SSS 2011-02-14
时间：2019-01-08 作者：英语课 分类：Scientific American(二)月
Imagine Van Gogh's paintings of yellow sunflowers. Now imagine the flowers brown. Eh, not so good. Sadly, we may someday see what that would look like. Because the bright yellow paints on the canvas are slowly turning muddy. Now, an international team of scientists has pinpointed 1 the chemical reaction that drives this degradation—the first step toward stopping it. Their findings appear in the journal Analytical 2 Chemistry.
Van Gogh's use of strong bright colors to convey mood and emotion marks a major milestone 3 in art history. And his Sunflower series wouldn't be the same without the vibrant 4 "chrome yellow" pigment 5 that was new at the time. But this color darkens when exposed to the sun.
To find out why, researchers used x-ray analyses to determine the exact chemical composition of the paint as it browns. First, they exposed three tubes of chrome yellow to UV radiation until one turned a chocolate color. Analyzing 6 that sample, they identified specific changes in the paint's chromium compounds. They then found the same chemical signature in the darkened areas of two van Gogh paintings. Until a chemical antidote 7 is found, the researchers have some ironic 8 advice: keep sunlight away from van Gogh's sunflowers.
"Flaming flowers that brightly blaze. Swirling 9 clouds in violet haze 10."
Thanks for the minute. For Scientific American's 60-Second Science, I'm Karen Hopkin.
"Reflect in Vincent's eyes of china blue. Colors changing hue 11..."
- His refusal to help simply pinpointed his cowardice. 他拒绝帮助正显示他的胆小。
- Computers pinpointed where the shells were coming from. 计算机确定了炮弹发射的位置。
- I have an analytical approach to every survey.对每项调查我都采用分析方法。
- As a result,analytical data obtained by analysts were often in disagreement.结果各个分析家所得的分析数据常常不一致。
- The film proved to be a milestone in the history of cinema.事实证明这部影片是电影史上的一个里程碑。
- I think this is a very important milestone in the relations between our two countries.我认为这是我们两国关系中一个十分重要的里程碑。
- He always uses vibrant colours in his paintings. 他在画中总是使用鲜明的色彩。
- She gave a vibrant performance in the leading role in the school play.她在学校表演中生气盎然地扮演了主角。
- The Romans used natural pigments on their fabrics and walls.古罗马人在织物和墙壁上使用天然颜料。
- Who thought he might know what the skin pigment phenomenon meant.他自认为可能知道皮肤色素出现这种现象到底是怎么回事。
- Analyzing the date of some socialist countries presents even greater problem s. 分析某些社会主义国家的统计数据，暴露出的问题甚至更大。 来自辞典例句
- He undoubtedly was not far off the mark in analyzing its predictions. 当然，他对其预测所作的分析倒也八九不离十。 来自辞典例句
- There is no known antidote for this poison.这种毒药没有解药。
- Chinese physicians used it as an antidote for snake poison.中医师用它来解蛇毒。
- That is a summary and ironic end.那是一个具有概括性和讽刺意味的结局。
- People used to call me Mr Popularity at high school,but they were being ironic.人们中学时常把我称作“万人迷先生”，但他们是在挖苦我。
- Snowflakes were swirling in the air. 天空飘洒着雪花。 来自《现代汉英综合大词典》
- She smiled, swirling the wine in her glass. 她微笑着，旋动着杯子里的葡萄酒。 来自辞典例句
- I couldn't see her through the haze of smoke.在烟雾弥漫中，我看不见她。
- He often lives in a haze of whisky.他常常是在威士忌的懵懂醉意中度过的。