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Jurnal Teknologi Pertanian
Published by Universitas Brawijaya
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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 415 Documents
Linear Programming Optimization of Nutrient Addition on Biogas Waste and Goat Compost as Granules Fertilizer Raw Materials Argo, Bambang Dwi; Lutfi, Musthofa; Suherman, Suherman
Jurnal Teknologi Pertanian Vol 13, No 1 (2012)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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The objective of this study was to determine the optimum values of nutrient (i.e. nitrogen, phosphorus, potassium) added from inorganic fertilizers (i.e. KNO3, SP-36, Urea) to some alternatives raw materials of organic fertilizer using linear programming. Some alternatives raw materials of organic fertilizer in this study were biogas waste (Formula I) and goat compost (Formula II). The content of total N, C-organic, organic matter content of P2O5, K2O and Cation exchangeable capacity (CEC) were analyzed as parameters. The results indicate that the formula II with goat compost as raw materials was the best formula which has the average nutrient element close to the national standard of organic fertilizers with 23.16% of C-organic, 2.20% of N, 2.19% of P2O5 and 0.69% of K2O. In addition, the production cost of organic fertilizer base on formula II was cheaper than other formula i.e. IDR 1.15/g. Keywords: organic fertilizer, optimization, linear programming
Competitive Adsorption among Phospholipids at Oil Globule Interface of Caseinate Stabilized Emulsion Estiasih, Teti
Jurnal Teknologi Pertanian Vol 13, No 1 (2012)
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Casein and phospholipids are natural compounds usually used concomitantly as emulsifier. This research was conducted to elucidate the adsorbed phospholipids composition that stabilized oil globule interface during fish oil emulsification by sodium caseinate and phospholipids. Emulsion was formed by homogenizing sodium caseinate solution (10% w/v) with various phospholipids concentration of 0, 0.5, 1.0, 1.5, 2.0, and 2.5% (w/v) at fish oil concentration of 20%. The results showed that the quantity of adsorbed phospholipids increased in line with increasing phospholipids concentration. Competitive adsorption occured among various phospholipids that indicated by compositional changes of adsorbed phospholipids at oil globule interface. Their preference to adsorb was influenced by their surface activities. Among various phospholipids, phosphatidylcholine had preference to adsorb due to its higher surface activity and quantity. Phosphatidylethanolamine had less preference to adsorb because of its lower surface activity. Meanwhile, phosphatidylinositol had less ability to compete due to its low quantity. The change of adsorbed layer in oil globule interface was caused by phospholipids-casein complexation and displacement of casein by phospholipids to occupy oil globule interface. Keywords: preference to adsorb, caseinate, phospholipids, emulsion, oil globule, interface, surface activity, competitive adsorption, displacement, adsorbed layer, complexation
Changes in Respiration, Composition and Sensory Characteristics of Rambutan Packed with Plastic Films During Storage at Low Temperature Widjanarko, Simon B.; Trisnawati, CH. Yayuk; Susanto, Tri
Jurnal Teknologi Pertanian Vol 1, No 3 (2000)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Rambutan were held in sealed propropylene, polyethylene film bags and unpacked at 10±1 oC and 90-95% RH for 12 days. Physico-chemical, sensory changes and COEvolved were observed after 2, 4, 6, 8, 10 and 12 days. Packing fruit in plastic bagsreduced declining quality by means of weigh loss, moisture content, reduction sugarscontent and vitamin C. Packed fruit showed low respiration rate, low browning rate andhigh retaining total phenol in rambutan skin. Treated fruit also indicated better attributesassociated with eating quality than control fruit. Polypropelene plastic bags showed thebest result in all changes quality occurring during storage at low temperature observed. Keyword: rambutan, pakced fruit, storage 
Maturity Indices and Harvesting Practice of Arumanis Mango Related to The Target Market Tridjaja, N. O.; Mahendra, M. S.
