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Saha SP, Ghosh S, Mazumdar D, Ghosh S, Ghosh D, Sarkar MM, Roy S. Valorization of banana peel into α-amylase using one factor at a time (OFAT) assisted artificial neural network (ANN) and its partial purification, characterization, and kinetics study. FOOD BIOSCI 2023. [DOI: 10.1016/j.fbio.2023.102533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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2
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Gavande PV, Basak A, Sen S, Lepcha K, Murmu N, Rai V, Mazumdar D, Saha SP, Das V, Ghosh S. Functional characterization of thermotolerant microbial consortium for lignocellulolytic enzymes with central role of Firmicutes in rice straw depolymerization. Sci Rep 2021; 11:3032. [PMID: 33542396 PMCID: PMC7862241 DOI: 10.1038/s41598-021-82163-x] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 01/07/2021] [Indexed: 01/30/2023] Open
Abstract
Rice (Oryza sativa L.) straw, an agricultural waste of high yield, is a sustainable source of fermentable sugars for biofuel and other chemicals. However, it shows recalcitrance to microbial catalysed depolymerization. We herein describe development of thermotolerant microbial consortium (RSV) from vermicompost with ability to degrade rice straw and analysis of its metagenome for bacterial diversity, and lignocellulolytic carbohydrate active enzymes (CAZymes) and their phylogenetic affiliations. RSV secretome exhibited cellulases and hemicellulases with higher activity at 60 °C. It catalysed depolymerization of chemical pretreated rice straw as revealed by scanning electron microscopy and saccharification yield of 460 mg g-1 rice straw. Microbial diversity of RSV was distinct from other compost habitats, with predominance of members of phyla Firmicutes, Proteobacteria and Bacteroidetes; and Pseudoclostridium, Thermoanaerobacterium, Chelatococcus and Algoriphagus being most abundant genera. RSV harboured 1389 CAZyme encoding ORFs of glycoside hydrolase, carbohydrate esterase, glycosyl transferase, carbohydrate binding module and auxiliary activity functions. Microorganisms of Firmicutes showed central role in lignocellulose deconstruction with importance in hemicellulose degradation; whereas representatives of Proteobacteria and Bacteroidetes contributed to cellulose and lignin degradation, respectively. RSV consortium could be a resource for mining thermotolerant cellulolytic bacteria or enzymes and studying their synergism in deconstruction of chemically pretreated rice straw.
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Affiliation(s)
- Parmeshwar V. Gavande
- grid.412222.50000 0001 1188 5260Department of Biotechnology, University of North Bengal, Raja Rammohunpur, P.O.-NBU, Siliguri, West Bengal 734013 India
| | - Arijita Basak
- grid.412222.50000 0001 1188 5260Department of Biotechnology, University of North Bengal, Raja Rammohunpur, P.O.-NBU, Siliguri, West Bengal 734013 India
| | - Subhajit Sen
- grid.412222.50000 0001 1188 5260Department of Biotechnology, University of North Bengal, Raja Rammohunpur, P.O.-NBU, Siliguri, West Bengal 734013 India
| | - Khusboo Lepcha
- grid.412222.50000 0001 1188 5260Department of Biotechnology, University of North Bengal, Raja Rammohunpur, P.O.-NBU, Siliguri, West Bengal 734013 India
| | - Nensina Murmu
- grid.412222.50000 0001 1188 5260Department of Biotechnology, University of North Bengal, Raja Rammohunpur, P.O.-NBU, Siliguri, West Bengal 734013 India
| | - Vijeta Rai
- grid.412222.50000 0001 1188 5260Department of Biotechnology, University of North Bengal, Raja Rammohunpur, P.O.-NBU, Siliguri, West Bengal 734013 India
| | - Deepika Mazumdar
- grid.412222.50000 0001 1188 5260Department of Biotechnology, University of North Bengal, Raja Rammohunpur, P.O.-NBU, Siliguri, West Bengal 734013 India
| | - Shyama Prasad Saha
- grid.412222.50000 0001 1188 5260Department of Biotechnology, University of North Bengal, Raja Rammohunpur, P.O.-NBU, Siliguri, West Bengal 734013 India
| | - Vaskar Das
- grid.412222.50000 0001 1188 5260Department of Biotechnology, University of North Bengal, Raja Rammohunpur, P.O.-NBU, Siliguri, West Bengal 734013 India
| | - Shilpi Ghosh
- grid.412222.50000 0001 1188 5260Department of Biotechnology, University of North Bengal, Raja Rammohunpur, P.O.-NBU, Siliguri, West Bengal 734013 India
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Singh KK, Saha S, Kadiravana RC, Mazumdar D, Rai V, Ghosh S. Ammonium metabolism in Selaginella bryopteris in response to dehydration-rehydration and characterisation of desiccation tolerant, thermostable, cytosolic glutamine synthetase from plant. Funct Plant Biol 2021; 48:257-267. [PMID: 33059817 DOI: 10.1071/fp20144] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 09/17/2020] [Indexed: 06/11/2023]
