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agriTECH

agritech
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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 1,392 Documents

57 58 59 60 61

Pengaruh Cara Ekstraksi dari Daun Janggelan (Mesona palustris BL.) dengan Perebusan dan Pengempaan terhadap Sifat Gel Bangun P. Nusantoro; Haryadi Haryadi
agriTECH Vol 23, No 1 (2003)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

A study on the effect of extraction methods on fanggelan leaf by boiling and pressing has been conducted. langgelan leaf was extracted for gel forming component by: boiling, pressing and combination of boiling and pressing. A 100 ml filtrate obtained front each extraction method was Mixed with 3 g suspension of tapioca and boiled with constant agitation. The mixture was then allowed to cool to room temperature and form a cincau gel. The gel was characterized for breaking strength and syneresis in addition to the yield that was determined for each extraction method. The extraction method with the highest yield was continued to optimize using respond surface methodology (RSM) for the best condition. The results indicated that the yield of extraction methods were 6,06% for pressing; 15,29% for boiling; 18,96% for boiling and pressing; and 22,13 % for pressing and boiling. The best condition for pressing and boiling extraction method was 275,4 kg/crn2 (pressure) for 3,2 minutes (time) which resulted gel 33,98 N (breaking strength).

Hubungan antara Ketuaan Durian CV Sunan dengan Sifat Fisiknya Bambang Haryanto; S Royaningsih
agriTECH Vol 23, No 1 (2003)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

The objective of this research is to determine relationship between durian maturity of Sunan cultivar and its physical properties. Twelve mature Sunan durians of 100 Â± 3 days after fullbloom and 12 immature durians of 70 Â± 3 days after fullbloom were used to bedetermined their specific gravity and physical properties. Specific gravity was measured by water displacement and physical properties was visualy identified. After the measurement of specific gravity, all durians were opened (0 measure firmness and total soluble solid (TSS). Durians pulp firmness were measured using Rheometer CD-300 DX (kg unit) while total soluble solid of durians pulp using a digital refractometer Atago PR-201 (% brixs). The result indicated that Sunan durians with oval shape, weight 1,53 1-0,45 kg, diameter 16.0 1-3,0 cm, length 19,0 Â±4,0 cm and can be cracked or opened. The specific gravity immature durian was 0,99 Â±0,08 gicrn'' and mature durian was 0,89 0,024 g/cm3. The relationship between specific gravity versus firmness of durian pulp, and specific gravity versus total soluble solid are significant as indicated by R2 = 0,89 and R2 = 0,88 respectively. The firmness of immature durian pulp is bigger than 3 kg and the total soluble solid is less than JO % brit

Sifat Hipoglisemik dan Hipolipdemik Kacang Kapri (Pisum sativum LINN) dan Kedelai (Glicine max MERR) pada Tikus Sprague Dawley Diabetik Induksi Alliksan Yustinus Marsono
agriTECH Vol 22, No 4 (2002)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Hypoglycemic and hypolidemic properties of Edible podded peas (Pisium sativum LINN) and Soy bean (Glycine max MERR) were evaluated in alloxan-induced diabetic rats. The objectives of this research were to investigate the effects of these legumes on serum glucose, total cholesterol and triacyl glycerol in alloxan-induced diabetic rats. Thirty male Sprague-Dawley (SD) rats (250-300 g) were provided and divided into three groups of ten rats. They were diabetic induced by twice intramuscular injection of alloxan (80 mg/Kg of body weight), then fed with three different diets i.e. Standard (ST), (2) Edible Podded peas (EP) and Soybean (SB) for 28 days. The legumes provided 20 % calorie of total duet calorie. Concentration of serum glucose, total cholesterol and tracyl glycerol were measured before injection and diet intervention (0 day and day 17th) and were monitored in the middle and at the end of diet intervention (day 31st and 45th). It was found that alloxan injection increased serum glucose concentration from 63.5 mg/dL to 281.4 mg/dL, total cholesterol and triacyl glycerol concentration increased from 90.7 mg/dL to 136.6 mg/dL and from 108 mg/dL to 147.5 mg/dL, respectively. In 28 days of diet intervention, EP and SB diets decreased the serum glucose concentration by 145.5 mg/dL (67%) and 142.1 mg/dL (65%), respectively, compared to 125.3 mg/dL (57%) in the ST diet. Total cholesterol decreased by 31% and 27% for EP and SB groups. respectively but only 17% for ST rats. Intervention of the diets also decreased concentration of triacyl glycerol by 9% and 5% for EP and SB diets, respectivelym but increased by 6% for standard (ST) diet.

