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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 240 Documents
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Pengaruh Model Pembelajaran Problem Based Learning pada Materi Hukum-Hukum Dasar Kimia terhadap Hasil Belajar Siswa Kelas X MAN 2 Model Palu Lamalat, Tri Sulistiyawati; Supriadi, Supriadi; Nuryanti, Siti
Jurnal Akademika Kimia Vol 7, No 3 (2018)
Publisher : Universitas Tadulako

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Abstract

Research on the effect of the problem-based learning model in the basic laws of chemistry on student’s learning outcomes in class X MAN 2 Model Palu has been done. This study aimed to determine the effect of the application of the problem-based learning model in the basic laws of chemistry on student’s learning outcomes in class X MAN 2 Model Palu. The type of research was a quasi-experimental study non-randomized design with pretest-posttest control group design. The sample was conducted with a purposive sampling technique. The study sample was students in class X MIA 6 as an experimental group (n = 22) and students in class X MIA 3 as a control group (n = 22). The data testing of students' learning outcomes used a non-parametric statistical analysis, the analysis of Mann-Whitney U-Test. The research results indicated that the mean value of the experiment class was high compared to the control class, 22.61 >18.39. The statistical analysis obtained that sig. 2-tailed (0,032) ˂ 0.05 and Zcalculation (-2.149) ˂ Ztable (-1.96). The average value of the experiment class was 82.95 while the average value of the control class was 73.64. So it can be concluded that there is the effect of applying the problem-based learning model in the basic laws of chemistry on student’s learning outcomes. 
Analisis Kadar b-Karoten Buah Pisang Raja (Musa Paradisiacal L) dan Pisang Kepok (Musa Paradisiaca Forma Typica) dengan Metode Spektrofotometri UV-Vis Zarnila, Zarnila; Napitupulu, Mery; Jura, Minarni Rama
Jurnal Akademika Kimia Vol 7, No 4 (2018)
Publisher : Universitas Tadulako

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Abstract

Banana fruit is a fruit that contains many nutrients. One of that is b-carotene, b-carotene is a provitamin that plays an important role in the formation of vitamin A. This study aimed to determine the levels of β-carotene in raja and kepok bananas. This research used a qualitative and quantitative method, which is the qualitative method using TLC while the quantitative method using UV-Vis spectrophotometry. The TLC results obtained that Rf b-carotene comparison was 0.97 cm, Rf of banana raja extract was 0.96 cm and banana kepok extract was 0.97 cm. Based on the UV-Vis spectrophotometry result, b-carotene content of raja banana fruit was 0.222 mg/100 grams while the kepok banana fruit was 0.261 mg/100 grams, therefore the highest level was banana kepok.
Analisis Kadar Kafein dalam Kopi Bubuk Lokal yang Beredar di Kota Palu Suwiyarsa, I Nyoman; Nuryanti, Siti; Hamzah, Baharuddin
Jurnal Akademika Kimia Vol 7, No 4 (2018)
Publisher : Universitas Tadulako

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Abstract

Analysis of caffeine level in local coffee powder that circulates in Palu city have been done. The purpose of this study was to determine the level of caffeine in local coffee powder, which is engaged in several markets in the city of Palu. Levels of caffeine in the study will be compared with the standard caffeine content according to the SNI 01-3542-2004, i.e. 0.45-2% w/w. The method used for qualitative analysis was the thin layer chromatography and for quantitative analysis was using UV-Vis spectrophotometry. The results of qualitative analysis of six local coffee powders A, B, C, D, E, and F showed each a Rf value between 0.32 to 0.40. Levels of caffeine (per 1 g of coffee powder) quantitatively ranging from brand samples A to F were 0.83, 2.06, 1.60, 2.63, 1.29, and 1.72%, respectively, percent level of caffeine of six samples of local powdered coffee, samples A, C, E and F in terms of SNI 01-3542-2004 were between 0.45-2.00% (w/w), while sample B and sample D exceeds 2% were 2.06% and 2.63%.
Analysis of Potassium, Magnesium and Sodium Contents in Chayote (Sechium edule Sw.) from Sedoa, North Lore District, Poso Lage, Mersed Djein; Ningsih, Purnama; Sakung, Jamaluddin
Jurnal Akademika Kimia Vol 8, No 1 (2019)
Publisher : Universitas Tadulako

