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Majhi S, Bhattacharyya S, Gopmandal PP. Effect of the Surface Charge-Dependent Boundary Slip on the Electrophoresis of a Hydrophobic Polarizable Rigid Colloid. Langmuir 2024. [PMID: 38324781 DOI: 10.1021/acs.langmuir.3c03436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
The electrophoresis of a hydrophobic charged rigid colloid is studied by considering the lateral movement of the adsorbed surface charge. The slip velocity condition at the hydrophobic surface is modified to take into account the impact of the frictional and electric forces created by the adsorbed laterally mobile surface charge. Though the dependency of the surface charge on the slip velocity in the context of electrophoresis has been addressed before, the effect of the laterally mobile adsorbed surface charge on the electrophoresis of hydrophobic colloids has not been studied. The dielectric colloid is considered to polarize and create an induced immobile surface charge when subjected to an imposed electric field. The impact of the mobile surface charge along with the immobile induced surface charge on electrophoresis of a hydrophobic colloid is elucidated by numerically solving the governing electrokinetic equations in their full form. We have also developed a simplified model under a weak applied field consideration, which can be further reduced to a closed-form analytic expression for the mobility under the Debye-Hückel approximation. This analytic model for mobility is in excellent agreement with the exact numerical solution for an entire range of the Debye length when the ζ-potential is in the order of the thermal potential. One of the notable features of this closed-form mobility expression is that it accounts for the mobile adsorbed surface charge on the hydrodynamic slip condition and the dielectric polarization of the particle. We find that the mobility of the surface charge decreases the electrophoretic mobility of the hydrophobic dielectric colloid. However, the mobile surface charge enhances the mobility of a conducting hydrophobic colloid.
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Affiliation(s)
- Subrata Majhi
- Department of Mathematics, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Somnath Bhattacharyya
- Department of Mathematics, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Partha P Gopmandal
- Department of Mathematics, National Institute of Technology Durgapur, Durgapur 713209, India
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2
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Laha A, Sengupta S, Bhattacharyya S, Bhattacharyya K, GuhaRoy S. Isolation and characterization of rhizobacteria from lentil for arsenic resistance and plant growth promotion. 3 Biotech 2024; 14:30. [PMID: 38178896 PMCID: PMC10761649 DOI: 10.1007/s13205-023-03873-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 12/03/2023] [Indexed: 01/06/2024] Open
Abstract
Low-cost microbial remediation strategies serve as a viable and potent weapon for curbing the arsenic menace. In the present study, two arsenic-resistant bacteria were isolated from the contaminated lentil rhizosphere in Gangetic plain of eastern India. LAR-21 (Burkholderia cepacia, MW356875) and LAR-25 (Burkholderia cenocepacia, MW356894) could remove 87.6% and 85.9% of arsenite (10 mM) from the liquid culture medium in laboratory condition. They were highly resistant to arsenate and arsenite and also had a high arsenite oxidase activity. LAR-21 showed the highest level of minimum inhibitory concentration value of 390 mM for arsenate and 31 mM for arsenite. The same strain was found to show highest arsenite oxidase activity, i.e., 5.2 nM min-1 mg-1of protein. These two strains further possess potential plant growth-promoting characteristics like indole acetic acid production (5-15 mM IAA mL-1), 1-aminocyclopropane-1-carboxylate deaminase (8-21 nM α-keto butyrate mg protein-1 h-1), nitrogenase activity (3-8.99 nM ethylene mg cell protein-1 h-1), siderophore production (17-22.1 µM deferoxamine mesylate mL-1), phosphate solubilization (261-453 µg mL-1) under arsenic stress condition. The plant growth promotion of the strains was further validated by pot study of lentil by assessing their agronomic and growth-related traits, and potential to recover from arsenic stress (17.2-21.2% arsenic reduction in root and shoot, 16-19.2% in leaf and pod, and 15-23% reduction in seeds). The LAR-21 strain, thus, emerged as the most suited candidate for bioremediation and plant (lentil) growth promotion in arsenic polluted environment.
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Affiliation(s)
- Aritri Laha
- Department of Microbiology, School of Life Sciences, Swami Vivekananda University, Barrackpore, Kolkata, West Bengal 700121 India
- Department of Genetics and Plant Breeding, Faculty of Agriculture, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal 741252 India
| | - Sudip Sengupta
- Department of Agricultural Chemistry and Soil Science, Faculty of Agriculture, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal 741252 India
- School of Agriculture, Swami Vivekananda University, Barrackpore, Kolkata, West Bengal 700121 India
| | - Somnath Bhattacharyya
- Department of Genetics and Plant Breeding, Faculty of Agriculture, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal 741252 India
| | - Kallol Bhattacharyya
- Department of Agricultural Chemistry and Soil Science, Faculty of Agriculture, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal 741252 India
| | - Sanjoy GuhaRoy
- Department of Botany, West Bengal State University, Barasat, Kolkata, West Bengal 700126 India
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Gupta A, Shareef M, Twisha M, Bhattacharjee S, Mukherjee G, Nayak SS, Basu S, Dasgupta S, Datta J, Bhattacharyya S, Mukherjee A. True coincidence summing correction for a BEGe detector in close geometry measurements. Appl Radiat Isot 2023; 200:110966. [PMID: 37566947 DOI: 10.1016/j.apradiso.2023.110966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 07/06/2023] [Accepted: 07/27/2023] [Indexed: 08/13/2023]
Abstract
The true coincidence summing correction factor for a Broad Energy Germanium detector has been calculated at far and close geometry set-up using radioactive γ-ray sources. The correction factors were calculated using both experimental and analytical methods. Geant4 simulation was done to calculate the full-energy peak and total efficiencies of the detector. Standard, as well as fabricated mono-energetic γ-ray sources, were used for the γ-ray efficiency measurements. The simulated efficiencies of mono-energetic γ-ray sources were matched to the experimental γ-ray efficiencies by optimizing the detector parameters. The same parameters were used to obtain the full-energy peak and total efficiencies for γ-rays of current interest. Analytical and experimental correction factors were found to agree well with each other. The coincidence summing effect is found to be significant for source-to-detector distances less than 5 cm.
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Affiliation(s)
- Ashish Gupta
- Saha Institute of Nuclear Physics, 1/AF, Bidhan Nagar, Kolkata, 700064, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India
| | - M Shareef
- Saha Institute of Nuclear Physics, 1/AF, Bidhan Nagar, Kolkata, 700064, India
| | - Munmun Twisha
- Saha Institute of Nuclear Physics, 1/AF, Bidhan Nagar, Kolkata, 700064, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India
| | - Saikat Bhattacharjee
- Saha Institute of Nuclear Physics, 1/AF, Bidhan Nagar, Kolkata, 700064, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India
| | - Gopal Mukherjee
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata, 700064, India
| | - Satya Samiran Nayak
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata, 700064, India
| | - Sansaptak Basu
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata, 700064, India
| | - S Dasgupta
- Analytical Chemistry Division, Bhabha Atomic Research Centre, Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata, 700064, India
| | - J Datta
- Analytical Chemistry Division, Bhabha Atomic Research Centre, Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata, 700064, India
| | - S Bhattacharyya
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata, 700064, India
| | - A Mukherjee
- Saha Institute of Nuclear Physics, 1/AF, Bidhan Nagar, Kolkata, 700064, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India.
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Sodisetti VR, Lemmerer A, Wamwangi D, Bhattacharyya S. Observation of High Magnetic Bistability in Lanthanide (Ln = Gd, Tb and Dy)-Grafted Carbon Nanotube Hybrid Molecular System. Int J Mol Sci 2023; 24:12303. [PMID: 37569684 PMCID: PMC10418393 DOI: 10.3390/ijms241512303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 07/26/2023] [Accepted: 07/27/2023] [Indexed: 08/13/2023] Open
Abstract
There is an immense research interest in molecular hybrid materials posing novel magnetic properties for usage in spintronic devices and quantum technological applications. Although grafting magnetic molecules onto carbon nanotubes (CNTs) is nontrivial, there is a need to explore their single molecule magnetic (SMM) properties post-grafting to a greater degree. Here, we report a one-step chemical approach for lanthanide-EDTA (Ln = GdIII, 1; TbIII, 2 and DyIII, 3) chelate synthesis and their effective grafting onto MWCNT surfaces with high magnetic bistability retention. The magnetic anisotropy of an Ln-CNT hybrid molecular system by replacing the central ions in the hybrid complex was studied and it was found that system 1 exhibited a magnetization reversal from positive to negative values at 70 K with quasi-anti-ferromagnetic ordering, 2 showed diamagnetism to quasi-ferromagnetism and 3 displayed anti-ferromagnetic ordering as the temperature was lowered at an applied field of 200 Oe. A further analysis of magnetization (M) vs. field (H) revealed 1 displaying superparamagnetic behavior, and 2 and 3 displaying smooth hysteresis loops with zero-field slow magnetic relaxation. The present work highlights the importance of the selection of lanthanide ions in designing SMM-CNT hybrid molecular systems with multi-functionalities for building spin valves, molecular transistors, switches, etc.
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Affiliation(s)
- Venkateswara Rao Sodisetti
- Nano-Scale Transport Physics Laboratory, School of Physics, University of the Witwatersrand (Wits), Johannesburg 2050, South Africa;
| | - Andreas Lemmerer
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand (Wits), Johannesburg 2050, South Africa;
| | - Daniel Wamwangi
- DSI-NRF Centre of Excellence in Strong Materials and School of Physics, University of the Witwatersrand (Wits), Johannesburg 2050, South Africa;
| | - Somnath Bhattacharyya
- Nano-Scale Transport Physics Laboratory, School of Physics, University of the Witwatersrand (Wits), Johannesburg 2050, South Africa;
- DSI-NRF Centre of Excellence in Strong Materials and School of Physics, University of the Witwatersrand (Wits), Johannesburg 2050, South Africa;
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Majhi S, Bhattacharyya S. Diffusiophoresis of a Charged Droplet in Asymmetric as Well as Mixed Electrolytes through Numerical and Semianalytic Models. Langmuir 2023. [PMID: 37223877 DOI: 10.1021/acs.langmuir.3c00697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A numerical study on the diffusiophoresis of a droplet in an electrolyte medium is carried out by solving the full set of coupled governing equations, which are based on the conservation principle. Diffusiophoresis is considered for monovalent as well as non-z:z electrolytes and mixed electrolytes. The numerical model is supplemented with a semianalytic simplified model based on first-order perturbation analysis, which agrees with the numerical model for a low to moderate range of surface potential. The mobility for a low-viscosity fluid at a thinner Debye length is dominated by the chemiphoresis part, which creates the mobility to become an even function of the surface charge density for a monovalent electrolyte. Such a pattern in mobility does not appear in a non-z:z asymmetric electrolyte. At a thinner Debye length, diffusiophoresis becomes independent of the diffusion field, hence the mobility is independent of the composition of electrolytes in a mixed monovalent electrolyte solution. Our results show that the size-based sorting of droplets is efficient when a mixed electrolyte is considered. We have also addressed the finite ion size effects by considering a modified ion transport equation. One of the key features of the present study is the simplified semianalytical model for the diffusiophoresis of a droplet in a z:z electrolyte as well as in non-z:z and mixed electrolytes, which is shown to be valid up to a moderate range of surface potential for a finite Debye length.
