Tag: "membranes" at biology news
Research to estimate pesticides' effects on children
...o-body-weight ratio. "In a growing body, cellular membranes
are expanding. As a result, toxic chemicals readily pass through those membranes," Leckie observed. "Also, biochemical pathways in children are not complete yet and can be easily damaged. This damage is often manifested in slow learning and slow deve...
Drug wrecks the power plants of cancer cells
...ic core that attracts it to the negatively charged membranes
of mitochondria of cancer cells and allows the molecule to traverse them. The higher negative charge is a property that seems to be characteristic of mitochondria in many cancer cells. "Because these mitochondria have a higher negative transmembrane ...
New method for 'visualizing' proteins
...isms of chemical and biological materials, such as membranes
and proteins. Basically, the technique elucidates how molecules move, react and interact with one another. The protein studied for the JACS report, T4 Lysozyme, is one of the proteins of a bacteriophage, or virus, that is parasitic within a bacter...
Membrane filters offer options for cleaner water
... "Once we understand the complexities of how these membranes
interact with contaminants, we can determine the p...roup is studying various types of novel filtration membranes
that might be used to remove the smallest of contaminants dissolved in water. "The discoloration of ...
New device removes drinking water contaminants
...hat lives as a biofilm on the outer surface of the membranes
in the system. The microorganisms, found naturally...s for the transfer. A bundle of 7,000 hollow-fiber membranes
are in one of the pilot-study biofilm reactors, a column approximately 5 feet tall and 18 inches in ...
Promising new therapies for deadly form of leukemia
...a receptor tyrosine kinase that is embedded in the membranes
of developing blood cells. FLT3 normally switches on at specific times during the maturation of blood cells. In AML, however, the gene for FLT3 is mutated, so that it produces a receptor that is constantly or constitutively active. This activity di...
Harden McConnell named winner of 2002 Welch Award in Chemistry
...about the fundamental molecular properties of cell membranes
that provide new insights into how the body regula...asure the movement of molecules through and within membranes
in thelaboratory -- a technique that was later shown by many researchers to apply to living cell mem...
Welch Award honors McConnell for insights into physical chemistry, cell membranes
...asure the movement of molecules through and within membranes
in the laboratory; this was later shown by many researchers to apply to living cell membranes. His research also showed how a protein present in the body combines with that of a foreign peptide on the cell membrane to enable the body to recognize a p...
Hot polymer catches carbon dioxide better
...s as high as 370 degrees Celsius. To date, polymer membranes
commercially available for gas separation are limi...the practicality and economic feasibility of using membranes
in industrial settings." According to Young, developing an efficient and economically feasible membr...
Cancer-suppressing protein is part of amoeba's compass
...nces in concentration of the chemical, alter their membranes
and move forward?" asks Peter Devreotes, Ph.D., professor and director of cell biology in the school's Institute for Basic Biomedical Sciences. "It's a very complex puzzle, and we've found another piece." Postdoctoral fellow Miho Iijima, Ph.D., and D...
New program helps protect Asian elephants through crop-raiding prevention
..., but short term, irritation in the eyes and nasal membranes
which is unpleasant and temporarily incapacitating, although it causes no permanent harm," said Martin Tyson, co-manager WCS Sumatran Elephant Project. "Areas doused with capsaicin and ropes coated in chilli-laden grease will be too 'hot' for them t...
Freezing cancer cells makes them prime targets for anti-cancer drug, new study finds
...e researchers said the freezing process makes cell membranes
more permeable, allowing bleomycin to kick in. Ble...e deep freeze and would therefore have intact cell membranes
that would protect them from the bleomycin. In practice, surgeons treating prostate cancer avoid le...
New technique to make gene therapy more efficient
...lobules called liposomes that can pass through the membranes
round cells. But simply getting a gene into a cell isn't enough-for the desired protein to be produced, you need to get the gene into the cell's nucleus. At around 100 nanometres in size, most liposomes are too large to pass through the tiny pores in...
Researchers identify cell, genetic environment behind nerve-tissue tumors that lead to cancer
...nial nerve related to hearing and balance, and the membranes
around the brain and spinal cord. NF-2 is present in about 1 in 40,000 people worldwide. The benign tumors, called neurofibromas, develop into malignant tumors, called neurofibrosarcomas, in 10 percent to 15 percent of NF-1 patients. The malignant tu...
DEET brain effects in animals warrant caution
...ive oxygen species), which can damage DNA and cell membranes
in the brain and the nervous system. The most severe brain cell changes and sensorimotor deficits were seen among rats exposed to combinations of DEET, permethrin and the anti-nerve gas agent pyridostigmine bromide, which reduces the body's normal a...
Making meningiomas: Scientists pioneer animal model of human meningioma
...ningiomas are tumors of the meninges, the delicate membranes
that cover the surface of the brain and spinal cord (most commonly known as the site of inflammation during meningitis). Although the majority of meningiomas are benign, a portion are malignant and associated with significant morbidity. Meningiomas ...
Ultrasound cleans ceramic filters: Could aid water treatment
...lows through the channels, the membranes
act as sieves to catch contam...s. The problem: over time, the membranes
become clogged with contaminants, and must be cleaned. Weav...
The next generation of scientists recognized at Johns Hopkins
... has changed thinking about the proteins that make membranes
of a tiny compartment within cells. The Daniel Nathans Research Award went to Mark Levis, M.D., Ph.D., whose studies have led to clinical trials of a new treatment for acute myelogenous leukemia, the disease that claimed the life of the award's names...
Small research big on Illinois campus
... For example, by creating architectures involving membranes
and DNA molecules, Lu and Wong are attempting to exploit the biological self-assembly process as a kind of template to organize magnetic nanoparticles for use in sensors and other devices. UI researchers Steve Sligar in biochemistry and Chang Liu in ...
Los Angeles chemist wins national award for thin-film discoveries
...ter understand how molecules interact to form cell membranes
in the body, for example, or can spread as a thin film on the surface of lungs to help with respiration. You can put molecules on a solid surface the same way, he noted. Weve had collaborations with this kind of approach being used to replace silicon...
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