Jurnal Akademika Kimia最新文献_第10页

Copigmentation of Flavonoids of the Gadung Mango Bark (Mangifera Sp) as a Coloring Substance 甘东芒果皮黄酮类化合物作为着色物质的共色素化研究

Jurnal Akademika Kimia Pub Date : 2021-11-30 DOI: 10.22487/j24775185.2021.v10.i4.pp260-268

Mohamad Sahril, V. Tiwow, Afadil Afadil

引用次数: 0

Analysis of Students' Skills through Practicum on Reaction Rate Topic 反应速率专题实习对学生技能的分析

Jurnal Akademika Kimia Pub Date : 2021-11-30 DOI: 10.22487/j24775185.2021.v10.i4.pp247-253

Hayatul Islam, R. Ratman

{"title":"Analysis of Students' Skills through Practicum on Reaction Rate Topic","authors":"Hayatul Islam, R. Ratman","doi":"10.22487/j24775185.2021.v10.i4.pp247-253","DOIUrl":"https://doi.org/10.22487/j24775185.2021.v10.i4.pp247-253","url":null,"abstract":"National education emphasizes learning on assessing students' knowledge, attitudes, and skills. The development of skills aspect is not enough only relying on the learning in the classroom, but also necessary doing understanding outside the classroom such as practicum in the laboratory. The implementation of training allows students to practice their skills and help students understand the material taught in the class. This study aimed to describe the quality of students' skills on reaction rate topics through a practicum in grade XI at SMA Negeri 5 Palu. This type of research was a quantitative descriptive study with a one-shot case study design. Sampling was conducted by purposive sampling. The sample was Class XI Science 2 as the experimental class 1 with 23 students and Class XI Science 3 as the experimental class 2 with 25 students. The quality skill of students was measured by instruments in the form of observation sheets as the primary data. The data obtained through the observation sheet showed that the average percentage of all aspects of student skills in experimental class 1 was 74.81%, and in experimental class 2 was 74.05%. It indicates that the ten skills elements have emerged in the learning activities with a good category. This study concludes that the quality skill of grade XI students at SMA Negeri 5 Palu on learning reaction rate topic through practicum is a good category.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74741197","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

Analysis of Lycopene Content and Antioxidant Activity Test of Katokkon Chili Extract (Capsicum chinense Jacq) Katokkon辣椒提取物番茄红素含量分析及抗氧化活性试验

Jurnal Akademika Kimia Pub Date : 2021-11-30 DOI: 10.22487/j24775185.2021.v10.i4.pp224-229

Febryna V. Maddo, S. Aminah, Afadil Afadil

{"title":"Analysis of Lycopene Content and Antioxidant Activity Test of Katokkon Chili Extract (Capsicum chinense Jacq)","authors":"Febryna V. Maddo, S. Aminah, Afadil Afadil","doi":"10.22487/j24775185.2021.v10.i4.pp224-229","DOIUrl":"https://doi.org/10.22487/j24775185.2021.v10.i4.pp224-229","url":null,"abstract":"This study aimed to determine lycopene contents and the antioxidant activity of katokkon chili extract. The extraction process of katokkon chili used the maceration method with the mixture of n-hexane : acetone : ethanol (2:1:1). The concentrated extract of katokkon chili was obtained through the evaporator process at a temperature of 40 ˚C. The analysis process used a UV-Vis spectrophotometer in which the absorbance reading was at λ = 472 nm. The average content of lycopene in katokkon chili extract was 1.457 mg/100g. Testing the antioxidant activity of katokkon chili extract used the DPPH (2,2-diphenyl-1-picrylhydrazyl) method with positive control the vitamin C. The absorbance readings for the antioxidant activity test were at λ = 517 nm. The test results showed that the antioxidant power of katokkon and vitamin C extracts in reducing DPPH free radicals had a similar result which was equally strong. The IC50 value for chili katokkon extract was 13.84 mg/L, and the IC50 value for vitamin C was 5.78 mg/L, so it can be concluded that chili katokkon can be an alternative source of natural antioxidants to replace vitamin C.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78886524","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: 2

Adsorption Capacity of Activated Charcoal Made of Rice Husk on Cd(II) Metal Ions 稻壳活性炭对Cd(II)金属离子的吸附性能

Jurnal Akademika Kimia Pub Date : 2021-11-30 DOI: 10.22487/j24775185.2021.v10.i4.pp213-218

E. Widyasari, S. Supriadi, I. Said

引用次数: 0

The Utilization of Acid as a Color Stabilizer in the Extraction of Anthocyanins from the Lakum (Cayratia trifolia L.) Peel 酸作为颜色稳定剂在三叶草花青素提取中的应用皮

Jurnal Akademika Kimia Pub Date : 2021-11-30 DOI: 10.22487/j24775185.2021.v10.i4.pp254-259

Aryo E. Peluru, P. H. Abram

引用次数: 1

Influence of the Guided Inquiry Learning Model Assisted by a Two-stay Two Stray towards Chemistry Learning Outcomes of High School Students 双停留双偏辅助的引导式探究学习模式对高中生化学学习成果的影响

