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(Catecholate)Cu^(I)_(2)-Displayed Porous Organic Polymers as Efficient Heterogeneous Catalysts for the Mild and Selective Aerobic Oxidation of Alcohols

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CCS Chemistry 2023年第2期5卷 445-454页

作者： Youlong Zhu debabrata mukherjee Theodore R.Helgert SonBinh T.Nguyen Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education School of ChemistrySun Yat-sen UniversityGuangzhou 510006 Chemical Sciences and Engineering Division Argonne National LaboratoryArgonneIL 60439 Department of Chemistry International Institute for NanotechnologyNorthwestern UniversityEvanstonIL 60208

Porous organic polymers(POPs)containing catalytically active sites are of paramount importance for heterogeneous ***,the catalytically active sites of reported POPs are mostly limited to mononuclear metal ***,we report the reaction between catechol-containing POPs(Cat-POPs)and[CuIMes]n to afford the corresponding Cu^(I)_(2)-CatPOPs with a putative vicinal binuclear(catecholate)Cu^(I)_(2)*** resulting Cu^(I)_(2)-CatPOPs exhibit high Brunauer–Emmett–Teller surface areas,good stability,and excellent catalytic activity toward the aerobic oxidation of a broad range of primary and secondary alcohols under mild conditions,with either 2,2,6,6-tetramethylpiperidinyl-N-oxyl or 9-azabicyclo[3.3.0]nonane-N-oxyl as the *** green aerobic oxidation catalysts,the Cu^(I)_(2)-CatPOPs are much more active than the correspondingmononuclear CuIICatPOPs,where each catecholate moiety only supports one CuII center;CuI-ConPOPs,where the binding sites for CuI is a nonvicinal 1,4-dihydroxybenzene moiety;and the homogeneous analogue(3,6-di-tert-butyl catecholate)Cu^(I)_(2).These results are consistent with a proposed vicinal binuclear Cu^(I)_(2)structure that can efficiently activate molecular oxygen for the aerobic oxidation of alcohols,mechanistically similar to that observed in dicopper-containing *** results demonstrate the facile preparation of POPs with binuclear catalytically active sites that function as green heterogeneous catalysts for efficient oxidation of alcohols.

关键词： porous organic polymers binuclear copper(I) heterogeneous catalysis aerobic oxidation green chemistry

Spatio-temporal variation and relationship between agricultural efficiency and irrigation intensity in a semi-arid region of India

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Regional Sustainability 2024年第2期5卷 123-139页

作者： Shibu DAS Kaushal Kumar SHARMA Suranjan MAJUMDER debabrata DAS Indrajit Roy CHOWDHURY Centre for the Study of Regional Development School of Social SciencesJawaharlal Nehru UniversityNew Delhi110067India Department of Geography&Applied Geography University of North BengalDarjeeling734013India Geography Department of Krishnagar Government College Krishnagar741101India

A surging population in Karnataka State,a semi-arid region in India,poses a threat to both food security and livelihood sustainability,necessitating a concentrated effort to bolster agricultural efficiency and achieve United Naton’s Sustainable Development Goal 2(zero hunger).Therefore,in order to address the pressing issue of food scarcity in Karnataka,this study meticulously examined the spatio-temporal variation of agricultural efficiency and irrigation intensity in Karnataka,uncovering its significant dependence of agricultural efficiency on irrigation ***,this study used a one-way analysis of variance(ANOVA)to ascertain significant differences in the means of agricultural efficiency and irrigation intensity during 2004-2005 and *** study showed that the maximum improvement in agricultural efficiency index was recorded in Belgaum(40.24),Gulbarga(24.77),and Yadgir districts(22.92)between 2004-2005 and 2018-2019,which indicated the progressing trend and better scope for agriculture *** the contrary,some districts expressed threat(a decline of above 20.00 of agricultural efficiency index)and needed special care for the improvement of agricultural efficiency in four northern districts(Bagalkot,Bidar,Raichur,and Bijapur),three southern districts(Chitradurga,Chikballapur and Hassan),and two southern districts(Koppal and Gadag)in *** 2004-2005,irrigation intensity varied from 3.19%to 56.39%,with the lowest irrigation intensity in Kodagu District and the highest irrigation intensity in Shimoga *** 2018-2019,irrigation intensity changed from 0.77%to 72.77%,with the lowest irrigation intensity in Kodagu District and the highest in Dakshin Kannad ***,the research scrutinized the complex relationship between agricultural efficiency and irrigation intensity,with the correlation coefficient increased from 0.162 during 2004-2005 to 0.255 during *** implies that in both periods,a low positive

