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Acta Chimica Asiana
Published by Universitas Mataram
ISSN : 2550049x     EISSN : 25500503     DOI : -
Core Subject : Science,
Chemistry
Acta Chimica Asiana (online ISSN 2550-0503, print ISSN 2550-049x) is a peer-reviewed, open access journal that publishes high-quality original research articles as well as review articles in all areas of Chemistry and Chemical Engineering. Significant finding that is insufficient to be presented as comprehensive paper but needs to reach the reader immediately may also be submitted as a short communication. The editors welcome original contributions that have not been published and are not under consideration elsewhere. This journal published by the Indonesian Chemical Society, Chapter Nusa Tenggara and the University of Mataram. All papers published free of charge. Upon request, language assistance may also be provided to ensure valuable works in chemistry meet their readers. Acta Chimica Asiana is a peer-reviewed, open access journal that publishes original research articles, review articles, as well as short communication in all areas of chemistry, including applied chemistry, and chemical engineering. Subject areas include (but are by no means limited to): 1. Analytical chemistry, including new techniques and instrumentation 2. Biochemistry and medicinal chemistry 3. Inorganic chemistry, including main group, transition metal, and f-block compounds, as well as coordination, organometallic, and solid state chemistry 4. Materials chemistry of hard and soft matter, from the nanoscale upwards 5. Nuclear chemistry and radioactivity 6. Organic chemistry, including synthesis, characterization, and properties of organic compounds, as well as study of organic reactions and their mechanisms 7. Physical chemistry and chemical physics 8. Sustainable, green, and environmental chemistry 9. Theoretical and computational chemistry
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 116 Documents
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Utilization of Waste Shells as Cao Catalyst in Biodiesel Production from Used Cooking Oil Umei Latifah Azzahro; Wisnu Broto
Acta Chimica Asiana Vol. 5 No. 1 (2022)
Publisher : The University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v5i1.69

Abstract

This research is motivated by the depletion of energy reserves while the need continues to grow. Biodiesel is an alternative fuel produced from vegetable oil, animal fat, waste oil, etc. This study aims to determine the best transesterification treatment variables and the most significant main effect using the 2 level 3 factorial design method and operating times of 50 minutes and 70 minutes. The maximum transesterification condition was found by adding a 4% (w/w) CaO catalyst, 70 minutes of transesterification time, and 70 oC of operating temperature. The biodiesel characteristics obtained were a viscosity value of 4.8908 cSt, a density of 853.2 kg/m3, a yield of 78.1%, and a cetane number of 39. The most significant effect was the percentage of catalysts.
The separation of alkyldiethanolamide based on Kernel oil of Calophyllum inophillum fruit using High-Performance Liquid Chromatography Masrori Iqbal; Dedy Suhendra; Erin Ryantin Gunawan
Acta Chimica Asiana Vol. 5 No. 1 (2022)
Publisher : The University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v5i1.78

Abstract

This study aimed to separate the synthesized alkyldiethanolamide from kernel oil Calophyllum inophyllum (Local name: Nyamplung) using High-Performance Liquid Chromatography (HPLC). HPLC column utilized was SGE ODS-2 reverse phase and UV detector 213 nm. The variables to obtain the optimum conditions for separating alkyldiethanolamide were mobile phase and flow rate. The mobile phase composition and the optimum separation flow rate obtained acetonitrile: water (90:10) and 1.5 mL/minute, respectively. The percentage compositions of amide fatty acids that had been successfully synthesized based on HPLC were linoleoyl diethanolamide (46-49%), oleoyl diethanolamide (27-29%), palmitoyl diethanolamide (11-14%), and stearoyl diethanolamide (9-11%).
Cinnamon (Cinnamomum burmannii) Bark Essential Oil as Raw Material for Skin Cream and Anti-Bacterial Sandra Lewa; Sanusi Gugule
Acta Chimica Asiana Vol. 5 No. 1 (2022)
Publisher : The University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v5i1.80

Abstract

Research has been carried out to identify the essential oil components of cinnamon bark (Cinnamomum burmannii) which will be used in the manufacture of face creams and to test its inhibition against Staphylococcus aureus bacteria. Cinnamon bark essential oil was separated by steam distillation method. The essential oils obtained were identified by gas chromatography-mass spectroscopy (GC-MS) and infrared spectra. The GC-MS chromatogram of cinnamon bark essential oil yielded 3 peaks. The compound that has the largest retention time and concentration is 1,3 octadien-3-ol (linalool). Analysis of absorption data in the infrared spectrum resulted in 3 specific bonds, namely C=O (aldehyde), C=C (aliphatic), and C=N (imin) groups. The results of the formulation and characteristic test of cinnamon bark essential oil cream, all formulations met the National Standard, namely pH 7, adhesion 28.61 seconds, spreadability of 6.1 cm. Inhibition against Staphylococcus aureus was tested using the diffusion method. The greatest inhibitory power was found at a concentration of 15% with a clear zone formed of 2.15 mm.
Reaction Kinetics in the Pyrolysis of Human Hair Waste I Dewe Ketut Anom; John. Z. Lombok
Acta Chimica Asiana Vol. 5 No. 1 (2022)
Publisher : The University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v5i1.113

