Article Per Year (5 Year)
p-Index From 2021 - 2026
2.439
P-Index
This Author published in this journals
All Journal CHEMISTRY PROGRESS Jurnal Natur Indonesia Jurnal Sains dan Teknologi JURNAL PIJAR Jurnal Riset Kimia Alchemy Jurnal Penelitian Kimia Jurnal Sains Teknologi dan Lingkungan (JSTL) Jurnal Biologi Tropis Asian Journal of Agriculture Jurnal Pijar MIPA Makara Journal of Science Jurnal Pepadu Jurnal Pengabdian Inovasi Masyarakat Indonesia Molekul: Jurnal Ilmiah Kimia
Erin Ryantin Gunawan
Chemistry Department FMIPA Universitas Mataram, Jl. Majapahit No. 62 Mataram 83125
Religion Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Energy Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

Published : 24 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 24 Documents
Search

 1   2   3 
BIODIESEL SYNTHESIS OF COTTON SEEDS OIL (CEIBA PENTANDRA) BY CHEMICALLY TRANSESTERIFICATION PROCESS AND ION FRAGMENTATION OF METHYL ESTE Gunawan, Erin Ryantin; Wulandari, Siska Ayu; Yuanita, Emmy; Suhendra, Dedy
Alchemy Jurnal Penelitian Kimia Vol 10, No 2 (2014)
Publisher : Alchemy Jurnal Penelitian Kimia

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

Abstract

Fossil fuel is Commercial energy sources in many communities where their abundance progressively reduced and the resulting environmental pollution. Biodiesel is one alternative fuel made from vegetable oils are suitable to replace the function of fossil fuels and environmentally friendly. Synthesis of biodiesel from cotton seeds oil was carried out by chemically transesterification process. Composition of methyl esters in biodiesel and was analyzed by GC-MS are methyl palmitate (16.71 %), methyl 8,11- octadecadienoic (46.45 %) and methyl linoleate (4.21 %). The highest biodiesel produced from the conversion of the cotton seeds oil amounted to 93.7 % in weight ratio of oil and methanol (1:1) with the catalyst KOH 1 % (w/w of oil). Chemical properties of biodiesel produced meets the standard SNI 04-7182-2006 include saponification value of 120.167  mg KOH / g, acid value of 0.28 mg KOH / g and iod value 55.84 g  iod/100g.
Abstrak Tulisan ini menguraikan tentang evaluasi data agroklimat klasifikasi Schmid-Ferguson di Pulau Lombok berdasarkan data-data curah hujan terbaru. Metode yang digunakan adalah interpolasi atau ektrapolasi dengan aplikasi SIG. Hasil penelitian menunju Gunawan, Erin Ryantin
Jurnal PIJAR Vol 3, No 1 (2008)
Publisher : Jurnal PIJAR

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

Abstract

Abstract: Wax esters were obtained from lipase-catalysed alcoholysis of palm oil fractions and oleyl alcohol, using n-hexane as solvent. The percent yield of wax esters synthesized from palm oil, palm olein and palm stearin at the optimum condition were 80,7%, 80%, 78,7%, respectively. And the percent yield of wax esters synthesized from palm kernel oil, palm kernel olein and palm kernel stearin were 84,4%, 82,9%, 88,6%, respectively. The saponification value of palm oil, stearin and olein esters are lower than palm kernel oil, stearin and olein esters. The average of the iodine value of esters from palm oil fraction is higher compared with commercial esters. The solubility of wax esters from all sources increased from C1 to C6 of alcohol. Compared with viscosity of commercial ester, wax esters have low viscosity. Similar result for measured of the acid value.Key words: Wax ester, Lipase-catalysed, palm oil fraction, saponification value
Insecticidal selectivity of jayanti plant (Sesbania sesban) for integrated control of diamondback moth (Plutella xylostella) SURIPTO, SURIPTO; SUKIMAN, SUKIMAN; GUNAWAN, ERIN RYANTIN
Asian Journal of Agriculture Vol 1 No 02 (2017)
Publisher : Society for Indonesian Biodiversity & Universitas Mulawarman, Samarinda, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/asianjagric/g010205

