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All Journal Jurnal Sains dan Teknologi Jurnal Sains Materi Indonesia Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Jurnal Ilmiah Pertanian Indonesian Journal of Chemistry JMM (Jurnal Masyarakat Mandiri) Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Unri Conference Series: Community Engagement Indonesian Journal of Chemical Science and Technology Journal of Applied Materials and Technology Journal of Bioprocess Chemical and Environmental Engineering Science Journal of Community Engagement Research for Sustainability Indonesian Journal of Fundamental Sciences Komunita: Jurnal Pengabdian dan Pemberdayaan Masyarakat
Ahmad Fadli
Universitas Riau
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Sintesis Partikel Komposit Magnetit/Hidroksiapatit Menggunakan Metode Hidrotermal Lilis Suriani; Ahmad Fadli; Fajril Akbar
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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Magnetite/hydroxyapatite composites can be applied in biomedical fields such as drug delivery, orthopedics, protein adsorption/release, hyperthermia therapy, and solid phase extraction from plasmid DNA. The purpose of this study was to study the effect of reaction temperature and hydroxyapatite ratio on the crystallinity, crystal size, particle size, magnetism and morphology of the composites of magnetite/hydroxyapatite synthesized using the hydrothermal method. Composites were synthesized from 2 mmol of FeCl3, 4 mmol of citrate and 6 mmol of urea which were dissolved in 40 ml of distilled water and stirred at 300 ppm using a magnetic stirrer for 15 minutes, then added 7.5 g/L polyethylene glycol and commercial hydroxyapatite of various concentrations (70%, 80% and 90%) and stirred again for 1 hour. Then the suspension was put into a hydrothermal container and in the oven at a temperature of 200oC, 220oC, and 240oC for 12 hours. The magnetite/hydroxyapatite composite particles obtained were then characterized by X-ray Diffraction (XRD), and Vibrating Sample Magnetometer (VSM). The magnetite particles produced are cubicly shaped and hydroxyapatite were hexagonally shaped. The increase in reaction temperature from 200 oC to 240oC at the concentration of magnetite are 10% increased the crystals size of magnetite from 22,87 nm to 24,162 nm and crystal size of hydroxyapatite increased from 26,456 nm to 27,8 nm. While the increase in the concentration of magnetite in composite from 10% and 30% at 240oC increased the crystal size of magnetite from 24,162 nm to 27,472 nm, decreased the crystal size of hydroxyapatite from 27,8 nm to 26,288 nm. Magnetite/hydroxyapatite composite were superparamagnetic with coercivity 0,2 Oe and saturation magnetization (Ms) 4,2 emu/g. Keywords: composite, drug delivery system, hydrothermal, hydroxyapatite, magnetite
Sintesis Hidroksiapatit Menggunakan Metode Wet Mechanochemical Dengan Variasi Waktu Reaksi Dan Rasio Bola Penggiling Rawdatul Fadila; Ahmad Fadli; Syelvia Renni Yenti
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Hydroxyapatite (Ca10(PO4)6(OH)2) is used in various biomedical applications because it has excellent biocompatibility and bioactive properties. The purpose of this study was to synthesize hydroxyapatite powder using the wet mechanochemical method and determine the effect of reaction time and the ratio of the grinding ball to the results of hydroxyapatite synthesis. At first mix CaO with a weight of 0.5 gr and NH4H2PO4 as much 0.615 gr with a Ca/P ratio of 1.67 then added with 10 ml of distilled water, and milling for 2, 4 and 6 hours with a time interval every 15 minutes stopping 5 minutes, using milled balls with the ratio of grinding balls between small milled balls (diameter of 0.3 cm) with large milled balls (diameter of 0.6 cm) are 1: 1, 1: 3, and 3: 1, with a total of 20 ball points. The results of the slurry formed were dried in an oven at 120oC and calcined at 900oC for 1 hour. The hydroxyapatite powder produced was characterized by XRD, SEM-EDX, BET and PSA. The longer reaction time of 2, 4 and 6 hours in hydroxyapatite synthesis increased the crystallinity of the samples is 86.3%, 91.5% and 95.9%. The form of hydroxyapatite is an agglomerate. The size of the hydroxyapatite powder particles produced at 6 hours with a ratio of small balls and large balls 3: 1 analyzed by PSA is 320.6 nm. The surface area of hydroxyapatite powder at 6 hours with the ratio of milled balls between small balls (diameter of 0.3 cm) and large balls (diameter of 0.6 cm) 1: 1 and 3: 1 are 18,818 m2 / gr and 5,517 m2 / gr. The morphology of HA formed is granular with a Ca/P 1.61 ratioKeywords : ball mill, hydroxyapatite, mechanochemical,
