EduChemia最新文献_第2页

Analysis of the Lead on Lip Tint Cosmetics on the Market Using UV-Vis Spectrophotometry Method 用紫外可见分光光度法分析市售唇彩化妆品中的铅

EduChemia Pub Date : 2020-01-30 DOI: 10.30870/EDUCHEMIA.V5I1.7598

G. A. Wardani, Siti Laila Abiya, Fajar Setiawan

引用次数: 0

Isolation and Characterization of Pectin from Waste of “Raja Nangka” Banana Peels (Musa acuminata (AAA cv)) “Raja Nangka”香蕉果皮废弃物中果胶的分离与表征

EduChemia Pub Date : 2020-01-30 DOI: 10.30870/EDUCHEMIA.V5I1.6737

M. Putri, Prima Agusti Lukis, Leny Putri Mawarni

{"title":"Isolation and Characterization of Pectin from Waste of “Raja Nangka” Banana Peels (Musa acuminata (AAA cv))","authors":"M. Putri, Prima Agusti Lukis, Leny Putri Mawarni","doi":"10.30870/EDUCHEMIA.V5I1.6737","DOIUrl":"https://doi.org/10.30870/EDUCHEMIA.V5I1.6737","url":null,"abstract":"Raja nangka banana peel contains pectin (10-21%), lignin (6-12%), and galacturonic acid. Pectin is a D -galacturonic acid polymer which connected with the β -1,4-glycosidic bond. Pectin was benefitted a gel form material and thickener making jam and low-calorie food. Pectin was generated with an isolation process. The purpose of this research was isolated and characterized pectin from raja nangka banana peel waste, and then pectin was obtained characterized for know pectin quality. Pectin isolation was done with the reflux extraction method. Pectin extraction uses chloric acid 1 N solvents. Pectin isolation was done at pH 1,5 temperature 90 ° C for 80 minutes. The purpose of testing for the function group was known as groups in pectin isolation. The functional group in pectin was got and then characterized with FTIR to show group vibration OH, CH 3 , C=O, C-H-, and R-O-R, with a wavelength respectively 3.448,366; 2.930,022; 1649,310; 1385,247 and 1146,453. Other than, pectin physical nature was done such as water content (0,061%), ash content (1,994%), equivalent weight (748,29%), methoxyl content (6,90%), galacturonic acid (250,88%) and esterification degree (0,0156%). Pectin characterization was got correct with pectin quality standard based on IPPA (International Pectin Producers Association).","PeriodicalId":55717,"journal":{"name":"EduChemia","volume":"5 1","pages":"60-71"},"PeriodicalIF":0.0,"publicationDate":"2020-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46488983","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

Natural Dyes Characterization of Local Plants as Acid-Base Indicator 天然染料作为酸碱指示剂对当地植物的表征

EduChemia Pub Date : 2020-01-30 DOI: 10.30870/EDUCHEMIA.V5I1.7512

Nelly Dayanti, Silpia Vilda Saputri, Arit Arit, R. Muharini, M. Masriani

{"title":"Natural Dyes Characterization of Local Plants as Acid-Base Indicator","authors":"Nelly Dayanti, Silpia Vilda Saputri, Arit Arit, R. Muharini, M. Masriani","doi":"10.30870/EDUCHEMIA.V5I1.7512","DOIUrl":"https://doi.org/10.30870/EDUCHEMIA.V5I1.7512","url":null,"abstract":"Hanjuang, mangosteen, putat, and tabelian plants are used by people of Lanjak deras Village as natural dyes for woven cloth and food so that they can be used as an alternative substitute synthesis indicators that are limited in a remote area. The purpose of the study is to determine the best type of solvent in extracting the samples, pH range, UV spectrum profiles, precision, and accuracy of the plant's extract as indicator. The sample was the plants that are used by the people of West Borneo as natural dyes, namely putat flower, tebelian stem, mangosteen leave, and hanjuang leave. Each sample was macerated with four types of solvents, namely aquadest, ethanol, methanol, and (1:1) ethanol:methanol, then the extract was testing by pH range. The extracts providing color changes were determined for its UV-Vis spectrum profile, stability, accuracy, and precision. The results showed that ethanol and methanol were suitable for extracting mangosteen leaves, methanol for putat flowers, ethanol for hanjuang leaves, and (1: 1) ethanol:methanol for tebelian stems. Mangosteen leaf extract, putat flower, and tebelian stem gave a pH range of 12-14, while hanjuang leaf extract did not change color. The phytochemical test results and UV spectrum profile of mangosteen leaf extract, putat flower, and tebelian stem indicated the presence of phenolic compounds. The powder and extract solution had high stability. Mangosteen leaf extract, putat flower, and tebelian stem had precision and accuracy with the medium category. These data indicated that mangosteen leaf extract, putat flower, and tebelian stem have potential as indicators of acid-base.","PeriodicalId":55717,"journal":{"name":"EduChemia","volume":"5 1","pages":"72-86"},"PeriodicalIF":0.0,"publicationDate":"2020-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49387823","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

