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All Journal Jurnal Sains dan Teknologi Komunikasi Fisika Indonesia Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Jurnal Riset Kimia Jurnal Ilmiah Biosaintropis (Bioscience-Tropic) Jurnal Ilmiah Pertanian Science and Technology Indonesia Martabe : Jurnal Pengabdian Kepada Masyarakat Stannum : Jurnal Sains dan Terapan Kimia Jurnal Pengabdian Masyarakat Teknik Indonesian Journal of Chemical Science and Technology Journal of Applied Materials and Technology Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks Journal of Bioprocess Chemical and Environmental Engineering Science Jurnal Abdi Masyarakat Indonesia Journal of Community Engagement Research for Sustainability Komunita: Jurnal Pengabdian dan Pemberdayaan Masyarakat Jurnal Sains Materi Indonesia JURNAL REKAYASA KIMIA & LINGKUNGAN
Yelmida Azis
Department Of Chemical Engineering, Faculty Of Engineering, Universitas Riau
Agriculture, Biological Sciences & Forestry Arts 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 Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Pengaruh Temperatur Terhadap Kinetika Reaksi Pembentukan Hidroksiapatit (HAp) Dari Precipitated Calcium Carbonate (PCC) Cangkang Telur Itik Melalui Proses Presipitasi Hadrian Yonas Sebastian Napitupulu; Yelmida Azis; Komalasari Komalasari
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

Hydroxyapatite (Ca10(PO4)6(OH)2) is a calcium phosphate compound that has been widely used as a bone implant material due to its chemical composition is identical with natural bone. The aim of this research is to synthesized, characterized and studied the kinetics of hydroxyapatite synthesis reaction using PCC (Precipitated Calcium Carbonate) of duck egg shell by precipitation method. In this research the samples were taken every 10 minutes as much as 10 mL for 1 hour to determined the reaction kinetic. Then stirred for 24 hours with temperature variation (300C, 400C; 500C; 600C) and aged for 24 hours. The analysis of Ca concentration in filtrate was detected by using complexometri method. The synthesized hydroxyapatite was characterized by XRD and obtained a hexagonal crystalline structure with crystal size between 20 - 37 nm. The reactions kinetics of synthesized hydroxyapatite follows the pseudo first order equation with the value of reaction rate constant (k) is 0,0543 min-1; 0.0759 minutes-1; 0.1146 minutes-1; and 0.1597 minutes-1.Keywords: hydroxyapatite, reaction kinetics, PCC, duck egg shell, precipitation
Sintesis Hidroksiapatit Dari Precipitated Calcium Carbonate (PCC) Cangkang Telur Itik Melalui Proses Pengendapan Dengan Variasi Rasio Ca/P Dan Kecepatan Pengadukan Toni Arissaputra; Yelmida Yelmida; Fajril Akbar
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

Hydroxyapatite (HAp) is the most stable form of calcium phosphate and is widely applied in the medical field because it’s properties is similar to the components in certain organs of the human body such as bones and teeth. The aims of this study were to synthesis hydroxyapatite from duck egg shell by precipitation method, studied the effect of Ca/P molar ratio and stirring speed on the hydroxyapatite product and compare the result for such variable. Synthesis HAp was done by three steps. First step was calcination duck eggshell to CaO. Second step, made PCC (Precipitated Calcium Carbonate). Third step, synthesis HAp used precipitation method. Variables used were molar ratio Ca/P 1.67;1.77;1.87 and stirring speed 200, 250, 300 rpm. HAp product was analized by FTIR, XRD, SEM-EDX and BET. The best HAp product was produced at a Ca / P molar ratio and stirring rate at 1.67 and 300 rpm respectively. HAp crystals are hexagonal with a diameter of 23.086 nm. HAp has high purity without contaminated with any other elements and is in the form of agglomerates. The molar ratio of Ca / P results was obtained at 1.55 and the surface area of the HAp was 55.929 m2/g.Keywords : Calcium Phospate, Duck Eggshell, Hydroxyapatite, Precipitation, Synthesis.
