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New Study Reveals We Have One Thing to Thank Gonorrhea For_我的网站

A |     Researchers from the University of California's San Diego School of Medicine have found that gonorrhea, as unpleasant as it is, might be the reason that our grandparents even exist.,Humans are among the few species that continue to live after menopause, which might be because of the evolution-proven support that older women provide when it comes to raising children.,The new findings suggest that pressure from pathogens like gonorrhea developed human gene mutations that protected elderly people from cognitive decline and made sure they could live longer.,The discovery comes by comparing human and chimpanzee genomes. The comparison revealed that humans have their own unique version of the gene for CD33, a receptor in immune cells that plays an important role in binding to a type of sugar called sialic acid. Human cells are coated with it and it helps immune cells "recognize" other cells and not attack them.,"Somewhere along the evolutionary line, humans picked up an additional mutated form of CD33 that is missing the sugar-binding site," the authors said. "The mutated receptor no longer reacts to sialic acids on damaged cells and plaques, allowing the microglia to break them down. Indeed, higher levels of this CD33 variant were independently found to be protective against late-onset Alzheimer's.",It would seem that CD33 was selected by evolution for its survival advantages, later making sure that humans were able to have big families that represent several generations. All of this, albeit indirectly, thanks to gonorrhea.。

B |     入伏以来，杭州持续开启“烧烤模式”，城市用水量节节攀升。

C | 数据显示，7月6日至8月4日，杭州市水务集团一体化服务保障范围日均用水量为461.82万吨，而7月30日的最高日用水量达到485.84万吨，为今夏迄今最高。

D | 用水量节节攀升，供水会不会吃紧？记者昨天了解到，根据气象信息并结合往年夏季的供水情况，市水务集团预计今夏日最高用水量为495万吨，而市水务集团的日供水能力可达657.10万吨，完全能够满足城市用水需求。这份安心的背后，是市水务集团不断推进原水工程、制水厂及供水管线建设，持续优化制水工艺的坚实守护。

E | 随着杭州第二水源输水通道江南线的建成通水，钱塘江南岸的滨江水厂、萧山第二水厂、第三水厂、江东水厂、南片水厂等水厂实现了千岛湖原水通水，结束了长期以来依赖钱塘江单一水源的供水历史，双水源保障极大提升了夏季原水取水可靠性和供水保障能力。另外，江南水厂改扩建工程净水工程（水厂部分）正式通水运行，进一步强化了富阳全区的供水安全保障能级。市水务集团也在持续推进区域供水管网互联互通建设。比如，在萧山区完成了亚太路DN（公称直径）1000管与时代大道DN800管、湘湖金沙DN1000管联通工作，成功实现湘湖区块由第三水厂供水切换至南片水厂供水，充分利用南片水厂富余产能，有效提升供水管网互联互通水平；同时完成进化大岩山主管、浦阳尖湖村主管、新塘新螺路主管以及闻堰区域4条老旧管网改造工程，大幅提升区域供水保障能力与水质水压稳定性。

F | 在制水工艺提升方面，今年5月闲林水厂二氧化碳投加项目投入运行，有效提升对碱性较强原水的处理能力，余杭区径山水厂、仁和水厂以及临安区太湖源水厂的臭氧项目投运，则有效提升水质安全性。

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