1
|
Bhattacharyya A, Laycock H, Brett SJ, Beatty F, Kemp HI. Health care professionals' experiences of pain management in the intensive care unit: a qualitative study. Anaesthesia 2024; 79:611-626. [PMID: 38153304 DOI: 10.1111/anae.16209] [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] [Accepted: 11/24/2023] [Indexed: 12/29/2023]
Abstract
Despite the existence of evidence-based guidelines for the assessment and management of pain in the critical care setting, the prevalence of acute pain remains high. Inadequate pain management is associated with longer duration of mechanical ventilation, reduced capacity for rehabilitation and long-term psychological sequelae. This study aimed to describe the experiences of pain management from healthcare professionals working in intensive care units. Healthcare professionals were recruited from intensive care units in London, UK using a purposive sampling technique. Semi-structured interviews were transcribed verbatim. Transcripts were analysed using an inductive thematic analysis technique. Thirty participants were recruited from eight diverse intensive care units. Five themes were identified. First, there was a lack of consensus in pain assessment in the ICU where nursing staff described more knowledge and confidence of validated pain measures than physicians, and concerns over validity and usability were raised. Second, there was a universal perception of resource availability impacting the quality of pain management including high clinical workload, staff turnover and availability of certain pain management techniques. Third, acknowledgement of the importance of pain management was highest in those with experience of interacting with critical care survivors. Fourth, participants described their own emotional reaction to managing those in pain which influenced their learning. Finally, there was a perception that, due to the complexity of the intensive care unit population, pain was de-prioritised and there were conflicting views as to whether standardised analgosedation algorithms were useful. This study provides evidence to suggest interdisciplinary training, collaboratively designed decision-making tools, prioritisation initiatives and research priorities are areas that could be targeted to improve pain management in critical care.
Collapse
Affiliation(s)
| | - H Laycock
- Department of Anaesthesia, Great Ormond Street Hospital, London, UK
| | - S J Brett
- Division of Anaesthesia, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Imperial College London, London, UK
- Directorate of Critical Care, Imperial College Healthcare NHS Trust, London, UK
| | - F Beatty
- Guy's and St Thomas' NHS Trust, London, UK
| | - H I Kemp
- The Pain Research Group, Imperial College London, London, UK
| |
Collapse
|
2
|
Kanekar AS, Bhattacharyya A, Mohapatra PK. Ligand structure and diluent nature in defining improved Am 3+ and Cm 3+ separation using diglycolamides: a combined solvent extraction and DFT study. Dalton Trans 2024; 53:5871-5880. [PMID: 38415375 DOI: 10.1039/d3dt03261b] [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: 02/29/2024]
Abstract
Separation of Am3+ and Cm3+ is one of the most challenging yet unavoidable steps in the back end of the nuclear cycle. Various ligands evaluated for Am/Cm separation have their own merits and demerits, and not a single ligand has been uniquely proposed for this purpose. In the present work, we evaluated N,N,N',N'-tetra-n-octyldiglycolamide (TODGA) vis-à-vis N,N,N',N'-tetra-2-ethylhexyldiglycolamide (T2EHDGA) in combination with a hydrophilic 2,6-bis(1,2,4-triazinyl)pyridine (SO3PhBTP) derivative in the aqueous phase for the separation of Am3+ and Cm3+ from nitric acid medium. The results showed that marginal selectivity for Am3+ over Cm3+ was observed with T2EHDGA in the presence of SO3PhBTP, which was attributed to the difference in the entropy change for their extraction from both the temperature-dependent liquid-liquid extraction and computational studies.
Collapse
Affiliation(s)
- A S Kanekar
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India.
| | - A Bhattacharyya
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India.
| | - P K Mohapatra
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India.
| |
Collapse
|
3
|
Bhattacharyya A, Sharma R, Mishra MK, Chamkha AJ, Mamatha E. Numerical and Statistical Analysis of Dissipative and Heat Absorbing Graphene Maxwell Nanofluid Flow Over a Stretching Sheet. j nanofluids 2021. [DOI: 10.1166/jon.2021.1808] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This paper is basically devoted to carry out an investigation regarding the unsteady flow of dissipative and heat absorbing hydromagnetic graphene Maxwell nanofluid over a linearly stretched sheet taking momentum and thermal slip conditions into account. Ethylene glycol is selected
as a base fluid while graphene particles are considered as nanoparticles. The highly nonlinear mathematical model of the problem is converted into a set of nonlinear coupled differential equations by means of fitting similarity variables. Further, Runge-Kutta Fehlberg algorithms along with
the shooting scheme are instigated to analyse the numerical solution. The variations in graphene Maxwell nanofluid velocity and temperature owing to different physical parameters have been demonstrated via numerous graphs whereas Nusselt number and skin friction coefficients are illustrated
in numeric data form and are reported in different tables. In addition, a statistical method is implemented for multiple quadratic regression estimation analysis on the numerical figures of wall velocity gradient and local Nusselt number to establish the connection among heat transfer rate
and physical parameters. Our numerical findings reveal that the magnetic field, unsteadiness, inclination angle of magnetic field and porosity parameters boost the graphene Maxwell nanofluid velocity while Maxwell parameter has a reversal impact on it. The regression analysis confers that
Nusselt number is more prone to heat absorption parameter as compared to Eckert number. Finally, the numerical findings are compared with those of earlier published articles under restricted conditions to validate the numerical solution. The comparison of numerical findings shows an excellent
conformity among the results.
Collapse
Affiliation(s)
- A. Bhattacharyya
- Department of Mathematics, BMS Institute of Technology and Management, Bengaluru 560064, Karnataka, India
| | - R. Sharma
- Department of Mathematics, GITAM Bengaluru 562163, Karnataka, India
| | - M. K. Mishra
- Department of Mathematics, SAS, VIT - AP University, 522237, Andhra Pradesh, India
| | - Ali J. Chamkha
- Faculty of Engineering, Kuwait College of Science and Technology, Doha District, 35004, Kuwait
| | - E. Mamatha
- Department of Mathematics, GITAM Bengaluru 562163, Karnataka, India
| |
Collapse
|
4
|
Bhattacharyya A, Ferreira PP, Panda K, Masunaga SH, de Faria LR, Correa LE, Santos FB, Adroja DT, Yokoyama K, Dorini TT, Jardim RF, Eleno LTF, Machado AJS. Electron-phonon superconductivity in C-doped topological nodal-line semimetal Zr 5Pt 3: a muon spin rotation and relaxation (μSR) study. J Phys Condens Matter 2021; 34:035602. [PMID: 34592722 DOI: 10.1088/1361-648x/ac2bc7] [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] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 09/30/2021] [Indexed: 06/13/2023]
Abstract
In the present work, we demonstrate that C-doped Zr5Pt3is an electron-phonon superconductor (with critical temperatureTC= 3.8 K) with a nonsymmorphic topological Dirac nodal-line semimetal state, which we report here for the first time. The superconducting properties of Zr5Pt3C0.5have been investigated by means of magnetization, resistivity, specific heat, and muon spin rotation and relaxation (μSR) measurements. We find that at low temperatures, the depolarization rate is almost constant and it can be well described by a single-bands-wave model with a superconducting gap of 2Δ(0)/kBTC= 3.84, somewhat higher than the value of BCS theory. From the transverse field μSR analysis, we estimate the London penetration depthλL= 469 nm, superconducting carrier densityns= 1.83 × 1026 m-3, and effective massm* = 1.428me. The zero field μSR confirms the absence of any spontaneous magnetic field in the superconducting ground state. In order to gain additional insights into the electronic ground state of C-doped Zr5Pt3, we also performed first-principles calculations within the framework of density functional theory (DFT). The observed homogenous electronic character of the Fermi surface as well as the mutual decrease ofTCand density of states at the Fermi level are consistent with the experimental findings of this study. However, the band structure reveals the presence of robust, gapless fourfold-degenerate nodal lines protected by 63screw rotations and glide mirror planes. Therefore, Zr5Pt3represents a novel, unprecedented condensed matter system to investigate the intricate interplay between superconductivity and topology.
