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INDONESIA
METANA
Published by Universitas Diponegoro
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Core Subject : Science,
Computer Science & IT
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Articles 198 Documents
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ASIDOLISIS ENZIMATIS MINYAK SAWIT MERAH DAN MIINYAK IKAN TUNA DENGAN BIOKATALIS LIPASE PADI MENGHASILKAN ASAM LEMAK KAYA OMEGA -3 Wahyuningsih Wahyuningsih; Margaretha Tuti Susanti; Moh Endy Yulianto
METANA Edisi Khusus Februari 2011
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7031.628 KB) | DOI: 10.14710/metana.v0i0.1659

Abstract

Abstract   Red palm oil is source of p carotene and vitamin E, while Tuna fish is source of omega-3 and 6. Diversification of palm oil and tuna fish oil can be used as food supplement. The utilization of high concentration of minor vitamin is one of strategy to increase the additional value of both oil and also to provide minor vitamin from local product in order to increase the healthy of the society. There was some research conducted on micro encapsulation process of red palm oil which is rich of P carotene, provitamin A, and provitamin E. And there was also research subjected to microencapsulated fish oil which is rich of omega-3. In this research we combined the microencapsutaion of both red palm oil and tuna fish oil through enzymatic cytolysis process. From the cytolysis process, we will got type of fatty acid which is rich of omega 3 and P carotene . The objective of the research were to study the activity of rice bran lipase as biocatalisator in the conversion of palm oil fatty acid into fatty acid which is rich of omega-3, and to develop the bioreactor for the enzymatic cytolysis for fatty acid production. The research result showed that optimum condition for the cytolysis process was the ratio of red palm oil tuna fish oil 3:1, temperature 40oC; reaction time 4 hours, where the yield of fatty acid has EPA and DHA concentration 35,92% and 5,65%, respectively. While the rate of the reaction was 619,67 mol/hour. Red palm oil is an alternative source of fatty acid which is rich of omega 3 (EPA and DHA), and it can be produced by enzymatic cytolysis by using rice bran lipase. Lipase enzyme of R Meithei found to be a good biocatalyst in the red palm oil and tuna fish incorporation process of the fatty acid which is rich of omega-3.   Key words: citolysis, red palm oil, tuna fish oil
Pengaruh Perbaikan Instalasi Penerangan Terhadap Tahanan Isolasi, Tegangan Dan Kuat Cahaya Yang Dihasilkan Setiono, Iman; Moedijono, Moedijono
METANA Vol 12, No 1 (2016): Juni 2016
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (937.441 KB) | DOI: 10.14710/metana.v12i1.17508

