H4-VV28A compact steel couplings provide extremely precise Helical speed reduction gearboxes H4

Flender/Flender Gear Units/Helical speed reduction gearboxes H4

gher dose rate of 8 kGy/ produced slightly better sprout inhibition than the same dose at dose rate of 0.5 kGy/ (Horis and Kawasaki, . 7.3.3 Mushrooms Mushrooms are popular food products. The level of loss during marketing can be as high as 4%. The loss of mushroom quality is marked by brown discoloration of the surface Irradiation 6 (Lutz and Hardenberg, , cap opening, stipe elongation, cap diameter increase, weight loss, and texture changes (Gormley, . The loss of whiteness in storage is complexprocess (Mac Canna and Gormley, . Polyphenol oxidase enzymes present in themushroom cells cause browning when they are subjected to forces that can disrupt cellularintegrity, such as vibrations, rough handling, and aging (Guthrie, 1; Hughes, . Polyphenol oxidase enzyme, oxidize phenolic compounds present in the mushroom such as tyrosine to quinones, which condense to form the brown melanin pigments (Long andAlben, . The presence of bacterial infection can also cause brown discoloration.Bacterial disorders are the main postharvest factor affecting the shelf life of mushroom,especially after removal from refrigerated storage, resulting in slimy texture. Pseudomonas tolaasii , regarded as normal constituent of the microora of the mushroom bed, can produce metabolic substance toxic to mushrooms under certain conditions. The infection appears as brown injury. Wong and coworkers ( described another mushroomdisease, ginger blotch (GBO), caused by Pseudomonas , which produces supercial discol- oration (ginger). Molds can also affect the quality of fresh mushrooms. Mycogone pernici- osa magnus can also grow on mushrooms. Low-dose irradiation in combination with con- trolled storage is very effective method for controlling the deterioration of fresh mushrooms caused by senescence and microbial activity. Irradiation treatment at 1 kGy can extend the shelf life from 2 to 4 days at 1 by reduction of the microora, slowing the respiration and the morphological transf