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Tag: "attach" at biology news

Motorola researchers develop selective sensors based on carbon nanotubes

...ompounds," Tao said. "We developed a simple way to attach different peptides to different nanotubes." Erica Forzani, an ASU assistant research professor in electrical engineering, said the peptides are selective to specific compounds. In the heavy metal tests, the researchers developed a peptide to detec...

Electric jolt triggers release of biomolecules, nanoparticles

...r a group of molecules is released, you can easily attach new molecules to an electrode and use it again." Earlier this year, Searson, Mali and Bhattacharjee reported on their technique in the journal Nano Letters. A patent on the process is pending, and licensing inquiries are being handled by the Johns ...

Nanoparticle assembly enters the fast lane

...f single-stranded DNA, which can bend backward and attach to the particle's gold surface instead of binding with surrounding nanoparticles. This flexibility, along with the existence of multiple forms of single-stranded DNA, can greatly slow the assembly process. In the Brookhaven study, researchers introdu...

First biomarker for human sleepiness identified in fruit flies

...eep deprivation's effects on the brain has been to attach electrodes, which can be a bit awkward when your target is a killer whale. Hopefully the markers we develop will make these kinds of phenomena much easier to study." ...

Regulating the nuclear architecture of the cell

...stones in the nucleosomes. Su(var)3-9 proteins attach methyl groups to the histone labeled H3 at its ninth amino acid residue, which is a lysine. In the histone code the methylation target is known as H3K9, where K stands for lysine. Methylation of chromatin causes it to condense. Another Su(var) ge...

Cocaine high caused by interference in neuronal receiving stations

...bunit of dopamine receptors, called D2R, tended to attach to the NR2B subunit and was responsible for preventing the normal activation of the glutamate receptor. Such activation normally involves addition to NR2B of a molecular group called a phosphate by an enzyme called a kinase, and the cocaine-induced D...

Molecules in blood foretell development of preeclampsia

..., but enough free VEGF would still be available to attach to cell surface receptors to promote the health of blood vessels. Dr. Levine cautioned, however, that such attempts to develop a drug treatment would need to proceed cautiously. It's possible that restoring normal blood pressure and blood flow to ...

Who gives stem cells their marching orders?

...p showed that embryos already need Nodal when they attach to the wall of the uterus, to expand their pool of stem cells, and to let individual cells know where they are with respect to their neighbors. However, to carry out these tasks, the Nodal protein must be cleaved by specific enzymes. The enzymes act ...

'Protecting virus' offers instant flu protection and converts flu infections into their own vaccines

... so that white blood cells produce antibodies that attach to the surface of the virus and start the process of killing it. This works well for many diseases, such as smallpox, polio and measles, but is much less effective with influenza, as the coat of the flu virus is continually changing. Vaccination ag...

New clues to how sex evolves

...his activity is reminiscent of the way chromosomes attach to the nuclear envelope during meiosis in other or...gans it's the Pairing Centers, not telomeres, that attach to the nuclear envelope. They do so seemingly randomly, not in a single bunch; nevertheless, the ass...

New findings could lead to vaccine for severe malaria

...n red blood cells, where it produces proteins that attach themselves to receptors in the wall of the blood vessels. This causes the red blood cells to accumulate in organ capillaries, and gives rise to life-threatening symptoms. Adults who have been infected several times can become partly immune as their d...

New approach to BSE successful in lab

.... There are types of RNA known as siRNAs which can attach themselves to specific genes, thereby preventing these from being ‘read? The production of the appropriate protein is thus shut down. This effect is known as RNA interference; its discovery was rewarded with this year’s Nobel Prize for Medicine. “We ...

Stress hormones may play new role in speeding up cancer growth

...a role in breaking down the scaffolding that cells attach to in order to maintain their shape. The third compound, vascular endothelial growth factor (VEGF), is important in the growth of new blood vessels into tumor cells. Earlier work by researcher Anil Sood at the University of Texas had shown that th...

Widely used iron nanoparticles exhibit toxic effects on neuronal cells

...tly to a tumor. Magnetic nanoparticles designed to attach to cancerous tissue can also be made to heat up by using a remote, alternating magnetic field, thereby selectively killing cancer cells in a process called magnetic hyperthermia. Many researchers throughout the world are also studying the use of ...

DNA layer reduces risk of reserve parts being rejected

...ting. A method therefore had to be found to firmly attach the DNA to the implant surface. Van den Beucken used the Layer-by-Layer deposition technique (see Figure 1) to produce a multilayer coating. This coating was tested in cell cultures and animal experiments for its safety, immune response, bone attachm...

Targeting tumors the natural way

...iving systems instead involves binding agents that attach only weakly to any single target receptor, and thus stick to cells only when several receptors are displayed together. These weak "multivalent" interactions cut down on cases of mistaken identity, because if the agent contacts the wrong cell type, it...

MIT biologists solve vitamin puzzle

... don't require B12 to survive, and the plants they attach themselves to don't need it either, so he speculates that synthesizing B12 may enable the bacteria to withstand "challenges" made by the plants during the formation of the symbiotic relationship. More than 30 genes are involved in vitamin B12 synt...

Bacteria research offers hope for new vaccine against meningococci

...ia cells use to adhere to the receptors) could not attach to mucous linings. Thanks to the new system the research team has developed, it is now possible to rapidly and effectively monitor the function of various vaccine candidates and new drugs, obviating the numerous costly and time-consuming tests tha...

Walking molecule now carries packages

...n a flat surface. Now this team has found a way to attach cargo: two CO2 molecules, making the nano-walker a molecule carrier. The work will be published Thursday, Jan. 18 in "Science Express" and later in the print-version of the journal "Science." "This is an unprecedented step forward towards the re...

Studies yield insight into the numerical brain

...d neural representations," they wrote. "Perhaps we attach meaning to symbols by physically linking populations of neurons sensitive to symbol shapes to preexisting neural populations holding a nonsymbolic representation of the corresponding preverbal domain (e.g., numerosity)." In the other paper in Neuro...

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