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All Journal CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Jurnal Kimia (Journal of Chemistry) Buletin Udayana Mengabdi Ecotrophic, Journal of Environmental Science KOVALEN: Jurnal Riset Kimia Indonesian Journal of Cancer Chimica et Natura Acta Indonesian Journal of Cancer Seminar Ilmiah Nasional Teknologi, Sains, dan Sosial Humaniora (SINTESA)

James Sibarani

Program Studi Kimia, FMIPA, Universitas Udayana

Author-ID : 2922189

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Electrical & Electronics Engineering Environmental Science Health Professions Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology Public Health Social Sciences

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BIODEGRADATION DYE INDIGOSOL GOLDEN YELLOW IRC USING VERTICAL BIOSYSTEM Sophia Maria Oliva Lau; I Wayan Budiarsa Suyasa; James Sibarani
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 12 No 1 (2018)
Publisher : Master Program of Environmental Science, Postgraduate Program of Udayana University

The artificial waste of indigosol golden yellow irc dye has been processed using vertical biosystems with dimension of 30cm x 30 cm x 37 cm in the presence of Typha angustifolia Linnaeus plant and the addition of active mud seed from Batanta island road. The artificial wastes of indigosol golden yellow irc dye are made with concentrations of 25 mg / L. The processing of dye indigosol golden yellow irc is done by immersion system for 0, 1, 2, 3, until 4 days. Reduced concentration of indigosol golden yellow irc dye was measured using a uv-vis spectrophotometer and also measured the reduced concentration of COD, TDS and TSS. The results show vertical biosystem able to degrade The artificial waste of indigosol golden yellow irc dye, COD, TDS, and TSS are 47,80%; 41.17%; 76.51% and 63.06%. Keywords: Vertical Biosystems, Typha angustifolia Linnaeus, indigosol golden yellow irc

Aplikasi Antibakteri Nanopartikel Perak (NPAg) Hasil Biosintesis dengan Ekstrak Air Daun Kemangi: Application of Antibacterial from Silver Nanoparticles (AgNPs) Biosynthesis with Basil Leaf Extract Gusti Ayu Dewi Lestari; Pande Made Desy Ratnasari; James Sibarani
KOVALEN: Jurnal Riset Kimia Vol. 8 No. 1 (2022): April Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2022.v8.i1.15771

Nanotechnology is a technology that can be used to overcome several environmental problems. Synthesis of silver nanoparticles (AgNPs) mediated with basil leaf bioreductant with a concentration 0.5% at a temperature of 25⁰C has been carried out. The result of biosynthesis of AgNPs was analyzed using a UV-Vis spectrophotometer in which the SPR band showed the maximum wavelength of 429 nm. The size of AgNPs was determined by a Particle Size Analyzer (PSA), which its size was 86.83 nm. The morphology and elemental content of AgNPs were confirmed using SEM-EDS showing that the shape of AgNPs was irregularly spherical crystals while the EDS results showed a dominant peak at 3 keV indicating silver content. AgNPs showed strong antibacterial activity against Escherechia coli and moderate against Staphylococcus aureus.

PENINGKATAN KEMAMPUAN MENULIS SISWA PAKET B DAN C MELALUI PELATIHAN TEKNIK PENULISAN ILMIAH I. W. Sumarjaya; M. Joni; J. Sibarani; I. P. W. Gautama
Buletin Udayana Mengabdi Vol 20 No 1 (2021): Buletin Udayana Mengabdi
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

As a nonformal education institution for students that dropped-out of schools, pusat kegiatan belajar masyarakat (PKBM) plays important role in promoting the spirit of lifelong learning and community learning. One of the fundamental components of education, either formal or nonformal, is writing. The ability to write, especially scientific writing, is not an inborn talent but acquired. Results of interview conducted in early February 2019 concluded the followings. First, students are not capable of doing scientific writing correctly. This can be seen from their inability in creating cohesive and coherence sentences. Second, the students seem to lack confidence when participating in writing competition held regularly by Kemdikbud. Finally, the workplace often requires employees to make correspondence and written reports. One way to improve students’ ability to write scientifically is through basic scientific writing workshop. This community service started by giving questionnaires to students which consists of an informal writing about themselves and a scientific writing about social phenomenon. The next step is delivering workshop, giving posttest, and doing workshop evaluation. Based on our evaluation we conclude that the workshop can improve students’ ability to write scientifically.

