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All Journal Indonesian Journal of Pharmaceutical Science and Technology Communications in Science and Technology JURNAL REKAYASA KIMIA & LINGKUNGAN
Sulaeman, Uyi
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Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Energy Engineering Medicine & Pharmacology

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Formulasi dan Karakterisasi Nanopartikel Supernatan Bacillus subtilis dengan Poly Lactic-co-Glycolic Acid (PLGA) Kurniawan, Dhadhang Wahyu; Farahnida, Alfia Nayudia; Sulaeman, Uyi
Indonesian Journal of Pharmaceutical Science and Technology Vol 11, No 3 (2024)
Publisher : Indonesian Journal of Pharmaceutical Science and Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/ijpst.v11i3.46594

Abstract

Pemanfaatan supernatan Bacillus subtilis kini telah banyak dimanfaatkan dalam bidang kesehatan sebagai probiotik karena mengandung senyawa bakteriosin serta enzim enzim. Senyawa tersebut mampu menghambat mikroorganisme lain dan mudah terdegradasi oleh enzim proteolitik. Pemanfaatan nanopartikel polimer cukup efektif untuk melindungi probiotik dari kondisi gastrointestinal. Penelitian ini bertujuan untuk membuat sediaan nanopartikel supernatan B. subtilis dengan pembawa PLGA dan dilakukan karakterisasi. Nanopartikel dibuat dengan metode solvent evaporation menggunakan variasi konsentrasi PLGA. Hasil karakterisasi nanopartikel supernatan B. subtilis memiliki ukuran nanopartikel 545,45 ± 90,73 nm dengan nilai indeks polidispersitas (PDI) kategori monodisperisi yaitu 0,503 ± 0,065 dan zeta potensial -14,57 ± 3,08 mV. Morfologi yang dihasilkan berbentuk sferis dan cukup seragam. Analisis Fourier transform infrared spectroscopy (FTIR) menunjukkan pita-pita spektrum mirip dengan nanopartikel PLGA dan menunjukkan beberapa puncak spesifik supernatan B. subtilis dengan sedikit pergeseran. Analisis Differential Scanning Calorimetry (DSC) pada termogram tidak menunjukkan adanya puncak endotermik dari supernatan B. subtilis. Formulasi nanopartikel supernatan B. subtilis telah ter-loading-kan ke dalam sistem nanopartikel melalui analisis FTIR dan DSC.
Modification of Ag3PO4 surface using a nanosilver solution prepared under sunflower seed extract Azmi, Vania Amelia; Sulaeman, Uyi; Larasati, Rini; Hermawan, Dadan; Asnani, Ari; Isnaeni, Isnaeni; Yin, Shu
Communications in Science and Technology Vol 10 No 1 (2025)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.10.1.2025.1642

Abstract

Designing new properties of Ag3PO4 photocatalysts is challenging as the Ag3PO4 surface is highly susceptible to photocorrosion. This study aims to improve the properties of Ag3PO4 by modifying its surface using a nanosilver solution prepared under sunflower seed extract. This photocatalyst was prepared by chemical coprecipitation. Based on XPS analysis, the interaction of nanosilver solution with the Ag3PO4 surface significantly affected the P 2p chemical state and decreased the Ag/P atomic ratio of Ag3PO4. The modification of the Ag3PO4 surface by nanosilver solution resulted in the formation of silver vacancy defects and the incorporation of Ag nanoparticles (AgNPs) on the Ag3PO4 surface. This new design of Ag3PO4 showed a remarkable photocatalytic reaction for Rhodamine B oxidation and antibacterial activity under blue light irradiation. The photocatalytic reaction was mainly driven by forming superoxide anion radicals and hole species. This phenomenon can provide a new direction in the improvement of the photocatalytic ability of Ag3PO4 through a natural plant material approach.
Synthesis and characterization of nanoemulsion of citronella oil (Cymbopogon Nardus L. Rendle) and its Sunscreen Potential Evaluation Rastuti, Undri; Sulaeman, Uyi; Widyaningsih, Senny; Khalidah Zia, Sity; Aditya Mahendra, Ryan
Jurnal Rekayasa Kimia & Lingkungan Vol 17, No 1 (2022): Jurnal Rekayasa Kimia & Lingkungan (June, 2022)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v17i1.23077

Abstract

AbstractCitronella (Cymbopogon nardus L. Rendle) essential oil contains active compounds such as antioxidants and has the potential to be developed as a sunscreen. Nanoemulsion is a water and oil dispersion stabilized by a surfactant layer and has a particle size below 100 nm. This study described the formulation, characterization of citronella oil nanoemulsions, and determination of their activity as a sunscreen through the SPF values. The nanoemulsion formulation was made with 3 variations of oil concentration: F1 (1%), F2 (3%), and F3 (5%). The results of the organoleptic test were following the standards which were clear and no phase separation occurred. In addition, the pH value of the 1%, 3%, and 5% prepared nanoemulsions were categorized as safe to be used on the skin. The prepared formulas were categorized as O/W nanoemulsion types. The viscosity values were found to be 12.76, 25.13, and 84.05 cP respectively. Furthermore, the percent transmittance values were 98.4, 98.9, and 99.9%. The particle sizes, respectively, were 9.4 (100%), 10.07 (97%), and 8.96 nm (82.5%). The centrifugation and freeze-thaw cycle tests showed good physical stability. The results of the sunscreen potential test of the 1%, 3%, and 5% citronella oil nanoemulsion showed SPF values of 1.03, 1.13, and 1.14 with %Te values of 77.42, 70.21, and 67.86% respectively, and %Tp values of 95.94, 94.04, and 93.61% respectively.Keywords:Citronella essential oil (Cymbopogon nardus L. Rendle), nanoemulsion, antioxidant, sunscreen, SPF.
Co-Authors Aditya Mahendra, Ryan Ari Asnani Azmi, Vania Amelia Dadan Hermawan, Dadan Dhadhang Wahyu Kurniawan Farahnida, Alfia Nayudia Isnaeni Isnaeni Khalidah Zia, Sity Larasati, Rini Senny Widyaningsih Undri Rastuti Yin, Shu