Pemanfaatan Limbah Abu Terbang (Fly Ash) Batu Bara Sebagai Bahan Campuran Beton Geopolimer Julharmito Julharmito; Ahmad Fadli; Drastinawati Drastinawati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
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Fly ash can be used in the manufacture of concrete geopolimer. The replacement of the use of cement with fly ash can reduce the cost of manufacture of concrete and can reduce global warming posed from the production of cement. This research aims to know the influence of the use of fly ash, variations in concentrations of KOH and Na2SiO3/KOH ratio relationships against the concrete compressive strength of concrete geopolimer and test the level of immobilisasi of heavy metals contained in concrete geopolimer. Geopolimer synthesized from fly ash using a mixed solution of KOH and Na2SiO3. The solution is prepared the day before use. Initially prepared a solution of KOH with concentrations of 8 M, 10 M, 12 M, 15 M and Na2SiO3/KOH ratio 0.8; 1.2; 1.6; 2.0. These materials are mixed while stirring and inserted into the mold cylinder diameter 4 cm height 8 cm. Batter the already hardened issued and in the dry at a temperature of 80оC for 24 hours, then the samples were dried at room temperature for 21 days, then performed a test of strong press, porosity and heavy metal content. Test result showed a strong increase with added press Molarity KOH and Na2SiO3/KOH ratio, strongly press the highest 30.26 MPa produced on the molar ratio of 14 m and Na2SiO3 KOH/KOH 2.0. Instead, the porosity obtained decreased with increasing molar NaOH and KOH Na2SiO3/ratio. The lowest porosity 6.49% obtained in Molarity KOH 14 and Na2SiO3/KOH ratio is 2.0. Concrete geopolimer able to immobilize heavy metals found in the fly ash with either. Metal Pb reduced from 8,954 mg/L be 0.66 mg/L, the metal Cr reduced from 6,978 mg/L be 2.096 mg/L, Cu Metal reduced from 12.355 mg/L be 7.350 mg/l. so as to meet the Government Regulation Number 101 by 2014.Key word: geopolimer concrete, fly ash, activator solution
Pengaruh Penambahan Hidroksiapatit Dan Waktu Pencelupan Terhadap Pelapisan Logam Stainless Steel 316L Dengan Metode Dip Coating Nisa Mulya; Ahmad Fadli; Amun Amri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
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Stainless Steel 316L is metal that can be used as a bone plate, but it has low biocompatibility. To improve the biocompatibility Stainless Steel 316L coating hydroxyapatite is used. Thepurpose of this research was to study the effect of hydroxyapatite addition and dipping time on characterization of Stainless Steel 316L coated with HAp using Dip Coating Method. Metal with a size of 2x1x0,1 cm was dipped into a suspension containing HAp, sago starch and water that mixed with a rate of 150 rpm for 20 hours. The coating was done by varying the addition HAp 8, 10, 12 gr and dipping time of 2, 6, 10 seconds. The dipped Stainless Steel 316L was dried in oven at temperature 110 °C for 10 minutes. Coating HAp were sintered at temperature 800 °C for 1 hour. The research showed with increased HAp addition and dipping time the thickness of the coating HAp increased. With maximum shear strength obtained in this research is 0,24433 MPa.Keywords : Coating, Dip Coating, Hydroxyapatite and Stainless Steel 316L
Pengaruh Kadar Minyak Kelapa Terhadap Morfologi Sifat Thermoset Rubber Dengan Filler Abu Sawit - Carbon Black Afrila Afrila; Bahruddin Bahruddin; Ahmad Fadli
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