Potensi Antikanker Isolat Toksik Tiga Spons Indonesia MADE DIRA SWANTARA; WIWIK SUSANAH RITA; JAMES SIBARANI
Indonesian Journal of Cancer Vol 7, No 4 (2013): Oct - Dec 2013
Publisher : National Cancer Center - Dharmais Cancer Hospital

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33371/ijoc.v7i4.311

Telah dilakukan uji antikanker isolat toksik 3 (tiga) jenis spons yang berasal dari perairan Indonesia. Ketiga spons tersebut adalah Callyspongia aerizusa, Haliclona fascigera, dan Lanthella basta. Isolasi metabolit dalam spons dilakukan dengan cara maserasi, kemudian dilanjutkan dengan tahap pemisahan dan pemurnian menggunakan cara partisi serta kromatografi kolom. Skrining toksisitas dilakukan dengan metode Bhrine Shrimp Lethality Test (BSLT). Uji antikanker secara in vitro isolat yang paling toksik menggunakan sel HeLa. Berdasarkan hasil penelitian ini diperoleh bahwa spons Callyspongia aerizusa bersifat sebagai antikanker dengan LC50 sebesar 5,50 ppm. Spons Haliclona fascigera tidak bersifat antikanker terhadap sl HeLa, karena harga LC50 sebesar 44,67 ppm. Sedangkan spons Lanthella basta bersifat antikanker dengan harga LC50 sebesar 18,62 ppm.Kata Kunci: aktivitas antikanker; Callyspongia aerizusa; Haliclona fascigera; Lanthella basta

KINETIKA TRANSFER ION DOPAMIN PADA ANTARMUKA AIR-NITROBENZENA SECARA VOLTAMETRI Nyoman Sudarma; Mrs Irdhawati; James Sibarani
Seminar Ilmiah Nasional Teknologi, Sains, dan Sosial Humaniora (SINTESA) Vol 1 (2018): PROSIDING SINTESA
Publisher : LPPM Universitas Dhyana Pura

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

ABSTRAKPenelitian transfer ion dopamin secara elektrokimia pada antarmuka air-nitrobenzena dengan metode voltametri telah dilakukan. Pengukuran transfer ion ini menggunakan sistem 3 elektroda yaitu 2 elektroda Ag/AgCl sebagai elektroda kerja dan elektroda pembanding, dan elekroda platina sebagai elektroda pembantu.Penelitian diawali dengan pembuatan elektroda pembanding Ag/AgCl yang kemudian dilakukan karakterisasi terhadap elektroda tersebut. Kinetika transfer ion dopamin diketahui dengan melakukan perhitungan nilai potensial standar dan energi bebas Gibbs transfer ion dopamin melalui pengukuran larutan standar dopamin dan tetra metil amonium klorida (TMACl) dengan metode voltametri siklik. Hasil karakterisasi elektroda pembanding Ag/AgCl menunjukkan kelayakan elekroda dengan nilai slope sebesar 60,71 dan r = 0,9984. Potensial standar transfer ion dopamine adalah 0,173 V dan proses berlangsung secara spontan dengan perubahan energi bebas Gibbs (ΔG) sebesar -16,64 kJ/mol.Kata kunci: transfer ion dopamin, antarmuka air-nitrobenzena, voltametriABSTRACTResearch dopamine electrochemical ion transfer at the water-nitrobenzena interface by voltammetry method has been conducted. This measurement uses three electrode system that was two electrode Ag/AgCl electrode as the working electrode and reference electrode, and platinum electrodes as counter electrode. The research comparison begins with the manufacture of electrodes Ag/AgCl were then performed to characterize the electrode. Kinetics of transfer ion dopamine is known to perform calculations potential sandard value and Gibbs energy through measurements the dopamine standard and ammonium chloride and metal tetra (TMACl) solution by cyclic voltammetry method. The results of the reference electrode characterization of Ag/ AgCl electrodes demonstrate the feasibility of the slope value of 60.71 and r = 0.9984. Dopamine standard ion transfer potential is 0.173 V and the process takes place spontaneously with the change in Gibbs free energy (ΔG) of -16.64 kJ/ mol.Keywords: dopamine transfer ion, water-nitrobenzene interface, voltammetry.

