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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.
Arjuna Subject : -
Articles 8 Documents
 1 
Search results for , issue "Vol 8, No 1 (2007)" : 8 Documents clear
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
Extraction and Characterization of Endogenous Polygalacturonase Enzyme in Cocoa Pulp Gandaputra, G. P.; Harijono, Harijono; Susanto, Tri; Kumalaningsih, Sri; Aulanni'am, Aulanni'am
Jurnal Teknologi Pertanian Vol 8, No 1 (2007)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

Endogenous polygalacturonase (PG) enzymes in cocoa pulp have not been studied yet. The research, aimed to extract and characterize endogenous PG enzymes in cocoa pulp, was carried in two steps: (i) extraction of endogenous PG enzyme and (ii) enzyme characterization i.e. enzyme activity assay and determination of enzymatic kinetics (Km and Vmax), molecular weight (MW) by electrophoresis, and determination of its optimum temperature and pH. The results showed that the characteristics of endogenous PG in cocoa pulp were as followed: the relative activity of 4,58± 0,06 Units/ml,  Vmax of 6,69 Units/ml, Km of 0,37 %, MW was 32,84 and 63,58 kDa, and the combination of temperature and pH optimum were 42,5oC and 4,6. Key words: endogenous polygalacturonase (PG), cocoa pulp
Effect of Curing Process on Composition of Indonesian Bay Leaf (Eugenia polyantha Wight.): Components’ Profile and Preference of Flavor Extracted by Simultaneous Distillation-Extraction Method Wartini, Ni Made; Harijono, Harijono; Susanto, Tri; Retnowati, Rurini; Yunianta, Yunianta
Jurnal Teknologi Pertanian Vol 8, No 1 (2007)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

Bay leaves are widely used as flavouring in Indonesian cuisine, either in the form of fresh ones or after naturally dried, known as curing process. The research was conducted to determine the profile of components of the Indonesian cured bay leaves and to determine the preference of its flavour extracted by simultaneous distillation-extraction method. A randomized block design experiment was performed examining three levels of curing time, namely 0, 2 and 4 days. The effects of curing on the change of weight, moisture content, colour, and components profile of the bay leaves were evaluated. The flavour components from all samples were isolated by simultaneous distillation-extraction method. The hedonic scale scoring was used to evaluate the preference of the flavour of the extract. It was found that the curing process substantially reduced the weight and moisture content, as well as the colour of the leaves. A total of 27, 33 and 23 compounds were resulted from flavour extract of 0, 2, 4 days cured bay leaves, respectively.  The flavour extracts from 0 and 2 days cured bay leaves showed no difference in the preference test.   Key words:  curing, flavour, bay leaf.
Design of Sprinkler Irrigation for Orchids Kurniati, Evi; Suharto, Bambang; Afrilia, Tunggal
Jurnal Teknologi Pertanian Vol 8, No 1 (2007)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

The export of orchids increased from about US$ 3 million in 1999 to US$ 4,1 million in 2002. An improvement in any aspects of its culture techniques is important to increase its productivity. One of the techniques need to develop is related to the irrigation system. The research was conducted to develop a sprinkle type irrigation system for Cattelya orchids of 6-7 years old, cultured in Batu, Malang. The system was then designed, constructed and tested.   It was found that, the daily water requirement of this particular orchid was 0.12 L. Based on the water requirement, the irrigation system was designed and constructed. At a design level, the measurements showed that the daily discharges of the sprinkle, lateral pipe and main pipe were 0.49 L, 4.88 L and 24.37 L respectively. The total head loss resulted from the sprinklers, lateral pipe, main pipe, 90 angles and joints was 2.46 x 10-4 m, at a total head of pump of 10.00024631 m. The results of the performance tests on the constructed system showed that the discharge levels were lower than that at the designed level. It was probably due to the pump efficiency which was recorded as low as 29.31%. It was found that at 25 Psi, the water sprayed diameter was 0.8 m, with the respective values of the uniformity coefficient, uniformity distribution, PELQ and AELQ were 88.76%, 57.87%, 10.53% and 8.53%. The total cost needed for the irrigation system was 4,197.22 rupiahs/m2.Key words: design, sprinkler irrigation, orchid

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