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ESTIMATION OF THE REAL AREA OF AU NANOPARTICLES OVER HOPG USING ELECTROCHEMICAL TECHNIQUES 利用电化学技术估计金纳米颗粒在hopg上的实际面积
IF 0.3
Anales AFA Pub Date : 2021-07-15 DOI: 10.31527/analesafa.2021.32.2.48
A. Fuentes, A. Herrera, L. Avalle, E. Santos
{"title":"ESTIMATION OF THE REAL AREA OF AU NANOPARTICLES OVER HOPG USING ELECTROCHEMICAL TECHNIQUES","authors":"A. Fuentes, A. Herrera, L. Avalle, E. Santos","doi":"10.31527/analesafa.2021.32.2.48","DOIUrl":"https://doi.org/10.31527/analesafa.2021.32.2.48","url":null,"abstract":"The metallic electrodes show a high affinity for the electroadsorption processes of hydrogen and/or oxygen in acid solutions, so it is possible to characterize them by electrochemical techniques. In the present work the electroreduction of oxygenated species will be used to estimate the real areas of the electrodes designed with Au nanostructures in HOPG at different times of deposition. The results allow to conclude that Au nanostructures in HOPG can reach important electroactive areas. That is to say that despite their nanometric sizes they have a great capacity to experience the transfer of charge.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"13 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2021-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87241855","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
ELECTRICAL POTENTIAL BETWEEN NON-PARALLEL FLAT ELECTRODES – SIMULATION OF A CELL USED WITH TOMATO 非平行扁平电极间的电位-番茄细胞的模拟
IF 0.3
Anales AFA Pub Date : 2021-07-15 DOI: 10.31527/analesafa.2021.32.2.43
A. Hemsy
{"title":"ELECTRICAL POTENTIAL BETWEEN NON-PARALLEL FLAT ELECTRODES – SIMULATION OF A CELL USED WITH TOMATO","authors":"A. Hemsy","doi":"10.31527/analesafa.2021.32.2.43","DOIUrl":"https://doi.org/10.31527/analesafa.2021.32.2.43","url":null,"abstract":"The equipotential lines of the field generated by the cell used in dielectric measurements of whole fruit tomato are plotted. This cell consists of two inclined electrodes, at inverse potentials, and is an adaptation made in the Dielectric Laboratory of the cell used by Varlan-Sansen. To obtain the graphs, the Laplace equation was solved by finite differences and a program in Fortran language was written, which performs the calculations by numerical iteration. The field generated by the cell at different electrode separation distances was analyzed.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"43 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2021-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77990930","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
QUANTITATIVE ANALYSIS OF CARDIAC PLANAR SPECT IMAGES OF 99mTC-MIBI RADIOPHARMACEUTICAL 99mTC-MIBI放射制药公司心脏平面SPECT图像定量分析
IF 0.3
Anales AFA Pub Date : 2021-07-15 DOI: 10.31527/ANALESAFA.2021.32.2.39
Natalí Guisande, M. Pallarès, S. Rozanskas, L. Quiroga, C. Y. Chain, L. H. Illanes
{"title":"QUANTITATIVE ANALYSIS OF CARDIAC PLANAR SPECT IMAGES OF 99mTC-MIBI RADIOPHARMACEUTICAL","authors":"Natalí Guisande, M. Pallarès, S. Rozanskas, L. Quiroga, C. Y. Chain, L. H. Illanes","doi":"10.31527/ANALESAFA.2021.32.2.39","DOIUrl":"https://doi.org/10.31527/ANALESAFA.2021.32.2.39","url":null,"abstract":"In this work 99mTc-MIBI cardiac scintigraphs are quantitively analyzed with the aim to determine the radiopharmaceutical uptake in the heart (organ of interest) and in the liver. The impact of the radioactivity distribution in the diagnostic quality of the images is discussed.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"21 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2021-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76464676","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
SELECTION OF POWER LINE COMMUNICATIONS PROTOCOL APPLIED TO A WIND TURBINE UNDER SEVERE CLIMATE CONDITIONS 恶劣气候条件下风力发电机组电力线通信协议的选择
IF 0.3
Anales AFA Pub Date : 2021-07-15 DOI: 10.31527/analesafa.2021.32.2.55
A. L. Ibarreta Fañanas, M. Lavorato
