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All Journal BERKALA SAINSTEK Indonesian Chimica Letters Journal of The Indonesian Society of Integrated Chemistry
Kedang, Yohana Ivana
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Mathematics Physics

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Study on Utilizing Oil Palm Empty Fruit Bunch Waste into Carbon Nanodots Anindita, Faradisa; Naani, La; Permana, Dian; Karelius, Karelius; Kedang, Yohana Ivana
Journal of The Indonesian Society of Integrated Chemistry Vol. 16 No. 2 (2024): Journal of The Indonesian Society of Integrated Chemistry
Publisher : Pendidikan Kimia FKIP Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jisic.v16i2.38583

Abstract

This investigation introduces a proficient synthesis of carbon nanodots (CND) utilizing empty fruit bunches (EFB) as an environmentally friendly and economical carbon precursor. The synthesis method involves a combination of pyrolysis and hydrothermal. The optical and physicochemical properties of CND were investigated through X-ray diffraction (XRD), Fourier Transform Infrared (FTIR), Transmission Electron Microscopy (TEM), Particle Size Analysis (PSA), UV-visible, and fluorescence spectroscopy. The CND exhibit a spherical morphology, as confirmed through TEM imaging, with an amorphous structure. Size distribution analysis reveals a predominant particle size range between 3.8 and 4.8 nm, and an average diameter of 4.5 nm. Additionally, these CND demonstrated excellent aqueous dispersibility and exhibited fluorescence emission dependent on excitation. The synthesis procedure utilized a simple method, efficiently converting waste materials into valuable end products.
Utilization of Windu Shrimp Shell Waste from Malaka-NTT for Chitosan Synthesis: Characterization Study and Application Potential Kedang, Yohana Ivana; Oktavianawati, Ika; Tea, Marselina Theresia Djue
BERKALA SAINSTEK Vol. 12 No. 4 (2024)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v12i4.52637

Abstract

Chitosan is a non-toxic and biodegradable polymer compound. Chitosan is widely applied in various industrial fields. This research uses shrimp shell waste from the Malaka-NTT as a chitin and chitosan production source. Chitosan synthesis consists of three steps, namely deproteination, demineralization and deacetylation. Chitosan characterization includes determining the degree of deacetylation (DD), determining functional groups using Fourier Transform Infra-Red (FTIR), and measuring crystallinity using X-ray diffraction (XRD). The DD results obtained were 83.7%. The FTIR spectra results of the chitosan samples in this study showed a typical peak at absorption of 1648 cm-1 indicating the vibration of the C=O group in NHCOCH3 (amide) I and absorption of 1589 cm-1 indicating the vibration of the N-H bending group (amide II). The results of the XRD diffractograms on the chitosan sample show an orthorhombic crystal structure with two typical peaks, namely at angles 2θ = 10.12° and 2θ = 19.87°. The DD results obtained in this study indicate that the chitosan produced has a fairly high amine group content, so chitosan as a biomaterial has the potential to be applied in various pharmaceutical and biomedical fields because it has environmentally friendly, biocompatible, and biodegradable properties. Therefore, based on the results of the DD calculation and the characterization of the FTIR and XRD instruments in this study, it shows that the synthesis of chitosan from the utilization of tiger shrimp shell waste from Malaka Regency-NTT has been successfully carried out.
The Volatile Compound Profiles of Fire-Cured and Fermented Na-Oogst Tobacco Leaves (Nicotiana tabacum L.) and Its In-Silico Study Oktavianawati, Ika; Wulandari, Ulfa; Winata, I Nyoman Adi; Ridho, Atok Ainur; Kedang, Yohana Ivana; Fauziah, Dina Trianggaluh; Yusro, Fatimah
Indonesian Chimica Letters Vol. 4 No. 1 (2025)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/icl.v4i1.5995

Abstract

Na-Oogst tobacco is one of the local commodities of Jember, which has been widely used as a raw material for making cigarettes. Product diversification in processing tobacco leaves is very necessary to reduce the danger caused by cigarette consumption. It is also an effort to empower and save the economy of tobacco farmers. Tobacco leaf’ essential oil could be an alternative in maintaining tobacco production. The purpose of this study is to determine the profile (yield and chemical compounds) of Na-Oogst tobacco leaf essential oil content in pre- and post-fermentation. Extraction of essential oils is carried out by two methods, i.e., steam distillation and maceration. The results showed that the extraction from the maceration method produced higher yields than from steam distillation, while the extract from tobacco leaves before fermentation was lower than that after fermentation. The major identified compounds found in tobacco leaves from GC-MS analysis are neophytadiene, nicotine, ledol, phytol, and solanone. Neophytadiene is suggested as a marker compound in tobacco leaf since it is present in all extracts and essential oils in significant amounts, about 23.72-67.37% of the total identified compounds. Further molecular docking of neophytadiene against the D2 dopamine receptor is also investigated in this study.
Co-Authors Dian Permana Faradisa Anindita Fauziah, Dina Trianggaluh I Nyoman Adi Winata Ika Oktavianawati Karelius, Karelius La Na’ani Ridho, Atok Ainur Tea, Marselina Theresia Djue Wulandari, Ulfa Yusro, Fatimah