cover
Contact Name
Rachma Wikandari
Contact Email
rachma_wikandari@mail.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
agriTECH
ISSN : 02160455     EISSN : 25273825     DOI : 10.22146/agritech
Core Subject : Agriculture,
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).
Articles 18 Documents
Search results for , issue "Vol 31, No 4 (2011)" : 18 Documents clear
Aplikasi Sistem Monitoring Pertumbuhan Tanaman Berbasis Web Menggunakan Machine Vision Lilik Sutiarso; Atris Suyantohadi; Dody Kastono; Andri Prima Nugroho
agriTECH Vol 31, No 4 (2011)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (597.984 KB) | DOI: 10.22146/agritech.9644

Abstract

Nowadays, demand for integrating between information technology (IT) and development of agricultural system isin order to increase the productivity, efficiency and profitability in term of precision agriculture. This matter occurred due to some problems in the field, such as; unintensively monitoring activities for plant during the growing period. One of the alternative solutions to overcome the problem was introducing the machine vision technology in the farming system. The research is actually as a basic research that aims using technology of digital image processing and software of computation (mathematics) to support a function of real-time monitoring system for plant growing. The research mechanism was started from digital image processing by using an image segmentation method that can identify between the main object (plant) and others (soil, weed). Image processing algorithm used excess color method and color normalization to identify plants, to calculate crop area. Otsu method was used to convert it to binary images. The next was to calculate and analyze a percentage of the plant growing, from after planting until harvesting time. The analyzed data were stored as MySQL database format in the web server. Final output of the research was the web based monitoring instruments for plant growing that can be accessed through intranet (local area network) as well as internet technology. From the software testing, monitoring with a machine vision system has a success rate reached 70 % for identifying plants.ABSTRAKTuntutan integrasi teknologi sistem informasi dan sistem pertanian saat ini dimaksudkan guna mendukung efisiensi,produktivitas dan profitabiltas pertanian. Hal tersebut didorong oleh timbulnya permasalahan di lapangan terkait dengan belum optimalnya produktivitas tanaman yang diakibatkan antara lain, kurang intensifnya pemantauan (monitoring) tanaman pada masa pertumbuhan. Salah satu alternatif solusi untuk memperbaiki permasalahan tersebut dengan mengaplikasikan teknologi machine vision. Penelitian yang dilakukan merupakan penelitian dasar yang bertujuan memanfaatkan teknologi pengolahan citra digital dan perangkat lunak komputasi untuk mendukung fungsi monitoring pertumbuhan tanaman secara real-time. Mekanisme penelitian dimulai dengan tahap pengolahan citra digital yang menggunakan metode segmentasi untuk mengenali objek tanaman dengan objek lainnya. Algoritma pengolahan citra menggunakan metode kelebihan hijau dan normalisasi warna, sedangkan untuk menghitung luas tanaman digunakan metode  Otsu  dengan  mengubah  ke  citra  biner. Tahap  berikutnya  menghitung  prosentase  pertumbuhan  tanaman selama proses budidaya sampai dengan panen. Data hasil pencitraan disimpan dalam basisdata MySql. Hasil akhir dari pengolahan data ditampilkan sebagai informasi pertumbuhan tanaman yang ditampilkan di website. Dari hasil pengujian, sistem monitoring dengan machine vision ini memiliki tingkat keberhasilan mencapai 70 % dalam mengenali tanaman.
Metode Ekstraksi Pelarut Berbantuan Ultrasonik untuk Recovery Minyak dari Limbah Cair Pabrik Kelapa Sawit Muhammad Dani Supardan; Teku M. Asnawi; Yulia Putri; Sri Wahyuni
agriTECH Vol 31, No 4 (2011)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (239.595 KB) | DOI: 10.22146/agritech.9645

