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Krishna MS, Lenka S, Sridevi B, Rao NS, Rao DN, Sarma VVSS, Mithun GG, Prakash TA, Khalap ST, Satelkar NP, Siddharth G, Fernando V. Major sources of sinking particulate organic matter in the western Bay of Bengal. Mar Environ Res 2024; 197:106480. [PMID: 38564848 DOI: 10.1016/j.marenvres.2024.106480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 03/15/2024] [Accepted: 03/26/2024] [Indexed: 04/04/2024]
Abstract
Impacts of river discharge on coastal ocean processes are multi-dimensional. Studies on sinking particle fluxes, composition and their seasonal variability in coastal oceans are very limited. In this study, we investigated the impact of river discharge on seasonal variability in sinking fluxes of total mass, biogenic and lithogenic material in a river-dominated continental margin, western coastal Bay of Bengal. Higher POC, lithogenic and total mass fluxes were found during early southwest monsoon, and are decoupled with peak river discharge and elevated primary production. It is attributed to cross-shelf transport of re-suspended surface sediments from shelf region. Peak river discharge followed by elevated chlorophyll-a suggest nutrients supply though river discharge support primary production. Elemental C:N ratios, δ13C and δ15N results likely suggest that both marine and terrestrial sources contributed to sinking POM, . Overall, higher sinking fluxes during southwest monsoon than rest of the year suggest that seasonal river discharge exerts considerable impact on sinking fluxes in the western coastal Bay of Bengal.
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Affiliation(s)
- M S Krishna
- CSIR-National Institute of Oceanography, Regional Centre, Visakhapatnam, India, 530017.
| | - Sreenu Lenka
- CSIR-National Institute of Oceanography, Regional Centre, Visakhapatnam, India, 530017
| | - B Sridevi
- CSIR-National Institute of Oceanography, Regional Centre, Visakhapatnam, India, 530017
| | - N S Rao
- ESSO-Indian National Centre for Ocean Information Services, Hyderabad, 500090, India
| | - D N Rao
- CSIR-National Institute of Oceanography, Regional Centre, Visakhapatnam, India, 530017
| | - V V S S Sarma
- CSIR-National Institute of Oceanography, Regional Centre, Visakhapatnam, India, 530017
| | - G G Mithun
- CSIR-National Institute of Oceanography, Dona Paula, Goa, India, 403004
| | - T A Prakash
- CSIR-National Institute of Oceanography, Dona Paula, Goa, India, 403004
| | - S T Khalap
- CSIR-National Institute of Oceanography, Dona Paula, Goa, India, 403004
| | - N P Satelkar
- CSIR-National Institute of Oceanography, Dona Paula, Goa, India, 403004
| | - G Siddharth
- CSIR-National Institute of Oceanography, Dona Paula, Goa, India, 403004
| | - V Fernando
- CSIR-National Institute of Oceanography, Dona Paula, Goa, India, 403004
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Lenka S, Badapanda T, Nayak P, Sarangi S, Anwar S, Tripathy SN. Investigation of crystal structure and variable range hopping conduction mechanism in Gd doped Na0.5Bi0.5TiO3 ceramics. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2022.134413] [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: 11/06/2022]
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Swain H, Adak T, Mukherjee AK, Mukherjee PK, Bhattacharyya P, Behera S, Bagchi TB, Patro R, Shasmita, Khandual A, Bag M, Dangar T, Lenka S, Jena M. Novel Trichoderma strains isolated from tree barks as potential biocontrol agents and biofertilizers for direct seeded rice. Microbiol Res 2018; 214:83-90. [DOI: 10.1016/j.micres.2018.05.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 04/20/2018] [Accepted: 05/17/2018] [Indexed: 11/29/2022]
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Lenka NK, Jaiswal SP, Thakur JK, Lenka S, Mandal A, Dwivedi AK, Lakaria BL, Biswas AK, Shukla AK, Yashona DS. Soil Degradation Effect on Soil Productivity, Carbon Pools and Soil Enzyme Activity. CURR SCI INDIA 2017. [DOI: 10.18520/cs/v112/i12/2434-2439] [Citation(s) in RCA: 6] [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: 11/15/2022]
