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Scitable is a free science library and personal learning tool brought to you by Nature Publishing Group, the world's leading publisher of science. Scitable currently concentrates on genetics and cell biology , which include the topics of evolution, gene expression, and the rich complexity of cellular processes shared by living organisms.
Gelcoats are special resins that are designed to form the first surface of a composite mould or part. Gelcoats are generally applied as a thickness of 0.3-0.7mm and are specially formulated to provide the part or mould surface with properties such as resistance to UV (ultraviolet) degradation, hydrolysis or osmosis (where water is absorbed into a composite over considerable time). Gelcoats also include thixotropic additives to make them thicker and more able to stick to inclined surfaces of moulds. Epoxy gelcoats are based on epoxide resin and polyamine hardener (just like epoxy resin) and should be used when making parts using epoxy resin , if a gelcoat surface is required. Gelcoats are applied to a mould surface and allowed to cure to a certain point before the first layer of laminate is applied.
Inventors: bike helmet of the future? A researcher at RMIT University hopes he's invented the bicycle helmet of the future. WOUTER Walmink never considered wearing a bicycle helmet until he moved to Melbourne a year ago. But after pedalling through the city's hectic streets, the Dutch designer realised he was going to need a helmet - so he set about making a better one. The result is the LumaHelm, a flashing headpiece with 104 multicoloured LED lights that illuminate like indicators when a cyclist tilts the head left or right.
Restructuring the energy system without nuclear power by 2050 is in principle technologically possible and economically manageable. However, it will demand a concerted effort by the whole of society.
An ETH Zurich research team-in collaboration with Roche Pharmaceuticals- has discovered a hitherto unknown mechanism by which the insulin producing beta cells are negatively affected.
1, aircraft radial engine
By the time you finish reading this article, you will undoubtedly think of Theo Gray when you hear someone say "mad scientist."