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All Journal ULIN: Jurnal Hutan Tropis Jurnal Komunitas: Jurnal Pengabidian Kepada Masyarakat Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Sains Materi Indonesia
Meliana, Yenny
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Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Public Health Other

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Use of Sulfuric Acid-Impregnated Biochar Catalyst in Making of Biodiesel From Waste Cooking Oil Via Leaching Method Sofyan, Muhammad Ihsan; Mailani, Putri Julpa; Setyawati, Avi Waras; Sulistia, Susi; Suciati, Fuzi; Hauli, Latifah; Putri, Reza Audina; Ndruru, Sun Theo C. L.; Mawarni, Rista Siti; Meliana, Yenny; Nurhayati, Nurhayati; Joelianingsih, Joelianingsih
Bulletin of Chemical Reaction Engineering & Catalysis 2024: BCREC Volume 19 Issue 1 Year 2024 (April 2024)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20113

Abstract

The biodiesel synthesis of waste cooking oil (WCO) over a impregnated biochar catalyst was systematically studied. This research aimed to prepare Biochar-based material that comes from coconut coir, activate it, and apply it as a catalyst to the esterification reaction of high-FFA waste cooking oil. Activation of the catalyst was done by impregnation H2SO4 solution in Biochar. The obtained catalyst was characterized by FTIR, XRF, XRD, surface area analyzer, and SEM-EDS. The esterification process was conducted by varying the catalyst weight (5, 7, and 10 wt%) and the reaction temperature (55 and 60 °C). The obtained liquid yields were characterized by GC-MS. The study found that the esterification process worked best with 10 wt% catalysts, a 1:76 mole ratio of oil to alcohol, and a reaction temperature of 60 °C. The waste cooking oil was successfully converted into biodiesel, reaching 84.50% of yield and 77.30% of purity (methyl ester content). Meanwhile, testing using national biodiesel standards with parameter limits of density, viscosity, iodine number, and acid number shows results that meet the requirements. Copyright © 2024 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Program Pelatihan Coping Self-Efficacy untuk Meningkatkan Self-Esteem Kelompok Basket Putri Selama Pandemi Mahardika, Dimas; Kandoko, Isabella Vannessa Pranata; Lithioni, Grace Veronica; Meliana, Yenny; Lukika, Olivia; Prayudi, Satrio Dhiaputra; Tondok, Marselius Sampe
Jurnal Komunitas : Jurnal Pengabdian kepada Masyarakat Vol. 6 No. 1: Juli 2023
Publisher : Institut Ilmu Sosial dan Manajemen Stiami

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31334/jks.v6i1.1746

Abstract

The Covid-19 pandemic can have a negative impact on the psychological condition of the basketball athlete community from this service activity. The purpose of the service program in the form of psychoeducation to the basketball athlete community is to increase self-esteem and coping self-efficacy. Coping self-efficacy describes a person's ability to perform certain behaviors successfully with the expected results. Self-esteem is a global evaluation of an individual's thoughts and feelings, and evaluations can be positive or negative. The partner groups in this training are four students who are members of the women's basketball group in Samarinda, with an age range of 15-17 years. The training materials are tailored to the needs of the partner community which is explored through needs analysis. The training is carried out online via Zoom in small groups of 4 people. Measurement of the process and results of service activities is carried out through questionnaires, observations, and online interviews. The results of the service showed an increase in self-esteem scores and coping self-efficacy in the partner group. From this training, service partners gain a new and more positive understanding of coping self-efficacy, self-esteem, and its aspects. Partner groups are able to apply the material that has been given in real life as basketball athletes.
Formulation and Characteristics of Sunscreen Cream based on Isolated Lignin from Oil Palm Empty Fruit Bunch (OPEFB) : Formulation and Characteristics of Sunscreen Cream Restu, Witta Kartika; Rusumayanti, Felli; Septiyanti, Melati; Muryanto; Aryana, Nurhani; Mawarni, Rista Siti; Meliana, Yenny; Sondari, Dewi; Fatriasari, Widya; Ogino, Chiaki
Jurnal Sains Materi Indonesia Vol. 26 No. 2 (2025): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2025.6199

Abstract

Lignin was recovered from black liquor during the biorefinery process and has prospective applications in pharmaceutical, cosmetic, and health care. Lignin, which has substantially smaller particles, was used as the active ingredient in the sunscreen cream formulation. The isolated lignin was examined for physicochemical parameters such as yield, purity, particle size, total phenol, and morphology. The obtained lignin was used in the preparation of sunscreen cream. The isolated lignin concentration in the cream varied between 0.1, 1, and 2 wt%. The sun protection factor (SPF) of the designed sunscreen creams was assessed, and antioxidant activity and stability were studied, which included pH, particle size, and appearance during the observation period. The formulated cream has an SPF of approximately 15, which is sufficient to protect human skin from the sun's UV radiation. Furthermore, the most significant antioxidant activity was found to be 68.94%. As a result, the developed sunscreen cream has the potential for further research because it is composed of natural active ingredients that are safe for humans and the environment.
Formulation and Characterization of Dewandaru Fruit Extract in Nanocarrier System Septiyanti, Melati; Nurfauziyah; Angelina, Marissa; Triana Dewi, Rizna; Fajriah, Sofa; Meliana, Yenny
Jurnal Sains Materi Indonesia Vol. 25 No. 2 (2024): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2024.3121