Abstract
Water deficit (WD) has adverse effects on plant growth, and acclimation requires responses allowing primary metabolism to continue. Resurrection plants can serve as model system to gain insight into metabolic regulation during WD. We herein report the response of a resurrection lycophyte, Selaginella bryopteris, to dehydration-rehydration cycle with emphasis on ammonium metabolism. Dehydration of S. bryopteris fronds resulted in decrease of total protein and increase of free ammonium levels and the effect was reversed on rehydration. The proline content increased twice after 24 h of dehydration, which again recovered to background levels comparable to that at full turgor state. The specific activity of glutamine synthetase (GS) didn't change significantly till 6 h and then declined by 21% after 24 h of dehydration, whereas specific activities of glutamate synthase (GOGAT) and aminating glutamate dehydrogenase (GDH) were enhanced significantly during dehydration. The deaminating activity of GDH also increased during dehydration albeit at a slower rate. Immunoblot analysis indicated overexpression of GS and GDH polypeptides during dehydration and their levels declined on rehydration. The results suggested significant role of GDH along with GS/GOGAT in production of nitrogen-rich amino acids for desiccation tolerance. Unlike higher plants S. bryopteris expressed GS only in cytosol. The enzyme had pH and temperature optima of 5.5 and 60°C, respectively, and it retained 96% activity on preincubation at 60°C for 30 min indicating thermostability. Hence, like higher plants the cytosolic GS from S. bryopteris has a conserved role in stress tolerance.
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Affiliation(s)
- Kamal K Singh
- Department of Biotechnology, University of North Bengal, Raja Rammohunpur, Siliguri-734013, India
| | - Shyamaprasad Saha
- Department of Microbiology, University of North Bengal, Raja Rammohunpur, Siliguri-734013, India
| | - Ram C Kadiravana
- Department of Biotechnology, University of North Bengal, Raja Rammohunpur, Siliguri-734013, India
| | - Deepika Mazumdar
- Department of Biotechnology, University of North Bengal, Raja Rammohunpur, Siliguri-734013, India
| | - Vijeta Rai
- Department of Biotechnology, University of North Bengal, Raja Rammohunpur, Siliguri-734013, India
| | - Shilpi Ghosh
- Department of Biotechnology, University of North Bengal, Raja Rammohunpur, Siliguri-734013, India; and Corresponding author. ;
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Singh KK, Saha S, Kadiravana RC, Mazumdar D, Rai V, Ghosh S. Corrigendum to: Ammonium metabolism in Selaginella bryopteris in response to dehydration-rehydration and characterisation of desiccation tolerant, thermostable, cytosolic glutamine synthetase from plant. Funct Plant Biol 2021; 48:358. [PMID: 33529572 DOI: 10.1071/fp20144_co] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Water deficit (WD) has adverse effects on plant growth, and acclimation requires responses allowing primary metabolism to continue. Resurrection plants can serve as model system to gain insight into metabolic regulation during WD. We herein report the response of a resurrection lycophyte, Selaginella bryopteris, to dehydration-rehydration cycle with emphasis on ammonium metabolism. Dehydration of S. bryopteris fronds resulted in decrease of total protein and increase of free ammonium levels and the effect was reversed on rehydration. The proline content increased twice after 24 h of dehydration, which again recovered to background levels comparable to that at full turgor state. The specific activity of glutamine synthetase (GS) didn't change significantly till 6 h and then declined by 21% after 24 h of dehydration, whereas specific activities of glutamate synthase (GOGAT) and aminating glutamate dehydrogenase (GDH) were enhanced significantly during dehydration. The deaminating activity of GDH also increased during dehydration albeit at a slower rate. Immunoblot analysis indicated overexpression of GS and GDH polypeptides during dehydration and their levels declined on rehydration. The results suggested significant role of GDH along with GS/GOGAT in production of nitrogen-rich amino acids for desiccation tolerance. Unlike higher plants S. bryopteris expressed GS only in cytosol. The enzyme had pH and temperature optima of 5.5 and 60°C, respectively, and it retained 96% activity on preincubation at 60°C for 30 min indicating thermostability. Hence, like higher plants the cytosolic GS from S. bryopteris has a conserved role in stress tolerance.
