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Jurnal Pendidikan Kimia (JPKim)

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Published by Universitas Negeri Medan

ISSN : 20853653 EISSN : 25493116 DOI : 10.24114

Core Subject : Science, Education, Social,

Biochemistry, Genetics & Molecular Biology Chemistry Education Environmental Science

Jurnal Pendidikan Kimia (JPKim) yang dikelola Program Pascasarjana Universitas Negeri Medan terbit 3 kali setahun, yakni bulan April, Agustus dan Desember. JPKim menerbitkan artikel ilmiah hasil-hasil penelitian pendidikan kimia dan kimia fundamental. JPKim juga menerbitkan artikel Review terkait Pendidikan Kimia dan Kimia.

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Articles 10 Documents

Search results for , issue "Vol 6, No 2 (2014): Agustus" : 10 Documents clear

PEMBUATAN MINYAK KELAPA MURNI (Virgin Coconut Oil, VCO) MELALUI KOMBINASI TEKNIK FERMENTASI DAN ENZIMATIS MENGGUNAKAN GETAH PEPAYA Ramlan Silaban; Vivi Hutapea; Riza Manullang; Irving Josafat Alexander
Jurnal Pendidikan Kimia (JPKim) Vol 6, No 2 (2014): Agustus
Publisher : Pascasarjana Universitas Negeri Medan

Abstract. This study aims to determine the yield of Virgin Coconut Oil (VCO) is made through a combination of fermentation and enzymatic techniques using papaya latex. Previous papaya sap is processed into crude papain enzyme and fermentation using yeast tempeh (Rhizopus oligosporus). Concentration of 100 ml coconut milk is added 0.5 grams of tempeh and coarse with variation of the enzyme papain 0.0 grams; 0.2 grams; 0.4 grams; 0.6 grams; 0.8 grams and with a pH of 3.4 and 5 variations of this mixture was incubated for 24 hours at room temperature. Of 100 mL of milk obtained optimum yield Virgin Coconut Oil (VCO) of 27.8 mL of the enzyme at a concentration of as much as 0.6 grams of crude papain at pH 5. addition of the enzyme papain is able to increase the yield of coarse Virgin Coconut Oil (VCO), but at a certain concentration will be able to lower the yield. The lower the pH, the lower the yield of Virgin Coconut Oil (VCO) is obtained. Analysis of the quality of Virgin Coconut Oil (VCO) in terms of free fatty acid 0.1720%, 0.18% and a water content of 9.45 mg iodine / g. The Virgin Coconut Oil (VCO) obtained had been met requirement set by SNI standard’s. Kata kunci: Virgin Coconut Oil (VCO), Getah Pepaya, Ragi Tempe

EFEKTIVITAS METODE EKSPOSITORI DENGAN COOPERATIVE INTEGRATED READING AND COMPOSITION TERHADAP HASIL BELAJAR MAHASISWA SEMESTER SATU FKIP UHN TAHUN AJARAN 2013/2014 PADA POKOK BAHASAN STOIKIOMETRI Erna Helena M Tampubolon
Jurnal Pendidikan Kimia (JPKim) Vol 6, No 2 (2014): Agustus
Publisher : Pascasarjana Universitas Negeri Medan

Abstract This study aims to determine which method is more effective is used for the Ekspositori method with the method of Cooperative Integrated Reading and Composition on that matter of stoichiometry in prodi mathematics pedagogy UHN. The hypothesis of this research is the existence of significant differences between the learning outcomes of students who use the Ekspositori method with the method of Cooperative Integrated Reading and Compositon on stoichiometric materials in mathematics pedadogy UHN prodi. The Data were processed using the test of normality test with Liliefors. It turns out that the results obtained from the normal Gaussian with Ekspositori Group = 5% and dk = 7 then Lhit = 0,1097 = 0,300 Ltab < as well as data that uses the methods of Cooperative Integrated Reading and Composition are also Gaussian normal with = 5% and dk = 9 then Lhit = 0,1337 = 0,273 Ltab <. To find out if the data comes from the population that bervarians same or different, then used its homogeneity test, apparently retrieved Fhit (1,417) < F ¬ tab (1,668) and thus, the population was homogeneous. to find out whether there are differences in the learning results using the method Ekspositori and the method of Cooperative Integrated Reading and Composition used t test, if k = 88 apparently retrieved thit (3,051) > ttab (1,991). Data analysis results obtained from equivalent and Byway of baku Experimental group of learning outcomes = 11,91 and raw = 2,932 Byway, in the control group = raw Byway and 10.20 = 2,455.Key words: The method Ekspositori, method of Cooperative Integrated Reading and Composition, Learning Achievement, Stoichiometry

