首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Scientists have known for decades that coffee beans contain oil. Mohapatra and colleagues, however, were the first to analyze co
Scientists have known for decades that coffee beans contain oil. Mohapatra and colleagues, however, were the first to analyze co
admin
2010-12-04
46
问题
Scientists have known for decades that coffee beans contain oil. Mohapatra and colleagues, however, were the first to analyze coffee grounds.
Used grounds usually end up in landfills, though gardeners sometimes use them as a kind of fertilizer. The scientists collected used grounds from Starbucks, which gives bags of grounds away as part of the company’s "Grounds for your garden" program.
To prepare the grounds for analysis, the team first dried them in an oven. They mixed the resulting powder with a combination of solvents (溶剂) that caused the oil to separate from the solution. They extracted the oil, saving the solvents for the next round of processing. The remains could still be used as compost, ethanol feedstock, and fuel pellets.
"We’re not wasting anything, " Mohapatra told Discovery News. "It’s a recycling process."
The study showed that used grounds contain about 15 percent oil by weight, depending on the type of coffee. That’s not too far off the proportions in soybean, rapeseed, and palm oils, which are also used as sources for bio-diesel. And coffee oil is more stable than these other sources because of its high antioxidant content, found the study, which appeared in December in the American Chemical Society’s Journal of Agricultural and Food Chemistry.
Around the world, growers produce more than 16 billion pounds of coffee each year, according to the U.S. Department of Agriculture. The scientists estimate that spent grounds could add 340 million gallons of bio-diesel to the global fuel supply.
Mohapatra pictures a streamlined coffee recycling system, in which the same trucks that deliver beans to Starbucks could pick up the brewed waste and head to a bio-diesel plant. The plant would be close by, to save on transportation costs and emissions.
Coffee grounds appear to produce high-quality oil, granted Robert McCormick, an engineer at The National Renewable Energy Laboratory in Golden, Colorado. But, he said, coffee probably won’t be a practical solution to the world’s energy needs.
For one thing, the country’s main sources of bio-diesel-cooking oil and animal fat-are 100 percent oil, compared to coffee’s 15 percent. And even when a cafe brews a large amount of coffee, relatively few grounds are left behind. It takes 50 gallons of spent grounds to produce just 1 gallon of oil, Mohapatra said.
Still, McCormick commends the researchers for thinking outside the box about the world’s energy issues.
"Anything that takes a waste product and makes a fuel out of it is really a positive," he said. "This is pretty cool. "
By saying "thinking outside the box", McCormick wants to show his______towards the researchers.
选项
答案
respect/appreciation
解析
倒数第2段中的commend及末段中的positive和cool等词可知道McCormick对研究人员的成果怀有敬意或赞赏之情,因此本题答案可以是respect,appreciation或其他表示相同情绪的名词。
转载请注明原文地址:https://kaotiyun.com/show/bgs7777K
0
大学英语六级
相关试题推荐
JobsApersonplanningforacareertodaymustlookcarefullyattheexpectedoccupationaltrendsandchangesinthejobmar
Researchthatwentinto’developingthehighlyspecializedtechnologyforspacetravelhasresultedinmanyunexpectedpractical
AlthoughweAmericansinrecentdecadeshavegrownricher,ourchildrenhavegrownpoorer.Manyfamiliesnolongeradequatelype
A、Itistoofatty.B、Itisfullofsugar.C、Itcontainslittleprotein.D、Itisfilledwithpreservatives.D本题是因果题。第二段“Ican’te
Thescientistshaveworkedout______.(一种可以大规模提高农业生产的方法)
Itisamazinghowmanypeoplestillsay,"Ineverdream,"foritisnowdecadessinceitwasestablishedthateveryonehasover
A、Languagecourses.B、Universities.C、BritishandAmericanEnglish.D、Literaturecourses.D从选项看,问题可能与大学以及课程有关。女的问:“你在大学上了几门文学课?”
A、Agalleryowner.B、Abusinessman.C、Aclothingdesigner.D、Aphotographer.D本题问“男士可能从事什么工作”。对话中他们要去参加一个展览(gallery),从上文看是男士本人的影
Anindustrialsociety,especiallyoneascentralizedandconcentratedasthatofBritain,isheavilydependentoncertainessent
WhenthesunisupinAmsterdam,thelargestcityintheNetherlandssitsquietlyontheAmstelRiver.Youcanrentabicycle,v
随机试题
肺炎患儿,病室适宜的温度、相对湿度要求
[*]
A、Triumph.B、Significant.C、Asenseofburning.D、Prettytired.D题目问的是他在教学的最后一天是什么感受。burntout意为“极度劳累”,可知他极度疲劳,故选D。
A.右下腹剧痛B.血尿C.膈下游离气体D.血淀粉酶升高E.尿淀粉酶升高急性阑尾炎可表现为
球菌性口炎的致病菌不包括()
A.CD3B.CDl9C.KIRD.MHC-IIE.IL-2
在房地产拍卖中,竞买人的最高应价未达到()时,该应价不发生效力。
税收法律关系主要是由()三方面构成。
中国共产党领导的全国人民的抗日中心是()。
根据所给资料,回答问题。2013年1—2月,经某海关出口机电产品52.2亿美元,同比增长8%,增速比2011年同期上升3.3个百分点,低于同期经该海关外贸出口总额增速15.8个百分点,占同期经该海关出口总额的48%。2013年2月,经该海关的机电
最新回复
(
0
)