Acta Chimica Asiana http://aca.unram.ac.id/index.php/ACA <p><strong>Acta Chimica Asiana </strong>(online <a href="http://issn.pdii.lipi.go.id/issn.cgi?daftar&amp;1489059749&amp;1&amp;&amp;">ISSN 2550-0503</a>, print <a href="http://issn.pdii.lipi.go.id/issn.cgi?daftar&amp;1489064854&amp;1&amp;&amp;">ISSN 2550-049x</a>) 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 is published by Chemistry Education Program, 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.</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> The University of Mataram en-US Acta Chimica Asiana 2550-0503 <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> Quantum Dynamic Approach of B2N(∓,0) and N2B (∓,0) Clusters Study: A Symmetry Breaking due to the Jahn-Teller Effect http://aca.unram.ac.id/index.php/ACA/article/view/168 <p>BN compounds play an important role in the preparation of hyper- thin films, that have received signifcant attention in products. In this article, we investigated the electronic structures of and. Triatomic NBN and BNB have recently been studied using various experimental and calculation approaches, and it is totally agreed that both of them are linear in their&nbsp; ground electronic step. The six ions including B<sub>2</sub>N<sup> (-)</sup>, B<sub>2</sub>N<sup> (+)</sup>, B<sub>2</sub>N<sup> (0)</sup> , BN<sub>2</sub><sup> (-)</sup>, BN<sub>2</sub><sup> (+)</sup> and BN<sub>2</sub><sup> (0)</sup> have been studied and been also compared with one another in terms of several basis sets and predication of the symmetry breaking (SB) subject. Artifactual SB with the <em>v</em><sub>3</sub> vibration is occurred in the <em>trial </em>wave functions of coupled-cluster level, even when Brueckner orbitals of all nitrogen and oxygen atoms are used. In the &nbsp;of &nbsp;and &nbsp;molecules, the unpaired electrons are delocalized, while in the asymmetric, they are localized on either one of the B atoms or N atoms of &nbsp;and &nbsp;, respectively. Structures with (SB),, can be stronger by interaction to the . Hereby, the second-order Jahn-Teller effect allows the unpaired electron to localize on boron atom, rather than being delocalized. Finally, from a statistical thermodynamical analysis, we calculated the thermodynamically stabilities of those six ions.</p> Majid Monajjemi Copyright (c) 2024 Majid Monajjemi https://creativecommons.org/licenses/by-nc-sa/4.0 2024-04-17 2024-04-17 7 1 356 365 10.29303/aca.v7i1.168 Study of inorganic based anti-blocks as migration control of slip additive on surface polyethylene monolayer film http://aca.unram.ac.id/index.php/ACA/article/view/196 <p>Slip migration must be controlled to maintain the performance and quality of flexible packaging. Inorganic based anti-block materials can be used to control the slip migration. This paper reported the effect of anti-block type on the inhibition of slip migration on polyethylene monolayer film. A series of formulations were made with three different anti-block additives, namely talc, natural silica, and synthetic silica, along with erucamide. The optical properties (haze) and friction properties (COF) were measured to assess the film characteristics as the development of slip migration in the presence of anti-block additives. Characterization of the anti-block material was conducted by SEM-EDX, slip additive type was examined by GC-MS, &nbsp;while the slip content on the surface was analysed by FTIR. The result showed that after seven days, synthetic silica anti-block gives COF up to 0.095, with the trace erucamide content on the film surface of 394 ppm, the lowest amongst other types of the anti-block used. The smaller particle size and higher silica content on synthetic silica anti-block resulted in better friction properties which act as a good barrier to limit a migration of erucamide onto the film surface.</p> Laily Aulia Agustina Yeni Dwi Lestari Arrival Arsyad Adhinanda Muhammad Naufal Ariesta Jonghyun Choi Yuniar Ponco Prananto Rakhma Febriani Copyright (c) 2024 Laily Aulia Agustina, Yeni Dwi Lestari, Arrival Arsyad Adhinanda, Muhammad Naufal Ariesta, Jonghyun Choi, Yuniar Ponco Prananto, Rakhma Febriani https://creativecommons.org/licenses/by-nc-sa/4.0 2024-04-19 2024-04-19 7 1 366 376 10.29303/aca.v7i1.196 Gas Detecting Evaluation by Graphitic-based Silicon Carbide Nanosurface doped with Manganese: A Promising Device for Air Pollution Monitoring http://aca.unram.ac.id/index.php/ACA/article/view/171 <p>Silicon carbide (SiC) as a direct broad bandgap semiconducting material has the potential to bring a