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INDONESIA
Jurnal Akademika Kimia
Published by Universitas Tadulako
ISSN : 24775185     EISSN : 23026030     DOI : -
Core Subject : Science, Education,
Chemistry Education
Jurnal Akademika Kimia merupakan jurnal elektronik open access yang bertujuan untuk mempublikasi hasil-hasil penelitian terbaru dalam area pendidikan akademik khususnya pada bidang pendidikan kimia meliputi asesment pembelajaran, model pembelajaran dan pengembangan perangkat pembelajaran, serta kimia murni termasuk kimia organik, kimia anorganik, kimia analitik, kimia fisik, biokimia dan bidang kimia lainnya seperti kimia lingkungan.
Arjuna Subject : -
Articles 12 Documents
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Search results for , issue "Vol 6, No 1 (2017)" : 12 Documents clear
Front Matter JAK Vol. 6 No. 1 2017 Walanda, Daud K.
Jurnal Akademika Kimia Vol 6, No 1 (2017)
Publisher : Universitas Tadulako

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Abstract

Penerapan Pendekatan Saintifik Melalui Model Pembelajaran Kooperatif Tipe Jigsaw Di Kelas X SMA Negeri 9 Palu Pada Materi Stoikiometri Saldi, Heri; Nuryanti, Siti; Sakung, Jamaluddin
Jurnal Akademika Kimia Vol 6, No 1 (2017)
Publisher : Universitas Tadulako

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Abstract

This study aims to determine the influence of implementation a scientific approach through cooperative-jigsaw learning model on Stoichiometry to the learning achievement of students in class X at SMAN 9 Palu. The method was a quasi experiment with pretest-posttest control group design. The population was students of class X SMA Negeri 9 Palu, where the sample was class XB as the experimental group (n = 29) and class XA as the control group (n = 27), determined by purposive sampling technique. Data were analyzed using nonparametric statistical Mann-Whitney U-Test analysis. The results showed output “Rank” for the mean value of the experimental class was greater than the control class, 33.14 ˃ 23.52. The output of “Test Statistics”, Sig. 2-Tailed (0,026) ˂ 0.05 and Zcount(-2.23) ˂ Ztable (-1.96), as well as each classical completeness and absorption for experimental class were 79% and 83%, while for the control class were 59% and 75%. This study concluded that scientific approach through cooperative-jigsaw model on Stoichiometry influenced positively to the learning achievement of students in class X at SMA Negeri 9 Palu.
Meningkatkan Aktivitas Dan Hasil Belajar Siswa Pada Pembelajaran Kimia Penyetaraan Reaksi Redoks Melalui Lesson Study Di Kelas XII IPA SMA Negeri 2 Palu Chairunnisa, Chairunnisa; Supriadi, Supriadi; Rahman, Nurdin
Jurnal Akademika Kimia Vol 6, No 1 (2017)
Publisher : Universitas Tadulako

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Abstract

The research about the balancing of redox reaction on chemistry subject has been done. This research was conducted on class XII IPA8 SMA Negeri 2 Palu with 28 of the student, in the first semester of the academic year 2014-2015. The research method used is a descriptive qualitative in which data processing use percentages and rating scale. The data is collected by observation sheets, questionnaires, and documentation. Implementation of lesson study on class XII IPA8 SMA Negeri 2 Palu is conducted in three meetings time (open class) with 3 phases; plan, do and see, respectively. Based on the results obtained every meeting by the researcher, the data activity of students is rising by 54.93, 59.86, and 74.30%. Furthermore, at the third meeting, the data obtained is an excellent category which means the student’s activity in the lesson study was increased. These prove that through the lesson study can increase the activity of the learning process of students. In addition, based on the data analysis of the student’s learning outcomes during three meeting times is increased. Average of completeness of student’s learning outcomes of every meeting is 67.85, 85.71, and 100%, respectively. Again, these prove that the student’s learning outcomes by classical can be increased through the lesson study.
Pengaruh Kaolin Terhadap Membran Blend Kitosan Poli Vinil Alkohol-Litium Sebagai Membran Elektrolit Untuk Aplikasi Baterai Ion Litium Gonggo, Siang Tandi; Diah, Anang Wahid M.; Lanteene, Reki
Jurnal Akademika Kimia Vol 6, No 1 (2017)
Publisher : Universitas Tadulako