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Affiliation(s)
- Subrata Majhi
- Department of Mathematics, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Somnath Bhattacharyya
- Department of Mathematics, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
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Roy C, Mondal S, Banerjee P, Bhattacharyya S. Low temperature atmospheric synthesis of WAlB and Mn2AlB2 MAB phases by modified molten salt shielded synthesis method. ADV POWDER TECHNOL 2023. [DOI: 10.1016/j.apt.2023.103983] [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: 02/24/2023]
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Saha S, Purkayastha S, K N, Ganguly S, Das S, Ganguly S, Sinha Mahapatra N, Bhattacharya K, Das D, Saha AK, Biswas T, Bhattacharyya PK, Bhattacharyya S. Rice ( Oryza sativa) alleviates photosynthesis and yield loss by limiting specific leaf weight under low light intensity. Funct Plant Biol 2023; 50:267-276. [PMID: 36624487 DOI: 10.1071/fp22241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 12/11/2022] [Indexed: 06/17/2023]
Abstract
The physiological mechanisms of shade tolerance and trait plasticity variations under shade remain poorly understood in rice (Oryza sativa L.). Twenty-five genotypes of rice were evaluated under open and shade conditions. Various parameters to identify variations in the plasticity of these traits in growth irradiance were measured. We found wide variations in specific leaf weight (SLW) and net assimilation rate measured at 400µmolm-2 s-1 photosynthetic photon flux density (PPFD; referred to as A 400 ) among the genotypes. Under shade, tolerant genotypes maintained a high rate of net photosynthesis by limiting specific leaf weight accompanied by increased intercellular CO2 concentration (C i ) compared with open-grown plants. On average, net photosynthesis was enhanced by 20% under shade, with a range of 2-30%. Increased accumulation of biomass under shade was observed, but it showed no correlation with photosynthetic plasticity. Chlorophyll a /b ratio also showed no association with photosynthetic rate and yield. Analysis of variance showed that 11%, 16%, and 37% of the total variance of A 400 , SLW, and C i were explained due to differences in growth irradiance. SLW and A 400 plasticity in growth irradiance was associated with yield loss alleviation with R 2 values of 0.37 and 0.16, respectively. Biomass accumulation was associated with yield loss alleviation under shade, but no correlation was observed between A 400 and leaf-N concentration. Thus, limiting specific leaf weight accompanied by increased C i rather than leaf nitrogen concentration might have allowed rice genotypes to maintain a high net photosynthesis rate per unit leaf area and high yield under shade.
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Affiliation(s)
- Shoumik Saha
- Department of Genetics and Plant Breeding, Crop Research Unit, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, PIN 741252, West Bengal, India
| | - Shampa Purkayastha
- Department of Genetics and Plant Breeding, Crop Research Unit, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, PIN 741252, West Bengal, India
| | - Nimitha K
- Department of Genetics and Plant Breeding, Crop Research Unit, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, PIN 741252, West Bengal, India
| | - Sebantee Ganguly
- Department of Genetics and Plant Breeding, Crop Research Unit, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, PIN 741252, West Bengal, India
| | - Subhadeep Das
- Department of Genetics and Plant Breeding, Crop Research Unit, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, PIN 741252, West Bengal, India
| | - Shamba Ganguly
- Department of Genetics and Plant Breeding, Crop Research Unit, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, PIN 741252, West Bengal, India
| | - Nilanjan Sinha Mahapatra
- Department of Genetics and Plant Breeding, Crop Research Unit, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, PIN 741252, West Bengal, India
| | - Kriti Bhattacharya
- Department of Genetics and Plant Breeding, Crop Research Unit, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, PIN 741252, West Bengal, India
| | - Dibakar Das
- Department of Genetics and Plant Breeding, Crop Research Unit, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, PIN 741252, West Bengal, India
| | - Arup K Saha
- Department of Genetics and Plant Breeding, Crop Research Unit, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, PIN 741252, West Bengal, India
| | - Tirthankar Biswas
- Department of Genetics and Plant Breeding, Crop Research Unit, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, PIN 741252, West Bengal, India
| | - Prabir K Bhattacharyya
- Department of Genetics and Plant Breeding, Crop Research Unit, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, PIN 741252, West Bengal, India
| | - Somnath Bhattacharyya
- Department of Genetics and Plant Breeding, Crop Research Unit, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, PIN 741252, West Bengal, India
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Mahanta M, Gantait S, Sarkar S, Sadhukhan R, Bhattacharyya S. Colchicine-mediated in vitro polyploidization in gerbera hybrid. 3 Biotech 2023; 13:74. [PMID: 36748015 PMCID: PMC9898485 DOI: 10.1007/s13205-022-03457-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 12/30/2022] [Indexed: 02/05/2023] Open
Abstract
An efficient in vitro protocol for high-frequency polyploidization for the first time in gerbera hybrid (BGC-2019-01) was developed in the present study. Two-week-old in vitro-developed shoots (tips) were treated individually with 0.1%, 0.25% and 0.5% (w/v) colchicine solutions for 4, 6, 8, and 12 h. The colchicine-treated shoot tips were then inoculated on Murashige and Skoog (MS) medium fortified with 1.5 mg/l meta-Topolin for multiple shoot proliferation and later transferred into 1.5 mg/l indole-3-acetic acid-fortified MS medium for rooting of shoots. The ploidy levels of the colchicine-treated and regenerated plantlets along with the non-treated ones were confirmed via flow cytometry analysis and metaphasic chromosome count. The highest frequency of tetraploid plantlets (50%) were obtained when shoot tips were treated with 0.1% colchicine for 4 h. Morphological observations revealed that induced tetraploid plantlets exhibited delayed fresh shoot initiation, fewer but longer shoots, as well as fewer but broader leaves. Likewise, the study of stomata revealed that in comparison to their diploid counterparts, the tetraploid plantlets exhibited less frequent yet significantly larger stomata, and higher number of chloroplasts. The tetraploids were recorded with significantly higher chlorophyll, carotenoid, and anthocyanin content during the photosynthetic pigment analyses. During ex vitro acclimatization and field growth, the tetraploid plants exhibited delayed proliferation but with higher vigor and thickened broad leaves. The genetic uniformity among the diploid and the tetraploid plants was confirmed using conserved DNA-derived polymorphism (CDDP), directed amplification of minisatellite-region DNA (DAMD), inter simple sequence repeats (ISSR), and start codon targeted (SCoT) polymorphism marker systems. The tetraploids developed in the present study would be of immense importance for the genetic improvement of gerbera as far as its ornamental values are concerned.
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Affiliation(s)
- Manisha Mahanta
- Crop Research Unit (Genetics and Plant Breeding), Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal 741252 India
| | - Saikat Gantait
- Crop Research Unit (Genetics and Plant Breeding), Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal 741252 India
| | - Sutanu Sarkar
- Crop Research Unit (Genetics and Plant Breeding), Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal 741252 India
| | - Raghunath Sadhukhan
- All India Coordinated Research Project on Floriculture, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal 741252 India
| | - Somnath Bhattacharyya
- Crop Research Unit (Genetics and Plant Breeding), Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal 741252 India
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Roy A, Reddy MH, Sarkar M, Sagolsem D, Murmu SK, Das C, Roy D, Ganguly S, Nath R, Bhattacharyya PK, Sarker A, Bhattacharyya S. A mis-splicing early flowering 3 (elf3) allele of lentil is associated with yield enhancement under terminal heat stress. J Appl Genet 2023; 64:265-273. [PMID: 36821070 DOI: 10.1007/s13353-023-00753-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Revised: 01/28/2023] [Accepted: 02/13/2023] [Indexed: 02/24/2023]
Abstract
There is a vast scope of area expansion of lentils after harvesting wet rice in South Asia. However, due to the photoperiod effect and terminal heat, the existing short-duration varieties failed to minimize yield loss under late-sown conditions. A mis-splicing causing A/G SNP present in the last nucleotide of exon 3 of early flowering 3 (ELF3) gene (elf3 allele) in a lentil line, L4710, is associated with the photoperiod insensitive flowering and the fast absolute growth rate (AGR). None of the Indian cultivars tested in this study, either early or late, possesses the non-functional elf3 allele. However, the A to G transition in ELF3-exon2 replaces glycine with aspartic acid at the 403rd amino acid in all the Indian varieties tested, compared to the reference sequence of Mediterranean accession, ILL5588. Therefore, targeting A/G SNP of exon 3, a PCR-based codominant marker is developed. The elf3 allele is correlated with the fast AGR and early flowering, but low yield and biomass, in an L4710 × LL56-derived RIL-population, compared to ELF3 carrying alleles when sown on 15th November. However, in a month of delayed sowing (20th December), the same elf3-RILs revealed a higher yield and biomass with slower AGR Moreover, three elf3-carrying lines, grown in delayed condition (20 December) for two consecutive years in three locations, outyielded three popular high-yielding cultivars that carry functional ELF3. Thus, elf3-carrying high-yielding lines could be the breeder's choice to expand and enhance lentil yield in short-season environments and in vast rice fallows of south Asia, where delayed rice harvest occurs frequently.
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Affiliation(s)
- Anirban Roy
- Crop Research Unit, Genetics and Plant Breeding, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, India
| | - M Hemakumar Reddy
- Crop Research Unit, Genetics and Plant Breeding, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, India
| | - Moutushi Sarkar
- Crop Research Unit, Genetics and Plant Breeding, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, India
| | - Diana Sagolsem
- Crop Research Unit, Genetics and Plant Breeding, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, India
| | - Sumit K Murmu
- Crop Research Unit, Genetics and Plant Breeding, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, India
| | - Camellia Das
- Crop Research Unit, Genetics and Plant Breeding, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, India
| | - Debarati Roy
- Crop Research Unit, Genetics and Plant Breeding, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, India
| | - Shamba Ganguly
- Crop Research Unit, Genetics and Plant Breeding, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, India
| | - Rajib Nath
- Department of Agronomy, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, India
| | - Prabir K Bhattacharyya
- Crop Research Unit, Genetics and Plant Breeding, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, India
| | - Asutosh Sarker
- ICARDA, South Asia-China Regional Office, New Delhi, 110012, India
| | - Somnath Bhattacharyya
- Crop Research Unit, Genetics and Plant Breeding, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, India.
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Bhaskar B, Bhattacharyya S. Numerical study supplemented with simplified model on electrophoresis of a hydrophobic colloid incorporating finite ion size effects and ion-solvent interactions. Electrophoresis 2023; 44:403-416. [PMID: 36377510 DOI: 10.1002/elps.202200232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Revised: 11/02/2022] [Accepted: 11/06/2022] [Indexed: 11/16/2022]
Abstract
We consider a modified electrokinetic model to study the electrophoresis of a hydrophobic particle by considering the finite sized ions. The mathematical model adopted in this study incorporates the ion steric repulsion, ion-solvent interactions as well as Maxwell stress on the electrolyte. The dielectric permittivity and viscosity of the electrolyte is considered to vary with the local ionic volume fraction. Based on this modified model for the electrokinetics we have analyzed the electrophoresis in a single as well as mixture of electrolytes of monovalent and non- z : z $z:z$ electrolytes. The dependence of viscosity on local ionic volume fraction modifies the hydrodynamic drag as well as diffusivity of ions, which are ignored in existing studies on electrophoresis. A simplified model for electrophoresis of a hydrophobic particle incorporating the ion steric repulsion and ion-solvent interactions is developed based on the first-order perturbation on applied electric field. This simplified model is established to be efficient for a Debye layer thinner than the particle size and a smaller range of slip length. This model can be implemented for any number of ionic species as well as non- z : z $z:z$ electrolytes. It is established that the ion steric interactions and dielectric decrement creates a counterion saturation in the Debye layer leading to an enhanced mobility compared to the standard model. However, experimental data for non-dilute cases often under predicts the theoretically determined mobility. The present modified model fills this lacuna and demonstrate that the consideration of finite ion size modifies the medium viscosity and hence, ionic mobility, which in combination lowers the mobility value.
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Affiliation(s)
- Babu Bhaskar
- Department of Mathematics, Indian Institute of Technology Kharagpur, Kharagpur, India
| | - Somnath Bhattacharyya
- Department of Mathematics, Indian Institute of Technology Kharagpur, Kharagpur, India
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Roy A, Sahu PK, Das C, Bhattacharyya S, Raina A, Mondal S. Conventional and new-breeding technologies for improving disease resistance in lentil ( Lens culinaris Medik). Front Plant Sci 2023; 13:1001682. [PMID: 36743558 PMCID: PMC9896981 DOI: 10.3389/fpls.2022.1001682] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Accepted: 12/02/2022] [Indexed: 06/02/2023]
Abstract
Lentil, an important cool season food legume, is a rich source of easily digestible protein, folic acid, bio-available iron, and zinc nutrients. Lentil grows mainly as a sole crop in the winter after harvesting rice in South Asia. However, the annual productivity is low due to its slow growth during the early phase, competitive weed infestation, and disease outbreaks during the crop growth period. Disease resistance breeding has been practiced for a long time to enhance resistance to various diseases. Often the sources of resistance are available in wild crop relatives. Thus, wide hybridization and the ovule rescue technique have helped to introgress the resistance trait into cultivated lentils. Besides hybridization, induced mutagenesis contributed immensely in creating variability for disease tolerance, and several disease-resistant mutant lines have been developed. However, to overcome the limitations of traditional breeding approaches, advancement in molecular marker technologies, and genomics has helped to develop disease-resistant and climate-resilient lentil varieties with more precision and efficiency. This review describes types of diseases, disease screening methods, the role of conventional and new breeding technologies in alleviating disease-incurred damage and progress toward making lentil varieties more resilient to disease outbreaks under the shadow of climate change.
