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:
★ 【优化方案】2017届高考英语二轮复习全国卷Ⅱ规范练:6(含解析)
★ 【课堂新坐标】2017届高考英语(通用版)二轮复习书面表达专题训练:Ⅱ卷强化增分练 训练4(含解析)
★ 【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
★ 河南省三门峡市2014高考英语一轮(暑假)基础训练(8)附答案
★ 【人教版】2014届高考英语一轮复习指导考点针对练:选修6 unit3《A healthy life》
★ 【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》
★ 安徽省淮南市2014高考英语一轮单项选择及文章训练(9)及答案
最新
2017-04-24
2017-04-24
2017-04-24
2017-04-24
2017-04-21
2017-04-21