Jurnal Pendidikan Kimia (JPKim)
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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<![CDATA[Tin Dioxide Thin Films As Carbon Monoxide Sensor ]]>
<![CDATA[Yati B Yuliyati]]>;
<![CDATA[Rubianto A Lubis]]>;
<![CDATA[Atiek R Noviyanti]]>;
<![CDATA[Nia Kurniatin]]>
<![CDATA[ Jurnal Pendidikan Kimia (JPKim) Vol 9, No 1 (2017): April ]]>
Publisher : <![CDATA[Pascasarjana Universitas Negeri Medan ]]>
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DOI: 10.24114/jpkim.v9i1.6189
<![CDATA[Abstract: This research aims to create SnO2 thin films that have the size of micrometers to nanometers for detecting CO gas. The method used in this research is a sol-gel method where all precursors such as tin dichloride, distilled water, ethanol, and ammonium fluoride 5%-10% (w/w) are mixed together to form a colloidal system. The colloidal systems with the addition of palladium are precipitated on a glass substrate. The substrate is heated at the temperature of 70oC and 100oC. Then the resistance value is determined using the avometer. The SnO2 thin films are characterized by SEM and XRD. The result of this research is that SnO2 thin films show the best sensitivity in colloidal systems with the addition of ammonium fluoride 10% (w/w). The result of the characterization of SEM and XRD concludes that SnO2 thin films can be obtained by a sol-gel method with a nanometer-scale size and it can respond to the CO gas. Keywords: carbon monoxide, metal oxides, sol-gel method, thin films]]>
<![CDATA[The Development of Problem Based Learning Modules of Acid Base Materials in SMA N 5 Jambi in Developing Student Metacognitive Skills ]]>
<![CDATA[Pauline Dewi Triani]]>;
<![CDATA[Nazarudin Nazarudin]]>;
<![CDATA[M Rusdi]]>
<![CDATA[ Jurnal Pendidikan Kimia (JPKim) Vol 9, No 1 (2017): April ]]>
Publisher : <![CDATA[Pascasarjana Universitas Negeri Medan ]]>
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DOI: 10.24114/jpkim.v9i1.6204
<![CDATA[Abstract: This research was motivated by the successful development of modules that serve as self-learning material for students, but the previous development of article the modules only show tasks in the form of multiple choice questions and essay. While there are so many types of tasks in the form of problems that can be used to improve student learning. This research goal was to understand how to develop module based on problem-based learning which are efficient and beneficial for the students, to analyse the application of problem-based learning modules on acid-base materials, and to understand the impact of problem-based learning modules to improve students' metacognition skills.This research used ADDIE development model consist of analysis, design, development, implementation, and evaluation. The data obtained from each stage of the ADDIE development model in the form of qualitative data were described. These were obtained from expert validators students and teachers. The problem based learning module developed by the researcher has been validated by two expert validators. The results from a small group trial showed that the students were able to follow each stage contained in modules well and was able to increase their metacognition skills using this module.Keywords: modules, problem-based learning, metacognition]]>
<![CDATA[The Effect of Inquiry Learning Method by Using Laboratory and Logical Thinking on Learning Outcome in Chemical Reaction Rate ]]>
<![CDATA[Gulmah Sugiharti]]>;
<![CDATA[Siti Kholilah Hasibuan]]>
<![CDATA[ Jurnal Pendidikan Kimia (JPKim) Vol 9, No 1 (2017): April ]]>
Publisher : <![CDATA[Pascasarjana Universitas Negeri Medan ]]>
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DOI: 10.24114/jpkim.v9i1.6184
