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Rachma Wikandari
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agritech@ugm.ac.id
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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 23, No 4 (2003)" : 6 Documents clear
Pendugaan kerusakan Akibat Impak pada Buah Apel dengan Metode Elemen Hingga Yuwana Yuwana
agriTECH Vol 23, No 4 (2003)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1791.601 KB) | DOI: 10.22146/agritech.13500

Abstract

Damage caused by impact in apple was predicted using finite element method Apple model was axi-•ymetric three dimensions consisted 779-1 tetrahylrical elemeitts with 1612 nodes representing an apple having 2.5 AlPa Yon; modulus, 0.145 Poisson ratio. 134.5 g mass and 164,4 cm . Impact was simulated by employing an acceleration of 135 g (g = 9,81m/s1) on the model. During simulation, damage was supposed to occur when the stress suffered by cell was greater than its strength. The strength of cell was adopted from the previous study which was 0.44 Zone q" damage resulted by impact was compared to the damage of the real apple caused by impact with the same energy level. The result of the simulation indicated that- the zone of damage in the apple matched to the damage of the real apple. This finding suggested that the finite element method could be employed to accurately predict the damage mechanism caused by impact on apple.
Model Respirasi BUah Salak Pondoh (Salacca Zallaca cv. Pondoh) yang Disimpan dalam Atmosfir Termodifikasi Berdasarkan Kinetika Enzim Rofandi Hartanto; Suprodjo Suprodjo; Budi Rahardjo; Tranggono Tranggono
agriTECH Vol 23, No 4 (2003)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1200.329 KB) | DOI: 10.22146/agritech.13501

Abstract

The salacca (Salacca zalacca cv. Pondoh) fruits were stored in various modified atmosphere conditions in the impermeable cuverles with the variation of oxygen concentration of 2, 4, 6 and 8%. carbon dioxide concentration of 1, 2. 3 and 4% and nitrogen concentration as the rest. The variation of temperature was 12, 20 and 24 C. Gases within each cuvette were replaced daily. The respiration rate of the fruit was mudded based on the enzyme kinetic theory. The result showed that the respiration model Mows the Michaelis-Menten enzyme kinetic, with CO2 as the uncompetitive inhibitor. The model was fit to predict the respiration rate of the fruit.
Cemaran Aflatoksin pada Produksi Jagung di Daerah Jawa Timur Endang Sri Rahayu; Sri Raharjo; Agustina A. Rahmanianna
agriTECH Vol 23, No 4 (2003)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3370.361 KB) | DOI: 10.22146/agritech.13502

Abstract

Penelitian ini ditujuan untuk mengindentifikasi tingkat cemaran aflatoksin pada produksi jagung di Propinsi Jawa Timur =la, dart lingkat petani, pengecer maupun pedagang sena mendapatkan data tentang praktek pasca-panen melalui kuesioner maul, 1111 peninjauan lapangan. Pemantauan dilakukan di 4 (empat) kabupaten penghasil jagung terbesar di Propinsi Jawa Thrum yaitu Malang, Tuban, Kediri dan Senep. Uji infeksi jamur menunjukkan bahwa hampir 100% biji yang diambil balk dart petani. pengumpul maupun pedagang di empat kabupaten terinfeksi oleh jaunt)• bermiselia putih dan hitam (tidak dilakukan identifikasi lanjut), Aspergillus dan Penicillium. Kadar air jagung yang diuji berkisar antara 12.60% - 20.84%. Hal ini merupakan indikator bahwa proses pasca panen belum berlangsung dengan baik. Data uji infeksi jamur aflatoksigenik menggunakan media AFPA menunjukkan bahwa sampel dengan cemaran aflatoksin tinggi (>100 ppb), rata-rata terinfeksi dengan jamur aflatoksigenik >50 %. Hasil uji aflatoksin menunjukkan bahwa dart 115 sampel yang diambil dart petani, pengumpul dan pedagang. 27 sampel (23%) tidak terdeteksi aflatoksin, sedang 48 sampel (42%) dengan cemaran aflatoksin < 20 ppb, 26 sampel (23%) dengan cemaran 20 - 100 ppb, dan 14 sampel (12%) dengan cemaran > 100 ppb. Dart hash uji diperoleh bahwa 6 sampel memiliki cemaran aflatoksin > 300 ppb, dengan cemaran tertinggi adalah sekitar 350 ppb. Secara urnum dapat disimpulkan bahwa praktek produksi jagung yang kurang balk dapat memberi peluang terhadap tingginya cemaran aflatoksin. Rekomendasi cara bercocok tanam yang tepat, pengeringan hingga kadar air 13% yang tidak boleti ditunda, penyimpanan pada ruang yang. kering dan bersih perlu disampaikan untuk petani, pengecer dan pedagang, maupun penterintah. Demikian pula insentif bagi petani, pengumpul dan pedagang yang mampu mempertahankan kebersihan bpi dart infeksi jamur Aspergillus flavus dan cemaran aflatoksin perlu ditingkatkan.
Evaluasi Karkas dan Rumah Potong Ayam Lokal di Beberapa Kabupaten di Daerah Istimewa Yogyakarta dan Jawa Tengah Wahyu Supartono; Sri Raharjo; Sofyan Iskandar
agriTECH Vol 23, No 4 (2003)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1876.379 KB) | DOI: 10.22146/agritech.13503

