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Jurnal Zarah
Published by Universitas Maritim Raja Ali Haji
ISSN : 23547162     EISSN : 25492217     DOI : -
Core Subject : Science, Education,
Chemistry Education
Jurnal Zarah menerbitkan artikel hasil penelitian, pengembangan, dan kajian literatur tentang berbagai topik dalam bidang Pendidikan Kimia dan Ilmu Kimia.
Arjuna Subject : -
Articles 8 Documents
 1 
Search results for , issue "Vol. 1 No. 1` (2013): April, 2013" : 8 Documents clear
Perbedaan Hasil Belajar Kimia Dengan Menggunakan Model Pembelajaran Kooperatif Tipe Team Quiz Dan Model Pembelajaran Kooperatif Tipe Teams Games Tournament (Tgt) Pada Pokok Bahasan Koloid Siswa Kelas X Teknik Otomotif Smk Negeri 6 Samarinda Nurfitri, Irma; Lestari, Sri; Amir M., Prof. Dr. Muh
Jurnal Zarah Vol. 1 No. 1` (2013): April, 2013
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/zarah.v1i1`.10

Abstract

Telah dilakukan penelitian tentang perbedaan hasil belajar kimia dengan menggunakan model pembelajaran kooperatif tipe Team Quiz dan model pembelajaran kooperatif tipe Teams Games Tournament (TGT) pada pokok bahasan koloid siswa kelas X Teknik Otomoif SMK Negeri 6 Samarinda. Penelitian ini bertujuan untuk mengetahui perbedaan hasil belajar kimia dengan menggunakan model pembelajaran kooperatif tipe Team Quiz dan model pembelajaran kooperatif tipe Teams Games Tournament (TGT) pada pokok bahasan koloid siswa kelas X Teknik Otomoif SMK Negeri 6 Samarinda. Populasi pada penelitian ini adalah seluruh siswa kelas X Teknik Otomotif SMK Negeri 6 Samarinda. Sampel penelitian adalah siswa kelas X Teknik Otomotif 2 dan X Teknik Otomotif 3. Kelas X Teknik Otomotif 2 merupakan kelas yang menggunakan model pembelajaran kooperatif tipe Team Quiz dan kelas X Teknik Otomotif 3 merupakan kelas yang menggunakan model pembelajaran kooperatif Teams Games Tournament (TGT). Pengumpulan data dilakukan dengan dua teknik yaitu teknik tes dan teknik non tes, adapun teknik non tes terdiri atas teknik dokumentasi dan observasi. Data penelitian dianalisis secara statistik uji t, dimana diperoleh thitung = -2,20 dan ttabel = -1,68 . Karena thitung ? -ttabel, pada taraf signifikan 5%, maka Ha diterima, yang berarti terdapat perbedaan hasil belajar siswa antara penggunaan model pembelajaran kooperatif tipe Team Quiz dan Teams Games Tournament (TGT).
Impact Of Emotional Intelligence And Parenting Style (Democratic) On The Performance Of Bilingual Chemistry Learning Khoirunnisa, Fitriah; Nordin, Prof. Madya Aziz Bin
Jurnal Zarah Vol. 1 No. 1` (2013): April, 2013
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/zarah.v1i1`.11

Abstract

The purpose of this study was to examine the relationship between students’ emotional intelligence and students’ democratic parenting style on the bilingual learning achievement of chemistry. This study was conducted on 159 students in the second class of International Pioneering School (RSBI), namely Senior High School 1 and 10, Samarinda, East Kalimantan, selected randomly. Questionnaires given to the students were related to students’ demographics, emotional intelligence and pattern of parental upbringing of students. The data were analyzed by using the Statistics Package for the Social Sciences (SPSS Version 17.0) to get the value of the Pearson’s Correlation. The analysis showed that there was a positive relationship between the students’ democratic parenting style with the students’ emotional intelligence in learning of bilingual chemistry subject (r = 0.289); there was a positive relationship between the learning achievement of bilingual chemistry with democratic parenting style (r = 0.106); there was positive relationship between students’ emotional intelligence with the learning achievement of bilingual chemistry (r = 0.112). Therefore, this study is expected to be the basis for teachers to develop effective learning process by building on students' emotional intelligence elements. In addition, parents can also apply a democratic parenting style to students at home. So that the merger of these two elements can enhance the results of students’ bilingual in chemistry subject.
Peningkatan Hasil Belajar Kimia Melalui Metode Pembelajaran Aktif Tipe The Learning Cell Pada Pokok Bahasan Koloid (Penelitian Tindakan Kelas Pada Siswa Kelas XI IPA SMAN 16 Samarinda) Widarti, Anis
Jurnal Zarah Vol. 1 No. 1` (2013): April, 2013
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/zarah.v1i1`.12

