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Choudhury M, Jyethi DS, Dutta J, Purkayastha SP, Deb D, Das R, Roy G, Sen T, Bhattacharyya KG. Investigation of groundwater and soil quality near to a municipal waste disposal site in Silchar, Assam, India. Int J Energ Water Res 2021. [PMCID: PMC7930903 DOI: 10.1007/s42108-021-00117-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Unscientific management of municipal solid waste is one of the direct sources of contamination in developing countries, such as India. The present investigation carried out during Oct–Dec 2019 attempts to assess the parameters, such as quality of groundwater and soil along three depths (0–5, 5–15 and 15–30 cm), in proximity to a dumping site in Silchar, a rapidly evolving city of North-East India. Standard protocols of soil and water quality assessments were carried out. The pH values of the surface soils were found to be slightly acidic. Decrease in acidity with increasing depth was observed in the study site. The relative abundance of the analyzed elements at all soil depths was Zn > Fe > Ni > Cu > Cr. Weak correlation between the concentration of Cu, Fe and Zn, and the bulk density of the soil highlighted the micronutrient status of the soil. The impact of the nearby dumpsite on trace element contamination is indicated by the ‘extremely contaminated’ status of the soils with respect to geo-accumulation index. Majority of the groundwater samples exhibited pH levels below the desired limits, making it unfit for consumption by local communities. While Fe, Cu and Ni levels in groundwater samples exceeded the guideline values, Cr and Zn concentrations were found to be within limits except one sample. Principal Component Analysis of the observed data was carried out to ascertain the predominant sources of contamination. The observations indicate the negative impacts of nearby dumpsite on environmental parameters, such as groundwater and soil quality, as highlighted in this research.
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Affiliation(s)
- M. Choudhury
- Voice of Environment, Guwahati, 781034 Assam India
| | - D. S. Jyethi
- Indian Statistical Institute, North East Centre, Tezpur, 784028 Assam India
| | - J. Dutta
- Department of Environmental Sciences, Sant Gahira Guru Vishwavidyalaya, Sarguja, Ambikapur, 497001 India
- Commission on Ecosystem Management (CEM), South Asia, IUCN, 110016 New Delhi, India
| | - S. P. Purkayastha
- Department of Chemistry, Karimganj College, Karimganj, 788710 Assam India
| | - D. Deb
- Department of Chemistry, Karimganj College, Karimganj, 788710 Assam India
| | - R. Das
- Department of Chemistry, Karimganj College, Karimganj, 788710 Assam India
| | - G. Roy
- Voice of Environment, Guwahati, 781034 Assam India
- Department of Chemistry, Karimganj College, Karimganj, 788710 Assam India
| | - T. Sen
- Department of Biosciences and Bioengineering (BSBE), Indian Institute of Technology Guwahati, Guwahati, Assam India
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Pramanik S, Dutta J, Chakraborty P. Development of pH-Responsive Interpenetrating Polymer Networks of Polyacrylamide-g-Gum Arabica and Sodium Alginate for Gastroprotective Delivery of Gabapentin. Indian J Pharm Sci 2021. [DOI: 10.36468/pharmaceutical-sciences.796] [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: 11/22/2022] Open
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3
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Agüero B, Mena J, Berrios F, Tapia R, Salinas C, Dutta J, van Bakel H, Mor SK, Brito B, Medina RA, Neira V. First report of porcine respirovirus 1 in South America. Vet Microbiol 2020; 246:108726. [PMID: 32605754 PMCID: PMC10898806 DOI: 10.1016/j.vetmic.2020.108726] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [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: 03/01/2020] [Revised: 05/05/2020] [Accepted: 05/13/2020] [Indexed: 10/24/2022]
Abstract
Porcine respirovirus 1 (PRV1) is an emerging virus in pigs that has been previously described in the USA and China. There are no reports of its presence in the rest of the world. The objective of this study was to determine the occurrence of PRV1 in Chile and to determine its phylogeny. Thus, we collected samples (oral fluids, nasal swabs, and lungs) from a swine influenza A virus (IAV) surveillance program, most of which belonged to pigs with respiratory disease. The samples were analyzed by RT-PCR, and the viral sequencing was obtained using RNA whole-genome sequencing approach. Maximum likelihood phylogeny was constructed with the available references. Thirty-one of 164 samples (18.9 %) were RT-PCR positive for PRV1: 62.5 % oral fluids, 19.0 % nasal swabs, and 8.6 % lungs. All 6 farms in this study had at least one positive sample, with 6-40 % of positive results per farm, which suggests that PRV1 is disseminated in Chilean swine farms. Twenty-one of 31 (677%) PRV1-positive samples were also positive for IAV, so the role of PRV1 as secondary pathogen in respiratory disease needs to be further evaluated. Near to complete genome of two PRV1s were obtained from two farms. The phylogenies, in general, showed low bootstrap support, except the concatenated genome and the L gene trees which showed clustering of the Chilean PRV1 with Asian sequences, suggesting a close genetic relationship. This is the first report of PRV1 in the Southern Hemisphere. Further studies are necessary to determine the genetic diversity of this virus in Chile.
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Affiliation(s)
- B Agüero
- Departamento de Medicina Preventiva Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago, Chile
| | - J Mena
- Departamento de Medicina Preventiva Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago, Chile
| | - F Berrios
- Departamento de Medicina Preventiva Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago, Chile
| | - R Tapia
- Departamento de Medicina Preventiva Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago, Chile
| | - C Salinas
- Departamento de Medicina Preventiva Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago, Chile
| | - J Dutta
- Department of Genetics and Genomic Sciences, Institute for Data Science and Genomic Technology, Icahn School of Medicine at Mount Sinai, New York City, NY, USA
| | - H van Bakel
- Department of Genetics and Genomic Sciences, Institute for Data Science and Genomic Technology, Icahn School of Medicine at Mount Sinai, New York City, NY, USA
| | - S K Mor
- College of Veterinary Medicine, University of Minnesota, MN, USA
| | - B Brito
- The ithree institute, University of Technology Sydney, PO Box 123, Broadway, NSW 2077, Australia
| | - R A Medina
- Departamento de Enfermedades Infecciosas e Inmunología Pediátrica, Escuela de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile; Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York City, NY, USA
| | - V Neira
- Departamento de Medicina Preventiva Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago, Chile.
