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Optimization and application of UVC irradiation for prevention of fungal biodeterioration of vegetable tanned and chrome tanned leather

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Journal of Leather Science and Engineering 2022年第2期4卷 380-393页

作者： Eshita Jhahan Subarna Bhattacharyya anirban chaudhuri Nirmal Sarkar Shaheen Akhtar Punarbasu chaudhuri School of Environmental Studies Jadavpur UniversityKolkata 700032India Department of Environmental Science University of CalcuttaKolkataIndia.

UV-C irradiation critically effects the growth of micro-fungi and also deteriorate leather materials. In the present study vegetable tanned and chrome tanned leather were infected with pure cultures of Aspergillus niger and Aspergillus flavus, which were isolated from stored leather materials. UV-C light (λ = 254 nm) was applied on infected leather for 15 and 60 min. The changes in leather qualities were examined through weight, tensile strength, scanning electron microscope, energy dispersive X-ray and Fourier transform infrared spectroscopy study after 15 and 30 days of fungal inoculation. Vegetable tanned leather was more vulnerable in case of fungal attack than chrome tanned leather while A. flavus showed more influence on leather deterioration than A. niger. The results showed that weight loss after 30 days for 15 and 60 min irradiation exposure was 1.3% compared to A. flavus infected leather (3.93%). The tensile strength of vegetable and chrome tanned UV irradiated leather was increased by 44% and 7% respectively. The scanning electron microscopic images exhibit the limited presence of conidiophores in UV-C exposed leather which confirmed the potentiality of irradiation for controlling fungal growth. The infrared spectral analysis of UV-C exposed infected leather samples showed neither shifting of wavenumber nor displacement of any functional groups. Alto-gether the efficacy of UV-C irradiation against biodeterioration of leather was concluded to be effective. This method can be used to control fungal growth without compromising the leather quality.

关键词： Aspergillus Biodeterioration Leather SEM Tensile strength UV-C

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Unravelling the Complex Networks of Social Physics:Exploring Human Behavior,Big Data,and Distributed Systems

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Journal of Social Computing 2024年第2期5卷 165-179页

作者： Subrata Paul Dhritiman Mukherjee anirban Mitra Anuradha Mitra Pushan Kumar Dutta the Department of Computer Science and Engineering Brainware UniversityKolkata 700125India. the Department of Computer Science and Engineering Amity University KolkataKolkata 700135India the Department of Management University of LiverpoolLiverpoolL697ZXUK the Department of Electronics and Communication Engineering Amity University KolkataKolkata 700135India

Networks form an integral part of our daily lives, comprising structures known as nodes connected via ties. These networks exhibit a complex interplay of random and structured features. We encounter networks regularly in our daily activities, whether it is logging into websites, commuting by train, going to work, or attending school. Networks are prevalent in various academic disciplines and practical applications, spanning biology, physics, engineering, social science, and numerous other fields. The early 21st century has witnessed a rapid expansion of techniques facilitating human interaction, significantly impacting behavior and social bonding in both urban and rural settings. The availability and accessibility of extensive population datasets have spurred ongoing research into understanding and shaping human inclinations and sociological phenomena in unconventional ways. This review delves into the nuanced aspects of social physics, exploring the rationale behind choosing this research topic, various conceptual frameworks, categorizations, and distinctions between machine learning and deep learning. The article briefly outlines the advantages of leveraging big data in social physics, highlighting its transformative potential. Lastly, the authors provide insights into several applications of social physics in subsequent sections, offering a glimpse into its real-world implications.

关键词： networks social physics machine learning deep learning social science

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Novel wild edible mushroom Astraeus hygrometricus(Pers.)Morgan induces robust apoptosis on human acute lymphoblastic leukemia cells through a RONS-subsisted mitochondria-dependent pathway

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Journal of Traditional Chinese Medical Sciences 2024年第1期11卷 67-77页

作者： Amrita Pal Ribhu Ray anirban Chouni Subhadip Hajra Santanu Paul Department of Botany University of CalcuttaKolkata 700019India Department of Cancer Chemoprevention Chittaranjan National Cancer InstituteKolkata 700026India

Objective:To explore the therapeutic effects of the novel wild edible mushroom Astraeus hygrometricus(Pers.)Morgan(***)on human acute lymphoblastic leukemia ***:Extensive screening of the antiproliferative and chemopreventive potential of different extracts from 5 wild mushrooms,***,Phallus sp.,Lentinus sp.,Tricholoma sp.,and Serpula *** performed against a panel of 6 cancer cell lines and normal cells using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide(MTT)*** determination,cell cycle profiling,intracellular reactive oxygen species(ROS)and reactive nitrogen species(RNS),and mitochondrial membrane potential were analyzed by flow *** activity of caspases was measured colorimetrically,and the expression pattern of mitochondrial proteins was ***:The methanol extract of *** and MOLT-4 cells were identified as the most potent extract exhibiting antiproliferative activity and most sensitive cell line,*** mushroom extract induced robust selective apoptosis in MOLT-4 cells and arrested cell cycle progression at the G0/G1 *** extract disrupted the mitochondrial membrane potential and enhanced ROS production in MOLT-4 *** methanol extract induced apoptosis by downregulating the expression of Bcl-2,increasing the expression of Bax,and activating the caspase ***:The novel wild edible mushroom is a potential repository of biomolecules for the development of antileukemic drugs.

