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Tag: "plastic" at biology news

Wisconsin scientists find a way to make human collagen in the lab

...d by burns and wounds. Commonly, it is employed in plastic surgery to augment the lips and cheeks of starlets and others seeking perpetual youth. Catgut, the biodegradable sutures made from cow or horse intestines and used in surgery to minimize scarring, is also a form of collagen. But for such a commonpla...

Losing sleep undoes the rejuvenating effects new learning has on the brain

...d rats on one of two tasks using a water maze -- a plastic pool about six feet in circumference and two feet deep. Rats were placed in the water and had to swim to the exit platform. One group could not see the platform, which was placed underwater, and had to form a "mental map" of the maze -- a spatial me...

African amphibians make extreme parental sacrifice: The skin off their backs

... with their broods and put the animals into small, plastic boxes filled with soil to simulate natural nesting conditions. Then they observed and videotaped interactions between young and their mothers. "We observed eight episodes of skin feeding by different young from five different broods," Nussbaum said...

Uncovering sex-change secrets of black sea bass

...istant professor of zoology, peers into a big blue plastic tub. Inside, black sea bass circle slowly in the dim light. The converted barn is now an aquaculture research facility for the College of Life Sciences and Agriculture, and home to Berlinsky's latest research. Black sea bass feature prominently on m...

UCR researchers design chip that can improve citrus varieties

...ce computer chips. The glass wafer is encased in a plastic container somewhat smaller than the size of a credit card. To use the chip, researchers purify total RNA (which reflects the genes expressed in the tissue) from plant tissue, make a copy of these molecules with a chemical tag added, and then "wash...

Plastic surgeons countdown first full facial transplantation

...ation performed in France spread around the world, plastic surgeons have continued to research how to make th...r-reviewed, scientific studies of their kind, U.S. plastic surgeons demonstrated how to successfully complete a full facial tissue transplantation from one hum...

Malignant melanoma cells secrete protein required for embryo formation

... The Hendrix lab has long hypothesized that the plastic nature of malignant melanoma cells serves as an advantage by enhancing the cells' ability to migrate, invade and metastasize virtually undetected by the immune system. In this study, the researchers showed that aggressive tumor cells, particularly ...

Ultrasound may help regrow teeth

...ed on an orthodontic or "braces" bracket or even a plastic removable crown. The team also designed an energy sensor that will ensure the LIPUS power is reaching the target area of the teeth roots within the bone. TEC Edmonton, the U of A's exclusive tech transfer service provider, filed the first patent rece...

Tropical forest CO2 emissions tied to nutrient increases

...aid Cleveland. Soil respiration was measured using plastic tubes in the ground running into vented, closed chambers. According to the National Academy of Sciences, temperatures on Earth have risen by more than 1 degree F in the past century due to build-up of greenhouse gases in the atmosphere, primarily CO...

Surprise finding for stretched DNA

...s as a free swivel. Immediately below this nick, a plastic bead is attached to the DNA to serve as a "rotor" that will spin in response to torque. Magnets are used to manipulate the magnetized bead, providing a measured and highly controlled amount of tension to stretch the DNA molecule. With the use of a f...

Plants tell caterpillars when it's safe to forage

...ers" fashioned out of filter paper attached to the plastic cups they were kept in. When larvae were fed an artificial diet, however, different light conditions produced no changes in their hiding behavior. But introducing plants changed larvae behavior under both day and night conditions. Six pots of three...

Microbes transform 'safest' PBDEs into more harmful compounds

...ion, upholstery and many other products containing plastic and foam. If these products overheat, PBDEs release atoms called bromines that sap oxygen from the air, preventing a fire. Over time, PBDE’s can leach into the air, soil and sediment, and move up through the food chain. These compounds have been dete...

Nanotubes used for first time to send signals to nerve cells

...films of carbon nanotubes deposited on transparent plastic can also serve as a surface on which cells can grow. And as researchers at the University of Texas Medical Branch at Galveston (UTMB) and Rice University suggest in a paper published in the May issue of the Journal of Nanoscience and Nanotechnology, ...

The appearance of your hands can reveal your age, study finds

...g only their hands. "A primary motivation to have plastic surgery is to look and feel better, often by seeking a younger looking appearance. However, looking younger after your facelift or eyelid surgery can conflict with aged hands that simply do not match the face," said Roxanne Guy, MD, ASPS president-e...

Iowa State researchers improving plastics made from corn and soy proteins

David Grewell picked up the little plastic model of a molecule he keeps in his office. He scr...ed to be separated and mixed evenly throughout the plastic to be much good as a reinforcing agent. The researchers are turning to high-powered ultrasonics ?...

Fat stem cells being studied as option for breast reconstruction

...ed by J. Peter Rubin, M.D., assistant professor of plastic and reconstructive surgery at the University of Pittsburgh School of Medicine, recently received a three-year grant from the National Cancer Institute to further explore this unique approach. "The surgical options for breast reconstruction involve...

Ground spider diversity studied in research project

...County. Henderson set out pitfall traps ?made of plastic cups, funnels and animal-safe antifreeze ?to collect the spiders. A variety of sites ?including upland woods, post oak woodlands and an area disturbed by a high level of human activity ?were chosen. The collected samples are being identified and pl...

Artificial cornea offers better results for infants, some blind patients

...r team this summer. The latest study involved a plastic device known as the Boston Keratoprosthesis, an ar...s up with every subsequent operation. But with the plastic implant, these kids are looking great. "The timing is crucial, because if a child hasn't seen out...

Archerfish tune their shots to universal properties of prey adhesion

...ect of the archerfish's hunting strategy is not as plastic in response to learning as might have been thought. Instead, the strategy may reflect the evolution of archerfish behavior in accordance with a recently discovered scaling law: Among animals such as flies and lizards, an animal's adhesive force--its ...

MIT device draws cells close -- but not too close -- together

...and time problem involved another children's game: plastic puzzles with squares that slide around on a grid. They wondered if they could put different cells on each square and then move them around. This idea quickly evolved into an elegant tool designed expressly for biologists. The device involves ...

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