Pemurnian Selulosa Alfa Pelepah Sawit Menggunakan Enzim Xylanase Caesari Caesari; Padil Padil; Yelmida Yelmida
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
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Midrib of palm oil is the most solid wastes which produced in oil palm plantations. Palm midrib is contained of 34.89% α-cellulose content percentage that can be improved with cooking using the extract solution ash of palm empty fruit bunches (Padil, 2010) and continued with the process of purification using xylanase enzyme. Higher content of Cellulose-α can be processed into a more commercially product. Cellulose-α> 92% qualified to be used as the main raw material (nitrocellulose) or making explosives and propellants. Stages of the purification process a palm midrib cellulose is extraction, hydrolysis, delignification and purification using xylanase enzyme with variations process is temperature (50, 60 and 70 ° C), enzyme dose (1, 2 and 3 ml) and the source of the enzyme (Aspergillus and Trichoderma sp so). Purification process operating conditions are: pH 5, time 90 minutes, the solid-solution 1:25. Content of purified cellulose-α increased to 96.60% for variable temperature at 60 ° C, 3 ml dose of enzymes and enzyme xylanase from Aspergillus sp. Keywords : Cellulose Alpha, Palm Midrib, Xylanase Enzyme
Studi Kinetika Reaksi Pada Proses Deasetilasi Kitin Dari Limbah Industri Ebi Jenial S; Ahmad Fadli; Yelmida Aziz
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
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Chitosan is used in a variety of industrial applications, such as purification agents, flocculation agents, anti-microbial agents, biological adhesives, anti-tumor agents and the cosmetic industry. This study studied deacetylation reaction kinetics and the effect of particle size difference on chitosan formation of chitin using raw materials of ebi industrial waste. Chitosan was obtained by deproteination, demineralization and deacetylation using 50% NaOH with a ratio of 1:20 (w / v) at a temperature of 80 ° C. Samples were analyzed using FTIR sprestroscopy and acid-base titration. The results showed the deacetylation degree at minute 120 for chitin diameter 0.25, 0.177, 0.152 mm were 51.51, 64.39, and 78.87%, respectively. The reaction mechanism is determined by model matching using the SSE value of the model against the value of the data obtained. From the result of approach done using the Shrinking Unreacted Core model it is known that the reaction is influenced by diffusivity. This corresponds to the value of the obtained diffusivity for each sample ranging from 0.25, 0.177 and 0.152 mm diameters respectively of 1.841. 10-18, 2.657. 10-18, and 3.085 .10-18 m2/s.Keywords : Deacetylation, reaction kinetics, chitosan, ebi’s waste, shrinking unreacted core model
Isolasi Lignin Dari Jerami Padi Dengan Metoda Klason Hotni Lamtiar; Elvi Yenie; Yelmida Yelmida
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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Abstract

Lignine is a complex polimer with high molecular weight which compiled of fenilpropane units. This study aims to know concentration of NaOH influence and delignification time of rice straw influence againts sucrose content of rice straw. Analysis of lignine purity using Klason Method. Isolation of waste rice straw are extraction, hydrolysis, delignification, and purity by using Klason Method. Extraction process be done on variety ofNaOH catalyst concentration (4%, 6%, 8%) in hydrolisis process and delignification time (1 hour, 11/2 hour, and 2 hour) . The best hydrolisis result is 8%, the best delinification time is 1 jam with concentration 8% NaOH in the process of ripening and the highest purity of lignine is 3,14%. The result of delignification will be analized its lignine concentration usingfor Fourier Transform Infra Red (FTIR) to know its function cluster.Keywords: Delignification, Extraction, FTIR, Hydrolisis, Rice Straw, Lignine, Klason Method
Sintesis Hidroksiapatit Dari Precipitated Calcium Carbonate (PCC) Terumbu Karang Melalui Proses Presipitasi Dengan Variasi Rasio Ca/P Dan pH Reaksi Getra Anugrah; Yelmida Azis; Komalasari Komalasari
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