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Nayak U, Lenka S, Achappa B. Clinical and Socio demographic profile of attendees at ART centre in a tertiary care hospital in Mangalore, India. Asian J Med Sci 2015. [DOI: 10.3126/ajms.v6i5.11622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Introduction: India has the third largest number of people living with HIV/AIDS. There is a need to study the profile of patients who come to ART centers and link their clinical and socio-demographic variables in the management. Moreover, it is important to understand the presentation of HIV disease in the local context and culture. The present study is aimed at identifying the socio-demographic characteristics, clinical presentations of HIV/AIDS patients, opportunistic infections and the possible risk factors for acquiring HIV infection at an ART centre of Government Wenlock hospital, situated in Karnataka state of India. Materials and Methods: In this study 102 HIV patients attending the HIV clinic were enrolled and they were followed for a period of one year with relevant investigations.Results: Of 102 patients 69 were males and 33 were females.The mean age of the study subjects at the time of diagnosis was 38.06. Heterosexual contact was the commonest mode of transmission in96 (94.12%) patients. History suggestive of a risk factor for HIV transmission could not be elicited in 4 (3.92%) patients. Fever (71.5%), weight loss (62.74%), cough (51.96%) and chronic diarrhea (43.9%) were the common presenting symptoms. The most common opportunistic infection was oral candidiasis (66.67%) followed bytuberculosis (22.54%) and pneumocystis pneumonia (13.72%). Significant number of patients (30.37%) developed Zidovudine induced anemia and females were more prone for Zidovudine induced anemia as compared to males. CD4 counts of the patients were significantly inversely correlated with the number of symptoms and the number of opportunistic infections. Conclusion: Majority of patients were of low socioeconomic status and in productive age group with heterosexual contact being commonest mode of transmission.Significant number of patients developed Zidovudine induced anemia and females were more prone. DOI: http://dx.doi.org/10.3126/ajms.v6i5.11622Asian Journal of Medical Sciences Vol.6(5) 2015 61-65
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Nayak P, Mishra DK, Sahoo KC, Pati NC, Jena PK, Lenka S, Nayak PL. Polymers from renewable resources. XIII. Interpenetrating polymer networks derived from castor oil-hexamethylene diisocyanate and polymethacrylamide. J Appl Polym Sci 2001. [DOI: 10.1002/app.1223] [Citation(s) in RCA: 13] [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: 11/05/2022]
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Bhunia H, Nando G, Basak A, Lenka S, Nayak P. Synthesis and characterization of polymers from cashewnut shell liquid (CNSL), a renewable resource III. Synthesis of a polyether. Eur Polym J 1999. [DOI: 10.1016/s0014-3057(98)00244-4] [Citation(s) in RCA: 26] [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: 11/26/2022]
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Bhunia H, Nando G, Chaki T, Basak A, Lenka S, Nayak P. Synthesis and characterization of polymers from cashewnut shell liquid (CNSL), a renewable resource II. Synthesis of polyurethanes. Eur Polym J 1999. [DOI: 10.1016/s0014-3057(98)00225-0] [Citation(s) in RCA: 72] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Mohapatra DK, Das D, Nayak PL, Lenka S. Polymers from renewable resources. XX. Synthesis, structure, and thermal properties of semi-interpenetrating polymer networks based on cardanol-formaldehyde-substituted aromatic compounds copolymerized resins and castor oil polyurethanes. J Appl Polym Sci 1998. [DOI: 10.1002/(sici)1097-4628(19981031)70:5<837::aid-app1>3.0.co;2-u] [Citation(s) in RCA: 11] [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: 11/07/2022]
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Mohapatra DK, Nayak PL, Lenka S. Polymers from renewable resources. XXI. Semi-interpenetrating polymer networks based on cardanol-formaldehyde-substituted aromatic compounds copolymerized resins and castor oil polyurethanes: Synthesis, structure, scanning electron microscopy and XRD. ACTA ACUST UNITED AC 1997. [DOI: 10.1002/(sici)1099-0518(19971115)35:15<3117::aid-pola4>3.0.co;2-t] [Citation(s) in RCA: 10] [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: 11/08/2022]
