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PbS/graphene hybrid nanostructures coated glassy carbon electrode for the electrochemical sensing of copper ions in aqueous solution. Food Chem Toxicol 2022; 168:113375. [PMID: 35995075 DOI: 10.1016/j.fct.2022.113375] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 08/08/2022] [Accepted: 08/11/2022] [Indexed: 01/21/2023]
Abstract
In this research, we have studied the electrochemical sensing of Cu(II) ions in aqueous solution using PbS/Graphene composite nanostructure coated glassy carbon electrode (GCE). The SEM-EDAX analysis revealed that the lead sulphide nanocrystals are homogeneously embedded on the graphene nanosheets with an uniform particle size of 100 nm, and the elements presents 92.32% and Lead content of 5.45% and Sulfur content of 0.91%. Raman spectra exhibits G with respect to the E2g sp2 hybridized C-C and D band with respect to the A1g mode in the disordered edge region of the GNS. The composite nanostructure coated GCE (PbS/Graphene/GCE) was prepared and its performance in the existence of metal ions such us Cd(II),Pb(II), Mg(II), Cu(II) and Ni(II) was studied using the current voltage curves in double distilled water within the scan rates of 25 to 300mVs-1. The PbS/Graphene coated carbon electrode exhibited the higher anodic and cathodic peak current for copper solution than the other metal ions studied, which various linearly proportional to concentration. The electrochemical sensing characteristics PbS/GNS/GCE was found to be significant towards detecting Cu2+ ion within the concentration range of 1 × 10-4 to 1 × 10-8 M, with a lowest sensing detection limit of 1 × 10-8 M.
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Synthesis and characterization of 4-Halobenzylidene malanonitriles for optical detection of Nickel (II) ions in aqueous solution. CHEMOSPHERE 2022; 290:133248. [PMID: 34906523 DOI: 10.1016/j.chemosphere.2021.133248] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 12/01/2021] [Accepted: 12/08/2021] [Indexed: 06/14/2023]
Abstract
In this work, we have developed fluorescent detection techniques for the determination of Ni2+ ions in aqueous medium with sensitivity using metal coordinating fluorescent molecules namely 4-Halobenzylidene malanonitrile. The halogen substituted benzylidene malanonitile were synthesised Knoevenagel condensation reaction of various halogen substituted aromatic aldehydes with malanonitrile and products were characterised by IR and NMR spectroscopy. The obtained benzylidene malanonitiles and are exhibited a fluorescent emission with a peak of 430 nm, 440 nm and 448 nm for chloro, bromo and fluoro substituted compounds, respectively. The intensity of optical emission of the studied molecules is increased proportional to the addition of Ni2+ ions. The effect of different halogen substitution on the fluorescence behaviour of benylidene malononitrile has also been investigated. The synthesised title compounds showed a lowest detection limit of 10-20 M for the Nickel (II) ions in aqueous solution under UV-Vis absorption spectra. The molecule 4- Bromobenzylidene malanonitrile exhibited a lowest detection limit of 10-19 M for the Nickel (II) ions in, aqueous solution, photoluminescence analysis.
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MRI Apparent Diffusion Coefficient (ADC) Values as a Predictive Biomarker on the Outcomes of Chemoradiotherapy in Carcinoma Cervix. Int J Radiat Oncol Biol Phys 2021. [DOI: 10.1016/j.ijrobp.2021.07.1661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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4
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Imaging features of Robert's uterus: Case series of a rare Mullerian duct anomaly. Trop Doct 2021; 51:553-560. [PMID: 34313499 DOI: 10.1177/00494755211034061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The diagnosis of Mullerian duct anomaly is crucial because of strong association with infertility, endometriosis and miscarriage. Robert's uterus is a rare variant of septate uterus. Patients present with recurrent abdominal pain and severe dysmenorrhoea. Magnetic resonance imaging is the investigation of choice. In this case series, we present the imaging features of four such cases.
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Supramolecular synthons in 4-chloroanilinium-5-sulfosalicylate monohydrate: In vitro antioxidant and antimicrobial studies. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130170] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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6
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Delayed post-oesophagectomy gastric conduit obstruction: two decades after oesophagectomy for oesophageal squamous cell carcinoma. ANZ J Surg 2020; 91:E163-E164. [PMID: 33017085 DOI: 10.1111/ans.16246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 07/05/2020] [Accepted: 07/24/2020] [Indexed: 11/29/2022]
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Giant choledochal cyst type 4A: a surgical challenge. Pan Afr Med J 2020; 37:95. [PMID: 33425128 PMCID: PMC7757274 DOI: 10.11604/pamj.2020.37.95.24811] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Accepted: 07/19/2020] [Indexed: 11/22/2022] Open
Abstract
Choledochal cysts are rare congenital anomalies of the biliary tract. There are 5 subtypes of choledochal cyst and in adults type 4 is the most common. Choledochal cyst rarely exceeds the size of 6cm in the reported literature. Only a handful of cases of giant choledochal cysts are reported in the literature. Here we report a case of a 33-year-old lady who presented with a huge abdominal mass and on evaluation was found to have a giant choledochal cyst type 4A. The patient underwent excision of the extrahepatic hugely dilated choledochal cyst with cholecystectomy and reconstruction was done by Roux-en-Y hepaticojejunostomy to the confluence of the right and left hepatic duct at the hilum.