{"title":"SELECTION OF POWER LINE COMMUNICATIONS PROTOCOL APPLIED TO A WIND TURBINE UNDER SEVERE CLIMATE CONDITIONS","authors":"A. L. Ibarreta Fañanas, M. Lavorato","doi":"10.31527/analesafa.2021.32.2.55","DOIUrl":"https://doi.org/10.31527/analesafa.2021.32.2.55","url":null,"abstract":"The main purpose of this paper is to study the preliminary selection of one or more Power Line Communications protocols or standards, to be used in a full duplex communication between a wind turbine and a command center powered by this wind turbine. This situation considers that the wind turbine is located in an isolated area in the Patagonia Austral region, working under severe climate conditions.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"16 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2021-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87457534","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
SELF-REGULATED LEARNING IN ENGINEERING STUDENTS: STRATEGIES FOR PEDAGOGICAL RESOURCE 工科学生自主学习:教学资源策略
IF 0.3
Anales AFA Pub Date : 2021-04-15 DOI: 10.31527/ANALESAFA.2021.32.1.32
V. Miná, M. Silvestre, L. Otero
{"title":"SELF-REGULATED LEARNING IN ENGINEERING STUDENTS: STRATEGIES FOR PEDAGOGICAL RESOURCE","authors":"V. Miná, M. Silvestre, L. Otero","doi":"10.31527/ANALESAFA.2021.32.1.32","DOIUrl":"https://doi.org/10.31527/ANALESAFA.2021.32.1.32","url":null,"abstract":"This paper presents some findings of the investigation \"Self-regulated learning in engineering students of the Army Engineering Faculty (FIE)\". The central theoretical contributions on the “self-regulation of learning” comes from theconceptual approaches of Zimmerman and Pintrich since they allow the understanding of the processes that takes placein the control of: thoughts, feelings, motivations and actions for the achievement of the learning objectives.It was found that to achieve this self-regulation in their learning, the students in this sample developed strategies throughwhich they manage and internalize resources from the academic environment. They are grouped into two large catego-ries: group study and the use of elements of the environment. The dynamics of conformation and functioning of work incollaborative study teams are similar among students. In addition, they describe the progressive use of elements of theinstitutional environment: study spaces, materials, technologies, institutional devices and also codes and dynamics ofsocial interaction typical of this faculty. The achievement of self-regulation implies the progressive incorporation of theresources of the academic context and this is a process that demands time and effort from the student. The acquisitionof self-regulation is evidence of the solid construction of the student ́s craft and a successful educational affiliation tothe university context.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"39 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2021-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83134634","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: 4
PHOTOPHYSICAL AND PHOTOCHEMICAL SYSTEMS WITH SEMICONDUCTORS FOR THE CONVERSION OF SOLAR ENERGY. A REVIEW 用于太阳能转换的半导体光物理和光化学系统。回顾
IF 0.3
Anales AFA Pub Date : 2021-04-15 DOI: 10.31527/ANALESAFA.2021.32.1.22
F. A. Filippin, H. Fasoli
{"title":"PHOTOPHYSICAL AND PHOTOCHEMICAL SYSTEMS WITH SEMICONDUCTORS FOR THE CONVERSION OF SOLAR ENERGY. A REVIEW","authors":"F. A. Filippin, H. Fasoli","doi":"10.31527/ANALESAFA.2021.32.1.22","DOIUrl":"https://doi.org/10.31527/ANALESAFA.2021.32.1.22","url":null,"abstract":"Electrochemical energy sources are an alternative to replace technology based on the burning of fossil fuels. In an elec-trochemical system the potential drop spreads over a very narrow region at an interphase, creating high electric fields.So, there are good technological reasons to study semiconductor / electrolyte interphases. Currently, one of the ways touse renewable resources is through photovoltaic technology that directly converts solar radiation into electrical energy.This technology is manufactured from semiconductors, generally silicon, following an extremely careful and expensivemanufacturing procedure. An option for photovoltaic devices is photoelectrochemical cells.These cells are made bythe contact of a semiconductor electrode with a solution, which