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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Chimica et Natura Acta ALCHEMY Jurnal Penelitian Kimia 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 Abdi Masyarakat Indonesia Jurnal Ilmiah Berkala: Sains dan Terapan Kimia

Gelyaman, Gebhardus Djugian

Universitas Timor

Author-ID : 921148

Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Economics, Econometrics & Finance Education Energy Engineering Environmental Science Materials Science & Nanotechnology Nursing Physics Public Health Social Sciences Other

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Karakterisasi Komposisi Mineral Mud Vulcano Desa Napan Kawasan Perbatasan Republik Indonesia – Republic Democratic Timor Leste dan Potensi Pemanfaatannya Gebhardus Djugian Gelyaman; Eduardus Edi
Chimica et Natura Acta Vol 8, No 2 (2020)
Publisher : Departemen Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cna.v8.n2.29514

Penelitian karakterisasi kimia terhadap lumpur volcano (mud volcano) desa Napan yang merupakan kawasan perbatasan negara Indonesia dan Timor Leste telah dilakukan. Karakterisasi dilakukan menggunakan instrumentasi XRD, FTIR, XRF. Karakterisasi bertujuan untuk mengetahui komposisi mineral-mineral dalam lumpur sehingga dapat mengeksplorasi potensi pemanfaatan lumpur tersebut didasarkan pada studi literatur riset-riset sejenis yang telah dilakukan. Hasil karakterisasi memperlihatkan penyusun lumpur adalah Cr2O3, Re2O7, ZnO, V2O5, Rb2O, CuO, ZrO2, BaO, SrO, MnO, TiO2, CaO, K2O, Al2O3, Fe2O3, SiO2 yang menyusun mineral-mineral besar yaitu kaolinit, gibsit, kuarsa, kristobalit, ilit, hematit, alumina (corundum). Terdapat tiga mineral yang mendominasi kandungan lumpur yaitu SiO2 (52%) dikuti Fe2O3 (±20,55%) dan Al2O3 (± 15,5%). Lumpur tersebut dapat dimanfaatkan untuk berbagai keperluan seperti subtituen semen, adsorben, katalis, sumber silika, zeolite, briket, silika gel dan aerogel.

Faktor – Faktor yang Mempengaruhi Bioavailabilitas Besi bagi Tumbuhan Gebhardus Djugian Gelyaman
Saintek Lahan Kering Vol 1 No 1 (2018): JSLK Juni 2018
Publisher : Fakultas Pertanian, Universitas Timor

Iron plays an important role in plant metabolism, one of which is the forming of chloroplasts. Iron is needed in small amounts but iron deficiency can cause yellow spots on the leaves, indicating failure of chlorophyll formation or known as chlorosis. Therefore, iron becomes an essential element or micronutrients whose existence is absolute must be met by plants. Iron is very abundant in nature found in the form of minerals. However, the availability of iron for plants is very low. The availability of iron is related to the solubility of iron in soil solutions or water in nature. This paper will review factors affecting the availability of iron for plants, including the effects of soil and water pH, the role of bacteria, soil organic matter and the potential reduction of soil or water. Interaction of these factors produces a certain value of pH and reduction potential (E) in water and soil. The resulting iron specimens based on the correlation between the pH value and the environmental redox reaction value can be predicted using the pourbaix diagram of iron in water and soil.

Potensi Ekstrak Tanaman Sebagai Pestisida Alami Di Desa Salu Kecamatan Miomafo Barat Kabupaten TTU Jefry Presson; Gebhardus D Gelyaman; Yohana Ivana Kedang; Sefrinus Maria D. Kolo; Regina Seran; Eduardus Edi; Maria Magdalena Kolo
Bakti Cendana Vol 2 No 2 (2019): Bakti Cendana: Jurnal Pengabdian Masyarakat
Publisher : LPPM Universitas Timor

Devotion with the title of potential plant extracts as natural pesticides in Salu village, Miomafo Barat district, TTU district was held in November 2018. The purpose of this service was to provide knowledge on how to increase food production through eradicating pests, providing knowledge about the advantages of natural pesticides compared to synthetic pesticides, and make soursop leaf extract as a natural pesticide. The main target of this activity is the farmers who are conducted through methods of lecture, brochure distribution, and product manufacturing training. This service activity was conducted in 3 sessions. The first session was socialization of ways to increase food production through eradicating pests. The second session is a socialization of the advantages of natural pesticides compared to synthetic pesticides. Making soursop extract as a natural pesticide is the third session that closes all the series of devotion. In addition to providing questions, farmers also provide personal experiences that are useful for the development of science. The coordination of the making of soursop extract indicates the high enthusiasm of the farmers in Salu village towards this devotion. The final product in this activity is soursop leaf extract which is ready to be applied to plants.

