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All Journal Jurnal Kebidanan Jurnal Penelitian dan Evaluasi Pendidikan Reaktor Jurnal Sains dan Teknologi Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains AVERROUS: Jurnal Kedokteran dan Kesehatan Malikussaleh Unri Conference Series: Community Engagement Jurnal Kesehatan Amanah Al-'Adad: Jurnal Tadris Matematika Karakter: Jurnal Riset Ilmu Pendidikan Islam
Komalasari Komalasari
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Ekstrak Daun Salam (Syzgium Polyantha L) Dengan Metode Soxhlet Sebagai Inhibitor Korosi Pada Baja Karbon ASTM A36 Dalam Media Korosi NAOH Dan HCL Oding Sitorus; Komalasari Komalasari; Sri Rezeki Muria
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Corrosion is defined as the result of damage from a chemical reaction between a metal and its environment. The use of inhibitors is one way to inhibit the corrosion rate. Bay leaf extract is an organic material that can be used as an inhibitor. The purpose of this study was to determine the effect of adding bay leaf extract on the corrosion rate of ASTM A36 carbon steel in 0.5 M HCL and 1 M NaOH corrosive media. The extraction method used was socletation with a ratio of ethanol : distilled water 1: 3 and immersion time of 24 hours, 36 hours, 48 hours and 60 hours. The effectiveness of using bay leaf inhibitors (0 and 2.5 gr/L) is known through the weight loss test. FTIR test results show that the bay leaf extract contains tannin compounds which can inhibit the corrosion rate that occurs in ASTM A36 carbon steel when used as a corrosion inhibitor. The best efficiency occurred at a concentration of 2.5 g / L with a soaking time for 60 hours in a 0.5 M HCL solution of 82%. Keywords: bay leaf extract, carbon steel, corrosion rate, inhibitor efficiency
Pembuatan Green Inhibitor Dari Ekstrak Kopi Dengan Menggunakan Metode Sokletasi Pada Baja Karbon Abdul Rahman Marwis Karim; Komalasari Komalasari
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Corrosion is a degradation of metals quality caused by chemical reaction between metal and its ambient. The used of green inhibitor is a natural methods to control the corrosion rate of metal. The objective of this research is to count the efficiency of green inhibitor from coffee extract, to find which variable that affect the most of corrosion rate of mild steel, to determine the best concentration of extracts to control the corrosion rate of mild steel. The extraction methods is Soxhletation with solvent rasio 1 : 4 of ethanol : aquadest. Weight loss method is used to determine the rate of corrosion with 0,5;1;1,5 g/l variance of inhibitor concentrations and 3, 6, 9, 12 days contact times. The lowest corrosion rate is 150,22 mpy at 1,5 g/l of coffee extract inhibitor solution with 9 days contact times and the highest efficiency is 51,44% at 1,5 g/l of coffee extract inhibitor solution with 12 days of contact times.Keywords: coffee extract, green inhibitor, soxhletation,
Kinetika Reaksi Sintesis Magnetite Menggunakan Metode Kopresipitasi Dengan Pendekatan Model Avrami Adela Shofia Addabsi; Ahmad Fadli; 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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Magnetite is a material that can be used in a drug delivery aplication. The purpose of this study is to determine the effect of temperature and stirring rate on the magnetite crystal size and determine the kinetic equation of magnetite synthesis with Avrami model approach. The magnetite was synthesized using coprecipitation method by reacting FeCl3 and FeCl2 in 2:1 mole ratio and NH4OH 10% at temperature range of 40°C, 60°C, 80°C, and a stirring rate were 300, 400, 500 rpm in a beaker. Samples were taken about 20 mL in every 5 minutes for 30 minutes. Then the sample was filtered to separate solids and filtrate. Analysis of Fe concentrations in the filtrate was using AAS, while the precipitate was washed until neutral and dried at 100°C for 2 hours. Then the magnetite powder was characterized by XRD and SEM-EDX. From the characterization we found a cubic structure of magnetite and crystals size of magnetite is about 10-12 nm formed. The morphology of the magnetite particles tended to be aglomerated but if the temperature and stirring rate increased, the aglomeration of the particles would be uniform. This synthesis of the magnetite could be approximated by the Avrami model with the core of forming function value (n) is ranging from 1.3-1.6. If the temperature and the stirring rate increased, the value of the rate constant of transformation (k) increased too. At temperature 30 °C; 300 rpm obtained the constant rate of transformation of 0.01 min-1 and 0.08 min-1 at temperature 80 °C; 500 rpm.Keywords: aglomeration, avrami, coprecipitation, drug delivery, magnetite
RUPTUR UTERI SEBAGAI KOMPLIKASI TOLAC PADA PASIEN DENGAN KETUBAN PECAH DINI Rajuddin Rajuddin; Komalasari Komalasari; Roziana Roziana
AVERROUS: Jurnal Kedokteran dan Kesehatan Malikussaleh Averrous, Vol. 4: No. 2 (November, 2018)
Publisher : Fakultas Kedokteran Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/averrous.v4i2.1042

