International Letters of Chemistry, Physics and Astronomy最新文献_第9页

Corrosion Inhibition of Mild Steel in 0.5 M H2SO4 Using Ethanol Extract of Funtumia elastica 弹性土乙醇提取物在0.5 M H2SO4中对低碳钢的缓蚀作用

International Letters of Chemistry, Physics and Astronomy Pub Date : 2016-07-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILCPA.68.24

C. B. Adindu, Emeka Emanuel Oguzie, C. Ogukwe

引用次数: 3

pH Induced Fabrication of Kaolinite-Chitosan Biocomposite pH诱导制备高岭石-壳聚糖生物复合材料

International Letters of Chemistry, Physics and Astronomy Pub Date : 2016-07-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILCPA.68.1

S. Dey, M. Al-Amin, T. Rashid, Ashaduzzaman, S. Shamsuddin

{"title":"pH Induced Fabrication of Kaolinite-Chitosan Biocomposite","authors":"S. Dey, M. Al-Amin, T. Rashid, Ashaduzzaman, S. Shamsuddin","doi":"10.18052/WWW.SCIPRESS.COM/ILCPA.68.1","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILCPA.68.1","url":null,"abstract":"Functionalization of indigenous materials improves inherent physicochemical properties that depend mainly on their fabrication techniques. Here, pH triggered biocomposites using different proportions of kaolinite and chitosan were fabricated. It was revealed that the biocomposites were formed in 1M acetic acid and stabilized after dropwise addition of the mixture of kaolinite and chitosan solution in 3M NaOH. Binding of kaolinite and chitosan at their interface through functional groups was studied using Fourier transform infrared (FT-IR) spectroscopy and dynamic light scattering (DLS). The average particle size of the biocomposite in aqueous system having 80% w/w kaolinite and 20% w/w chitosan was determined to be 400.8 nm. Crystallinity disappearance of chitosan in the biocomposite, as shown in x-ray diffraction (XRD) spectrum, supports the wrapping of kaolinite with soft and flexible chitosan. Differential scanning calorimetry (DSC) showed the thermal stability of the biocomposites and it was found that the biocomposite fabricated from 50% w/w kaolinite and 50% w/w chitosan was stabled up to 318°C. Morphological studies were carried out using scanning electron microscopy (SEM), where a progressive tendency towards granular morphology was evidenced with increase in kaolinite content. These functionalized materials in bionanocomposite structure would play a vital role in advanced research in analytical and environmental science.","PeriodicalId":14453,"journal":{"name":"International Letters of Chemistry, Physics and Astronomy","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77092763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Synthesis and Structure of New Compounds NSAIDs-Like Using a Heterogeneous Recyclable Catalyst 利用多相可回收催化剂合成非甾体抗炎药类新化合物及其结构

International Letters of Chemistry, Physics and Astronomy Pub Date : 2016-07-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILCPA.68.82

A. Alkayal, Mohammad Keshe, R. Madwar, D. Sarko, Ayman Karam

引用次数: 0

Synthesis, Characterization and Antimicrobial Activities of some Novel 3-(4-Bromobenzyl)-5-(Thiophen-2-yl)-4H-1,2,4-Triazol Derivatives 新型3-(4-溴苯基)-5-(噻吩-2-基)- 4h -1,2,4-三唑衍生物的合成、表征及抗菌活性研究

International Letters of Chemistry, Physics and Astronomy Pub Date : 2016-07-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILCPA.68.10

A. Kaneria, Nilesh M. Thumar, K. Ladva, M. Vadodaria

引用次数: 1

The Effects of Additive TiO2 Nanoparticles on the Energy Gap of DCM Doped with PS Thin Films 添加TiO2纳米粒子对掺杂PS薄膜DCM能隙的影响

International Letters of Chemistry, Physics and Astronomy Pub Date : 2016-07-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILCPA.68.71

