时间:2019-01-04 作者:英语课 分类:Scientific American(八)月


英语课

This is Scientific American’s 60-Second Science. I am Cynthia Graber. This will just take a minute. 


Solar panels typically convert sunlight into electricity or heat. But photosynthetic 1 vegetation converts sunlight into chemical energy. Now M.I.T.’s Daniel Nocera wants to bring photosynthesis 2 to your home. Solar power only works, obviously, when the sun shines. Nocera’s idea is to take solar power and use it to for electrolysis—to break apart water into hydrogen and oxygen—which then could be recombined when needed in a fuel cell. The problem is that current electrolyzer technology takes a lot of energy in a harsh, alkaline environment. That’s because, surprisingly enough, it’s hard to get the oxygen out of the water, not the hydrogen. Nocera designed a new catalyst 3 for that oxygen step that works at room temperature and pressure, in a glass of water. When a current runs through an electrode, phosphate and cobalt in the water form a thin film on that electrode. And O2 bubbles right up. The work appears in the July 31st issue of the journal Science. This system could be paired with another electrode for the hydrogen side. Nocera believes that electrolyzers could be cheap and efficient within a few years. 


Thanks for the minute for Scientific American’s 60-Second Science. I am Cynthia Graber



adj.光合的,促进光合作用的
  • In some plants photosynthetic products are stored in the form polyfructosans. 在有些植物中,光合作用产物是以多聚果糖的形式储藏。
  • Chlorotic or necrotic lesions were evidence of decreased photosynthetic tissues. 缺绿的或坏死的侵蚀斑便是减少了光合组织的证据。
n.光合作用
  • In apple trees photosynthesis occurs almost exclusively in the leaves.苹果树的光合作用几乎只发生在叶内。
  • Chloroplasts are the structures in which photosynthesis happens.叶绿体就是光合作用发生的地方。
n.催化剂,造成变化的人或事
  • A catalyst is a substance which speeds up a chemical reaction.催化剂是一种能加速化学反应的物质。
  • The workers'demand for better conditions was a catalyst for social change.工人们要求改善工作条件促进了社会变革。
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学英语单词
absence of convection
acute interstitial nephritis
adjacent square
advance refunding
algae toxin
antithetic alternation of generations
ap-
Asian Games
azoic dyes insoluble azo dyes
bastard -sawing
beginning tape label
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blood fluid
brautigan
bretschneideri
brucitite
CAOCL
capital section
chaetodons
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characteristic of criminal1
cheliks
coifless
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CP-14445-16
creme caramel
data reconstitution
ddrmodes
dependovirus waterfowl parvovirus infection
expansion gage
facilizing
Financial Danger
flush filled joint
flying by
footstep-bearing
gain attributable to depreciation
guffawing
hablador
irregularity index
isochrons
lavaliere microphone
Lind, Jenny
linty
lytic necrosis
MacCarthy I.
magnetic plug
mcluskie
metasomatic lead-zinc deposit in carbonate rock
microvolume
minimal normal subgroup
Mixtec
multi-arch
narendras
optical pair
pasture ripper
penguelly
Pentastomida
perisperms
pick-up cartridge
Pitea
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port town
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pulses per miles
rammelsberg
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recursive-subranging converter
refrayne
relationship between superior and subordinate
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Reverend Mother
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tradon
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type of connection
valerce
value at segment end point
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vinegar bottle
vingaker danseu (sweden)
walkin'
Wharfside Workers Federation
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withfall