The main drawbacks of microwave heating of bioproducts (e.g. foods) are associated with its nonuniform heating patterns. The objective of this work was to derive optimal operating policies for microwave combination ovens in order to achieve better uniformity of temperature and/or quality. The corresponding optimal control problems were stated considering the microwave power and the oven tempera...

BACKGROUND Workers on coke oven plants may be exposed to potentially carcinogenic polycyclic aromatic hydrocarbons (PAHs), particularly during work on the ovens tops. Two cohorts, employees of National Smokeless Fuels (NSF) and the British Steel Corporation (BSC) totalling more than 6,600 British coke plant workers employed in 1967, had been followed up to mid-1987 for mortality. Previous analy...

facultative heterofermentative lactobacilli (fhl) are responsible for enhancing unique flavour properties in traditional dairy products such as lighvan cheese through biochemical mechanisms. in addition to saving domestic genetic resources, industrial production of semi-traditional dairy products is one of the major objectives of non starter microflora identification in indigenous dairy product...

AIMS The sterilization of instruments in rural health clinics in less developed countries is an increasing problem as chemical methods can no longer be recommended and fuel wood is becoming increasingly scarce. It seems obvious, therefore, to utilize solar energy for sterilization purposes. METHODS AND RESULTS A solar oven was designed and manufactured using local materials and simple tools. ...