can be easily prepared and offers the possibility oflow-cost manufacturing. Understanding how these devices work requires knowledge of the characteristics of semicon-ductors and how these materials behave in contact with an electrolytic solution and under illumination by sunlight. Thepresent work describes, through an updated review, the principles and applications of semiconductor electrodes as themain components in a photoelectrochemical solar cell (PEC), to carry out chemical reactions of technological interest.In addition, the elements that are required for the improvement in the performance and construction of the PEC are discussed.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"35 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2021-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85422962","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
A PRELIMINARY STUDY OF THE EFFECT OF ANESTHETIC AGENTS ON THE RHEOLOGICAL PARAMETERS OF GLYCATED ERYTHROCYTES 麻醉药物对糖化红细胞流变学参数影响的初步研究
IF 0.3
Anales AFA Pub Date : 2021-01-15 DOI: 10.31527/ANALESAFA.2020.31.4.117
M. V. B. D. Silva, Facultad Cs. Bioquímicas y Farmacéuticas Rosario Argentina. Área Física, H. Castellini, N. Alet, B. Riquelme, Analía I. Alet, Fceia – Rosario Argentina Departamento de Física, Argentina. Facultad de Cs. Médicas Rosario, Ifir Rosario Argentina. Grupo de Óptica Aplicada a la Biología
{"title":"A PRELIMINARY STUDY OF THE EFFECT OF ANESTHETIC AGENTS ON THE RHEOLOGICAL PARAMETERS OF GLYCATED ERYTHROCYTES","authors":"M. V. B. D. Silva, Facultad Cs. Bioquímicas y Farmacéuticas Rosario Argentina. Área Física, H. Castellini, N. Alet, B. Riquelme, Analía I. Alet, Fceia – Rosario Argentina Departamento de Física, Argentina. Facultad de Cs. Médicas Rosario, Ifir Rosario Argentina. Grupo de Óptica Aplicada a la Biología","doi":"10.31527/ANALESAFA.2020.31.4.117","DOIUrl":"https://doi.org/10.31527/ANALESAFA.2020.31.4.117","url":null,"abstract":"This paper presents a preliminary study of the effects of the anesthetics propofol, remifentanil, and vecuronium bromide on the rheological properties of glycated erythrocytes in vitro, modeling the glycation by hyperglycemia observed in diabetes. Viscoelastic and aggregation kinetic parameters of erythrocytes were determined using an erythrocyte rheometer and an optical chip aggregometer developed in our laboratory. The results showed significant alterations in the membrane surface viscosity, the elastic modulus, and the erythrocyte deformability index for the different anesthetics studied. Also, the kinetics aggregation parameters showed different types of alterations due to the effect of anesthetics. This preliminary study suggests that the use of these anesthetics in diabetic patients could induce hemorheological alterations that disturb the microcirculation. For this reason, it is recommended to deepen these investigations to prevent complications in surgical procedures.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"62 5 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2021-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91087727","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
SHAPE OF GRAIN BOUNDARY GROOVE ONPURE ICE SURFACE 纯冰表面晶界槽的形状
IF 0.3
Anales AFA Pub Date : 2021-01-15 DOI: 10.31527/ANALESAFA.2020.31.4.112
C. L. D. Prinzio, Córdoba Argentina. Famaf Ciudad Universitaria, D. Stoler, P. I. Achával, G. Varela
{"title":"SHAPE OF GRAIN BOUNDARY GROOVE ONPURE ICE SURFACE","authors":"C. L. D. Prinzio, Córdoba Argentina. Famaf Ciudad Universitaria, D. Stoler, P. I. Achával, G. Varela","doi":"10.31527/ANALESAFA.2020.31.4.112","DOIUrl":"https://doi.org/10.31527/ANALESAFA.2020.31.4.112","url":null,"abstract":"In this work we studied the evolution of the groove that forms the grain boundary (BG) when it emerges to a free surface, in the presence of different processes of matter transport. By using a confocal microscope, the shape of the grain edge groove was obtained in an ice sample with orientation< 1010 >/50◦ at −5◦C ; after keeping it 3 h in an environment with dry air. The shapes and depths of the grain boundary groove obtained experimentally, at regular time periods, were satisfactorily fitted considering a process of transport of matter developed by Srinivasan and Trivedi. In this model the transport of matter is mainly ruled by gaseous diffusion and not by surface diffusion.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"36 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2021-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90646020","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