PENINGKATAN KOMPETENSI LITERASI SISWA PAKET B DAN PAKET C DI PKBM MENTARI FAJAR MELALUI PELATIHAN LITERASI DIGITAL I.W. Sumarjaya; M. Joni; J. Sibarani; I.G.A. Wibawa
Buletin Udayana Mengabdi Vol 21 No 3 (2022): Buletin Udayana Mengabdi
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BUM.2022.v21.i03.p14

A community learning centre is a nonformal education that runs independently by and for community who are unable to finish formal education for any reasons. One of the challenges faces by students at the PKBM Mentari Fajar is lack of digital literacy. The Fourth Industrial Revolution which is indicated by disruption in information technology, connectivity of devices to the Internet known as Internet of Things (IoT), artificial intelligence’s domination, and cultural changes force students to adapt themselves in new paradigm of learning. This community service aims to strengthen the foundation of digital literacy for students of Paket B and C at PKBM Mentari Fajar though workshop. This material of the workshop includes various topics such as using Google, checking validity of news, creating digital contents, and sharing news and digital content responsibly. The workshop was attended by ten students. During the workshop the students directly apply what the presenters demonstrate so that there is a two-way communication. At the end of the workshop, the team evaluates the workshop and gathers feedback from the students. The evaluation results suggest that 80% of the participants say that the workshop can improve their digital literacy especially creating and sharing digital content. Keywords: community learning centre, literacy, digital literacy, the fourth industrial revolution, digital intelligence

PEMANFAATAN EKOENZIM DARI KULIT BUAH-SAYUR UNTUK PENINGKATAN KUALITAS AIR DANAU BATUR DI KECAMATAN KINTAMANI BANGLI, BALI Suyasa, I Wayan Budiarsa; Susanah Rita, Wiwik; Irdhawati, Irdhawati; Gede Widihati, Ida Ayu; Wirajana, Nengah; Sibarani, James
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 18 No 1 (2024)
Publisher : Master Program of Environmental Science, Postgraduate Program of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/EJES.2024.v18.i01.p08

Eco enzyme production through the fermentation process of household waste, such as leftover fruit and vegetables can also be a solution to minimize waste from its source. This research aims to determine the effect of a mixture of organic materials, fruit and vegetable waste eco enzyme on pH, and the effect of eco enzyme dosage on improving the water quality of Lake Batur, Kintamani Bali. Making eco enzymes using vegetable and fruit waste. water, molasses in a ratio of 3: 10: 1. The liquid is fermented for 3 months while observing the fermentation process. Eco enzyme is harvested and filtered, ready for testing to improve the water quality of Lake Batur. The results of observations of making eco enzyme can be explained that in the first 4 weeks, there was a change in colour with shades of brown to reddish, after the fourth week the colour was relatively stable (no colour change. Changes in pH during the process of making eco enzymes were related to variations in the composition of organic material (vegetable residues. There was a decrease in pH). with an average of up to 1 digit, the highest reduction occurred in ingredients containing papaya, mango and mustard greens. Eco enzymes can improve water quality as indicated by several water quality parameters, but are not enough to achieve conformity with the established quality standards. Keyword: Eco Enzyme; Water Quality; Batur Lake

SIFAT FISIKOKIMIA HAND AND BODY CREAM DENGAN PEMANFAATAN EKSTRAK ETANOL BUNGA GEMITIR (Tagetes erecta L.) DAN BUNGA PACAR AIR MERAH (Impatiens balsamina L.) DARI LIMBAH CANANG Ika Paramitha, Dewa Ayu; Sibarani, James; Suaniti, Ni Made
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 5 No 1 (2017)
Publisher : Graduate Program of Applied Chemistry, Udayana University, Bali-INDONESIA