Collapse
Affiliation(s)
- A Bhattacharyya
- Department of Physics, Ramakrishna Mission Vivekananda Educational and Research Institute, Howrah 711202, India, Howrah 711202, West Bengal, India
| | - P P Ferreira
- Escola de Engenharia de Lorena, Universidade de São Paulo, DEMAR, Lorena, Brazil
| | - K Panda
- Department of Physics, Ramakrishna Mission Vivekananda Educational and Research Institute, Howrah 711202, India, Howrah 711202, West Bengal, India
| | - S H Masunaga
- Departamento de Física, Centro Universitário FEI, São Bernardo do Campo, Brazil
- Instituto de Física, Universidade de São Paulo, Rua do Matão, 1371, 05508-090, São Paulo, SP, Brazil
| | - L R de Faria
- Escola de Engenharia de Lorena, Universidade de São Paulo, DEMAR, Lorena, Brazil
| | - L E Correa
- Escola de Engenharia de Lorena, Universidade de São Paulo, DEMAR, Lorena, Brazil
| | - F B Santos
- Escola de Engenharia de Lorena, Universidade de São Paulo, DEMAR, Lorena, Brazil
| | - D T Adroja
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, United Kingdom
- Highly Correlated Matter Research Group, Physics Department, University of Johannesburg, Auckland Park 2006, South Africa
| | - K Yokoyama
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, United Kingdom
| | - T T Dorini
- Université de Lorraine, CNRS, IJL, Nancy, France
| | - R F Jardim
- Instituto de Física, Universidade de São Paulo, Rua do Matão, 1371, 05508-090, São Paulo, SP, Brazil
| | - L T F Eleno
- Escola de Engenharia de Lorena, Universidade de São Paulo, DEMAR, Lorena, Brazil
| | - A J S Machado
- Escola de Engenharia de Lorena, Universidade de São Paulo, DEMAR, Lorena, Brazil
| |
Collapse
|
5
|
Arze CA, Springer S, Dudas G, Patel S, Bhattacharyya A, Swaminathan H, Brugnara C, Delagrave S, Ong T, Kahvejian A, Echelard Y, Weinstein EG, Hajjar RJ, Andersen KG, Yozwiak NL. Global genome analysis reveals a vast and dynamic anellovirus landscape within the human virome. Cell Host Microbe 2021; 29:1305-1315.e6. [PMID: 34320399 DOI: 10.1016/j.chom.2021.07.001] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [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: 01/14/2021] [Revised: 04/23/2021] [Accepted: 06/11/2021] [Indexed: 12/14/2022]
Abstract
Anelloviruses are a ubiquitous component of healthy human viromes and remain highly prevalent after being acquired early in life. The full extent of "anellome" diversity and its evolutionary dynamics remain unexplored. We employed in-depth sequencing of blood-transfusion donor(s)-recipient pairs coupled with public genomic resources for a large-scale assembly of anellovirus genomes and used the data to characterize global and personal anellovirus diversity through time. The breadth of the anellome is much greater than previously appreciated, and individuals harbor unique anellomes and transmit lineages that can persist for several months within a diverse milieu of endemic host lineages. Anellovirus sequence diversity is shaped by extensive recombination at all levels of divergence, hindering traditional phylogenetic analyses. Our findings illuminate the transmission dynamics and vast diversity of anelloviruses and set the foundation for future studies to characterize their biology.
Collapse
Affiliation(s)
| | | | - Gytis Dudas
- Gothenburg Global Biodiversity Centre, Gothenburg 413 19, Sweden
| | | | | | | | - Carlo Brugnara
- Department of Laboratory Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA; Department of Pathology, Harvard Medical School, Boston, MA 02115, USA
| | | | - Tuyen Ong
- Ring Therapeutics, Cambridge, MA 02139, USA
| | - Avak Kahvejian
- Ring Therapeutics, Cambridge, MA 02139, USA; Flagship Pioneering, Cambridge, MA 02142, USA
| | - Yann Echelard
- Ring Therapeutics, Cambridge, MA 02139, USA; Flagship Pioneering, Cambridge, MA 02142, USA
| | - Erica G Weinstein
- Ring Therapeutics, Cambridge, MA 02139, USA; Flagship Pioneering, Cambridge, MA 02142, USA
| | - Roger J Hajjar
- Ring Therapeutics, Cambridge, MA 02139, USA; Flagship Pioneering, Cambridge, MA 02142, USA
| | | | | |
Collapse
|
6
|
Shimura Y, Wörl A, Sundermann M, Tsuda S, Adroja DT, Bhattacharyya A, Strydom AM, Hillier AD, Pratt FL, Gloskovskii A, Severing A, Onimaru T, Gegenwart P, Takabatake T. Antiferromagnetic Correlations in Strongly Valence Fluctuating CeIrSn. Phys Rev Lett 2021; 126:217202. [PMID: 34114835 DOI: 10.1103/physrevlett.126.217202] [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: 10/08/2020] [Accepted: 04/29/2021] [Indexed: 06/12/2023]
Abstract
CeIrSn with a quasikagome Ce lattice in the hexagonal basal plane is a strongly valence fluctuating compound, as we confirm by hard x-ray photoelectron spectroscopy and inelastic neutron scattering, with a high Kondo temperature of T_{K}∼480 K. We report a negative in-plane thermal expansion α/T below 2 K, which passes through a broad minimum near 0.75 K. Volume and a-axis magnetostriction for B∥a are markedly negative at low fields and change sign before a sharp metamagnetic anomaly at 6 T. These behaviors are unexpected for Ce-based intermediate valence systems, which should feature positive expansivity. Rather they point towards antiferromagnetic correlations at very low temperatures. This is supported by muon spin relaxation measurements down to 0.1 K, which provide microscopic evidence for a broad distribution of internal magnetic fields. Comparison with isostructural CeRhSn suggests that these antiferromagnetic correlations emerging at T≪T_{K} result from geometrical frustration.
Collapse
Affiliation(s)
- Y Shimura
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8530, Japan
| | - A Wörl
- Experimental Physics VI, Center for Electronic Correlations and Magnetism, University of Augsburg, 86159 Augsburg, Germany
| | - M Sundermann
- Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
- Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany
| | - S Tsuda
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8530, Japan
| | - D T Adroja
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot Oxon OX11 0QX, United Kingdom
- Highly Correlated Matter Research Group, Physics Department, University of Johannesburg, PO Box 524, Auckland Park 2006, South Africa
| | - A Bhattacharyya
- Department of Physics, Ramakrishna Mission Vivekananda Educational and Research Institute, Belur Math, Howrah 711202, West Bengal, India
| | - A M Strydom
- Highly Correlated Matter Research Group, Physics Department, University of Johannesburg, PO Box 524, Auckland Park 2006, South Africa
| | - A D Hillier
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot Oxon OX11 0QX, United Kingdom
| | - F L Pratt
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot Oxon OX11 0QX, United Kingdom
| | - A Gloskovskii
- Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany
| | - A Severing
- Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
- Institute of Physics II, University of Cologne, 50937 Cologne, Germany
| | - T Onimaru
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8530, Japan
| | - P Gegenwart
- Experimental Physics VI, Center for Electronic Correlations and Magnetism, University of Augsburg, 86159 Augsburg, Germany
| | - T Takabatake
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8530, Japan
| |
Collapse
|
7
|
Singh SP, Bhattacharyya A, Mittal A, Pandey A, Tewari A, Latwal A, David B, Adhikari BS, Kumar D, Negi GCS, Mir IA, Tamta KK, Sambhav K, Shekhar M, Phulara M, Manzoor M, Singh N, Tewari P, Ranhotra PS, Singh P, Dhaila P, Sah P, Kumar R, Joshi R, Rawal RS, Rawal R, Singh RD, Shah S, Sharma S, Nanda SA, Gumber S, Singh U, Reshi Z. Indian Himalayan Timberline Ecotone in Response to Climate Change – Initial Findings. CURR SCI INDIA 2021. [DOI: 10.18520/cs/v120/i5/859-871] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
8
|
Khan PN, Bhattacharyya A, Sharma JN, Manohar S. The recovery of strontium from acidic medium using novel strontium selective extractant: An experimental and DFT study. J Hazard Mater 2020; 397:122476. [PMID: 32416382 DOI: 10.1016/j.jhazmat.2020.122476] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 03/03/2020] [Accepted: 03/04/2020] [Indexed: 06/11/2023]
Abstract
In view of the limited solvent system known for the Sr2+ extraction from acidic media, extraction and recovery of 90Sr from acidic medium using novel Octabenzyloxyoctakis[[[(N,N-diethylamino)carbonyl)]methyl]oxy]calix[8]arene (BOC8A) extractant in nitro alkane medium are presented in this paper. BOC8A and nitro alkanes have been synthesized and characterized by 1H NMR, 13C NMR, FTIR and GC-MS techniques. Solvent composition of 0.01 M BOC8A in nitro octane (NO) has been optimized for substantial amount of extraction of strontium from feed acidity of 3.5-4 M nitric acid, (D3.5-4 M HNO3 = 7.1-7.8). Poor extraction of Pu4+, Ba2+, Na+ and UO22+ and negligible extraction of Am3+, Cs+, Ru3+, Nd3+, Zr2+ and trivalent lanthanides are observed. Ion dissociation mechanism was found to be operative involving an extractable complex having Sr2+, BOC8A and HNO3 in a ratio of 1:1:2. About 99 % of Sr2+ from the loaded solvent was recovered with 0.01 M HNO3. DFT calculations were used to predict the structures of free, protonated BOC8A and its complex with Sr2+. DFT result showed reorientation in conformation of BOC8A due to protonation resulting in the Sr2+ extraction from acidic medium with significantly high interaction energy between Sr2+ and diprotonated form of BOC8A.
