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In this section of Resonance, we invite readers to pose questions likely to be raised in a classroom situation. We may suggest strategies for dealing with them, or invite responses, or both. “Classroom” is equally a forum for raising broader issues and sharing personal experiences and viewpoints on matters related to teaching and learning science.
Marin Mersenne was many things: scientist, mathematician and writer. He did original work on acoustics and on prime numbers; today his name is linked to a family of primes called ‘Mersenne primes’. But his greatest contribution was his work in propagating a culture of scientific inquiry in Europe — a culture which emphasized communication and dissemination and learning from one’s peers. The work done...
Global warming has become a matter of concern for all living beings on earth. Electricity generation to meet our growing power demand is the main cause for it. About 80% of the electricity generated around the world is by combusting fossil fuels. This process emits greenhouse gases that are responsible for global warming. The present levels of greenhouse gases like CO2, NOX, methane, CFC and HCFC...
The Large Hadron Collider (LHC) at CERN — the most expensive and complex instrument mankind has ever built to address some of the most fundamental questions of Nature — is colliding proton-on-proton at high energy since November 2009. The full data set delivered by the LHC over the last 4 years has been analyzed by the ATLAS and CMS experiments in their pursuit of the Higgs boson, the particle responsible...
Plant Growth Promoting Rhizobacteria (PGPR) are a group of bacteria that enhances plant growth and yield via various plant growth promoting substances as well as biofertilizers. Given the negative environmental impact of artificial fertilizers and their increasing costs, the use of beneficial soil microorganisms such as PGPR for sustainable and safe agriculture has increased globally during the last...
In this article, we provide a bird’s-eye view of the discovery of a new particle at CERN in Geneva, which very much seems like the long sought-after Higgs boson. We conclude on a celebratory note of the Indian connection to this epochmaking discovery.
The identification of the occurrence of a material which has a structure that is ordered but not periodic in an electron diffraction work triggered a sensational discovery in 1984. It was found that a rapidly solidified alloy of Al with 10–14% Mn possesses an icosahedral symmetry in combination with long-range order. The discovery of such aperiodic forms has resulted in rewriting the basics of crystallography...
European explorers of the New World brought back to Europe exotic specimens of plant and animal origin. One of these was curare, the arrow poison used by the natives of the Orinoco and the Amazon river basins mainly to capture birds and animals for food. Three types of curare were known, namely tubocurare, calabash curare and pot curare. The main plant component of tubocurare was identified as the...
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