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Affiliation(s)
- Anirban Roy
- Department of Genetics and Plant Breeding, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur West Bengal, India
- Department of Genetics and Plant Breeding, Ramakrishna Mission Vivekananda Educational & Research Institute (RKMVERI), Ramkrishna Mission Ashrama, Kolkata, India
| | - Parmeshwar K. Sahu
- Department of Genetics and Plant Breeding, College of Agriculture, Indira Gandhi Krishi Viswavidyalaya, Raipur, Chhattisgarh, India
| | - Camellia Das
- Department of Genetics and Plant Breeding, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur West Bengal, India
| | - Somnath Bhattacharyya
- Department of Genetics and Plant Breeding, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur West Bengal, India
| | - Aamir Raina
- Mutation Breeding Laboratory, Department of Botany, Aligarh Muslim University, Aligarh, Uttar Pradesh, India
- Botany Section, Women’s College, Aligarh Muslim University, Aligarh, Uttar Pradesh, India
| | - Suvendu Mondal
- Nuclear Agriculture and Biotechnology Division, Bhabha Atomic Research Centre, Mumbai, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai, India
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Pisani S, Gunasekera B, Velayudhan L, Bhattacharyya S. 1218 GREY MATTER VOLUME AND NEUROTRANSMITTER RECEPTORS ABNORMALITIES IN PARKINSON’S DISEASE PSYCHOSIS: A META-ANALYSIS. Age Ageing 2023. [DOI: 10.1093/ageing/afac322.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Abstract
Introduction
Recent evidence suggests extensive grey matter abnormalities in Parkinson’s Disease Psychosis (PDP), as well as dysfunction of dopaminergic and serotonergic receptors. However, findings remain unclear. This meta-analysis aimed to identify neuroanatomical correlates of PDP and to examine the relationship between grey matter and key candidate receptors.
Method
Peak coordinates were extracted from structural magnetic resonance imaging (MRI) studies (identified through systematic searches on PubMed, Web of Science, and Embase) for PDP patients and Parkinson's Disease patients without psychosis (PDnP) and were analysed using Seed-based d mapping with permutation of subject images (SDM-PSI). Gene expression data for dopaminergic (D1/D2) and serotonergic (5-HT2a/5-HT1a) receptors were extracted from the Allen Human Brain Atlas, probe-to-gene re-annotation data were downloaded from Arnatkevic̆iūtė et al. (Neuroimage, 2019;189:353-67) and parcellated on 78 regions of the Desikan-Killiany brain atlas. Effect-size estimates, extracted from the SDM-PSI analysis for these 78 regions as a measure of grey matter in PDP patients, were entered in multiple regression models.
Results
10 studies were included in the meta-analysis (PDP, n= 211; mean age = 69.01 years, 52.1% males; PDnP, n = 298, mean age = 67.34 years, 41.9 % males). Reduction in grey matter was observed in parieto-temporo-occipital regions in PDP patients (uncorrected, p < 0.05). When controlling for PD medications, expressed in Levodopa equivalent daily dose (LEDD), results remained significant (uncorrected, p < 0.05). 5-HT2a and 5-HT1a gene receptor expressions were associated with estimates of grey matter volume (5-HT2a, b=-0.20, p=0.01, adjusted for LEDD, b=-0.18, p=0.03; 5-HT1a, b=0.11, p=0.02, adjusted for LEDD, b=0.12, p=0.01).
Conclusion
We observed lower cortical volume in parieto-temporo-occipital areas, which are involved in information processing, integration, and attention in PDP compared to PDnP patients. We also reported an association between regional brain expression of serotonergic receptors and grey matter volume suggesting a role of serotonin in PDP.
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Affiliation(s)
- S Pisani
- King's College London Department of Psychosis Studies,
| | - B Gunasekera
- King's College London Department of Psychosis Studies,
| | - L Velayudhan
- King's College London Department of Old Age Psychiatry,
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Roy A, Datta SP, Barman M, Golui D, Bhattacharyya S, Meena MC, Chinnusamy V, Pushkar S, Pandey PS, Rahman MM. Co-Application of Silicate and Low-Arsenic-Accumulating Rice Cultivars Efficiently Reduces Human Exposure to Arsenic-A Case Study from West Bengal, India. Toxics 2023; 11:64. [PMID: 36668790 PMCID: PMC9865337 DOI: 10.3390/toxics11010064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 11/21/2022] [Accepted: 01/05/2023] [Indexed: 06/17/2023]
Abstract
We investigated the effect of practically realizable doses of silicate on arsenic (As) uptake by differential-As-accumulating rice cultivars grown on geogenically As-polluted soil. The possible health risk from the dietary ingestion of As through rice was also assessed. In addition, a solution culture experiment was conducted to examine the role of root-secreted weak acids in differential As acquisition by rice cultivars. When grown without silicate, Badshabhog accumulated a much smaller amount of As in grain (0.11 mg kg-1) when compared to the other three varieties. Satabdi, IR-36, and Khitish accumulated As in grain beyond the permissible limit (0.2 mg kg-1) for human consumption. The application of silicate effectively reduced the As content in the grain, husk, and straw of all of the cultivars. The grain As content fell to 17.2 and 27.6% with the addition of sodium metasilicate at the rates of 250 and 500 mg kg-1, respectively. In the case of Khitish, the grain As content was brought down within permissible limits by the applied silicate (500 mg kg-1). The integrated use of low-As-accumulating cultivars and silicate has great potential to reduce the public health risks associated with As. A positive correlation between root-secreted total weak acid and grain As content could explain the different rice cultivars' differential As acquisition capacity.
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Affiliation(s)
- Arkaprava Roy
- Division of Soil Science and Agricultural Chemistry, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India
| | - Siba Prasad Datta
- Division of Soil Science and Agricultural Chemistry, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India
| | - Mandira Barman
- Division of Soil Science and Agricultural Chemistry, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India
| | - Debasis Golui
- Division of Soil Science and Agricultural Chemistry, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India
- Department of Civil, Construction and Environmental Engineering, North Dakota State University, Fargo, ND 58102, USA
| | | | - Mahesh Chand Meena
- Division of Soil Science and Agricultural Chemistry, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India
| | - Viswanathan Chinnusamy
- Division of Plant Physiology, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India
| | - Suchitra Pushkar
- Division of Plant Physiology, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India
| | - Punyavrat S. Pandey
- Education Division, Indian Council of Agricultural Research, New Delhi 110012, India
| | - Mohammad Mahmudur Rahman
- Global Centre for Environmental Remediation (GCER), College of Engineering, Science and Environment, The University of Newcastle, Callaghan, NSW 2308, Australia
- Department of General Educational Development, Faculty of Science & Information Technology, Daffodil International University, Ashulia, Savar, Dhaka 1207, Bangladesh
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Yadav KK, Chouhan N, Thubstan R, Norlha S, Hariharan J, Borwankar C, Chandra P, Dhar VK, Mankuzhyil N, Godambe S, Sharma M, Venugopal K, Singh KK, Bhatt N, Bhattacharyya S, Chanchalani K, Das MP, Ghosal B, Godiyal S, Khurana M, Kotwal SV, Koul MK, Kumar N, Kushwaha CP, Nand K, Pathania A, Sahayanathan S, Sarkar D, Tolamati A, Koul R, Rannot RC, Tickoo AK, Chitnis VR, Behere A, Padmini S, Manna A, Joy S, Nair PM, Jha KP, Moitra S, Neema S, Srivastava S, Punna M, Mohanan S, Sikder SS, Jain A, Banerjee S, . K, Deshpande J, Sanadhya V, Andrew G, Patil MB, Goyal VK, Gupta N, Balakrishna H, Agrawal A, Srivastava SP, Karn KN, Hadgali PI, Bhatt S, Mishra VK, Biswas PK, Gupta RK, Kumar A, Thul SG, Kalmady R, Sonvane DD, Kumar V, Gaur UK, Chattopadhyay J, Gupta SK, Kiran AR, Parulekar Y, Agrawal MK, Parmar RM, Reddy GR, Mayya YS, Pithawa CK. Commissioning of the MACE gamma-ray telescope at Hanle, Ladakh, India. CURR SCI INDIA 2022. [DOI: 10.18520/cs/v123/i12/1428-1435] [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: 01/25/2023]
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Ratschow AD, Pandey D, Liebchen B, Bhattacharyya S, Hardt S. Resonant Nanopumps: ac Gate Voltages in Conical Nanopores Induce Directed Electrolyte Flow. Phys Rev Lett 2022; 129:264501. [PMID: 36608199 DOI: 10.1103/physrevlett.129.264501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 09/27/2022] [Accepted: 11/10/2022] [Indexed: 06/17/2023]
Abstract
Inducing transport in electrolyte-filled nanopores with dc fields has led to influential applications ranging from nanosensors to DNA sequencing. Here we use the Poisson-Nernst-Planck and Navier-Stokes equations to show that unbiased ac fields can induce comparable directional flows in gated conical nanopores. This flow exclusively occurs at intermediate driving frequencies and hinges on the resonance of two competing timescales, representing space charge development at the ends and in the interior of the pore. We summarize the physics of resonant nanopumping in an analytical model that reproduces the results of numerical simulations. Our findings provide a generic route toward real-time controllable flow patterns, which might find applications in controlling the translocation of small molecules or nanocolloids.
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Affiliation(s)
- Aaron D Ratschow
- Institute for Nano- and Microfluidics, TU Darmstadt, Alarich-Weiss-Straße 10, D-64237 Darmstadt, Germany
| | - Doyel Pandey
- Department of Mathematics, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, India-721302
| | - Benno Liebchen
- Theory of Soft Matter, Department of Physics, TU Darmstadt, Hochschulstraße 12, D-64289 Darmstadt, Germany
| | - Somnath Bhattacharyya
- Department of Mathematics, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, India-721302
| | - Steffen Hardt
- Institute for Nano- and Microfluidics, TU Darmstadt, Alarich-Weiss-Straße 10, D-64237 Darmstadt, Germany
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Bhattacharyya S, Bhattacharyya S. Demonstration of the Holonomically Controlled Non-Abelian Geometric Phase in a Three-Qubit System of a Nitrogen Vacancy Center. Entropy (Basel) 2022; 24:1593. [PMID: 36359682 PMCID: PMC9689909 DOI: 10.3390/e24111593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 10/24/2022] [Accepted: 10/27/2022] [Indexed: 06/16/2023]
Abstract
The holonomic approach to controlling (nitrogen-vacancy) NV-center qubits provides an elegant way of theoretically devising universal quantum gates that operate on qubits via calculable microwave pulses. There is, however, a lack of simulated results from the theory of holonomic control of quantum registers with more than two qubits describing the transition between the dark states. Considering this, we have been experimenting with the IBM Quantum Experience technology to determine the capabilities of simulating holonomic control of NV-centers for three qubits describing an eight-level system that produces a non-Abelian geometric phase. The tunability of the geometric phase via the detuning frequency is demonstrated through the high fidelity (~85%) of three-qubit off-resonant holonomic gates over the on-resonant ones. The transition between the dark states shows the alignment of the gate's dark state with the qubit's initial state hence decoherence of the multi-qubit system is well-controlled through a π/3 rotation.
