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All Journal Zuriat Jurnal Ilmu Dasar e-Journal Pustaka Kesehatan BERKALA SAINSTEK Indonesian Journal of Agricultural Science Jurnal Ilmu-Ilmu Peternakan (Indonesian Journal of Animal Science) The Journal of Pure and Applied Chemistry Research UNEJ e-Proceeding Jurnal Abdi: Media Pengabdian Kepada Masyarakat Indonesian Chimica Letters InSTEM
Ika Oktavianawati
Jurusan Kimia Fakultas Matematika Dan Ilmu Pengetahuan Alam Universitas Jember
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Education Health Professions Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Social Sciences Other

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KARAKTERISASI DAN PENENTUAN KOMPOSISI ASAM LEMAK DARI HASIL PEMURNIAN LIMBAH PENGALENGAN IKAN DENGAN VARIASI ALKALI PADA PROSES NETRALISASI Ratih, RD; Handayani, Wuriyanti; Oktavianawati, Ika
BERKALA SAINSTEK Vol 4 No 1 (2016)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Telah dilakukan pemurnian limbah dari pengalengan ikan dengan menggunakan variasi basa alkali. Alkali yang digunakan adalah KOH dan NaOH dengan masing konsentrasi 10 0Be, 140Be, 180Be. Tahap pemurniannya meliputi degumming, netralisasi, dan bleaching. Minyak dari hasil pemurnian dikarakterisasi sifat fisik dan kimia, serta ditentukan komposisi asam lemaknya menggunakan GC-MS. Dari karakteristik fisik dan kimia diketahui bahwa NaOH dengan konsentrasi 18 0Be dapat menghasilkan minyak dengan mutu yang paling baik yakni kadar ALB 0,89%, bilangan perosida 7,06 mgO 2/100g, bilangan iod 114 mg/100g, bilangan penyabunan 102, titik keruh 65,4 0C, asam lemak jenuh sebesar 34,32% dan asam lemak tak jenuh sebesar 40,98%.
The Application of Distillation Technology of Rhizomes Essential Oils in TOGA Community of Sari Hutani in the Border Area of Meru Betiri National Park Oktavianawati, Ika; Winata, I Nyoman Adi; Aji, Joni Murti Mulyo
Jurnal Inovasi Sains dan Teknologi untuk Masyarakat Vol. 2 No. 2 (2024): November
Publisher : Faculty of Mathematics and Natural Sciences, University of Jember. Jl. Kalimantan No.37, Krajan Timur, Jemberlor, Kec. Sumbersari, Jember Regency, East Java 68121

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/instem.v2i2.1510

Abstract

The TOGA Sari Hutani group has been actively producing traditional herbal medicine using basic ingredients of rhizomes harvested from their gardens. The problem faced by the TOGA group is that the existence of post-harvest rhizomes cannot last well for up to 2-3 months. Meanwhile, the rhizomes used as herbal medicine products have exceeded capacity, especially because consumers and marketing are still limited. According to this, the community service program team from the University of Jember proposed a product diversification from rhizomes in the form of essential oils. This product has a higher selling value and a longer shelf life than traditional herbal medicine products. Essential oil distillation technology has been applied through various activities, such as counselling, distillation practices, mentoring, and monitoring of essential oil production. The Al Kaff essential oil trader, as the second partner in this community service program, is also actively present to provide mentoring regarding essential oil product standards on the market and agreed to become an agent for collecting essential oil products produced by the Sari Hutani group.
Isolation and Transformation of Tefrosin From The Seed of Tephrosia Vogelii With SelectfluorTM Yulvia, Ana; Hermawati, Elvira; Danova, Ade; Oktavianawati, Ika; Reza, Muhammad
Indonesian Chimica Letters Vol. 3 No. 2 (2024)
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.v3i2.4274

Abstract

In this study, tefrosin (1), a known phenolic compound, was successfully isolated and identified from the seed extract of Tephrosia vogelii. The structure of this compound was determined based on 1D and 2D NMR spectroscopy. Furthermore, the isolated compound was transformed using 0.5 equivalent of selectfluor™ in acetonitrile solvent at 100 oC for 3 hours. The reaction product, namely dehydrotephrosine (2), is new reaction product from selectfluor™ reagent as a catalyst in tertiary alcohol dehydration in aromatic group. This finding highlights the effectiveness of selectfluor™ as a catalyst in dehydration reactions, demonstrating its potential to introduce new chemical properties to compounds. The study underscores the versatility of selectfluor™ and its ability to facilitate the generation of valuable derivatives from phenolic compounds. These results provide insights into the reactivity of tefrosin and offer a new approach for chemical transformations involving phenolic substrates.
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 Influence of Cellulose Acetate Concentration for Ultrafiltration Membranes Apriliasari, Yekti; Indarti, Dwi; Oktavianawati, Ika; Piluharto, Bambang
Indonesian Chimica Letters Vol. 2 No. 2 (2023)
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.v2i2.5618

Abstract

Separation process using a membrane is a common method used in many fields. The objective of this research is to find out the influence of polymer concentration on the physical properties and performance of cellulose acetate as an ultrafiltration membrane. The cellulose acetate membrane is made by phase inversion technique. This technique is carried at by dissolving cellulose acetate in a range of concentration (18%, 19%, 20%, 21%, and 22%) in the solvent (acetone/DMSO = 15%/60%) and DMP as additives (3% mL). Then the mixtures homogenized and added PEG400 for 10% of cellulose acetate concentration (% w/w), strired ± 12 hours left in place until the buble disappeared. Then the dope solution is printed the glass plate, evaporated for 3 minutes, and immersed in a coagulation bath containing 5% acetone. The results suggest that the greater the concentration of cellulose acetate membrane increase the number density while the swelling degree decrease. The performance of the membrane showed that the greater concentration of cellulose acetate will water of flux the membrane decrease and rejection coefficient increase. Cellulose acetate membrane by varying the concentration of 21% and 22% included in the classification of ultrafiltration membranes for rejection coefficient value (90,37% and 91,43%) 90% may rejection by a membrane.
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 . Ifada AA Sudharmawan, AA Achmad Sjaifullah Ade Danova Adi Winata, I Nyoman Anita Karolina, Anita Apriliasari, Yekti Arifulloh, Arifulloh Ayik Rosita Puspaningtyas1 Bambang Piluharto Bambang Sugiharto Bambang Sugiharto Citra, Priscillia Djenal . Djenal Djenal Dwi Indarti Elis Nur Farida, Elis Nur Fauziah, Dina Trianggaluh Hermawati, Elvira I Nyoman Adi Winata Joni Murti Mulyo Aji Kedang, Yohana Ivana Letisya, Nanda Meirinda Hermiastuti Meirinda Hermiastuti, Meirinda Muhammad Reza Nanda Letitia Ivana Nia Kristiningrum Niken Widya Palupi Novita Rahmawati Novita Rahmawati, Novita Nugraha, Ari Satya Ratih, RD Ridho, Atok Ainur Sattya Arimurti Sholihah, Sovia MW Suharjono Suharjono Tanti Haryati Tea, Marselina Theresia Djue Tri Agus Siswoyo Tri Mulyono Triodora Hutahuruk Untung Murdiyanto Untung Murdiyanto Untung Murdiyanto Utari, Dwi Purwita Wahyu Novandari Herdiyanti Wawan Badrianto Wawan Badrianto, Wawan Wulandari, Ulfa Wuriyanti Handayani Wuriyanti Handayani, Wuriyanti Wuryanti Handayani Yulvia, Ana Yuni Retnaningtyas Yusro, Fatimah Zhentya, Bella J