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Abstract

Chayote has minerals such as potassium, magnesium and sodium which are very beneficial for the human body. This study aimed to determine potassium (K), magnesium (Mg) and sodium (Na) in ripe and young chayote extracts as well as old and young chayote seeds extracts by using quantitative analysis method with atomic absorption spectrophotometry. Potassium, magnesium and sodium were analysed at a wavelength of 766.5 nm, 285.2 nm and 589 nm. The results showed that the potassium contents are 80.059 mg/100g in ripe chayote;  45.431 mg/100g in young chayote; 65.287 mg/100g in old chayote seed; and 73.014 mg/100g in young chayote seed. Sodium contents are 61.032 mg/100g in ripe chayote; 49.936 mg/100g in young chayote; 61.101 mg/100g in old chayote seed; and 71.621 mg/100g in young chayote seed. Additionally, magnesium contents are 47.327 mg/100g  in ripe chayote;  74.324 mg/100g in young chayote; 57.658 mg/100g in old chayote seed; and 58.529 mg/100g in young chayote seed.
Utilization of Chitosan as an Animal Feed Supplement and Its Effect on Fattening of Organic Rooste (Gallus domestica sp) Firdamayanti Firdamayanti; Suherman Suherman; Minarni Rama Jura
Jurnal Akademika Kimia Vol 8, No 1 (2019)
Publisher : Universitas Tadulako

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Abstract

Chitosan has functional groups of an amine group (-NH2) that acts as a coagulant dyestuff, a protein binder, and an amino acid; and a hydroxyl group (-OH). The present of these functional groups cause high chemical reactivity of chitosan. Chitosan can be used as a dietary supplement of rooster. This study aimed to determine the effect of chitosan as a dietary supplement on fattening rooster. Fattening rooster can be seen from an increase of weight per week. This study provided bran as much as 200 gr/animal/day, then the bran was added with chitosan solutions as each concentration. The results obtained for the chicken A which given bran with chitosan solution increased in body weight of 0.1 kg at the first week, while for the chicken given bran without chitosan increased in body weight of 0.1 kg at the third week. For the chicken B which given bran with chitosan increased in body weight of 0.1 kg at the first week, while for the chicken given bran without chitosan increased in body weight of 0.1 kg at the second week. Based on the data for ± 1 months of study obtained that good chitosan concentrations used in this study for the chicken A were at concentrations of 6% and 8% by increasing each of 0.5 kg, while for the chicken B was at a concentration of 6% by increasing of 0.6 kg.
PEMANFAATAN DAUN PALADO (Agave sp) DALAM PROSES PEMBUATAN VIRGIN COCONUT OIL (VCO) Nuryanti, Siti; Rahmawati, Sitti; U.B., Sitti Nadira
Jurnal Akademika Kimia Vol 2, No 2 (2013)
Publisher : Universitas Tadulako

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Abstract

VCO lately has been used in medical area especially as a medicine for diabetes mellitus, obesity, cholesterol, heart, osteoporosis and can be used to cure diseases that caused by microbial and fungal. VCO also acts as antibiotic because it contains lauric and oleic acid. The availability of VCO materials in Indonesia is abundant, therefore to be developed as a medicine substance, the process of VCO making should be without any chemical material and high heating. The aim of this research is the utilization of palado leaves in the making process of VCO as well as to determine its quality. The method used in this research is the preparation of palado leaves fiber sample, preparation of cream coconut milk with coconut, the making of VCO fermentative for 20 hours and quality test for the VCO made with extra palado leaves by using parameters of colour, smell, the acid number, peroxide number, water content, refractive index and specific gravity, as a comparison is a commercil VCO (Celebes brand). Data analysis used is descriptive qualitative. The research result shows that VCO made with extra palado leaves has clear colour, normal smell, savory taste, while its acid number is 0.4 mg/g, peroxide number is 1 meq/g, water content is 1%, refractive index is 1.44804 and density is 0.888 g/ml. On the other hand, VCO Celebes has clear colour, normal smell and savory taste, while its acid number is 0 mg/g, peroxide number is 0 meq/g, water content is 0%, refractive index is 1.44803 and density is 0.892 g/ml. The conclusion of this research is that the palado leaves can be used in the making process of VCO and the VCO produced is suitable to APCC standard.
Analysis of Iron (Fe) and Zinc (Zn) in Red Fruit (Pandanus conoideus De Vriese) Alizah, Nur; Walanda, Daud K; Hamzah, Baharuddin
Jurnal Akademika Kimia Vol 8, No 2 (2019)
Publisher : Universitas Tadulako

