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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 6 Documents
 1 
Search results for , issue "Vol 14, No 2 (1994)" : 6 Documents clear
Penghampiran Teknologi dalam Pembangunan Irigasi Suprodjo Pusposutardjo
agriTECH Vol 14, No 2 (1994)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2223.237 KB) | DOI: 10.22146/agritech.19278

Abstract

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Simulasi Pemerkiraan Parameter Sifat Fisikawi Bahan Makanan dengan Metode Penjejak Parameter B. Rahardjo
agriTECH Vol 14, No 2 (1994)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2362.141 KB) | DOI: 10.22146/agritech.19279

Abstract

Simulation of the parameter tracking method was used to estimate the physical parameters of food material. The input-output relationships of the materials were based on known mathematical models. Three mathematical models of the food properties were studied: the Kelvin model of linear viscoetastic material, the power law of non Newtonain liquid, and the impact model of a non linear viscoelastic spherical object. The results indicated that the parameter tracking method can determine the parameters of the models correctly. However the speed of the estimation depends on the models. The estimation of the parameters of the linear model converged Faster than that of non linear models.
Pengukuran Kecepatan Aliran Bermuatan Sedimen di Saluran Irigasi Saiful Rochdyanto
agriTECH Vol 14, No 2 (1994)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2380.737 KB) | DOI: 10.22146/agritech.19280

Abstract

Study on the measurement of flow velocity in sediment-laden flow was carried out in Van Der Wig* irrigation Canal, Yogyakarta. Study was conducted in various of canal conditions and various of sediment concentration. Flow velocity was measured by using current meter and water sample was collected by using suspended sampler. Result of study shows that velocity distribution data can be suited by the power-law, although it does not seem to fit with equation that presented by Munson which is suitable with non-sediment laden flow in open channels. Due to the deviation on power-law graph, in order to find the average-measured-velocity which is match with the actual-velocity, the point of measurement should be 0,71 D (from the free water surface). The point of measurement at 0,6 J) such as already established by regulation will give an error about 14,35%.
Koefisien Laju Penurunan Debit Aliran Dasar Sebagai Indikator Perubahan Sistem Transfer Hujan-Aliran Suatu DAS : Studi Kasus DAS Naizin Perancis Sunarto Goenadi
agriTECH Vol 14, No 2 (1994)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2097.554 KB) | DOI: 10.22146/agritech.19282

Abstract

The transfer of rainfall-discharge in a watershed is one of an important role in hydrological cycles. The changes of the watershed physical conditions affect significantly to that bluffer. This study focused to describe the effect of agricultural land consolidation and different area of maize on coefficient of base now recession. The experimental of the Naizin, which has an area of 1193 hectares located in France was used for the study. The result showed that the land consolidation and different area of maize cultivation affect significantly to the coefficient of base flow recession.
Hubungan Keadaan Kimiawi dan Mikrobiologik Bandeng Asap Pada Penyimpanan Suhu Kamar dengan Sifat Organoleptiknya Suwedo Hadiwiyoto
agriTECH Vol 14, No 2 (1994)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1218.665 KB) | DOI: 10.22146/agritech.19283

Abstract

Perubahan kimiawi dan keadaan mikrobiologik bandeng asap telah diamati selama penyimpanan pada suhu kamar. Bandeng asap dibuat dengan cara pengasapan panas (suhu ± 70°C) selama 3 - 4 jam dengan bahan serbuk gergaji kayu jati. Pengamatan keadaan kimiawi meliputi kandungan ammonia, kerusakan lemak, dan keadaan asamnya. Diperoleh keterangan, pengasapan dapat menaikkan kandungan ammonia dan total asam, tetapi menurunkan nilai TBA-nya. Setelah bandeng asap disimpan pada suhu kamar, kandungan ammonia dan nilai TBA-nya meningkal terus masing-masing mencapai 40% dan 160% pada penyimpanan empat hari. Total asam mula-mula menurun kemudian meningkat selama penyimpanan. Pengasapan juga menurunkan jumlah bakteri lebih daripada 93%. tetapi pertumbuhan bakteri meningkat selama penyimpanan. Jamur dapat mulai tumbuh setelah penyimpanan dua hari, sedangkan pada hari ketiga penyimpanan bandeng asap, pertumbuhan jamur menjadi nyata terlihat. Penyimpanan dua hari hampir tidak merubah penerimaan (kesukaan) panelis terhadap bau dan kenampakan bandeng asap, pada saat kandungan ammonia dan nilai TBA-nya masing-masing baru mencapai 30 mg/kg dan 620 mg/kg. Bau dan kenampakan bandeng asap tidak lagi disukai panelis setelah penyimpanan berlangsung 4 hari, pada saat kandungan ammonia mencapai 39 mg/kg dan nilai TBA mencapai 680 mg/kg ikon asap.
Pengaruh Iradiasi Terhadap Enzim Buah Pisang (Musa paradisiaca) Aryanti Aryanti; Ermin Winarno; Nurhidayati Nurhidayati; R. Sinaga
agriTECH Vol 14, No 2 (1994)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1263.72 KB) | DOI: 10.22146/agritech.19284

Abstract

The purpose of this study was to investigate the effect of irradition on the activity of pectinesterase, peroxisidase, polyphenol oxidase enzymes and their isoenzymes respectively. Bananas were irradiated at the doses of 0; 0,15; 0,3 and 0,45 kGy.and stored at 22°C and RH 70 - 80%. The results showed that irradition at the dosis of 0,15; 0,3 and 0,45 kGy could reduce pectinesterase activity by 4.52; 16.96 and 18.57% respectively. The activity of peroxidase were reduce by irradiation at the doses of 0,3 and 0,45 kGy by 16.37 and 21.81% and polyphenoloxidase were 19.67 and 24,52% lower than the control. The intensity of irradiated samples were lower than those of control. Irradiation doses of 0,3 kGy could be used to prolong the shelf-life of bananas up to three weeks; the firmness, L, a and b values of this irradiation level were higher than those of the control, and those of the irradiated at the doses of 0.15 and 0.45 kGy up to two weeks.

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