Orbital: The Electronic Journal of Chemistry最新文献_第2页

GIL VALDO JOSÉ DA SILVA (1954-2023) 吉尔-瓦尔多-若泽-达席尔瓦（1954-2023）

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Orbital: The Electronic Journal of Chemistry Pub Date : 2023-09-12 DOI: 10.17807/orbital.v15i3.19319

Paulo Marcos Donate

{"title":"GIL VALDO JOSÉ DA SILVA (1954-2023)","authors":"Paulo Marcos Donate","doi":"10.17807/orbital.v15i3.19319","DOIUrl":"https://doi.org/10.17807/orbital.v15i3.19319","url":null,"abstract":"Gil Valdo José da Silva, from Guaimbê, São Paulo, rose above the constraints of his small-town upbringing. He moved to São Paulo in 1970 and graduated from the Antárctica Technical School with a degree in Industrial Chemistry. Initially employed by General Motors do Brasil, his zeal for knowledge drove him to pass the entrance exam at the University of S. Paulo's Chemistry Institute (IQ-USP) in 1975. Balancing studies and work, he taught chemistry in schools and developed a passion for teaching. Gil Valdo graduated in 1980 and went on to undertake doctoral studies in organic synthesis of natural goods. He was interested in research, particularly chemical synthesis and Nuclear Magnetic Resonance (NMR) techniques. His accomplishments went beyond the classroom; he became a licensed pilot, a Dive Master, and a lover of languages, culinary arts, and winemaking. Gil Valdo retired in December 2021, after more than 30 years at FFCLRP-USP, to pursue his passions more freely. He died on July 21, 2023, as a result of a heart attack. He was survived by a loving family and a legacy of intellectual, scientific, and cultural achievements. Gil Valdo José da Silva will be remembered for his serenity, dedication, and the diverse interests that enriched his life and the lives of those who were lucky enough to know him.","PeriodicalId":19680,"journal":{"name":"Orbital: The Electronic Journal of Chemistry","volume":"132 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139340644","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

Development of Articulate Storyline 3-Based Digital Teaching Materials on the Subject of Atomic Structure and Periodic Elements System for SMA/MA Students in Class X 面向X班SMA/MA学生的原子结构与周期元素系统数字教材的开发

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Orbital: The Electronic Journal of Chemistry Pub Date : 2023-07-15 DOI: 10.17807/orbital.v15i2.17959

Dewi Lestarani, Arvinda C. Lalang, Ina Manggi

{"title":"Development of Articulate Storyline 3-Based Digital Teaching Materials on the Subject of Atomic Structure and Periodic Elements System for SMA/MA Students in Class X","authors":"Dewi Lestarani, Arvinda C. Lalang, Ina Manggi","doi":"10.17807/orbital.v15i2.17959","DOIUrl":"https://doi.org/10.17807/orbital.v15i2.17959","url":null,"abstract":"The articulate storyline 3 application is a multimedia authoring tool used to create interactive learning media with content from a combination of text, images, graphics, sound, animation, and video that is usable on various devices such as laptops, tablets, and smartphones. Teaching materials developed based on articulate storyline 3 can help independent learning. The development model used as a reference in this study is the Borg and Gall model which consists of 5 stages: preliminary studies, design and development, design validation and revision, product trial, and final product dissemination. The results of the assessment of material and media experts on the level of validity of digital teaching materials have a very valid category with a percentage of validity throughout the whole at 87.95% and 93.3%, respectively. The student response to the digital teaching material during the trial was very positive, with an average overall percentage of 95.71% in small-group trials and 95% in large-group trials. Thus, digital teaching materials based on Articulate Storyline 3 on the subject matter of atomic structure and periodic systems of these elements are suitable for use in chemistry learning activities as a source of independent learning and learning media.","PeriodicalId":19680,"journal":{"name":"Orbital: The Electronic Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43972507","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

Scavenging Activity on Reactive Oxygen Species with Biological Relevance by Varronia curassavica curassavica对具有生物学相关性的活性氧的清除活性

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Orbital: The Electronic Journal of Chemistry Pub Date : 2023-07-15 DOI: 10.17807/orbital.v15i2.17939

