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Rachma Wikandari
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Faculty of Agricultural Technology, Universitas Gadjah Mada, Jl. Flora No. 1, Bulaksumur, Yogyakarta 55281, Indonesia
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agriTECH
Published by Universitas Gadjah Mada
ISSN : 02160455     EISSN : 25273825     DOI : 10.22146/agritech
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Agritech with registered number ISSN 0216-0455 (print) and ISSN 2527-3825 (online) is a scientific journal that publishes the results of research in the field of food and agricultural product technology, agricultural and bio-system engineering, and agroindustrial technology. This journal is published by Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta in colaboration with Indonesian Association of Food Technologies (PATPI).
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 7 Documents
 1 
Search results for , issue "Vol 22, No 3 (2002)" : 7 Documents clear
Pengendalian Pencoklatan Produk Hasil Restrukturisasi Bubur Sri Raharjo; Suparmo Suparmo; Wahyu Supartono; Zaki Utama
agriTECH Vol 22, No 3 (2002)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1075.426 KB) | DOI: 10.22146/agritech.13539

Abstract

Upon peeling and slicing fresh fruits are easily discolored due to enzymatic reaction in the presence of oxygen. Restructured fruit also suffer the discoloration during aerobic storage either at room temperature or under refrigeration. The objective of this study was to find alternatives for preventing or retarding the discoloration rate of calcium-alginate restructured fruits during aerobic refrigerated storage using anti browning additives. Four different fruits including avocado, mango, jack fruit, and soursop were restructured using sodium alginate (1% w/w) and calcium lactate (1% w/w). The additives tested were citric acid 0.5% (w/w), ascorbic acid 0.05% (w/w), sodium disulfite 0.01% (w/w), N-acetyl-cysteine 0.05% (w/w), and combination of citric acid 0.05% (w/w) and N-acetyl-cysteine 0.05% (w/w). Addition of anti browning additives at the specified concentration was effective in delaying the discoloration of restructured fruits during aerobic storage at 4ºC for up to 6 days. Among the additives tested the use of combination of citric acid 0.05% (w/w) and N-acetyl-cysteine 0.05% (w/w) was the most effective in retarding the discoloration across the fruits. Restructured soursop, in particular, was not undergoing significant sidcoloration for 11 days of refrigerated storage.
Pengaruh Suhu Penyimpanan terhadap Kadar Gula pada Berbagai Bagian Umbi Bawang Bombay Suharwadji Sentana
agriTECH Vol 22, No 3 (2002)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (712.508 KB) | DOI: 10.22146/agritech.13540

Abstract

Onion is usually stored at either low (± 0ºC) or high (± 30ºC) temperature at 60%-75% relative humidities. Storage at high temperatures, however, results in loss of pyruvic acid and ascorbic acid, while low temperature storage, makes onion tends to develop brown colour brown colour during dehydration. This experiment was designed to find out the effect of storage temperature on the change of sugar levels of various parts of onion bulbs. Southport White Globe onions were stored at 0ºC and 30ºC at 60% relative humidity for 20 weeks; fructose, glucose, and sucrose contents of top, middle, and bottom part of onion bulbs were monthly investigated by Gorin method. The results show that fructose, glucose, and sucrose contents at the top, middle, and bottol bulb parts during storage had the same pattern of change, they increased at the beginning and then decreased at the enf of storage. At the week 12, sucrose levels in all different bulb parts stored at 0ºC increased sharply compared to those stored at 30ºC and then declined towards the end of storage.
Pengkayaan Protein Mie Instant dengan Tepung Tahu Yustinus Marsono; W. Pandhu Astana
agriTECH Vol 22, No 3 (2002)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1395.997 KB) | DOI: 10.22146/agritech.13541

Abstract

A study on fortification of tofu flour in instant noodle has been conducted. The objective of this study is to determine the effect of tofu flour addition on chemical, nutritional and physical properties as well as panelist acceptance of the instant noodles. Four level of tofu flour fortification were evaluated, i.e. 10%, 12%, 14% and 16% wheat flour by weight. It is found that fortification of 16% tofu flour increased protein content instant noodles to 18% (from 9%) but decreased the in vitro protein digestibility from 58.7% to 46.8%. The energy content increased from 451 Kcal to 461 Kcal per 100 g of instant noodles. Fat content increased by 1.6% but carbohydrates decreased by 10.6%. Elasticity and deformation tend to decrease with increasing addition of tofu flour, but no significant effect is shown on the ectensibility of instant noodles. Rehydration capacity decreased by 5.5% and cooking loss increased to 3.25% on the noodle added with 16% tofu compared to 1.96% in the control noodle. Expansion of noodles are increased with the addition of tofu flour but are similar for the difference level of tofu flour added. Among the level of tofu flour added, addition of 12% resulted in the most preferable noodle.
Penerapan Analisis Konjoin untuk Mengukur Preferensi Konsumen Minyak Goreng Marina Herawati; Guntarti Tatik Mulyati; Suharno Suharno
agriTECH Vol 22, No 3 (2002)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1825.552 KB) | DOI: 10.22146/agritech.13559

