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All Journal HAYATI Journal of Biosciences Jurnal Ilmu Tanah dan Lingkungan (Journal of Soil Science and Environment) VALENSI Jurnal Bios Logos CHEMISTRY PROGRESS JURNAL KIMIA SAINS DAN APLIKASI JURNAL TEKNOLOGI LINGKUNGAN IPTEK Journal of Proceedings Series Jurnal Riset Kimia SEMIRATA 2015 Jurnal Kimia Mulawarman IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Science and Technology Indonesia Jurnal Penelitian Sains Chimica et Natura Acta Indonesian Journal of Pure and Applied Chemistry Sains Natural: Journal of Biology and Chemistry Jurnal Tanah dan Iklim
Charlena
Departemen Kimia,Fakultas Matematika Dan Ilmu Pengetahuan Alam, Institut Pertanian Bogor Kampus IPB Dramaga Jl.Agatis Wing 2 Level 4, Bogor 16144, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Education Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics

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Synthesis and Characterization of Fluorapatite-Copper(II) Oxide with Sol-Gel Method as an Antibacterial Biomaterial Manasye Erlangga; Charlena Charlena; Irma Herawati Suparto
Jurnal Kimia Sains dan Aplikasi Vol 27, No 4 (2024): Volume 27 Issue 4 Year 2024
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.27.4.174-181

Abstract

One of the calcium phosphate compounds that can be used as an antibacterial material for coating dental implants is fluorapatite (FAp). This research aims to synthesize FAp at three different sintering temperatures (600, 800, and 1000°C), copper(II) oxide (CuO), and fluorapatite-copper(II) oxide (FAp-CuO) using the sol-gel method, and test the antibacterial properties of the synthesized products. The sol-gel technique proved successful in synthesizing FAp, with optimal results observed at a sintering temperature of 1000°C, achieving a crystallinity level of 90%. Analyses conducted using X-ray diffractometer, Fourier-transform infrared spectrometer, and scanning electron microscope-energy dispersive X-ray spectrometer revealed FAp as the dominating phase, exhibiting Ca/P and P/F ratios of 1.84 and 4.67, respectively. In FAp-CuO, replacing Ca2+ with Cu2+ ions lowered the average crystallite size, crystallinity, and Ca/P ratio. FAp, CuO, and FAp-CuO all displayed antibacterial activities against S. aureus and E. coli, with FAp-CuO having the maximum average inhibitory zone diameters of 0.243 and 1.397 mm, respectively.
Synthesis and Characterization of Copper(II) Oxide (CuO-NP) Nanoparticles using Chemical Precipitation Method Charlena Charlena; Sri Sugiarti; Dila Ardiansyah
JURNAL KIMIA MULAWARMAN Vol 21 No 2 (2024)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jkm.v21i2.1260

Abstract

This study aims to optimize the calcination temperature and see the effect of adding surfactant on the bandgap, particle size, crystallinity level of CuO nanoparticles (CuO-NP), and the activity of CuO nanoparticles as an antibacterial agent. CuO-NP was successfully synthesized using the chemical precipitation method with variations in calcination temperature of 400, 600, and 800 °C with NaOH as a precipitating agent. The synthesized nanoparticles were further characterized using a UV-Vis, XRD, and SEM-EDX spectrophotometer. The value of the CuO-NP bandgap increases with increasing temperature. The bandgap gets bigger when the absorbance value gets smaller. Increasing the calcination temperature causes the crystal size of CuO-NP to become larger. The best level of crystallinity of CuO-NP was obtained at 68,31% with a calcination temperature of 600 °C. Adding 1% PVP did not significantly prevent agglomeration between CuO-NP particles, thereby increasing the size of CuO-NP particles. Keywords: bandgap, CuO-NP, PVP, temperature
Synthesis and Characterization of ZnO/Cellulose Acetate Composite and its Activity as Antibacterial Agent Khefanny, Yemima Chellyne; Charlena; Sugiarti, Sri
Science and Technology Indonesia Vol. 9 No. 2 (2024): April
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2024.9.2.215-223

