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All Journal Jurnal Ilmu Dasar Jurnal Sains Materi Indonesia JFA (Jurnal Fisika dan Aplikasinya) JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Science and Technology Indonesia International Journal of Science and Applied Science: Conference Series Indonesian Journal of Chemistry SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Jurnal Kreativitas PKM JIEMS (Journal of Industrial Engineering and Management Systems) Jurnal Fisika : Fisika Sains dan Aplikasinya Jurnal Teori dan Aplikasi Fisika JASIEK (Jurnal Aplikasi Sains, Informasi, Elektronika dan Komputer) Jurnal Fisika Indonesia Jurnal Pengabdian Masyarakat Khatulistiwa Journal of Energy, Material, and Instrumentation Technology NEAR: Jurnal Pengabdian kepada Masyarakat Jurnal Kemitraan Masyarakat
Posman Manurung
Departement Of Physics, Faculty Of Mathematic And Natural Science, University Of Lampung
Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry 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 Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Other

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Synthesis and Characterization of Titania-Rice Husk Silica Composites as Photocatalyst Posman Manurung; Rudy Situmeang; Ediman Ginting; Indra Pardede
Indonesian Journal of Chemistry Vol 15, No 1 (2015)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (482.219 KB) | DOI: 10.22146/ijc.21221

Abstract

This article describes the synthesis of titania-silica composites by a sol-gel method using a mixture of silica of rice husk and titanium butoxide sols. Microstructures were examined at calcination temperature in the range of 500 to 700 °C, with temperatures interval of 50 °C. The sintered catalysts were subsequently tested for photodegradation of methylene blue (MB) under ultraviolet and sunlight rays. Physical characteristics were analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM)/energy dispersive X-ray spectroscopy (EDS), and Brunauer-Emmett-Teller (BET). The XRD results did not show the presence of silica crystal phase in each sample. The results showed that the highest BET surface area of samples was obtained at the temperature of 650 °C. In sample calcined 500 °C, the activity of the catalyst on MB was relatively similar in both sunlight and ultraviolet rays.
Efek NaOH pada Pembentukan Nano ZnO Metode Hidrotermal Rahma Fauza; Posman Manurung; Yanti Yulianti
Journal of Energy, Material, and Instrumentation Technology Vol 2 No 3 (2021): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v2i3.146

Abstract

Hydrothermal methods have been developed for the manufacture of ZnO. This study aims to find out the effects of variation on the chemical composition and structure of nanoZnO, the nanoZnO phase formed and the nanoZnO particle size formed. The NaOH variation used is 1; 2; 3; and 4 grams. The characteristics used are X-Ray Diffactions (XRD) and Scanning Electron Microscopy (SEM). The XRD characterization results show that the diffraction peaks correspond to standard databases and show wurtzite phases with hexagon structures. The results of SEM characterization showed that the mean measurement of ZnO particles and the error value in the 1 gram variation was 67 ± 3 nm, while the 3 gram variation was 76 ± 6 nm.
Sintesis Nanotitania dengan Cara Hidrotermal sebagai Fungsi Suhu Sumiyati Sumiyati; Posman Manurung; Suprihatin Suprihatin
Journal of Energy, Material, and Instrumentation Technology Vol 2 No 4 (2021): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v2i4.152

Abstract

Research has been carried out on the synthesis of nanotitania by hydrothermal as a function of temperature. The purpose of this study was to determine the effect of temperature on the phase formation, structure and particle size of TiO2 using the hydrothermal method with TiOSO4 as the main ingredient. In this study, using temperature variations of 150, 200, 250 and 300°C and samples were characterized using X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). The phases formed are the anatase and rutile phases which have a tetragonal structure and the hilly phase with an orthorhombic structure. The rutile phase appeared predominantly in each sample and the sulfuric phase only appeared at 250ºC. The anatase phase obtains a particle size of 10-18 nm, where the higher the temperature, the bigger the particle size. Furthermore, the rutile phase obtained a particle size of 14-25 nm, where the higher the temperature, the smaller the particle size.
Pengaruh Variasi Pelarut antara Amoniak dan Aquades terhadap Karakterisasi Difraksi Sinar-X Bahan SnO2 Posman Manurung
JIEMS (Journal of Industrial Engineering and Management Systems) Vol 2, No 2 (2009): Journal of Industrial Engineering and Management Systems (JIEMS)
Publisher : Universitas Bunda Mulia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30813/jiems.v2i2.68

