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Jurnal Teknologi Pertanian
Published by Universitas Brawijaya
ISSN : 14115131     EISSN : 25282794     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Computer Science & IT
Jurnal Teknologi Pertanian diterbitkan oleh Fakultas Teknologi Pertanian Universitas Brawijaya untuk penyebarluasan hasil penelitian yang dilakukan oleh para peneliti dari dalam dan luar Fakultas Teknologi Pertanian Universitas Brawijaya. Jurnal Teknologi Pertanian terbit tiga kali dalam setahun, memuat tulisan hasil penelitian yang termasuk dalam lingkup disiplin ilmu pengetahuan yang terkait dengan Ilmu-ilmu Teknologi Pertanian guna menunjang pengembangan ilmu pengetahuan dan teknologi serta pembangunan nasional.
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Articles 2 Documents
 1 
Search results for , issue " Vol 9, No 2 (2008)" : 2 Documents clear
Head Loss Determination along Pipe of Drip Irrigation System using Small Pipe Emitter Made From Local Material Mechram, Siti
Jurnal Teknologi Pertanian Vol 9, No 2 (2008)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (182.788 KB)

Abstract

Irrigation is an important factor in agricultural rop planting trickle or drip irrigation method is casier in operational, reguire a lower operational pressure and has a possibility to make from local material. Drip irrigation is a method of water application in form of drip on the soil surface or subsurface. Head loss along lateral is a common problem found in this method caused high variation in emitter discharge. This research aimed to determine emitter head loss along lateral, impact of emitter discharge on operational pressure, pipe diameter and treatment applied on lateral. This research utilized small pipe (1.6 mm in diameter) as emitter. Output discharge more collected and analyzed using complete random design method having 3 level of pressure (4, 6, and 8 psi) and 3 level of lateral diameter (1/3, ¾, and 1 inchi). Head loss calculated using Darcy-Weisbach formula. Result showed a trend of increasing emitter discharge by increasing operational pressure. Increasing in emitter discharge was also found when a larger diameter used in system. Discreasing in head loss was detected when higher pressure a larger lateral used. Emitter uniformity coeffisien, calculated using cristiansen formula, was 91.2 % showing a selected emitter type was acceptable for drip irrigation method.Keywords: emitter, head lose, drip irrigation
Efectiveness of Whey Protein Consentrates and Dextrins to Maintain Viability of Lactic Acid Bacteria in Frozen Dried Starter Yoghurt Karinawatie, Shanty; Kusnadi, Joni; Martati, Erryana
Jurnal Teknologi Pertanian Vol 9, No 2 (2008)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (180.762 KB)

Abstract

The aim of this research was to investigate the effect of dextrins (0, 35, 40 and 45% (w/w) as cryoprotectant agent and whey protein concentrates (WPC) (0, 2 and 4% (w/v)) as nutrition which promote lactic acid bacteria (LAB) growth, to maintain viability of LAB in frozen dried yoghurt starter. The result of this study showed that WPC and dextrin can maintain LAB yoghurt in frozen dried starter, effectively. WPC concentrations showed very significant difference on LAB total and water content. Dextrin concentrations showed very significant difference on all parameters. The best treatment resulted from the combination of 4% WPC and 45% dextrin added. The characteristics were LAB total of 8,21 log CFU/g, water content of 5,28% and lightness 71. Yoghurt product made by the best treatment of frozen dried starter were not give significant differences with yoghurt product using liquid starter on LAB total, pH, acidity total and reducing sugar. To make yoghurt, the percentage of frozen dried starter was 7,45% (w/v) whereas the percentage of liquid starter was 2% (w/v).Key Word : LAB viability, frozen dried starter, freeze drying, dextrin, WPC

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