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Srivastava A, Ali SM, Dumpala RMR, Kumar S, Kumar P, Rawat N, Mohapatra PK. Unusual redox stability of pentavalent uranium with hetero-bifunctional phosphonocarboxylate: insight into aqueous speciation. Dalton Trans 2024; 53:7321-7339. [PMID: 38591248 DOI: 10.1039/d4dt00173g] [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: 04/10/2024]
Abstract
The +5 state is an unusual oxidation state of uranium due to its instability in the aqueous phase. As a result, gaining information about its aqueous speciation is extremely difficult. The present work is an attempt in that direction and it provides insight into the existence of a new pentavalent species in the presence of hetero-bifunctional phosphonocarboxylate (PC) chelators, other than the carbonate ion, in the aqueous medium. The aqueous chemistry of pentavalent uranium species with three environmentally relevant PCs was probed using electrochemical and DFT methods to understand the redox energy and kinetics of conversion of the U(VI)/U(V) couple, stability, structure, stoichiometry, binding modes, etc. Interestingly, pentavalent uranium complexes with PCs are quite persistent over a wide range of pH starting from acidic to alkaline conditions. The PC chelators block the cation-cation interaction (CCI) of U(V) through strong hetero-bidentate chelation and intermolecular hydrogen bonding (IMHB) interactions which stabilize the pentavalent metal ion against disproportionation. For uranyl species in the presence of PCs, acting as chelators, CV plots were obtained at varying pH values from 2 to 8. The obtained results indicate an irreversible single redox peak involving U(VI) to U(V) conversion and association of a coupled chemical reaction with the electron transfer step. ESI-MS studies were performed to understand the speciation effect on the U(VI)/U(V) redox couple with varying pH. Speciation modelling of U(V) with the PC ligands was carried out, which indicated that the U(V) is redox stable in nearly 47% of the pH region in the presence of the PCs as compared to the carboxylate-based chelators. The free energy and reduction potential of the U(V) complexes and the reduction free energy and disproportionation free energy for the U(VI)/U(V) couple were determined by DFT computations in the presence of the PCs. In situ spectroelectrochemical spectra were recorded to provide evidence for the existence of U(V) species with PCs in the aqueous medium and to acquire its absorption spectra. The present study is highly significant for understanding the coordination chemistry of pentavalent uranium species, accurate modelling of uranium, and isolation of U(V).
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Affiliation(s)
- Ashutosh Srivastava
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, India-400085.
| | - Sk Musharaf Ali
- Chemical Engineering Division, Bhabha Atomic Research Centre, Mumbai, India-400085
| | | | - Sumit Kumar
- Radioanalytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai, India-400085
| | - Pranaw Kumar
- Fuel Chemistry Division, Bhabha Atomic Research Centre, Mumbai, India-400085
| | - Neetika Rawat
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, India-400085.
| | - P K Mohapatra
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, India-400085.
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Kanekar AS, Bhattacharyya A, Mohapatra PK. Ligand structure and diluent nature in defining improved Am 3+ and Cm 3+ separation using diglycolamides: a combined solvent extraction and DFT study. Dalton Trans 2024; 53:5871-5880. [PMID: 38415375 DOI: 10.1039/d3dt03261b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
Separation of Am3+ and Cm3+ is one of the most challenging yet unavoidable steps in the back end of the nuclear cycle. Various ligands evaluated for Am/Cm separation have their own merits and demerits, and not a single ligand has been uniquely proposed for this purpose. In the present work, we evaluated N,N,N',N'-tetra-n-octyldiglycolamide (TODGA) vis-à-vis N,N,N',N'-tetra-2-ethylhexyldiglycolamide (T2EHDGA) in combination with a hydrophilic 2,6-bis(1,2,4-triazinyl)pyridine (SO3PhBTP) derivative in the aqueous phase for the separation of Am3+ and Cm3+ from nitric acid medium. The results showed that marginal selectivity for Am3+ over Cm3+ was observed with T2EHDGA in the presence of SO3PhBTP, which was attributed to the difference in the entropy change for their extraction from both the temperature-dependent liquid-liquid extraction and computational studies.
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Affiliation(s)
- A S Kanekar
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India.
| | - A Bhattacharyya
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India.
| | - P K Mohapatra
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India.
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Kaur P, Borah PK, Uike PV, Mohapatra PK, Das NK, Gaigaware P, Tobgay KJ, Tushi A, Zorinsangi, Mazumdar G, Marak B, Pizi D, Chakma T, Sugunan AP, Vijayachari P, Bhardwaj RR, Arambam PC, Kutum T, Sharma A, Pal P, Shanmugapriya PC, Manivel P, Kaliyamoorthy N, Chakma J, Mathur P, Dhaliwal RS, Mahanta J, Mehendale SM. Non-communicable diseases as a major contributor to deaths in 12 tribal districts in India. Indian J Med Res 2022; 156:250-259. [PMID: 36629184 PMCID: PMC10057361 DOI: 10.4103/ijmr.ijmr_3332_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
Background & objectives Non-communicable diseases (NCDs) are the leading cause of death in India. Although studies have reported a high prevalence of NCD in tribal populations, there are limited data pertaining mortality due to NCDs. Therefore, in this study we estimated the proportion of deaths due to NCDs among 15 yr and older age group in tribal districts in India. Methods We conducted a community-based survey in 12 districts (one per State) with more than 50 per cent tribal population. Data were collected using a verbal autopsy tool from the family member of the deceased. The estimated sample size was 452 deaths per district. We obtained the list of deaths for the reference period of one year and updated it during the survey. The cause of death was assigned using the International Classification of Diseases-10 classification and analyzed the proportions of causes of death. The age-standardized death rate (ASRD) was also estimated. Results We surveyed 5292 deaths among those above 15 years of age. Overall, NCDs accounted for 66 per cent of the deaths, followed by infectious diseases (15%) and injuries (11%). Cardiovascular diseases were the leading cause of death in 10 of the 12 sites. In East Garo Hills (18%) and Lunglei (26%), neoplasms were the leading cause of death. ASRD due to NCD ranged from 426 in Kinnaur to 756 per 100,000 in East Garo Hills. Interpretation & conclusions The findings of this community-based survey suggested that NCDs were the leading cause of death among the tribal populations in India. It is hence suggested that control of NCDs should be one of the public health priorities for tribal districts in India.
