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Jurnal Teknologi Pertanian
Published by Universitas Brawijaya
ISSN : 14115131     EISSN : 25282794     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Computer Science & IT
Jurnal Teknologi Pertanian diterbitkan oleh Fakultas Teknologi Pertanian Universitas Brawijaya untuk penyebarluasan hasil penelitian yang dilakukan oleh para peneliti dari dalam dan luar Fakultas Teknologi Pertanian Universitas Brawijaya. Jurnal Teknologi Pertanian terbit tiga kali dalam setahun, memuat tulisan hasil penelitian yang termasuk dalam lingkup disiplin ilmu pengetahuan yang terkait dengan Ilmu-ilmu Teknologi Pertanian guna menunjang pengembangan ilmu pengetahuan dan teknologi serta pembangunan nasional.
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Articles 570 Documents
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Partial Characterization of Crude Protease Extracted from Bacillus amyloliquefaciens NRRL B-14396 W., Novita; Arief, K.; Nisa, F. C.; Mardiyatmo, U.
Jurnal Teknologi Pertanian Vol 7, No 2 (2006)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

This research was aimed to determine the characteristics of crude proteases extracted from Bacillus amyloliquefaciens NRRL B-14396, namely the stability of enzyme during storage at low temperature, the optimum pH and temperature, kinetic constants (Vm and Km) and some inhibitors and activators that influence the enzyme activity and to evaluate the stability of enzyme during storage at low temperature. The results showed that the stability of protease extracted from Bacillus amyloliquefaciens NRRL B-14396 decreased with time when stored at 4oC. It was found two classes of protease, i.e. the one with an optimum pH of 7.5, classified as the neutral protease, and that with the optimum pH of 9.0, known as alkaline protease. The activity levels of the neutral and alkaline proteases were 0.475 Unit/ml and 0.410 Unit/ml, respectively. The optimum temperature was 50oC, at which the activity level was of 0.516 Unit/ml. Ca2+ ion functions as a stabilizer whereas Zn2+ and Fe2+ ions as activators. The addition Mg2+ ion, SDS, and EDTA inhibited the activity. The respective values of Km and Vm of the neutral protease were 0.167% and 0.633 Unit/ml, while those values of the alkaline protease were 0.661% and 0.924 Unit/ml. Key words: characterization, protease, Bacillus amyloliquefaciens.
Application of Analytical Hierarchy Process Analytical Hierarchy Process Analytical Hierarchy Process Analytical Hierarchy Process Method Method Method Method t tt to Analyze Factors o Analyze Factors o Analyze Factors o Analyze Factors t tt Dewi, Ika Atsari; Santoso, Imam
Jurnal Teknologi Pertanian Vol 8, No 1 (2007)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

Fishballs increase its popularity recently in Indonesia, following the previously knownproduct which is made up of meat, the meatballs.  Fishballs are now mass produced andmay be found in both modern and traditional markets. Like other products, the consistencyof the fishballs quality needs to be established and maintained to meet the marketdemand. The objective of this study was to analyze factors determining the quality ofpackaged fishballs. Factors considered to determine its quality are the raw materials,production process, the products’ chemical and organoleptic characteristics, as well as itspackaging and storage. The Analytical Hierarchy Process (AHP) method and the CriteriumDecision Plus software were used in the study.  The results indicated that the quality of flour and mixing process were the mostinfluencing factors to the quality of the packaged fishballs made up of a certain fishspecies. The protein content and the colour of the fishballs may be used as good indicatorsof the product quality. The use of flexible film and low temperature were likely the bestcondition for storage of the packaged fishballs.Keywords: fishballs, Analytical Hierarchy Process, quality
Conveyor Control System Design using The AT86C51 Microcontroller for Sorting of Sweet Orange (Citrus sinesis L.) based on Their Physical Appearances Argo, Bambang Dwi; Yogantoro, Nova
Jurnal Teknologi Pertanian Vol 8, No 1 (2007)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