PENGARUH MODEL PEMBELAJARAN KOOPERATIF TIPE THINK PAIR SHARE (TPS ) DIKOMBINASIKAN DENGAN METODE EKPERIMEN TERHADAP KEMAMPUAN BERPIKIR KRITIS DAN HASIL BELAJAR KIMIA MAHASISWA DI PAPUA Tiurlina Siregar; Christiana Niken Larasati
Jurnal Pendidikan Kimia (JPKim) Vol 6, No 2 (2014): Agustus
Publisher : Pascasarjana Universitas Negeri Medan

Abstract. Learning activities and critical thinking skills students of Biology at the University Ottow Geissler organic chemistry courses remains low. Lack of critical thinking skills is demonstrated by the low student learning outcomes of students. To enhance critical thinking skills and learn to apply the learning outcome types Cooperative Think Pair Share ( TPS ). The population was students of Biology, University of Papua years teaching Ottow Geissler 2012/2013 consists of 10 students. This study aims to determine the relationship of cooperative learning model Think Pair Share ( TPS ) through the experimental method to the results of students of the University Ottow berajar Geissler ( Sub Topic Hydrocarbon Compounds ). Relationship learning model is designed based on the results of preliminary studies, further validated by experts then tested the students of Biology, University of Ottow Geissler using purposive sampling. Is a quantitative research instrument. Quality of the instrument based on the validity and reliability of the instrument in the form of questionnaires and tests. The conclusion from this study is that there is a fairly strong relationship cooperative learning model Think Pair Share ( TPS ) Method Through Experiment Against the critical thinking skills of 0.5730 and has dealt cooperative learning model Think Pair Share ( TPS ) with the learning outcome of -0.719. Keywords: Cooperative Learning Model, Type Think Pair Share (TPS) Critical Thinking, Learning Outcomes, Hydrocarbons

THE INFLUENCE OF GUIDED INQUIRY LEARNING METHOD WITH MACROMEDIA FLASH TOWARD STUDENT’S ACHIEVEMENT IN THE SOLUBILITY AND SOLUBILITY PRODUCT TOPIC Yeni Purwati; Retno Dwisuyanti
Jurnal Pendidikan Kimia (JPKim) Vol 6, No 2 (2014): Agustus
Publisher : Pascasarjana Universitas Negeri Medan

Abstrak. Penelitian ini bertujuan untuk mengetahui hasil belajar siswa dalam topik kelarutan dan hasil kali kelarutan dengan menggunakan metode pembelajaran inkuiri terbimbing dengan Macromedia Flash media. Populasi penelitian ini adalah seluruh siswa kelas dua di RSBI SMA Negeri 2 Kisaran. Sampel adalah dua kelas yang dipilih dengan metode random sampling. Kelas eksperimen diajarkan dengan metode pembelajaran inkuiri terbimbing dengan Macromedia Flash media dan kelas kontrol diajarkan dengan metode konvensional. Instrumen penelitian adalah tes hasil belajar yang distandarisasi oleh validator ahli dan validitas empiris. Data dianalisis dengan Microsoft Excel untuk Windows 2003. Hasil tes distandarisasi dan diperoleh 20 butir soal yang valid dengan reliabilitas 0,937. Pengaruh metode pembelajaran inkuiri terbimbing dengan Macromedia Flash media untuk meningkatkan hasil belajar siswa diperoleh dari kemampuan siswa untuk menjawab pertanyaan-pertanyaan sebelum perlakuan mengajar (pre test) dan setelah perlakuan mengajar (post test) dan data yang digunakan untuk mengetahui gain ternormalisasi. Hasil penelitian menunjukkan bahwa data distribusi normal dan sampel homogen. Kelas eksperimen yang diajarkan dengan metode pembelajaran inkuiri terbimbing dengan Macromedia Flash media dapat meningkatkan hasil belajar siswa dalam kategori tinggi (0.78 ± 0,0940) dan kelas kontrol yang diajarkan dengan metode konvensional dapat meningkatkan hasil belajar siswa dalam kategori sedang (0.59 ± 0,1124). Analisis statistik menunjukkan thitung (7.6454) > ttabel (1.6593). Jadi, dapat disimpulkan bahwa hasil belajar siswa yang diajarkan dengan metode pembelajaran inkuiri terbimbing dengan Macromedia Flash media lebih tinggi dibandingkan dengan metode konvensional. Selain itu, aspek kognitif yang dikembangkan dengan penerapan metode pembelajaran inkuiri terbimbing dengan Macromedia Flash media adalah C2, C3 dan C4. Tingkat aspek kognitif adalah C2 (Pemahaman), C3 (Aplikasi) dan C4 (Analisis). Rata-rata gain yang ternormalisasi adalah C2 (0.92, kategori tinggi), C3 (0,84, kategori tinggi), dan C4 (0.74, kategori tinggi). Kata kunci: Metode inkuiri terbimbing, Macromedia Flash, Kelarutan dan hasil kali kelarutan dan hasil belajar siswa