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Abstract

Today, the battery is the most practical and in expensive energy storage device in a modern community. A variety of new materials technologies has been developed in the manufacture of the battery, especially the development of the solid electrolyte (solid). Polymer Electrolytes can be found in the polymer batteries form such as lithium ion polymer battery. A natural polymer such as chitosan is potential as polymer electrolyte membrane for battery applications. The chitosan has amino and hydroxyl groups that allow for modification. The modification of chitosan membrane is expected to produce the better membranes characters. The aim of this research is to study the effect of the addition of inorganic filler kaolin on the conductivity of the polymer electrolyte that made of chitosan-polyvinyl alcohol than was added to the lithium salt. The ionic conductivity of the polymer electrolyte chitosan-polyvinyl alcohol-lithium-kaolin was measured by using an impedance spectroscopy. The measurement results showed that the polymer electrolyte chitosan-polyvinyl alcohol-lithium with the addition of 4% kaolin provide the highest ionic conductivity is large 6.551x10-5 S/cm. In comparison, characteristics of batteries that made from polymer electrolyte chitosan-polyvinyl alcohol-lithium with the addition of kaolin have a voltage of 2.4 volts which have similarities to the commercial batteries. This result indicates that the kaolin can be used as a filler to increase the ionic conductivity of the polymer electrolyte chitosan-polyvinyl alcohol-lithium, and then it can be developed as a battery.
Efek Ekstrak Buah Srikaya (Annona Squamosa L.) Terhadap Penurunan Tekanan Darah Pada Mencit (Mus musculus) Fitriani, Fitriani; Walanda, Daud K.; Ningsih, Purnama
Jurnal Akademika Kimia Vol 6, No 1 (2017)
Publisher : Universitas Tadulako

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Abstract

The research aim is to determine the effect of sugar-apple fruit extract on the reduction of blood pressure in mice as the tested animal. The sugar-apple extract was obtained through maceration method with the ratio of sugar-apple fruit powder and water 1:10, after that the heating was done to produce the extract in solid form, then the potassium content was measured by using a spectrophotometer and male mice were induced by adrenaline injection, namely epinephrine. The mice were divided into 5 groups randomly with different treatment. P1 was as a negative control (-), P2, P3, P4 were given the sugar-apple extract with the doses of 50, 100 and 150 mg/kg BW respectively, while P5 was as positive control (+) that was given captopril. The data obtained were analyzed by the statistical analysis, the analysis of variance (ANOVA) and was followed by Duncan’s test. The result obtained that on preclinical testing revealed that the sugar-apple extract was proven to reduce the blood pressure of mice and the effective extract was the concentration of 150 mg/kg with the average blood pressure of 48 mmHg.
Pengaruh Aktivasi Kimia Arang Tanaman Eceng Gondok (eichhornia crassipes) Terhadap Adsorpsi Logam Timbal (Pb) Sangkota, Vivi Dia A.; Supriadi, Supriadi; Said, Irwan
Jurnal Akademika Kimia Vol 6, No 1 (2017)
Publisher : Universitas Tadulako

