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Sarkar P, Neogi S, De S. Accelerated radical generation from visible light driven peroxymonosulfate activation by Bi 2MoO 6/doped gCN S-scheme heterojunction towards Amoxicillin mineralization: Elucidation of the degradation mechanism. J Hazard Mater 2023; 451:131102. [PMID: 36870125 DOI: 10.1016/j.jhazmat.2023.131102] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 02/16/2023] [Accepted: 02/26/2023] [Indexed: 06/18/2023]
Abstract
A novel S-scheme photocatalyst Bi2MoO6 @doped gCN (BMO@CN) was prepared through a facile microwave (MW) assisted hydrothermal process and further employed to degrade Amoxicillin (AMOX), by peroxymonosulfate (PMS) activation with visible light (Vis) irradiation. The reduction in electronic work functions of the primary components and strong PMS dissociation generate abundant electron/hole (e-/h+) pairs and SO4*-,*OH,O2*-reactive species, inducing remarkable degeneration capacity. Optimized doping of Bi2MoO6 on doped gCN (upto 10 wt%) generates excellent heterojunction interface with facile charge delocalization and e-/h+ separation, as a combined effect of induced polarization, layered hierarchical structure oriented visible light harvesting and formation of S-scheme configuration. The synergistic action of 0.25 g/L BMO(10)@CN and 1.75 g/L PMS dosage can degrade 99.9% of AMOX in less than 30 min of Vis irradiation, with a rate constant (kobs) of 0.176 min-1. The mechanism of charge transfer, heterojunction formation and the AMOX degradation pathway was thoroughly demonstrated. The catalyst/PMS pair showed a remarkable capacity to remediate AMOX-contaminated real-water matrix. The catalyst removed 90.1% of AMOX after five regeneration cycles. Overall, the focus of this study is on the synthesis, illustration and applicability of n-n type S-scheme heterojunction photocatalyst to the photodegradation and mineralization of typical emerging pollutants in the water matrix.
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Affiliation(s)
- Poulomi Sarkar
- Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Sudarsan Neogi
- Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Sirshendu De
- Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
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Sarkar P, Banerjee S, Saha SA, Mitra P, Sarkar S. Genome surveillance of SARS-CoV-2 variants and their role in pathogenesis focusing on second wave of COVID-19 in India. Sci Rep 2023; 13:4692. [PMID: 36949118 PMCID: PMC10031706 DOI: 10.1038/s41598-023-30815-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 03/01/2023] [Indexed: 03/24/2023] Open
Abstract
India had witnessed unprecedented surge in SARS-CoV-2 infections and its dire consequences during the second wave of COVID-19, but the detailed report of the epidemiological based spatiotemporal incidences of the disease is missing. In the manuscript, we have applied various statistical approaches (correlation, hierarchical clustering) to decipher the pattern of pathogenesis of the circulating VoCs responsible for surge in the incidences. B.1.617.1 (Kappa) was the predominant VoC during the early phase of the second wave, whereas, Delta (B.1.617.2) or Delta-like (AY.x) VoC constitutes majority ([Formula: see text]%) of the cases during the peak of the second wave. The correlation plot of Delta/Delta-like lineage demonstrates inverse correlation with other lineages including B.1.617.1, B.1.1.7, B.1, B.1.36.29 and B.1.36. The spatiotemporal analysis shows that most of the Indian states were affected during the peak of the second wave due to the Delta surge, and fall under the same cluster. The second cluster populated mostly by north-eastern states and the islands of India were minimally affected. The presence of signature mutations (T478K, D950N, E156G) along with L452K, D614G and P681R within the spike protein of Delta or Delta-like might cause elevation in the host cell attachment, increased transmission and altered antigenicity which in due course of time has replaced the other circulating variants.The timely assessment of new VoCs including Delta-like will provide a rationale for updating the diagnostic, vaccine development by medical industries and decision making by various agencies including government, educational institutions, and corporate industries.
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Affiliation(s)
- Poulomi Sarkar
- CSIR-Indian Institute of Chemical Biology (IICB), Calcutta, WB, 700032, India
- IICB-Translational Research Unit of Excellence, Cancer Biology and Inflammatory Disorder, Salt Lake, WB, 700091, India
| | - Sarthak Banerjee
- CSIR-Indian Institute of Chemical Biology (IICB), Calcutta, WB, 700032, India
- IICB-Translational Research Unit of Excellence, Cancer Biology and Inflammatory Disorder, Salt Lake, WB, 700091, India
| | - Sarbar Ali Saha
- CSIR-Indian Institute of Chemical Biology (IICB), Calcutta, WB, 700032, India
- IICB-Translational Research Unit of Excellence, Cancer Biology and Inflammatory Disorder, Salt Lake, WB, 700091, India
| | - Pralay Mitra
- Indian Institute of Technology (IIT) Kharagpur, Computer Science and Engineering, Kharagpur, WB, 721302, India
| | - Siddik Sarkar
- CSIR-Indian Institute of Chemical Biology (IICB), Calcutta, WB, 700032, India.
- IICB-Translational Research Unit of Excellence, Cancer Biology and Inflammatory Disorder, Salt Lake, WB, 700091, India.
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Khatun MM, Rahman M, Islam MJ, Haque SE, Adam IF, Chau Duc NH, Sarkar P, Haque MN, Islam MR. Socio-economic inequalities in undiagnosed, untreated, and uncontrolled diabetes mellitus in Bangladesh: is there a gender difference? Public Health 2023; 218:1-11. [PMID: 36933353 DOI: 10.1016/j.puhe.2023.01.035] [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: 06/08/2022] [Revised: 11/13/2022] [Accepted: 01/31/2023] [Indexed: 03/18/2023]
Abstract
OBJECTIVES We aimed to determine: (1) the prevalence and socio-economic distribution of undiagnosed, untreated, and uncontrolled diabetes mellitus (DM); (2) the relationship between socio-economic status (SES) and undiagnosed, untreated, and uncontrolled DM; and (3) if this relationship is mediated by gender. STUDY DESIGN Cross-sectional nationally representative household-based survey. METHODS We used data from the Bangladesh Demographic Health Survey from 2017 to 18. Our findings were based on the responses of 12,144 individuals aged 18 years and older. As a measure of SES, we focused on standard of living (hereinafter referred to as wealth). The study's outcome variables were prevalence of total (diagnosed + undiagnosed), undiagnosed, untreated, and uncontrolled DM. We used three regression-based approaches-adjusted odds ratio, relative inequality index, and slope inequality index-to assess different aspects of SES differences in the prevalence of total, undiagnosed, untreated, and uncontrolled DM. We used logistic regression analysis to look at the adjusted association between SES and the outcomes after gender stratification to see whether gender status moderates the association between SES and the targeted outcomes. RESULTS In our sample analysis, the age-adjusted prevalence of total, undiagnosed, untreated, and uncontrolled DM was 9.1%, 61.4%, 64.7%, and 72.1%, respectively. Females had a higher prevalence of DM and undiagnosed, untreated, and uncontrolled DM than males. When compared to people in the poor SES group, people in the rich and middle SES groups had 2.60 times (95% confidence interval [CI] 2.05-3.29) and 1.47 times (95% CI 1.18-1.83) higher chance of developing DM. When compared to individuals in the poor SES group, those in the rich SES groups were 0.50 (95% CI 0.33-0.77) and 0.55 times (95% CI 0.36-0.85) less likely to have undiagnosed and untreated DM. CONCLUSIONS In Bangladesh, rich SES groups were more likely than poor SES groups to have DM, whereas poor SES groups with DM were less likely than rich SES groups to be aware of their disease and obtain treatment. The government and other concerned parties are urged by this study to pay more attention to developing suitable policy measures to reduce the risk of DM, particularly among rich SES groups, as well as targeted efforts to screen for and diagnose DM in socio-economically disadvantaged groups.