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Nayak P, Mishra DK, Parida D, Sahoo KC, Nanda M, Lenka S, Nayak PL. Polymers from renewable resources. IX. Interpenetrating polymer networks based on castor oil polyurethane poly(hydroxyethyl methacrylate): Synthesis, chemical, thermal, and mechanical properties. J Appl Polym Sci 1997. [DOI: 10.1002/(sici)1097-4628(19970131)63:5<671::aid-app15>3.0.co;2-x] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Mishra DK, Das SK, Nayak SS, Nayak PL, Lenka S. Polymers from Renewable Resources. Xiv. Interpenetrating Polymer Networks Derived from Castor Oil—Isophorone Diisocyanate-Polyacrylamide: Thermal, Scanning Electron Microscopy, and Xrd Studies. Journal of Macromolecular Science, Part A 1996. [DOI: 10.1080/10601329608019163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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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Das SK, Mishra DK, Das D, Nayak PL, Lenka S. Polymers from Renewable Resources. Xviii. Thermal Properties of the Interpenetrating Polymer Networks Derived from Castor Oil Based Polyurethane-4-Acetyl Phenyl Acrylate. Journal of Macromolecular Science, Part A 1996. [DOI: 10.1080/10601329608019164] [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: 10/26/2022]
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Mishra DK, Mishra BK, Lenka S, Nayak PL. Polymers from renewable resources. VII: Thermal properties of the semi-interpenetrating polymer networks composed of castor oil polyurethanes and cardanol-furfural resin. POLYM ENG SCI 1996. [DOI: 10.1002/pen.10493] [Citation(s) in RCA: 18] [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: 11/06/2022]
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Parida D, Lenka S, Nayak PL. Polymers from Renewable Resources. IV. Castor-Oil-Based Interpenetrating Polymer Networks Derived from Isophorone Diisocyanate Poly(Acrylamide) and Poly(Methacrylamide). Journal of Macromolecular Science, Part A 1995. [DOI: 10.1080/10601329508009362] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Parida D, Nayak P, Mishra DK, Lenka S, Nayak PL, Mohanty S, Rao KK. Polymers from renewable resources. VIII. Thermal properties of the interpenetrating polymer networks derived from castor oil–isophorone diisocyanate–polyacrylamides. J Appl Polym Sci 1995. [DOI: 10.1002/app.1995.070561304] [Citation(s) in RCA: 18] [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: 11/12/2022]
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Nayak SS, Mishra DK, Nayak PL, Lenka S. Polymers from Renewable Resources. Xi. Synthesis and Characterization of Thermosetting Resins Derived from Cardanyl Acrylate-Formaldehyde-Substituted Aromatic Compounds. Journal of Macromolecular Science, Part A 1995. [DOI: 10.1080/10601329508019196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Mishra DK, Parida D, Nayak SS, Lenka S, Nayak PL. Polymers from Renewable Resources. X. Semi-Interpenetrating Polymer Networks Based on Castor Oil Polyurethane and Cardanol-Furfural Resin: Scanning Electron Microscopy and XRD Studies. Journal of Macromolecular Science, Part A 1995. [DOI: 10.1080/10601329508019195] [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: 10/23/2022]
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Aich R, Lenka S, Nayak PL. Synthetic Resins. XXXV. Chelation Ion Exchange Properties of 2,4-Dinitrophenyl Hydrazone of Resacetophenone-Furfural Resin. J of Macromolecular Sc , Part A 1995. [DOI: 10.1080/10601329508020312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Swain SK, Sahoo S, Mohapatra DK, Mishra BK, Lenka S, Nayak PL. Polymers from renewable resources. V. Synthesis and characterization of thermosetting resins derived from cashew nut shell liquid (CNSL)–furfural-substituted aromatic compounds. J Appl Polym Sci 1994. [DOI: 10.1002/app.1994.070541005] [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: 11/06/2022]
