Science & Tech Current Affairs

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.

UV Blaster: Disinfection Tower developed by DRDO

The Defence Research and Development Organization has developed Ultra Violet Disinfection Tower for chemical free and rapid disinfection. The tower is to be highly helpful in high infection prone areas.


The equipment named UV Blaster is a UV based sanitizer that was designed and developed by DRDO. It is highly helpful for disinfecting high tech surfaces such as computers, electronic equipment and other gadgets. UV Blaster is helpful in offices where chemical methods may not be suitable.

The product is also very much suitable in areas where chemical methods cannot be implemented.


The UV Disinfection tower can be operated through mobile phone or laptop remotely. There are six lamps each of 43 watts. The lamps emit Ultra Violet light of wavelength 254 nm in 360 degrees of illumination. The tower will switch off during human intervention or accidental opening of the room. The device also provides arm operation.


The DRDO has been developing several new technologies and products to help in disinfection, sample collection, cost effective personal protective equipment. Several of these technologies were transferred to private sector companies. Recently DRDO developed ATULYA, a microwave sterilizer to help disinfecting COVID-19. DRDO had also developed a kiosk for COVID-19 sample collection.

What is COVID Toe?

The British Journal of Dermatology Researchers have so far observed 5 clinical patterns of the COVID-19 cases. One such is COVID Toe. COVID Toe is a kind of rash that is being developed in COVID-19 patients.


According to the study, COVID Toe was observed in 19% of patients infected with COVID-19. The dermatologists call the red rashes as Pseudo-Chilblain lesions. They are small red and itchy patches that occur on the fingers and toes when exposed to cold.


Chilblains occur due to inflammation of blood vessels and response to repeated exposure of cold air. It usually goes away in one or three weeks. However, this was not the case with Chilblains like patches due to COVID-19.

Five Clinical Patterns Observed

According to the study, five clinical patterns were observed in patients with COVID-19 infection. They are as follows

  • Small blisters on the limbs and trunks were found on 9% of COVID-19 patients. It was more among middle aged patients
  • White of pink skin that looked like nettle rashes were observed in 19% of patients
  • Maculopapules were found in more than 47% of patients. Maculopapules are small, raised and flat red bumps that were common in patients with severe infections.
  • Livedo occurred in 6% of patients. Livedo is condition where the skin looked blotchy red or blue. It has signs of poor circulation of blood.