Collapse
Affiliation(s)
- Pasupati Nath Khan
- Nuclear Recycle Group, Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - A Bhattacharyya
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India; Radio Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
| | - J N Sharma
- G&AMD, Materials Group, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - S Manohar
- Nuclear Recycle Group, Bhabha Atomic Research Centre, Mumbai 400085, India
| |
Collapse
|
9
|
Abstract
In 2008, the US Food and Drug Administration provided guidance for the evaluation of the cardiovascular safety of antidiabetes drugs. The newer antidiabetes drugs, approved after 2008, were therefore evaluated in long-term cardiovascular outcome trials, designed and powered for the assessment of cardiovascular safety. Accordingly, the primary endpoint of these trials was a cardiac composite endpoint. Since 2008, the data from various cardiovascular outcome trials have been reported, including SAVOR-TIMI 53 (saxagliptin), EXAMINE (alogliptin), TECOS (sitagliptin), CARMELINA (linagliptin), CAROLINA (linagliptin), ELIXA (lixisenatide), LEADER (liraglutide), EXSCEL (exenatide once-weekly), SUSTAIN-6 (injectable semaglutide), HARMONY Outcomes (albiglutide), REWIND (dulaglutide), PIONEER-6 (oral semaglutide), EMPA-REG OUTCOME (empagliflozin), the CANVAS Program (canagliflozin) and DECLARE-TIMI 53 (dapagliflozin). Some of these trials subsequently also published data on renal outcomes, although these were secondary or exploratory analyses. Dipeptidyl peptidase-4 inhibitors and glucagon-like peptide-1 receptor agonists had beneficial effects on albuminuria, while sodium-glucose co-transporter-2 inhibitors additionally showed a positive effect on 'hard' renal outcomes. In contrast to the cardiovascular outcome trials, the renal outcome trial of canagliflozin, CREDENCE, assessed a hard renal endpoint as its primary endpoint and showed positive effects on these hard renal outcomes. In this review, we aim to highlight the renal outcome data from the cardiovascular outcome trials and the CREDENCE trial and understand the differences between their results. The post CREDENCE era would appear to reinforce the position of sodium-glucose co-transporter-2 inhibitors as drugs providing cardiorenal protection, in addition to their anti-glycaemic effects.
Collapse
Affiliation(s)
- A Rajani
- Janssen India Medical Affairs, Johnson & Johnson Private Ltd, Mumbai, India
| | - M Sahay
- Department of Nephrology, Osmania Medical College, Hyderabad, India
| | - A Bhattacharyya
- Department of Diabetes and Endocrinology, Manipal Hospital, Bengaluru, India
| | - A Amar
- Janssen India Medical Affairs, Johnson & Johnson Private Ltd, Mumbai, India
| |
Collapse
|
10
|
Bhattacharyya A, Panda K, Adroja DT, Kase N, Biswas PK, Saha S, Das T, Lees MR, Hillier AD. Investigation of superconducting gap structure in HfIrSi using muon spin relaxation/rotation. J Phys Condens Matter 2020; 32:085601. [PMID: 31689696 DOI: 10.1088/1361-648x/ab549e] [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: 06/10/2023]
Abstract
We have investigated the superconducting state of HfIrSi using magnetization, specific heat, muon spin rotation and relaxation ([Formula: see text]SR) measurements. Superconductivity was observed at [Formula: see text] K in both specific heat and magnetization measurements. From an analysis of the transverse-field [Formula: see text]SR data, it is clear that the temperature variation of superfluid density is well fitted by an isotropic Bardeen-Cooper-Schrieffer (BCS) type s-wave gap structure. The superconducting carrier density [Formula: see text] m-3, the magnetic penetration depth, [Formula: see text] nm, and the effective mass, [Formula: see text], were calculated from the TF-[Formula: see text]SR data. Zero-field [Formula: see text]SR data for HfIrSi reveal the absence of any spontaneous magnetic moments below [Formula: see text], indicating that time-reversal symmetry (TRS) is preserved in the superconducting state of HfIrSi. Theoretical investigations suggest that the Hf and Ir atoms hybridize strongly along the c-axis, and that this is responsible for the strong three-dimensionality of this system which screens the Coulomb interaction. As a result, despite the presence of d-electrons in HfIrSi, these correlation effects are weakened, making the electron-phonon coupling more important.
Collapse
Affiliation(s)
- A Bhattacharyya
- Department of Physics, Ramakrishna Mission Vivekananda Educational and Research Institute, Howrah 711202, West Bengal, India
| | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Bhattacharyya A, Adroja DT, Biswas PK, Sato YJ, Lees MR, Aoki D, Hillier AD. Ir 5d-band derived superconductivity in LaIr 3. J Phys Condens Matter 2020; 32:065602. [PMID: 31509814 DOI: 10.1088/1361-648x/ab4389] [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: 06/10/2023]
Abstract
The superconducting properties of rhombohedral LaIr3 were examined using susceptibility, resistivity, heat capacity, and zero-field (ZF) and transverse-field (TF) muon spin relaxation and rotation ([Formula: see text]SR) measurements. The susceptibility and resistivity measurements confirm a superconducting transition below [Formula: see text] K. Two successive transitions are observed in the heat capacity data, one at [Formula: see text] K and a second at 1.2 K below [Formula: see text]. The heat capacity jump is [Formula: see text], which is lower than 1.43 expected for Bardeen-Cooper-Schrieffer (BCS) weak-coupling limit. TF-[Formula: see text]SR measurements reveal a fully gapped s-wave superconductivity with [Formula: see text], which is small compared to the BCS value of 3.56, suggesting weak-coupling superconductivity. The magnetic penetration depth, [Formula: see text], estimated from TF-[Formula: see text]SR gives [Formula: see text] nm, a superconducting carrier density [Formula: see text] carriers m-3 and a carrier effective-mass enhancement factor [Formula: see text]. ZF-[Formula: see text]SR data show no evidence for any spontaneous magnetic fields below [Formula: see text], which demonstrates that time-reversal symmetry is preserved in the superconducting state of LaIr3.
Collapse
Affiliation(s)
- A Bhattacharyya
- Department of Physics, Ramakrishna Mission Vivekananda Educational and Research Institute, Belur Math, Howrah 711202, West Bengal, India
| | | | | | | | | | | | | |
Collapse
|
12
|
Bhattacharyya A, Das SL, Basu DA. Evaluation of Risk Factors of Peripheral Neuropathy in Type 2 Diabetes Mellitus Patients with Special Reference to Vitamin B12 Defi ciency. J Assoc Physicians India 2020; 68:52. [PMID: 31979580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Affiliation(s)
| | - S L Das
- Assam Medical College and Hospital
| | - D A Basu
- Assam Medical College and Hospital
| |
Collapse
|
13
|
Indra A, Dey K, Bhattacharyya A, Berlie A, Giri S. Unveiling spin-glass transition and antiferromagnetic order by μSR studies in spin-chain Sm 2BaNiO 5. J Phys Condens Matter 2019; 31:165801. [PMID: 30681979 DOI: 10.1088/1361-648x/ab01e6] [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: 06/09/2023]
Abstract
We report the zero-field and longitudinal field muon spin relaxation studies in a spin-chain compound Sm2BaNiO5. Two magnetic transitions, that have not been previously detected by the heat capacity and magnetization measurements, are confirmed at 46 and 9 K. The antiferromagnetic order is suggested at 46 K. Analysis of the muon spin polarization unveils the spin-glass transition at 9 K. Time-field scaling relation of the muon spin polarization verifies the spin-spin autocorrelation function following the cut-off power law, which is approximated by the Ogielski form, as employed numerically for characterizing the spin-glasses.
Collapse
Affiliation(s)
- A Indra
- School of Physical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India. Department of Physics, Srikrishna College, Bagula, Nadia, W. B., 741502, India
| | | | | | | | | |
Collapse
|
14
|
Bhattacharyya A, Adroja DT, Panda K, Saha S, Das T, Machado AJS, Cigarroa OV, Grant TW, Fisk Z, Hillier AD, Manfrinetti P. Evidence of a Nodal Line in the Superconducting Gap Symmetry of Noncentrosymmetric ThCoC_{2}. Phys Rev Lett 2019; 122:147001. [PMID: 31050469 DOI: 10.1103/physrevlett.122.147001] [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: 10/14/2018] [Revised: 01/14/2019] [Indexed: 06/09/2023]
Abstract
The newly discovered noncentrosymmetric superconductor ThCoC_{2} exhibits numerous types of unconventional behavior in the field dependent heat capacity data. Here we present the first measurement of the gap symmetry of ThCoC_{2} by muon spin rotation and relaxation (μSR) measurements. The temperature dependence of the magnetic penetration depth measured using the transverse field μSR experiment reveals the evidence of a nodal pairing symmetry. To understand this finding, we carry out calculations of the superconducting pairing eigenvalue and eigenfunction (pairing symmetry) due to the spin-fluctuation mechanism by directly implementing the ab initio band structures. We find that the system possesses a single Fermi surface with considerable three dimensionality and a strong nesting along the k_{z} direction. Such nesting promotes a superconducting state with a cosk_{z}-like pairing symmetry with a prominent nodal line on the k_{z}=±π/2 plane. The result agrees well with the experimental data.
