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Journal Of Research and Education Chemistry (JREC)
Published by Universitas Islam Riau
ISSN : 26858967     EISSN : 26858959     DOI : https://doi.org/10.25299/jrec.2022.vol4(1).9315
Core Subject : Science, Education, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Education
1. research and reviews literature about chemistry education such as : instruction, learning and theaching, curriculum development, learning environment, theacher education, educational and educational development in chemistry education 2. research and review literature about chemistry such as : organic, inorganic physical, analitycal, biochemistry, material chemistry, environment, ethnochemistry and its application in teaching and learning
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 5 Documents
 1 
Search results for , issue "Vol. 2 No. 1 (2020): April" : 5 Documents clear
ANALISIS KUALITATIF KANDUNGAN BUNGA KENANGA (Cananga odorata) SECARA FITOKIMIA dengan MENGGUNAKAN PELARUT ETANOL Putri Ade Rahma Yulis; aisyah meiysa putri; Anasthasia oca muham; silvia anggraini; siti maisarmah
Journal of Research and Education Chemistry Vol. 2 No. 1 (2020): April
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (351.886 KB) | DOI: 10.25299/jrec.2020.vol2(1).4783

Abstract

Cananga (Cananga odorata) is a tree or shrub that can be used to produce essential oils. In this study a qualitative test was conducted to study the content of secondary metabolites in cananga flowers. Based on research results cananga flowers contain flavonoids, tannins, saponins and steroids, while anthraquinone and terpenoids are not needed. The existence of secondary metabolite content in this plant is intended to be used as a raw material needed because it has an active metabolite content that links this plant to have antioxidant and other antibacterial properties.
SINTESIS PERMUKAAN KACA HIDROFOBIK MELALUI KOMBINASI TiO2/ASAM STEARAT UNTUK APLIKASI MATERIAL SELF-CLEANING Diana Vanda Wellia; Febby Alvionita; Syukri Arief
Journal of Research and Education Chemistry Vol. 2 No. 1 (2020): April
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (810.57 KB) | DOI: 10.25299/jrec.2020.vol2(1).4800

Abstract

The surface of ultrahydrophobic glass has been successfully prepared using the combination of TiO2 and stearic acid. TiO2 was used to increase the surface roughness, while stearing acid was a surface modifier. The peroxo sol-gel method has been used to synthesize TiO2 precursors on the glass layer followed by modification of stearic acid. The maximal water contact angle of 141o has been obtained for the composition of 0.4 grams of stearic acid and 20 mL of ethanol (NKTS-2%). AFM analysis showed the roughness of NKTS-2% is 4,15 nm, which was greater than the pure glass. FTIR analysis also showed vibration of C=O (carbonyl) at 1697cm-1 indicating the chemical interaction between TiO2 and stearic acid. EDX spectrum analysis of TiO2/stearic acid (TiO2/C18H36O2) showed the existence of titanium, oxygen, and carbon. The optimum sample (NKTS-2%) showed a good transparency and self-cleaning properties compared to pure glass
REKAYASA STRUKTUR AKSEPTOR PADA ZAT WARNA ORGANIK TIPE D- π -A DENGAN KERANGKA TIOFEN Imelda Imelda
Journal of Research and Education Chemistry Vol. 2 No. 1 (2020): April
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (615.606 KB) | DOI: 10.25299/jrec.2020.vol2(1).4857

Abstract

This research study about tiofen based organic dyes with D-π-A type as sensitizer on DSSC. The dyes were varied with the acceptor chain and were given names of dyes 1 to 10. The dye with the smallest band gap was added with the electron withdrawing and donating groups. The computational study used the hyperchem package with the AM1 calculation method. The result showed that dye 8 has the smallest band gap is 4,9 eV and dipole moment is 9,3 D. The effect of adding Cl as an electron withrawing group (EWG) can reduce the band gap value to 4,7 eV. The conclusions are that dye 8 is more potential as sensitizer on DSSC and the addition of Cl as EWG can improve the light harvesting efficiency.
DESAIN DAN UJI COBA E-MODUL KIMIA BERBASIS PROBLEM SOLVING PADA MATERI LARUTAN PENYANGGA UNTUK KELAS XI SMA SEMESTER II: E-Modul Kimia Indah Julia
Journal of Research and Education Chemistry Vol. 2 No. 1 (2020): April
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (664.882 KB) | DOI: 10.25299/jrec.2020.vol2(1).4862

Abstract

Abstract The background of this research is due to the limited learning resources that are independent and the lack of learning resources that the connect of material with daily life.Thus, in this research it was designed a design and test of Problem-Solving based chemistry E-Module using Kvisoft Flipbook software on Buffer Solution lesson.This research was administered at SMA PGRI Pekanbaru. 4D development model was used in this research until Develop stage. The subjects of this research were a material validation, a media validation, and 1 teacher at the SMA PGRI Pekanbaru and 1teacher at the SMAN 5 Tapung to test the media practicality, and 10 students of SMA PGRI Pekanbaru were to know the response of the media to know the response of the media.The data were collected through interview and questionnaire. The obtained data then were analyzed by using qualitative and quantitative descriptive analysis techniques. Based on the research finding, it was obtained the assessment on material aspects 98.33% and by the media 95%, and they were on very valid criterion.The assessment percentage of student practicality test was 92.8% and the teacher was 93.5%, they were on very practical criterion. Keywords: E-Module, Problem Solving Approach, Kvisoft Flipbook, Buffer Solution
PENGARUH PENERAPAN PROJECT BASED LEARNING MELALUI GOOGLE CLASSROOM TERHADAP HASIL BELAJAR SISWA PADA MATERI LAJU REAKSI: PROJECT BASED LEARNING Widia Qholby; Lazulva
Journal of Research and Education Chemistry Vol. 2 No. 1 (2020): April
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (627.234 KB) | DOI: 10.25299/jrec.2020.vol2(1).4863

Abstract

The application of 2013 curriculum which has not been implemented perfectly become a problem in the learning process. This research aimed at knowing the effect of implementing Project Based Learning model with Google Classroom media toward student learning achievement on Chemistry subject, especially Reaction Rate lesson. It was an quasi experiment research with posttest only control group design. The eleventh-grade students of MIA were the population of this research. Random sampling was used in this research, and it was obtained the eleventh-grade students of MIA 1 (experimental group) and MIA 2 (control group). Interview, test, observation, and documentation were the techniques of collecting the data. Analyzing the data was using Independent t-test. Based on the results of Independent t-test with α=0.05, it was obtained the cognitive score of sig. (2 tailed) 0.046 (H0 was rejected). It showed that Project Based Learning model with Google Classroom media facilitated better learning achievement than the model without the use of Google Classroom media.

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