Tag: "ions" at biology news

New Ultrasensitive Technique For Accurately Characterizing Biomolecules Is Developed By Cornell Chemists

...ample's ionized molecules in the gas phase. These ions continue into the mass spectrometer, which is a sophisticated weighing machine. Using a spectrometer with a 6.1 Tesla superconducting magnet, the Cornell team took a sample representing 1 percent of the protein in a single red blood cell and correctl...

New Software Provides Quick Analysis of ion-Channel Activity

...ible. An ion channel can pass more than 1 million ions per second,' Sachs said. That's a big enough output to measure in real time. The programs allow you to not only "watch" an ion channel molecule at work, they provide specific quantitative results on how it works, on how fast protein molecules change ...

Merging Physics And Neuroscience: First Evidence Of Self-Organized Criticality In Brain Networks

...cytes, whose normal task is to regulate theflow of ions and neurotransmitters in the neuronal cells thattr...pagation of a spiral-like wave of calcium andother ions throughout the network. The spontaneous formation ofcalcium waves is controlled by the amount of ka...

Scientists Find New Trigger For Nerve Cell Death

...important as changes in calcium. Potassium ions cross the cell membrane through tunnels called pot...ink into oblivion. "Ashrinking cell must be losing ions and water," Yu says. Potassium seemed like the obvious ion to escape because there's so much...

New Chemical Processing Technique Being Studied At UW May Hold Key To CleaningUp Hanford, Reducing Industrial Waste

... acts like a sponge for positively-charged calcium ions in hard water. Eventually, however, the ion exchange material becomes filled with calcium and must be regenerated by a series of chemicaltreatments. A concentr ated salt-water solution is used to remove the calcium and replace it withsodium, which is...

DNA Used To Create Self Assembling Conducting Wire: Breakthrough Will Lead To Next Leap In Emerging Nanoelectronics

... up ofsilver atoms with a net positive charge. The ions arrange themselves along theDNA, attracted there b...ical called a reducing agent to convert the silver ions into stable,electrically neutral grains of silver metal. The grains of silver are then usedto cataly...

PEBBLEs Help U-M Scientists Open A Window On Cell Chemistry

...hey can detect subtle changes in concentrations of ions and small molecules. "PEBBLEs are self-contai... learn exactly how these toxins trigger a flood of ions in and out of cells, we may be able to speed up development of antidotes or countermeasures for leth...

ACS Conference Brief: An Innovative Molecular Assembly

...food,carry drugs to tumor sites, or filter uranium ions from nuclear wastewater.The challenge is in designing and building them. UC Davis researchers have been exploring two molecules of particularinterest -- calixarene and porphyrin, which has a sensitivity to light thatcan be manipulated by changes in ...

Interdisciplinary Method Offers New Way To Study Ribozymes

...ear evidence for inner-sphere coordinationof metal ions to the non-bridging sulfur at the cleavage site," Lusaid. "More importantly, our results further show that this directcoordination is responsible for mercury's ability to support phosphorothioateribozyme activity." The phosphorothioate approach has...

Cystic Fibrosis Gene Protects Against Typhoid Fever

...dren, abnormal CFTRblocks the movement of chloride ions and water in the lungs, gastrointestinal tract, and other tissues and causes them to secretelarge amounts of mucus. As mucus accumulates in their lungs, these childrenbecome increasingly susceptible to life-threatening respiratory infections. Infect...

Biggest Acoustics Meeting Ever

...s bubblesthat implode and generate highly reactive ions known as free radicals. The free radicals can then attachthemselves to chemicals in the tank, and initiate chemical reactions. Scientists envision that sonochemistrycan become an environmentally friendly approach to cleaning up waste by using sound t...

Researchers Discover Novel Gene Family Responsible For Pacemaker Activity In Brain And Heart

...siological stimuli andallow the positively charged ions sodium and potassium to cross the cellmembrane and initiate an electrical impulse. Specifically, these pacemakerchannels keep a stimulated cell active when it would otherwise return to aresting state. "A pacemaker channel senses that a cell ...

New Method To Detect Metals Could Help Scientists

...ety, explains a newtechnique to measure free metal ions more quickly and accurately than everbefore. This ...a hand-held instrument, Thompson said. Free metal ions are nutrients for plankton in the ocean, but toxic to someshellfish, and speculation has been that m...

Stargazer Gene Provides New Clues To Calcium Channel Defects In Absence Epilepsy

...l operation, the calcium channel "funnels" calcium ions to thenerve to trigger the release of neurotransmi...ive channel may allow excessive amounts of calcium ions to flow into thenerve, which leads to abnormal firing of neurons. Cacng2 is the most recent ...

University Of Washington Scientists Discover A Gene That Causes Deafness And Dizziness In Mice

...addler" mice lack a protein that transportscalcium ions across the plasma membranes of the hair cells. The hair cellstransduce sound and control balance in the auditory and vestibular systems ofthe inner ear. The research is published in the August issue of Nature Genetics. Based on the fa...

Gritty Research Leads Scientists To Metal-Loving Discovery

... large surface area for selectivetrapping of metal ions in solution," Liu said. "In fact, a mere tablespoon of this material in powderform has the surface area equivalent to that of a football field." Upon release in water, demonstrations have shown that SAMMS quickly immobilizes thetargeted metal, reduc...

University Of Texas Southwestern Researchers Find Genetic Switch That Explains Effect Of Exercise On Muscles

... jogging for example, the concentration of calcium ions isincreased within the muscle cell. When the calcium level stays high for asustained period of time it turns on calcineurin, which modifies NFAT so that itmoves from the cytoplasm to the cell nucleus. Once NFAT reaches the nucleus, itpartners with...

Penn Researchers Prove "Short-Cut" Function Of Myelin Sheath Channel: BetterUnderstanding Of Myelin Should Lead To Therapies For Neuropathies

... "These channels provide a radial path for ions and small molecules thatwe believe is a thousand t... the mutations affect the sheathand the passage of ions through gap junctions." So far, the team has been ableto express in transgenic mice both normal and ...

Envisioning Ions With INEEL-Developed Simulation

...eauty lies in its intuitiveness. The program makes ions coursingthrough electromagnetic fields as easy to ...ndsa comfortable viewing perspective, and lets the ions fly. The simulated ions, whose "flight" paths the user can trace mimic real ions inside a massspect...

Researchers Link Gene Defects To The Course Of A Deadly Form Of Heart Disease

...n the tiny channels that allowelectrically charged ions to flow in and out of the cells. Thisflow of ions is crucial to the proper contraction of the heartmuscle. When the gene that carries the blueprint f...

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