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Tag: "charged" at biology news

Researchers add to understanding of how brain cells communicate

...ds on specialized molecular receptors that conduct charged particles, or ions, between the outside and inside of cells. Ions also modify how receptors work. In this paper, Johnson and Qian studied the effects of ions on receptors and found them to vary between different types of receptor molecules. They used...

New biochip helps study living cells, may speed drug development

...rks by measuring the concentration of ions -- tiny charged particles -- as they enter and exit cells. The chip can record these concentrations in up to 16 living cells temporarily sealed within fluid-filled pores in the microchip. With four electrodes per cell, the chip delivers 64 simultaneous, continuous s...

Too mellow for our predatory world

...nsidering raising the entry fee from the currently charged $100 to $500 in order to reduce the number of visitors - possibly the only possibility to create sustainable tourism, thereby ensuring the necessary protection of the unique animal and plant world of the Galápagos....

Mars mission Risk 29: Scientists research ways to reduce radiation-induced brain damage

...oratory, Berkeley, Calif., comparative analysis of charged particle-induced autosomal mutations in murine tissues and cells Bernard Rabin, University of Maryland, Baltimore County, Baltimore, neurochemical and behavioral effects of exposure to heavy particles John Redpath, University of California Irvi...

Mass vaccination unnecessary in the event of a large bioterrorist US smallpox attack

..., if so, how. Specifically, the researchers were charged with determining whether surveillance and containment ?isolation of detected smallpox cases and vaccination of their close contacts ?would be sufficient to contain a large attack. They also wanted to find out whether other interventions, such as mass...

Using nature's most primitive anti-viral defense system to find new approaches to cancer research

...oundaries of science, and Dr Baum and his team are charged with tackling one of the greatest scientific challenges of all."...

New technique boosts size of proteins that can be analyzed

...spectrometer, which measures the masses of ions or charged particles. Researchers break up the protein into pieces and weigh both the masses of the whole protein and of the individual pieces. By matching the weight of the whole protein and its pieces with those of known protein sequences in a database, they ...

Tarantula venom and chili peppers target same pain sensor

..., the receptor channel opens, allowing a stream of charged sodium and calcium molecules to rush into the nerve cell. This generates an electrical signal that travels to the brain to produce pain. The researchers examined venoms from 22 spider and scorpion species whose bites are known to cause pain. Venom...

Weighty viruses

...an “ion trap? This is an electric field that holds charged particles prisoner by means of its special geometry and alternating voltage. Once trapped, the virus particles are ready for mass determination. Laser light is beamed into the ion trap. If a particle is present, it scatters the light. The scattered l...

ASU researchers test antibacterial effects of healing clays

...ing an octahedral core. The "peanut butter" is the charged cations, for example, potassium, that stick to the negatively charged tetrahedral ring surface. And the jelly? Organic compounds or other species of any or no charge are ...

Faster, low cost sequencing technologies needed to drive era of personalized medicine

...bill -- to the current tune of $10 million or more charged for every human or mammalian-sized genome sequence...ology with engineering. The researchers have been charged with the daunting task of shrinking down the 13 year, $2.7 billion Human Genome Project to days. ...

DNA layer reduces risk of reserve parts being rejected

...le layers with opposite charges. Step 1 positively charged particles, Step 2 washing stage, Step 3 negatively charged particles (DNA), Step 4 washing stage. Click on the image for a larger version More possibilitie...

New synthetic self-assembling macromolecules mimic nature

...The early results of this study suggest that these charged polymers self-assemble by like-charge interactions similar to such natural polymers as DNA," said Turner. "The stable self-assembled structures could have potential applications in drug delivery and gene delivery systems." But more immediate, "The...

Einstein's tea leaves inspire new blood separation technique

...ting ions around its tip that repel the oppositely charged ions close to it. This creates an airflow known as "ionic wind" that sweeps across the surface of the blood, causing it to circulate. The microscopic particles in the blood travel in a downward spiral because of the needle's angle relative to the sur...

Dual gene therapy suppresses lung cancer in preclinical test

...articularly in the tumors, Ji says. The positively charged nanoparticles are delivered to the negatively charged cancer cell membrane and taken into the cell, where the genes repeatedly express either p53 or FUS1 ...

Shedding new light on proteorhodopsin

...like a capacitor. If a capacitor is already fully charged and you connect a battery to it nothing happens. However, if you drain the capacitor and then connect a battery, a current will flow." To observe proteorhodopsin in action and measure its effects, Liphardt and his co-authors genetically engineere...

Rapid, Low-Cost DNA Testing

...ly different affinities for attaching to ionically charged gold nanoparticles. Because ions have electric cha...charges. Single-stranded DNA adsorbs on negatively charged citrate ions on the gold nanoparticles while double-stranded DNA does not. Given that both single-st...

A new study of living cells could revolutionize the way we test drugs

...vidual biological cells must transfer electrically charged particles, called ions across their cell membranes. This flow produces an electrical current that could, in principle, be detected with sensitive enough equipment. The recognition of such electrical activity would provide a kind of ‘cellular cardiogr...

Row over study puts Korea's scientific community under scrutiny again

... on the disputed paper, Dr Sook Hwan Lee, has been charged with criminal copyright infringement. Dr Kim told the BMJ that the paper had begun life as his PhD thesis and that there were just two names on it when it was published by Korea University in May 2003. He then submitted this as a paper to the Kore...

Researchers examine carbon capture and storage to combat global warming

...discouraging carbon emissions. Carbon taxes are charged to a company for every ton of carbon dioxide it emits, so that it becomes increasingly costly to be dirty. Thus the taxes encourage companies to be green. When a clean technology is expensive-incorporating carbon capture and storage into a power p...

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