The Quality of Selvo E-Modules as Learning Media on The Topic Of Voltaic Cells Selvo电子模块作为学习媒体的质量——关于电压电池的主题

EduChemia Pub Date : 2020-01-30 DOI: 10.30870/EDUCHEMIA.V5I1.7218

R. Aisyah, I. Wijayanti, S. Aisyah

引用次数: 2

Development of Students Worksheet Chemical Bond Based On Learning Cycle 7E 基于学习周期的学生工作表化学键的开发

EduChemia Pub Date : 2020-01-30 DOI: 10.30870/EDUCHEMIA.V5I1.6732

Utari Oktavianti, A. M. Noer, S. LennyAnwar

引用次数: 2

Analysis of Borax in Ground Red Chilies in the Traditional Markets of Jambi City 占碑市传统市场红辣椒中硼砂的分析

EduChemia Pub Date : 2020-01-30 DOI: 10.30870/EDUCHEMIA.V5I1.6520

Havizur Rahman, Mia Prajuwita, Dika Zamri Yanni, Putri Maya Sari, I. Lestari

引用次数: 0

Application of Dry Biomass of Aphanothece sp. as A Biosorbent of Copper Heavy Metal 干生物量作为铜重金属生物吸附剂的应用

EduChemia Pub Date : 2020-01-30 DOI: 10.30870/EDUCHEMIA.V5I1.7246

F. Abdilah, L. Troskialina

引用次数: 1

In-Silico Analysis of the BDNF (Brain Derived Neurotrophic Factor) Protein of Pigeon (Columba livia) 鸽子BDNF（脑源性神经营养因子）蛋白的原位杂交分析

EduChemia Pub Date : 2020-01-30 DOI: 10.30870/EDUCHEMIA.V5I1.6763

Nina Kirana, I. Budiarsa, I. N. Kundera, Mohammad Jamhari

引用次数: 0

Analisis Struktur Kognitif Siswa Dengan Metode Flowmap Dalam Materi Asam Basa Menggunakan Model Learning Cycle 8E 使用第8E学习周期模型，用碱酸材料中浮动图方法分析学生的认知结构

