say the lack of fresh food is to blame. with just one in five children having any vegetables or salad in their packed lunch, the researchers argue that the government should consider making fresh vegetables freely available in schools. they are also calling on the food industry to look at ways of making...
say the lack of fresh food is to blame. with just one in five children having any vegetables or salad in their packed lunch, the researchers argue that the government should consider making fresh vegetables freely available in schools. they are also calling on the food industry to look at ways of making...
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then be used in silicon-containing steels. in molten iron, silicon aids in maintaining carbon content within narrow limits required for a given steel grade. used in larger amounts, as in electrical steel, silicon favorably influences resistivity and ferromagnetic properties of the material. for use...
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are precipitated out of the gaseous mixture. activated charcoal is used as a final purification step, usually resulting in % pure grade-a helium.] the principal impurity in grade-a helium is neon. in a final production step, most of the helium that is produced is liquefied via a cryogenic process. this...
the steel microstructure and is more sensitive to corrosive attack in reducing environments with acidic ph values the amount of ferrite present in a given metal composition can be predicted by a calculation known as a "ferrite number". the higher the number, the more likely the composition will yield...