Abstract

Penggunaan Metode Pembelajaran Aktif Tipe The Learning Cell untuk Meningkatkan Hasil Belajar Siswa Pada Pokok Bahasan Koloid (Penelitian Tindakan Kelas pada Siswa Kelas XI IPA SMAN 16 Samarinda). Penelitian ini bertujuan untuk meningkatkan hasil belajar Kimia melalui Metode Pembelajaran Aktif Tipe The Learning Cell pada Pokok bahasan Koloid Kelas XI IPA di SMAN 16 Samarinda. Jenis penelitian ini bersifat deskriptif yang berarti memaparkan data yang diperoleh melalui lembar observasi setiap pertemuan dan Post Test di setiap akhir siklus. Setiap siklus terdapat 4 tahap yaitu, perencanaan, pelaksanaan tindakan, observasi dan refleksi. Data aktivitas siswa dan guru diperoleh dengan metode observasi. Hasil belajar siswa diperoleh dari nilai siswa pada saat menjelaskan kembali materi yang disampaikan oleh guru dan nilai Post Test di setiap siklusnya. Hasil penelitian menunjukkan bahwa hasil belajar kimia siswa melalui metode pembelajaran aktif tipe The Learning Cell dapat meningkat. Peningkatan hasil belajar siswa dilihat berdasarkan jumlah siswa yang tuntas setiap siklusnya. Standar ketuntasan yang digunakan adalah 70 % dengan nilai KKM 70. Siklus pertama, jumlah siswa tuntas adalah 20 siswa atau 48,78%, dengan nilai rata-rata 66,39 ; sedangkan siklus kedua jumlah siswa yang tuntas adalah 34 siswa atau 87,80% dengan nilai rata-rata 75, 51 dan pada siklus ketiga jumlah siswa yang tuntas adalah 40 atau 97, 56% dengan nilai rata-rata 78, 48.
Development Of Ionic Liquid As Catalyst For Transesterification Reaction Alimuddin, Jamila Binti; Yarmo, Prof.Dr. Mohd Ambar
Jurnal Zarah Vol. 1 No. 1` (2013): April, 2013
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/zarah.v1i1`.13

Abstract

Ionic liquid had a various uses and among them is as catalyst in a reaction. This research was carried out to synthesis and developed the choline chloride based ionic liquid to investigate their ability as a catalyst in transesterification reaction. The ionic liquid synthesized was choline chloride.2ZnCl2 and choline.2urea based system. Both of the ionic liquid synthesize were characterized by using Infra-red spectroscopy (FTIR) and Nuclear Magnetic Resonance spectroscopy (1H NMR & 13C NMR). Characterization result confirmed the functional group and the structure of the ionic liquids was as expected. Both ionic liquid were applied as a catalyst for the transesterification reaction and the resulting product was analyzed by GC-FID and GCxGC-MS (ToF). The transesterification reaction of palm olein and buthanol with the presence of choline chloride.2ZnCl2 gives 25.7% yields while with the use of choline chloride.2urea gives 25.0% yields. The results show that the acidity of choline chloride.2ZnCl2 and the basic properties of the choline chloride.2urea were not really suitable to be used as catalyst in the transesterification reaction.
Production Of Biolubricant Based On Jatropha Curcas Oil And Linear Alcohol Abstract Adriani, Nina; Salimon, Prof.Dr. Jumat
Jurnal Zarah Vol. 1 No. 1` (2013): April, 2013
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/zarah.v1i1`.15

Abstract

The use of oils and fats for lubrication purposes has been practiced for many years. This is starting that realized since the mineral oil in a limited number. In this research, the production of biolubricant based plant oil is Jatropha Curcas oil and linear alcohol. Oil produced from the fruits is 44.30%. However, oxidative stability and low pour point are problem for biolubricant. The method used to overcome this problem is epoxidation process and ring opening. Epoxidation process successfully carried out by testing the oxyrane value and also FTIR analysis, where the peak of alkenes is 3007 cm-1. Epoxy peak appeared at 843 and 824 cm-1, which is testament to the success of epoxy ring is formed. Ring opening proved successful with FTIR analysis of the appearance of hydroxyl groups at the peak of 3444 cm-1, the peak of ether in 1097 cm-1, and the loss of epoxy peak. Bioubricant which is produced in the form of alcohol ether is to produce five types of biolubricant, which are decanol ether, dodecanol ether, tetradecanol ether, hexadecanol ether and octadecanol ether. 1H dan 13C NMR analysis is also succeeded in proving the presence of key functional groups for the fifth type of biolubricants. In terms of viscosity and flash point, lubricant successful enhanced oil-based plants, but not succeded to reduce the pour point.
Preparation Of Natural Rubber/High Density Polyethylene Composite Reinforced Rice Husk Treated With Liquid Epoxidized Natural Rubber (LENR) Syafri, Rahmadini; Abdullah, Prof Dr. Ibrahim; Ahmad, Prof Madya Dr. Ishak
Jurnal Zarah Vol. 1 No. 1` (2013): April, 2013
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/zarah.v1i1`.16