Abstract

Suripto, Sukiman, Gunawan ER. 2017. Insecticidal selectivity of jayanti plant (Sesbania sesban) for integrated control of diamondback moth (Plutella xylostella). Asian J Agric 1: 80-84. It has been known previously that leaves of the jayanti plant (Sesbania sesban (L.) Merr.) containing insecticidal ingredients. This study aimed to evaluate the insecticidal selectivity of various extract fractions of S. sesban leaf for the integrated control of cabbage pest, the diamondback moths (Plutella xylostella). Dried leaf powders from S. sesban were extracted in stages by using hexane, dichloromethane (DCM), ethanol, and water, successively. Each of insecticidal performance of S. sesban leaf extract fractions was tested against two types of test insects, namely P. xylostella larvae as target and Diadegma semiclausum imago as non target insects according to completely randomized design in the cabbage plantation at the village of Sembalun, East Lombok, Indonesia. Each mortality data of P. xylostella larvae and D. semiclausum imago processed by probit analysis to determine the concentration of the death of 50% of test insects (LC50) of each test extract. The results showed that the LC50 of S. sesban leaf extracts classified into four fractions, namely hexane, DCM, and water extract fractions to P. xylostella larvae successively was 343.71, 294.78, 29.95, and 1197.13 ppm, and to D. semiclausum imago row was 305.5, 121.56, 37.38, and 1043.70 ppm. The results showed that the insecticidal activity of S. sesban leaf ethanol extract fraction was selective, because its selectivity value is 1.25. On the other hand each insecticidal performance of three S. sesban leaf extracts, i.e. hexane, DCM, and water extract fractions, respectively is not selective, with the selectivity values are 0.89, 0.41, and 0.87.
SINTESIS POLIURETAN DARI ASAM LEMAK TEROKSIDASI MINYAK INTI BUAH NYAMPLUNG MELALUI PROSES POLIMERISASI MENGGUNAKAN TOLUEN DIISOSIANAT Suhendra, Dedy; Solehah, Anggi; Asnawati, Dina; Gunawan, Erin Ryantin
CHEMISTRY PROGRESS Vol 6, No 2 (2013)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.6.2.2013.3496

Abstract

Produksi poliuretan sebagian besar bersumber dari poliol yang berasal dari minyak bumi. Namun minyak bumi merupakan bahan baku yang tidak dapat diperbaharui. Dengan demikian perlu dicari bahan baku alternatif untuk pembuatan poliol sebagai bahan baku poliuretan. Telah dilakukan penelitian sintesis poliuretan dari asam lemak teroksidasi minyak inti buah nyamplung melalui proses polimerisasi menggunakan toluen diisosianat dengan tujuan untuk mengetahui apakah asam lemak minyak inti buah nyamplung dapat dijadikan sebagai bahan baku pembuatan poliuretan dan mengetahui karakteristik poliuretan dari asam lemak minyak inti buah nyamplung. Dari hasil penelitian, asam lemak minyak inti buah nyamplung dapat dijadikan sebagai bahan baku pembuatan poliuretan dengan cara mentransformasi asam lemak menjadi poliol melalui reaksi epoksidasi. Diperoleh perubahan sifat fisiko kimia dari asam lemak menjadi poliol yaitu warna kuning muda menjadi putih kekuningan, indeks bias dari 1,451 menjadi 1,458 dan bilangan iod dari 87 mg iod/g asam lemak menjadi 29 mg iod/g poliol. Persen (%) konversi poliol yang diperoleh dari asam lemak adalah 66,67%, sedangkan persen(%) konversi poliuretan dari poliol adalah 83,73%. Karakteristik poliuretan dari asam lemak minyak inti buah nyamplung yaitu berwarna coklat muda, elastis, homogen, keras dan berbentuk membran.Most of polyurethan production are from polyol that was made from petroleum. Petroleum are material which is un-renewable. Thus, it’s necessary to find an alternative materials to produce polyol as polyurethane raw materials. A research abaut polyurethane synthesis from oxidation fatty acid nyamplung seeds oil through polimerization proces with toluene diisocyanate have been done in order to know are the fatty acid nyamplung seeds oil could be raw materials to make polyurethane and to know polyurethane characteristic from fatty acid nyamplung seeds oil. From the research result, fatty acid nyamplung seeds oil could be use as raw materials ofpolyurethane by transforming fatty acid into polyol through epoxidation reaction. The result are the change ofphysicochemical characters from fatty acid into polyol which is light yellow to white yellowish color, the refractive index from 1,451 to 1,458 and the iodine number from 87 mg iod/gr fatty acid to 29 mg iod/gr polyol. Percentage (%) conversion polyol from fatty acid are 66,67% and percentage (%) conversion polyurethane from polyol are 83,73%. The polyurethane characteristic from fatty acid nyamplung seeds oil are light brown, homogen,elastics, hard and in form of membrane.
ANALISIS SENYAWA TRITERPENOID DARI HASIL FRAKSINASI EKSTRAK AIR BUAH BUNCIS (Phaseolus vulgaris Linn) Balafif, Ragaya Abd. R.; Andayani, Yayuk; Gunawan, Erin Ryantin
CHEMISTRY PROGRESS Vol 6, No 2 (2013)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.6.2.2013.3495