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Yohai L, Giraldo Mejía H, Procaccini R, Pellice S, Laxman Kunjali K, Dutta J, Uheida A. Nanocomposite functionalized membranes based on silica nanoparticles cross-linked to electrospun nanofibrous support for arsenic(v) adsorption from contaminated underground water. RSC Adv 2019; 9:8280-8289. [PMID: 35518691 PMCID: PMC9061270 DOI: 10.1039/c8ra09866b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [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: 11/30/2018] [Accepted: 02/25/2019] [Indexed: 11/21/2022] Open
Abstract
Nanocomposite functionalized membranes were synthesized using surface functionalized mesoporous silica nanoparticles (MCM-NH2 or MCM-PEI) cross-linked to a modified polyacrylonitrile (mPAN) nanofibrous substrate for the removal of 1 mg L−1 of As(v); a concentration much higher than what has been reported for underground water in Argentina. Adsorption studies were carried out in batch mode at pH 8 with nanoparticles in colloidal form, as well as the nanoparticles supported on the modified PAN membranes (mPAN/MCM-NH2 and mPAN/MCM-PEI). Results indicate a twenty-fold improvement in As(v) adsorption with supported nanoparticles (nanocomposite membranes) as opposed to their colloidal form. The adsorption efficiency could be further enhanced by modifying the nanocomposite membrane surface with Fe3+ (mPAN/MCM-NH2-Fe3+ and mPAN/MCM-PEI-Fe3+) which resulted in more than 95% arsenic being removed within the first 15 minutes and a specific arsenic adsorption capacity of 4.61 mg g−1 and 5.89 mg g−1 for mPAN/MCM-NH2-Fe3+ and mPAN/MCM-PEI-Fe3+ nanocomposite membranes, respectively. The adsorption characteristics were observed to follow a pseudo-first order behavior. The results suggest that the synthesized materials are excellent for quick and efficient reduction of As(v) concentrations below the WHO guidelines and show promise for future applications. Development of nanocomposite functionalized membranes for the removal of As(v) from contaminated water.![]()
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Affiliation(s)
- L. Yohai
- División Cerámicos
- INTEMA
- CONICET
- UNMdP
- B7608FDQ Mar del Plata
| | | | - R. Procaccini
- División Cerámicos
- INTEMA
- CONICET
- UNMdP
- B7608FDQ Mar del Plata
| | - S. Pellice
- División Cerámicos
- INTEMA
- CONICET
- UNMdP
- B7608FDQ Mar del Plata
| | - K. Laxman Kunjali
- Functional Materials Group
- Department of Applied Physics
- KTH Royal Institute of Technology
- Stockholm
- Sweden
| | - J. Dutta
- Functional Materials Group
- Department of Applied Physics
- KTH Royal Institute of Technology
- Stockholm
- Sweden
| | - A. Uheida
- Functional Materials Group
- Department of Applied Physics
- KTH Royal Institute of Technology
- Stockholm
- Sweden
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Dasgupta A, Ade V, Dutta J, Dasgupta G. Inflammatory phenotypes of severe asthma in India. Lung India 2019. [DOI: 10.4103/0970-2113.257699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Groll A, Kim K, Bhatia H, Zhang JC, Wang JH, Shen ZM, Cai L, Dutta J, Li Q, Meng LJ. Hybrid Pixel-Waveform (HPWF) Enabled CdTe Detectors for Small Animal Gamma-Ray Imaging Applications. IEEE Trans Radiat Plasma Med Sci 2017; 1:3-14. [PMID: 28516169 PMCID: PMC5431752 DOI: 10.1109/tns.2016.2623807] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
This paper presents the design and preliminary evaluation of small-pixel CdTe gamma ray detectors equipped with a hybrid pixel-waveform (HPWF) readout system for gamma ray imaging applications with additional discussion on CZT due to its similarity. The HPWF readout system utilizes a pixelated anode readout circuitry which is designed to only provide the pixel address. This readout circuitry works in coincidence with a high-speed digitizer to sample the cathode waveform which provides the energy, timing, and depth-of-interaction (DOI) information. This work focuses on the developed and experimentally evaluated prototype HPWF-CdTe detectors with a custom CMOS pixel-ASIC to readout small anode pixels of 350 μm in size, and a discrete waveform sampling circuitry to digitize the signal waveform induced on the large cathode. The intrinsic timing, energy, and spatial resolution were experimentally evaluated in this paper in conjunction with methods for depth of interaction (DOI) partitioning of the CdTe crystal. While the experimental studies discussed in this paper are primarily for evaluating HPWF detectors for small animal PET imaging, these detectors could find their applications for ultrahigh-resolution SPECT and other imaging modalities.
