synopsis-in this research, possible usage of eaf dust on cement is investigated. therefore, effects of addition of different percentages of eaf dust on the most important properties of cement such as hydration heat, water coefficient, viscosity, initial and final setting times, strength development and leachability of heavy metals were studied. results showed that eaf dust alters the characteri...

background: this cross sectional study was carried out to determine the relationship between metal dust exposure and respiratory health in male steel workers in terengganu, malaysia. methods: subjects were interviewed using a structured questionnaire from british medical research council (bmrc) questionnaire regarding respiratory symptoms and were examined their lung function using spirometer. ...

The absorptive properties of dust aerosols largely determine the magnitude of their radiative impacts on the climate system. Currently, climate models use globally constant values of dust imaginary refractive index (IRI), a parameter describing the dust absorption efficiency of solar radiation, although it is highly variable. Here we show with model experiments that the dust-induced Indian summ...

Introduction: The study of dust evolution in protoplanetary disks is crucial for understanding the textual, chemical and isotopic properties of chondrites. It is widely accepted that chon-drules were formed by melting of precursor dust grains in the solar nebula. Thus the typical size of chondrules would be correlated with the dust growth process. In addition, once dust grains have grown to ~ m...

Dust storms are devastating natural disasters that cost billions of dollars and many human lives every year. Using the Non-Hydrostatic Mesoscale Dust Model (NMM-dust), this research studies how different spatiotemporal resolutions of two input parameters (soil moisture and greenness vegetation fraction) impact the sensitivity and accuracy of a dust model. Experiments are conducted by simulating...

The size and velocity distribution of cosmic dust particles entering the Earth's atmosphere is uncertain. Here we show that the relative concentrations of metal atoms in the upper mesosphere, and the surface accretion rate of cosmic spherules, provide sensitive probes of this distribution. Three cosmic dust models are selected as case studies: two are astronomical models, the first constrained ...

At first, laboratory-scale work under aerobic conditions was undertaken on bacteria imported from the USA. The system was optimised for variables including pH, temperature, nutrient type (e.g. glucose, molasses) and nutrient addition rate. As the effluent could contain phenols, tolerance to phenols at different concentrations was also investigated, including the possibility of utilising phenol ...

1182. Lunar and Planetary Institute, Houston (CD-