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17
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Majhi S, Bhattacharyya S. Numerical study on diffusiophoresis of a hydrophobic nanoparticle in a monovalent or multivalent electrolyte. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129272] [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: 11/03/2022]
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18
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Guha Mallick R, Pramanik S, Pandit MK, Gupta AK, Roy S, Jambhulkar S, Sarker A, Nath R, Bhattacharyya S. Radiosensitivity of seedling traits to varying gamma doses, optimum dose determination and variation in determined doses due to different time of sowings after irradiation and methods of irradiation in faba bean genotypes. Int J Radiat Biol 2022; 99:534-550. [PMID: 35938753 DOI: 10.1080/09553002.2022.2107723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Abstract
PURPOSE Three experiments were conducted to assess the effect of different doses of gamma radiation on various seedling traits; determine the optimum doses of gamma radiation for different faba bean genotypes; find out the variation in optimum doses with respect to the different times of sowings after irradiation and methods of irradiation. MATERIALS AND METHODS Five faba bean genotypes viz., L-2013-060, L-2013-092, Anandnagar Local, Gazipur Local and Bangla Gangachar were used in these experiments. In Experiment I, seeds of five experimental genotypes were exposed to different doses (100 Gy 200 Gy, 300 Gy, 400 Gy, 500 Gy, 600 Gy, 700 Gy and 800 Gy) of gamma radiation and were sown immediately after irradiation. In Experiment II, seeds of Bangla Gangachar and L-2013-060 were exposed to varying doses (100-800 Gy) of gamma radiation and were sown at seven sowings starting from 0 h to 24 h at 4-h intervals after irradiation. In Experiment III, L-2013-092 genotypes was exposed to different doses (100 -800 Gy) of gamma radiation with two different methods of irradiation. RESULTS In Experiment I, the lethal dose 50 (LD50) values have arrived at 140 Gy, 669 Gy, 575 Gy, 386 Gy and 158 Gy for L-2013-060, L-2013-092, Anandnagar Local, Gazipur Local and Bangla Gangachar, respectively. The growth reduction 50 (GR50) doses for different seedling traits ranged from 130 Gy to 320 Gy for L-2013-060, 250 Gy to 480 Gy for L-2013-092, 130 Gy to 370 Gy for Anandnagar Local, 200 Gy to 350 Gy for Gazipur Local and 250 Gy to 400 Gy for Bangla Gangachar. In Experiment II, the values for LD50 of the genotypes Bangla Gangachar and L-2013-060 were significantly singular for different time intervals of sowing. The values of GR50 for most of the seedling traits were found to increase with the delay in sowing after irradiation from 4 to 24 h when compared with the immediately sown seed lots. In Experiment III, LD50 for L-2013-092 was 337 Gy with Method 1 and 669 Gy with Method 2. In Method 1, most of the growth parameters attained GR50 doses lower than Method 2. The first method was found to increase the radiosensitivity of L-2013-092. CONCLUSION Every experimental genotype used in these three experiments showed dose-dependent retardation of different seedling traits. These optimized doses may be employed to establish mutant populations for exploiting the novel traits of faba bean. The time of sowing after irradiation and method of irradiation was found to be essential for confirming optimum doses.
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Affiliation(s)
| | | | | | - Akhilesh Kumar Gupta
- Department of Agricultural Statistics, College of Agriculture, Odisha University of Agriculture and Technology, Bhubaneswar, India
| | - Subhrajit Roy
- Department of Vegetable Science, Faculty of Horticulture, Nadia, India
| | - Sanjay Jambhulkar
- Nuclear Agriculture and Biotechnology Division, Bhabha Atomic Research Centre, Trombay, India
| | - Ashutosh Sarker
- ICARDA - South Asia and China Regional Programme, New Delhi, India
| | - Rajib Nath
- Department of Agronomy, Faculty of Agriculture, Nadia, India
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Kundu M, Chakrabarty S, Bhattacharyya S, Majumdar P. Thermoluminescence glow curve analysis using temperature dependent frequency factor in OTOR model. RADIAT MEAS 2022. [DOI: 10.1016/j.radmeas.2022.106820] [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: 11/15/2022]
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Wang W, Bale S, Verma P, Hasan S, Yalavarthi B, Tsou P, Varga J, Bhattacharyya S. 779 Deficiency of the TLR4 inhibitory homolog RP105 exacerbates fibrosis. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.05.792] [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: 11/29/2022]
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21
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Bale S, Verma P, Yalavarthi B, Arthur Scarneo S, Haystead T, Bhattacharyya S, Varga J. 599 Selective inhibition Of fibro-inflammatory kinase TAK1: A potential therapeutic strategy to ameliorate systemic sclerosis. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.05.608] [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: 10/17/2022]
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22
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Kundu D, Bhattacharyya S, Gopmandal PP. Ion partitioning and ion size effects on streaming field and energy conversion efficiency in a soft nanochannel. Colloid Polym Sci 2022. [DOI: 10.1007/s00396-022-05007-8] [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: 11/03/2022]
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Sarkar I, Sen G, Bhattacharyya S, Gtari M, Sen A. Inter-cluster competition and resource partitioning may govern the ecology of Frankia. Arch Microbiol 2022; 204:326. [PMID: 35576077 DOI: 10.1007/s00203-022-02910-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Revised: 04/09/2022] [Accepted: 04/10/2022] [Indexed: 11/25/2022]
Abstract
Microbes live in a complex communal ecosystem. The structural complexity of microbial community reflects diversity, functionality, as well as habitat type. Delineation of ecologically important microbial populations along with exploration of their roles in environmental adaptation or host-microbe interaction has a crucial role in modern microbiology. In this scenario, reverse ecology (the use of genomics to study ecology) plays a pivotal role. Since the co-existence of two different genera in one small niche should maintain a strict direct interaction, it will be interesting to utilize the concept of reverse ecology in this scenario. Here, we exploited an 'R' package, the RevEcoR, to resolve the issue of co-existing microbes which are proven to be a crucial tool for identifying the nature of their relationship (competition or complementation) persisting among them. Our target organism here is Frankia, a nitrogen-fixing actinobacterium popular for its genetic and host-specific nature. According to their plant host, Frankia has already been sub-divided into four clusters C-I, C-II, C-III, and C-IV. Our results revealed a strong competing nature of CI Frankia. Among the clusters of Frankia studied, the competition index between C-I and C-III was the largest. The other interesting result was the co-occurrence of C-II and C-IV groups. It was revealed that these two groups follow the theory of resource partitioning in their lifestyle. Metabolic analysis along with their differential transporter machinery validated our hypothesis of resource partitioning among C-II and C-IV groups.
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Affiliation(s)
- I Sarkar
- Bioinformatics Facility, University of North Bengal, Siliguri, West Bengal, India
- Department of Botany, University of North Bengal, Siliguri, West Bengal, India
| | - G Sen
- Bioinformatics Facility, University of North Bengal, Siliguri, West Bengal, India
| | - S Bhattacharyya
- Biswa Bangla Genome Centre, Univ. of North Bengal, Siliguri, West Bengal, India
| | - M Gtari
- Unité de Bactériologie Moléculaire and Génomique, Département de Génie Biologique and Chimique, Institut National Des Sciences Appliquéeset de Technologie, Université de Carthage, Carthage, Tunisia
| | - A Sen
- Bioinformatics Facility, University of North Bengal, Siliguri, West Bengal, India.
- Biswa Bangla Genome Centre, Univ. of North Bengal, Siliguri, West Bengal, India.
- Department of Botany, University of North Bengal, Siliguri, West Bengal, India.
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Barman SS, Bhattacharyya S. Finite ion size and ion permittivity effects on gel electrophoresis of a soft particle. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.128088] [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: 11/03/2022]
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25
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Alborikan S, Von Klemperer K, Bhan A, Walker F, Pandya B, Badiani S, Bhattacharyya S, Petersen S, Lloyd G. Blood biomarkers in patients with repaired Tetralogy of Fallot (rTOF); A systematic review and meta-analysis. International Journal of Cardiology Congenital Heart Disease 2021. [DOI: 10.1016/j.ijcchd.2021.100237] [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: 11/29/2022] Open
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Stowell C, Howard J, Demetrescu C, Bhattacharyya S, Mangion K, Vimalesvaran K, Cole G, Rajani R, Sehmi J, Alzetani M, Zolgharni M, Rana B, Francis D, Shun-Shin M. Fully automated global longitudinal strain assessment using artificial intelligence developed and validated by a UK-wide echocardiography expert collaborative. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Left ventricular longitudinal strain has been reported to deliver reproducibility, sensitivity and prognostic value over and above ejection fraction. However, it currently relies on uninspectable proprietary algorithms and suffers from a lack of widespread clinical use. Uptake may be improved by increasing user trust through greater transparency.
Purpose
We therefore developed a machine-learning based method, trained, and validated with accredited experts from our AI Echocardiography Collaborative. We make the dataset, code, and trained network freely available under an open-source license.
Methods
AI enables strain to be calculated without relying on speckle tracking by directly locating key points and borders across frames. Strain can then be calculated as the fractional shortening of the left ventricular perimeter. We first curated a dataset of 7523 images, including 2587 apical four chamber, each labelled by a single expert from our collaboration of 17 hospitals, using our online platform (Figure 1). Using both this dataset and a semi-supervised approach, we trained a 3d convolutional neural network to identify the annulus, apex, and the endocardial border throughout the cardiac cycle.
Separately, we constructed an external validation dataset of 100 apical 4 chamber video-loops. The systolic and diastolic frame were identified, and each image was separately labelled by 11 experts. From these labels we then derived the expert consensus strain for each of the 100 video loops. These experts also ordered all 100 echocardiograms by their visual grading of left ventricular longitudinal function. Finally, a single expert calculated strain using two different proprietary commercial packages (A and B).
Results
Consensus strain measurements (obtained by averaging individual assessments by the 11 experts) across the 100 cases ranged from −4% to −27%, with strong correlations with the individual experts and machine methods (Figure 2). Using each cases' consensus across experts as the gold standard, median error from consensus was 3.1% for individual experts, 3.4% for Propriety A, 2.6% for Proprietary B, 2.6% for our AI.
Using the visual grading of longitudinal strain as the reference, the 11 individual experts and 4 machine methods each showed significant correlation: coefficients ranged from 0.55 to 0.69 for experts, and for Proprietary A was 0.68, Proprietary B 0.69, and our AI 0.69.
Conclusions
Our open-source, vendor-independent AI-based strain measure automatically produces values that agree with expert consensus, as strongly as the individual experts do. It also agrees with the subjective visual ranking by longitudinal function. Our open-source AI strain performs at least as well as closed-source speckle-based approaches, and may enable increased clinical and research use of longitudinal strain.
Funding Acknowledgement
Type of funding sources: Public grant(s) – National budget only. Main funding source(s): NIHR Imperial BRC ITMAT.Dr Howard was additionally funded by Wellcome. Figure 1. Collaborative online platformFigure 2. Correlations between strain methods
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Affiliation(s)
- C Stowell
- Imperial College London, London, United Kingdom
| | - J Howard
- Imperial College London, London, United Kingdom
| | - C Demetrescu
- Guy's & St Thomas' NHS Foundation Trust, London, United Kingdom
| | | | - K Mangion
- University of Glasgow, Glasgow, United Kingdom
| | | | - G Cole
- Imperial College London, London, United Kingdom
| | - R Rajani
- King's College London, London, United Kingdom
| | - J Sehmi
- West Hertfordshire Hospitals NHS Trust, Watford, United Kingdom
| | - M Alzetani
- Luton and Dunstable University Hospital, Luton, United Kingdom
| | - M Zolgharni
- University of West London, London, United Kingdom
| | - B Rana
- Hammersmith Hospital, London, United Kingdom
| | - D Francis
- Imperial College London, London, United Kingdom
| | - M Shun-Shin
- Imperial College London, London, United Kingdom
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Sen P, Purkayastha S, Das D, Goswami J, Sen S, Rai P, Biswas T, Bhattacharyya PK, Bhattacharyya S. Yield-enhancing SPIKE allele from the aus-subtype indica rice and its allele specific codominant marker. J Genet 2021. [DOI: 10.1007/s12041-021-01293-3] [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: 10/21/2022]
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Kundu A, Vangaru S, Bhowmick S, Bhattacharyya S, Mallick AI, Gupta B. One-time Electromagnetic Irradiation Modifies Stress-sensitive Gene Expressions in Rice Plant. Bioelectromagnetics 2021; 42:649-658. [PMID: 34559898 DOI: 10.1002/bem.22374] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 07/17/2021] [Accepted: 09/09/2021] [Indexed: 12/23/2022]
Abstract
Electromagnetic energy is utilized over multiple frequency bands to provide seamless wireless communication services. Plants can well perceive electromagnetic energy present in open environment due to reasonably high permittivity and electrical conductivity of constituent tissues. Moreover, higher surface-to-volume ratio of plant structure facilitates increased interaction with the incident electromagnetic waves. To date, a few well-designed studies have been conducted inside controlled electromagnetic reverberation chambers to investigate either short duration-low amplitude or long duration-periodic electromagnetic irradiation-induced molecular responses in plants. However, as far as is known, studies investigating molecular responses particularly at the mid-vegetative stage in plants following one-time (hours-long) electromagnetic irradiation have not been reported earlier. Hence, the present study aimed at investigating molecular responses in 40-day-old Swarnaprabha rice plants following one-time 1837.50 MHz, 2.75 mW/m2 electromagnetic irradiation of 2 h 30 min duration. Controlled electromagnetic irradiation inside a simple reverberation chamber was ensured to achieve pure electromagnetic environment at 1837.50 MHz with deterministic electromagnetic power density at selected position. Swarnaprabha rice plant was chosen for this investigation since the rice variety is widely cultivated and consumed in the Indian subcontinent. Subsequent alterations in some selected stress-sensitive gene expressions were assayed using real-time quantitative polymerase chain reaction technique-significant upregulation in calmodulin and phytochrome B gene expressions were noted. This investigation was purposefully focused on subsequent molecular responses immediately following electromagnetic irradiation so that the possible effects of secondary stimulations could be avoided. Observed molecular responses strongly suggested that plants perceive 1837.50 MHz, 2.75 mW/m2 electromagnetic irradiation similar to other injurious stimuli. © 2021 Bioelectromagnetics Society.