Collapse
Affiliation(s)
- A Bhattacharyya
- Department of Physics, Ramakrishna Mission Vivekananda Educational and Research Institute, Belur Math, Howrah 711202, West Bengal, India
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot Oxon, OX11 0QX, United Kingdom
- Highly Correlated Matter Research Group, Physics Department, University of Johannesburg, P. O. Box 524, Auckland Park 2006, South Africa
| | - D T Adroja
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot Oxon, OX11 0QX, United Kingdom
- Highly Correlated Matter Research Group, Physics Department, University of Johannesburg, P. O. Box 524, Auckland Park 2006, South Africa
| | - K Panda
- Department of Physics, Ramakrishna Mission Vivekananda Educational and Research Institute, Belur Math, Howrah 711202, West Bengal, India
| | - Surabhi Saha
- Department of Physics, Indian Institute of Science, Bangalore 560012, India
| | - Tanmoy Das
- Department of Physics, Indian Institute of Science, Bangalore 560012, India
| | - A J S Machado
- Escola de Engenharia de Lorena, Universidade de São Paulo, P. O. Box 116, Lorena, São Paulo, 12602810
| | - O V Cigarroa
- Escola de Engenharia de Lorena, Universidade de São Paulo, P. O. Box 116, Lorena, São Paulo, 12602810
- Department of Physics and Astronomy, University of California-Irvine, Irvine, California 92697, USA
| | - T W Grant
- Escola de Engenharia de Lorena, Universidade de São Paulo, P. O. Box 116, Lorena, São Paulo, 12602810
- Department of Physics and Astronomy, University of California-Irvine, Irvine, California 92697, USA
| | - Z Fisk
- Department of Physics and Astronomy, University of California-Irvine, Irvine, California 92697, USA
| | - A D Hillier
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot Oxon, OX11 0QX, United Kingdom
| | - P Manfrinetti
- Department of Chemistry, University of Genova, 16146 Genova, Italy
| |
Collapse
|
15
|
Bhattacharyya A, Ansari SA, Prabhu DR, Kumar D, Mohapatra PK. Highly efficient separation of Am3+ and Eu3+ using an aqueous soluble sulfonated BTP derivative by hollow-fiber supported liquid membrane containing TODGA. SEP SCI TECHNOL 2019. [DOI: 10.1080/01496395.2019.1578803] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- A. Bhattacharyya
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, India
- Homi Bhabha National Institute, Mumbai, India
| | - S. A. Ansari
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, India
| | - D. R. Prabhu
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, India
| | - Dheeraj Kumar
- Radiopharmaceuticals Program (RPhP) Group, Board of Radiation and Isotope Technology, Vashi, Navi-Mumbai, India
| | - P. K. Mohapatra
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, India
- Homi Bhabha National Institute, Mumbai, India
| |
Collapse
|
16
|
Rawat N, Kar A, Bhattacharyya A, Yadav AK, Bhattacharyya D, Jha SN, Kumar P, Nayak SK, Tomar BS. Complexation of U(VI) with Cucurbit[5]uril: Thermodynamic and Structural investigation in aqueous medium. Spectrochim Acta A Mol Biomol Spectrosc 2019; 207:354-362. [PMID: 30292112 DOI: 10.1016/j.saa.2018.09.037] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 09/17/2018] [Accepted: 09/18/2018] [Indexed: 06/08/2023]
Abstract
The assessment of cucurbituril (CBn) for selective removal of actinides from nuclear waste streams requires comprehensive understanding of binding parameters and coordination of these complexes. The present work is the first experimental report on complexation of actinide ion with Cucurbit[5]uril (CB5) in solution. The thermodynamic parameters (ΔG, ΔH and ΔS) for complexation of CB5 with U(VI) in formic acid water medium were determined using microcalorimetry and UV-Vis spectroscopy. The enthalpy and entropy of complexation revealed the partial binding of U(VI) to CB5 portal. The partial binding was confirmed by spectroscopic techniques viz. extended X absorption fine structure spectroscopy (EXAFS), 1H and 13C NMR. The EXAFS χ(r) versus r spectra for U-CB5 complex has been fitted from 1.4 to 3.5 Å with two oxygen shells and a carbon shell. The presence of three carbon atom in secondary shell shows the involvement of only three carbonyl oxygens directly bonding to U(VI) which is in contrast to that calculated from gas phase DFT calculation of unhydrated system. The combined effect of hydration and formic acid encapsulation led to the enhanced stability of partially bound U(VI) to CB5. In the present work the binding of formic acid has also been studied by fluorescence spectroscopy. ESI-MS data shows the unusual stabilization of U(VI) by CB5 in gas phase.
Collapse
Affiliation(s)
- Neetika Rawat
- Radioanalytical Chemistry Division, Trombay, Mumbai 400085, India; Homi Bhabha National Institute, Mumbai 400094, India.
| | - Aishwarya Kar
- Radioanalytical Chemistry Division, Trombay, Mumbai 400085, India
| | - A Bhattacharyya
- Radiochemistry Division, Trombay, Mumbai 400085, India; Homi Bhabha National Institute, Mumbai 400094, India
| | - A K Yadav
- Atomic and Molecular Physics Division, Trombay, Mumbai 400085, India
| | - D Bhattacharyya
- Atomic and Molecular Physics Division, Trombay, Mumbai 400085, India; Homi Bhabha National Institute, Mumbai 400094, India
| | - S N Jha
- Atomic and Molecular Physics Division, Trombay, Mumbai 400085, India
| | - P Kumar
- Fuel Chemistry Division, Trombay, Mumbai 400085, India
| | - S K Nayak
- Bioorganic Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India; Homi Bhabha National Institute, Mumbai 400094, India
| | - B S Tomar
- Homi Bhabha National Institute, Mumbai 400094, India
| |
Collapse
|
17
|
Bhattacharyya A, Tahir A, Chandrashekar A, Vasisht S, Stinson L, Omatseye J. A cost-utility analysis of decompressive hemicraniectomy versus medical treatment in the management of space-occupying brain oedema post middle cerebral artery infarction. Eur J Neurol 2018; 26:313-e19. [DOI: 10.1111/ene.13814] [Citation(s) in RCA: 2] [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: 03/31/2018] [Accepted: 09/24/2018] [Indexed: 11/29/2022]
Affiliation(s)
| | - A. Tahir
- Imperial College London Faculty of Medicine; London UK
| | | | - S. Vasisht
- Brighton and Sussex Medical School; Brighton UK
| | - L. Stinson
- King's College London School of Medical Education; London UK
| | - J. Omatseye
- University of Liverpool School of Medicine; Liverpool UK
| |
Collapse
|
18
|
Chatterjee S, Chatterjee A, Jana S, Roy H, Nargis N, Bhattacharyya A. Breast tumor-associated exosomes mediate loss of antitumor immune response by arresting cytotoxic T cell functions in the tumor microenvironment. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy427.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
19
|
Nair HS, Kumar CMN, Adroja DT, Ritter C, Wills AS, Kockelmann WA, Deen PP, Bhattacharyya A, Strydom AM. Magnetic structure and field-dependent magnetic phase diagram of Ni 2In-type PrCuSi. J Phys Condens Matter 2018; 30:435803. [PMID: 30229750 DOI: 10.1088/1361-648x/aae28d] [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: 06/08/2023]
Abstract
The magnetic structure of the ternary equiatomic intermetallic compound PrCuSi is investigated using neutron powder diffraction experiments in 0 T as well as in external magnetic fields up to 2 T. The PrCuSi compound crystallizes in the hexagonal Ni2In-type structure, in the space group P63/mmc. In this structure, cationic ordering of Cu and Si takes place. The antiferromagnetic phase transition in the Pr sublattice takes place at [Formula: see text] K in 0 T. Under an external magnetic field of 2 T, a field-induced ferromagnetic phase is observed. Magnetoelastic coupling is evidenced by an increase in the unit cell volume. Clear signatures of a mixed antiferromagnetic and ferromagnetic phase in weak, intermediate fields, 0.4-0.8 T, are obtained from the present study. Using the present set of experimental data, we construct the H - T phase diagram of PrCuSi.
