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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 6, No 4 (2017)" : 10 Documents clear
Analisis Zat Gizi Makro Dari Tepung Kombinasi Kakao (Theobroma Cacao L) dan Ubi Kayu (Manihot Utilissima) Sebagai Bahan Dasar Biskuit Hairunnisa Hairunnisa; Suherman Suherman; Supriadi Supriadi
Jurnal Akademika Kimia Vol 6, No 4 (2017)
Publisher : Universitas Tadulako

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Abstract

This study aims to determine the moisture content, ash, carbohydrate, protein and fat from a combination of flour cocoa and cassava as a raw material manufacture of biscuits, as well as knowing the favorite test (favorite level) of the biscuits that have been made with several variations of flour cocoa and cassava. The method used is the gravimetric method, combustion method, phenol method, Kjeldahl method, and soxhlet method.The results showed that the combination of cocoa powder and cassava with some variation of that, variation A (25%:75%) had a moisture level of 18.0%, 2.2% ash, 2.7 mg/100gcarbohydrates, 1.7% protein, and 7.2% fat. Variation B (50%: 50%) had a moisture level of 4.0%, 3.4% ash, 63.9 mg/100 g carbohydrates, 4.8% protein, and 19.2% fat. Variation C (75%:25%) had a moisture level of 2.0%, 9.4% ash, 127.9 mg/100gcarbohydrates, 6.7% protein, and 27.4% fat. These results indicated that the levels of nutrients in the combination of cocoa and cassava flour increased with increasing variations, especially for ash, carbohydrates, protein, and fat levels with the addition of cocoa flour by 75% but the moisture level decreased, and the biscuit trials have shown that the best treatment was the Variation B (50%: 50%).
Ekstraksi Ion Merkuri MenggunakanTeknik Emulsi Membran Cair dengan Variasi Konsentrasi Benzoil Aseton dalam Fasa Membran dan Variasi pH Fasa Eksternal Sulniawati, Sulniawati; Hamzah, Baharuddin; Abram, Paulus Hengky
Jurnal Akademika Kimia Vol 6, No 4 (2017)
Publisher : Universitas Tadulako

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Abstract

Mercury ion extraction using the liquid membrane emulsion technique with the variation of benzoil aseton concentration in membrane phase and variation of pH of external phase has been done. The sample containing Hg2+ ions with a concentration of 20 mg/L. Variation of benzoil aseton were concentration of 0.01 M, 0.015 M, 0.02 M and 0.025 M, whereas variation of external phase pH used were 1,5; 2; 2,5; 3 and 3,5. The measurement of extraction was conducted by using UV-Vis spectrophotometer. The results showed that the largest percent extraction on the extraction of mercury ions in solution by using liquid membrane emulsion was at a concentration of benzoil aseton 0.02 M with the percentage of extraction 79.33% and the pH external phase 2 with the percentage of extraction 85.30%.
Penentuan Konsentrasi Efektif Ekstrak Tanaman Patikan Kebo (Euphorbia Hirta) Merah Dan Hijau Dalam Melarutkan Kalsium Hamdiana, Hamdiana; Jura, Minarni Rama; Ratman, Ratman
Jurnal Akademika Kimia Vol 6, No 4 (2017)
Publisher : Universitas Tadulako

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Abstract

The use of traditional materials is one alternative for the treatment of kidney stones. One of them is utilizing a plant of patikan kebo (Euphorbia hirta). This study is conducted by using laboratory experiments and the extract of the plant of patikan kebo red and patikan kebo green to dissolve the calcium phosphate as a substitute for kidney stones. The extraction of samples is conducted by decoction. The aim of the study is to determine the effective concentration of the extracts of patikan kebo red and green to dissolve calcium and test the effectiveness of the extracts of patikan kebo to dissolve calcium compared to Batugin elixir and distilled water. Determination of the concentration of dissolved calcium in the extracts using a flame photometer. The results show that the extract of patikan kebo red with a concentration of 2.1% is effective in dissolve the calcium with a concentration of 5.2 ppm. The extract of patikan kebo green with a concentration of 27.4% is effective in dissolving the calcium with a concentration of 27.5 ppm. When compared with Batugin elixir and distilled water, Batugin elixir can only dissolve the calcium with concentration 15.3 ppm, while distilled water can only dissolve 3 ppm of the calcium.
Pembuatan Etanol dari Buah Salak (Salacca zalacca) Melalui Proses Fermentasi Wartini, Ni Ketut; Abram, Paulus Hengky; Rahman, Nurdin
Jurnal Akademika Kimia Vol 6, No 4 (2017)
Publisher : Universitas Tadulako