<![CDATA[Abstract: This research aims to discover the effect of learning models using laboratory and logical thinking ability to the students of chemistry learning outcomes on the material rate of the reaction. The research was conducted on the students of class XI IPA MAN 2 Model Medan T. A. 2016/2017. The population in this research is all students of class XI IPA MAN 2 Model Medan which consists of 8 classes. The sample is determined by purposive sampling that takes 2 classes that made the experimental class. This type of research is experimental type with factorial design 2 x 2. Data retrieval for student learning outcomes obtained by test of learning result using valid instrument as much as 23 questions and reliable (0,875). Whereas, the data for students logical thinking ability is obtained through questionnaire of logical thinking ability by using valid instrument data. Data analysis techniques used two-way variance analysis. The result of research shows that there is influence of Inquiry learning model by using real laboratory and virtual laboratory on students' chemistry learning result on reaction rate material with Fcount> Ftable that is 28,6367> 3,99, there is influence of high logical thinking ability and low logical thinking ability to the result of student's chemistry learning on the material of reaction rate with Fcount> Ftable is 21,6251> 3,99, and there is interaction between learning model with logical thinking ability to student's chemistry learning on reaction rate material with Fcount> Ftable that is 20,7645 > 3.99. Keywords: learning outcomes, interaction, virtual laboratory, real laboratory, inquiry learning model]]>
<![CDATA[The Role of Organization Collage Student a Study Program to Build Leadership Character Candidate Chemistry Teacher ]]>
<![CDATA[Leony Sanga Lamsari Purba]]>;
<![CDATA[Elisa Natalia Sibarani]]>
<![CDATA[ Jurnal Pendidikan Kimia (JPKim) Vol 9, No 1 (2017): April ]]>
Publisher : <![CDATA[Pascasarjana Universitas Negeri Medan ]]>
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DOI: 10.24114/jpkim.v9i1.6190
<![CDATA[Abstract: The development of social media into today's style of life. The decline in the child's desire to follow communities a result of the use of social media affect the formation of character in children. Character education is a very good effort from all of people who develop education. Science briefing will children with good character is the responsibility of all of people involved in education for the future of dignity. Teachers is an asset in the world of education should have good prospects in education which is not a crisis of character. Organization is a place for prospective teachers to build character. This study aims to describe the role of student organization of study program in developing the leadership character of prospective educators of Chemistry Christian University of Indonesia. The focus in this research is the role of organization of student set of study program in shaping the leadership character of prospective educator. In this research, qualitative approach and case study research design is used to collect data by technique (1) in-depth interview, (2) nonparticipant observation, (3) documentation study. Data analysis techniques use data reduction, data presentation, verification or conclusion. The result of this research is the role of organization of student set of study program in shaping the leadership character of prospective educator by giving courage, integrity, good sense of humor and maturity which is 96.5%, 93,75%, 93,75% and 91, 25% on prospective educators. So, the students are expected to join the organization of student group of study program is effort done in shaping the leadership character of prospective educator of Chemistry Christian University of Indonesia.Keywords: character, chemistry, educators]]>
<![CDATA[Mechanism Study of the Glycerol Oligomerization Reaction using Ab Initio Method ]]>
<![CDATA[Muhammad Yusuf]]>
<![CDATA[ Jurnal Pendidikan Kimia (JPKim) Vol 9, No 1 (2017): April ]]>
Publisher : <![CDATA[Pascasarjana Universitas Negeri Medan ]]>
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DOI: 10.24114/jpkim.v9i1.6185