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Abstract

This study aimed to determine the optimum pH and the optimum weight of charcoal and activated charcoal from water hyacinth in adsorbing the lead (Pb) metals. Determination of adsorbed metal content in the charcoal and the activated charcoal was measured using a spectrophotometer spectrodirect. Activated water hyacinth charcoal was prepared by carbonization in a furnace at a temperature of 300 oC in low oxygen levels. Then the carbon was activated by adding ZnCl2 10%, soaked for 24 hours, filtered and placed in the oven at a temperature of 105 0C for 1 hour. The optimum pH was determined by mixing Pb2+ with water hyacinth (eichhornia crassipes) charcoal at various pH of 3-8. The results indicated the optimum pH of charcoal and activated charcoal to adsorb metals was 5 with the percentages of lead absorbed were 90.34% and 98.67%, respectively, while the weight of charcoal varied by 25, 50, 75, 100 and 125 mg, the optimum weight of activated charcoal was 100 mg with lead absorbed by 98.44%. The results showed that the water hyacinth charcoal and activated charcoal performed excellent ability to adsorb lead metal.
Pengaruh Pemberian Ekstrak Buah Kelor (Moringa oleifera) Terhadap Penurunan Kadar Kolestrol Pada Darah Hewan Mencit (Mus musculus) Zulviana, Eva; Rahman, Nurdin; Supriadi, Supriadi
Jurnal Akademika Kimia Vol 6, No 1 (2017)
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Abstract

This study aimed to identify bioactive compounds of moringa (moringa oleifera) extracts and determine the effective concentration on lowering blood cholesterol levels of mice. The animals used were 15 male mice induced by propylthiouracil and fat food diet. The mice were divided randomly into 5 groups with different treatment groups. The first, the second, and the third treatments were given moringa extracts each with a concentration of 10, 20% and 40%. The fourth treatment group was given food fat diet and propiltiorasil as a positive control, and the fifth treatment was given standard food and distilled water as a negative control. Data were analyzed using a statistical analysis of variance (ANOVA) test followed by Duncan test. The results showed that moringa fruit extract contains alkaloids, saponins, flavonoids, and tannins. Moringa fruit extract can lower blood cholesterol levels of mice with the most effective concentration of 10%.
Analisis Senyawa Metabolit Primer Pada Jamur Merang (Volvariela volvaceae) Di Daerah Perkebunan Kelapa Sawit Lalundu Wahidah, Nur; Ratman, Ratman; Ningsih, Purnama
Jurnal Akademika Kimia Vol 6, No 1 (2017)
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Abstract

Lalundu region is located in Central Sulawesi where we can find many mushrooms (volvariela volvaceae). The aim of this study is to determine the levels of primary metabolites of mushroom at the regional oil palm plantations Lalundu. The analysis of carbohydrates level was using a UV-vis Spectrophotometer, for protein using a Spectro Direct while for fat by soxhlet. Based on the results of the analysis, the levels of carbohydrates obtained was 7.35% in 1 gram mushroom. The protein content obtained was 1,67% while the fat content results were 2.53%. These indicate that the primary metabolite levels in mushroom at Lalundu region are very high compared to literature.
Pengaruh Ekstrak Tanaman Putri Malu (Mimosa pudica Linn) Terhadap Penurunan Kadar Glukosa Darah Pada Mencit (Mus musculus) Mustapa, Kasmudin; Rizky, Amalia; Jura, Minarni Rama
Jurnal Akademika Kimia Vol 6, No 1 (2017)
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Abstract

The research aim is to determine the effect of mimosa plant (mimosa pudica Linn) to reduce blood sugar levels in mice and determining the effective concentration of mimosa plant extracts as an alternative to decrease blood sugar levels. The extract is produced by the infusion method. The animal test used is male mice with amount 18 mice that induced by EDTA (ethylene diamine tetraacetic acid). Mice are divided into 6 groups randomly with different treatment. The group I, II, III and IV were given the mimosa plant extract with a concentration of 10, 20, 30, and 40% (w/v) respectively while group V is given glibenclamide suspension as positive control (+) and group VI is given Na-CMC 1% as negative control (-). Data were analyzed using the statistical test analysis of variance (ANOVA) and then followed by Duncan test. The results showed that the mimosa plant extract contains flavonoids, alkaloids, and tannins. In preclinical testing of mimosa plant extract proven to reduce blood sugar levels in mice and the most effective concentration is a concentration of 20% (w/v) with significantly α = 0.05.
Back Matter JAK Vol 6 No 1 2017 Walanda, Daud K.
Jurnal Akademika Kimia Vol 6, No 1 (2017)
Publisher : Universitas Tadulako

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Abstract

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