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Abstract

The study aimed to determine the level of ethanol that produced by the flesh of salak fruits with the fermentation process. The method used was an experimental method. The technical is fermentation, with tape yeast starter, determination of ethanol and purification. Ethanol level in the flesh of fresh fruits without handling was 11.3%, the highest levels of ethanol in the fruit flesh of 4 days after the plucking was 7.6%, and the fruit flesh of 7 days after the plucking was 3.4%. 
Pengaruh Penerapan Model Pembelajaran Kooperatif Tipe Scramble Terhadap Hasil Belajar Siswa Pada Materi Hidrokarbon di Kelas X SMA Negeri 8 Palu Suliadi, Ilham; Said, Irwan; Jura, Minarni Rama
Jurnal Akademika Kimia Vol 6, No 4 (2017)
Publisher : Universitas Tadulako

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Abstract

This study aimed to obtain description in application the cooperative learning model type scramble on student’s learning outcomes in hydrocarbon material in class X SMAN 8 Palu. This type of research was quasi-experimental research. This study was conducted at two group, 27 students in class XB as an experimental group and 28 students in class XA as a control group. The testing of student’s learning outcomes data used the statistical analysis t-test of the two parties with the prerequisite test: normality test and homogeneity test. The results of the data analysis, it was obtained the average values of students in experiment class () was 72.40 with a standard deviation of 11.86 and students in control class () was 67 with a standard deviation of 12.03. Based on the results of testing hypotheses by statistical t-test two parties, it was obtained –ttable­<tcalculation> +ttable (tcalculation=2.37 and ttable=1.67)  with a significance level α = 0.05 and degrees of freedom 53, then H0 was rejected and ha was accepted. It can be concluded that there is the effect of applying the cooperative learning model type scramble toward student’s learning outcomes in the hydrocarbon material in class X SMA 8 Palu.
Analisis Tembaga (Cu) Dan Timbal (Pb) dalam Air Laut dan Sedimen di Perairan Pantai Loli Kecamatan Banawa Kabupaten Donggala Santi, Santi; Tiwow, Vanny M. A.; Gonggo, Siang Tandi
Jurnal Akademika Kimia Vol 6, No 4 (2017)
Publisher : Universitas Tadulako

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Abstract

This study aimed to determine the concentration of heavy Cu and Pb in seawater and sediment in coastal waters Loli subdistrict Banawa, district Donggala. The method used was destruction and using Atomic Absorption Spectrophotometer (AAS) instrument.Samples of seawater and sediment were taken by two sampling points. Samples were destructed by using a solution of HNO3 and HClO4with ratio 4: 1. Levels were measured at a wavelength of 325.7 nm for Cu and 217 nm for Pb. The analysis result obtained that the levels of Pb in the seawater in the range of 0,531-0.671 mg/L, while for Cu in the range of 0.009-0.090 mg/L it can be concluded that the levels of Pb and Cu in seawater has exceeded the levels were of 0,008 mg/L. For sediment samples obtained that Pb levels were around 1,78-7,73 mg/kg while for Cu 15.86-68.88 mg/kg so Cu in sediment was up to 30 mg/kg while the levels of Pb did not exceed the tolerance limits of 33 mg/kg.
Pemanfaatan Limbah Kulit Pisang Sebagai Pupuk Organik Cair dan Aplikasinya Terhadap Pertumbuhan Tanaman Kangkung Darat (Ipomea Reptans Poir) Manis, Ince; Supriadi, Supriadi; Said, Irwan
Jurnal Akademika Kimia Vol 6, No 4 (2017)
Publisher : Universitas Tadulako

