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All Journal VALENSI JURNAL KIMIA SAINS DAN APLIKASI Jurnal Ilmu Dasar Jurnal Natur Indonesia Sainstek TELKOMNIKA (Telecommunication Computing Electronics and Control) Jurnal Matematika & Sains Eksergi: Chemical Engineering Journal Jurnal Riset Kimia ROTOR: JURNAL ILMIAH TEKNIK MESIN Jurnal Kimia dan Kemasan PROSIDING SEMINAR KIMIA Chimica et Natura Acta INDONESIAN JOURNAL OF APPLIED PHYSICS ALCHEMY Jurnal Penelitian Kimia Indonesian Journal of Chemistry JURNAL PHOTON Eksakta : Berkala Ilmiah Bidang MIPA Indonesian Journal of Electrical Engineering and Computer Science Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks Hydrogen: Jurnal Kependidikan Kimia Jurnal Kimia dan Kemasan AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Makara Journal of Science SAINTI: Majalah Ilmiah Teknologi Industri Jurnal Kimia Unand
Syukri Arief
Andalas University
Agriculture, Biological Sciences & Forestry Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Social Sciences Other

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PRODUKSI GLUKOSA DARI BATANG KELAPA SAWIT MELALUI PROSES HIDROLISIS SECARA ENZIMATIS MENGGUNAKAN AMILASE TERMOSTABIL Yetti Marlida; Mirzah -; Syukri Arief; Khoirul Amru
Jurnal Riset Kimia Vol. 7 No. 2 (2014): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v7i2.190

Abstract

ABSTRACTThis study aimed to explore the optimization of the concentration of oil palm trunks andthermostable amylase enzyme preformance produce highest sugar (glucose total and reducingsugars) as well as the degree of polymerization. The design used in this study was a completelyrandomized design (CRD) factorial using 2 factors: factor A which consists of four levels ofamylase enzyme that A1: 250 units / kg, A2: 500 units / kg, A3: 750 units / kg and A4: 1000 units/ kg. Factor B is the concentration of oil palm trunk yitu B1: 20% (200 g / 1 liter) B2: 40% (400g / 1 liter) and B3: 60% (600 g / 1 liter) were repeated 3 times. The results showed that there is ahighly significant interaction (P <0.01) in the levels of amylase enzyme (factor A) with theconcentration of oil palm trunks (factor B) on reducing sugar, siqnificantly interaction (P <0.05)on total sugars and degree of polymerization (DP) . This research can be concluded that the besttreatment at a concentration of 60% oil palm trunks and levels 250 unit/kg of an enzymeconcentration that produces of total sugars 7.86 mg/ml, reducing sugar 15.69 mg /ml and degreeof polymerization 0.50Keywords : amilase, total gula, gula pereduksi, derajat polimerisasi.
PENGOLAHAN LIMBAH POLIPROPILEN MENJADI BAHAN BAKAR CAIR MELALUI METODE PIROLISIS Restina Bemis; Novesar Jamarun; Syukri Arief
Jurnal Riset Kimia Vol. 5 No. 2 (2012): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v5i2.217

Abstract

Plastics become the biggest environmental problem when it accumulate in landfills because its non-biodegradable properties. To handle the problems, the plastics were processed to produce liquid fuels by means pyrolysis method which was in this case with and without a catalyst. In this work, polypropylene was used as a precursor and SiO2, zeolites, CaO, Fe as catalysts. FTIR spectrum of pyrolized polypropylene with and without catalysts both have shown C = C functional group at 1648 cm-1. GCMS analysis confirmed the availability of chain length of hydrocarbon between C7 -C27 which is mixture of kerosene and diesel fractions. Catalysts can lower the temperature and time reaction of pyrolysis process as they increase rendement (%) of product. Liquid fuels that produced from polypropylene pyrolysis without catalyst was 72.06%, and with catalysts were 79.59% (SiO2), 74.76%, (zeolite), 76.80% (CaO), and 76.83% (Fe).
DISAIN GEOMETRI REAKTOR FOTOSEL CAHAYA RUANG Rahadian Zainul; Admin Alif; Hermansyah Aziz; Syukri Arief; Syukri -
Jurnal Riset Kimia Vol. 8 No. 2 (2015): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v8i2.230

