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JKPK (Jurnal Kimia dan Pendidikan Kimia)
Published by Universitas Sebelas Maret
ISSN : 25034146     EISSN : 25034154     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry
The JKPK (Jurnal Kimia dan Pendidikan Kimia) is a national journal, published three times a year in April, August, and December, containing research articles on Chemistry and Chemistry education.
Arjuna Subject : -
Articles 255 Documents
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Impact of Forest Fires in Sumatra and Kalimantan to Atmospheric Pollution During Period Of 2010-2015 Dessy Gusnita
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 6, No 1 (2021): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v6i1.35027

Abstract

contribute significantly. Pollutant emissions caused by forest fires comprising CO, SO2 and dust (PM10). This paper will be analyzed estimates of pollutant emissions in both Kalimantan and Sumatra using the estimation method based on the amount of material burned. Estimates of the emissions and dispersion of pollutants such as particulates, sulfur dioxide, carbon monoxide were investigated. Distribution and concentration of pollutants used time series of monthly data and spatial map based on satellite data. Extensive data from the 2010-2014 forest fires data from the ministry of the environment and forestry (KLHK) and forest fire data period 2015 from LAPAN. Pollutant concentration data used AIRS on satellite data, OMI satellite and MERRA during 2010-2011 and in 2014-2015, adjusted to the data in situ vast wildfires for both regions. The results of estimation of pollutant emissions in Sumatra shows emissions from forest fires for the period of 2010 greater than in 2011, reaching 9 tons of CO per year, while emissions from fires and plantations during 2011 were higher than in 2010 with a very high value of 150 Tons/year for pollutants CO. In Kalimantan, emissions from forest fires during 2010-2011 CO emissions highest in West Kalimantan 11.13 tons/year and South Kalimantan 12.14 tons of CO per year. Emissions from fires and plantations in South Kalimantan reached 32.11 tons/year.  
Carbon Ink Characterization from Banana and Cassava Peels by Carbonization Method Siti Fatimah; Nimas Mustika; Suci Pratiwi
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 5, No 2 (2020): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v5i2.33386

Abstract

Banana and cassava plants are the most growing plants in the world. The use of both plant's peel is usually for animal feed. This research is intended to utilize banana and cassava peel as a raw material of whiteboard ink markers by varying concentration of the carbons to see its effect on the characteristics of the ink.  The carbon concentration variations are 25 g, 30 g, 35 g, 40 g, and 45 g, which is dissolved in 100 ml of the solution. The steps of this research include the carbonization of banana or cassava peel, and then its carbon powder is sifted by 200 mesh. The powder will be dissolved in 50 ml of Arabic gum 10%, 15 ml of PEG-7, and 35 ml of alcohol 70%, then the solution stirred until homogeneous. The result showed that the addition of the Banana or cassava peels carbon concentration effect on the value of density, viscosity, pH, and pigment ink. The characteristic whiteboard ink markers from the banana peel that accordance with the commercial ink. It is consists of 30% Banana peel carbon concentration with a density value of 1.0077 g/cm3, viscosity value of 6.2049 cP, pH value of 10.55, and the ink pigment are close enough with the commercial refill ink. While the characteristic from cassava consists of 35% cassava peel carbon concentration with a density value of 1.0893 g/cm3, viscosity value of 15,2427 cP, pH value of 8,75, and the ink pigment are close enough with the commercial ink
Hydroxiapatite (HAp) Bioceramics Made from The Caletaiya presclupta Snail Shells from Poso Lake Agung Rimayanto Gintu; Elisabeth Betty Elok Kristiani; Yohanes Martono
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 5, No 3 (2020): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v5i3.45983

Abstract

Bioceramic Hydroxyapatite (HAp) was a derivated chemical synthetic compound from calcium phosphate commonly used to care for hard tissue damage. Bioceramic Hydroxyapatite can be synthesized from the compounds rich with calcium contains. This study treated the synthesis and physicochemical Characterization of the HAp made from Celetaiya persclupta snail shells obtained from Poso lake. From the characterization of the sample C. presclupta shells obtained the water contains 0.50±0.00%; ash contains 0.9913±0.0017g/g; potassium 0.0005±0.00007g/g; calcium 0.0391±0.0059g/g; phosphate 0.0221±0.0009g/g; phosphorus 0.0111±0.0005  and the ratio of  Ca/P 1.7382±0.1994%. The synthesis of HAp by base precipitation method showed the yield of synthesis 85.2891±4.2496% with the level of material reduction during synthesis 18.0442±1.1684%. The result of characterization of the HAp showed that the potassium contains 0.0002±0.00003g/g; calcium 0.0121±0.0031g/g; phosphate 0.0167±0.0013g/g; phosphorus 0.0084±0.0007g/g; ratio of Ca/P 1.3724±0.2736%; porosity 9.9929±0.7626%; swelling ability 24.8416±1.4989%; and biodegradability 10.8958±1.1781%. The overall results concluded that the C. presclupta snail shells could become a source of Bioceramic Hydroxyapatite (HAp). 
Virtual Practicum Guideline Development Based on 5E Learning Cycle Dewi Handayani; Salastri Rohiat; Muzanip Alperi; Isnaini Safitri
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 6, No 1 (2021): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v6i1.46744

