检索结果-南通市图书馆

International Journal of Mental Health Promotion 2022年第4期24卷 565-581页

作者： Victoria Gonzáles-Gutierrez Aldo Alvarez-Risco Alfredo Estrada-Merino mar.a de las mercedes anderson-seminario Sabina Mlodzianowska Shyla del-Aguila-Arcentales Jaime A.Yáñez CETYS Universidad MexicaliBaja CaliforniaMexico Universidad de Lima Facultad de Ciencias Empresariales y EconómicasCarrera de Negocios InternacionalesLimaPeru Escuela Nacional de marina Mercante“Almirante Miguel Grau” CallaoPeru Universidad Norbert Wiener Vicerrectorado de InvestigaciónLimaPeru Teoma Global Gerencia Corporativa de Asuntos Científicos y RegulatoriosLimaPeru

The current study measures the inﬂuence of multitasking behavior and self-efﬁcacy for self-regulated learning(SESRL)on perceptions of academic performance and views in university students during the COVID-19 pan-demic in Mexico.264 university students fulﬁlled an online *** was observed that multitasking beha-vior negatively inﬂuences SESRL(-0.203),while SESRL showed a positive inﬂuence of 0.537 on perceptions of academic performance,and multitasking behavior had an inﬂuence of-0.097 on the perception of academic ***’s alpha and Average Variance Extracted values were 0.809 and 0.577(multitasking behavior),0.819 and 0.626(SESRL),0.873 and 0.725(perceptions of academic performance),*** results of the bootstrapping test showed that the path coefﬁcients were signiﬁ*** study outcomes can support new plans in universities to ensure the best academic *** study showed evidence of the COVID-19 impact on education *** study’s novelty is based on using the partial least square structural equation modeling(PLS-SEM)technique to evaluate these variables.

关键词： Multitasking behavior COVID-19 Mexico self-efﬁcacy for self-regulated learning academic performance online class pandemic Peru

Thiosemicarbazones Synthesized from Acetophenones: Tautomerism, Spectrometric Data, Reactivity and Theoretical Calculations

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Analytical Mass Spectrometry and Chromatography 2019年第2期7卷 19-34页

作者： Belén Gastaca Hernán Rubén Sánchez Fiorella Menestrina maricel Caputo mar.a de las mercedes Schiavoni Jorge Javier Pedro Furlong Laboratory of Organic Compounds Studies (LAdeCOR) Department of Chemistry Facultad de Ciencias Exactas National University of La Plata La Plata Argentina Institute of Physics of Liquids and Biological Systems (IFLySIB CONICET) National University of La Plata La Plata Argentina Laboratory of Research and development of Analytical Methods (LIDMA) Department of Chemistry Facultad de Ciencias Exactas National University of La Plata La Plata Argentina

Tautomeric forms of Thiosemicarbazones have been investigated by spectrometric methods, their chemical reactivity and theoretical calculations of the relative tautomers stabilities. The mass spectral fragmentation of thiosemicarbazones synthesized from acetophenones has been studied by CG/MS. The analysis of the corresponding spectra shows not only the regular fragmentation mechanisms but homolytic ruptures from even-electron species. 1H NMR spectra exhibit signals for the most intense open thioketo tautomeric structure, although when using TFA a ring structure is observed in the corresponding tautomeric equilibrium. density Functional Theory calculations (DFT) also provide evidence to support the experimental observations by GC-MS and 1H NMR. Methylation reactions give support to the occurrence of the thioenol tautomeric form which would be the second most abundant according to the density Functional Theoretical calculations.

关键词： Thiosemicarbazones Tautomerism MS NMR Theoretical Calculations

GC/MS Analyses of Thiosemicarbazones Synthesized from Acetophenones: Thermal decay and Mass Spectra Features

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Analytical Mass Spectrometry and Chromatography 2015年第1期3卷 1-13页

作者： Belén Gastaca Gastón Galletti Hernán Rubén Sánchez Reinaldo Pis Diez mar.a de las mercedes Schiavoni Jorge Javier Pedro Furlong Laboratorio de Estudio de Compuestos Orgánicos (LAdeCOR) Departamento de Química Facultad de Ciencias Exactas Universidad Nacional de La Plata La Plata Argentina CEQUINOR Centro de Química Inorgánica (CONICET UNLP) Facultad de Ciencias Exactas UNLP La Plata Argentina

The mass spectral fragmentation of thiosemicarbazones synthesized from acetophenones has been studied by CG/MS. These carbonyl compounds exhibit chromatographic peaks which are not observed in aliphatic analogues or those synthesized from aldehydes. The analysis of the corresponding spectra has allowed structural assignment to the dimerization of gas phase neutral fragments. Theoretical calculations (DFT level) also provide evidence to support the experimental observations.

