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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 8 Documents
 1 
Search results for , issue "Vol 9, No 3 (2008)" : 8 Documents clear
Monitoring System of Oxygen and Carbondioxide in Controlled Atmosphere Storage System Argo, Bambang Dwi; Lastriyanto, Anang; Astuti, Nuraini Puji
Jurnal Teknologi Pertanian Vol 9, No 3 (2008)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

One of the ways in pickling process of main food material of vegetables and fruits is storage. Principally, the control of metabolism during storage, such as respiration, transpiration, disease infection, is designed to lengthen shelf life of horticultural products.  The purpose of storage of fruits and vegetables is to lengthen product utilization, to control market demand, and to increases benefits. So far, the system of controlled atmosphere storage is still done manually either by observation of gas composition or changing gas inside the packaging. Therefore, it is needed to modify equipment for monitoring system and controlling gas automatically, so the changes of gas volume and composition in storage space of CAS can be detected. Equipment applied in this research was microcontroller AT89S51 and its arrangement system by using computer. It had an existence of communication between a microcontroller system and a personal computer through IC RS 232. At this research the oxygen concentration changed from 21% to 2% and the carbon dioxide concentration increased from 0.03% to 2.5% at temperature of 26oC. This condition was suitable for apple var. Rome Beauty storage.Keywords: oxygen, carbon dioxide, CAS, MKAT89S51, personal computer
The Effect of Chitosan on Lipid Profile of Sprague Dawley Rat Blood Serum Martati, Erryana; Lestari, Lily Arsanti
Jurnal Teknologi Pertanian Vol 9, No 3 (2008)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

Chitosan shares characteristic with dietary fiber which can interact with lipids and/or  cholesterol in the intestinal lumen, consequently, reduce their absorption.  The effect of chitosan concentration on the serum cholesterol levels (total cholesterol, HDL, LDL cholesterol and trigliceride) and digesta profile of Sprague Dawley rats were investigated. A two month old Sprague Dawley rats consisted of six groups with seven animals of each group were adapted for one week by giving standard diet (AIN-93). Then they were treated with hypercholesterol diet containing approximately 200 mg/kg cholesterol for one week.  At the end of this week, cholesterol level was measured. The parameter for hypercholesterolemic rats was the raising level of serum cholesterol as much as 130 mg/dl. The first three groups of rats were treated with standard diet (AIN-93) with 0%, 2.5%, and 5%  of chitosan.  The second three groups were treated with hypercholesterol diet with the same treatments as the first one. Blood was drawn from eyes (reorbital plexus) every week for analyzing cholesterol levels (total cholesterol, HDL, LDL cholesterol and triglicerides). At the end of the treatment, seven rats were killed after one day fasting then liver and caecum were collected for analyzing.Research showed that chitosan of 2.5% and 5% in the diet did not alter body and liver weight of the group with standard diet (AIN-93) treatment. Conversely, body wieght decreased and liver weight increased in the hypercholesterol diet treatments. Chitosan also increased digesta weight and cholesterol level either in standard or hypercholesterol diet treatments. Serum profiles showed that chitosan treatment of 2.5% or 5% decreased total cholesterol, LDL cholesterol and triglyceride but increased HDL cholesterol.Keyword: lipid profile, blood serum, chitosan, hypercholesterol
High-Tocopherol Fraction from Rice Bran (Oryza sativa) Prepared by Low-Temperature Solvent Crystallization Technique Cahyanine, Miradiah; Estiasih, Teti; Nisa, Fithri Choirun
Jurnal Teknologi Pertanian Vol 9, No 3 (2008)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

