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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 1 (2018)" : 10 Documents clear
Analisis Vitamin C dan Protein pada Biji Buah Labu Siam (Sechium edule) Fadliya, Fadliya; Supriadi, Supriadi; Diah, Anang Wahid M.
Jurnal Akademika Kimia Vol 7, No 1 (2018)
Publisher : Universitas Tadulako

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Abstract

Chayote seeds are found in the middle of the fruit which have flat structures and white. Those seeds has never been used. This study aimed to determine the levels of vitamin C and protein in old chayote fruit seeds. The vitamin C were analyzed using a UV-Vis spectrophotometer, while the protein were analyzed using the Kjeldahl method. Results showed that level of the vitamin C in old fruit seeds was by 0.56%, while the protein level obtained was by 0.81%. This study concluded that old chayote fruit seeds contained protein and vitamin C that can be used as a source of antioxidants and source of beneficial nutrition.
Analisis Kadar Kalium (K) dan Posforus (P) Pada Limbah Kangkung Darat (Ipomea reptans Poir) Setianingsih, Rahmadiana; Nuryanti, Siti; Ratman, Ratman
Jurnal Akademika Kimia Vol 7, No 1 (2018)
Publisher : Universitas Tadulako

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Abstract

This research is aimed to determine potassium (K) and phosphorus (P) levels in the waste of swamp cabbage. The Spectrodirect instrument was used to analyze the levels of potassium and phosphorus in the waste of swamp cabbage. Based on analysis of the levels of potassium and phosphorus in the waste of swam cabbage, it was obtained that the average value of K concentration in the sample was 5.51213 mg/kg. On the other hand, the average value of P concentration in the sample was 43.19503 mg/kg. From the result of this analysis, it also demonstrated that the concentration of phosphorus was higher than the concentration of potassium.
Efek Ekstrak Daun Alpukat (Persea americana Mill.) dalam Menurunkan Kadar Kolesterol Darah pada Mencit (Mus Musculus) Mufida, Mufida; Rahman, Nurdin; Supriadi, Supriadi
Jurnal Akademika Kimia Vol 7, No 1 (2018)
Publisher : Universitas Tadulako

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Abstract

This study aimed to determine the effective concentration of avocado leaves extract in lowering cholesterol blood levels in mice (Mus musculus). The animals test were 15 male mice and were induced with propylthiouracil and high-fat dietary food. Mice were divided randomly into 5 groups with different treatments. Treatments I, II and III were given avocado leaves extracts each with a concentration of 10, 20, and 40%, respectively. Treatment IV was given simvastatin suspension as a positive control, and treatment V was given (Na-CMC) 1% as a negative control. Data were analyzed statistically with analysis of variance (ANOVA) test followed by Duncan test. The results showed that avocado leaves extract contained positively of alkaloids, flavonoids, saponins, tannins, and triterpenoid or steroids. Avocado leaves extract lowered cholesterol blood levels in mice with the most effective concentration was 10% (w/v).
Pengaruh Penerapan Model Pembelajaran Kooperatif Tipe Teams Games Tournament Berbasis Scramble terhadap Motivasi dan Hasil Belajar Siswa SMA Kristen GPID Palu Mbosisi, Sifra Bertin; Mustapa, Kasmudin; Ratman, Ratman
Jurnal Akademika Kimia Vol 7, No 1 (2018)
Publisher : Universitas Tadulako

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Abstract

This study aimed to determine the effect of the cooperative learning model type teams scramble tournament games based scramble on motivation and learning outcomes students SMA Kristen GPID Palu. The population in this study were all students of class X. The research sample was students (n = 25) of class Xa as a control class and students (n= 24) of class Xb as an experiment class. The testing of student’s learning outcomes data was using the statistical analysis t-test of the two parties and the testing of student’s' motivation using the questionnaire data used a descriptive analysis. The average score of student’s learning outcomes of the experiment class (X1) was 52.83 with a standard deviation of 11.97 and the control class (X2) was 48.12 with a standard deviation of 11.37. Based on the statistical analysis of the hypothesis by t-test two parties, it was obtained that –ttable ≤ tcalculation ³ +ttable (tcalculation = 2.09 and ttable = 2.02) with a significance level a = 0.05 and degrees of freedom = 47, then H0 was rejected and Ha was accepted, therefore it can be said that there is a difference in student’s learning outcomes using cooperative learning model type teams tournament games based scramble. The results of the data analysis of student motivation indicated that the percentage value for the experimental class was 83.4% and for the control class was 81.21% and both were on the agrees attitude with the positive category, so it can be concluded that there is an influence of the cooperative learning model type teams scramble tournament games based scramble on motivation and learning outcomes of students SMA Kristen GPID Palu.
Analisis Bioetanol dari Limbah Kulit Buah Sukun (Artocarpus altilis) dengan Cara Hidrolisis dan Fermentasi Fardiana, Fardiana; Ningsih, Purnama; Mustapa, Kasmudin
Jurnal Akademika Kimia Vol 7, No 1 (2018)
Publisher : Universitas Tadulako