Abstract

Ruptur uteri inkomplit secara klinis signifikan terjadi setelah persalinan caesar sebelumnya dan merujuk pada gangguan lengkap dari semua lapisan uterus, kecuali serosa. Meskipun kejadiaanya sangat jarang, kurang dari 1% dari seluruh uji coba persalinan setelah kelahiran sesar (TOLAC). Komplikasi ini dapat memberikan outcome buruk termasuk komplikasi yang berhubungan dengan perdarahan berat, laserasi kandung kemih, histerektomi, dan morbiditas neonatal yang terkait dengan hipoksia intrauterin. Ruptur uteri inkomplit merupakan salah satu komplikasi TOLAC yang harus segera dikenali agar mendapatkan outcome maternal dan fetal yang lebih baik. Kami melaporkan satu kasus ruptur uteri inkomplit sebagai komplikasi TOLAC pada wanita multipara (G2P1A0) berusia 33 tahun hamil 39-40 minggu dengan ketuban pecah dini. Pasien menolak untuk terminasi kehamilan melalui tindakan seksio sesaria dan diputuskan untuk menjalani TOLAC dengan skor VBAC (Vaginal birth after cesarean delivery) adalah 2 (60%) dan skor Weinstein 4 (58%). Ketika observasi kemajuan persalinan pasien mengalami nyeri perut hebat, kontraksi hipertonik tanpa kelainan denyut jantung janin dan tanpa ring bundlesign. Pasien kemudian menjalani terminasi kehamilan perabdominal. Temuan intraoperatif menunjukkan suatu hematoma di bawah lapisan serosa sebagai akibat dari ruptur uterus inkomplit hingga ke lateral kiri. Setelah menjalani tindakan SC(Sectio Caesarea), ibu dan bayi dalam kondisi yang baik. Ruptur uteri inkomplit terjadi pada sekitar kurang dari 1% dari pasien yang menjalani TOLAC. Ketuban pecah dini yang terkait dengan abruptio plasenta dapat menjadi risiko terjadinya komplikasi ruptur uteri pada TOLAC. Namun, hal ini masih membutuhkan penelitian lanjutan. Sebagian besar ruptur uteri inkomplit asimptomatis atau menunjukkan gejala yang tidak khas. Pengenalan awal kondisi ini dapat menghasilkan outcome maternal dan fetal yang lebih baik.
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.
EFEKTIFITAS APLIKASI GEOGEBRA PADA PEMBELAJARAN GEOMETRI Muhammad Rivaldiansyah; Asyraful Akbar; Komalasari Komalasari
Bahasa Indonesia Vol 2 No 1 (2023)
Publisher : IAIN Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (964.375 KB) | DOI: 10.24260/add.v2i1.1565

