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All Journal Jurnal Sains dan Teknologi Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Riau Journal of Empowerment Teknomekanik Unri Conference Series: Community Engagement Journal of Applied Materials and Technology Molekul: Jurnal Ilmiah Kimia Jurnal Sains Materi Indonesia
Syelvia Putri Utami
Department Of Chemical Engineering, Engineering Faculty, Universitas Riau
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Pembuatan Komposit Bioplastik Konduktif Berbasis Tepung Tapioka Dengan Penambahan Electrochemichal And Mechanical Liquid Exfoliation Graphene Heri Rahmana; Amun Amri; Syelvia Putri Utami
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Conductive bioplastics are biodegradable plastics that have a good ability to conduct electrical current. This study aims to create a conductive tapioca-based bioplastic composite with the addition of EMLE graphene (Electrochemical and Mechanical Liquid Exfoliation) and study the effect of the amount of EMLE graphene addition to the tensile strength and transparency of bioplastics. Conductive bioplastic production was held by using solution intercalation method. The main raw material was tapioca flour as matrix and graphene as filler. Graphene can be produced by using the Electrochemical and Mechanical Liquid Exfoliation method which made in the liquid phase and mechanically crushed or mashed by using a blender. The products were analyzed by using conductive bioplastic tensile test and transparency. The best tensile test value was 3.92 Mpa with elongation 8.516% in addition for 9% graphene and 30 minutes. The best transparency value was obtained 88.31% without graphene addition.Keywords: bioplastics, EMLE, graphene, solution intercalation, tapioca flour.
Inaktivasi Termal Spora Talaromyces Sp. Berumur 60 Hari Dalam Jus Nanas Fryda Kusumawati Khoirunnisa; Evelyn Evelyn; Syelvia Putri Utami
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Talaromyces sp. is a spore-forming fungi and has been identified as spoilage in fruit-based medium such as pineapple and tomato. The purpose of this study was to determine the effect of temperature on the thermal inactivation of Talaromyces sp. spores of 60 days in pineapple juice and determine D-value and z-value in the process of Talaromyces sp. in pineapple juice. It was shown that higher temperature resulted in the decreasing of time needed to inactivate the spores. The D-value obtained at temperatures of 80, 85, 90 °C were 67.11, 25.33, and 4.80 minutes. The following z-values were also obtained were 8,7 °C for 60 days age. The result of this study indicate the importance of temperature for the heat resistance of two-month old Talaromyces sp. spores in pineapple juice.Keywords: inactivation, pineapple, resistance, spore, talaromyces sp.
Peluruhan Batang Graphite Baterai Bekas Dengan Metode Electrochemical Expoliation Menggunakan Pelarut Asam Sulfat Dan Sodium Sulfat Untuk Produksi Graphene Azhari Harahap; Amun Amri; Syelvia Putri Utami
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Graphene is two dimensional material (2D) consisting of carbon atoms with a flat lattice configuration in a flexible hexagonal pattern. One of the materials that can be used as raw material in graphene synthesis is carbon used battery bar. The purpose of this research was to synthesize graphene using electrochemical exfoliation graphite (EEG) method and to study the process of exfoliation rate over 30, 60, 90, 120 and 150 minutes for 2.5 hours. Graphene was synthesized by using two solvents H2SO4 and Na2SO4 with varied concentrations of : 0.25 M, 0.5 M, 0.75 M and 1 M. From the synthesis results, the best exfoliation rate and the best yields were shown by Na2SO4 solvent at 1 M concentration with a yield of 21.83%. From the graphene conductivity test, the best conductivity was obtained by Na2SO4 solvent at 1 M concentration with conductivity value of 0,1698 Ω-1.cm-1.Key words : Electrochemical exfoliation graphite, graphene, graphite.
Pengaruh Konsentrasi Dan Rasio Berat Few Layer Graphene (FLG) Terhadap Sifat Mekanis Aspal Beton Jenis Asphalt Treated Base (ATB) Muhammad Sugandi; Amun Amri; Syelvia Putri Utami; Muhammad Shalahuddin
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Developing in highway is needed to produce better mechanical properties. This study aims to produce concrete asphalt by adding FLG (Few-Layer Graphene) from graphite, and then comparing the contribution of graphene with concentration and weight ratio of FLG to concrete asphalt as variations. Making asphalt concrete-FLG composite was started from making FLG with concentrations of 10, and 20 mg/ml using the turbulence-assisted shear exfoliation (TASE) method. Then, FLG was added to the bitumen with these variations and mixing it at 150 ᴼC and stirred for 10 minutes for homogenize. The homogenized asphalt bitumen was then mixed with the aggregates that have been prepared using a filter analyzer. The united bitumen and aggregates were then compacted using Marshall Automatic Compactor (MAC) with the number of collisions as much as 112 times and soaked in a water bath for 24 hours at 25 ᴼC. After 24 hours, the Marshall object test was weighed and soaked again for 30 minutes at 60 ᴼC before Marshall’s test. The results showed that for bitumen asphalt, the best penetration was exhibited by sample synthesized using FLG with concentrations of 20 mg/ml and 9% wt, namely 48.1 dmm. For Marshall’s test, the best flow value was also exhibited by the sample with FLG concentrations of 20 mg/ml and 9% wt, namely 4.3 mm. FTIR testing showed that there was an interaction between the FLG and bitumen in the double bond region and single bond stretch.Keywords : asphalt, few-layer graphene, flow, penetrations, softening point, stability
Pengaruh pH Pada Proses Hidrolisis Mikro Alga Chlorella Vulgaris Menjadi Glukosa Menggunakan Enzim Selulase Windy Odelia Putri; Amun Amri; Syelvia Putri Utami
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Microalgae is one of the organisms can be considered as ideal and potential raw material for production of biofuels. Chlorella Vulgaris is a group of green algae that have prospect to be developed. The purpose of this research was to find the effect of pH to enzymatic hydrolysis and obtain the optimum glucose concentration on enzymatic hydrolysis on microalgae Chlorella Vulgaris. Hydrolysis was performed with the variated the conditions of pH was 5, 6, and 7 respectively. Microalgae Chlorella vulgaris was diluted using buffer citrat acid and then mixed with cellulase enzyme. Hydrolysis process was carried out for 48 hours at 100 rpm agitation. Result of experiment was tested by using spectrofotometry UV-VIS. The results showed that the increasing of pH will increased the glucose concentration until optimum condition. The optimum glucose concentration was5,35g/L at pH 6.Keyword: cellulase, chlorella vulgaris, enzymatic, glucose, pH.
Community training in dishwashing-liquid soap making from waste cooking oil Evelyn Evelyn; Edy Saputra; Komalasari Komalasari; Syelvia Putri Utami
Riau Journal of Empowerment Vol 1 No 2 (2018)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (807.093 KB) | DOI: 10.31258/raje.1.2.9