VALIDASI METODE PENENTUAN SAKARIN MENGGUNAKAN KROMATOGRAFI CAIR KINERJA TINGGI Agus Kembaren; Tiasina Harahap
Jurnal Pendidikan Kimia (JPKim) Vol 6, No 2 (2014): Agustus
Publisher : Pascasarjana Universitas Negeri Medan

Abstract. This research was aimed to validation analytical method of Saccarine and to determine saccarine consentration in soft drink High Performance Liquid Chromatography. Sodium Saccarine salts are used as standard. Sodium Saccarine salts dissolve in mobile phase methanol : fosfat buffer (60:40). Concentration of standard saccarine solution made in 20, 40, 60, 80, and 100 ppm. HPLC Agilent Technology 1260 Infinitely Series, Poroshell/C18 column- 50 mm lenght- id 4.6 mm - particles size 2.7 µm, UV-detector in λ 265 nm, injection volume 20 µL , and flow rate 1 mL/minutes were used in this research. Method validation parameters were determined by linierity, precision, accuracy, LOD, LOQ, and selectivity. The results show that lineariy with R = 0.998702, precision with RSD = 0.192%, accuracy with % recovery = 100.26%, LOD = 0.172 ppm, LOQ = 0.573, and selectivity with Rs = 0.2. Testing for the ‘Sprite Zero’ soft drink show that 117.6 mg/kg saccarine (under the maximum content in carbonated/noncarbonated soft drink). Conclution from this research is, HPLC method can use in analysis saccarine content in soft drink Kata kunci: metode penentuan, sakarin, kromatografi kinerja tinggi

KAPASITAS SERAPAN DAN ENERGI IKAT PADA BIOSORSPSI ION MANGAN(II) OLEH BIOMASSA Saccharomyces cerevisiae TERIMOBILISASI PADA CAMPURAN SILIKA GEL DAN ZEOLIT Jasmidi Jasmidi; Rahmat Nauli
Jurnal Pendidikan Kimia (JPKim) Vol 6, No 2 (2014): Agustus
Publisher : Pascasarjana Universitas Negeri Medan

Abstract. This research aims to study the uptake capacity and binding energy in ion biosorption of manganese(II) by biomass S. cerevisiae immobilized on silica gel and zeolite mixture. As for the method is performed by varying the initial concentration of manganese(II) in solution were contacted with biomass S. cerevisiae immobilized on silica gel and zeolite. To determine the concentration of manganese(II) in the solution used visible spectrophotometric method, using complexing formaldoksim. amount of manganese ions(II) adsorbed by the immobilized biomass was determined by calculating the difference between the concentration of manganese(II) contained in the solution before and after contacted. The results showed that the absorption of manganese(II) increased linearly as a function of concentration up to 50 mg/L, sorption capacity calculations obtained using Langmuir isotherm equation was 10.989 mg/g or 2,0 x 10-4 mol/g dry weight biomass S. cerevisiae immobilized. Binding energy value between biomass S. cerevisiae immobilized with manganese ions (II) is 30.69 kJ/mol. Thus the interaction is a chemical interaction Key words : Absorption capacity, binding energy, S. cerevisiae, immobilization.

