dehydration is one of the most common preservation methods for button mushroom. dried mushroom slice and powder is used in formulation of soups and sauces. in this study, the effect of osmotic pretreatment on drying kinetics of button mushrooms was studied. thin slices of mushroom were immersed in osmotic solution containing 5% sodium chloride and 0.5% calcium chloride at a temperature 40 °c fo...

Measurements of the microwave power required for breakdown have been made in a simulated reentry boundary layer flow. By establishing a fully developed laminar pipe flow between cold walls, fed by a subsonic arc jet, we have simulated the appropriate boundary layer temperature, density, electron concentration, and chemical composition profiles over an altitude range from 80 to 180 kft. Correlat...

the objective of this study was to investigate dehydration kinetics of barberry (berberis vulgaris l.) at different drying temperatures (60 ºc, 70 ºc, 80 ºc), air velocities (0.3 m s-1, 0.5 m s-1, 1 m s-1) with two types of pretreatment. drying time and colour quality during dehydration were experimentally determined. barberries were dried from the initial moisture content of 73.44% (w.b.) to t...

In mines rescue operations two main types of self-contained breathing apparatus are used by men working in irrespirable atmospheres. One of these types of apparatus uses compressed oxygen and the other liquid air as the source of oxygensupply for the wearer. Each type of apparatus has its own distinct advantages in use, and these advantages have long been recognized. The present investigation d...

zaki’s reef is located in the gulf of suez, a narrow portion of the red sea, with exceptionally dry and hot climate and lacks almost all scientific data. this research intends to describe the area’s unique climatology, which may reveal correlations between the reef’s existence at high latitude and extreme climate conditions. air temperature at zaki’s reef fluctuated between 0.3 and 58.6oc with ...

The effects of hot air temperature (40, 50 and 60 oC) and Radiation Intensity (RI) (0.21, 0.31 and 0.41 w/cm2) on the response variables (drying time, Head Parboiled Rice Yield (HPRY), color value and hardness)) of parboiled rice were investigated. The drying was performed using hybrid hot air–infrared drying. The optimization of drying variables and the relationship b...

We describe a simple, compact, inexpensive thermal cycler that can be used for the polymerase chain reaction. Based on heat transfer with air to samples in sealed capillary tubes, the apparatus resembles a recirculating hair dryer. The temperature is regulated via thermocouple input to a programmable set-point process controller that provides proportional output to a solid state relay controlli...

Seven male students were exposed to four varied air temperature environments: hot (37 degrees C) to neutral (27 degrees C) (HN), neutral to hot (NH), cool (17 degrees C) to neutral (CN), and neutral to cool (NC). The air temperature was maintained at the first condition for 20 min, then was changed to the second condition after 15 min and was held there for 20 min. Each subject wore a T-shirt, ...

Resistive heating is an alternative to forced-air warming which is currently the most commonly used intra-operative warming system. We therefore tested the hypothesis that rewarming rates are similar with Hot Dog(®) (Augustine Biomedical) resistive and Bair Hugger(®) (Arizant) forced-air heating systems. We evaluated 28 patients having major maxillary tumour surgery. During the establishment of...

This paper deals with realization and implementation of a new type fractional order controllers (FOC) based on programmable logic controllers series BR 2005 and their utilization to temperature control with big time constant. As the object was used electrical heater, where controlled value is the temperature of hot air, which is fluctuant from heater.