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Nair SS, Ramesh C, Tashiro K. Crystalline Phases in Nylon-11: Studies Using HTWAXS and HTFTIR. Macromolecules 2006. [DOI: 10.1021/ma052597e] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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52
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Iyengar K, Jayan R, Ramesh C, Vinjamuri S. P36 Diagnosis of prosthetic joint infections: Role of 99mTc-sulesomab. Nucl Med Commun 2006. [DOI: 10.1097/00006231-200603000-00118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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53
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Gowd EB, Ramesh C. Effect of poly(ethylene glycol) on the solid-state polymerization of poly(ethylene terephthalate). POLYM INT 2006. [DOI: 10.1002/pi.1969] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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54
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Gowd EB, Ramesh C. Morphological consequences of interchange reactions during solid state copolymerization in poly(ethylene terephthalate) and polycarbonate oligomers. POLYMER 2005. [DOI: 10.1016/j.polymer.2005.05.075] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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55
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Ranganathan T, Bhoje Gowd E, Ramesh C, Kumar A. Main chain thermotropic liquid crystalline polyurethanes containing biphenyl mesogens based on novel AB-type self-polycondensation route: FT-IR and XRD studies. ACTA ACUST UNITED AC 2005. [DOI: 10.1002/pola.20668] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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56
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Nair SS, Ramesh C. Studies on the Crystallization Behavior of Nylon-6 in the Presence of Layered Silicates Using Variable Temperature WAXS and FTIR. Macromolecules 2004. [DOI: 10.1021/ma048860d] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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57
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Gowd EB, Ramesh C, Byrne MS, Murthy NS, Radhakrishnan J. Effect of molecular orientation on the crystallization and melting behavior in poly(ethylene terephthalate). POLYMER 2004. [DOI: 10.1016/j.polymer.2004.07.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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58
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Suhas S, Ganapathy KS, Gayatri Devi M, Ramesh C. Application of the micronucleus test to exfoliated epithelial cells from the oral cavity of beedi smokers, a high-risk group for oral cancer. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2004; 561:15-21. [PMID: 15238226 DOI: 10.1016/j.mrgentox.2004.03.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2003] [Revised: 01/04/2004] [Accepted: 03/04/2004] [Indexed: 11/18/2022]
Abstract
The primary sites for occurrence of oral cancer include the buccal mucosa, tongue, alveolus, palate, lip and the floor of the mouth. In this study, an attempt was made to estimate the cytogenetic damage in different regions of the oral mucosa in people habituated to smoking beedi,which is one of the major forms of tobacco consumption in India and believed to be a major risk factor for oral cancer. By using the micronucleus assay on exfoliated cells from the buccal mucosa, palate and tongue of beedi smokers, we examined an early cellular response to the effect of beedi smoking. A total number of 50 randomly selected male subjects were included in the study. Case and control groups (smokers and non-smokers, respectively) comprised 25 subjects each. The difference in mean micronucleated cell count between cases and controls was significant (P <0.01) for buccal mucosa and palate, but not for tongue. The correlation between age and micronucleus cell count was weak for both cases (r=0.27) and controls (r=0.36).
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James NR, Ramesh C, Sivaram S. Crystallization and solid-state polymerization of poly(aryl ester)s. POLYM INT 2004. [DOI: 10.1002/pi.1397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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60
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Ramesh C, Harakishore K, Murty U, Das B. Analogues of parthenin and their antibacterial activity. ARKIVOC 2004. [DOI: 10.3998/ark.5550190.0004.915] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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61
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Iyer S, Kulkarni GM, Ramesh C. Mizoroki–Heck reaction, catalysis by nitrogen ligand Pd complexes and activation of aryl bromides. Tetrahedron 2004. [DOI: 10.1016/j.tet.2003.12.012] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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62
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Ranganathan T, Ramesh C, Kumar A. Thermotropic liquid-crystalline polyesters containing biphenyl mesogens in the main chain: The effect of connectivity. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/pola.20109] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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63
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Das B, Srinivas KVNS, Mahender I, Ravindranath N, Ramesh C. A Convenient Method for the Preparation of 7-Cyanocamptothecins and 7-Cyanomappicine Ketones1. SYNTHETIC COMMUN 2004. [DOI: 10.1081/scc-120027253] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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64
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Ranganathan T, Ramesh C, Kumar A. Synthesis of new thermotropic liquid crystalline polyurethanes containing biphenyl mesogens using a novel AB-type self-polycondensation. Chem Commun (Camb) 2003:154-5. [PMID: 14737525 DOI: 10.1039/b312826a] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of thermotropic main chain liquid crystalline polyurethanes containing biphenyl mesogens and flexible methylene spacers were synthesized using the novel AB-type self-polycondensation approach for the first time.