Abstract

This research aims to obtain reactor design photocells that can convert light energy into electrical energy space. Room light energy derived from sunlight that comes into the room and fluorescent light irradiation. Photocells reactor using a panel of copper oxide (Cu2O/CuO) of calcined Cu plate and filler electrolyte Na2SO4 0.5 N. The design of the geometry of the reactor photocells covering thickness of the glass pane, the distance between the electrodes, the interface layer, layer and coating reflector panels, and junction type np used. Reactor photocells 1 (R1) and 2 (R2) is identical in geometry to the thickness of the glass panel 3 mm thick reactor 15 mm without anti reflector, but the difference at the junction of type n, (R1 = plate Cu; R2 = plate Aluminum) generate 182.82 mW/m2 and 21119644.3 NW/m2. Design R3 (junction-type n = plate Cu) and R4 (junction-type n = plate Al), a panel thickness of 15 cm and has a layer anti reflector provide power 214.95 mW/m2 and 24163298.3 NW/m2. Design Reactor 5 (R5 = Cu) and R6 (Al), thickness of 9 mm, the distance between the electrodes 0:30 mm, using anti reflector carbon, giving each the power of 277.36 mW/m2 and 31258420.91 NW/m2. The most optimum reactor design is the design of R6 with 2:14% conversion capabilities (Intensity = 90.21 foot candles) for the sunlight into the room.
SINTESIS DAN KARAKTERISASI WOLLASTONIT BERBAHAN DASAR ALAMI DENGAN METODE HIDROTERMAL Rianda -; Zulhadjri -; Syukri Arief
Jurnal Riset Kimia Vol. 8 No. 2 (2015): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v8i2.233

Abstract

Indonesia is one of huge paddy producing countries so that it also produces rice husk in a great number. Rice husks contain high silica. Which is good in silica compounds synthesis such as Wollastonit (CaSiO3). Nowadays Wollastonit has attracted great intension doe to its ability to increase mechanical properties of a material. In this work, rice husk was taken from Sariak Laweh, Lima Puluh Kota district and CaO was taken from Halaban, in the same district. Analysis with XRF show that SiO2 and CaO content of both samples were high enough, 97% and 98% which indicated their good potential as silica and calcium source in to synthesize of Wollastonit. Characterization XRD and SEM were found that the Wollastonit obtained which rice husks gave good result.
SINTESIS DAN KARAKTERISASI ZEOLIT FAUJASIT DARI LIMBAH BATUBARA OMBILIN DENGAN METODA ALKALI HIDROTERMAL AIR LAUT Upita Septiani; Widya Yuliani Fatiha; Syukri Arief
Jurnal Riset Kimia Vol. 8 No. 2 (2015): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v8i2.235

Abstract

Zeolite synthesis using Ombilin coal fly ash at low temperature with alkaline hydrothermal process has been carried out. The used Fly ash was melted by NaOH at a temperature of 550°C. Alkaline hydrothermal processes in zeolite synthesis performed with variations of temperature at 35°C , 45°C and 60°C . The zeolite that obtained was characterized by using Fourier Transform Infra Red (FT - IR), X - Ray Diffraction (XRD) , Scanning Electron Microscopy (SEM) in combination with EDX . The characterization results showed the formation of zeolite were better when an increasing in temperature processes and the use of sea water as a solvent. On the use of seawater, were obtained sodalit zeolite with the chemical formula Na8(Al6Si6O24)Cl2.
KAJIAN TEORITIS KEMAMPUAN CAPPING KATEKIN, KATEKU TANAT DAN QUARSETIN TERHADAP NANOPARTIKEL PERAK DENGAN MENGGUNAKAN METODA DFT-B Syukri Arief; Emriadi -; Ade Saputra
Jurnal Riset Kimia Vol. 9 No. 1 (2015): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v9i1.256

Abstract

Interdiffusion mechanism of catechin, catechutannic acid and quercetin are studied by using DFT-B method. But before conducting these experiment, we perform molecular dynamic simulations to find adsorption models probability of each compound. Two models adsorption of quarcetin, four models for catechin and three models for catechutannic acid have been obtained from molecular dynamic simulations. Quantum parameter of each compound, energy and properties adsorption models have been calculated and discussed. The theoretical results were found to be consistent with the experimental data reported. Futhermore, optimization adsorption model samples show that all of adsorbents have weak bonds on the surface of silver nanoparticles. The mechanism can be classified as strong physisorption, so that catechin, catechutannic acid and quercetin can be categorized as good capping agent in synthesis of silver nanoparticles.
Pendekatan Green Synthesis Nanopartikel CuFe2O4 Dengan Bantuan Ekstrak Daun Gambir Dan Sifat Anti Bakterinya Suci Auliya Rahmi Elsya; Zulhadjri Zulhadjri; Syukri Arief
Jurnal Kimia dan Kemasan Vol. 41 No. 2 Oktober 2019
Publisher : Balai Besar Kimia dan Kemasan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (380.45 KB) | DOI: 10.24817/jkk.v41i2.5417