G. Brasil, Romão Veloso, R. P. Assis, Juhan Augusto, Scardelato Pereira, Alexandre Carvalho, C. P. Soares, I. L. Brunetti, V. Isaac, Paulo Ricelli, G. Zocolo, M. Correa, André Gonzaga, dos Santos

引用次数: 0

Comparative Study of Fatty Acid Composition in Crude Vegetable Oils from Species Cultivated in Mato Grosso do Sul, Brazil 巴西南马托格罗索州栽培植物粗植物油脂肪酸组成的比较研究

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Orbital: The Electronic Journal of Chemistry Pub Date : 2023-07-14 DOI: 10.17807/orbital.v15i2.18168

Érico Vinícius Rocha Sanches, Geovanna Vilalva Freire, Simone Reis Santos, Gláucia Braz Alcantra, João Batista Gomes de Souza

{"title":"Comparative Study of Fatty Acid Composition in Crude Vegetable Oils from Species Cultivated in Mato Grosso do Sul, Brazil","authors":"Érico Vinícius Rocha Sanches, Geovanna Vilalva Freire, Simone Reis Santos, Gláucia Braz Alcantra, João Batista Gomes de Souza","doi":"10.17807/orbital.v15i2.18168","DOIUrl":"https://doi.org/10.17807/orbital.v15i2.18168","url":null,"abstract":"Soybean is the main oilseed cultivated in the Middle-west region of Brazil, once geoclimatic conditions favor its cultivation and underexplored species such as crambe, oilseed radish, and niger too. These species can be alternatives to eliminate the conflict between food and energy production, so the study aimed to evaluate and compare the fatty acids content of soybean, crambe, oilseed radish and niger oils by gas chromatography with flame ionization detector using two quantification methods, followed by multivariate statistical analysis to determine the similarity between the selected species and to provide safe information for the best selection and application of these oilseeds. The oil content in crambe, oilseed radish and niger seeds were 44.7% (m/m), 42.45% (m/m) and 28.19% (m/m), respectively. The major fatty acid in niger and soybean oils was linoleic acid (66.9% and 52.07% m/m, respectively), in crambe and oilseed radish was erucic acid (65.29% and 33.54% m/m, respectively). In addition, for saturated fatty acids, the presence is minor (<17%), except for niger seeds with 19.5% (m/m). Niger oil has greater similarity with soybean oil, whereas crambe and oilseed radish oils are more similar to each other. In this way, it was possible to discriminate the different fatty acids present in the oil samples by the proposed method contributing to the objective of the study and enabling better decision-making in the context like biofuels production.","PeriodicalId":19680,"journal":{"name":"Orbital: The Electronic Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48819488","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

Development and Implementation of Augmented Reality-Based Card Game Learning Media with Environmental Literacy in Improving Students' Understanding of Carbon Compounds 基于增强现实的具有环境素养的纸牌游戏学习媒体的开发和实施，以提高学生对碳化合物的理解

IF 0.6

Orbital: The Electronic Journal of Chemistry Pub Date : 2023-07-14 DOI: 10.17807/orbital.v15i2.17617

Ananta Ardyansyah, Sri Rahayu

{"title":"Development and Implementation of Augmented Reality-Based Card Game Learning Media with Environmental Literacy in Improving Students' Understanding of Carbon Compounds","authors":"Ananta Ardyansyah, Sri Rahayu","doi":"10.17807/orbital.v15i2.17617","DOIUrl":"https://doi.org/10.17807/orbital.v15i2.17617","url":null,"abstract":"The lack of knowledge integration about the learning environment is one of the causes of the low environmental awareness. The purpose of this study was to develop learning media for carbon compounds based on augmented reality and environmental literacy and to find out student learning outcomes after using media, students' perceptions of the media, and their environmental insight. This research is a research and development (R&D) research by following the ADDIE model. One group pre-test post-test research design was used to examine the effect of using the media. The research instruments were multiple choice test, questionnaires, and interviews which were developed independently and tested for validity & reliability. The analysis technique was the paired sample t-test and content analysis. The results of this study showed that the learning media was very eligible with a validation score reaching 88.1%. The result of the implementation of the final product of ChemiCa shows that there is an impact of using media on student learning outcomes (Sig. 0.000<0.05). Students' perception of the media are very good, learning media can increase their understanding of carbon compounds concepts, as well as their motivation to learn chemistry. This study implies that teachers can use augmented reality-based card game as a supplementary learning media to improve students’ understanding of others relevant chemistry concepts and their environment literacy.","PeriodicalId":19680,"journal":{"name":"Orbital: The Electronic Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42164609","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

