Results 21 to 30 of about 232,383 (164)

Risk assessment and prevention and control strategy of infection and infectious diseases (传染与感染性疾病感控风险评估与防控策略)

open access: yes中西医结合护理, 2023
The risk assessment of infection and infectious diseases control is a very important part of public health control. The large population base has placed an enormous burden on prevention and control of infection and infectious diseases in China.
MA Jinghan (马菁浛)   +6 more
doaj   +1 more source

Flexible, Robust Transparent Conductive Films With Excellent Electromagnetic Shielding Properties

open access: yesRare Metals, Volume 45, Issue 8, August 2026.
ABSTRACT Transparent conductive films (TCFs) are indispensable components for next‐generation wearable electronics, intelligent robots, and electromagnetic interference (EMI) shielding devices. However, the fabrication of conventional random metallic mesh suffers from an inherent trade‐off between “randomness and controllability”.
Shanghao Lu   +5 more
wiley   +1 more source

空间高能质子及重离子诱导的DNA损伤模拟计算

open access: yesHe jishu
采用蒙特卡罗方法模拟辐射诱导DNA损伤过程,通过获得的细胞水平数字化损伤产额评估空间辐射环境生物学效应。基于空间环境中的主要辐射来源,结合蒙特卡罗损伤模拟程序(Monte Carlo Damage Simulation,MCDS),首先针对单能状态下的质子、氦离子、碳离子、氧离子、硅离子和铁离子设置了10~105 MeV不等间隔的5个能量点,同时选择典型太阳质子事件能谱以及太阳极小时和极大时银河宇宙射线中的主要粒子能谱作为辐射源项代表,分别进行了DNA双链断裂(Double Strand Breaks ...
齐 婕, 闫 庆倩
doaj   +1 more source

The analysis of decalin pyrolysis property under supercritical conditions(十氢萘的超临界裂解性能分析)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2014
以十氢萘为吸热型碳氢燃料的模型化合物,研究其在550~610 ℃和0. 1~3. 5 MPa条件下的热裂解过程. 实验表明:不同温度(特别是相对较高的590和610 ℃)下,十氢萘在0. 1~2. 0 MPa压力下的转化率增加较为显著;十氢萘热裂解的主要气体产物有甲烷、乙烷、乙烯、丙烷、丙烯和碳原子数大于3的组分(C3+)等;在相同温度条件下,甲烷、乙烯的含量随压力增加而降低;乙烷、丙烷、丙烯和C3+的含量随压力增加而增加.裂解的气相产物中烯烃含量随温度升高而降低.液相产物主要包括环戊烷类、环戊烯类 ...
XINGYan(邢燕)   +2 more
doaj   +1 more source

Drivers of bat researchers’ intent to adopt field hygiene practices

open access: yesConservation Biology, Volume 40, Issue 4, August 2026.
Abstract Infectious disease is a growing threat to wildlife, with zoonotic transmission most likely at the human–wildlife interface. One underappreciated activity at this interface is fieldwork with wild animals, but associated risks can be mitigated through field hygiene (FH) practices, such as using personal protective equipment and other appropriate
Joanna L. Coleman   +6 more
wiley   +1 more source

多功能防疫裝置

open access: yes, 2022
[[abstract]]本專題利用Arduino及手機APP程式設計出一套多功能的防疫裝置,具備消毒與計數等功能,可裝設在入口處,適合現在的防疫需求。消毒裝置利用紅外線感測元件偵測是否有人員通過,如果有的話,就啟動酒精噴灑裝置,同時利用四位數七段顯示器顯示通過人數。為了進行遠端監控,也可透過手機APP程式來進行人員計數,可有效掌控現場人數,控制人數符合場地的防疫規定 ...
鐘天興   +3 more
core  

Large Cation‐Induced Lattice Distortion in Carbon‐Based High‐Entropy Oxides: Spin‐State Engineering and Broadband Microwave Absorption

open access: yesRare Metals, Volume 45, Issue 7, July 2026.
ABSTRACT High‐entropy oxides (HEOs) are promising for microwave absorption but suffer from a trade‐off between impedance matching and attenuation, often requiring high filling ratios (> 50 wt%). Herein, we propose a “lattice‐spin” dual‐regulation strategy by introducing giant‐radius Bi into a single‐phase HEO solid solution.
Junwei Zhang   +11 more
wiley   +1 more source

河北省市售植物油中氯丙醇酯污染状况及人体暴露评估Contamination level and exposure assessment of chloropropanol esters in vegetable oils sold in Hebei Province

open access: yesZhongguo youzhi
旨在为河北省食品安全风险监测工作提供数据基础,对河北省市售食用植物油中3-氯丙醇酯(3-MCPDE)及2-氯丙醇酯(2-MCPDE)的污染状况进行调查分析,并开展不同人群风险暴露评估。在河北省11个地市采集6种食用植物油样品共145份,以同位素稀释-气相色谱-质谱联用法对3-MCPDE和2-MCPDE进行定量,并采用目标危害系数法对河北省2~3岁、4~6岁、7~10岁、11~17岁、18~29岁、30~44岁、45~59岁、60~69岁、70岁及以上人群经食用植物油摄入氯丙醇酯的风险进行评估。结果表明 ...
刘印平, 云鹏, 陈福尊, 董彬, 杨立新LIU Yinping,YUN Peng, CHEN Fuzun, DONG Bin,YANG Lixin
doaj   +1 more source

Insights Into High‐Temperature Mechanical Properties and Oxidation Behavior of Ta‐Optimized TiAl‐Based Alloys Additively Manufactured via Directed Energy Deposition

open access: yesRare Metals, Volume 45, Issue 6, June 2026.
ABSTRACT Directed energy deposition (DED) is an effective method to process complex components with high efficiency, owing to its significant advantage of material saving and features of microarea metallurgy and rapid solidification. This study presents a nano‐Ta‐optimized Ti‐45Al‐8Nb (at%)‐based alloy synthesized via DED. The prepared TiAl‐based alloy
Yi Song   +8 more
wiley   +1 more source

饮用水中全氟和多氟烷基物质的污染特征及管控

open access: yesJingshui jishu
【目的】全氟和多氟烷基物质(PFASs)被广泛应用于各种工业产品和日常消费品中,已成为受到广泛关注的持久性有机污染物。环境水体中已普遍检出PFASs,人体通过饮水摄入是PFASs主要暴露途径之一,开展饮用水中PFASs赋存特征研究对于PFASs的防控至关重要。【方法】本文论述了PFASs的种类,除了包含全氟烷基羧酸(PFCAs)和全氟烷基磺酸(PFSAs)两大类传统PFASs外,还包含了新型PFASs的典型类别,并从直接排放和间接迁移两方面,对饮用水中PFASs的污染来源进行分析 ...
Yongyan CHEN   +5 more
doaj   +1 more source

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