ABSTRAK: Pada penelitian ini dilakukan pengembangan formula sediaan hand and body cream dengan memanfaatkan sumber antioksidan yang dimiliki oleh dua jenis ekstrak etanol yaitu ekstrak bunga pacar air merah (Impatiens balsamina L.) dan bunga gemitir (Tagetes erecta L.) dengan taraf perlakuan sebesar 1% dari masing-masing ekstrak (FPM dan FG) dan campuran 0,5% ekstrak pacar air merah dan 0,5% ekstrak gemitir (FCPMG). Pengujian terhadap produk dilakukan pada sifat fisikokimia meliputi pH, viskositas, aktivitas antioksidan, angka lempeng total mikroba, dan ukuran partikel. Berdasarkan hasil pengujian produk hand and body cream yang dihasilkan memiliki antioksidan yang cukup tinggi sebagai produk perawatan tubuh dengan penambahan 1% ekstrak etanol pacar air merah, gemitir dan campuran dari kedua ekstrak etanol. Kualitas produk hand and body cream yang dihasilkan baik dan memenuhi standar mutu SNI dari aspek nilai pH, viskositas, dan nilai ALT. Warna yang dihasilkan mulai dari warna kuning kemerahan sampai dengan warna kuning, dan partikel yang dimiliki oleh produk adalah nanopartikel dengan sistem polidispersi. ABSTRACT: Formulations of hand and body creams using ethanol extracts of flowers of red Impatiens balsamina L. And Tagetes erecta L. As antioxidant sources have been developed. One percent of extracts (FPM and FG) and the mixture of 0.5% each extracts (FCPMG) were added to the basic formula. The analysis of physicochemical properties of the products was conducted including pH, viscosity, antioxidant activity, the size of the particles, and total microbial plate numbers. Based on the results, the quality of the hand and body creams meet the national standard of Indonesia (SNI) regarding to pH, viscosity, and the total microbial numbers. The colours of the hand and body creams resulted are reddish yellow to yellow with polydispersion nanoparticles.

Modifikasi Biofoam Berbasis Pati Singkong dengan Serat Eceng Gondok dan Variasi Konsentrasi Plasticizer: Modification of Cassava Starch-Based Biofoam with Water Hyacinth Fiber and Concentration Variation of Plasticizer Hutagalung, Sarawinda; Sibarani, James; Pramesti , Resia Yoan; Puspaningtya, Theresia Hellen Renata
KOVALEN: Jurnal Riset Kimia Vol. 10 No. 2 (2024): August Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2024.v10.i2.17104

Biofoam is a plant-based alternative packaging. The biofoam was prepared by using the extrusion method and baking process. This research aims to determine the lowest ratio of PVA and glycerol in absorbing water and testing the mechanical properties of biofoam (tensile strength, biodegradation test and FTIR analysis. The best biofoam composition in absorbing water was obtained at a ratio of PVA: glycerol 8%. The results of biofoam characteristics obtained by the water absorption test were 9.76%, maximum bending strength was 9.20 MPa and biofoam can be degraded 100% on day 15. The results of FTIR analysis showed the presence of absorption spectra at wave numbers 3410,15 cm-1, which is a typical region of O-H functional groups (strong and broad) carbohydrates and polyphenols. Modification of starch with fiber and plasticizer in research improves the physicochemical characteristics of biofoam in terms of increasing water absorption and biofoam biodegradation. In contrast, in terms of mechanical properties, the bending strength of biofoam requires further research referring to the characteristics of biofoam mechanical properties toward SNI standards.

Co-Authors A. A. Bawa Putra Anak Agung Istri Agung Mayun Laksmiwati Arik Agustina Arisma Damayanti Dewa Ayu Ika Pramitha Dewi Yuliana Diah Prihatiningsih Didik Setiawan Dina Lindawati Purba Emmy Sahara Ermin Riskiani Gede Widihati, Ida Ayu Gusti Ayu Dewi Lestari I Gede D. Yudha Partama I Made Dira Swantara I Made Oka Adi Parwata I Nengah Wirajana I Putu Mahendra I W BUDIARSA SUYASA I Wayan Suarsa I. A. Gede Widihati I. A. R. Astiti Asih I. Apriliyanto I. P. W. Gautama I. W. Sumarjaya I. W. Sumarjaya I.G.A. Wibawa I.W. Sumarjaya Ika Paramitha, Dewa Ayu Irdhawati Irdhawati Iryanti Eka Suprihatin Ketut Ratnayani M. Joni M. Nazib Made Arie Kusuma Dewi Made Rai Rahayu Manuntun Manurung Marsela Luruk Bere Martha Zulfihardini Martin Joni Ni Luh Kasih Ariani Ni Luh Putu Widiantini Ni Made Puspawati Ni Made Shinta Megawati Ni Made Suaniti Ni Nyoman Rupiasih Ni Putu Rahayu Kusuma Pratiwi Ni Putu Widyana Kartini Nyoman Sudarma Oscar Yonathan Hambiyono P Oka Sudiana Pande Made Desy Ratnasari Pramesti , Resia Yoan Puspaningtya, Theresia Hellen Renata Putu Aprilliana Indah Kumala Dewi Putu Suarya Sarawinda Hutagalung Sophia Maria Oliva Lau Tri Madesa Patadungan Wirajana, Nengah WIWIK SUSANAH RITA

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