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Yulia Eka Putri
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Jurnal Kimia Unand
Published by Universitas Andalas
ISSN : 23033401     EISSN : 30262933     DOI : -
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology
Jurnal Kimia Unand has been registered with the number online ISSN: 3026-2933 and printed ISSN: 2303-3401. Jurnal Kimia Unand is a peer-reviewed journal published by the Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Andalas, Sumatera Barat, Indonesia. This journal is devoted to publishing original contributions on chemistry, applied chemistry, chemical engineering, and materials science, both theoretical and experimental studies. Among the research areas of interest are inorganic and organic, especially in developing materials with novel and/or valuable properties. Initially, J. Kim. Unand published articles in 2012, Volume 1. Number 1. November 2012 with a printed ISSN;2303-3401. This journal publishes 4 issues in 1 year and does not yet have an online journal system in the publishing process. This journal aims to publish the articles of undergraduate students of the Chemistry Department, Faculty of Mathematics and Natural Sciences, Andalas University, as one of the graduation requirements. In 2022, J. Kim. Unand initiated using OJS with an online ISSN, and the publishing frequency is two issues per year, in May and October. The criteria of the submitted article cover the following types of articles as follows: Communications. Research articles. Review articles. The scope of this journal includes: Organic synthesis and natural product chemistry Materials synthesis and characterization Synthesis of organic and inorganic compounds Theoretical and computational chemistry Fabrication, development, and validation of analytical methods Food and medicinal chemistry
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 6 Documents
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Search results for , issue "Vol. 11 No. 1 (2022): May 2022" : 6 Documents clear
Sintesis dan Karakterisasi Ni/MCM-41 dengan Metode Hidrotermal Admi; Radiatun Mardiah; Syukri Arief
Jurnal Kimia Unand Vol. 11 No. 1 (2022): May 2022
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.11.1.1-5.2022

Abstract

Synthesis of mesoporous silica (MCM-41) and mesoporous silica grafted with metal ion Ni(II) to form material (Ni/MCM-41) has been successfully carried out using the hydrothermal method. The results of the MCM-41 X-Ray Diffraction (XRD) characterization show a strong peak at 2q of 1.260 due to the reflection plane (100) and a very weak signal at 2q of 3.0° and 3.3° which corresponds to the reflection plane (110) and (200). The XRD pattern at this small angle indicates that MCM-41 material has been formed. MCM-41 is used as a support for grafting Ni(II) metal ions. After the Ni(II) metal ion was grafted to form Ni/MCM-41 material, the diffraction peak pattern did not change, but only a shift of the diffraction peak to the left (at a smaller angle), namely (100); (110) and (200) of 10°; 2.8°, and 3,0°. This proves the loading of 1% Ni(II) metal ions; 3% and 5% did not change the structure of MCM-41. Based on the FTIR results, the grafting of Ni(II) metal ions has been successful. Evidenced by the decrease in the absorption intensity of surface silanol groups in the range 3700-3200 cm-1 the number has decreased. This result was strengthened by a decrease in the intensity of the siloxane groups (Si-O-Si) in the range of 1250-1000 cm-1. Further evidence is strengthened by the appearance of a new vibrational band below 1000 cm-1 (980-1000 cm-1) which proves the existence of the Si-O-M+ (Si-O-Ni2+) spectrum. The results of this FTIR characterization prove that it has been successful in modifying the surface silanol groups of MCM-41 with metal ion Ni2+ to form Ni/MCM-41.
Penentuan Kandungan Antioksidan dan Fenolik Total dari Infusa Daun Tanaman Famili Myrtaceae Secara Spektrofotometri Yefrida; Hayatul Isra; Refilda
Jurnal Kimia Unand Vol. 11 No. 1 (2022): May 2022
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.11.1.6-11.2022

Abstract

Myrtaceae family plants are widely distributed in the tropics. The leaves of this plant have been widely used by the community as a traditional medicine. This study aims to determine the total antioxidant and total phenolic content of the infusion of five types of leaves of the Myrtaceae family, namely bay leaves (Syzygium polyanthum), jambak leaves (Syzygium malaccense), guava leaves (Psidium guajava), water guava leaves (Syzygium aqueum). and duwet leaves (Syzygium cumini). Total antioxidant content was determined using the MPM method and total phenolic content using the Folin Ciocalteau method. The highest total antioxidant content was found in jambak leaf infusion of 122.73 ± 3.10 mg AA/g DW, while the highest total phenolic content was found in guava leaf infusion of 58.84 ± 1.86 mg GAE/g DW.
Studi Komputasi Daidzein, Galangin, Genistein, Naringenin sebagai Inhibitor Korosi Besi dengan Metode DFT dan Membandingkannya dengan Luteolin Yeni Stiadi; Muhammad Ilham; Emriadi
Jurnal Kimia Unand Vol. 11 No. 1 (2022): May 2022
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.11.1.12-18.2022

