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Tag: "charged" at biology news

UAB scientists discover the origin of a mysterious physical force

...orce occurring between different electrostatically charged molecules, such as DNA and other biomolecules, whe...s surrounded by certain types of electrostatically charged molecules, such as DNA and some biological compounds, and when thin films form in detergents. The di...

An HIV Protein Plays a Surprising Role in Gene Activation

...karyotes have three types of RNA polymerases, each charged with transcribing different types of genetic elements. RNA polymerase II transcribes protein-coding genes. RNA polymerases join with so-called general transcription factors to form a pre-initiation complex (PIC) on the gene's promoter, where it binds...

Spider Venom Could Yield Eco-Friendly Insecticides

... (Ion channels allow the movement of ions -- small charged molecules -- across cell membranes.) His next challenge is to use this information to design insecticides that specifically target insect pests without affecting vertebrates. One approach is to create chemical insecticides that mimic the action of s...

Probing The Promise And Perils Of Nanoparticles

...." More recently, Leroueil studied other types of charged nanoparticles called polycationic polymers—already being used to deliver drugs and genes—to see if they behaved like dendrimers. "It turns out that they cause the same permeability and, in general, they cause membrane destruction as well," said Banas...

Probing the promise and perils of nanoparticles

...." More recently, Leroueil studied other types of charged nanoparticles called polycationic polymers---already being used to deliver drugs and genes---to see if they behaved like dendrimers. "It turns out that they cause the same permeability and, in general, they cause membrane destruction as well," said B...

Discovery may lead to better Candidiasis drug

...rom regulating its ions, the positive and negative charged molecules that move into, and out of, cells. Ions regulate electrostatic pressure between the cells' internal and external environments, which, in turn, regulates their volume and water content. Cells that lose their water content without being able ...

Some Brain Cells 'Change Channels' To Fine-tune The Message

...NSF for short, that help replace channels that let charged calcium ions in with another kind of channel that ...l, in will flow sodium, calcium, chloride or other charged atoms that then keep the communication process going. In the cells in the cerebellum, a channel mad...

South African Tribunal Asks For Damages Estimates in GSK AIDS Drug Case

... the complaint, AHF and others allege that GSK has charged excessive prices for AIDS drugs to the detriment of South Africans with HIV/AIDS and in violation of the Competition Act. “South Africans know that AIDS drugs are sadly out of reach for most of them because of pricing actions like GSK’s,?said Swazi ...

Scripps scientists find potential for catastrophic shifts in Pacific ecosystems

...s such as El Niño events to environmental managers charged with overseeing and sustaining ecosystem resources such as fisheries. Surprisingly, it relates to many disciplines involving complex webs of mutually interacting parts, such as ecosystems and world financial markets, which have the potential for unex...

Molecular thermometers on skin cells detect heat and camphor

...nd this causes them to open and allow electrically charged ions to pass through and cause an electrical potential that signals the brain. Patapoutian and his colleagues discovered TRPV3 a few years ago by conducting a computer search through an early-assembled draft of the human genome. Its sequence similar...

Remote control flies? Fly behavior controlled by laser light

...ion channel, or a pore-forming protein that allows charged particles to pass through a cell membrane. The small molecule ATP activates the ion channel chosen by the researchers, so ATP became the key. To keep the ATP from binding to the ion channel and jump-starting the nerve cell's activity before the prope...

Engineers improve plastic's potential for use in implants by linking it to biological material

...hich in T59 appeared to be drawn to the positively charged surface of the polypyrrole the way magnets of opposite charges cling together. Yet other peptides containing aspartic acid didn't attach to polypyrrole, leading the researchers to speculate that something contributed by the other amino acids in T59 i...

Some Brain Cells Change Channels

...NSF for short, that help replace channels that let charged calcium ions in with another kind of channel that ...l, in will flow sodium, calcium, chloride or other charged atoms that then keep the communication process going. In the cells in the cerebellum, a channel mad...

Scripps research scientists identify infertility molecule

...spholipid. Phospholipids, molecules of fat with a charged head on one end, are commonly found in biological organisms and are generally regarded as essential structural components of cells. For instance, bilayers of phospholipids are the primary component of cellular membranes, those essential barriers that...

Anthrax test, developed by army and CDC, receives FDA approval

...rk (LRN). This network, established by the CDC, is charged with maintaining an integrated system of state and local public health, federal, military, and international laboratories that can respond to bioterrorism, chemical terrorism and other public health emergencies. According to USAMRIID senior scientis...

'Mad cow' proteins successfully detected in blood

...rk (LRN). This network, established by the CDC, is charged with maintaining an integrated system of state and local public health, federal, military, and international laboratories that can respond to bioterrorism, chemical terrorism and other public health emergencies. According to USAMRIID senior scientis...

FSU scientist warns North Atlantic right whale facing extinction

... (NOAA) National Marine Fisheries Service has been charged with reducing the number of North Atlantic right whales killed by human activity, the government simply isn't doing enough to protect the North Atlantic right whale and its habitats. At least 50 percent of all recorded deaths are due to collisions wi...

Scientists to mimic nature for newest cancer drugs

... (NOAA) National Marine Fisheries Service has been charged with reducing the number of North Atlantic right whales killed by human activity, the government simply isn't doing enough to protect the North Atlantic right whale and its habitats. At least 50 percent of all recorded deaths are due to collisions wi...

A molecule impedes the destruction of the 'Brucella' bacteria

...cella abortus, escape destruction within the cells charged with eliminating infectious agents (macrophages). This research has been published in Nature Immunology scientific magazine. Brucella is a model of an intracellular parasite, a category that includes other important bacteria, such as those of tuberc...

Beetle-inspired switch uses water for bonding

... from electrodes. The electricity moves positively charged atoms, called ions, in the water through the minute capillaries of a thin disk of porous glass embedded in the plate. The water moves and wells up into a micrometer-sized droplet on the plate surface. The exposed droplet can then stick to another sur...

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