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Affiliation(s)
- Ardhendu Kundu
- Electronics and Telecommunication Engineering Department, Jadavpur University, Kolkata, India
| | - Sathish Vangaru
- Department of Genetics and Plant Breeding, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, India
| | - Sucharita Bhowmick
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, India
| | - Somnath Bhattacharyya
- Department of Genetics and Plant Breeding, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, India
| | - Amirul I Mallick
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, India
| | - Bhaskar Gupta
- Electronics and Telecommunication Engineering Department, Jadavpur University, Kolkata, India
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Primus C, Bvekerwa I, Clay TA, Mccue M, Wong K, Uppal R, Ambekar S, Das S, Bhattacharyya S, Davies LC, Woldman S, Menezes L. 18F-FDGPET/CT improves diagnostic certainty over the modified Duke Criteria in blood culture negative infective endocarditis. Eur Heart J Cardiovasc Imaging 2021. [DOI: 10.1093/ehjci/jeab111.077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
Introduction
Diagnosis of blood culture negative infective endocarditis (BCNIE) is challenging, with positive microbiology key in the modified Duke Criteria (mDC). ESC IE Guidelines (2015) recommend the use of 18F-FDG PET/CT (PET) in cases where transoesophageal echocardiography (TOE) is equivocal and where cardiac implantable device-related IE (CIDRE) is suspected. We explored the role of PET to improve diagnostic certainty in the challenging cohort of BCNIE.
Methods
Retrospective review of all suspected BCNIE patients undergoing PET (10/2015 to 01/2021). Myocardial suppression technique was used in all cases, and studies were assessed for valve/device avidity. Patients were classified as definite/possible/rejected IE by mDC pre- and post-PET, with incremental benefit assessed by net reclassification index (NRI) versus actual diagnosis. Actual diagnosis was defined by Endocarditis Team consensus or surgical specimen (where available) at a minimum of 2-months following index admission.
Results
PET was performed in 110/807 (13.6%) cases overall. BCNIE prevalence was 18% across the total cohort, with 25/110 (22.7%) PET studies in BCNIE patients (male = 17, mean age 65). (p = 0.16 for PET in BCNIE compared to overall). PET was undertaken in 8 CIDRE, 9 native IE (NVE) and 10 prosthetic IE (PVE); 2-patients had suspected CIDRE + PVE. TOE was performed in all cases, and surgery was required in 8/25 patients. IE was confirmed in 44% of cases.
PET sensitivity, specificity, positive and negative predictive values were 73%, 93%, 89% and 81%, respectively. Addition of PET to the mDC improved re-classification to definite or rejected IE, with NRI 0.633 (positive NRI 0.3; negative 0.333), and added weight to the original mDC classification in 14/25 (56%) of cases.
Conclusion
PET improves diagnostic certainty when combined with mDC in the evaluation of patients with BCNIE across NVE, PVE and CIDRE.
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Affiliation(s)
- C Primus
- Barts Heart Centre, London, United Kingdom of Great Britain & Northern Ireland
| | - I Bvekerwa
- Barts Heart Centre, London, United Kingdom of Great Britain & Northern Ireland
| | - TA Clay
- Barts Heart Centre, London, United Kingdom of Great Britain & Northern Ireland
| | - M Mccue
- Barts Heart Centre, London, United Kingdom of Great Britain & Northern Ireland
| | - K Wong
- Barts Heart Centre, London, United Kingdom of Great Britain & Northern Ireland
| | - R Uppal
- Barts Heart Centre, London, United Kingdom of Great Britain & Northern Ireland
| | - S Ambekar
- Barts Heart Centre, London, United Kingdom of Great Britain & Northern Ireland
| | - S Das
- Barts Heart Centre, London, United Kingdom of Great Britain & Northern Ireland
| | - S Bhattacharyya
- Barts Heart Centre, London, United Kingdom of Great Britain & Northern Ireland
| | - LC Davies
- Barts Heart Centre, London, United Kingdom of Great Britain & Northern Ireland
| | - S Woldman
- Barts Heart Centre, London, United Kingdom of Great Britain & Northern Ireland
| | - L Menezes
- Barts Heart Centre, Barts Heart Centre & UCL Institute of Nuclear Medicine, London, United Kingdom of Great Britain & Northern Ireland
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Laha A, Bhattacharyya S, Sengupta S, Bhattacharyya K, GuhaRoy S. Investigation of arsenic-resistant, arsenite-oxidizing bacteria for plant growth promoting traits isolated from arsenic contaminated soils. Arch Microbiol 2021; 203:4677-4692. [PMID: 34180014 DOI: 10.1007/s00203-021-02460-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 06/21/2021] [Accepted: 06/23/2021] [Indexed: 10/21/2022]
Abstract
The problem of arsenic (As) pollution being severe warrants opting for low-cost microbial remediation strategies. The present study of identifying suitable bacterial strains led to the isolation of eleven As-tolerant strains from the As-contaminated rhizosphere soils of West Bengal, India. They were found to oxidize/reduce 55-31.6% of 5 mM As(III) and 73-37.6% of 5 mM As(V) within 12 h. The four isolates (BcAl-1, JN 73, LAR-2, and AR-30) had a high level of As(III) oxidase activity along with a higher level of As(V) and As(III) resistance. The agar diffusion assay of the isolates further confirmed their ability to endure As stress. The presence of aoxB gene was observed in these four As(III) oxidizing isolates. Evaluation of plant growth-promoting characteristics revealed that BcAl-1 (Burkholderia cepacia), JN 73 (Burkholderia metallica), AR-30 (Burkholderia cenocepacia), and LAR-2 (Burkholderia sp.) had significant plant growth-promoting characteristics (PGP), including the ability to solubilize phosphate, siderophore production, indole acetic acid-like molecules production, ACC deaminase production, and nodule formation under As stressed condition. BcAl-1 and JN 73 emerged as the most promising traits in As removal as well as plant growth promotion.
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Affiliation(s)
- Aritri Laha
- Department of Botany, West Bengal State University, Barasat, Kolkata, West Bengal, 700126, India. .,Department of Genetics and Plant Breeding, Faculty of Agriculture, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal, 741252, India.
| | - Somnath Bhattacharyya
- Department of Genetics and Plant Breeding, Faculty of Agriculture, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal, 741252, India
| | - Sudip Sengupta
- Department of Agricultural Chemistry and Soil Science, Faculty of Agriculture, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal, 741252, India
| | - Kallol Bhattacharyya
- Department of Agricultural Chemistry and Soil Science, Faculty of Agriculture, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal, 741252, India
| | - Sanjoy GuhaRoy
- Department of Botany, West Bengal State University, Barasat, Kolkata, West Bengal, 700126, India
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Gopmandal PP, Bhattacharyya S, Ohshima H. A simplified model for gel electrophoresis of a hydrophobic rigid colloid. Soft Matter 2021; 17:5700-5710. [PMID: 34008689 DOI: 10.1039/d1sm00462j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Electrophoresis of a charged dielectric hydrophobic colloid embedded in a charged hydrogel medium is addressed. A slip velocity condition at the particle surface is considered. The characteristic of the gel electrophoresis is different compared with the free-solution electrophoresis due to the presence of immobile charges of the gel medium, which induces a strong background electroosmotic flow and modifies the Debye layer of the colloid. The gel electrophoresis of the dielectric hydrophobic charged colloid is made based on first-order perturbation analysis. A closed form solution involving simple exponential integrals for the mobility is derived, which reduces to several existing mobility expressions under limiting conditions such as for the gel electrophoresis of hydrophilic particles and a hydrophobic colloid in free-solution electrophoresis. We find that the mobility reversal is achieved by varying the Debye length or gel permeability. For the present first-order perturbation analysis, unlike free-solution electrophoresis, the particle dielectric permittivity is found to influence the mobility. One of the intriguing features of the present study is the derivation of the simplified mobility expression, which can be easily computed for a given set of parameter values.
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Affiliation(s)
- Partha P Gopmandal
- Department of Mathematics, National Institute of Technology Durgapur, Durgapur-713209, India.
| | - S Bhattacharyya
- Department of Mathematics, Indian Institute of Technology Kharagpur, Kharagpur-721302, India
| | - H Ohshima
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda, Chiba, Japan
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Kundu A, Vangaru S, Bhattacharyya S, Mallick AI, Gupta B. Erratum: Electromagnetic Irradiation Evokes Physiological and Molecular Alterations in Rice. Bioelectromagnetics 2021; 42:435. [PMID: 34082476 DOI: 10.1002/bem.22351] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 05/16/2021] [Indexed: 11/11/2022]
Affiliation(s)
- Ardhendu Kundu
- Electronics and Telecommunication Engineering Department, Jadavpur University, Kolkata, West Bengal, India
| | - Sathish Vangaru
- Department of Genetics and Plant Breeding, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal, India
| | - Somnath Bhattacharyya
- Department of Genetics and Plant Breeding, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal, India
| | - Amirul I Mallick
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, West Bengal, India
| | - Bhaskar Gupta
- Electronics and Telecommunication Engineering Department, Jadavpur University, Kolkata, West Bengal, India
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Kundu M, Bhattacharyya S, Karmakar M, Majumdar PS. THREE-POINT AREA METHOD FOR THERMOLUMINESCENCE GLOW CURVE ANALYSIS AND ITS APPLICATION TO THE GLOW PEAK OF K2SRP2O7:PR. Radiat Prot Dosimetry 2021; 193:247-258. [PMID: 33942069 DOI: 10.1093/raddos/ncab048] [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: 12/10/2020] [Revised: 02/17/2021] [Accepted: 03/10/2021] [Indexed: 06/12/2023]
Abstract
A method has been proposed to evaluate the kinetic parameters, viz. activation energy ($E$) and order of kinetics ($b$) from a single or isolated thermoluminescence (TL) glow peak. Along with the area under the entire curve, this method uses a set of three arbitrary data points and calculates the partial area under the curve from each point to the endpoint. In this way, the entire information associated with the curve is used and the method is named as 'Three-Point Area' (TPA) method. We have applied it successfully on a number of theoretically simulated TL curves generated in One Trap One Recombination centre (OTOR) model and General-Order Kinetics (GOK) model under quasi-equilibrium approximations with linear heating scheme. The activation energies are found in good agreement with input values for both the models. For OTOR model, temperature average of order of kinetics is estimated to compare with the present result. Systematic analysis is carried out for estimation of errors inherent in the method in the purview of GOK model. A closer look on the results reveals that any set of three points, preferably chosen from the rising side of the curve, can yield activation energy and order of kinetics. The validity of the method to extract $E$ and $b$ from experimental glow curves is exemplified by considering experimental TL data reported in literature. Finally, a complete study starting from the synthesis of a new phosphor $\mathrm{K_2SrP_2O_7:Pr} $ and analysis of the recorded TL data to estimate $E$ and $b$ employing the TPA method has been reported.
