About 40 percent of all the energy consumed by buildings worldwide is used for space heating and cooling. With the warming climate as well as growing populations and rising standards of living — especially in hot, humid regions of the developing world — the level of cooling and dehumidification needed to ensure comfort and protect human health is predicted to rise precipitously, pushing up global energy demand.Much discussion is now focusing on replacing the greenhouse gases frequently used as refrigerants in today’s air conditioners. But another pressing concern is that most existing sys...
发布时间:
2018
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Scalable manufacturing process spools out strips of graphene for use in ultrathin membranes.MIT engineers have developed a continuous manufacturing process that produces long strips of high-quality graphene.The team’s results are the first demonstration of an industrial, scalable method for manufacturing high-quality graphene that is tailored for use in membranes that filter a variety of molecules, including salts, larger ions, proteins, or nanoparticles. Such membranes should be useful for desalination, biological separation, and other applications.“For several years, researchers have thought...
发布时间:
2018
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04
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浏览次数：34523
Tiny self-propelled microbots can remove up to 95 percent of the lead in wastewater produced by industrial activity.Artistic impression of the nanobots in action.Humans are pretty effective at messing up everything. Look at all the tech we use. It doesn't come without a cost.Manufacturing electronics and batteries produces contaminants such as lead, cadmium, mercury, arsenic and chromium, none of which is particularly good for living organisms.Tohelp combat this destructive effect, an international team of researchers has developed a school of tiny microbots, each smaller than the width of...
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2016
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浏览次数：34523
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2011
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浏览次数：34523