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All Journal Jurnal Sains dan Teknologi Jurnal Sains Materi Indonesia Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Untirta Civic Education Journal Jurnal Sains dan Teknologi: Jurnal Keilmuan dan Aplikasi Teknologi Industri Jurnal Pengabdian Magister Pendidikan IPA Jurnal Abdi Ilmu Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya JURNAL PENDIDIKAN MIPA GANDRUNG: Jurnal Pengabdian Kepada Masyarakat Budapest International Research and Critics Institute-Journal (BIRCI-Journal): Humanities and Social Sciences International Journal Of Science, Technology & Management (IJSTM) Journal of Bioprocess Chemical and Environmental Engineering Science International Journal of Economic, Business, Accounting, Agriculture Management and Sharia Administration (IJEBAS) Journal Of Business, Finance, and Economics (JBFE) Abdimas Awang Long: Jurnal Pengabdian dan Pemberdayaan Masyarakat Journal of Social Empowerment Gemilang: Jurnal Manajemen dan Akuntansi Optimal: Jurnal Ekonomi dan Manajemen Smart Techno (Smart Technology, Informatic and Technopreneurship) Biner : Jurnal Ilmu Komputer, Teknik dan Multimedia AMMA : Jurnal Pengabdian Masyarakat International Journal of Economic Research and Financial Accounting Anggaran: Jurnal Publikasi Ekonomi dan Akuntansi Masterpiece Journal Society Service Insight Journal of Business Integration Competitive Journal of Finance Integration and Business Independence Jurnal Mahkota Bisnis (Makbis) Proceeding of The International Conference on Social Sciences and Humanities Innovation Proceeding of The International Conference on Management, Entrepreneurship, and Business
Ahmad Fadli
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Pembuatan Macroporous Microcarrier Berbahan Baku Hydroxyapatite Menggunakan Kuning Telur Sebagai Agen Pembentuk Pori Dwi Yerlis Rahmi; Ahmad Fadli; Idral Amri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Porous hydroxyapatite is a crystalline molecule composed of calcium and phosphorus which can be used as a macroporous microcarrier. Macroporoous microcarrier is one of tissue engineering technology that consist of support matrix and can be used as a cell culture medium in bioreactor. Protein foaming-starch consolidation method is choosed for manufacturing porous hydroxyapatite with egg yolk as a pore-forming agent. The purpose of this research is to study the influence of process variables i.e yolk addition (27 - 33 gr), sintering temperature (1200oC - 1300oC), and drying temperature (170oC - 190oC) toward porous hydroxyapatite properties such as compressive strenght, porosity and pore size made by protein foaming – starch consolidation methode. The experimental resulted porous hydroxyapatite with compressive strength in range of 4.55 - 11.05 MPa, porosity in rang of 25.95 - 58.74% and pore size in range of 15.08 - 33.56 μm.Keywords: compressive strength, pore size, porosity, porous ceramic
Kinetika Sintesis Hidroksiapatit Menggunakan Metode Hidrotermal Suhu Rendah Dengan Pendekatan Shrinking Core Model Nurul Afifah; Ahmad Fadli; Edy Saputra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Hydroxyapatite (HA) is a ceramic that can be used as bone implants and teeth. Hydroxyapatite can be synthesized from Calcium Oxyde (CaO) commercial reacted by ammonium dihydrogen phosphate (NH4H2PO4). The purpose of this research are to determine the effect of time and temperature on characteristic of HA synthesis by low temperature hydrothermal method as well as to determine the kinetics model of HA synthesis by using the approach of shrinking core models. There are 3 models are used, the diffusion through liquid film, diffusion through HA layer, and chemical reactions. The procedure was started with synthesized 36.9 gr NH4H2PO4 was dissolved in 600 mL of water and then added 30 gr CaO with temperature of 70°C, 80°C, 90°C and reaction time of 10 minutes - 480 minutes. The mixture was stirred rate of 300 rpm until paste formed. Then the paste was dried in the oven at temperature 120°C for 12 hours and calcined at a temperature of 900oC for 1 hour. The results of this research showed that obtained products were containing 97% HA. The best of kinetic model that described HA synthesis was model of diffusion through HA layer , with formula:Keywords: hydroxyapatite, hydrothermal, CaO, kinetics model, shrinking core.
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
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

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
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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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
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
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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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
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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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.
