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10. Distribution of Arsenic in Rice Grain from West Bengal, India: Its Relevance to Geographical Origin, Variety, Cultivars and Cultivation Season

Author

Chowdhury, Nilanjana Roy, Das, Antara, Joardar, Madhurima, Mridha, Deepanjan, De, Ayan, Majumder, Sharmistha, Mandal, Jajati, Majumdar, Arnab, Roychowdhury, Tarit, Förstner, Ulrich, Series Editor, Rulkens, Wim H., Series Editor, Niazi, Nabeel Khan, editor, Bibi, Irshad, editor, and Aftab, Tariq, editor

Published
2023
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47. Development of a bisphenol A based chemosensor for Al3+and its application in cell imaging and plant root imagingElectronic supplementary information (ESI) available. See DOI: https://doi.org/10.1039/d4ay01058b

Author

Bari, Sibshankar, Maity, Dinesh, Mridha, Deepanjan, Roychowdhury, Tarit, Ghosh, Pritam, and Roy, Partha

Abstract

Bisphenol A is a fluorophoric platform that is used to develop chemosensors for various species. Herein, we report a bisphenol A based Schiff-base molecule, 4,4′-(propane-2,2-diyl)bis(2-((E)-((2-hydroxy-5-methylphenyl)imino)methyl)phenol) (Me-H4L), as a selective chemosensor for Al3+. Among the several metal ions, it shows a significant increment in its fluorescence intensity (50 fold) at 535 nm in the presence of Al3+ions. The enhanced fluorescence was attributed to the CHEFF mechanism and inhibition of CN isomerization. The limit of detection value of Me-H4L for Al3+was determined to be 9.65 μM. Its quantum yield and lifetime increased considerably in the presence of the cation. Some theoretical calculations were performed to explain the interaction between Al3+and the probe. Furthermore, Me-H4L was applied in cell imaging studies using animal cells and plant roots.

Published
2024
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49. Significance of the prime factors regulating arsenic toxicity and associated health risk: a hypothesis-based investigation in a critically exposed population of West Bengal, India.

Author

Das, Antara, Joardar, Madhurima, Chowdhury, Nilanjana Roy, Mridha, Deepanjan, De, Ayan, Majumder, Sharmistha, Das, Jagyashila, Majumdar, Kunal Kanti, and Roychowdhury, Tarit

Subjects
ARSENIC poisoning, PRINCIPAL components analysis, ARSENIC in water, WELLS, CLUSTER analysis (Statistics), DRINKING water, BIOMARKERS
Abstract

The suffering from arsenic toxicity is a long-standing concern in Asian countries. The role of the key factors (arsenic intake, age and sex) regulating arsenic toxicity is aimed to evaluate for a severely exposed population from Murshidabad district, West Bengal. Mean arsenic concentrations in drinking water supplied through tube well, Sajaldhara treatment plant and pipeline were observed as 208, 27 and 54 µg/l, respectively. Urinary arsenic concentration had been observed as < 3–42.1, < 3–56.2 and < 3–80 µg/l in children, teenagers and adults, respectively. Mean concentrations of hair and nail arsenic were found to be 0.84 and 2.38 mg/kg; 3.07 and 6.18 mg/kg; and 4.41 and 9.07 mg/kg, respectively, for the studied age-groups. Water arsenic was found to be associated with hair and nail (r = 0.57 and 0.60), higher than urine (r = 0.37). Arsenic deposition in biomarkers appeared to be dependent on age; however, it is independent of sex. Principal component analysis showed a direct relationship between dietary intake of arsenic and chronic biomarkers. Nail was proved as the most fitted biomarker of arsenic toxicity by Dunn's post hoc test. Monte Carlo sensitivity analysis and cluster analysis showed that the most significant factor regulating health risk is 'concentration of arsenic' than 'exposure duration', 'body weight' and 'intake rate'. The contribution of arsenic concentration towards calculated health risk was highest in teenagers (45.5–61.2%), followed by adults (47.8–49%) and children (21–27.6%). Regular and sufficient access to arsenic-safe drinking water is an immediate need for the affected population. [ABSTRACT FROM AUTHOR]

Published
2023
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50. Imaging of Al3+ in plant roots by the interaction with a bisphenol A-based chemosensor.

Author

Bari, Sibshankar, Mridha, Deepanjan, Ghosh, Sneha, Ghosh, Pritam, Roychowdhury, Tarit, and Roy, Partha

Subjects
*PLANT roots, *ALUMINUM forming, *BINDING constant, *CONDENSATION reactions, *METAL ions, *TOXICOLOGY of aluminum
Abstract

Al3+ ions are considered to be the most toxic form of aluminum for plant roots. To identify this metal ion in roots, a molecule, 4,40-(propane-2,2-diyl)bis(2-((E)-(2-hydroxyphenylimino)methyl)phenol) (H4L), has been synthesized from the condensation reaction between 5,50-(propane-2,2-diyl)bis(2-hydroxybenzaldehyde) and 2-aminophenol. H4L shows a 470-fold increase in its fluorescence intensity at 519 nm in the presence of two eq. of Al3+ ions in 10 ̲M HEPES buffer in H2O/DMF = 4: 1 (v/v) (pH 7.4). It forms a 1: 2 complex with Al3+ with an association constant value of 6.95 x 108 M-2. Its quantum yield increased from 0.003 to 0.530 on complexation. The LOD value of the probe was determined to be 4.6 x 107 M, indicating its high sensitivity towards Al3+. This probe has been used for the imaging of aluminum ions in rice (Oryza sativa). [ABSTRACT FROM AUTHOR]

Published
2023
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