关键词： Agricultural efficiency Irrigation intensity One-way analysis of variance(ANOVA) Food security Karnataka

ITPK1 is an InsP_(6)/ADP phosphotransferase that controls phosphate signaling in Arabidopsis

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Molecular Plant 2024年第7期17卷 1151-1157页

作者： Esther Riemer Danye Qiu debabrata Laha Robert K.Harmel Philipp Gaugler Verena Gaugler Michael Frei Mohammad-Reza Hajirezaei Nargis Parvin Laha Lukas Krusenbaum Robin Schneider Adolfo Saiardi Dorothea Fiedler Henning J.Jessen Gabriel Schaaf Ricardo F.H.Giehi 不详

(Molecular Plant 14,1864-1880;November 12021)We identified a mistake made when calculating the absolute concentrations of inositol(pyro)phosphates derived from CE-ESl-MS measurements reported in the originally published version of our *** to a calculation error when determining concentrations per fresh biomass,the absolute values shown in the manuscript are approximately 30-fold lower than they should *** mistake affects Figures 2D,3C,4C,and 7D and Figures S4,S11B,S13,and *** all conclusions made in the article referred to relative differences between genotypes and treatments,they remained unaffected by these mistakes.

关键词： ipt Arabidopsis absolute

Flooding Tolerance in Rice:Focus on Mechanisms and Approaches

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Rice science 2021年第1期28卷 43-57页

作者： debabrata Panda Jijnasa Barik Department of Biodiversity and Conservation of Natural Resources Central University of OdishaKoraput 764021OdishaIndia

Flooding is one of the most hazardous natural disasters and a major stress constraint to rice production throughout the world,which results in huge economic *** one-fourth of the global rice crops(approximately 40 million hectares)are grown in rainfed lowland plots that are prone to seasonal flooding.A great progress has been made during last two decades in our understanding of the mechanisms involved in adaptation and tolerance to flooding/submergence in *** this review,we summarized the physiological and molecular mechanisms that contribute to tolerance of flooding/submergence in *** also covered various features of flooding stress with special reference to rice plants,*** types of flooding stress,environmental characterisation of flood water,impact of flooding stress on rice plant and their morphological,physiological and metabolic responses under flooding.A brief discussion on the tolerance mechanism in rice exhibited to different types of flooding will be focused for the future crop improvement programme for development of flooding tolerant rice variety.

关键词： flooding stress submergence tolerance Sub1 rice

Hybrid Approach to Document Anomaly Detection:An Application to Facilitate RPA in Title Insurance

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International Journal of Automation and computing 2021年第1期18卷 55-72页

作者： Abhijit Guha debabrata Samanta Data Science Department CHRIST(Deemed to be University)Bangalore 560029India First American India Private Ltd. Bangalore 560038India Computer Science Department CHRIST(Deemed to be University)Bangalore 560029India

Anomaly detection(AD)is an important aspect of various domains and title insurance(TI)is no *** process automation(RPA)is taking over manual tasks in TI business processes,but it has its limitations without the support of artificial intelligence(AI)and machine learning(ML).With increasing data dimensionality and in composite population scenarios,the complexity of detecting anomalies increases and AD in automated document management systems(ADMS)is the least explored *** learning,being the fastest maturing technology can be combined along with traditional anomaly detectors to facilitate and improve the RPAs in *** present a hybrid model for AD,using autoencoders(AE)and a one-class support vector machine(OSVM).In the present study,OSVM receives input features representing real-time documents from the TI business,orchestrated and with dimensions reduced by *** results obtained from multiple experiments are comparable with traditional methods and within a business acceptable range,regarding accuracy and performance.

关键词： Anomaly detection title insurance autoencoder one-class support vector machine(OSVM) term frequency-inverse document frequency(TF-IDF) robotic process automation dimensionality reduction

Assessing compressive strengths of mortar and concrete from digital images by machine learning techniques

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Frontiers of Structural and Civil Engineering 2022年第3期16卷 347-358页

作者： Amit SHIULY debabrata DUTTA Achintya MONDAL Civil Engineering Department Jadavpur UniversityJadavpur 700032India Civil Engineering Department Camellia School of Engineering and TechnologyBarasat 700124India