Abstract

Fungsi dari lampu adalah untuk membuat penerangan buatan khususnya pada malam hari. Tingkat kualitas pencahayaannya menjadi prioritas agar supaya lampu dapat diberdayakan se maksimal mungkin. Beberapa faktor yang mempengaruhi kualitas tingkat pencahayaan pada lampu adalah keandalan instalasi, stabilitas besarnya tegangan listrik dan kualitas lampunya sendiri. Dengan berdasarkan faktor yang tersebut diatas , maka dilakukan  perbaikan instalasi penerangan.Yang menjadi tujuan dari program ini adalah untuk memperbaiki instalasi penerangan sehingga dapat di berdayakan semaksimal mungkin. Metode yang digunakan adalah teknis aplikatif, artinya dilakukan dengan langsung terjun kelapangan untuk memberikan contoh cara-cara memperbaiki lampu penerangan yang baik dan benar sesuai dengan kaidah yang ada.Hasilyang diperoleh ternya ada pengaruh antara kualitas instalasi penerangan dengan tahanan isolasi , tegangan kerja lampu , serta kuat cahaya yang dihasilkan.Harga tahanan isolasi meningkat secara signifikan berkisar antara 200 sampai 218 M ohm, tegangan kerja antara 198 sampai dengan 220 volt , sedangkan kuat cahaya yang dihasilkan adalah ntara 1460 sampai dengan 1500 lumen. Hal ini dapat dipahami karena dengan instalasi yang bagus , maka kerugian-kerugian yang ditimbulkan karena instalasi sudah saat diganti dapat dihindari , hal sesuai ketentuan yang ada di Peraturan Umum Instalasi Listrik.(PUIL). Abstract Effect of Improvement of Lighting Installation on Isolation Resistant, Voltage And Strong Light Generated The function of the lamp is to make artificial lighting especially at night. The level of lighting quality is a priority so that the lights can be empowered to the maximum possible. Some of the factors that affect the quality of the lighting level on the lamp are the reliability of the installation, the stability of the magnitude of the voltage and the quality of the lamp itself. Based on the factors mentioned above, the repair of lighting installation is done. The goal of this program is to improve the lighting installation so that it can be done as much as possible. The method used is technical applicative, meaning that is done with direct plunge spaciousness to give examples of ways to improve the lighting of good and correct in accordance with existing rules. The result is that there is an influence between the quality of the lighting installation with the isolation resistance, the working voltage of the lamp, and the resulting light strength. The insulation resistance rate increases significantly between 200 to 218 M ohms, the working voltage is between 198 to 220 volts, Resulting from 1460 to 1500 lumens. This can be understood because with a good installation, the losses caused by the installation when replaced can be avoided, in accordance with the provisions of the General Electric Installation Regulations (PUIL). 
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  
Pemanfaatan Minyak Goreng Bekas Menjadi Sabun Mandi Antonius Prihanto; Bambang Irawan
METANA Vol 14, No 2 (2018): Desember 2018
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (486.223 KB) | DOI: 10.14710/metana.v14i2.11341

Abstract

Rekayasa produk limbah untuk mengurangi pencemaran dapat memberikan nilai lebih terhadap produk yang di hasilkan. Upaya pemanfaatan limbah minyak goreng bekas untuk diolah menggunakan rekayasa proses menjadi produk yang lebih berguna berupa sabun mandi. Penelitian ini dilakukan untuk mengkaji pengaruh konsentrasi NaOH dan suhu proses terhadap kualitas produk sabun mandi. Pada tahap persiapan, minyak goreng bekas dibersihkan dari pengotornya melalui proses filtrasi dan penetralan dengan larutan NaOH. Minyak goreng bekas yang telah murni dan jernih  selanjutnya direaksikan dengan larutan NaOH dengan variasi konsentrasi NaOH 25 %, 30 %, 35 %, 40 % dan 45 %  pada suhu proses dengan variasi 30 oC, 35 oC, 40 oC, 45 oC dan 50  oC. Hasil penelitian menunjukkan pada konsentrasi larutan NaOH 25 %  menghasilkan kualitas sabun terbaik dengan kadar alkali paling kecil yaitu 0.0272 %
KINETIKA HIDROLISIS TRIGLISERIDA RBDPO MENJADI CAMPURAN ASAM LEMAK Alamsyah, Andi Nur
METANA Vol 8, No 02 (2012): Desember 2012
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (244.856 KB) | DOI: 10.14710/metana.v8i02.6807

Abstract

Indonesia is one of largest producer of vegetable oils especially palm oil. The Palm oil commodity is potential to develop. One of the products is fatty acid. Enzymatic hydrolysis with lower pressure and temperature is the method to produce fatty acid. The aim of this research was to develop a kinetic of reaction of hydrolysis to produce fatty acid. The advantage of this research is obtaining an equation rate of enzymatic hydrolysis reaction which could be used to design a commercial scale reactor. A simple Michaelis-Menten model was used to obtain the equation of rate. By non-linear regression curve fitting the equation was tend to first order model, then linear and non-linear regression were utilized to the first order equation rate of reaction. The highest constant was of 0.07minute-1 which obtain from 40oC and w/o ratio of 1:2. Keywords: fatty acid, kinetic of hydrolysis
BIODIESEL DENGAN ALTERNATIF BAHAN BAKU MINYAK NABATI BARU DAN BEKAS Kusumayanti, Heny; Puspitasari, Nurul
METANA Vol 4, No 1 (2007): Juni 2007
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4168.395 KB) | DOI: 10.14710/metana.v4i1.1715