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Affiliation(s)
- Prabhdeep Kaur
- Division of Non-communicable Diseases, ICMR-National Institute of Epidemiology, Chennai, Tamil Nadu, India
| | - P K Borah
- ICMR-Regional Medical Research Centre, NE Region, Dibrugarh, Assam, India
| | - Pankaj V Uike
- Division of Non-communicable Diseases, ICMR-National Institute of Epidemiology, Chennai, Tamil Nadu, India
| | - P K Mohapatra
- ICMR-Regional Medical Research Centre, NE Region, Dibrugarh, Assam, India
| | - Nabajit Kr Das
- ICMR-Regional Medical Research Centre, NE Region, Dibrugarh, Assam, India
| | - Pooja Gaigaware
- Division of Non-communicable Diseases, ICMR-National Institute of Epidemiology, Chennai, Tamil Nadu, India
| | - Karma Jigme Tobgay
- Department of Health Care, Human Services & Family Welfare, Government of Sikkim, Gangtok, Sikkim, India
| | - Aonungdok Tushi
- Department of Health & Family Welfare, Government of Nagaland, Mokokchung, Nagaland, India
| | - Zorinsangi
- Health & Family Welfare Department, Government of Mizoram, Aizwal, Mizoram, India
| | | | - Bibha Marak
- Department of Health & Family Welfare, Government of Meghalaya, East Garo Hills, Meghalaya, India
| | - Dirang Pizi
- Department of Health & Family Welfare, Government of Arunachal Pradesh, East Kameng, Arunachal Pradesh, India
| | - Tapas Chakma
- Division of Non-communicable Diseases, ICMR-National Institute of Research in Tribal Health, Jabalpur, Madhya Pradesh, India
| | - A P Sugunan
- Department of Microbiology, ICMR-Regional Medical Research Centre, Port Blair, Andaman & Nicobar Island
| | - P Vijayachari
- Department of Microbiology, ICMR-Regional Medical Research Centre, Port Blair, Andaman & Nicobar Island
| | - Rakesh R Bhardwaj
- Department of Health & Family Welfare, Government of Himachal Pradesh, Shimla, Himachal Pradesh, India
| | - Probin C Arambam
- Directorate of Health Services, Government of Manipur, Imphal, Manipur, India
| | - Tridip Kutum
- ICMR-Regional Medical Research Centre, NE Region, Dibrugarh, Assam, India
| | - Anand Sharma
- ICMR-Regional Medical Research Centre, NE Region, Dibrugarh, Assam, India
| | - Piyalee Pal
- Division of Non-communicable Diseases, ICMR-National Institute of Epidemiology, Chennai, Tamil Nadu, India
| | - P C Shanmugapriya
- Division of Non-communicable Diseases, ICMR-National Institute of Epidemiology, Chennai, Tamil Nadu, India
| | - Prathab Manivel
- Division of Non-communicable Diseases, ICMR-National Institute of Epidemiology, Chennai, Tamil Nadu, India
| | - Neelakandan Kaliyamoorthy
- Division of Non-communicable Diseases, ICMR-National Institute of Epidemiology, Chennai, Tamil Nadu, India
| | - Joy Chakma
- Division of Non-communicable Diseases, Indian Council of Medical Research, New Delhi, India
| | - Prashant Mathur
- ICMR-National Centre for Disease Informatics & Research, Bengaluru, Karnataka, India
| | - R S Dhaliwal
- Division of Non-communicable Diseases, Indian Council of Medical Research, New Delhi, India
| | - J Mahanta
- ICMR-Regional Medical Research Centre, NE Region, Dibrugarh, Assam, India
| | - Sanjay M Mehendale
- Division of Non-communicable Diseases, ICMR-National Institute of Epidemiology, Chennai, Tamil Nadu, India
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Kaur P, Borah PK, Gaigaware P, Mohapatra PK, R Das NK, Uike PV, Tobgay KJ, Tushi A, Zorinsangi, Mazumdar G, Marak B, Pizi D, Chakma T, Sugunan AP, Vijayachari P, Bhardwaj RR, Arambam PC, Kutum T, Sharma A, Pal P, Shanmugapriya PC, Manivel P, Kaliyamoorthy N, Chakma J, Mathur P, Dhaliwal RS, Mahanta J, Mehendale SM. Preparedness of primary & secondary care health facilities for the management of non-communicable diseases in tribal population across 12 districts in India. Indian J Med Res 2022; 156:260-268. [PMID: 36629185 PMCID: PMC10057372 DOI: 10.4103/ijmr.ijmr_3248_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Background and objectives Non-communicable diseases (NCDs) are highly prevalent in the tribal populations; however, there are limited data regarding health system preparedness to tackle NCDs among these populations. We estimated the availability of human resources, equipment, drugs, services and knowledge of doctors for NCD management in the selected tribal districts in India. Methods A cross-sectional survey was conducted in 12 districts (one from each State) with at least 50 per cent tribal population in Andaman and Nicobar Islands, Himachal Pradesh, Madhya Pradesh, Odisha and eight northeastern States. Primary health centres (PHCs), community health centres (CHCs) and district/sub-district hospitals (DHs) were surveyed and data on screening and treatment services, human resources, equipment, drugs and information systems indicators were collected and analysed. The data were presented as proportions. Results In the present study 177 facilities were surveyed, including 156 PHCs/CHCs and 21 DHs. DHs and the majority (82-96%) of the PHCs/CHCs provided outpatient treatment for diabetes and hypertension. Overall, 97 per cent of PHCs/CHCs had doctors, and 78 per cent had staff nurses. The availability of digital blood pressure monitors ranged from 35 to 43 per cent, and drugs were either not available or inadequate. Among 213 doctors, three-fourths knew the correct criteria for hypertension diagnosis, and a few correctly reported diabetes diagnosis criteria. Interpretation & conclusions The results of this study suggest that the health system of the studied tribal districts was not adequately prepared to manage NCDs. The key challenges included inadequately trained workforce and a lack of equipment and drugs. It is suggested that capacity building and, procurement and distribution of equipment, drugs and information systems to track NCD patients should be the key focus areas of national programmes.
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Affiliation(s)
- Prabhdeep Kaur
- Division of Non-communicable Diseases, ICMR-National Institute of Epidemiology, Chennai, Tamil Nadu, India
| | - P K Borah
- ICMR-Regional Medical Research Centre, NE Region, Dibrugarh, Assam, India
| | - Pooja Gaigaware
- Division of Non-communicable Diseases, ICMR-National Institute of Epidemiology, Chennai, Tamil Nadu, India
| | - P K Mohapatra
- ICMR-Regional Medical Research Centre, NE Region, Dibrugarh, Assam, India
| | - Nabajit K R Das
- ICMR-Regional Medical Research Centre, NE Region, Dibrugarh, Assam, India
| | - Pankaj V Uike
- Division of Non-communicable Diseases, ICMR-National Institute of Epidemiology, Chennai, Tamil Nadu, India
| | - Karma Jigme Tobgay
- Department of Health Care, Human Services & Family Welfare, Government of Sikkim, Gangtok, Sikkim, India
| | - Aonungdok Tushi
- Department of Health & Family Welfare, Government of Nagaland, Mokokchung, Nagaland, India
| | - Zorinsangi
- Department of Health & Family Welfare, Government of Mizoram, Aizwal, Mizoram, India
| | | | - Bibha Marak
- Department of Health & Family Welfare, Government of Meghalaya, East Garo Hills, Meghalaya, India
| | - Dirang Pizi
- Department of Health & Family Welfare, Government of Arunachal Pradesh, East Kameng, Arunachal Pradesh, India
| | - Tapas Chakma
- Division of Non-communicable Diseases, ICMR- National Institute of Research in Tribal Health, Jabalpur, Madhya Pradesh, India
| | - A P Sugunan
- ICMR-Regional Medical Research Centre, Port Blair, Andaman & Nicobar Islands, India
| | - P Vijayachari
- ICMR-Regional Medical Research Centre, Port Blair, Andaman & Nicobar Islands, India
| | - Rakesh R Bhardwaj
- Department of Health & Family Welfare, Government of Himachal Pradesh, Shimla, Himachal Pradesh, India
| | - Probin C Arambam
- Directorate of Health Services, Government of Manipur, Imphal, Manipur, India
| | - Tridip Kutum
- ICMR-Regional Medical Research Centre, NE Region, Dibrugarh, Assam, India
| | - Anand Sharma
- ICMR-Regional Medical Research Centre, NE Region, Dibrugarh, Assam, India
| | - Piyalee Pal
- Division of Non-communicable Diseases, ICMR-National Institute of Epidemiology, Chennai, Tamil Nadu, India
| | - P C Shanmugapriya
- Division of Non-communicable Diseases, ICMR-National Institute of Epidemiology, Chennai, Tamil Nadu, India
| | - Prathab Manivel
- Division of Non-communicable Diseases, ICMR-National Institute of Epidemiology, Chennai, Tamil Nadu, India
| | - Neelakandan Kaliyamoorthy
- Division of Non-communicable Diseases, ICMR-National Institute of Epidemiology, Chennai, Tamil Nadu, India
| | - Joy Chakma
- Indian Council of Medical Research, New Delhi, India
| | - Prashant Mathur
- ICMR-National Centre for Disease Informatics & Research, Bengaluru, Karnataka, India
| | - R S Dhaliwal
- Indian Council of Medical Research, New Delhi, India
| | - J Mahanta
- ICMR-Regional Medical Research Centre, NE Region, Dibrugarh, Assam, India
| | - Sanjay M Mehendale
- Division of Non-communicable Diseases, ICMR-National Institute of Epidemiology, Chennai, Tamil Nadu, India
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Mohapatra PK, Sahoo SK. A Study on the Effects of Surfactant Concentration and Particle Size on Ethylcellulose Microspheres Containing Indinavir Sulphate. Indian J Pharm Sci 2022. [DOI: 10.36468/pharmaceutical-sciences.1054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
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Bhattacharyya A, Ansari SA, Karthikeyan NS, Ravichandran C, Venkatachalapathy B, Rao TS, Seshadri H, Mohapatra PK. Bis-(1,2,4-triazin-3-yl) ligand structure driven selectivity reversal between Am 3+ and Cm 3+: solvent extraction and DFT studies. Dalton Trans 2021; 50:7783-7790. [PMID: 33999062 DOI: 10.1039/d1dt00307k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Selectivity between Am3+ and Cm3+ was investigated after their aqueous complexation with three structurally tailored hydrophilic bis-(1,2,4-triazin-3-yl) ligands followed by their extraction with N,N,N'N'-tetraoctyl diglycolamide (TODGA) dissolved in an ionic liquid (C4mim·Tf2N). The three hydrophilic ligands used were SO3PhBTP, SO3PhBTBP, and SO3PhBTPhen. It was evident from the solvent extraction studies that SO3PhBTP formed a stronger complex with Cm3+ than with Am3+, but SO3PhBTPhen showed better complexation ability for Am3+ than for Cm3+, and SO3PhBTBP showed no selectivity for the two actinide ions. DFT calculations indicated that the coordinating 'N' atoms in BTP were more co-planar in the complex and this co-planarity was higher in the Cm3+ complex as compared to that in Am3+. In the case of BTBP and BTPhen ligands, on the other hand, the co-planarity was more pronounced in the Am3+ complexes. Mayer's bond order calculations of M-N bonds in the complexes also indicated a reversal of the complexation ability of the BTP and BTPhen ligands for Am3+ and Cm3+. Calculations of the complexation energies further supported the higher selectivity of the BTP ligand for Am3+ by -52.0 kJ mol-1, and better selectivity of the BTPhen ligand for Cm3+ by -24.7 kJ mol-1.