Abstract

Cooking oil that has been used more than once is not good for health due to exposure to carcinogens. Waste cooking oil causes pollution to the environment. Waste cooking oil can be used as a raw material for making liquid soap. The objective of this activity was to introduce the knowledge and train Batu Basurat community in making dishwashing-liquid soap from waste cooking oil. The method consists of location survey, training preparation, interactive training, monitoring, and evaluation. Dishwashing-liquid soap was made by mixing preheated waste cooking oil and potassium hydroxide (KOH) at 60-70 °C for one hour until trace was formed. Then, the mixture was kept agitated every 15 minutes for 2-3 hours until it becomes more solidified and transparent. Liquid soap was made by dissolving in warm water and addition of lemon essence as a deodorizer. Batu Basurat villagers showed a great interest in the activity, showing by enthusiasm and involvement in the training. Evaluation results showed that 100% community understood on making homemade dishwashing-liquid soap and 90% community agreed that liquid soap from waste cooking oil has a commercial potential, which could increase entrepreneurship ability and economic growth of Batu Bersurat villagers.
Pembuatan pupuk organik dari limbah agro industri sebagai alternatif pengganti pupuk sintetis Komalasari Komalasari; Evelyn Evelyn; Edy Saputra; Syelvia Putri Utami
Unri Conference Series: Community Engagement Vol 1 (2019): Seminar Nasional Pemberdayaan Masyarakat
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/unricsce.1.506-510

Abstract

Farm and agro wastes from area which population has their livehood from farming and agriculture will result in the environmental and health issues if there is lack treatment on those wastes. One of the solutions to overcome these problems is to convert farm and agro wastes into organic fertilizer, which is produced from living substances weathering (plants and animals). Organic fertilizers are available in the form of solid or liquid and contain a lot of organic materials than nutrient levels, thus can improve plant growth. Other advantages of organic fertilizer are cheaper than synthetic ones, environmentally friendly, and are able to decrease negative effects of chemical fertilizers. Organic fertilizer can be made individually or in group of people. The objectives of this activity are to introduce the knowledge and train rural community of Kecamatan Rambah Hilir, Desa Pasir Utama Kabupaten Rokan Hulu, Provinsi Riau in making organic fertilizer using farm and agro wastes. The methods use in this activity are through socialization and training on making organic fertilizer from farm and agro wastes to Desa Pasir Utama community. Organic fertilizer was made by mixing cow manure with straw cuts, followed by addition of palm sugar activated effective microorganisms 4 (EM4). The mixture was left to incubate for 4 weeks and aerated every three days to allow good fermentation. This community service activity supports government program in encouraging growth of reusing farm and agricultural wastes that will increase agricultural productivity of rural community.
The conversion of nata de coco bacterial cellulose into cellulose nanofibers using high shear mixer with eco-friendly fluid dynamics method Amri, Amun; Putri, Diana Eka; Febryza, Dhina; Voadi, Salsabilla Diva; Utami, Syelvia Putri; Miran, Hussein A.; Rahman, M. Mahbubur
Teknomekanik Vol. 7 No. 2 (2024): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/teknomekanik.v7i2.32972

