Acta Chimica Asiana http://aca.unram.ac.id/index.php/ACA <p><strong>Acta Chimica Asiana&nbsp;</strong>(online&nbsp;<a href="http://issn.pdii.lipi.go.id/issn.cgi?daftar&amp;1489059749&amp;1&amp;&amp;">ISSN 2550-0503</a>, print&nbsp;<a href="http://issn.pdii.lipi.go.id/issn.cgi?daftar&amp;1489064854&amp;1&amp;&amp;">ISSN 2550-049x</a>)&nbsp;is a peer-reviewed, open access journal that publishes high-quality original research articles as well as review articles in all areas of Chemistry, including Chemical Education 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 is published by Chemistry Education Program, the University of Mataram.&nbsp;All papers published free of charge. Upon request, language assistance may also be provided to ensure valuable works in chemistry meet their readers.</p> <p>Acta Chimica Asiana has been Accredited by the Ministry of Research, Technology and Higher Education of The Republic of Indonesia. The recognition published in Director Decree No.85/M/KPT/2020.</p> en-US <h4>Authors who publish with ACA: Acta Chimica Asiana agree to the following terms:</h4> <ol type="a"> <li>Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a <strong><a href="https://creativecommons.org/licenses/by-nc-sa/4.0/" target="_blank" rel="license noopener">Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License</a></strong>. This license allows authors to use all articles, data sets, graphics, and appendices in data mining applications, search engines, web sites, blogs, and other platforms by providing an appropriate reference. The journal allows the author(s) to hold the copyright without restrictions and will retain publishing rights without restrictions.</li> <li>Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in <a href="http://aca.unram.ac.id">ACA: Acta Chimica Asiana</a>.</li> <li>Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See <a href="http://opcit.eprints.org/oacitation-biblio.html" target="_new">The Effect of Open Access</a>).</li> </ol> <p> </p> telly@unram.ac.id (Lalu Rudyat Telly Savalas) rizal@unram.ac.id (Saprizal Hadisaputra) Sat, 30 Apr 2022 00:00:00 +0800 OJS 3.3.0.8 http://blogs.law.harvard.edu/tech/rss 60 Utilization of Waste Shells as CaO Catalyst in Biodiesel Production from Used Cooking Oil http://aca.unram.ac.id/index.php/ACA/article/view/69 <p>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 <sup>o</sup>C of operating temperature. The biodiesel characteristics obtained were a viscosity value of 4.8908 cSt, a density of 853.2 kg/m<sup>3</sup>, a yield of 78.1%, and a cetane number of 39. The most significant effect was the percentage of catalysts.</p> Umei Latifah Azzahro, Wisnu Broto Copyright (c) 2022 Umei Latifah Azzahro, Wisnu Broto https://creativecommons.org/licenses/by-nc-sa/4.0/ http://aca.unram.ac.id/index.php/ACA/article/view/69 Sun, 17 Apr 2022 00:00:00 +0800 The separation of alkyldiethanolamide based on Kernel oil of Calophyllum inophillum fruit using High-Performance Liquid Chromatography http://aca.unram.ac.id/index.php/ACA/article/view/78 <p>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%).</p> Masrori Iqbal, Dedy Suhendra, Erin Ryantin Gunawan Copyright (c) 2022 Masrori Iqbal, Dedy Suhendra, Erin Ryantin Gunawan https://creativecommons.org/licenses/by-nc-sa/4.0 http://aca.unram.ac.id/index.php/ACA/article/view/78 Sun, 17 Apr 2022 00:00:00 +0800 Cinnamon (Cinnamomum burmannii) Bark Essential Oil as Raw Material for Skin Cream and Anti-Bacterial http://aca.unram.ac.id/index.php/ACA/article/view/80 <p>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.