cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Utami Irawati
Contact Email
uirawati@ulm.ac.id
Phone
+628115031771
Journal Mail Official
jstk@ulm.ac.id
Editorial Address
Jl. A. Yani KM. 36 Kompl. Unlam Banjarbaru
Location
Kota banjarmasin,
Kalimantan selatan
INDONESIA
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 244 Documents
 21   22   23   24   25 
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
Formulation and Evaluation Of Sheet Mask Essens From Cassava Leaf Extract (Manihot esculenta Crantz.) Anggianingrum, Rafiah; Rahmawanty, Dina; Sari, Destria Indah
Jurnal Sains dan Terapan Kimia Vol 18, No 2 (2024)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v18i2.15342

Abstract

Cassava leaves are plants that contain flavonoids and vitamin C that can act as antioxidants to ward off oxidation reactions due to free radicals so that the benefits of cassava leaves can be formulated into topical preparation from such as cosmetics one of them as a sheet mask essence. This study aims to determine the characteristics of essence sheet mask cassava leaf extract. The preparation is made with as many 3 formulas, with cassava leaf extract concentrations of 1.0%(F1), 3.0%(F2), and 5.0%(F3). The research method used for the manufacture of essence preparation is to mix all the ingredients and add cassava leaf extract and perfume. The essence preparation is evaluated including organoleptic, pH, viscosity, and stability tests. The result of this study obtained a yellow-orange yellow essence, with a characteristic aroma of lemongrass oil and liquid consistency. An increase in the concentration of the extract results in a decrease in pH and an increase in viscosity. This study concludes that variations in the concentration of cassava leaf extract affect the physical characteristics of sheet mask essence preparations on the organoleptic test, pH, viscosity, and mechanical stability tests of the three formulas are unstable against pH and organoleptic test, and in the cycling test all formulas are also physically unstable to viscosity and pH tests. 
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
Curcumin-Cellulose Film for Visual Detection of Fish Spoilage Adu, Risna Erni Yati; Gelyaman, Gebhardus Djugian
Jurnal Sains dan Terapan Kimia Vol 18, No 2 (2024)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v18i2.15550

Abstract

Fish spoilage can be monitored visually through a responsive film to freshness and pH changes. This study aims to produce a film that is responsive to pH changes in the fish environment from curcumin, a safer natural dye. The chemical, physical, and functional characteristics as well as the film response to pH change and fish freshness during storage were studied here. Cellulose-curcumin films were fabricated by impregnation of curcumin into cellulose films. The chemical characteristics such as functional groups and surface morphology were determined by FT-IR and SEM respectively. FT-IR presents an interaction between curcumin and cellulosic polymer. The impregnation of curcumin into the cellulose film caused the segregation on the film surface observed on the SEM photos and decreased the swelling index. Cellulose-curcumin films are highly responsive to both acidic and alkaline pH. At an acidic pH, the film is yellow while at an alkaline pH the film changes to a red-brown color. The film also presented a highly color change from orange to reddish brown with increasing of fish storage days. A higher antioxidant activity of 5.54% was presented by curcumin film than the cellulose pure film. Therefore, cellulose-curcumin film can be used to detect fish spoilage through direct visual inspection.
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.
Validation of Vitamin C Analysis Method and Evaluation of Antioxidant Activity of Various Plant Extracts From South Kalimantan Using UV-Vis Spectrophotometer Idris, Muddatstsir; Kasumawati, Fahrina
Jurnal Sains dan Terapan Kimia Vol 18, No 2 (2024)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v18i2.17595