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P-193 Safety, tolerability, and efficacy of total neoadjuvant therapy for adult patients with locally advanced high-risk rectal adenocarcinoma: Retrospective real-world data from South India. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.04.275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Synthesis, structural, thermal, mechanical, laser damage threshold and DFT investigations on bis (2-methylimidazolium-4-aminobenzoate) single crystal. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127045] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Structural characterization, computational and biological studies of a new third order NLO (1:1) organic adduct: 2-Aminopyrimidine: 3-nitrophthalic acid. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.05.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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11
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Synthesis, growth, structural characterization and biological investigation of hydrogen bonded organic molecular salt: N, N-diethylanilinium-5-sulphosalicylate. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.04.120] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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12
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Outcomes of patients with metastatic clear-cell renal cell carcinoma treated with second-line VEGFR-TKI after first-line immune checkpoint inhibitors. Eur J Cancer 2019; 114:67-75. [PMID: 31075726 DOI: 10.1016/j.ejca.2019.04.003] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 03/29/2019] [Accepted: 04/02/2019] [Indexed: 01/05/2023]
Abstract
BACKGROUND Immune checkpoint inhibitors (ICIs) are being increasingly utilised in the front-line (1L) setting of metastatic clear-cell renal cell carcinoma (mccRCC). Limited data exist on responses and survival on second-line (2L) vascular endothelial growth factor-receptor tyrosine kinase inhibitor (VEGFR-TKI) therapy after 1L ICI therapy. PATIENTS AND METHODS This is a retrospective study of mccRCC patients treated with 2L VEGFR-TKI after progressive disease (PD) with 1L ICI. Patients were treated at MD Anderson Cancer Center or Memorial Sloan Kettering Cancer Center between December 2015 and February 2018. Objective response was assessed by blinded radiologists' review using Response Evaluation Criteria in Solid Tumours v1.1. Descriptive statistics and Kaplan-Meier method were used. RESULTS Seventy patients were included in the analysis. Median age at mccRCC diagnosis was 59 years; 8 patients (11%) had international metastatic database consortium favourable-risk disease, 48 (69%) had intermediate-risk disease and 14 (20%) had poor-risk disease. As 1L therapy, 12 patients (17%) received anti-programmed death ligand-1 (PD-(L)1) monotherapy with nivolumab or atezolizumab, 33 (47%) received nivolumab plus ipilimumab and 25 (36%) received combination anti-PD-(L)1 plus bevacizumab. 2L TKI therapies included pazopanib, sunitinib, axitinib and cabozantinib. On 2L TKI therapy, one patient (1.5%) achieved a complete response, 27 patients (39.7%) a partial response and 36 patients (52.9%) stable disease. Median progression-free survival (mPFS) was 13.2 months (95% confidence interval: 10.1, NA). Forty-five percent of subjects required a dose reduction, and twenty-seven percent of patients discontinued treatment because of toxicity. CONCLUSIONS In this retrospective study of patients with mccRCC receiving 2L TKI monotherapy after 1L ICI, we observed 2L antitumour activity and tolerance comparable to historical data for 1L TKI.
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Cyclohexane and phosphorus based benzoxazine-bismaleimide hybrid polymer matrices: thermal and morphological properties. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2019. [DOI: 10.1080/10601325.2019.1598773] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Benzoxazine modified diglycidyl ether of bisphenol-a/silicon/siliconized epoxy hybrid polymer matrices: Mechanical, thermal, electrical and morphological properties. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2018. [DOI: 10.1080/10601325.2018.1470469] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Gastric cancer in India: epidemiology and standard of treatment. Updates Surg 2018; 70:233-239. [PMID: 29611052 DOI: 10.1007/s13304-018-0527-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Accepted: 03/14/2018] [Indexed: 02/07/2023]
Abstract
India has a low incidence of gastric cancer. It ranks among the top five most common cancers. Regional diversity of incidence is of importance. It is the second most common cause of cancer related deaths among Indian men and women in the age between 15 and 44. Helicobacter pylori carcinogenesis is low in India. Advanced stage at presentation is a cause of concern. Basic and clinical research in India reveals a globally comparable standard of care and outcome. The large population, sociodemographic profile and challenges in health expenditure, however, remain a major challenge for health care policy managers. The newer formation of National Cancer Grid, integration of national databases and the creation of social identification database Aadhaar by The Unique Identification Authority of India are set to enhance the health care provision and optimal outcome.
