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Tag: "active" at biology news

Scientists find a maturity gene in fly

...s ?maturation from an immature larva to a sexually active adult. It is the first genetic mutation found to cause early maturation in fruit flies, according to a new study in the Friday June 3 issue of the journal Cell. The flies are abnormally small and die as they enter adulthood, sometimes when their head...

MWG Biotech expands siMAX?siRNA portfolio with new scales, lengths and design tools

...s ?maturation from an immature larva to a sexually active adult. It is the first genetic mutation found to cause early maturation in fruit flies, according to a new study in the Friday June 3 issue of the journal Cell. The flies are abnormally small and die as they enter adulthood, sometimes when their head...

Freeze-dried mats of microbes awaken in Antarctic streambed

...hen the team used sandbags to divert water from an active streambed in the McMurdo Dry Valleys into the dry streambed, she said. A time series of aerial photographs, coupled with carbon isotope analyses of the cyanobacteria that measured variation in atmospheric carbon over decades, indicated the streambed ...

Drugs from the deep blue

...try department, including research on biologically active molecules and high-throughput screening techniques. Most of Molinski's samples come from sponges and tunicates, marine creatures that can neither swim away from a diver nor bite. Recently, the researchers have also begun to collect samples from cyan...

Brain networks change according to cognitive task

... data, which can only show which brain regions are active in a given task, showed two brain regions that were specifically active for each of the studied tasks: the lateral temporal cortex (LTC) for the rhyming task and the intrap...

Neurotransmitters signal aggressive cancer, offer potential for early diagnosis

...of gene sequences, to obtain information about how active each gene in tumors is. They combined the mouse data with parallel data from 182 human tumors. Then, the gene-activity data was fed into sophisticated software that supplied the researchers with a prediction about which metabolic reactions were revv...

Researchers develop new testing methods for potential monkeypox or smallpox outbreak

...ect a smallpox outbreak," said Slifka. "This is an active area of further investigation." The test even works in cases where infection may not be obvious. For instance, three of eight subjects who had previous smallpox vaccinations failed to show any outward signs of viral infection and had no noticeable d...

Techniques available to detect soil that inhibits destructive soybean pest

... richness, moisture and temperature can affect how active and numerous soybean cyst nematodes are in particular fields. "A key find was that a small amount of suppressive soil or a cyst from a suppressive soil can lower nematode numbers," Westphal said. "We promote conditions in soil to suppress the nemato...

Asian immigrants in NYC not receiving HIV education at religious institutions

...they feared they would contract HIV if they became active in HIV prevention and education. In fact, some said they believe that HIV can be contracted by sharing soap or a drinking glass with an HIV-positive person or through casual contact. Other leaders feared they would be shunned in their communities if...

Bronx Zoo bears are new Samsonite gorillas

...ters and other sources of food become a third less active and weigh up to 30 percent more than bears living under wild conditions. ...

Study hints at role of stem cell genes in testicular, breast cancers

...eir surprise, that the expression of the genes was active there, too. "We thought this was going to be a phenomenon unique to germ cell tumors," says the senior author of the study, Amander Clark, PhD, assistant research geneticist in the laboratory of co-author Renee Reijo Pera, PhD, associate professor o...

MicroRNAs have shaped the evolution of the majority of mammalian genes

...onarily conserved microRNA targets are known to be active in the processes of cell proliferation, development, and cancer," says Farh. "Our genomes have good reason to maintain the microRNA targeting sites necessary for turning down these genes at the appropriate place and time." An emerging idea is that ...

Customized gene chip provides rapid detection of genetic changes in children's cancer

...elphia. "As future research identifies other genes active in neuroblastoma, we can modify the microarray to include such regions," he added. "We have customized this tool for neuroblastoma, but the approach might also be adapted to other types of cancer in which DNA changes are important," said co-author P...

PLoS Medicine publishes first trial of effect of male circumcision on HIV infection

...ractice. The researchers offered young sexually active uncircumcised heterosexual men the chance to be circumcised and then monitored for HIV infection. The participants (3,274 men) were randomly allocated to two different groups--one group was immediately circumcised and the other group was to remain un...

HIV inserts into human genome using a DNA-associated protein

...III for hemophilia patients. HIV integrates into active transcription units on chromosomes within the nucleus of human cells. These units are sites that lead to efficient expression of the viral genome. Most HIV-infected cells in a patient will have a very short life span, a day or less. "We surmise that ...

Plant wounds trigger bacteria

... to a related protein, VirG, converting it into an active form. The new study shows that the activated form of VirG causes the tumor-inducing plasmid to replicate up to five times faster than normal by increasing the expression of a protein called RepC, which is required for replication of the plasmid. Th...

Zebrafish may hold key to improved cancer research

...ost of the carcinogens that affect humans are also active in zebrafish and can lead to the same types of can...wood stoves. University researchers have also been active in studies on dioxin and PCBs, both concerns in the process of carcinogenesis. "With zebrafish as a...

Regenerating worms help elucidate stem cell biology

... one of these genes, called smedwi-2, that was active in dividing neoblasts. Smedwi-2 belongs to the Argonaute/PIWI protein family and is most similar to PIWI proteins found in fruit flies. According to Sánchez Alvarado, PIWI proteins have been shown to play a role in regulating stem cells in plan...

Wolves' top-down effect

.... "We also found that as elk populations climbed, active beaver lodges declined, probably because beavers could no longer find sufficient trees with which to build their dams," says Hebblewhite. In addition, songbirds, such as the American Redstart, which is strongly dependent on willow, also vanished fro...

Researchers discover why melanoma is so malignant

...ts mutated form can cause in fruit flies). Slug is active in the neural crest, an early embryonic cluster of cells that eventually gives rise to a variety of cell types in the adult, including dermal melanocytes. In this early embryonic stage, Slug enables the neural crest cells to travel, and then settle, ...

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