</p> Sandra Lewa, Sanusi Gugule Copyright (c) 2022 Sandra Lewa, Sanusi Gugule https://creativecommons.org/licenses/by-nc-sa/4.0 http://aca.unram.ac.id/index.php/ACA/article/view/80 Sun, 17 Apr 2022 00:00:00 +0800 Crystallization of Mn(II) and Cd(II) Complexes in A Water-Methanol System: Tartrate vs Nicotinamide Ligand Selectivity http://aca.unram.ac.id/index.php/ACA/article/view/114 <p>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.</p> Yuniar Ponco Prananto, Rafi Dwiasis Wibisono, Sasti Gona Fadhilah, Rachmat Triandi Tjahjanto, Darjito, Firsta Luthfiani Salsabila Copyright (c) 2022 Yuniar Ponco Prananto, Rafi Dwiasis Wibisono, Sasti Gona Fadhilah, Rachmat Triandi Tjahjanto, Darjito, Firsta Luthfiani Salsabila https://creativecommons.org/licenses/by-nc-sa/4.0 http://aca.unram.ac.id/index.php/ACA/article/view/114 Wed, 27 Apr 2022 00:00:00 +0800 Potential of Pandanus Odorifer (Sea Pandan) Fruit as a Supplement to Increasing Chicken Appetite http://aca.unram.ac.id/index.php/ACA/article/view/115 <p><em>Pandanus odorifer</em> (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 <em>Pandanus tectoricus</em> 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 <em>P</em><em>.</em><em>odorifer</em> fruit as a supplement to increase the appetite for Broiler chicken. Test animals used in the research are 7-day-old Broiler chickens. The <em>P</em><em>.</em><em>odorifer</em> 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 <em>P</em><em>.</em><em>odorifer</em> 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 <em>P</em><em>.</em><em>odorifer</em> 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 &lt;α. And based on the results of the Completely Randomized Design analysis, the increase in the effect of <em>P</em><em>.</em><em>odorifer</em> supplements on Broiler chicken appetite is maximum at a concentration of 1.5gr/10mL weighing the 20 days of treatment with an F value &lt;0.05.</p> Hermansyah Amir, Nurhamidah, Sura Menda Ginting, Wike Suviolamei, Yosie Andriani HS Copyright (c) 2022 Hermansyah Amir, Nurhamidah, Sura Menda Ginting, Wike Suviolamei, Yosie Andriani HS https://creativecommons.org/licenses/by-nc-sa/4.0 http://aca.unram.ac.id/index.php/ACA/article/view/115 Wed, 27 Apr 2022 00:00:00 +0800 Antibacterial Test and Isolation of Xanthones from Pericarps Mangosteen (Garcinia mangostana L.) using Calcium Oxide (CaO) as a Vacuum Liquid Chromatography (VLC) Stationary Phase http://aca.unram.ac.id/index.php/ACA/article/view/117 <p>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).</p> Ni Komang Tri Dharmayani, Inggit Garnasih , Emmy Yuanita, Maria Ulfa, Sudirman Sudirman, Made Ganesh Darmayanti, Maulida Septiyana Copyright (c) 2022 Ni Komang Tri Dharmayani, Inggit Garnasih , Emmy Yuanita, Maria Ulfa, Sudirman Sudirman, Made Ganesh Darmayanti, Maulida Septiyana https://creativecommons.org/licenses/by-nc-sa/4.0 http://aca.unram.ac.id/index.php/ACA/article/view/117 Thu, 28 Apr 2022 00:00:00 +0800 Reaction Kinetics in the Pyrolysis of Human Hair Waste http://aca.unram.ac.id/index.php/ACA/article/view/113 <p>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.</p> I Dewe Ketut Anom, John. Z. Lombok Copyright (c) 2022 I Dewe Ketut Anom, John. Z. Lombok https://creativecommons.org/licenses/by-nc-sa/4.0 http://aca.unram.ac.id/index.php/ACA/article/view/113 Thu, 28 Apr 2022 00:00:00 +0800 Using Virtual Laboratory: A Profile of Students' Self-Efficacy on Electrochemistry http://aca.unram.ac.id/index.php/ACA/article/view/116 <p style="text-align: justify;">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.</p> Febrian Solikhin, Kristian Handoyo Sugiyarto, Jaslin Ikhsan Copyright (c) 2022 Febrian Solikhin, Kristian Handoyo Sugiyarto, Jaslin Ikhsan https://creativecommons.org/licenses/by-nc-sa/4.0 http://aca.unram.ac.id/index.php/ACA/article/view/116 Thu, 28 Apr 2022 00:00:00 +0800