Who do mosquitoes love? Free Technical Library News

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Who do mosquitoes love

02.10.2000

Researchers from the University of Durham in England and the Medical Research Council in The Gambia concluded that mosquitoes bite pregnant women twice as often as other people. In the same proportion, their risk of contracting malaria also increases.

Scientists believe that mosquitoes are attracted to chemicals released by the body of a pregnant woman along with the exhaled air. These substances help malarial mosquitoes to find their breadwinners. In addition, pregnant women have higher body temperature and sweating.

As a result, ideal conditions are created for the reproduction of bacteria on the skin, which also secrete compounds that attract mosquitoes. However, not only the physical condition, but also the behavior of pregnant women makes them more vulnerable.

Research from the Gambia shows that pregnant women are twice as likely to throw back their mosquito nets at night, and are therefore twice as likely to be bitten by mosquitoes.

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The entire cycle of DNA work is tracked 30.08.2012

Researchers at the University of Texas have developed technology to track the entire cycle of DNA.

Scientists have used fluorescent molecules to label DNA and control a process called DNA cycling. This natural biological process "rearranges" the genetic material in certain cell types. The new method not only sheds light on how DNA works, but could also help develop drugs to effectively fight certain DNA-manipulating viruses, such as HIV. Until now, scientists have mostly been able to take "snapshots" of the initial and final stages of DNA cycle formation. About what happens in the middle of the cycle, it was possible to learn only fragmentarily.

Scientists have known for more than 30 years that the DNA cycle is an important part of molecular biology and gene regulation, but only now is it possible to study the details of this process.

The DNA cycle is a mechanism widely used in many cases of spontaneous splicing (cutting and joining certain nucleotide sequences from RNA molecules). Proteins in cells or proteins in viruses dock at certain points in the DNA molecule. These points together form a closed loop, and then the genetic material between the points is cut off. This process is especially important for viruses and bacteria, it is likely that similar processes occur in human cells.

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American bioengineers have isolated DNA segments that contain docking points for Cre. Molecules fluorescing at certain wavelengths of light were inserted into these points. By tracking changes in fluorescence, the researchers could observe the stages of the DNA cycle.

The new technology is useful not only for fundamental biology and genetics, but also for creating more effective methods for finding new drugs to fight HIV and other dangerous viruses and bacteria.

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