Current physical chemistry最新文献_第7页

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Current physical chemistry Pub Date : 2020-08-19 DOI: 10.2174/187794681002200625113928

F. Chiarella

引用次数: 0

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Current physical chemistry Pub Date : 2020-01-29 DOI: 10.2174/187794681001191216124206

U. Burghaus

引用次数: 1

Preface 前言

Current physical chemistry Pub Date : 2020-01-29 DOI: 10.2174/187794681001191216124319

K. Jalkanen

引用次数: 0

Synthesis and Characterization of Chemical Structures, Thermal Decomposition and Biological Properties of Novel Copper (II) Bio- Based Surfactants 新型铜(II)生物基表面活性剂的合成、化学结构、热分解和生物性能表征

Current physical chemistry Pub Date : 2020-01-16 DOI: 10.2174/1877946810666200116091321

Asha Meena, Rashmi Sharma, Vandana Sukhadia

{"title":"Synthesis and Characterization of Chemical Structures, Thermal Decomposition and Biological Properties of Novel Copper (II) Bio- Based Surfactants","authors":"Asha Meena, Rashmi Sharma, Vandana Sukhadia","doi":"10.2174/1877946810666200116091321","DOIUrl":"https://doi.org/10.2174/1877946810666200116091321","url":null,"abstract":"\u0000\u0000 Thermal degradation has attracted the attention of scientific\u0000community throughout the world due to its multiple applications in environment, energy,\u0000waste water treatment, pollution control, green chemistry, etc.\u0000\u0000\u0000\u0000The present work deals with the study of synthesis and characterization of\u0000thermal and biological properties of novel copper complex.\u0000\u0000\u0000\u0000Chemical structures of copper (II) sesame 2-amino-6-ethoxy benzothiazole\u0000complex were confirmed by IR, NMR, and ESR techniques. Thermal and biological properties\u0000were analysed by Thermogravimetry (TGA) and antimicrobial activity determination\u0000against Staphylococcus aureus.\u0000\u0000\u0000\u0000The TGA study reveals that copper (II) sesame 2-amino-6-ethoxy benzothiazole\u0000complex undergoes stepwise thermal degradation of ligand-soap bond of complex and unsaturated\u0000and saturated fatty acid components of edible oils. The complex exhibit significant\u0000antimicrobial activities against Staphylococcus aureus.\u0000\u0000\u0000\u0000This study provides relevant basic information on the thermal and antimicrobial\u0000properties of new copper (II) bio-based surfactants, as well as an explicit relationship\u0000structure-biological activity for their potential use as safe and green chemicals.\u0000","PeriodicalId":89671,"journal":{"name":"Current physical chemistry","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46434922","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: 1

Recent Developments in Lanthanide Doped Materials and their Applications (Part II) 镧系掺杂材料及其应用研究进展(二)

Current physical chemistry Pub Date : 2019-11-26 DOI: 10.2174/187794680903191019173613

G. A. Kumar

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Current physical chemistry Pub Date : 2019-11-14 DOI: 10.2174/187794680902191019124646

F. Rosei

引用次数: 0

Recent Developments in Lanthanide Doped Materials and their Applications (Part I) 镧系掺杂材料及其应用的最新进展（上）

Current physical chemistry Pub Date : 2019-11-14 DOI: 10.2174/187794680902191019124855

G. A. Kumar

引用次数: 0

The Binding and Viscometric Studies of Ni+2, Co+2 and Mn+2 Ions with Protein by Spectrometric and pH Metric Techniques 用光谱法和pH法研究Ni+2、Co+2和Mn+2离子与蛋白质的结合和粘度

Current physical chemistry Pub Date : 2019-11-14 DOI: 10.2174/1877946809666190917144139

S. Acharya, A. Sharma

{"title":"The Binding and Viscometric Studies of Ni+2, Co+2 and Mn+2 Ions with Protein by Spectrometric and pH Metric Techniques","authors":"S. Acharya, A. Sharma","doi":"10.2174/1877946809666190917144139","DOIUrl":"https://doi.org/10.2174/1877946809666190917144139","url":null,"abstract":"\u0000\u0000The metal ions play a vital role in a large number of widely differing\u0000biological processes. Some of these processes are quite specific in their metal ion requirements.\u0000In that only certain metal ions, in specific oxidation states, can full fill the necessary\u0000catalytic or structural requirement, while other processes are much less specific.\u0000\u0000\u0000\u0000 In this paper we report the binding of Mn (II), Ni (II) and Co (II) with albumin\u0000are reported employing spectrophotometric and pH metric method. In order to distinguish\u0000between ionic and colloidal linking, the binding of metal by using pH metric and viscometric\u0000methods and the result are discussed in terms of electrovalent and coordinate bonding.\u0000\u0000\u0000\u0000The binding of Ni+2, Co+2 and Mn+2 ions have been studied with egg protein at\u0000different pH values and temperatures by the spectrometric technique.\u0000\u0000\u0000\u0000The binding data were found to be pH and temperature dependent. The intrinsic\u0000association constants (k) and the number of binding sites (n) were calculated from\u0000Scatchard plots and found to be at the maximum at lower pH and at lower temperatures.\u0000Therefore, a lower temperature and lower pH offered more sites in the protein molecule for\u0000interaction with these metal ions. Statistical effects seem to be more significant at lower\u0000Ni+2, Co+2 and Mn+2 ions concentrations, while at higher concentrations electrostatic effects\u0000and heterogeneity of sites are more significant.\u0000\u0000\u0000\u0000The pH metric as well as viscometric data provided sufficient evidence about\u0000the linking of cobalt, nickel and manganese ions with the nitrogen groups of albumin.\u0000From the nature and height of curves in the three cases it may be concluded that nickel ions\u0000bound strongly while the cobalt ions bound weakly.\u0000","PeriodicalId":89671,"journal":{"name":"Current physical chemistry","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48781527","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: 1

