B3CV-15-C lubrication by external flange mounted pump LP Bevel-helical gear reducers B3

Flender/Flender Gear Units/Bevel-helical gear reducers B3

period. Similar results had been obtained in an experiment to determine appropriate quarantine conditions for Bartlett pears (. Although lethality studies on insects were not conducted, it was determined that the pears could tolerate anaerobic conditions for up to 1 days, with low 2concentrations varying from 0.2% to 1%. Some studies provide evidence of the inuence of the mode of thermal treatment on the volatile proles of certain commodities. For example, it has been found that microwaveheating of sweet potatoes signicantly reduces the quantity of volatiles produced duringsubsequent baking, as compared to simply baking in convection oven (. The rapid initial heating with microwaves deactivates amylases before they can convert starch to maltose, the sugar that is precursor to many of the compounds in the prole. The storagestability of soybeans after thermal inactivation of enzymes by using microwaves has beenstudied (. The heating time signicantly inuences the storage stability, as representedby the concentration of hexanal in the headspace of oil or meal. Microwave thermal inacti- 5 Alvo et al. vation for 4 or 6 minutes resulted in the best stability over an 8-week period, whereas 8- minute inactivation resulted in heat damage. Quality changes in stored raw and steam-treated oat products from three varieties have been assessed (. Some avor and aromacharacteristics have been correlated with the headspace volatiles and found to depend onvariety in some instances (. This work indicated that increased storage stability re- sulted from heat treatment but also suggested that the conditions of heat treatment could inuence the sensory characteristics by altering the volatile prole. The levels of hexanalin the heat-treated samples remained low over 4 weeks of storage, whereas hexanal con-centrations associated with the raw samples increased rapidly after the 1th week. Bothof the studies described support earlier conclusions by several workers that hexanal is ag