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Tag: "carry" at biology news

Iowa State scientists demonstrate first use of nanotechnology to enter plant cells

...ce area of a football field, making it possible to carry a large payload," Trewyn said. Lin’s nanoparticle has a unique "capping" strategy that seals the chemical goods inside. In previous studies, his group successfully demonstrated that the caps can be chemically activated to pop open and release the ...

Genome of yellow fever/dengue fever mosquito sequenced

...he form of a genetic control, such as using TEs to carry a gene into the genome that would make the mosquito resistant to the virus and stop its role as a vector for disease. Although that scenario is challenging, the payoff is potentially great, Tu said. "By introducing TEs in a more or less random wa...

Latent memory of cells comes to life

...s called nucleosomes. Importantly, nucleosomes can carry various chemical modifications that either allow, or prevent, the expression of the DNA wrapped around them. Every time a cell divides into new cells, its double-stranded DNA splits into two single strands, which then each produce a new double-strand...

A new portable biosensor detects traces of contaminants in food more quickly and cheaply

...to their characteristics, such as their ability to carry out measurements in the field, the biosensors are analytical tools which have numerous applications in the agro food industry, and can be used as an alarm for the rapid detection of 'risk' of contamination in practices based on Risk and Critical Cont...

NIAID expands capability for influenza research and surveillance

...ht paths of migratory birds. This center also will carry out a human influenza surveillance study in Thailand and will monitor U.S. agricultural workers who work with swine. Emory University, Atlanta (principal investigator—Dr. Richard Compans) This center will conduct studies to determine how influen...

Researchers wake up viruses inside tumors to image and then destroy cancers

... them, Pomper says. For imaging purposes, FIAU can carry a radionuclide that emits a low energy gamma photon, but it can also be engineered to carry therapeutic radionuclides, which are lethal to cells in which TK is activated. Results of this st...

Fish extinctions alter critical nutrients in water, study shows

...arge, highly mobile fish, are almost impossible to carry out in the wild, but new methods are helping researchers better understand these systems. "Computer simulations provide a means to assess patterns of species loss in a system in which we just cannot do complex experiments," said co-author Alex Flec...

Researchers develop marker that identifies energy-producing centers in nerve cells

... electro-chemical impulses or nerve signals, which carry information from one part of the brain to another. Mitochondria in the neurons function like cellular powerhouses to produce those impulses through a metabolic process that combines oxygen with food calories. It is these nerve signals that cause musc...

Investigating the measles virus as a tool to kill multiple myeloma

... a strain of measles virus which was engineered to carry an additional gene that codes for the sodium iodide symporter (NIS) protein. NIS is produced by the thyroid where it attracts and concentrates iodine. This characteristic of the NIS protein can be exploited as a target in cancer therapy because it...

Genetic fingerprints identify brain tumors' origins

... emerge." Cells in different parts of the brain carry the same genes, but they also contain factors that modify the use of those genes, suppressing some genes and activating others to allow the cells to take on specialized characteristics as the brain matures. These changes in gene activity levels are c...

A 'traffic light' for neurons means 'go' for improving brain research

...rent types of cells communicate with each other to carry out very complex things like emotion or how people make decisions?" Funding for the paper's authors comes from NIH, the California Institute of Regenerative Medicine, the Max Planck Society, the Deutsche Forschungsgemeinschaft (German Research Fou...

Mutation improves memory, may lead to memory-enhancing pill

...of a natural memory-blocking protein. Animals that carry a defective version of this gene showed improved performance in classical behavioral memory tests, they show. Moreover, animals treated with a small molecule that had the opposite effect—leading ultimately to an increase in the memory-blocker's conce...

Tracking sperm whales and jumbo squid

...ith other pelagic species that are large enough to carry electronic tags." Added Gilly: "Although human observers at the surface of the sea must still infer what the mysterious squid and the leviathan are doing at great depths, the use of modern electronic tagging methods will surely guide those inferen...

Discovery could lead to better control of hemorrhagic fever viruses

... severe infection when exposed to the rodents that carry the viruses. Choe's lab is now trying to find the cellular receptor for other viruses that cause hemorrhagic fever in humans. In 2003, Choe's lab collaborated with Farzan's lab to identify angiotensin converting enzyme2 (ACE2) as the receptor for ...

Scientists learn the origin of rogue B cells

... answer. "This is only one step," he says. "We all carry these cells around, but not all of us develop autoimmunity. Our work provides one explanation for the origin of these self-reactive B cells." "If you understood the system extremely well and were able to delete the editing cells during development...

Female Antarctic seals give cold shoulder to local males

... individuals tend to be more resistant to disease, carry fewer parasites, and in the case of males, are more aggressive and father more offspring. It had long been assumed that the females were passive, simply mating with their nearest male. However, using paternity tests, the scientists demonstrated th...

Hybrid molecule causes cancer cells to self-destruct

... used innocuous sugar molecules such as glucose to carry butyrate into the cells. The Johns Hopkins team tried a different tack. "We didn't think they chose the right partner molecule," said Kevin J. Yarema, an assistant professor of biomedical engineering who supervised the project. "Our insight was to se...

3 proteins may play important role in nerve-cell repair

...ration of long parts of the cell called axons that carry the nerve impulses. Levels of cAMP drop in mammalian nerve cells as they mature, and this is thought to explain, in part, why mature nerve cells cannot regenerate damaged axons. "Our findings provide additional evidence that cAMP plays an imp...

Researchers find gene mutation that causes infertility in male mice

...inherit from each parent) is dominant; females who carry it remain fertile but carry the defect and pass the mutation on to future generations. However, female carriers show higher ra...

Fitness has fallen since the days of Ancient Greece

...tiline's men to death, and despatched a trireme to carry out this command. The next day, the assembly relen..., Olympias, was built in the 1980s and was used to carry the Olympic flame to Piraeus, the port near Athens, at the start of the last Olympic Games. It is no...

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