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Mazumdar D, Saha SP, Ghosh S. Isolation, screening and application of a potent PGPR for enhancing growth of Chickpea as affected by nitrogen level. ACTA ACUST UNITED AC 2019. [DOI: 10.1080/19315260.2019.1632401] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Deepika Mazumdar
- Department of Biotechnology, University of North Bengal, Siliguri, West Bengal, India
| | - Shyama Prasad Saha
- Department of Biotechnology, University of North Bengal, Siliguri, West Bengal, India
- Department of Microbiology, University of North Bengal, Siliguri, West Bengal, India
| | - Shilpi Ghosh
- Department of Biotechnology, University of North Bengal, Siliguri, West Bengal, India
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Yokosuk MO, Al-Wahish A, Artyukhin S, O'Neal KR, Mazumdar D, Chen P, Yang J, Oh YS, McGill SA, Haule K, Cheong SW, Vanderbilt D, Musfeldt JL. Magnetoelectric Coupling through the Spin Flop Transition in Ni_{3}TeO_{6}. Phys Rev Lett 2016; 117:147402. [PMID: 27740819 DOI: 10.1103/physrevlett.117.147402] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Indexed: 06/06/2023]
Abstract
We combined high field optical spectroscopy and first principles calculations to analyze the electronic structure of Ni_{3}TeO_{6} across the 53 K and 9 T magnetic transitions, both of which are accompanied by large changes in electric polarization. The color properties are sensitive to magnetic order due to field-induced changes in the crystal field environment, with those around Ni1 and Ni2 most affected. These findings advance the understanding of magnetoelectric coupling in materials in which magnetic 3d centers coexist with nonmagnetic heavy chalcogenide cations.
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Affiliation(s)
- M O Yokosuk
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - Amal Al-Wahish
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - Sergey Artyukhin
- Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
- Quantum Materials Theory, Italian Institute of Technology, Via Morego 30, 16163 Genova, Italy
| | - K R O'Neal
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - D Mazumdar
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - P Chen
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - Junjie Yang
- Laboratory for Pohang Emergent Materials and Max Plank POSTECH Center for Complex Phase Materials, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - Yoon Seok Oh
- Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
- Rutgers Center for Emergent Materials, Rutgers University, Piscataway, New Jersey 08854, USA
| | - Stephen A McGill
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA
| | - K Haule
- Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
| | - Sang-Wook Cheong
- Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
- Laboratory for Pohang Emergent Materials and Max Plank POSTECH Center for Complex Phase Materials, Pohang University of Science and Technology, Pohang 790-784, Korea
- Rutgers Center for Emergent Materials, Rutgers University, Piscataway, New Jersey 08854, USA
| | - David Vanderbilt
- Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
| | - J L Musfeldt
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
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Pal Roy M, Mazumdar D, Dutta S, Saha SP, Ghosh S. Cloning and Expression of Phytase appA Gene from Shigella sp. CD2 in Pichia pastoris and Comparison of Properties with Recombinant Enzyme Expressed in E. coli. PLoS One 2016; 11:e0145745. [PMID: 26808559 PMCID: PMC4726635 DOI: 10.1371/journal.pone.0145745] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Accepted: 12/08/2015] [Indexed: 11/18/2022] Open
Abstract
The phytase gene appAS was isolated from Shigella sp. CD2 genomic library. The 3.8 kb DNA fragment contained 1299 bp open reading frame encoding 432 amino acid protein (AppAS) with 22 amino acid signal peptide at N-terminal and three sites of N-glycosylation. AppAS contained the active site RHGXRXP and HDTN sequence motifs, which are conserved among histidine acid phosphatases. It showed maximum identity with phytase AppA of Escherichia coli and Citrobacter braakii. The appAS was expressed in Pichia pastoris and E. coli to produce recombinant phytase rAppAP and rAppAE, respectively. Purified glycosylated rAppAP and nonglycosylated rAppAE had specific activity of 967 and 2982 U mg-1, respectively. Both had pH optima of 5.5 and temperature optima of 60°C. Compared with rAppAE, rAppAP was 13 and 17% less active at pH 3.5 and 7.5 and 11 and 18% less active at temperature 37 and 50°C, respectively; however, it was more active at higher incubation temperatures. Thermotolerance of rAppAP was 33% greater at 60°C and 24% greater at 70°C, when compared with rAppAE. Both the recombinant enzymes showed high specificity to phytate and resistance to trypsin. To our knowledge, this is the first report on cloning and expression of phytase from Shigella sp.