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Affiliation(s)
- M M Khatun
- Department of Population Science and Human Resource Development University of Rajshahi, Rajshahi 6205, Bangladesh
| | - M Rahman
- Department of Population Science and Human Resource Development University of Rajshahi, Rajshahi 6205, Bangladesh.
| | - M J Islam
- Griffith Criminology Institute, Griffith University, Mount Gravatt, QLD 4122, Australia
| | - S E Haque
- Uchicago Research Bangladesh, Bangladesh
| | - I F Adam
- Faculty of Public Health, University of Khartoum, Sudan
| | - N H Chau Duc
- Hue University of Medicine and Pharmacy, Hue University, Viet nam
| | - P Sarkar
- Dr. Wazed Research and Training Institute, Begum Rokeya University, Rangpur, Bangladesh
| | - M N Haque
- Department of Population Science and Human Resource Development University of Rajshahi, Rajshahi 6205, Bangladesh
| | - M R Islam
- Department of Population Science and Human Resource Development University of Rajshahi, Rajshahi 6205, Bangladesh
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Gupta P, Sarkar P, Upadhyaya S. Clinical variables and pre-operative depression levels for prediction of pain severity in patients undergoing heart surgery. CM 2023. [DOI: 10.18137/cardiometry.2023.26.879884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023] Open
Abstract
Objective: In patients undergoing heart surgery, severe pain is common and may raise the risk of heart conditions, morbidity, and death. The study's goals were to evaluate post-cardiac surgery pain predictors, such as clinical variables and depression, as well as perioperative Pain Severity (PS). Methods: The research included 98 heart surgery patients in total. PS was analysed utilizing a Numerical Rating System (NRS). From the second day after surgery through the seventh day, pain levels were monitored daily. Clinical data was obtained, and depression levels were determined utilizing the Center for Epidemiological Study of Depression (CES-D). Results: From pre-operative levels, pain severe dramatically increased while hospitalized, peaking at day 2 after surgery. Higher CES-D preoperative values in gender, heart function, smoking, and a high Body mass index (BMI). Preoperative CES-D ratings were considerably higher for patients in severe pain than for those with no pain or mild pain. Patients experiencing severe pain (NRS 7 to 10) exhibited considerably greater white blood cell (WBC) counts than those free of pain or mild pain (NRS 0 to 6) (p=0.01). However, there was no association between maximum WBC levels after surgery and CES-D scores. Conclusion: Following surgery, PS considerably increased and was linked to depressive symptoms, gender, heart function, BMI, and smoking. These variables could be used as a starting point for detection and treatment to help stop the progression of acute pain into chronic pain.
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Sarkar P, Neogi S, De S. Activation of peroxymonosulfate by S-scheme Bi2S3/doped gCN heterostructure photocatalyst for highly efficient visible light driven tetracycline degradation: Insights into reaction mechanisms. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2022.122908] [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: 12/23/2022]
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Singh A, Sarkar P, Saxena N. Diagnostic criteria, pathogenesis, and precautionary measures for severe renal damage linked with heart surgery: a retrospective analysis. CM 2023. [DOI: 10.18137/cardiometry.2023.26.885891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023] Open
Abstract
Background: Heart surgery (HS) complications such as renal damage (RD), which is a frequent and major consequence, are linked to higher mortality and morbidity rates as well as a significant financial burden. Several different pathophysiological ideas might explain the multifaceted complexity of the HS-RD pathogenesis. Aim: The purpose of this research is to identify RD after HS and to evaluate the results of diagnostic criteria, pathogenesis, and preventative measures. Methods: This retrospective analysis of HS patients examined the occurrence and impact of several definitions of RD, Renal Damage Network (RDN), and Kidney Disease: Improving Global Outcomes (KDIGO) or risk, injury, failure, loss, and end-stage kidney disease (RIFLE). We also defined transient RD and sustained RD. Results: RIFLE-Risk had the greatest positive probability ratio of every definition, continued with sustained RD (positive likelihood ratio = 2.27) for the best definition. 39 patients with KDIGO RD and all 80 patients having late RD were excluded from the RD defined by RDN criteria. Conclusion: The pathogenesis, definition, diagnosis, and preventative measures of RD in HS patients are discussed in this article. Based on the capacity to forecast short-term mortality, the risk was shown to be the most accurate definition of RD, followed by injury, failure, loss, and end-stage RD.
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Sarkar P, Biswas A, Kumar R, Rai S, Jha SN, Bhattacharyya D. Role of C and B 4C barrier layers in controlling diffusion propagation across the interface of Cr/Sc multilayers. Phys Chem Chem Phys 2023; 25:3072-3082. [PMID: 36620902 DOI: 10.1039/d2cp03785h] [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: 01/10/2023]
Abstract
The optical performance of low-bilayer-thickness metallic multilayers (ML) can be improved significantly by limiting the intermixing of consecutive layers at the interfaces. Barrier layers are supposed to exhibit a decisive role in controlling diffusion across the interfaces. The element-specific grazing incidence extended X-ray absorption fine structure technique using synchrotron radiation has been used in conjunction with grazing incidence X-ray reflectivity and diffuse X-ray scattering measurements to study the impact of the two most common barrier layers, viz., C and B4C, at the interfaces of Cr/Sc MLs. The diffusion propagation is reduced by both the barrier layers; however, it is found that the improvement is more significant with the B4C barrier layer. It is seen that C forms an intermixed layer with Sc and leads to carbide formation at the interface, which then acts as shielding and prevents further interdiffusion, while B4C hardly penetrates into Sc and stops the overlap between Sc and Cr directly by wetting the corresponding interface. Thus, the above measurements reveal crucial and precise information regarding the elemental diffusion kinetics at the interfaces of Cr/Sc MLs in a non-destructive way, which is very important for technological applications of these MLs as X-ray optical devices.
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Affiliation(s)
- P Sarkar
- Atomic & Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
| | - A Biswas
- Atomic & Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
| | - Ravi Kumar
- Atomic & Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
| | - S Rai
- Synchrotron Utilisation Section, Raja Ramnna Centre for Advanced Technology, Indore 752013, India
| | - S N Jha
- Beamline Development & Applications Section Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - D Bhattacharyya
- Atomic & Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
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Sarkar P, Banerjee S, Chakrabarti S, Chakrabarti P, Bandyopadhyay A, Mitra AG, Saha S, Roy A, Sarkar S. Genome characterization, phylogenomic assessment and spatio-temporal dynamics study of highly mutated BA variants from India. Indian J Med Microbiol 2022; 43:66-72. [PMID: 36400646 PMCID: PMC9664238 DOI: 10.1016/j.ijmmb.2022.10.006] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 09/08/2022] [Accepted: 10/19/2022] [Indexed: 11/17/2022]
Abstract
Purpose The emergence of highly mutated and transmissible BA variants has caused an unprecedented surge in COVID-19 infections worldwide. Thorough analysis of its genome structure and phylogenomic evolutionary details will serve as scientific reference for future research. Method Here, we have analyzed the BA variants from India using whole-genome sequencing, spike protein mutation study, spatio-temporal surveillance, phylogenomic assessment and epitope mapping. Results The predominance of BA.2/BA.2-like was observed in India during COVID-19 third wave. Genome analysis and mutation study highlighted the existence of 2128 amino acid changes within BA as compared to NC_045512.2. Presence of 23 unknown mutation sites (spanning region 61–831) were observed among the Indian BA variants as compared to the global BA strains. Unassigned probable Omicron showed the highest number of mutations (370) followed by BA.1 (104), BA.2.3 (56), and BA.2 (27). Presence of mutations ‘Q493R + Q498R + N501Y’, and ‘K417 N + E484A + N501Y’ remained exclusive to BA.2 as well as unassigned probable Omicron. The time-tree and phylogenomic network assessed the evolutionary relationship of the BA variants. Existence of 424 segregating sites and 113 parsimony informative sites within BA genomes were observed through haplotype network analysis. Epitope mapping depicted the presence of unique antigenic sites within the receptor binding domain of the BA variants that could be exploited for robust vaccine development. Conclusion These findings provide important scientific insights about the nature, diversity, and evolution of Indian BA variants. The study further divulges in the avenues of therapeutic upgradation for better management and eventual eradication of COVID-19.