considerable developement into optoelectronic and electronic devices. This article aims to investigate</p> <p>Physico-chemical properties of manganese (Mn)–doped graphene-like silicon carbide (SiC) monolayer sheet by the first-principles methods based on the density functional theory (DFT) for scavenging of CO, CO<sub>2</sub>, NO, NO<sub>2</sub> gas molecules. The results recommend that the adsorption of these gas molecules on Mn-embedded SiC sheet monolayer is more energetically desired than that on the pristine ones. Gas molecules of CO, CO<sub>2</sub>, NO, NO<sub>2</sub> have been adsorbed on the Mn site of doped SiC monolayer through the formation of covalent bonds. The assumption of chemical adsorptions has been approved by the projected density of states (PDOS) and charge density difference plots. Charge density difference calculations also indicate that the electronic densities were mainly accumulated on the adsorbate of CO, CO<sub>2</sub>, NO, NO<sub>2</sub> gas molecules. The ability of SiC nanosheet for monitoring of CO, CO<sub>2</sub>, NO and NO<sub>2</sub> is fluctuated by their selectivity and sensitivity through NMR, NQR, IR and HOMO/LUMO approaches which can represent the efficiency of Mn–doped SiC surface as the promising sensors toward air pollution detecting.</p> Fatemeh Mollaamin Copyright (c) 2024 Fatemeh Mollaamin https://creativecommons.org/licenses/by-nc-sa/4.0 2024-04-19 2024-04-19 7 1 377 389 10.29303/aca.v7i1.171 Effect of water-methanol binary solvent system in green synthesis of copper nanoparticles with tobacco leaf extract http://aca.unram.ac.id/index.php/ACA/article/view/197 <div><span lang="IN">The increasing demand for environmentally friendly nanoparticle synthesis, as a viable strategy for pollution control, has prompted an exploration of green chemistry methods. This study meticulously investigates the synthesis of copper nanoparticles utilizing tobacco leaf extract obtained through both cold and hot extraction techniques. The primary focus lies in scrutinizing the impact of various solvents employed for plant extracts and metal ion solutions on reduction dynamics and particle size. The study employs UV-Vis and phytochemical analyses to discern differences in chemical composition and efficacy, particularly between the water and methanol-water systems, despite their resemblance in UV-Vis spectra. Intriguingly, the results unveil that the choice of solvent significantly influences the particle size distribution and stability of colloidal nanoparticles. The methanol-water system, in particular, yields smaller, more uniform particles compared to other solvent systems. This research sheds light on the pivotal role of solvent selection in nanoparticle synthesis, emphasizing its profound impact on both the reduction process and the resulting particle size distribution. The findings underscore the nuanced relationship between solvent choice and the characteristics of the synthesized nanoparticles, providing valuable insights for optimizing environmentally friendly synthesis methods. Ultimately, this study contributes to the growing body of knowledge on green chemistry approaches for nanoparticle synthesis with implications for pollution control and sustainable materials production.</span></div> Tomi Suharto Sudirman Sudirman Maria Ulfa Baiq Nila Sari Ningsih Khoiria Nur Atika Putri Panthong Thamsiri Copyright (c) 2024 Tomi Suharto, Sudirman, Maria Ulfa, Baiq Nila Sari Ningsih, Khoiria Nur Atika Putri, Panthong Thamsiri https://creativecommons.org/licenses/by-nc-sa/4.0 2024-04-18 2024-04-18 7 1 390 395 10.29303/aca.v7i1.197 Determining the preeminent plastic wastes in the production of petrol using pyrolysis method and its effectiveness as an alternative fuel http://aca.unram.ac.id/index.php/ACA/article/view/189 <p><strong>Abstract: </strong>This study aimed to determine which type of plastic – PET, HDPE, LDPE, PP, PS, and Others, produces most oil yield in terms of time of complete degradation, temperature and amount of plastics using a non-catalytic slow pyrolysis method; it also determined the physical characteristics of the oil yield in terms of its color and appearance; and it also aimed to determine which petroleum produced by different types of plastics are more efficient in terms of (a) production of oil and (b) combustion time. Production of oil and oil yield is presented in milliliters and percentage, respectively. Combustion time is expressed in seconds from the time of ignition to total disappearance of flame having 1ml of oil tested from each produced pyrolytic