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Plasticizer and filler have important role to making thermoset rubber. The function of plasticizer is to assist spreading process of filler in rubber and to improve elasticity of thermoset rubber. Meanwhile function of filler is to increase mechanical properties of thermoset rubber. The purpose of this study is to obtain the best conditions of the vulcanization process in the manufacture of thermoset rubber with coconut oil as plasticizer and fly ash/carbon black as filler hybrid, whichis the variation of cococnut oil content are 2,5 phr, 5 phr and 7,5 phr and filler hybrid FA/CB content are 30 and 50 phr with ratio 100/0 , 50/50 and 30/70. The results of thermoset rubber will be tested, it’s mecanical properties such as tensile strength, elongation at break, tension set, abrasion, hardness, and water absorption also thermoset rubber morphology. Based on average yield mecanical properties and morphology tested is obtained that the best conditions vulcanizationprocess is thermoset rubber with coconut oil content 5 phr and filler hybrid content of 30 phr with ratio FA/CB of 30/70. The best mechanical properties was given on tensile strength 24,8 MPa, elongation at break 816 %, tension set 2,17%, hardness 54±5 shore A, abrasion resistance 0,14 mm3/kg and also for water absorption 0,59%Keyword : Carbon Black, Fly Ash, Filler, Plasticizer, Thermoset Rubber, Vulcanization
Pengaruh Penambahan Dispersant Dan Waktu Pengadukan Pada Pembuatan Scaffold Hidroksiapatit Menggunakan Sabut Gambas Sebagai Template Heni ' Ismawati; Ahmad ' Fadli; Fajril ' Akbar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
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Hidroxyapatite (HA) scaffold has been widely applied in the biomedical field especially for bone implants. The purpose of this research is to determine the Influence of dispersant addition and stirring time on HA scaffold which formed using gambas sponges as template. HA slurry was made by mixing 10 grams of HA, 12 grams of aquadest, 0.2; 0.25; 0.3 grams of Darvan 821A and 1 gram of sago. Slurry was impregnated into gambas sponges. Sample then dried at 110oC for 3 hours. The green bodies was burned at 600oC for 1 hour and followed by sintering at 1250oC for 1 hour. The results showed that addition of dispersant and increasing of stirring time lead to smaller porosity and shrinkage. In addition 0,2; 0,25; and 0,3 grams dispersant, the resulting porosity in the range of 63.85-70.78%; 58.74-70.35%; and 53.42-69.66%. Shrinkage 39.43-53.71%; 27.75-50.68%; and 13.61-41.25%. Compressive strength 0.61-1.05 MPa; 2.88-3.81MPa; and 0.52-2.96 MPa. The macroporous and microporous average pore sized were 50 μm dan 5 μm.Keywords: bone implant; dispersant; gambas; hidroxyapatite; scaffold
Pembuatan Silika High Grade Dari Fly Ash Sawit Dengan Proses Ekstraksi Dan Cation Exchange Ahmad Zaki; Edy Saputra; Ahmad Fadli
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
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One alternative raw materials manufacture of high grade silica is using palm oil mill fly ash. This research aimed to study the effect of temperatureprocess, time and the ratio mass of zeolite and obtain optimum conditions cation exchange process (Fe) in a solution of sodium silicate with raw material palm oil mill fly ash. Palm oil mill fly ash is heated using oven at 105° C for 24 hours. Then fly ash reacted with 1,4N NaOH solution at 105° C for 50 minutes. Then obtained sodium silicate solution is reacted with Na-zeolite. The results of the optimization then precipitated using 10% H2SO4 and derived solidsilica. XRF analysis results showed solid silica has a purity of 96.129%.Keyword:Precipitation, Zeolite
Kinetika Reaksi Demineralisasi Pada Isolasi Kitin Dari Limbah Cangkang Udang Industri Ebi Ika Karina; Ahmad Fadli; Drastinawati Drastinawati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