Hydroxyapatite is a crystalline molecule composed of phosphorus and calcium with the molecular formula Ca10(PO4)6(OH)2. Synthetic hydroxyapatite is known as one of the important implant materials because it has bioactive, biocompatible and osteoconductive properties that chemically resemble bone and tooth mineral components, so it can be used as a substitute for human hard tissue. In this study hydroxyapatite was synthesized from PCC coral reefs using precipitation method with variations in pH (9; 10 and 11) and the mole ratio of Ca/P (1.57; 1.67 and 1.77). The obtained hydroxyapatite was analyzed by using XRD and SEM-EDX analysis. The obtained hydroxyapatite obtained was analyzed by XRD analysis with the best crystallinity closest to the standard hydroxyapatite and the smallest crystal sized was 10.76507 nm at pH 9 with Ca/P ratio of 1.67. Based on the SEM-EDX analysis, the best results was produce at pH 9 and the mole ratio of Ca/P 1.67 with agglomerate shaped particles, 2.549% particle distribution and final Ca/P mole ratio 1.61.Key word: Ca/P ratio, hydroxyapatite, pH, precipitation
Sintesis Biosurfaktan Dari Metil Ester Lemak Ayam : Pengaruh Rasio Mol Metil Ester Lemak Ayam Dengan Trietanolamin Dan Jumlah Katalis KOH Rahmat Setiawan; Irdoni Irdoni; Yelmida Yelmida
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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The surfactant is a substance which has the ability to reduce surface tension, interface tension, and increase the stability of an emulsion. The Surfactant is an intermediate product which is widely applied in the fields of health, pharmacy, industry, and cleaning products in the household. This study makes biosurfactant from chicken fat. The purpose of this study is to make biosurfactants from chicken fat, to see the effect of mole ratio chicken fat methyl ester with trietanolamine and amount catalyst of KOH on the biosurfactant characterization produced. The preliminary treatment in this study includes preparation of raw materials, extraction of chicken fat by oven method, the degumming process using phosphoric acid at temperature 90°C for 1 hour, gum separation by centrifuge. The transesterification process of methyl ester formation with a mole ratio of oil: methanol 1 : 9, KOH catalyst as much as 2%(b/b) of oil, at temperature 65°C for 6 hours. In the final stage, the transesterification process of chicken fat methyl ester and trietanolamine with operating condition of time is 4 hours and temperature 150°C and agitation speed 200 rpm. The transesterification process with mole ratio variation TEA : chicken fat methyl ester 1 : 2, 1 : 3, 1 : 4 and amount of catalyst variation 3%, 5% and 7%. The best characteristics of biosurfactant were produced at mole ratio 1 : 2, KOH catalyst 3% with the density of 0,922 gr/ml, the pH 9,8, the surface tension of 33,54%, the interface tension of 29,29%, the emulsion stability of 98%, the yield 76,45%, and FT-IR test to ascertain amine functional groups in biosurfactant.Keyword : Biosurfactant, chicken fat, transesterification, triethanolamine
Konversi Pati Sorgum Menjadi Bioetanol Menggunakan Variasi Konsentrasi Enzim Stargen tm 002 Dan Yeast Saccharomyces Cerevisiae Dengan Proses Sakarifikasi Dan Fermentasi Serentak Ilham Ilham; Chairul Chairul; Yelmida Azis
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
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Sorghum is a resource of grain yield with 55-75% starch composition similar to corn, that was potential as raw material for production of bio ethanol. Research based sorghum bio ethanol manufacture carried out using enzymes stargenTM 002 and starch raw materials. The purpose of this study was to determine the concentration of substrate and the best time of fermentation to produce bio ethanol. The research method consists of hydrolysis and saccharification processes are aided by enzymes stargenTM 002 followed by a fermentation process using yeast Saccaromyces Cerevisiae, ferment at room temperature, pH 4.5, enzymes stargenTM 002 concentration 2,5% and evaporated at a temperature 1000C. Using enzyme concentration were 4%, 5%, 6% and 7%, particle size used was 60-80 mesh and time of fermentation 30, 36, 42, 48, 54, 60, 66 and 72 hours. At 6% concentration of enzyme and the optimum time is 60 hours can produce the highest bio ethanol concentration of 12.413% (v/v).Keyword: Bioethanol, Enzym StargenTM 002, Fermentation, Sorghum, Substract Concentrations.