Collapse
Affiliation(s)
- Harikrishnan S Nair
- Department of Physics, University of Texas at El Paso, 500 W. University Ave, El Paso, TX 79968, United States of America
| | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Ghosh S, Ghosh S, Sinha M, Sadhasivam S, Bhattacharyya A, Samanta R, Nandy A, Saini S, Mishra M, Sengupta S. 1108 Preclinical evaluation of a novel fluoroquinolone for its multi-dimensional therapeutic effects against drug-resistant Propionibacterium acnes induced acne. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.1121] [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]
|
21
|
Bhattacharyya A, Majumdar S, Bhanja SK, Mandal AB, Dash BB. Effect of dietary manipulation and vaccination of turkey breeder hens on immunoglobulin levels of yolk, yolk sac and neonate poults. J Anim Physiol Anim Nutr (Berl) 2018; 102:e957-e963. [PMID: 29352493 DOI: 10.1111/jpn.12865] [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: 08/10/2017] [Accepted: 12/11/2017] [Indexed: 12/01/2022]
Abstract
Two hundred turkey breeder hens and 24 viable toms of 30-35 weeks age of small white variety were distributed into two treatment groups having four replicates of 25 hens and three toms in each treatment. First four replicates were offered a turkey breeder diet (Diet A) (Nutrient requirements of poultry, 1994, National Academic Press, Washington, DC) and the rest four replicates were maintained on a higher plane of nutrition (Diet B) for 8-week duration. After 6 weeks of experimental feeding, two replicates from each treatment groups were vaccinated with ND (R2 B) vaccine. Yolk sac of embryo from birds fed Diet B had a significantly higher (p < .05) IgG, IgM level and HI titre (log 2) than those fed Diet A. HI titre values of embryonic yolk sac from the vaccinated birds fed Diet B were significantly higher (p < .05) than that of the control groups. In addition, HI titre values were significantly higher (p < .05) in the day-old poults of the birds fed Diet B than that of those fed Diet A. There was significantly (p < .01) positive correlation between serum IgG and IgM of the breeder birds and day-old chicks. Similarly, there was significantly (p < .05) positive correlation between yolk IgG and IgM after 1-month experimental feeding and yolk sac IgG and IgM. Positive correlation (p < .05) also existed between yolk sac IgM and day-old chick serum IgM. Furthermore, the HI titres of breeder birds' serum at 14 days post-vaccination were positively correlated with their egg yolk after 10 and 15 days post-vaccination, yolk sac and day-old chicks. Thus, the study envisaged that a higher immunity in neonate poults from turkey breeders maintained on a higher plane of nutrition may be elicited as there was maternal transfer of antibodies from the serum of breeder birds to their offsprings through their yolk sac.
Collapse
Affiliation(s)
- A Bhattacharyya
- Department of Poultry Science, College of Veterinary Science and Animal Husbandry, Mathura, India
| | - S Majumdar
- Central Avian Research Institute, Bareilly, India
| | - S K Bhanja
- Central Avian Research Institute, Bareilly, India
| | - A B Mandal
- Central Avian Research Institute, Bareilly, India
| | - B B Dash
- Indian Veterinary Research Institute, Mukteswar, India
| |
Collapse
|
22
|
Sarkar SK, Bhattacharyya A, Paria K, Mandal SM. A Retrospective Study on Bacteria Causing Blood Stream Infection: Antibiotics Resistance and Management. Indian J Pharm Sci 2018. [DOI: 10.4172/pharmaceutical-sciences.1000390] [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: 11/09/2022] Open
|
23
|
Verma PK, Mohapatra PK, Bhattacharyya A, Yadav AK, Jha SN, Bhattacharyya D. Structural investigations on uranium(vi) and thorium(iv) complexation with TBP and DHOA: a spectroscopic study. NEW J CHEM 2018. [DOI: 10.1039/c7nj04460g] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Spectroscopic studies were carried out to understand the complexation of U(vi) and Th(iv) with tri-butyl phosphate (TBP) and N,N-dihexyl octanamide (DHOA) in different non-aqueous solvents.
Collapse
Affiliation(s)
- P. K. Verma
- Radiochemistry Division
- Bhabha Atomic Research Centre
- Mumbai – 400 085
- India
| | - P. K. Mohapatra
- Radiochemistry Division
- Bhabha Atomic Research Centre
- Mumbai – 400 085
- India
| | - A. Bhattacharyya
- Radiochemistry Division
- Bhabha Atomic Research Centre
- Mumbai – 400 085
- India
| | - A. K. Yadav
- Atomic and Molecular Physics Division, Bhabha Atomic Research Centre
- Mumbai – 400 085
- India
| | - S. N. Jha
- Atomic and Molecular Physics Division, Bhabha Atomic Research Centre
- Mumbai – 400 085
- India
| | - D. Bhattacharyya
- Atomic and Molecular Physics Division, Bhabha Atomic Research Centre
- Mumbai – 400 085
- India
| |
Collapse
|
24
|
Nagarajan V, Bhattacharyya A, Chandiramouli R. Adsorption of ammonia molecules and humidity on germanane nanosheet—A density functional study. J Mol Graph Model 2018; 79:149-156. [PMID: 29169059 DOI: 10.1016/j.jmgm.2017.11.009] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 11/14/2017] [Accepted: 11/15/2017] [Indexed: 11/26/2022]
|
25
|
Percak-Dennett E, He S, Converse B, Konishi H, Xu H, Corcoran A, Noguera D, Chan C, Bhattacharyya A, Borch T, Boyd E, Roden EE. Microbial acceleration of aerobic pyrite oxidation at circumneutral pH. Geobiology 2017; 15:690-703. [PMID: 28452176 DOI: 10.1111/gbi.12241] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [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: 09/05/2015] [Accepted: 03/22/2017] [Indexed: 06/07/2023]
Abstract
Pyrite (FeS2 ) is the most abundant sulfide mineral on Earth and represents a significant reservoir of reduced iron and sulfur both today and in the geologic past. In modern environments, oxidative transformations of pyrite and other metal sulfides play a key role in terrestrial element partitioning with broad impacts to contaminant mobility and the formation of acid mine drainage systems. Although the role of aerobic micro-organisms in pyrite oxidation under acidic-pH conditions is well known, to date there is very little known about the capacity for aerobic micro-organisms to oxidize pyrite at circumneutral pH. Here, we describe two enrichment cultures, obtained from pyrite-bearing subsurface sediments, that were capable of sustained cell growth linked to pyrite oxidation and sulfate generation at neutral pH. The cultures were dominated by two Rhizobiales species (Bradyrhizobium sp. and Mesorhizobium sp.) and a Ralstonia species. Shotgun metagenomic sequencing and genome reconstruction indicated the presence of Fe and S oxidation pathways in these organisms, and the presence of a complete Calvin-Benson-Bassham CO2 fixation system in the Bradyrhizobium sp. Oxidation of pyrite resulted in thin (30-50 nm) coatings of amorphous Fe(III) oxide on the pyrite surface, with no other secondary Fe or S phases detected by electron microscopy or X-ray absorption spectroscopy. Rates of microbial pyrite oxidation were approximately one order of magnitude higher than abiotic rates. These results demonstrate the ability of aerobic microbial activity to accelerate pyrite oxidation and expand the potential contribution of micro-organisms to continental sulfide mineral weathering around the time of the Great Oxidation Event to include neutral-pH environments. In addition, our findings have direct implications for the geochemistry of modern sedimentary environments, including stimulation of the early stages of acid mine drainage formation and mobilization of pyrite-associated metals.
Collapse
Affiliation(s)
- E Percak-Dennett
- Department of Geoscience, NASA Astrobiology Institute, University of Wisconsin-Madison, Madison, WI, USA
| | - S He
- Department of Geoscience, NASA Astrobiology Institute, University of Wisconsin-Madison, Madison, WI, USA
| | - B Converse
- Department of Geoscience, NASA Astrobiology Institute, University of Wisconsin-Madison, Madison, WI, USA
| | - H Konishi
- Department of Geoscience, NASA Astrobiology Institute, University of Wisconsin-Madison, Madison, WI, USA
| | - H Xu
- Department of Geoscience, NASA Astrobiology Institute, University of Wisconsin-Madison, Madison, WI, USA
| | - A Corcoran
- Department of Civil and Environmental Engineering, University of Wisconsin-Madison, Madison, WI, USA
| | - D Noguera
- Department of Civil and Environmental Engineering, University of Wisconsin-Madison, Madison, WI, USA
| | - C Chan
- Department of Geological Sciences, University of Delaware, Newark, DE, USA
| | - A Bhattacharyya
- Department of Soil and Crop Sciences, Colorado State University, Fort Collins, CO, USA
| | - T Borch
- Department of Soil and Crop Sciences, Colorado State University, Fort Collins, CO, USA
| | - E Boyd
- Department of Microbiology & Immunology, Montana State University, Bozeman, MT, USA
| | - E E Roden
- Department of Geoscience, NASA Astrobiology Institute, University of Wisconsin-Madison, Madison, WI, USA
| |
Collapse
|
26
|
Goel G, Chandy M, Bhattacharyya A, Banerjee S, Chatterjee S, Mullick S, Sinha S, Sengupta K, Dhar K, Bhattacharya S, Rudramurthy S, Chakrabarti A. Mortality associated with candidemia in non-neutropenic cancer patients is not less compared to a neutropenic cohort of cancer patients. Eur J Clin Microbiol Infect Dis 2017; 36:2533-2535. [PMID: 28801726 DOI: 10.1007/s10096-017-3078-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 07/24/2017] [Indexed: 10/19/2022]
Affiliation(s)
- G Goel
- Department of Microbiology, Tata Medical Center, 14 Major Arterial Road (E-W), New Town, Kolkata, 700 156, India
| | - M Chandy
- Department of Clinical Hematology, Tata Medical Center, Kolkata, India
| | - A Bhattacharyya
- Department of Pediatric Oncology, Tata Medical Center, Kolkata, India
| | - S Banerjee
- Department of Gastro-intestinal and Hepato-Pancreatic-Biliary Surgery, Tata Medical Center, Kolkata, India
| | - S Chatterjee
- Department of Radiation Oncology, Tata Medical Center, Kolkata, India
| | - S Mullick
- Department of Critical Care, Tata Medical Center, Kolkata, India
| | - S Sinha
- Department of Statistics, Tata Medical Center, Kolkata, India
| | - K Sengupta
- Department of Microbiology, Tata Medical Center, 14 Major Arterial Road (E-W), New Town, Kolkata, 700 156, India
| | - K Dhar
- Department of Microbiology, Tata Medical Center, 14 Major Arterial Road (E-W), New Town, Kolkata, 700 156, India
| | - S Bhattacharya
- Department of Microbiology, Tata Medical Center, 14 Major Arterial Road (E-W), New Town, Kolkata, 700 156, India.
