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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 5 Documents
 1 
Search results for , issue "Vol 17, No 4 (1997)" : 5 Documents clear
Penentuan Transmisivitas dan Porositas Efektif Untuk Mengkaji Proses Gerakan Airtanah Pada Lahan Heterogen Mahmud Achmad; Sigit Supadmo Arif
agriTECH Vol 17, No 4 (1997)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (955.072 KB) | DOI: 10.22146/agritech.19338

Abstract

The main purpose of this research is to determine properties of non-homogeneous ill-drained area which are reflected by transmissivity and effective porosity. The flow of water was analyzed using Darcy law and Boussinesq equations which were developed based on analogy theory of heat conduction to 2-Dimension (pseudo 3-D) of transient water flow. Based on the formula, transmissivity and effective porosity have been determined through mathematical model. The model needs daily deep water table as the main data. The model was tested in PG Jatitujuh Cirebon. The transmissivity and effective porosity information were very useful to solving drainage problems in the ill-drained area. Result of iteration method indicated that the land have 11 and S are 0,070 - 0,698 rnlm and 0,10 - 91,0 m2/day respectively. A R-square test was used to compare deep water table between observation data and output model each of bore hole, and was found average R-square is 0,8519 and standard of error is 0,0981.
Pengukuran Volume Benda Padat Berbagai Bentuk dengan Berdasarkan Volume Desakan Pada Bahan Curah B. Rahardjo; B. Suratmo; R. Kushendrati
agriTECH Vol 17, No 4 (1997)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1298.225 KB) | DOI: 10.22146/agritech.19339

Abstract

Some of the standard methods to measure the solid volume are based on fluid displacement. However, most of agricultural products are absorbable to water and certain fluids. Therefore the use of fluids to determine the volume of agricultural products can cause error. Where as bulk materials on certain condition behave and flow such as fluids but are not absorbable to products. Accordingly the objectives of the research were to evaluate the accuracy of volume measurement of solid particles with several shapes using bulk materials and to determine the measurement error and its relation to the pertinent parameters. The volume determined using bulk materials were compared with that measured using standard methods. The errors of the measurements were related to the pertinent parameters such as granular size and solid particle size. Samples used were spheres, cylinders, cubes, prisms and any shapes of solid particles made from wood, glass, bronzes or stone with any shapes. The bulk material was sand found on rivers around the city of Yogyakarta. The results indicate that the particle volume can be determined using bulk materials. However, volume measured using bulk materials was higher than that determined using standard methods. The volume errors increases as the granular size increases and as the solid particle size decreases. The error can be related to the granular particle size ratio quite well. The corrected volume with the estimed error was closely similar to the volume determined using standard methods. Bulk materials consisting of small size, smooth surface and sphere like shape granules are likely ideal medium for solid volume measurements.
Penentuan Koefisien Perpindahan Panas Permukaan Bola Berdasarkan Pendekatan Analitik Perpindahan Panas Tak Tunak B. Rahardjo; Suhargo Suhargo; H. Tambunan
agriTECH Vol 17, No 4 (1997)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1350.073 KB) | DOI: 10.22146/agritech.19340

Abstract

The standard method to determine the coefficient of surface heat transfer on spheres is based on the lumped capacitance method using spherical particles with Biot number less than 0,1. However, most agricultural products with spherical shapes have Blot number greater than 0,1. Several analytical approaches are available to determine the temperature distribution within the spheres with higher Biot number. Accordingly, the objectives of this research were to determine the coefficient of surface heat transfer based on analytical approaches and to compare the values to that determined by the standard method. Samples were spheres made from wood for analytical approach and made from copper for lumped capacitance method. The results indicate that the values of the coefficient of surface heat transfer determined by both methods were significantly similar. The conductivity, and the coefficient of surface heat transfer of spherical wood simultaneously can be determined using the analytical approaches for transient heat transfer on spheres.
Strategi Pemasaran Minyak Goreng Berdasarkan Analisis Indeks Sikap Konsumen dan Analisis SWOT di Yogyakarta Agus Basuki; Makhmudun Ainuri; Moch. Maksum
agriTECH Vol 17, No 4 (1997)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2340.679 KB) | DOI: 10.22146/agritech.19341

Abstract

Dalam menyusun strategi pemasaran yang baik, sebuah perusahaan barns mengetahui sikap atau penerimaan konsumen terhadap produknya clan perbandingan produknya dengan produk pesaingnya. Analisis yang dibutuhkan adalah analisis sikap konsumen dan analisis SWOT. Dari analisis sikap konsumen dapat diketahui tingkat penerimaan konsumen terhadap atribut produk. Dalam penelitian ini atribut yang dinilai penting oleh konsumen dalam melakukan pembelian adalah rasa dan aroma (0,16), harga (0,14) dan kenampakan minyak goreng (0,13). Sikap konsumen terhadap produk ditunjukkan melalui nilai indeks sikap konsumen yang menunjukkan sikap cukup balk dengan daerah penerimaan 2,5
Makanan Fungsional, Konsep dan Peraturannya Mary Astuti
agriTECH Vol 17, No 4 (1997)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1276.941 KB) | DOI: 10.22146/agritech.19342

Abstract

Perlu adanya persepsi yang sama tentang apa yang dimaksud dengan makanan fungsional yang dipopulerkan Jepang sebagai FOSHU yang berupa makanan biasa bukan pit ataupun kapsul, dan merupakan makanan yang dirancang sedemikian rupa sehingga fungsi fisologis dapat lebih dioptimalkan terutama untuk mencegah secara dint terjadinya penyakit tertentu. Peraturan perlu segera dipersiapkan baik yang berlaku secara nasional ataupun internasional. Indonesia telah mempunyai Undang-undang Pangan tetapi belum ada peraturan yang mengatur tentang makanan fungsional. Makanan fungsional nampaknya mempunyai prospek yang cukup balk untuk dikembangkan di Indonesia yang dapat digali dart berbagai sumber bahan makanan yang seiama ini dipercaya masyarakat dapat menjaga kesehatan

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