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Affiliation(s)
| | - S A Ansari
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai - 400 085, India.
| | - N S Karthikeyan
- Easwari Engineering College, Ramapuram, Chennai - 600089, India
| | - C Ravichandran
- Easwari Engineering College, Ramapuram, Chennai - 600089, India
| | | | - T S Rao
- Water & Steam Chemistry Division, BARC, Kalpakkam - 603102, India
| | - H Seshadri
- Safety Research Institute, Atomic Energy Regulatory Board, Kalpakkam - 603102, India
| | - P K Mohapatra
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai - 400 085, India.
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Kumar R, Ansari SA, Kandwal P, Mohapatra PK. Selective permeation of 90Y from a mixture of 90Y/ 90Sr through diglycolamide impregnated supported liquid membranes. Appl Radiat Isot 2021; 170:109604. [PMID: 33550088 DOI: 10.1016/j.apradiso.2021.109604] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 12/23/2020] [Accepted: 01/19/2021] [Indexed: 11/29/2022]
Abstract
An attempt was made in this work to evaluate a simple flat sheet supported liquid membrane technique for the separation of carrier free 90Y from 90Sr using two diglycolamide carrier ligands, (i) N,N,N',N'-tetra-n-octyl-diglycolamide (TODGA), and (ii) N,N,N',N'-tetra-(2-ethylhexyl)-diglycolamide (TEHDGA). Various experimental parameters were optimized to get selective transport of 90Y over 90Sr. At 6 M HNO3 feed acidity, >95% 90Y could be recovered selectively in just 4 h with both the ligands. Under identical experimental conditions, about 0.1% transport of Sr was also recorded which could be completely removed by passing through a Sr selective column to get medical grade 90Y pure product. A mathematical model equation was also derived and experimentally validated for predicting the transport of 90Y through membrane.
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Affiliation(s)
- Rohit Kumar
- Department of Chemistry, National Institute of Technology Uttarakhand, Garhwal, Srinagar, 246174, India
| | - S A Ansari
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India.
| | - Pankaj Kandwal
- Department of Chemistry, National Institute of Technology Uttarakhand, Garhwal, Srinagar, 246174, India.
| | - P K Mohapatra
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
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Ansari SA, Sahoo GC, Dey S, Majumdar S, Mohapatra PK. Radiation stability of ceramic tubular membranes containing ammonium molybdophosphate (AMP) for the application of radio-cesium recovery from radioactive wastes. J Radioanal Nucl Chem 2020. [DOI: 10.1007/s10967-020-07449-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Mahanty B, Verma PK, Mohapatra PK. Extraction of Some Actinide Ions from Nitric Acid Feeds Using N, N-di-n-hexyloctanamide (DHOA) in an Ionic Liquid. J SOLUTION CHEM 2020. [DOI: 10.1007/s10953-020-00970-8] [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: 10/24/2022]
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Sivaramakrishna M, Raut DR, Nayak SK, Nayak SK, Mohapatra PK. Extraction of plutonium(IV) from acidic feeds using several diamides with a tri-phenyl pyridine centre. J Radioanal Nucl Chem 2019. [DOI: 10.1007/s10967-019-06459-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Mohapatra PK, Verma PK, Prabhu DR, Raut DR. Extraction of 137Cs from Acidic Feed by Centrifugal Contactors Using a Solution of Calix[4]arene-bis-1,2-benzo-crown-6 in Phenyltrifluoromethyl Sulphone. NUCL TECHNOL 2019. [DOI: 10.1080/00295450.2019.1575126] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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)
- P. K. Mohapatra
- Bhabha Atomic Research Centre, Radiochemistry Division, Trombay, Mumbai, India
| | - P. K. Verma
- Bhabha Atomic Research Centre, Radiochemistry Division, Trombay, Mumbai, India
| | - D. R. Prabhu
- Bhabha Atomic Research Centre, Radiochemistry Division, Trombay, Mumbai, India
| | - D. R. Raut
- Bhabha Atomic Research Centre, Radiochemistry Division, Trombay, Mumbai, India
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Bhattacharyya A, Ansari SA, Prabhu DR, Kumar D, Mohapatra PK. Highly efficient separation of Am3+ and Eu3+ using an aqueous soluble sulfonated BTP derivative by hollow-fiber supported liquid membrane containing TODGA. SEP SCI TECHNOL 2019. [DOI: 10.1080/01496395.2019.1578803] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- A. Bhattacharyya
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, India
- Homi Bhabha National Institute, Mumbai, India
| | - S. A. Ansari
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, India
| | - D. R. Prabhu
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, India
| | - Dheeraj Kumar
- Radiopharmaceuticals Program (RPhP) Group, Board of Radiation and Isotope Technology, Vashi, Navi-Mumbai, India
| | - P. K. Mohapatra
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, India
- Homi Bhabha National Institute, Mumbai, India
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Chaudhury S, Ansari SA, Mohapatra PK, Noronha DM, Pillai JS, Srivastava A, Pius IC. Demonstration of Hollow Fiber Membrane Technique for the Recovery of Plutonium from Analytical Laboratory Waste. NUCL TECHNOL 2018. [DOI: 10.1080/00295450.2018.1510699] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- S. Chaudhury
- Bhabha Atomic Research Centre, Fuel Chemistry Division, Mumbai–400 085, India
| | - S. A. Ansari
- Bhabha Atomic Research Centre, Radiochemistry Division, Mumbai–400 085, India
| | - P. K. Mohapatra
- Bhabha Atomic Research Centre, Radiochemistry Division, Mumbai–400 085, India
| | - D. M. Noronha
- Bhabha Atomic Research Centre, Fuel Chemistry Division, Mumbai–400 085, India
| | - J. S. Pillai
- Bhabha Atomic Research Centre, Fuel Chemistry Division, Mumbai–400 085, India
| | - Ashutosh Srivastava
- Bhabha Atomic Research Centre, Radioanalytical Chemistry Division, Mumbai–400 085, India
| | - I. C. Pius
- Bhabha Atomic Research Centre, Fuel Chemistry Division, Mumbai–400 085, India
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Gujar RB, Ansari SA, Verboom W, Mohapatra PK. Highly Efficient Extraction Chromatography Resins Containing Dendrimers with DGA Groups in Ionic Liquid for Actinide Uptake. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b02836] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- R. B. Gujar
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai-400 085, India
| | - S. A. Ansari
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai-400 085, India
| | - W. Verboom
- Laboratory of Molecular Nanofabrication, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - P. K. Mohapatra
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai-400 085, India
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Sarmah NP, Sarma K, Bhattacharyya DR, Sultan AA, Bansal D, Singh N, Bharti PK, Sehgal R, Mohapatra PK, Parida P, Mahanta J. Antifolate drug resistance: Novel mutations and haplotype distribution in dhps and dhfr from Northeast India. J Biosci 2018; 42:531-535. [PMID: 29229871 DOI: 10.1007/s12038-017-9706-5] [Citation(s) in RCA: 13] [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] [Indexed: 10/18/2022]
Abstract
Malaria is a major public health concern in Northeast India with a preponderance of drug-resistant strains. Until recently the partner drug for artemisinin combination therapy (ACT) was sulphadoxine pyrimethamine (SP). Antifolate drug resistance has been associated with the mutations at dihydropteroate synthase (dhps) and dihydrofolatereductase (dhfr) genes. This study investigated antifolate drug resistance at the molecular level. A total of 249 fever cases from Arunachal Pradesh, NE India, were screened for malaria, and of these, 75 were found to be positive for Plasmodium falciparum. Samples were sequenced and analysed with the help of BioEdit and ClustalW. Three novel point mutations were found in the dhps gene with 10 haplotypes along with the already reported mutations. A single haplotype having quadruple mutation was found in the dhfr gene. The study reports higher degree of antifolate drug resistance as evidenced by the presence of multiple point mutations in dhps and dhfr genes. The findings of this study strongly discourage the use SP as a partner drug in ACT.
