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Rahmat Eko Sanjaya
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Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Lambung Mangkurat, Jl. A. Yani KM 36, Banjarbaru 70714, South Kalimantan, Indonesia
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INDONESIA
Jurnal Ilmiah Berkala Sains dan Terapan Kimia
Published by Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Lambung Mangkurat
ISSN : 14111616     EISSN : 25498215     DOI : http://dx.doi.org/10.20527
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry
Jurnal Ilmiah Berkala Sains dan Terapan Kimia is a peer-reviewed and open-access scientific journal published by the Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Lambung Mangkurat. The journal publishes high-quality original research articles, review articles, and short communications in chemistry and applied chemical sciences. The journal welcomes manuscripts in the following areas: Organic Chemistry, Inorganic Chemistry, Physical Chemistry, Analytical Chemistry, Biochemistry, Environmental Chemistry, Natural Product Chemistry, Materials and Polymer Chemistry, Computational and Molecular Chemistry, Theoretical Chemistry, and Applied Chemistry. The journal is published biannually in January and July.
Arjuna Subject : Kimia(semua kategori) - Inorganic Chemistry
Articles 256 Documents
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Corrosion Inhibition Mechanism Based on Adsorption Isotherm Model From Water Extract of Merkubung (Macaranga gigantea) Bark Extract on Mild Steel in Sulfuric Acid Solution Diah Riski Gusti; Nelson Nelson; Intan Lestari; Putri Ramadhanti; Ria Gracia Sibarani
Jurnal Sains dan Terapan Kimia Vol 17, No 1 (2023)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v17i1.9150

Abstract

The phenolic chemicals found in water extract of Merkubung bark (WEMB) can be employed as corrosion inhibitors. The corrosion inhibition mechanism by WEMB can be studied using an adsorption isotherm model. The Langmuir adsorption isotherm model has an R2 value that was closest to 1 one compared to the Freundlich, Temkin, Florry Huggins, and Frumkin adsorption isotherm models, as shown by an analysis of the adsorption isotherm model. Due to the interaction between the WEMB and the steel surface, the adsorption isotherm model reveals that the inhibitor of WEMB on the surface coating of mild steel tends toward chemisorption.
Antioxidant and Antiproliferative Activities of Methanol Extract from Melaleuca cajuputi subsp. Cumingiana [Turcz.] Fruit Isnaini Isnaini; Rosinta Dewi Achmadiyah; Gelvia Awaeh; Husnul Khatimah; Alfi Yasmina
Jurnal Sains dan Terapan Kimia Vol 17, No 1 (2023)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v17i1.13055

Abstract

Melaleuca cajuputi subsp. Cumingiana [Turcz.] Barlow (M. cajuputi) is a plant that is easily found in Banjarmasin. M. cajuputi contains phytochemical compounds in the form of polyphenols including flavonoids, quinons, saponins, and alkaloids that are thought to have antioxidant and antiproliferation activities. The aim of this research was to find out analyze antioxidant and antiproliferation activity of M. cajuputi fruit methanol extract. The antioxidant activity was tested using the DPPH method. The activities were observed in IC50 and were measured using the UV-VIS spectrophotometer at a wavelength of 517 nm. To test the antiproliferation, true experimental with post-test was applied in this research.  Animal used in this study were 30 mature zebras (length > 2.5 cm) which were grouped into 4, namely the negative control group (DMSO 0.05%), the methanol extract group of M. cajuputi with concentrations of 18.5 ppm, 37 ppm and 74 ppm. The bound variable in this study was antiproliferation activity in the tail of an amputated fish. Data analysis was measured by one-way ANOVA and Post-Hoc Tukey HSD tests. Phytochemical results obtained the presence of phenol compounds, cuinons, flavonoids, alkaloids, saponins, tannins, steroids and terpenoids. Methanol extract of Melaleuca cajuputi subsp Cumingiana [Turcz.] Barlow fruit was at IC50 of 15.50 ppm (95% CI 8.31- 32.72).  The antiproliferation activity of zebrafish tails increased in the administration of fruit extract Melaleuca cajuputi subsp. Cumingiana [Turcz.] Barlow in consentration of 74 ppm (p<0.05), both on day 4 and day 8 of measurement when compared to negative controls. It can be concluded that methanol extract of Melaleuca cajuputi subsp Cumingiana [Turcz.] Barlow fruit has antiproliferative activity against the growth of amputated zebrafish tails.
ISOLATION PINOSTROBIN COMPOUND IN TEMU KUNCI (KAEMPFERIA PANDURATA ROXB) RHIZOME Nurul Indriani; Muhammad Eka Putra Ramandha
Jurnal Sains dan Terapan Kimia Vol 17, No 1 (2023)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v17i1.14362

