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Jurnal Ilmiah Berkala: Sains dan Terapan Kimia
Published by Universitas Lambung Mangkurat
ISSN : 14111616     EISSN : 25498215     DOI : http://dx.doi.org/10.20527
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry
Sains dan Terapan Kimia (Jurnal Ilmiah Berkala) published scientific articles in the Chemistry field which include, but not limited to, research in chemistry, theoretical chemistry, chemistry education, and applied chemistry. This journal also published review articles about the development of chemistry.
Arjuna Subject : Kimia(semua kategori) - Inorganic Chemistry
Articles 6 Documents
 1 
Search results for , issue "Vol 18, No 1 (2024)" : 6 Documents clear
CHARACTERIZATION OF NON-POLAR ORGANIC COMPOUNDS FROM Padina minor MACROALGAE FROM SINGKAWANG WATERS AND ANTIBACTERIAL ACTIVITY AGAINST Staphylococcus aureus AND Escherichia coli Wardani, Fina Rika; Sapar, Ajuk; Alimuddin, Andi Hairil
Jurnal Sains dan Terapan Kimia Vol 18, No 1 (2024)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v18i1.15618

Abstract

Characterization of nonpolar organic compounds of macroalga Padina minor from Singkawang waters and activity against Staphylococcus aureus and Escherichia coli bacteria has been carried out. The stages of this research consisted of maceration, fractionation, phytochemical tests, characterization using FTIR and GC-MS, as well as testing the antibacterial activity with the well-diffusion method. The fractionation process produces n-hexane, dichloromethane, and methanol fractions. The n-hexane fraction was selected for packaging using gradient n-hexane: dichloromethane eluent and yielded 11 combined fractions (F1RW1-F1RW11). The combined fraction F1RW2 was separated again using n-hexane: dichloromethane eluent in a gradient manner and 18 combined fractions (F2RW1-F2RW18) were obtained. Then the F2RW4 isolate was characterized for GC-MS characterization and the F2RW3 isolate was characterized using FTIR. The FTIR interpretation results show the absorption of hydroxyl groups O-H (345.65 cm-1), C=O (1743.65 cm-1), C=C bonds (1633.71 cm-1), C-H (2926.01; 2854.01, 1438.9 and 723.31 cm-1), and C-O-C bonds (1170.79 cm-1). The results of the GC-MS analysis showed that the F2RW4 fraction had 2 main compounds, namely methyl decanoate and 11-methyl octadecenoate. The results of the antibacterial activity test showed that the methanol extract and n-hexane fraction of Padina minor were inactive against the inhibiting bacteria Staphylococcus aureus and Escherichia coli. Keywords:  Padina minor, FTIR, GC-MS, Antibacterial
The Effect Of ZnO Mass Variation On Chitosan/ZnO/Cellulose Acetate Composites From Citronella Waste As A Mask Filter Material Nadia, Nadia; Asriza, Ristika Oktavia; Adisyahputra, Adisyahputra
Jurnal Sains dan Terapan Kimia Vol 18, No 1 (2024)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v18i1.17305

Abstract

ABSTRACT Air is an important component that affects human survival, but air quality in Indonesia has greatly decreased due to air pollution. This study used chitosan / ZnO / cellulose acetate composite membranes made from citronella waste as mask filters with ZnO variations of 1%, 2%, and 3%. Composite membranes are made by the phase inversion method and characterized by FTIR, tensile, SEM, and antibacterial tests. Optimum conditions based on the formation of pores measuring 0.17 μm are found in chitosan/ZnO/Cellulose Acetate composite membranes with a  variation of  3%  ZnO. In addition, this variation also has good mechanical properties, with an elongation value of 2.1177% and an elastic modulus of 6.5560 N/m². Based on antibacterial tests, the composite membrane of the 3% ZnO variation also showed the ability to increase antibacterial activity with moderate antibacterial inhibitory strength. Keywords: Composite, Filter Mask, Cellulose Acetate, Chitosan, ZnO
Phytochemical Screening and Cytotoxicity Test of Sidaguri Leaf (Sida rhombifolia Linn.) Fractionated Extract with Brine Shrimp Lethality Test (BSLT) Method Tumanggor, Lisnawati
Jurnal Sains dan Terapan Kimia Vol 18, No 1 (2024)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v18i1.17411

