电子鼻能用来鉴定水果成熟度
文章来源:未知 文章作者:enread 发布时间:2012-04-02 06:12 字体: [ ]  进入论坛
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Have you ever been disappointed by a cantaloupe(哈密瓜,香瓜) from the grocery store? Too ripe? Not ripe enough? Luckily for you, researchers from the University of California, Davis might have found a way to make imperfectly ripe fruit a thing of the past. The method will be published on March 30 in the Journal of Visualized1 Experiments (JoVE).

"We are involved in a project geared towards developing rapid methods to evaluate ripeness and flavour of fruits," said paper-author Dr. Florence Negre-Zkharov. "We evaluated an electronic nose to see if it can differentiate2 maturity3 of fruit, specifically melons. The goal is to develop a tool that can be used post-harvest to better evaluate produce, and develop better breeds."

When fruit ripens4, it develops a characteristic volatile5 blend, indicating its maturity. Traditionally, the gold-standard of evaluating these volatiles has been gas chromatography, but it takes up to an hour to analyze6 a single sample, which makes it impractical7 to use outside the lab. Dr. Negre-Zakharov and her team wanted to determine if the much cruder -- but much faster -- electronic nose was able to determine if the melon they used in the experiment were ripe. It was.

"It's quite encouraging technology for the purposes of determining maturity," she said.

The project is part of the Specialty8 Crops Research Initiative, funded by the United States Department of Agriculture, which was "established to solve critical industry issues through research and extension activities." Dr. Negre-Zkharov and her team are working on quantitative9 methods of evaluating fruit-ripeness in the hopes that it will help the industry produce better quality produce.

"It's very impressive that the electronic nose system can do a type of gas chromatography in about a minute. Ultra-fast, indeed. Also, the sample preparation is as easy as making a smoothie(举止优雅的人) at home. Such a user-friendly system could greatly help analysis efficiency in this field," said JoVE Science Editor, Dr. Zhao Chen. "Given the popularity of JoVE video-articles, I expect many researchers will know and adopt this method in their own research."

Since the very nature of the project is to give people useful tools, the researchers decided10 to publish in JoVE, the only peer reviewed, PubMed-indexed science journal to publish all of its content in both text and video format11.

"We thought that the best way to get people to adopt the method was showing a video, instead of publishing a text," said Dr. Negre-Zkharov.

The next step is to take the electronic nose out into the field to determine if it can still determine fruit maturity with all of the background smells interfering12 -- like soil and air-quality. Though the team has already tested the device in the field, they have not yet analyzed13 their results.



点击收听单词发音收听单词发音  

1 visualized 052bbebb5da308bd361d83e229771079     
直观的,直视的
参考例句:
  • I had visualized scientists as bearded old men. 我曾经把科学家想像成长满胡子的老人。
  • "I visualized mangled and inadequate branches for my fires. 我想像中出现了砍得乱七八糟的树枝子,供不上壁炉烧的。 来自名作英译部分
2 differentiate cm3yc     
vi.(between)区分;vt.区别;使不同
参考例句:
  • You can differentiate between the houses by the shape of their chimneys.你可以凭借烟囱形状的不同来区分这两幢房子。
  • He never learned to differentiate between good and evil.他从未学会分辨善恶。
3 maturity 47nzh     
n.成熟;完成;(支票、债券等)到期
参考例句:
  • These plants ought to reach maturity after five years.这些植物五年后就该长成了。
  • This is the period at which the body attains maturity.这是身体发育成熟的时期。
4 ripens 51963c68379ce47fb3f18e4b6ed340d0     
v.成熟,使熟( ripen的第三人称单数 )
参考例句:
  • The sun ripens the crops. 太阳使庄稼成熟。 来自《简明英汉词典》
  • Then their seed ripens, and soon they turn brown and shrivel up. 随后,它们的种子熟了,不久就变枯萎。 来自辞典例句
5 volatile tLQzQ     
adj.反复无常的,挥发性的,稍纵即逝的,脾气火爆的;n.挥发性物质
参考例句:
  • With the markets being so volatile,investments are at great risk.由于市场那么变化不定,投资冒着很大的风险。
  • His character was weak and volatile.他这个人意志薄弱,喜怒无常。
6 analyze RwUzm     
vt.分析,解析 (=analyse)
参考例句:
  • We should analyze the cause and effect of this event.我们应该分析这场事变的因果。
  • The teacher tried to analyze the cause of our failure.老师设法分析我们失败的原因。
7 impractical 49Ixs     
adj.不现实的,不实用的,不切实际的
参考例句:
  • He was hopelessly impractical when it came to planning new projects.一到规划新项目,他就完全没有了实际操作的能力。
  • An entirely rigid system is impractical.一套完全死板的体制是不实际的。
8 specialty SrGy7     
n.(speciality)特性,特质;专业,专长
参考例句:
  • Shell carvings are a specialty of the town.贝雕是该城的特产。
  • His specialty is English literature.他的专业是英国文学。
9 quantitative TCpyg     
adj.数量的,定量的
参考例句:
  • He said it was only a quantitative difference.他说这仅仅是数量上的差别。
  • We need to do some quantitative analysis of the drugs.我们对药物要进行定量分析。
10 decided lvqzZd     
adj.决定了的,坚决的;明显的,明确的
参考例句:
  • This gave them a decided advantage over their opponents.这使他们比对手具有明显的优势。
  • There is a decided difference between British and Chinese way of greeting.英国人和中国人打招呼的方式有很明显的区别。
11 format giJxb     
n.设计,版式;[计算机]格式,DOS命令:格式化(磁盘),用于空盘或使用过的磁盘建立新空盘来存储数据;v.使格式化,设计,安排
参考例句:
  • Please format this floppy disc.请将这张软盘格式化。
  • The format of the figure is very tasteful.该图表的格式很雅致。
12 interfering interfering     
adj. 妨碍的 动词interfere的现在分词
参考例句:
  • He's an interfering old busybody! 他老爱管闲事!
  • I wish my mother would stop interfering and let me make my own decisions. 我希望我母亲不再干预,让我自己拿主意。
13 analyzed 483f1acae53789fbee273a644fdcda80     
v.分析( analyze的过去式和过去分词 );分解;解释;对…进行心理分析
参考例句:
  • The doctors analyzed the blood sample for anemia. 医生们分析了贫血的血样。 来自《简明英汉词典》
  • The young man did not analyze the process of his captivation and enrapturement, for love to him was a mystery and could not be analyzed. 这年轻人没有分析自己蛊惑著迷的过程,因为对他来说,爱是个不可分析的迷。 来自《简明英汉词典》
TAG标签: nose maturity fruit
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