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Abstract

This study aimed to determine glucose and ethanol levels from fermentation of peel waste of breadfruit. Glucose level was determined using UV-Vis spectrophotometer and then continued with fermentation of glucose from hydrolysis process using yeast tape (saccharomyces cerevisiae) for 3 days to produce bioethanol. The step in this study was the sample preparation, the acid variations in hydrolysis with HCl, H2SO4, H3PO4 (10%) and the fermentation. Determination of ethanol from the fermentation of glucose was measured by using alkoholmeter. The highest glucose level was 0.68% which was from hydrolysis using HCl and the highest ethanol level was 9% which obtained from the fermentation of glucose by using HCl hydrolysis. The conclusion shows that the type of acid used to reach optimum hydrolysis of the breadfruit’s peel is HCl.
Pemanfaatan Kunyit (Curcuma domestica Val) Untuk Memurnikan Minyak Jelantah Muhammad Silmi Hi Abubakar; Siti Nuryanti; Suherman Suherman
Jurnal Akademika Kimia Vol 7, No 1 (2018)
Publisher : Universitas Tadulako

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Abstract

Study on the purification and quality test of used cooking oil with turmeric has been done. This study aims to determine the quality of cooking oil after purified turmeric. The quality parameters of oil studied were the moisture content, free fatty acids (FFA), and peroxide. The methods used for determination of these parameters were gravimetry for moisture content, acid-base titration for free fatty acids, and iodometric for peroxide. The test results for water from 0.6% to 0.4% free fatty acid from 1.2% to 0.2%, and peroxide levels before and after purification were successively from and 6 meq/g to 4 meq/g, respectively. Only free fatty acids of all three parameters met the requirement of SNI.
Penerapan Model Pembelajaran Kooperatif Tipe Make a Match untuk Meningkatkan Hasil Belajar Siswa pada Materi Larutan Elektrolit dan Non Elekrolit di Kelas X Madrasah Aliya DDI Lonja Muslimah, Muslimah; Mustapa, Kasmudin; Ratman, Ratman
Jurnal Akademika Kimia Vol 7, No 1 (2018)
Publisher : Universitas Tadulako

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Abstract

This research describes the differences of student’s learning with the application of cooperative learning type make a match in the electrolyte and non-electrolyte at the X grade student’s of the Madrasah Aliya DDI Lonja. This research used quasi experimental with non randomized pretest-posttest control group design. This research was conducted with two groups: XA as the experimental (n=21) XB as the control group (n=18). The data findings means score of experimental group (X1) is 70,5 with the standard deviation 9,6 and the control group (X2) is 62.0 with the standard deviation is 6. Based on the results, the researcher concludes cooperative learning type make a match has better than control class that used conventional learning model.
Analisis Sulfur (S) dan Besi (Fe) pada Limbah Cair Panas Pembangkit Listrik Tenaga Uap (PLTU) Di Kelurahan Panau Kecamatan Palu Utara Madjid, Nurhidayah Abd.; Napitupulu, Mery; Said, Irwan
Jurnal Akademika Kimia Vol 7, No 1 (2018)
Publisher : Universitas Tadulako

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Abstract

This research aims to find the levels of sulfur and iron in the liquid waste heat of PLTU discarded into bodies of water at Panau village Subdistrict north of Palu. This research used spectrodirect for the analysis. The result of the research showed that the waste not contents the sulfur or iron, but contents the sulfite. Based on measurements using wavelengths of 405 nm was found that the sample contains 3.12 mg/L sulfite compounds.
Penerapan Model Pembelajaran Problem Based Learning (PBL) terhadap Hasil Belajar Siswa SMAN 7 Palu Kelas XI pada Materi Larutan Penyangga Beddu, Amsar T.; Sabang, Sri Mulyani; Ningsih, Purnama
Jurnal Akademika Kimia Vol 7, No 1 (2018)
Publisher : Universitas Tadulako

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Abstract

This research aims to investigate the result of a study in applying the model of problem-based learning (PBL) the students of SMAN 7 Palu on the topic buffer. This method use quasy experiment with pretest-posttest control group design. The population is a class XI students of SMAN 7 Palu, where the sample is a 23 students in class XI IPA 3 as the experimental group and 23 students in class XI IPA 4 as the control group, which is determined by purposive sampling. The result of student learning to the average value of the experimental class is bigger than for class control experiment was 82.61 and for the control, class is 8.65. Test normality using the Kolmogorov-Smirnov test values obtained for the experimental class Sig 0.20 > 0.05 and class control 0.20 > 0.05, it means that both at data are normally distributed. Homogeneity test using the test statistics Lavene which gained value of Fhitung 0.37 > 0.54 Ftabel for experimental classes.200 Sig > 0.05 and for grade control 0.20 > 0.05, it means that both of normally distributed data, there is similarities variant between a group or the means homogeneous. Testing hypothesis use t-test two parties where the significance value of 0.06, it means at the value of Sig > 0.05, that Ho rejected and Ha accepted. Based on the statistical test, PBL learning model on material buffer has a positive influence on results for students at SMAN 7 Palu
Analisis Kadar Flavonoid pada Batang Jarak Pagar (Jatropha curcas L.), Jarak Merah (Jatropha gossypifolia L.), dan Jarak Kepyar (Ricinus communis L.) Kesumasari, Ni Made; Napitupulu, Mery; Jura, Minarni Rama
Jurnal Akademika Kimia Vol 7, No 1 (2018)
Publisher : Universitas Tadulako

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Abstract

This study aimed to determine flavonoids levels contained in each of jatropha plant samples to be used as an alternative affordable free radicals deterrent. The flavonoid content was analyzed using UV-Vis spectrophotometry. Stem of the three samples was extracted using HCl. The results showed that total flavonoids levels contained in each stem of Jatropha curcas L., Jatropha gossypifolia L., and Ricinus communis L. were 3.959 mg/L, 1.309 mg/L, and 0.083 mg/L, respectively.

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