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Affiliation(s)
- Poulomi Sarkar
- CSIR-Indian Institute of Chemical Biology (IICB), Kolkata, WB 700032, India,IICB-Translational Research Unit of Excellence, Salt Lake, WB 700091, India
| | - Sarthak Banerjee
- CSIR-Indian Institute of Chemical Biology (IICB), Kolkata, WB 700032, India,IICB-Translational Research Unit of Excellence, Salt Lake, WB 700091, India
| | - Saikat Chakrabarti
- CSIR-Indian Institute of Chemical Biology (IICB), Kolkata, WB 700032, India,IICB-Translational Research Unit of Excellence, Salt Lake, WB 700091, India
| | - Partha Chakrabarti
- CSIR-Indian Institute of Chemical Biology (IICB), Kolkata, WB 700032, India
| | - Arun Bandyopadhyay
- CSIR-Indian Institute of Chemical Biology (IICB), Kolkata, WB 700032, India,IICB-Translational Research Unit of Excellence, Salt Lake, WB 700091, India
| | | | - Soumen Saha
- MEDICA Super-specialty Hospital, Kolkata, India
| | - Aviral Roy
- MEDICA Super-specialty Hospital, Kolkata, India
| | - Siddik Sarkar
- CSIR-Indian Institute of Chemical Biology (IICB), Kolkata, WB 700032, India,IICB-Translational Research Unit of Excellence, Salt Lake, WB 700091, India,Corresponding author. CSIR-Indian Institute of Chemical Biology (IICB), Kolkata, WB-700032, India
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Yu L, Sarkar P, Urbina P, Milad M. 7723 Adverse Events Using Advanced Sealing Devices during Vaginal Hysterectomy: An Analysis of the Maude Database. J Minim Invasive Gynecol 2022. [DOI: 10.1016/j.jmig.2022.09.326] [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: 11/25/2022]
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Omar R, Sarkar P, Mamun A, Mitchell D, Kommu S. A simple stitch to aid dorsal vein complex ligation with subsequent completion of robot assisted radical prostatectomy at sustained low-pressure pneumoperitoneum. EUR UROL SUPPL 2022. [DOI: 10.1016/s2666-1683(22)02155-3] [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: 11/05/2022] Open
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Sarkar P, Kommu S, Streeter E. Robotic assissted resection of incidentally detected Meckel’s Diverticulum. EUR UROL SUPPL 2022. [DOI: 10.1016/s2666-1683(22)02205-4] [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: 11/05/2022] Open
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Sarkar P, Roy D, Bera B, De S, Neogi S. Enhanced photodegradation of reactive dyes in textile effluent with CoFe 2O 4/g-CN heterostructure-mediated peroxymonosulphate activation. Environ Sci Pollut Res Int 2022; 29:50566-50583. [PMID: 35235117 DOI: 10.1007/s11356-022-18944-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [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: 10/22/2021] [Accepted: 01/25/2022] [Indexed: 06/14/2023]
Abstract
Graphitic carbon nitride (g-C3N4) was employed as a sacrificial substructure and two-dimensional support to develop magnetic cobalt ferrite-carbon nitride (CoFe2O4/g-CN) composite via a one-step solid combustion method. The catalyst activated peroxymonosulphate (PMS), through the interconversion of Co2 + /3+|surf. and Fe2 + /3+|surf. on its surface for degradation of reactive dyes (RDs). Excellent ferromagnetic nature (44.15 emu g-1) of the catalyst led to its efficient magnetic separation. With an optimum catalyst and PMS dose of 0.4 g L-1 and 1.5 g L-1, 99% RD removal was achieved for textile effluent (pH 9.5-10), under UV irradiation (48 W). In-depth radical scavenging experiments and EPR analysis confirmed the dominance of radical-based degradation process. Plausible degradation and mineralization pathways of RDs were proposed through identification of intermediates by LCMS/MS analysis. In brief, this study elucidates an exclusive strategy towards the use of g-C3N4 as fuel for facile synthesis of magnetic CoFe2O4/g-CN as a remarkable photocatalyst for activation of PMS towards mineralization of various industrially relevant RDs.
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Affiliation(s)
- Poulomi Sarkar
- Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Debashis Roy
- Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Biswajit Bera
- Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Sirshendu De
- Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Sudarsan Neogi
- Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India.
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Bass E, Bertonelli Tanaka M, Connor M, Walters U, Eldred-Evans D, Sarkar P, Hosking-Jervis F, Bhola-Stewart H, Pegers E, Powell L, Leelamany D, Wong K, Ahmad S, Tam H, Gordon S, Hrouda D, Mccracken S, Winkler M, Ahmed H. Identifying men affected by changes in PSA screening in the COVID-19 pandemic. Eur Urol 2022. [PMCID: PMC9155264 DOI: 10.1016/s0302-2838(22)00455-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Choudhary M, Sarkar P, Kumar Sharma S, Kajla A, Neogi S. Quantification of reactive species generated in pulsed electrical discharge plasma reactor and its application for 17α-ethinylestradiol degradation in different water matrices. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119173] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Walters U, Connor M, Bass E, Eldred-Evans D, Maynard W, Sarkar P, Bertoncelli Tanaka M, Hosking-Jervis F, Bhola-Stewart H, Pegers E, Powell L, Leelamany D, Wong K, Ahmad S, Tam H, Mccracken S, Gordon S, Hrouda D, Qazi H, Winkler M, Ahmed H. Switching from sedation to local anaesthetic transperineal prostate biopsies: A cost-benefit analysis. Eur Urol 2021. [DOI: 10.1016/s0302-2838(21)01262-8] [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: 10/20/2022]
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Sarkar P, Biswas A, Abharana N, Rai S, Modi MH, Bhattacharyya D. Interface modification of Cr/Ti multilayers with C barrier layer for enhanced reflectivity in the water window regime. J Synchrotron Radiat 2021; 28:224-230. [PMID: 33399572 DOI: 10.1107/s1600577520013429] [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: 07/08/2020] [Accepted: 10/07/2020] [Indexed: 06/12/2023]
Abstract
The influence of a carbon barrier layer to improve the reflectivity of Cr/Ti multilayers, intended to be used in the water window wavelength regime, is investigated. Specular grazing-incidence X-ray reflectivity results of Cr/Ti multilayers with 10 bilayers show that interface widths are reduced to ∼0.24 nm upon introduction of a ∼0.3 nm C barrier layer at each Cr-on-Ti interface. As the number of bilayers increases to 75, a multilayer with C barrier layers maintains almost the same interface widths with no cumulative increase in interface imperfections. Using such interface-engineered Cr/C/Ti multilayers, a remarkably high soft X-ray reflectivity of ∼31.6% is achieved at a wavelength of 2.77 nm and at a grazing angle of incidence of 16.2°, which is the highest reflectivity reported so far in the literature in this wavelength regime. Further investigation of the multilayers by diffused grazing-incidence X-ray reflectivity and grazing-incidence extended X-ray absorption fine-structure measurements using synchrotron radiation suggests that the improvement in interface microstructure can be attributed to significant suppression of inter-diffusion at Cr/Ti interfaces by the introduction of C barrier layers and also due to the smoothing effect of the C layer promoting two-dimensional growth of the multilayer.
