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INDONESIA
METANA
Published by Universitas Diponegoro
ISSN : -     EISSN : -     DOI : -
Core Subject : Science,
Computer Science & IT
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Articles 8 Documents
 1 
Search results for , issue "Vol 3, No 2 (2006): Juli 2006" : 8 Documents clear
Baja Tulangan pada Bangunan Gedung Dharma, Budhi
METANA Vol 3, No 2 (2006): Juli 2006
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5838.336 KB) | DOI: 10.14710/metana.v3i2.1859

Abstract

Abstract In a building structure, concrete need addition capable to arrest, detain attractive force to arise in the system that is bone steel. Bone steel can in the form of weaved steel strand of metal network or bar and cross of matting, and use by plate construction, other structure and listplank, Interesting strand of metal minimum ultimit become militant 170 = 1700 Mpa, and strand 180=            1800 Mpa. Nature of physical become militant bone that is tension melt, and elastic modulus, can be seen by tension diagram and steel bone bar strain, and specification for iron used by standard of JIS nad PBI 197l. For the iron of artless iron and also thread of quality determined by nature of ats chemical formation and physical installation of bone have to fulfill economic and technical requipment, because concrete iron reprsent costly shares at reinforce concrete system. Extention out down by place which shouldering smallest momen effect of encumbering, by tacking on gasses and mechanic. Depository of bone steel conducted in such a manner to be able to prevent distortion, corrosion, damage and contamination.   Key word : bone steel.
EKSTRAKSI ASAM LEMAK OMEGA - 3 DARI LIMBAH IKAN TUNA Jos, Bakti
METANA Vol 3, No 2 (2006): Juli 2006
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4396.6 KB) | DOI: 10.14710/metana.v3i2.1804

Abstract

Abstract Tuna waste still have a valuable substance that is fish oil, which contains omega-3 fatty acid. Omega-3 is polyunsaturated fatty acid, consist of two acid, eicosapentaenoic acid (EPA) and  dokosahexanoic acid (DHA). Omega-3 fatty acid has many usefulness for human’s health, related to heart, retina, and brain function. This research is done to get omega-3 fatty acid from tuna waste by extraction method using n-hexane. The purposes of the research are to learn about variables that affect the product and decide the condition to get optimal product. The research method is making table and chart from the variables. The condition of the operation are : temperature ± 30oC, solvent n-hexane, KOH concentration is 40 gr/liter, and concentration of oil in feed is 0.068 gr/cc. The variables are : comparison of solvent and feed (10:4; 15:4; 20:4; 25:4; 30:4; 35:4) at period 1,5 jam, and period of extraction (0,5; 0,75; 1; 1,25; 1,5; 1,75 jam) at comparison of solvent and feed 30:4. The result shows that the optimal condition is reached at comparison of solvent and feed 30:4 and period of extraction 1,5 hour. The rendement is 24,76%. Key words : tuna, omega-3, extraction
Beban Alternator Fasa Tiga Simulasi Dalam Laboratorium Yuwono, Teguh
METANA Vol 3, No 2 (2006): Juli 2006
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6692.894 KB) | DOI: 10.14710/metana.v3i2.1857

Abstract

Abstract   Electrics usage by consumer according to its requirement. Burden of electrics usage by assorted consumer, but the conclusion burden of electrics usage is have the character of the resistive, capacitive and inductive. Physicly in the form of resistor, inductor, and capacitor. Burden in electrics usage not stand-alone but became to one union of network of requirement of usage electrics energy. In electrics three phasa, burden can be linked by a star or delta, at same burden linked by a star or delta will permeate the same electrics energy but differing at current ampere and voltage.   Keyword: resistor; inductor; capacitor; star and delta connection.
Penerapan Produksi Bersih pada Proses Painting Steel Sebagai Upaya Minimasi Limbah (Studi Kasus Pada Industri Perakiton Sepeda Motor) Priyambada, Ika Bagus
METANA Vol 3, No 2 (2006): Juli 2006
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6602.502 KB) | DOI: 10.14710/metana.v3i2.1860