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Affiliation(s)
- N P Sarmah
- Regional Medical Research Centre (Indian Council of Medical Research), Dibrugarh, Assam 786 001, India
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16
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Ansari SA, Mohapatra PK, Raut DR. Extraction of
$$ {\text{Np}}^{4+} $$
Np
4
+
and
$$ {\text{NpO}}_{2}^{2+} $$
NpO
2
2
+
from Nitric Acid Medium Using TODGA in Room Temperature Ionic Liquids. J SOLUTION CHEM 2018. [DOI: 10.1007/s10953-018-0741-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [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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17
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Verma PK, Mohapatra PK, Bhattacharyya A, Yadav AK, Jha SN, Bhattacharyya D. Structural investigations on uranium(vi) and thorium(iv) complexation with TBP and DHOA: a spectroscopic study. NEW J CHEM 2018. [DOI: 10.1039/c7nj04460g] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Spectroscopic studies were carried out to understand the complexation of U(vi) and Th(iv) with tri-butyl phosphate (TBP) and N,N-dihexyl octanamide (DHOA) in different non-aqueous solvents.
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Affiliation(s)
- P. K. Verma
- Radiochemistry Division
- Bhabha Atomic Research Centre
- Mumbai – 400 085
- India
| | - P. K. Mohapatra
- Radiochemistry Division
- Bhabha Atomic Research Centre
- Mumbai – 400 085
- India
| | - A. Bhattacharyya
- Radiochemistry Division
- Bhabha Atomic Research Centre
- Mumbai – 400 085
- India
| | - A. K. Yadav
- Atomic and Molecular Physics Division, Bhabha Atomic Research Centre
- Mumbai – 400 085
- India
| | - S. N. Jha
- Atomic and Molecular Physics Division, Bhabha Atomic Research Centre
- Mumbai – 400 085
- India
| | - D. Bhattacharyya
- Atomic and Molecular Physics Division, Bhabha Atomic Research Centre
- Mumbai – 400 085
- India
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18
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Gupta SS, Azmi L, Mohapatra PK, Rao CV. Flavonoids from whole Plant of Euphorbia hirta and their Evaluation against Experimentally induced Gastroesophageal Reflux Disease in Rats. Pharmacogn Mag 2017; 13:S127-S134. [PMID: 28479737 PMCID: PMC5407104 DOI: 10.4103/0973-1296.203987] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [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: 01/22/2016] [Revised: 03/02/2016] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND Euphorbia hirta possesses antibacterial, anti-inflammatory, galactogenic, antidiarrheal, antioxidant, hypoglycemic, antiasthmatic, antiamebic, antifungal, and antimalarial activities. OBJECTIVE The overall objective of the current study was the investigation of the whole plant extract of E. hirta and flavonoids from E. hirta on gastroesophageal reflux disease (GERD) in rats. MATERIALS AND METHODS The whole plant extract of E. hirta was characterized by analysis of flavonoids (HPLC: HPLC, UV, IR, MS and 1HNMR). GERD model was induced surgically in Wistar rats under pentobarbitone sodium anesthesia (50 mg/kg, i.p.) and the tissue esophagus and stomach were removed. The tissues were washed with physiological saline and were examined for GERD. The whole plant extract of E. hirta in doses of 50, 100, and 200 mg/kg were administered orally twice daily at 10:00 and 16:00 hours, respectively, for 5 days and kaempferol (100 mg/kg) or omeprazole (OMZ) in the dose of 30 mg/kg 1 hour prior to the induction of GERD. Control groups received suspension of 1% carboxymethyl cellulose in distilled water (10 mL/kg). RESULTS The levels of gastric wall mucus increased and of plasma histamine and H+, K+ ATPase significantly decreased in groups treated by both the plant extract and flavonoids. Both the plant extract and flavonoids reduced the lipid peroxidation and superoxide dismutase and increased the levels of catalase and reduced glutathione. CONCLUSIONS The whole plant extract of E. hirta is attributed to its antisecretory, gastroprotective, and antioxidant potential as that of quercetin, rutin, kaempferol, and proton pump blocker (omeprazole) to treat GERD. SUMMARY The aqueous extract of whole plant of Euphorbia hirta revealed the presence of kaempferol (0.0256%), quercetin (0.0557%), and rutin (0.0151%), and the ethyl acetate fraction of whole plant of E. hirta possesses kaempferol (0.0487%), quercetin (0.0789%), and rutin (0.0184%).The levels of gastric wall mucus increased and of plasma histamine and H+-K+-ATPase significantly decreased in rats groups treated by both the whole plant extract of E. hirta and flavonoids.Both the whole plant extract of E. hirta and flavonoids reduced the lipid peroxidation and superoxide dismutase and increased the levels of catalase and reduced glutathione in rats groups. Abbreviation used: 1HNMR: Proton Nuclear Magnetic Resonance Spectroscopy, CAT: Catalase, EHAE: Aqueous extract of Euphorbia hirta, EHEF: Ethyl Acetate Fractions of Euphorbia hirta, GERD: Gastroesophageal reflux disease, GSH: Reduced Glutathione, HPLC: High performance liquid chromatography, IR: Infrared spectroscopy, LPO: Lipid Peroxidase, MDA: Malondialdehyde, MS: Mass Spectroscopy, OMZ: Omeprazole, ROS: Reactive Oxygen Species, SOD: Superoxide dismutase, TBHQ: tert-Butylhydroquinone, TLC: Thin Layer Chromatography, UV: Ultraviolet, UV: Ultraviolet-Visible Spectroscopy.
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Affiliation(s)
- Shyam Sundar Gupta
- Pharmacognosy and Ethnopharmacology Division, CSIR-National Botanical Research Institute, Uttar Pradesh, India
| | - Lubna Azmi
- Pharmacognosy and Ethnopharmacology Division, CSIR-National Botanical Research Institute, Uttar Pradesh, India
| | - P K Mohapatra
- Department of Botany, Ravenshaw University, Cuttack, Orissa, India
| | - Ch V Rao
- Pharmacognosy and Ethnopharmacology Division, CSIR-National Botanical Research Institute, Uttar Pradesh, India
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19
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Pitchaiah KC, Sivaraman N, Joseph M, Mohapatra PK, Madras G. Solubility of tri-iso-amyl phosphate in supercritical carbon dioxide and its application to selective extraction of uranium. SEP SCI TECHNOL 2017. [DOI: 10.1080/01496395.2017.1287737] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- K. C. Pitchaiah
- Chemistry Group, Indira Gandhi Centre for Atomic Research, HBNI, Kalpakkam, India
| | - N. Sivaraman
- Chemistry Group, Indira Gandhi Centre for Atomic Research, HBNI, Kalpakkam, India
| | - M. Joseph
- Chemistry Group, Indira Gandhi Centre for Atomic Research, HBNI, Kalpakkam, India
| | - P. K. Mohapatra
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, India
| | - Giridhar Madras
- Department of Chemical Engineering, Indian Institute of Science, Bangalore, India
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20
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Prabhu DR, Ansari SA, Raut DR, Murali MS, Mohapatra PK. Extraction behaviour of dioxouranium(VI) cation by two phosphorous-based liquid cation-exchangers in room-temperature ionic liquids. SEP SCI TECHNOL 2017. [DOI: 10.1080/01496395.2017.1282963] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- D. R. Prabhu
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai, India
| | - S. A. Ansari
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai, India
| | - D. R. Raut
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai, India
| | - M. S. Murali
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai, India
| | - P. K. Mohapatra
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai, India
- Homi Bhabha National Institute, Anushaktinagar, Mumbai, India
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21
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Mukherjee B, Kaushik N, Tripathi RPN, Joseph AM, Mohapatra PK, Dhar S, Singh BP, Kumar GVP, Simsek E, Lodha S. Exciton Emission Intensity Modulation of Monolayer MoS 2 via Au Plasmon Coupling. Sci Rep 2017; 7:41175. [PMID: 28134260 PMCID: PMC5278406 DOI: 10.1038/srep41175] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [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: 09/28/2016] [Accepted: 12/16/2016] [Indexed: 01/13/2023] Open
Abstract
Modulation of photoluminescence of atomically thin transition metal dichalcogenide two-dimensional materials is critical for their integration in optoelectronic and photonic device applications. By coupling with different plasmonic array geometries, we have shown that the photoluminescence intensity can be enhanced and quenched in comparison with pristine monolayer MoS2. The enhanced exciton emission intensity can be further tuned by varying the angle of polarized incident excitation. Through controlled variation of the structural parameters of the plasmonic array in our experiment, we demonstrate modulation of the photoluminescence intensity from nearly fourfold quenching to approximately threefold enhancement. Our data indicates that the plasmonic resonance couples to optical fields at both, excitation and emission bands, and increases the spontaneous emission rate in a double spacing plasmonic array structure as compared with an equal spacing array structure. Furthermore our experimental results are supported by numerical as well as full electromagnetic wave simulations. This study can facilitate the incorporation of plasmon-enhanced transition metal dichalcogenide structures in photodetector, sensor and light emitter applications.