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Polyhedral oligomeric silsesquioxane (POSS) reinforced-unsaturated polyester hybrid nanocomposites: Thermal, thermomechanical and morphological properties. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2018. [DOI: 10.1080/10601325.2018.1453264] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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17
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Supramolecular network through N H…O, O H…O and C H…O hydrogen bonding interaction and density functional theory studies of 4-methylanilinium-3-carboxy-4-hydroxybenzenesulphonate crystal. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2017.10.013] [Citation(s) in RCA: 15] [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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Can ARFI elastography be used to differentiate parathyroid from thyroid lesions? J Endocrinol Invest 2018; 41:111-119. [PMID: 28569362 DOI: 10.1007/s40618-017-0694-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Accepted: 05/16/2017] [Indexed: 10/19/2022]
Abstract
OBJECTIVES To assess if elasticity score (ES) and shear wave velocity (SWV) measurement obtained using ARFI elastography can differentiate between parathyroid lesions and thyroid nodules. MATERIALS AND METHODS ARFI elastography was performed on patients with primary hyperparathyroidism or solid thyroid nodules who were being considered for surgery using virtual touch quantification and virtual touch imaging (VTI) software. Only patients with surgical histopathology (47 parathyroid lesions, 38 benign thyroid nodules and 55 malignant thyroid nodules) were included for final analysis. SWV and ES of the parathyroid and thyroid nodules were compared and their ability to differentiate between parathyroid and thyroid was analyzed using receiver operating characteristic curve analysis. RESULTS There were 39 solitary adenomas, 2 double adenomas and 4 parathyroid hyperplasias with mean size of 19.6 ± 9.7 mm in 44 patients (21 male, 23 females) with primary hyperparathyroidism. The mean SWV of the parathyroid lesion (1.6 ± 0.78 m/s) was significantly different from benign (2.11 ± 0.8 m/s) and malignant (4.3 ± 2.71 m/s) thyroid nodules, p < 0.05; so was the ES, Chi square = 51.6, p < 0.001. The majority of parathyroid lesions (n = 37, 78.7%) had ES of 2 with speckled (n = 42, 89.3%) appearance, and none showed ES of 4. The diagnostic performance of speckled appearance on VTI, elasticity score and SWV measurements was 0.901, 0.724 and 0.797, respectively, to differentiate between parathyroid and thyroid lesions. CONCLUSIONS Parathyroid lesions are softer than thyroid nodules. A shear wave velocity of 1.72 m/s can differentiate between parathyroid lesions and thyroid nodules.
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Synthesis, crystal structure, physicochemical properties of hydrogen bonded supramolecular assembly of N,N -diethylanilinium-3, 5-dinitrosalicylate crystal. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.08.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Hydrogen bonded charge transfer molecular salt (4-chloro anilinium-3-nitrophthalate) for photophysical and pharmacological applications. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 184:318-326. [PMID: 28527395 DOI: 10.1016/j.saa.2017.05.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 05/02/2017] [Accepted: 05/08/2017] [Indexed: 06/07/2023]
Abstract
Radical scavenging activity against DPPH radical and binding properties of a hydrogen bonded charge transfer molecular salt 4-chloro anilinium-3-nitrophthalate(CANP) with calf thymus DNA has been studied by electronic absorption and emission spectroscopy. The molecular structure and crystallinity of the CANP salt have been established by carried out powder and single crystal X-ray diffraction analysis which indicated that cation and anion are linked through strong N+H…O- type of hydrogen bond. FTIR spectroscopic study was carried out to know the various functional groups present in the crystal. 1H and 13C NMR spectra were recorded to further confirm the molecular structure of the salt crystal. The thermal stability of the title salt was established by TG/DTA analyses simultaneously on the powdered sample of the title crystal. Further, the CANP salt was examined against various bacteria and fungi strains which showed a remarkable antimicrobial activity compared to that of the standards Ciproflaxin and Clotrimazole. The results showed that the CANP salt could interact with CT-DNA through intercalation. Antioxidant studies of the substrates alone and synthesized CANP salt showed that the latter has been better radical scavenging activity than that of the former against DPPH radical. The third order nonlinear susceptibility of the CANP salt was established by the Z-scan study.