Considering the plantation area and annual production, orange is the third mostimportant commodity after banana and mango. Orange from harvesting has varietymaturity and dimension so that needs sorting. Manual sorting cannot yield election ofquality maximally.  The use of automated mechanical sorting for agricultural produces is expected notonly to eliminate boring and time consuming jobs, but also to reduce cost by minimizing oflabors. This particular research was conducted to develop and to test a conveyor controllersystem using a PC equipped with the AT89C51 microcontroller, as an automatedmechanical sorting system for mandarin oranges. The fruit was put on the runningconveyor at which the image was recorded and then input to the developed system. Thefruits classification was based on their physical appearances.  The developed system consisted of two main parts: the mechanical subsystem, i.e. aconveyor which was equipped with the classification mechanism and the electronicssubsystems, i.e. the AT 89C51 microcontroller that serially connected with a PC,functioned as the main controlling unit.  Test results showed that the position control system worked according to theprevious expectation. The average conveyor slip was 6.87 % resulted from the V-belttransmission. The precision of the halted fruit under the imaging unit was greatlyinfluenced by the positioning of the light sensors, rotation of motor, and the position of theimaging camera. The average capacity of the system based on the imaging analysis timeand the motor rotation were 213 fruits/hour (43.07%) and 442 fruits/hour (89.41%),respectively. They were lower than the ideal capacity of  495 fruits/hour.Key words: Mandarin Oranges, Sorting, AT89C51 Microcontroller
Application of Artificial Neural Network System for Demand Forecasting of Rubber Commodity Rss-1 Produced by an Indonesian Government-Owned Company Santoso, Imam; Effendi, Usman; Fauziya, Cicik
Jurnal Teknologi Pertanian Vol 8, No 1 (2007)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

Artificial neural network (ANN) system, an information computing processor, is developed to resemble the natural biological neural network system. Like the biological one, the ANN system is able to learn, store, and process or to interpret the new data input based on the previous set of values. Therefore the ANN system may be used as a tool for forecasting. This research was run to forecast demand on the rubber commodity, RSS-1, produced by an Indonesian government-owned estate company. The ANN system was modeled as a multilayer feed forward network by means of a back propagation as a learning algorithm. A sigmoid function was used as the activating function, whereas the learning rate (lr), momentum (mc), and maximum epochs 100.000 were added to accelerate the learning process. The training results showed the developed ANN system worked very well. There network operated on the structure of 2-5-4-1 with the respective value of lr = 0.01 and mc = 0.9. This structure was able to recognize the causal design between the demand, the price and stocks of RSS-1 rubber at the company by rationality of network learning results, known as MSE, at a level of 0.69%.Keyword: Artificial neural network, demand forecasting, rubber
The Use of - R Control Chart on The Filling Process at A Particular Pasteurized Milk Industry in Malang Santoso, E.F. Sri Maryani; Deoranto, Panji; Mahfudiana, Dwi
Jurnal Teknologi Pertanian Vol 8, No 1 (2007)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

The purposes of this research were to develop an  - R control chart of the filling process in a particular pasteurized milk industry in order to improve the performance of the process. Based on the data of the milk volume filled in the container, the  - R control chart of the filling process was developed. It was found that an average volume ( ) was 143.88 ml; and the respective values of UCL and LCL  were 147.74 ml and 140.52ml, with an average volume range (R) of 5.83 ml; UCLR = 12.30 ml; and LCLR = 0. The chart showed that the center line and limits of the X control exceeded the predetermined value of 140 ± 5 ml, with the average volume of 143.88 ml, which was above the set value of volume 140 ml.  The value of Cp was 0.66 (less than 1,00) and the Kane performance index, CPK = 0,15 which was equal to the CPU. It means that the operation of the filling process was under its capacity. Since the filling machine used was a semi automatic one, to reduce the excessive filling may be carried out either by upgrading operator or machinery performances.Key word:  control chart, filling process, pasteurized milk
Native and Debranched Rice Starch Modification Using Physical or Chemical Treatment to Increase the Level of Resistant Starch Wulan, Siti Narsito; Widyaningsih, Tri Dewanti; Kasseri, Dian
Jurnal Teknologi Pertanian Vol 8, No 1 (2007)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

Resistant starch, dietary fibres compound, is carbohydrate that escape from human digestion system, therefore it has potential health benefits. A study on resistance starch of the native and debranched starches, obtained from rice, which were further treated with physical or chemical treatment has been conducted. The extracted rice starch was first enzymatic debranched by means of bacterial pullulanase. The debranched starch was then treated further either by autoclaving, extrusion cooking or chemically cross-linking. The native starch was also undergone similar physical or chemical treatments.  The results showed that the treated debranched-starch contained a higher level of resistant starch than that of the native starch treated with the similar treatment. The cross linked debranched-starch was the best one and it contained 8.45% moisture, 3.19% ash, 85.44% starch and 3.67% resistant starch. The respective initial gelatinization temperature, gelatinization temperature and maximum viscosity of the modified starch were 79.3oC, 89.6oC and 1478 AU.Key word: resistant starch, enzymatic debranching, physical or chemical modification
Chemical Activation of Natural Zeolite for Purification of Fish Oil from By- Product of Fishmeal Processing Ahmadi, Kgs; Mushollaeni, Wahyu
Jurnal Teknologi Pertanian Vol 8, No 2 (2007)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