Abstract

Isolation and identification of Pinostrobin compounds in Temu Kunci Rhizomes (Kaempferia pandurata Roxb) were conducted in this study. The isolation and identification methods used were extraction, crystallization & recrystallization, Thin Layer Chromatography, and (4) Infrared (IR) Testing. The extraction results were followed by crystallization and recrystallization processes. The recrystallization produced a yellow solid isolate. A Thin Layer Chromatography test was carried out to determine the purity of the isolate using the eluent Chloroform : n-hexane of 6:4, Chloroform : Ethylacetate of 7:3. A comparison of the Retention Factor (Rf), and the Rf value of the phinostrobin standard indicates that the positive test sample contained the Pinostrobin compound. The Infrared spectrum indicates that the sample belongs to the flavonol group. It is confirmed from the functional groups of the isolates that are compatible or identical to the functional groups in the pinostrobin compound.
Study of Formaldehyde Content in Different Types of Tofu Using Micro Scale Laboratory Based Visible Beam Spectrophotometry Atikah Atikah; Burhanuddin Ronggopuro
Jurnal Sains dan Terapan Kimia Vol 17, No 1 (2023)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v17i1.13948

Abstract

Microscale laboratory is an analytical technique that requires a little reagent and produces a little waste. One application of microscale laboratory is the analysis of formaldehyde content in tofu. Formaldehyde is one of the chemicals that is harmful to the body but is often misused as a food preservative in tofu. This study aims at determining the presence of formaldehyde in tofu using laboratory microscale-based Schiff reagents. The use of microscale laboratories is expected to reduce waste and support the implementation of green chemistry. The method used was a calibration curve using a series of standard solutions of 10 ppm, 15 ppm, 20 ppm, 25 ppm, and 30 ppm with scanning at a wavelength of 561 nm. In the qualitative test, all samples were reactive and showed a purplish red color. In the qualitative test, the highest formaldehyde content in the tofu sample was obtained in the white tofu 3 with a content of 99.7 ppm.
Adsorption of Organic Compounds in Leachate using Precipitated Calcium Carbonate (PCC) from Ale-Ale Shells Yulistya Vidyaning Maulidya
Jurnal Sains dan Terapan Kimia Vol 16, No 2 (2022)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v16i2.12136

Abstract

Leachate waste from piles of garbage in the landfill (TPA) has a high concentration of Chemical Oxygen Demand (COD). High COD concentrations can cause a decrease in dissolved oxygen concentrations in the waters. Simple leachate treatment is carried out using the adsorption method with adsorbents derived from food waste. This research used Precipitated Calcium Carbonate (PCC) adsorbent from ale-ale shells. This study aims to evaluate the effect of particle size and calcination temperature variations on PCC yield and analyze the adsorption ability of PCC adsorbents in reducing COD concentrations. In addition, PCC was characterized using an infrared spectrophotometer (FTIR) and an X-ray diffractometer (XRD). Determination of COD concentration was carried out by permanganometric titration. The optimum PCC yield of 57.75% was obtained from Ale-ale shells with a particle size of 40 mesh with a calcination temperature of 800°C. The functional groups in PCC are C-O at wave numbers 1403 cm-1, 873 cm-1, and 713 cm-1. XRD characterization showed the presence of a calcite phase with a high peak intensity at 2 = 29.38°. The adsorption of organic matter on leachate by PCC (4.5 g/50 mL) with a stirring speed of 200 rpm for 240 minutes reduced the COD concentration of leachate from 1131.28 mg/L to 456.94 mg/L with an adsorption efficiency of 59.61%.
PENGARUH FRAKSI BULBUS BAWANG DAYAK (Eleutherine palmifolia (L) Merr) TERHADAP AKTIVITAS DIURETIKA DAN PELURUH BATU GINJAL TIKUS PUTIH JANTAN Sutomo Sutomo
Jurnal Sains dan Terapan Kimia Vol 3, No 2 (2009)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v3i2.16869