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"PAUSE": a method for communicating radiological extent of peritoneal malignancy. Clin Radiol 2017; 72:972-980. [PMID: 28778454 DOI: 10.1016/j.crad.2017.07.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 05/16/2017] [Accepted: 07/03/2017] [Indexed: 11/24/2022]
Abstract
Radiology reports of diffuse peritoneal disease should address key findings pertinent to the management of these patients. The reporting of radiology findings in patients with peritoneal malignancy is currently variable and poorly standardised. Using the acronym "PAUSE" we emphasise the key imaging features that a radiology report should include in a patient with peritoneal malignancy, focussing on the key elements determining feasibility and likely prognosis of surgery and potential benefits from cytoreductive surgery (CRS) and hyperthermic intraperitoneal chemotherapy (HIPEC). The term "PAUSE" incorporates the following: P, primary tumour and peritoneal carcinomatosis index (PCI) as estimated by imaging; A, ascites and abdominal wall involvement; U, unfavourable sites of involvement; S, small bowel and mesenteric disease; E, extra peritoneal metastases. Thus, "PAUSE" has the potential to standardise radiology reporting in this field.
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Carcinoma of the gallbladder presenting with multiple osseous and inguinal lymph node metastases. Indian J Cancer 2016; 52:230-1. [PMID: 26853417 DOI: 10.4103/0019-509x.175829] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Cervical Lymphoma Mimicking Cervical Fibroid: A Report of Three Cases and Review of Literature. INDIAN JOURNAL OF GYNECOLOGIC ONCOLOGY 2015. [DOI: 10.1007/s40944-015-0013-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Correlation of Dose to Bone Marrow With Hematological Toxicity and MRI Based Estimation of Conversion of Active to Inactive Bone Marrow in Long Course Neo adjuvant Chemoradiation for Locally Advanced Rectal Cancer. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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25
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Development and characterization of functionalized Al2O3and TiO2-reinforced polybenzoxazine nanocomposites. Des Monomers Polym 2015. [DOI: 10.1080/15685551.2015.1092014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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904: Investigation on the role of low dose radiation as chemo-potentiator in locally advanced carcinoma cervix: A new treatment paradigm based on radiobiological advantage. Eur J Cancer 2014. [DOI: 10.1016/s0959-8049(14)50804-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Synthesis, growth, structure and spectroscopic characterization of a new organic nonlinear optical hydrogen bonding complex crystal: 3-carboxyl anilinium p-toluene sulfonate. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 125:114-119. [PMID: 24531540 DOI: 10.1016/j.saa.2014.01.035] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2013] [Revised: 01/05/2014] [Accepted: 01/10/2014] [Indexed: 06/03/2023]
Abstract
A new organic nonlinear optical hydrogen bonding complex salt of 3-carboxyl anilinium p-toluene sulfonate has been synthesized and highly transparent good quality single crystals of it were successfully grown employing slow solvent evaporation solution growth technique at ambient temperature. The (1)H and (13)C NMR spectra were recorded to establish the molecular structure. The single crystal XRD analysis carried out reveals that the title salt crystallizes in monoclinic crystal system with non-centrosymmetric P2₁ space group. The FT-IR spectrum was recorded to confirm the presence of various functional groups in the grown title crystal. The UV-Vis-NIR transmission spectrum was recorded to apprehend the suitability of the single crystal of the title salt for various optical and NLO applications. The TG/DTA thermal analysis was performed to establish the thermal stability of the crystal. The SHG activity in the grown crystal was identified employing the modified Kurtz-Perry powder test. The electronic charge distribution and reactivity of the molecules within the title complex was studied by HOMO and LUMO analysis and the molecular electrostatic potential (MEP) of the title crystal was performed using the B3LYP method.
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Synthesis, growth, spectral, and thermal studies of a new organic molecular charge transfer complex crystal: 3-nitroaniline 4-methyl benzene sulfonate. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 122:436-440. [PMID: 24322759 DOI: 10.1016/j.saa.2013.11.029] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Revised: 11/05/2013] [Accepted: 11/06/2013] [Indexed: 06/03/2023]
Abstract
A new organic intermolecular charge transfer complex 3-nitroaniline 4-methyl benzene sulfonate (NATS) has been successfully synthesized and good optical quality single crystals grown by slow solvent evaporation solution growth technique at room temperature using methanol as the solvent. The (1)H and (13)C NMR spectra were recorded to establish the molecular structure of the title complex. The crystal structure of NATS has been determined by single crystal XRD analysis and it belongs to orthorhombic crystal system with space group Pbca. Fourier transform infrared (FT-IR) spectral study has been carried out to confirm the presence of various functional groups present in the complex. Electronic absorption spectrum was recorded to find the prevalent charge transfer activity in the complex. The UV-Vis-NIR transmission spectrum was recorded in the range 200-2500 nm, to find the optical transmittance window and lower cut off wavelength of the title crystal. The thermal stability of the title complex crystal was studied by using thermo-gravimetric and differential thermal analyses and found that the compound is stable up to 215 °C.
