Journal of Molecular Catalysis A: Chemical最新文献

{"title":"Preparation of(NiCo)2 P/NF Self-supporting Electrode and Its Electrocatalytic Water Splitting","authors":"王 莎莎","doi":"10.3724/SP.J.7101438852","DOIUrl":"https://doi.org/10.3724/SP.J.7101438852","url":null,"abstract":"","PeriodicalId":370,"journal":{"name":"Journal of Molecular Catalysis A: Chemical","volume":"8 1","pages":"81-86"},"PeriodicalIF":5.062,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75677590","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}

{"title":"Effects of Different Linear Diamines on the Performance of Photocatalysts for Hydrogen Production of Sensitized Graphene","authors":"吕 功煊, 王 玉营, 张 旭强, 陈 建彪","doi":"10.3724/SP.J.7101438843","DOIUrl":"https://doi.org/10.3724/SP.J.7101438843","url":null,"abstract":"","PeriodicalId":370,"journal":{"name":"Journal of Molecular Catalysis A: Chemical","volume":"73 1","pages":"1-7"},"PeriodicalIF":5.062,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76452830","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}

{"title":"In Situ Synthesis of Ru Doped Hollow BiOBr Microsphere as an Efficient Photocatalyst for Photocatalytic CO2 Reduction and Organic Pollutant Degradation","authors":"迪 丽努尔·塔力甫, 阿 布力克木·阿布力孜, 张 俊杰, 亚 力昆江·吐尔逊","doi":"10.3724/SP.J.7101438844","DOIUrl":"https://doi.org/10.3724/SP.J.7101438844","url":null,"abstract":"","PeriodicalId":370,"journal":{"name":"Journal of Molecular Catalysis A: Chemical","volume":"9 1","pages":"8-18"},"PeriodicalIF":5.062,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77891399","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}

{"title":"The Research of CO Monoxide in Different Atmosphere on Au/Cu/FLA Catalysts at Low Temperature","authors":"孙 立波, 苏 慧娟, 郑 玉华, 祁 彩霞","doi":"10.3724/SP.J.7101438850","DOIUrl":"https://doi.org/10.3724/SP.J.7101438850","url":null,"abstract":"","PeriodicalId":370,"journal":{"name":"Journal of Molecular Catalysis A: Chemical","volume":"39 1","pages":"65-71"},"PeriodicalIF":5.062,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80612529","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}

{"title":"Gas-Phase Catalytic Isomerization of Tran-Chlorochloroolefin to Cis-Chlorochloroolefin and Its Potential Mechanism","authors":"吴 明亮","doi":"10.3724/SP.J.7101438846","DOIUrl":"https://doi.org/10.3724/SP.J.7101438846","url":null,"abstract":"","PeriodicalId":370,"journal":{"name":"Journal of Molecular Catalysis A: Chemical","volume":"52 1","pages":"28-35"},"PeriodicalIF":5.062,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89087235","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}