Abstract

The research purpose was to develop chemistry practicum guidelines based on the 5 E (Engagement, Exploration, Explanation, Elaboration, Evaluation) learning cycle and determine the student's responses. This development research adapted from Borg and Gall model. Data were obtained from interviews, validation questionnaires from content and media experts, readability questionnaires, and student's responses after used the product. Results validation of the chemistry practicum guidelines shows that the content expert validation scores 4.42 while media expert validation scores 4.65 with a range> 4.2, classified as very good. The average readability test showed a score of 4.28. A product trial to determine the student's response toward developed guidelines had an average of 4.28, which was included in an exciting classification. There was an increase in student learning outcomes with average pretest scores of 50, average posttest scores of 85, and the N-gain value data obtained was 0,7 in the high category. Thus, the study concluded that the chemistry learning guidelines with salt hydrolysis topic based on the 5E learning cycle using the virtual program developed in this study were feasible to be applied in the learning process.
The Comparison of Spectrophotometric and TLC-Densitometric for DPPH Radical Scavenging Activity Analysis of Three Medicinal Plant Extracts Bambang Cahyono; Christina Setyadewi M.; M. Suzery; Agustina L. N. Aminin
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 5, No 2 (2020): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v5i2.40370

Abstract

In this research, Thin Layer Chromatography-Densitometry has proven to be a good method for analyzing 1, 1 diphenyl 2-picrylhydrazyl (DPPH) radical scavenging activity, since this approach displayed the similar trends with UV-Vis spectrophotometric method. Three medicinal plants collected from Semarang used to evaluate both methods.  The IC50 value ranged from 25.26 - 4913.74 ppm shown by UV-Vis spectrophotometric and 24.74 – 4674.61 ppm using TLC-Densitometric. Meniran Dechlorophyllated (Phyllanthus niruri) provides the strongest antioxidant activity and the weakest de-chlorophylated parsley (Petroselinum crispum). The paired sample t-test points from a non-dechlorophylation extract using the TLC densitometry test significantly gives a lower IC50 value than the UV spectrophotometry method-has. The maximum increase of peak area under the UV light 365 nm up to 56.08 %. This evidence supports the presumption that the scavenging radical DPPH caused not only decreasing the maximum absorbance under UV light 516 nm but also increasing the absorbance under UV light ± 365 nm.
Table of Contents volume 5 Number 2 Vol 5. no 2, Tabel of Contents
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 5, No 2 (2020): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v5i2.44427

Abstract

Molecular Docking Study of Nutmeg (Myristica Fragrans) Constituents as Anti-Skin Cancer Agents Fitriani, Ika Nur; Ansory, Hery Muhamad
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 6, No 1 (2021): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v6i1.47223

Abstract

Molecular docking analysis was carried out to understand better the interaction between DHODH and inhibitor from nutmeg in this series. The nutmeg constituent binding orientations in the active site of DHODH was seen in a molecular docking analysis and helped design a potentially new inhibitor. This work aimed to study the molecular docking of nutmeg constituents with the DHODH inhibitor using a computer-aided drug design. Molecular docking using AutoDock 4.2 was done to explore the models of binding complexes. The 3D structure was derived using Discovery Studio to investigate the essential chemical interaction of complex structures. Dihydroguaiaretic acid was the most potent ligand having a docking score of -9.3 kcal/mol. This value was better than the standard drug 5-FU. The dihydroguaiaretic acid structure interacted with Tyr365 and Thr63 through a hydrogen bond similar to the native ligand. These results suggest that nutmeg seed could serve as the lead compound for potent DHODH inhibitors against skin.
Cytotoxic Activity Against L1210 Leukemia Cells from the Ethyl Acetate Fraction of Kenikir Leaves (Cosmos. Caudatus) Preserved by Gamma Irradiation Susanto Susanto; Ermin Katrin Winarno; Hendig Winarno
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 5, No 3 (2020): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v5i3.46544