Pengaruh pH Terhadap Bentuk Partikel Hidroksiapatit Dari Precipitated Calcium Carbonate (PCC) Kulit Telur Itik Melalui Metode Presipitasi M. Gherald Erlangga Putra; Yelmida A; Evelyn Evelyn
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Abstract

Hydroxyapatite (Ca10(PO4)6(OH)2) is the most stable form of calcium phosphate, which is widely used in various medical applications, mainly in orthopedics and dentistry due to it’s similarities with inorganic mineral component of bone and teeth. However, in spite of chemical similarities, mechanical performance of synthetic hydroxyapatite was very poor compared with that of natural bone. It is possible to improve the properties of hydroxyapatite ceramics by controlling important parameters of powder precursors such as particle size, particle shape and agglomeration. In this study, synthesized of hydroxyapatite used PCC and (NH4)2PO4 as raw material. The PCC was made from duck’s eggshells with carbonation method. The hydroxyapatite later would be sintered in 500 ̊C and then characterized by SEM and XRD. The synthesis of hydroxyapatite in this study had been done succesfully with the aid of precipitation method, by controlling the pH. Needle-like hydroxyapatite was synthesized at pH 8 and pH 10 and spherical-like hydroxyapatite was synthesized at pH 12. XRD analysis showed the similarities with standard hydroxyapatite ICDD 01-074-0566. It has been found that the degree of crystallinity had been raised as the pH increased. Keywords: agglomeration, duck eggshells, hydroxyapatite, precipitation
Studi Pendahuluan Penggunaan Katalis Logam-HAp Pada Pembuatan Biodiesel Syafruddin Syafruddin; Yelmida Azis; Zultiniar Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
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The safety and sustainability of an energy source, along with biodegradability is a parameter whether an alternative energy considered successful or not. Currently, biodiesel is an environmentally friendly and has low manufacturing cost. Biodiesel cathegorized as fatty acid methyl esther (FAME) which is generated from fat or oil. In this research, palm fatty acid destillate (PFAD) is used as raw material to produce biodiesel. PFAD is converted into FAME through single stage estherification. This estherification reaction combine 25 gram of PFAD with 97 gram of methanol with mixing rate of 350 rpm at 60˚C for 1, 2, and 3 hours. 0,25 gram of metal-hydroxyapatite catalyst (Cu-HAp, Co-HAp, Ni-HAp, dan HAp) will assist in the process of converting PFAD into FAME. The focus of this study is the effect of time and type of metal-HAp on the conversion of PFAD into FAME. The highest yield of biodiesel is acquired at the usage of (3%) Cu-HAp catalyst for 3 hours. Physical test result has fulfilled SNI 04-7182-2006 which includes 0.84 g/ml density, 4.8 cSt viscosity, 120 ˚C flash point, 61.48% yield, acid number of 0.73 mg KOH/gr oil. Based on the GC-MS (Gas Chromatography-Mass Spectrometer) analysis, the main component of the PFAD-based biodiesel is 53.1% hexadecanoic methyl esther, 32.81% 9-octadecanoic methyl esther and 5,93% 9,12-octadecadinoic methyl esther.Keywords: Biodiesel, Estherification-transestherification, Methanol, Metal-HAp catalysts, PFAD
