Hotspot driven air pollution during crop residue burning season in the Indo-Gangetic Plain, India.

Intensive crop residue burning (CRB) in northern India triggers severe air pollution episodes over the Indo-Gangetic Plain (IGP) each year during October and November. We have quantified the contribution of hotspot districts (HSDs) and total CRB to poor air quality over the IGP. Initially, we investigated the spatiotemporal distribution of CRB fire within the domain and pinpointed five HSD in each Punjab and Haryana.

Drivers of air pollution variability during second wave of COVID-19 in Delhi, India.

To curb the 2nd wave of COVID-19 disease in April-May 2021, a night curfew followed by full lockdown was imposed over the National Capital Territory, Delhi. We have analyzed the observed variation in pollutants and meteorology, and role of local and transboundary emission sources during night-curfew and lockdown, as compared to pre-lockdown period and identical periods of 2020 lockdown as well as of 2018 and 2019. In 2021, concentration of pollutants (except O₃, SO₂, and toluene) declined by 4-16% during night-curfew as compared to the pre-lockdown period but these changes are not statistically significant.

Spatial and Temporal Variation of Atmospheric Particulate Matter in Bangalore: A Technology-Intensive Region in India.

All of India's megacities are experiencing acute air pollution problems due to the accelerated urbanization/industrialization and rapid economic growth. Nowadays, environmental pollution due to particulate matter is a major threat to human health and our regional air quality. Long-term air pollution data with the high spatial and temporal resolution are required to understand regional air quality and its effects on environmental degradation and human health.

Chemopreventive and anti-breast cancer activity of compounds isolated from leaves of L.

The present study focuses on isolation and evaluation of the anti-cancer activity of compounds from the leaves of . The bioassay-directed strategy was adopted using chromatographic, gas chromatographic-mass spectrum analysis, nuclear magnetic resonance and X-ray crystallography techniques for purification and characterization of active cytotoxic compounds. Further, MDA-MB-231 breast cancer cell lines and 7,12-dimethylbenz (a) anthracene (DMBA) induced virgin female Sprague Dawley (SD) rats were used for in vitro and in vivo cytotoxicity evaluation.