Abstract

In this study, application of ultrasound-assisted solvent extraction for recovery of oil from palm oil mill effluent (POME)was studied. Extraction conditions such as volume ratio of POME to solvent, extraction time and type of solvent were investigated. Extraction was carried out at room temperature with total volume (POME and solvent) of 300 ml. The experimental results showed that ultrasound-assisted extraction provided higher yield than without ultrasound using mechanical stirring. The highest oil yield of 0.265 % obtained at ultrasound-assisted extraction condition of volume ratio of POME to solvent 5:1, extraction time of 60 minutes using n-hexane as solvent. The highest oil yield and carotene concentration were obtained by n-hexane. Meanwhile, there was no significant differenece of carotene concentration obtained from ultrasound-assisted and without ultrasound-assisted extraction.ABSTRAKPenelitian ini bertujuan mempelajari metode ekstraksi pelarut berbantuan ultrasonik untuk recovery minyak dari limbahcair pabrik kelapa sawit. Ekstraksi dilakukan pada temperatur kamar dengan menggunakan volum total campuran (limbah dan pelarut) sebanyak 300 ml. Variabel penelitian yang digunakan adalah rasio volum limbah terhadap pelarut (1:1; 2:1; 4:1; dan 5:1), waktu ekstraksi (30, 60, 90 dan 120 menit), dan jenis pelarut (n-heksan dan petroleum eter). Hasil penelitian menunjukkan bahwa ekstraksi berbantuan ultrasonik menghasilkan rendemen minyak yang lebih besar dibandingkan ekstraksi tanpa bantuan ultrasonik dengan menggunakan pengadukan mekanik. Rendemen minyak tertinggi sebesar 0,265 % diperoleh pada proses ekstraksi berbantuan ultrasonik dengan rasio volum limbah terhadap pelarut 5:1, waktu ekstraksi 90 menit dengan menggunakan pelarut n-heksan. Rendemen minyak dan konsentrasi karoten yang lebih tinggi diperoleh pada ekstraksi menggunakan pelarut n-heksan. Metode ekstraksi pelarut berbantuan ultrasonik dan tanpa bantuan ultrasonik memberikan perbedaan yang tidak signifikan terhadap konsentrasi karoten yang terdapat dalam minyak yang telah direcovery.
Moisture Loss Models of Sweet Potato, Cassava and Taro During Frying Ratnaningsih Ratnaningsih; Djajeng Sumangat; Budi Rahardjo
agriTECH Vol 31, No 4 (2011)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (215.991 KB) | DOI: 10.22146/agritech.9646

Abstract

Sweet potato, cassava and taro were cut into stick (0.01 x 0.01 x 0.05 m) and deep fat fried at three temperatures (160,170 and 180 ºC) for 0 to 360 s. The effects of these cooking methods on moisture loss characteristics were evaluated. The rapid moisture loss from the sticks within the first 100 s of deep fat frying followed by considerably reduced rates. Moisture diffusivity in sweet potato, cassava and taro sticks were evaluated using analytical solution of Fick’s second law diffusion equation. Moisture diffusivities  were ranging from 1.43x10-8  to 1.99x10-8  m2/s, 1.38x10-8  to 2.25x10-8 m2/s, and 3.08x10-8 to 5.25x10-8 m2/s respectively, at temperatures ranging from 160 to 180 ºC, for sweetpotato, cassava and taro. Corresponding activation energies for moisture transfer were 26.88; 39.61 and 43.51 kJ/mol for sweet potato, cassava and taro deep fat frying, respectively.
Karakteristik dan Profil Inulin Beberapa Jenis Uwi (Dioscorea spp.) Sri Winarti; Eni Harmayani; Rudi Nurismanto
agriTECH Vol 31, No 4 (2011)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (184.83 KB) | DOI: 10.22146/agritech.9647

