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Sinha S, Nair V, Das I, Saha A, Bhowmick D, Pal M, Mehta DN. Efficacy of Laser-assisted Periodontal Therapy vs. Conventional Scaling and Root Planing. J Pharm Bioallied Sci 2024; 16:S492-S494. [PMID: 38595340 PMCID: PMC11001023 DOI: 10.4103/jpbs.jpbs_826_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 09/05/2023] [Accepted: 09/06/2023] [Indexed: 04/11/2024] Open
Abstract
Background This study aimed to compare the effectiveness of laser-assisted periodontal therapy (LAPT) with conventional scaling and root planing (CSRP) in the treatment of periodontal disease. The objective was to assess the outcomes of these two treatments on a sample of 30 patients in each group. Materials and Methods In this study, a total of 60 patients diagnosed with periodontal disease were divided into two groups: the LAPT group and the CSRP group, with 30 patients in each group. The LAPT group received periodontal treatment using laser therapy, while the SRP group underwent traditional SRP. The patients were evaluated for periodontal parameters, including probing depth and clinical attachment level before and after the treatments. Results After the treatment interventions, both the LAPT group and the CSRP group showed significant improvements in periodontal health. The mean reduction in probing depth was 2.5 mm in the LAPT group and 2.2 mm in the SRP group. In addition, the clinical attachment level increased by 2.8 mm in the LAPT group and 2.5 mm in the SRP group. Statistical analysis using the paired t-test demonstrated a P-value of less than 0.05, indicating the significance of these improvements in both groups. Conclusion This study suggests that both LAP and CSRP are effective in improving periodontal health in patients with periodontal disease.
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Affiliation(s)
- Sachin Sinha
- Primary Health Centre Khusrupur, Patna, Bihar, India
| | - Vineet Nair
- Department of Periodontia, Dr. R Ahmed Dental College and Hospital, Kolkata, West Bengal, India
| | - Indrasri Das
- Department of Periodontia, Dr. R Ahmed Dental College and Hospital, Kolkata, West Bengal, India
| | - Arindam Saha
- Department of Dentistry, North Bengal Medical College and Hospital, Siliguri, West Bengal, India
| | - Debarati Bhowmick
- Department of Periodontia, Dr. R Ahmed Dental College and Hospital, Kolkata, West Bengal, India
| | - Moumita Pal
- Department of Periodontia, North Bengal Dental College and Hospital, Siliguri, West Bengal, India
| | - Dhaval N. Mehta
- Department of Oral Medicine and Radiology, Narsinbhai Patel Dental College and Hospital, Sankalchand Patel University, Visnagar, Gujarat, India
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Ghosh S, Nandi M, Pal S, Mukhopadhyay D, Chakraborty BC, Khatun M, Bhowmick D, Mondal RK, Das S, Das K, Ghosh R, Banerjee S, Santra A, Chatterjee M, Chowdhury A, Datta S. Natural killer cells contribute to hepatic injury and help in viral persistence during progression of hepatitis B e-antigen-negative chronic hepatitis B virus infection. Clin Microbiol Infect 2016; 22:733.e9-733.e19. [PMID: 27208430 DOI: 10.1016/j.cmi.2016.05.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [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: 02/10/2016] [Revised: 04/05/2016] [Accepted: 05/09/2016] [Indexed: 12/13/2022]
Abstract
Hepatitis B e-antigen negative (e(-)) chronic HBV infection (CHI) encompasses a heterogeneous clinical spectrum ranging from inactive carrier (IC) state to e(-) chronic hepatitis B (CHB), cirrhosis and hepatic decompensation. In the backdrop of dysfunctional virus-specific T cells, natural killer (NK) cells are emerging as innate effectors in CHI. We characterized CD3(-) CD56(+) NK cells in clinically well-defined, treatment-naive e(-) patients in IC, e(-)CHB or decompensated liver cirrhosis (LC) phase to appraise their role in disease progression. The NK cell frequencies increased progressively with disease severity (IC 8.2%, e(-)CHB 13.2% and LC 14.4%). Higher proportion of NK cells from LC/e(-)CHB expressed CD69, NKp46, NKp44, TRAIL and perforin, the last two being prominent features of CD56(bright) and CD56(dim) NK subsets, respectively. The frequencies of CD3(-) CD56(+) NK cells together with TRAIL(+) CD56(bright) and Perforin(+) CD56(dim) NK cells correlated positively with serum alanine transaminase levels in e(-)CHB/LC. K562 cell-stimulated NK cells from e(-)CHB/LC exhibited significantly greater degranulation but diminished interferon-γ production than IC. Further, Perforin(+) NK cell frequency inversely correlated with autologous CD4(+) T-cell count in e(-) patients and ligands of NK receptors were over-expressed in CD4(+) T cells from e(-)CHB/LC relative to IC. Co-culture of sorted CD56(dim) NK cells and CD4(+) T cells from e(-)CHB showed enhanced CD4(+) T-cell apoptosis, which was reduced by perforin inhibitor, concanamycin A, suggesting a possible perforin-dependent NK cell-mediated CD4(+) T-cell depletion. Moreover, greater incidence of perforin-expressing NK cells and decline in CD4(+) T cells were noticed intrahepatically in e(-)CHB than IC. Collectively, NK cells contribute to the progression of e(-)CHI by enhanced TRAIL- and perforin-dependent cytolytic activity and by restraining anti-viral immunity through reduced interferon-γ secretion and perforin-mediated CD4(+) T-cell lysis.