Abstract

Penelitian ini bertujuan untuk menganalisis senyawa metabolit sekunder golongan triterpenoid dari hasil fraksinasi ekstrak air buah buncis (Phaseolus vulgaris Linn). Ekstrak buah buncis di ekstrak dengan cara maserasi dengan pelarut air (1: 18 w/v) dan dianalisis menggunakan KG-SM. Hasil uji pendahuluan menghasilkan bahwa ekstrak kental air buah buncis positif mengandung triterpenoid, Hasil analisis KG-SM menunjukkan bahwa senyawa triterpenoid terbanyak terdapat pada fraksi ekstrak metanol yaitu dua senyawa tetrasiklik triterpenoid tipe lanostane: 9,19-cyclolanost-24-en-3-ol (cycloartenol) yang memiliki rumus molekul C30H50O (m/z = 426) dan senyawa 9,19-cyclolanost-24-en-3-ol,acetat yang memiliki rumus molekul C32H52O2 (m/z = 468) dan hasil fraksinasi kromatografi kolom menghasilkan 78 fraksi dengan hasil uji pereaksi Lieberman Burchard menunjukkan bahwa positif terbanyak mengandung triterpenoid berada pada fraksi 10, fraksi 11 dengan perbandingan eluen heksana : etil asetat = 7 : 3 v/v dan fraksi 17, fraksi 18 dengan perbandingan eluen heksana : etilasetat = 5: 5 v/v.This study aimed to analyze the class of secondary metabolites triterpenoids from the fractionation of aqueous extract of fruit beans (Phaseolus vulgaris Linn). Fruit extract beans in a solvent by maceration with water (1: 18w / v) and analyzed using GC-MS. Lieberman Burchard reagent test results showed that the water condensed fruit beans extract containing triterpenoids and GC-MS analysis showed that the highest triterpenoid compound present in the methanol extract fraction triterpenoid compounds tetrasiklik types lanostane: 9.19-cyclolanost-24-en-3-ol (cycloartenol) which has the molecular formula C30H50O (m / z = 426) and compound9.19-cyclolanost-24-en-3-ol, acetate which has the molecular formula C32H52O2 (m / z = 468) and the results of the fractionation column chromatography produce 78 fractions with Lieberman Burchard reagent test results showed that the most positive fractions containing triterpenoids are at 10, 11 fractions with a ratio of eluent hexane: ethyl acetate = 7: 3 v / v and fraction 17, fraction 18 with a ratio of eluent hexane: ethyl acetate = 5 : 5v / v.
Sintesis Asam-Asam Lemak Hidroksamik dari Minyak Kelapa Menggunakan Lipase sebagai Katalis Suhendra, Dedy; Gunawan, Erin Ryantin
Jurnal Natur Indonesia Vol 14, No 1 (2012)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (204.099 KB) | DOI: 10.31258/jnat.14.1.160-164

Abstract

Fatty hydroxamic acids (FHAs) have been successfully synthesized from coconut oil by a one-step lipase catalyzed reaction. FHAs are theacids that are based on fatty acids. Their hydrophobicity can be use for some applications such as surfactant and metal ions extraction fromaqueous media. This paper describes enzymatic synthesis of FHAs from coconut oil by reacting hydroxylamine with the substrate catalyzedby a lipase. The lipase used was Lipozyme, a commercially lipase of Mucor meihe fixed on a polymer anion exchange resin. The use ofimmobilized lipase as the catalyst for the preparation reaction provides an easy isolation of the enzyme from the products and othercomponents in the reaction mixture. In addition, it also allows the reaction to be carried out under mild conditions, which reduces thereaction’s side products. The optimum preparation conditions obtained were as follows; the reaction temperature was 30 oC, the reactiontime was 30 h, the ratio of coconut oil : lipozyme (g : g) was 29.5, and the ratio of hydroxylamine : coconut oil (mmol : mmol) was 6. Thesolvent used was hexane. The purified products were characterized by qualitative test, such as FTIR spectroscopy and HPLC.
Analisis Asam Lemak Omega-3 dari Minyak Kepala Ikan Sunglir (Elagatis bipinnulata) melalui Esterifikasi Enzimatik Handayani, Sri Seno; Gunawan, Erin Ryantin; Kurniawati, Lely; Murniati, Murniati; Budiarto, Lalu Haris
Jurnal Natur Indonesia Vol 15, No 2 (2013)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (153.859 KB) | DOI: 10.31258/jnat.15.2.75-83