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Ravindranath N, Ramesh C, Ravinder Reddy M, Das B. Selective Removal of
N
‐Boc Protecting Group from Aromatic Amines Using Silica Gel‐Supported Sodium Hydrogen Sulfate and HY‐Zeolite as Heterogeneous Catalysts
[1]. Adv Synth Catal 2003. [DOI: 10.1002/adsc.200303108] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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66
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Ramesh C, Ravindranath N, Das B, Prabhakar A, Bharatam J, Ravikumar K, Kashinatham A, McMorris TC. Pseudoguaianolides from the flowers of Parthenium hysterophorus. PHYTOCHEMISTRY 2003; 64:841-844. [PMID: 14559278 DOI: 10.1016/s0031-9422(03)00425-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Chemical investigation on the flowers of Parthenium hysterophorus has resulted in the isolation of four new pseudoguaianolides, hysterones A-D along with the known compounds, parthenin, coronopilin, 2beta-hydroxycoronopilin and tetraneurin-A. The structures of the new compounds were established by interpretation of their spectral (1D and 2D NMR) data. The X-ray crystallographic analysis of hysterones A and C was also carried out.
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Sandhya T, Ramesh C, Sivaram S. Copolyesters based on poly(butylene terephthalate)s containing cyclohexyl groups: synthesis, structure and crystallization. ACTA ACUST UNITED AC 2003. [DOI: 10.1002/masy.200350939] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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68
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Ramesh C, Ravindranath N, Das B. Simple, efficient, and selective deprotection of phenolic methoxymethyl ethers using silica-supported sodium hydrogen sulfate as a heterogeneous catalyst. J Org Chem 2003; 68:7101-3. [PMID: 12946158 DOI: 10.1021/jo030088+] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A simple and efficient method has been developed for chemoselective deprotection of phenolic methoxymethyl (MOM) ethers using silica-supported sodium hydrogen sulfate as a heterogeneous catalyst. The conversions occur at room temperature, and the yields of the deprotected phenols are excellent. The method is suitable for deprotection of phenolic MOM ethers of multifunctional bioactive natural products.
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69
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Gowd EB, Nair SS, Ramesh C, Tashiro K. Studies on the Clathrate (δ) Form of Syndiotactic Polystyrene Crystallized by Different Solvents Using Fourier Transform Infrared Spectroscopy. Macromolecules 2003. [DOI: 10.1021/ma034935m] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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70
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Mahender G, Ramu R, Ramesh C, Das B. A Simple and Facile Chemo- and Regioselective Deprotection of Acetonides Using Silica Supported Sodium Hydrogen Sulfate as a Heterogeneous Catalyst. CHEM LETT 2003. [DOI: 10.1246/cl.2003.734] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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71
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Venkataiah B, Ramesh C, Ravindranath N, Das B. Charminarone, a seco-pseudoguaianolide from Parthenium hysterophorus. PHYTOCHEMISTRY 2003; 63:383-386. [PMID: 12770584 DOI: 10.1016/s0031-9422(03)00147-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A novel sesquiterpenoid, charminarone, the first seco-pseudoguaianolide, has been isolated along with several known compounds from the whole plant of Parthenium hysterophorus. The structure of the new compound has been settled as 1,10-seco-dihydroisoparthenin 1,10-dione from its spectral data as well as from its conversion by reductive coupling reaction with Zn/TiCl(4) reagent to the known compound, anhydrodihydroisoparthenin. The reagent Zn/TiCl(4) has been used here for the first time to construct the seven membered ring of a pseudoguaianolide sesquiterpenoid.
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Devi UK, Bafna UD, Ramesh C, Vallikad E, Ahuja VK. UTERINE SARCOMA – A TWENTY YEARS PROFILE. Int J Gynecol Cancer 2003. [DOI: 10.1136/ijgc-00009577-200303001-00235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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74
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Devi UK, Bafna UD, Ramesh C, Mukherjee G. DOES PRIMARY RADICAL HYSTERECTOMY AND PREOPERATIVE PELVIC RADIOTHERAPY FOLLOWED BY SURGERY MAKE ANY DIFFERENCE IN THE PROGNOSIS OF EARLY INVASIVE CERVICAL CANCER? Int J Gynecol Cancer 2003. [DOI: 10.1136/ijgc-00009577-200303001-00346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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75
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Ravindranath N, Ramesh C, Reddy MR, Das B. A Facile and Convenient Three-component Coupling Protocol for the Synthesis of Pyrano and Furoquinolines. CHEM LETT 2003. [DOI: 10.1246/cl.2003.222] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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