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金星云层中水活性太低不足以维持生命
发布时间:2021-06-29     作者:张梦然   来源:科技日报   分享到:

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  “jinxingshengming”cunzaidekenengxing,shiquniantianwenxuezuishouzhumuqiezuifuzhengyixingdehuati。xianzai,tianwenxuejiadejielunkenengrangbufenren“sixin”——juyingguo《ziran·tianwenxue》zazhi28rifabiaodeyixiangzuixinyanjiubiaoming,jinxinghetaiyangxizhongdaduoshuxingxingdeyunzhongshuifenxiangduikeyongxingtaidi,jishishiyijingshiyingdiqiujiduanhuanjingdeshengmingtiyenanyicunxu。zheiyifaxianyibiaoming,daduoshuyongyouyuncengdexingxinghuanjingdoubuliyuwomenyizhideshengming,danxiangguanyanjiukebangzhusuoxiaodiwaishengmingsouxunfanwei。

  zai2020nian9yue,yixiangzhongbangxingxingkexueyanjiufabu:yingguokexuejiashouciyujinxingdaqizhongtancedaolelinhuaqingqiti。dangshituanduirenweizheiyifaxiankeyibiaomingjinxingshangcunzaiweizhideguanghuaxuehuodiqiuhuaxueguocheng,dantancedaolinhuaqingshangwufazuoweicunzaiweishengwushengmingdeyoulizhengju。

  buguo,yebunengwanquanpaichuweishengwucunzaidekenengxing,erqiezaidiqiushang,linhuaqingbeirenweishiyouyanyangshengwuchanshengdeqiti,yincizaixuduohouxutaolunzhong,“jinxingshengming”yicibeitichubingdafanweitaolun。bujiu,quanshijiedoubamuguangtouxiangzheikelinjinxingxing,youduozukexuetuanduijiangtamenzaidiqiuhetaikongdeyiqizhuanxiangjinxing,xiwanglvxianquedingzheishifouyushizheshengmingdekeneng。

  kexuejiamenrenwei,“shuihuoxing”(water activity)yi0—1defanweijiliang,dengtongyuxingxingdaqizhongdexiangduishiduhuoshuifenkeyongxing。huanjingzhongdeshuihuoxingduishengwuyingxiangjida,baokuoshenghuozaijiduanhuanjingzhongchengweishijijundeshengwu。shiyanshiyanjiubiaoming,shengmingxuyaozhishao0.585deshuihuoxingcainengjinxingdaixiehefanzhi。

  jianyuci,baokuoyingguobeierfasitenvwangdaxueyanjiurenyuanzaineidetuanduixiangxijisuanlejinxingheqitataiyangxixingxingyuncengneishuihuoxingduishengmingdexianzhi。tamenfaxian,liusuanyedijiangjinxingyuncengneishuihuoxingjiangdidaole0.004yixia,budaoshengmingjixiansuoxude1/100。xiangbizhixia,huoxingyunlideshuihuoxingshi0.537,zhilvediyushengmingyijufanwei,jiejindiqiudiercengdaqijipingliuceng。buguodiqiudaqicengzuidideyicengjiduiliucengshishiyishengmingde。

  fenxihaixianshi,muxingdaqideshuihuoxingyunxushengmingcunzai,gaoyu0.585,qiwenzai-10℃—40℃jian,danyundezuchengchengfendengyinsuxianzhileqiyijuxing。

  yanjiurenyuanzuihouzongjiebiaoshi,zheixiangyanjiuyongdaodefangfa,yekeyingyongyuquedingtaiyangxiwaidexingxingdaqishuihuoxing,congerbangzhurenleisuoxiaodiwaishengmingsouxundefanwei。

【womenzunzhongyuanchuang,yezhuzhongfenxiang。banquanyuanzuozhesuoyou,ruyouqinfannindequanyiqingjishilianxi,womenjiangdiyishijianshanchu。fenxiangneirongbudaibiaobenwangguandian,jingongcankao。】

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