W AKTAR

D SENGUPTA

A CHOWDHURY

Fulltext

University of Calcutta (informally known as Calcutta University or CU) is a collegiate public state university located in Kolkata, West Bengal, India.&nbsp;Within India it is recognized as a &quot;Five-Star University&quot; and accredited &quot;A&quot; Grade by National Assessment and Accreditation Council.

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The University of Calcutta has secured the Fifth position among the Universities of India in the prestigious &quot;Indian University Ranking 2019&quot; list, released by the NIRF of the Ministry of Human Resource Development, Government of India.

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It was established on 24 January 1857, and was one of the first institutions in Asia to be established as a multidisciplinary and Western-style university. Its alumni and faculty include several heads of state, heads of government, social reformers, prominent artists, only academy award winner and Dirac medal winner in India, many Fellows of the Royal Society and five Nobel laureates as of 2019 which is highest in South Asia.

University Of Calcutta

Interdisciplinary Toxicology

Present study reveals the low concentrations (∼4 ppm) of pesticide sensing vis-à-vis degradation of pesticides with the help of nontoxic zinc oxide quantum dots (QD). In our study, we have taken four different pesticides viz., aldrin, tetradifon, glyphosate, and atrazine, which are widely used in agriculture and have structural dissimilarities/diversity. By using optical sensing techniques such as steady state and time-resolved fluorescence, we have analyzed the detailed exciton dynamics of QD in the presence of different pesticides. It has been found that the pesticide containing good leaving groups (-Cl) can interact with QD promptly and has high binding affinity (∼107 M-1). The different binding signatures of QD with different pesticides enable us to differentiate between the pesticides. Time resolved fluorescence spectroscopy provides significant variance (∼150-300 ns) for different pesticides. Furthermore, a large variation (105 Ω to 7 × 104 Ω) in the resistance of QD in the presence of different pesticides was revealed by electrochemical sensing technique. Moreover, during the interaction with pesticides, QD can also act as a photocatalyst to degrade pesticides. Present investigation explored the fact that the rate of degradation is positively affected by the binding affinity, i.e., the greater the binding, the greater is the degradation. What is more, both optical and electrochemical measurements of QD, in tandem, as described in our study could be utilized as the pattern recognition sensor for detection of several pesticides. © 2017 American Chemical Society.

Journal of Agricultural and Food Chemistry

Nanosensing of Pesticides by Zinc Oxide Quantum Dot: An Optical and Electrochemical Approach for the Detection of Pesticides in Water

Lecture Notes on Multidisciplinary Industrial Engineering Emerging Technologies for Agriculture and Environment

Monitoring Quality of Tap Water in Cities Using IoT

Study of Lightweight Mortar by Replacing Cement and Aggregates with Admixtures

Development of Bio-hybrid Tractor for Farming Applications

Lecture Notes on Multidisciplinary Industrial Engineering

Emerging Technologies for Agriculture and Environment

Technologies for Upgrading Existing or Designing New Drinking Water Treatment Facilities

Journal of Environmental Biology

Influence of integrated crop management practices on yield, PAR interception, resource-use-efficiency and energetics in pigeonpea in North Indian Plains

C&EN Global Enterprise

US EPA proposes to regulate 4 toxic substances

Series on Pesticides and Biocides

Guidance Document on Botanical Active Substances Used in Plant Protection Products

Bioscience Biotechnology Research Communications

Myxosporidian parasites of the genus Thelohanellus from different freshwater fi shes of Washim, Maharashtra region

Impact of pesticides use in agriculture: Their benefits and hazards

Journal	Interdisciplinary Toxicology
Publisher	-
ISSN	1337-6853
Open Access	Yes