Abstract

Cellulose is an abundant natural polymer that can be applied in various fields. Cellulose has many types and derivatives, one of which is cellulose acetate. Cellulose can be obtained from various natural sources such as kepok banana peel. The a-cellulose content in kepok banana peel is high enough at 94% so that it can be utilized as a cellulose acetate raw material. Modification of cellulose acetate using antibacterial agents is needed, considering that cellulose does not have antibacterial properties. Metal oxide materials such as ZnO nanoparticles are used as antibacterial agents. This study added ZnO nanoparticles to cellulose acetate and tested its antibacterial activity. The characteristics of ZnO were analyzed by UV-Vis, PSA, and FTIR. The characteristics of cellulose acetate and composites were analyzed by FTIR and XRD. Antibacterial activity tests were performed on all samples. The results showed the band gap value of ZnO was 3.37 eV. The average size of ZnO nanoparticle distribution using PSA was 96.23 nm with an average PI value of 0.151. An indicator that the ZnO compound and cellulose acetate have been sucessfully mixed is the absorption band at wave number 488 cm−1. A composite crystal size of 24.14 nm and a crystallinity percentage of 34.05% were found using XRD data. S. aureus bacteria are more inhibited by all evaluated substances antibacterial properties than E. coli germs. ZnO/Cellulose Acetate composite is categorized as strong inhibition, while ZnO nanoparticles are categorized as medium inhibition.
Phytoestrogens Therapy for Osteoporosis Treatment Using Indonesian Medicinal Plants: A Brief Review Sianipar, Rut Novalia Rahmawati; Iswantini, Dyah; Charlena, Charlena; Wahyudi, Setyanto Tri; Prasetyo, Joni
Science and Technology Indonesia Vol. 9 No. 4 (2024): October
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2024.9.4.949-964

Abstract

A problematic bone remodeling cycle is known to produce more osteoclasts than osteoblasts, making bones more fragile and this condition shows osteoporosis. In this context, estrogen deficiency in the human body is associated with the regulation of osteoporosis. Therefore, this study aimed to investigate the knowledge about basic concepts of bone, osteoporosis, phytoestrogens, and Indonesian medicinal plants for osteoporosis treatment. Data were obtained from literature on various databases including Science Direct, Wiley Online Library, Scopus, Pubmed, and Google Scholar. Adequate therapy is needed to increase estrogen content and an effective approach is to consume medicinal plants that contain phytoestrogens, which have identical structure and activity to human estrogen (17β-estradiol). The results showed that there were observations comprising in vitro, in vivo, and in silico studies on 18 Indonesian medicinal plants as antiosteoporosis treatments. The Leguminosae or Fabaceae family, which has a significant amount of isoflavones (the primary group of phytoestrogens) was found to dominate as an antiosteoporosis agent. Therefore, the development of phytoestrogens therapy from Indonesian medicinal plants must be implemented for the future treatment of osteoporosis.
Synthesis of Iron Nanoparticle Using Polyphenol Bioreductor from Red Pomegranate Extract Aditya, Muhammad Hafizh; Sugiarti, Sri; Charlena
JURNAL SAINS NATURAL Vol. 14 No. 3 (2024): Sains Natural
Publisher : Universitas Nusa Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31938/jsn.v14i3.719

Abstract

Nano zero valent iron (nZVI) has been utilized for environmental remediation and raw water treatment. The NaBH4 reductor, utilized in iron nanoparticle synthesis, yielded easily oxidized and agglomerated material. Using polyphenol as a bioreductor resulted in a more stable material. The purpose of this research is to synthesize and compare quality of nZVI utilizing NaBH4 (C-nZVI) to nZVI utilizing polyphenol from spent tea and the peel of pomegranate (G-nZVI) and determine the efficiency of pomegranate peel G-nZVI in reducing dissolved organic matter. The iron nanoparticle was synthesized by reducing FeCl3 salt in a water solvent. C-nZVI material was generated as a black powder, whereas G-nZVI materials were black flakes. The band gap energy values of these three materials indicate that they have reached the nanoscale. All three materials had entire nZVI unitary groups based on its FTIR spectrums. The X-ray diffractogram did not clearly show the core of the phase crystals. The G-nZVI from the peel of pomegranate had a greater distribution and mean material size than the spent tea G-nZVI. Both zeta potentials G-nZVI demonstrate that the materials were stable in the aqueous medium. After two hours of incubation, G-nZVI pomegranate peel at room temperature and dark conditions achieved an optimal dissolved organic matter breakdown rate of 98%.
Synthesis and Characterization of ZnO with Calcination Temperature Variation and Surfactant Addition using Chemical Coprecipitation Method Charlena, Charlena; Sugiarti, Sri; Khefanny, Yemima Chellyne
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 9, No 3 (2024): October 2024
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v9.i3.123