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Affiliation(s)
- P Sarkar
- Atomic and Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - A Biswas
- Atomic and Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - N Abharana
- Atomic and Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - S Rai
- Synchrotron Utilisation Section, Raja Ramnna Centre for Advanced Technology, Indore 752013, India
| | - M H Modi
- Synchrotron Utilisation Section, Raja Ramnna Centre for Advanced Technology, Indore 752013, India
| | - D Bhattacharyya
- Atomic and Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
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Bhowmick A, Sarkar P, Baruah MP, Bodhini D, Radha V, Mohan V, Banu S. Association of SLC30A8, CDKAL1, TCF7L2 and HHEX Gene Polymorphisms with Type 2 Diabetes in the Population of North East India. CYTOL GENET+ 2020. [DOI: 10.3103/s0095452720020036] [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: 12/22/2022]
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Mikhail E, Tamhane N, Sarkar P, Sappenfield E, Tanner J, Imudia A. Laparoscopic Entry Technique with a Veress Needle Insertion with and without Concomitant Co2 Insufflation: A Randomized Controlled Trial. J Minim Invasive Gynecol 2018. [DOI: 10.1016/j.jmig.2018.09.599] [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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Sarkar P, New E, Mikhail E, Sappenfield E, Plosker S, Imudia A. The Use of Vaginal Misoprostol Prior to Office Hysteroscopy is Associated with Lower Pain and Tenaculum Utilization During the Procedure. J Minim Invasive Gynecol 2018. [DOI: 10.1016/j.jmig.2018.09.118] [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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New E, Sarkar P, Whynott R, Plosker S, Mikhail E, Imudia A. The Effect of Vaginal Misoprostol on Patient Reported Pain During Successive Office Hysteroscopy and Endometrial Biopsy. J Minim Invasive Gynecol 2018. [DOI: 10.1016/j.jmig.2018.09.348] [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: 10/28/2022]
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Roy A, Sar P, Sarkar J, Dutta A, Sarkar P, Gupta A, Mohapatra B, Pal S, Kazy SK. Petroleum hydrocarbon rich oil refinery sludge of North-East India harbours anaerobic, fermentative, sulfate-reducing, syntrophic and methanogenic microbial populations. BMC Microbiol 2018; 18:151. [PMID: 30348104 PMCID: PMC6198496 DOI: 10.1186/s12866-018-1275-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [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: 03/14/2018] [Accepted: 09/28/2018] [Indexed: 11/29/2022] Open
Abstract
Background Sustainable management of voluminous and hazardous oily sludge produced by petroleum refineries remains a challenging problem worldwide. Characterization of microbial communities of petroleum contaminated sites has been considered as the essential prerequisite for implementation of suitable bioremediation strategies. Three petroleum refinery sludge samples from North Eastern India were analyzed using next-generation sequencing technology to explore the diversity and functional potential of inhabitant microorganisms and scope for their on-site bioremediation. Results All sludge samples were hydrocarbon rich, anaerobic and reduced with sulfate as major anion and several heavy metals. High throughput sequencing of V3-16S rRNA genes from sludge metagenomes revealed dominance of strictly anaerobic, fermentative, thermophilic, sulfate-reducing bacteria affiliated to Coprothermobacter, Fervidobacterium, Treponema, Syntrophus, Thermodesulfovibrio, Anaerolinea, Syntrophobacter, Anaerostipes, Anaerobaculum, etc., which have been well known for hydrocarbon degradation. Relatively higher proportions of archaea were detected by qPCR. Archaeal 16S rRNA gene sequences showed presence of methanogenic Methanobacterium, Methanosaeta, Thermoplasmatales, etc. Detection of known hydrocarbon utilizing aerobic/facultative anaerobic (Mycobacterium, Pseudomonas, Longilinea, Geobacter, etc.), nitrate reducing (Gordonia, Novosphigobium, etc.) and nitrogen fixing (Azovibrio, Rhodobacter, etc.) bacteria suggested niche specific guilds with aerobic, facultative anaerobic and strict anaerobic populations. Phylogenetic Investigation of Communities by Reconstruction of Unobserved States (PICRUSt) predicted putative genetic repertoire of sludge microbiomes and their potential for hydrocarbon degradation; lipid-, nitrogen-, sulfur- and methane- metabolism. Methyl coenzyme M reductase A (mcrA) and dissimilatory sulfite reductase beta-subunit (dsrB) genes phylogeny confirmed methanogenic and sulfate-reducing activities within sludge environment endowed by hydrogenotrophic methanogens and sulfate-reducing Deltaproteobacteria and Firmicutes members. Conclusion Refinery sludge microbiomes were comprised of hydrocarbon degrading, fermentative, sulfate-reducing, syntrophic, nitrogen fixing and methanogenic microorganisms, which were in accordance with the prevailing physicochemical nature of the samples. Analysis of functional biomarker genes ascertained the activities of methanogenic and sulfate-reducing organisms within sludge environment. Overall data provided better insights on microbial diversity and activity in oil contaminated environment, which could be exploited suitably for in situ bioremediation of refinery sludge. Electronic supplementary material The online version of this article (10.1186/s12866-018-1275-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Ajoy Roy
- Department of Biotechnology, National Institute of Technology Durgapur, Durgapur, WB, 713 209, India
| | - Pinaki Sar
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, WB, 721 302, India
| | - Jayeeta Sarkar
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, WB, 721 302, India
| | - Avishek Dutta
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, WB, 721 302, India.,School of Bioscience, Indian Institute of Technology Kharagpur, Kharagpur, WB, 721 302, India
| | - Poulomi Sarkar
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, WB, 721 302, India
| | - Abhishek Gupta
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, WB, 721 302, India
| | - Balaram Mohapatra
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, WB, 721 302, India
| | - Siddhartha Pal
- Department of Biotechnology, National Institute of Technology Durgapur, Durgapur, WB, 713 209, India
| | - Sufia K Kazy
- Department of Biotechnology, National Institute of Technology Durgapur, Durgapur, WB, 713 209, India.
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Constantine S, Roach D, Liberali S, Kiermeier A, Sarkar P, Jannes J, Sambrook P, Anderson P, Beltrame J. Carotid Artery Calcification on Orthopantomograms (CACO Study) - is it indicative of carotid stenosis? Aust Dent J 2018; 64:4-10. [DOI: 10.1111/adj.12651] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/07/2018] [Indexed: 12/14/2022]
Affiliation(s)
- S Constantine
- South Australian Dental Service; The Queen Elizabeth Hospital; Women's and Children's Hospital; Adelaide South Australia Australia
- The University of Adelaide; Adelaide South Australia Australia
| | - D Roach
- The University of Adelaide; Adelaide South Australia Australia
- The Queen Elizabeth Hospital; Adelaide South Australia Australia
| | - S Liberali
- Special Needs Unit; Adelaide Dental Hospital; SA Dental Service; Adelaide South Australia Australia
| | - A Kiermeier
- Statistical Process Improvement Consulting and Training Pty Ltd; Gumeracha South Australia Australia
| | - P Sarkar
- The Queen Elizabeth Hospital; Adelaide South Australia Australia
| | - J Jannes
- Central Adelaide Local Health Network; Adelaide South Australia Australia
- University of Adelaide; Adelaide South Australia Australia
| | - P Sambrook
- SA Dental Service; Head of Unit OMS; Royal Adelaide Hospital; Adelaide South Australia Australia
| | - P Anderson
- Australian Craniofacial Unit; Women's and Children's Hospital; Adelaide South Australia Australia
| | - J Beltrame
- Michell Professor of Medicine; The Queen Elizabeth Hospital; University of Adelaide; Cardiology Academic Lead; Central Adelaide Local Health Network; Adelaide South Australia Australia
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New E, Sarkar P, Whynott R, Plosker S, Mikhail E, Imudia A. The effect of vaginal misoprostol on patient reported pain during successive office hysteroscopy and endometrial biopsy. Fertil Steril 2018. [DOI: 10.1016/j.fertnstert.2018.07.695] [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: 11/27/2022]
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Dubey A, Samanta A, Sarkar P, Karmakar M, Mukherjee A, Loha C, Kumar M, Sahu S, Saxena V, Chatterjee P. Hydrodynamic characteristics in a pilot-scale cold flow model for chemical looping combustion. ADV POWDER TECHNOL 2018. [DOI: 10.1016/j.apt.2018.03.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [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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Hodge G, Hodge S, Nguyen PT, Yeo A, Sarkar P, Badiei A, Holmes‐Liew CL, Reynolds PN, Holmes M. Bronchiolitis obliterans syndrome is associated with increased p-glycoprotein expression and loss of glucocorticoid receptor from steroid-resistant proinflammatory CD8 + T cells. Clin Exp Immunol 2018; 192:242-250. [PMID: 29352737 PMCID: PMC5904702 DOI: 10.1111/cei.13103] [Citation(s) in RCA: 4] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 01/08/2018] [Accepted: 01/09/2018] [Indexed: 12/31/2022] Open
Abstract
Immunosuppressive therapy fails to suppress the production of proinflammatory cytokines, particularly by CD8+ T cells, in stable lung transplant recipients and those undergoing chronic rejection, suggesting that some patients may become relatively resistant to immunosuppressants such as glucocorticoids (GC). We have shown loss of GC receptor (GCR) from the CD8+ cells, and we hypothesized that the drug membrane efflux pump, p-glycoprotein-1 (Pgp), may also be involved in lymphocyte steroid resistance following lung transplant. Pgp/GCR expression and interferon (IFN)-γ/tumour necrosis factor (TNF)-α proinflammatory cytokine production was measured in blood lymphocytes from 15 stable lung transplant patients, 10 patients with bronchiolitis obliterans syndrome (BOS) and 10 healthy aged-matched controls (± prednisolone ± Pgp inhibitor, cyclosporin A ± GCR activator, Compound A) using flow cytometry. Both Pgp+ and Pgp- lymphocyte subsets from all subjects produced IFN-γ/TNF-α proinflammatory cytokines. Pgp expression was increased in CD8+ Pgp+ T cells and correlated with IFN-γ/TNF-α expression and BOS grade. Reduced GCR was observed in CD8+ Pgp- T, natural killer (NK) T-like and NK cells from stable patients compared with controls, and reduced further in CD8+ Pgp- T cells in BOS. The addition of 2·5 ng/ml cyclosporin A and 1 µM prednisolone inhibit IFN-γ/TNF-α production significantly by CD8+ Pgp+ T cells from BOS patients. The addition of 10 µM Compound A and 1 µM prednisolone inhibit IFN-γ/TNF-α production significantly by CD8+ Pgp- T cells from BOS patients. BOS is associated with increased Pgp expression and loss of GCR from steroid-resistant proinflammatory CD8+ T cells. Treatments that inhibit Pgp and up-regulate GCR in CD8+ T cells may improve graft survival.
