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Peraturan Presiden Republik Indonesia Nomor 43 Tahun 2012 Tentang Universitas Pedidikan Indonesia sebagai Perguruan Tinggi yang Diselenggarakan oleh Pemerintah
Full text linkPeraturan Menteri Pendidikan dan Kebudayaan Republik Indonesia Nomor 5 Tahun 2012 Tentang Sertifikasi Guru dalam Jabatan
Full text linkPotensi Penghematan Energi Pada Industri Farmasi
Full text linkThis research is focus to identify and calculated energy saving potential in pharmaceutical industry. Energy audit procedure is done by measure electrical power for each electrical industrial devices. Monthly electricity consumption for two years is investigated to know electricity pattern for this industri. Elctricity pattern can be used to measure electricity efficiency of this industry. The result show that this industry is over estimate on power supply from the grid. It’s investigated that 3.835.178,-IDR/month is loss. By using 200 kW gas/diesel cogeneration engine will be save 65.8 kW power
Nonlinear Finite Element Analysis of Pressurized LPG Toroidal Tank with Radial Flush Nozzle
Full text linkThis paper reports a nonlinear finite element analysis of pressurized circular toroidal tank with radial flush cylindrical nozzle used for gas fuel tank of personal car. The analysis determines the position of radial cylindrical nozzle that gives the highest limit pressure. Toroidal tank having volume of 45 liters and radius ratio of 3 were used in this analysis. Cylindrical nozzle of 12.5 mm diameter and 10 mm height was attached in radial direction of toroidal cross section. The position of nozzle was checked for five points: extrados, 450 from extrados, crown, 450 from crown, and intrados. The maximum applied internal pressure was 1.5 times pressure to yield. Limits pressure were obtained via nonlinear finite element analysis using the well-known Newton-Raphson algorithm with large deformation. It was found that the best design for nozzle position, indicated by the highest limit pressure, is located at the extrados. For any circumstances, nozzle can be located between extrados and crown, but should not be located between crown and intrados. This result conforms to the membrane theory that the highest stress in toroidal shell under internal pressure occurs at intrados and nozzle shall not be located next to that location
Studi Komparasi Pemanfaatan Aktivator NaOH dan KOH Pada Aktivasi Basa-Fisik Zeolit Pelet Tekan Terhadap Konsumsi Bahan Bakar dan Daya Engkol Motor Diesel 4-Langkah
No full textKrisis energi selalu terjadi di belahan bumi ini setiap tahunnya, khususnya di Indonesia.Hal ini terlihat dari banyaknya antrian di banyak SPBU di seluruh wilayah Indonesia.Zeolit alam Lampung dapat memberikan solusi terhadap permasalahan ini. Kemampuan zeolit alam dalam menghemat konsumsi bahan bakar motor bakar telah dibuktikan oleh Herry Wardono. Zeolit aktivasi kimia-fisik mampu memberikan hasil terbaik.Aktivator basa yang digunakan selama ini adalah NaOH 0,5N.Masih ada aktivator basa lainnya yang belum pernah diujikan untuk aplikasi pada motor bakar.Dalam penelitian ini, aktivator basa yang digunakan divariasi, yaitu NaOH dan KOH dengan variasi normalitas 0,25N, 0,5N, 0,75N, dan 1,0N. Massa zeolit pelet tekan yang digunakan yaitu 100 gr. Dari hasil penelitian terlihat bahwa zeolit pelet tekan KOH-fisik mampu menghemat konsumsi bahan bakar lebih tinggi dibanding zeolit pellet tekan NaOH-Fisik. Penghematan kosumsi bahan bakar tertinggi terjadi sebesar 10,2197% (KOH 0,75N) dan 9,7839% (NaOH 0,75N), yang terjadi pada putaran mesin 1500 rpm. Sedangkan peningkatan daya engkol terbaik didominasi zeolit pelet tekan NaOH-Fisik, yaitu sebesar 6,3175% (NaOH 1,0N) dan sebesar 5,2914% (KOH 1,0N), yang terjadi pada putaran mesin 3000 rpm.\ud
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Kata Kunci : perlakuan udara pembakaran, zeolit pelet tekan, prestasi motor diesel.\u
Sintesis Membran Zeolit NaA untuk Dehidrasi Campuran Alkohol-Air dengan Proses Hidrotermal
Full text linkInorganic zeolite membrane NaA was known having high selectivity on liquid-liquid or gas-gas separation. Zeolite membrane NaA can be synthesized on α-alumina support with hydrothermal treatment. The solution of mole composition which used to make zeolite membrane NaA is NaOH:Al()H)3:SiO2:H2O, successively 2:1:2:120. XRD results showed that the membrane which made was zeolite NaA. Characterization result by using Scanning Electron Microscopy (SEM) was known that thickness of zeolite membrane NaA reaches 5 µm and nanocomposite zeolite NaA which formed on α-alumina support occurred homogeneously. Analysis of ethanol and methanol which produced in the product < 0.01%, and the flux permeate which produced is 0.3 and 0.5 kg/m2.h. The best operating condition in manufacturing of zeolite membrane NaA is the crystallization temperature of 110oC for 24 hours.\ud