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Affiliation(s)
- M Kundu
- Department of Physics, Acharya Prafulla Chandra College, New Barrackpore, Kolkata 700131, India
- Sadhanpur Uludanga Tulsiram High School (H.S), Amdanga, 24 Parganas (N) 743221, India
| | - S Bhattacharyya
- Department of Physics, Acharya Prafulla Chandra College, New Barrackpore, Kolkata 700131, India
| | - M Karmakar
- Department of Physics, Raghunathpur College, Purulia 723133, India
| | - P S Majumdar
- Department of Physics, Acharya Prafulla Chandra College, New Barrackpore, Kolkata 700131, India
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Banerjee P, Roy C, Jiménez JJ, Morales FM, Bhattacharyya S. Atomically resolved 3D structural reconstruction of small quantum dots. Nanoscale 2021; 13:7550-7557. [PMID: 33928976 DOI: 10.1039/d1nr00466b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Semiconducting quantum dots (QDs) have potential applications in light-emitting diodes, single-photon sources and quantum computing due to shape-dependent (opto) electronic properties. Atomic resolution 3D-structure determination is important in understanding growth kinetics and improving device performance. 3D-reconstruction of large QDs was reported using characterization techniques like atomic force microscopy, atom probe tomography and tilt series electron tomography, but, still, atomic resolution tomography of QDs, especially those sized below 10 nm, is a challenge. Inline-3D-holography is an emerging and promising technique to perform atomic resolution tomography at low electron doses. In the present study, atomically resolved 3D structures of QDs were reconstructed using inline-3D-holography, implemented on InN QDs (<10 nm) grown on a Si substrate. The residual amorphous glue distorts the exit surface geometry; hence an error correction method was proposed. This is the first experimental evidence of pre-pyramid shaped 3D structure of QDs sized below 10 nm that supports theoretical predictions.
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Affiliation(s)
- Pritam Banerjee
- Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai 600036, India.
| | - Chiranjit Roy
- Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai 600036, India.
| | - Juan Jesús Jiménez
- IMEYMAT: Institute of Research on Electron Microscopy and Materials, University of Cádiz, Spain and Department of Materials Science and Metallurgic Engineering, and Inorganic Chemistry, Faculty of Sciences, University of Cádiz, Puerto Real, 11510 Cádiz, Spain
| | - Francisco Miguel Morales
- IMEYMAT: Institute of Research on Electron Microscopy and Materials, University of Cádiz, Spain and Department of Materials Science and Metallurgic Engineering, and Inorganic Chemistry, Faculty of Sciences, University of Cádiz, Puerto Real, 11510 Cádiz, Spain
| | - Somnath Bhattacharyya
- Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai 600036, India.
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Pandey D, Bhattacharyya S, Ghosal S. Charge Selectivity of an Ionic Transistor. Langmuir 2021; 37:4571-4577. [PMID: 33825463 DOI: 10.1021/acs.langmuir.1c00177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The charge selective properties of a long planar nanochannel with an embedded finite uniformly charged section in the middle are studied. The probability flux of a single test ion initially confined to the inlet reservoir is determined by integrating the Smoluchowski equation using a previously published series solution for the Debye-Hückel potential in this geometry. The charge selective properties are characterized by a dimensionless quantity that we call the "fractional blockage". We study how the fractional blockage depends on the dimensionless parameters that characterize the charge state and channel geometry. In the limit of strongly overlapped wall Debye layers, analytical expressions for the fractional blockage are presented that are found to be in good agreement with numerically computed values in the appropriate asymptotic regimes. These results may be helpful in the design of nanofluidic devices that have a variety of applications.
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Affiliation(s)
- Doyel Pandey
- Department of Mathematics, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Somnath Bhattacharyya
- Department of Mathematics, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Sandip Ghosal
- Department of Mechanical Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Department of Engineering Sciences and Applied Mathematics, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
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36
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Das D, Sen P, Purkayastha S, Saha AK, Roy A, Rai P, Sen S, Saha S, Senapati BK, Biswas T, Bhattacharyya S. A perfect PCR based co-dominant marker for low grain-arsenic accumulation genotyping in rice. Ecotoxicol Environ Saf 2021; 212:111960. [PMID: 33513481 DOI: 10.1016/j.ecoenv.2021.111960] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 01/15/2021] [Accepted: 01/18/2021] [Indexed: 06/12/2023]
Abstract
The development of low arsenic-accumulating varieties for the contaminated areas is one of the best options for reducing the dietary exposure of arsenic to human population through rice. In this study, grain-arsenic content in one hundred genotypes revealed a large variation ranging from 0.05 mg/kg to 0.49 mg/kg. Compared to high accumulating variety, Shatabdi, 6-8 times the transcript upregulation of Arsenic sequestering ATP binding cassette C1 type gene (ABCC1), was observed in first internode of low accumulating variety Gobindabhog when 5 mg/kg of arsenite was present in soil. A comparison of the genomic sequence of OsABCC1 identified 8 SNPs between the two genotypes; 5 in introns and 3 silent mutations in exons. We identified a PCR based co-dominant marker targeting an SNP (T/G) between the two genotypes, which clearly distinguished 100 genotypes into low (mean 0.14 mg/kg) and high (mean 0.35 mg/kg) accumulating groups. All aromatic genotypes, either long or small grain, carry the Gobindabhog-type ABCC1 allele and are low accumulators of arsenic. Gobindabhog allele carrying 62 RILs and NILs showed almost 40-50% less As-accumulation in grains relative to 84 RILs and NILs carrying Shatabdi type ABCC1-allele. The marker will be useful in introgression of low accumulating allele of OsABCC1 into high yielding photoperiod insensitive varietal backgrounds more easily and accurately.
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Affiliation(s)
- Dibakar Das
- Department of Genetics and Plant Breeding, Crop Research Unit, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, PIN 741252, West Bengal, India
| | - Poulomi Sen
- Department of Genetics and Plant Breeding, Crop Research Unit, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, PIN 741252, West Bengal, India
| | - Shampa Purkayastha
- Department of Genetics and Plant Breeding, Crop Research Unit, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, PIN 741252, West Bengal, India
| | - Arup Kumar Saha
- Department of Genetics and Plant Breeding, Crop Research Unit, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, PIN 741252, West Bengal, India
| | - Anirban Roy
- Department of Genetics and Plant Breeding, Crop Research Unit, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, PIN 741252, West Bengal, India
| | - Pooja Rai
- Department of Genetics and Plant Breeding, Crop Research Unit, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, PIN 741252, West Bengal, India
| | - Shubhrajyoti Sen
- Department of Genetics and Plant Breeding, Crop Research Unit, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, PIN 741252, West Bengal, India
| | - Shoumik Saha
- Department of Genetics and Plant Breeding, Crop Research Unit, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, PIN 741252, West Bengal, India
| | - Bijoy Kumar Senapati
- Department of Genetics and Plant Breeding, Crop Research Unit, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, PIN 741252, West Bengal, India
| | - Tirthankar Biswas
- College of Agriculture, Bidhan Chandra Krishi Viswavidyalaya, Chatna Campus, PIN 722132, West Bengal, India
| | - Somnath Bhattacharyya
- Department of Genetics and Plant Breeding, Crop Research Unit, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, PIN 741252, West Bengal, India.
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Barman SS, Bhattacharyya S, Dutta P. Electrokinetic actuation of an uncharged polarizable dielectric droplet in charged hydrogel medium. Electrophoresis 2021; 42:920-931. [PMID: 33450075 DOI: 10.1002/elps.202000343] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 12/20/2020] [Accepted: 01/04/2021] [Indexed: 12/21/2022]
Abstract
Electrokinetic transport of an uncharged nonconducting microsized liquid droplet in a charged hydrogel medium is studied. Dielectric polarization of the liquid drop under the action of an externally imposed electric field induces a non-homogeneous charge density at the droplet surface. The interactions of the induced surface charge of the droplet with the immobile charges of the hydrogel medium generates an electric force to the droplet, which actuates the drop through the charged hydrogel medium. A numerical study based on the first principle of electrokinetics is adopted. Dependence of the droplet velocity on its dielectric permittivity, bulk ionic concentration, and immobile charge density of the gel is analyzed. The surface conduction is significant in presence of charged gel, which creates a concentration polarization. The impact of the counterion saturation in the Debye layer due to the dielectric decrement of the medium is addressed. The modified Nernst-Planck equation for ion transport and the Poisson equation for the electric field is considered to take into account the dielectric polarization. A quadrupolar vortex around the uncharged droplet is observed when the gel medium is considered to be uncharged, which is similar to the induced charge electroosmosis around an uncharged dielectric colloid in free-solution. We find that the induced charge electrokinetic mechanism creates a strong recirculation of liquid within the droplet and the translational velocity of the droplet strongly depends on its size for the dielectric droplet embedded in a charged gel medium.
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Affiliation(s)
| | - Somnath Bhattacharyya
- Department of Mathematics, Indian Institute of Technology Kharagpur, Kharagpur, India
| | - Prashanta Dutta
- School of Mechanical and Materials Engineering, Washington State University, Pullman, USA
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Pandey D, Bhattacharyya S. Impact of finite ion size, Born energy difference and dielectric decrement on the electroosmosis of multivalent ionic mixtures in a nanotube. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.125905] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Kundu A, Vangaru S, Bhattacharyya S, Mallick AI, Gupta B. Electromagnetic Irradiation Evokes Physiological and Molecular Alterations in Rice. Bioelectromagnetics 2021; 42:173-185. [PMID: 33427347 DOI: 10.1002/bem.22319] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 12/14/2020] [Accepted: 12/27/2020] [Indexed: 12/27/2022]
Abstract
Electromagnetic energy is the "backbone" of wireless communication systems, and its progressive use is considered to have a low but measurable impact on a wide range of biological systems. Even though a growing amount of data has reported electromagnetic energy absorption in humans along with subsequent biological effects, the consequences of electromagnetic energy absorption on plants have been insufficiently addressed. The higher surface to volume ratio along with the enormous water-ion concentrations makes the plant an ideal model to interact with non-ionizing electromagnetic radiation. In this study, controlled and periodic electromagnetic exposure of 1837.50 MHz, 2.75 W/m2 for 6 h a day on a popular rice variety (var. Satabdi) reduced the seed germination rate. The same dose of periodic electromagnetic exposure upregulated phytochrome B and phytochrome C gene transcripts in 12-day-old seedlings, whereas, in 32-day-old plants, the dose upregulated calmodulin and phytochrome C while the bZIP1 gene showed repression. However, the transcript abundance of bZIP1, phytochrome B, and phytochrome C genes was enhanced even in 12-day-old Satabdi seedlings following instantaneous short-duration (2 h 30 min) controlled electromagnetic exposure to 1837.50 MHz, 2.75 W/m2 . The reported responses in rice were observed below the international electromagnetic regulatory limits. Thus, rice plants perceived electromagnetic energy emitted by the wireless communication system as abiotic stress as per its response by upregulation or repression of known stress-sensing genes. Bioelectromagnetics. © 2020 Bioelectromagnetics Society.