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Affiliation(s)
- G. Hodge
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
- Department of MedicineUniversity of AdelaideAdelaideSouth Australia
| | - S. Hodge
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
- Department of MedicineUniversity of AdelaideAdelaideSouth Australia
| | - P. T. Nguyen
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
- Department of MedicineUniversity of AdelaideAdelaideSouth Australia
| | - A. Yeo
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
| | - P. Sarkar
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
| | - A. Badiei
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
| | - C. L. Holmes‐Liew
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
- Department of MedicineUniversity of AdelaideAdelaideSouth Australia
- South Australian Lung Transplant ServiceAdelaideSouth Australia
| | - P. N. Reynolds
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
- Department of MedicineUniversity of AdelaideAdelaideSouth Australia
| | - M. Holmes
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
- Department of MedicineUniversity of AdelaideAdelaideSouth Australia
- South Australian Lung Transplant ServiceAdelaideSouth Australia
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Roy A, Dutta A, Pal S, Gupta A, Sarkar J, Chatterjee A, Saha A, Sarkar P, Sar P, Kazy SK. Biostimulation and bioaugmentation of native microbial community accelerated bioremediation of oil refinery sludge. Bioresour Technol 2018; 253:22-32. [PMID: 29328931 DOI: 10.1016/j.biortech.2018.01.004] [Citation(s) in RCA: 122] [Impact Index Per Article: 20.3] [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: 11/15/2017] [Revised: 12/29/2017] [Accepted: 01/01/2018] [Indexed: 06/07/2023]
Abstract
Scope for developing an engineered bioremediation strategy for the treatment of hydrocarbon-rich petroleum refinery waste was investigated through biostimulation and bioaugmentation approaches. Enhanced (46-55%) total petroleum hydrocarbon (TPH) attenuation was achieved through phosphate, nitrate or nitrate+phosphate amendment in the sludge with increased (upto 12%) abundance of fermentative, hydrocarbon degrading, sulfate-reducing, CO2-assimilating and methanogenic microorganisms (Bacillus, Coprothermobacter, Rhodobacter, Pseudomonas, Achromobacter, Desulfitobacter, Desulfosporosinus, T78, Methanobacterium, Methanosaeta, etc). Together with nutrients, bioaugmentation with biosurfactant producing and hydrocarbon utilizing indigenous Bacillus strains resulted in 57-75% TPH reduction. Phylogenetic Investigation of Communities by Reconstruction of Unobserved States (PICRUSt) analysis revealed enhanced gene allocation for transporters (0.45-3.07%), ABC transporters (0.38-2.07%), methane (0.16-1.06%), fatty acid (0.018-0.15%), nitrogen (0.07-0.17%), butanoate (0.06-0.35%), propanoate (0.004-0.26%) metabolism and some xenobiotics (0.007-0.13%) degradation. This study indicated that nutrient-induced community dynamics of native microorganisms and their metabolic interplay within oil refinery sludge could be a driving force behind accelerated bioremediation.
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Affiliation(s)
- Ajoy Roy
- Department of Biotechnology, National Institute of Technology Durgapur, Durgapur 713 209, WB, India
| | - Avishek Dutta
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721 302, WB, India; School of Bio Science, Indian Institute of Technology Kharagpur, Kharagpur 721 302, WB, India
| | - Siddhartha Pal
- Department of Biotechnology, National Institute of Technology Durgapur, Durgapur 713 209, WB, India
| | - Abhishek Gupta
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721 302, WB, India
| | - Jayeeta Sarkar
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721 302, WB, India
| | - Ananya Chatterjee
- Department of Biotechnology, National Institute of Technology Durgapur, Durgapur 713 209, WB, India
| | - Anumeha Saha
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721 302, WB, India
| | - Poulomi Sarkar
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721 302, WB, India
| | - Pinaki Sar
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721 302, WB, India
| | - Sufia K Kazy
- Department of Biotechnology, National Institute of Technology Durgapur, Durgapur 713 209, WB, India.
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Sarkar P, Roy A, Pal S, Mohapatra B, Kazy SK, Maiti MK, Sar P. Enrichment and characterization of hydrocarbon-degrading bacteria from petroleum refinery waste as potent bioaugmentation agent for in situ bioremediation. Bioresour Technol 2017; 242:15-27. [PMID: 28533069 DOI: 10.1016/j.biortech.2017.05.010] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [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: 01/31/2017] [Revised: 04/30/2017] [Accepted: 05/02/2017] [Indexed: 06/07/2023]
Abstract
Intrinsic biodegradation potential of bacteria from petroleum refinery waste was investigated through isolation of cultivable strains and their characterization. Pseudomonas and Bacillus spp. populated the normal cultivable taxa while prolonged enrichment with hydrocarbons and crude oil yielded hydrocarbonoclastic bacteria of genera Burkholderia, Enterobacter, Kocuria, Pandoraea, etc. Strains isolated through enrichment showed assemblages of superior metabolic properties: utilization of aliphatic (C6-C22) and polyaromatic compounds, anaerobic growth with multiple terminal electron acceptors and higher biosurfactant production. Biodegradation of dodecane was studied thoroughly by GC-MS along with detection of gene encoding alkane hydroxylase (alkB). Microcosms bioaugmented with Enterobacter, Pandoraea and Burkholderia strains showed efficient biodegradation (98% TPH removal) well fitted in first order kinetic model with low rate constants and decreased half-life. This study proves that catabolically efficient bacteria resides naturally in complex petroleum refinery wastes and those can be useful for bioaugmentation based bioremediation.
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Affiliation(s)
- Poulomi Sarkar
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Ajoy Roy
- Department of Biotechnology, National Institute of Technology Durgapur, Durgapur 713209, India
| | - Siddhartha Pal
- Department of Biotechnology, National Institute of Technology Durgapur, Durgapur 713209, India
| | - Balaram Mohapatra
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Sufia K Kazy
- Department of Biotechnology, National Institute of Technology Durgapur, Durgapur 713209, India
| | - Mrinal K Maiti
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Pinaki Sar
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
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Sarkar P, Gandhi A, Plosker S, Ying Y, Mayer J, Imudia A. The impact of supraphysiologic estradiol (E2) level during IVF on oocyte / embryo quality and pregnancy outcome. Fertil Steril 2017. [DOI: 10.1016/j.fertnstert.2017.07.1039] [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: 10/18/2022]
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Rupa A, Sarkar P, Rahman M, Shahjadee U, Rahman M, Rahman M. The effect of germination and metallic salts on the stability of enzymes of three high yielding varieties of maize (Zea mays L.) in respect of Bangladesh. Food Res 2017. [DOI: 10.26656/fr.2017.2(1).172] [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: 11/12/2022] Open
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du Plessis J, Cloete R, Burchell L, Sarkar P, Warren RM, Christoffels A, Wigneshweraraj S, Sampson SL. Exploring the potential of T7 bacteriophage protein Gp2 as a novel inhibitor of mycobacterial RNA polymerase. Tuberculosis (Edinb) 2017; 106:82-90. [PMID: 28802409 DOI: 10.1016/j.tube.2017.07.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 02/06/2017] [Revised: 07/04/2017] [Accepted: 07/13/2017] [Indexed: 11/17/2022]
Abstract
Over the past six decades, there has been a decline in novel therapies to treat tuberculosis, while the causative agent of this disease has become increasingly resistant to current treatment regimens. Bacteriophages (phages) are able to kill bacterial cells and understanding this process could lead to novel insights for the treatment of mycobacterial infections. Phages inhibit bacterial gene transcription through phage-encoded proteins which bind to RNA polymerase (RNAP), thereby preventing bacterial transcription. Gp2, a T7 phage protein which binds to the beta prime (β') subunit of RNAP in Escherichia coli, has been well characterized in this regard. Here, we aimed to determine whether Gp2 is able to inhibit RNAP in Mycobacterium tuberculosis as this may provide new possibilities for inhibiting the growth of this deadly pathogen. Results from an electrophoretic mobility shift assay and in vitro transcription assay revealed that Gp2 binds to mycobacterial RNAP and inhibits transcription; however to a much lesser degree than in E. coli. To further understand the molecular basis of these results, a series of in silico techniques were used to assess the interaction between mycobacterial RNAP and Gp2, providing valuable insight into the characteristics of this protein-protein interaction.