Abstract

Abstract   Painting Steel process in some automotive industries uses Spray methode, but this methode produce more liquid waste and solid waste. Waste minimization that can be done by Cleaner Production through implementation of Cotionic Electro Deposition (CED) methode. This methode has a purpose to reduce liquid waste and solid waste to achieve minimum environmental effects. After a comparization beetwen Spray methode and CED methode based on the amount of production, paint consumption, watter consumption, electrical consumption, man power consumption ond waste from the production, the result is CED methode has more economical benefit as much as Rp 556.736. 178,00/month. This analyz  doesn't  snatch investment.   Key words : Cleaner Production, Spray methode, CED methode, saving  
EKSTRAKSI EUGENOL DARI MINYAK DAUN CENGKEH DENGAN PELARUT NaOH DAN n-HEKSAN Arifan, Fahmi; Yulianto, Mohamad Endy
METANA Vol 3, No 2 (2006): Juli 2006
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5000.774 KB) | DOI: 10.14710/metana.v3i2.1805

Abstract

Abstract   Clove oil represent other side result from clove plantation. Clove leaf oil used permanent upon which to make isolateband derivative in many industry. In this research analyse concentration influence and ratio of solvent – bait to yielded product rendemen. In a proses insulation of eugenol used process high rise liquid extraction. As a raw material is leaf clove oil, NaOH and n-heksan used as a solvent. In extraction with NaOH will be yielded Na eugenolat, so that have be eliminated the content of Natrium by using HCl 2 N. Later then its result be reextracted by using n-hexan. So that obtained pure eugenol and with randemen which is more. Ever greater of used solvent volume and concentration, hence eugenol which is extract will progressively mount.   Key Word : eugenol, extraction
STUDI PENGARUH TEMPERATUR AUSTENITIASI DAN HOLDING TIME PADA PROSES HARDENING BAJA K 460 Suyadi, Suyadi
METANA Vol 3, No 2 (2006): Juli 2006
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/metana.v3i2.1806

Abstract

Abstract on the harcening process of K 460 steel, austenite temperature and holding time plays very important roles in influencing the result of hardening. In this research, austenite tenrperature variatiorrs are 755oc, 770 oc,785oc. 8l5oc, and 840oc with holding time of 5'30',60' and 120'. Then research result indicates that on 755oc. variation of the holding time produce high increase of hardness. For the others temperature need 30' to reach homogeny phase and more 30' holding time make the hardness relative constant. Meanwhile, the impact strength would be varied caused by intemal stress and residual austenite. For statistical analysis with 99oc accuracy, it's found that the effect-of temperature and holding time and it's both interactions make the number of hardness and the impact strength grow significantly.   Key words : hardening, temperature austenite, holding time
APLIKASI RHIZOPUS OLIGOSPORUS, RHIZOPUS ORYZAE, ISI TUBUH KEPITING DAN ENZIM BROMELIN PADA BIOEKSTRAKSI KRIM SANTAN KELAPA MENJADI VIRGIN COCONUT OIL Kusumayanti, Heny; Susanti, Margaretha Tuti; Yulianto, Mohamad Endy
METANA Vol 3, No 2 (2006): Juli 2006
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3478.871 KB) | DOI: 10.14710/metana.v3i2.1856

Abstract

Abstract   Oil production process with fermentation is one of method to produce virgin coconut oil (VICO). In this research, fermentation process done with coconut extract fermentation method as substrate, with biocatalysator, are Rhyzopus oligosporus, Rhyzopus orizae, body of crab and bromelin enzyme from raw pineapple. Design which used is a completed blocked random design. Source of variation is comparison of starter and substrate. From research which has done by biocatalysator, the most effective is Rhyzopus oligosporus with comparison starter and substrate 0,75 : 1, with velocity agitation 150 rpm, produce efficiency 90,23 % test of peroxide number until five weeks keep is 2,7-4,4, acid number 0,02, iod number 8,1, this result is comformable with food oil standard.   Key words : coconut extract – fermentation – Virgin coconut oil (VICO)
Alternator Fasa Tiga 12 Volt Untuk Praktik di Laboratorium Yuwono, Teguh
METANA Vol 3, No 2 (2006): Juli 2006
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6807.99 KB) | DOI: 10.14710/metana.v3i2.1858

Abstract

Abstract   Performing an equipment to train the skille area student of costly adequate 3 phase alternator encumbering enough. so that student  fulled the requimen learn  skilled of encumbering of 3 phase alternator, need there is solution of levying of unit the skilled alternator 3 phase. One of the way is make by self, modifying car alternator become the 3 phase alternator.   Keryord: emf alternator

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