关键词： Mushroom Astraeus hygrometricus(Pers.)Morgan Apoptosis Antileukemic

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新型野生食用菌硬皮地星通过RONS介导线粒体依赖途径诱导人急性淋巴细胞白血病细胞的强凋亡（英文）

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Journal of Traditional Chinese Medical Sciences 2024年第1期 67-77+152页

作者： Amrita Pal Ribhu Ray anirban Chouni Subhadip Hajra Santanu Paul Department of Botany University of Calcutta Department of Cancer Chemoprevention Chittaranjan National Cancer Institute

目标:探讨新型野生食用菌硬皮地星（Astraeus hygrometricus）对人急性淋巴细胞白血病细胞的治疗作用。方法：采用3-(4,5-二甲基噻唑-2)-2,5-二苯基四氮唑溴盐(MTT)试验，对5种野生菌类（硬皮地星、竹荪、香菇、口蘑和干朽菌）的提取物... 详细信息

目标:探讨新型野生食用菌硬皮地星（Astraeus hygrometricus）对人急性淋巴细胞白血病细胞的治疗作用。方法：采用3-(4,5-二甲基噻唑-2)-2,5-二苯基四氮唑溴盐(MTT)试验，对5种野生菌类（硬皮地星、竹荪、香菇、口蘑和干朽菌）的提取物针对6种癌细胞系和正常细胞的抗增殖及化学预防的潜力进行了广泛筛选。采用流式细胞术分析细胞凋亡、细胞周期、细胞内活性氧(ROS)和活性氮(RNS)以及线粒体膜电位进行检测。采用比色法测定半胱天冬酶活性，分析线粒体蛋白的表达模式。结果：硬皮地星甲醇提取物的抗增殖活性最强，且MOLT-4细胞系最为敏感。菌类提取物可诱导MOLT-4细胞的强选择性凋亡，并在G0/G1期阻滞细胞周期进程。提取物可破坏线粒体膜电位，增强MOLT-4细胞的ROS生成。甲醇提取物通过下调Bcl-2的表达，增加Bax的表达，以及激活caspase级联反应来诱导细胞凋亡。结论：这种新型野生食用菌为抗白血病药物的开发提供了潜在的生物分子库。

关键词：菌类硬皮地星细胞凋亡抗白血病

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Adjustable Mechanism for Walking Robots with Minimum Number of Actuators

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Chinese Journal of Mechanical Engineering 2011年第5期24卷 760-766页

作者： GUHA anirban AMARNATH C Department of Mechanical Enginering Indian Institute of Technology Bombay

Recent literature on walking robots deals predominantly with multi-degrees-of-freedom leg mechanisms and machines capable of adopting several *** paper explores the other end of the spectrum suggesting mechanisms derived from a four bar coupler curve for a one degree of freedom walking *** of the walk indicates that body of the robot is able to move with low variation in *** best strategy for changing the gait to enable the robot to walk over obstacles and the effect of change in length of different links are explored to open up the possibility of a two degree of freedom walking robot with the capability of changing its gait,suitable as a low cost unit for several *** rugged units would permit the use of an IC engine as the primary source of power and could be of utility in installations where electronics may not be *** simple walking machines the foot of a leg is usually required to trace a D shaped curve with respect to the *** this paper we begin with a Hoecken mechanism capable of tracing such a *** foot is required to move parallel to itself and the same could be achieved using a six or eight link mechanism.A few such devices have been synthesized in this paper and their motion properties *** study also covers the possibility of providing adjustments to vary the step length and height of the foot＇s movement.

关键词： walking robot degree of freedom coupler curve gait

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Time-dependent diffusive interactions between dark matter and dark energy in the context of k-essence cosmology

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Research in Astronomy and Astrophysics 2021年第1期21卷 15-24页

作者： Abhijit Bandyopadhyay anirban Chatterjee Department of Physics Ramakrishna Mission Vivekananda Educational and Research InstituteBelur MathHowrah 711202India

We investigated the scenario of time-dependent diffusive interaction between dark matter and dark energy and showed that such a model can be accommodated within the observations of luminosity distanceredshift data in Supernova la(SN la)*** obtain constraints on different relevant parameters of this model from the observational *** consider a homogeneous scalar field(t)driven by a k-essence Lagrangian of the form L=V(φ)F(X)with constant potential V(φ)=V,to describe the dynamics of dark energy in this *** the temporal behaviour of the FRW scale factor,the equation of state and total energy density of the dark fluid,extracted from the analysis of SN la(JLA)data,we have obtained the time-dependence of the k-essence scalar field and also reconstructed the form of the function F(X)in the k-essence Lagrangian.