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Affiliation(s)
- J du Plessis
- DST/NRF Centre of Excellence for Biomedical Tuberculosis Research, SA MRC Centre for TB Research, Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, South Africa.
| | - R Cloete
- South African National Bioinformatics Institute (SANBI), SA Medical Research Council Bioinformatics Unit, University of the Western Cape, South Africa.
| | - L Burchell
- MRC Centre for Molecular Bacteriology and Infection, Faculty of Medicine, South Kensington Campus, Imperial College, United Kingdom.
| | - P Sarkar
- MRC Centre for Molecular Bacteriology and Infection, Faculty of Medicine, South Kensington Campus, Imperial College, United Kingdom.
| | - R M Warren
- DST/NRF Centre of Excellence for Biomedical Tuberculosis Research, SA MRC Centre for TB Research, Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, South Africa.
| | - A Christoffels
- South African National Bioinformatics Institute (SANBI), SA Medical Research Council Bioinformatics Unit, University of the Western Cape, South Africa.
| | - S Wigneshweraraj
- MRC Centre for Molecular Bacteriology and Infection, Faculty of Medicine, South Kensington Campus, Imperial College, United Kingdom.
| | - S L Sampson
- DST/NRF Centre of Excellence for Biomedical Tuberculosis Research, SA MRC Centre for TB Research, Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, South Africa.
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Khan N, Sarkar P, Midya A, Mandal P, Mohanty PK. Continuously Varying Critical Exponents Beyond Weak Universality. Sci Rep 2017; 7:45004. [PMID: 28327622 PMCID: PMC5361157 DOI: 10.1038/srep45004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Accepted: 02/14/2017] [Indexed: 11/09/2022] Open
Abstract
Renormalization group theory does not restrict the form of continuous variation of critical exponents which occurs in presence of a marginal operator. However, the continuous variation of critical exponents, observed in different contexts, usually follows a weak universality scenario where some of the exponents (e.g., β, γ, ν) vary keeping others (e.g., δ, η) fixed. Here we report ferromagnetic phase transition in (Sm1−yNdy)0.52Sr0.48MnO3 (0.5 ≤ y ≤ 1) single crystals where all three exponents β, γ, δ vary with Nd concentration y. Such a variation clearly violates both universality and weak universality hypothesis. We propose a new scaling theory that explains the present experimental results, reduces to the weak universality as a special case, and provides a generic route leading to continuous variation of critical exponents and multi-criticality.
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Affiliation(s)
- N Khan
- CMP Division, Saha Institute of Nuclear Physics, HBNI, 1/AF Bidhan Nagar, Kolkata 700064, India
| | - P Sarkar
- Department of Physics, Serampore College, Serampore 712201, India
| | - A Midya
- CMP Division, Saha Institute of Nuclear Physics, HBNI, 1/AF Bidhan Nagar, Kolkata 700064, India
| | - P Mandal
- CMP Division, Saha Institute of Nuclear Physics, HBNI, 1/AF Bidhan Nagar, Kolkata 700064, India
| | - P K Mohanty
- CMP Division, Saha Institute of Nuclear Physics, HBNI, 1/AF Bidhan Nagar, Kolkata 700064, India
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Ganguly S, Sarkar P, Chatterjee D, Bandyopadhyay AR. Association of ABO blood group polymorphism and tuberculosis: A study on Bengalee Hindu caste population, West Bengal, India. Indian J Tuberc 2016; 63:242-244. [PMID: 27998496 DOI: 10.1016/j.ijtb.2016.09.014] [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: 04/13/2016] [Accepted: 09/19/2016] [Indexed: 10/20/2022]
Abstract
Tuberculosis (TB) is an infectious disease commonly caused by the bacillus mycobacterium and worldwide estimation demonstrated that more than 8.6 million people are infected by TB. Many of the previous studies reported the association between TB and ABO blood group polymorphism. In this context, the objective of the present study is to understand the association of ABO blood group polymorphism and TB in Bengalee Hindu caste population. The present study consists of 100 clinically diagnosed TB patients and 100 apparently healthy individuals with no previous history of TB from the same population of the same area. The distribution of ABO phenotypes demonstrated significant (p<0.05) excess of AB blood group in TB patients and significant (p<0.05) decrease of O blood group in controls. Logistic regression analysis revealed that individuals with non O blood group have 1.97 times (95% CI 1.04-3.75) greater chance of developing TB than individuals with O blood group.
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Affiliation(s)
- S Ganguly
- Research Student, Department of Anthropology, University College of Science, Technology & Agriculture, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, India
| | - P Sarkar
- UGC (NET), Junior Research Fellow, University College of Science, Technology & Agriculture, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, India
| | - D Chatterjee
- Assistant Professor, Department of Anthropology, University College of Science, Technology & Agriculture, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, India
| | - A R Bandyopadhyay
- Professor, Department of Anthropology, University College of Science, Technology & Agriculture, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, India.
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Sarkar P, Sheikh I, Saha T, Aoun J, Kazi M. Zinc restores altered intestinal ion-transport,barrier functions and counteract inflammatory mediators induced by Shigella infection in T84 cells. Int J Infect Dis 2016. [DOI: 10.1016/j.ijid.2016.02.147] [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: 10/22/2022] Open
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Pandey PK, Kundu AK, Sarkar P, Shukla S. Urethral polyp: An uncommon presentation of rhinosporidiosis. Indian J Dermatol 2014; 59:95-6. [PMID: 24470673 PMCID: PMC3884941 DOI: 10.4103/0019-5154.123521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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36
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Pa J, Ray AN, Sherp P, Majumdar BB, Modak D, Chatterjee S, Sarkar P. Primary cutaneous histoplasmosis simulating Molluscum contagiosum. J Assoc Physicians India 2013; 61:498-500. [PMID: 24772760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Primary cutaneous histoplasmosis in a HIV positive patient ie isolated cutaneous involvement without any deeper structures is a very rare entity. Only a handful cases have been reported worldwide. This patient presented with cutaneous lesion simulating Molluscum but histopathology revealed Histoplasma capsulatum. The patient had no deep organ involvement. The patient was put on Itraconazole which caused rapid dissolution of the lesions. He was subsequently put on HAART and discharged.