Abstract

Abstract Biodiesel represent one of substance of alternative of fuel substitution which can be innovated and friendly environmentally. This Biodiesel earn also made plainly  and  exploit the existing substance around. Price from raw material its maker also cheap enough. The example by using new vegetation oil and ex-vegetation oil. Process of with the process transesterifikasi, that is dissolve the oil by NaOH and methanol. Later then mingled and yield two coat after hushed 8 clock that is flake is biodiesel and substratum is gliserol. Examination conducted by experience is combustion by using tinder and with the iron rasher Keywords : biodiesel, oil
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
Efikasi Formula Insektisida Berbahan Aktif Propoxure Dan Malathion Terhadap Vektor Penyakit DBD Supriyo, Edy; Broto, R.T.D. Wisnu; Pujihastuti, Isti
METANA Vol 14, No 1 (2018): Juni 2018
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (892.068 KB) | DOI: 10.14710/metana.v14i1.19163

Abstract

Beberapa formula insektisida tidak efektif untuk membasmi vektor penyakit Demam berdarah dengue sehingga digunakan formula kombinasi beberapa insektisida golongan organofosfat dan karbamat yang terbukti memenuhi standar Komisi Pestisida Indonesia. Penelitian ini bertujuan untuk  menguji efikasi formulasi campuran golongan organofosfat dan karbamat terhadap vektor DBD Aedes aegypti strain Semarang. Formulasi insektisida yang digunakan mempunyai komposisi propoxure 17 %, Malathion 3 %, agrisol 13 %, DBS 7 %, Xyline 55 %, dan additive 5 % (% berat). Uji efikasi (uji LD 50)dilakukan dengan menggunakan hewan uji nyamuk Aedes aegypti strain kota Semarang. Sebelum digunakan uji efikasi, formula insektisida cair diencerkan  10 kali dengan pelarut adthiner. Uji efikasi menunjukkan bahwa semua hewan uji tersebut 90% mati pada dosis 0,250 cc/L sehingga disimpulkan bahwa dosis yang terbaik untuk digunakan pada foging adalah 0,250  cc/ L.  Effication Test Of Insecticide Formula With Active Ingredient Of Propoxure And Malathion To DBD Disease Vector Several insecticide formulae have not been effective to eridicate the vector of dengue fever disease therefore the combination some insecticide of organophosphate and carbamate has been proved to match with Indonesian Pesticide Commision. The present work was aimed to do the effication test of  insecticide formulation of organophosphate and carbamate on vector of DBD. Insecticide formulation were consisted of 17 % propoxure, 3 % Malathion, 13 % agrisol, 7 % DBS, 55 % Xyline, and 5 % additive (% weight). Effication test (LD 50)use mosquitoes of Aedes aegypti Semarang strain. Prior the test the insecticide formulation was diluted 10 times with adthiner solvent. Effication test showed that 90%  mosquitoes was killed at dose of formulation 0,250 cc/L. Therefore it is conclused that 0,250 cc/L of insecticide formulation was recommed for Aedes aegypti fogging.
DAMPAK PROGRAM PENGELOLAAN SAMPAH BERBASIS MASYARAKAT SEBAGAI SALAH SATU PROGRAM CORPORATE SOCIAL RESPONSIBILITY BADAK LNG TERHADAP PEMBENTUKAN BUDAYA HIJAU (GREEN CULTURE) PADA MASYARAKAT KOTA BONTANG Sunaryo, Busori; Susanti, Pratiwi Rini; Irkham, Agus M
METANA Vol 9, No 02 (2013): Desember 2013
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (60.832 KB) | DOI: 10.14710/metana.v9i02.7616

