孤岛惊魂
Scientists Reveal How Mosquitoes Are Able to Smell Humans Even Without Antennae_我的网站
A | 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。 湖人砸出4年5200万美元引进马穆，这份合同堪称“今夏最具争议”。很多人并不了解马穆，最近马穆回到国家队，轻取20分帮格鲁吉亚在热身赛以101-90战胜了以色列。
B | 马穆刚刚参加完卢卡·东契奇在斯洛文尼亚举办的洛杉矶湖人迷你训练营，他马不停蹄与国家队会和。在与以色列的热身赛，上半场格鲁吉亚的明星组合掌控了内线节奏，比塔泽早早得到12分，马穆贡献11分。下半场演变成一场势均力敌的拉锯战，比分多次交替领先。比赛一直悬而未决，直到关键时刻，格鲁吉亚打出一波决定性的8-0攻势，建立了不可逾越的11分优势，锁定胜局。 马穆全场得到20分，欧洲媒体夸赞他“展示了全能的内外线技术”。 这场友谊赛是两国在2027年FIBA世界杯预选赛第二阶段也是最后阶段前的热身赛。格鲁吉亚以3胜3负的战绩进入欧洲区预选赛I组，距离晋级席位仅差一个胜场。相反，以色列以2胜4负的战绩进入K组，落后前三名三个胜场。 上赛季，在为猛龙出战的80场比赛，马穆场均轰下11.2分、4.9个篮板、1.9次助攻，投篮命中率52.3%，三分命中率38.9%。 马穆在国际赛场的表现一向非常出色，2023年男篮世界杯格鲁吉亚对阵斯洛文尼亚，东契奇狂轰34分、10篮板、6助攻，马穆则拿下全队最高的21分、7篮板。
C | 如果马穆能延续他在国际赛场的表现，湖人这笔签约可能回报很高。
Current article:http://jtxd.cengzaodengchawonin.cyou/list_jp8h4/jro1a39.html
Published on:00:00:00