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Affiliation(s)
- A Groll
- Nuclear, Plasma, and Radiological Engineering, University of Illinois at Urbana-Champaign, IL 61801 USA (primary: )
| | - K Kim
- Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114 USA
| | - H Bhatia
- Nuclear, Plasma, and Radiological Engineering, University of Illinois at Urbana-Champaign, IL 61801 USA
| | - J C Zhang
- Nuclear, Plasma, and Radiological Engineering, University of Illinois at Urbana-Champaign, IL 61801 USA
| | - J H Wang
- Nuclear, Plasma, and Radiological Engineering, University of Illinois at Urbana-Champaign, IL 61801 USA
| | - Z M Shen
- Nuclear, Plasma, and Radiological Engineering, University of Illinois at Urbana-Champaign, IL 61801 USA
| | - L Cai
- Nuclear, Plasma, and Radiological Engineering, University of Illinois at Urbana-Champaign, IL 61801 USA
| | - J Dutta
- Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114 USA
| | - Q Li
- Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114 USA
| | - L J Meng
- Nuclear, Plasma, and Radiological Engineering, University of Illinois at Urbana-Champaign, IL 61801 USA
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Azumah R, Dutta J, Somboro A, Ramtahal M, Chonco L, Parboosing R, Bester L, Kruger H, Naicker T, Essack S, Govender T. In vitro
evaluation of metal chelators as potential metallo- β -lactamase inhibitors. J Appl Microbiol 2016; 120:860-7. [DOI: 10.1111/jam.13085] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Revised: 01/15/2016] [Accepted: 01/26/2016] [Indexed: 01/16/2023]
Affiliation(s)
- R. Azumah
- Catalysis and Peptide Research Unit; School of Health Sciences; University of Kwa-Zulu Natal; Durban South Africa
- Antimicrobial Research Unit; School of Health Sciences; University of Kwa-Zulu Natal; Durban South Africa
| | - J. Dutta
- Catalysis and Peptide Research Unit; School of Health Sciences; University of Kwa-Zulu Natal; Durban South Africa
| | - A.M. Somboro
- Catalysis and Peptide Research Unit; School of Health Sciences; University of Kwa-Zulu Natal; Durban South Africa
- Antimicrobial Research Unit; School of Health Sciences; University of Kwa-Zulu Natal; Durban South Africa
| | - M. Ramtahal
- Catalysis and Peptide Research Unit; School of Health Sciences; University of Kwa-Zulu Natal; Durban South Africa
- Antimicrobial Research Unit; School of Health Sciences; University of Kwa-Zulu Natal; Durban South Africa
| | - L. Chonco
- Department of Virology; National Health Laboratory Service; University of KwaZulu-Natal; Durban South Africa
| | - R. Parboosing
- Department of Virology; National Health Laboratory Service; University of KwaZulu-Natal; Durban South Africa
| | - L.A. Bester
- Biomedical Resource Unit; University of Kwa-Zulu Natal; Durban South Africa
| | - H.G. Kruger
- Catalysis and Peptide Research Unit; School of Health Sciences; University of Kwa-Zulu Natal; Durban South Africa
| | - T. Naicker
- Catalysis and Peptide Research Unit; School of Health Sciences; University of Kwa-Zulu Natal; Durban South Africa
| | - S.Y. Essack
- Antimicrobial Research Unit; School of Health Sciences; University of Kwa-Zulu Natal; Durban South Africa
| | - T. Govender
- Catalysis and Peptide Research Unit; School of Health Sciences; University of Kwa-Zulu Natal; Durban South Africa
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Abstract
Tea [Camellia sinensis (L.) O. Kuntze] is an economically important non-alcoholic caffeine-containing beverage crop widely cultivated for leaves in India, especially in the Darjeeling district of West Bengal. In May 2012, distinct blight symptoms were observed on leaves of popular tea cultivars AV-2, Tukdah 78, Rungli Rungliot 17/144, and Bannockburn 157 in commercial tea estates of the Darjeeling district. This disease reduces yield and quality of the leaves. The initial symptoms were frequently observed on the young leaf margins and apices. Foliar symptoms are characterized by grayish to brown, semicircular or irregular shaped lesions, often surrounded by pale yellow zones up to 9 mm in diameter. The lesions later expand and the affected leaves turn grayish to dark brown and eventually the dried tissue falls, leading to complete defoliation of the plant. The disease causes damage to leaves of all ages and is severe in young leaves. A portion of the symptomatic leaf tissues were surface sterilized in 70% ethanol for 30 s, then in 2% NaClO for 3 min, rinsed three times in sterile distilled water, and plated onto potato dextrose agar (PDA). The fungal colonies were initially white and then became grayish to brown with sporulation. Conidia were spherical to sub spherical, single-celled, black, 19 to 21 μm in diameter, and were borne on a hyaline vesicle at the tip of each conidiophore. Morphological characteristics of the isolates were concurring to those of Nigrospora sphaerica (1). Moreover, the internal transcribed spacer (ITS) region of the ribosomal RNA was amplified by using primers ITS1 and ITS4 and sequenced (GenBank Accession No. KJ767520). The sequence was compared to the GenBank database through nucleotide BLAST search and the isolate showed 100% similarity to N. sphaerica (KC519729.1). On the basis of morphological characteristics and nucleotide homology, the isolate was identified as N. sphaerica. Koch's postulates were fulfilled in the laboratory on tea leaves inoculated with N. sphaerica conidial suspension (106 conidia ml-1) collected from a 7-day-old culture on PDA. Six inoculated 8-month-old seedlings of tea cultivars AV-2 and S.3/3 were incubated in a controlled environment chamber at 25°C and 80 to 85% humidity with a 12-h photoperiod. In addition, three plants of each cultivar were sprayed with sterile distilled water to serve as controls. Twelve to 14 days after inoculation, inoculated leaves developed blight symptoms similar to those observed on naturally infected tea leaves in the field. No symptoms were observed on the control leaves. The pathogen was re-isolated from lesions and its identity was confirmed by morphological characteristics. It was reported that N. sphaerica is frequently encountered as a secondary invader or as a saprophyte on many plant species and also as a causative organism of foliar disease on several hosts worldwide (2,3). To our knowledge, this is first report of N. sphaerica as a foliar pathogen of Camellia sinensis in Darjeeling, West Bengal, India, or worldwide. References: (1) M. B. Ellis. Dematiaceous Hyphomycetes. CMI, Kew, Surrey, UK, 1971. (2) D. F. Farr and A. Y. Rossman. Fungal Databases, Syst. Mycol. Microbiol. Lab., ARS, USDA. Retrieved from http://nt.ars-grin.gov/fungaldatabases/ July 01, 2013. (3) E. R. Wright et al. Plant Dis. 92:171, 2008.
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Affiliation(s)
- J Dutta
- Life Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati-35, Assam, India
| | - S Gupta
- Life Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati-35, Assam, India
| | - D Thakur
- Life Sciences Division, Institute of Advanced Study in Science and Technology, Paschim Boragaon, Garchuk, Guwahati-35, Assam, India
| | - P J Handique
- Department of Biotechnology, Gauhati University, Guwahati-14, Assam, India
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Abstract
Visible light photocatalytic activity of the plasmonic gold–zinc oxide (Au–ZnO) nanorods (NRs) is investigated with respect to the surface defects of the ZnO NRs, controlled by annealing the NRs in ambient at different temperatures.