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Abstract

Banana peel waste utilization as organic manure and its application has been made to the land kale plant growth (Ipomea reptans Poir). This paper aims to describe how to manufacture liquid organic fertilizer from the waste banana skin, determine the total nitrogen content of liquid organic fertilizer and the effect of liquid organic fertilizer waste banana skin on plant growth kale land (Ipomea reptans Poir). The method used was experimental at the stage of making a liquid organic fertilizer waste banana peel in fermentation, the determination of total nitrogen content and the application of the organic liquid fertilizer waste banana skin using a randomized block design (RBD) with 4 treatments include P0 (0 mL); P1 (20 mL); P2 (40 mL); and P3 (60 mL).The parameters measured were plant height (cm), the number of leaves (leaf) and wet weight (g). The growth data of the swamp cabbage land (Ipomea reptans poir) were analyzed by using the statistical test analysis of variance (ANOVA) then followed by Duncan test with significance level of 5%. The results showed that levels of total nitrogen of the organic liquid fertilizer waste was 0.032% and the application of the organic liquid fertilizer of banana peel waste on the growth of swamp cabbange land (Ipomea reptans poir) influence on plant height (cm) and wet weight (g) but have no effect on the number of leaves (leaf). Treatment P2 (40 mL) showed the best result for the average plant height (cm), the number of leaves (leaf) and wet weight (g) of the swamp cabbage land (Ipomea reptans poir).
Digesti Logam Zink(Zn) Dalam Sedimen Estuaria Sungai Palu Dengan Kombinasi Asam Mineral Galib, Stefhanny; Said, Irwan; Napitupulu, Mery
Jurnal Akademika Kimia Vol 6, No 4 (2017)
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Abstract

The research was conducted to determine the digestion power is highest of Zn metal with the combination of mineral acids in the estuarine sediments of Palu River samples. Zn metal concentrations in the sediments were analysed by Atomic Absorption Spectroscopy (AAS) at a wavelength of 231.9 nm. The results showed that water content ranged between 30.36%-37.18%, ash content ranged from 52.40%-68.76%, and biomass content ranged from 0.88%-10.42%. Analysis of AAS showed the significant average of Zn metal on a combination of mineral acids HNO3-H2SO(1:1) was 289.95182.49 mg/kg, and on a combination of mineral acids HNO3-HCl (1:3) was 669.18447.2 mg/kg. While calculation results of the relative standard deviation values were 25.35% for the combination of mineral acids HNO3-H2SO4 (1:1), and 22% for the combination of mineral acids HNO3-HCl (1:3). The combination of mineral acids having the highest digestion to the Zn metal in the estuarine sediments of Palu River was a combination of mineral acids HNO3-HCl (1:3).
Analisis Kadar Flavonoid dan Fenolat pada Kulit Buah Manggis (Garcininia mangostanaL.) Rezki, Atika Putri; Gonggo, Siang Tandi; Sabang, Sri Mulyani
Jurnal Akademika Kimia Vol 6, No 4 (2017)
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Abstract

This study aimed to determine flavonoid and phenolic levels from the mangosteen bark samples. The preparation process of the sample was performed by extraction through maceration technique using HCl 1% in ethanol and for the phenolic using ethanol. Levels of both analit were determined using a UV-Vis spectrophotometer at the wavelength of 510 nm and 700 nm for the flavonoid, and 765 nm for the phenol. The results showed that flavonoids and phenol levels in the mangosteen bark samples were 1.271 mg/g and 12.373 mg/g.
Pengaruh Pembelajaran Self Direct Learning Berbasis Teknologi Informasi Terhadap Hasil Belajar Siswa Pada Materi Struktur Atom di Kelas X SMA Negeri 9 Palu Ering, Novita Septiani; Mustapa, Kasmudin; Jura, Minarni Rama
Jurnal Akademika Kimia Vol 6, No 4 (2017)
Publisher : Universitas Tadulako

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Abstract

The aim of this study was to investigate the effect of self-direct learning based on information technology toward learning outcomes of students in the structure of atoms material in class X SMA 9 Palu. The population in this study was students of class X academic year 2016/2017. The samples were students (n=26) in the class XA as an experimental class (learning by direct self learning) and students (n=25) in class XC as the control class (learning by the conventional method).The data collection was done using an instrument of test results of studying chemistry at the structure of atoms material is valid. The data testing were using t-test statistical analysis of the two parties with the prerequisite test, the normality and homogeneity test. The data analysis results obtained that an average score of the experimental class = 71.04 and for the control class gained an average = 64.80. Based on the statistical hypothesis testing of test two parties obtained that value tcalculation= 6,50and ttable= 2,00ata = 0,05. In this case, H1was accepted and H0 was rejected because tcalculation was in the rejection area of H0.This shows that there was an effect on differences in learning outcomes of students that were taught by self-direct learning and by the conventional method in the structure of atoms material in class X SMA 9 Palu.

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