EduChemia Pub Date : 2018-01-30 DOI: 10.30870/EDUCHEMIA.V3I1.1849

Elsa Mahardika, Nurbaity Nurbaity, Achmad Ridwan, Yuli Rahmawati

{"title":"Analisis Struktur Kognitif Siswa Dengan Metode Flowmap Dalam Materi Asam Basa Menggunakan Model Learning Cycle 8E","authors":"Elsa Mahardika, Nurbaity Nurbaity, Achmad Ridwan, Yuli Rahmawati","doi":"10.30870/EDUCHEMIA.V3I1.1849","DOIUrl":"https://doi.org/10.30870/EDUCHEMIA.V3I1.1849","url":null,"abstract":"Penelitian kualitatif ini bertujuan untuk menganalisis struktur kognitif siswa kelas XI dengan metode flow map dalam materi asam basa menggunakan model pembelajaran Learning Cycle 8E. Subjek penelitian adalah 36 siswa kelas XI MIA 4 SMA N 54 Jakarta. Teknik pengumpulan data dilakukan melalui instrumen tes pemahaman, wawancara, flow map , observasi, reflektif jurnal dan lembar kerja siswa. Hasil penelitian menunjukan bahwa siswa membangun struktur kognitif berdasarkan pemahaman dan pengalaman siswa. Model pembelajaran Learning Cycle 8E memiliki dampak terhadap perkembangan struktur kognitif dan softskill siswa. Berdasarkan hasil penelitian, terlihat bahwa selama mengikuti model pembelajaran Learning Cycl e 8E persentase siswa yang mengalami miskonsepsi menurun dan pesentase siswa yang paham meningkat Hal ini membuktikan bahwa model pembelajaran Learning Cycle 8E dapat mengatasi miskonsepsi siswa. Model pembelajaran model pembelajaran Learning Cycl e 8E juga berdampak terhadap perkembangan softskill siswa. Berdasarkan hasil penelitian diperoleh bahwa siswa sudah menerapkan sikap menghormati dan menghargai temanya dalam menghadapi perbedaan pendapat.","PeriodicalId":55717,"journal":{"name":"EduChemia","volume":"3 1","pages":"51-65"},"PeriodicalIF":0.0,"publicationDate":"2018-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43590714","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: 9

Pengembangan Metode Penentuan Kadar Neotam dalam Sediaan Obat dengan Spektrofotometri UV 用紫外线光谱测定药物剂型的新化学方法的发展

EduChemia Pub Date : 2018-01-30 DOI: 10.30870/EDUCHEMIA.V3I1.2052

Dewi Kurnia, Anne Yuliantini, Dian Faizal

{"title":"Pengembangan Metode Penentuan Kadar Neotam dalam Sediaan Obat dengan Spektrofotometri UV","authors":"Dewi Kurnia, Anne Yuliantini, Dian Faizal","doi":"10.30870/EDUCHEMIA.V3I1.2052","DOIUrl":"https://doi.org/10.30870/EDUCHEMIA.V3I1.2052","url":null,"abstract":"Neotam merupakan pemanis sintetis yang baru muncul di pasaran pada tahun 2002. Neotam sering digunakan pada industri farmasi sebagai eksipien obat karena tidak memiliki nilai kalori dan terbukti aman dikonsumsi oleh penderita gangguan fenilketonuria, diabetes dan wanita.hamil. Penelitian ini bertujuan sebagai metode alternatif penentuan neotam dalam sediaan obat secara spektrofotometri UV. Tahapan penelitian yang dilakukan yaitu uji kualitatif, optimasi panjang gelombang, validasi metode dan penetapan kadar neotam dalam sampel obat. Analisis kualitatif dilakukan menggunakan KLT dengan silika gel GF 254 60 dan eluen n-butanol, asam asetat glasial, aquadest (6:1:1) menunjukkan hasil yang positif. Analisis kuantitatif dilakukan menggunakan spektrofotometri UV pada panjang gelombang 210 nm. Dari hasil validasi, didapatkan persamaan regresi kurva kalibrasi y = 0,0229x + 0,0335 dengan nilai koefisien korelasi (r) 0,9959; batas deteksi dan kuantisasi berturut-turut sebesar 1,2 bpj dan 4,2 bpj; nilai persen perolehan kembali sebesar 100,7 % dengan nilai SBR interday dan intraday berturut-turut 0,64% dan 1,4%. Hasil pengukuran terhadap sampel obat menunjukkan kadar neotam sebesar 0,09 mg/tablet. Hasil ini dinyatakan masih memenuhi persyaratan BPOM, yaitu maksimum penggunaan perhari < 2 mg/kg berat badan. Berdasarkan hasil peneltian, dapat disimpulkan bahwa penetapan kadar neotam dalam sampel obat dapat dilakukan dengan metode spektrofotometri UV.","PeriodicalId":55717,"journal":{"name":"EduChemia","volume":"3 1","pages":"66-76"},"PeriodicalIF":0.0,"publicationDate":"2018-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43883639","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