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All Journal BERKALA SAINSTEK Natural B Jurnal Riset Kimia SC (Savana Cendana) : Jurnal Pertanian Konservasi Lahan Kering Jurnal Penelitian Pendidikan IPA (JPPIPA) Al-Kimia Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Jurnal Saintek Lahan Kering JATI EMAS (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat) Bakti Cendana: Jurnal Pengabdian Masyarakat Jurnal Pasopati : Pengabdian Masyarakat dan Inovasi Pengembangan Teknologi Hydrogen: Jurnal Kependidikan Kimia Jurnal Media Tropika: Jurnal Pengabdian Kepada Masyarakat Jurnal Umum Pengabdian Masyarakat (JUPEMAS) Journal of Chemical Science and Application Jati Emas (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat)
Tea, Marselina Theresia Djue
Universitas Timor
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Veterinary Other

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Eco-Dyeing of Timor Woven Fabrics using Pterocarpus Indicus Bark Tannin as a Natural Mordant Adu, Risna Erni Yati; Fay, Angela Desy Putry; Tea, Marselina Theresia Djue
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 4 (2024): August 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i4.11640

Abstract

Pterocarpus indicus is a tropical wood type containing tannin compounds which potentially to be used as biomordants in woven fabrics dyeing. This research is the first work to determine the color cha racteristics of Timorese woven fabric after using tannin from Pterocarpus indicus bark as a biomordant. This research aims to determine the tannin content and colour properties of Timor woven fabric after using tannin as a a natural mordant. Pterocarpus indicus bark samples were prepared and extracted via hot extraction. The tannins in Pterocarpus indicus stem bark were qualitatively and quantitatively analyzed using FT-IR and UV-Vis Spectrophotometer respectively, then applied as a color binder for woven threads. The color properties of woven fabrics with tannin were compared to woven fabrics treated with Al2(SO4)3 mordant at a concentration of 15%. Color fastness to washing are tested using the Staining Scale Standard. Pterocarpus indicus bark tannin is a brown powder. Qualitative and quantitative tests show that Pterocarpus indicus bark contains tannins with a total concentration of 0.0436%. FTIR spectra exhibited functional groups absorption by the aromatic C-H, O-H, C=C, C-C, C-O-C, and C-O. The use of 15% tannin and curcumin dye produces a yellow-brown woven fabric with a fairly good color fastness value to washing. Pterocarpus indicus bark contains tannin which has potential as a biomordant for natural Timorese weaving dyeing.
Utilization of Local Natural Dyes and Mordants in Dyeing Polyester Yarn for Timor Woven Fabrics: Characterization and Potential Applications Marselina Theresia Djue Tea; Elisabeth Korbafo; Faustinus Kadha; Yohana Ivana Kedang; Fetronela Rambu Bobu; Agustina Mogi; Ernesta Wae; Janrigo Klamegio Mere; Gebhardus Djugian Gelyaman
Jurnal Penelitian Pendidikan IPA Vol 12 No 1 (2026)
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v12i1.11639

Abstract

The objective of this study was to extract natural dyes from plant parts, characterize them, and evaluate their color fastness properties. The yarns were bleached using hydrogen peroxide at a concentration of 10% (based on fiber weight) at 100°C for 30 minutes. Three natural dyes (teak leaves, turmeric, and mango bark) were selected as natural sources for color extraction, which was carried out for 60 minutes at 100°C. Dyeing was performed both with and without the addition of salt, alum, and lime as mordants. The FTIR spectra of fabrics dyed with natural dye extracts showed absorption bands at 2963–2918 cm⁻¹, indicating the presence of C-H stretching from methyl (CH₃) and methylene (-CH₂-) groups found in polyester. The band at 1710–1713 cm⁻¹ originated from the carbonyl (C=O) group, which is a main characteristic of polyester. The band around 1504–1577 cm⁻¹ was identified as aromatic C=C bond stretching. The band at 1338–1242 cm⁻¹ indicated C-O stretching, which may be attributed to ester groups in polyester. The band at 1091–1015 cm⁻¹ represented C-H bending, which is also characteristic of polyester molecules. Turmeric and teak leaves demonstrated better color fastness compared to mango bark.
Introduction and Use of Aloe Vera-Based Edible Coating to Improve the Quality of Cucumber Fruit in the Oemanas Farmer Group Nian Village: Pengenalan dan Penggunaan Edible Coating Berbasis Aloe Vera untuk Peningkatan Mutu Buah Timun di Kelompok Tani Oemanas Desa Nian Risna Erni Yati Adu; Marselina Theresia Djue Tea; Gebhardus Djugian Gelyaman
JATI EMAS (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat) Vol. 9 No. 1 (2025): Jati Emas (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat)
Publisher : DPD Jatim Perkumpulan Dosen Indonesia Semesta