Omega-3 fatty acid has health benefits.  Indonesia has some species of fish that contain this kind of fatty acid such as lemuru.  However its utilization as -3 fatty acid source is still limited.  Fish oil from lemuru meal processing has poor quality because of its color and peroxide value, besides its free fatty acid content. Therefore purification process should be employed to improve its quality.This research was conducted to elucidate the performance of natural zeolite in purification of fish oil from lemuru meal processing. Acitivation of natural zeolite was employed to increase its adsorption capacity.  One  technique to activate natrural zeolite was chemical activation by strong acid (HF, H2SO4, dan HCl). Concentration level of activated zeolite in purification was also defined. The best result was natural zeolite activated by HCl and concentration level of 15%.  The characteristics of purified lemuru oil were as followed: absorbance at 430 nm of 0,24, free fatty acid content 4,12, ω-3 fatty acid content of 20,34%, and peroxide value of 93,6 meq/kg.Keywords: natural zeolite, purification, lemuru meal processing, fish oil
Native and Debranched Starch Modification Using Physico-Chemical Treatment to Increase Resistant Starch Content in Rice Wulan, Siti Narsito; Widyaningsih, Tri Dewanti; Ekasari, Dian
Jurnal Teknologi Pertanian Vol 8, No 2 (2007)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

Besides dietary fiber, resistant starch is carbohydrate that escape human digestion system, therefore it has potential health benefits.  A study on native and debranched starch from rice using physico-chemical treatment has been conducted. Physico chemical treatment used were autoclaving, extrusion and crosslinking.  The result showed that debranched starch which was treated with autoclaving, extrusion and crosslinking had higher resistant starch content than native starch treated with the same physico chemical treatment.  The best treatment with the highest resistant starch content was obtained from debranched starch treated with crosslinking.   The physicochemical properties of the product were as follows: moisture content of 8,45%, ash content of 3,19%, starch content of 85,44%, resistant starch content of 3,67%, initial gelatinization temperature of 79,3oC, gelatinization temperature of 89,6oC, and maximum viscosity of 1478 AU.Key word: resistant starch, debranching, autoclaving, extrusion, crosslinking
Determination of an Optimum Extraction Time and Its Production Cost of Powdered Extract of Guava (Psidii folium) Leaf Sukardi, Sukardi; Mulyarto, A. R.; Safera, W.
Jurnal Teknologi Pertanian Vol 8, No 2 (2007)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

A randomized block design experiment was performed to determine the optimum extraction time and its production cost for producing a extract powder of guava (Psidii folium) leaf. The extraction process was carried out for 5; 10; 15; 20; 25 and 30 minutes respectively. The extract was then dried and the parameters observed were the yield, the levels of tannin, moisture, pH and the production cost.    The results showed that the yield, the characteristics of the powdered extract, as well as the production cost, varied with the extraction time. Based on the regression technique, it was likely that  17.5 minutes was the optimum extraction time. The yield was 2.67 % at 4.42 % moisture and contained 0.3968 g per 5 g (7.936 %) tannin with the pH of 4.32. The production cost was IDR (Indonesian Dollar Rupiah) 875 per 5 g powdered extract.Key word : Extraction time, guava leaf, powdered extract
Cellulose Production Using Kombucha Culture From Wastewater of Tofu Industry (The Analysis Study on Sucrose and Ammonium Sulphate Additions and Its Production Cost) Nurika, Irnia; Hidayat, Nur; Anggraeni, Yaumadina
Jurnal Teknologi Pertanian Vol 8, No 2 (2007)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

The objective of this research was to assess  the  influence of  sucrose and ammonium sulphate additions to the waste water of tofu industry as a substrate for Kombucha culture on  the produced cellulose sheet (pellicle) and to analyze its production cost. The experiment  was run in triplicates employing the Completely randomized block design. Three respective levels of  sucrose (8%, 10% and 12%) and ammonium sulphate (0.3%, 0.4% and 0.5%) were added. The parameters observed were the yield, moisture and crude fiber contents, and the production coct was then determined based on the most promising process. It was shown that the sucrose and ammonium sulphate additions  significant affected the yield, moisture and crude fiber contents, as well as the thickness of the pellicle produced. The best treatment was obtained by the addition of 10% (b/v) sucrose and 0.4% (b/v), ammonium sulphate which  resulted in the yield of  6.89% with the following characteristics: the thickness of 2.70 mm, and the respective moisture and crude fiber contents of 82.21% and 4.62%.  The production cost to achieve the break even point was Rp. 244,174.63 a pack of 7 kg. To get a profit level of 10%, the selling price of the product should be Rp. 299,500.00/pack.Key word : cellulose sheet, Kombucha, waste water

Page 13 of 57 | Total Record : 570

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