Rice bran is by product form rice milling. Rice bran has good nutrition value, such as rich of vitmamin E. Indonesia has a very great amount of rice bran but has not been explored yet. The aim of this research was to know  how influence of temperatur and crystallisation duration to tocopherol rich fraction characteristic, and to determine the effective temperature and duration of crystallization in tocopherol purification from rice bran, through solvent crystallization technique in low temperature. This research was conducted by Randomized Block Design with 2 factors. First factor was crystallization temperature (0 and 10°C) and second factors was duration of crystallization (24, 30 and 36 hours). Each treatment was repeated 3 times. The result was analyzed using analysis of variance and continued by LSD and DMRT.Tocopherol content increased from rice bran oil, unsaponifiable matters, and high tocopherol fraction.  Temperature of crystallization significantly affected antioxidant activity, free fatty acid content, and peroxide value.  Time of crystallization affected tocopherol concentration, antioxidant activity, and peroxide value.  The best treatment was obtained from temperature of crystallization of 0°C and crystallization time of 24 hours.   The characteristics of this fraction was tocopherol concentration of 17.84%, antioxidant activity of 38.42%, free fatty acid content of 2.28%, peroxide value of 6.45 meq/kg, and color value of 100.Keywords: tocopherol, rice bran, crystalization, solvent, unsaponifiable fraction
Tempeh Inoculum Application Test of Rhizopus oryzae with Rice and Cassava Flour as Substrate at Sanan Tempeh Industries – Kodya Malang Sukardi, Sukardi; Wignyanto, Wignyanto; Purwaningsih, Isti
Jurnal Teknologi Pertanian Vol 9, No 3 (2008)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

This research was designed to obtain high quality dried tempeh inoculum (powder) and to know the best level of inoculum for small medium industrial scale.  Also it was designed to know the preference of consumers.  Experimental design employed in this research was completely randomized design comprosed of one factor i.e. the level of R. oryzae concentration consisted of 0.9% w/w; 0.7% w/w; 0.5% w/w; 0.3% w/w; and 0.1% w/w.  The initial R. oryzae spore of the starter was 1,3x107 cfu/g.  The best treatment was determided by multiple atribute method.  The application test of the best inoculum was done at 3 tempeh small industries and the produced tempeh was analyzed by sensory test.The best level of R. oryzae pure culture addition was 0.5% based on substrate weight, and the total microbial of dried inoculum was 8.02 x 107 cfu/g (7.90 log cfu/g) with the percentage of viable mold after I month was 89,52%.  The total number of mold after mixing with rice flour was 3.04 x 107 cfu/g (6.893 log cfu/g), the percentage of viable mold was 90.92%, and the percentage of contaminating bacterium was 41.75%.  The end piece of cassava could be used as substrate for tempeh inoculum production from pure culture of R. oryzae and it had yield of 41.70% and moisture content of 6.57%.   The best addition of R. oryzae inoculum in producing tempeh was 0.15%, and the consumers preference of texture was 8,07 (like very much), the appearance was 7,67 (like), color  was 7.47 (like), the aroma was 7.47 (like), and taste was 8 (like very much).Keywords: tempeh inoculum, pure culture, dried inoculum, tempeh industries
The Study on Sorghum (Sorghum bicolor. L Moench) Soaking and Germination Time to Produce Low Tannin and Phytic Acid Flour Narsih, Narsih; Yunianta, Yunianta; Harijono, Harijono
Jurnal Teknologi Pertanian Vol 9, No 3 (2008)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

Flour sorghum has not been exploited widely for food product such as other cereal flour because of the content of phytic acid and tannin in the seed. The modification of flour processing could reduce tannin and phytic content which could increase the flour quality. Time of soaking and seed germination have an important role for the production of high quality flour. The  purpose of this research was to study the appropriate treatments of soaking time and  seed germination to reduce tannin and phytic acid content.This study was carried out using factorial randomized block design with two factors, which were soaking time (24, 48 and 72 hours) and germination time (12, 24 and 36 hours).  Data was analyzed by Anova and continued by Least Significant Difference  or Duncan Multiple Range Test.The result showed that the soaking time of 72 hours and the germination time of 36 hours had the lowest tannin and phytic acid content which were 0.75% and 3.10 mg/g respectively. The low tannin and phyitic acid flour was applied on muffin bread.The sensory test of muffin hedonic scale score showed that the panelist stated like for color and slihtly like for texture.Keywords: sorghum, soaking, germination, tannin, phytic acid
Pattern Interception of Coffee Plants in The Laboratory Scale Using the Rainfall Simulator with the Quite Heavy – Heavy Rain Intensity Naimah, Lilik Imron; Wirosoedarmo, Ruslan; Rahadi, J. Bambang
Jurnal Teknologi Pertanian Vol 9, No 3 (2008)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

