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空间站太干净不利于宇航员健康
#国际空间站

我们总是习惯性地认为,应该把居住环境弄得更加洁净。但最新研究发现,国际空间站的无菌状态可能对宇航员健康产生负面影响,专家建议适当“增加微生物多样性”。研究表明,空间站内基本缺乏土壤和水中常见的环境微生物,而这些微生物被认为对人体免疫系统有益。微生物多样性的缺失或许能解释宇航员为何常受皮疹、唇疱疹、真菌感染和带状疱疹等免疫相关疾病的困扰。研究团队与宇航员合作,对空间站 803 个不同表面进行采样,所收集的样本数量是以往研究的 100 倍。随后这些样本被送回地球进行分析,以检测其中的细菌种类及化学物质。研究人员据此构建了三维“地图”,通过显示每个样本的采集位置,展示出细菌和化学物质之间可能的相互作用。结果显示,虽然空间站各区域微生物组成存在差异,比如餐饮区富含食物相关菌群,卫生间则以排泄物相关菌种为主,但总体上人体皮肤仍是最主要的微生物来源。与地球样本相比,空间站表面显著缺乏土壤和水中常见的自由生存环境微生物。研究还发现,清洁剂和消毒剂成分在空间站内广泛存在。数据显示,国际空间站的微生物环境更接近医院等工业化隔离场所的样本特征。
Cell:The International Space Station has a unique and extreme microbial and chemical environment driven by use patterns
空间站“太干净”不利于健康



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空间站太干净不利于宇航员健康
#国际空间站

我们总是习惯性地认为,应该把居住环境弄得更加洁净。但最新研究发现,国际空间站的无菌状态可能对宇航员健康产生负面影响,专家建议适当“增加微生物多样性”。研究表明,空间站内基本缺乏土壤和水中常见的环境微生物,而这些微生物被认为对人体免疫系统有益。微生物多样性的缺失或许能解释宇航员为何常受皮疹、唇疱疹、真菌感染和带状疱疹等免疫相关疾病的困扰。研究团队与宇航员合作,对空间站 803 个不同表面进行采样,所收集的样本数量是以往研究的 100 倍。随后这些样本被送回地球进行分析,以检测其中的细菌种类及化学物质。研究人员据此构建了三维“地图”,通过显示每个样本的采集位置,展示出细菌和化学物质之间可能的相互作用。结果显示,虽然空间站各区域微生物组成存在差异,比如餐饮区富含食物相关菌群,卫生间则以排泄物相关菌种为主,但总体上人体皮肤仍是最主要的微生物来源。与地球样本相比,空间站表面显著缺乏土壤和水中常见的自由生存环境微生物。研究还发现,清洁剂和消毒剂成分在空间站内广泛存在。数据显示,国际空间站的微生物环境更接近医院等工业化隔离场所的样本特征。
Cell:The International Space Station has a unique and extreme microbial and chemical environment driven by use patterns
空间站“太干净”不利于健康

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Telegram auto-delete message, expiring invites, and more

elegram is updating its messaging app with options for auto-deleting messages, expiring invite links, and new unlimited groups, the company shared in a blog post. Much like Signal, Telegram received a burst of new users in the confusion over WhatsApp’s privacy policy and now the company is adopting features that were already part of its competitors’ apps, features which offer more security and privacy. Auto-deleting messages were already possible in Telegram’s encrypted Secret Chats, but this new update for iOS and Android adds the option to make messages disappear in any kind of chat. Auto-delete can be enabled inside of chats, and set to delete either 24 hours or seven days after messages are sent. Auto-delete won’t remove every message though; if a message was sent before the feature was turned on, it’ll stick around. Telegram’s competitors have had similar features: WhatsApp introduced a feature in 2020 and Signal has had disappearing messages since at least 2016.

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