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Affiliation(s)
- Ardhendu Kundu
- Department of Electronics and Telecommunication Engineering, Jadavpur University, Kolkata, India
| | - Sathish Vangaru
- Department of Genetics and Plant Breeding, Bidhan Chandra Krishi Viswavidyalaya, West Bengal, India
| | - Somnath Bhattacharyya
- Department of Genetics and Plant Breeding, Bidhan Chandra Krishi Viswavidyalaya, West Bengal, India
| | - Amirul I Mallick
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, India
| | - Bhaskar Gupta
- Department of Electronics and Telecommunication Engineering, Jadavpur University, Kolkata, India
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Martins D, Rademacher L, Gabay AS, Taylor R, Richey JA, Smith DV, Goerlich KS, Nawijn L, Cremers HR, Wilson R, Bhattacharyya S, Paloyelis Y. Mapping social reward and punishment processing in the human brain: A voxel-based meta-analysis of neuroimaging findings using the social incentive delay task. Neurosci Biobehav Rev 2021; 122:1-17. [PMID: 33421544 DOI: 10.1016/j.neubiorev.2020.12.034] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 12/11/2020] [Accepted: 12/31/2020] [Indexed: 11/18/2022]
Abstract
Social rewards or punishments motivate human learning and behaviour, and alterations in the brain circuits involved in the processing of these stimuli have been linked with several neuropsychiatric disorders. However, questions still remain about the exact neural substrates implicated in social reward and punishment processing. Here, we conducted four Anisotropic Effect Size Signed Differential Mapping voxel-based meta-analyses of fMRI studies investigating the neural correlates of the anticipation and receipt of social rewards and punishments using the Social Incentive Delay task. We found that the anticipation of both social rewards and social punishment avoidance recruits a wide network of areas including the basal ganglia, the midbrain, the dorsal anterior cingulate cortex, the supplementary motor area, the anterior insula, the occipital gyrus and other frontal, temporal, parietal and cerebellar regions not captured in previous coordinate-based meta-analysis. We identified decreases in the BOLD signal during the anticipation of both social reward and punishment avoidance in regions of the default-mode network that were missed in individual studies likely due to a lack of power. Receipt of social rewards engaged a robust network of brain regions including the ventromedial frontal and orbitofrontal cortices, the anterior cingulate cortex, the amygdala, the hippocampus, the occipital cortex and the brainstem, but not the basal ganglia. Receipt of social punishments increased the BOLD signal in the orbitofrontal cortex, superior and inferior frontal gyri, lateral occipital cortex and the insula. In contrast to the receipt of social rewards, we also observed a decrease in the BOLD signal in the basal ganglia in response to the receipt of social punishments. Our results provide a better understanding of the brain circuitry involved in the processing of social rewards and punishment. Furthermore, they can inform hypotheses regarding brain areas where disruption in activity may be associated with dysfunctional social incentive processing during disease.
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Affiliation(s)
- D Martins
- Department of Neuroimaging, Institute of Psychiatry, Psychology and Neuroscience, King's College London, De Crespigny Park, London, SE5 8AF, UK.
| | - L Rademacher
- Department of Psychiatry and Psychotherapy, University of Lübeck, Germany and Department of Psychology, Goethe University Frankfurt, Frankfurt, Germany
| | - A S Gabay
- Department of Experimental Psychology, University of Oxford, New Radcliffe House, Oxford, OX2 6NW, UK
| | - R Taylor
- Department of Neuroimaging, Institute of Psychiatry, Psychology and Neuroscience, King's College London, De Crespigny Park, London, SE5 8AF, UK
| | - J A Richey
- Department of Psychology, Virginia Tech, Blacksburg, USA
| | - D V Smith
- Department of Psychology, Temple University, Philadelphia, PA, 19122, USA
| | - K S Goerlich
- Department of Biomedical Sciences of Cells & Systems, Section Cognitive Neuroscience, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - L Nawijn
- Department of Psychiatry, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Neuroscience, Amsterdam, the Netherlands
| | - H R Cremers
- Department of Clinical Psychology, University of Amsterdam, Amsterdam, the Netherlands
| | - R Wilson
- Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King's College London, De Crespigny Park, London, United Kingdom
| | - S Bhattacharyya
- Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King's College London, De Crespigny Park, London, United Kingdom
| | - Y Paloyelis
- Department of Neuroimaging, Institute of Psychiatry, Psychology and Neuroscience, King's College London, De Crespigny Park, London, SE5 8AF, UK
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Sen P, Purkayastha S, Das D, Goswami J, Sen S, Rai P, Biswas T, Bhattacharyya PK, Bhattacharyya S. Yield-enhancing SPIKE allele from the aus-subtype indica rice and its allele specific codominant marker. J Genet 2021; 100:36. [PMID: 34238776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Improving spikelet number without limiting panicle number is an important strategy to increase rice productivity. In this study, a spikelet number enhancing SPIKE-allele was identified from the aus subtype indica rice, cv. Bhutmuri, which has an identical japonica like corresponding sequence including a retrotransposon sequence, usually absent in indica genotypes, like IR64. An allele-specific singletube PCR-based codominant marker targeting an A/G single-nucleotide polymorphism (SNP) at the 3'UTR was identified for easier genotyping. The yield enhancing ability of the Bhutmuri-SPIKE allele carrying RILs and NILs over IR64-SPIKE allele carrying alleles was due to increased number of filled grains/panicle. More than three times higher abundance of SPIKE transcripts was observed in Bhutmuri and NILs carrying this allele compared with IR64 and its allele carrying NILs. Higher rate of photosynthesis at more than 900 μmolm-2s-1 light intensity and more than six small vascular bundles between the two large vascular bundles in the flag leaves of Bhutmuri and its allele carrying NILs were also observed. The identified SPIKE allele and the marker associated with it will be useful for increasing the productivity of rice by marker-assisted breeding.
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Affiliation(s)
- Poulomi Sen
- Crop Research Unit, Genetics and Plant Breeding, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur 741 252, India.
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Ghule TM, Phani V, Somvanshi VS, Patil M, Bhattacharyya S, Khan MR. Further observations on Meloidogyne enterolobii (Nematoda: Meloidogynidae) infecting guava ( Psidium guajava) in India. J Nematol 2020; 52:e2020-120. [PMID: 33829167 PMCID: PMC8015283 DOI: 10.21307/jofnem-2020-120] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 09/23/2020] [Indexed: 11/29/2022] Open
Abstract
Root-knot nematodes (Meloidogyne spp.) infect a large number of crops including guava. We investigated a population of Meloidogyne sp. infecting guava in the Coimbatore region of Tamil Nadu, India for identification and species confirmation. Detailed morphological and morphometric observations based on second-stage juveniles, males, females, and perineal patterns showed resemblance of the isolated population with the original and subsequent descriptions of M. enterolobii. Isozyme analysis of the young egg-laying females displayed the characteristic esterase phenotype pattern similar to that of M. enterolobii. Additionally, the identity of the nematode population was further validated by M. enterolobii specific SCAR marker and ITS rDNA. Recently published reports on the occurrence and morphological descriptions of M. enterolobii from India are largely incongruent with the original and subsequent redescriptions of the species. Here, we present the most comprehensive morphology and morphometrics of an Indian population of M. enterolobii for its authentic identification.
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Affiliation(s)
- Tushar Manohar Ghule
- Department of Agricultural Entomology, Bidhan Chandra Krishi Viswavidyalaya, Nadia, West Bengal, India
| | - Victor Phani
- Department of Agricultural Entomology, College of Agriculture, Uttar Banga Krishi Viswavidyalaya, Dakshin Dinajpur, West Bengal, India
| | | | - Maya Patil
- Division of Nematology, ICAR - Indian Agricultural Research Institute, New Delhi, India
| | - Somnath Bhattacharyya
- Department of Genetics and Plant Breeding, Bidhan Chandra Krishi Viswavidyalaya, Nadia, West Bengal, India
| | - Matiyar Rahaman Khan
- Division of Nematology, ICAR - Indian Agricultural Research Institute, New Delhi, India
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Ganguly S, Saha S, Vangaru S, Purkayastha S, Das D, Saha AK, Roy A, Das S, Bhattacharyya PK, Mukherjee S, Bhattacharyya S. Identification and analysis of low light tolerant rice genotypes in field conditions and their SSR-based diversity in various abiotic stress tolerant lines. J Genet 2020. [DOI: 10.1007/s12041-020-01249-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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44
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Barman SS, Bhattacharyya S, Gopmandal PP, Ohshima H. Impact of charged polarizable core on mobility of a soft particle embedded in a hydrogel medium. Colloid Polym Sci 2020. [DOI: 10.1007/s00396-020-04751-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Kundu D, Bhattacharyya S, Gopmandal PP, Ohshima H. Settling of a charged hydrophobic rigid colloid in aqueous media under generalized gravitational field. Electrophoresis 2020; 42:1010-1020. [PMID: 33159354 DOI: 10.1002/elps.202000240] [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] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 10/20/2020] [Accepted: 10/25/2020] [Indexed: 11/07/2022]
Abstract
The hindrance created by the induced electric filed on the sedimentation of a charged colloid in an aqueous media is studied through numerical modeling. The colloid is considered to be hydrophobic, sedimenting under gravity or a centrifugal force (generalized gravity). The deformation of the charge cloud around the colloid induces an electric field, which generates electrical dipole force on the colloid. The sedimentation velocity is governed by the balance of an electric force, hydrodynamic drag, and gravitational force. Governing equations based on the first principle of electrokinetics is solved numerically through a control volume approach. The dependence of the sedimentation velocity on the electrical properties and slip length of the colloid is investigated. The sedimentation velocity of the charged colloid is slower than the corresponding uncharged particle and this deviation magnifies as the charge density as well as particle slip length is increased. An enhanced g-factor creates a size dependency of the charged colloids. The induced sedimentation field is obtained to analyze the electrokinetics. Surface hydrophobicity enhances the sedimentation velocity, which in turn manifests the induced sedimentation field. However, the sedimentation velocity of a charged hydrophobic colloid is lower than the corresponding uncharged hydrophobic particle and this deviation manifests as slip length is increased.
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Affiliation(s)
- Dipankar Kundu
- Department of Mathematics, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Somnath Bhattacharyya
- Department of Mathematics, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Partha P Gopmandal
- Department of Mathematics, National Institute of Technology Durgapur, Durgapur, 713209, India
| | - Hiroyuki Ohshima
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki Noda, Chiba, 278-8510, Japan
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Murray RM, Mondelli V, Stilo SA, Trotta A, Sideli L, Ajnakina O, Ferraro L, Vassos E, Iyegbe C, Schoeler T, Bhattacharyya S, Marques TR, Dazzan P, Lopez-Morinigo J, Colizzi M, O'Connor J, Falcone MA, Quattrone D, Rodriguez V, Tripoli G, La Barbera D, La Cascia C, Alameda L, Trotta G, Morgan C, Gaughran F, David A, Di Forti M. The influence of risk factors on the onset and outcome of psychosis: What we learned from the GAP study. Schizophr Res 2020; 225:63-68. [PMID: 32037203 DOI: 10.1016/j.schres.2020.01.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 01/06/2020] [Accepted: 01/09/2020] [Indexed: 01/05/2023]
Abstract
The GAP multidisciplinary study carried out in South London, recruited 410 first episode of psychosis patients and 370 controls; the aim was to elucidate the multiple genetic and environmental factors influencing the onset and outcome of psychosis. The study demonstrated the risk increasing effect of adversity in childhood (especially parental loss, abuse, and bullying) on onset of psychosis especially positive symptoms. Adverse life events more proximal to onset, being from an ethnic minority, and cannabis use also played important roles; indeed, one quarter of new cases of psychosis could be attributed to use of high potency cannabis. The "jumping to conclusions" bias appeared to mediate the effect of lower IQ on vulnerability to psychosis. We confirmed that environmental factors operate on the background of polygenic risk, and that genetic and environment act together to push individuals over the threshold for manifesting the clinical disorder. The study demonstrated how biological pathways involved in the stress response (HPA axis and immune system) provide important mechanisms linking social risk factors to the development of psychotic symptoms. Further evidence implicating an immune/inflammatory component to psychosis came from our finding of complement dysregulation in FEP. Patients also showed an upregulation of the antimicrobial alpha-defensins, as well as differences in expression patterns of genes involved in NF-κB signaling and Cytokine Production. Being of African origin not only increased risk of onset but also of a more difficult course of illness. The malign effect of childhood adversity predicted a poorer outcome as did continued use of high potency cannabis.