Abstract

Many similar products are offerred by some companies that give consumer's free of choice. Each company has the opprotunity to meet her consumer's need. First of all, company has to understand what product's attributes and the combination of product's attributes. Conjoint analysis can produces the combination which are important in marketing activities. The method of conjoint analysis which is used in this research can produces sttribute combination that is effecting consumer's decision making when they want to buy a product. Result shows the combination of product attributes, such as price, lighteness, colour, flavour and taste, and easiness to acquire, most prefered price of palm oil was under Rp. 5000 per litre, light, yellow to white with weight value of 12.5% and average combination utility value is 2.2632.
An Information Support System for Indentifying Farming System Part II : A Case Study of Sleman Regency, Yogyakarta Province Lilik Sutiarso
agriTECH Vol 22, No 3 (2002)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2271.463 KB) | DOI: 10.22146/agritech.13560

Abstract

The second part of the study is to validate the developed information system in a selected farming area. For the primary data, a farm survey is conducted in Sleman Regency, Yogyakarta Province. The sixty (60) household farms in 6 (six) districts are investigated which were grouped into animal-based and tractor-based farms. Based on the farms survey, the results described that the total annual water surplus in the study area is 792 mm that reached from November to April and water deficit is 355 mm from May to October. There is also surplus situation of number of animal-drawn and local equipment for land preparation in each district, but defieciency in number of power tiller and it's matching tillage equipment. The sensitivity analysis indicated those yield and crop proce are the most significant factor in determining the net return of the crop production system.
Simulasi Numerik Gerakan Lengas Tak Jenuh dalam Tanah pada Sistem Irigasi Tetes Muhammad Aqil; Sigit Supadmo; Budi Rahardjo
agriTECH Vol 22, No 3 (2002)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1174.287 KB) | DOI: 10.22146/agritech.13561

Abstract

The soil of coastal plain is characterized by sandy soil texture, salinity problem, low water capacity, high oercolation rate and high soil temperature during day time. Due to those constraints, therefore much water is needed to be favorable to plant growth. Objective of the research is dealing with the application of numberical method to simulate heat and mass flow of water which is affected by soil moisture availability. A core of soil sample with size 50 cm x 50 cm x50 cm is used as a physical model. The research has been schedule from 1997 to 1998. Under high initial moisture content the simulation shows that there is similarity between predicted and observed value of soil moisture content with the correlation value more that 90% (t-test value 95%). However, the simulation is under estimate for low initial moisture content and high temperature. For the model applications, the factor's which influence on moisture movement in the soil was collected and rearranged in exponential equation: θv =  103,469. Qirr 0.015. T 0.061. t 0.235. x -0.161. z -2.842. From the model found that to keep soil moisture content in favorable condition (θv = 0,1 cm3/cm3), the discharge design of drip irrigation needed was 3.2 cm3/sec with 2 hours duration of irrigation. The discharge designed based on water needed for evaporation and heat flushing so that moisture in the root zone was maintained.
Penerapan Analisis Sistem dalam Konservasi Tanah dan Air Darmadi Darmadji
agriTECH Vol 22, No 3 (2002)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1653.416 KB) | DOI: 10.22146/agritech.13562

Abstract

Study on soil and water conservation engineering can be approached easily by applying analysis system approach. This application will lead to the understanding that problems emerge in the system are strongly influenced by several factors, both dependent factors such as human factor, vegetative etc. and free factors such as climate. So, it is also understood that applying several disicpline of science can also approach problems solving in soil and water conservation in the certain area. Analysis system also help management process in implementing soil and water conservation activities in terms of solid and better managements works started from planning, implementation and the last monitoring and evaluation stage. Considering to all of these than it is suggested that system approached and system analysis should be introduced to students who study soil and water conservation courses in the higher education.

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