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Sahoo SC, Nayak PL, Lenka S. Synthetic resins. XXXVI. Synthesis, characterization, and study of chelation ion-exchange properties of quinol-crotonaldehyde resin. J Appl Polym Sci 1994. [DOI: 10.1002/app.1994.070540822] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Aich R, Lenka S, Nayak PL. Synthetic resins XXIX: Synthesis and characterisation of the resins derived from 2,4-dinitrophenylhydrazone derivatives of resacetophenone-furfural-substituted hydroxy-aromatic compounds. POLYM INT 1994. [DOI: 10.1002/pi.1994.210340312] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Rath DK, Nayak PL, Lenka S. Synthetic resins. XIV. Chelation ion exchange properties of 2,4-dinitro phenylhydrazone of 2-hydroxy acetophenone–formaldehyde resin. J Appl Polym Sci 1994. [DOI: 10.1002/app.1994.070510919] [Citation(s) in RCA: 14] [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: 11/11/2022]
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Samal UK, Nayak PL, Lenka S. Synthetic resins. XXI. Ion-exchange properties of the resins derived from oximes of 2-hydroxy acetophenone-substituted benzoic acid–formaldehyde. J Appl Polym Sci 1993. [DOI: 10.1002/app.1993.070470801] [Citation(s) in RCA: 13] [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: 11/10/2022]
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Nayak PL, Lenka S, Panda SK, Pattnaik T. Polymers from renewable resources. I. Castor oil-based interpenetrating polymer networks: Thermal and mechanical properties. J Appl Polym Sci 1993. [DOI: 10.1002/app.1993.070470616] [Citation(s) in RCA: 39] [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: 11/07/2022]
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Parija A, Nayak PL, Lenka S. Synthetic resins. XIX. Chelation ion exchange properties of 2,4-dinitrophenyl hydrazone of quinacetophenone-formaldehyde resin. J Appl Polym Sci 1993. [DOI: 10.1002/app.1993.070470217] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Rath DK, Lenka S, Nayak PL. Synthetic resins. XVIII. Chelation ion exchange properties of 2,4-dinitrophenylhydrazone of 4-hydroxy acetophenone–formaldehyde resins. J Appl Polym Sci 1992. [DOI: 10.1002/app.1992.070461206] [Citation(s) in RCA: 12] [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: 11/05/2022]
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Bastia TK, Lenka S, Nayak PL. Synthetic resins. XX. Chelation ion exchange properties of resins derived from semicarbazone of 2-hydroxy acetophenone-substituted benzoic acid–formaldehyde. J Appl Polym Sci 1992. [DOI: 10.1002/app.1992.070460421] [Citation(s) in RCA: 11] [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: 11/07/2022]
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Nayak PL, Lenka S, Nayak PK. Calculation of reactivity ratio of resin copolymers derived from substituted acetophenones using Kelen–Tüdos equation. J Appl Polym Sci 1992. [DOI: 10.1002/app.1992.070450412] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Burma SPNS, Lenka S, Nayak PL. Synthetic resins. XIII. Synthesis and characterization of the resins derived from quinacetophenone/substituted benzoic acid/furfuraldehyde. J Appl Polym Sci 1992. [DOI: 10.1002/app.1992.070440801] [Citation(s) in RCA: 11] [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: 11/11/2022]
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Lenka S, Parija A, Nayak PL. Synthetic resins: XV. Chelation ion exchange properties of 2,4- dinitrophenylhydrazone of resacetophenone-formaldehyde resin. POLYM INT 1992. [DOI: 10.1002/pi.4990290207] [Citation(s) in RCA: 8] [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: 11/09/2022]
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Nayak PK, Lenka S, Nayak PL. Biomedical polymers. III. Bacteriocidal property of the resins derived from substituted acetophenones. J Appl Polym Sci 1991. [DOI: 10.1002/app.1991.070431223] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Samal S, Sahu G, Lenka S, Nayak PL. Photo-induced graft copolymerization XI. Graft copolymerization of methyl methacrylate onto silk using isoquinoline-sulphur dioxide charge-transfer complex as the initiator. J Appl Polym Sci 1987. [DOI: 10.1002/app.1987.070330538] [Citation(s) in RCA: 8] [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: 11/10/2022]
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Lenka S, Nayak PL, Dash SB, Ray S. Vinyl polymerization initiated by peroxydiphosphate. Colloid Polym Sci 1983. [DOI: 10.1007/bf01411515] [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: 10/25/2022]
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