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Synthesis, growth and spectroscopic investigation of an organic molecular charge transfer crystal: 8-hydroxy quinolinium 4-nitrobenzoate 4-nitrobenzoic acid. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 117:259-263. [PMID: 23995602 DOI: 10.1016/j.saa.2013.07.097] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Revised: 07/22/2013] [Accepted: 07/31/2013] [Indexed: 06/02/2023]
Abstract
An organic intermolecular charge transfer complex salt of 8-Hydroxy quinolinium 4-nitrobenzoate 4-nitrobenzoic acid (OPNB) has been synthesized. Single crystals of OPNB were grown by slow solvent evaporation solution growth technique at room temperature. The (1)H and (13)C NMR spectra were recorded to confirm the molecular structure of the complex salt. The crystal structure of OPNB has been determined by single crystal XRD analysis and it belongs to triclinic crystal system with space group P-1. Fourier transform infrared (FT-IR) spectral study has been carried out to identify the various functional groups present. The UV-Vis-NIR transmittance spectrum was recorded in the range 200-2500nm, to find the suitability of the single crystal for various optical applications. The thermal stability of the crystal was investigated using thermogravimetric (TG) and differential thermal analyses (DTA).
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Crystal growth, spectral, optical and thermal properties of semiorganic nonlinear optical material: picolinic acid hydrochloride. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 110:28-35. [PMID: 23557771 DOI: 10.1016/j.saa.2013.03.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2012] [Revised: 02/19/2013] [Accepted: 03/03/2013] [Indexed: 06/02/2023]
Abstract
The bulk single crystal of 2-picolinic acid hydrochloride (PHCL) (a semi-organic nonlinear optical material of dimensions 25×15×10 mm(3)) was successfully grown by slow solvent evaporation technique. The XRD results revealed the cell parameters and the centrosymmetric nature of the crystal structure. FT-IR spectral study identified the functional groups, nature of bonding and their bond strength. The UV-Vis-NIR studies recognized the optical transmittance window and the lower cut off wavelength of the PHCL crystal and thus it could be performed as a NLO material. (1)H NMR and (13)CNMR spectra were correlated with the XRD standard for the molecular structure reveals harmony of the materials. Thermal properties of the crystal were studied by thermo gravimetric analysis (TGA) and differential thermal analysis (DTA); the derived kinetic parameter values support the intuitive association of picolinicacid and HCl leads to the spontaneous formation of PHCL with a first order reaction. The presence of a proton and a proton acceptor groups provide the necessary stability to induce charge asymmetry in the PHCL structure. The load dependent hardness values of the crystal were measured by microhardness testing.
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Thermal and Morphological Properties of Octa(maleimido phenyl) Silsesquioxane (OMPS)-Reinforced Polybenzoxazine Hybrid Nanocomposites. INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION 2013. [DOI: 10.1080/1023666x.2013.766830] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Organoclay-Filled Vinyl Ester Monomer Toughened Epoxy-Intercrosslinked Matrix Materials. INT J POLYM MATER PO 2013. [DOI: 10.1080/00914037.2012.670818] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Preparation and Characterization of Cyclohexyl Moiety Toughened POSS-Reinforced Epoxy Nanocomposites. INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION 2013. [DOI: 10.1080/1023666x.2013.747253] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Deterioration of coastal groundwater quality in Island and mainland regions of Ramanathapuram District, Southern India. ENVIRONMENTAL MONITORING AND ASSESSMENT 2013; 185:931-944. [PMID: 22527453 DOI: 10.1007/s10661-012-2604-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2011] [Accepted: 03/15/2012] [Indexed: 05/31/2023]
Abstract
A study was carried out in the Island and mainland regions of Ramanathapuram District to characterize the physico-chemical characteristics of 87 groundwater samples in Island and 112 groundwater samples in mainland which include pH, EC, TDS, salinity, total alkalinity, calcium hardness, magnesium hardness, total hardness, chloride and fluoride. Heavy inorganic load in majority of the groundwater samples has been estimated due to the salinity, TDS, TH and chloride beyond the threshold level which substantiates the percolation of sea water into the freshwater confined zones. Although the groundwater sources are available in plenty, the scarcity of potable water is most prevalent in this coastal area. The Water Quality Index (WQI) and Langeleir Saturation Index (LSI) have also been calculated to know the potable and corrosive/incrusting nature of the water samples. The statistical tools such as principal component analysis, box plots and correlation matrix have also been used to explain the influence of different physico-chemical parameters with respect to one another among the groundwater samples. The percentage of groundwater samples in mainland was more than that in Island with respect to the acceptable limit of WHO drinking standard, especially in TDS, CH, TH and chloride but the converse is observed in the case of fluoride. About 8% of the mainland aquifers and 42% of Island aquifers were identified to have fluoride greater than 1.5 mg/l. The signature of salt-water intrusion is observed from the ratio of Cl/CO(3)(2-) + HCO(3) and TA/TH. A proper management plan to cater potable water to the immediate needs of the people is to be envisaged.