Abstract

Human haircuts are a waste, and they can cause environmental problems. The human haircuts waste from barbershops has not been appropriately handled. This waste will be burned or just thrown away. Human haircut waste is difficult to decompose in nature, and the importance of environmental conservation, it is necessary to innovate in processing human haircut waste into beneficial products. This study investigates the reaction kinetics of gas formation in the pyrolysis of human hair cutting waste. The research method used is pyrolysis at high temperatures in the absence of oxygen in the system and the system under a vacuum. The pyrolysis of unwashed and washed human hair pieces follows a first-order reaction. The kinetics parameters of gas formation on the pyrolysis of unwashed human hair followed the Arrhenius equation with K= Ae-9835.1/RT, and the activation energy was 81.769x103 kJ/mol. Meanwhile, the gas kinetics on the pyrolysis of washed human hair followed the Arrhenius equation with K= Ae-3667.1/RT and the activation energy value of 30.487x103 kJ/mol.
Crystallization of Mn(II) and Cd(II) Complexes in A Water-Methanol System: Tartrate vs Nicotinamide Ligand Selectivity Yuniar Ponco Prananto; Rafi Dwiasis Wibisono; Sasti Gona Fadhilah; Rachmat Tjahjanto; Darjito; Firsta Luthfiani Salsabila
Acta Chimica Asiana Vol. 5 No. 1 (2022)
Publisher : The University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v5i1.114

Abstract

Ligand selectivity of tartrate vs nicotinamide in a water-methanol system has been observed in the crystallization of Mn(II) and Cd(II) complexes. These complexes were crystallized at room temperature by a layered solution technique using a water-methanol mixture solvent in a M(II):tartrate:nicotinamide (M = Mn, Cd) molar ratio of 1:1:2. Complexes of M(II)-nicotinamide and M(II)-tartrate were also prepared for data comparison. Analysis of the crystals by infrared spectroscopy, powder-X-ray diffraction and qualitative anion test showed that in a presence of both tartrate and nicotinamide, the Mn(II) forms neutral Mn(II)-tartrate hydrate complex, whereas the Cd(II) forms ionic Cd(II)-nicotinamide chloride complex. In the case of Mn(II) complex, tartrate tend to coordinate as ligand than the nicotinamide, although molar ratio of nicotinamide was doubled than that of tartrate ligand. In contrast, the neutral nicotinamide ligand is more predominant to coordinate in the Cd(II) complex than the anionic tartrate. The tartrate-nicotinamide ligand selectivity in the crystallization of Mn(II) and Cd(II) complexes is likely due to the use of tartrate salt as precursor and the choice of solvent mixture. In addition, powder-XRD analysis confirms that there was no indication of M(II)-tartrate and M(II)-nicotinamide that co-crystallized together at the same time by both metal ions.
Potential of Pandanus Odorifer (Sea Pandan) Fruit as a Supplement to Increasing Chicken Appetite Hermansyah Amir; Nurhamidah; Sura Menda Ginting; Wike Suviolamei; Yosie Andriani HS
Acta Chimica Asiana Vol. 5 No. 1 (2022)
Publisher : The University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v5i1.115

Abstract

Pandanus odorifer (sea pandanus) is a plant that is commonly found in Bengkulu coastal areas, and research on this plant has not been done much. The results of previous studies show that sea pandanus with Pandanus tectoricus species contains primary and secondary metabolite compounds, especially in fruit that can be used as antioxidants, anti-bacteria, and others. This study aims to utilize unused P.odorifer fruit as a supplement to increase the appetite for Broiler chicken. Test animals used in the research are 7-day-old Broiler chickens. The P.odorifer samples used as supplements were obtained on the Sungai Suci Bengkulu Tengah Coast. Chickens were given four treatments, P0 control (1mL aquades/day), P1 supplement dose (0.5g/10mL), P2 dosing supplements (1g/10mL), and P3 dose supplement (1.5g/10mL). In general, the study results showed that P.odorifer fruit has the potential to be used as a supplement to increase the appetite of Broiler chicken, with a fat content of 3.92%, carbohydrate of 58.08%, and protein of 2.13%. The study results showed a significant effect of supplementation P.odorifer on Broiler chicken appetite, which was characterized by increasing body weight and eating portions. T-test results of the body weight and portion of the control group and the treatment group, the value of sig (2-tailed) ρ: 0.021 and sig (2-tailed) ρ: 0.016 and with value (α): 0.05, value ρ <α. And based on the results of the Completely Randomized Design analysis, the increase in the effect of P.odorifer supplements on Broiler chicken appetite is maximum at a concentration of 1.5gr/10mL weighing the 20 days of treatment with an F value <0.05.
Using Virtual Laboratory: A Profile of Students' Self-Efficacy on Electrochemistry Febrian Solikhin; Kristian Handoyo Sugiyarto; Jaslin Ikhsan
Acta Chimica Asiana Vol. 5 No. 1 (2022)
Publisher : The University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v5i1.116