Abstract

Nanocellulose is widely applied in various fields due to its superior characteristics. Several methods have been developed to synthesize it, but they still have limitedness as being non-eco-friendly and inefficient use. Therefore, the synthesis of nanocellulose from sustainable sources is being developed using a simple and eco-friendly method. This study successfully produced a low viscosity gel suspension of cellulose nanofibers (CNF) from bacterial cellulose (BC) derived from Nata de Coco using a high shear mixer (HSM). The mixture of BC and water in a 1:1 ratio was processed with various rotational speeds and times in the HSM. The suspension result was characterized using an Ostwald viscometer, UV-vis spectrophotometer, lux meter, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), particle size analyzer (PSA), and x-ray diffraction (XRD). Based on the characterization, it was confirmed that higher rotational speeds and extended processing times reduced the suspension viscosity and increased light transmittance, indicating a reduction in BC size to the submicron/nanometer scale. The best light transmittance was achieved with the HSM at 4500 rpm for 180 min, resulting in a viscosity drop from 232.67 mPa.s to 1.45 mPa.s. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis showed that the CNF retained its fibrous structure with nanometer-scale widths and high porosity without significant changes in crystallinity.
Aplikasi Kertas Bekas untuk Seed paper sebagai Kampanye Budaya Cinta Lingkungan di Desa Batu Belah Kecamatan Kampar Utami, Syelvia Putri; Evelyn, Evelyn; Yusnimar, Yusnimar; Komalasari, Komalasari; Chairul, Chairul; Saputra, Edy
Unri Conference Series: Community Engagement Vol 6 (2024): Seminar Nasional Pemberdayaan Masyarakat
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/unricsce.6.83-86

Abstract

The increase in writing paper waste is quite large in office and educational areas. Likewise in households and the surrounding community. Therefore, the utilization of used paper into seed paper is an interesting thing to be tested in village communities. This community service activity aims to educate the community regarding the utilization of used paper into seed paper. This used paper is soaked in water then printed with a paper printing tool, then given flower seeds. The paper that is ready to be printed is then dried. Seed paper that is no longer used is then planted. This activity is expected to be an alternative to empowering used paper in the Batu Belah Village community, Kampar District.
Response surface methodology for glucose conversion by applying deep eutectic solvent (DES) as green solvent Romaito, Rizki Falah; Wulandari, Dini; Utami, Syelvia Putri; Aziz, Yelmida
Journal of Applied Materials and Technology Vol. 6 No. 1 (2024): September 2024
Publisher : Faculty of Engineering Universitas Riau and Applied Materials and Technology Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/Jamt.6.1.14-20

Abstract

Glucose is a monosaccharide-type carbohydrate that serves as a fundamental building block of biomass. In this research, glucose was hydrolyzed using a Deep Eutectic Solvent (DES) as the solvent and AlCl3  as the catalyst. The effects of temperature and catalyst concentration were investigated as key variables in the reaction. The glucose conversion results were tested using the UV-Vis spectrophotometer. The yields of glucose conversion were analyzed using the Response Surface Methodology (RSM) with Design Expert Version 13 software. The results of RSM analysis show that glucose conversion increases linearly with rising reaction temperature. The effect of catalyst concentration indicates that glucose conversion decreases at higher catalyst levels. The reaction temperature and AlCl3 catalyst concentration that can be recommended for optimum conditions from the Design Expert data processing results are 112.869 C and 1.913% with a predicted conversion value of 93.844%.
Co-Authors -, Evelyn Amun Amri Azhari Harahap Aziz, Yelmida Bahruddin Bahruddin Bahruddin Chairul Chairul Chairul Chairul Deasy Rahmayuni Deni Afrika Dewi Maya Sari Dewi Sunarti Dini Wulandari Edy Saputra Ermalinda, Vina EVELYN EVELYN Evelyn Evelyn Evelyn Evelyn Fajrina Qaishum Fauzia Mulyana Febryza, Dhina Fermi, Iwan Fryda Kusumawati Khoirunnisa Futhanul Wewe Gilda Miranda Hamsyah Adhari Heri Rahmana Jhon Armedi Pinem Karim Abdullah Komalasari Komalasari Komalasari Komalasari Komalasari Komalasari Komalasari Miran, Hussein A. Muhammad Furqan, Muhammad Muhammad Rivai Muhammad Shalahuddin Muhammad Sugandi Nakagawa-Izumi, Akiko Nor Aisha Saidina Amin Novia Azzahra Novriyani, Vivi Nurwijayanti Ohi, Hiroshi Pebriansyah Putra Priscilla Vidya Merarin Putri, Diana Eka Rahman, M. Mahbubur Rezki, Yoanni Marsha Rifati Hanifa Romaito, Rizki Falah Sari, Esty Octiana Sri Rezeki Muria Voadi, Salsabilla Diva Wahyu Hidayat Windy Odelia Putri Yasminto, Habib Maulana Yusnimar Sahan