{"title":"Exosomal MicroRNAs Associate With Neuropsychological Performance in Individuals With HIV Infection on Antiretroviral Therapy.","authors":"Tess OʼMeara, Yong Kong, Jennifer Chiarella, Richard W Price, Rabib Chaudhury, Xinran Liu, Serena Spudich, Kevin Robertson, Brinda Emu, Lingeng Lu","doi":"10.1097/QAI.0000000000002187","DOIUrl":"10.1097/QAI.0000000000002187","url":null,"abstract":"<p><strong>Background: </strong>Neurocognitive dysfunction remains prevalent among people living with HIV (PLWH), even after viral suppression on combination antiretroviral therapy (cART). We investigated associations between neuropsychological performance (NP) and patterns of circulating exosomal microRNA (exo-miRNA) expression in PLWH on cART.</p><p><strong>Setting: </strong>A cross-sectional examination of plasma exo-miRNA among PLWH on cART with systemic viral suppression and volunteers without HIV infection.</p><p><strong>Methods: </strong>Thirty-one PLWH who started cART during early infection (n = 19) or chronic infection (n = 12) participated in phlebotomy and an 11-test neuropsychological battery after >1 year on treatment. NP higher- or lower-performing participants were categorized based on normalized neuropsychological scores. Total RNA was extracted from purified exosomes of 31 PLWH and 5 volunteers without HIV and subject to small RNA sequencing. Differential expression of exo-miRNAs was examined and biological functions were predicted.</p><p><strong>Results: </strong>Eleven exo-miRNAs were up-regulated in NP lower-performing (n = 18) relative to higher-performing PLWH (n = 13). A high proportion of the differentiating exo-miRNA target the axon guidance KEGG pathway and neurotrophin tyrosine receptor kinase signaling Gene Ontology pathway. Differential expression analysis of exo-miRNAs between NP lower- (n = 7) and higher-performing (n = 12) PLWH within the early infection group alone confirmed largely consistent findings.</p><p><strong>Conclusions: </strong>Plasma exo-miRNA content differed between NP higher- and lower-performing PLWH. Several differentially expressed exo-miRNAs were predicted to be involved in inflammation and neurodegeneration pathways. Exo-miRNA in plasma may indicate cross-talk between the circulation and central nervous system and thus may be clinically relevant for neurocognitive dysfunction in PLWH.</p>","PeriodicalId":370,"journal":{"name":"Journal of Molecular Catalysis A: Chemical","volume":"371 ","pages":"514-522"},"PeriodicalIF":2.9,"publicationDate":"2019-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6857839/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72437064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Toxoplasma gondii Intravacuolar-Network-Associated Dense Granule Proteins Regulate Maturation of the Cyst Matrix and Cyst Wall.","authors":"Rebekah B Guevara, Barbara A Fox, Alejandra Falla, David J Bzik","doi":"10.1128/mSphere.00487-19","DOIUrl":"10.1128/mSphere.00487-19","url":null,"abstract":"<p><p>Little is known regarding how the chronic <i>Toxoplasma gondii</i> cyst develops. Here, we investigated intravacuolar-network-associated dense granule (GRA) proteins GRA1, GRA2, GRA4, GRA6, GRA9, and GRA12 during cyst development <i>in vitro</i> after differentiation of the tachyzoite-stage parasitophorous vacuole. By day 1 postdifferentiation, GRA1, GRA4, GRA6, GRA9, and GRA12 colocalized with <i>Dolichos biflorus</i> agglutinin stain at the cyst periphery. In contrast, GRA2 remained in the cyst matrix. By day 2 postdifferentiation, coinciding with localization of GRA2 to the cyst periphery, GRA1, GRA4, GRA6, and GRA9 established a continuous matrix pattern in the cyst. In contrast, GRA2 and GRA12 were colocalized in prominent cyst matrix puncta throughout cyst development. While GRA2, GRA6, and GRA12 localized in outer and inner layers of the cyst wall, GRA1, GRA4, and GRA9 localized predominantly in the inner layers of the cyst wall. GRA2 and GRA12 were colocalized in the cyst wall by day 7 postdifferentiation. However, by day 10 postdifferentiation, GRA12 was relocalized from the cyst wall to puncta in the cyst matrix. Differentiation of Δ<i>gra2</i> parasites revealed a defect in the ability to establish a normal cyst matrix. In addition, the deletion of any intravacuolar-network-associated GRA protein, except GRA1, reduced the rate of accumulation of cyst wall proteins at the cyst periphery relative to the cyst interior. Our findings reveal dynamic patterns of GRA protein localization during cyst development and suggest that intravacuolar-network-associated GRA proteins regulate the formation and maturation of the cyst matrix and cyst wall structures.<b>IMPORTANCE</b><i>Toxoplasma gondii</i> establishes chronic infection in humans by forming thick-walled cysts that persist in the brain. If host immunity wanes, cysts reactivate to cause severe, and often lethal, toxoplasmic encephalitis. There is no available therapy to eliminate cysts or to prevent their reactivation. Moreover, how the vital and characteristic cyst matrix and cyst wall structures develop is poorly understood. Here, we visualized and tracked the localization of <i>Toxoplasma</i> intravacuolar-network-associated dense granule (GRA) proteins during cyst development <i>in vitro</i> Intravacuolar-network GRAs were present within the cyst matrix and at the cyst wall in developing cysts, and genetic deletion of intravacuolar-network-associated GRAs reduced the rate of accumulation of cyst wall material at the cyst periphery. Our results show that intravacuolar-network-associated GRAs, particularly GRA2 and GRA12, play dynamic and essential roles in the development and maturation of the cyst matrix and the cyst wall structures.</p>","PeriodicalId":370,"journal":{"name":"Journal of Molecular Catalysis A: Chemical","volume":"282 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6796980/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41280973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mild homogeneous oxidation and hydrocarboxylation of cycloalkanes catalyzed by novel dicopper(II) aminoalcohol-driven cores","authors":"Tiago A. Fernandes,&nbsp;Vânia André,&nbsp;Alexander M. Kirillov,&nbsp;Marina V. Kirillova","doi":"10.1016/j.molcata.2016.07.050","DOIUrl":"https://doi.org/10.1016/j.molcata.2016.07.050","url":null,"abstract":"<div><p><em>N</em>-benzylethanolamine (Hbea) and triisopropanolamine (H₃tipa) were applied as unexplored aminoalcohol <em>N</em>,<em>O</em>-building blocks for the self-assembly generation of two novel dicopper(II) compounds, [Cu₂(μ-bea)₂(Hbea)₂](NO₃)₂ (<strong>1</strong>) and [Cu₂(H₃tipa)₂(μ-pma)]·7H₂O (<strong>2</strong>) {H₄pma<!--> <!-->=<!--> <!-->pyromellitic acid}. These were isolated as stable and aqua-soluble microcrystalline products and were fully characterized by IR spectroscopy, ESI–MS(±), and single-crystal X-ray diffraction, the latter revealing distinct Cu₂ cores containing the five-coordinate copper(II) centers with the {CuN₂O₃} or {CuNO₄} environments. Compounds <strong>1</strong> and <strong>2</strong> were used as homogeneous catalysts for the mild oxidation of C₅–C₈ cycloalkanes to give the corresponding cyclic alcohols and ketones in up to 23% overall yields based on cycloalkane. The reactions proceed in aqueous acetonitrile medium at 50<!--> <!-->°C using H₂O₂ as an oxidant. The effects of different reaction conditions were studied, including the type and loading of catalyst, amount and kind of acid promoter, and water concentration. Despite the fact that different acids (HNO₃, H₂SO₄, HCl, or CF₃COOH) promote the oxidation of alkanes, the reaction is exceptionally fast in the presence of a catalytic amount of HCl, resulting in the TOF values of up to 430<!--> <!-->h⁻¹. Although water typically strongly inhibits alkane oxidations due to the reduction of H₂O₂ concentration and lowering of the alkane solubility, in the systems comprising <strong>1</strong> and <strong>2</strong> we observed a significant growth (up to 5-fold) of an initial reaction rate in the cyclohexane oxidation on increasing the amount of H₂O in the reaction mixture. The bond-, regio- and stereo-selectivity parameters were investigated in oxidation of different linear, branched, and cyclic alkane substrates. Both compounds <strong>1</strong> and <strong>2</strong> also catalyze the hydrocarboxylation of C₅–C₈ cycloalkanes, by CO, K₂S₂O₈, and H₂O in a water/acetonitrile medium at 60<!--> <!-->°C, to give the corresponding cycloalkanecarboxylic acids in up to 38% yields based on cycloalkanes.</p></div>","PeriodicalId":370,"journal":{"name":"Journal of Molecular Catalysis A: Chemical","volume":"426 ","pages":"Pages 357-367"},"PeriodicalIF":5.062,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.molcata.2016.07.050","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"2220022","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}