oil. Experimental-descriptive comparative method was used in determining the type of plastic that yields to most of pyrolytic oil. Based from gathered results, at constant temperature and amount of plastics, PS produced most petroleum at 29.5% oil yield followed by PP with 29%. While PET produced the least petroleum with 0.01% oil yield. Color varies at different types of plastics, given that PET and PP produces light brown color, LDPE produces light yellow while HDPE, PS and Others produces black color. PET, HDPE, PP, PS and Others produced liquefied petroleum while LDPE produces flammable wax product. PS produced most petroleum with 295ml (29.5%), and PET produced least oil with 1ml (0.01%). Combustion time varies at different types of plastics: PS at 145 seconds, PP at 141 seconds, HDPE at 115 seconds, Others at 78 seconds, LDPE at 77 seconds while PET produced non – flammable oil yield. Thus, PS is most efficient as an alternative fuel in terms of production and combustion time. For the betterment of similar study, future researchers are encouraged to test the pyrolytic oil yielded from different types of plastics in engine performance and machineries and the comparative performance to the available commercial fuels.&nbsp;</p> Nelson Jun Herrero Rosenda Azañon Abbie Jane Alvaro Darrel Ocampo Copyright (c) 2024 Nelson Jun Herrero, Rosenda Azañon, Abbie Jane Alvaro, Darrel Ocampo https://creativecommons.org/licenses/by-nc-sa/4.0 2024-04-19 2024-04-19 7 1 396 406 10.29303/aca.v7i1.189 Specific and nonspecific characteristics of the leaf extract of Blumea balsamifera originated from East Java, Indonesia http://aca.unram.ac.id/index.php/ACA/article/view/178 <p><em>Blumea balsamifera</em> extract has been shown to have biological activities such as anti-fungal, anti-tumor, radical scavenger, anti-obesity, hepatoprotective, antioxidant, anti-microbial, anti-inflammatory, antiplasmodial, and wound healing. The quality and efficacy of <em>B. balsamifera</em> extract are determined by its specific and nonspecific characteristics. This study explored the characteristics of B. balsamifera extract through a series of standardization processes. The dried leaves of <em>B. balsamifera</em> were powdered and macerated with 70% ethanol. After the solvent evaporation, a thick extract was obtained and stored in a refrigerator. The specific characteristics tested were organoleptic evaluation, total phenolic content (Folin-Ciocalteu method), total flavonoid content (aluminium chloride colorimetric method), and phytochemical screening using thin layer chromatography. The nonspecific characteristics tested were extraction yield, moisture content, total ash content, and acid-insoluble ash. The results of the study showed that the extraction process resulted in a yield of 13.4%. The extract had a thick and sticky appearance, a dark brown colour, a characteristic aroma, and a bitter taste. The moisture content, total ash content, acid-insoluble ash content, total phenolic content, and total flavonoid content of the extract were found to be 8.33±0.57 %ml/g, 11.63±0.86 %g/g, 2.26±0.12 %g/g, 43.86±0.89 mg GAE/g extract and 25.48±0.42 mg QE/g extract, respectively. Analysis using thin layer chromatography demonstrated that the extract included phenolics, flavonoids, terpenoids, and steroids.</p> I Made Wisnu Adhi Putra I Made Gde Sudyadnyana Sandhika Copyright (c) 2024 I Made Wisnu Adhi Putra, I Made Gde Sudyadnyana Sandhika https://creativecommons.org/licenses/by-nc-sa/4.0 2024-04-19 2024-04-19 7 1 407 416 10.29303/aca.v7i1.178 Assessment of the Ecological Impact of Pollution in the Damanganga River http://aca.unram.ac.id/index.php/ACA/article/view/201 <p class="whitespace-pre-wrap" style="margin: 0in; margin-bottom: .0001pt; text-align: justify;">The Damanganga River faces severe pollution from industrial effluents and sewage, impacting its ecological health. The study aimed to analyze the current water quality status at the proposed conventional barrage site across the river between Silvassa, Vapi and Daman in India. Water samples were collected from three sites along the river during different seasons and analyzed for physicochemical parameters like TDS, COD, BOD, nutrients, fecal coliforms, heavy metals, etc. as per standard methods. Principal component analysis (PCA) was done. GCMS profiling of organics was also carried out. Several parameters exceeded the desired limits. TDS, BOD, fecal coliforms were very high indicating organic pollution and sewage contamination. Dissolved oxygen was deficient at some