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Affiliation(s)
- S Ghosh
- Department of Hepatology and Centre for Liver Research, School of Digestive & Liver Diseases, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - M Nandi
- Department of Hepatology and Centre for Liver Research, School of Digestive & Liver Diseases, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - S Pal
- Department of Hepatology and Centre for Liver Research, School of Digestive & Liver Diseases, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - D Mukhopadhyay
- Department of Pharmacology, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - B C Chakraborty
- Department of Hepatology and Centre for Liver Research, School of Digestive & Liver Diseases, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - M Khatun
- Department of Hepatology and Centre for Liver Research, School of Digestive & Liver Diseases, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - D Bhowmick
- CU-BD Centre of Excellence for Nanobiotechnology, Centre for Research in Nanoscience and Nanotechnology, University of Calcutta, India
| | - R K Mondal
- Department of Hepatology and Centre for Liver Research, School of Digestive & Liver Diseases, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - S Das
- Department of Hepatology and Centre for Liver Research, School of Digestive & Liver Diseases, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - K Das
- Department of Hepatology and Centre for Liver Research, School of Digestive & Liver Diseases, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - R Ghosh
- Division of Gastrointestinal and Liver Pathology, School of Digestive & Liver Diseases, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - S Banerjee
- Department of Hepatology and Centre for Liver Research, School of Digestive & Liver Diseases, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - A Santra
- Department of Hepatology and Centre for Liver Research, School of Digestive & Liver Diseases, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - M Chatterjee
- Department of Pharmacology, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - A Chowdhury
- Department of Hepatology and Centre for Liver Research, School of Digestive & Liver Diseases, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - S Datta
- Department of Hepatology and Centre for Liver Research, School of Digestive & Liver Diseases, Institute of Post Graduate Medical Education and Research, Kolkata, India.
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Sarkar A, Chakrabarti M, Bhowmick D, Chakrabarti A, Ray SK, Rafaja D, Sanyal D. Defects in 6 MeV H+ irradiated hydrothermal ZnO single crystal. J Phys Condens Matter 2013; 25:385501. [PMID: 23988867 DOI: 10.1088/0953-8984/25/38/385501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The effect of 6 MeV H(+) irradiation on hydrothermally grown ZnO single crystal has been investigated using high resolution x-ray diffraction (HRXRD) and optical absorption (ultraviolet-visible) spectroscopy. The increase of the diffuse scattering in the reciprocal space maps measured using HRXRD indicates an increase of the point defect density upon irradiation. Within the penetration depth of x-rays of several micrometres, the defect density increased with increasing distance from the sample surface. On the other hand, the near band gap optical absorption became sharper for the irradiated crystal. This reflects enhanced band to band absorption and reduced sub-band gap absorption due to defects. Temperature dependent photoluminescence spectra of the pristine sample show negative thermal quenching (NTQ) of the luminescence which is due to the presence of two or more donor related defects. Upon irradiation, a single dominant donor bound transition can be found without any temperature induced NTQ. Enhancement of the band edge luminescence and reduction of the defect related luminescence is observed at 10 K. Such changes have been discussed in the light of the hydrogen present in the as-grown state of hydrothermal ZnO.