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Gorain B, Choudhury H, Halder D, Sarkar A, Sarkar P, Biswas E, Ghosh B, Pal T. A Comparative Pharmacokinetic Study of a Fixed Dose Combination for Essential Hypertensive Patients: A Randomized Crossover Study in Healthy Human Volunteers. Drug Res (Stuttg) 2013. [DOI: 10.1055/s-0033-1343457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- B. Gorain
- Department of Pharmaceutical Technology, Bioequivalence Study Centre, Jadavpur University, Kolkata, India
| | - H. Choudhury
- Department of Pharmaceutical Technology, Bioequivalence Study Centre, Jadavpur University, Kolkata, India
| | - D. Halder
- Department of Pharmaceutical Technology, Bioequivalence Study Centre, Jadavpur University, Kolkata, India
| | - A. Sarkar
- Department of Pharmaceutical Technology, Bioequivalence Study Centre, Jadavpur University, Kolkata, India
| | - P. Sarkar
- Department of Pharmaceutical Technology, Bioequivalence Study Centre, Jadavpur University, Kolkata, India
| | - E. Biswas
- Department of Pharmaceutical Technology, Bioequivalence Study Centre, Jadavpur University, Kolkata, India
| | - B. Ghosh
- Department of Pharmacology, Kolkata Medical College and Hospital, Kolkata, India
| | - T. Pal
- Department of Pharmaceutical Technology, Bioequivalence Study Centre, Jadavpur University, Kolkata, India
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Gorain B, Choudhury H, Halder D, Sarkar AK, Sarkar P, Biswas E, Ghosh B, Pal TK. A comparative pharmacokinetic study of a fixed dose combination for essential hypertensive patients: a randomized crossover study in healthy human volunteers. Drug Res (Stuttg) 2013; 63:177-84. [PMID: 23471702 DOI: 10.1055/s-0033-1334882] [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: 10/27/2022]
Abstract
BACKGROUND This study was aimed to investigate the relative bioavailability of fixed-dose-combination (FDC) product of amlodipine, telmisartan and hydrochlorothiazide with individual marketed products in healthy male volunteers. Control of blood pressure with fixed dose combination of the above drugs acting through different mechanism have a benefit of convenient dosing in terms of compliance, lower the dose and subsequently reduce the side effects. METHODS The authors investigated the relative bioavailability under a fasting state of the 3 drugs in a randomized, open-label, 2-treatment, 2-period, 2-sequence, crossover bioequivalence study with a washout period of 21 days. Plasma concentration of the analytes were assayed in timed samples with a simple, highly sensitive and rapid validated method using HPLC coupled to tandem mass spectrometry that had a lower limit of quantification of 1 ng/mL for all the 3 components. RESULTS Test and reference formulations gave a mean Cmax of 5.234±0.914 ng/mL and 4.991±0.563 ng/mL, 108.839±13.601 ng/mL and 114.783±12.315 ng/mL and 97.814±10.779 ng/mL and 93.731±10.018 ng/mL for amlodipine, telmisartan and hydrochlorothiazide respectively. The AUC0-t of amlodipine, telmisartan and hydrochlorothiazide was 161.484 ng.h/mL, 1 917.644 ng.h/mL and 822.847 ng.h/mL for test formulation and 162.108 ng.h/mL, 2 014.764 ng.h/mL and 829.323 ng.h/mL for reference in the fasting state. CONCLUSION The 90% confidence intervals for the test/reference ratio of the pharmacokinetic parameters in fasting state (mean Cmax, AUC0-t, and AUC0-∞) were within the acceptable range of 80.00-125.00. Thus, these findings clearly indicate that the FDC product is bioequivalent with the individual marketed products in terms of rate and extent of drug absorption and is well tolerated with no significant adverse reactions.
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Affiliation(s)
- B Gorain
- Department of Pharmaceutical Technology, Bioequivalence Study Centre, Jadavpur University, Kolkata, India
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Sarkar P, Zohora F, Jabbar A, Tareq F, Hasan C, Ahsan M. Phytochemical Studies on the Stem Bark of Couroupita guianensis Aubl. ACTA ACUST UNITED AC 2013. [DOI: 10.14233/ajchem.2013.14066] [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: 11/12/2022]
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Banerjee K, Cu Y, Sun Y, Hartog K, Dey A, Brito L, Verma A, Nandi A, Sarkar P, Valiante NM, Geall AJ, Barnett SW, Otten GR. Potency of an HIV-SAM™ vaccine in a heterologous prime-boost vaccination regimen. Retrovirology 2012. [PMCID: PMC3441396 DOI: 10.1186/1742-4690-9-s2-p312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Terashvili M, Sarkar P, Nostrand MV, Falck JR, Harder DR. The protective effect of astrocyte-derived 14,15-epoxyeicosatrienoic acid on hydrogen peroxide-induced cell injury in astrocyte-dopaminergic neuronal cell line co-culture. Neuroscience 2012; 223:68-76. [PMID: 22863680 DOI: 10.1016/j.neuroscience.2012.07.045] [Citation(s) in RCA: 33] [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] [Received: 03/26/2012] [Revised: 07/09/2012] [Accepted: 07/19/2012] [Indexed: 11/25/2022]
Abstract
Astrocytes perform several functions that are essential for normal neuronal activity. They play a critical role in neuronal survival during ischemia and other degenerative injuries and also modulate neuronal recovery by influencing neurite outgrowth. In this study, we investigated the neuroprotective effects of astrocyte-derived 14,15-epoxyeicosatrienoic acid (14,15-EET), metabolite of arachidonic acid by cytochrome P450 epoxygenases (CYP), against oxidative stress induced by hydrogen peroxide (H(2)O(2)). We found that dopaminergic neuronal cells (N27 cell line) stimulated with two different doses of H(2)O(2) (0.1 and 1mM) for 1h showed decreased cell viability compared to the control group, while astrocytes showed less cell death after stimulation with the same doses of H(2)O(2) for 1h. Dopaminergic neuronal cells (N27 cell line) pretreated with different doses of 14,15-EET (0.1-30 μM, 30 min) before H(2)O(2) stimulation also showed increased cell viability. Furthermore, pre-treatment of the co-cultured cells with 12-(3-adamantan-1-yl-ureido)-dodecanoic acid, an inhibitor of the EET metabolizing enzyme, soluble epoxide hydrolase (sEH), before H(2)O(2) stimulation (1mM, for 1h) increased cell viability. It also increased the endogenous level of 14,15-EET in the media compared to control group. However, pretreatment with the CYP epoxygenase inhibitor miconazole (1-20 μM, 1h) before H(2)O(2) (1mM, 1h) stimulation showed decreased cell viability. Our data suggest that 14,15-EET which is released from astrocytes, enhances cell viability against oxidant-induced injury. Further understanding of the mechanism of 14,15-EET-mediated protection in dopaminergic neurons is imperative, as it could lead to novel therapeutic approaches for treating CNS neuropathologies, such as Parkinson's disease.
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Affiliation(s)
- M Terashvili
- Department of Physiology, Cardiovascular Research Center, Medical College of Wisconsin, Milwaukee, WI 53226, United States
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Kumar A, Balaji Y, Kiran H, Sarkar P, Varma V, Prasad N, Tamilmani K. Concurrent Development and Certification of SOFTCOMAG 49AA Alloy for Aeronautical Applications. DEFENCE SCI J 2012. [DOI: 10.14429/dsj.62.1093] [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: 11/13/2022]
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Sarkar P, Narayanan J, Harder DR. Differential effect of amyloid β on the cytochrome P450 epoxygenase activity in rat brain. Neuroscience 2011; 194:241-9. [PMID: 21843605 DOI: 10.1016/j.neuroscience.2011.07.058] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2011] [Revised: 07/19/2011] [Accepted: 07/23/2011] [Indexed: 01/03/2023]
Abstract
One of the prominent features of Alzheimer's disease is the excessive accumulation of the protein amyloid beta (Aβ) in certain areas of the brain leading to neurodegeneration. Aβ is cytotoxic and disrupts several cytoprotective pathways. Recent literature has demonstrated that certain cytochrome P450 (CYP) products are neuroprotective, including epoxide metabolites of arachidonic acid (AA), epoxyeicosatrienoic acids (EETs). The action of Aβ with respect to regionally produced EETs in the brain has yet to be defined. Epoxygenases metabolize AA into four regioisomers of EETs (14,15-, 11,12-, 8,9- and 5,6-EET). EETs are rapidly degraded into dihydroxyeicosatrienoic acids (DiHETEs) by soluble epoxide hydrolase (sEH). To determine the effect of Aβ on the epoxygenase activity in different regions of the brain, microsomes were prepared from the cerebrum and cerebellum of adult Sprague-Dawley rats and incubated with 1 and 10 μM Aβ for 30 min after which epoxygenase activity assay was performed. Mass spectrometry indicated that incubation with Aβ reduced 14,15-EET production by 30% as compared to vehicle in the cerebrum, but not in the cerebellum. When we separated the cerebrum into cortex and hippocampus, significant decrease in the production of total EETs and DiHETEs were seen in presence of Aβ (81% and 74%) in the cortex. Moreover, 11,12-EET production was decreased to ∼70% of vehicle in both cortex and hippocampus. Epoxygenase activity in the cultured astrocytes and neurons also showed reduction in total EET and DiHETE production (to 80% and ∼70% of vehicle respectively) in presence of Aβ. Altogether, our data suggest that Aβ reduces epoxygenase activity differentially in a region-specific and cell-specific manner. The reduction of cytoprotective EETs by Aβ in the cerebrum may make it more prone to degeneration than the cerebellum. Further understanding of these interactions will improve our ability to protect against the pathology of Alzheimer's disease.