Compressive strength is the most important metric of concrete *** nondestructive and semi-destructive tests can be used to evaluate the compressive strength of *** the present study,a new image-based machine learning method is used to predict concrete compressive strength,including evaluation of six different *** include support-vector machine model and various deep convolutional neural network models,namely AlexNet,GoogleNet,VGG19,ResNet,and *** the present investigation,cement mortar samples were prepared using each of the cement:sand ratios of 1:3,1:4,and 1:5,and using the water:cement ratios of 0.35 and *** concrete was prepared using the cement:sand:coarse aggregate ratios of 1:5:10,1:3:6,1:2:4,1:1.5:3 and 1:1:2,using the water:cement ratio of 0.5 for all *** samples were cut,and several images of the cut surfaces were captured at various zoom levels using a digital *** samples were then tested destructively for compressive *** images and corresponding compressive strength were then used to train machine learning models to allow them to predict compressive strength based upon the image *** Inception-ResNet-V2 models exhibited the best predictions of compressive strength among the models ***,the present findings validated the use of machine learning models as an efficient means of estimating cement mortar and concrete compressive strengths based on digital microscopic images,as an alternative nondestructive/semi-destructive test method that could be applied at relatively less expense.

关键词： support vector machine deep convolutional neural network microscope digital image curing period

Germplasm Resources,Genes and Perspective for Aromatic Rice

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Rice science 2023年第4期30卷 294-305页

作者： Prafulla Kumar BEHERA debabrata PANDA Department of Biodiversity and Conservation of Natural Resources Central University of OdishaKoraput 764003OdishaIndia

Aromatic rice is considered an important commodity in the global market because of its strong aroma and eating and cooking *** countries,such as India and Pakistan,are the leading traders of Basmati rice,whereas Thailand is the major supplier of Jasmine rice in the international *** strong aroma of rice is associated with more than 300 volatile compounds,among which 2-acetyl-1-pyrroline(2-AP)is the principal component.2-AP is a phenotypic expression of spontaneous mutations in the recessive gene OsBadh2 or *** present review focuses on the origin,evolution and diversity of genetic resources of aromatic rice available worldwide.A brief discussion is presented on the genes responsible for quality traits along with details of their molecular *** compilation and discussion will be useful for future breeding programs and the biofortification of quality traits of aromatic rice to ensure food security and nutritional need.

关键词： aromatic rice 2-acetyl-1-pyrroline polyamine degradation pathway quality trait

Label-free colorimetric estimation of proteins using nanoparticles of silver

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Nano-Micro Letters 2010年第3期2卷 164-168页

作者： Siddhartha Shrivastava debabrata Dash Department of Biochemistry Institute of Medical SciencesBanaras Hindu University

Metallic nanoparticles have received considerable attention in bioassays and diagnostics due to their unique surface plasmon resonance(SPR) *** nanoparticles have been employed for the development of SPR-based colorimetric *** the present report we have described a sensitive colorimetric approach for estimation of proteins,within a detection limit of 10?80 μg/m L,using unmodified silver *** the common advantages of colorimetric assay such as simplicity,high sensitivity,and low cost,our method has a label-free design and provides an important and attractive alternative to classical sensing probes and *** present work will contribute to the development of nanotechnology-based diagnostic tools.

关键词： Silver nanoparticles Agglutination Surface plasmon resonance Colorimetric estimation Bovine serum albumin Immunoglobulin

Leaf Traits and Antioxidant Defense for Drought Tolerance During Early Growth Stage in Some Popular Traditional Rice Landraces from Koraput, India

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Rice science 2017年第4期24卷 207-217页

作者： Swati Sakambari MISHRA debabrata PANDA Department of Biodiversity and Conservation of Natural Resources Central University of Orissa Koraput 764021 Odisha India

Three popular traditional rice landraces, namely Kalajeera, Machakanta and Haladichudi, from Koraput, India were used to analyse the leaf traits and antioxidant defence for drought tolerance. When rice plants were exposed to different levels of drought stress by varying concentrations of polyethylene glycol （PEG） 6000, seed germination and growth parameters were significantly declined in all the rice landraces compared to the control. Drought stress also altered the leaf phenotypic traits based on chlorophyll fluorescence parameters and chlorophyll index, with more significant differences in susceptible variety IR64 than in traditional landraces. Furthermore, activities of antioxidative enzymes and proline and protein contents overtly increased under drought stress. The traditional rice landraces showed higher relative ratios for different parameters compared to the susceptible variety IR64. Taken together, the traditional landraces had superior leaf physiological efficiency compared to the susceptible and tolerant check varieties under drought stress.

关键词： antioxidant enzyme drought stress landrace phenotype rice leaf trait polyethylene glycol