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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 7, No 2 (2015): Agustus" : 10 Documents clear

Efek Paparan Rhodamin B Terhadap Perubahan Makroskopis Dan Histopatologi Mukosa Kolon Mencit Jantan (Mus musculus L.) Novita Aryani
Jurnal Pendidikan Kimia (JPKim) Vol 7, No 2 (2015): Agustus
Publisher : Pascasarjana Universitas Negeri Medan

Abstract. Rhodamine B is a synthetic dye that can not be used as food additives and harmful if it enters the body, causing oxidative stress if continued resulting in cell membrane damage and cell death, but until now its use is still found in industrial-scale food production and household . The aim of research to determine the effect of rhodamine B exposure and after cessation of exposure rhodamine B (recovery period) to the macroscopic and histopathological changes in the colonic mucosa of mice (Mus musculus L.) males. This study tested an experimental laboratory to design the post-test only control group. The research subject of male mice (Mus musculus L.) strains DD Webster, 6-7 weeks, 25-40 grams, 28 were divided 2 treatment groups: (1) P0 (control) were given distilled water 0,3ml, (2) rhodamine B dose 0.2% / day, 0,3ml. Treatment for 21 days, then continued for 7 days without any treatment to see his cell recovery. The results showed a significant increase (p <0.5) macroscopic colonic damage and histopathology colonic mucosa in the treatment group compared with the control group when treated well after treatment is stopped. Expected to society, especially with children under five and school age do not consume snacks bright. Keywords: rhodamine B, macroscopic, histopathology, colon mucosa

Effect of School Based Management on Teacher Job-Satisfaction and Job-Performance Wesly Hutabarat
Jurnal Pendidikan Kimia (JPKim) Vol 7, No 2 (2015): Agustus
Publisher : Pascasarjana Universitas Negeri Medan

Abstract. Introduction of Weber’s organizational structure into Indonesian Educational system since the Dutch colonial resulted in a difficult time. The use of Weber ‘s organizational structure had made it difficult for teachers to make decisions concerning with schools facilities, curriculum, and student recruitment. The school principals usually had to wait for sometimes from their superintendents to make decisions concerning with school facilities, curriculum and student recruitments. Introduction of School based management into Indonesian Educational system since 2003 has made a great impact on teacher job satisfaction and job-performance. Recent studies showed that 57.30% of school based management directly contributed to job satisfaction and indirectly 11.10% contributed to job satisfaction through work motivation. Further investigation reported that total effect of school based management toward job-satisfaction and job-performance were 48.4% and 30.8% respectively. It was concluded that school based management contributed a great impact on teacher job-satisfaction and job-performance. Key words: job-performance, job-satisfaction, school based management

Pemanfaatan Arang Aktif Dari Batubara Kotor (Dirty Coal) Sebagai Adsorben Ion Logam Mn(II) dan Ag(I) Saibun Sitorus; Meliani Pijer
Jurnal Pendidikan Kimia (JPKim) Vol 7, No 2 (2015): Agustus
Publisher : Pascasarjana Universitas Negeri Medan

Abstract. The research has done about use of activated carbon as an adsorben of dirty coal in metal ions Mn(II) and Ag(I). This research was intended to find the effects of pH value, contact period and to determine the maximum adsorptive capacity Mn(II) and Ag(I) metal ions by dirty coal activated carbon. The adsorption process have been variate of pH 2, 3, 4, 5, 6, 7 and 8; contact time variation 15, 30, 45, 60 and 75 minutes; concentration variation 30, 45, 60, 75, 105, and 120 mg/L. The adsorption capacity determinate of Mn(II) and Ag(I) metal ions by dirty coal activated carbon used Isoterm Langmuir. The analysis of metal ions Mn(II) and Ag(I) concentration by dirty coal activated carbon by using atomic absorption spectrophotometer (AAS). The result of this research shows that dirty coal activated carbon could adsorb metal ion Mn(II). The optimum condition was achieved at the pH 6 with a number of metal ions that adsorbed at 23,4265 mg/L, with optimum period of 30 minutes with a number of metal ions that adsorbed at 23,9939 mg/L, as for optimum concentration was achieved at the cosentration 90 mg/L with a number of metal ions that adsorbed at 56,5518 mg/L and metal ion adsorption capacity of Mn(II) adsorbed by the dirty coal activated carbon could reach 34,4827 mg Mn/g. As for the adsorption of metal ions Ag(I) the optimum condition was achieved at the pH 7 with a number of metal ions that adsorbed at 20,5000 mg/L. Keywords: dirty coal, activated carbon, adsorption, metal ions Mn(II), metal ions Ag(I)