Pendayagunaan Irigasi Airtanah Menunjang Budidaya Tanaman Secara Produktif pada Lahan Kering Muhammad Aqil; R.H. Anasiru; I.U. Firmansyah; Riyadi Riyadi; Sigit S. Arief
agriTECH Vol 22, No 4 (2002)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

The utilization of shallow groundwater well to support cropping pattern in dry land area should be directed to increase land and water productivities through proper irrigation management and effective operation of groundwater irrigation pump. By the concept that a certain plant needs a certain amount of transpired water through it's leaves to produce 1 kg dry product during it's production cycle, an attempt is done to determine technical and economic aspects of the groundwater irrigation system to utilize water and energy efficiently by improving the conjunctive use of rainfall and groundwater irrigation in dry land area. A set of centrifugal pump (ɸ 2") was used to lift water from the shallow groundwater well at total head of 22 m (Suction head = 12 m and delivery head = 10 m) and was used to irrigate maize, peanut and onion crops. The result obtained indicateds that the introduced technology is suitable to be applied at farm level. In order to reduce operational cost of pump, simulation was done to determine the most appropriate planting achedule using computer simulation model. By taking planting schedule back approximately 2 weeks reducing annual irrigation requirement of 500 to 600 m3/ha and reduce annual operation pump of 66.5 hour/ha/year. Advanced analysis using economic feasibility analysis indicates technology introduced suitable to applied with B/C ratio = 1.25 (maize), 1,83 (peanut) and 2,36 (onion).

Pengaruh Metode Pengeringan terhadap Kerusakan B-Karoten Mi Ubikayu yang Diperkaya Tepung Labu Kuning Ruslina Azhariati; Sri Anggrahini; Zuheid Noor
agriTECH Vol 22, No 4 (2002)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Pumpkin flour has high β-carotene, therefore, can be added to the noodle to alleviate vitamin A deficiency. Deterioration of β-carotene may take place during drying, proper control of the process to minimize the deterioration is necessary. The objective of the research was to study the β-carotene deterioration during drying process of the noodle and the physico-chemical properties of the cassava noodle that was enriched by pumpkin flour. The enrichment of the cassava flour was made by adding pumpkin flour various proportions 0, 5, 10 and 15 %. Noodle was sun dried for 8 hours, in cabinet dryer at 60ºC for 3 hours and in a two step cabinet dryer (60ºC for 2 hours followed by drying at 55ºC for 2 hours. The result showed that sun drying cause the greatest deterioration of β-carotene (46.24%). However, enrichment of pumpkin flour can improved the color, protein and β-carotene content of the noodle.

Perancangan Alat Pembentuk Lembaran Mie Basah yang Ergonomis dengan Pendekatan Rekayasa Nilai Diah Kusumawardhani; Guntarti Tatik Mulyati; Wahyu Purwanto
agriTECH Vol 22, No 4 (2002)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

To operate machines during the producing wet-noodle sheets processes involve both crews' hands and physical activities. The constructed structures for such machines which are not suitable for the operators's physical anthropometry may ultimately affect the operators' performances. Accordingly, declining in production quantities and qualities are unsurprising. Three stages are involved in designing and construction of such machines based on the above approaches. Namely identifying a set of operators' associated needs (which are gathered through questionaires), secondly is developing the ergonomics machine concept through FAST diagram and the last stage is analyzing the machines' overall expected value and performances. These design stages are performed on the main machine structure, the mixed blend basin, the milled paste container and on the handle grip to rotate the milling device. Studies indicated that machines constructed through these methods produced increamental of performance by 2.56% and value by 3.72 % respectively.