关键词： Thiosemicarbazones Mass Spectrometry Analyses Dimerization of Thiosemicarbazones

Duodenal duplication cyst and pancreas divisum causing acute pancreatitis in an adult male

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Endoscopy 2010年第9期2卷 318-320页

作者： Eduardo Redondo-Cerezo Julio Pleguezuelo-Díaz mercedes López de Hierro José F Macias-Sánchez Cristina Violo Ubia mar.a del mar martín-Rodríguez Javier de TeresaGalván Endoscopy Unit Gastroenterology DepartmentHospital Universitario Virgen de las NievesAvenida de las Fuerzas Armadas 2Granada 18014Spain

Duodenal duplication cysts are rare congenital abnormalities which are more commonly diagnosed in infancy and ***,in rare cases,these lesions can remain asymptomatic until *** combination of duplication cyst and pancreas divisum is extremely rare and both conditions have been linked with acute recurrent *** present the case of a 37 years-old patient who presented with repeated episodes of acute *** means of magnetic resonance imaging and endoscopic ultrasonography we discovered a duplication cyst whose cavity received drainage from the dorsal *** opening the cyst cavity to the duodenal lumen with a needle knife the patient presented no further episodes in the clinical *** literature findings and therapeutic options for these abnormalities are discussed with regard to the presented case.

关键词： Duplication cyst Pancreas divisum Acute recurrent pancreatitis Endoscopic ultrasonography

Alterations of Blood Immune Cells in Elderly Patients with COVID-19 and with or without Pre-Existing Type 2 Diabetes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Immunology 2022年第2期12卷 41-63页

作者： Susana Salva Yanina Kolling Nicolás Argañaraz mar.a Pía Rocchia Novillo mar.a del Milagro Rocchia Novillo Leonardo Albarracin Jacqueline Charubi Alejandra Casen Nadia Gobbato Mirta Rachid Susana Alvarez Haruki Kitazawa Julio Villena Juan Carlos Valdez Laboratory of Immunobiotechnology Reference Centre for Lactobacilli (CERELA-CONICET) Tucuman Argentina Laboratory of Immunology Faculty of Biochemistry Chemistry and Pharmacy National University of Tucuman Tucuman Argentina Hospital Centro de Salud “Zenon Santillan” Tucuman Argentina Instituto de Maternidad “Ntra. Sra. de las mercedes” Tucuman Argentina Food and Feed Immunology Group Laboratory of Animal Food Function Graduate School of Agricultural Science Tohoku University Sendai Japan Livestock Immunology Unit International Education and Research Center for Food and Agricultural Immunology (CFAI) Graduate School of Agricultural Science Tohoku University Sendai Japan

Elderly individuals, especially those with pre-existing conditions like type 2 diabetes mellitus (T2DM), have a high risk for developing severe cases of COVID-19. The aim of this work was to characterize the alterations of blood immune cells (BIC) in patients with symptomatic COVID-19 and confirmed SARS-CoV-2 infection, ≥60 years and who needed hospitalization in the Centro de Salud Hospital of Tucuman, Argentina, during the second peak of the pandemic in Argentina. Ten patients were enrolled from december 2020 to May 2021. Blood samples were taken at the time of admission (day 0) and five days after (day 5) for routine laboratory tests and the characterization of BIC by flow cytometry. Most of the patients were men (70%) aged between 60 and 78 years. The 70% of patients had T2DM while 50% had arterial hypertension. At day 0, all the patients had increased neutrophils and inflammatory markers (C reactive protein and D-dimers) and reduced numbers of lymphocytes, HLA-DRhi monocytes, CD16+CD56+ NK cells, CD3+HLA−DR+CD25+ cells, CD4+ and CD8+ T cells in blood. Patients received a standard treatment for COVID-19 care (O2, corticosteroids and antibiotics). The hospital treatment normalized the levels of BIC (day 5) in 30% of patients who were those with no comorbidities. In patients with T2DM, BIC recovery was variable. In T2DM patients who required administration of plasma (30%), prolonged O2 therapy (40%) or referral to the intensive care unit (10%) significant reductions of CD16+CD56+, CD3+HLA−DR+CD25+, CD4+ and CD8+ cells were observed between days 0 and 5. In line with previous studies, our results show that absolute counts of major lymphocyte subsets in blood are significantly and substantially decreased during the course of severe COVID-19 disease

关键词： COVID-19 SARS-CoV-2 Diabetes Elderly Blood Leukocytes Immune Response