{"title":"Homogeneous oxidation of alkanes: Role of rhodium–alkyl complexes","authors":"E.G. Chepaikin ,&nbsp;A.P. Bezruchenko ,&nbsp;G.N. Menchikova ,&nbsp;А.Е. Gekhman","doi":"10.1016/j.molcata.2016.07.026","DOIUrl":"https://doi.org/10.1016/j.molcata.2016.07.026","url":null,"abstract":"<div><p>Catalytic systems RhCl₃–KI–NaCl and RhCl₃–Cu(OAc_f)₂–NaCl in aqueous perfluorinated carboxylic acids (CF₃COOH, C₃F₇COOH) are effective in coupled oxidation of alkanes and carbon monoxide with dioxygen. In their presence, predominant is the outer-sphere oxidation of alkanes into respective esters (alcohols) with involvement of peroxo rhodium species as an oxidant (mechanism <strong>A</strong>). The process occurs partially by the inner-sphere mechanism <strong>B</strong> involving Rh–alkyl intermediates. Mechanism B is supported by (a) formation of alkyl chlorides, (b) synthesis of acetic acid in conversion of methane, and (c) positional selectivity in oxidation of propane.</p></div>","PeriodicalId":370,"journal":{"name":"Journal of Molecular Catalysis A: Chemical","volume":"426 ","pages":"Pages 389-392"},"PeriodicalIF":5.062,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.molcata.2016.07.026","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"2220003","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}

{"title":"Ionic liquids/ZnO nanoparticles as recyclable catalyst for polycarbonate depolymerization","authors":"Francesco Iannone ,&nbsp;Michele Casiello ,&nbsp;Antonio Monopoli ,&nbsp;Pietro Cotugno ,&nbsp;Maria Chiara Sportelli ,&nbsp;Rosaria Anna Picca ,&nbsp;Nicola Cioffi ,&nbsp;Maria M. Dell’Anna ,&nbsp;Angelo Nacci","doi":"10.1016/j.molcata.2016.11.006","DOIUrl":"https://doi.org/10.1016/j.molcata.2016.11.006","url":null,"abstract":"<div><p>A useful protocol for waste bis-phenol A-polycarbonates (BPA-PC) chemical recycling is proposed based on a bifunctional acid/basic catalyst composed by nanostructured zinc oxide and tetrabutylammonium chloride (ZnO-NPs/NBu₄Cl) in quality of Lewis acid and base, respectively. Retro-polymerization reaction proved to be of general application for several nucleophiles, including water, alcohols, amines, polyols, aminols and polyamines, leading to the complete recovery of BPA monomer and enabling the PC polymer to function as a green carbonylating agent (green phosgene alternative) for preparing carbonates, urethanes and ureas. A complete depolymerization can be obtained in seven hours at 100<!--> <!-->°C and ZnO nanocatalyst can be recycled several times without sensible loss of activity. Remarkably, when polycarbonate is reacted with glycerol, it is possible to realize in a single process the conversion of two industrial wastes (BPA-PC and glycerol) into two valuable chemicals like BPA monomer and glycerol carbonate (the latter being a useful industrial solvent and fuel additive).</p></div>","PeriodicalId":370,"journal":{"name":"Journal of Molecular Catalysis A: Chemical","volume":"426 ","pages":"Pages 107-116"},"PeriodicalIF":5.062,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.molcata.2016.11.006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"2660121","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}