Abstract

Thermoplastic natural rubber (TPNR) composites with rice husk (RH) as filler were prepared via melt blending using an internal mixer Brabender Plasticorder. TPNR matrix was prepared from natural rubber (NR) and high density polyethylene (HDPE) with a composition ratio of 60:40. The optimum processing parameters for NR/HDPE matrix was obtained at 135 oC, at mixing rate of 50 rpm and blending time of 12 minutes, while the parameters for the NR/HDPE/RH composite was at 135 oC mixing rate of 45 rpm and blending time of 12 minute. Addition of rice husk into the NR/HDPE matrix was aimed to reinforce the composites with the filler. The high silica content of rice husk has made rice husk to be used as potential reinforcement filler for composites. However, the application of rice husk as filler is limited due to the hydrophilic nature of rice husk surface causing incompatibility and weak interfacial adhesion between rice husk and the hydrophobic polymer matrix. Hence, the cellulose surface of rice husk has to be modified. The rice husk was treated with sodium hydroxide (NaOH) as pre-treatment and later coated with liquid epoxidized natural rubber (LENR). Several concentrations of NaOH solution were used for alkali treatment of untreated rice husk (RHi) and the most effective was at 5% NaOH in aqueous solution (RHiNa). LENR coating was also carried out at several concentrations from 5% to 20% LENR in toluene. Characterizations of rice husk surfaces were analyzed by FTIR, optical microscope and SEM micrograph. The mechanical properties of rice husk filled composites observed, showed that the maximum value obtained were for composites reinforced with alkali treated and coated with 10% of LENR (RHiNaLE 2). The tensile and impact strength obtained were 6.9 MPa and 24.6 kJ/m2 respectively. Effects of RHiNaLE 2 loading on tensile and impact strengths of composites showed that the properties decreased at higher loadings due to agglomeration of filler particles. However the tensile modulus and hardness were found to increase with filler loading. The dynamic mechanical thermal analysis also showed that composites prepared exhibited a shift in the tan delta peak (Tg) to a higher temperature due to the increased RHiNaLE 2-Matrix interaction. In conclusion, modification of rice husk surface via NaOH treatment and coating with LENR was successful in reducing the hydrophilic nature of rice husk powder. The RHi-Matrix interfacial adhesion had improved which lead to higher mechanical properties of the composites prepared.
Synthesis Of Antibacterial Cream Based On Allium Sativum As Topical Delivery Henika, Fany; Khalid, Dr Rozida
Jurnal Zarah Vol. 1 No. 1` (2013): April, 2013
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/zarah.v1i1`.17

Abstract

This study was conducted to produce a topical delivery system which has an active ingredient which can be used for treatment of skin diseases such as acne and common skin disease. In this study, four cream formulation were prepared. Three of four cream formulations contained Allium sativum extract 0.35%, 0.5% and 0.65%. Infrared spectroscopic analysis was performed on four samples of different extracts of Allium sativum. In addition, Allium sativum extract and four samples of different creams have alsodone testing for antibacterial activity. In this study, Sthaphylococcus aureus and Escherichia coli were used as microorganism. The Results showed that samples of fresh methanol extract Allium sativum provide better antibacterial activity compared to the three other samples. Four samples of cream with different percentage of active ingredients showed have no antibacterial effect after antibacterial activity testing been done. However, in terms of quality, the samples of the cream produced a good quality, based on the value of pH, viscosity and stability for 3 weeks of storage
Pembuatan Lapisan Tipis TiO2 -DOPED Logam M (M= Ni, Cu dan Zn) Dan Apliksi Sifat Katalitiknya Pada Penjernihan Air Rawa Gambut Willian, Nancy; Arif, Prof. Syukri
Jurnal Zarah Vol. 1 No. 1` (2013): April, 2013
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/zarah.v1i1`.18

Abstract

Preparationof of TiO2-doped Metal M ( Ni, Zn and Cu) has been prepared using glass as substrate with dip-coating technique. Titanium isopropoksida (TIP, Ni(Oac)2 4 H2O, Zn (Oac)2 2 H2O dan Cu (Oac)2 were used as starting material with addition of dietanol amin (DEA) as additive in isopropanol solution. Film were prepared with various consentration of metal as 1, 3 and 5 mol % with consentration of TIP in 0,5 M. Coating were prepared by immersion of glass substrate into solution and withdraw speed of 20 cm/min. Coated glass were dried at 100 – 110o C and heated at 500o C the process were repeated for several time. The product were characterization by XRD and show that the appeared layer has structure of anatase. EDX analisis show that thin film have content of Ti, Ni and Cu. Crystallized zise were calculated with scherrer formula shown that various crystallize size are 12-21 nm. According to transformation effectivity of titania doped M in peat swam water shown that catalytic activity 34,40 – 53,71 for the irradiation during 24 hours.

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