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Preparation and Characterization of Vinyl Ester Monomer–Toughened Epoxy-Clay Hybrid Nanocomposites: Thermal and Morphological Properties. INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION 2012. [DOI: 10.1080/1023666x.2012.696399] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Abstract
This report presents two cases of human fascioliasis from different states in India. Although only few cases of human fascioliasis have been reported from India previously, both these cases were encountered within a span of three months at this tertiary care centre. Case 1 had significant symptoms with episodes of fever, abdominal pain and eosiniphilia and underwent multiple diagnostic procedures before the correct diagnosis was reached. Case 2, who had few symptoms, had fascioliasis diagnosed with minimal evaluation. These different presentations seen at two ends of the clinical spectrum of disease along with findings of peripheral eosinophilia, and radiological findings led to a presumptive diagnosis that was then confirmed by microscopic examination of bile. Morphometric analysis of ova from these cases was suggestive of infestation with F. gigantica or a F. gigantica-like hybrid. Both patients were treated with triclabendazole which was imported from Geneva. The need to be aware of the possibility of occurrence of this disease and the inclusion of drugs used for treating the disease, in the Indian drug list, should be emphasized.
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Synthesis, growth, spectral and thermal properties of a new organic crystal: 2-carboxypyridin-1-ium trichloroacetate. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 95:73-79. [PMID: 22613126 DOI: 10.1016/j.saa.2012.04.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2011] [Revised: 03/12/2012] [Accepted: 04/03/2012] [Indexed: 06/01/2023]
Abstract
A novel organic optical material complex of 2-carboxypyridin-1-ium trichloroacetate has been synthesized and crystals were grown from aqueous solution employing the technique of controlled evaporation. The crystal structure has been determined using single crystal X-ray diffraction studies. The single crystals were successfully grown by the slow evaporation method with dimensions 12 × 8 × 3 mm(3). FT IR spectral investigation has been carried out to identify the various functional groups present in the grown crystal. Molecular structure was confirmed by NMR spectral analysis. Melting point was found using thermal measurements.
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2-(6-Methyl-2,3,4,9-tetrahydro-1 H-carbazol-1-ylidene)propanedinitrile. Acta Crystallogr Sect E Struct Rep Online 2011; 67:o3270. [PMID: 22199777 PMCID: PMC3238928 DOI: 10.1107/s160053681104654x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2011] [Accepted: 11/04/2011] [Indexed: 11/20/2022]
Abstract
In the title compound, C16H13N3, the cyclohexene ring adopts a sofa conformation. An intramolecular N—H⋯N hydrogen bond generates an S(7) ring motif. In the crystal, the molecules are linked by pairs of N—H⋯N interactions, forming centrosymmetric dimers with an R22(14) motif.
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2-(1,2,3,4-Tetra-hydro-9H-carbazol-1-yl-idene)propane-dinitrile. Acta Crystallogr Sect E Struct Rep Online 2010; 66:o2965. [PMID: 21589132 PMCID: PMC3009027 DOI: 10.1107/s1600536810042649] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2010] [Accepted: 10/20/2010] [Indexed: 11/10/2022]
Abstract
In the title compound, C(15)H(11)N(3), the cyclo-hexene ring adopts a sofa conformation. An intra-molecular N-H⋯N hydrogen bond generates an S(7) ring motif. In the crystal, mol-ecules are linked by inter-molecular N-H⋯N, C-H⋯N and C-H⋯π inter-actions into a three-dimensional network.