Abstract

Tujuan penelitian yang dilakukan untuk mengatasi kesulitan siswa dalam belajar kesebangunan dan kekongruenan. Penelitian ini menggunakan pendekatan kualitatif dengan metode deskriftif dan teknik yang digunakan ialah teknik wawancara. Penelitian ini terdapat peneliti dan tiga peserta didik dari sekolah yang berbeda. GeoGebra merupakan aplikasi geometri yang bisa digunakan tanpa melalui akses internet sehingga mudah digunakan dimana saja serta aplikasi ini menawarkan berbagai fitur yang menarik dan simpel.Hasil penelitian ini menunjukkan keefektifan penerapan aplikasi GeoGebra dibandingkan dengan pembelajaran tanpa aplikasi GeoGebra terlebih pada era digital. Dalam GeoGebra terdapat berbagai tampilan yang sudah disediakan dalam membantu proses pembelajaran matematika seperti tampilan aljabar dan grafik, tampilan geometri, tampilan pengolah angka, tampilan Computer Algebra System, tampilan grafik 3 dimensi dan tampilan probabilitas statistik.
Pengaruh Penambahan Akuades Terhadap Lapisan Hidroksiapatit Pada Permukaan Logam Ines Indriyani; Komalasari Komalasari; Ahmad Fadli
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

316L stainless steel is a material that can be used as an implant because it has strong mechanical properties but does not have bioactive properties so it needs to be coated with hydroxyapatiteon the surface of 316L stainless steel. The aim of the study was to determine the effect of weight ratio of hydroxyapatite and distilled water to the thickness of the hydroxyapatite layer. The method used in the study starts from the preparation of the dipping solution then the substrate was installed in the dip coating unit and the dipping processbegins. The fixed variables used in this research are the amount of HAp weight that is 12 grams, the stirring time is 20 hours, and the sintering time is 1 hour. While the changeable variables used in this study are the amount of aquades by 24 and 28 grams. Parameters has a significant effect on layer coating thickness which gives 29,6% change in the thickness of the HAp layer. The more addition of distilled water to the coating solution, the thickness of the HAp layer decreases and vice versa.Keywords : dip coating, hydroxyapatite, implan, steel
Ekstrak Daun Bambu Tali (Gigantochloa Apus) Sebagai Green Inhibitor Terhadap Laju Korosi Baja Karbon Dalam Media HCL Abdullah Agung Hayyuka; Komalasari Komalasari; Rozanna Sri Irianty
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

Corrosion is a decrease in the quality of a metal due to an electrochemical reaction between the metal and its environment. The use of inhibitors is the right way to protect the internal partsof metal pipes from corrosion. Gigantochloa apus leaves extract can be used as a natural inhibitor. This research aims to characterize the results of Gigantochloa apus leaves extract, determine the rate of corrosion in carbon steel with the addition of inhibitors from Gigantochloa apus leaves extract, and determine the variables that affect the corrosion rate.The extraction method used is soxhletation with an ethanol:distilled water ratio of 1:4. The variables used in the form of 0.5M, 1.0M, 1.5M HCl media variations and immersion time for 24, 32, 40 hours with inhibitors concentration of 2 g/L and weight loss method in carbon steel. The results showed that Gigantochloa apus leaves extract contained tannin compounds (phenolic OH groups), namely in waves 3234.76 and 3350.50 cm-1 as much 17.54 mg/g. The best corrosion rate inhibitors on carbon steel are 17.65 mpy at corrosive media HCl 1M and immersion time 20.69 hours. Corrosion rate test on carbon steel showed that the influential variable was immersion time, concentration of corrosive media and inhibitors concentration.Keywords: central composite design, corrosion rate, gigantochloa apus leaves, inhibitors
Sintesis Hidroksiapatit Dari Precipitated Calcium Carbonate (PCC) Terumbu Karang Melalui Proses Presipitas Dengan Variasi PH Dan Suhu Sintering Muhammad Alfin Khairullah; Yelmida Yelmida; Komalasari Komalasari
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

