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Scientists Reveal How Mosquitoes Are Able to Smell Humans Even Without Antennae_我的网站
A | 炒股就看金麒麟分析师研报，权威，专业，及时，全面，助您挖掘潜力主题机会！ 来源：IPO日报 8月24日晚间，建设机械（600984.SH）发布公告称，公司拟通过发行股份及支付现金的方式购买陕西化工集团、三峡资本合计持有的蒲城清洁能源化工有限责任公司（以下简称“蒲洁能化”）100%股权，发行股份购买资产的价格定为3.03元/股。
B | 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。 同时，公司拟向不超过35名特定投资者发行股份募集配套资金，用于支付现金对价、补充流动资金等。 8月25日，公司复牌“一字”涨停，收盘价为4.94元。然而8月26日，公司股价高台跳水，收盘价为4.66元，较昨日下跌0.28元，跌幅为‑5.67%。 值得一提的是，在停牌前一个交易日8月10日，公司已经收获一个涨停。 跨界收购 因本次交易的交易对方之一陕西化工集团为陕煤集团控股子公司，与上市公司属同一控制下的关联方，因此本次交易构成关联交易。同时，本次交易亦构成重大资产重组。 据悉，标的公司蒲洁能化是一家现代煤化工企业，主要从事聚乙烯（PE）、聚丙烯（PP）等聚烯烃产品的生产与销售。公司拥有年产180万吨甲醇制70万吨聚烯烃的生产能力。 本次交易前，上市公司主营业务为工程机械租赁与制造，标的公司主要从事现代煤化工业务，与上市公司现有业务分属不同行业。
C | 也即是说，本次收购为跨界收购，上市公司将涉足新领域。
D | 财务数据方面，2024—2025年以及2026年上半年，标的公司实现的营业收入分别为83.56亿元、75.97亿元、43.7亿元，净利润分别为59754.89万元、8112.12万元、29985.62万元。
E | 可以看出，标的公司的净利润波动较大，2025年同比下滑超过86%。 标的公司曾于2024年度对股东全部权益价值进行评估，评估基准日为2024年6月30日，采用收益法评估结果为97.58亿元，评估增值2.52亿元，增值率2.66%。 截至预案签署日，标的公司的审计、评估工作尚未完成，标的资产评估值及交易作价均尚未确定。 面临退市风险 据悉，建设机械是国内知名的工程机械企业，其子公司上海庞源机械租赁有限公司是全球最大的塔式起重机租赁商。然而，近年来受工程机械行业景气度持续下行等因素影响，公司经营承受较大压力，已连续多年出现亏损。
F | 公告显示，建设机械自2022年起已连续四年亏损，2025年度亏损21.96亿元，2025年末净资产31.22亿元。若经营状况未能改善，企业持续亏损，未来将面临退市风险。因此公司亟需注入盈利能力稳定、现金流充沛的优质资产，以扭转当前经营困局、化解退市风险。
G | 建设机械指出，通过注入蒲洁能化这一优质化工资产，利用其稳定的盈利能力和充足的净资产规模，能够显著增厚上市公司净资产，有效对冲现有业务的持续亏损，避免因净资产为负触发退市风险，从根本上保障上市公司持续经营能力与资本市场地位。 同时，本次重组后，上市公司短期内将形成“装备制造+现代煤化工”双主业协同发展模式。
H | 本次交易实施完毕后，上市公司将全面聚焦煤化工核心主业，逐步调整业务结构，未来将择机对装备制造及租赁业务进行剥离处置，实现主业专业化、集中化。责任编辑：杨红卜。
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