Abstract

Omega-3 fatty acid is the essential fatty acid and important for human health. Omega-3 fatty acid is also really neededby pregnant and lactating mothers and also children to prevent the malnutrition. Omega-3 fatty acid is also reallyneeded by pregnant and lactating mothers, and children to prevent the malnutrition. The omega-3 fatty acid is commonlyfound in some fish like salmon, tuna, hering, and mackarel. However, those fish are expensive, so alternativesources relatively cheaper fish. One of fish that is low in price and high in production in Nusa Tenggara Barat is Sunglir(Elagatis bipinnulata ). The purpose of this research was to determine free fatty acids content, type of omega-3 fattyacids, and their compositions in head fish oil. Head of sunglir fish was used as a sample because the head was usuallynot consumed. Sunglir fish was obtained from the Ampenan beach (NTB) with a size of 20–30 cm. The extraction methodused in this study was soxhletation with n-hexane solvent and analyzed with Gas Chromatografi (GC), acid ethyl estersfrom the esterification enzymatic of fish oil. Result revealed that the fish oil contained 84% free fatty acid and 0.85%linolenic acid (ALA), 2.80% eicosatrienoic acid (ETA), 0.73% eicosapentaenoic acid (EPA) and 2.41% docosahexaenoicacid (DHA). Saponification and iodine number of head fish oil is 248.24 mg KOH/g oil and 227.16 g Iod/100 g oil.
Enzyme–Catalysed Synthesis of Palm-Based Wax Esters-A Kinetic Study Gunawan, Erin Ryantin; Basri, Mahiran; Suhendra, Dedy
Jurnal Natur Indonesia Vol 14, No 1 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (289.921 KB) | DOI: 10.31258/jnat.14.1.37-41

Abstract

Wax esters are long chain esters that are derived from fatty acids and alcohols with chain lengths of 12 carbons or more. Wax esters havea wide range of application in industrial especially in cosmetics. The present work focuses on the synthesis of wax esters by alcoholysisreaction from palm oil and oleyl alcohol in hexane by lipase from Rhizomucor meihei (Lipozyme IM). Effect of various concentrations ofpalm oil and oleyl alcohol were studied to deduce the kinetics and mechanism of the reaction. The alcoholysis reaction followed Michaelis-Menten kinetics. The reaction follows a Ping-pong Bi-Bi mechanism. The maximum rate was estimated to be 6 x 10 -3 mmol/h. mg catalystand the Michaelis-Menten constant for palm oil and oleyl alcohol were 4.145 M and 6.120 M, respectively.
ANALISIS SENYAWA FLAVONOID HASIL FRAKSINASI EKSTRAK DIKLOROMETANA DAUN KELUWIH Mariana, Lilik; Andayani, Yayuk; Gunawan, Erin Ryantin
CHEMISTRY PROGRESS Vol 6, No 2 (2013)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.6.2.2013.3494