Abstract

Perkembangan nanoteknologi berkaitan dengan nanomaterial berfungsi untuk meningkatkan kemampuan antibakteri serta mengurangi jumlah pemakaian logam. Penelitian ini bertujuan untuk mengetahui pengaruh suhu, pH dan waktu sintesis hidrotermal terhadap karakteristik nanopartikel tembaga ferit (CuFe2O4­) yang selanjutnya diaplikasikan sebagai antibakteri. Nanopartikel tembaga ferit (NTF) telah disintesis dengan memadukan metode green sintesis dan hidrotermal. Ekstrak daun gambir (Uncaria gambir Roxb) digunakan sebagai capping agent dalam penelitian ini. Hasil analisis XRD memberikan informasi bahwa NTFyang disintesis dengan penambahan ekstrak daun gambir dan NaOH serta dengan penambahan NaOH saja pH 12 suhu 180˚C selama 8 jam berfase kubik. NTF yang disintesis dengan penambahan ekstrak daun gambir dan NaOH pH 12 suhu 180˚C selama 8 jam memiliki ukuran paling kecil yaitu 24nm. Dari hasil fotograf SEM diketahui NTF yang disintesis pada suhu 180˚C selama 8 jam pH 12 berbentuk spheric dan masih ada yang teraglomerasi. Nanopartikel tembaga ferit yang disintesis diaplikasikan pada bakteri gram positif (S.aureus) dan gram negatif (E.coli) menggunakan metode difusi sumuran. NTF yang disintesis pada suhu 180˚C selama 8 jam pH 10 dan 12 efektif menghambat pertumbuhan bakteri E. coli dan S. aureus.
ANALISIS SEKTROSKOPI INFRA MERAH DAN MORFOLOGI PADA KOMPOSIT POLIETILENA/KARET ALAM SIKLIS/PRECIPITATED CALCIUM CARBONATE YANG DIHASILKAN MELALUI METODE SISTEM PELARUT Ahmad Hafizullah Ritonga; Novesar Jamarun; Syukri Arief; Hermansyah Aziz; Yulidar Laila Safitri; Suarnikan Hulu; Barita Aritonang
PROSIDING SEMINAR KIMIA Prosiding SNKT Himpunan Mahasiswa Kimia FMIPA UNMUL 2021
Publisher : PROSIDING SEMINAR KIMIA

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

Abstract

Pada penelitian ini, kami melaporkan bahwa komposit Linear Low-Density Polyethylene (LLDPE)/karet alam siklis(KAS)/precipitated calcium carbonate (PCC) telah berhasil diperoleh melalui metode sistem pelarut. Penelitian inibertujuan untuk menganalisis perubahan gugus fungsi dengan fourier transform infrared (FTIR) dan mengkarakterisasisifat morfologinya dengan scanning elctron microscope (SEM) pada komposit LLDPE/KAS/PCC. Komposit ini dibuatmelalui metode pencampuran dengan sistem pelarut dengan adanya kompatibiliser LLDPE-g-AO. LLDPE, KAS, danLLDPE-g-AO dimasukkan secara bersama-sama ke dalam gelas beaker yang berisi pelarut xylene sebanyak 100 mL,diaduk hingga larut pada suhu 140 oC, lalu ditambahkan dengan bahan pengisi PCC sambil diaduk selama 10 menitagar PCC terdispersi merata. Hasil spektrum FTIR komposit polimer menunjukkan bahwa pita khas dari PCC terlihatpada daerah 872,1 cm-1. Hasil morfologi dengan SEM menunjukkan adanya perubahan signifikan pada strukturpermukaan pada komposit polimer setelah penambahan bahan pengisi PCC.Kata kunci : Komposit, PCC, LLDPE, KAS, Sistem Pelarut.
SIFAT MEKANIK DARI BIOKOMPOSIT FILM PATI UBI KAYU DENGAN PENGUAT SERAT AKAR BUAH NAGA (HYLOCEREUS POLYRHIZUS) Melbi Mahardika; Hairul Abral; Anwar Kasim; Syukri Arief; Mochamad Asrofi
ROTOR Vol 10 No 2 (2017)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (242.321 KB) | DOI: 10.19184/rotor.v10i2.5579

Abstract

Dragon fruit root fiber used as a reinforcement in the biocomposites film of cassava starch. The production method of biocomposites film was solution casting. The cassava starch serves as the matrix in the biocomposites film. The variation of amount fiber in matrix was 2, 4 and 6% from dry starch weight basis. Isolation of dragon fruit root fiber used alkalization and bleaching process with NaOH, NaClO2 and CH3COOH, respectively. Glycerol was used as plasticizers. Mechanical properties of biocomposites was determined by tensile test. The result shows that, tensile strength increased 200% after the addition of 6% fiber compared to pure starch film. Tensile test data was supported by X-Ray Difraction (XRD). Keywords: Biocomposite, Cassava Starch, Dragon fruit root fiber, Mechanical properties, XRD.
PENGARUH KONDISI KALSINASI PADA SINTESIS SENYAWA HYDROXYAPATITE Lisa Utami; Syukri Arief; Novesar Jamarun
Sistem Informasi Vol 2 No 1 (2011): Jurnal Photon
Publisher : LPPM Universitas Muhammadiyah Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jp.v2i1.121