Abstract

Telah dilakukan penelitian mengenai pengaruh fraksi bulbus bawang dayak (Eleutherine palmifolia (L) Merr) terhadap aktivitas diuretika dan peluruh batu ginjal tikus putih jantan. Tujuan penelitian ini adalah untuk mengetahui aktivitas diuretika dan peluruh batu ginjal fraksi bulbus bawang dayak terhadap tikus putih jantan yang diinduksi dengan hidroksiprolin   dengan dosis 2,5 g/kg BB. Hewan uji yang telah diinduksi selanjutnya diberi perlakuan dengan fraksi petroleum eter, etil asetat, dan n-butanol pada dosis 400 mg/kgBB. Parameter yang diidentifikasi meliputi karakteristik ginjal yaituwarna, bentuk, ukuran ginjal serta rasio bobot ginjal. Untuk analisis urin 24 jam meliputi pH, volume urin, dan kadar kalsium urin pada hari ke-1 dan ke-3. Pengujian dilakukan sebanyak lima replikasi. Analisis data menggunakan metode statistik Tukey dan Scheffe. Dari data yang diperoleh diketahuibahwa ada perbedaan yang  signifikan antara kelompok perlakuan dengan kelompok kontrol. Fraksi petroleum eter, fraksi etil asetat, dan fraksi n-butanol dosis 400 mg/kg BB dapat menurunkan kadar kalsium urin, meningkatkan volume air seni 24 jam, menurunkan pH air seni dan menurunkanrasio bobot ginjal/200 gram berat badan (p<0,05). Fraksi bulbus E. palmifolia (L) Merr memiliki aktivitas diuretika dan peluruh batu ginjal.
Characteristics and Chemical Composition of Fly Ash From Pulang Pisau’s Power Plant as A Potential Material for Synthesis of Aluminosilicate Materials Rendy Muhamad Iqbal; Akhmad Damsyik; Retno Agnestisia; Siswo Siswo
Jurnal Sains dan Terapan Kimia Vol 16, No 2 (2022)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v16i2.12191

Abstract

The Steam-Electric Power Station (PLTU) is one of the initiatives to meet the nation's current electricity requirements. The use of fuel for steam power plant is still dominated by fossil fuels such as coal. Even though domestic energy needs are met, steam power plant turns out to be a contributor to gas emissions that cause global warming, as well as a by-product in the form of fly ash which can cause environmental and ecosystem problems. Fly ash contains silica oxide (SiO2) and aluminum oxide (Al2O3) compounds which can be used as raw materials for synthesizing aluminosilicate-based materials such as geopolymers and zeolites. This study tested the characteristics and composition of chemical compounds in fly ash from Pulang Pisau’s power plant, Central Kalimantan. Characterization using X-Ray Diffraction (XRD) showed that peaks of quartz material dominated fly ash from Pulang Pisau’s power plant at 2θ=20.82°;26.61° and mullite minerals at 2θ= 31.2°;33.1°; 35.4°;39.2°;59.8°. The results of the chemical compound composition were tested using the ASTM-D3682-12 standard. Fly ash has a composition of 29.00% SiO2, 9.98% Al2O3, 13.75% Fe2O3, and 28.37% CaO. Fly ash from Pulang Pisau’s power plant is classified as type C fly ash, which can potentially be used as a source of aluminosilicate-based material synthesis.
Chemical Preliminary Evaluation of leaves, Peels, and Fleshs Fruit of Limau Kuit: Local Orange of South Kalimantan Azidi Irwan; Kamilia Mustikasari; Dahlena Ariyani
Jurnal Sains dan Terapan Kimia Vol 11, No 2 (2017)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v11i2.4040