Abstract

Traditional medicine can be an alternative in the treatment of cancer. One of the traditional medicines used as herbal ingredients that has the potential to be anticancer is sidaguri ( Sida rhombifolia Linn.). The leaves of S. rhombifolia are plants belonging to the family Malvaceae . S. rhombifolia plants contain chemical compounds. This study aims to determine the chemical content of sidaguri extract and potential cytotoxicity based on LC50 (Lethal Concentration 50) values in the death of nauplii Artemia salina Leach after administration of ethanol extract and n-hexane fraction, ethyl acetate and water. The method used S. rhombifolia leaves that have been in the form of simplicia were extracted with 70% ethanol solvent using the ultrasonication method. Then tested for the content of chemical compounds. Phytochemical screening results showed that S. rhombifolia ethanol extract contained alkaloid compounds, flavonoids, saponins, tannins, and triterpenoids. The ethanol extract was further fractionated using the solvents n-hexane, ethyl acetate and water. The cytotoxicity of S. rhombifolia extract was tested using the Brine Shrimp Lethality Test (BSLT) method using ethanol extract, n-hexane fraction, ethyl acetate fraction and toxic water fraction against Artemia salina or less than 1000 ppm, of the four test extracts that had the smallest LC50 value was ethanol extract which was 320.15 μg / ml and a lkaloid compounds fractionated from ethanol extract of Sidaguri leaves Fraction n hexan 600.10 μg / ml, ethyl acetate 575.06 μg / ml and water 873.21 μg / ml results obtained that ethanol extract is more cytotoxic than fractionation.
Superhydrophobic Silica Ultrasonic Coating Based on Sinabung Volcanic Ash as Anti-Corrosion of Ferrous Metal Materials Simanjuntak, Christin T. N.; Siagian, Dea Gracella; Simatupang, Kristian Adinata Pratama; Sihotang, Dafit Ericson; Simatupang, Lisnawaty
Jurnal Sains dan Terapan Kimia Vol 18, No 1 (2024)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v18i1.17719

Abstract

This research aims to measure the superhydrophobic performance of silica and the effect of sonification (ultrasonically dip coating) on the effectiveness of coatings on iron metal in corrosive solutions of 15% HCl (v/v) and 3.5% NaCl (w/v). This research utilizes ultrasonic waves to disperse superhydrophobic silica and paint into a homogeneous mixture and applies this mixture as a protective coating material on the surface of iron metal with the help of ultrasonic waves with the aim of increasing its ability to inhibit iron metal corrosion. The main material used in this research is Sinabung volcanic ash-based silica which was synthesized using the sol-gel method. The addition of superhydrophobic silica material to the paint was carried out by dispersing (0; 0.6; 1.2; 1.8) g with 10 mL of paint using an ultrasonic homogenizer for 15 minutes. The corrosion test was carried out by immersing the sample in a corrosive solution for 96 hours. As a result, sonification (ultrasonically dip coating) and variation in superhydrophobic silica composition are shown to affect the corrosion resistance of ultrasonic superhydrophobic silica coatings on iron surfaces. As a result of the lowest corrosion rates in each solution, 64.51 mpy (HCl 15%) and 2.63 mpy (NaCl 3.5%) were achieved. Invariant superhydrophobic silica compositions of 1.8:10g/mL showed the highest inhibitory effectiveness of 83.40% (HCl 15%) and 93.75% (NaCl 3.5%).
Comparative Analysis of Maceration and Soxhlation Extraction for The Total Flavonoid Content of Sungkai Leaves (Peronema canescens Jack.) Jaya, Fahriza Kusuma
Jurnal Sains dan Terapan Kimia Vol 18, No 1 (2024)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v18i1.17638

Abstract

The sungkai leaf (P. canescens Jack.) is an indigenous plant of Indonesia that has been utilized as a mouthwash and for treating minor wounds in traditional medicine. This study aimed to determine the total flavonoid content of P. canescens Jack leaf extract using maceration and soxhlation extraction methods. The total flavonoid content in the leaf extract of P. canescens Jack was determined using a UV-Vis spectrophotometer and a colorimetric technique (AlCl3) at a wavelength of 412 nm. The results were reported as the total flavonoid content in quercetin equivalent (EQ). The maceration step yielded 7.30%, whereas the soxhlation process yielded 15.34%. The maceration method yielded a total flavonoid content of 81.19 mgEQ/gram extract, whereas the soxhlation process yielded a flavonoid content of 69.068 mgEQ/gram extract.
Comparing the Effectiveness of Methods and Solvents on the Yield and Phytochemicals of Gerga Citrus Peel Essential Oil (Citrus nobilis L. Var RGL) from Kerinci Regency Noviarni, Intan; Hartati, Nina
Jurnal Sains dan Terapan Kimia Vol 18, No 1 (2024)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v18i1.16643

Abstract

Gerga orange was one of the leading commodities of Bengkulu province and also widely cultivated in Kerinci, Jambi. Nearly 75% of gerga orange peel was wasted without any processing. Orange peel was a plant that can be produced in to essential oil. However, the extraction effectiveness can be affected by the solvent and method. The purpose of this study was to determine the best solvent and method for extracting gerga orange peel essential oil. In addition, this research also aims to analyze the phytochemicals and yield. In this study, maceration and soxhletation methods will be compared to extract gerga orange peel essential oil with a variety of solvents with different polarities. The simplicia was macerated with ethanol, ethyl acetate and n-hexane solvents respectively for 3x24 hours. Then it was distilled to evaporate the ethanol. While the soxhletation method was conducted by soxhleted the simplicial for 4 hours. The results obtained yield of gerga orange peel essential oil by maceration method with ethanol, ethyl acetatee, n-hexane solvents, respectively, 23.04%; 16.05%; 11.80%, whereas with the soxhletation method 10.36%; 3.02%; and 2.04%. The maceration method with ethanol solvent was more effective for extracting the essential oil of gerga orange peel. Based on phytochemical screening the main secondary metabolites in the essential oil of gerga orange peel were phenolic and flavonoid. There was no saponin detected in the essential oil of gerga orange peel.Keywords: maceration, soxhletation, Citrus nobilis L. Var RGL, phytochemicals

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