Pengaruh Lama Kerja Terhadap Kadar Merkuri (Hg) Dalam Urin Pekerja Tambang Emas (Studi kasus di Desa Panton Luas Kecamatan Sawang Kabupaten Aceh Selatan) Nur Asiah; Zul Alfian; Jazanul Anwar; Yahwardiah Siregar; Datten Bangun
Jurnal Pendidikan Kimia (JPKim) Vol 7, No 2 (2015): Agustus
Publisher : Pascasarjana Universitas Negeri Medan

Abstract. Mercury (Hg) is a heavy metal that is a major concern in terms of health because it is toxic to humans. This study aims to determine the effect of long working on levels of mercury (Hg) in the urine of a gold miner in the village of Panton Luas Sawang District of South Aceh. The sampling technique is total sampling as many as 30 people. The results showed that the levels of mercury in the urine of the highest gold mine workers was 3.8 μg/l and the lowest was 2.0 μg/l with mean 2.82 μg/l (SD ± 0.57), the results Chi-square test showed that the length of work to give effect to the levels of mercury in the urine of miners (p = 0.046). Further research is recommended in order to see the difference in mercury levels in people who are exposed to mercury directly with a gold miner who was not involved in the amalgamation process and the local community at risk of exposure to mercury pollution from mining activities in the village and examine the population residing in other villages in the district mentioned. Keywords: length of work, levels of mercury, urin

Pengembangan Bahan Ajar Inovatif dan Interaktif Melalui Pendekatan Saintifik Pada Pengajaran Termokimia Erdiana Gultom; Manihar Situmorang; Ramlan Silaban
Jurnal Pendidikan Kimia (JPKim) Vol 7, No 2 (2015): Agustus
Publisher : Pascasarjana Universitas Negeri Medan

Abstract. This study aims to obtain innovative and interactive teaching materials integrated scientific approach and involves a web-based information technology. This type of research, including research and development (research and development). Subjects were subject thermochemical teaching materials. Meanwhile, the sample used in this study consisted of 20 students majoring in chemistry chemistry education courses of the Faculty of Mathematics and Natural Sciences, University of Medan and 3 lecturers basic courses at the State University of Medan. Selection of the sample using purposive sampling technique. The results of chemical analysis of teaching materials common is that the teaching materials are quite valid, but need to be developed from various aspects. Teaching materials that have been developed validated by expert validator. Assessment is done based on a standard questionnaire BSNP (National Education Standards Agency). Based on research data obtained an average of 23 respondents think that consists of 3 professors and 20 students on the quality of teaching materials developed 3.49 belonging to the criteria of a very valid means of the development of teaching materials is very feasible for use in learning. Elaboration of the overall average respondent to the quality of teaching materials developed are the average results of the assessment of General Chemistry lecturers in the amount of 3.66 and an average student assessment results Chemistry education that is equal to 3.31. Keywords: research and development (R&D), thermochemical, scientific approach

Pengembangan Bahan Ajar Kimia Inovatif pada Pokok Bahasan Reduksi dan Oksidasi Berdasarkan Kurikulum 2013 Terintegrasi Pendidikan Karakter Elisabet Singarimbun; Ramlan Silaban; Retno Dwi Suyatni; Iis Siti Jahro; Manihar Situmorang
Jurnal Pendidikan Kimia (JPKim) Vol 7, No 2 (2015): Agustus
Publisher : Pascasarjana Universitas Negeri Medan

