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Jurnal Ilmiah Berkala: Sains dan Terapan Kimia

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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 8 Documents

Search results for , issue "Vol 16, No 1 (2022)" : 8 Documents clear

The Effect of Hydrolysis Time Using Microwave on Bioethanol Production from Sorghum Waste (Sorghum Bicolor L.) Sefrinus Maria Dolfi Kolo
Jurnal Sains dan Terapan Kimia Vol 16, No 1 (2022)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

In this study, the production of bioethanol from sorghum bagasse was carried out to understand the surface morphology of sorghum bagasse before and after hydrolysis, the effect of hydrolysis time using a microwave, and the concentration of inoculum on the ethanol content produced. A total of 10 grams of sorghum bagasse was suspended with 250 mL of 2% H2SO4 solution and then heated using a microwave at a temperature of 150ºC with variations in heating time of 20, 30,40, and 50 minutes. The heated hydrolyzate was analyzed for reducing sugar content using UV-Vis. The morphology of sorghum bagasse before and after hydrolysis was analyzed using SEM and quantitative analysis of fermented ethanol using a pycnometer and GC. The results showed that there were differences in the surface of sorghum bagasse before and after hydrolysis, the highest reducing sugar content was obtained at 30 minutes of hydrolysis, which was 30.4 g/L, and the highest concentration of Saccharomyces cerevisiae was 8% which resulted in 5.325% ethanol content using a pycnometer and 9.05% using GC. Keywords: Sorghum bagasse, Hydrolysis, Microwave, Bioethanol

Design of Vaccine Candidate Based on Ebola Virus Epitop With In Silico Approach Erwin Prasetya Toepak; Sari Namarito Simarmata; Sudarman Rahman; Stevin Carolius Angga
Jurnal Sains dan Terapan Kimia Vol 16, No 1 (2022)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

ABSTRACT The World Health Organization (WHO) recorded as many as 2,299 cases of death with a case percentage of 66% during 2018 to 2020 in the Democratic Republic of the Congo due to the Ebola virus. Ebola virus is a member of the Filoviridae family. One of the viro cores consists of glycoprotein (GP). Messenger RNA (mRNA) generates long GP chains for the attachment protein (GP 1) and the fusion protein (GP 2). Epitope-based vaccines are a promising approach because epitopes represent immunogenic regions that elicit immunity specifically. Epitope prediction was performed based on the GP EBOV sequence available in the Data Bank. The designed vaccine could be one of the candidates for the Ebola virus vaccine. The design of the virus with access to NCBI AAB81004 was carried out by testing such as B cell epitope, T cell, and their antigenicity using the VaxiJen v2.0 server and IEDB. The T cell epitope prediction results showed that 20 T cell epitopes interacted with the Major Histocompatibility Complex (MHC) with the highest score of 2.8069. B cell epitope by linear BepiPred assay had 77 candidate epitope peptides from sequence 401-477. Karplus and Schulz's flexibility predictions showed a predictive value of 1.119 with a threshold of 1.008, with the analyzed area having an antigenic tendency where the threshold area was yellow. Keywords: Ebolavirus; Vaccine; Epitope B Cell; Epitope T Cell; In Silico

Isolation and Characterization of Compounds from Cinnamon Oil (Cinnamomum burmanii) Distillation Residu Maria Dewi Astuti; Lathifah Fauzi; Kamilia Mustikasari
Jurnal Sains dan Terapan Kimia Vol 16, No 1 (2022)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

