor Mats Wahlgren, has now developed a substance that prevents infected blood cells from binding in ...

Microcapsules like it hot and salty

...supply of energy from raising the temperature, the bonds between the polymer molecules with opposite charges are loosened and as a result, the capsule wall becomes softer. The material of the shell can therefore flow closer together; the wall becomes thicker and denser. The molecules can no longer move thr...

New path from estrogen to survival in breast cancer cells described

...nction. SENP8, a protease (enzyme) that can break bonds between other molecules. SIRT1 NFkB (Nuclear Factor kappa B), a family of proteins that turn on genes involved in cell death (apoptosis) and cell proliferation. When over-expressed, NFkB can protect cells from undergoing apoptosis, and in general, th...

Uniform tungsten trimers stand and deliver

... principle, you have all the things needed to make bonds and break bonds. That's the scientific breakthrough here." Though it appears simple, the model system was challenging to develop, White said. The collaborators employed specialized equipment available from the William R. Wiley Environmental Molecul...

Uncovering DNA's 'sweet' secret

...e (T). In this "Watson-Crick" basepairing, the G:C bonds are much stronger than A:T or any other bonds. "In homo-DNA, the Watson-Crick base pairing rules are changed," Eglisaid. "For example, G:C is similar to G:G or A:A, so you have a much more versatile pairing system in homo-DNA. Therefore, the nature...

Nobel Laureate finds 'elegant' explanation for DNA transcribing enzyme's high fidelity

...y literally “trigger?the formation of the chemical bonds that link components of the growing RNA chain together. If the NTP is even slightly misaligned, Kornberg said, those critical interactions fail. The trigger loop mechanism therefore couples NTP recognition and catalysis, ensuring the fidelity of tr...

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

...o usable fuels has been breaking down the chemical bonds in cellulose--the material that gives plant cell w... But the high heat of the new process breaks those bonds with ease, meaning cellulose and similar plant materials can possibly be used as feedstocks. Schmi...

A sweet step toward new cancer therapies

...ometer and fragmented by heating until the weakest bonds break. "It's the 'shake-it-til-it-breaks' approach..."If sugars are attached, for instance, the weakest bonds are not the bonds that hold the protein together; they're the bonds between the sugars," Hakansson s...

Meat and two neutrons -- the key to a longer life

...attack. The isotopes replace atoms in susceptible bonds making these bonds stronger. 'Because these bonds are so much more stable, it should be possible to slow down the proce...

Lead with a poisonous electron shield

...can enter into complexes in which the metal–ligand bonds can either point in all directions, or into only one hemisphere, while the other hemisphere is filled by the free electron pair. This observation may help in the design of future lead-specific antidotes....

Freeze! Scientists film proteins at work by freezing them at different states

... the appropriate ones by showing them the chemical bonds in each stage of the reaction. Once they had identified the right states, they studied the sample with synchrotron x-rays. “We expect this new methodology to be of use for many researchers in the field? Bourgeois explains. Filming certain proteins...

Chemical switch triggers critical cell activities

...ply, according to the researchers. These thioester bonds are chemical links between two biological molecules that form when a sulfur atom on one of the molecules binds to an atom that is part of the other molecule. Understanding how the thioester bond switch works is important not only because it expla...

1 2 3