Abstract

Penelitian ini menganalisis kandungan senyawa flavonoid pada ekstrak diklorometana daun tanaman keluwih (A. camansi). Ekstrak diperoleh melalui proses maserasi simplisia dengan pelarut diklorometana pa selama 2 x 24 jam. Ekstrak yang dihasilkan difraksinasi menggunakan kromatografi kolom dan hasil fraksi dianalisis kandungan senyawa flavonoid menggunakan metode kromatografi lapis tipis menggunakan senyawa standar (kalkon). Hasil penelitian menunjukkan dari 7 fraksi ekstrak diklorometana daun A. camansi terdapat 5 fraksi yang positif mengandung senyawa flavonoid, fraksi yang memberikan uji senyawa flavonoid terbanyak terdapat pada fraksi yang diperoleh pada perbandingan eluen n-heksana:DCM= 5:5 yang diduga sebagai senyawa golongan kalkon.This study analyzed the content of flavonoid compounds in the dichloromethane extract of the leaves of plants breadfruit tree (A. camansi). Extracts obtained by maceration process simplisia with dichloromethane solvent pa for 2 x 24 hours. The resulting extract was fractionated using column chromatography and the results were analyzed content of flavonoid fractions using thin layer chromatography method using standard compounds (Chalcone). The results of research that show 7 from dichloromethane leaves extract fractions A. camansi there are 5 positive fraction contains flavonoid, the fraction that gives the highest test flavonoid found in fractions obtained in comparison eluent n-hexane: DCM = 5:5 showed the presence of the unexpected as chalcon.
PROFIL KANDUNGAN ASAM LEMAK TAK JENUH PADA EKSTRAK MINYAK IKAN LELE (Clarias Sp) HASIL REAKSI ESTERIFIKASI DAN TRANSESTERIFIKASI SECARA ENZIMATIS Gunawan, Erin Ryantin; Handayani, Sri Seno; Kurniawati, Lely; ., Murniati; Suhendra, Dedy; ., Nurhidayanti
CHEMISTRY PROGRESS Vol 7, No 2 (2014)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.7.2.2014.7472

Abstract

This study aims to determine the type and content of fatty acids in fish, especially on the head catfish catfish andparts of the body as a comparison. Fish oil or triglycerides extracted with soxhletation method with n-hexanesolvent. Water content, iodine number and saponification numbers of fish oil has been determined. Qualitative test of fish oil has been done by TLC (thin layer chromatography). To observe the fatty acid content profile is done in two ways, through the process of hydrolysis of triglycerides then esterified and the second, through enzymatic transesterification reaction. The enzyme used is immobilized lipase (Lipozyme). The results obtained were analyzed using a gas chromatography-mass spectrometry (GC-MS). Total percent composition of unsaturated fatty acids (oleic, linoleic, EPA and DHA) on the head is 3.34% - 5.06% while in the body is 2.02%. - 3.85%.Penelitian ini bertujuan untuk mengetahui jenis dan kandungan asam lemak pada ikan Lele terutama padabagian kepala ikan lele dan bagian badan sebagai perbandingannya. Teknik ekstraksi minyak (trigliserida)menggunakan metode soxhletasi dengan pelarut n-heksan. Minyak yang diperoleh kemudian dianalisis kadarairnya, ditentukan angka iod, angka penyabunannya dan uji kualitatif dengan KLT (Kromatografi Lapis tipis).Untuk melihat profil kandungan asam lemaknya dilakukan dua cara, yaitu melalui proses hidrolisis trigliseridakemudian diesterifikasi dan yang kedua melalui reaksi transesterifikasi secara enzimatis. Enzim yang digunakanadalah enzim lipase yang sudah diimobilisasi (Lipozim). Hasil yang didapatkan dianalisis menggunakan alat gaschromatography-mass spectrometry (GC-MS). Total persen komposisi asam lemak tak jenuh (oleat, linoleat, EPA dan DHA) pada bagian kepala adalah 3,34% - 5,06% sedangkan pada bagian badan adalah 2,02%-3,85%.
Co-Authors 'Ardhuha, Jannatin A. Wahab Jufri A.A. Ketut Agung Cahyawan W Adiguna, Sya’ban Putra Agus Abhi Purwoko Ali Djamhuri Anggi Solehah Arlia, Erma Azumi, Baiq Miftah Balafif, Ragaya Abd. R Bali, Rizka Dhia Khalilah Basri, Nurul Hasan Dedy Suhendra Diah Miftahul Aini Dina Asnawati Emmy Yuanita Erin Ryantin Gunawan Faradis, Taritsu Hazal Farida Ariani Gunawan Gunawan Izzati, Assifa Joni Rokhmat Lalu Haris Budiarto, Lalu Haris LALU RUDYAT TELLY SAVALAS Lely Kurniawati Lilik Mariana Listantia, Nora Mahiran Basri Murniati Murniati . Murniati Murniati Nurhidayanti . Pomeistia, Meilynda Qurba, Pujana Ragaya Abd. R. Balafif Rahmiati Rahmiati Ramdani, Nanila Rischia, Amida Rozitawati, Mona Saputri, Dita Ayu Sari, Gita Sagita Siska Ayu Wulandari, Siska Ayu Sri Seno Handayani Sri Seno Handayani Sukarso, A. A. Sukiman Sukiman Suriadi . Suriadi Suriadi Usiana, Shilan Yanti, Sepia Dwi Yayuk Andayani Zaer, Ziana