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Chitin is natural polymer which used in biomedic sector mainly for injury healing, suture and dietery because chitin has antibacterial, antifungal and antiviral properties. Chitin content in natural material can be isolated using deproteinasi and demineralization process. This research objection is to determine demineralization reaction kinetics in chitin isolation with temperature and shrimp shell powder to HCl solution ratio. This research is started with 50 gr shrimp shell powder with 1 N HCl solution then heated with temperature such as 40°C and shrimp shell powder to HCl solution ratio such as 1:5, 1:10, 1:15 and 1:20 (gr/ml). Sample is taken with time interval 5, 10 and 15 minutes as much as 20 ml and washed until neutral pH. Next, sample is filtered using filter paper and then the solid part is analyzed in complexometry titration. Research result shows that reaction kinetics following pseudo second order and increasing of k value in a row of temperature increase is 0,00002 menit-1. Reaction rate constant in shrimp shell powder and HCl 1:5 (gr/ml) ratio is 0,000012 and increase to 0,00155 when ratio 1:20 (gr/ml) at 70oC.Key words : chitin, demineralization, kinetic reaction, polymer
Sintesis Coating Copper-Cobalt Oksida Pada Substrat Aluminium Melalui Proses Sol Gel Sebagai Solar Selective Absorber : Pengaruh Rasio Molar Cu/Co Dan Ketebalan Coating Peter Peter; Amun Amri; Ahmad Fadli
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
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Solar selective absorber (SSA) is a layer which is selective to absorb solar radiation and convert it into maximum heat energy. The purpose of this research is to synthesize the SSA based on copper nitrate and cobalt nitrate precursor, to determine the influence of molar ratio and dipping times number to absorptance, and emittance of SSA using the sol gel dip coating method.. Aluminum plates with size of 2x4cm2 were cleaned using phosphoric acid 10% by volume at temperature ±50oC for 10 minutes and then washed again with distilled water. Sol precursor was prepared by mixing copper nitrate and cobalt nitrate in ethanol solvent and the addition of propionic acid as catalyst and complexing agent. This solution was stirred at room temperature for 2 hours. The coatings were synthesized by varying molar ratio of [Cu]/[Co] of 0,25; 1; and 4 with the number of dipping 1-10 times. The coatings then were annealed at temperature of 550oC for 1 hour. Reflectance spectra in the UV-Vis-NIR show that an increasing number of dipping and decreasing in the molar ratio of [Cu]/[Co] improved the absorptance (). SSA layer with best absorptance i.e. 84,788% is synthesized using precursors with a molar ratio of 4 at 10 dipping times, and emittance (ε) generated amount 8,999%.Keywords : aluminum, dip coating, solar selective absorber.
Pelepasan Doxorubicin (DOX) Dari Hidroksiapatit (HA) Dengan Variasi Nilai pH Dan Rasio Dox-Ha / Phosphat Buffer Saline (PBS) Nursyaniati Nursyaniati; Ahmad Fadli; Rozanna Sri Irianty
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
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Hydroxyapatite was a material that could be used as drug delivery in cancer by doxorubicin adsorbed on to hydroxyapatities surface. The purpose of this research were to study the effect of variation of pH and ratio DOX-HA : PBS on speed release. HA was suspended in 10 ml of DOX (100 ppm) strirred using a magnetic stirrer with speed 250 rpm at temperature 37ºC for 24 hours. After that it filtered at vacuum pressure for 24 hours. The release of DOX from 270 mg HA powder were soaked in 350 ml of solution PBS (pH 5,6 dan 7,4). The samples were taken every two hours until 120 hours. The concentration of DOX’s released were analyzed by UV-Vis. Furthermore, the DOX-HA powder were characterized with FTIR. There was HA and DOX function group which meant, there were any DOX’s adsorbed and released from HA used powder. If higher pH and more HA powder were used, would effect the released of DOX were more effective. The released in the first 40 hours of DOX concentration released in PBS was maintained at 1,25 and 6,92 ppm for each pH 7,4 and 5,6. While for mass HA variations maintained at 0,625; 3,541; 4,508; and 4,958 ppm for each 0,2; 0,3; 0,4 dan 0,5 gram.Keywords : doxorubicin, drug delivery, hydroxyapatite, phosphat buffered saline, release.