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Affiliation(s)
- T. Bora
- Chair in Nanotechnology
- Water Research Center
- Sultan Qaboos University
- Al Khoud – 123
- Oman
| | - M. T. Z. Myint
- Chair in Nanotechnology
- Water Research Center
- Sultan Qaboos University
- Al Khoud – 123
- Oman
| | - S. H. Al-Harthi
- Department of Physics
- College of Science
- Sultan Qaboos University
- Al Khoud – 123
- Oman
| | - J. Dutta
- Chair in Nanotechnology
- Water Research Center
- Sultan Qaboos University
- Al Khoud – 123
- Oman
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Altman DR, Sebra R, Hand J, Attie O, Deikus G, Carpini KWD, Patel G, Rana M, Arvelakis A, Grewal P, Dutta J, Rose H, Shopsin B, Daefler S, Schadt E, Kasarskis A, van Bakel H, Bashir A, Huprikar S. Transmission of methicillin-resistant Staphylococcus aureus via deceased donor liver transplantation confirmed by whole genome sequencing. Am J Transplant 2014; 14:2640-4. [PMID: 25250641 PMCID: PMC4651443 DOI: 10.1111/ajt.12897] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Revised: 04/17/2014] [Accepted: 05/05/2014] [Indexed: 01/25/2023]
Abstract
Donor-derived bacterial infection is a recognized complication of solid organ transplantation (SOT). The present report describes the clinical details and successful outcome in a liver transplant recipient despite transmission of methicillin-resistant Staphylococcus aureus (MRSA) from a deceased donor with MRSA endocarditis and bacteremia. We further describe whole genome sequencing (WGS) and complete de novo assembly of the donor and recipient MRSA isolate genomes, which confirms that both isolates are genetically 100% identical. We propose that similar application of WGS techniques to future investigations of donor bacterial transmission would strengthen the definition of proven bacterial transmission in SOT, particularly in the presence of highly clonal bacteria such as MRSA. WGS will further improve our understanding of the epidemiology of bacterial transmission in SOT and the risk of adverse patient outcomes when it occurs.
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Affiliation(s)
- D. R. Altman
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine, New York, NY
| | - R. Sebra
- Institute and Department of Genetics and Genomic Sciences, Icahn School of Medicine, New York, NY
| | - J. Hand
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine, New York, NY
| | - O. Attie
- Institute and Department of Genetics and Genomic Sciences, Icahn School of Medicine, New York, NY
| | - G. Deikus
- Institute and Department of Genetics and Genomic Sciences, Icahn School of Medicine, New York, NY
| | | | - G. Patel
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine, New York, NY
| | - M. Rana
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine, New York, NY
| | - A. Arvelakis
- Recanati-Miller Transplant Institute, Icahn School of Medicine, New York, NY
| | - P. Grewal
- Recanati-Miller Transplant Institute, Icahn School of Medicine, New York, NY
| | - J. Dutta
- Institute and Department of Genetics and Genomic Sciences, Icahn School of Medicine, New York, NY
| | - H. Rose
- Division of Infectious Diseases, Department of Medicine, NYU School of Medicine, New York, NY
| | - B. Shopsin
- Division of Infectious Diseases, Department of Medicine, NYU School of Medicine, New York, NY
| | - S. Daefler
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine, New York, NY
| | - E. Schadt
- Institute and Department of Genetics and Genomic Sciences, Icahn School of Medicine, New York, NY
| | - A. Kasarskis
- Institute and Department of Genetics and Genomic Sciences, Icahn School of Medicine, New York, NY
| | - H. van Bakel
- Institute and Department of Genetics and Genomic Sciences, Icahn School of Medicine, New York, NY
| | - A. Bashir
- Institute and Department of Genetics and Genomic Sciences, Icahn School of Medicine, New York, NY
| | - S. Huprikar
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine, New York, NY,Corresponding author: Shirish Huprikar,
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Fallah H, Chaudhari M, Bora T, Harun SW, Mohammed WS, Dutta J. Demonstration of side coupling to cladding modes through zinc oxide nanorods grown on multimode optical fiber. Opt Lett 2013; 38:3620-3622. [PMID: 24104829 DOI: 10.1364/ol.38.003620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A novel concept is introduced that utilizes the scattering properties of zinc oxide nanorods to control light guidance and leakage inside optical fibers coated with nanorods. The effect of the hydrothermal growth conditions of the nanorods on light scattering and coupling to optical fiber are experimentally investigated. At optimum conditions, 5% of the incident light is side coupled to the cladding modes. This coupling scheme could be used in different applications such as distributed sensors and light combing. Implementation of the nanorods on fiber provides low cost and controllable nonlithography-based solutions for free space to fiber coupling. Higher coupling efficiencies can be achieved with further optimization.
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Mukhopadhyay S, Dutta J, Raut R, Datta H, Bhattacharyay AK. Expression of oxidative stress in metastatic retinoblastoma- a comparative study. Nepal J Ophthalmol 2013; 4:271-6. [PMID: 22864033 DOI: 10.3126/nepjoph.v4i2.6543] [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: 11/18/2022] Open
Abstract
OBJECTIVE To compare oxidative stress between primary retinoblastoma and retinoblastoma with distant metastasis. PATIENTS AND METHODS Forty consecutive patients presented with primary retinoblastoma and the same number of patients presented with distant metastasis, attending the outpatient department of our hospital between August 2002 and April 2005. All the patients with retinoblastoma underwent a standard metastasis workup and were subsequently categorized into two groups (without metastasis and with metastasis).Venous blood samples were drawn from each patient. After proper centrifugation, serum was collected and antioxidant enzymes and reactive oxygen species (ROS) were assayed. MAIN OUTCOME MEASURES Serum collected from the patients was subjected to biochemical assay of the antioxidant enzymes (superoxide dismutase, catalase and peroxidise) and ROS to determine any difference in enzyme activity between the two groups. RESULTS Antioxidant levels were found to be less in the metastasis group as compared to the primary intraocular retinoblastoma group(p less than 0.05).Mean ROS activity was found to be increased in metastatic group (p less than 0.05). CONCLUSION The decreased antioxidant enzymes level along with increased ROS activity in patients with metastatic retinoblastoma reflect increased oxidative stress as compared to primary intraocular retinoblastoma patients.