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Solid waste, its health impairments and role of rag pickers in Tiruchirappalli city, Tamil Nadu, Southern India. WASTE MANAGEMENT & RESEARCH : THE JOURNAL OF THE INTERNATIONAL SOLID WASTES AND PUBLIC CLEANSING ASSOCIATION, ISWA 2010; 28:951-958. [PMID: 19910398 DOI: 10.1177/0734242x09352705] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In India, the significant increase in the generation of municipal solid waste (MSW) during the last few decades is due to the rapid population and economic development. Though the appropriate attempts are made through the 3-'R' principles, waste management still needs to be envisaged seriously by everybody for a cleaner and greener environment. Rag-pickers, who contribute to solid waste management to some extent, are the people who rummage through garbage bins to pick out 'rags' for their livelihood. These rag-pickers usually collect the materials that have good re-sale value as these materials are mostly recycled or reused. In the present study, the collection and the management of solid waste and the level of microbial pollution generated through air, soil and solid waste were studied. A questionnaire survey based on age, sex, educational status, socio-economic status, habits and health effects was conducted from 65 randomly selected rag-pickers from various places of Tiruchirappalli city The results revealed that they can be properly educated and trained to protect themselves from unhygienic practices and addiction. Either the Government or non-governmental organizations (NGOs) should devise a suitable proposal to monitor and make use of these unorganized rag-pickers who are indispensable to the society.
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Fluoride removal from water using activated and MnO2-coated Tamarind Fruit (Tamarindus indica) shell: batch and column studies. JOURNAL OF HAZARDOUS MATERIALS 2010; 177:719-729. [PMID: 20071077 DOI: 10.1016/j.jhazmat.2009.12.091] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2009] [Revised: 12/18/2009] [Accepted: 12/21/2009] [Indexed: 05/28/2023]
Abstract
The present work is concerned with the defluoridation capacities of activated (ATFS) and MnO(2)-coated Tamarind Fruit Shell (MTFS), using batch and column sorption techniques. In the batch technique, the dynamics of fluoride sorption, with respect to pH, [F](o) and sorbent dose, was studied. The applicability of pseudo-first order for ATFS and Ritchie-second order for MTFS was observed. The kinetics data were found to fit well with Temkin isotherm for ATFS and Langmuir for MTFS. The interaction of co-ions in the defluoridation capacity of the sorbent was studied. Column experiments were carried out under a constant fluoride concentration of 2mg/l, flow rate and different bed depths. The capacities of the breakthrough and exhaustion points increased with increase in the bed depth for ATFS unlike MTFS. The Thomson model was applied to the column experimental results. The characterization of the sorbents, ATFS and MTFS, was done using the FTIR, SEM and XRD techniques.
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4-tert-Butyl-pyridinium picrate. Acta Crystallogr Sect E Struct Rep Online 2010; 66:o999. [PMID: 21580795 PMCID: PMC2983922 DOI: 10.1107/s1600536810011037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2010] [Accepted: 03/24/2010] [Indexed: 05/30/2023]
Abstract
In the title compound, C(9)H(14)N(+)·C(6)H(2)N(3)O(7) (-), the three nitro groups of the picrate anion are twisted out of the plane of the attached benzene ring; the dihedral angles are 32.8 (2), 10.5 (4) and 12.3 (4)°. The pyridinium cations and picrate anions are linked via bifurcated N-H⋯(O,O) hydrogen bonds. The ionic pairs are linked into a ribbon-like structure along [101] by C-H⋯O hydrogen bonds.
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Abstract
In the title compound, C5H7N2+·C6H2N3O7−, the 4-aminopyridinium cation is essentially planar (r.m.s. deviation = 0.002 Å). The three nitro groups in the picrate anion are twisted away from the attached benzene ring [dihedral angles = 24.1 (1), 9.3 (3) and 21.4 (1)°]. In the crystal structure, the ions are linked into a three-dimensional network by N—H⋯O and C—H⋯O hydrogen bonds.
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p53 and its influence in adenocarcinoma stomach. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e15685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e15685 Background: Gastric cancer is the second most common cause of the malignancy in the world after lung cancer. Various pathogenesis have been given for the adenocarcinoma, like mutation in the E-catherin gene, amplification of COX-2, HGF/ SF, VEGF; deletion of FHIT, APC, p53 but none have provided a definite target for treatment. Methods: This is a immunohistochemical prospective experiment study done on 76 cases of Gastric Adenocarcinoma.The location of the tumors were recorded as in the proximal stomach (fundus and body) and distal stomach (antrum, prepylorus, and pylorus). PAb1801 clonewas obtained from the ZYMED LABORATRIES, San Franscisco. A standardised immunohistochemical method was followed in this study. Results: p53 mutations were seen 41 out of 76 cases(53.95%). And 23 out of 41(56.09%) cases of p53 expression of the total mutated cases expressed p53 100%. 20 out of 36 cases (55.55%) of age below 60 yrs and 21 out of 40 cases (52.55%) of age above 60 yrs were p53 positive. 33 out of 60 (55%)of the males and 8 out of 16 (50%) females were reported of having gastric adenocarcinoma with p53expression. The histology of the tissue samples from the gastric adenocarcinoma patients had following relationship with the p53 immunoreactivity, 20 out of 37 cases(54.05%) of the well differentiated,7 out of 17 cases (41.18% )of the moderately differentiated, and and 13 out of 21 cases(61.90%) of the poorly differentiated gastric adenocarcinoma showed positive immunoreactivity. 15 out of 33 cases (45.45%)were localized to the proximal stomach and 30 out of 52 cases (57.69%)were localized to the distal stomach. 52.63 % of the non-mucinous type of gastric adenocarcinoma showed positive p53 immunoreactivity. Conclusions: The TP53 mutation is slightly more common in males than females, with greater occurrence in the late years of life. The mutation is more marked in the poorly differentiated gastric adenocarcinoma. The antral, pylorus,and the prepyloric parts of the stomach( the distal stomach) are more prone for mutated p53 induced adenocarcinoma. No significant financial relationships to disclose.