Abstract

Kalsium fosfat telah menjadi perhatian yang menarik dalam bidang medis dan kedokteran karena biocompatibilitynya yang baik dan struktur serta komposisi kimianya yang sama dengan fasa mineral jaringan keras manusia (tulang dan gigi). Penelitian ini difoukuskan untuk mempelajari faktor yang mempengaruhi morfologi dan komposisi fasa dari senyawa hydroxyapatite dengan menggunakan prekusor diammonium hydrogen phosphate sebagai sumber fosfat serta pengaruh kalsinasi pada suhu 200, 400, 600, 800 dan 1000oC. Produk hidroxyapatite yang dihasilkan dikarakterisasi dengan FTIR, XRD, SEM dan TGA. Hidroxyapatite yang dihasilkan dengan variasi suhu kalsinasi mempengaruhi morfologi dan komposisi fasa dari senyawa kalsium fosfat yang dihasilkan. Fasa yang terbentuk sebelum sampel powder fosfat dikalsinasi dengan (NH4)2HPO4 sebagai sumber fosfat adalah Ca2P2O7.2H2O dengan ukuran kristal 67 nm. Ketika sampel powder kalsium fosfat dikalsinasi pada temperatur 600˚C fasa yang terbentuk dengan menggunakan (NH4)2HPO4 sebagai sumber fosfat adalah hydroxiapatite (HAP) dengan ukuran kristal 8,66 nm Dan ketika sampel dikalsinasi pada temperatur 1000˚C fasa yang dihasilkan yaitu Ca2P2O7 dan Ca3(PO4)2.
Co-Authors -, Emdeniz -, Rahmayeni -, Rianda -, Yulfitrin . Darwison . Syukri Abdi Dharma Abral, Hairul Ade saputra Ade Saputra Adlis Santoni Admi Admin Alief Admin Alif Admin Alif Admin Alif Admin Alif Admin Alif Ahmad Hafizullah Ritonga Aju Deska Alif, Admin Alif, Admin Alif, Admin Amelia Amir Anggresani, Lia Anwar Kasim Ariadi Hazmi Aritonang, Barita Astuti Astuti Aulia Arivin Billah Aulia Aulia Baharuddin Shaleh Boy Isfa Boy isfa Budi Hermawan BUSTANUL ARIFIN Denny Akbar Tanjung Denny Akbar Tanjung Desfitri, Erda Rahmilaila Deswati Deswati Devi Pebrina Eka Putra Waldi Ellyta Sari Emdeniz - Emriadi - Erda Rahmilaila Desfitri Evi Adhelina Fatiha, Widya Yuliani Fitri, Ernarisa Hamdi, Hayatul Hary Sanjaya Hayatul Hamdi Herlin Oktavani Hermansyah Aziz Hermawan, Budi ihda khaira Kazuhiro Manseki Khoirul Amru Kusuma, Theresia Sita Lestari Ningsih Lia Anggresani Lisa Utami Lisa Utami Lusi Puspitasari M. H. Ahmad Mahardika, Melbi Mai Efdi Mai Efdi Maria Erna Maria Erna Maria Erna Kustyawati Matlal Fajri Alif Melbi Mahardika Mirzah Mirzah Mochamad Asrofi Mohd Hafizi Ahmad Mohd Jain Noordin Muhammad Rizki Mulyati Sukma Naldi, Nofri Nancy Willian Nengsih, Zarnida Widia Neswati Neswati Nofri Naldi Novesar Jamarun Novesar Jamarun Novizar Nazir Oktavani, Herlin Olly Norita Tetra Putri Perdana Roza Radiatun Mardiah Rahadian Zainul Rahayu Rahayu Reni Desmiarti Reni Desmiarti Restina Bemis Restina Bemis, Restina Rianda - Rianda Rizal Rini Ramadhani Risma Sari Rosadi, Maulana Yusup Roza, Putri Perdana Rudy Fernandez Safni Safni Selfa Dewati Samah Sestry Misfadhila Shaleh, Baharuddin Sry Wahyuni Suarnikan Hulu Suci Auliya Rahmi Elsya Sumaryati Syukur Suryati Suryati Syukri Syukri Syukri Takashi Sugiura Theresia Sita Kusuma Upita Septiani Upita Septiani Usna, Sri Rahayu Alfitri Widya Yuliani Fatiha Yeni Stiadi Yessi Rahmayani Yestria Rilda Yetria Rilda Yetti Marlida Yulfitrin - Yulidar Laila Safitri Yulizar Yusuf Yurniwati Yurniwati Zilfa Zilfa Zulhadjri Zulhadjri