Aplikasi Herbisida Ramah Lingkungan di Desa Kiusili Kecamatan Bikomi Selatan Kabupaten Timor Tengah Utara Gebhardus Djugian Gelyaman; Yolanda Getrudis Naisumu; Aloysius Rusae
Bakti Cendana Vol 3 No 1 (2020): Bakti Cendana: Jurnal Pengabdian Masyarakat
Publisher : LPPM Universitas Timor

Community service has been carried out in the Nek'amnaut farmer group Kiusili village, Timor Tengah Utara district. The dedication was the use of eco-friendly herbicides made from salt, vinegar, water, and liquid soap. The dedication method was socialization and demonstration of making and spraying of the solution on weeds. Pre-service and post-service questionnaires were filled to find out farmer group knowledge of herbicides in general and the ability made environmentally friendly herbicides. The results showed that an eco-friendly herbicide solution has succeeded in killing weeds. Public knowledge changed from the category of not knowing to be well-informed, marked by an increased in the knowledge score (SP) from 24 to 76. The percentage of the number of farmer group members who well-informed changed from 0 to 83%. The ability category was change from unable to be very capable of making the herbicide, marked by the ability score (SK) increased from 0 to 83. The number of farmer group members who can make the herbicide increased from 0 to 89%. The intensity of the use of synthetic herbicides was decreased in the last three years. Five liters of an environmentally friendly herbicide solution killed weed in 48 m2 area.

Pemanfaatan Ekstrak Antosianin dari Limbah Kulit Bawang Merah (Allium cepa) sebagai Zat Pemeka (Sensitizer) pada Dye Sensitized Solar Cell (DSSC) Risna Erni Yati Adu; Gebhardus Gelyaman; Marlince Kabosu
ALCHEMY Jurnal Penelitian Kimia Vol 18, No 1 (2022): Maret
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.18.1.56104.103-111

Fabrikasi DSSC dengan menggunakan sensitizer zat warna sintetik yang mahal dan susah diperoleh dapat diatasi dengan memanfaatkan zat warna alami dari limbah biomassa kulit bawang merah. Penelitian tentang ekstraksi antosianin dari limbah kulit bawang merah (Allium cepa) dan pemanfaatannya sebagai zat pemeka (sensitizer) pada Dye Sensitized Solar Cell (DSSC) telah dilakukan dengan tujuan untuk mengetahui karakteristik warna ekstrak antosianin dalam limbah kulit bawang merah dan potensinya sebagai zat pemeka dalam DSSC. Antosianin dalam limbah kulit bawang merah diekstraksi dengan menggunakan pelarut etanol 95% dengan penambahan asam (ET) dan etanol tanpa penambahan asam (ETT). Ekstrak kulit bawang merah dikarakterisasi serapan warna dan gugus fungsinya dengan Spektrofotometer UV-Vis pada panjang gelombang 200 nm – 800 nm dan Fourier Transform Infrared (FTIR) pada bilangan gelombang 4000 cm-1 – 500 cm-1. Selanjutnya DSSC difabrikasi dan efisiensi DSSC ditentukan melalui perhitungan tegangan dan kuat arus yang terukur oleh multimeter. Hasil karakterisasi warna menunjukkan bahwa ekstrak kulit bawang merah baik dengan pelarut etanol terasamkan dan tidak terasamkan memiliki serapan maksimum pada panjang gelombang UV dengan serapan utama pada panjang gelombang 221, 251, 291 dan 366 nm. Spektrum FTIR ekstrak kulit bawang menunjukkan serapan khas gugus fungsi pada molekul antosianin pada rentang bilangan gelombang 3418 cm-1– 3375 cm-1 untuk gugus –OH, 2842 cm-1 – 2959 cm-1 untuk C–H alifatik, 1635 cm-1 – 1668 dan 714 cm-1 masing-masing untuk C=C dan C–H aromatic, 1040 cm-1– 1091 cm-1 untuk C–O–C dan 1198 cm-1– 1122 cm-1 untuk C–O alkohol. Hasil pengujian efisiensi sel menunjukkan bahwa sel DSSC yang difabrikasi menggunakan ekstrak etanol TT memiliki nilai efisiensi yang lebih tinggi yaitu sebesar 0,0491%.The Application of Anthocyanins Extracts from Red Onion Peel Waste (Allium cepa) as a Sensitizer in Dye-Sensitized Solar Cell (DSSC). DSSC fabrication using synthetic dye sensitizers which are expensive and difficult to obtain can be overcome by utilizing natural dyes from onion peel. Anthocyanin extraction from red onion peel (Allium cepa) and its use as a sensitizer in dye-sensitized solar cells (DSSC) has been investigated. The purpose of this study was to determine the color characteristics of anthocyanin extract in onion peel waste and its potential as a sensitizer. Anthocyanin in onion peel waste was extracted using 95% ethanol as a solvent with acid (ET) and ethanol without acid (ETT). The color absorption and functional groups of onion peel extract were characterized using UV-Vis spectrophotometer at 200 nm – 800 nm wavelength and Fourier Transform Infrared (FTIR) at wavenumber of 4000 cm-1 – 500 cm-1. Furthermore, DSSC was fabricated, and an efficiency value was achieved by calculating the voltage and current measured by the multimeter. Onion peel extract has maximum absorption in acidified and unacidified ethanol at UV wavelengths, with the main absorption at 221, 251, 291, and 366 nm. The FTIR spectrum of onion peel extract shows typical absorption of functional groups in anthocyanin at wavenumbers of 3418 cm-1 – 3375 cm-1 for the –OH group, 2842 cm-1– 2959 cm-1 for aliphatic CH, 1635 cm-1–1668 cm-1, and 714 cm-1 for C=C and C–H aromatics, respectively. The absorption band at 1040 cm-1– 1091 cm-1 and 1198 cm-1 – 1122 cm-1 correspond to C–O–C and C–O alcohol. DSSC cells fabricated using unacidified ethanol extract have the highest efficiency of 0.0491%.