PENERAPAN MODEL PEMBELAJARAN KOOPERATIF TIPE STUDENT FACILITATOR AND EXPLAINING (SFAE) UNTUK MENINGKATKAN PRESTASI BELAJAR SISWA PADA POKOK BAHASAN KIMIA KOLOID DI KELAS XI IPA SMA SANTA MARIA PEKANBARU Heru Christianto; Johni Azmi; Susilawati Susilawati
Jurnal Pendidikan Kimia (JPKim) Vol 6, No 2 (2014): Agustus
Publisher : Pascasarjana Universitas Negeri Medan

Abstract. The Research is about using cooperative learning model of Student Facilitator and Explaining (SFAE) type which has been done to know improvement student’s achievement on the topic of colloid at XIIPA classes of SMA Saint Marie Pekanbaru in the second semester of academic year 2012/2013. This research is experimental research based on pretest-posttest design. The sample consisted of two classes, XI IPA2 class as experiment group and XI IPA3 class as control group that randomly selected after testing homogeneity. Cooperative learning model of Student Facilitator and Explaining (SFAE) type is applied in XI IPA2. Analysis of data used t-test. Results of data processing obtained tcount > ttable (2,28 > 1,67). It means that using cooperative learning model of Student Facilitator and Explaining (SFAE) type can improve student’s achievement on the topic of colloid at XI IPA classes of SMA Saint Marie Pekanbaru. The improvement of student’s achievement in experiment class was supported by N-Gain score as many as 0,78 that included in high category. Keyword : Cooperative Learning of Student Facilitator and Explaining, Student’s Achievement, Colloid

PENGARUH LATIHAN FISIK (SENAM JANTUNG SEHAT) TERHADAP KADAR TNF- α DAN KADAR GULA DARAH PADA PENDERITA OBESITAS Yulia Fitri; Nunung Sri Mulyani; Ramlan Silaban; Zulfahri Zulfahri
Jurnal Pendidikan Kimia (JPKim) Vol 6, No 2 (2014): Agustus
Publisher : Pascasarjana Universitas Negeri Medan

Abstract Obesity is one of unresolved health problem in Indonesia. Based on the data of Indonesian health profile in 2011, the prevalence of nutritional status of adult population (>18years) in Aceh of overweight was 10,9% and obesity 13,14%. Obesity is a risk factor for development of varous deseases such as diabetes mellitus, hypertension ad heart disease, this occurs because of the role molecules that exist in adipose tissue Tumor necrosis factor alpha (TNF-α) is cytokine that tended to increase in patients with obesity and blood sugar levels. Physical exercise (gymnastic healty heart) is one of activity that can effect of TNF-α levels and blood sugar level in people with obesity. This study is aimed at understanding the impact of physical exercise (gymnastic healty heart) on lowering TNF-α levels and fasting blood sugar of obesity.The research design is quasy experimental with observational pre-post test design. The obese people aged 18-21 years was 25 samples. The sample are given physical exercise (gymnastic healty heart) for 4 weeks.. The data is analyzed by using univariate and bivariate and tested by using T-test dependent and correlation person. Based on the result of this study, it was found that physical exercise did not significant on TNF-α (p=0,11), but physical exercise is significant on fasting blood sugar level (p=0,03). There was no correlation between TNF-α level and fasting blood sugar level before and after Physical exercise is done ( p=0,059 and p=0,192).Keywords : Physical exercise, TNF-α level, fasting blood sugar level and obesity

PENERAPAN MODEL PEMBELAJARAN KOOPERATIF TIPE TGT (TEAMS GAMES TOURNAMENT) DENGAN MEDIA MICROSOFT POWERPOINT UNTUK MENINGKATKAN HASIL BELAJAR SISWA PADA POKOK BAHASAN HIDROLISIS GARAM Lisnawaty Simatupang; Wesly Hutabarat; Jiwa Dash
Jurnal Pendidikan Kimia (JPKim) Vol 6, No 2 (2014): Agustus
Publisher : Pascasarjana Universitas Negeri Medan