Gas Phase Ionization of Toluene: Benzylium Versus Tropylium Pathway 甲苯的气相电离：苄基与铽途径

Current physical chemistry Pub Date : 2019-07-31 DOI: 10.2174/1877946809666190722140957

Thao Nguyen, M. Aparicio, M. Saleh

{"title":"Gas Phase Ionization of Toluene: Benzylium Versus Tropylium Pathway","authors":"Thao Nguyen, M. Aparicio, M. Saleh","doi":"10.2174/1877946809666190722140957","DOIUrl":"https://doi.org/10.2174/1877946809666190722140957","url":null,"abstract":"\u0000\u0000In this investigation, we used accurate mass high-resolution gas chromatography\u0000mass spectrometry to study the gas phase carbocations rearrangements and fragmentation\u0000of toluene and halo-toluenes as well as their deuterium labeled compounds.\u0000\u0000\u0000\u0000Accurate mass of selected ions from ionization of toluene and related compounds\u0000revealed that the initially formed radical cation C7H8\u0000+. does not rearrange to\u0000tropylium radical cation contradicting published literature.\u0000\u0000\u0000\u0000When the toluene radical cation was purely selected, it was found to lose a free\u0000radical (hydrogen atom) at collision energies greater than 5 eV and forming benzylium or\u0000tropylium cation C7H7\u0000+ (m/z = 91), with no other fragmentations.\u0000\u0000\u0000\u0000The resulting cation at collision energy greater than 20 eV fragmented by losing\u0000acetylene or ethylene or allene molecule to form C5H5\u0000+ (m/z = 65), C5H3\u0000+ (m/z = 63) or\u0000C4H3\u0000+ (m/z = 51) respectively. Purely selected C5H5\u0000+ cation at collision energy greater than\u000030 eV lost acetylene molecule and formed C3H3\u0000+ (m/z =39).\u0000\u0000\u0000\u0000In this investigation toluene, halotoluene and their deuterated derivatives\u0000(structural isomers) were found to ionize in the gas phase with isomer retention. Historically,\u0000it has been suggested that the seven carbons and hydrogen atoms would become indistinguishable.\u0000However, this should be revised in the light of new technologies.\u0000","PeriodicalId":89671,"journal":{"name":"Current physical chemistry","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2174/1877946809666190722140957","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44753966","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: 1

Rare Earth Doped Hydroxyapatite Nanoparticles for In Vitro Bioimaging Applications 稀土掺杂羟基磷灰石纳米粒子在体外生物成像中的应用

Current physical chemistry Pub Date : 2019-07-31 DOI: 10.2174/1877946809666190828104812

Pranjita Zantye, Fiona Fernandes, S. Ramanan, M. Kowshik

{"title":"Rare Earth Doped Hydroxyapatite Nanoparticles for In Vitro Bioimaging Applications","authors":"Pranjita Zantye, Fiona Fernandes, S. Ramanan, M. Kowshik","doi":"10.2174/1877946809666190828104812","DOIUrl":"https://doi.org/10.2174/1877946809666190828104812","url":null,"abstract":"\u0000\u0000 Fluorescence based bioimaging is one of the widely used method\u0000for obtaining imperative information on life processes.\u0000\u0000\u0000\u0000 Within the expansive spectrum of fluorescent agents being investigated, the trivalent\u0000Lanthanide (Ln) ion based nanoparticles have attracted attention due to their intrinsic\u0000luminescence property.\u0000\u0000\u0000\u0000Here we report a modified sol gel assisted synthesis of Europium (Eu) and Samarium\u0000(Sm) doped Hydroxyapatite nanoparticles (HAp NPs). Doping Ln ions in the selffluorescent\u0000hydroxyapatite lattice contributed towards an increased luminescence in the\u0000NPs.\u0000\u0000\u0000\u0000The XRD patterns reveal that the Eu+3 and Sm+3 doped HAp NPs display the\u0000characteristic peaks of hydroxyapatite in a hexagonal lattice structure, and the FTIR data\u0000confirms presence of characteristic functional groups. The as-synthesized HAp NPs exhibit\u0000short rod-shaped morphology with average length less than 60 nm. Upon excitation at representative\u0000wavelengths, the doped HAp NPs demonstrated characteristic emission lines of\u0000Eu+3 and Sm+3.\u0000\u0000\u0000\u0000The as-synthesized NPs displayed no toxicity towards HeLa cells and are\u0000easily internalized, exhibiting their potential as promising live cell bioimaging agents.\u0000","PeriodicalId":89671,"journal":{"name":"Current physical chemistry","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2174/1877946809666190828104812","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49426336","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: 9