J. Odah

引用次数: 2

Development of the UV Spectrophotometric Method of Azithromycin in API and Stress Degradation Studies 原料药中阿奇霉素紫外分光光度法的建立及应激降解研究

International Letters of Chemistry, Physics and Astronomy Pub Date : 2016-07-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILCPA.68.48

Sandip Bhimani, G. Sanghvi, T. Pethani, G. Dave, Vishal Airao, Tejas Sharma, N. Sheth, Devendra Vaishnav

引用次数: 8

Anhydrous Aluminum Chloride Catalyzed Methylene Group Inclusion: Mechanistic, Spectral and Single Crystal X-Ray Structural Study on Methanediyl Bis(Cyclohexylmethylcarbamodithioate) 无水氯化铝催化亚甲基包合:甲二基双(环己基甲基氨基硫代酸酯)的机理、光谱和单晶x射线结构研究

International Letters of Chemistry, Physics and Astronomy Pub Date : 2016-07-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILCPA.68.61

K. Ramalingam, C. Rizzoli, G. S. Sivagurunathan, Subburayan Sivasekar, T. Rajaraman, M. Prabu

{"title":"Anhydrous Aluminum Chloride Catalyzed Methylene Group Inclusion: Mechanistic, Spectral and Single Crystal X-Ray Structural Study on Methanediyl Bis(Cyclohexylmethylcarbamodithioate)","authors":"K. Ramalingam, C. Rizzoli, G. S. Sivagurunathan, Subburayan Sivasekar, T. Rajaraman, M. Prabu","doi":"10.18052/WWW.SCIPRESS.COM/ILCPA.68.61","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILCPA.68.61","url":null,"abstract":"In this study anhydrous AlCl3 is used as a catalyst for the inclusion of a methylene group in to cyclohexylmethyldithiocarbamic acid to form methanediyl bis(cyclohexylmethylcarbamodithioate). Dichloromethane is used as a methylene group bearer in the reaction. A suitable mechanistic pathway involving +CH2Cl is discussed. FTIR, NMR and Mass spectral techniques have been used in the analysis. Single crystal X-ray structure of the compound was determined. FTIR spectrum of the compound showed υc-s band at 1073 cm-1 and υC-H vibrations appeared at 2853 and 2928 cm-1. Thioureide stretching band was observed at 1473 cm-1. The molecular ion peak in the Mass spectroscopy confirmed the proposed formula. H1 NMR spectrum of the compound showed a signal at 4.33(s) ppm for α-CH of the cyclohexyl ring and -CH3 protonsattached to nitrogen appeared at 3.40 ppm. Methylene proton (S-CH2-S) signal appeared at 3.16 ppm which is largely deshielded by the presence of two electronegative sulphur atoms on either side. The characteristic methylene carbon (S-CH2-S) signal appeared at 45.46 ppm in the 13C NMR spectrum. Single crystal X-ray structural analysis of the compound showed it to be monomeric. Methylene carbon in S-CH2-S, C(9) is tetrahedrally bonded to two hydrogen atoms and two sulphur atoms S(2), S(3). The molecule stacks its cyclohexyl rings along ‘c’ axis of the unit cell. Short contacts in the form of supramolecular interactions such as C---S and S---S exist in the solid state at 3.49 and 3.50 Å respectively.","PeriodicalId":14453,"journal":{"name":"International Letters of Chemistry, Physics and Astronomy","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78801287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparison of 3DCRT Dose Distribution in Radiotherapy for Lung Cancer Patient by Using AAA and PBC Algorithms 应用AAA与PBC算法对肺癌患者放疗3DCRT剂量分布的比较

International Letters of Chemistry, Physics and Astronomy Pub Date : 2016-07-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILCPA.68.54