Structural, Morphological and Physical Characterization of Carbon Fly Ash 碳粉煤灰的结构、形态和物理特性

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Orbital: The Electronic Journal of Chemistry Pub Date : 2023-07-14 DOI: 10.17807/orbital.v15i2.18260

Ricardo Parra, C. Carvajal, J. G. Cuaspud

{"title":"Structural, Morphological and Physical Characterization of Carbon Fly Ash","authors":"Ricardo Parra, C. Carvajal, J. G. Cuaspud","doi":"10.17807/orbital.v15i2.18260","DOIUrl":"https://doi.org/10.17807/orbital.v15i2.18260","url":null,"abstract":"Carbon fly ash (CFA) is the principal industrial waste byproduct from the burning fossil fuel (coal combustion) for the thermal generation of electricity. CFA is a gray or black powdery solid that is constituted mostly metal oxides (Al, Si Fe and Ca), unburned carbon (UC) and other inorganic substance. The management of fly ash has thus been a matter of concern given the requirement of the large area of land for its disposal and potential of causing pollution of air, water, land and effects on human health. Physical and chemical characteristics of fly ash is important, as these characteristics influence its subsequent use and disposal. X-ray diffraction, and fluorescence, scanning microscopy with an energy dispersive spectroscopy, FTIR, BET was the common techniques employed to characterize FA. Characterization by XRD analysis identified the presence of quartz, mullite and sillimanite phases; while the FTIR results allowed the identification of vibrational bands, characteristic of Si-O-Si and Si-O bonds. The EDS analysis coupled to SEM allowed verifying that the composition of the samples is consistent with the results sought and that the morphological characteristics validate the proposed methodology. Surface area analyses (BET) showed that the fly ash possess an active area of 6.02 m2 · g-1. \u0000 ","PeriodicalId":19680,"journal":{"name":"Orbital: The Electronic Journal of Chemistry","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43496683","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

1,2-O-Isopropylidene-3-O-butylglucofuranose-derived Ester, and Ether: Synthesis, Characterization, and Antimicrobial Study 1,2-O-亚异丙基-3-O-丁基呋喃葡萄糖酯和醚的合成、表征和抗菌研究

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Orbital: The Electronic Journal of Chemistry Pub Date : 2023-07-13 DOI: 10.17807/orbital.v15i2.18152

Tasnim Rahman Anisa, M. Islam, M. Islam, M. Matin

引用次数: 0

Studies on the Optical and Photoelectric Properties of Anthocyanin and Chlorophyll as Dihybrid Sensitizer in Dye Sensitized Solar Cell (DSSC) 染料敏化太阳能电池(DSSC)中花青素和叶绿素双杂化敏化剂的光学光电特性研究

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Orbital: The Electronic Journal of Chemistry Pub Date : 2023-07-12 DOI: 10.17807/orbital.v15i2.17854

H. Jaafar, L. Magesvaran, N. Ameram, Arlina Ali

引用次数: 1

Green Synthesis and Anti-microbial Activities of Some Thiazole-imino Derivatives 噻唑亚胺衍生物的绿色合成及其抗菌活性

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Orbital: The Electronic Journal of Chemistry Pub Date : 2023-07-11 DOI: 10.17807/orbital.v15i2.17611

Satbir Singh, S. Raj, Sunil V Sharma, Sucheta, V. Yadav

引用次数: 1

Cooperation of Peripheral Hydrogen Atoms for the Stabilization of Aachno-pentaborane (11) with Small Molecules: Hydrogen Bonds and Dihydrogen Bonds 周边氢原子对Aachno-pentaborane(11)小分子稳定性的协同作用:氢键和二氢键

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Orbital: The Electronic Journal of Chemistry Pub Date : 2023-07-01 DOI: 10.17807/orbital.v15i2.16800

Maryam Salehnassaj, M. Nikoorazm, A. Zabardasti, H. Goudarziafshar, B. G. Oliveira

引用次数: 0