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Keywords: hydrothermal; membranes; NaA zeolite; α-alumina\u
Rancang Bangun Sistem Informasi Manajemen Terpadu (SIMANTEP)\ud Online PT. PLN (Persero) Sektor Pembangkitan Tarahan Lampung\ud Dengan Metode Extreme Programming
Full text linkSMT’s secretariat is one of the PT. PLN (Persero) Power Generation Sector of Tarahan which is responsible for\ud
document control process. The documents control form start from submission until distribution are still in\ud
manual process, for example, the distributed documents still in the hardcopy. This research creates the\ud
Integrated Management Information System or SIMANTEP Online which is an integrated information system\ud
that gave online service of documents management at PT. PLN (Persero) Power Generation Sector of Tarahan\ud
Lampung. The information system is made using Extreme Programming (XP), one of Agile Development\ud
Methods. The result of this research is an online information system which is not only accessible in Tarahan\ud
PLTU’s office area, but also can be accessed by the internet. The SIMANTEP Online also provides convenience\ud
for the user in terms of documents management and control, start from the submission, validation, and\ud
distribution of documents with online service
Surat Edaran Dirjen Dikti Nomor 152/E/T/2012 Tanggal 27 Januari 2012 Tentang Publikasi Karya Ilmiah
Full text linkPengaruh Variasi Jenis Aktivator Asam dan Nilai Normalitas Pada Aktivasi Zeolit Pelet Perekat Terhadap Prestasi Mesin Motor Diesel 4-Langkah
No full textThe energy crisis and air pollution can be coped with using very abundant Natural Zeolites available in Indonesia, particularly in Lampung. Herry Wardono has applied the zeolite on petrol and diesel engines. In this applications, Lampung's natural zeolites can significantly save fuel consumption and reduce exhaust emissions of the engines. The best results occurred in the use of chemical-physical activated zeolite. All this time, chemical activator (acidic activator) used was H2SO4 0.2 N, and other normalities of this acid have not been tested, as well as other types of acidic activator. In this research, acidic activators used were H2SO4 and HCl which has a normality of 0.1 N, 0.2 N, 0.3 N and 0.5 N each. The amount of adhesive pelletized zeolite used was also variated, i.e 50, 100, and 150 grams. The results showed that the adhesive pelletized zeolite activated by HCl dominate the best results, with fuel consumption savings of 8.6472% and 10.3058% in the use of 100 and 150 grams of the zeolite. Meanwhile, the highest fuel consumption savings obtained in the use of adhesive pelletized zeolite activated by H2SO4 were 6.2992% and 7.8847%.\ud
Keywords: zeolit pelet perekat, oxygen- rich combustion, prestasi mesin diesel.\u
FREE LIPASES-BASED ENZYMATIC ACETYLATION OF RACEMIC ATENOLOL: A PRELIMINARY KINETIC RESOLUTION STUDY
Full text linkSince distomers of racemic drugs are frequently not used to heal diseases, utilization of single enantiomeric drugs not only decreases the drugs dosages and side effects but also reduces eco-toxicological problem. Since enzymatic membrane reactors (EMR) can be run continuously, observation on free-enzyme catalysis as a preliminary study before development of the EMR is needed. This paper describes acetylation of the racemic atenolol enzymatically using free lipases. The atenolol enantiomers reacted with vinyl acetate in water miscible organic compounds and phosphate buffer solutions. High conversions were obtained once the reactions were conducted in the organic media using PFL (XR: 84.22%, XS: 91.78%), Lipoprotein 62336 (XR: 100%; XS: 100%) and CALB (XR: 77%, XS: 51.82%). Reactions in PO4 buffers produced low conversions. It seems the KR process was difficult to be developed through the acetylation pathway. During observations on the AT enantiomers’ concentrations, the analytical protocols produced excellent selectivities. The highest selectivity was given by the slowest flow rate, which developed higher enantiomeric peak areas