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Affiliation(s)
- Moushree Pal Roy
- Department of Biotechnology, University of North Bengal, Siliguri, India
| | - Deepika Mazumdar
- Department of Biotechnology, University of North Bengal, Siliguri, India
| | - Subhabrata Dutta
- Department of Biotechnology, University of North Bengal, Siliguri, India
| | - Shyama Prasad Saha
- Department of Biotechnology, University of North Bengal, Siliguri, India
| | - Shilpi Ghosh
- Department of Biotechnology, University of North Bengal, Siliguri, India
- * E-mail:
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Das PK, Ghosh PR, Pradhan S, Roy B, Mazumdar D. Benefit cost analysis of Rhode Island Red chicken rearing in backyard on the basis of egg production performance. Vet World 2014. [DOI: 10.14202/vetworld.2014.605-609] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Denre M, Pal S, Mazumdar D, Chakravarty A, Bhattacharya A. Variation in Antioxidants and Antioxidant Activity in Garlic Cultivars. ACTA ACUST UNITED AC 2013. [DOI: 10.1080/19315260.2012.737895] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Klie RF, Qiao Q, Paulauskas T, Gulec A, Rebola A, Öğüt S, Prange MP, Idrobo JC, Pantelides ST, Kolesnik S, Dabrowski B, Ozdemir M, Boyraz C, Mazumdar D, Gupta A. Observations of Co4+ in a higher spin state and the increase in the Seebeck coefficient of thermoelectric Ca3Co4O9. Phys Rev Lett 2012; 108:196601. [PMID: 23003068 DOI: 10.1103/physrevlett.108.196601] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2011] [Indexed: 06/01/2023]
Abstract
Ca3Co4O9 has a unique structure that leads to exceptionally high thermoelectric transport. Here we report the achievement of a 27% increase in the room-temperature in-plane Seebeck coefficient of Ca3Co4O9 thin films. We combine aberration-corrected Z-contrast imaging, atomic-column resolved electron energy-loss spectroscopy, and density-functional calculations to show that the increase is caused by stacking faults with Co4+-ions in a higher spin state compared to that of bulk Ca3Co4O9. The higher Seebeck coefficient makes the Ca3Co4O9 system suitable for many high temperature waste-heat-recovery applications.
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Affiliation(s)
- R F Klie
- Department of Physics, University of Illinois at Chicago, Chicago, Illinois, USA
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Rahman R, Mazumdar D. Ab-initio adsorption study of chitosan on functionalized graphene: critical role of van der Waals interactions. J Nanosci Nanotechnol 2012; 12:2360-6. [PMID: 22755059 DOI: 10.1166/jnn.2012.5798] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We investigate the adsorption process of an organic biomolecule (chitosan) on epoxy-functionalized graphene using ab-initio density functional methods incorporating van-der-waals (vdW) interactions. The role of London dispersion force on the cohesive energy and conformal preference of the molecule is quantitatively elucidated. Functionalizing graphene with epoxy leads to weak hydrogen-bond interactions with chitosan. Binding energy values increase by over an order of magnitude after including vdW corrections, implying that dispersive interactions dominate the physisorption process. Conformal study show binding upto 30 kcal/mol when the molecule is oriented with the hydroxyl group approaching the functionalized graphene. Our study advances the promise of functionalized graphene for a variety of applications.
