Proceedings of the National Seminar on Chemistry 2019 (SNK-19)最新文献_第5页

Study of Surface Plasmon Resonance of Gold Nanoparticles Stabilized by L-arginine l -精氨酸稳定金纳米粒子表面等离子体共振的研究

Proceedings of the National Seminar on Chemistry 2019 (SNK-19) Pub Date : 1900-01-01 DOI: 10.2991/snk-19.2019.24

Amaria Amaria, D. K. Maharani, M. M. Sianita

{"title":"Study of Surface Plasmon Resonance of Gold Nanoparticles Stabilized by L-arginine","authors":"Amaria Amaria, D. K. Maharani, M. M. Sianita","doi":"10.2991/snk-19.2019.24","DOIUrl":"https://doi.org/10.2991/snk-19.2019.24","url":null,"abstract":"- Gold nanoparticles (AuNP) capped by L-arginine have been synthesized. In this paper, we report the stability of nanoparticles observed for six weeks. In this study, gold nanoparticles were synthesized by reducing Au(III) to Au(0) using trisodium citrate and capping agent L-arginine as a stabilizer. The parameters of this study are the pH of the medium (5 and 10) and the concentration of-arginine (1, 2, and 5 mM). The stability of gold nanoparticles was studied from the position of the maximum wavelength intensity of the full-width half-maximum absorption from the surface plasmon resonance spectra measured by UV-vis spectrophotometer. The results showed that gold nanoparticles were successfully synthesized by the appearance of a ruby red solution. The spectra of surface plasmon resonance AuNP-arg pH 10 shows sharper than pH 5. Gold nanoparticles (AuNP) can be stabilized using L-arginine at concentrations of 1-2.5 mM under pH 10. AuNP stabilized amino acid L-arginine was shown for a period of six weeks through the study of position changes of λ max , peak intensity and a full-width half-maximum of surface resonance plasmon spectra. These results prove that AuNP-arg can be used in commercial applications, as sensors or in the medical and cosmetic fields.","PeriodicalId":256735,"journal":{"name":"Proceedings of the National Seminar on Chemistry 2019 (SNK-19)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128351361","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

The Effect of Curing and Extraction Time against Yield and Quality of Type B Gelatin from Goat Bone 固化和提取时间对羊骨明胶得率和品质的影响

Proceedings of the National Seminar on Chemistry 2019 (SNK-19) Pub Date : 1900-01-01 DOI: 10.2991/snk-19.2019.2

A. Bahar, R. Rusijono, N. Kusumawati

引用次数: 1

Extraction and Application of Natural Dyes from Brazilwood and Water guava leaves 巴西木和水番石榴叶天然染料的提取与应用

Proceedings of the National Seminar on Chemistry 2019 (SNK-19) Pub Date : 1900-01-01 DOI: 10.2991/snk-19.2019.10

N. Kusumawati, Samik Samik, S. Muslim

引用次数: 1

Determination of Ellagic Acid Compound Activity as Anti Breast Cancer 鞣花酸化合物抗乳腺癌活性的测定

Proceedings of the National Seminar on Chemistry 2019 (SNK-19) Pub Date : 1900-01-01 DOI: 10.2991/snk-19.2019.19

I. Sanjaya, Defitiana Wanita

引用次数: 0

Students’ Misconceptions on Understanding Corrosion Topic by and without Analogy 学生对腐蚀问题的理解误区

Proceedings of the National Seminar on Chemistry 2019 (SNK-19) Pub Date : 1900-01-01 DOI: 10.2991/snk-19.2019.31

F. Asih, S. Ibnu, S. Suyono, Suhadi Suhadi

{"title":"Students’ Misconceptions on Understanding Corrosion Topic by and without Analogy","authors":"F. Asih, S. Ibnu, S. Suyono, Suhadi Suhadi","doi":"10.2991/snk-19.2019.31","DOIUrl":"https://doi.org/10.2991/snk-19.2019.31","url":null,"abstract":"Redox reactions is spontaneous which can produce electrons flow. This condition can make corrosion of ferrum metal.. The electrons flow is not observed (submicroscopic aspect), so requires visualization. Strategy for visualizing submicroscopic aspect is analogy learning. The electrons flow can be analogous by the flow of waterfall. This research aims to examine the effect of analogy on the achievement of students’ understanding. The research used quasy experiment method with a nonequivalent posttest only control group design, so that there were an inquiry class by analogy (ICBA) and an inquiry class without analogy (ICWA). The results of mann whitney u test, u count = 313.5 were smaller than u table 526, so there was a significant difference between two classes, with a higher mean rank in ICBA. However students on ICBA were identified as having a specific misconception (SM) on several concepts of corrosion. The percentage of students on ICBA who have SM on the concept of voltaic series, prediction of metal rust, prevention of corrosion through metal coating, and cathodic protection were 46.67%, 46.67%, 66.67%, and 56.67%. The analog concept is not well understood by students, so potentially brings up SM. Analogies requires the students’ reason ability, because students conclude the submicroscopic aspects of corrosion through analyzing similarity and difference between analogous concept and target concept. In other words, analogy learning was giving submicroscopic aspect by indirect visualization. The results of other researches indicate that the reasoning ability of high school students is still low. The reasoning process requires students’ ability to analyze and conclude submicroscopic aspects of corrosion topic. A literation study of the reasoning ability of high school students is needed to explain the occurrence of SM, even though they have been given indirect visualization by analogy. Keywords—Analogy, Misconception, Reasoning Ability,","PeriodicalId":256735,"journal":{"name":"Proceedings of the National Seminar on Chemistry 2019 (SNK-19)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121021981","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