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Mukhopadhyay S, Thakur SKD, Dutta J, Prakash R, Shaw C, Gangopadhyay DN, Dutta H, Bhaduri G. Effect of mitomycin C-aided trabeculectomy on conjunctival goblet cell density. Nepal J Ophthalmol 2013; 4:68-72. [PMID: 22344000 DOI: 10.3126/nepjoph.v4i1.5854] [Citation(s) in RCA: 3] [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] Open
Abstract
INTRODUCTION Mitomycin C is gaining widespread popularity as an adjunctive with trabeculectomy, as it significantly increases the success rate of the procedure. But it is associated with serious sight-threatening complications. MATERIALS AND METHODS Twenty eyes planned for trabeculectomy from the glaucoma clinic were enrolled for the study after obtaining an informed consent. The baseline impression cytology was taken. Ten eyes underwent trabeculectomy with mitomycin C (Group A) and the rest underwent trabeculectomy without any antimetabolites (Group B). Impression cytology samples were taken on months 1, 3, 6, 9 and 12. RESULTS In Group A, the difference between goblet cell density preoperatively and 12 month postoperatively was statistically significant (p less than 0.0001). In Group B, the difference was not statistically significant. (p = 0.27). CONCLUSION Mitomycin C, though used to augment the success rate of trabeculectomy, has deleterious effect on the conjunctival goblet cell population as is evident from the conjunctival impression cytology.
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Affiliation(s)
- S Mukhopadhyay
- Regional Institute of Ophthalmology, School of Tropical Medicine and Hygiene, Kolkata, India
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Dutta J, Tripathi S, Dutta P. Progress in antimicrobial activities of chitin, chitosan and its oligosaccharides: a systematic study needs for food applications. FOOD SCI TECHNOL INT 2011; 18:3-34. [DOI: 10.1177/1082013211399195] [Citation(s) in RCA: 116] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In recent years, active biomolecules such as chitosan and its derivatives are undergoing a significant and very fast development in food application area. Due to recent outbreaks of contaminations associated with food products, there have been growing concerns regarding the negative environmental impact of packaging materials of antimicrobial biofilms, which have been studied. Chitosan has a great potential for a wide range of applications due to its biodegradability, biocompatibility, antimicrobial activity, nontoxicity and versatile chemical and physical properties. It can be formed into fibers, films, gels, sponges, beads or nanoparticles. Chitosan films have been used as a packaging material for the quality preservation of a variety of foods. Chitosan has high antimicrobial activities against a wide variety of pathogenic and spoilage microorganisms, including fungi, and Gram-positive and Gram-negative bacteria. A tremendous effort has been made over the past decade to develop and test films with antimicrobial properties to improve food safety and shelf-life. This review highlights the preparation, mechanism, antimicrobial activity, optimization of biocide properties of chitosan films and applications including biocatalysts for the improvement of quality and shelf-life of foods.
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Affiliation(s)
- J. Dutta
- Department of Chemistry, Disha Institute of Management and Technology, Raipur 400701, India
| | - S. Tripathi
- Department of Chemistry, Motilal Nehru National Institute of Technology, Allahabad 211004, India
| | - P.K. Dutta
- Department of Chemistry, Motilal Nehru National Institute of Technology, Allahabad 211004, India
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Vacassy R, Scholz SM, Dutta J, Hofmann H, Plummer CJG, Carrot G, Hilborn J, Akinc M. Nanostructured zinc sulphide phosphors. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-501-369] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTZinc sulphide (ZnS) particles are efficient phosphors for application in flat-panel displays. Spherical ZnS particles were prepared by precipitation from a homogeneous solution. Nanoparticles of 20 to 40 nm having a very narrow size distribution could be synthesized by using complexing chelates such as acetate and acetylacetonate. Complexing of the precipitating cation with the anions present in the system lead to a limited concentration of free cations in the solution. This strongly influences the kinetics of the primary particle agglomeration/growth, resulting in nanometer-sized ZnS particles. Nanostructured ZnS synthesized in this way are polycrystalline particles composed of crystallites of 5–10 nm. The synthesis of very small, non-agglomerated, nanocrystalline particles in the 5–10 nm size range was also possible, making use of a strong complexing ligand (thioglycerol) during the synthesis. The synthesis of controlled monosized ZnS particles will be presented and discussed. The photoluminescence characteristics of ZnS make this material a suitable candidate as phosphor for application in low voltage display technology. The effect of Mn2+ doping on the luminescence characteristics of ZnS will also be discussed.
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Abstract
ABSTRACTSnO2 nanoparticles are of interest for gas sensor applications because the surface area is much larger compared to conventional powders. Thus, interactions between the material and the gases, which occur on the surface sites of the particles, are increased considerably. The preparation of SnO2 powders has been investigated following two forced precipitation systems: the hydrolysis reaction of SnC14 in an emulsion media and the hydrolysis reaction of Sn2+ in the presence of a complexing ligand (CH3COO−). Spherical nanoparticles in the 10 to 100 nm range and with a narrow size distribution were synthesized by both precipitating routes. In both cases, it has been demonstrated that the most important parameter which controlled the particle size was the nature of the associated anion. When this associated anion or ligand is able to form a strong complex with the colloidal subunits, a barrier against Van der Waals attraction is created which results in little growth. This greatly influences the agglomeration/growth kinetics during the precipitation. The effect of acetate chelating ligands which resulted in the SnO2 nano-powders formed of 5–10 nm crystallites will be presented and discussed. Preliminary results on the gas (N2, NO) adsorption studies on pellets formed from these powders are also presented.