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Affiliation(s)
- R Rahman
- Department of Aerospace engineering and Mechanics, The University of Alabama, Tuscaloosa, AL 35487, USA
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Qiao Q, Gulec A, Paulauskas T, Kolesnik S, Dabrowski B, Ozdemir M, Boyraz C, Mazumdar D, Gupta A, Klie RF. Effect of substrate on the atomic structure and physical properties of thermoelectric Ca₃Co₄O₉ thin films. J Phys Condens Matter 2011; 23:305005. [PMID: 21719960 DOI: 10.1088/0953-8984/23/30/305005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The incommensurately layered cobalt oxide Ca(3)Co(4)O(9) exhibits an unusually high Seebeck coefficient as a polycrystalline bulk material, making it ideally suited for many high temperature thermoelectric applications. In this paper, we investigate properties of Ca(3)Co(4)O(9) thin films grown on cubic perovskite SrTiO(3), LaAlO(3), and (La(0.3)Sr(0.7))(Al(0.65)Ta(0.35))O(3) substrates and on hexagonal Al(2)O(3) (sapphire) substrates using the pulsed laser deposition technique. X-ray diffraction and transmission electron microscopy analysis indicate strain-free growth of films, irrespective of the substrate. However, depending on the lattice and symmetry mismatch, defect-free growth of the hexagonal CoO(2) layer is stabilized only after a critical thickness and, in general, we observe the formation of a stable Ca(2)CoO(3) buffer layer near the substrate-film interface. Beyond this critical thickness, a large concentration of CoO(2) stacking faults is observed, possibly due to weak interlayer interaction in this layered material. We propose that these stacking faults have a significant impact on the Seebeck coefficient and we report higher values in thinner Ca(3)Co(4)O(9) films due to additional phonon scattering sites, necessary for improved thermoelectric properties.
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Affiliation(s)
- Q Qiao
- Department of Physics, University of Illinois at Chicago, Chicago, IL, USA
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Bhattacharya A, Chattopadhyay A, Mazumdar D, Chakravarty A, Pal S. Antioxidant Constituents and Enzyme Activities in Chilli Peppers. ACTA ACUST UNITED AC 2010. [DOI: 10.1080/19315260903529709] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Maiti AK, Paul G, Maity B, Mazumdar D, Saha NC. Chromium III exposure inhibits brain Na+K+ATPase activity of Clarias batrachus L. involving lipid peroxidation and deficient mitochondrial electron transport chain activity. Bull Environ Contam Toxicol 2009; 83:479-483. [PMID: 19626263 DOI: 10.1007/s00128-009-9827-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2009] [Accepted: 07/08/2009] [Indexed: 05/28/2023]
Abstract
The present study elucidated the role of lipid peroxidation and diminished mitochondrial electron transport chain activity in partial dysfunction of brain Na+K+ATPase of Clarias batrachus exposed to chromium III ions. The fish were exposed to 10% and 20% of the derived 96 h LC50 value, 5.69 mg/L and 11.38 mg/L, respectively, and sampled on 20, 40 and 60 days. Exposure to chromium III on fish brain demonstrated an increased lipid peroxidation, production of protein carbonyl and reactive oxygen species and loss of protein thiol groups in synaptosomal fraction with decreased activity of Na+K+ATPase, partial inactivation of mitochondrial electron transport chain activity and energy depletion.