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Affiliation(s)
- P Sarkar
- Department of Physiology and Cardiovascular Center, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, USA
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Parashari UC, Khanduri S, Bhadury S, Sarkar P. MRI Manifestation and Early Diagnosis of Bone Infarct: A Rare Complication of Steroid Therapy for Pemphigus. Malays Orthop J 2011. [DOI: 10.5704/moj.1107.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Luchowski R, Matveeva EG, Shtoyko T, Sarkar P, Patsenker LD, Klochko OP, Terpetschnig EA, Borejdo J, Akopova I, Gryczynski Z, Gryczynski I. Single molecule immunoassay on plasmonic platforms. Curr Pharm Biotechnol 2010; 11:96-102. [PMID: 19929821 DOI: 10.2174/138920110790725384] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2009] [Accepted: 09/01/2009] [Indexed: 11/22/2022]
Abstract
We examined the photophysical properties of the new near infrared (NIR) fluorescent label SeTau-665 on a plasmonic platform of self- assembled colloidal structures (SACS) of silver prepared on a semitransparent silver film. A SeTau-665 immunoassay was performed on this platform and a control glass slide. The fluorescence properties of this label substantially change due to plasmonic interactions. While the average brightness increase of SeTau 665 in ensemble measurements was about 70-fold, fluorescence enhancements up to four-hundred times were observed on certain "hot spots" for single molecule measurements. The intensity increase is strongly correlated with a simultaneous decrease in fluorescence lifetime in these "hot spots". The large increase in brightness allows the reduction of the excitation power resulting in a reduced background and increased photostability. The remarkable fluorescence enhancements observed for SeTau 665 on our plasmonic platform should allow to substantially improve single molecule detection and to reduce the detection limits in sensing devices.
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Affiliation(s)
- R Luchowski
- Center for Commercialization of Fluorescence Technologies, Department of Molecular Biology & Immunology, UNTHSC, Fort Worth, TX 76107, USA.
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Ramasami S, Abu-Rajab K, Sarkar P, Baguley S. Audit of hepatitis B vaccination of men who have sex with men attending Scottish genitourinary medicine clinics. Int J STD AIDS 2009; 20:575-6. [PMID: 19625593 DOI: 10.1258/ijsa.2008.008447] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Practice related to hepatitis B vaccination of men who have sex with men (MSM) in Scottish genitourinary medicine clinics was audited against targets based on the offer and completion of vaccination set by the British Association of Sexual Health and HIV. Of 521 cases audited from 11 clinics, 215 (41%) were eligible for vaccination and 175 (81%) of eligible MSM were offered vaccination. Of those, 144 (82%) accepted vaccination. The super-accelerated schedule was most commonly prescribed but only 29% of those starting this schedule completed it, compared with 57% of those receiving the standard course. The overall vaccination completion rate was 31% and 82% of those completing vaccination had antisurface antibodies measured. A more robust recall system and uniformity in vaccination policies addressing the balance of patient compliance and immunogenicity of vaccine schedule are needed to improve completion rates.
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Affiliation(s)
- S Ramasami
- Department of Genitourinary Medicine, Royal Infirmary Edinburgh, UK.
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Nayini K, Vachhani M, Miheso J, Sarkar P. P129 Does provision of dedicated antenatal care improve the obstetric outcome in teenage pregnancy? Int J Gynaecol Obstet 2009. [DOI: 10.1016/s0020-7292(09)61620-9] [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: 10/20/2022]
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Nayini K, Vachhani M, Singh S, Sarkar P. O667 Audit of management referral for ovarian cyst in women (above 50 yrs). Int J Gynaecol Obstet 2009. [DOI: 10.1016/s0020-7292(09)61040-7] [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: 11/16/2022]
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Sarkar P, Mukherjee J, Ghosh A, Bhattacharjee M, Mahato S, Chakraborty A, Mondal M, Banerjee C, Chaudhuri S. A Comparative Analysis of Immunorestoration and Recovery with Conventional and Immunotherapeutic Protocols in Canine Generalized Demodicosis: A Newer Insight of Immunotherapeutic Efficacy of T11TS. Immunol Invest 2009; 33:453-68. [PMID: 15624702 DOI: 10.1081/imm-200038753] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Demodex canis is a natural inhabiting mite of canine skin. Immunological disorder or genetic disorder induces the Demodex population to proliferate vigorously resulting in generalized demodicosis with consequent chronic immunosuppression. Signs of generalized demodicosis include alopecia, crysting, erythema, secondary pyoderma etc. Amitraz, an acaricide, is used conventionally for the treatment of generalized demodicosis. In many instances, the disease relapses due to the residual immunosuppression. The need of an immunorestorative therapy has been urged in generalized demodicosis. Two immunorestorative drugs, namely, Immuplus, a herbal drug, and T11TS, a sheep erythrocyte surface glycoprotein, has been used in two separate groups of dogs having generalized demodicosis and receiving Amitraz treatment. It was observed that though Amitraz treated group responded to the therapy showing increased E-rosettes and nonspecific cytotoxic efficacy of T-lymphocytes and decrease in phagocytic potential of macrophages, the groups treated with the immunotherapeutics like Immuplus and T11TS, responded better. However, the group treated with T11TS showed best recovery. These results emphasize the need for an immunorestorative therapy in generalized demodicosis and provide data in favor of T11TS as a better immunomodulator in comparison to Immuplus.
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Affiliation(s)
- P Sarkar
- Cellular and Molecular Immunology Laboratory, Department of Physiology, Dr. B.C. Roy Post Graduate Institute of Basic Medical Sciences, Institute of Post Graduate Medical Education and Research, 244B, A.J.C. Bose Road, Kolkata 700020, India
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Schmidt M, Schwartzberg AM, Perera PN, Weber-Bargioni A, Carroll A, Sarkar P, Bosneaga E, Urban JJ, Song J, Balakshin MY, Capanema EA, Auer M, Adams PD, Chiang VL, Schuck PJ. Label-free in situ imaging of lignification in the cell wall of low lignin transgenic Populus trichocarpa. Planta 2009; 230:589-97. [PMID: 19526248 PMCID: PMC2715566 DOI: 10.1007/s00425-009-0963-x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [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: 05/01/2009] [Accepted: 05/25/2009] [Indexed: 05/19/2023]
Abstract
Chemical imaging by confocal Raman microscopy has been used for the visualization of the cellulose and lignin distribution in wood cell walls. Lignin reduction in wood can be achieved by, for example, transgenic suppression of a monolignol biosynthesis gene encoding 4-coumarate-CoA ligase (4CL). Here, we use confocal Raman microscopy to compare lignification in wild type and lignin-reduced 4CL transgenic Populus trichocarpa stem wood with spatial resolution that is sub-microm. Analyzing the lignin Raman bands in the spectral region between 1,600 and 1,700 cm(-1), differences in lignin signal intensity and localization are mapped in situ. Transgenic reduction of lignin is particularly pronounced in the S2 wall layer of fibers, suggesting that such transgenic approach may help overcome cell wall recalcitrance to wood saccharification. Spatial heterogeneity in the lignin composition, in particular with regard to ethylenic residues, is observed in both samples.
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Affiliation(s)
- M. Schmidt
- Energy Biosciences Institute, University of California, Berkeley, CA 94720 USA
| | - A. M. Schwartzberg
- Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
| | - P. N. Perera
- Energy Biosciences Institute, University of California, Berkeley, CA 94720 USA
| | - A. Weber-Bargioni
- Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
| | - A. Carroll
- Energy Biosciences Institute, University of California, Berkeley, CA 94720 USA
- Department of Biology, Stanford University, Stanford, CA 94305 USA
| | - P. Sarkar
- Energy Biosciences Institute, University of California, Berkeley, CA 94720 USA
| | - E. Bosneaga
- Energy Biosciences Institute, University of California, Berkeley, CA 94720 USA
| | - J. J. Urban
- Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
| | - J. Song
- Forest Biotechnology Group, Department of Forestry and Environmental Resources, College of Natural Resources, North Carolina State University, Raleigh, NC 27695 USA
- Institute of Medicinal Plant Development, Peking Union Medical College, Chinese Academy of Medical Sciences, Xibeiwang, Haidian District, 100094 Beijing, People’s Republic of China
| | - M. Y. Balakshin
- Forest Biotechnology Group, Department of Forestry and Environmental Resources, College of Natural Resources, North Carolina State University, Raleigh, NC 27695 USA
| | - E. A. Capanema
- Forest Biotechnology Group, Department of Forestry and Environmental Resources, College of Natural Resources, North Carolina State University, Raleigh, NC 27695 USA
| | - M. Auer
- Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
| | - P. D. Adams
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
| | - V. L. Chiang
- Forest Biotechnology Group, Department of Forestry and Environmental Resources, College of Natural Resources, North Carolina State University, Raleigh, NC 27695 USA
| | - P. James Schuck
- Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
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