Co-Authors ', Padil Abd. Rasyid Syamsuri Adam Rafif Aldori Ade Putra Adrian, Melisa Agustiyanti, Rini Dwi Agustiyanti, Rini Dwi Ahmad Fadli Ahmad Fadli Ahmad Fadli Aidil Akbar Aisyah Dewi Ranti, Aisyah Dewi Akbar, Anif Aulia Al'farisi, Cory Dian Alel, Ariya Eka Alfarisi, Cory Alfarisi, Cory Dian Alfarizi, Cory Dian Alltop Amri Ya Habib Alpina, Clara Shinta Asri Al’farisi, Cory Dian Amun Amri Aras Mulyadi Ari Wibowo Harahap Audrya, Helsa Az Zahra, Alya Azriyenni Azhari Zakri Bahruddin Bahruddin Bahruddin Bintoro Bintoro Blesvid, Bloomy Caesari Caesari Cece R Chairul Chairul Chairul Chairul Chandra Marzuki Nababan Citra Arimby Dani Pradana Dedeng Hermoyo Delita, Fuji Dewi, Yuli Piana Dhini Octavianty Dian Novita Rahmawaty Dini Aulia Sari Ermal Drastinawati Drastinawati Drastinawati Drastinawati, Drastinawati Edy Saputra Elvi Yenie, Elvi EVELYN EVELYN Evelyn Evelyn Fadli, Deno Febri Fadly Sitohang Fajril Akbar Fajril Akbar Faradila, Harfiah Ferdy Ashari Syawal Getra Anugrah Hadi Ikrima Hadrian Yonas Sebastian Napitupulu Hastuti, Ririn Puji Hazzamy, Muhammad Asyaf Helda Sri Rahayu, Helda Sri Hidayat, Muhammad Ariful Holyness Nurdin Singadimedja Hotni Lamtiar Hutagaol, Nurhidayah I Gusti Bagus Wiksuana Ida Zahrina Idral Amri Ikhma Zurani Imron Sutiono Indah Sri Rahma Ningsih Indra Purnama Irdoni Irdoni Jefry Soclin Sianipar Jenial S Kamarullah, Rahmat Kayabi, Ulhunk Aulia Kendro Prasetyo Khairat, Khairat Komalasari Komalasari Komalasari Komalasari Komalasari Komalasari Komalasari Luckita, Gema Kesa Lucy Rahmawati M Asyraf Hazzamy M. Gherald Erlangga Putra M. Rafi Yunanda M. Yogi Riyantama Isjoni Mahdi, Zamratul Miftah Anugrah Mohd. Rafiq Muhammad Alfin Khairullah Muhammad Ichwan Pradana Muhammad Khairil Amri Muhammad Rahman Muhammad Syafiq Izzuddin Muhammad Yahya Muhammad Yusro Annur Mukhlis Khoirudin, Mukhlis Musbar, Al Swendo Mutamima, Anisa Nurfajriani Nurfajriani Nurfatihayati Nuruzzaman Shiqhi Padil Padil Paul Destin Purba Putri M F Putri, Desi Erika Qalbi, Tiffani R, Yolanda. Rafif Sauqi Rahimah Rahimah Rianto Harpendi Rio Saputra Ristandi, Ristandi Romadona, Syahri Rozanna Sri Irianty Rozanna Sri Irianty Rozanna Sri Irianty Ryan Tito Sanredina Sanredina Saputra, Rio Saragih E Sari D. P Shinta Elystia Siahaan, Daniel Andica Silvia Reni Yenti Sisi Oktadira Kalpatari Siti Rahmalia Sri Hidayanti Sri Murda Niati Sri Rezeki Muria Suhendri Suhendri Suhendri SUNARNO Sunarno Sunarno Syafruddin Syafruddin SYAIFUL BAHRI Syamsu Herman Syelvia Putri Utami Tanjung, Muhamad Adrian Tengku Emrinaldi Toni Arissaputra Utama, Panca Setia Utami Utami Vina Ermalinda Wahyu Lestari Wahyu, Pri Widya Pangestu Wisrayetti Wisrayetti Wisrayetti, Wisrayetti Yeni Kusumawaty Yoanni Marsha Rezki Yoga Deswan Suwary Yolanda, Yogi Yuliatmi Yuliatmi Yunus Olivia Novanto Yunus, Aulia Yusnimar Sahan Zahrina, Zahrina Zakwan Zarkasi, Shoumi Zikri, Ahmed Zuchra Helwani Zuchra Helwani, Zuchra Zultiniar ' Zultiniar Zultiniar Zultiniar, Zultiniar Zultiniar, Zultiniar