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Affiliation(s)
- B. Mukherjee
- Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai, Maharashtra 400076, India
| | - N. Kaushik
- Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai, Maharashtra 400076, India
| | - Ravi P. N. Tripathi
- Photonics and Optical Nanoscopy Laboratory, Physics Division and Center for Energy Science, h-cross, Indian Institute of Science Education and Research, Pune 411008, India
| | - A. M. Joseph
- Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai, Maharashtra 400076, India
| | - P. K. Mohapatra
- Department of Physics, Indian Institute of Technology Bombay, Mumbai, Maharashtra 400076, India
| | - S. Dhar
- Department of Physics, Indian Institute of Technology Bombay, Mumbai, Maharashtra 400076, India
| | - B. P. Singh
- Department of Physics, Indian Institute of Technology Bombay, Mumbai, Maharashtra 400076, India
| | - G. V. Pavan Kumar
- Photonics and Optical Nanoscopy Laboratory, Physics Division and Center for Energy Science, h-cross, Indian Institute of Science Education and Research, Pune 411008, India
| | - E. Simsek
- Department of Electrical and Computer Engineering, School of Engineering and Applied Science, The George Washington University, Washington, D.C. 20052, USA
| | - S. Lodha
- Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai, Maharashtra 400076, India
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22
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Mohapatra PK, Ansari SA, Raut DR, Das D, Chaudhari CV, Bhardwaj YK, Lakshmi DS, Figoli A, Tasselli F. Evaluation of radiation resistance of hollow fibers for possible application in radioactive waste treatment. J Radioanal Nucl Chem 2016. [DOI: 10.1007/s10967-016-5072-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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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23
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Panda BB, Badoghar AK, Sekhar S, Shaw BP, Mohapatra PK. 1-MCP treatment enhanced expression of genes controlling endosperm cell division and starch biosynthesis for improvement of grain filling in a dense-panicle rice cultivar. Plant Sci 2016; 246:11-25. [PMID: 26993232 DOI: 10.1016/j.plantsci.2016.02.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [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: 10/16/2015] [Revised: 12/29/2015] [Accepted: 02/05/2016] [Indexed: 06/05/2023]
Abstract
High ethylene production in dense-panicle rice cultivars impacts grain filling. 1-MCP (ethylene action inhibitor) treatment increased assimilates partitioning, cell number and size and expression of starch synthesizing enzyme genes of developing caryopses mostly in the basal spikelets of panicle at early post-anthesis stage. The gain in cell number was less compared to the increase of size. High ethylene production in spikelets matched with greater expression of ethylene receptor and signal transducer genes. Genes encoding cell cycle regulators CDK, CYC and CKI expressed poorly on 9 DAA. 1-MCP treatment enhanced their expression; the increase of expression was higher for CDKs and lower for CKIs in basal compared to apical spikelets. Greater expression of CDKB2:1 might have lifted cytokinesis of nascent peripheral cells of endosperm, while promotion of CDKAs, CYCD2:2 and inhibition of CYCB2:2 expression contributed to endoreduplication of central cells increasing cell size and DNA ploidy level. It is concluded that the process of endoreduplication, which begins at mid-grain filling stage, is crucially linked with the final caryopsis size of rice grain. The enhanced endosperm growth brought about by repressed ethylene action during the first few days after anthesis seems to be associated with the overall increased cell cycle activity and sink strength.
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Affiliation(s)
- B B Panda
- Environmental Biotechnology Laboratory, Institute of Life Sciences, Bhubaneswar 751023, India
| | - A K Badoghar
- Environmental Biotechnology Laboratory, Institute of Life Sciences, Bhubaneswar 751023, India
| | - S Sekhar
- Environmental Biotechnology Laboratory, Institute of Life Sciences, Bhubaneswar 751023, India
| | - B P Shaw
- Environmental Biotechnology Laboratory, Institute of Life Sciences, Bhubaneswar 751023, India
| | - P K Mohapatra
- School of Life Science, Sambalpur University, Jyoti Vihar, Sambalpur 768019, India.
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24
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Abstract
BACKGROUND Some people in Northeast India prepare rice-based alcoholic drinks in the household. People use these drinks in religious and social functions, and these are taken even in the presence of parents and elders. Easy access to illicit substances in industrial towns and lack of social inhibition for intake of homemade alcohol might increase the vulnerability of youth to these habits. OBJECTIVE To estimate the prevalence of alcoholic drink user among school-going adolescent students in an industrial town of Assam. MATERIALS AND METHODS A cross-sectional survey was designed to collect the data using a predesigned questionnaire. Personal interview was conducted to collect the data about pattern of alcohol use, type of alcoholic drinks they use, duration, and information about parents and peer. Data were analyzed using Epi-info 17 and Statistical Package for Social Sciences-17.0 (Chicago, USA, SPSS Inc.). RESULTS About 36% out of 1285 students have tasted/used homemade alcoholic drinks (HADs) and 12.3% used commercially available alcoholic drinks (CADs). Significantly higher numbers (P < 0.001) of adolescent students (≥15 years) used CAD in comparison to children (<15 years). However, the number of younger students was higher in using HAD. Minimum age at first experience of CAD was 7 years and that of HAD was 4 years; the duration varied from 1 to 8 years and 1-15 years, respectively. Parent's behavior of taking tobacco and/or alcohol influenced the habit of their children. Father's habit was found to be associated with male offspring's habit of taking CAD. About 16% of the students used one or more substances along with alcohol. CONCLUSION High percentage of adolescents in the industrial town of Assam use alcoholic drinks with a male preponderance. They taste alcoholic drinks at a very young age. Parent's indulgence in taking tobacco, alcohol, or both was found to influence higher intake by their offspring.
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Affiliation(s)
- Beauty Mahanta
- Department of Zoology, Duliajan College, Duliajan, Assam, India
| | - P K Mohapatra
- Regional Medical Research Centre for Northeast, Dibrugarh, Assam, India
| | - N Phukan
- Department of Zoology, Duliajan College, Duliajan, Assam, India
| | - J Mahanta
- Regional Medical Research Centre for Northeast, Dibrugarh, Assam, India
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25
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Ali SM, Pahan S, Bhattacharyya A, Mohapatra PK. Complexation thermodynamics of diglycolamide with f-elements: solvent extraction and density functional theory analysis. Phys Chem Chem Phys 2016; 18:9816-28. [DOI: 10.1039/c6cp00825a] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Optimized complexes of Lu3+ with TMDGA in 1 : 1, 1 : 2 and 1 : 3 stoichiometric ratios and plots of theoretically calculated stepwise binding energy.
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Affiliation(s)
- Sk. M. Ali
- Chemical Engineering Division
- Bhabha Atomic Research Centre
- Trombay
- India
| | - S. Pahan
- Process Developement Division
- Bhabha Atomic Research Centre
- Trombay
- India
| | - A. Bhattacharyya
- Radiochemistry Division Bhabha Atomic Research Centre
- Trombay
- India
| | - P. K. Mohapatra
- Radiochemistry Division Bhabha Atomic Research Centre
- Trombay
- India
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26
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Gujar RB, Ansari SA, Mohapatra PK, Leoncini A, Verboom W. Solid phase extraction of Am(III) and Cm(III) from acidic feeds using tetraethyl diglycolamide (TEDGA) in ionic liquid. J Radioanal Nucl Chem 2015. [DOI: 10.1007/s10967-015-4655-7] [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: 11/29/2022]
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27
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Panda BB, Badoghar AK, Das K, Panigrahi R, Kariali E, Das SR, Dash SK, Shaw BP, Mohapatra PK. Compact panicle architecture is detrimental for growth as well as sucrose synthase activity of developing rice kernels. Funct Plant Biol 2015; 42:875-887. [PMID: 32480730 DOI: 10.1071/fp14363] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Accepted: 05/29/2015] [Indexed: 06/11/2023]
Abstract
The increase of spikelet number in the panicles of modern super rice has made the architecture compact, as the extra spikelets are accommodated mostly on secondary branches than on primary branches. However, the grain yield did not improve because of poor grain filling, which was more visible in the basal spikelets than apical spikelets. The objective of this study was to examine the effect of the compactness and positional difference of spikelets in the panicle on grain filling by comparing the activity and genetic expression of starch synthesising enzymes in the developing kernels of lax-(Upahar and CR3856-45-11-2-7-2-5 (CR-45)) and compact-(Mahalaxmi and CR3856-29-14-2-1-1-1 (CR-29)) panicle cultivars. Upahar and Mahalaxmi are genetically related, whereas CR-45 and CR-29 are recombinant inbred lines. The grain carbohydrate concentration and activity of sucrose synthase (SUS) enzyme were estimated during the active period of grain filling. Further, expression of isoforms of SUS, ADP glucose pyrophosphorylase (APL and APS for large and small units respectively) and starch synthase (SS and GBSS for soluble and granule bound starch synthases respectively) were also assayed through PCR studies. The genotype approach used revealed grain SUS activity and starch concentration high and sugar concentration low in the lax- compared with compact-panicle cultivars and in the apical spikelets compared with basal ones. The margin of variation between apical and basal spikelets was higher in the compact- than the lax-panicle cultivars. Genetic expression of most of the isoforms of the enzymes was higher in the lax- than the compact-panicle cultivars as seen in RT-PCR studies. A quantitative appraisal of transcript levels of isoforms in the qRT-PCR identified greater expression of SUS3 in the basal spikelets of Upahar than that in Mahalaxmi and in CR-45 over CR-29, most prominently during the active period of grain filling. We conclude that proximal location as well as increased density of spikelets on panicles affected SUS3 expression in the basal spikelets. The metabolic dominance of a spikelet in rice panicle is dependent on the expression of the genes for different isoforms of starch synthesising enzymes, but the expression of SUS3 could be more specific than the others. SUS3 expression is most active during grain filling of the lax-panicle cultivars, but its dominance is reduced significantly in the kernels of the compact-panicle cultivars.