Jurnal Teknologi Pertanian Vol 1, No 3 (2000)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Mango as a climacteric fruit is frequently harvested when less than fully ripe.  This isoften necessary to obtain optimal eating quality at the time of consumption where marketsare a considerable distance from the place of harvest. In this study the age of fruit was calculated, based on the time of flowering.  Theorchard selected for the trials was located in northern part of Bali, Indonesia.  Thelaboratory analyses were carried out at Udayana University. The results showed that optimal maturity of Arumanis mango for best consumptionis when the fruit is harvested 13-14 weeks after flowering.  Fruit age has a closerelationship with total soluble solids (TSS), total acidity and pH content.  This studyfound thatArumanismango is best for consumption when the TSS content of the fruit isnot less than 16.8Brix, total acidity 0. 18%, pH 4.8, flesh colour rating 6-6.5, and tastescore 5.Keyword: mango, maturity
Determination of Thermal Conductivity of Ambon Banana (Musa Paradisiaca L.) in One Dimensional Heat Transfer Mechanism Argo, Bambang Dwi; Komar, Nur; Damayanti, Retno
Jurnal Teknologi Pertanian Vol 1, No 3 (2000)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

The knowledge of thermal conductivity (k) is very important to estimate the flux ofheat transfer on material. The thermal conductivity Ambon Banana fruit (Musaparadiciaca L.) has been exploited in our works and the results are important forconstructing a system of food manufacture process such as heating, cooling, drying etc. The aims of this experiment are; 1) to determine the thermal conductivity of Ambonbanana fruit, 2) to know an influence of temperature gradient on the thermal conductivity. The configuration of experiment are fixed and they are; 1) the heat transfer in onedimensional, 2) the initial and boundary condition in certain value, 3) materialconsidered homogeny, and 4) experiment in unsteady state condition  The thermal conductivity is calculated by the numerical method (Method of CrankNicholson). The Ambon banana fruit is milled to obtain the homogenize of size and physical characteristic material. The given temperature treatment is of 40°C and of 70°C. We obtain that the mean of thermal conductivity of Ambon banana fruit at temperature of 40°C is (0.525±0.031) W/m°C and of 70°C is (0.530±0.066) W/m°C. Wecan make a conclusion that the higher of gradient temperature, affect thermal diffusivity.Keywords : thermal conductivity, heat transfer, unsteady state, one dimensional.
Productivity Analysis of Rice Farming System in Riam Kanan Irrigated Area Banjar, South Kalimantan Mustaniroh, Siti Asmaul; Hartono, Slamet
Jurnal Teknologi Pertanian Vol 1, No 3 (2000)
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Irrigation of Riam Kanan is project financed by Japanese Government withpotential area 25,900 hectare, which covered sub area A,B,C,D and E. The purpose ofthe project was to fulfill the need of all plants according to planting pattern that wasschedule, technically through system and drainage. The research has purposed to recognize Riam Kanan irrigation establishment effecton frequency of plantation, productivity and income of rice farming system. To get data in this research use methods survey and observation, respondent orfarmer objects by random data shortinity. Research result showed that Rian Kananirrigation project can increase frequency of plantation, productivity and income of ricefarming system, although not optimally obtained. For all condition is enough to realizethat result of rice farming system irrigated area higher than unirrigated area.Key words: productivity analysis, Riam Kanan irrigation project
Relationships Amongst Irrigation Facilities, Farmer’s Participation and Organizational Climate to Farming Goals Kurniati, Evi; Rahadi, Bambang
Jurnal Teknologi Pertanian Vol 1, No 3 (2000)
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Abstract

The greatest governmental investments to farming were irrigation facilities. Those were important to developed and built Indonesian farming. To preserved the conditions,it needed caring from everyone especially their user. It means that farmer’s participation,and user organizations were the most important thing. The research was conducted in Molek irrigated zone, on Kepanjen, Malang regency.Used three independent variables i.e. irrigation facilities, farmer’s participation, anduser organizational climate, and one dependent variable that was farming goals, thenanalyzed by statistics included validity and reliability test, correlation and linearregression. The result showed that irrigation facilities (X1), farmer’s participation (X), and userorganizational climate (X) had a positive correlation (direct relationship) with thefarming goals (Y), followed equation Y = 0.455 + 0.3322 X31 + 0.2845 X.Keyword: irrigation, farmer’s participation, and  organizational climate
Technical and Financial Studies For Choosing the Right Method pf Coconut Milk Powder Production : Effect of Tween 80 and Soy Milk Concentration Laksono, S. P.; Kumalaningsih, Sri