Abstract

Wild yams (Dioscorea spp.) grow well in Indonesia known as Uwi, is the kind of tubers that grow in the community,but they have not been used optimally. Publicity about the characteristics and types has been limited. The tubers contain inulin, but also there have been no publication related.The purpose of this study was to uncover the characteristics of wild yam and inulin profiles contained in the tubers.The yams were obtained from various regions in East Java, among others Pacet Mojokerto, Karang Ploso and Kawi Mountains in Malang, Nganjuk, and traditional markets in Surabaya.The tubers were characterized for shape and size of tubers, skin color and flesh tubers, average weight and texture of the tuber, moisture content, ash content and levels of inulin, texture and flavor. The data were analyzed using Analysis of Variance (ANOVA) and further test Duncan’t Multiple Range Test (DMRT).Based on the characteristics of tubers, there were 10 types of wild yams, namely D1 (Dioscororea alata/ white yam), D2 (Dioscorea pinthaphylla/frog yam), D3 (Dioscorea hispida /Gadung), D4 (Dioscorea alata /purple yam with yellow skin), D5 (Dioscorea alata /purple yam), D6 (Dioscorea esculenta/gembili), D7 (Dioscorea alata/yellow yam), D8 (Dioscorea opposita/white yam with yellow skin), D9 (Dioscorea bulbifera/gembolo) and D10 (Dioscorea rotundata/ white yam with brown skin). The highest levels of inulin obtained in Dioscororea esculenta (gembili) ie 14.77 % (db). The water content rangedbetween 71.89- 85.07 % (wb), ash content 0.59- 1.83 % and texture between 0.012 to 0.055 (mm/g.dt). Organoleptic score was 2.75 to 4.55 texture and taste is from 3.20 to 5.00.ABSTRAKUwi merupakan jenis umbi-umbian yang tumbuh di Indonesia, namun belum dimanfaatkan secara optimal dan belumbanyak publikasi mengenai kharakteristik dan jenis-jenisnya. Uwi mengandung inulin, namun belum banyak publikasi yang mengungkap kadar inulin pada berbagai jenis umbi uwi tersebut.Tujuan dari penelitian ini adalah mengetahui kharakteristik fisik dan kimia jenis-jenis umbi uwi (Dioscorea spp.), serta profil inulin yang terkandung dalam masing-masing umbi.Beberapa jenis uwi diperoleh dari berbagai daerah di Jawa Timur, antara lain Pacet Mojokerto, Karang Ploso dan Pegunungan Kawi Malang, Nganjuk, dan pasar tradisional Surabaya. Karakteristik fisik yang diamati meliputi , bentuk dan ukuran umbi, warna kulit dan daging umbi, berat rata-rata dan tekstur umbi. Karakteristik kimia yang diamati meliputi kadar air, kadar abu dan kadar inulin. Karakteristik organoleptik pada uwi kukus yang diamati adalah tekstur dan rasa. Data yang diperoleh dianalisis menggunakan Analisis Varian (ANOVA) dan uji lanjut Duncan’t Multiple Range Test (DMRT).Dari hasil karakterisasi diperoleh 10 jenis uwi yaitu D1 (Dioscororea alata/uwi putih), D2 (Dioscorea pinthaphylla/ uwi katak), D3 (Dioscorea hispida/uwi gadung), D4 (Dioscorea alata/uwi kuning kulit ungu), D5 (Dioscorea alata/ uwi ungu), D6 (Dioscorea esculenta/gembili), D7 (Dioscorea alata/uwi kuning), D8 (Dioscorea opposita/uwi putih kulit kuning), D9 (Dioscorea bulbifera/gembolo), dan D10 (Dioscororea rotundata/uwi putih kulit coklat).Kadar inulin tertinggi diperoleh pada Dioscororea esculenta (gembili) yaitu 14,77 % (db). Kadar air berkisar antara71,89-85,07 % (wb), kadar abu 0,59-1,83 % dan tekstur   antara 0,012-0,055 (mm/g.dt). Skor organoleptik tekstur adalah 2,75-4,55 dan rasa adalah 3,20-5,00.
Rekayasa Proses Hidrolisis Pati dan Serat Ubi Kayu (Manihot utilissima) untuk Produksi Bioetanol Yuana Susmiati; Dwi Setyaningsih; Titi Candra Sunarti
agriTECH Vol 31, No 4 (2011)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (201.652 KB) | DOI: 10.22146/agritech.9648