关键词： Dark Energy Dark Matter k-essence

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A Delay-dependent Dynamic Wide Area Damping Controller for Renewable Energy Integrated Power System Resilient to Communication Failure

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CSEE Journal of Power and Energy Systems 2023年第2期9卷 577-588页

作者： anirban Sengupta Dushmanta Kumar Das Bidyadhar Subudhi Department of Electrical and Electronics Engineering Sikkim Manipal Institute of TechnologySMUSIkkim737136 India Department of Electrical and Electronics Engineering National Institute of TechnologyNagalandDimapur797103 India School of Electrical Science Indian Institute of TechnologyGoaIndia

Integration of renewable energy sources(RES)with a conventional power system has a detrimental effect on interarea *** popular RESs are solar photovoltaic(PV)and wind energy conversion systems(WECS).Both solar PV power generation and WECS are integrated with power systems using a power electronic *** the amount of RES generation lead towards reduction of system damping,which leads towards inter-area ***,the intermittent behavior of a RES reduces the effectiveness of damping controllers.A dynamic controller based wide area damping controller(WADC)is proposed in this paper to increase small signal stability of a RES integrated power *** WADC is designed for contemplating delay in a communication channel,communication failure and *** anti-windup compensator is developed to overcome the effect of actuator ***,the gain of the anti-windup compensator is calculated using LyapunovKrasovskii functional(LKF)in terms of linear matrix inequality(LMI).The actuator considered in this paper is a unified power flow controller(UPFC).Efficacy of PV and wind power integration on power system is also *** efficacy of the developed dynamic controller is verified using IEEE 39 bus and 68 bus power system.

关键词： Actuator saturation communication failure linear matrix inequality renewable energy sources time delay wide area damping control

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Development of the Berezin Number Inequalities

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Acta Mathematica Sinica,English Series 2023年第7期39卷 1219-1228页

作者： Pintu BHUNIA anirban SEN Kallol PAUL Department of Mathematics Jadavpur UniversityKolkata 700032West BengalIndia

We present new bounds for the Berezin number inequalities which improve on the existing *** also obtain bounds for the Berezin norm of operators as well as the sum of two operators.

关键词： Berezin symbol Berezin number reproducing kernel Hilbert space

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Geochemistry of Harappan potteries from Kalibangan and sediments in the Ghaggar River： Clues for a dying river

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Geoscience Frontiers 2018年第4期9卷 1203-1211页

作者： anirban Chatterjee Jyotiranjan S.Ray Physical Research Laboratory Ahmedabad India

The ephemeral Ghaggar-Hakra River of northwestern India has always been considered to be the remnant of an ancient perennial glacier-fed river（Vedic Saraswati）. The exact reason and timing of major hydrological change of this river remains speculative. The river＇s purported association with the zenith of the Harappan civilisation remains a conjecture because the timings of its fluvial past are still being debated. In this study we have made an attempt to resolve this issue using geochemical provenance of sediments from some dated horizons in the Ghaggar flood plain and that of the material used in the potteries from the Mature Harappan period（4600-3900 yr BP） at Kalibangan. Sampled sedimentary horizons were dated by radiocarbon and optically stimulated luminescence（OSL） methods. Results of our study from the Ghaggar alluvium indicate that the river did have glacial sources during the early Holocene. However, the data from the potteries suggest that during the Mature Harappan period, the sediments in the Ghaggar as used by the potters did not have a higher Himalayan provenance and hence, were not derived from glaciated *** findings imply that during the time of the Mature Harappans the Ghaggar had already become a foothill-fed river.

关键词： Ghaggar alluvium Holocene Sediment provenance Mature Harappan pottery Geochemistry Vedic Saraswati

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Identification and expression profiling of Vigna mungo microRNAs from leaf small RNA transcriptome by deep sequencing

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Journal of Integrative Plant Biology 2014年第1期56卷 15-23页

作者： Sujay Paul anirban Kundu Amita Pal Division of Plant Biology Bose Institute Center for Genomic Sciences National Autonomous University of Mexico

MicroRNAs （miRNAs） represent a class of small non-coding RNA molecules that play a crucial role in post- transcriptional gene regulation. Several conserved and species-specific miRNAs have been characterized to date, predominantly from the plant species whose genome is well characterized. However, information on the variability of these regulatory RNAs in economically important but genetically less characterized crop species are limited. Vigna mungo is an important grain legume, which is grown primarily for its protein-rich edible seeds, miRNAs from this species have not been identified to date due to lack of genome sequence information. To identify miRNAs from V. mungo, a small RNA library was constructed from young leaves. High- throughput IIlumina sequencing technology and bioinformat- ic analysis of the small RNA reads led to the identification of 66 miRNA loci represented by 45 conserved miRNAs belonging to 19 families and eight non-conserved miRNAs belonging to seven families. Besides, 13 novel miRNA candidates in V. mungo were also identified. Expressior patterns of selected conserved, non-conserved, and nove miRNA candidates have been demonstrated in leaf, stem, ant root tissues by quantitative polymerase chain reaction, ant potential target genes were predicted for most of the conserved miRNAs. This information offers genomic resour ces for better understanding of miRNA mediated post transcriptional gene regulation.

关键词： Illumina microRNA next generation sequencing quantitative polymerase chain reaction target transcript

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