EXTENDED FADDEEV-JACKIW CANONICAL QUANTIZATION FOR THE (1+1)-DIMENSIONAL NONRELATIVISTIC ELECTRODYNAMICS (1+1)维非相对论电动力学的扩展faddev - jackiw正则量子化
IF 0.3
Anales AFA Pub Date : 2021-01-15 DOI: 10.31527/ANALESAFA.2020.31.4.127
E. Manavella
{"title":"EXTENDED FADDEEV-JACKIW CANONICAL QUANTIZATION FOR THE (1+1)-DIMENSIONAL NONRELATIVISTIC ELECTRODYNAMICS","authors":"E. Manavella","doi":"10.31527/ANALESAFA.2020.31.4.127","DOIUrl":"https://doi.org/10.31527/ANALESAFA.2020.31.4.127","url":null,"abstract":"Some time ago, we proposed an extension of the usual Faddeev-Jackiw formalism for constrained systems with Grassmann dynamic variables in the field theory context. In the present work, we apply this extended formalism to the (1+1)-dimensional nonrelativistic electrodynamics. By comparing the obtained results with those corresponding to the implementation of Dirac formalism on this model, we find the same constraints and generalized brackets. In this way, we can conclude that the extended Faddeev-Jackiw and the Dirac formalisms can be considered equivalent, at least for this model. On the contrary, in this case, we find that there is no equivalence between the usual Faddeev-Jackiw and the Dirac formalisms. On the other hand, we observe that the extended formalism is more economical than the Dirac one regarding the computation of both, constraints and generalized brackets.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"1 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2021-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79283837","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
STUDENT REPRESENTATIONS ON THE USE AND INFLUENCE OF ICT IN THE ENGINEERING STUDY 学生对工程学习中信息通信技术的使用和影响的陈述
IF 0.3
Anales AFA Pub Date : 2021-01-15 DOI: 10.31527/analesafa.2021.31.4.1
V. Miná, F. Romeo, S. Travieso, M. Silvestre, L. Otero
{"title":"STUDENT REPRESENTATIONS ON THE USE AND INFLUENCE OF ICT IN THE ENGINEERING STUDY","authors":"V. Miná, F. Romeo, S. Travieso, M. Silvestre, L. Otero","doi":"10.31527/analesafa.2021.31.4.1","DOIUrl":"https://doi.org/10.31527/analesafa.2021.31.4.1","url":null,"abstract":"This work presents the initial findings of the research “Self-regulated learning in Engineering students from the Army Engineering College (FIE)”. The sample of this study was made up of students from the 2016 cohort. Zimmerman’s cyclical model of “self-regulation of learning” is the main theoretical reference of this research since it allows the understanding of the processes that take place in the control of: thoughts, feelings, motivations and actions to achieve the learning objectives. It was found that for the achievement of this self-regulation in their learning a resource that they use as academic support is Information and Communication Technologies (ICT). Access to the same YouTube channels and websites is similar among students. The interviewees unanimously mentioned a distinctive human trait of this faculty: the closeness and familiarity in the treatment between teachers and students. This trust is what drives them to interact freely with their teachers and allows them to raise questions and concerns through different communication channels. In summary, human communication and the effective presence of teachers enhance the use of ICTs, since they ultimately provide feedback and benefit students in accessing comprehension strategies that contribute to their academic self-regulation.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"387 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2021-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90512214","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
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