Abstract

Abstract Bontang as a growing municipality continuously develops all aspects of life. One of negative effects of every developing  city is the increase in the volume of its community waste. Until July 2011 the daily volume of Bontang waste is at average of 54,41 tonnes or 1.686,81 tonnes in July 2011. The waste issue mismanagement will potentially cause some decreases on the quality of  society health, environmental problems, and economy lost. Badak LNG as a key stakeholder of Bontang City was called to solve this waste management issue. In the frame of Corporate Social Responsibility-CSR program, Badak LNG created a special program which was called “A Society-based Plastic Management” as an alternative. It consists of  a series of programs such as  waste bank, training for 3R (Reduce, Reuse, Recycle), repacking of carton waste for recycle, and small scale business of waste plastic chopping which now involves 13 groups consisting of 94 members. Based on the empirical study the writer has done, this “ Society-Based Plastic Management” has not only creates products (output) and outcome, but also has created a shared value of green culture towards Bontang community. Key words : Waste, CSR, Green Culture,Plastic chopping small scale business.  
KARAKTERISTIK FISIK MAKANAN PENDAMPING ASI TERFORTIFIKASI PREBIOTIK DARI TEPUNG UMBI PORANG (AMORPHOPHALLUS ONCOPHYLLUS) TERFERMENTASI Wardhani, Dyah Hesti; FIrfandy, Fauzan; Meiliana, Winda Tria
METANA Vol 11, No 01 (2015): Juli 2015
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (634.796 KB) | DOI: 10.14710/metana.v11i01.12576

Abstract

Abstrak Pemberian asupan gizi yang baik sangat vital bagi pertumbuhan dan perkembangan anak. Makanan Pendamping ASI (MP-ASI) diberikan kepada bayi umur 4 sampai 24 bulan. Prebiotik memiliki fungsi penting bagi kesehatan bayi antara lain meningkatkan jumlah bifidobacteria dan lactobacilli yang mampu menekan pertumbuhan bakteri patogen, meningkatkan daya tahan, dan membantu penyerapan makanan menjadi lebih baik. Salah satu sumber prebiotik yang berpotensi diproduksi di Indonesia adalah manooligosakariada (MOS). MOS didapatkan melalui fermentasi glukomannan yang banyak terkandung pada umbi porang (Amorphophallus oncophyllus). Tujuan dari penelitian ini adalah mempelajari efek penambahan tepung porang hasil fermentasi terhadap karakteristik MP-ASI. Hasil penelitian menunjukan penambahan tepung porang terfermentasi meningkatkan densitas kamba, daya serap air, viskositas, dan swelling power bubuk bubur bayi. Waktu fermentasi berpengaruh positif terhadap densitas kamba dan daya serap air namun menurunkan viskositas dan swelling power. Nilai proksimat tepung bubur bayi yang memiliki sifat fisik paling mendekati tepung bubur bayi komersial (rasio 60% tepung porang terfermentasi 3 hari dan 10% tepung beras merah) belum memenuhi KepMenKesRI no. 224/Menkes/SK/II/2007. Bubuk bubur bayi rasio ini mempunyai kadar protein 2.24%, lemak 0.67%, air 13.13%, karbohidrat 66,82 %, dengan nilai energi sebesar 536 kkal. Hasil ini menunjukan bubuk bubur hasil masih perlu dimodifikasi agar memenuhi standar. Kata kunci: fermentasi, glukomannan, MP-ASI, porang, prebiotik, sifat fisik Abstract Providing an excellent nutrition is very cruisial for the growth and development of children. Weaning foods are given to infants aged 4 to 24 months. Prebiotics have important functions for the health of infants, including increasing the number of bifidobacteria and lactobacilli which suppress the growth of pathogenic bacteria, increasing immun system, and helps better food absorption. One potential source of prebiotic which is anable to be produced in Indonesia is manooligosakariada (MOS). MOS has potential to be produced in Indonesia through fermentation of glucomannan, a major compound of porang tuber (Amorphophallus Spp). Hence, the objective of this research was to study the physical characteristisc of weaning foods fortified with fermented porang flour. The fortification improved bulk density, water absorption, viscosity and swelling power of the weaning foods. Fermentation period had a positive impact on bulk density dan water absorption, however, reduced viscosity and swelling power. The proximat of the weaning food at ratio 60% of 3-day fermented porang and 10% brown rice had not met KepMenKesRI no. 224/Menkes/SK/II/2007 yet. This weaning food which contained 2.24% protein, 0.67% fat, 13.13% water, 66,82% carbohydrate, 536 kkal was still required further composition modification. Keywords: fermentation, glucomannan, weaning food, porang, prebiotic, physical properties   

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