Abstract

This study aims to synthesize ZnO using the coprecipitation method and characterize it using various instrumentation techniques. The calcination temperature variation treatment was carried out to produce particles with good size and crystallinity levels. Adding polyvinyl pyrrolidone (PVP) surfactant during the synthesis of ZnO aims to prevent agglomeration. ZnO characterization used ultraviolet-visible spectroscopy (UV-Vis), X-ray diffraction (XRD), Fourier transform spectroscopy (FTIR), and scanning electron microscopy (SEM). The result showed that the value of the ZnO band gap increased with increasing temperature. ZnO synthesized at a calcination temperature of 800 °C has a hexagonal wurtzite structure. The crystal size of ZnO is 45.64 nm, while ZnO-PVP's is 40.37 nm. The best ZnO crystallinity level is 61.34%. The FTIR spectrum shows ZnO absorption in the fingerprint region (525 cm-1). SEM micrographs showed that ZnO without the addition of PVP agglomerated. The synthesized ZnO has an antibacterial activity, indicated by forming an inhibition zone (7.84 mm
Synthesis and Characterization of Hydroxyapatite Composites Based on Tutut (Belamya Javanica) and Magnetite by Coprecipitation as Adsorbents of Pb Metals Ion Charlena; Nazriati; Marita Soebrata, Betty; Dicky Iswara, Muhammad
Science and Technology Indonesia Vol. 10 No. 1 (2025): January
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2025.10.1.111-122

Abstract

Increased industrial activity can result in the emission of pollutants into the environment, such as heavy metals, which are a significant source of concern. A practical approach to reduce this problem is to utilize Pb metal adsorption. This study aims to synthesize HAp from Bellamya javanica clam shells and characterize the HAp-Fe3O4 composite as a Pb metal ion adsorbent. FTIR and XRD analysis results showed the successful fabrication of the composite, resulting in a crystal dimension of 7.63 nm and a crystallinity level of 84.80%. SEM characterization showed a porous structure with a particle size of 10.98 um. Adsorption studies of Pb(II) ions showed that the HAp-Fe3O4 composite efficiently adsorbed Pb(II) ions, with the adsorption efficiency increasing from 95.80% to 98.40%. The adsorption isothermal model of the HAp-Fe3O4 composite follows the Freundlich model with a 1/n value of 0.31 and a KF value of 25.35 L/g. The adsorption kinetics study of the HAp-Fe3O4 composite follows the pseudo second-order model with an R2 value of 1, and the thermodynamic study shows the Gibbs free energy is negative, which indicates that the adsorption process is thermodynamically optimal and spontaneous. In addition, the enthalpy value is positive, indicating that the interaction between the adsorbent and lead ions is endothermic, and the entropy is negative, indicating the reduction of random collisions of lead ions in the solid (adsorbent) and aqueous solution during adsorption.
Biodegradation of the Ciprofloxacin Antibiotic by White Rot Fungus Trametes hirsuta D7 Ananda Novita Hi Pattu; Charlena Charlena; Dede Heri Yuli Yanto; Irma Herawati Suparto; Maulida Oktaviani
Jurnal Kimia Sains dan Aplikasi Vol 27, No 12 (2024): Volume 27 Issue 12 Year 2024
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.27.12.590-596

Abstract

This study highlights the potential of fungal microorganisms, particularly Trametes hirsuta D7, in addressing antibiotic contaminants, such as ciprofloxacin, in the environment. The degradation process was conducted at room temperature over 7 days, and the results demonstrated that laccase was predominant in the degradation capacity; this was evidenced by the laccase enzyme activity levels obtained, namely 93 U/L, 120 U/L, and 130 U/L, compared to manganese peroxide activity of 7 U/L, 16 U/L, and 13 U/L at concentrations of 100, 300, and 500 mg/L, respectively. Notably, the laccase enzyme of T. hirsuta D7 exhibited significant degradation of ciprofloxacin, with high degradation rates of 64% at 100 mg/L, 48% at 300 mg/L, and 26% at 300 mg/L. This indicates that laccase from T. hirsuta D7 effectively degraded ciprofloxacin at various concentrations. Furthermore, this study revealed that ciprofloxacin did not significantly affect the growth of T. hirsuta D7. This suggests that microorganisms can survive and function effectively in the presence of antibiotic contamination without being impaired by these compounds. In conclusion, this study presents a potential solution for environmental antibiotic contamination by utilizing fungal microorganisms, particularly T. hirsuta D7, and their laccase enzymes. The findings of this study provide valuable insights for developing more environmentally sustainable and efficient degradation methods for antibiotic contamination in the ecosystem.
Coating of Ti-6Al-4V Metal Alloys Nanotube with Hydroxyapatite-Gelatin-Polyvinyl Alcohol Composites using the Dip-Coating Methods Charlena, Charlena; Wahyudi, Setyanto Tri; Nurmawan, Cucu Putri
Chimica et Natura Acta Vol 13, No 1 (2025)
Publisher : Departemen Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cna.v13.n1.57959

