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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 10 Documents
 1 
Search results for , issue "Vol 7, No 2 (2018)" : 10 Documents clear
Kondisi Optimum Adsorpsi Arang Hayati dari Kulit Pisang Raja (Musa X paradisiaca L.) terhadap Logam Timbal (Pb) dan Tembaga (Cu) Tanggebono, Iren S. A.; Tiwow, Vanny M. A.; Jura, Minarni Rama
Jurnal Akademika Kimia Vol 7, No 2 (2018)
Publisher : Universitas Tadulako

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Abstract

This study aimed to determine the optimum condition of biocharcoal from banana peel on adsorption of lead (Pb) and copper (Cu) metals based on the variation of weights and biocharcoal contact times. Banana peel used in this research were taken from Sidondo III the village, Sigi, Central Sulawesi. To determine absorbed metals in biocharcoal banana peel was measured by a spectrophotometer spectroDirect. The results showed that the optimum weight of adsorption lead (Pb) ion was 80 mg and copper (Cu) ion was 40 mg with each percentage adsorption of 73.91% and 21.23%, respectively. The optimum time to adsorb lead and copper ions was 90 minutes with the percentage adsorption of 89.13% for lead ion and 25.86% for copper ion.
Penerapan Model Pembelajaran Kooperatif Tipe Make A Match pada Materi Ikatan Kimia pada Siswa Kelas X SMA Negeri 3 Palu Usia, Mirdawati; Tiwow, Vanny M. A.; Sabang, Sri Mulyani
Jurnal Akademika Kimia Vol 7, No 2 (2018)
Publisher : Universitas Tadulako

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Abstract

This study aimed to determine differences the learning outcomes of students in class using the cooperative learning model type make a match with class using conventional in the chemical bonding material in class X SMA Negeri 3 Palu. Type of research was a quasi-experimental design with non randomized pretest-posttest control group design. This research was carried out in two class of class X MIA 6 as an experimental group (n = 32) and class X MIA 7 as a control group (n = 30). Testing of learning outcomes of students data used t-test statistical analysis of the two parties with the prerequisite test: test for normality and homogeneity of a written test given after learning (posttest). The results of the data analysis, the average values obtained of class experiment (X1) was 69.00 with a standard deviation 10.66 and control class (X2) was 64.73 with a standard deviation was 11.38. Results of hypothesis testing, obtained that tcalct = 2.14 and ttable = 2.00 with a= 0.05 and degrees of freedom of 60. Results of the calculation the express that H0 was rejected and Ha was accepted. Based on the results obtained, it can be concluded that there were differences between the learning outcomes of students in chemistry class that using cooperative learning model type make a match, with the class using conventional on chemical bonding material in class X SMA Negeri 3 Palu.
Penerapan Model Pembelajaran Kolaboratif dengan Teknik Think Aloud Pair Problem Solving pada Materi Hidrokarbon Siswa Kelas X SMA Negeri 6 Palu Durufin, Ekanovi Pratiwi A.; Sabang, Sri Mulyani; Said, Irwan
Jurnal Akademika Kimia Vol 7, No 2 (2018)
Publisher : Universitas Tadulako

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Abstract

This study was conducted to determine differences of the student’s learning outcomes that was applied by collaborative learning model with technique think aloud pair problem solving (TAPPS) and was applied by lecture method in the hydrocarbon material against the student’s learning outcomes in class X SMAN 6 Palu. The collaborative learning model was think aloud pair problem solving technique on the hydrocarbon material class X SMAN 6 Palu. The type of research was a quasi-experimental with research design pretest posttest control group design. Population in this research was whole students in class X SMAN 6 Palu, academic year 2015-2016 consisting of six classes totaling 115. The sampling technique used was a purposive sampling. The samples in this research was an experiment class with 17 students and a control class with 8 students. Data analysis techniques used was non-parametric and statistical method of Mann-Whitney U-test. Research result showed the output Rank for mean score of the experiment class was bigger than the control class 22.41 ˃ 13.83. The output statistics test, Sig. 2-tailed (0.13) 0.05 ˂ and Ucalculation (78) ˂ Utable (93). From the findings of hypothesis testing, H0 was rejected and Ha was accepted then it can be concluded that there were significant differences learning outcomes in the student’s with the collaborative learning model technique think aloud pair problem solving (TAPPS) with the lecture method on the hydrocarbon material against the learning outcome of students in class X SMAN 6 Palu.
Uji Aktivitas Antioksidan Ekstrak Buah Kluwih (Artocarpus Communis) Arif, Mohammad; Rahman, Nurdin; Supriadi, Supriadi
Jurnal Akademika Kimia Vol 7, No 2 (2018)
Publisher : Universitas Tadulako