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Hedgehog signaling: Gli2 and its influence in squamous esophageal cancer. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e15596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e15596 Background: Gli family zinc finger proteins are mediators of Sonic hedgehog (Shh) signaling and are implicated as potent oncogenes. Gli2 plays a dual role as activator of keratinocyte proliferation and repressor of epidermal differentiation. This study is to determine the expression pattern and the extent of Hh-signaling molecule(Gli2) in squamous cell carcinoma of oesophagus. Methods: A prospective immunohistochemical experimental study was done to identify the expression of Gli2 in 64 cases of squamous cell carcinoma of oesophagus. The study population consisted of patients of the age group 38–87 yrs. The cases consisted of 29 cases of keratinised squamous cell carcinoma.. Of the 64 cases, 20 were well differentiated, 9 moderately differentiated and 35 poorly differentiated tumours. Results: See Table . Gli2 expression was 25%. The cytoplasmic expression is positive in 9 cases and nuclear expression is positive in 5 cases. The average intensity of cytoplasmic expression was more than that of nuclear expression.Gli2 is less expressed in elderly cancers.Gli2 expression is comparatively more in upper third tumours. There were no obvious differences amongst the sex, differentiation and keratinization. The reason can be attributed to the fact that Hh signalling pathway works in a time, concentration and position dependent manner.Conclusions: Deregulation of Hh signalling will result in defective proliferation and differentiation of cells. These findings can be used for better prognosis of the patients by using stem cell therapy and HH pathway inhibitors in the treatment for squamous cell carcinomas of oesophagus. Protein kinase A (Pka) maintains the Gli transcription factors in an inactive state, so activation of Pka with agonists such as forskolin would prevent Gli-mediated activation of target-gene transcription. Gli can also be inhibited at the RNA level by targeting its transcripts with antisense oligonucleotides. To the best of our knowledge, this is the first study of expression of Gli2 in squamous cell carcinoma of oesophagus. [Table: see text] No significant financial relationships to disclose.
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Synthesis, crystal growth, structural, thermal and optical properties of naphthalene picrate an organic NLO material. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2008; 71:755-759. [PMID: 18353712 DOI: 10.1016/j.saa.2008.01.036] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2007] [Accepted: 01/28/2008] [Indexed: 05/26/2023]
Abstract
Crystalline substance of naphthalene picrate (NP) was synthesized and single crystals were grown using slow evaporation solution growth technique. The solubility of the naphthalene picrate complex was estimated using different solvents such as chloroform and benzene. The material was characterized by elemental analysis, powder X-ray diffraction (XRD), nuclear magnetic resonance (NMR) and fourier transform-infrared (FT-IR) techniques. The electronic absorption was studied through UV-vis spectrophotometer. Thermal behavior and stability of the crystal were studied using thermogravimetric (TG) and differential thermal analysis (DTA) techniques. The second harmonic generation (SHG) of the material was confirmed using Nd:YAG laser.
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Synthesis, crystal growth and properties of the charge transfer complex adduct of 2-nitro aniline with picric acid – An organic non-linear optical material. CRYSTAL RESEARCH AND TECHNOLOGY 2008. [DOI: 10.1002/crat.200711114] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Synthesis, spectral, thermal and NLO properties ofN,N -Dimethyl anilinium picrate. CRYSTAL RESEARCH AND TECHNOLOGY 2008. [DOI: 10.1002/crat.200710940] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Synthesis, crystal growth, spectral, thermal and optical properties of acenaphthene picrate. CRYSTAL RESEARCH AND TECHNOLOGY 2008. [DOI: 10.1002/crat.200710949] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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