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Affiliation(s)
- R M Murray
- Institute of Psychiatry, Psychology and Neuroscience, Department of Psychosis Studies, King's College London, London, UK; Department of Experimental Biomedicine and Clinical Neuroscience, University of Palermo, Palermo, Italy.
| | - V Mondelli
- Institute of Psychiatry, Psychology and Neuroscience, Department of Psychosis Studies, King's College London, London, UK
| | - S A Stilo
- Institute of Psychiatry, Psychology and Neuroscience, Department of Psychosis Studies, King's College London, London, UK; Division of Psychology and Language Sciences, University College London, London, UK
| | - A Trotta
- Institute of Psychiatry, Psychology and Neuroscience, Department of Psychosis Studies, King's College London, London, UK
| | - L Sideli
- Institute of Psychiatry, Psychology and Neuroscience, Department of Psychosis Studies, King's College London, London, UK; Department of Experimental Biomedicine and Clinical Neuroscience, University of Palermo, Palermo, Italy
| | - O Ajnakina
- Institute of Psychiatry, Psychology and Neuroscience, Department of Psychosis Studies, King's College London, London, UK
| | - L Ferraro
- Department of Experimental Biomedicine and Clinical Neuroscience, University of Palermo, Palermo, Italy
| | - E Vassos
- Institute of Psychiatry, Psychology and Neuroscience, Department of Psychosis Studies, King's College London, London, UK
| | - C Iyegbe
- Institute of Psychiatry, Psychology and Neuroscience, Department of Psychosis Studies, King's College London, London, UK
| | - T Schoeler
- Institute of Psychiatry, Psychology and Neuroscience, Department of Psychosis Studies, King's College London, London, UK; Department of Psychiatry, Hospital Universitario Fundación Jiménez Díaz, Madrid, Spain
| | - S Bhattacharyya
- Institute of Psychiatry, Psychology and Neuroscience, Department of Psychosis Studies, King's College London, London, UK
| | - T R Marques
- Institute of Psychiatry, Psychology and Neuroscience, Department of Psychosis Studies, King's College London, London, UK
| | - P Dazzan
- Institute of Psychiatry, Psychology and Neuroscience, Department of Psychosis Studies, King's College London, London, UK
| | - J Lopez-Morinigo
- Institute of Psychiatry, Psychology and Neuroscience, Department of Psychosis Studies, King's College London, London, UK; Department of Psychiatry, Universidad Autónoma de Madrid, Madrid, Spain
| | - M Colizzi
- Institute of Psychiatry, Psychology and Neuroscience, Department of Psychosis Studies, King's College London, London, UK
| | - J O'Connor
- Institute of Psychiatry, Psychology and Neuroscience, Department of Psychosis Studies, King's College London, London, UK; Department of Neuropsychology, Royal Free London NHS Foundation Trust, Royal Free Hospital, London, UK
| | - M A Falcone
- Institute of Psychiatry, Psychology and Neuroscience, Department of Psychosis Studies, King's College London, London, UK
| | - D Quattrone
- Institute of Psychiatry, Psychology and Neuroscience, Department of Psychosis Studies, King's College London, London, UK
| | - V Rodriguez
- Institute of Psychiatry, Psychology and Neuroscience, Department of Psychosis Studies, King's College London, London, UK
| | - G Tripoli
- Institute of Psychiatry, Psychology and Neuroscience, Department of Psychosis Studies, King's College London, London, UK; Department of Experimental Biomedicine and Clinical Neuroscience, University of Palermo, Palermo, Italy
| | - D La Barbera
- Department of Experimental Biomedicine and Clinical Neuroscience, University of Palermo, Palermo, Italy
| | - C La Cascia
- Department of Experimental Biomedicine and Clinical Neuroscience, University of Palermo, Palermo, Italy
| | - L Alameda
- Institute of Psychiatry, Psychology and Neuroscience, Department of Psychosis Studies, King's College London, London, UK
| | - G Trotta
- Institute of Psychiatry, Psychology and Neuroscience, Department of Psychosis Studies, King's College London, London, UK; Department of Medicine and Surgery, University of Milano Bicocca, Monza, Italy
| | - C Morgan
- Institute of Psychiatry, Psychology and Neuroscience, Department of Psychosis Studies, King's College London, London, UK
| | - F Gaughran
- Institute of Psychiatry, Psychology and Neuroscience, Department of Psychosis Studies, King's College London, London, UK
| | - A David
- Institute of Psychiatry, Psychology and Neuroscience, Department of Psychosis Studies, King's College London, London, UK; Institute of Mental Health, University College London, London, UK
| | - M Di Forti
- Institute of Psychiatry, Psychology and Neuroscience, Department of Psychosis Studies, King's College London, London, UK; Department of Experimental Biomedicine and Clinical Neuroscience, University of Palermo, Palermo, Italy
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Gopmandal PP, De S, Bhattacharyya S, Ohshima H. Impact of ion-steric and ion-partitioning effects on electrophoresis of soft particles. Phys Rev E 2020; 102:032601. [PMID: 33075919 DOI: 10.1103/physreve.102.032601] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 08/12/2020] [Indexed: 11/07/2022]
Abstract
A theoretical study on the electrophoresis of a soft particle is made by taking into account the ion steric interactions and ion partitioning effects under a thin Debye layer consideration with negligible surface conduction. Objective of this study is to provide a simple expression for the mobility of a soft particle which accounts for the finite-ion-size effect and the ion partitioning arise due to the Born energy difference between two media. The Donnan potential in the soft layer is determined by considering the ion steric interactions and the ion partitioning effect. The volume exclusion due to the finite ion size is considered by the Carnahan-Starling equation and the ion partitioning is accounted through the difference in Born energy. The modified Poisson-Boltzmann equation coupled with Stokes-Darcy-Brinkman equations are considered to determine the mobility. A closed-form expression for the electrophoretic mobility is obtained, which reduces to several existing expressions for mobility under various limiting cases.
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Affiliation(s)
- Partha P Gopmandal
- Department of Mathematics, National Institute of Technology Durgapur, Durgapur 713209, India
| | - Simanta De
- Department of Mathematics, University of Gour Banga, Malda 732103, India
| | - S Bhattacharyya
- Department of Mathematics, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - H Ohshima
- Faculty of Pharmaceutical Sciences, Tokyo University of Science Noda, Chiba 278-8510, Japan
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Bhattacharyya S, Kumar R, Sengupta G, Hazra AK, Sur TK. Chlorogenic Acid Enriched Green Coffee Ameliorated Renal Injury in Rats. Mymensingh Med J 2020; 29:991-1000. [PMID: 33116107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The incidence of acute kidney injury (AKI) during the treatment with gentamicin (GM) is very common in hospitalized patients. Green coffee bean, containing chlorogenic acid (CGA) has been reported to improve non communicable diseases. In the present study, CGA enriched fraction of green coffee bean was evaluated on GM induced nephrotoxicity in rats. It was a preclinical case-controlled experimental intervention conducted in the Department of Pharmacology, R G Kar Medical College, Kolkata, India from 2016-2019 using animal model. CGA content of green coffee bean extract (GCBE) was isolated and quantified by high performance thin layer chromatography (HPTLC) (6.426%). The rats were treated with GCBE at the dose of 100, 200 and 400mg/kg in gentamicin (GM) induced AKI for five consecutive days. At day 6, the renal function was assessed through analysing urine, blood and renal tissues. GCBE dose dependently and significantly (p<0.001) lowered blood urea, creatinine and potassium while, enhanced sodium compared to AKI control. Moreover, it showed significant elevation in glutathione (GSH), superoxide dismutase (SOD) and catalase (CAT) and reduction in lipid peroxides (p<0.001). It was suggested that chlorogenic acid of green coffee seed can protect kidney through down regulation of p53 transcription factor and thereby attenuation of oxidative stress, inflammation and apoptotic process in renal tubules.
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Affiliation(s)
- S Bhattacharyya
- Dr Swati Bhattacharyya, Associate Professor, Department of Pharmacology, RG Kar Medical College, Kolkata, India; E-mail:
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49
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Nandi S, Mukherjee G, Chen QB, Frauendorf S, Banik R, Bhattacharya S, Dar S, Bhattacharyya S, Bhattacharya C, Chatterjee S, Das S, Samanta S, Raut R, Ghugre SS, Rajbanshi S, Ali S, Pai H, Asgar MA, Das Gupta S, Chowdhury P, Goswami A. First Observation of Multiple Transverse Wobbling Bands of Different Kinds in ^{183}Au. Phys Rev Lett 2020; 125:132501. [PMID: 33034500 DOI: 10.1103/physrevlett.125.132501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Revised: 07/17/2020] [Accepted: 08/27/2020] [Indexed: 06/11/2023]
Abstract
We report the first observation of two wobbling bands in ^{183}Au, both of which were interpreted as the transverse wobbling (TW) band but with different behavior of their wobbling energies as a function of spin. It increases (decreases) with spin for the positive (negative) parity configuration. The crucial evidence for the wobbling nature of the bands, dominance of the E2 component in the ΔI=1 transitions between the partner bands, is provided by the simultaneous measurements of directional correlation from the oriented states ratio and the linear polarization of the γ rays. Particle rotor model calculations with triaxial deformation reproduce the experimental data well. A value of spin, I_{m}, has been determined for the observed TW bands below which the wobbling energy increases and above which it decreases with spin. The nucleus ^{183}Au is, so far, the only nucleus in which both the increasing and the decreasing parts are observed and thus gives the experimental evidence of the complete transverse wobbling phenomenon.
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Affiliation(s)
- S Nandi
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata 700064, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
| | - G Mukherjee
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata 700064, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
| | - Q B Chen
- Physik-Department, Technische Universität München, D-85747 Garching, Germany
| | - S Frauendorf
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - R Banik
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata 700064, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
| | - Soumik Bhattacharya
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata 700064, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
| | - Shabir Dar
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata 700064, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
| | - S Bhattacharyya
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata 700064, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
| | - C Bhattacharya
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata 700064, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
| | - S Chatterjee
- UGC-DAE CSR, Kolkata Centre, Kolkata 700098, India
| | - S Das
- UGC-DAE CSR, Kolkata Centre, Kolkata 700098, India
| | - S Samanta
- UGC-DAE CSR, Kolkata Centre, Kolkata 700098, India
| | - R Raut
- UGC-DAE CSR, Kolkata Centre, Kolkata 700098, India
| | - S S Ghugre
- UGC-DAE CSR, Kolkata Centre, Kolkata 700098, India
| | - S Rajbanshi
- Department of Physics, Presidency University, Kolkata 700043, India
| | - Sajad Ali
- Government General Degree College at Pedong, Kalimpong 734311, India
| | - H Pai
- Saha Institute of Nuclear Physics, Kolkata 700064, India
| | - Md A Asgar
- Department of Physics, Prabhat Kumar College, Contai 721404, India
| | - S Das Gupta
- Victoria Institution (College), Kolkata 700009, India
| | - P Chowdhury
- University of Massachusetts Lowell, Lowell, Massachusetts 01854, USA
| | - A Goswami
- Saha Institute of Nuclear Physics, Kolkata 700064, India
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50
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Das B, Borah B, Bhattacharyya S. COMPARATIVE ANALYSIS OF CARBOXYMETHYL CELLULOSE AND PARTIALLY HYDROLYZED POLYACRYLAMIDE – LOW-SOLID NONDISPERSED DRILLING MUD WITH RESPECT TO PROPER-TY ENHANCEMENT AND SHALE INHIBITION. REFFIT 2020. [DOI: 10.18799/24056537/2020/2/262] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
During drilling, different problems are encountered that can interfere with smooth drilling processes, including the accumulation of cuttings, reduced penetration rates, pipe sticking, loss of wellbore stability, and loss of circulation. These problems are generally encountered with conventional drilling mud, such as the bentonite–barite mud system. Formation damage is the most common problem encountered in bentonite mud systems with high solid content. In this work, we aimed to formulate two low-solid nondispersed (LSND) muds: carboxymethyl cellulose (CMC)–LSND mud and partially hydrolyzed polyacrylamide (PHPA)–LSND mud. A comparative analysis was performed to evaluate their property enhancements. LSND muds aid in maintaining hole stability and proper cutting removal. The results of this work show that the addition of both CMC and PHPA helps to improve drilling fluid properties; however, the PHPA–LSND mud was found to be superior. Shale swelling is a major concern in the petroleum industry, as it causes various other problems, such as pipe sticking, low penetration rates, and bit wear. The effect of these two LSND polymer muds in inhibiting shale swelling was analyzed using shale collected from the Champhai district of Mizoram, India.
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