Science & Technology Current Affairs - 2019
Science & Technology Current Affairs 2019-2020 category comprises current affairs with all important national / international updates in science and tech and events for the year 2019-2020 for UPSC, States, Civil services, SSC and other competitive examinations of India and States.
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Scientists have developed a new ultra-sensitive sensor test which is also 10 times cheaper to detect the early stages of several cancers and viruses, including HIV, with the naked eye.
What is the technique?
The new visual sensor technology detects biomarkers which are produced in the body when it is infected with certain disease. The sensor works by analyzing serum, derived from blood, in a disposable container. The color of the liquid changes to give either a positive or negative result. This change in color can be easily seen with naked eyes.
How it can help?
The test is 10 times cheaper that existing gold standard tests. It can detect onset of diseases like certain cancers and HIV in early stages.
Researchers have discovered two new chemical compounds that can speedily kill the Plasmodium parasites that cause malaria.
Around 3 million deaths are caused by Malaria every year, and it is dominant in tropical regions of Africa, Asia, and Latin America.
How this finding can help?
- Although anti-malarial drugs are already available but there is need to develop more efficient drug to counter increasing resistance of Plasmodium parasite.
- The newly identified treatment has been found so effective that it can kill 90% of the parasites in just 3 hours and all those tested in laboratory samples of infected human blood cells, within 12 hours.
How does it work?
- These molecules interfere with an important stage of the parasite’s growth cycle and use this effect to kill them. They affect Plasmodium falciparum’s ability to carry out transcription (the biological process whereby the DNA sequence in a gene is copied into RNA).
- These compounds kill the parasite during the long period of its complex life cycle while it resides in the blood-stream. This is an advancement over the majority of anti-malarial drugs, whose action is limited to shorter stages of Plasmodium’s life cycle.