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Affiliation(s)
- B B Panda
- Institute of Life Science, Nalco Square, Bhubaneswar 751023, India
| | - A K Badoghar
- Institute of Life Science, Nalco Square, Bhubaneswar 751023, India
| | - K Das
- Institute of Life Science, Nalco Square, Bhubaneswar 751023, India
| | - R Panigrahi
- School of Life Science, Sambalpur University, Jyoti vihar, Sambalpur 768019, India
| | - E Kariali
- School of Life Science, Sambalpur University, Jyoti vihar, Sambalpur 768019, India
| | - S R Das
- Department of Plant Breeding and Genetics, Orissa University of Agriculture and Technology, Bhubaneswar 751003, India
| | - S K Dash
- Crop Improvement Division, Central Rice Research Institute, Cuttack 753006, India
| | - B P Shaw
- Institute of Life Science, Nalco Square, Bhubaneswar 751023, India
| | - P K Mohapatra
- School of Life Science, Sambalpur University, Jyoti vihar, Sambalpur 768019, India
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28
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Sarma NP, Singh S, Sarma DK, Bhattacharyya DR, Kalita MC, Mohapatra PK, Dohutia C, Mahanta J, Prakash A. Mitochondrial DNA-based genetic diversity of Anopheles nivipes in North East India. Mitochondrial DNA A DNA Mapp Seq Anal 2015; 27:4236-4239. [PMID: 25812055 DOI: 10.3109/19401736.2015.1022757] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Malaria is a major public health problem in north-east India mainly transmitted by Anopheles baimai and An. minimus while Anopheles nivipes plays an important supportive role. The genetic diversity of An. nivipes in north-east India was investigated by employing two mitochondrial DNA markers namely NADH dehydrogenase 5 (ND5) and cytochrome oxidase sub unit II (COII). High genetic diversity in An. nivipes was observed by the detection of 16 haplotypes among 30 sequences of ND5 gene and 29 haplotypes among 29 COII sequences. Anopheles nivipes of north-east India was significantly differentiated genetically with that of neighboring South-east Asian An. nivipes as revealed by pairwise FST values of 0.127 (p < 0.01) and 0.044 (p < 0.001) for ND5 and COII genes, respectively, suggesting geographical barriers to gene flow in this species between the two geographical areas resulting in significant population structuring.
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Affiliation(s)
- N P Sarma
- a Regional Medical Research Centre, NE (Indian Council of Medical Research) , Dibrugarh , Assam , India
| | - S Singh
- a Regional Medical Research Centre, NE (Indian Council of Medical Research) , Dibrugarh , Assam , India.,b IDSP Office , Tinsukia , Assam , India
| | - D K Sarma
- a Regional Medical Research Centre, NE (Indian Council of Medical Research) , Dibrugarh , Assam , India
| | - D R Bhattacharyya
- a Regional Medical Research Centre, NE (Indian Council of Medical Research) , Dibrugarh , Assam , India
| | - M C Kalita
- c Department of Biotechnology , Gauhati University , Guwahati , Assam , India , and
| | - P K Mohapatra
- a Regional Medical Research Centre, NE (Indian Council of Medical Research) , Dibrugarh , Assam , India
| | - C Dohutia
- a Regional Medical Research Centre, NE (Indian Council of Medical Research) , Dibrugarh , Assam , India
| | - J Mahanta
- a Regional Medical Research Centre, NE (Indian Council of Medical Research) , Dibrugarh , Assam , India
| | - A Prakash
- a Regional Medical Research Centre, NE (Indian Council of Medical Research) , Dibrugarh , Assam , India.,d Laboratory Division , National Institute for Research in Environmental Health (Indian Council of Medical Research) , Bhopal , MP , India
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29
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Mahanty BN, Mohapatra PK, Raut DR, Das DK, Behere PG, Afzal M. Polymer Inclusion Membranes Containing N,N,N′,N′-Tetra(2-ethylhexyl) Diglycolamide: Uptake Isotherm and Actinide Ion Transport Studies. Ind Eng Chem Res 2015. [DOI: 10.1021/ie504713r] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- B. N. Mahanty
- Advanced
Fuel Fabrication Facility, Bhabha Atomic Research Centre, Tarapur, Maharashtra − 401502, India
| | - P. K. Mohapatra
- Radiochemistry
Division, Bhabha Atomic Research Centre, Trombay, Mumbai − 400085, India
| | - D. R. Raut
- Radiochemistry
Division, Bhabha Atomic Research Centre, Trombay, Mumbai − 400085, India
| | - D. K. Das
- Advanced
Fuel Fabrication Facility, Bhabha Atomic Research Centre, Tarapur, Maharashtra − 401502, India
| | - P. G. Behere
- Advanced
Fuel Fabrication Facility, Bhabha Atomic Research Centre, Tarapur, Maharashtra − 401502, India
| | - Md. Afzal
- Advanced
Fuel Fabrication Facility, Bhabha Atomic Research Centre, Tarapur, Maharashtra − 401502, India
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Dohutia C, Bhattacharyya DR, Sharma SK, Mohapatra PK, Bhattacharjee K, Gogoi K, Gogoi P, Mahanta J, Prakash A. Larvicidal activity of few select indigenous plants of North East India against disease vector mosquitoes (Diptera: Culicidae). Trop Biomed 2015; 32:17-23. [PMID: 25801251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Mosquitoes are the vectors of several life threatening diseases like dengue, malaria, Japanese encephalitis and lymphatic filariasis, which are widely present in the north-eastern states of India. Investigations on five local plants of north-east India, selected on the basis of their use by indigenous communities as fish poison, were carried out to study their mosquito larvicidal potential against Anopheles stephensi (malaria vector), Stegomyia aegypti (dengue vector) and Culex quinquefasciatus (lymphatic filariasis vector) mosquitoes. Crude Petroleum ether extracts of the roots of three plants viz. Derris elliptica, Linostoma decandrum and Croton tiglium were found to have remarkable larvicidal activity; D. elliptica extract was the most effective and with LC50 value of 0.307 μg/ml its activity was superior to propoxur, the standard synthetic larvicide. Half-life of larvicidal activity of D. elliptica and L. decandrum extracts ranged from 2-4 days.
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Affiliation(s)
- C Dohutia
- Regional Medical Research Centre, NE (Indian Council of Medical Research), Post Box no. 105, Dibrugarh - 786 001, Assam, India
| | - D R Bhattacharyya
- Regional Medical Research Centre, NE (Indian Council of Medical Research), Post Box no. 105, Dibrugarh - 786 001, Assam, India
| | - S K Sharma
- Regional Medical Research Centre, NE (Indian Council of Medical Research), Post Box no. 105, Dibrugarh - 786 001, Assam, India
| | - P K Mohapatra
- Regional Medical Research Centre, NE (Indian Council of Medical Research), Post Box no. 105, Dibrugarh - 786 001, Assam, India
| | - K Bhattacharjee
- Regional Medical Research Centre, NE (Indian Council of Medical Research), Post Box no. 105, Dibrugarh - 786 001, Assam, India
| | - K Gogoi
- Regional Medical Research Centre, NE (Indian Council of Medical Research), Post Box no. 105, Dibrugarh - 786 001, Assam, India
| | - P Gogoi
- D.R. College, Golaghat-785 621, Assam, India
| | - J Mahanta
- Regional Medical Research Centre, NE (Indian Council of Medical Research), Post Box no. 105, Dibrugarh - 786 001, Assam, India
| | - A Prakash
- Regional Medical Research Centre, NE (Indian Council of Medical Research), Post Box no. 105, Dibrugarh - 786 001, Assam, India
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Kanekar AS, Pathak PN, Mohapatra PK. Supercritical Fluid Dissolution and Extraction of Trivalent Metal Cations from Different Matrices. SEP SCI TECHNOL 2015. [DOI: 10.1080/01496395.2014.973522] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Pathak PN, Prabhu DR, Kumari N, Mohapatra PK. Studies on the Extraction of Actinides Using a Solvent Containing D2EHiBA in Room Temperature Ionic Liquids: Unusual Extraction of the Tetravalent Ions. SEP SCI TECHNOL 2015. [DOI: 10.1080/01496395.2014.973521] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Kumari N, Verma PK, Pathak PN, Gupta A, Ballal A, Aswal VK, Mohapatra PK. Extractant mediated nano-aggregate formation in Triton X-114 aided cloud formation: structural insights from TEM and SANS studies. RSC Adv 2015. [DOI: 10.1039/c5ra18546g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Nanoaggregate formation by self assembly was noticed during the cloud formation of Triton X-114 in the presence of dibenzoylmethane (DBM), thenoyltrifluoroacetone (HTTA) and 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone (PMBP) and tributyl phosphate (TBP).