| | - S Rudramurthy
- Department of Microbiology, Post-graduate Institute of Medical Education and Research, Chandigarh, India
| | - A Chakrabarti
- Department of Microbiology, Post-graduate Institute of Medical Education and Research, Chandigarh, India
| |
Collapse
|
27
|
Bhattacharyya A, Adroja DT, Hillier AD, Jha R, Awana VPS, Strydom AM. Superconducting gap structure in the electron doped BiS 2-based superconductor. J Phys Condens Matter 2017; 29:265602. [PMID: 28555613 DOI: 10.1088/1361-648x/aa7189] [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: 06/07/2023]
Abstract
The influence of electron doping on semimetallic SrFBiS2 has been investigated by means of resistivity, zero and transverse - field (ZF/TF) muon spin relaxation/rotation (μSR) experiments. SrFBiS2 is semimetallic in its normal state and small amounts of La doping results in bulk superconductivity at 2.8 K, at ambient pressure. The temperature dependence of the superfluid density as determined by TF-μSR can be best modelled by an isotropic s - wave type superconducting gap. We have estimated the magnetic penetration depth [Formula: see text] nm, superconducting carrier density [Formula: see text] carriers m-3 and effective-mass enhancement m * = 1.558 m e. Additionally, there is no clear sign of the occurrence of spontaneous internal magnetic fields below [Formula: see text], which implies that the superconducting state in this material can not be categorized by the broken time-reversal symmetry which is in agreement with the previous theoretical prediction.
Collapse
Affiliation(s)
- A Bhattacharyya
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot Oxon, OX11 0QX, United Kingdom. Highly Correlated Matter Research Group, Physics Department, University of Johannesburg, PO Box 524, Auckland Park 2006, South Africa. Department of Physics, Ramakrishna Mission Vivekananda University, Belur Math, Howrah 711202, West Bengal, India
| | | | | | | | | | | |
Collapse
|
28
|
Abstract
The physical properties of an intermetallic compound CeRh2Ga2 have been investigated by magnetic susceptibility [Formula: see text], isothermal magnetization M(H), heat capacity [Formula: see text], electrical resistivity [Formula: see text], thermal conductivity [Formula: see text] and thermopower S(T) measurements. CeRh2Ga2 is found to crystallize with CaBe2Ge2-type primitive tetragonal structure (space group P4/nmm). No evidence of long range magnetic order is seen down to 1.8 K. The [Formula: see text] data show paramagnetic behavior with an effective moment [Formula: see text]/Ce indicating Ce3+ valence state of Ce ions. The [Formula: see text] data exhibit Kondo lattice behavior with a metallic ground state. The low-T [Formula: see text] data yield an enhanced Sommerfeld coefficient [Formula: see text] mJ/mol K2 characterizing CeRh2Ga2 as a moderate heavy fermion system. The high-T [Formula: see text] and [Formula: see text] show an anomaly near 255 K, reflecting a phase transition. The [Formula: see text] suggests phonon dominated thermal transport with considerably higher values of Lorenz number L(T) compared to the theoretical Sommerfeld value L 0.
Collapse
Affiliation(s)
- V K Anand
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner Platz 1, D-14109 Berlin, Germany. ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, United Kingdom
| | | | | | | | | |
Collapse
|
29
|
Gupta N, Mishra D, Parihar M, Arora N, Singh M, Sr A, Rath A, Shewale S, Nair R, Bhave S, Chakrapani A, Radhakrishnan V, Bhattacharyya A, Krishnan S, Das A, Saha V, Chandy M. Spectrum of MDS Patients from a Single Tertiary Care Cancer Center in India. Leuk Res 2017. [DOI: 10.1016/s0145-2126(17)30253-9] [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: 10/19/2022]
|
30
|
Mandal G, Biswas S, Gupta A, Bhattacharyya A. 559P Differential association of TGF-β expression with MCP-1 and RANTES expression in primary tumor depending on stages of breast cancer patients from Eastern India. Ann Oncol 2016. [DOI: 10.1016/s0923-7534(21)00717-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
|
31
|
Chatterjee A, Jana S, Bhattacharyya A. 123P Stabilization of SDCBP oncoprotein and aiding breast cancer growth and metastasis: The role of A2BP1. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw577.007] [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: 11/13/2022] Open
|
32
|
Chatterjee A, Jana S, Bhattacharyya A. 123P Stabilization of SDCBP oncoprotein and aiding breast cancer growth and metastasis: The role of A2BP1. Ann Oncol 2016. [DOI: 10.1016/s0923-7534(21)00282-9] [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
|
33
|
Mandal G, Biswas S, Gupta A, Bhattacharyya A. 559P Differential association of TGF-β expression with MCP-1 and RANTES expression in primary tumor depending on stages of breast cancer patients from Eastern India. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw602.004] [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: 11/13/2022] Open
|
34
|
Sivadasan AK, Singha C, Bhattacharyya A, Dhara S. Interface phonon modes in the [AlN/GaN] 20 and [Al 0.35Ga 0.65N/Al 0.55Ga 0.45N] 20 2D multi-quantum well structures. Phys Chem Chem Phys 2016; 18:29864-29870. [PMID: 27759132 DOI: 10.1039/c6cp05520f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The observation of interface (IF) phonon modes in the recorded Raman spectra of c-plane oriented [AlN/GaN]20 and [Al0.35Ga0.65N/Al0.55Ga0.45N]20 multi-quantum well (MQW) structures grown via plasma assisted molecular beam epitaxy is reported. The nominal shift in the IF phonon mode of E1 symmetry for [Al0.35Ga0.65N/Al0.55Ga0.45N]20 compared to that of the [AlN/GaN]20 MQW structure is understood on the basis of change in dielectric constants (εm) of the surrounding medium. The presence of buffer layers in [Al0.35Ga0.65N/Al0.55Ga0.45N]20 MQW over a sapphire substrate is also understood by characterizing the IF phonon mode of A1 symmetry. The observed IF phonon modes in the spectra are attributed to the relaxation of Raman selection rules away from the Brillouin zone centre because of the breakdown of the translational symmetry of surface potential due to the presence of the periodic interfaces and surface modulations in the superlattice structures of MQWs. The corresponding required edge lengths (L) of 2D plates, for the observation of the breakdown of the surface potential, are computed from the simulated dispersion relation curve of IF modes. The integral multiples of uniformly distributed platelets, originated due to the horizontal uneven irregularities on the surface of superlattices, are matched with the calculated L values.
Collapse
Affiliation(s)
- A K Sivadasan
- Nanomaterials and Sensors Section, Surface and Nanoscience Division, Indira Gandhi Centre for Atomic Research, Homi Bhabha National Institute, Kalpakkam-603102, India.
| | - Chirantan Singha
- Centre for Research in Nanoscience and Nanotechnology, University of Calcutta, JD2, Sector-III, Saltlake City, Kolkata-700106, West Bengal, India
| | - A Bhattacharyya
- Institute of Radio Physics and Electronics, University of Calcutta, 92, A.P.C. Road, Kolkata-700009, West Bengal, India
| | - Sandip Dhara
- Nanomaterials and Sensors Section, Surface and Nanoscience Division, Indira Gandhi Centre for Atomic Research, Homi Bhabha National Institute, Kalpakkam-603102, India.
| |
Collapse
|
35
|
Bhattacharyya A, Kumar S. Outcome Analysis of Fernandez Osteotomy in Malunited Extra-Articular Fractures of Distal Radius. Mymensingh Med J 2016; 25:542-549. [PMID: 27612904] [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: 06/06/2023]
Abstract
Deformity of wrist is very common after mal union of extra articular fractures over distal end of Radius. It causes limitation of movements too in different directions with or without pain. Deformity may be treated by different types of corrective osteotomy. We treated cases of this type of malunion with Fernandez osteotomy. This study is to observe the amount of correction and recovery of functional status in patients with malunited distal radius fractures treated with Fernandez osteotomy. This is a prospective study. We treated 10 cases of malunited radius with Fernandez osteotomy from February 2013 to October 2014 in the Departments of Orthopaedics, Medical College and Hospital, Kolkata, India. There were six males and four females with mean age of thirty years (with range from twenty to forty years. Indications for surgical intervention include pain and functional deficit severe enough to interfere significantly with daily activities. Radius is exposed through distal dorsal radial incision and radial osteotomy done two and half centimetre proximal to the wrist joint and after achieving correction; gap is filled with iliac bone graft and fixed with contoured distal radius T-plate. Follow up was for an average one year and three months. Results were excellent in one, satisfactory in four cases, good in four cases and bad in one case. Fernandez osteotomy is valuable option for correction of malunited distal radius fracture especially in young demanding patients.