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Joshi AA, Chaudhari AJ, Li C, Shattuck DW, Dutta J, Leahy RM, Toga AW. POSTURE MATCHING AND ELASTIC REGISTRATION OF A MOUSE ATLAS TO SURFACE TOPOGRAPHY RANGE DATA. Proc IEEE Int Symp Biomed Imaging 2009; 2009:366-369. [PMID: 21072317 DOI: 10.1109/isbi.2009.5193060] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Estimation of internal mouse anatomy is required for quantitative bioluminescence or fluorescence tomography. However, only surface range data can be recovered from all-optical systems. These data are at times sparse or incomplete. We present a method for fitting an elastically deformable mouse atlas to surface topographic range data acquired by an optical system. In this method, we first match the postures of a deformable atlas and the range data of the mouse being imaged. This is achieved by aligning manually identified landmarks. We then minimize the asymmetric L(2) pseudo-distance between the surface of the deformable atlas and the surface topography range data. Once this registration is accomplished, the internal anatomy of the atlas is transformed to the coordinate system of the range data using elastic energy minimization. We evaluated our method by using it to register a digital mouse atlas to a surface model produced from a manually labeled CT mouse data set. Dice coefficents indicated excellent agreement in the brain and heart, with fair agreement in the kidneys and bladder. We also present example results produced using our method to align the digital mouse atlas to surface range data.
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Affiliation(s)
- A A Joshi
- Laboratory of Neuro Imaging, UCLA School of Medicine, Los Angeles, CA 90095, USA
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Singh J, Dutta P, Dutta J, Hunt A, Macquarrie D, Clark J. Preparation and properties of highly soluble chitosan–l-glutamic acid aerogel derivative. Carbohydr Polym 2009. [DOI: 10.1016/j.carbpol.2008.10.011] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Launen LA, Dutta J, Turpeinen R, Eastep ME, Dorn R, Buggs VH, Leonard JW, Häggblom MM. Characterization of the indigenous PAH-degrading bacteria of Spartina dominated salt marshes in the New York/New Jersey Harbor. Biodegradation 2007; 19:347-63. [PMID: 17636392 DOI: 10.1007/s10532-007-9141-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2006] [Accepted: 06/22/2007] [Indexed: 11/30/2022]
Abstract
The aerobic polyaromatic hydrocarbon (PAH) degrading microbial communities of two petroleum-impacted Spartina-dominated salt marshes in the New York/New Jersey Harbor were examined using a combination of microbiological, molecular and chemical techniques. Microbial isolation studies resulted in the identification of 48 aromatic hydrocarbon-degrading bacterial strains from both vegetated and non-vegetated marsh sediments. The majority of the isolates were from the genera Paenibacillus and Pseudomonas. Radiotracer studies using (14)C-phenanthrene and (14)C-pyrene were used to measure the PAH-mineralization activity in salt marsh sediments. The results suggested a trend towards increased PAH mineralization in vegetated sediments relative to non-vegetated sediments. This trend was supported by the enumeration of PAH-degrading bacteria in non-vegetated and vegetated sediment using a Most Probable Numbers (MPN) technique, which demonstrated that PAH-degrading bacteria existed in non-vegetated and vegetated sediments at levels ranging from 10(2 )to 10(5 )cells/g sediment respectively. No difference between microbial communities present in vegetated versus non-vegetated sediments was found using terminal restriction fragment length polymorphism (of the 16S rRNA gene) or phospholipid fatty acid analysis. These studies provide information on the specific members and activity of the PAH-degrading aerobic bacterial communities present in Spartina-dominated salt marshes in the New York/New Jersey Harbor estuary.
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Affiliation(s)
- L A Launen
- Department of Biochemistry and Microbiology, Biotechnology Center for Agriculture and the Environment, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901-8525, USA.
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Tilak R, Dutta J, Gupta KKD. Prospects for the use of ornamental fishes for mosquito control: a laboratory investigation. Indian J Public Health 2007; 51:54-55. [PMID: 18232145] [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: 05/25/2023] Open
Abstract
Use of larvivorous fishes Gambusia and Poecilia for mosquito control has been a well established option. The study evaluated the larvivorous potential of some ornamental fish vis-a-vis Gambusia and Poecilia in the laboratory settings using standard testing protocol. Gold fish and Blue Gourami were found to be as effective larvivores as Gambusia affinis, the mosquito fish. The study recommends introduction of Goldfish and Blue Gourami in ornamental tanks for control of mosquito breeding as well as providing aesthetic beauty.
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Affiliation(s)
- R Tilak
- Department of PSM, AFMC, Pune.
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Abstract
The nuclear factor-kappaB (NF-kappaB) transcription factors have emerged as major regulators of programmed cell death (PCD) whether via apoptosis or necrosis. In this context, NF-kappaB's activity has important ramifications for normal tissue development, homoeostasis and the physiological functions of various cell systems including the immune, hepatic, epidermal and nervous systems. However, improper regulation of PCD by NF-kappaB can have severe pathologic consequences, ranging from neurodegeneration to cancer, where its activity often precludes effective therapy. Although NF-kappaB generally protects cells by inducing the expression genes encoding antiapoptotic and antioxidizing proteins, its role in apoptosis and necrosis can vary markedly in different cell contexts, and NF-kappaB can sensitize cells to death-inducing stimuli in some instances. This article describes our current knowledge of the role of NF-kappaB in apoptosis and necrosis, and focuses on the many advances since we last reviewed this rapidly evolving topic in Oncogene 3 years ago. There has been substantial progress in understanding NF-kappaB's mode of action in apoptosis and necrosis and the mechanisms that regulate its anti- vs proapoptotic activities. These recent developments shed new light on the role of NF-kappaB in many disease conditions including tumor development, tumor progression and anticancer treatment.