Abstract

This research was conducted to know about fruit of limau kuit from South Kalimantan which includes weight, diemeter of fruit, volume of fruit juice, water content, and ash content of its flesh as well as water and ash content on leaves and fruit peel. Chemical preliminary examination includes measurement of pH of fruits juice and phytochemical screening test on leaves, fruit peel, and fruit flesh. The result is obtained with mean value as follows: weight 154,82 g, diameter of fruit 68,45 mm, volume of juice water 44,60 ml, water content of fruit flesh 67,16%, water content of fruit peel 65,67%, leaf water content 65,88%, ash content 0,72%, fruit ash content 1,39%, and leaf ash content 3,32%. Measurement of pH of fruit juice without dilution; 100x; 1000x; and 10000x dilutions showing a value of 1.62; 2.08; 2.68; and 3.33, respectively. The results of the phytochemical examination on fresh samples of leaves, fruit peels, and fruit juices showed all samples giving positive (+) test results against alkaloids, saponins, steroids, triterpenoids (except negative (-) for fruit skin samples), tannins, and flavonoids (except (-) for the juice of the fruit). While the samples with the fresh-dried treatment extracted each using ethanol and n-hexane solvents showed (+) results for all sample extracts in both fresh-dried treatments, except (-) saponins in dried leaves (ethanol extract) and fruit peels fresh (n-hexane extract). Tannin test for fresh leaf (n-hexane) and flavonoid for fresh leaves (ethanol extract) and fresh fruit peel (ethanol extract) showed negative results.Keywords: Limau kuit, South Kalimantan, chemical preliminary test, phytochemical test, ethanol extract, n-hexane extract.
Development of QSAR Model of Caffeic Acid Phenethyl Ester as Anti-Cancer HT-29 Uripto Trisno Santoso
Jurnal Sains dan Terapan Kimia Vol 16, No 2 (2022)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v16i2.12632

Abstract

Caffeic Acid Phenethyl Ester (CAPE) compounds are potentially colorectal anticancer drugs. QSAR (Quantitative Structure-Activity Relationship) research on the CAPE compound class has been carried out, but the model in the previous study did not meet the goodness of fit criteria. The development of the CAPE compound QSAR model as a colorectal anticancer was carried out to obtain a model that meets the goodness of fit criteria and is valid. Eighteen CAPE compounds were used to build the QSAR model using the Multiple Linear Regression (MLR) technique. The descriptor selection was carried out using the backward elimination method and the validation test using the internal leave one out (LOO) cross-validation. The results showed that the QSAR model with four descriptors, namely MDEC22, MDEC23, JGI1, and molecular weight (BM), met the goodness of fit and Q2(LOO) criteria. The development of the QSAR model by adding the LogP descriptor resulted in the QSAR 5 descriptor model with higher goodness of fit level than the QSAR model without the LogP descriptor. Both of these QSAR models have the potential to be used as predictors in the development of a new class of CAPE compounds as anticancer agents against HT-29 cells.
Characterization of Natural Face Toner from Rice-washed Water Tantra Diwa Larasati; Novy Pralisa Putri; Helda Niawanti; Linda Eka Pratiwi; Delthania Ekaristi Paulina Gedoan
Jurnal Sains dan Terapan Kimia Vol 16, No 2 (2022)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v16i2.10850

Abstract

Toner is a skin treatment that serves to refresh and clean facial skin. This study used rice-washed water as the main ingredient for producing toner. Rice-washed water is the main ingredient because it contains abundant nutrients such as carbohydrates in the form of starch, fat, protein, gluten, cellulose, hemicellulose, sugar, vitamins, and minerals. This study aims to determine the effect of toner application made from rice-washed water on the skin, storage time on toner quality, and the production process. The method used in this study uses a simple method of soaking with a rice/water with a various ratio (kg/L). The analysis results show that the toner has a pH of 6.4, considered safe for all skin types with good moisture. The effect on skin moisture was analyzed on six respondents. The toner has a viscosity that is not too thick with a cloudy white color caused by rice grains. Rice grains are beneficial for the skin because they can regenerate skin cells. Rice-washed water toner for seven days contains fat, manganese, protein, oil, fat, and is odorless.

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