M. M. Rana, S. Islam, Monirul Islam, Md. Shakilur Rahman, S. Alam, M. Bari

{"title":"Comparison of 3DCRT Dose Distribution in Radiotherapy for Lung Cancer Patient by Using AAA and PBC Algorithms","authors":"M. M. Rana, S. Islam, Monirul Islam, Md. Shakilur Rahman, S. Alam, M. Bari","doi":"10.18052/WWW.SCIPRESS.COM/ILCPA.68.54","DOIUrl":"https://doi.org/10.18052/WWW.SCIPRESS.COM/ILCPA.68.54","url":null,"abstract":"The Pencil Beam Convolution (PBC) algorithm in radiation treatment planning system is widely used to calculate the radiation dose distribution in radiotherapy planning. A new photon dose calculation algorithm known as Anisotropic Analytical Algorithm (AAA) by Varian Medical Systems is applied to investigate the difference of dose distribution by using AAA and PBC algorithms for the lung cancer with an inhomogeneity of its low density. In the present work, radiotherapy treatment planning of 10 lung cancer patients are designed with 6 MV photon beam using three-dimensional conformal radiation therapy (3DCRT) and dose distribution was calculated by the AAA and the PBC Algorithms. The dose distribution performance is evaluated by dose profile curve along transversal slice of PTV and Dose Volume Histogram (DVH) covered by the 95% isodose of PTV. The mean dose of organ at risks did not changed significantly but the volume of the PTV covered by the 95% isodose curve was decreased by 6% with inhomogeneity due to the algorithms. The dose distribution and the accuracy in calculating the absorbed dose of the AAA algorithm of the Varian Eclipse treatment planning system is analyzed and discussed.","PeriodicalId":14453,"journal":{"name":"International Letters of Chemistry, Physics and Astronomy","volume":"63 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78639180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Polymerisation on Bio-Tissues 生物组织的聚合

International Letters of Chemistry, Physics and Astronomy Pub Date : 2016-07-01 DOI: 10.18052/WWW.SCIPRESS.COM/ILCPA.68.18

H. Goto

引用次数: 0

Effect of Calcination Temperature on the Physical Properties of Layered LiNiO2 Prepared by Solid-State Reaction Method 煅烧温度对固相反应法制备层状二氧化钛物理性能的影响

International Letters of Chemistry, Physics and Astronomy Pub Date : 2016-06-30 DOI: 10.56431/p-webasc

N. Murali, J. Sailaja, Tewodros Aregai, S. Margarette, V. Veeraiah

{"title":"Effect of Calcination Temperature on the Physical Properties of Layered LiNiO2 Prepared by Solid-State Reaction Method","authors":"N. Murali, J. Sailaja, Tewodros Aregai, S. Margarette, V. Veeraiah","doi":"10.56431/p-webasc","DOIUrl":"https://doi.org/10.56431/p-webasc","url":null,"abstract":"A layered structure compound LiNiO2 material is synthesized by the solid-state reaction method under air atmosphere in the temperature range from 750 °C to 850 °C using Li2CO3 and NiO as the starting materials for 20 hours. The physical properties of the synthesized powder are investigated by X-ray diffraction (XRD), Field effect scanning electron microscopy (FESEM) and Fourier transform infrared spectroscopic (FT-IR) techniques. The results of XRD patterns possessed the α-NaFeO2 structure of the rhombohedral system (space group, ) with no evidence of any impurities. The morphological features of the powders are characterized by field effect scanning electron microscopy (FESEM). The particles of LiNiO2 powder are generally in the form of a smoothly edged polyhedron and their average grain size is approximately 2 - 3 μm. The FT-IR spectroscopic data of LiNiO2 reveal the structure of the oxide lattice constituted by LiO6 and NiO6 octahedra. In general, from this study, we conclude that the LiNiO2 synthesized by solid state reaction method at different temperatures to increase in the sintering temperature. The lattice constant is increased, while the sintering temperature is increased. The maximum and minimum intensity ratios of XRD spectra shows that the optimum calcination condition is 800°C for 20 h. At 750-850°C, the particle size distribution is in the range of 2 - 3 μm.","PeriodicalId":14453,"journal":{"name":"International Letters of Chemistry, Physics and Astronomy","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2016-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81787647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0