混乱特工又一起致命车祸，一人当场死亡_我的网站
一 | Mosquitoes use the body odor, heat, and carbon dioxide that humans emit, varying from person to person, to find their next meal. The study, which was published in the scientific journal Cell, reveals that mosquitoes may perceive odors via a variety of distinct pathways, in contrast to animals, which have a single set of neurons that detect each sort of odor.,Female mosquitoes use the variety of odors that people and other animals produce to find the blood that will feed their eggs. The olfactory neurons in the insects' antennae, which are where they take up scents, detect and send scent information to the brain.,Groups of human-odor receptors on the olfactory neurons in the antennae of female mosquitoes (Aedes aegypti) were rendered inactive by the study's lead author Meg Younger and her colleagues at Boston University in Massachusetts using the gene editing tool CRISPR.,"We found that there’s a real difference in the way mosquitoes encode the odors that they encounter compared to what we’ve learned from other animals,” Younger is quoted as saying in the Guardian report on the findings.,According to Younger, the scientists believed that mosquitoes would adhere to the core tenet of olfaction, which states that each neuron expresses only one type of receptor.,“Instead, what we’ve seen is that different receptors can respond to different odors in the same neuron," she added.,This reportedly suggests that mosquitoes can still detect human odors after losing one or more receptors. The researchers asserted that this backup system may have developed as a survival mechanism.,"The mosquito Aedes aegypti is specialized to bite humans, and it is believed that they evolved to do that because humans are always close to fresh water and mosquitoes lay their eggs in fresh water. We are basically the perfect meal, so the drive to find humans is extremely strong," Younger explained,In the end, the researchers argued, knowing how the mosquito brain perceives human odor could be used to influence biting behavior and stop the spread of diseases like malaria, dengue fever, and yellow fever that are transmitted by those insects.,"One major strategy for controlling mosquitoes is to attract them to traps to remove them from the biting population. If we could use this knowledge to understand how human odor is represented in the mosquito antennae and brain, we could develop blends that are more attractive to mosquitoes than we are. We could also develop repellants that target those receptors and neurons that detect human odor," Younger concluded.,Notably, Christopher Potter at Johns Hopkins School of Medicine in Maryland recently found a similar phenomenon in fruit flies, or Drosophila melanogaster.,“If one of these types of olfactory receptors is mutated or no longer functioning, there’s this backup system," Potter is quoted as saying in the New Scientist report. “It’s changing the dogma of what we thought we knew about the olfactory system.”,Science & TechSmell of Blood: Mosquitoes' Scent-Based Host-Seeking Mechanism Revealed16 May, 05:54 GMT。 Renee 编译 据1News报道，昨晚Mount Maunganui发生一起交通事故，造成一人不幸死亡。 Advertise with us 警方表示，他们于晚上10点17分左右被呼叫至Aerodrome Rd和Hewletts Rd交汇处的现场。 一人当场死亡，另一人受伤被送往医院。 对事故原因的调查仍在进行中。 这起车祸导致圣诞假期期间的道路事故死亡人数升至7人。 相关阅读： 圣诞假期道路死亡人数升至6人 惨不忍睹！刚刚过去的周末，6人因车祸而死 警方发布零容忍警告，节日期间将严查酒驾和超速 新西兰哪些地区车祸最多？哪些时间段最容易出事故？ 又一儿童因车祸丧生，假期中17人死于交通事故，创多年来新高 注：本文为编译/原创，欢迎转发分享；但严禁复制等未经授权的非法使用。违反上述声明者，本网将追究其相关法律责任。使用授权请联系[email protected]。 chineseherald.co.nz All Rights Reserved 版权所有 (责编：twinkle) 来源 - 相关内容 今年Boxing Day新西兰人花了多少钱？比去年少了… 奥克兰一处房屋发生火灾，一人丧生 圣诞假期道路死亡人数升至6人 Boxing Day购物真的更优惠吗？商场一早就挤满了人 快讯：Newmarket Westfield遭紧急疏散 奥克兰北岸发生“不明原因”死亡事件 恶劣天气持续，部分地区或遭暴雨雷暴袭击，最高温近30度 北部开始下雨了 奥克兰的圣诞节可能有阵雨。 Current article:http://www.rangzhuanhoujuedu.cyou/gw4r3/uixn.html Published on:16:06:21 |