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Affiliation(s)
- A Sarkar
- Department of Physics, Bangabasi Morning College, 19 Rajkumar Chakraborty Sarani, Kolkata 700 009, India
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Naik V, Chakrabarti A, Bhattacharjee M, Karmakar P, Bandyopadhyay A, Bhattacharjee S, Dechoudhury S, Mondal M, Pandey HK, Lavanyakumar D, Mandi TK, Dutta DP, Kundu Roy T, Bhowmick D, Sanyal D, Srivastava SCL, Ray A, Ali MS. A gas-jet transport and catcher technique for on-line production of radioactive ion beams using an electron cyclotron resonance ion-source. Rev Sci Instrum 2013; 84:033301. [PMID: 23556809 DOI: 10.1063/1.4792594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Radioactive ion beams (RIB) have been produced on-line, using a gas-jet recoil transport coupled Electron Cyclotron Resonance (ECR) ion-source at the VECC-RIB facility. Radioactive atoms∕molecules carried through the gas-jet were stopped in a catcher placed inside the ECR plasma chamber. A skimmer has been used to remove bulk of the carrier gas at the ECR entrance. The diffusion of atoms∕molecules through the catcher has been verified off-line using stable isotopes and on-line through transmission of radioactive reaction products. Beams of (14)O (71 s), (42)K (12.4 h), (43)K (22.2 h), and (41)Ar (1.8 h) have been produced by bombarding nitrogen and argon gas targets with proton and alpha particle beams from the K130 cyclotron at VECC. Typical measured intensity of RIB at the separator focal plane is found to be a few times 10(3) particles per second (pps). About 3.2 × 10(3) pps of 1.4 MeV (14)O RIB has been measured after acceleration through a radiofrequency quadrupole linac. The details of the gas-jet coupled ECR ion-source and RIB production experiments are presented along with the plans for the future.
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Affiliation(s)
- V Naik
- Variable Energy Cyclotron Centre, Sector-1, Block-AF, Bidhan Nagar, Kolkata 700064, India.
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Sarkar A, Chakrabarti M, Sanyal D, Bhowmick D, Dechoudhury S, Chakrabarti A, Rakshit T, Ray SK. Photoluminescence and positron annihilation spectroscopic investigation on a H(+) irradiated ZnO single crystal. J Phys Condens Matter 2012; 24:325503-9. [PMID: 22790024 DOI: 10.1088/0953-8984/24/32/325503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Low temperature photoluminescence and room temperature positron annihilation spectroscopy have been employed to investigate the defects incorporated by 6 MeV H(+) ions in a hydrothermally grown ZnO single crystal. Prior to irradiation, the emission from donor bound excitons is at 3.378 eV (10 K). The irradiation creates an intense and narrow emission at 3.368 eV (10 K). The intensity of this peak is nearly four times that of the dominant near band edge peak of the pristine crystal. The characteristic features of the 3.368 eV emission indicate its origin as a 'hydrogen at oxygen vacancy' type defect. The positron annihilation lifetime measurement reveals a single component lifetime spectrum for both the unirradiated (164 ± 1 ps) and irradiated crystal (175 ± 1 ps). It reflects the fact that the positron lifetime and intensity of the new irradiation driven defect species are a little higher compared to those in the unirradiated crystal. However, the estimated defect concentration, even considering the high dynamic defect annihilation rate in ZnO, comes out to be ∼4 × 10(17) cm(-3) (using SRIM software). This is a very high defect concentration compared to the defect sensitivity of positron annihilation spectroscopy. A probable reason is the partial filling of the incorporated vacancies (positron traps), which in ZnO are zinc vacancies. The positron lifetime of ∼175 ps (in irradiated ZnO) is consistent with recent theoretical calculations for partially hydrogen-filled zinc vacancies in ZnO. Passivation of oxygen vacancies by hydrogen is also reflected in the photoluminescence results. A possible reason for such vacancy filling (at both Zn and O sites) due to irradiation has also been discussed.