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Affiliation(s)
- N. Kumari
- Radiochemistry Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - P. K. Verma
- Radiochemistry Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - P. N. Pathak
- Radiochemistry Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - A. Gupta
- Molecular Biology Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - A. Ballal
- Molecular Biology Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - V. K. Aswal
- Solid State Physics Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - P. K. Mohapatra
- Radiochemistry Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
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Bhattacharyya A, Ansari SA, Gadly T, Ghosh SK, Mohapatra M, Mohapatra PK. A remarkable enhancement in Am3+/Eu3+selectivity by an ionic liquid based solvent containing bis-1,2,4-triazinyl pyridine derivatives: DFT validation of experimental results. Dalton Trans 2015; 44:6193-201. [DOI: 10.1039/c5dt00149h] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Different complexation behaviour in RTIL medium resulted in an enhancement in selectivity up to a few thousands with MeBTP.
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Affiliation(s)
| | - Seraj A. Ansari
- Radiochemistry Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - Trilochan Gadly
- Bioorganic Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - Sunil K. Ghosh
- Bioorganic Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - Manoj Mohapatra
- Radiochemistry Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - P. K. Mohapatra
- Radiochemistry Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
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Bhattacharyya DR, Rajavel AR, Mohapatra PK, Jambulingam P, Mahanta J, Prakash A. Faunal richness and the checklist of Indian mosquitoes (Diptera: Culicidae). cl 2014. [DOI: 10.15560/10.6.1342] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
A review of published studies revealed that the Indian mosquito fauna comprises 393 species in 49 genera and 41 subgenera. The subfamily Anophelinae contains 61 species in one genus followed by Culicinae with 332 species in 11 tribes and 48 genera. The tribe Aedini (subfamily Culicinae) contains the highest number of species (176 species in 33 genera and two groups of incertae sedis; i.e., “Aedes” sensu auctorum and “Ochlerotatus” sensu auctorum). With the recent taxonomic changes in tribe Aedini, the Indian mosquito genera have gone up from 22 to 49. Changes to the Indian Aedini fauna subsequent to the reclassification of tribe Aedini are discussed. A total of 31 species are currently recognized in India for transmitting various mosquito-borne agents of human diseases. A checklist for the Indian mosquito species is presented and the need for a comprehensive study is emphasized.
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Patil AB, Pathak PN, Shinde VS, Mohapatra PK. Synthesis and Evaluation ofN,N′-dimethyl-N,N′-dicyclohexyl-Malonamide (DMDCMA) as an Extractant for Actinides. SEP SCI TECHNOL 2014. [DOI: 10.1080/01496395.2014.943772] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Bhattacharyya A, Mohapatra PK. A Novel Solvent System Involving Terpyridine and Cyanex-301 for Am(III) and Eu(III) Separation from Weakly Acidic Feeds. SEP SCI TECHNOL 2014. [DOI: 10.1080/01496395.2014.940542] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Jagasia P, Mohapatra PK, Dhami PS, Gandhi PM, Wattal PK. Evaluation of Novel Solvent Systems Containing Calix-crown-6 Ligands in A Fluorinated Solvent for Cesium Extraction from Nitric Acidic Feeds. SEP SCI TECHNOL 2014. [DOI: 10.1080/01496395.2014.921203] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Sarma DK, Mohapatra PK, Bhattacharyya DR, Mahanta J, Prakash A. Genotyping of chloroquine resistant Plasmodium falciparum in wild caught Anopheles minimus mosquitoes in a malaria endemic area of Assam, India. Trop Biomed 2014; 31:557-561. [PMID: 25382483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We validated the feasibility of using Plasmodium falciparum, the human malaria parasite, DNA present in wild caught vector mosquitoes for the characterization of chloroquine resistance status. House frequenting mosquitoes belonging to Anopheles minimus complex were collected from human dwellings in a malaria endemic area of Assam, Northeast India and DNA was extracted from the head-thorax region of individual mosquitoes. Anopheles minimus complex mosquitoes were identified to species level and screened for the presence of Plasmodium sp. using molecular tools. Nested PCR-RFLP method was used for genotyping of P. falciparum based on K76T mutation in the chloroquine resistance transporter (pfcrt) gene. Three of the 27 wild caught An. minimus mosquitoes were harbouring P. falciparum sporozoites (positivity 11.1%) and all 3 were had 76T mutation in the pfcrt gene, indicating chloroquine resistance. The approach of characterizing antimalarial resistance of malaria parasite in vector mosquitoes can potentially be used as a surveillance tool for monitoring transmission of antimalarial drug resistant parasite strains in the community.
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Affiliation(s)
- D K Sarma
- Regional Medical Research Centre, NE Region (Indian Council of Medical Research), Post Box. No. 105, Dibrugarh - 786 001, Assam (India)
| | - P K Mohapatra
- Regional Medical Research Centre, NE Region (Indian Council of Medical Research), Post Box. No. 105, Dibrugarh - 786 001, Assam (India)
| | - D R Bhattacharyya
- Regional Medical Research Centre, NE Region (Indian Council of Medical Research), Post Box. No. 105, Dibrugarh - 786 001, Assam (India)
| | - J Mahanta
- Regional Medical Research Centre, NE Region (Indian Council of Medical Research), Post Box. No. 105, Dibrugarh - 786 001, Assam (India)
| | - A Prakash
- Regional Medical Research Centre, NE Region (Indian Council of Medical Research), Post Box. No. 105, Dibrugarh - 786 001, Assam (India)
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41
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Jagasia P, Mohapatra PK, Dhami PS, Patil AB, Adya VC, Sengupta A, Gandhi PM, Wattal PK. Studies on the radiolytic stability of newly developed solvent systems containing four calix-crown-6 ligands for radio-cesium recovery. J Radioanal Nucl Chem 2014. [DOI: 10.1007/s10967-014-3316-6] [Citation(s) in RCA: 10] [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: 10/25/2022]
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Vernekar PV, Jagdale YD, Patwardhan AW, Patwardhan AV, Ansari SA, Mohapatra PK. Non-Dispersive Solvent Extraction of Neodymium usingN,N,N’,N’-Tetraoctyl Diglycolamide (TODGA). SEP SCI TECHNOL 2014. [DOI: 10.1080/01496395.2014.891614] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Gujar RB, Pathak PN, Dhekane GB, Mohapatra PK. Extraction of some Hexavalent Actinide Ions from Nitric Acid Medium using Several Substituted Diglycolamides. Solvent Extraction and Ion Exchange 2014. [DOI: 10.1080/07366299.2014.926136] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Mahanty BN, Raut DR, Mohapatra PK, Das DK, Behere PG, Afzal M. Comparative evaluation of actinide ion uptake by polymer inclusion membranes containing TODGA as the carrier extractant. J Hazard Mater 2014; 275:146-153. [PMID: 24857898 DOI: 10.1016/j.jhazmat.2014.04.059] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [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: 12/04/2013] [Revised: 04/25/2014] [Accepted: 04/27/2014] [Indexed: 06/03/2023]
Abstract
Polymer inclusion membranes (PIM) containing TODGA (N,N,N',N'-tetra-n-octyl diglycolamide) were evaluated for the separation of actinide ions such as Am(3+), Pu(4+), UO2(2+) and Th(4+) from acidic feeds. The PIMs were prepared using cellulose triacetate (CTA) as the polymer matrix and 2-nitrophenyloctyl ether (NPOE) as the plasticizer along with the diglycolamide carrier extractants and were characterized by conventional techniques such as XRD, thermal analysis and AFM. The PIM composition was optimized by a series of studies which involved variation in the CTA, NPOE and carrier concentration which suggested 58% TODGA, 30% NPOE and 12% CTA to be optimum. The uptake studies were carried out using feed solutions containing varying concentrations of nitric acid and showed the trend: Am(3+)>Pu(4+)>Th(4+)>UO2(2+). Transport studies were carried out in a two-compartment cell where nitric acid concentration the feed was varied (1-3M) while the receiver compartment contained alpha-hydroxy-iso-butyric acid (AHIBA). The actinide ion transport efficiencies with TODGA containing PIMs followed the same trend as seen in the uptake studies. The AFM patterns of the PIMs changed when loaded with Eu(3+) carrier (used as a surrogate for Am(3+)) while the regenerated membranes have displayed comparable morphologies. Diffusion coefficient values were experimentally obtained from the transport studies and were found to be 8.89×10(-8) cm(2)/s for Am(3+) transport.