Abstract

This study aimed to analyze the profile of students' self-efficacy in the use of virtual laboratory in electrochemistry class. It is quantitative descriptive research. The total subject of this research was 90 students from grade 12th public senior high school. Three classes were selected randomly to determine the sample: C class using conventional laboratory, E-1 class using virtual laboratories as a substitute, and E-2 class using both a virtual laboratory as a supplement. The instrument was a self-efficacy questionnaire that consisted of 22 items. The data were analyzed and categorized into 5 rating categories: very high, high, fair, low, and very low. The results showed that the profile of students' self-efficacy in the E2-class was highest than in 2 other classes.
Antibacterial Test and Isolation of Xanthones from Pericarps Mangosteen (Garcinia mangostana L.) using Calcium Oxide (CaO) as a Vacuum Liquid Chromatography (VLC) Stationary Phase Ni Komang Tri Dharmayani; Inggit Garnasih; Emmy Yuanita; Maria Ulfa; Sudirman Sudirman; Made Ganesh Darmayanti; Maulida Septiyana
Acta Chimica Asiana Vol. 5 No. 1 (2022)
Publisher : The University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v5i1.117

Abstract

Xanthones are one of the biggest classes of compounds in natural product chemistry. Xanthones have been isolated from pericarp mangosteen (Garcinia mangostana L.) and then purified with VLC using calcium oxide (CaO) as the stationary phase and eluted using n-hexane: EtOAc of increasing polarity. Extraction of the pericarp mangosteen using the maceration method with acetone as the solvent. The isolation of xanthones was carried out through various chromatography techniques, such as vacuum liquid chromatography (VLC), gravitational column chromatography (GCC), and thin layer chromatography (TLC). The molecular structure of the compound was identified based on spectroscopy data, including IR, 1D NMR (1H and 13C), and 2D NMR (HSQC and HMBC). Based on the analysis of spectrum data, the isolated compound is ɑ-mangostin. The acetone extract and ɑ-mangostin were also examined for antibacterial activity against Gram positive (+) Staphylococcus aureus (S. aureus) ATCC 25923 and Gram negative (-) Escherichia coli (E. coli) ATCC 25922. The largest inhibition zone was shown by ɑ-mangostin against S. aureus (12.16 mm) more than E. coli (12 mm).
Free radical scavenging actions of virgin coconut oil Jono Irawan; Aliefman Hakim; Saprizal Hadisaputra
Acta Chimica Asiana Vol. 5 No. 2 (2022)
Publisher : The University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v5i2.120

Abstract

Natural antioxidants are quite popular in beauty products. In further product development, natural antioxidants are needed from local products of the NTB community. This study aims to optimize the antioxidant activity of local products Virgin Coconut Oil (VCO) from Cocos nucifera L. grown in Lombok. This type of research is experimental laboratory research using the DPPH method. VCO was isolated by conventional methods, namely standing and layered filtration. Data were obtained from the results of the UV-Vis spectroscopy test. The results showed that the free radical inhibition of VCO was strong, with an IC50 value of 51.57 and an inhibition of 48% at a 5% VCO concentration. The absorbance of DPPH decreased with increasing reaction time. The decrease in absorbance from every 5 minutes indicates the antioxidant activity continues to a stationary point. A color change indicates the stationary point to yellow. The strong antioxidant activity of VCO is used as the basis for its use as an active ingredient in various cosmetic products. VCO is also believed to have a function as a natural moisturizer.
Effect of oxygen heteroatom on sensor-cyanide anions binding R Rahmawati; Fara Dwirani Sofia
Acta Chimica Asiana Vol. 5 No. 2 (2022)
Publisher : The University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v5i2.118

Abstract

The study aims to analyze the effect of heteroatom replacement on benzimidazole derivative chemosensor compounds on the ability to form hydrogen bonds with anions. In this case, the N heteroatom in the benzimidazole derivative sensor compound (S1) is replaced with the O heteroatom to become a benzoxazole derivative sensor compound (S3). Calculating the energy of the molecules involved in the electron level gives the following results: replacing heteroatoms with more electronegative atoms increases the HOMO energy of the sensor molecules, making the sensor more reactive to anions and strengthening the binding of the sensor with cyanide anions.

Page 5 of 12 | Total Record : 116

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