Abstract

Dewandaru (Eugenia uniflora L.) is a herbaceous plant that grows in tropical and subtropical regions. The fruit extract can prevent oxidative damage and cholinergic changes. It contributes to antihyperglycemic, antihyperlipidemic, and neuroprotective due to its antioxidants and antidepressant effect. It also possesses antibacterial and anti-inflammatory activity and potentially prevents cardiovascular disease and cancer. In this study, dewandaru fruit extract was formulated in the nanocarrier system (nanoemulsion and nanoencapsulation) to preserve product stability and improve product dispersibility and bioavailability. The nanoemulsion optimum formulation condition was obtained on dewandaru fruit extract concentration 10 wt%, oil/surfactant ratio 0.25, and homogenization speed 20.000 rpm, resulting in particle size of 46.4 ± 0.4 nm and polydispersity index 0.480 ± 0.015. The optimum nanoemulsion formulation was further processed to nanoencapsulation along with milling to produce finer particles. The nanoencapsulation milled for 120 minutes produced encapsulation powder with a size of 5.8 ± 3.340 μm. Accordingly, the nanocarrier technology for dewandaru fruit extract promoted a versatile medicinal preparation both in liquid and solid form. However, the size reduction by milling might disrupt the efficiency of the encapsulation release system. Without the proper coating, as orally administrated, the compound rapidly dissolved before it reached the targeted site.
Efek antibakteri formulasi sediaan serum wajah berbasis minyak atsiri sebagai bahan aktif dari rimpang bangle (Zingiber purpureum) Ruga, Ritbey; Putri, Agmi Sinta; Paramita, Swandari; Kiswanto, Kiswanto; Aswandi, Aswandi; Meliana, Yenny; Kuspradini, Harlinda
ULIN: Jurnal Hutan Tropis Vol 10, No 1 (2026)
Publisher : Fakultas Kehutanan Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32522/ujht.v10i1.19659

Abstract

Bangle (Zingiber purpureum) merupakan salah satu tanaman rimpang yang digunakan dalam pengobatan tradisional di Asia Tenggara. Penelitian ini bertujuan memperoleh minyak atsiri rimpang bangle dan menguji kualitas fisik serta aktivitas antibakterinya dalam sediaan serum wajah dengan variasi konsentrasi minyak atsiri 0% (F0); 2,5% (F1); 5% (F2) dan 10% (F3). Minyak atsiri diperoleh melalui destilasi uap dan air dengan rendemen 0,345%. Formula sediaan serum wajah berbasis minyak atisiri berbentuk gel yang tercampur sempurna, berwarna kuning pucat (warna minyak atsiri) serta memiliki bau khas aroma rimpang bangle, sementara F0 tidak berbau. Uji pH menunjukkan F0 berada pH 6, sementara F1 dan F2 stabil pada pH 5 selama 4 minggu. F3 menunjukkan penurunan pH dari 5 menjadi 4 pada minggu keempat. Uji antibakteri menunjukkan serum wajah dengan kandungan minyak atsiri memiliki aktivitas terhadap Staphylococcus aureus dan Propionibacterium acnes masing-masing dengan diameter pada rentang 10-13,7 dan 8,7-11,7 mm. Aktivitas antibakteri dari serum wajah meningkat seiring dengan meningkatnya konsentrasi kandungan minyak atsiri. Minyak atsiri murni tanpa formulasi dengan variasi konsentrasi 100; 50; 25; 12,5 dan 6,25% juga menunjukkan aktivitas antibakteri terhadap kedua bakteri tersebut dengan rentang nilai daya hambat yaitu 10-16 mm terhadap S. aureus, sementara terhadap P. acnes pada rentang 9-13,3 mm.
Co-Authors Aswandi Aswandi, Aswandi Dewi Sondari Hauli, Latifah Joelianingsih . Kandoko, Isabella Vannessa Pranata Kiswanto Kiswanto Lithioni, Grace Veronica Lukika, Olivia Mahardika, Dimas Mailani, Putri Julpa Marissa Angelina Marselius Sampe Tondok Mawarni, Rista Siti Muryanto Ndruru, Sun Theo C. L. Nurfauziyah Nurhani Aryana, Nurhani Nurhayati Nurhayati Ogino, Chiaki Prayudi, Satrio Dhiaputra Putri, Agmi Sinta Putri, Reza Audina Ritbey Ruga Rusumayanti, Felli Septiyanti, Melati Setyawati, Avi Waras Sofa Fajriah Sofyan, Muhammad Ihsan Suciati, Fuzi Susi Sulistia, Susi Swandari Paramita Triana Dewi, Rizna Widya FATRIASARI Witta Kartika Restu