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Crewed Mission to Mars May Be Exposed to Unsafe Levels of Radiation, Study Warns_我的网站

一 |     AI摘要      晋江市市场监管局约谈71家市场开办方，强化食用农产品全链条管控，推行快检全覆盖、追溯全录入，严查时令食品非法添加，压实“菜篮子”安全第一责任，筑牢源头防线。    While scientists and science fiction authors alike have long dreamed of sending crewed missions to Mars, a new study suggests these plans may hit a snag – a big one.,The authors of a yet to be peer-reviewed study argue that the participants of such a mission to Mars would end up being exposed to radiation – namely, to “energetic charged particles from Galactic and Solar origin” – both while in transit and while on the planet itself, with the “thin spacecraft shield” and “rarefied Martian atmosphere” offering little in the way of protection.,The research team attempted to gauge the impact of a simulated 1,000-day mission to Mars on various organs of the human body, and concluded that astronauts may be exposed to radiation doses above one Sievert, which is over the safe limit set by most space agencies, New Scientist points out.,“We suggest mitigation strategies such as improved ways of shielding and dietary supplements, and make recommendations for the safety of astronauts in future crewed missions to Mars,” the team wrote in the abstract of their work available on the arXiv preprint server.,Ideas about how astronauts may be protected from radiation during a mission to Mars have already been proposed, such as the concept of a radiation shield comprised of a fungus found growing at the Chernobyl Nuclear Power Plant.,Last year, one architecture studio even unveiled a project for a self-sufficient and sustainable city that would be built on the red planet itself.。         为进一步压紧压实市场开办者食品安全第一责任人职责，近日，晋江市市场监管局各市场监管所组织辖区集中交易市场开办单位负责人召开专题行政指导约谈会，系统部署食用农产品全链条管控工作，精准防范化解“菜篮子”食品安全风险隐患。    会上，执法人员对“菜篮子”食品安全守护行动工作方案核心条款进行逐项解读，同步宣贯省级食用农产品监管“十九条措施”，结合晋江三大源头农批市场实际，重点梳理当前市场普遍存在的主体责任落实虚化、快检拦截效能不足、追溯链条不完整、入场查验流于形式等短板，并通过剖析违法经营行为法律后果，为市场开办方明确划出食品安全经营“红线”，切实增强守法经营意识。    监管部门督促市场完善商户资质档案，与经营户签订农产品质量安全协议；严格查验进货凭证、承诺达标合格证、产品追溯信息，无合格凭证的农产品必须经市场快检合格后方可入场，同时健全索票索证、销售凭证全流程留存制度，确保来源可查、去向可追。要求批发市场配齐胶体金快检设备试剂，落实高风险品种批批快检、月度检测项目全覆盖。结合农贸市场点位分布，统筹设置“固定便民亭+流动快检车”检测资源，构建“定点+巡回”立体化快速筛查网络，实现靶向监管主动抽检与群众免费送检双向发力。让监管跑在风险前面。    此外，监管部门还紧盯杨梅、油柑、脆桃等时令水果非法添加甜味剂和防腐剂，牛蛙、泥鳅等水产使用禁限用兽药，活鱼添加麻醉剂等突出问题，开展“凌晨行动”“突击检查”，进行专项抽检131批次，同时开展“鲜果护安”专题快检1266批次，有效防范季节性品种风险，守护群众“果盘子”“鱼篓子”安全。

二 |     据统计，近期，晋江各市场监管所对辖区71家市场开办者进行集中提醒告诫，明确市场开办方是食用农产品安全第一道关口，指导各市场对照风险管控清单，细化内部管理制度，健全“日管控、周排查、月调度”制度，并在市场醒目位置公示快检结果、合规经营明白卡、肉制品经营告诫书，常态化开展场内商户食品安全培训。同时，压实批发市场经营主体追溯信息录入责任，确保追溯主体入驻率100%、信息录入率97%以上，真正实现“源头可溯、风险可控”。（融媒体记者 陈云青 通讯员 苏晓晖）。

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Published on:11:08:06