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Abstract

This study aimed to determine antioxidant activity of artocarpus camansi fruit extracts from Sigi, Central Sulawesi. This study was conducted by maceration extraction technique, and 2,2-diphenyl-1-picrylhydrazyl (DPPH) as the source of free radicals, and vitamin C as a positive control. UV-Vis spectrophotometer was used for measuring the absorbance of artocarpus camansi fruit extracts. artocarpus camansi fruit powder was extracted by maceration using ethanol. Various concentrations of artocarpus camansi fruit extracts used were 20, 40, 60, and 80 mg/L. The results showed that the IC50 value for artocarpus camansi (artocarpus communis) fruit extract was 88.715 mg/L, whereas the IC50 value for vitamin C was 37.153 mg/L. Artocarpus camansi (artocarpus communis) fruit extracts are powerful antioxidants category based on IC50 value. The optimum percentage antioxidant activity of artocarpus camansi fruit extracts to inhibit free radical amounted to by 50.65%
Penentuan Kadar Flavonoid dan Vitamin C dalam Umbi Bawang Hutan (Eleutherine bulbosa (Mill) Urb) yang Berasal dari Desa Matantimali Kabupaten Sigi Karmila, Karmila; Jura, Minarni R.; Tiwow, Vanny M. A.
Jurnal Akademika Kimia Vol 7, No 2 (2018)
Publisher : Universitas Tadulako

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Abstract

This study aimed to determine flavonoids and vitamin C levels contained in forest onion bulbs (Eleutherine bulbosa (Mill) Urb). Determination of the levels of flavonoids in forest onion bulbs extracted by maceration in etanol-HCl 1%, while vitamin C is extracted with 96% ethanol. Flavonoids and vitamin C levels in samples of forest onion bulbs were determined using UV-Vis spectrophotometer. The result showed that the flavonoids levels obtained was as much as 13.4058 mg/ 100 g, while vitamin C levels was as much as 31.678 mg/100 g.
Penerapan Model Pembelajaran Kolaboratif dengan Teknik Learning Cell pada Materi Kelarutan dan Hasil Kali Kelarutan Pada Siswa Kelas XI SMA Negeri 6 Palu Panontji, Putri Ningsi A.; Sabang, Sri Mulyani; Mustapa, Kasmudin
Jurnal Akademika Kimia Vol 7, No 2 (2018)
Publisher : Universitas Tadulako

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Abstract

This study was conducted to determine the difference on students learning outcomes in the classroom implemented with collaborative learning model using cell learning technique on the topic of solubility and solubility product in the class XI at SMAN 6 Palu. This study was a quasi-experiment research with pretest-posttest control group design. Population in this study were students of class XI IPA at SMAN 6 Palu enrolled in the academic year of 2015-2016 amounting to 43 student. Sampling technique was a sampling saturated. Samples in this study were 21 students in the class XI IPA2 as the experimental class, and 22 students in the class XI IPA1 as the control class. The results showed that the output rank for the mean value of the experimental class was bigger than the control class, 30.29> 14.09. The output statistic test showed sig. 2-tailed 0.00 < 0.05, and Zcount (-4.25) < Ztable (-1.64). These mean that H0 was rejected and Ha was received. Therefore, it can be concluded that there is significant difference in learning outcomes between the class which implement collaborative learning model with learning cell technique, and the classes which implement traditional learning model on the topic of solubility and solubility product in the Class XI at SMAN 6 Palu.
Pembuatan Pupuk Organik Cair dari Limbah Jeroan Ikan Cakalang (Katsuwonus pelamis) Suartini, Komang; Abram, Paulus H.; Jura, Minarni Rama
Jurnal Akademika Kimia Vol 7, No 2 (2018)
Publisher : Universitas Tadulako