This study aimed to isolate and characterize compounds from the distillation residue of cinnamon oil from Loksado, South Kalimantan. Cinnamon (Cinnamomum burmanii) distillation residue was extracted with methanol as solvent. The methanol extract was fractionated by liquid vacuum chromatography to obtain fractions A, B, C, and D. The crystals contained in fraction C were washed with cold n-hexane to obtain 5.4 mg of yellow isolate (FC1). FC1 isolates were characterized by UV-Vis, IR, 1H-NMR, and 13C-NMR spectrophotometers. UV spectra showed a maximum wavelength at 307, 316, and 321 nm indicating the presence of a conjugated or aromatic system. The infrared spectra showed -C=O, -OH, C-O, C-H, C-N, and C=N groups. The 1H-NMR spectra showed the presence of aromatic protons at 6.38 ppm (1H, d, J=9.5 Hz), 7.67 ppm (1H, d, J=9.5 Hz), 7.29 ppm (1H, d, J=8 Hz), 7.44 ppm (1H, d, J=8 Hz), and 7.49 ppm (1H, t) and there was a methyl proton (acetyl group) at H 2.13 ppm (3H,s). The 13C-NMR spectra showed the presence of a C=O ketone group at 207.26 ppm and there were 9 C-sp2 at 116.9; 119.0;124.6; 128.1;132.0;143.7; 154.3; 161.0 ppm, which δC 161.0 ppm was C-oxyaryl. Based on UV, IR, 1H and 13C-NMR spectra data, FC1 isolate was suggested as an isoquinoline alkaloid substituted by OH and acetyl groups. Keywords: distillation residu, Cinnamomum burmanii, alkaloid, isoquinoline.

Moringa leaf (Moringa oleifera L) flavonoids utilization in suppressing growth of Aedes aegypti larvae Vinsensius Manek Ati; Ermelinda D. Meye; Refli Refli; Alfred O.M. Dima; Djeffry Amalo; Ursula Luhur Jebatu
Jurnal Sains dan Terapan Kimia Vol 16, No 1 (2022)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

The study was conducted to determine the potential use of Moringa leaf flavonoids as biolarvicides in suppressing the growth of Aedes aegypti mosquito larvae. The design used was a completely randomized design (CRD) with six flavonoid treatments including P0 (0 ppm flavonoids as a negative control), P1 (12.5 ppm flavonoids), P2 (25 ppm flavonoids), P3 (50 ppm flavonoids), P4 ( flavonoids 75 ppm), and P5 (flavonoids 100 ppm). Each treatment was repeated three times. The results of the analysis of diversity (Anova) revealed that Moringa leaf flavonoids had a very significant effect (P = 0.000) on the mortality of A. aegypti mosquito larvae. The administration of 50 ppm flavonoids of Moringa leaf extract caused the mortality of A. aegypti larvae to reach 95%, and at a concentration of 75 ppm, it increased the mortality percentage to 100%. The results of the probit analysis showed that the lethal concentration 50 (LC50) was achieved at a concentration of 7.96 ppm with exposure for 24 hours, while the lethal concentration-time 50 (LT50) at a concentration of 75 ppm was achieved in a shorter time (2.08 hours). Keywords: flavonoids, moringa leaf, Aedes aegypti, biolarvacide

Toxicity Testing of White Kapul Fruit Rind Extract (Baccaurea macrocarpa) and Component Analysis using Chromatography Method Kholifatu Rosyidah; Lisda Karmila; Maria Dewi Astuti
Jurnal Sains dan Terapan Kimia Vol 16, No 1 (2022)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

White Kapul was used in this study. This study aimed to determine the toxicity of the white Kapul fruit rind extract and its chemical content analysis using TLC and GC-MS. The extraction method used was gradual maceration, namely technical n-hexane, technical ethyl acetate, and technical methanol. Toxicity test using the BSLT method with Artemia salina larvae at the nauplii stage. The test showed that the LC50 value of ethyl acetate extract, methanol extract, and n-hexane extract was 350.87 ppm, 485.61 ppm, and 735.932 ppm, respectively. Based on LC50 values, all extracts had the potential as pesticides. The third extract of white Kapul fruit rind was carried out by TLC analysis to determine the pattern of its compound content. The results of the TLC analysis showed that each extract had different polarity compounds according to the polarity of each solvent. The most active extract, ethyl acetate extract, was further analyzed using GC-MS. There were 32 peak compounds at a retention time of 25.384 to 65.725 minutes in GC-MS analysis. Four compounds with the largest percentage area were gynoluton (58.09%), 15-chloro-4-pentadesene (16.25%), 17- (acetyloxy) -2-methyl-, (2α.,5α ,17β) - estra-3-on (6.07%), and methyl-11-octadesenoate (5.98%). Keywords: Baccaurea macrocarpa, Euphorbiaceae, TLC, toxicity, BSLT, GC-MS

