公立医院招标采购对学科建设的影响

学科建设是医院建设的基础和核心工程,是医院核心竞争力提升的必要条件,学科建设的提升需要高质量的物力配备作为条件支持,而招标采购作为医院运营管理机制的重要组成,在服务学科建设方面发挥着关键性的作用,招标采购质量直接作用着学科建设质量、进程、结果。该文从公立医院招标采购切入,探讨对医院学科建设的影响和需要改进的措施。     

大型方舱医院物资捐赠管理体系建设与应用

社会捐赠体系是国家应急物资保障的重要组成部分。物资捐赠作为疫情防控期间物资保障的一种重要形式和补充,其响应速度对解决疫情特殊时期医疗物资匮乏问题起到了至关重要的作用。该文通过在国家会展中心（上海）方舱医院物资捐赠管理工作实践中反复总结、积累实践,以分配公平性、效用优化性、信息透明性为目标,制定了大型方舱医院物资捐赠制度,创建了相关流程,形成了大型方舱医院物资捐赠管理体系,在确保国家会展中心（上海）方舱医院正常运行中发挥了重大作用。     

Physiologic Pulsatile Flow Bioreactor Conditioning of Poly(ethylene glycol)-based Tissue Engineered Vascular Grafts

Mechanical conditioning represents a potential means to enhance the biochemical and biomechanical properties of tissue engineered vascular grafts (TEVGs). A pulsatile flow bioreactor was developed to allow shear and pulsatile stimulation of TEVGs. Physiological 120 mmHg/80 mmHg peak-to-trough pressure waveforms can be produced at both fetal and adult heart rates. Flow rates of 2 mL/sec, representative of flow through small diameter blood vessels, can be generated, resulting in a mean wall shear stress of ∼6 dynes/cm² within the 3 mm ID constructs. When combined with non-thrombogenic poly(ethylene glycol) (PEG)-based hydrogels, which have tunable mechanical properties and tailorable biofunctionality, the bioreactor represents a flexible platform for exploring the impact of controlled biochemical and biomechanical stimuli on vascular graft cells. In the present study, the utility of this combined approach for improving TEVG outcome was investigated by encapsulating 10T-1/2 mouse smooth muscle progenitor cells within PEG-based hydrogels containing an adhesive ligand (RGDS) and a collagenase degradable sequence (LGPA). Constructs subjected to 7 weeks of biomechanical conditioning had significantly higher collagen levels and improved moduli relative to those grown under static conditions. These authors contributed equally to this work     

Nonlinear structural and material properties and models: The pulmonary trunk

General models are developed for static and dynamic geometric and material passive responses. The models are applied to data obtained from the main pulmonary arteries of calves and dogs. The structural model predicts distortions by simultaneous stretching and bending in a concise manner. Parameters are obtained by a fiveelement material model. This latter predicts static and dynamic, nonlinear, frequency-dependent, viscoelastic responses observed in biomaterials over the entire strain range irrespective of the nature of loading. Validity and baseline parameter values are investigated for the inactivated state, developed by poisoning the smooth muscle with potassium cyanide. Complexities, related to nonlinear (strain-dependent) and colloidal (thixotropic) properties of tissues, are analyzed. These properties enter into functional responses in a complex manner that can modify substantially concepts of material components and vary appreciably between physiologic circumstances and laboratory evaluations. We propose that, in general, evaluations of material responses must account for these properties.     

基于整合药理学的当归抗动脉粥样硬化的作用机制研究

目的基于整合药理学,研究当归抗动脉粥样硬化(Atherosderosis,AS)的作用机制。方法借助中药整合药理学平台(TCMIP V2.0),预测分析当归抗动脉粥样硬化的机制及其药效物质基础。结果当归抗动脉粥样硬化的17种有效成分,直接或间接作用于PPARG(过氧化酶体增殖物激活受体)、APOE(载脂蛋白E)、卵磷脂胆固醇酰基转移酶(LCAT)、炎性趋化因子(CCL2)、基质金属蛋白酶9(MMP9)、MTTP(微粒体三酰甘油转移蛋白)等26个核心药靶,这些药靶作用涉及胆固醇跨膜转运、胆固醇酯代谢、炎症反应、脂质氧化修饰、PPARα活性基因的表达等10条主要调控通路。结论可预测当归中部分有机酸和挥发油成分主要通过PPARG、MTTP靶标作用炎症及脂质代谢通路对抗AS的发生。     

COVID-19 Recession: Young Adult Food Insecurity,Racial Disparities,and Correlates

PurposeThe COVID-19 pandemic has inflicted devastating health, social, and economic effects globally. This study examines the experiences of young adults in the United States with respect to food insecurity during the pandemic and factors associated with higher and lower risk for young adult food insecurity.MethodsUsing the U.S. Census Bureau's Household Pulse Survey, a nationally representative survey collecting information on people's experiences throughout the pandemic, we analyzed prevalence of, and factors associated with young adult food insecurity during the pandemic.ResultsOverall, 13% of young adults aged 18–25 years reported often or sometimes not having enough to eat in the last 7 days at a given time during pandemic, on average, with Black and Hispanic young people facing higher rates of food insecurity (22% and 15%, respectively) than White non-Hispanic peers (11%). Over the observed pandemic period, we find a decline in food insecurity among young adults corresponding with economic policy actions. Factors associated with a higher risk of food insecurity include lower household income, expected job loss, renting as opposed to owning housing, behind on rent or mortgage payment, lack of confidence in an ability to pay next month's rent or mortgage, delayed medical care, and feeling worried or depressed.DiscussionOur analyses reveal alarming levels of food insecurity among young adults, especially Black and Hispanic young people. Policy actions should include multifaceted and sustained interventions with a focus on supporting historically disenfranchised youth and their communities. These should prevent and address food and housing insecurity and mental health needs holistically.     

预防艾滋病健康教育媒体材料效果评价比较研究

目的评价4种预防艾滋病健康教育媒体材料的信息传播效果和材料效果。该材料由课题组于2003-2005年间设计制作，包括“艾滋病知识”折页、“了解艾滋病”海报、“预防艾滋病健康教育手册”和“认识艾滋病”宣教片等4种。方法2005年12月在珠海市选取小学以上文化程度的18～60岁外来工为测试对象，随机分组对4种材料分别进行评价，各调查了251、248、257和252人，共1008人。通过问卷调查了解受访者的一般情况和对材料信息的可接受性、通俗性和材料形式的生动性等8项指标的评价，采用分级定量赋分的方法进行量化评分，采用SPSS10．1统计软件进行统计分析、比较。结果4种材料的信息传播效果和材料效果总得分平均值分别为74．2±15．0、77．7±13．5、73．0±13．8和77．2±13．6，得分最高的是海报，为77．7±13．5分，最低的是手册，为73．0±13．8分，差异有统计学意义，这种差异主要体现在信息传播效果的差异，而材料效果的差异无统计学意义。通俗性、简明性、生动性和可接受性是影响得分高低的主要因素。结论海报是最适合用于城市外来工进行预防艾滋病健康教育的传播材料，其次是宣教片。     

脉冲激光射线强化金属材料的几个问题

本文讨论了激光脉冲射线强化金属材料的几个问题:强化图形,材料性能,加工用量及表面涂层对被强化表面性能的影响。     

中医人体复杂巨系统理论科学建构

根据人体大脑信息控制系统理论的建立;五脏是人体巨系统的五个子系统;人体巨系统的＂能量信息＂系统和＂物质信息＂系统;阴阳五行在人体复杂巨系统的运用归纳分析,构建中医人体复杂巨系统理论。