In this digital age, ruled by smartphone apps, how about one to tell you how fresh your milk is? Although there are stringent safety rules concerning the quality of milk, almost 68% of what is available in the country does not conform to them. In a recent study, researchers at the Indian Institute of Technology Guwahati have come up with a paper-based detection system to detect if a sample of milk is pasteurised and fresh. This technique, they say, is cost-effective, rapid, user- and environment-friendly.

Researchers from ICAR-Indian Institute of Wheat & Barley Research, Karnal, and ICAR-Indian Agricultural Statistics Research Institute, New Delhi, have proposed a faster and reliable approach to identify different varieties of wheat. Using a mix of software engineering, mobile application development and genetic analysis, they have developed a new web-based server called VISTa—the first-ever plant variety identification system in the world—to identify wheat varieties.

All the electronic devices that we use today have components made of semiconductors, mostly silicon. In recent years, gallium nitride, another semiconductor, is making its way into electronics. It is better suited for high power and high-frequency applications. Researchers from IISc have developed India’s first-ever e-mode gallium nitride power transistor, whose performance is comparable to some of the best reports till date.

On April 26 2019, scientists at the Laser Interferometer Gravitational-Wave Observatory (LIGO) and the Virgo Interferometer detected gravitational waves from a possible black hole-neutron star collision thought to have taken place 1.2 billion light years away. The event was observed by both LIGO observatories, based in Louisiana and Washington state in the USA, and the Virgo facility based in the European Gravitational Observatory (EGO) in Italy.