Tag: "experiment" at biology news

Newly created cancer stem cells could aid breast cancer research

...stasize if the mouse lived longer. He repeated the experiment in other mice, reducing the number of cells in the injection to as few as 100 in hopes of slowing tumor growth. The cancer cells continued to seed tumors and those tumors metastasized. In sharp contrast, scientists must inject about 1 million cells t...

ESF EURYI award winner aims to stop cancer cells reading their own DNA

...th antitumor drugs is, as far as I know, the first experiment in which single-molecule experiments have resulted in a prediction for a cellular effect, said Dekker. ...

Testosterone replacement therapy: How safe for aging men?

...age. Blood pressure was measured at the end of the experiment via indwelling arterial catheters inserted into conscious, freely moving rats. Urine was collected for two hours and urinary protein excretion was determined. The researchers found that blood pressure was significantly higher in testosterone-supp...

Experiment suggests limitations to carbon dioxide 'tree banking'

... the decade-long Free Air Carbon Enrichment (FACE) experiment in a Duke University forest suggest that proposals to bank extra CO2 from human activities in such trees may depend on the vagaries of the weather and large scale forest fertilization efforts, said Ram Oren, the FACE project director. "If water ava...

Bacteria may not hasten death

...al flies had the same life span, Tower said. The experiment cannot be replicated in higher organisms, which need bacteria for proper digestion and other functions. But the result in flies still may be relevant to human aging research. In both flies and humans, the number of bacteria living on the organism i...

Human knowledge is based upon directed connectivity between brain areas

... life such as cup, dog or violin. Actually, in the experiment only the factor familiarity was manipulated. Both conditions just differed in the possibility of the subjects to access specific, object-related knowledge in the course of recognition. Based on previous studies the scientists expected to find not onl...

Census of Marine Life historians detail collapse of bluefin tuna population off northern Europe

...n Tuna Breeding Area Yet another modern tagging experiment has yielded important new insights into the vital bluefin breeding area in the Gulf of Mexico and the oceanographic conditions in which the adult tuna court and spawn. The work by U.S. researchers Steven L. H. Teo, Andre M. Boustany and Barbara ...

New grants bolster efforts to generate faster and cheaper tools for DNA sequencing

...hes by hybridization (base-pairing). By doing this experiment many times with many different short, known sequences, the sequence of long DNA strands would be determined. Wlodek Mandecki, Ph.D., University of Medicine and Dentistry of New Jersey, Newark $1,672,000 (3 years) Ribosome-Based Single Molecule Me...

Hepatitis C helicase unwinds DNA in a spring-loaded, 3-step process

...t DNA during infection. The duplex created for the experiment included both single- and double-stranded DNA; fluorescent labels were located in the double-stranded region.) By tracking the gradually increasing distance between the two marked nucleotides as the strands separated in an unwinding event, the rese...

Females more prone to brain damage from alcohol abuse

...e was surprised by the results. "We designed the experiment to be able to identify gene expression differences between lines of mice that are genetically selected for severe alcohol withdrawal compared with mice that are resistant to alcohol withdrawal," Wiren said. "I thought there would be a difference betw...

Changing climate will challenge Northeast agriculture, CU expert warns

...ger a longer growing season and the opportunity to experiment with new crops, "it will also open the door to invasion by new and aggressive crop pests, damaging summer heat stress and serious challenges with water management," said Wolfe. "Adapting to change will add economic stress to family farms already stre...

Homestake strikes gold again

...e proposal investigator, A flag-ship earth science experiment at SUSEL could involve geomicrobiology searches for the limits of, extent of, and details of life in the underground. These investigations would probe fundamental questions at the crossroads of biology and geology, including whether there are new or ...

It don't mean a thing if it ain't got that (modern) swing

...s over. "It's -- boom -- on," she said. Once the experiment was over, the females were returned unharmed to their capture sites. The males had to be assessed in the field to see how vigorously they would approach an apparent interloper on their home territory. Derryberry trudged through knee-deep snow in Ti...

Research ends debate over benefits of butterfly defenses

...ited both species of butterfly the team devised an experiment in an indoor aviary and observed the behaviour of Great-tits as they attacked artificial prey made from almond filled paper parcels. Hannah added: We coated some of the almonds in a non-toxic chemical which gave them a nasty taste, while others w...

Birds take cues from their competitors

...y of Oulu, Finland, stumbled onto the idea for the experiment when looking for some weathered nest boxes in a dimly lit forest one morning. They realized it would be more convenient if the boxes were marked in some conspicuous way, and began to consider what the consequences of such identifying symbols might be...

American Chemical Society's Weekly PressPac -- June 27/July 3, 2007

...n releasing the platinum as an active drug. In one experiment with cultured cells, the SWNTs produced platinum levels inside the cells 6-8 times higher than those for the platinum unit administered in the traditional way. The longboat SWNTs have the potential to carry other passengers to and into the cancer cel...

Autism theory put to the test with new technology

...gy and Medicine, came up with a unique and elegant experiment that uses some cutting-edge technology. In Welshs set-up, two subjects sit across from each other wearing, liquid crystal goggles. They are told to reach for a lighted target in front of them. Welshs previous work has shown that if we see someone...

Scientists discover role of enzyme in DNA repair

...merase. To test this hypothesis, they repeated the experiment in cells that were deficient in a variety of repair proteins. Most deficiencies did not appear to affect the arrest; however, in cells that were missing one of three repair proteins factors ATM, Nbs1 or MDC1 transcription continued even after damag...

World Wildlife Fund warns against iron dumping experiment near the Galapagos Islands

... the open ocean west of the Galapagos Islands. The experiment seeks to induce phytoplankton blooms in the hopes ... World Wildlife Fund. Theres a real risk that this experiment may cause a domino effect through the food chain. Potential negative impacts of the Planktos exper...

University of Arizona launches major scientific research initiative at Biosphere 2

...204,000 cubic meters) under glass. One initial experiment addresses key interactions between plants and wate... compare the gigantic indoor controlled-conditions experiment with the hill slopes outside that are exposed to natural conditions. All of these experiments will b...

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(Date:4/24/2014)... world,s oceans play a crucial role in the ... ecosystems and atmosphere. Now scientists at Scripps Institution ... a leap forward in understanding the microscopic underpinnings ... dioxide to make new cells, a substantial portion ... sea as a buffet of edible molecules collectively ...
(Date:4/24/2014)... EAST LANSING, Mich. --- New research shows that cells ... than scientists originally thought. Even when missing critical components, ... in an alternative way. , In a study published ... of researchers at Michigan State University showed that cells ... duplicate their DNA. , "Our genetic information is stored ...
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Breaking Biology News(10 mins):Microscopic organism plays a big role in ocean carbon cycling, Scripps scientists discover 2Microscopic organism plays a big role in ocean carbon cycling, Scripps scientists discover 3Cell resiliency surprises scientists 2ESA to publish the Journal of Insect Science 2
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