Collapse
Affiliation(s)
- A Bhattacharyya
- Dr Arunangsu Bhattacharyya, Associate Professor, Department of Orthopaedics, Medical College, Kolkata, West Bengal. India; E-mail:
| | | |
Collapse
|
36
|
Ali SM, Pahan S, Bhattacharyya A, Mohapatra PK. Complexation thermodynamics of diglycolamide with f-elements: solvent extraction and density functional theory analysis. Phys Chem Chem Phys 2016; 18:9816-28. [DOI: 10.1039/c6cp00825a] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Optimized complexes of Lu3+ with TMDGA in 1 : 1, 1 : 2 and 1 : 3 stoichiometric ratios and plots of theoretically calculated stepwise binding energy.
Collapse
Affiliation(s)
- Sk. M. Ali
- Chemical Engineering Division
- Bhabha Atomic Research Centre
- Trombay
- India
| | - S. Pahan
- Process Developement Division
- Bhabha Atomic Research Centre
- Trombay
- India
| | - A. Bhattacharyya
- Radiochemistry Division Bhabha Atomic Research Centre
- Trombay
- India
| | - P. K. Mohapatra
- Radiochemistry Division Bhabha Atomic Research Centre
- Trombay
- India
| |
Collapse
|
37
|
Sarkar SK, Bhattacharyya A, Mandal SM. YnfA , a SMR family efflux pump is abundant in Escherichia coli isolates from urinary infection. Indian J Med Microbiol 2015; 33:139-42. [PMID: 25560019 DOI: 10.4103/0255-0857.148415] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
A quantitative study was undertaken to determine the expression level of different efflux pumps in multi-drug-resistant (MDR) Escherichia coli isolates from urinary infection. We have determined the presence of different efflux pumps and measured the expression level of tolC, mdfA, norE and ynfA genes among 48 isolates by quantitative real-time PCR. The expression level of tolC and ynfA was constantly high and observed among 75-80% of isolates, whereas mdfA and norE were expressed occasionally. Our findings suggest that ynfA, a new SMR efflux pump gene family member increases the antibiotics' resistance in E. coli.
Collapse
Affiliation(s)
| | | | - S M Mandal
- Central Research Facility, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, India
| |
Collapse
|
38
|
Sannigrahi J, Chattopadhyay S, Bhattacharyya A, Giri S, Majumdar S, Venkateshwarlu D, Ganesan V. Two dimensional magnetic correlation in the unconventional corrugated layered oxides (Ba,Sr)₄Mn₃O₁₀. J Phys Condens Matter 2015; 27:056001. [PMID: 25604130 DOI: 10.1088/0953-8984/27/5/056001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Both Ba4Mn3O10 and Sr4Mn3O10 crystallize in an orthorhombic crystal structure consisting of corrugated layers containing Mn3O12 polydedra. The thermal variation of magnetic susceptibility of the compositions consists of a broad hump like feature indicating the presence of low dimensional magnetic correlation. We have systematically investigated the magnetic data of these compounds and found that the experimental results match quite well with the two dimensional Heisenberg model of spin-spin interaction. The two dimensional nature of the magnetic spin-spin interaction is supported by the low temperature heat capacity data of Ba4Mn3O10. Interestingly, both the samples show dielectric anomaly near the magnetic ordering temperature indicating multiferroic behavior.
Collapse
Affiliation(s)
- J Sannigrahi
- Department of Solid State Physics, Indian Association for the Cultivation of Science, 2A & B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
| | | | | | | | | | | | | |
Collapse
|
39
|
Singha Deb AK, Bhattacharyya A, Ali SM, Shenoy KT, Ghosh SK. Diglycolamic Acid Functionalized CNTs for Preferential Selection of Eu(III) over Am(III) Ion: Density Functional Theoretical Modelling Validated by Experiments. SEP SCI TECHNOL 2015. [DOI: 10.1080/01496395.2014.973514] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
40
|
Bhattacharyya A. Study of fluctuations from Polyakov Nambu-Jona-Lasinio Model. Proceedings of the Indian National Science Academy 2015. [DOI: 10.16943/ptinsa/2015/v81i1/48051] [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: 11/13/2022]
|
41
|
Das D, Bhattacharyya A, Anand VK, Hillier AD, Taylor JW, Gruner T, Geibel C, Adroja DT, Hossain Z. Muon spin relaxation study on itinerant ferromagnet CeCrGe₃ and the effect of Ti substitution on magnetism of CeCrGe₃. J Phys Condens Matter 2015; 27:016004. [PMID: 25493957 DOI: 10.1088/0953-8984/27/1/016004] [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: 06/04/2023]
Abstract
A Muon spin relaxation (µSR) study has been performed on the Kondo lattice heavy fermion itinerant ferromagnet CeCrGe3. Recent investigations of bulk properties have revealed a long-range ordering of Cr moments at Tc = 70 K in this compound. Our µSR investigation between 1.2 K and 125 K confirm the bulk magnetic order which is marked by a loss in initial asymmetry below 70 K accompanied with a sharp increase in the muon depolarization rate. Field dependent µSR spectra show that the internal field at the muon site is higher than 0.25 T apparently due to the ferromagnetic nature of ordering. The effect of Ti substitution on the magnetism in CeCrGe3 is presented. A systematic study has been made on polycrystalline CeCr(1-x)Ti(x)Ge3 (0 ⩽ x ⩽ 1) using magnetic susceptibility χ(T), isothermal magnetization M(H), specific heat C(T) and electrical resistivity ρ(T) measurements which clearly reveal that the substitution of Ti for Cr in CeCrGe3 strongly influences the exchange interaction and ferromagnetic ordering of Cr moments. The Cr moment ordering temperature is suppressed gradually with increasing Ti concentration up to x = 0.50 showing Tc = 7 K beyond which Ce moment ordering starts to dominate and a crossover between Cr and Ce moment ordering is observed with a Ce moment ordering Tc = 14 K for x = 1.0. The Kondo lattice behavior is evident from temperature dependence of ρ(T) in all CeCr(1-x)Ti(x)Ge3 samples.
Collapse
Affiliation(s)
- Debarchan Das
- Department of Physics, Indian Institute of Technology, Kanpur 208016, India
| | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Mitra S, Chakrabarti N, Dutta SS, Ray S, Bhattacharya P, Sinha P, Bhattacharyya A. Gender-specific brain regional variation of neurons, endogenous estrogen, neuroinflammation and glial cells during rotenone-induced mouse model of Parkinson's disease. Neuroscience 2015; 292:46-70. [PMID: 25592425 DOI: 10.1016/j.neuroscience.2014.12.052] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [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: 09/23/2014] [Revised: 12/29/2014] [Accepted: 12/30/2014] [Indexed: 12/17/2022]
Abstract
Rotenone (RT) produces reactive oxygen species (ROS) by inhibiting the mitochondrial electron transport chain; causing dopaminergic (DA) cell death in the substantia nigra (SN) and simulates other models of induced Parkinson's disease (PD). There is a sincere dearth of knowledge regarding the status of glial cells, neuroprotective estrogen and the status of neuroinflammatory TNF-α in the different brain regions in either sex during healthy, as well as during PD conditions. In the present study of RT-induced mouse model of PD, we have selected the frontal cortex (FC), hippocampus (HC) and SN from either sex of Swiss albino mice as these are the major regions involved during PD pathogenesis. During non pathogenic conditions, the ROS-scavenging enzyme activity varied among the brain regions and also in between genders. The number of DOPA decarboxylase-positive cells, astrocytes and microglia was similar in the respective regions of the brain in both the sexes. The level of proinflammatory cytokine TNF-α was same in the respective FC and HC in either sex except that of SN. The expression level of estrogen and its receptors varied among the three brain regions. During RT treatment, ROS-scavenging enzyme activities increased, DOPA decarboxylase-positive neurons and fibers in DA as well as in norepinephrinergic (NE) systems become degenerated, number of astrocytes decreased and microglial cells increased in those specific brain regions in either of the sexes except in the SN region of males where astrocyte number remained unaltered and microglial cell percentage decreased. TNF-α increased in the FC and SN but remained unaltered in the HC of both sexes. Estradiol level decreased in the HC and SN but the level unevenly varied in the FC. Similarly, the estrogen bound and nuclear-cytosolic receptor α and β also varied differentially among the brain regions of the two sexes. Therefore our present study depicts that there exists a clear variation of neuronal and astroglial cell population, estrogen and its receptor levels in different brain regions of both the sexes during control and RT-treated pathogenic condition and these variations have major implication in PD pathogenesis and progression.