<![CDATA[Abstract: The mechanism study of the glycerol oligomerization reaction was performed to obtain the most possible diglycerol product based on its optimized energy. The mechanism study of the glycerol oligomerization reaction has been investigated regarding to SN2 type route with using HyperChem computer software, ab initio method, and 6-31G* basis set for all atom. Based on the computational calculation results, the energy level of the interaction between base catalyst (NaOH) with glycerol was similar in the α or β-anionic glycerol position (529.38kJ/mol). These results indicate the interaction of base catalyst (NaOH) with glycerol in the α or β-anionic glycerol position shows same possibility energetically favored. However, based on the computational calculation of diglycerol product, αα’-linear diglycerol more possible formed than αβ-branched diglycerol and ββ’-branched diglycerol due to its lowest energy (-0.19 kJ/mol). These results show that the fast attack of polarized glycerol to a carbon of a second glycerol will easier develop when the product is a αα'-linear diglycerol. The next step is formation of linear triglycerol from αα'-linear diglycerol which the difference of energy with glycerol is 6.83 kJ/mol. Keywords: ab initio, diglycerol, HyperChem, oligomerization]]>
<![CDATA[Purification of Recombinant Human Pretrombin-2 in Escherichia coli for Thrombin Production as Fibrin Glue Components ]]>
<![CDATA[Saronom Silaban]]>;
<![CDATA[Iman Permana Maksum]]>;
<![CDATA[Khomaini Hasan]]>;
<![CDATA[Sutarya Enus]]>;
<![CDATA[Toto Subroto]]>;
<![CDATA[Soetijoso Soemitro]]>
<![CDATA[ Jurnal Pendidikan Kimia (JPKim) Vol 9, No 1 (2017): April ]]>
Publisher : <![CDATA[Pascasarjana Universitas Negeri Medan ]]>
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DOI: 10.24114/jpkim.v9i1.6201
<![CDATA[Abstract: Pretrombin-2 (PT2) is a thrombin precursor that plays a role in converting fibrinogen to fibrin for the process of wound recovery. This material can be applied instead of eye surgery suture technique. The intein-mediated refining system to purify the protein is attractive to be developed, since the protein is obtained by one purification step, capable of self-splicing, the protein can be diffused in to the N-terminal (PT2 cutting of the intein induced marker changes in pH and temperature) and on the C-terminal (cutting PT2 from the intein-induced marker of the thiol reagent). In this study, we purified the PT2 fusion of the expression of E. coli BL21 (DE3) Arctic Express in the intein-mediated chitin matrix column. PT2 was fused with a tag at its N-terminal position, containing the sequence of intein codes SspDnaB followed by chitin binder domain (CBD). Furthermore, the PT 2 fusion was expressed on the E. coli host, then purified in the chitin matrix column. The PT2 cutting process of the intein marker induced changes in the pH and temperature in the column. PT2 fusion was successfully purified in the intein-mediated chitin matrix. The PT2 fusion cut from the induced intein buffer marker at pH 6.5 and incubation at the temperature of 25 oC for 48 hours.Keywords: E. coli, expression, intein mediated purification, pH and temperature changes, PT2]]>
<![CDATA[Secondary Metabolites Phytochemical Analysis of Leaves and Fruit Extract Solanum blumei Nees ex Blume Local ]]>
<![CDATA[Murniaty Simorangkir]]>;
<![CDATA[Ribu Surbakti]]>;
<![CDATA[Tonel Barus]]>;
<![CDATA[Partomuan Simanjuntak]]>
<![CDATA[ Jurnal Pendidikan Kimia (JPKim) Vol 9, No 1 (2017): April ]]>
Publisher : <![CDATA[Pascasarjana Universitas Negeri Medan ]]>
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DOI: 10.24114/jpkim.v9i1.6186
<![CDATA[Abstract: Ranti hitam plant (Solanum blumei Nees ex Blume), Solanaceae family is found in Karo and Dairi, traditionally used as a medicinal plant. The results of phytochemical analysis of extract of S. blumei Nees ex Blume shows that secondary metabolites alkaloids, flavonoids, tannins and saponin are more numerous in the ethanol extract of the leaves than the ethanol extract of the fruit. Quinone is only found in the ethanol extract of the leaves. Phenol is widely available on the ethyl acetate extracts of leaves and fruit.Steroids and triterpenoids are abundant in n-hexane extract and ethyl acetate leaves and fruit as well as the ethanol extract of the leaves. The yield of extract n-hexane, ethyl acetate and ethanol blumei leaves S. Nees ex Blume respectively are 1.76%; 3.17% and 9.95% (w/w). The yield of extract n-hexane, ethyl acetate and ethanol fruit S. blumei Nees ex Blume respectively are 1.21%; 2.50% and 4.09% (w/w). Keywords: phytochemicals, Indonesian, ranti hitam (Solanum blumei Nees ex Blume), medicinal plant]]>
<![CDATA[Organizational Culture Management and Job-Satisfaction As Teacher Job-Performance Predictors ]]>
<![CDATA[Wesly Hutabarat]]>