Study on Adsorption Kinetics of Methylene Blue by Modified Sago Frond Waste Seniman Gempur Tirani; Sunardi Sunardi
Jurnal Sains dan Terapan Kimia Vol 16, No 1 (2022)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

The modified sago frond waste (PSM) using the Fast Microwave-Assisted Acid method, which has several characteristic changes, was tested to determine its adsorption ability to a cationic textile dye. PSM samples as adsorbents have variations in the modification of oxalic acid addition at 0; 1,5; 3,0 and 4,5% (w/v) were used for the adsorption of Methylene Blue (MB) dye on several parameters. This study was conducted to determine the adsorption kinetics through the effect of the ratio of the adsorbent and the contact time and the acid variation of the adsorbent as additional variables. Optimum MB absorption was obtained at a ratio of 0,6 g/L and a contact time of 120 minutes. The data results were analyzed using four general kinetic models: pseudo-first-order, pseudo-second-order, intra-particle diffusion, and Elovich equation. Adsorption followed the pseudo-second-order reaction rate with a coefficient of determination (R2) 0.9996-0.9999 in all variations of PSM. The theoretical adsorption capacity was 25.58 to 27.32 mg/g, and the effect of increasing acid on PSM increased the adsorption and absorption capacity of MB. Keywords: sago frond waste, adsorption, kinetic models, methylene blue.

The Effect of Drying Method on Potential Antioxidants in Ethanol Extract of Sungkai Leaf (Parenoma Canescens Jack.) Simplicia from Kalimantan Fahrina Kasuma Wati; Siti Hasnah - Hasnah
Jurnal Sains dan Terapan Kimia Vol 16, No 1 (2022)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Sungkai (P. canescens) is a medicinal plant whose leaves are used to alleviate fever and strengthen the body's immune system. This study aimed to determine the effect of the simplicia drying technique on the antioxidant potential of the ethanol extract of Sungkai leaves from Kalimantan. The drying method employed was oven drying at 70°C, oven drying at 50°C, sun drying, and wind drying. The study's findings indicated that the antioxidant activity of all drying techniques was in the very active category. The drying method with the lowest antioxidant potential was oven drying at 50°C with IC50 value of 13.340 ppm, wind drying with IC50 value of 14.610 ppm, sun drying with IC50 value of 16.799ppm, and oven drying at 70°C with IC50 value of 17.034 ppm. Keywords: Sungkai leaf ; IC50; antioxidant

The Effect of Activated Charcoal Coffee Grounds (Coffea Sp.) as an Adsorbent on the Quality of the Liquid Sugar of Siwalan Roy Darus
Jurnal Sains dan Terapan Kimia Vol 16, No 1 (2022)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

This study aimed to determine the adsorbent characteristics of coffee grounds activated charcoal (Coffea Sp.), optimum adsorption contact time, and differences in the quality of siwalan liquid sugar through adsorption and without adsorption. The characteristics of coffee grounds activated charcoal were determined by FTIR and SAA. FTIR characterization showed that activated coffee grounds charcoal contained functional groups of O-H, Csp2-H, Csp3-H, C-H2 methylene, C-O, and C=C-H. Characterization with SAA showed that the surface area of activated charcoal was 27.70 m2/g with a pore volume of 0.02 ml/g and an adsorption pore size of 1.63 nm. The optimum contact time of the adsorbent in the adsorption of impurities in the palm sap was 60 minutes. The siwalan liquid sugar, which went through adsorption, had a reducing sugar content of 6.70%, and the one without adsorption was 10.18%. While the ash content of siwalan liquid sugar through adsorption was 4.73%, and without adsorption was 6.5%. This value indicates that the quality of siwalan liquid sugar through adsorption is higher than that which does not go through the adsorption stage. Keywords: adsorption, activated charcoal, siwalan liquid sugar

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Utami Irawati

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Home Page

OAI Link

Editorial Team

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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

Abstract

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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