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Affiliation(s)
- A Sarkar
- Department of Physics, Bangabasi Morning College, 19 Rajkumar Chakraborty Sarani, Kolkata 700 009, India
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Mistry S, Bhowmick D. Oral contraceptive pill induced periodontal endocrinopathies and its management: A case report. Eur J Dent 2012; 6:324-9. [PMID: 22904662 PMCID: PMC3420841] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The purpose of this article is to report a case of unusual oral contraceptive induced periodontal endocrinopathies and its treatment approach. A 32-year-old female patient, having fair oral hygiene, presented with painless, soft, diffuse gingival enlargement on severely compromised periodontium (⩾ 4 mm generalized alveolar bone loss and attachment loss). The patient had on oral contraceptive over five years that was discontinued six months ago. When the lesion was not reversed following withdrawal of the pill or by repeated non-surgical measures, biopsy was performed to establish the diagnosis that revealed microscopic findings similar to that seen in gingival enlargement in pregnancy. Pocket depth, tooth mobility and gingival enlargement were reduced remarkably following periodontal surgery. After surgical intervention, close follow-up for over three years revealed no evidence of recurrence of gingival enlargement and progressive attachment loss. We conclude that periodontal surgery, patient compliance and comprehensive maintenance care are effective to return healthy periodontal status in such conditions.
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Affiliation(s)
- Surajit Mistry
- Department of Periodontics, Dr. R. Ahmed Dental College & Hospital, Kolkata-700014, INDIA,Corresponding author: Dr. Surajit Mistry, Department of Periodontics, 114- A.J.C Bose Road, Dr. R. Ahmed Dental College & Hospital. Kolkata-700014, INDIA, Tel: +91 943 4477955,
| | - Debarati Bhowmick
- Department of Periodontics, Dr. R. Ahmed Dental College & Hospital, Kolkata-700014, INDIA
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Sarkar A, Chakrabarti M, Ray SK, Bhowmick D, Sanyal D. Positron annihilation lifetime and photoluminescence studies on single crystalline ZnO. J Phys Condens Matter 2011; 23:155801. [PMID: 21460421 DOI: 10.1088/0953-8984/23/15/155801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The room temperature positron annihilation lifetime for single crystalline ZnO has been measured as 164 ± 1 ps. The single component lifetime value is very close to but higher than the theoretically predicted value of ~154 ps. Photoluminescence study (at 10 K) indicates the presence of hydrogen and other defects, mainly acceptor related, in the crystal. Defects related to a lower open volume than zinc vacancies, presumably a complex with two hydrogen atoms, are the major trapping sites in the sample. The bulk positron lifetime in ZnO is expected to be a little less than 164 ps.
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Affiliation(s)
- A Sarkar
- Department of Physics, Bangabasi Morning College, 19 Rajkumar Chakraborty Sarani, Kolkata 700009, India
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Nayak B, Guleria S, Varma M, Tandon N, Aggarwal S, Bhowmick D, Agarwal SK, Mahajan S, Gupta S, Tiwari SC. Effect of bisphosphonates on bone mineral density after renal transplantation as assessed by bone mineral densitometry. Transplant Proc 2007; 39:750-2. [PMID: 17445589 DOI: 10.1016/j.transproceed.2007.01.065] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
INTRODUCTION Steroid-induced osteoporosis is a major problem after organ transplantation. There is considerable evidence that bisphosphonates are effective in decreasing osteoporosis. AIM This prospective study was carried out to see the effects of bisphosphonates on bone mineral density (BMD) after successful renal transplantation. MATERIAL AND METHODS Fifty consecutive patients of successful renal transplantation were randomized into two groups. Group A (n = 27) received 35 mg/wk of Alendronate for 6 months after transplantation. Group B (n = 23) did not receive Alendronate and served as a control. Both groups underwent a pretransplant baseline dual-energy X-ray absorptiometry (DEXA) scan of their hips and lumber spines. Both groups received oral calcium and vitamin D supplement. Both groups were matched for the regimen and dose of immunosuppressive drugs. BMD was measured at 3 months and 6 months after transplantation. RESULTS Both groups showed a decline in BMD in early months posttransplantation. However, the 6-month DEXA scans showed a significant rise in BMD in group A as compared to group B. CONCLUSION Bisphosphonates appear to have a beneficial effect on steroid-induced bone loss.