Abstract

The UV-Vis spectrophotometer is commonly utilized for sample analysis in practicums, research, and community service. The analysis method employed in these activities must utilize a proven analytical technique to ensure the accuracy, precision, and accountability of the produced results. Hence, one of the aims of this study was to verify the vitamin C analysis technique for its linearity, accuracy (% recovery), precision (% RSD), limit of detection (LOD), and limit of quantitation (LOQ). Additionally, the validated analytical method will be employed to analyze the vitamin C content in pempaken fruit (Durio kutejensis Hassk (Becc.)) and kalangkala fruit (Litsea garciae Vidal). The linearity of a method was assessed by examining the correlation between the concentration (x-axis) and the response (y-axis). Percentage recovery was determined by quantifying the concentration of vitamin C in the sample and subsequently quantifying the concentration of vitamin C in the sample following the addition of a known quantity of a standard solution. The calculation of % RSD involves dividing the standard deviation (SD) by the average level (µg/mL) and then multiplying the result by 100%. LOD was determined by dividing the standard deviation by the slope value . Meanwhile, the determination of LOQ was accomplished by the use of a mathematical formula . South Kalimantan is abundant in medicinal plants, such as pampakin and kalangkala. Hence, another objective of this study was to assess the antioxidant activity of the extracts from these two plants using the DPPH method, employing a UV-Vis Spectrophotometer for analysis. The linearity, detection limit, quantitation limit, accuracy, and precision of the validated vitamin C analysis method were as follows: 0.999, 0.50ppm, 5.02ppm, 99.45-101.48%, and 0.03-1.33%, respectively. A 1.0 g sample of kalangkala and pampakin fruit contained 0.24 mg and 0.13 mg of vitamin C, respectively. The antioxidant activity test revealed that the kalangkala leaf extract exhibited potent antioxidant properties, with the solvents ranked in the following order of efficacy: methanol (IC50=23.03 µg/mL) > ethyl acetate (IC50= 27.16 µg/mL) > methylenechloride (IC50= 27.45 µg /mL) > n-hexane (IC50= 32.01 µg/mL). Pampakin leaves, kalangkala fruit, and pampakin fruit showed the highest antioxidant activity in methanol extract with IC50, respectively 50.29, 48.70, and 45.30 µg/mL. Based on the findings of this study, the vitamin C analysis method utilizing a UV-Vis spectrophotometer passes the validation requirements, and the antioxidant activity of pampakin and kalangkala fruit on DPPH free radicals is most likely attributable to the vitamin C found in these fruits. Meanwhile, extracts of the two plants derived from methanol demonstrated the strongest antioxidant activity when compared to other solvents such as n-hexane, methylene chloride, and ethyl acetate.
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
Application of Palm Solid Waste Ash as A Ceramic Glazing Material Suprabanindya, Caecilia Tridjata; Petrus, Himawan Tri Bayu Murti; Hazmi, Fariz Al
Jurnal Sains dan Terapan Kimia Vol 19, No 1 (2025)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v19i1.20083

Abstract

The aim of this research is to develop a glaze from palm oil solid waste ash. Oil palm plants were chosen because the ash of palm fronds, stems and trees have not been utilized optimally, only used as organic fertilizer and material for making furniture. This research is applied research involving expertise in the field of fine arts, especially ceramic art and chemical engineering, with an inquiry-based research approach. Laboratory tests (EDX Report) were carried out so that the process of modifying the ash glaze formula could be carried out more accurately. The output of this research is the palm oil solid waste ash glaze formula/recipe and ash analysis table along with test pieces of ash glaze trial results and ceramic work prototypes. In practice, organic ash cannot be used alone, but must be mixed with other ingredients so that it can potentially be processed into glaze. The glaze formula used in this research contains different mixtures of ingredients. In this research, organic ash was mixed with soil (Sukabumi and Kebumen) and ready-to-use frit glaze (F.107 and F.3T). Next, the ash glaze is burned at cone temperatures 5 and 6 (1150 0C–1200 0C). The test piece material used is Sukabumi clay which has been proven to be compatible with the oil palm plant ash glaze formula, resulting in a more varied, attractive, artistic and unique visual appearance of the work.

Page 24 of 25 | Total Record : 244

 21   22   23   24   25 

Filter by Year

2007 2025


Reset
Filter By Issues
All Issue Vol 19, No 1 (2025) Vol 18, No 2 (2024) Vol 18, No 1 (2024) Vol 17, No 2 (2023) Vol 17, No 1 (2023) Vol 16, No 2 (2022) Vol 16, No 1 (2022) Vol 15, No 2 (2021) Vol 15, No 1 (2021) Vol 14, No 2 (2020) Vol 14, No 1 (2020) Vol 13, No 2 (2019) Vol 13, No 1 (2019) Vol 12, No 2 (2018) Vol 12, No 1 (2018) Vol 11, No 2 (2017) Vol 11, No 1 (2017) Vol 10, No 2 (2016) Vol 10, No 1 (2016) Vol 9, No 2 (2015) Vol 9, No 1 (2015) Vol 8, No 2 (2014) Vol 8, No 1 (2014) Vol 7, No 2 (2013) Vol 7, No 1 (2013) Vol 6, No 2 (2012) Vol 6, No 1 (2012) Vol 5, No 2 (2011) Vol 5, No 1 (2011) Vol 4, No 2 (2010) Vol 4, No 1 (2010) Vol 3, No 2 (2009) Vol 3, No 1 (2009) Vol 2, No 2 (2008) Vol 2, No 1 (2008) Vol 1, No 2 (2007) Vol 1, No 1 (2007) More Issue