Desain Sistem Kontrol Umpan Balik pada Lintasan Traktor Tanpa Operator Lilik Sutiarso; T. Takigawa
agriTECH Vol 22, No 4 (2002)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

In the terms of precision farming system, this research was carried out in order to develop a trajectory path control method for the autonomous tractor when approaching a target. Firstly, open loop control was considered to design a trajectory control algorithm directly, definitely and simply structure. A proposed trajectory control algorithm called parallel parking theory was developed as non-linear state equation within non-holonomic constraint. To stabilize non-linear controlled, the algorithm was derived using the state feedback linerization technique. The vehicle posture can be expressed into position, direction angle and steering angle. In a front-wheel steering vehicle, two controlling inputs, running speed and steering vehicle, two controlling inputs, running speed and steering angle. Due to the running speed is difficult to control accurately, thus only the steering angle was controlled. In order to achieve the research objective, research work was carried out to compare the performance developed control algorithm between feedback and open-loop control system. A twenty-nine Ps computer-controlled tractor with four-wheel steering and four-wheel drive was used in this research ecperiment. For local based positioning method, fan beam laser sensor,fiber optic gyro sensor and incremental type rotary encoder were installed properly on the vehicle. The experimental results showed that after modifying of the developed algorithm into a feedback control form by correcting vehicle direction angle and lateral moving distance had improved its accuracy varied up to about 95%.

Optimasi Proses Pembuatan Tepung Asap Purnama Darmadji
agriTECH Vol 22, No 4 (2002)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Experiments were performed to optimize the process of smoke powder production using liquid smoke of coconut shell as raw material and rice powder as a model system for filler of smoke posder. The liquid smoke was produced by pyrolization method and the purification of the liquid smoke was done by redistillation method. The redistilled liquid smoke was diluted with varied water and mixed with some ratio of rice powder. The sensories of smoke powder was evaluated for ador, taste and overall, and data were optimized using Response Surface Methodology.The result of optimization process on the production of smoke powder indicated that the optimum temperature for redistillation process were 160ºC, the ratio of redistilled liquid smoke and rice powser was 2.5 ml/ 50 gram, and the concentration of the liquid smoke was 15.1%. The confirmation of the optimization value indicated that smoke powder was acceptable for consumer.

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

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

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.

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Contact Name
Fiametta Ayu Purwandari

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fiametta@ugm.ac.id

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+6285712601130

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agritech@ugm.ac.id

Editorial Address
Faculty of Agricultural Technology, Universitas Gadjah Mada, Jl. Flora No. 1, Bulaksumur, Yogyakarta 55281, Indonesia

Location
Kab. sleman,

Daerah istimewa yogyakarta

INDONESIA

Abstract

Abstract

Abstract

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Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Fiametta Ayu Purwandari

Contact Email fiametta@ugm.ac.id

Phone +6285712601130

Journal Mail Official agritech@ugm.ac.id

Editorial Address Faculty of Agricultural Technology, Universitas Gadjah Mada, Jl. Flora No. 1, Bulaksumur, Yogyakarta 55281, Indonesia

Location Kab. sleman, Daerah istimewa yogyakarta INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Fiametta Ayu Purwandari

Contact Email
fiametta@ugm.ac.id

Phone
+6285712601130

Journal Mail Official
agritech@ugm.ac.id

Editorial Address
Faculty of Agricultural Technology, Universitas Gadjah Mada, Jl. Flora No. 1, Bulaksumur, Yogyakarta 55281, Indonesia

Location
Kab. sleman,

Daerah istimewa yogyakarta

INDONESIA