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Affiliation(s)
- J Dutta
- Center for Advanced Biotechnology and Medicine, Robert Wood Johnson Medical School, University of Medicine and Dentistry of New Jersey, Piscataway, NJ, USA
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Tilak R, Agrawal VK, Dutta J. Field performance of cyphenothrin: an integrated insecticide strategy against German cockroaches (Dictyoptera: Blatellidae). J Vector Borne Dis 2005; 42:68-73. [PMID: 16161703] [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: 05/04/2023] Open
Abstract
BACKGROUND & OBJECTIVES Resistance to organophosphorous and carbamate insecticides amongst German cockroaches is widely reported. Cyphenothrin EC, a new synthetic pyrethroid was evaluated in cookhouses in an urban area, with the aim of exploring alternate control option against the German cockroach Blatella germanica. METHODS Three cookhouses were selected by simple random sampling method, two for treatment and one as control. The impact of treatment on cockroach infestation was monitored weekly by visual assessment sampling technique. RESULTS Cyphenothrin brought about 95 to 97.5% reduction in cockroach infestation by the end of six weeks post-treatment. INTERPRETATION & CONCLUSION The study reports the efficacy of cyphenothrin in the control of German cockroaches and recommends an "Integrated insecticide strategy" for the control of cockroaches in urban cookhouses.
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Affiliation(s)
- Rina Tilak
- Department of Preventive and Social Medicine, Armed Forces Medical College, Pune, India.
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Anand KP, Dutta J, Tiwari VD. MEDICAL PHILATELY. Med J Armed Forces India 2003. [DOI: 10.1016/s0377-1237(03)80106-5] [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: 11/17/2022] Open
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Anand KP, Dutta J. Taming Malaria in India. Med J Armed Forces India 2002. [DOI: 10.1016/s0377-1237(02)80092-2] [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] Open
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Pandit B, Roy M, Dutta J, Padhi BK, Bhoumik G, Bhattacharyya NP. Co-amplification of dhfr and a homologue of hmsh3 in a Chinese hamster methotrexate-resistant cell line correlates with resistance to a range of chemotherapeutic drugs. Cancer Chemother Pharmacol 2001; 48:312-8. [PMID: 11710632 DOI: 10.1007/s002800100352] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
PURPOSE To characterize a methotrexate-resistant Chinese hamster cell line, designated as M5, which had previously been shown to be resistant to gamma radiation, at the cellular and molecular levels. METHODS Sensitivity towards a number of chemotherapeutic drugs was determined by colony-forming ability and compared with that of parental V79 cells. Expression of the hamster homologue of the human mismatch repair gene hmsh3 was also determined by RT-PCR. RESULTS Induced killing by chemotherapeutic agents cis-diamminedichloroplatinum II (cisplatin). the antimetabolite 6-thioguanine (6-TG), camptothecin, a topoisomerase I inhibitor, and 4-(9-acridinyl-amino)-methanesulfon-m-anisidide (mAMSA), an inhibitor of topoisomerase II, was less in M5 cells than in the parental V79 cells. The IC50 values, defined as the concentration of the drug that reduced the survival to 50% that of the untreated control, in V79 cells for mAMSA and camptothecin treatment were 0.35 +/- 0.02 microg/ml and 84.3 +/- 16.0 ng/ml, respectively. For M5 cells, equivalent values were 0.52 +/- 0.10 microg/ml and 186 +/- 40.8 ng/ml. Treatment with 30 microM cisplatin reduced the survival of V79 cells to 0.09 +/- 0.07, whereas the same treatment reduced the survival of M5 cells to 0.67 +/- 0.16. Treatment of M5 cells with 6-TG did not induce appreciable killing up to the concentrations studied. However, for V79 cells, 6-TG was very toxic. We further observed that the dihydrofolate reductase (dhfr) gene as well as the hamster homologue of the human mismatch repair gene hmsh3 was amplified in the methotrexate-resistant M5 cells. CONCLUSION Resistance to this group of chemotherapeutic drugs observed in M5 cells could be due to the amplification of the hamster homologue of hMSH3, which in turn possibly sequesters all the hMSH2 making M5 cells functionally deficient in the mismatch repair system.
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Affiliation(s)
- B Pandit
- Crystallography and Molecular Biology Division, Saha Institute of Nuclear Physics, Calcutta, India
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Affiliation(s)
- B C Ranu
- Department of Organic Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Calcutta - 700 032, India.
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Ranu BC, Dutta J, Guchhait SK. Indium metal as a reducing agent. Selective reduction of the carbon-carbon double bond in highly activated conjugated alkenes. Org Lett 2001; 3:2603-5. [PMID: 11483071 DOI: 10.1021/ol016296a] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] Indium metal in aqueous ethanolic ammonium chloride reduces the C=C bond in highly activated conjugated alkenes such as alpha,alpha-dicyano olefins, beta-arylenones, and enone esters.
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Affiliation(s)
- B C Ranu
- Department of Organic Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Calcutta 700 032, India.
