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Organophosphate pesticides an emerging environmental contaminant: Pollution, toxicity, bioremediation progress, and remaining challenges

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Journal of Environmental Sciences 2023年第5期127卷 234-250页

作者： Himanshu Mali chandni shah B.H.Raghunandan Anil S.Prajapati Darshan H.Patel Ujjval Trivedi R.B.Subramanian P.G.Department of Biosciences UGC-Centre of Advanced StudiesSatellite CampusSardar Patel UniversitySardar Patel MaidanBakrol-Vadtal RoadBakrol 388315GujaratIndia Charotar Institute of Paramedical Sciences Charotar University of Science and Technology(CHARUSAT)Changa 388421GujaratIndia

Organophosphates(OPs)are an integral part of modern agriculture;however,due to overexploitation,OPs pesticides residues are leaching and accumulating in the soil,and groundwater contaminated terrestrial and aquatic food webs.Acute exposure to OPs could produce toxicity in insects,plants,animals,and humans.OPs are known for covalent inhibition of acetylcholinesterase enzyme in pests and terrestrial/aquatic organisms,leading to nervous,respiratory,reproductive,and hepatic abnormalities.OPs pesticides also disrupt the growth-promoting machinery in plants by inhibiting key enzymes,permeability,and trans-cuticular diffusion,which is crucial for plant growth.Excessive use of OPs,directly/indirectly affecting human/environmental health,raise a thoughtful global concern.Developing a safe,reliable,economical,and eco-friendly methods for removing OPs pesticides from the environment is thus necessary.Bioremediation techniques coupled with microbes or microbial-biocatalysts are emerging as promising antidotes for OPs pesticides.Here,we comprehensively review the current scenario of OPs pollution,their toxicity(at a molecular level),and the recent advancements in biotechnology(modified biocatalytic systems)for detection,decontamination,and bioremediation of OP-pesticides in polluted environments.Furthermore,the review focuses on onsite applications of OPs degrading enzymes(immobilizations/biosensors/others),and it also highlights remaining challenges with future approaches.

关键词： Organophosphorus compounds Toxicity Bioremediation Microorganisms Enzymes Biosensors

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Spectroscopic properties of Δ baryons

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Chinese Physics C 2021年第2期45卷 119-125页

作者： chandni Menapara Zalak shah Ajay Kumar Rai Department of Applied Physics Sardar Vallabhbhai National Institute of TechnologySurat-395007GujaratIndia

The resonance state of theΔ baryon,which exists in four isospin(I=3/2)states,has been studied using the hypercentral constituent quark model(hCQM)with a simple linear potential with added first order correction.The calculated data ranges for 1S-5S,1P-5P,1D-4D and 1F-2F are given,with possible spin-parity assignments for all the states.The magnetic moments have also been obtained for all four configurations.TheN\pidecay channel width has been calculated for a few states.The linear nature of the data has been verified through Regge trajectories.

关键词： mass spectra light baryon magnetic moment Regge trajectory

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