<![CDATA[ Jurnal Pendidikan Kimia (JPKim) Vol 9, No 1 (2017): April ]]>
Publisher : <![CDATA[Pascasarjana Universitas Negeri Medan ]]>
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DOI: 10.24114/jpkim.v9i1.6202
<![CDATA[Abstract: This study is a causal research which is intended to find out direct and indirect effects of organizational culture and job-satisfaction on job-performance. As many as 143 of 645 public high school teachers were selected from 10 pulic high schools in Medan, Indonesia by stratified random sampling techniques. The classroom teacher samples selected were teachers who have teaching experiences for at least 10 years, and have been certified as professional teachers and received certification fees continuously, except for guidance and counseling teachers. It was found that the direct effect of Organizational Culture on Job Satisfaction is 32.50%, while the direct effect of Job Satisfaction and Organizational Culture on Performance is 16.70% and 35.60% respecively. The indirect effect of Organizational Culture on Performance through Job Satisfaction is 14.50%. So the total effect of Organization Culture on Performance is 33.3%. Based on the findings, it can be concluded that organizational culture, organizational structure and job satisfaction have a positive impact on the teacher job-performance of high school teachers in Medan.Keywords: Job-Performance, Job-Satisfaction, Organizational Culture]]>
<![CDATA[Comparison of Titanium Dioxide Nanocrystal with Hydrothermal Method and P25 Degussa for Photocatalytic Arsenic ]]>
<![CDATA[Diana Rakhmawaty E]]>;
<![CDATA[Astri Aldelina]]>;
<![CDATA[Atiek Rostika N]]>
<![CDATA[ Jurnal Pendidikan Kimia (JPKim) Vol 9, No 1 (2017): April ]]>
Publisher : <![CDATA[Pascasarjana Universitas Negeri Medan ]]>
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DOI: 10.24114/jpkim.v9i1.6187
<![CDATA[Abstract: Arsenic is one of 10 chemicals which is harmful to human health, according to WHO. Arsenic that harmful to human health is generally in the form of inorganic compounds with oxidation number of 3 (As(III)). One of the best known method to remediate As(III) is an oxidation method. Titanium dioxide (TiO2) can be used as a photocatalyst to oxidize As(III). The photocatalytic activity of TiO2 is highly dependent on the size and composition of the crystal phase. Smaller size of TiO2 crystal can be obtained by using hydrothermal method. This study aimed to compare the synthesized TiO2 with P25 Degussa to As(III) reduction. Materials used are TiCl4 as a precursor and H2SO4 and t-butanol as solvents. The crystal structure of synthesized TiO2 is a mixture of anatase and rutile with a greater composition of anatase than rutile. The TiO2 crystal size is calculated using scherrer equation and showed that the crystal size is less than 60 nm. The ability of synthesized TiO2 using H2SO4 2.0 M in the reduction of As(III) concentration is 72% exceeded the capability of P25 Degussa is 35%. Keywords: As(III), hydrothermal, H2SO4, t-butanol, TiO2 photoactivity]]>
<![CDATA[Preparation Adsorbent Chitosan of Shell Horseshoe Crab (Tachypleus gigas) and Gelatine to Reduce Pb Content ]]>
<![CDATA[Pada Mulia Raja]]>;
<![CDATA[Nurfajriani Nurfajriani]]>
<![CDATA[ Jurnal Pendidikan Kimia (JPKim) Vol 9, No 1 (2017): April ]]>
Publisher : <![CDATA[Pascasarjana Universitas Negeri Medan ]]>
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DOI: 10.24114/jpkim.v9i1.6203
<![CDATA[Abstract: The Porpuse of this research are to determine the preparation of chitosan from crab shell (Tachypleus gigas) and gelatine adsorbent to reduce of Pb. This research consists of several stages: Preparation of chitosan adsorbent and crab shell (Tachypleusgigas) and gelatine and characterization of Pb after adsorbent applied. Treatment of chitosan solution and gelatin solution with a ratio K25: G75, K50: G50 and K75: G25, then the second treatment 2% chitosan solution add gelatin powder with a variation of 0.1 g, 0.2 g, 0.3 g, 0, 4 g and 0.5 g. the results obtained by reduction of Pb optimum levels found in adsorbent of chitosan and gelatin mixture of 75%: 25% is 83.696% and 2% chitosan adsorbent mixture with the addition of 0.5 g gelatin powder that is equal to 69.316%.Keywords: adsorben, chitosan, gelatin, Pb]]>