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Affiliation(s)
- J. Dutta
- Nuclear and Analytical Laboratory, Department of Chemistry, Burdwan University, Burdwan 713104, India
| | - S. Basu
- Nuclear and Analytical Laboratory, Department of Chemistry, Burdwan University, Burdwan 713104, India
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Dutta J, Hofmann H, Houriet R, Hofmeister H, Hollenstein C. Growth, microstructure and sintering behavior of nanosized silicon powders. Colloids Surf A Physicochem Eng Asp 1997. [DOI: 10.1016/s0927-7757(97)00107-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Dutta J, Hofmann H, Houriet R, Valmalette JC, Hofmeister H. Crystallization of nanosized silicon powder prepared by plasma-induced clustering reactions. AIChE J 1997. [DOI: 10.1002/aic.690431303] [Citation(s) in RCA: 6] [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: 11/08/2022]
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Hornyak G, Patrissi C, Oberhauser E, Martin C, Valmalette JC, Lemaire L, Dutta J, Hofmann H. Effective medium theory characterization of Au/Ag nanoalloy-porous alumina composites. ACTA ACUST UNITED AC 1997. [DOI: 10.1016/s0965-9773(97)00127-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Hornyak G, Patrissi C, Martin C, Valmalette JC, Dutta J, Hofmann H. Dynamical Maxwell-Garnett optical modeling of nanogold-porous alumina composites: Mie and Kappa influence on absorption maxima. ACTA ACUST UNITED AC 1997. [DOI: 10.1016/s0965-9773(97)00128-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Hofmeister H, Dutta J, Hofmann H. Atomic structure of amorphous nanosized silicon powders upon thermal treatment. Phys Rev B Condens Matter 1996; 54:2856-2862. [PMID: 9986140 DOI: 10.1103/physrevb.54.2856] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Affiliation(s)
- J. Dutta
- Department of Chemistry, Burdwan University, Burdwan - 713104, India
| | - S. Basu
- Department of Chemistry, Burdwan University, Burdwan - 713104, India
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Affiliation(s)
- D. C. Gautam
- Department of Biosciences, Himachal Pradesh University
| | - J. Dutta
- Department of Biosciences, Himachal Pradesh University
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Banerjee I, Saha S, Dutta J. Comparison of the effects of dietary fish oils with different n-3 polyunsaturated fatty acid compositions on plasma and liver lipids in rats. Lipids 1992; 27:425-8. [PMID: 1630277 DOI: 10.1007/bf02536383] [Citation(s) in RCA: 17] [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: 12/28/2022]
Abstract
The effects of dietary fish oils with different n-3 polyunsaturated fatty acid compositions on plasma lipid profiles in rats have been studied. Forty-eight male rats, previously maintained on a cholesterol-free diet for 15 days, were fed for 60 days with diets supplemented with 10% fat of either marine hilsa fish (Hilsa ilisa, family clupeidae) or fresh-water chital fish (Notopterus chitala, family notopteridae). The diets had similar levels of total saturated (35-41%), monounsaturated (43-47%) and n-3 polyunsaturated (9-10%) fatty acids. Cholesterol contents of the diets were adjusted to 0.85%; gamma-linolenic acid (3.3%) in chital oil and eicosapentaenoic acid (4.9%) in hilsa oil diets were the major n-3 contributors. The percentage of eicosapentaenoic acid in the chital oil diet was 0.57 times that of the hilsa oil diet, but the eicosapentaenoic (EPA) to arachidonic acid (AA) ratio in the latter (4.08) was 3.2 times that of the former (1.27). Sixty days of hilsa oil diet feeding decreased the levels of cholesterol (53.3 +/- 2.9 to 50.0 +/- 1.1 mg/dL), triacylglycerol (75.7 +/- 3.8 to 64.3 +/- 2.6 mg/dL) and phospholipid (55.8 +/- 1.5 to 51.7 +/- 3.1 mg/dL) in rat plasma. Similar treatment with chital oil diet elevated the plasma cholesterol level (53.3 +/- 2.9 to 62.3 +/- 7.6 mg/dL) while triacylglycerol and phospholipid contents remained unaltered. Both the dietary treatments decreased the levels of linoleic and arachidonic acids in liver but only under the hilsa oil diet did the eicosapentaenoic acid percentage increase markedly (0.8 +/- 0.06% to 5.5 +/- 0.06%) at the expense of arachidonic acid.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- I Banerjee
- Department of Chemistry, Bose Institute, Calcutta, India
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Bandyopadhyay I, Saha S, Dutta J. Effect of dietary fish oil on platelet aggregability: comparison between two oils with different eicosapentaenoic to arachidonic acid ratio. Biochem Int 1991; 25:919-28. [PMID: 1804110] [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] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Rats, acclimatized on a control diet, were fed for 60 days with diets, supplemented with 10% fat of either marine Hilsa fish (Hilsa ilisa) or fresh-water Chital fish (Notopterus chitala). The percentage of eicosapentaenoic acid in chital oil diet was 0.57 times that of the hilsa oil diet, but the eicosapentaenoic to arachidonic acid ratio in the latter (4.08) was 3.2 times that of the former (1.27). Otherwise these two diets were comparable in respect to total saturated, monounsaturated and n-3 polyunsaturated fatty acid contents. Results showed that of the two only hilsa oil diet could significantly lower platelet aggregability and in vitro thromboxane production, through replacement of arachidonic acid in platelet phospholipid by eicosapentaenoic acid. The antithrombic criteria of the oil seems to be a combination of low arachidonic acid content and high eicosapentaenoic to arachidonic acid ratio.
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Ghosh D, Mukherjee E, Dutta J. Stabilization of prostaglandin synthetase by immobilization of goat seminal microsomes on silica gel-G. Indian J Biochem Biophys 1990; 27:76-80. [PMID: 2162320] [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] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Prostaglandin synthetase was immobilized by adsorption of goat vesicular microsomes on silica gel containing CaSO4 (silica gel G). Repeated cycles of enzymatic conversion of arachidonic acid to prostaglandin by the immobilized microsomes increased the product yield by 1.5 fold, in comparison to the same by free microsomal particles. The presence of Ca2+ in silica gel is responsible for this improved yield of prostaglandin as the divalent metal ion stabilized prostaglandin synthetase activity in a remarkable way. Microsomal particles immobilized on solid supports like alumina G and controlled pore glass were not very effective.
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Affiliation(s)
- D Ghosh
- Department of Chemistry, Bose Institute, Calcutta
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Ganguly G, Dutta J, Ray S, Barua AK. Radiofrequency-plasma-deposited hydrogenated fluorinated silicon-carbon alloy films. Phys Rev B Condens Matter 1989; 40:3830-3836. [PMID: 9992352 DOI: 10.1103/physrevb.40.3830] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Dutta J, Laha U, Mukhopadhyaya S, Talukdar B. Relativistic compton profiles for rare gases. Chem Phys Lett 1986. [DOI: 10.1016/0009-2614(86)80345-1] [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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Misra S, Dutta AK, Dhar T, Ghosh A, Choudhury A, Dutta J. Fatty acids of the mud skipper Boleophthalmus boddaerti. J Sci Food Agric 1983; 34:1413-1418. [PMID: 6664080 DOI: 10.1002/jsfa.2740341215] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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