Abstract

The Ti-6Al-4V metal alloy is an implantable material because of its strength, lightweightness, and corrosion resistance properties. Metal alloy surfaces need to be modified to improve corrosion resistance. Therefore, the study aims to modify the surface of Ti-6Al-4V metal alloys to form nanotube structures and to coat the hydroxyapatite composite (HAp)-gelatin-PVA in Ti-6Al-4V metal alloys. Nanotubes were formed by anodizing methods in an ethylene glycol-H2O (9:1) solution containing 0.6% NH4F at 20V for 3 hours. The result of SEM showed that the diameter of the nanotube hole is about 30−40 nm and that it is formed homogeneously. The result of coating nanotube metal alloys with composite HAp-gelatin-PVA is that they are evenly distributed and thicker. The morphology of a homogeneous small granule composite coating composite. The X-ray diffraction showed shows that the composite HAp-gelatin-PVA crystalline size coated on nanotube metal alloy is smaller than that of non-nanotube. Nanotube Ti-6Al-4V coated metal alloy with HAp-gelatin-PVA composites had shows poor bioactivity that had not beenand thus not able to increase the corrosion resistance of Ti-6Al-4V metal alloys.
Synthesis and Antibacterial Properties of Fluorapatite and FAp-ZnO-Chitosan Composite as Dental Implant Materials Charlena; Khofiyatuzziyadah, Alif Aryan; Akhiruddin; Purwantiningsih
Science and Technology Indonesia Vol. 10 No. 2 (2025): April
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2025.10.2.562-573

Abstract

Regenerative biomaterials research has continued to grow in recent decades, one of which is dental implants. The material that can be used is fluorapatite (FAp), as it is a significant element of human bones and teeth. FAp has better chemical and thermal stability than other apatite materials. However, FAp has low antibacterial properties, so it needs to be composited with other antibacterial materials, such as zinc oxide (ZnO) and chitosan. In addition, chitosan was also added to stabilize FAp and ZnO an effort to increase antibacterial and in vitro bioactivity in apatite formation. Therefore, this research intends to synthesize and assess the antibacterial properties and in vitro bioactivity of FAp-ZnO chitosan to increase its potential as a dental implant manufacturing material. FAp and ZnO were synthesized and then composited with chitosan into FAp-ZnO-chitosan by a simple mixing method. The FAp-ZnO-chitosan composite was successfully synthesized by looking at X-ray diffraction (XRD), Fourier Transform Infra-Red (FTIR), and Scanning Electron Microscope-Energy Dispersive X-ray (SEM EDX) characterization results. The in vitro bioactivity of the composite showed new surface growth during immersion with simulated body fluid (SBF) solution, indicating potential attachment of the implant material to the tissue. The antibacterial properties of FAp-ZnO-chitosan also showed an increased zone of inhibition compared to the single material. This indicates that the FAp-ZnO-chitosan composite material has the potential to be used as a dental implant material.
Co-Authors Aditya, Muhammad Hafizh Agung Dhamar Syakti Ahmad Syahreza Akhiruddin Akhiruddin Maddu Aldes Lebani Ananda Novita Hi Pattu Armi Wulanawati Aslihati Aslihati Chonny Damayanti Daniel Putra Oktavianus Laia Dede Heri Yuli Yanto Dicky Iswara, Muhammad Dila Ardiansyah Dyah Iswantini Hanies Ambarsari Henny Purwaningsih Ida Ayu Putu Sri Widnyani Irma Herawati Suparto Irma Herawati Suparto Irma Herawati Suparto Iswandi Anas Iswandi Anas J. SRI ADININGSIH Joni Prasetyo, Joni Khefanny, Yemima Chellyne Khofiyatuzziyadah, Alif Aryan L.I NURHAYATI LADY R. WIDOWATI Manasye Erlangga Marita Soebrata, Betty Mas?ud, Zainal Alim Maulida Oktaviani Moch. Irgham Zuhfria Moh. Yani Nazriati Nazriati dkk. Niken Dyah Wanodyanti Nurmawan, Cucu Putri Nurul Afiati Aflakhah Purwaningsih, Henny Purwantiningsih Ravena Ravena Rosdiana, Tina S. SRI DWININGSIH Setyanto Tri Wahyudi Sianipar, Rut Novalia Rahmawati Sulistioso Giat Sukaryo Susi Sulistia, Susi Tatang Hidayat Tetty Kemala Tina Rosdiana Wisaeni Intannia Wulan Islamia Yadi Setiadi Yadi Setiadi Yessie Widya Sari Zainal Alim Mas'ud Zainal Alim Mas’ud