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Affiliation(s)
- B Nayak
- Department of Surgery, Endocrinology and Nephrology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
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Agarwal SK, Dash SC, Gupta S, Bhowmick D, Tiwari SC, Guleria S, Mehta SN. Routine upper gastrointestinal tract evaluation before renal transplantation - is it a must in all patients? Nephron Clin Pract 1999; 83:368. [PMID: 10575303 DOI: 10.1159/000045433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Wadhwa S, Anand P, Bhowmick D. Quantitative study of plasticity in the auditory nuclei of chick under conditions of prenatal sound attenuation and overstimulation with species specific and music sound stimuli. Int J Dev Neurosci 1999; 17:239-53. [PMID: 10452367 DOI: 10.1016/s0736-5748(99)00005-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Morphological effects of prenatal sound attenuation and sound overstimulation by species specific and music sounds on the brainstem auditory nuclei of chick have been evaluated quantitatively. Changes in length, volume, neuron number, size of neuronal nuclei and glial numbers of second and third order auditory nuclei, n. magnocellularis (NM) and n. laminaris (NL), were determined from thionine-stained serial sections of control and experimental groups on posthatch day 1 using stereological methods. Significant increase in volume of both auditory nuclei attributable to increase in length of nucleus, number and size of neurons, number of glia as well as neuropil was observed in response to both species specific and music overstimulation given during the critical period of development. The enhanced development of auditory nuclei in response to enriched environment prenatally indicates a positive effect of activity on neurons which may have clinical implications in addition to providing explanation for preference to auditory cues in the postnatal life. Reduction in neuron number with a small increase in proportion of cell nuclei of large size as well as an increase in glial numbers was seen in both NM and NL of the prenatally sound attenuated chicks. The increase in size of some neuronal nuclei may probably be evidence of enhanced synthesis of proteins involved in cell death or an attempt at recovery. The dissociated response of neurons and glia under sound attenuated and auditory stimulated conditions suggests that they are independently regulated by activity-dependent signals with glia also being under influence of other signals for a role in removal of dead cell debris.
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Affiliation(s)
- S Wadhwa
- Department of Anatomy, All India Institute of Medical Sciences, New Delhi.
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Abstract
The solubilities of methane, carbon dioxide, ethane, and propane have been determined experimentally at 1 atm partial pressure and 25°C in aqueous solutions of sodium dodecyl sulfate and cetyltrimethylammonium bromide. For this purpose a specially developed apparatus is used, which is relatively simple compared to those reported in the literature hitherto. Above the CMC, the solubility of each gas increases linearly with surfactant concentration indicating micellar solubilization. The degree of solubilization is greatest for propane and decreases in the order propane > ethane > carbon dioxide > methane. Both the length of the alkyl chain and the properties of the head-group region (i.e., the micelle-water interfacial tension) are observed to determine the intramicellar solubility. A method for estimating the solubilities is also proposed based on the rationale that the micellar phase may be represented by a droplet of a "model solvent" into which the solubilizate molecule dissolves as it would in a bulk solvent. The mixture of the solute species and the model solvent is assumed to behave as a regular solution. Accordingly, a characteristic solubility parameter is estimated for the model solvent from the interaction potential between two adjacent surfactant molecules in a micelle. The solubility computed using the regular solution approximation is further corrected for the Laplace pressure that acts across the curved micelle-water interface and generally reduces the intramicellar solubility. It is concluded that for small nonpolar solutes, micellar solubilities may be reasonably well predicted by assuming that the model solvent has a solubilizing capacity (i.e., solubility parameter) close to that of a bulk equivalent alkane. Copyright 1997 Academic Press. Copyright 1997Academic Press
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Affiliation(s)
- S Roy
- Department of Chemical Engineering, Indian Institute of Technology, Bombay, Bombay, 400 076, India
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Bhowmick D, Bandyopadhyay K, Ray AK, Sarkar U. Bounds on the Z' mass and mixing angles in the ununified gauge models. Phys Rev D Part Fields 1995; 51:2118-2124. [PMID: 10018682 DOI: 10.1103/physrevd.51.2118] [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: 05/23/2023]
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