Abstract

Kenikir leaves (Cosmos caudatus) Has been used as traditional medicine, especially as an anti-cancer, this plant has been in Indonesia both in herbs and capsules. Microbial contamination of herbal medicinal raw materials occurs when the storage process is done. One of the preservation techniques used in the industry is using gamma irradiation techniques to reduce microbial and fungal contamination. The purpose of this research was to study the effect of gamma irradiation for the preservation of kenikir leaves (C. caudatus) as an anti-cancer based on cytotoxic activity using L1210 leukaemia cells. The simplicia was gamma-irradiated by Co-60 source with variation doses of 0 (control); 5; 7.5; 10; and 15 kGy. Then the irradiated and control samples were macerated successively using n-hexane, ethyl acetate, and ethanol. The active extract (ethyl acetate) was further fractionated using column chromatography, obtained seven fractions (F1 - F7). The seven fractions' cytotoxic activity against L1210 leukaemia cells showed that fraction 3 (F3) was the most active fraction with an IC50 of 1.26 µg/mL. Each dose's F3 cytotoxic activity showed that the IC50 7.5 kGy irradiation sample did not change significantly with control (0 kGy) based on ANOVA analysis using SPSS 24 with a 95% confidence level. In comparison, irradiation samples of 10 and 15 kGy showed a change in the IC50 value is significant with the control (0 kGy). These results indicate that gamma irradiation can be used as an alternative for preserving C. caudatus with a maximum dose of 7.5 kGy, so that its anti-cancer properties do not change with those without irradiation.
Binahong Leaves Water Extract (Anredera cordifolia (Tenore) Steen.) as a Natural Foaming and Antibacterial Agent of Antiseptic Liquid Bath Soap Widiastuti Agustina Eko Setyowati; Reti Prabaraita Nurisah; Puput Istika Wulandari
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 5, No 2 (2020): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v5i2.29892

Abstract

The research about the use of binahong leaves water extract (Anredera cordifolia (Tenore) Steen.) as a natural foaming and antibacterial agent in the production of antiseptic liquid bath soap has been conducted. The extraction of binahong leaves was done by the maceration method using water solvents, and then saponin identification was carried out using a foam test and Lieberman Burchard. Antiseptic liquid soap is made in 6 preparations with variations in the ratio of Sodium Lauryl Sulfate (SLS) and water extract of binahong leaves. Antibacterial activity test was carried out on Staphylococcus aureus and Escherichia coli using the excellent diffusion method. The results showed that binahong leaf water extract contained saponins and produced a stable foam of more than 10 minutes so that it could be used as a natural foaming agent in the production of antiseptic liquid bath soap. The soap produced meets the quality requirements of SNI 06-4085-1996 concerning Liquid Bath Soap, where preparation 4 has the best results with detergency power of 40%; pH 8,87; free alkali content of 0,04%; and a specific gravity of 1,06 gr/ml. A liquid bath soap with binahong leaves water extract surfactant (preparation 6) has the highest antibacterial activity against S. aureus and E. coli with inhibition area diameter of 13,5 mm (strong) and 12,5 mm (strong) respectively.
Misconception Profile of High School Student on Electrolyte and Non-Electrolyte Solution Using Pictorial-Based Two-Tier Multiple Choices Diagnostic Test Nahadi Nahadi; Wiwi Siswaningsih; Hanifah Kurnia M
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 5, No 3 (2020): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v5i3.46739

Abstract

The development and study had been done to determine misconceptions profile of class X high school students in Kuningan West Java on electrolyte and non-electrolyte solutions using descriptive methods. The instrument used was a pictorial-based two-tier multiple choices diagnostic test consisted 18 questions. The instrument had been tested for its feasibility with the CVR and CVI values was one, and the Cronbach's Alpha (reliability) value for the whole item was 0.706. The items were applied to class X students in schools with high, medium and low category. Based on the results of the application, the most common misconceptions of students on electrolyte and non-electrolyte solutions was that when dissolved in water, ionic compounds would be ionized into ions, oxygen atom in water molecule interacted with anions and hydrogen atoms in water molecule interacted with cations (37.78%). The misconceptions of class X high school students on electrolyte and non-electrolyte solution in high and low category schools in  Kuningan had a significant difference. Based on the one-way ANAVA test, the significance level < 0.05, there was 0.045. The misconception of class X high school students in Kuningan on electrolyte and non-electrolyte solutions based on gender differences did not have a significant difference. Based on results of t test, the significance level > 0.05, there was 0.755.

Page 13 of 26 | Total Record : 255

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