Adsorption of copper metal waste in prototypes on a laboratory scale 在实验室规模的原型中吸附铜金属废物

Proceedings of the National Seminar on Chemistry 2019 (SNK-19) Pub Date : 1900-01-01 DOI: 10.2991/snk-19.2019.11

N. Herdyastuti, R. Rusmini, S. E. Cahyaningrum

引用次数: 0

Validity of Interactive Multimedia with 3D Visualization to Practice the Spatial Visual Intelligence of Class X High School Students on Metallic Bonding Materials 三维可视化交互式多媒体对高中X班学生金属键合材料空间视觉智能锻炼的有效性

Proceedings of the National Seminar on Chemistry 2019 (SNK-19) Pub Date : 1900-01-01 DOI: 10.2991/snk-19.2019.33

Irvandar Nurviandy, Kusumawati Dwiningsih, Ahlan Riwahyu Habibi, Akhmad Fitriadi Akbar

{"title":"Validity of Interactive Multimedia with 3D Visualization to Practice the Spatial Visual Intelligence of Class X High School Students on Metallic Bonding Materials","authors":"Irvandar Nurviandy, Kusumawati Dwiningsih, Ahlan Riwahyu Habibi, Akhmad Fitriadi Akbar","doi":"10.2991/snk-19.2019.33","DOIUrl":"https://doi.org/10.2991/snk-19.2019.33","url":null,"abstract":"This study aims to determine the validity of Interactive Multimedia with 3D Visualization to Train the Spatial Visual Intelligence of Class X High School Students on Metallic Bonding Materials. Validity is tested through quality of content and goals, instructional quality, and technical quality. Development is carried out using the ADDIE model (Analysis, Design, Development or Production, Implementation or Delivery and Evaluations). This research is limited only in 3 stages, namely Analysis, Design, and Development. Interactive multimedia is said to be valid if the minimum achievement level scores in the range 61-80 with good qualifications based on the eligibility criteria and product revisions which are adaptations of Siti Muriati, 2013. Based on the analysis that has been done, it is found that interactive multimedia with 3D visualization developed is stated valid with an average percentage of content validation by material experts that is 96% and construct validation by material experts that is 91.82% are in the feasible category with a very good predicate. Thus, the results of this study indicate that interactive multimedia with 3D visualization on metal bonding material can be declared valid.","PeriodicalId":256735,"journal":{"name":"Proceedings of the National Seminar on Chemistry 2019 (SNK-19)","volume":"2002 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127400362","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: 3

The Effect Of Using Atomic Models Interactive Multimedia Flash Based On Students Learning Outcomes 使用原子模型交互式多媒体Flash对学生学习效果的影响

Proceedings of the National Seminar on Chemistry 2019 (SNK-19) Pub Date : 1900-01-01 DOI: 10.2991/snk-19.2019.43

Sihaqqul Firdaus, R. Hidayah

引用次数: 2

Reading, Questioning, and Answering (RQA) Strategies’: an Alternative to Empowering Undergraduate Student Thinking Abilities 阅读、提问和回答(RQA)策略:增强大学生思维能力的另一种选择

Proceedings of the National Seminar on Chemistry 2019 (SNK-19) Pub Date : 1900-01-01 DOI: 10.2991/snk-19.2019.32

H. Nasrudin, U. Azizah

{"title":"Reading, Questioning, and Answering (RQA) Strategies’: an Alternative to Empowering Undergraduate Student Thinking Abilities","authors":"H. Nasrudin, U. Azizah","doi":"10.2991/snk-19.2019.32","DOIUrl":"https://doi.org/10.2991/snk-19.2019.32","url":null,"abstract":"—Reading, Questioning, and Answering (RQA) is a constructivist based learning strategy. The implementation of RQA can motivate undergraduate students to read the assigned material and have an impact on improving the understanding of learning material. This study aims to describe undergraduate students' thinking abilities in the Authentic Assessment of Knowledge, Skills, and Attitude material in the Process and Learning Outcomes Assessment of Chemistry (PLOAC) subject through the implementation of RQA-based textbooks. The design used is One Group Pretest-Posttest Design. This research was carried out in the chemistry department of Universitas Negeri Surabaya with the subjects of 25 undergraduate students. The results showed that: (1) Based on Bloom's taxonomy in Krathwohl's version, thinking ability obtain the percentage of undergraduate student achievement on each cognitive dimension include apply (C3) of 92.00, analyze (C4) of 68.00, and create (C6) of 86.67; and (2) N-gain scores for each cognitive dimension of thinking ability obtained have medium and high criteria. Based on the results of the study, the RQA strategy can be used as an alternative to empower undergraduate students' thinking ability.","PeriodicalId":256735,"journal":{"name":"Proceedings of the National Seminar on Chemistry 2019 (SNK-19)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131031901","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: 3

Increased Storage and Nutrition Content of Processed Foods through Vacuum Packaging 通过真空包装提高加工食品的储存和营养含量

Proceedings of the National Seminar on Chemistry 2019 (SNK-19) Pub Date : 1900-01-01 DOI: 10.2991/snk-19.2019.7

N. Purwidiani, P. Setiarso, N. Kusumawati

引用次数: 0