Three-year black carbon aerosol synthesis over a pristine location surrounded by hillocks in Haryana state, India.

The three-year Black Carbon (BC) aerosol measurements made during 2020, 2021, and 2022 over a rural location, namely, Panchgaon, surrounded by Aravali hillocks (elevation of about 400-600 m) have been analyzed with an aim to determine their optical and radiative characteristics, seasonal and long-term variations in mass concentration. The affinity between these parameters and associated pollutants and planetary boundary layer height (PBLH), affected by the orography, to delineate their role in mass concentration changes with time have been investigated. The coincident OPAC (Optical Properties of Aerosols and Clouds) Model-derived aerosol optical depth (AOD), and single scattering albedo (SSA) have been compared with the observed BC mass concentration, and also with synchronous satellite measurements.

Organoselenium ligands for heterogeneous and nanocatalytic systems: development and applications.

Organoselenium ligands have attracted great attention among researchers during the past two decades. Various homogeneous, heterogeneous and nanocatalytic systems have been designed using such ligands. Although reports on selenium ligated homogeneous catalysts are quite high in number, significant work has also been done on the development of heterogeneous and nanocatalytic systems using organoselenium ligands.

Improved air quality during COVID-19 at an urban megacity over the Indo-Gangetic Basin: From stringent to relaxed lockdown phases.

The enforced lockdown amid COVID-19 pandemic eased anthropogenic activities across India. The satellite-derived aerosol optical depth (AOD) and absorption AOD showed a significant reduction of ~30% over the Indo-Gangetic Basin (IGB) in north India during the lockdown period in 2020 with respect to the previous year 2019, when no such lockdown was in effect. Further, near-surface air pollutants were investigated at an urban megacity Delhi during 01 March to 31 May 2020.

Catalytically active nanosized PdTe (telluropalladinite) and PdTe (kotulskite) alloys: first precursor-architecture controlled synthesis using palladium complexes of organotellurium compounds as single source precursors.

Several intermetallic binary phases of Pd-Te including PdTe, PdTe, PdTe, PdTe, PdTe, PdTe, PdTe, PdTe, PdTe, PdTe, PdTe and PdTe are known, and negligible work (except few studies on PdTe) has been done on exploring applications of such phases and their fabrication at nanoscale. Hence, Pd(ii) complexes Pd(L1)Cl and Pd(L2-H)Cl (L1): Ph-Te-CH-CH-NH and L2: HO-2-CH-CH[double bond, length as m-dash]N-CHCH-Te-Ph were synthesized. Under similar thermolytic conditions, complex Pd(L1)Cl with bidentate coordination mode of ligand provided nanostructures of PdTe (telluropalladinite) whereas Pd(L2-H)Cl with tridentate coordination mode of ligand yielded PdTe (kotulskite).

Green Synthesis of Copper Oxide Nanoparticles using Cucumis Sativus (Cucumber) Extracts and their Bio-Physical and Biochemical Characterization for Cosmetic and Dermatologic Applications.

Background & Objective: Nanoparticles are used in cosmetic and dermatologic products, due to better skin penetration properties. Incorporation of natural products exhibiting medicinal properties in nano-preparations could significantly improve the efficacy of these products and improve the quality of life without the side effects of synthetic formulations.

Methods: We here report the green synthesis of Copper Oxide nanoparticles, using Cucumber extract, and their detailed bio-physical and bio-chemical characterization.