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Tag: "sterile" at biology news

Maggots rid patients of MRSA

...red loss of feeling and reduced blood supply, with sterile free-range larvae of the green bottle fly Lucilia Sericata. They applied the larvae between two and eight times, depending on the size of the ulcer, for four days at a time, with pressure relieving dressings to protect them. No topical antimicrobial ...

Researchers find gene mutation that causes infertility in male mice

... resulting mice. They then analyzed the DNA of the sterile males and identified the allele that caused the infertility. While most studies on the genetics of fertility stem from analyses of mice that have had a custom gene "knockout," this is the first to reveal a dominant mutation that leads specifically to...

Genetic surprise confirms neglected 70-year-old evolutionary hypothesis

...s the flies produced what Masly was looking for--a sterile male. This is when Dobzhansky's 70-year-old hypot...ation that includes no gene at all. These guys are sterile because they completely lack a gene that's necessary for fertility." The gene, called JYAlpha, is o...

Geneticists discover genes that make fruit fly hybrids sterile

...nteresting and beneficial traits, they are usually sterile or unable to survive. For example, a mule, the result of the mating of a horse and a donkey, is sterile. Now, Cornell researchers have made the first identification of a pair of genes in any species that are responsible for problems unique to hybrid...

Looking to a new era in bee research

..., which results in reproductive queens and largely sterile workers. They also address some of the challenges faced by honey bees, including analyses of disease resistant pathways and metabolic adaptations to an all floral diet. Several papers address ways that honey bee studies can provide insights into...

Researchers find that bumblebees' flower choice matters

...Field Station in the Cedarburg Bog is far from the sterile laboratory, and the complexity of their experiments becomes immediately evident: There are more options here than clothes in a teenage girl's closet. Nonetheless, Karron and his research group have developed an unparalleled data set by testing the ...

Scientists discover that ancient genes dictate flowering, fall bud set

...oing research to make genetically engineered trees sterile so that they cannot cross with wild trees -- used consecutive years of poplar clones to study the multi-year delay in flowering. The Science paper reports their discovery that the expression of the FT gene increases with age. "This gradual increase m...

EGF receptor activation prevents microbes from going more than skin deep

... found that AMPs were produced in human skin after sterile wounding of the skin surface, illustrating that exposure to invading microbes is not the sole trigger for the immune response in skin. The authors went on to show that AMP was produced through activation of the epidermal growth factor receptor (EGFR...

New device could cut chemotherapy deaths

...harmacy & Pharmacology to make the fibres more sterile so they cannot be attacked by harmful bacteria. Dr Perera said that other researchers had worked on using tiny beads as a way of delivering drugs locally, but the new system showed greater promise because it could achieve better control when deliver...

Healing honey: The sweet evidence revealed

...now that honey is available in the form of various sterile products licensed for use in wound care. Clinicians should check the evidence that exists to support the use of honey." ...

Sociality of sweat bees evolved simultaneously during climate change

...ial behavior in which the animals have permanently sterile worker castes (among other traits). Eusocial animals include honey, bumble, carpenter and sweat (halictid) bees, ants, termites, many wasps as well as certain kinds of shrimp and the naked mole rat. Danforth's study, to be published in a forthcomin...

HIV/AIDS rates in Tijuana, Mexico increasing at alarming rate

... use of condoms and increasing the availability of sterile syringes, can make a major difference in fighting this epidemic," said Steffanie Strathdee, Ph.D., Chief of the Division of International Health and Cross-Cultural Medicine at UCSD, where the study was conducted. Other co-authors include Robert S. ...

New GM mosquito sexing technique is step towards malaria control, report scientists

...advance paves the way for pooling large numbers of sterile males which could be used to control the mosquito ... at an early stage, it will be possible to release sterile males into the population without the risk of releasing additional females. The release of sterile m...

Hybrid grass may prove to be valuable fuel source

...ource because of its high yields and because it is sterile and cannot become a weed, Heaton said. "Miscanthus sacchariflorus and some of the other fertile Miscanthus species can be quite invasive," she said. At a research station near Hornum, Denmark, giant Miscanthus has been grown for 22 years in Europe's...

Gifts from the sea

...velopment of tools used to test humans, drugs, and sterile environments for toxins. Skate (Raja erinacea): Human retinas have two kinds of light-sensing cells: rods and cones. Skate retinas have only rods--yet they can still sense light. MBL scientists have studied skate retinas to learn how eyes adapt to l...

First production of human monoclonal antibodies in chicken eggs published in Nature Biotechnology

... months to 3 years for goats or cattle. The egg is sterile and stable, providing a good starting material for isolation and purification of the protein of interest. Moreover, conditions for good manufacturing practices have been long-established for vaccine production in chicken eggs." "This work really exe...

Master gene controls healing of skin in fruit flies and mammals

... flies in cells surrounding a wound created with a sterile needle. The researchers then worked backward, using bioinformatics--computational analysis of DNA sequences--to identify grainyhead as the master gene that initiates the genetic chain reaction that results in cuticle repair. Wounds in mutant flies th...

Sexual cooperation: Mating increases longevity in ant queens

...l months or years of colony growth, during which a sterile worker force is built up in the population. The fact that mates bond so early reduces the conflict between mating partners because both sexes benefit from the queen experiencing a long reproductive phase after the colony reaches sexual maturity. ...

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