Abstract

Synthesis has been done and characterization of X-ray diffraction (XRD) SnO2 materials produced by the precipitation process from starting materials with SnCl2 variation between ammonia and solvent aquades each one to one up to six. C for 4 hours Sintering temperature of the sample conducted at 1050. The results of qualitative analysis of the sample shows clearly the presence of SnO2 phase with tetragonal crystal structure and space group P42/MNM. The results of refining the XRD data using SnO2 sample Rietveld method between 1.52 to 4.08 2 produces the best matching score ( In general, all cell parameters length is the same sample. In comparison the variation of solvent 1:4, 1:5 and 1:6 high changes in the hkl diffraction peak (110) and (011) as a result of changes in grain size sample.Keywords: Tin Dioxide (SnO2), Presipitation, Rietveld Analysis
Perhitungan Burn Up pada Reaktor HCLWR Model Geometri Kotak Tiga Dimensi dengan Bahan Bakar Thorium Menggunakan Kode COREBN Hasni Handayani; Yanti Yulianti; Posman Manurung
Jurnal Fisika Indonesia Vol 24, No 2 (2020)
Publisher : Department of Physics Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfi.v24i2.57167

Abstract

Penelitian tentang perhitungan burn up pada reaktor HCLWR model geometri kotak tiga dimensi dengan bahan bakar thorium menggunakan kode Corebn telah dilakukan. Perhitungan dilakukan dengan simulasi komputasi menggunakan kode COREBN pada program System Reactor Atomic Code (SRAC). Parameter yang dianalisis pada penelitian ini meliputi pengayaan bahan bakar, periode, total power, dan konfigurasi. Hasil perhitungan memperoleh semakin besar persentase pengayaan pada U233, maka nilai keff akan semakin meningkat. Persentase yang optimal pada pengayaan bahan bakar U1 1% dan U3 4%. Semakin lama periode burnup (385 – 405 hari) dan besar total power (244-247 MWt), maka nilai keff  akan menurun dan nilai CR meningkat. Perubahan konfigrasi memperoleh rapat daya maksimum 336,0367 Watt/cm3dan nilai rapat daya yang konstan pada kolom x baris y, dan z. Desain reaktor yang dapat menghasilkan nilai rasio konversi 1 dengan keff dapat membuat reaktor menyala hingga akhir yaitu ketika pengayaan bahan bakar U1 1% dan U3 3%, periode 150 hari dan fraksi volume 45,0% bahan bakar, 11,3% selongsong, 43,7% moderator.
Pelatihan Pengelolaan Dan Pengembangan Laboratorium Fisika SMA Kabupaten Lampung Tengah Amir Supriyanto; Sri Wahyu Suciyati; Roniyus Marjunus; Posman Manurung
NEAR: Jurnal Pengabdian kepada Masyarakat Vol. 1 No. 2 (2022): NEAR
Publisher : Komunitas Dosen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32877/nr.v1i2.443