Co-Authors Abdul Kohar Abdul Malik K.A Abdul Rasyid Achmad Noerkhaerin Putra Adam Samsudin Noor Ade Pratama Adela Shofia Addabsi Adha Widoni Adi Maulana Putra Adi Mulyadi Putra Adrianto Ahmad Aep Saefullah Afrila Afrila Agung Prabowo Agung Prabowo Agus Susanto Agya Mutia Alifta Ahmad Aguswin Ahmad Fadhil Nugroho Ahmad Riadi S Hasibuan Ahmad Rivai Ahmad Zaki Ahsanul Haq Akhmad Akromusyuhada Akhmad, Akhmad Alfarisi, Cory Dian Alfi Sapitri Allailus Syah Safara Amin Hou Amirullah Amun Amri Andi Risfan Rizaldi Andre , Jessica Annisa Aprilya Putri Annisa Rahmat Ap’aluddin Ari Aditia Sukma Sukma Arifin Setiabudi Arisky Rahmatulloh Armawansya Arosyidin Arosyidin Aslan Syah Mattulanreng Aulia Permatasari Ayu Kartika Bahruddin Beby Karina F. Sembiring Benny Ahmadi Bima Wandika Putra Cahyo Dwi Rachmadi Calvin Prasetyo Chaniago, Sabaruddin Charismayani Charismayani Chorina Ika Ristanti Damayanti, Elok Debora Tambunan Deni Astika Denny Satria Derry Hanriansyah Pratama Deska Deska Deva Djohan Devia Febrina Dewi Indah Pratiwi Dewi Rafiah Pakpahan Dhamala Shobita Chandra Dhanang Hayuningwang Dingot Hamonangan Sitanggang Dion Julio Iskandar Dovy Reyandi Drastinawati Drastinawati Dwi Yerlis Rahmi Edy Saputra Elvira Sitna Hajar Emizatul Aini Ervina Ervina Ester Hervina Sihombing Esty Octiana Sari Fachry Abda El Rahman Fadhil Mubarak Fajril Akbar Fernando Susilo Fisy Amalia Gading Bagus Mahardika Gede Indra Ludy Wirata Gunawan Atmaja Halim Wijaya Heni Sugesti Herry Novriansyah I Wayan Sudiarta Idral Amri Ihsan Effendi Ika Agustina Ika Karina Ika Puspa Satriany Ilham Habib Indah Fitriani Indra Yasri Indrawan Indrawan Ines Indriyani Irdoni HS Irdoni Irdoni Irwan Ahussalim Jabosar Ronggur Hamonangan Panjaitan Jannatin Ardhuha Jayaun Jayaun Jenial S Jenni Kristina Br Panjaitan Julharmito Julharmito Junaidi Junaidi Kania Farida Komalasari Komalasari LALU RUDYAT TELLY SAVALAS Lathifah Cahyani P3 Lia Yuningsih Lilis Suriani Listari, Nening Luci Octaria M Satria Haruda M. Ferdinansyah M. Zamroni Mahendra Aswit Sandra Barata Manda Dwipayani Bhastary Marlinda Martin Maya Andiriani MAYANG SARI Mega Safana Mega Sanjaya Melda Helena S Miftah Anugrah Mochamad Reizal Ath Thariq Moh. Tahang Mona Lisa Muchlis Ade Putra Muh Irwan Muh. Sabir Muhamad Hendri Diarta Muhamamad Rizky Zuriadi Muhammad Hamdani Muhammad Qasim Hamzah Mustika Canra MUTIARANI MUTIARANI Nanda Nabila Maharani Nasib Nasrudin Nisa Mulya Nissa Aqhilla Novika Sri Wardani Novirsari, Emma Nuraina Siregar Nurjamilah Nursyaniati Nursyaniati Nurul Afifah Nurul Azmi Nurul Syafiqah Azman Ongky Alexander Opik Hidayat Abdul Latif Padil Pancasila Putri Peter Peter Puji Rahayu Purnama Sari Putri Arini Putri Julia Maemum Putri Rahmadani Rahmad Rasyidin Ramadani Pardian Ramadhana Eka Rani Handayani Rathesa Najela Ratih Amelia Rawdatul Fadila Reny Novianti Ridho Hafizh Maulana Ridho Wijaya Riki Rahmadhan Rio Andika Rizky Gimnastiar Robin Roni Juliansyah Rozanna Sri Irianty Rusydy ' Sai Vinodhini Samsoni Samsoni Septiana Veronika S Septianing Tyas K Silvia Reni Renti Silvia Reni Yenti Silvia Reni Yenty Sintia Siska Priscillia Aledya Siti Chotijah Siti Nurkhaliza Siti Wardatul Jannah Sri Murda Niati Subkhan Maulana Sunarno Sunarno Syafrizal Helmi Situmorang Syarifuddin Oko Syelvia Renni Yenti Thomson Simanjuntak Thufail Mujaddid Al-Qoyim Tina Linda Toni Ardi Ulfa Dwiyanti Ulfah Naida Marbun Vivi Asfianti Wan Elsa Novtari Adiani Wasty Rusjaya Widy Hastuty Widy Hastuty HS Wilda Zakiah Wiriyan Jordy Wyda N Saragi Yelmida Azis Yesi Afriani Yopy Ratna Dewanti Yuli S Yunus Olivia Novanto Zubair Arza Zuchra Helwani Zultiniar Zultiniar