this article addresses the interplay between heat of hydration and physico-mechanical properties of calcium sulfate hemi-hydrate in the presence of retarding additives such as citric and malic acids and sodium citrate. the heat of hydration was measured using a semi-isothermal calorimeter. results proved that citric and malic acids had superior impact on hydration and mechanical properties. whi...

In order to ensure the safety of inflammable and explosive chemical substance such as nitrocellulose (NC) mixtures in the process of handing, storage, and usage, it is necessary to obtain the fire properties of NC with different exterior structures. In present study, fire properties of two commonly used nitrocelluloses with soft fiber structure and white chip structure were investigated by scan...

This work reports the use of non-traditional fillers as flame retardants in polyester resin composites. Studies have been carried out to evaluate the fire-retardant properties of non-traditional fillers viz. hydroxyapatite, zinc borate and fly ash in combination with traditional fire retardant filler antimony trioxide, in prepolymer polyester resin composite system. Polyester resin was synthesi...

This paper uses a fire protection measure based on a community’s tire insurance rating to estimate the strength of congestion effects for fire protectron services. The empirical results show that the congestion properties of fire protection are much like those of a pure public good. In addition, the paper introduces a new notion of returns to scale for public goods and estimates the relevant pa...

A wildland fire-behavior module, named WRF-Fire, was integrated into the Weather Research and Forecasting (WRF) public domain numerical weather prediction model. The fire module is a surface firebehavior model that is two-way coupled with the atmospheric model. Near-surface winds from the atmosphericmodel are interpolated to a finer fire grid and are used, with fuel properties and local terrain...

1. The thyroid exerts a retarding action on the carbohydrate destroying mechanism of the body. 2. This retarding action is not changed when the gland is boiled, showing that it is not a ferment action. 3. Iodothyrin, the active principle of the gland, exerts this retarding influence more markedly even than the whole thyroid. 4. This antagonism between the thyroid and the carbohydrate destroying...

Wildland fire, a natural feature of ecosystems, causes extensive damage to forests, properties, and affects human lives. Since the last century, North American forest communities have been vitally concerned with wildland fires. In eastern United States (east of the Mississippi River), wildland fire is a very important issue because of frequent fire occurrences and their effects on the environme...

Neary, Daniel G. ; Ryan, Kevin C. ; DeBano, Leonard F., eds. 2005. Wildland fire in ecosystems: effects of fire on soi ls and water. Gen. Tech. Rep. RMRS-GTR-42-vol.4. Ogden , UT: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 250 p. This state-of-knowledge review about the effects of fire on soils and water can assist land and fire managers with information on...