Abstract

Kompetensi pengelolaan laboratorium yang dimiliki tenaga laboratorium Fisika SMA di Kabupaten Lampung Tengah masih rendah dan laboratorium Fisika belum diberdayakan secara optimal. Kemampuan dan kesempatan untuk mengikuti pelatihan pengelolalaan laboratorium dan pengambangan bagi pengelola laboratorium Fisika SMA masih minim. Tujuan kegiatan adalah untuk meningkatkan kemampuan pengelolaan dan penngembangan guru fisika sebagai pengelola laboratorium Fisika SMA di Kabupaten Lampung Tengah, sehingga dapat meningkatkan kualitas hasil pembelajaran berparktikum. Metode pelaksanaan kegiatan meliputi: tes awal, pemaparan materi (ceramah dan diskusi), dan tes akhir. Pelaksanaan kegiatan dilakukan selama dua hari, yaitu tanggal 12—13 Agustus 2020, bertempat di SMAN 1 Terbanggi Besar Kabupaten Lampung Tengah. Kegiatan diikuti oleh oleh 35 orang guru, yang berasal dari 18 kecamatan di Kabupaten Lampung Tengah. Hasil tes awal menunjukkan bahwa nilai tes awal terendah 10, tertinggi 60, dan rata-rata 42,29. Sedangkan hasil tes akhir diperoleh nilai terendah 50, tertinggi 100, dan rata-rata 77,43. Hasil tes menunjukkan peningkatan pemahaman peserta yang ditunjukkan dengan peningkatan nilai tes awal dan tes akhir dengan nilai terendah meningkat 40%, nilai tertinggi meningkat 67 %, dan rata-rata meningkat 97 %.
Variasi Kadar CaCO3 Terhadap Pertumbuhan Fasa Suoperkonduktor BPSCCO-2223 Menggunakan Metode Pencampuran Basah Ketut Putra Wijaya; Suprihatin Suprihatin; Posman Manurung
JASIEK (Jurnal Aplikasi Sains, Informasi, Elektronika dan Komputer) Vol 2, No 1 (2020): Juni 2020
Publisher : Universitas Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jasiek.v2i1.3632

Abstract

Telah dilakukan penelitian tentang pengaruh kadar CaCO3 terhadap pertumbuhan fasa BPSCCO-2223 menggunakan metode pencampuran basah dengan memvariasikan kadar Ca. Sintesis dilakukan dengan melarutkan sampel menggunakan HNO3 dan aquades secara perlahan kemudian dilakukan pengeringan pada suhu 300, 400, dan 600 ℃ secara bertahap. Sampel dikalsinasi selama 10 jam  pada suhu  800 ℃ dan disintering pada suhu 865℃ selama 10 jam. Hasil sintesis superkonduktor dikarakterisasi menggunakan XRD, SEM  dan uji Meissner. Hasil XRD menunjukkan  bahwa penambahan kadar Ca berpengaruh terhadap tingkat kemurnian fasa superkonduktor BPSCCO-2223. Pada penelitian ini, kadar Ca yang optimum yaitu Ca 2,05 mol dengan  nilai fraksi volume (Fv) sebesar 79,98%. Sedangkan fraksi volume terendah adalah Ca 1,95 mol sebesar 41,27%. Derajat orientasi yang relatif tinggi terdapat pada sampel Ca 2,10 mol sebesar 7,67% dan terendah terdapat pada Ca 1,95 mol sebesar 0%. Hasil SEM menunjukkan bahwa semua sampel telah memiliki lapisan-lapisan yang tersusun (terorientasi) dengan ruang kosong antara lempengan (void) relatif kecil. Hasil uji-Meissner menunjukkan bahwa Ca 2,05 mol mengalami efek Meissner lemah, sedangkan sampel BPSCCO-2223 yang lain tidak menunjukkan adanya efek Meissner dalam nitrogen cair    (77 K).Kata Kunci : BPSCCO-2223, Derajat Orientasi, Fraksi Volume, Superkonduktor, Uji-Meissner
Soliton Dynamics Analysis of Peyrard-Bishop-Dauxois DNA Model Using 4th Order Morse Potential Approach Alfin Edo Kaisar Lubis; Yanti Yulianti; Agus Riyanto; Posman Manurung
Journal of Energy, Material, and Instrumentation Technology Vol 3 No 4 (2022): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v3i4.62