sites. Cadmium, copper and iron exceeded limits due to industrial releases containing these metals. PCA showed organic pollution as the major degrading factor for water quality followed by industrial contamination. GCMS analysis revealed hazardous organics like petrochemicals, fatty acids, solvents, pesticides and aromatic pollutants at varying levels along the river’s course demonstrating pollution from oil spillages, industrial effluents and agricultural runoff. The findings confirm severe deterioration in the Damanganga's water quality from inadequately treated sewage and industrial discharges posing environmental and health risks. Stringent regulations, proper wastewater treatment, runoff control and regular monitoring are vital to improve the river's condition</p> Manoj Godhaniya Komal Antaliya Rajesh Patel Charmy Kothari Copyright (c) 2024 Manoj Godhaniya, Komal Antaliya, Rajesh Patel, Charmy Kothari https://creativecommons.org/licenses/by-nc-sa/4.0 2024-04-19 2024-04-19 7 1 417 425 10.29303/aca.v7i1.201 Antimicrobial of Ethanolic Extract from Marpuyan Stem Bark (Rhodamnia cinerea Jack) http://aca.unram.ac.id/index.php/ACA/article/view/193 <p>The Bark of Marpuyan Tree (<em>Rhodamnia cinerea</em> Jack) is a plant that has been empirically used by communities in Indonesia for the treatment of infectious diseases caused by bacteria and fungi. The bark of Marpuyan contains flavonoids, phenolics, and saponins. This study aimed to evaluate the antibacterial and antifungal activities of the ethanol extract of the bark of Marpuyan using the disc diffusion method at various extract concentrations, namely 30%, 25%, 15%, 10%, and 5%. The results of the antibacterial activity test against Gram-positive bacteria (<em>Staphylococcus aureus, Staphylococcus epidermidis, </em>and<em> Bacillus subtilis</em>) showed inhibitory zones with respective diameters of 11.67±0.21 mm, 12.29±0.43 mm, and 12.78±0.14 mm. These results indicate weak antibacterial activity. In the antibacterial activity test against Gram-negative bacteria (<em>Escherichia coli, Pseudomonas aeruginosa, </em>and<em> Salmonella typhi</em>), inhibitory zones were found with respective diameters of 13.05±0.05 mm, 12.58±1.78 mm, and 10.98±0.21 mm. These results also indicate weak antibacterial activity. However, in the antifungal activity test, no activity was found against <em>Candida albicans </em>and<em> Malassezia furfur</em>. Nevertheless, the ethanol extract of Marpuyan bark showed moderate antifungal activity against <em>Trichophyton mentagrophytes</em>, with an inhibitory zone diameter of 15.44±2.02 mm.</p> Musyirna Rahmah Nasution Ardhia Regita Cahyani Alya Aqilla Valentina Fitri Leni Triani Copyright (c) 2024 Musyirna Rahmah Nasution, Ardhia Regita Cahyani, Alya Aqilla, Valentina Fitri, Leni Triani https://creativecommons.org/licenses/by-nc-sa/4.0 2024-04-19 2024-04-19 7 1 426 436 10.29303/aca.v7i1.193 Fotocatalytic degradation of methylene blue by floating TiO2-coconut fiber http://aca.unram.ac.id/index.php/ACA/article/view/183 <p>Indonesia's expanding industrial sector has resulted in an increase in the use of dyes. Methylene blue (MB), a dye used in the batik and textile industries, has the potential to be detrimental to people and the environment. Recent research indicates that the TiO<sub>2</sub> photocatalyst has the ability to reduce MB. TiO<sub>2</sub> transported in coconut fiber can improve illumination in the photocatalysis process. The purpose of this study is to examine the properties and activity of a TiO<sub>2</sub>-coconut fiber photocatalyst. SEM-EDX was used to characterize the morphology and composition of floating catalysts, and Fourier transform infrared (FT-IR) was used to characterize the functional groups. At 120 minutes, TiO<sub>2</sub>-coconut fiber photocatalysis with a mass ratio of 20:80 w/w demonstrated the maximum degradation of 62.72%. The SEM-EDX data demonstrate the morphology of TiO<sub>2</sub> distribution on the surface of coconut fiber, which is distinguished by the presence of the main elements O, Ti, and C. The FT-IR study results demonstrate a shift and decrease in Ti-O absorption intensity from 756,09 cm1 to 721,38 cm1, indicating the presence of Ti-O-C bonds. It is hoped that this research will be useful in the treatment of MB in textile industry waste or other organic waste.</p> Didiek Sugandi Nelly Wahyuni Winda Rahmalia Copyright (c) 2024 Didiek Sugandi, Nelly Wahyuni, Winda Rahmalia https://creativecommons.org/licenses/by-nc-sa/4.0 2024-04-19 2024-04-19 7 1 437 442 10.29303/aca.v7i1.183