Abstract. This study aims to determine: (1) whether the chemical innovative teaching materials developed for SMA / MA class X second semester on the subject of the oxidation reduction was decent and in accordance with the curriculum, 2013. (2) Does the use of innovative teaching materials chemistry development results provide results better learning for SMA / MA class X second smester with the students taught without the use of chemicals innovative teaching materials that have been developed based on the curriculum of 2013. (3) Does the use of innovative teaching materials chemistry results can foster the development of a better character to students SMA / MA X class second semester than students taught without the use of chemicals innovative teaching materials that have been developed based on the curriculum of 2013. This study uses qualitative data described through a questionnaire with eligibility sheet book contains indicators of assessment from the National Standards Body .Education (BSNP) and quantitative data to determine the effectiveness of the use of the results of Instructional Materials for learning outcomes and student character. The study population was all students in the second semester of class X SMA Negeri 1 Salapian, SMA 1 and SMA Kuala 1 Bahorok. The treatment sample of 2 classes of experimental class I and class II experiment at each school. Data collected by an objective test for student learning outcomes before and after the learning process, a questionnaire to measure the character sheet. Data were analyzed using SPSS 17.0 with a significance level of 0.05. The results of the assessment form validation mean to determine the feasibility of innovative teaching materials Oxidation Reduction. The results were obtained: (1) innovative teaching materials developed for the oxidation reduction SMA / MA class XI second semester was decent and in accordance with the curriculum in 2013 based on the results of the feasibility of standardizing the contents of 3.63, standardize language feasibility3.64, feasibility standardize the presentation of 3,66, standardization grafic of 3.67 (2) There are significant differences chemistry student learning outcomes SMA / MA Class X second semester is taught with the use of innovative teaching materials on the subject of chemical oxidation reduction that has been developed based on the curriculum in 2013 is higher than the student learning outcomes are taught without the use of innovative teaching materials on the subject of chemical oxidation reduction that has been developed based on the curriculum of 2013. (Sig.1-tailed <α (0.000 <0.05)) (3) There are significant differences of character development of students SMA / MA Class X second semester is taught with the use of innovative teaching materials on the subject of chemical oxidation reduction that has been developed based on the curriculum in 2013 is higher than the character development of students who are taught by without the use of innovative teaching materials on the subject of chemical oxidation reduction that has been developed based curriculum in 2013. Keywords: teaching material reduction of oxidation, front page, learning outcomes, communicative, responsibility jawab. kreativity

Pengaruh Pemberian Kacang Hijau (Phaseolus radiatus) Terhadap Peningkatan Kadar Hemoglobin Tikus Putih (Rattus norvegicus) Jantan Galur Wistar Nora Maulina; Indra Pehulisa Sitepu
Jurnal Pendidikan Kimia (JPKim) Vol 7, No 2 (2015): Agustus
Publisher : Pascasarjana Universitas Negeri Medan

Abstract. Mung beans (Phaseolus radiates) are a kind of legume which green round and oval. Mung beans contain substances that are required for the formation of blood cells so as to overcome the effects of decrease Hb. Mung beans can function on formation red blood cells contain substances that are needed by the body for the maturation and formation of blood cells and prevent anemia because phytochemical substances on mung beans very complete so it can help the process of hematopoiesis. The purpose of the research is to explore effect of mung beans to increase Hb of rats (Rattus norvegicus). This research used 27 male white rats species Rattus norvegicus strain wistar. Male white rats were divided into 3 groups, 1 control group and 2 treatment groups. Control group was given aqua ad libitum for 7 days, Treatment group was given mung beans with gradual dose of 18 and 36 gr/kgBB/day. The result of data analysis with Kruskal Wallis test showed a P value 0,003 (p < 0,05), thus obtained significant differences in mean Hb levels after given mung beans. The result showed that giving mung beans affect the increase in Hb concentration white male rats. Keywords : Hb, mung beans, rats

Potensi Ekstrak Etanol Daun Lidah Buaya (Aloe vera L.) Sebagai Antifertilitas Melalui Tampilan Imunohistokimia Caspase 3 Aktif Pada Testis Serta Penilaian Kuantitas dan Kualitas Spermatozoa Mencit (Mus musculus L.) Maria Lestari; M Pandapotan Nasution; Sry Suryani
Jurnal Pendidikan Kimia (JPKim) Vol 7, No 2 (2015): Agustus
Publisher : Pascasarjana Universitas Negeri Medan

Abstract. Control of male fertility is one of the goverment efforts to reduce the number of population. Several researches have been done to make a male contraceptive, one of them is using herb to effect male reproductive system. Aloe vera (Aloe vera L.) has been widely cultivated by the people and used as materials for food and drugs. One of the benefits of this plant is it’s potential antifertility. For this research aims to test the antifertility potential of ethanol extract in Aloe vera (Aloe vera L.) leaf. in male mice (Mus musculus L.) DDW (Double Ditch Webster) strain. This is an experimental research with complete randomization. Extract administered orally once a day for four weeks to of 24 male mice which divided into four groups: control group (0.5 ml/kgBW Aqudest), treatment group dosage 5mg/kgBW, 10mg/kgBW, 15mg/kgBW extract. We observed the expression of active caspase-3 microscopically through immunohistochemical appearance, quantity (number of spermatozoa) and quality (viability of sperm, sperm morphology and motility). The results were statistically analyzed using one-way ANOVA followed by multiple comparison (post hoc - Bonferroni test). The results showed between ethanol extract of Aloe vera leaf with the first dosage (5mg/kgBW), second dosage (10mg/kgBW) and the third dosage (15mg/kgBW) a significant reduction of the quantity and quality of spermatozoa (p <0.05). on the other hand activity of caspase 3 expression active has increased significantly (p<0.05) in spermatogonial cells of seminiferous tubules during the administration of ethanol extract of Aloe vera (Aloe vera L.) leaf. This shows an increase in the incidence of apoptosis during spermatogenesis. From these results it can be concluded that the ethanol extract of Aloe vera leaf has potency to be an antifertility drug that can later be developed for the manufacture of male contraception. Keywords: aloe vera extract, caspase-3, spermatozoa, quantity, quality