Co-Authors Abdul Rasyid Achmad Noerkhaerin Putra Ade Pratama Adela Shofia Addabsi Adha Widoni Adi Maulana Putra Adi Mulyadi Putra Adrianto Ahmad Afrila Afrila Agung Prabowo Agung Prabowo Agung Prabowo Agung Prabowo Ahmad Riadi S Hasibuan Ahmad Zaki Alfarisi, Cory Dian Allailus Syah Safara Allailus Syah Safara Alltop Amri Ya Habib Amun Amri Annisa Aprilya Putri Annisa Rahmat Ari Aditia Sukma Sukma Arisman Adnan Ariya Eka Alel Arosyidin Arosyidin Aulia Permatasari Aulia Permatasari Bahruddin Bahruddin Benny Ahmadi Bima Wandika Putra Charismayani Charismayani Damayanti, Elok Debora Tambunan Deden Saprudin Deni Astika Deni Noviana Derry Hanriansyah Pratama Deska Deska Dewi Indah Pratiwi Dhamala Shobita Chandra Dhanang Hayuningwang Dion Julio Iskandar Dovy Reyandi Drastinawati Drastinawati Drastinawati Drastinawati Dwi Yerlis Rahmi Edy Saputra Ervina Ervina Esty Octiana Sari Esty Octiana Sari Fachry Abda El Rahman Fadhil Mubarak Fajril ' Akbar Fajril Akbar Feblil Huda Ferdy Ashari Syawal Fernando Susilo Gading Bagus Mahardika Gede Indra Ludy Wirata Heni ' Ismawati Heni Ismawati Heni Sugesti Herry Novriansyah Idral Amri Ika Karina Ilham Habib Indah Fitriani Indra Purnama Indra Yasri Ines Indriyani Irdoni HS Irdoni Irdoni Iwantono Iwan Barnawi Jabosar Ronggur Hamonangan Panjaitan Jenial S Julharmito Julharmito Komalasari Komalasari Lia Yuningsih Lilis Suriani Luci Octaria M Satria Haruda Marlinda MAYANG SARI Mayangsari Mayangsari Melda Helena S Miftah Anugrah Mochamad Reizal Ath Thariq Muchlis Ade Putra Muh Irwan Muhamamad Rizky Zuriadi Muhammad Hamdani Muhammad Reski Muhammad Syafiq Izzuddin Mustika Canra Mutamima, Anisa Nisa Mulya Nissa Aqhilla Novika Sri Wardani Nuraina Siregar Nurfajriani Nurfajriani Nurfatihayati Nursyaniati Nursyaniati Nurul Afifah Ongky Alexander Ongky Alexander Padil Padil Panca Setia Utama Pancasila Putri Peter Peter Prihartini Widiyanti Putri Arini Putri Rahmadani Rahimah Rahimah Rahmad Rasyidin Rani Handayani Rathesa Najela Rawdatul Fadila Ridho Wijaya Riki Rahmadhan Rio Andika Ririn Puji Hastuti Rozanna Sri Irianty Rusydy Rusydy ' Septiana Veronika S Silvia Reni Renti Silvia Reni Yenti Silvia Reni Yenti Silvia Reni Yenti Silvia Reni Yenty Siska Priscillia Aledya Siti Chotijah Sri Murda Niati Sri Murda Niati Subkhan Maulana Suhendri Sukoco Sukoco Sukoco Sukoco Sunarno Sunarno Sunarno Sunarno Syarifuddin Oko Syelvia Renni Yenti Thomson Simanjuntak Toni Ardi Ulfah Naida Marbun Wan Elsa Novtari Adiani Wasty Rusjaya Wilda Zakiah Wiriyan Jordy Wisrayetti Wisrayetti Wisrayetti Wisrayetti Wisrayetti Wisrayetti Wyda N Saragi Yelmida Azis Yelmida Aziz Yesi Afriani Yogi Yolanda Yunus Olivia Novanto Zakwan Zuchra Helwani Zultiniar Zultiniar Zultiniar Zultiniar Zultiniar Zultiniar