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Abstract

This study aimed to determine the production of liquid organic fertilizer from offal waste of tuna (Katsuwonus pelamis) by bakasang method,and determined content levels of N, P, and K in liquid organic fertilizer. Levels of nitrogen (N), phosforus (P), and potassium (K) were analyzed using the spectrophotometer Spectro Direct. The results showed that at 5 days of fermentation obtained N, P, and K by 2.49%,1.05%, and 0.98%, respectively, while at 10 daysof fermentation obtained amounted to by 3.74%, 3.20%, and 1.03%, respectively. Fertilizer with bakasang method of manufacture can be done on a 10 day fermentation.
Uji Aktivitas Antioksidan Ekstrak Buah Semangka (Citrullus lanatus) Mariani, Sri; Rahman, Nurdin; Supriadi, Supriadi
Jurnal Akademika Kimia Vol 7, No 2 (2018)
Publisher : Universitas Tadulako

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Abstract

The aim of this study is determine the IC50 extracts values of white peel and flesh of red watermelon, white peel and flesh of yellow watermelon as antioxidants. To determine antioxidant activities DPPH reagent was used as well as UV-Vis Spectrophotometry was used to measure vitamin C as a positive control measurement. The samples mixed with ethanol in various concentration of 5, 15, 25 and 35 mg/L. The results showed that the IC50 values for each extract of red watermelon flesh, yellow watermelon flesh, white peel of red watermelon, and white peel of yellow watermelon were 16.619 mg/L, 16.575 mg/L, 14.729 mg/L, and 16.782 mg/L, respectively. Vitamin C as the positive control has IC50 value of 9.526 mg/L. These IC50 values showed that vitamin C had higher antioxidant activity than watermelon extracts, but the extracts of watermelon still categorized in strong natural antioxidants. This study concluded that watermelon is good to be consumed because it is a very strong antioxidant.
Pengaruh Model Pembelajaran Advance Organizer Terhadap Hasil Belajar Siswa SMA Negeri 3 Sigi pada Materi Larutan Elektrolit dan Non Elektrolit Maryam, Maryam; Ratman, Ratman; Ningsih, Purnama
Jurnal Akademika Kimia Vol 7, No 2 (2018)
Publisher : Universitas Tadulako

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Abstract

This study aimed to determine the influence of advance organizer learning model toward learning achievements of students at SMA Negeri 3 Sigi on the topic electrolyte and non-electrolyte solutions. This study was a quasi-experiment with pretest-posttest control group design using two groups of students, i.e. 34 Class X B as an experimental group , and 34 Class X A as a control group. Data of learning achievements of students was analyzed using t-test two parties statistical analysis. Results showed that the average values of experiment class (X1) was 77.15 with a standard deviation of 11.59, while the average values of control class (X2) was 68.44 with a standard deviation of 10.73. This testing hypotheses with statistical t-test two parties obtained -ttable ≤ tcount ³ + ttable (tcount = 10.89 and ttable = 2.00) with a significant level a = 0.05, and degrees of freedom 66. Therefore, H0 was rejected, and HI was accepted. This study concluded that advance organizer learning model influenced learning achievements of students at SMA Negeri 3 Sigi on the topic electrolytes and non-electrolyte solutions.
Pengaruh Penerapan Model Pembelajaran Kooperatif Tipe Numbered Head Together dipadu Contextual Teaching and Learning Terhadap Hasil Belajar Siswa SMA Imanuel Palu Yulinda, Lika; Mustapa, Kasmudin; Ratman, Ratman
Jurnal Akademika Kimia Vol 7, No 2 (2018)
Publisher : Universitas Tadulako

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Abstract

This study aim was to determine the influence of application of cooperative learning model type numbered head together combination with contextual teaching and learning toward learning outcomes of students in SMA Imanuel Palu. This study used quasi experimental design with non randomized pretest-posttest control group. Sample used were two classes, Xb (n=30) as experimental and Xa (n = 30) as control one. The test of student learning outcomes data used the t-test statistical analysis of the two parties. The results of data analysis obtained, the average score of experimental class () was 50.50 with a standard deviation of 9.79 and for control class () was 41.03 with a standard deviation of 11.01. The result of testing hypothesis with the statistical t-test of two parties obtained that –ttable < tcalculation > +ttable (tcalculation = 2.35 and ttable = 2.00) with a significance level α= 0.05 and 58 degrees of freedom, then H0 was rejected and Ha was accepted. The result of the data analysis showed that there was any in learning outcomes between students in experimental class and the control class, until concluded there is any influences of application of cooperative learning model type numbered head together combination with contextual teaching and learning toward learning outcomes of students in SMA Imanuel Palu.

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