Now scientists have created a quick way to understand what plants are saying:　a chemical sensor(传感器) called an electronic nose. The“e-nose” can tell compounds that crop plants make when they’re attacked. Scientists say the e-nose could help quickly detect whether plants are being eaten by insects. But today the only way to detect such insects is to visually inspect individual plants. This is a challenging task for managers of greenhouses, enclosed gardens that can house thousands of plants.

　　The research team worked with an e-nose that recognizes volatile compounds. Inside the device, 13 sensors chemically react with volatile compounds. Based on these interactions, the e-nose gives off electronic signals that the scientists analyze using computer software.

　　To test the nose, the team presented it with healthy leaves from cucumber, pepper and tomato plants, all common greenhouse crops. Then the scientists collected samples of air around damaged leaves from each type of crop. These plants had been damaged by insects, or by scientists who made holes in the leaves with a hole punch(打孔器).

　　The e-nose, it turns out, could identify healthy cucumber, peper and tomato plants based on the volatile compounds they produce. It could also identify tomato leaves that had been damaged. But even more impressive, the device could tell which type of damage—by insects or with a hole punch—had been done to the tomato leaves.

【2017届云南省高考英语一轮复习训练：1】相关文章：

★ 【北师大版】2014届高考英语一轮复习指导课时作业：Unit 10 A卷 Word版含解析

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修1 unit3《Travel journal》

★ 【三维设计】2017届高考英语（江苏专用）二轮复习素材：高考单词2.背佳句记单词

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修2 unit4《Wildlife protection》

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修4 unit1《Women of achievement》

★ 重庆市2014高考英语阅读理解一轮（精品）训练题（2）附答案

★ 四川省广安市2014高考英语一轮基础训练题（3）及答案

★ 2017届云南省高考英语一轮复习训练：7

★ 【北京专用】2014届高考英语一轮复习方案课时作业：必修4 Unit 3 A taste of English humour

★ 河南省三门峡市2014高考英语一轮（暑假）基础训练（8）附答案