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Affiliation(s)
- B N Mahanty
- Advanced Fuel Fabrication Facility, Bhabha Atomic Research Centre, Tarapur, Maharashtra, 401502, India
| | - D R Raut
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
| | - P K Mohapatra
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India.
| | - D K Das
- Advanced Fuel Fabrication Facility, Bhabha Atomic Research Centre, Tarapur, Maharashtra, 401502, India
| | - P G Behere
- Advanced Fuel Fabrication Facility, Bhabha Atomic Research Centre, Tarapur, Maharashtra, 401502, India
| | - Md Afzal
- Advanced Fuel Fabrication Facility, Bhabha Atomic Research Centre, Tarapur, Maharashtra, 401502, India
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Verma PK, Kumari N, Pathak PN, Sadhu B, Sundararajan M, Aswal VK, Mohapatra PK. Investigations on preferential Pu(IV) extraction over U(VI) by N,N-dihexyloctanamide versus tri-n-butyl phosphate: evidence through small angle neutron scattering and DFT studies. J Phys Chem A 2014; 118:3996-4004. [PMID: 24815040 DOI: 10.1021/jp503037q] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Straight chain amide N,N-dihexyloctanamide (DHOA) has been found to be a promising alternative extractant to tri-n-butyl phosphate (TBP) for the reprocessing of irradiated uranium- and thorium-based fuels. Unlike TBP, DHOA displays preferential extraction of Pu(IV) over U(VI) at higher acidities (≥3 M HNO3) and poor extraction at lower acidities. Density functional theory (DFT) based calculations have been carried out on the structures and relative binding energies of U(VI) and Pu(IV) with the extractant molecules. These calculations suggest that the differential hardness of the two extractants is responsible for the preferential binding/complexation of TBP to uranyl, whereas the softer DHOA and the bulky nature of the extractant lead to stronger binding/complexation of DHOA to Pu(IV). In conjunction with quantum chemical calculations, small angle neutron scattering (SANS) measurements have also been performed for understanding the stoichiometry of the complex formed that leads to relatively lower extraction of Th(IV) (a model for Pu(IV)) as compared to U(VI) using DHOA and TBP as the extractants. The combined experimental and theoretical studies helped us to understand the superior complexation/extraction behavior of Pu(IV) over U(VI) with DHOA.
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Affiliation(s)
- P K Verma
- Radiochemistry Division, ‡Radiation Safety Systems Division, §Theoretical Chemistry Section, and ∥Solid State Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India
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Verma PK, Pathak PN, Mohapatra PK, Godbole SV, Kadam RM, Veligzhanin AA, Zubavichus YV, Kalmykov SN. Influences of different environmental parameters on the sorption of trivalent metal ions on bentonite: batch sorption, fluorescence, EXAFS and EPR studies. Environ Sci Process Impacts 2014; 16:904-915. [PMID: 24531276 DOI: 10.1039/c3em00563a] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The presence of long-lived radionuclides in natural aquatic systems is of great environmental concern in view of their possible migration into biospheres of mankind. Trivalent actinides such as (241/243)Am can contribute a great deal to radioactivity for several thousand years. This migration is significantly influenced by various factors such as pH, complexing ions present in aquatic environments, and the sorption of species involving radionuclides by sediments around water bodies. Clay minerals such as bentonite are known to be highly efficient in radionuclide retention and hence are suitable candidates for backfill materials. This study presents experimental results on the interaction of Eu(iii) and Gd(iii) (chemical analogs of Am(iii) and Cm(iii)) with bentonite clay under varying experimental conditions of contact time, pH, and the presence of complexing anions such as humic acid (HA) and citric acid (cit). The sorption of HA on bentonite decreased with increasing the pH from 2 to 8, which was attributed to electrostatic interactions between HA and the bentonite surfaces. The sorption of Eu(iii) on bentonite colloids showed marginal variation with pH (>95%). However, a decrease in Eu(iii) sorption was observed in the presence of HA beyond pH 5 due to the increased aqueous complexation of Eu(iii) with deprotonated HA in the aqueous phase. The complexation of Eu(iii) with citrate ions was studied using Time Resolved Laser induced Fluorescence Spectroscopy (TRLFS) to explain the sorption data. Extended X-ray absorption fine structure (EXAFS) and electron paramagnetic resonance (EPR) investigations were carried out to understand the local chemical environment surrounding Eu(iii) and Gd(iii) (EPR probe) sorbed on bentonite under different experimental conditions. Surface complexation modelling shows the predominant formation of ≡XOEu(+2) (silanol) up to pH < 7, and beyond which ≡YOEu(OH)(+) (aluminol) is responsible for the quantitative sorption of Eu(iii) onto bentonite in the studied pH range.
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Affiliation(s)
- P K Verma
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400 085, India.
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Kanekar AS, Pathak PN, Mohapatra PK. Online recovery of radiocesium from soil, cellulose and plant samples by supercritical fluid extraction employing crown ethers and calix-crown derivatives as extractants. J Radioanal Nucl Chem 2014. [DOI: 10.1007/s10967-014-3034-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Mohapatra PK, Raut DR, Iqbal M, Huskens J, Verboom W. Evaluation of several multiple diglycolamide-functionalized calix[4]arene ligands for the isolation of carrier free 90Y from 90Sr. Appl Radiat Isot 2014; 85:133-8. [PMID: 24434745 DOI: 10.1016/j.apradiso.2013.12.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Revised: 10/24/2013] [Accepted: 12/06/2013] [Indexed: 11/16/2022]
Abstract
Several diglycolamide-functionalized calix[4]arenes containing four and eight diglycolamide (DGA) moieties were evaluated for their relative extraction efficiencies towards Y(III) and Sr(II). Ligands containing four DGA units with n-propyl, iso-pentyl, and n-octyl groups at the amidic N atom adjacent to the calix[4]arene skeleton showed efficient extraction of Y(III) from 3M HNO3. The extraction of Sr(II) was poor in all cases in the entire acidity range (0.1-6M HNO3) studied. The ligands with a hydrogen atom and an n-propyl group at the concerning amidic N atom showed a very high separation efficiency as reflected in separation factor (S.F.=DY/DSr) values in the range of 10(5)-10(6). A method was developed for the separation of carrier-free (90)Y from a (90)Y-(90)Sr mixture involving consecutive extraction-stripping cycles. The product purity was checked using half-life measurements. Two consecutive cycles of extraction and stripping were found to be sufficient for obtaining pure (90)Y. The results obtained in the present studies were compared with those obtained previously using analogous ligands such as TODGA (N,N,N',N'-tetraoctyl diglycolamide), T2EHDGA (N,N,N',N'-tetra-2-ethylhexyl diglycolamide), and PC-88A (bis(2-ethylhexyl) phosphonic acid).
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Affiliation(s)
- P K Mohapatra
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India.
| | - D R Raut
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India
| | - M Iqbal
- Laboratory of Molecular Nanofabrication, MESA(+) Institute for Nanotechnology, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
| | - J Huskens
- Laboratory of Molecular Nanofabrication, MESA(+) Institute for Nanotechnology, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
| | - W Verboom
- Laboratory of Molecular Nanofabrication, MESA(+) Institute for Nanotechnology, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
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Ansari SA, Gujar RB, Prabhu DR, Pathak PN, Mohapatra PK. Comparative Evaluation of CMPO and Diglycolamide Based Solvent Systems for Actinide Partitioning in Mixer-Settler Runs Using Tracer-Spiked PHWR Simulated High Level Waste. Solvent Extraction and Ion Exchange 2013. [DOI: 10.1080/07366299.2013.833743] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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50
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Jagdale YD, Vernekar PV, Patwardhan AW, Patwardhan AV, Ansari SA, Mohapatra PK, Manchanda VK. Mathematical Model for the Extraction of Metal Ions using Hollow Fiber Supported Liquid Membrane Operated in a Recycling Mode. SEP SCI TECHNOL 2013. [DOI: 10.1080/01496395.2013.807830] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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