Tag: "membranes" at biology news

Two Max Planck researchers recieve the Louis-Jeantet Prize for Medicine 2003

.... The architecture of the cell is made of numerous membranes and protein complexes which, until recently, were impossible to visualise at high resolution in three dimensions. Scientists either took two-dimensional images of thin slices by electron microscope or they disintegrated cells in order to isolate and ...

Endangered northern right whales exposed to paralytic shellfish poisoning

... are potent sodium-channel blockers in muscles and membranes and affect nerve function. Initial symptoms of PSP toxicity include parethesia and numbness and a weakening of muscles. In high doses, the PSP toxicity syndrome in mammals is characterized by respiratory difficulties, which may cause death in the abs...

Purdue works to transform Ebola virus from killer to healer

... only proved effective at attaching itself to cell membranes but also delivered its genetic payload more efficiently. "We managed to cut more than 25 percent of the string and found the retrovirus would transfer genes even more effectively than one with a 'natural' Ebola coat," Sanders said. "We now have a ve...

Is there a common genetic link for depression and cardiovascular disease?

...oteins. G-proteins are located within the cellular membranes and are thus key elements for the signal transduction, as they induce a cascade of cell reactions after the incoming signal. Thus alterations in the function of these G-proteins could have tremendous effects upon rapidity and quality of the nervous s...

Organic & Biomolecular Chemistry

...ort of sodium or potassium chloride across vesicle membranes using a ditopic salt-binding macrobicycle Bradley D. Smith, Notre Dame, USA From central to planar chirality, the first example of atropenantioselective cycloetherification Jieping Zhu, CNRS, France Articles Bisubstrate inhibitors for the enzy...

First awards for FIC global health research initiative program for new foreign investigators

...enes and risk of pre-term premature rupture of the membranes (PPROM), a major cause of pre-term birth and perinatal mobidity and mortality. Dr. Ferrand was a Fogarty fellow under the International Maternal and Child Health Research and Training Program at the University of Pennsylvania; Dr. Esteban Fridman, ...

Structure of pain-modulating enzyme described by scientists at the Scripps Research Institute

...fatty signaling molecules that reside in the lipid membranes of CNS cells. The TSRI group reports that FAAH mod...m of action whereby it scoops them out of the cell membranes and chews them up. "I envision that if someone could make a specific inhibitor to FAAH, you could, i...

Artificial cell gets light-powered nanopump for calcium ions

...ipids (similar to the lipid bilayers that form the membranes of living cells), the team created "shuttle" molec...cell. "The concentration of ions inside biological membranes is the central organizing feature of living cells, " explained Moore. "In living cells, if the key i...

Little yellow molecule comes up big

...(free radicals) that otherwise would damage cells' membranes and their DNA beyond repair, the researchers say. ...ys Snyder, who suggests bilirubin may protect cell membranes while glutathione may protect items inside cells. "One oxidant down, ten thousand to go." The fin...

Norwegian study demonstrates targeted coxibs may prevent oral cancer

... in three groups of people 30 with healthy mucous membranes in their mouths, 22 with dysplastic (premalignant) lesions and 29 with oral cancer. The objective was to see whether the levels of COX-2 were linked to aneuploidy (aberrant numbers of chromosomes) in the DNA, indicating a genetic risk marker for canc...

Phase transition in bilayers could affect their performance

...IGN, Ill. -- Phospholipid bilayers that mimic cell membranes in living organisms are of interest as substrates for biosensors and for the controlled release of pharmaceuticals. To better understand how these materials behave with embedded proteins, a necessary first step is to understand how the bilayers resp...

Ion channels allow bacteria to resist stomach acid

...roteins that control the flow of ions through cell membranes -- found in higher organisms. In an article published in the October 17, 2002, issue of the journal Nature , researchers led by Howard Hughes Medical Institute investigator Christopher Miller present evidence that the chloride ion channel is an in...

Purdue creates self-generating nanotubes with 'dial-up' properties

...ectious bacteria by poking holes in their cellular membranes and leaking out their nutrients, just like pricking a hole in a balloon," he said. "Our nanotubes could also act in this manner, but in addition, they have the ability to lure the bacteria with a bait that guides them to the cell membrane where they ...

DNA separation by entropic force offers better resolution

... could be applied by using various types of porous membranes and ceramic filters, as well as nanofabricated sieves. The technique could also be applied to proteins and other polymers, they added. The paper in Analytical Chemistry is titled "Entropic Recoil Separation of Long DNA Molecules." The research was...

Illinois lands research center for advanced water purification

...taminants, such as lead, arsenic and mercury." New membranes developed at the center will have micropores resem...xamine ways to tailor the surface chemistry of the membranes for specific adsorption properties and to enhance the hydrophilic character of the micropores. Scien...

Research reveals a more complete picture of breast tissue

...issue conducts and stores electricity. Living cell membranes carry an electric potential that affect the way a current flows, and different cancer cells have different electrical characteristics. ** MIS: This exam involves the propagation of very low levels (1000 times less than a cell phone) of microwave ene...

UT Southwestern and U.T. Dallas win NIH grant to establish first sickle cell center in Southwest

...search is to understand how altered red blood cell membranes lead to the formation of rigid sickle cells and how best to implement gene therapy that will ultimately cure the disease," Buchanan said. "There have been many advances in treatment during the past two decades that improved the lives of these patient...

Rice, Brookhaven physicists decode initial stage of cell fusion

...lope of molecules around each cell. All biological membranes consist of two layers of lipid molecules, called a...embedded in them. As two-dimensional liquid films, membranes remain one of the least understood components in cells because the most powerful techniques in bioch...

For elephants, its not just their ears and trunk that make them unique on land

...onary response to the vulnerability of the pleural membranes is to replace these with plates of dense connectiv...sm for providing lubricating fluid for the pleural membranes no longer exists, and there is apparently some advantage in allowing the membranes to slide over eac...

Researchers discover how herpes tricks the immune system

...he proteins unite and collect on viruses or on the membranes of virus-infected cells and kill them by punching holes in the membranes. To help prevent the inadvertent and dangerous triggering of this complement reaction, healthy cells produce molecules known as regulators of complement activation (RCA). Virgin...

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