Abstract

Research has been carried out to analyze the dynamics of the soliton DNA of the Peyrard-Bishop-Dauxois (PBD) model with 4th-order-approximation Morse Potential. The aim of research is to know physical changes of PBD model with  4th-order-approximation Morse Potential on stable and unstable state in describing denaturation process of DNA. The Process was carried out by finding a numerical solution of the 4th-order NLS  as stable equation using finite-difference method. Then, the result was be simulated on Matlab. The results show that on the stable state, expand Morse Potential for 4th-order than for 3th-order rastically increased amplitude of oscillation from 1,89 pm to 16 pm. On the first unstable state, the stable equation  was multiplied by (1+ ) where the value of  = 0.25. On the second unstable state, the stable equation  was multiplied two times by (1+ ) where the value of  = 0.25. On three of them, amplitude of oscillation decreased from 16 pm, 2,9 pm to 2,5 pm. Comparing to previous order, there is a new addtion to the 4th-order Morse Potential coefficient  which have physical meaning that larger expansion requires larger dissociation energy as well. So it can be concluded that the PBD model of DNA is descriptively able to explain the biological phenomenon of denaturation in DNA.
Analysis of Vitamin C In UV-Vis Spectrophotometry by SMK-SMTI Students at Bandar Lampung Rudy Situmeang; Gregorius N. Susanto; Sumardi Sumardi; Posman Manurung; Miranti Syafitri; Faradilla Syani; Della M. Andini; Arya R. Syah
Jurnal Kreativitas Pengabdian Kepada Masyarakat (PKM) Vol 6, No 1 (2023): Volume 6 No 1 Januari 2023
Publisher : Universitas Malahayati Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jkpm.v6i1.8103

Abstract

ABSTRAK Kegiatan pengabdian kepada masyarakat khususnya guru dan siswa telah dilakukan di SMTI Bandar Lampung. Sekolah tersebut didirikan untuk menghasilkan teknisi. Salah satu persiapan utamanya adalah praktikum. Pada kesempatan ini, materi pelatihan yang diberikan sesuai dengan perkembangan teknologi untuk praktikumnya, yaitu penentuan kadar vitamin C dalam beberapa jenis buah jeruk menggunakan metode spektrofotometeri UV-Vis. Hasil analisis vitamin C pada tiga jenis buah jeruk (lemon, mandarin dan medan), masing-masing adalah 8,31; 41,86; dan 32,02 ppm. Kata Kunci : Vitamin C, Spektrofotometri UV-Vis, Jeruk Medan, Jeruk Mandarin, Lemon ABSTRACT Community service activities for teachers and students were implemented at SMTI Bandar Lampung, in which the goal of this school is to produce technicians. One of the main preparations is practice. In this activity, the training material prepared was suitable for technological developments. Therefore, the determination of vitamin C content in several types of fruit using the UV-Vis spectrophotometry method was examined. The results for those samples of lemon, mandarin orange, and medan orange were 8.31, 41.86, and 32.02 ppm, respectively. Keywords: Vitamine C, UV-Vis Spectrophotometry, Lemon, Mandarin Orange, Medan Orange
The Effect of H2SO4 Variations on the Synthesis and Characterization of Nanocellulose Using Pineapple Peel Fiber Sitohang, Rosanti; Manurung, Posman; Suciyati, Sri Wahyu; Karo, Pulung Karo
Journal of Energy, Material, and Instrumentation Technology Vol 5 No 2 (2024): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v5i2.168