Pengembangan Bahan Ajar Inovatif dan Interaktif Melalui Pendekatan Saintifik Pada Pembelajaran Reaksi Redoks dan Elektrokimia Marham Sitorus; Ajat Sudrajat; Mega Lestari
Jurnal Pendidikan Kimia (JPKim) Vol 7, No 2 (2015): Agustus
Publisher : Pascasarjana Universitas Negeri Medan

Abstract. This study aims to obtain innovative and interactive teaching materials integrated scientific approach and involves a web-based information technology. This type of research, including research and development (research and development). Subjects were subject redox reaction and electrochemistry teaching materials. Meanwhile, the sample used in this study consisted of 20 students majoring in chemistry chemistry education courses of the Faculty of Mathematics and Natural Sciences, University of Medan and 2 lecturers basic courses at the State University of Medan. Selection of the sample using purposive sampling technique. The results of chemical analysis of teaching materials common is that the teaching materials are quite valid, but need to be developed from various aspects. Teaching materials that have been developed validated by expert validator. Assessment is done based on a standard questionnaire BSNP (National Education Standards Agency). Based on research data obtained an average of 22 respondents think that consists of 2 professors and 20 students on the quality of teaching materials developed 3.22 belonging to the criteria of a very valid means of the development of teaching materials is very feasible for use in learning. Elaboration of the overall average respondent to the quality of teaching materials developed are the average results of the assessment of General Chemistry lecturers in the amount of 3.40 and an average student assessment results Chemistry education that is equal to 3.04. Keywords: research and development (R&D), redox reaction and electrochemistry, scientific approach

Upaya Meningkatkan Kreativitas Siswa Dalam Pembelajaran Biologi Melalui Penerapan Model Pembelajaran Kooperatif Type Jigsaw di SMA Negeri 2 Balige Pasno Lingga
Jurnal Pendidikan Kimia (JPKim) Vol 7, No 2 (2015): Agustus
Publisher : Pascasarjana Universitas Negeri Medan

Abstract. This classroom action research is executed in class XI IA2 Semester 2 of SMA Negeri 2 Balige academic year 2011/2012, aim to know whether model of co-operative of leraning Jigsaw type can improve student creativity in course study of Biology at System Hormone and Indra. Research of method is taken by writing down dominant perception category emerge during take place at perception sheet ( Instrument). In intake of data, researcher presents directly of study items as many as 4 cycle. Every cycle consists of four phrases. They are planning, action, observation, and Reflection. Every cycle assisted by 2 people as observer to collect uppermost student creativity data at the same time give suggestion / inputs repair of study process. Cycle of I by applying conventional method (discussion and discourse) while cycle of II, III, and IV by applying model of co-operative of learning Jigsaw type. From result of observation and perception analyse data obtained by conclusion that model of co-operative of learning Jigsaw type can improve class student creativity of XI IA2 SMA Negeri 2 Balige in course study of Biology hormone system and Indra of student creativity mean 59,80 at conventional study become 77,13 (the first group) and 85 % ( expert team), second cycle, 83,24 (the first group) and 92,95% ( expert team), third cycle and 85,09 ( the first) and 95,45 % (expert team) at fourth cycle by applying model study of jigsaw. The result of examination with using convensional method only 8 students, but using model of cooperative of learning jigsaw type, the student can be able more b competence and improving to be 22 student. The conclution of the study shows that implementation cooperative of learning jigsaw type accompany with modul about contamination and enviromental change can improve student learning activity in class XI IA2 at SMA Negeri 2 Balige in academic year 2011/2012. Keywords: Cooperative Learning model, Jigsaw, creativity student

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