Jurnal Teknologi Pertanian Vol 1, No 3 (2000)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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The Physico-cemical organoleptic and financial studies of coconut milk powderprocessed by Foam Mat Drying method were carried out. A randomized block designwith two factors namely Tween 80 (0%;  0,4%; and 1%) as the first factor and dry soybean milk concentrations (0%,  2%,  and 5%) a the second factor was used to run thisexperiment. A multiple atribute was applied to select the best treatment for furtherfinancial studies.  The results implied that the best combination treatment was the use of 0,4% Tween80 and 2% dried soy bean milk which produced a promising dried product havingmoisture content of  5,74%; FFA 0,54%; percentage solubility of 85,48%,  Pay  Back Period 3 years and 3 months,  NPV= Rp. 7.910.389; and  IRR = 67,08.Keyword: technical and financial studies, foam mat drying, and soy milk
The Effect of Both, Bed Filter Thickness and Kinds Trickling Filter Media on Various of Flowrates to Decrease of Tapioca Wastewater Lutfi, Musthofa
Jurnal Teknologi Pertanian Vol 1, No 3 (2000)
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Tapioca industry growth rapidly, so wastewater from its increase too.  The quantityof wastewater from tapioca industry is large and they have high BOD (Biological OxygenDemand) and high COD too (Chemical Oxygen Demand), so if they are untreated beforerelease to streams, include to high pollutant stage. Organic matter content on wastewater decreased by biological treatment,  one ofthem is trickling filter.  Trickling filter basically is an artificial channel, consist of roughand uncertain shape materials as a filter arranged in the channel.  Wastewater spray onit and flow in this channel trickle down through this filter has the form of thin layer abovesurface of filter media, which have contact with air.  Biological slime consist bacteria,protozoa and other microorganism living on surface of filter media, consume organicmatter of wastewater, so they are decrease.   The experiment was aimed at studying the effect of flowrates and filter bad thicknessof trickling filter process with river rock and plastic ball as filter media to efficiency BODdecrease of tapioca wastewater.  The experiment is conducted using randomized block design, employing two factorsi.e. a bed filter thickness (T) and a type of filter media (M).  The filters consist of threerespective levels; 1m, 1.5m, and 2m and the media employed are river stones and plasticballs, respectively.  The respective applied are 35 ml/min, 105 ml/min and 175 ml/min. The treatments are conducted in three replicates. The results showed that the use of 2 m bed filter of river stone at flowrate of 35ml/min reduced BOD level by 5263 ppm, which is equivalent to 75.18 % of its initial level. However, the use of 1 m bed filter of river stone at a flowrate of 175 ml/min resulted inthe lowest reduction of BOD level i.e. 2672 ppm.Keyword: trickling  filter, tapioca industry, and tapioca wastewater
The Influence of Wetted Surface of Super Green B Sponge on Temperature, Relative Humidity of Air and Power Efficiency of Blower at Evaporative Cooling System Hawa, La Choviya
Jurnal Teknologi Pertanian Vol 1, No 3 (2000)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Temperature and relative humidity of air were factors that influenced the evaporativerate of vegetables. The evaporative rate become higher at high temperature and lowrelative humidity.  This is caused by the high gas partial pressure difference between airof storage and vegetables. One method to slow down the metabolism activity of agricultural product was todecrease air temperature and to increase the relative humidity.  Humidifying the air canbe done by spraying water to the unsaturated air stream.  The sensible heat of air wasused to evaporate the water from liquid phase to gas phase, therefore result thetemperature of process became lower than before.  This process called evaporativecooling which its and the mechanism was heat transfer between air and water. The objectives of this research was utilizing evaporative process and knowing theinfluence of wetted surface on temperature, relative humidity and power blower efficiency. This study was performed using seven treatments at evaporative cooling system i.e. :no sponge,1 sponge layer, 2 sponge layer, 3 sponge layer, 1 sponge + water, 2 sponge +water, 3 sponge + water.  The parameters measured were dry bulb and wet bulbtemperatures process, air pressure of fan, temperature and relative humidity of air room,temperature of water from nozel.  To analize the parameters used thermodynamicanalizes without factorial design. The result showed that the thicker wetted surface applied with spraying water thelower temperature gained and the relative humidity become higher.  The greatest temperature decrease in 3 sponge + water treatment was 2.29°C, relative humidity89.09% and the lowest temperature decrease in 1 sponge+water treatment was 1.74°C and relative humidity was 85.27%.  The addition of sponge with spraying water wouldreduce the mass rate of air output from blower and decrease the power blower efficiency. The highest power efficiency in 1 sponge layer treatment was 62.93% and the lowestpower efficiency in 3 sponge + water treatment was 22.57%.Keyword : evaporative coolin, sponge, and humidifying

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