Abstract

Corrosion inhibitors of daidzein, galangin, genistein, naringenin and luteolin compounds have been studied using the Density Functional Theory (DFT) method with the basis set B3LYP/6-31G using the Gaussian program. To prevent corrosion, organic inhibitors are needed which are safe for the environment. Therefore, researchers are looking for other organic inhibitors that have the potential to prevent corrosion. The calculated quantum chemical parameters are EHOMO, ELUMO, gap energy (∆E), ionization potential (I), electron affinity (A), electronegativity (X), hardness (ɳ), softness (σ), electrophilicity (ω), nucleophilicity (ε), mulliken charge density, back-donation energy (Eb-d), electron transfer (∆N), adsorption energy (Eads), and bond energy (Ebinding). Theoretical calculations show that naringenin is a good inhibitor compared to other compounds so that it can be used as an alternative organic inhibitor to replace luteolin. In this research, naringenin is a compound that has the potential as an inhibitor as seen from the structure and parameter calculations that have been carried out, so that naringenin can be used as an organic inhibitor to replace luteolin. The theoretical order of increasing inhibition is naringenin > genistein > galangin > daidzein. This theoretical study will greatly contribute to the experimental research of organic inhibitors because the theoretical increase in inhibition is already known.
Isolasi dan Karakterisasi Senyawa Metabolit Sekunder dari Ekstrak Etil Asetat Daun Salam (Syzygium polyanthum (Wight) Walp) Norman Ferdinal; Afrizal; Reynol Devryonda
Jurnal Kimia Unand Vol. 11 No. 1 (2022): May 2022
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.11.1.19-24.2022

Abstract

Salam plant (Syzygium polyanthum) is a plant from the Myrtaceae family and the Syzygium genus, which is widely used as a traditional medicine to treat hypertension, ulcers, diarrhea, skin diseases, lower cholesterol, control uric acid levels, and diabetes. This study aims to isolate and characterize secondary metabolites from the ethyl acetate extract of bay leaves. Isolation of secondary metabolites was carried out by column chromatography and characterization with Ultravolet-Visible (UV-Vis) and Fourier Transform Infrared (FTIR) spectrophotometers. The isolated compound is a white solid of 0.0082 g with a melting point of 190-192°C. The results of the identification of the phytochemical profile on the TLC plate with the Liebermen-Burchard (LB) reagent showed that the compound was a triterpenoid group. The results of the UV-Vis spectrum analysis showed maximum absorption at a wavelength of 221 nm indicating the presence of π-π* electron transitions from the unconjugated C=C bond and the results of the FTIR spectrum analysis showed the presence of OH, C-O (alcohol), C=C groups. (alkenes), C-H is aliphatic and geminal dimethyl.
Penentuan Kadar Astaxanthin, Uji Antiinflamasi Dan Sitotoksik Terhadap Sel Kanker Payudara Ekstrak Aseton Spirulina Platensis Armaini; Syafrizayanti; Zara Aulia
Jurnal Kimia Unand Vol. 11 No. 1 (2022): May 2022
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.11.1.25-32.2022

Abstract

Spirulina platensis is a microalgae widely used in the health sector due to its micronutrients, biopigment such as astaxanthin. Astaxanthin is carotenoid belonging to strong antioxidant, which has anti-inflammatory and cytotoxic effects on MCF-7 breast cancer cells. This study aims to determine astaxanthin contents, to investigate the anti-inflammatory activity and cytotoxic potential of breast cancer cells MCF-7 treated with acetone extract from Spirulina platensis. Extraction is done by maceration method. Astaxanthin contents were determined using UV-Vis spectrophotometer set to 479 nm. The anti-inflammatory assays were performed using inhibition of protein denaturation method and cytotoxic assays were performed using the MTT method. From results of study, the extract contained 6,3008 mg/L astaxanthin. The IC50 values for anti-inflammatory and cytotoxic tests ​​were 363,399 mg/L and 66,68 mg/L, respectively. According to the result of the tests, acetone extract from Spirulina platensis showed anti-inflammatory activity and moderate cytotoxic activity against MCF-7 breast cancer cells.
Penentuan Aktivitas Antioksidan, Kandungan Fenolik Total, dan Uji Sitotoksik dari Ekstrak Rumput Banto (Leersia hexandra Swartz.) Emil Salim; Suryati; Rifi Iron Akhfifni
Jurnal Kimia Unand Vol. 11 No. 1 (2022): May 2022
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.11.1.33-41.2022

Abstract

Banto grass, known as animal feed and tradicional medicine, has anticancer, antioxidant, and antihypertensive effect. The purpose of this study was to determine the secondary metabolite content, antioxidant activity, total phenolic content and cytotoxic activity. Maceration extraction with variation of solvent (hexane, ethyl acetate, and methanol) was used to obtain the banto grass extract. Antioxidant activity of the banto grass and control determined using 1,1-Diphenyl-2-picrylhydrazil (DPPH) method: Methanol (IC50 154,75 mg/L), Ethyl Acetate (IC50 224,47 mg/L) and Hexane (IC50 268,59 mg/L). Vitamin C (IC50 9,31 mg/L) served as control.The methanol extract had weak antioxidant activity while ethyl acetate and hexane extract had very weak antioxidant activity. The banto grass was screened for total phenolic content using Folin-Ciocalteu method: Methanol (0,3 mg GAE/g dry extract), Ethyl Acetate (0,23 mg GAE/g dry extract), and Hexane (0,11 mg GAE/g dry extract). There was negative correlation between IC50 and total phenolic content of the banto grass extract. Cytotoxic activity of the banto grass determined using Brine Shrimp Lethality Test (BSLT) method: Methanol (LC50 2454, 14 mg/L), Ethyl Acetate (LC50 233,13 mg/L) and Hexane (LC50 220,39 mg/L). The hexane and ethyl acetate extract had toxic properties while methanol extract had not toxic properties.

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