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Some animals, such as geckos, can easily climb up walls and across ceilings. But currently, no material exists that allows everyday people to scale walls or transverse ceilings as effortlessly. Now, scienti
asics sts report in ACS Applied Materials and Interfaces a dry adhesive that could someda
converse chucks y make it easier to defy gravity.Geckos can scale walls because of their unique toe pads that help them quickly attach and detach from surfaces. Interestingly, gecko toe pads are covered with bristle-like layers of a stiff material called keratin. The bristle-like structure of the keratin in a toe pad helps it to stick 鈥?each pad is covered with microscopic pillars, which then branch out at the tips into even smaller structures. Scientists have manufactured dry adhesives with similar properties, but they haven鈥檛 been as sticky as gecko toes
damen jordans . And some methods involve the use of layers, but the first layer is usually damaged as successive ones are applied. Other methods are not easily scaled up. Hemant K ISLAMABAD:The
adidas campus 00's price crash in the world crude market has forced seve
new balance pour femme ral energy companies to default on payments whereas others are also facing a hard time.Experts suggest that global crude oil prices will continue to stay sharply lower
ugg mini for the next five years and wipe out some companies from the energy map as these cannot survive due to the higher exploration cost. In such a scenario, many ask who will dictate the energy market in the future.There are expectations that some new players will emerge in the world market. During periods of low crude prices, Saudi Arabia has traditionally played a key role in the cartel of Organisation of Petroleum Exporting Countries (Opec). But now the flood of shale oil from the United States has shaken the group of oil-exporting countries.Iran鈥檚 role has also not been impressive over the years in the face of international sanctions and it has lost several markets. Now that curbs have been lifted, it will try to recapture some of the lost places. A team o