Abstract. Research application of cooperative learning TGT (Teams Games Tournament) with microsoft office powerpoint to improve student learning outcomes on the subject of salt hydrolysis has been carried out. The population in this study were all XI –IPA students of SMA N 2 Model Binjai, amounting to 8 classes and each class consists of 40 students. The samples in this study were 2 classes are taken at purposive sampling. The instrument used in this study were achievement test in the form of multiple choice questions with the amount of as much as 30 questions that have been declared valid and reliable instrument observation and student learning activities. The hypothesis was tested with a significance level of 0.05 obtained thitung ≥ ttable, is thitung = 11,348 > 1.6671, so Ho is rejected and Ha accepted. Based on data analysis and hypothesis testing conducted found that: (1) Student learning outcomes are taught with cooperative learning model TGT using microsoft office powerpoint media namely (81.925 + 39.425), and direct instruction model of learning to use the media microsoft office powerpoint (71.475 + 38,370), (2) students' learning activities using cooperative learning model TGT (Teams Games Tournament) with microsoft office powerpoint media that is higher than 81.080 direct instruction model of learning with microsoft office powerpoint media namely 55,630 (3) TGT cooperative learning model using microsoft office powerpoint media can improve student learning outcomes, (4) the percentage increase student learning outcomes using cooperative learning model TGT with microsoft office powerpoint media that is higher by 73.00% compared to direct instruction model of learning with microsoft office powerpoint media which is equal to 53.00%, (5) cognitive domains that terkembangkan after learned with TGT cooperative learning model using microsoft office powerpoint media is knowledge (C1) which is equal to 91.00% and the direct instruction model of learning using microsoft office powerpoint media is knowledge (C1) which is equal to 72.7% Kata kunci: kooperatif tipe TGT, microsoft office powerpoint, direct instruction

PENGEMBANGAN MODEL PROBLEM BASED LEARNING (PBL) TERINTEGRASI INKUIRI TERBIMBING PADA PELAJARAN KIMIA LARUTAN DI SMA KELAS XI UNTUK MENINGKATKAN HASIL BELAJAR KIMIA DAN NILAI KARAKTER Dkmtj SISWA Eka Kartika Silalahi; Ramlan Silaban; Albinus Silalahi
Jurnal Pendidikan Kimia (JPKim) Vol 6, No 2 (2014): Agustus
Publisher : Pascasarjana Universitas Negeri Medan

Abstract This study aims to analyzed (1) The difference of chemical enhancement of learning outcomes of students who were taught significantly between Instrusction Direct (DI) model, Problem Based Learning (PBL) and guided inquiry, and Problem Based Learning (PBL) and guided inquiry with computers, (2) Differences of character Dkmtj students enhancement as significantly were taught using Instrusction Direct (DI) learning model, Problem Based Learning (PBL) and guided inquiry and Problem Based Learning (PBL) and guided inquiry with computers, and (3) the relationship between the character and chemical students outcomes with the learnin towards learning model is applied. This studied was experimental. The population was all students high school of XI class in Pematangsiantar town as 2013/2014 Academic Year. Sampling technique used cluster random sampling, that was SMAN 2, SMAN 3 and SMAN 4 Pematangsiantar respectively 3 classes. The research instrument was studying chemistry test results and observations increased in the value of the character of students. The data analysis technique used the analysis of variance (ANOVA) 1 way (One way ANOVA) with SPSS 20 for windows at significance level α = 0.05. Based on the results of data processing, it was concluded (1) Significantly there were differences in learning outcomes between students who were taught chemistry learning model of Direct Instruction (DI) compared with the model of Problem Based Learning (PBL) as compared with the integrated guided inquiry model of Problem Based Learning (PBL) is integrated guided inquiry using computer. (2) Significantly there were differences of character values of discipline, critical thinking, independent, responsible and honest that was developed between the students who were taught by the learning model of Direct Instruction (DI) compared with the model of Problem Based Learning (PBL) integrated guided inquiry model than the Problem based Learning (PBL) integrated guided inquiry using the computer. (3) Significantly there is a relationship with the learning outcomes of the character values of discipline, critical thinking, independence, accountability and integrity are spreading among the students who are taught by the model of Problem Based Learning (PBL) and the integrated guided inquiry model of Problem Based Learning PBL integrated guided inquiry using a computer. Keywords: Problem Based Learning (PBL), Guided Inquiry and Direct Instrusction (DI)

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