Preparation of Indigo Paste for Natural Dyeing of Timor Woven Fabric in Amol Village, North Central Timor Regency Risna Erni Yati Adu; Marselina Theresia Djue Tea; Gebhardus Djugian Gelyaman; Jefry Presson
Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Vol 6, No 2 (2022): Vol 6, No 2 (2022)
Publisher : Yogyakarta State University

The lack of knowledge and skills of the weaver community in Amol Village, North Central Timor Regency to prepare natural dye from natural resources that are difficult to be found in dry season is the main reason to conduct this service activity. This training was aimed to improve the knowledge and skills of the weaver group and providing them indigo paste as a natural color stock that can be stored and used during dry season. Service activities were carried out through 2 steps, namely counseling and training, which begins with a demonstration by service team and then continues with independent practice while being accompanied by the team. The knowledge of the weaver group to extract natural dyes from natural resources has been improved, as evidenced by the evaluation results. Members of the weaver group became more skilled in preparing indigo paste from Indigofera tinctoria leaves. At the end of the activity, indigo paste products were obtained which were applied to Timor woven fabric.

Permainan Sains Menggunakan Bahan Sederhana bagi Siswa/i SMP Negeri II Koko Kecamatan Kota Kefamenanu, Kabupaten TTU Noviana Obenu; Janrigo Klaumegio Mere; Gebhardus D. Gelyaman; Emilia Juliyanti Bria; Yoseph Satrio Akoit; Patrisius Maryanto Bria
Jurnal Abdi Masyarakat Indonesia Vol 2 No 6 (2022): JAMSI - November 2022
Publisher : CV Firmos

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54082/jamsi.506

Pendidikan yang baik adalah pendidikan yang dapat meningkatkan daya literasi, daya belajar, inovasi dan kreatifitas siswa. Salah satu cara dalam penyampaian proses belajar mengajar yang lebih optimal adalah dengan penyiapan media belajar yang menarik. Media belajar dapat dilakukan dengan pertunjukkan permaianan sains. Kegiatan pengabdian ini dilaksanakan di SMP Negeri II Koko dengan dihadiri siswa/I kelas VII, VIII, dan IX. Materi pengabdian berupa permainan sains berupa Pesan rahasia, Magnet listrik, Peristiwa melayang tenggelam dan terapung, Gunung meletus dan Listrik buah. Kegiatan permainan atau demonstrasi sains ini dilakukan untuk memperkenalkan kepada siswa-siswi pembelajaran sains yang lebih menarik. Kegiatan ini dilaksanakan dengan metode pertunjukkan, ceramah dan diskusi. Dapat disimpulkan bahwa siswa – siswi berinteraksi secara aktif, tidak kaku, penuh semangat ditandai dengan banyaknya pertanyaan yang muncul, dan siswa sangat antusias dalam menjawab pertanyaan yang diberikan oleh tim pengabdi serta tingginya minat siswa untuk terlibat di dalam praktik demonstrasi sains.