Hydroxyapatite is a bioceramic acid which is widely used as a bone and tooth graft, catalyst and adsorbent. Hydroxyapatite is a calcium phosphate compound that can be synthesized from natural ingredients with calcium content such as coral reefs. Coral reefs are marine biota with a CaCO3 content of 98.8%. This study aims to synthesize hydroxyapatite through the formation of Precipitated Calcium Carbonate (PCC) from coral reefs. The research procedure begins with the calcination process of coral reefs to form CaO which is then made into PCC using the carbonation method. PCC as a source of calcium is synthesized into hydroxyapatite using the precipitation process with variations in pH (9 and 11) and sintering temperature (without sintering, 400oC, 500oC, 600oC). The synthesized hydroxyapatite was analyzed by X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). The results of the XRD analysis showed the formation of hydroxyapatite compounds from the angle 2θ which corresponds to the data (ICDD 01-072-1243). Hydroxyapatite synthesized at pH 11 and sintering temperature of 600oC gave the best results with hexagonal crystal structure, the value of the degree of crystallinity was 89,632 and the crystal size was 18,0623. Keywords: degree of crystallinity, PCC, pH, sintering temperature
Pengaruh Penambahan Pati Jagung Pada Pembuatan Prototipe Tulang Menggunakan Metode Starch Consolidation Agung Prabowo; Ahmad Fadli; Komalasari Komalasari
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

Hydroxyapatite (HA) is a crystalline molecule composed of phosphorus and calcium. One technique for fabricated porous HA is the starch consolidation method. The objective of this study was to determine the effect of starch addition on porous HA. The study was conducted by mixed HA as much as 20 grams with the amount of starch 8, 10, 12 and 14 grams of corn starch, and 25 ml of distilled water to form a slurry. The slurry formed is then stirred at 400 rpm. The mixture is then poured into a mould. Then the mixture in the mould was heated to 100oC for 60 minutes. After that, the green bodies are removed from the mould and dried in an oven at 80°C for 24 hours and 110°C for 8 hours. The dried sample is then put into the furnace. Combustion is carried out at a temperature of 600˚C and ended with sintering at a temperature of 1250˚C each for 1 hour. Increasing the addition of starch causes the greater of the shrinkage and porosity, and the density and bending strength is getting smaller. Sintered bodies show shrinkage in the range of 35.47–47.46%, porosity 22.0-37.75%, density 1.97-2.46 gr / cm3, bending strength 0.33-2.33 MPa and pores size obtained is in the range of 80-150 μm.Keywords: bone replica; hydroxypatite; porosity; starch
Co-Authors A. Fadli Abdul Hafiz Hidayat Abdul Rahman Marwis Karim Abdullah Agung Hayyuka Adela Shofia Addabsi Adha Widoni Agung Prabowo Ahmad Fadli Al Qarni Putra Amun Amri Astri Gusrita Asyraful Akbar Ayu Annisya Tri Adriana Boy Jansen Roberto Manik d R. Sari Dani Pradana Desi Heltina Dhamala Shobita Chandra Dimas Nofriyan Drastinawati Drastinawati Edy Saputra Eferius Mendrofa Evelyn Evelyn Fachry Abda El Rahman Fadhila Ulfa Farhan Hidayatullah Farida Farida Fauzia Mulyana Fikri Miftahul Shiddiq Firman Tampubolon fitriyanti fitriyanti Getra Anugrah Hadrian Yonas Sebastian Napitupulu Harfiah Faradila Ian Desi Rosalina Situmeang Ida Zahrina Ilham Habib Ines Indriyani Jimmy Anderson Kartono , Kendro Prasetyo M. S. Amir Mardianti Mardianti Mastiar Krisdayanti Sinaga Muhammad Alfin Khairullah Muhammad Khairil Amri Muhammad Rivaldiansyah Mustika Canra Oding Sitorus Paian Harianja Primadevi, Inggit Putri Rahmadani Qurotullaili Qurotullaili Rahmat Ilham Rajuddin Rajuddin rima siburian Rina Maryenti Riona Sanjaya Roin Nuretha Rozanna Sri Irianty Roziana Roziana Saefudin Zuhri Siska Siska Siti Chotijah Sri Rezeki Muria Sry Utami Pardede Syelvia Putri Utami Teuku Azhari Hassan Tubagus Maruf Ansori Vina Sutratul Putri Viona Aulia Rahmi Wahyu Hidayat Yelmida Azis Zuchra Helwani Zultiniar Zultiniar