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Abstract

Red fruit plant (Pandanus conoideus De Vriese) is very potential for health. This is because the plant contains many nutrients, especially minerals that are needed for the human body. Iron and zinc are two micro-minerals that contained in red fruit, but the content data about those are not widely known. The aim  of this research was to determine iron and zinc content by atomic absorption spectrophotometric of red fruit from  Mattirowaslle Village, South Pamona Sub-district, Poso Regency, Central Sulawesi. The water content of the sample obtained was 52%, and the ash content was 13.8%. While the analysis of iron and zinc content at wavelength 248.30 nm (iron) and 213.90 nm (zinc) obtained were 1,339 mg/100g for iron and 0,397 mg/100g for zinc.
Utilization of Chitosan as an Animal Feed Supplement and Its Effect on Fattening of Indigenous Chicken Nur Hakiki; Suherman Suherman; Paulus H Abram
Jurnal Akademika Kimia Vol 8, No 2 (2019)
Publisher : Universitas Tadulako

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Abstract

Feeding types to chickens influence on the fattening speed. The purpose of this study is to determine the influence of chitosan in the mixture of chicken feed on fattening of indigenous chickens. This study applied chicken feed as a mixture of corn and chitosan in various concentration of 0%, 2%, 4%, 6%, 8%, and 10% it was given on the morning, afternoon and early evening. The results showed that the weight of chickens fed only with animal feed and without the addition of chitosan is smaller than that of chicken fed with the addition of chitosan. The use of chitosan in livestock feed influence on the chicken weight gain in 1 week by 0.1 kg.
Skrining Fitokimia dan Uji Efektivitas Tepung Biji Kelor (Moringa oleifera L.) dalam Menurunkan Kadar Kolesterol Total Darah Mencit Jantan Nurliana, Nurliana; Rahman, Nurdin; Ratman, Ratman
Jurnal Akademika Kimia Vol 7, No 3 (2018)
Publisher : Universitas Tadulako

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Abstract

The aim of the study was to determine phytochemical compounds levels in Moringa seeds and determine the effective dose of moringa seed flour in lowering total cholesterol blood levels of mice. Qualitative test of phytochemical compounds in moringa seed flour was done using specific reagents. The effect of moringa seed flour in lowering total cholesterol blood levels was performed in 18 male mice divided randomly into 6 groups, i.e P1 as the negative control group, P2 as the positive control group by giving simvastatin, P3 as the test group with a dose of 0.14 g/kg BW/day, P4 as the test group with a dose of 0.28 g/kg BW/day, P5 as the test group with a dose of 0.42 g/kg BW/day, and P6 as the test group with a dose of 0.56 g/kg BW/day. P1 to P6 were given propylthiouracilin conjunction with a suitable treatment of the group. Data were analyzed with One-way ANOVA and Duncan's post hoc tests at 95% significant level. Results showed that moringa seed flour contained positively of flavonoids and saponins. Results analysis of changes on the total cholesterol levels between groups with One-way ANOVA test showed a significant difference (p = 0.002), where Fcount value=7.476 > Ftable value=3.11. The group with the provision of 0.42 g/kg BB/day of moringa seed flour performed the most effective influence in lowering total cholesterol blood levels of male mice which amounted to 34.33 mg/dL or 18.66%.
Pengaruh Kombinasi dan Rasio Pelarut Terhadap Hasil Ekstraksi Minyak dari Serabut Kelapa Sawit Rozi, Fachrul; Abram, Paulus Hengky; Diah, Anang Wahid M.
Jurnal Akademika Kimia Vol 7, No 3 (2018)
Publisher : Universitas Tadulako

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Abstract

This study aimed to determine the combinations and ratios of appropriate solvents to obtain the optimal mass of palm oil. Extracting the oil from palm fibers was conducted using soxletation method. Extraction is a way to get oil in a high amount and good quality by using an appropriate solvent. The weight of oils obtained from the volume ratios variable of solvents at 100:0, 70:30, 50:50, 30:70, and 0:100 were 0.446 ± 0.063 g, 0.379 ± 0.022 g, 0.295 ± 0.012 g, 0.276 ± 0.045 g, and 0.183 ± 0.054 g, respectively. This study showed the combination of the types and ratios of solvents toward extraction of oil, and the optimal oil mass was produced from n-hexane solvent.

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