Training on Making Solid Soap from Used Cooking Oil in Amol Village, East Miomafo District Risna Erni Yati Adu; Gebhardus Djugian Gelyaman; Jefry Presson
JATI EMAS (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat) Vol 7 No 1 (2023): Jati Emas (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat)
Publisher : Dewan Pimpinan Daerah (DPD) Perkumpulan Dosen Indonesia Semesta (DIS) Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36339/je.v7i1.673

Waste cooking oil is heated at a high temperature of 160-250°C for a long time, causing oxidation, hydrolysis, and polymerization to produce ketones, aldehydes, and polymers that are detrimental to human health. Therefore, it is not recommended for reuse. Waste cooking oil in Amol Village was abundant and accommodated, often used repeatedly and then dumped into the environment without any further treatment. The initial survey showed that most of Amol Village's people do not yet know about the dangers of reusing used cooking oil or the dangers to the environment. On the other hand, high free fatty acids have the potential to be converted into soap through the saponification process with a base. Thus, the socialization of the dangers of waste cooking oil for human health and the environment and training on making solid soap from used cooking oil was carried out in Amol Village to assist the community in dealing with used cooking oil waste and save spending on soap purchases. Problem-solving was carried out through several stages of activities, namely observation, preparatory activities, socialization; manufacture of solid soap product from used cooking oil. Those stages were carried out through demonstrations and practices independently by participants, followed by monitoring, evaluation, and reporting. The knowledge and skills of participants have been improved, regarding to handling the used cooking oil and its processing into solid soap.

Respon Pertumbuhan Vegetatif Dan Generatif Bawang Merah Kultivar Lokal Eban Yang Diberi Perlakuan Giberelin (GA3) Dan Pupuk P Di Dataran Menengah Kabupaten Timor Tengah Utara Anna Tefa; Hermina Manlea; Rikardus Kolo; Antonius Ola; Gebhardus Djugian Gelyaman
Jurnal Penelitian Pendidikan IPA Vol 9 No 4 (2023): April
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i4.3112

One strategy to increase shallot productivity is to use fertilizers and growth regulators. The aim of the study was to determine the response of vegetative and generative growth of shallots to local Eban cultivars through the application of gibberellins and P fertilizers in the middle plains of North Central Timor District. This study used a factorial randomized block design (RBD). The first factor was the application of gibberellins (GA3), consisting of three treatments, namely without application of GA3 (control), application of 100 ppm GA3 and application of 200 ppm of GA3. The second factor was P fertilizer treatment which consisted of three treatments, namely without P fertilizer (P0), P fertilizer 50 kg/ha (P1) and P fertilizer 100 kg/ha (P2). The results showed that the 200 ppm gibberellin treatment had an effect on plant height. Treatment of 100 ppm gibberellins affected tuber diameter, tuber fresh weight and tuber dry weight. Treatment of P 200 kg/ha had an effect on plant height and number of leaves, treatment of P 100 kg/ha had an effect on the number of tillers. Generative growth did not occur in all the treatments tried, this was due to the influence of environmental factors such as high temperatures during the study

Processing and Application of Tarum Leaves into Indigo Powder for Yarn Dyeing in Amol Village, North Central Timor District Risna Erni Yati Adu; Marselina Theresia Djue Tea; Gebhardus Djugian Gelyaman; Jefry Presson
JATI EMAS (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat) Vol 7 No 3 (2023): Jati Emas (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat)
Publisher : Dewan Pimpinan Daerah (DPD) Perkumpulan Dosen Indonesia Semesta (DIS) Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36339/je.v7i3.778

Processing and application of tarum leaves into indigo powder for woven threads dyeing has been carried out in the Weaver Women's Group of Amol Village, North Central Timor District. The less knowledge in producing indigo-colored woven fabrics and unavailable source of Indigo leaves during the dry season are the main reasons to conduct this program. This program was carried out in 4 main stages, namely socialization, demonstration of Indigo leaves processing into indigo powder, application in yarn dyeing and evaluation. This activity was able to increase the knowledge and skills of the Weaver group in processing Indigo leaves which are abundant in the rainy season into indigo powder which can be stored for use in the dry season. The resulted powder has been applied in the coloring of the woven yarn to produce an indigo blue color.

Co-Authors Aloysius Rusae Antonius Ola Edi, Eduardus Emilia Juliyanti Bria Giovanny Robertho Wolfram Lake Hermina Manlea Janrigo Klaumegio Mere Jefry Presson Jefry Presson Kolo, Maria Magdalena Marlince Kabosu Obenu, Noviana Mery Patrisius Maryanto Bria Regina Seran Rikardus Kolo Risna Erni Yati Adu Sefrinus Maria D. Kolo Tea, Marselina Theresia Djue Tefa, Anna Yohana Ivana Kedang Yolanda Getrudis Naisumu Yoseph Satrio Akoit

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