Abstract

Ethanol production from cassava (Manihot utilissima) usually uses enzymatic process for starch hydrolysis. Enzymatichydrolysis by α-amylase and amyloglucosidase enzymes are not able to convert cassava fibers into sugars. Dilute acid hydrolysis is applied to convert both starch and fibers, which will increase the yield of simple sugars as fermentable sugars and resulting in high ethanol production. In this research there are two steps of dilute acid hydrolysis, first for starch hydrolysis at H SO concentration of 0.1-0.5 M, 5-15 minutes and second for fiber hydrolysis at 0.5-1.0 24M H SO , 10-20 minutes, at the same temperature of 121-127 oC and pressure of 1.0-1.5 atm. The disadvantage of acid hydrolysis is the formation of toxic compounds such as hydroxymethyl furfural (HMF) which is inhibited yeast fermentation. Therefore, acid hydrolyzates were detoxified with NH OH before use as fermentation substrate. The best starch hydrolysis condition was obtained at 0.4 M H SO  for 10 minutes which gave 257.37 g/l of total sugars, 24229.38 g/l of reducing sugars, 89.59 of dextrose equivalent (DE) and 0.57 g/l of HMF. While the best fiber hydrolysis performed at 1.0 M H SO  solution for 20 minutes which gave 79.74 g/l of total sugars, 70.88 g/l of reducing sugars, 2488.99 of DE and 0.0142 g/l of HMF. Single direct acid hydrolysis was the most suitable substrate for yeast fermentationwith the ethanol concentration of 5.7 % (w/v) and 30.5 % (w/w) of ethanol yield. This result is comparable with enzymatic hydrolysis which gave ethanol yield of 30 % (w/w).ABSTRAKProduksi etanol dari ubi kayu biasanya menggunakan enzim untuk menghidrolisis pati. Hidrolisis secara enzimatismenggunakan enzim α-amilase dan amiloglukosidase tidak mampu mengkonversi serat menjadi gula. Hidrolisis asam  berkonsentrasi  rendah  dilakukan  untuk  mengkonversi  pati  dan  serat,  sehingga  gula-gula  sederhana  yang dapat difermentasi meningkat dan menghasilkan produksi etanol tinggi. Pada penelitian ini ada dua tahap hidrolisis menggunakan asam berkonsentrasi rendah, yaitu tahap pertama untuk menghidrolisis pati dengan konsentrasi H SO 0,1-0,5 M selama 5-15 menit dan tahap kedua untuk menghidrolisis serat dengan kensentrasi H SO  0,5-1,0 M selama 2410-20 menit pada suhu dan tekanan sama, yaitu 121-127 oC dan 1,0-1,5 atm. Kekurangan pada hidrolisis asam adalahterbentuknya senyawa toksik seperti hidroksimetil furfural (HMF) yang mengganggu fermentasi khamir. Oleh karena itu hidrolisat asam didetoksifikasi menggunakan NH OH sebelum digunakan sebagai substrat fermentasi. Kondisi terbaik hidrolisis pati diperoleh pada konsentrasi H SO  0,4 M selama 10 menit dengan nilai total gula 257,37 g/l, 24gula pereduksi 229,38 g/l, dextrose equivalent (DE) 89,59 dan HMF 0,57 g/l. Selain itu kondisi terbaik hidrolisis serat diperoleh pada konsentrasi H SO  1,0 M selama 20 menit dengan nilai total gula 79,74 g/l, gula pereduksi 70,88 g/l, 24DE 88,99 dan HMF 0,0142 g/l. Hidrolisat asam yang paling sesuai digunakan sebagai substrat fermentasi adalah darihidrolisis satu tahap tanpa pemisahan serat yang menghasilkan etanol dengan konsentrasi 5,7 % (b/v) dan rendemen etanol 30,5 (b/b). Hasil tersebut tidak berbeda jauh dengan hidrolisis enzimatis yang mengasilkan rendemen etanol 30% (b/b).
Reviewer Volume 31, Tahun 2011 Reviewer Volume 31, Tahun 2011
agriTECH Vol 31, No 4 (2011)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (68.015 KB) | DOI: 10.22146/agritech.22037

Abstract

Agnes Murdiati, Jurusan Teknologi Pangan dan Hasil Pertanian, Fakultas Teknologi Pertanian, Universitas Gadjah Mada, Jl. Flora, Bulaksumur, Yogyakarta 55281Andreas Wahyu Krisdiarto, Fakultas Teknologi Pertanian, Institut Pertanian, Yogyakarta, Jl. Nangka II, Maguwoharjo, Depok, Sleman Yogyakarta 55282Andriati Ningrum, Jurusan Teknologi Pangan dan Hasil Pertanian, Fakultas Teknologi Pertanian, Universitas Gadjah MadaJl. Flora, Bulaksumur, Yogyakarta 55281Asrul Muhamad Fuad, Pusat Penelitian Bioteknologi Lembaga Ilmu Pengetahuan Indonesia, Jl. Raya Bogor KM 4,6, Cibinong 16911Atris Suyantohadi, Jurusan Teknologi Industri Pertanian, Fakultas Teknologi Pertanian, Universitas Gadjah Mada, Jl. Flora, Bulaksumur, Yogyakarta 55281
Indeks Penulis Volume 31, Tahun 2011 Indeks Penulis Volume 31, Tahun 2011
agriTECH Vol 31, No 4 (2011)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (54.645 KB) | DOI: 10.22146/agritech.22038

Abstract

Ahmadi, K.G.S. 36, 171Anom, I.D.K. 260Apriyati, E. 46Ariono, D. 242Ariviani, S. 180Arkeman, Y. 60Asnawi, T.M. 368Atmawinata, O. 228
Indeks Subjek Volume 31, Tahun 2011 Indeks Subjek Volume 31, Tahun 2011
agriTECH Vol 31, No 4 (2011)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (80.158 KB) | DOI: 10.22146/agritech.22039

Abstract

Acid hydrolysis 384Activated carbon 30Adsorption 30Adsorption by active carbon 305Adsorption isotherm 30Afl atoxin B1 168Agroecotourism 139Alcohol 325Alkali 190Ana apple juice 352Analytical Hierarchy Process (AHP) 139Anthocyanidin 93Anthocyanin 93Antibacterial activity 305Antioxidant 290Antiplatelet 52Audit 1Autooxidation 281

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