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Affiliation(s)
- A K Maiti
- Environmental Physiology Laboratory, Department of Physiology, University of Kalyani, Nadia, West Bengal 741235, India
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Bhattacharya A, Mazumdar D, Das AK, Hazra P, Pal S. Peroxidase and Polyphenoloxidase Activities and Phenol Content in Fruit of Eggplant and Their Relationship to Infestation by Shoot and Fruit Borer. ACTA ACUST UNITED AC 2009. [DOI: 10.1080/19315260903000495] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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16
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Bishnu A, Saha T, Mazumdar D, Chakrabarti K, Chakraborty A. Assessment of the impact of pesticide residues on microbiological and biochemical parameters of tea garden soils in India. J Environ Sci Health B 2008; 43:723-731. [PMID: 18941998 DOI: 10.1080/03601230802388850] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The main aim of this study was to assess the impact of pesticidal residues on soil microbial and biochemical parameters of the tea garden soils. The microbial biomass carbon (MBC), basal (BSR) and substrate induced respirations (SIR), beta-glucosidase activity and fluorescein diacetate hydrolyzing activity (FDHA) of six tea garden soils, along with two adjacent forest soils (control) in West Bengal, India were measured. The biomass and its activities and biochemical parameters were generally lower in the tea garden soils than the control soils. The MBC of the soils ranged from 295.5 to 767.5 micro g g(- 1). The BSR and SIR ranged from 1.65 to 3.08 mu g CO2-C g(- 1) soil h(- 1) and 3.08 to 10.76 micro g CO2-C g(- 1)h(- 1) respectively. The beta-glucosidase and FDHA of the soils varied from 33.3 and 76.3 micro g para-nitrophenol g(- 1) soil h(- 1) and 60.5 to 173.5 micro g fluorescein g(- 1)h(- 1)respectively. The tea garden soils contained variable residues of organophosphorus and organochlorine pesticides, which negatively affected the MBC, BSR, SIR, FDHA and beta -glucosidase activity. Ethion and chlorpyriphos pesticide residues in all the tea garden soils varied from 5.00 to 527.8 ppb and 17.6 to 478.1 ppb respectively. The alpha endosulfan, beta endosulfan and endosulfan sulfate pesticide residues in the tea garden soils ranged from 7.40 to 81.40 ppb, 8.50 to 256.1 ppb and 55 to 95.9 ppb respectively. Canonical correlation analysis shows that 93% of the total variation was associated with the negative impact of chlorpyriphos, beta and alpha endosulfan and endosulfan sulfate on MBC, BSR and FDHA. At the same time ethion had negative impact on SIR and beta-glucosidase. Data demonstrated that the pesticide residues had a strong impact on the microbial and biochemical components of soil quality.
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Affiliation(s)
- A Bishnu
- Institute of Environmental Studies and Wetland Management, Salt Lake City, Calcutta, India.
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Guchhait S, Bhattacharya A, Pal S, Mazumdar D, Chattopadhyay A, Das AK. Quality Evaluation of Cormels of New Germplasm of Taro. ACTA ACUST UNITED AC 2008. [DOI: 10.1080/19315260802212738] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Kurkure P, Arora B, Sarin R, Jalali R, Gupta T, Mazumdar D, Kane S, Menon H, Vora T, Parikh P. 2523 POSTER Concomitant chemo radiation (CRT) in high-risk primitive CNS embryonal tumours (PCET): a prospective pilot study at Tata Memorial Hospital (TMH). EJC Suppl 2007. [DOI: 10.1016/s1359-6349(07)70926-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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21
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Wang CK, Mazumdar D. An investigation into the irritation properties of some root filling materials. Endodontology 1998. [DOI: 10.4103/0970-7212.347440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Abstract
A 17-year-old boy presented with a slowly growing right frontal bone swelling over an 8-year period. The swelling resulted in marked proptosis and reduced his visual acuity and eye movements. He was found to have clotting factor VIII deficiency. A chronic intradiploic haematoma as the cause of the swelling was a surprise finding.
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Affiliation(s)
- A Goel
- Department of Neurosurgery, K.E.M. Hospital, Parel, Bombay, India
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Mazumdar D, Mehta DS, Singh BP, Srivastava AB, Pal D. Microbiological evaluation of non-vital teeth. J Indian Dent Assoc 1983; 55:149-52. [PMID: 6582136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Kanekar S, Mazumdar D, Bulsara RM, Kolsawalla MB. Perception of an aggressor and his victim as a function of their relationship and retaliation. Psychol Rep 1979; 44:609-10. [PMID: 461654 DOI: 10.2466/pr0.1979.44.2.609] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Two experiments, using a simple incident of aggression described in a passage, were conducted to study the evaluation of an aggressor (Study II) and his victim (Study I) as a function of their relationship. Both studies used a 2 (subjects' sex) × 2 (aggressor superior to victim vs aggressor subordinate to victim) × 2 (retaliating vs nonretaliating victim) factorial design, with 20 college students per cell as subjects ( N = 320). The nonretaliating victim was rated more positively than the retaliating victim on all dimensions. The aggressor tended to be more favorably judged when the victim was a superior rather than a subordinate, although this was not true of all conditions or of all dimensions.
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