Abstract

Local chickens are one of national assets which need serious consideration, because they have some advantages than imported ones. These local chicken are still used as raw material for some traditional foods or ceremonies. But the quality of their carcasses was still low, so that it was needed to observe them in the practices (at the slaughtering houses and the market). The observations were conducted in some regions; Surakarta and Sukoharjo (Middle Java), Yogyakarta city, Sleman and Bantu! (Yogyakarta Special Province). This research was focussed on chemical, physical and microbiological determination on local chicken carcasses, which were sold in the market and evaluastion on slaughtering houses in the five research locations. The results depicted, the local chicken carcasess had higher protein and calorie content, lower fat content than imported ones. Based on sensory evaluation, these chicken carcasses showed good physical appearance. The results on texture and colour test depicted, there were no significant differences among the. But the microbiological test poniled out, that all samples were containinted by Escherichia coil, Staphylococcus sp and Salmonella sp. The field observation on the slaughtering houses showed, that all houses did not implement the principles of equipment lay-out, processing flow, good sanitation and waste handling and hygienic material handling.
Analisa Kualitas Layanan pada Industri Jasa Boga Rina Inderayani; Wahyu Supartono; Didik Purwadi
agriTECH Vol 23, No 4 (2003)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2871.352 KB) | DOI: 10.22146/agritech.13504

Abstract

The growth of income, knowledge, jobs, and work places supported the existence of the food service industry to fulfill the society's need To increase the consumer's satisfaction, it was needed to measure the service quality. The service quality was measured based on several variables: tangibles, responsiveness, reliability, assurance, and empathy, which ordered by SERVQUAL instruments. The research was conducted by using questionnaire which was spread out to the consumers. The research methodology was purposive random sampling. The data were analyzed by product moment correlation test and Alpha technique for reliability test. The assumption for the double regression model had to fulfill following criteria's: no multicolinearity no autocorrelation, and heteroscedasticity which could be ignored. The results showed, that consumer's acceptance level for service quality was high, which could be ranked as follow: reliability (highest), assurance, tangibles, responsiveness, and empathy (lowest). Double regression model for the quality service was : Y = 1.377 + 3.99x10-2X17.278x104X2– 4.673x10-2X3 + 0.118X, + 2.381x10'2X3, which meant variable assurance (X4) gave the highest contribution to the consumer's satisfaction
Model Matematics Salinitas Air di Muara Sungai untuk Pengairan Tambak Udang Windu Andri Sewoko; Saiful Rochdyanto; Putu Sudira
agriTECH Vol 23, No 4 (2003)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1443.74 KB) | DOI: 10.22146/agritech.13505

Abstract

The salacca (Salacca zalacca cv. Pondoh) fruits were stored in various modified atmosphere conditions in the impermeable cuverles with the variation of oxygen concentration of 2, 4, 6 and 8%. carbon dioxide concentration of 1, 2. 3 and 4% and nitrogen concentration as the rest. The variation of temperature was 12, 20 and 24 C. Gases within each cuvette were replaced daily. The respiration rate of the fruit was mudded based on the enzyme kinetic theory. The result showed that the respiration model Mows the Michaelis-Menten enzyme kinetic, with CO2 as the uncompetitive inhibitor. The model was fit to predict the respiration rate of the fruit.

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