Collapse
Affiliation(s)
- S Mitra
- Immunology Lab, Department of Zoology, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, India
| | - N Chakrabarti
- Department of Physiology, University of Calcutta, 92, Acharya Prafulla Chandra Road, Kolkata 700009, India
| | - S S Dutta
- Immunology Lab, Department of Zoology, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, India
| | - S Ray
- Immunology Lab, Department of Zoology, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, India
| | - P Bhattacharya
- Immunology Lab, Department of Zoology, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, India
| | - P Sinha
- Department of Physiology, University of Calcutta, 92, Acharya Prafulla Chandra Road, Kolkata 700009, India
| | - A Bhattacharyya
- Immunology Lab, Department of Zoology, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, India.
| |
Collapse
|
43
|
Rawat N, Kar A, Bhattacharyya A, Rao A, Nayak SK, Nayak C, Jha SN, Bhattacharyya D, Tomar BS. Complexation of Eu(iii) with Cucurbit[n]uril, n = 5 and 7: A Thermodynamic and Structural Study. Dalton Trans 2015; 44:4246-58. [DOI: 10.1039/c4dt03623a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An investigation of Eu(iii) CBn complexes in solution using calorimetry, TRFS, EXAFS and DFT calculations shows the presence of Eu(iii) in different binding modes depending on the cavity size of CBn and the stoichiometry of the complex.
Collapse
Affiliation(s)
- Neetika Rawat
- Radioanalytical Chemistry Division
- Bhabha Atomic Research Centre
- Mumbai – 4000 085
- India
| | - Aishwarya Kar
- Radioanalytical Chemistry Division
- Bhabha Atomic Research Centre
- Mumbai – 4000 085
- India
| | - A. Bhattacharyya
- Radiochemistry Division
- Bhabha Atomic Research Centre
- Mumbai – 4000 085
- India
| | - Ankita Rao
- Radioanalytical Chemistry Division
- Bhabha Atomic Research Centre
- Mumbai – 4000 085
- India
| | - S. K. Nayak
- Bioorganic Chemistry Division
- Bhabha Atomic Research Centre
- Mumbai – 4000 085
- India
| | - C. Nayak
- Atomic and Molecular Physics Division
- Bhabha Atomic Research Centre
- Mumbai – 4000 085
- India
| | - S. N. Jha
- Atomic and Molecular Physics Division
- Bhabha Atomic Research Centre
- Mumbai – 4000 085
- India
| | - D. Bhattacharyya
- Atomic and Molecular Physics Division
- Bhabha Atomic Research Centre
- Mumbai – 4000 085
- India
| | - B. S. Tomar
- Radioanalytical Chemistry Division
- Bhabha Atomic Research Centre
- Mumbai – 4000 085
- India
| |
Collapse
|
44
|
Bhattacharyya A, Mohapatra PK. A Novel Solvent System Involving Terpyridine and Cyanex-301 for Am(III) and Eu(III) Separation from Weakly Acidic Feeds. SEP SCI TECHNOL 2014. [DOI: 10.1080/01496395.2014.940542] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
45
|
Sarathi Patra P, Das K, Bhattacharyya A, Ray S, Hembram J, Sanyal S, Dhali GK. Natural resolution or intervention for fluid collections in acute severe pancreatitis. Br J Surg 2014; 101:1721-8. [PMID: 25329330 DOI: 10.1002/bjs.9666] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Revised: 06/23/2014] [Accepted: 09/05/2014] [Indexed: 12/20/2022]
Abstract
BACKGROUND Revisions in terminology of fluid collections in acute pancreatitis have necessitated reanalysis of their evolution and outcome. The course of fluid collections in patients with acute pancreatitis was evaluated prospectively. METHODS Consecutive adults with acute pancreatitis, who had contrast-enhanced CT (CECT) within 5-7 days of symptom onset, were enrolled in a prospective cohort study in a tertiary-care centre. Patients were treated according to standard guidelines. Follow-up transabdominal ultrasonography was done at 4-week intervals for at least 6 months. CECT was repeated at 6-10 weeks, or at any time if there were new or persistent symptoms. Asymptomatic collections were followed until spontaneous resolution. Risk factors for pancreatic pseudocysts or walled-off necrosis (WON) were assessed in multivariable analyses. RESULTS Of 122 patients with acute pancreatitis, 109 were analysed. Some 91 patients (83·5 per cent) had fluid collections at baseline. Eleven of 29 with interstitial oedematous pancreatitis had acute peripancreatic fluid collections, none of which evolved into pseudocysts. All 80 patients with acute necrotizing pancreatitis had at least one acute necrotizing collection (ANC); of these, five patients died (2 after drainage), three underwent successful drainage within 5 weeks, and collections resolved spontaneously in 33 and evolved into WON in 39. By 6 months' follow-up, WON had required drainage in eight patients, resolved spontaneously in 23 and was persistent but asymptomatic in seven. Factors associated with increased risk of WON were blood urea nitrogen 20 mg/dl or more (odds ratio (OR) 10·96, 95 per cent c.i. 2·57 to 46·73; P = 0·001) and baseline ANC diameter greater than 6 cm (OR 14·57, 1·60 to 132·35; P = 0·017). Baseline ANC diameter over 6 cm was the only independent predictor of either the need for drainage or persistence of such collections beyond 6 months (hazard ratio 6·61, 1·77 to 24·59; P = 0·005). CONCLUSION Pancreatic pseudocysts develop infrequently in oedematous acute pancreatitis. Only one-quarter of ANCs either require intervention or persist beyond 6 months, whereas more than one-half of WONs resolve without any intervention within 6 months of onset. Baseline diameter of ANC(s) is an important predictor of outcome.
Collapse
Affiliation(s)
- P Sarathi Patra
- Divisions of Gastroenterology, School of Digestive and Liver Diseases, Institute of Post-Graduate Medical Education and Research, Kolkata, India
| | | | | | | | | | | | | |
Collapse
|
46
|
Menaka R, Narendra BS, Sandeep J, Bhattacharyya A. Comparing conventional and analogue insulin in hospitalised patients. J Assoc Physicians India 2014; 62:765-766. [PMID: 25856960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
|
47
|
Anand VK, Adroja DT, Bhattacharyya A, Hillier AD, Taylor JW, Strydom AM. Investigations of the singlet ground state system: PrIrSi3. J Phys Condens Matter 2014; 26:306001. [PMID: 24994692 DOI: 10.1088/0953-8984/26/30/306001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report our comprehensive study of physical properties of a ternary intermetallic compound PrIrSi3 investigated by dc magnetic susceptibility χ(T), isothermal magnetization M(H), thermo-remnant magnetization M(t), ac magnetic susceptibility χac(T), specific heat Cp(T), electrical resistivity ρ(T), muon spin relaxation (µSR) and inelastic neutron scattering (INS) measurements. A magnetic phase transition is marked by a sharp anomaly at Ttr = 12.2 K in χ(T) measured at low applied fields which is also reflected in the Cp(T) data through a weak anomaly at 12 K. An irreversibility between the zero field cooled and field cooled χ(T) data below 12.2 K and a very large relaxation time of M(t) indicates the presence of ferromagnetic correlation. The magnetic part of specific heat shows a broad Schottky-type anomaly near 40 K due to the crystal electric field (CEF) effect. An extremely small value of magnetic entropy below 12 K suggests a CEF-split singlet ground state which is confirmed from our analysis of INS data. The INS spectra show two prominent inelastic excitations at 8.5 meV and 18.5 meV that could be well accounted by a CEF model. The CEF splitting energy between the ground state singlet and the first excited doublet is found to be 92 K. Our µSR data reveal a possible magnetic ordering below 30 K, which is much higher than that found from the specific heat and magnetic susceptibility measurements. This could be due to the presence of short range correlations well above the long range magnetic ordering or due to the electronic changes induced by muons. The induced moment magnetism in the singlet ground state system PrIrSi3 with such a large splitting energy of 92 K is quite surprising.
Collapse
Affiliation(s)
- V K Anand
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, UK. Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner Platz 1, D-14109 Berlin, Germany
| | | | | | | | | | | |
Collapse
|
48
|
Chaudhury S, Bhattacharyya A, Goswami A. Electrodriven Ion Transport through Crown Ether–Nafion Composite Membrane: Enhanced Selectivity of Cs+ over Na+ by Ion Gating at the Surface. Ind Eng Chem Res 2014. [DOI: 10.1021/ie500934v] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sanhita Chaudhury
- Radiochemistry
Division, Bhabha Atomic Research Centre, Mumbai - 400 085, Maharashtra, India
| | - A. Bhattacharyya
- Radiochemistry
Division, Bhabha Atomic Research Centre, Mumbai - 400 085, Maharashtra, India
| | - A. Goswami
- Radiochemistry
Division, Bhabha Atomic Research Centre, Mumbai - 400 085, Maharashtra, India
| |
Collapse
|
49
|
Bhattacharyya A, Cooper A, Hong A, Iland H, McNeil C. Successful management of life-threatening disseminated intravascular coagulopathy due to metastatic melanoma. Intern Med J 2014; 44:207-8. [PMID: 24528820 DOI: 10.1111/imj.12342] [Citation(s) in RCA: 3] [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: 07/28/2013] [Accepted: 11/09/2013] [Indexed: 11/30/2022]
Affiliation(s)
- A Bhattacharyya
- Institute of Haematology, Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
| | | | | | | | | |
Collapse
|
50
|
Bhattacharyya A, Chen S, Zhu M. Graphene reinforced ultra high molecular weight polyethylene with improved tensile strength and creep resistance properties. EXPRESS POLYM LETT 2014. [DOI: 10.3144/expresspolymlett.2014.10] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
|