Word: zinc
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Dates: during 1980-1989
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Recycling systems also show promise. Companies in California, for example, found that "pickling acid," which is needed in metal-processing plants to remove scale, could be mixed with zinc sulfate and used as a soil additive in citrus orchards, or mixed with air-filtered dust from scrap-steel plants to permit profitable recovery of zinc-iron compounds. Others have found that spent fluid from the manufacture of semiconductors could be used to refine old crankcase oil, helping to eliminate two disposal problems for the price...
...saved the survivors. He then installed these superbugs in a brand new $10 million water-treatment plant, putting billions of them on each of the 48 rotating disks that make up the plant's main processing unit. Because the bacteria possess a sticky body surface, they pick up zinc, iron and other metals in the water as it passes over the plates. They also eat the cyanide that once threatened to kill the waterway's marine life. Barely a year ago, the creek was too toxic for trout, but now they seem to be thriving...
There is confusion and concern over the proposals of the National Academy panel to reduce the recommended dietary allowances of iron, magnesium and zinc as well as vitamins A, B6 and C. The suggestions are part of a regular updating of the four-decade-old RDA tables, and must still get past months of elaborate academy review. Little objection is likely to the panel's plan of raising the calcium level for women, many of whom suffer from a debilitating bone condition in later years. But the downward revisions seem to some experts to be at odds with recommendations from...
...like the horses in Eisenstein's movies." Chemistry's periodic table, which arranges the elements according to their atomic number, is Levi's metaphor for the relationships that compose a human life. The Periodic Table consists of 21 episodes, most of them autobiographical, named after elements from argon to zinc, each with its relative density, characteristic properties and unique function in the author's remarkable life story...
...prevailing winds in Cairo blow north or south. One brings toxic fumes from the lead and zinc smelters in Shubra El Kheima just north of the city. When the wind shifts, it brings poisons from the steel and cement factories in the south, in Helwan. President Gamal Abdel Nasser converted the health resort of Helwan into an industrial showpiece in the late 1950s and 1960s. Today it is notable for its myriad dead trees...