Jurnal Akademika Kimia Pub Date : 2021-11-30 DOI: 10.22487/j24775185.2021.v10.i4.pp208-212

Dahlia Sofiyatun, M. R. Jura, S. Sabang

{"title":"Influence of the Guided Inquiry Learning Model Assisted by a Two-stay Two Stray towards Chemistry Learning Outcomes of High School Students","authors":"Dahlia Sofiyatun, M. R. Jura, S. Sabang","doi":"10.22487/j24775185.2021.v10.i4.pp208-212","DOIUrl":"https://doi.org/10.22487/j24775185.2021.v10.i4.pp208-212","url":null,"abstract":"This study aimed to determine the influence of the guided inquiry learning model assisted by two stay two stray toward learning outcomes of students on chemistry at SMA 7 Palu. The type of study was Pre-experimental with a one-shot case study design. The sample was prepared using the purposive sampling technique with a sample consisting of Class XI Science 4 as the experimental class 1, and Class XI Science 2 as the experimental class 2. Both classes consisted of 28 students. The research instruments were the learning outcomes tests, student worksheets, and observation sheets that have been validated theoretically and empirically. Data of learning outcomes was analyzed using inferential statistical analysis with a prerequisite test: normality, homogeneity, and t-test hypothesis test (right side). The results showed that the average learning outcomes for experimental class 1 was 62.32, and for experimental class 2 was 50.29, with standard deviations of 12.58 and 12.05, respectively. Hypothesis test obtained tcount>ttable or 4.04 > 1.67, so H1 is accepted. The average learning outcomes of students in the experimental class 1 with guided inquiry learning model assisted by two stay two stray is higher than in the experimental class 2 with a guided inquiry learning model. Guided inquiry learning model assisted by two stay two stray influences learning outcomes of students at SMA 7 Palu.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76951778","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

Application of Clove Leaf Oil (Syzygium aromaticum L.) on Preservation of Milkfish (Chanos chanos) 丁香叶油在遮目鱼保鲜中的应用

Jurnal Akademika Kimia Pub Date : 2021-11-30 DOI: 10.22487/j24775185.2021.v10.i4.pp218-223

Rukmawati Rukmawati, D. K. Walanda, I. Said

{"title":"Application of Clove Leaf Oil (Syzygium aromaticum L.) on Preservation of Milkfish (Chanos chanos)","authors":"Rukmawati Rukmawati, D. K. Walanda, I. Said","doi":"10.22487/j24775185.2021.v10.i4.pp218-223","DOIUrl":"https://doi.org/10.22487/j24775185.2021.v10.i4.pp218-223","url":null,"abstract":"Clove leaf oil (Syzygium aromaticum L.) is obtained from distilling clove leaves. This study aimed to examine the effect of clove leaf oil on the preservation of milkfish meat. Clove leaf oil was obtained by steam distillation and purified by a simple distillation method. The number of microbes was determined using the total plate count (TPC) method, while the organoleptic test used a level of preference for color, smell, texture, and taste. The results showed that the pH and the number of fish meat bacteria at a concentration of 8%, when left for one day, were 6.61 and 2.46 × 10-7 CFU/mL, while the three days was 7.2 and 2.98 × 10-7 CFU/mL, a concentration of 10% in 1 day which was 6.64 and 2.03×10-7 CFU/mL while the three days was 7.25 and 2.54 × 10-7 CFU/mL and a concentration of 12 % in 1 day was 6.67 and 1.83 × 10-7 CFU/mL while three days was 7.57 and 2.07 × 10-7 CFU/mL, besides that from organoleptic test data the panelist preference rate was more significant in the concentration of 12 % then the concentration of 10 and 8 %, respectively. The results showed that at a concentration of 12%, it was a good concentration to be used as preservation compared to a concentration of 10 % and a concentration of 8%, both for a 1-day and a 3-days. This shows that the higher the concentration of clove leaf oil, the greater the ability to preserve fish meat.","PeriodicalId":17695,"journal":{"name":"Jurnal Akademika Kimia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76124468","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

SISTEM INFORMASI PENGOLAHAN DATA PASIEN PADA PUSKESMAS TENAM MUARA BULIAN 系统信息处理病人的数据在布里安排气管

Jurnal Akademika Kimia Pub Date : 2021-11-24 DOI: 10.53564/akademika.v14i1.715

Ahmad Louis, Febi Reka Silvia

引用次数: 0

E-COMMERCE PADA CV. ANUGERAH PRATAMA PRESS

Jurnal Akademika Kimia Pub Date : 2021-11-24 DOI: 10.53564/akademika.v14i1.721

Windy Adriana, Dede Suharman

引用次数: 0

SISTEM INFORMASI ADMINISTRASI MAKAM BERBASIS WEBSITE PADA UPTD PEMAKAMAN DINAS PERUMAHAN RAKYAT DAN KAWASAN PERMUKIMAN KOTA JAMBI 以社区住房服务和JAMBI居民区为基础的坟墓管理信息系统

Jurnal Akademika Kimia Pub Date : 2021-11-24 DOI: 10.53564/akademika.v14i1.705

J. Surya, N. Apriyanti

引用次数: 0