Abstract

Manufacturing nanocellulose made from pineapple peel fiber has been carried out using acid hydrolysis. This study aims to determine the effect of variations in H2SO4 on the synthesis of nanocellulose in pineapple peel fibers and on the crystal structure, surface morphology, and constituent elements of pineapple skin fiber nanocellulose. The variations of H2SO4 used were 5, 10, 15 and 20%. X-ray diffraction (XRD) and Scanning Electron microscopy (SEM) are characterizations used. The results of XRD characterization showed that the size of the resulting crystallite had met the appropriate size in the range of values from 2.03 – 2.21 nm. The results of SEM characterization show that the image is not porous and lumpy.
Co-Authors Abdurrahman, Ahmad Faruq Adeliya Ayu Anggraini Agus Riyanto Agus Riyanto Agus Riyanto Agus Riyanto Agus Suyatna Ahmad Faruq Abdurrahman Ahmad Rosadi Alfin Edo Kaisar Lubis Amir Supriyanto Anggi Puspita Dewi Anggi Stevani Anggraini, Adeliya Ayu Anggraini, Anisyah Arya R. Syah Ayu Aprilia Ayu Aprilia Benyamin, Chairunissa A Chandra Ertikanto Craig Buckley Delfi Oktavia Amrani Della M. Andini Dita Rahmayanti Donna Agnesia Dwi Asmi Edi Suharyadi Ediman Ginting Ediman Ginting Ediman Ginting Ediman Ginting Suka Erika Sempana Erika Sempana Ginting Fajar Nurjaman Faradilla Syani Fatia Ulfah Fegi Liani Firdaus, Iqbal Flora Rosdiana Lumbansiantar Futichah Futichah Futichah Futichah Gregorius N. Susanto Gultom, Rysa Sonya Reni Paulin Gurum Ahmad Pauzi Hasni Handayani Hesti Wahyu Handani Imaniar Romaeni Indra Pardede Iqbal Firdaus Irma Yulianti It Meng Low Jayanti Pusvitasari Johar Sitohang Junaidi Junaidi - Junaidi Junaidi Junaidi Junaidi Junaidi Junaidi Junaidi Junaidi Juniati Br Simbolon Karo Karo, Pulung Karo, Pulung Karo Ketut Putra Wijaya Lady Permatasari Lusi Vusfita Sari Maharani Maharani Maharani, Renita Marjunus, Ronius Marjunus, Roniyus Mega Pertiwi, Mega Mey Puji Astuti Miranti Syafitri Mitra Septanto Nabilah Rafidiyah Nadia Febriyanti Nita Susanti Nola Fricilia Nurcahayaniati, Hikmah Nurqori Setiawati Nurul Oktavia Prastica, Lusia Puji Lestari Pulung Karo-Karo Pulung Karo-karo Pulung Karo-Karo Putri, Faradilla Nabila R. Supryanto Rahayu, Sri Rahma Fauza Rahmayanti, Dita Renita Maharani Fauzi Rika Rahayu Riska Trisna Nuraini Riyanto, Agus Rizki Amalia Rudy Situmeang Rudy Situmeang Rudy T M Situmeang S Suprihatin Sahtoni Sahtoni, Sahtoni Salwa Dian Pertiwi Sari, Tria Permata Sembiring, Simon Sempana, Erika Shabrina, Shabrina Yakosati Simon Sembiring Simon Sembiring Simon Sembiring Simon Sembiring Siti Fadilah Sitohang, Rosanti Sri Rahayu Sri Ratna Sulistiyanti sri wahyu suciayti Sri Wahyu Suciyati Sri Wahyu Suciyati Suharyadi, Edy Sukma Wibowo Sumardi . Sumardi, Sumardi Sumiyati Sumiyati Supardi Supardi Suprihatin Suprihatin Suprihatin Suprihatin Suprihatin Suprihatin Suprihatin Suprihatin Suprihatin Supriyanto, Amir Surya Prihanto Syafriadi Syafriadi Syafriadi Syafriadi Syafriadi Tria Permata Sari Trianasari Trianasari Trianasari, Trianasari Vega Rahmawati Ar Vidi Nurhidayah Wasinton Simanjuntak Windhini Anggraeni Yanti Yulianti Yanti Yulianti Yanti Yulianti Yanti Yulianti Yanti Yulianti Yanti Yulianti Yuant Tiandho Yudhistira Novita Handayani Yunita Yunita Yusril Al Fath Zaharani, Rethanita Zahra Maria Ulfa