Hydrology is the science of learning and the provision of movement under and upper water on the earth surface.  There are many events in the hydrological cycles such as infiltration, percolation, run off, evaporation, transpiration, and interception. The interception is the event where rainfall felt on the vegetation of land surface is retained for a moment before evaporation into the atmosphere.  Interception is influenced some factors which are plant species, plant age, canopy shape, canopy with, leaf position. Therefore the existence of the canopy can inhibit rainfall to fall   on the land surface.Research on the interception is still limited. Generally, the value of interception is small, but it highly influences the occurrence of erosion.  This research was conducted to determine the magnitude of interception by simulation model.  The modeling used rainfall simulator as a tool. The objectives of this research were to know the relationship between the amount of rainfall and interception on coffee plants and to know the interception feature pattern of coffee plants using rainfall simulator.  The research used 3 heights of the plants, 3 rain conditions, and 5 densities of the plants (50%, 60%, 70%, 80% and 90%). The data obtained was analyzed by statistical analysis.  It was aimed to determine the relationship between variables assessed. Interception pattern of coffee plants based on density increased as the plant density increased.  The plant density of 90% had the highest interception value for each plant height. The magnitude of interception of coffee plants based on rainfall conditions which were quite heavy (intensity of 66,294 mm/hour), heavy-1 (intensity of 93,116 mm/hour) and heavy-2 (intensity of 133,35 mm/hour), showed the interception increased as the intensity increased.  The interception and precipitation showed positive correlation and logarithmic relationship.Keywords: hydrology, interception, rainfall simulator, simulation
The Calibration and Performance Evaluation of Rainfall Simulator Rahadi, Bambang; Soemarno, Soemarno; Masrevaniah, Aniek; Priyono, Sugeng
Jurnal Teknologi Pertanian Vol 9, No 3 (2008)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

Rainfall simulator is important for studying hydrology and erosion in laboratory.  The most important parameter for studying the performance of rainfall simulator is rain intensity, drop size distribution, drop mass, drop impact velocity, and kinetic energy.  They are evaluated by uniformity coefficient (UC) and distribution uniformity (DU). This research was aimed to study the functional performance of rainfall simulator including determination of the correlation between pressure with rainfall parameters (rain intensity, drop size distribution, and kinetic energy) and rainfall simulator performance evaluation based on uniformity coefficient and distribution uniformity.  The data was analyzed by using linear regression and evaluated by uniformity coefficient and distribution uniformity.The result showed that pressure had linear relationship with rain intensity, diameter drop distribution, drop impact velocity, dropped mass, and kinetic energy.  The coefficient uniformity (CU) of the pressure 2.5 psi-6.5 psi  more than 80% and the distribution uniformity (DU) more than 70%. The rainfall simulator had better performance at the pressure of 2.5 psi than 6.5 psi.Keywords: rainfall, simulator, performance
Microbes Inactivation by Combination of Pulsed Electric Field and Heat Treatment on Coconut Water for Isotonic Drink Saparianti, Ella; Harijono, Harijono; Wulandari, Budi Dwi
Jurnal Teknologi Pertanian Vol 9, No 3 (2008)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

Pulsed electric field is one of non-thermal food preservation method. Pulsed electric field has more advantages than thermal preservation. It can inactivate microbe without reducing flavor, taste, and nutrition, compared to traditional thermal sterilization. Coconut water contains natural electrolytes. There are some recognized benefits of coconut water, one of them is as a natural isotonic drink. The aim of this research were to understand the effectiveness of microbe inactivation with pulsed electric field with or without heat treatment on coconut water, and to understand chemical changes of this process.  Experimental design used in this research was randomized block design with 2 factors. The first factor was pretreatment (heat treatment and without heat treatment) and the second factor was the magnitude of electric field which were 0.60; 0.75; 1.20, and 1.50 kV/cm). Pulsed electric field of 1.50 kV/cm without heat treatment reduced total microbes of 3 log cycles and total of E. coli of 2 log cycles. Heat treatment could reduce total microbes of 2 log cycles. Whereas pulsed electric field combined with heat treatment reduced total microbes of 5 log cycles and destroyed E. coli. Pulsed electric field with heat treatment was in microbial and E. coli inactivation than without heat treatment, but this treatment decreased sodium and potassium content of coconut water. Pulsed electric field with heat treatment produced more reducing sugar and decreased more vitamin C than without heat treatment.Key words: pulsed electric field, heat treatment, isotonic drink, coconut water

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