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Tag: "bonds" at biology news

Elephants imitate truck noises, other animals

...lso occur in other species where long-lived social bonds are based on individual relationships and where members of a group separate and reunite over time." The study was funded by the Woods Hole Oceanographic Institution. ...

Elephants imitate sounds as a form of social communication

...lso occur in other species where long-lived social bonds are based on individual relationships and where members of a group separate and reunite over time." ...

Duke Chemists Isolating Individual Molecules Of Toxic Protein In Alzheimer's, Parkinson's Disease

...he tip can induce a measurable tug on the chemical bonds that hold together the two elevated monomers. By pulling on such bonds, the Duke scientists can deduce how much energy was required to bring the molecules together. Then, using their knowledge of protein chemistry, they can develop hypotheses about ...

Tiny scaffolding allows stem cells to become working fat cells

...a mat that resembles the intracellular matrix that bonds cells together in normal tissue. The fibers are about the size of a collagen fiber, several nanometers (a billionth of a meter) across, and provide tensile strength to support the growing tissue," Kniss said. The researchers then "seeded" that scaff...

Spiders help scientists discover how muscles relax

...stead. When muscle is activated, they suggest, the bonds between the myosin heads are broken. This frees each head to interact with actin and cause muscle contraction. "We have focused on the relaxed muscle to understand the structure of the thick filaments when they are not involved in contraction, but ...

Redesigned protein accelerates blood clotting

...calcium ions (calcium binding sites). When calcium bonds to it, factor VIII changes shape and becomes better able to bind factor IX. In past research, Fay's team had identified a single amino acid (out of the more than 2,300 building blocks making up factor VIII) with the potential, if replaced, to change...

Beetle-inspired switch uses water for bonding

...switch that uses water droplets to create adhesive bonds almost as strong as aluminum by borrowing a mechanism found in palm beetles. The new beetle-inspired switch, designed by Cornell University engineers, can work by itself on the scale of a micron -- a millionth of a meter. The switches can be combin...

Fundamental discovery -- Bone fracture

... in abalone shells. This glue involves sacrificial bonds (with hidden length) that uncoil when the bone is stressed." That interdisciplinary research group included the research groups of Morse and Stucky, as well as that of Herbert J. Waite. Said co-author Daniel Morse, director of UCSB's Institute for C...

Rodent social behavior encoded in junk DNA

...angers more readily and were more apt to form pair bonds and nurture their young. "If you think of brain circuits as locked rooms, the vasopressin receptor as a lock on the door, and vasopressin as the key that fits it, only those circuits that have the receptors can be 'opened' or influenced by the hormo...

Progress on HIV/AIDS significant but insufficient

...ng very vulnerable populations, and tightening the bonds between sex, hygiene and procreation programmes. The round table devoted to treatment had reaffirmed the urgent need to expand treatment programmes, he said. Considerable difficulties still hampered the attainment of that objective, including the la...

New molecule may aid in production of biofuels and fungi-resistant plants

...ases have quite a challenge. In order to break the bonds between the sugar units, they must gain access to the bonds by somehow disrupting the packing of the sugar chains in the chitin molecule. How exactly chitinases...

Scientist uses form to explain function of key building blocks of life

...h unprecedented accuracy the strengths of hydrogen bonds in a protein. The scientists were then able to pr...he proteins, to determine the strength of hydrogen bonds in ten different variants of the protein. From that data, the team was able to explain changes in p...

Cellular scale drug delivery from the inside out

... in much higher concentrations and would break the bonds on the caps and release the drugs. In this way, only cancer cells could be targeted with powerful chemotherapy drugs such as Taxol or doxorubicin, while the nanospheres inside the normal cells would remain capped and therefore not cause unwanted side...

MIT chemist discovers secret behind nature's medicines

... case a methyl group. They break specific chemical bonds and then replace a hydrogen atom with a halide, one of the elements from the column of the periodic table containing chlorine, bromine and iodine. In the lab, that's a very challenging task, but nature accomplishes it almost nonchalantly. The trick i...

New nano-canary in the nanotoxicology coalmine: The body itself

...spectroscopy measures a broad spectrum of chemical bonds and will provide information that is complementary to genomic and proteomic approaches. FTIR spectra are captured in minutes in live cell studies, offering a tool to rapidly detect whether nanoparticles are biologically active. This information can...

Attention shoppers: Researchers find neurons that encode the value of different goods

...joying more leisure time, or choosing to invest in bonds or in stocks. Such choices have long been studied by economists and psychologists. In particular, research in behavioral economics shows that in numerous circumstances, peoples' choices violate the criteria of economic rationality. This motivates a c...

Creation of antibiotic in test tube holds promise for better antibiotics

... how just one protein (NisC) makes 10 new chemical bonds in a stereochemically defined fashion. Specificall... amino acids and provide sturdy protease-resistant bonds at precise locations. They account for nisin's robust resistance capability. It was theorized that o...

Molecular force field helps cancer cells defend against attack

...n their armor. The cells churn out an enzyme that bonds with a protein, creating a protective barrier that deflects damage from radiation or chemotherapy and promotes tumor cell survival. But in laboratory experiments, UF scientists were able to block the union, and the malignant cells died. The findings ...

Stable polymer nanotubes may have a biotech future

...es_Animation.htm .) A chemical was added to break bonds between atoms in one section of the polymers and induce new bonds to form between the two different sections, forming a rigid "cross-linked" membrane. The nanotubes a...

New weapon in battle against osteoporosis

...e treated these mice with an active substance that bonds specifically to the CB2 receptor. In this way we were able to diminish the bone loss caused by ovary removal," explains the molecular biologist. Many patients carry a particular variant of the CB2 gene But how far can these results be applied t...

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