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Yulia Eka Putri
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yuliaekaputri@sci.unand.ac.id
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INDONESIA
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 5 Documents
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Search results for , issue "Vol. 11 No. 2 (2022): November 2022" : 5 Documents clear
Profil Fitokimia dan Uji Toksisitas Daun Tumbuhan Aglaia Odorata dengan Metode Brine Shrimp Lethality Test Mai Efdi; Ridho Sahary Adha; Adlis Santoni
Jurnal Kimia Unand Vol. 11 No. 2 (2022): November 2022
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.11.2.1-4.2022

Abstract

Toxicity and phytochemistry assay have been conducted on extracts and fractions of Aglaia odorata leaves using brine shrimp lethality test. Aglaia odorata is one of the plants that are found in Indonesia. To investigate Aglaia odorata leaves potential as anticancer, air-dried and powdered leaves were extracted with n-hexane, ethyl acetat, and metanol by using maceration method. Extract of ethyl acetat showed the highest toxicity with LC50 value is 125.89 mg/L
Detection and Absolute Quantification Porcine DNA in Sausages Using Quantitative Polymerase Chain Reaction (qPCR) Method Syafrizayanti; S. Safni; Nurhayati
Jurnal Kimia Unand Vol. 11 No. 2 (2022): November 2022
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.11.2.5-13.2022

Abstract

Identification of adulteration of processed meat products with unwanted ingredients is a crucial issue. These meat products are prone to forgery and mix with porcine. Meat source authentication is important for Muslim consumers to whom comsumption of products containing pork and its derivatives in an products is prohibited. This present study aims at development of detection and quantification method of porcine DNA (Deoxyribo Nucleic Acid) in processed meat products, sausages. Two novel primer pairs were designed specifically targeting fragment of Displacement Loop (D-Loop) and cytochrome b (cyt b) of porcine mitochondrial DNA and to generate 139 bp and 143 bp amplicons, respectively. Detection and quantification were accomplished by Quantitative Polymerase Chain Reaction (qPCR). Porcine DNA standard curves and cycle threshold were used for quantification. The detection limit of porcine DNA was as little as 0.05 pg. Of all sausages tested (n=13), four of them contained porcine DNA as much 3.1 pg; 0.160 pg; 0.294 pg; and 0.110 pg in 0.001 mg of sausages for J, G, I, and L samples respectively. The specific qPCR assay method can be used for the detection of porcine DNA in minute amounts, which can be used for the halal authentication of food and pharmaceutical products.
Pemanfaatan Ekstrak Lignin Dari Kulit Jengkol (Pithecellobium jiringa) Sebagai Inhibitor Korosi Baja Lunak Dalam Medium HCl Emriadi Emriadi; Savira Nurul Hayuni; Yeni Stiadi
Jurnal Kimia Unand Vol. 11 No. 2 (2022): November 2022
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.11.2.14-21.2022

Abstract

Lignin extract from jengkol peel (Pithecellobium jiringa) as a mild steel corrosion inhibitor in 1 M HCl solution was studied using weight loss method, characterization Fourier Transform Infra Red (FTIR), Ultraviolet-Visible (UV-Vis) spectroscopy, and optical microscopy. The inhibition efficiency increased with increasing temperature and the concentration of lignin extract in 1 M HCl solution. The highest efficiency value was 90,1% with the addition of 10 g/L extracts at 60°C. The adsorption of lignin extract from jengkol peel followed the Langmuir adsorption isotherm. Thermodynamic parameters such as Gibbs energy (ΔG), enthalpy (ΔH), entropy (ΔS), and activation energy were calculated to determine the mechanism of corrosion inhibition. FTIR analysis and UV-Vis spectroscopy showed an interaction between lignin extract from jengkol peel and mild steel surface. Optical microscopy analysis showed that lignin extract from jengkol peel could reduce the formation of rust on the steel surface.
Sintesis Nanopartikel Titanium Dioksida (TiO2) dengan Menggunakan Ekstrak Kulit Jeruk Gunung Omeh dan Karakteristiknya Diana Vanda Wellia; Shelvira Edelwita; Yulia Eka Putri
Jurnal Kimia Unand Vol. 11 No. 2 (2022): November 2022
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.11.2.22-30.2022

Abstract

In this study, TiO2 nanoparticles were synthesized without adding extract (0% v/v) (control) and with the addition of Gunung Omeh orange peel extract with various concentration, namely 4% v/v, 10% v/v, and 20% v /v. This study aims to study the use of Gunung Omeh orange peel extract on the formation of TiO2 nanoparticles and determine its characteristics. The characteristics of the resulting nanoparticles were characterized using X-Ray Diffraction (XRD), Diffuse Reflectance Spectroscopy, Ultraviolet-Visible (DRS UV-Vis), Scanning Electron Microscopy-Energy Dispersive X-Ray (SEM-EDX), Brunauer-Emmett-Teller (BET), Fourier Transform Infrared (FTIR), and Thermo Gravimetric and Differential Thermal Analyzer (TG-DTA). XRD results showed that the TiO2 phase formed was anatase. The optical property of TiO2 nanoparticles showed that the obtained TiO2 nanoparticles absorb in the UV region (200-400 nm). The results of SEM-EDX show that the resulting TiO2 nanoparticles are spherical. Meanwhile, the TOKJ20 sample has increased agglomeration so that the particle shape is rod-like. The EDX spectrum showes the presence of Ti and O peaks indicated the formation of TiO2. The results of BET measurement showed that the control TiO2 had a larger surface area of 66.11 m2/g compared to TiO2 using the addition of other orange peel extracts. From the results obtained, it was concluded that, in general, the addition of orange peel extract did not significantly affect the formation of TiO2 nanoparticles.
Sintesis Lapis Tipis SrTiO3 dengan Metode Solvotermal Melvi Muharmi; Yulia Eka Putri; Diana Vanda Wellia
Jurnal Kimia Unand Vol. 11 No. 2 (2022): November 2022
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.11.2.31-35.2022

Abstract

SrTiO3 thin layer were synthesized through solvothermal method by using FTO (fluorine-doped tin oxide) glass as a conductive substrate. The raw materials strontium nitrate (Sr(NO3)2) and titanium tetra isopropoxide (TTIP) were dissolved in ethanol solvent. Sample purity, elemental compositions and surface morphology were characterized using x-ray diffraction (XRD), energy dispersive x-ray (EDX) and scanning electron microscopy (SEM). XRD analysis showed that the synthesized SrTiO3 thin layer at 200oC for 24 hours with the addition of CTAB and TBA had intensity peaks that mathced the SrTiO3 standard (ICSD #94573) with perovskite structure. This result was supported by the XRD pattern of the sample powder. The EDX spectrum showed that titanium and oxygen were in the sample, but the presence of strontium was not found, due to its weak intensity. Based on the SEM image, the morphology seen is distributed equally and the grain size is rather smaller in the sample with the addition of CTAB and TBA.

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