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People can be exposed to asphalt in the workplace by breathing in fumes or skin absorption. The National Institute for Occupational Safety and Health (NIOSH) has set a Recommended exposure limit (REL) of 5 mg/m3 over a 15-minute period. Asphalt is basically an inert material that must be heated or diluted to a point where it becomes workable for the production of materials for paving, roofing, and other applications. In examining the potential health hazards associated with asphalt, the International Agency for Research on Cancer (IARC) determined that it is the application parameters, predominantly temperature, that effect occupational exposure and the potential bioavailable carcinogenic hazard/risk of the asphalt emissions. In particular, temperatures greater than 199 C (390 F), were shown to produce a greater exposure risk than when asphalt was heated to lower temperatures, such as those typically used in asphalt pavement mix production and placement.

What feature in the treatment of asphalt in the workplace causes the most potential danger?
Answer: temperature
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On 12 February 1912, after rounds of negotiations, Longyu issued an imperial edict bringing about the abdication of the child emperor Puyi. This brought an end to over 2,000 years of Imperial China and began an extended period of instability of warlord factionalism. The unorganized political and economic systems combined with a widespread criticism of Chinese culture led to questioning and doubt about the future. In the 1930s, the Empire of Japan invaded Northeast China and founded Manchukuo in 1932, with Puyi, as the emperor. After the invasion by the Soviet Union, Manchukuo collapsed in 1945.

When was Manchukuo created?
Answer: 1932
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The Protestant movement began to diverge into several distinct branches in the mid-to-late 16th century. One of the central points of divergence was controversy over the Eucharist. Early Protestants rejected the Roman Catholic dogma of transubstantiation, which teaches that the bread and wine used in the sacrificial rite of the Mass lose their natural substance by being transformed into the body, blood, soul, and divinity of Christ. They disagreed with one another concerning the presence of Christ and his body and blood in Holy Communion.

When did Protestantism begin to split?
Answer:
the mid-to-late 16th century