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Abstract

Cucumber is one of the main commodities produced by the Oemanas Farmers Group in Nian Village. So far, the number of cucumbers produced is quite high during harvest time, but often experiences physical damage during transportation and marketing. Due to the limited knowledge and skills of the farmer group members, so far there has been no post-harvest processing and preservation technique. As an effort to reduce this problem, it is necessary to carry out activities to introduce and apply edible coating based on easily accessible materials. Edible coating can control post-harvest damage to cucumbers. This community service activity aims to control damage to cucumbers in partner groups through preliminary survey activities to obtain information related to partner conditions, socialization in the form of lectures followed by interactive discussions between participants and implementers, training in preparation and application of coating suspensions carried out through demonstration activities then continued with independent practice activities by each member of the farmer group. The final activity is an evaluation to measure the achievement of the goals and targets of the activity. The evaluation results showed an increase in partner knowledge about edible coating by 65% ​​of the total participants. In addition, more than 70% of partner members have the skills to carry out the preparation of edible coating suspensions and apply them to the surface of cucumbers through dipping techniques.
Gas Chromatography Method Implementation to Determine Organophosphate Pesticide Residues in Kefamenanu Agricultural Land: Penerapan Metode Gas Chromatography Untuk Menentukan Residu Pestisida Organofosfat Pada Tanah Lahan Pertanian Kefamenanu Marselina Theresia Djue Tea; Elisabeth Korbafo; Pudensia Ririn; Sanci Welmince Bani
JATI EMAS (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat) Vol. 9 No. 1 (2025): Jati Emas (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat)
Publisher : DPD Jatim Perkumpulan Dosen Indonesia Semesta

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Abstract

Pesticides are widely used in agriculture to prevent or control pests and diseases that interfere with or damage agricultural crops. However, excessive and inappropriate use of pesticides on agricultural land in Kefamenanu causes pesticide residues to remain on agricultural products and the environment. In this applied study, organophosphate pesticide residues were determined in agricultural soil with the aim of determining their presence and levels in the soil. The gas chromatography method was used. The analysis results obtained showed the detection of pesticide residues of chlorpyrifos, profenofos, and malathion. The retention time of each pesticide residue was 4.56 minutes, 3.68 minutes, and 3.35 minutes, which were in accordance with the retention time of each standard. The levels of pesticides chlorpyrifos, profenofos, and malathion were 1,817 mg/kg, 0.764 mg/kg, and 0.009 mg/kg, respectively. The results of the study showed that the levels of pesticide residues of chlorpyrifos and profenofos in the soil exceeded the maximum residue limit (MRL) that had been set. The malathion residue levels did not exceed the maximum residue limit. Thus, several recommendations are given that need to be implemented immediately.
Co-Authors Agustina Mogi Akhmad Sabarudin Akhmad Sabarudin Azor Yulianus Tefa Benu, Didi Prasetyo Ceunfin, Syprianus Dira Asri Pramita Eduardus Yosef Neonbeni Elu, Maria Kasilda Ernesta Wae Fallo, Yosefina Marice Faustinus Kadha Fay, Angela Desy Putry Fetronela Rambu Bobu Fransiskus Yulius Dhewa Kadju Gelu, Leonard Peter Gelyaman, Gebhardus Djugian Hanas, Dicky Frengky Hermin Sulistyarti Ika Oktavianawati Janrigo Klamegio Mere Jefry Presson Jefry Presson jefry Presson Kadha, Faustinus Kedang, Yohana Ivana Kolo, Maria Magdalena Korbafo, Elisabeth Lukas Pardosi Mada, Grandianus Seda Maria Imaculata Mali Maria Lilita Guterres Matius Stefanus Batu N. M. Obenu Nensiana Kono Foni, Elfrida Neonbeni, Eduardus Yosef Nugraha K. F. Dethan Pramita, Dira Asri Pudensia Ririn Risna Erni Yati Adu Sanci Welmince Bani Siahaan, Desta Gloria Siahaya, Antho Netty Welsiliana Welsiliana Yakobus Pffeferius Edvend Saba Agu Yohana Ivana Kedang Yunita Bouk