新冠疫情背景下纺织产业科技转型策略研究

在新冠疫情背景下,针对我国纺织产业在科技发展方面存在的问题,提出了纺织产业科技转型的有效策略——"一个中心、三个重点",即以科技创新能力建设为中心,以推动产业转型升级、加快智能化建设和加快可持续发展为重点.     

Assessment of contact lens wearers’ attitude toward contact lens wear and care during Coronavirus Disease 2019 (COVID-19) pandemic: A cross-sectional online survey

AimCOVID-19 is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Several reports have provided conflicting recommendations regarding contact lenses (CL) use during COVID-19, causing confusion among CL wearers. The aim of this study is to assess CL wearers’ attitudes toward CL wear and care during COVID-19 pandemic.MethodsA web-based cross-sectional online survey was used to assess the participants’ attitude toward CL wear and care during the COVID-19 pandemic. The survey layout was based on Google form® specifically developed for CL wearers. Demographic characteristics and CL history and profile were also collected for each participant.ResultsA total of 196 CL wearers completed the online survey with an average age was 26 (± 4.1) and 90.8 % of participants were females. As reported by the participants, social media was the main source of information about COVID-19. 38.8 % of the study population reported stopping CL wear during the pandemic. The main stated reason for lens discontinuation was decreased social activities during the pandemic. 61.2 % of participants continued lens wear, with the majority reported considerable changes in their behaviors toward CL wear and care during the pandemic. This includes reinforced hands cleaning before and after lens wear, disinfecting of CLs and CL case and less frequent CL aftercare visits.ConclusionThe majority of the study population have continued CL wear during the pandemic. Contact lens wearers reported profound changes in attitudes toward CL wear including improved care and maintenance. Additionally, changes in CL purchase habit have been reported with more tendency for online purchase. CL cessation has been associated with several perceived reasons mainly attributed to reduced outdoor activity and fear of ocular infection. Levels of compliance among CL wearers should be assessed and reinforced during the current pandemic and similar lockdown situation to reduce possible CL-related complications and dropout.     

新冠肺炎疫情下的营养风险及管理措施

文章从营养角度出发,分析了新冠肺炎后疫情时期面临的营养风险,针对新冠患者提出了相应的营养管理措施,揭示营养干预辅助新冠肺炎治疗的重要意义,并对普通群众提出了实现合理营养膳食的建议。     

Soft contact lens wearers’ compliance during the COVID-19 pandemic

AimContact lens wearers need to maintain optimal hygiene practices during the COVID-19 pandemic to minimise contact-lens complications including microbial keratitis and corneal infiltrative events. This online survey (UK and Ireland) explored contact lens wearers’ compliance behaviours, attitudes and concerns during the pandemic.MethodThe 60-item anonymous online survey was distributed during a 1-month period via Qualtrics (starting on 14/04/20). The survey captured: a) demographic information, b) type of lenses worn and compliance with lens wear and care procedures, c) adherence to recommendations and d) concerns associated with contact lens wear during the pandemic.ResultsTwo hundred and forty seven responses were received (34.3 ± 11.7 years old, 79% female). Seventy nine percent of participants reported that they were self-isolating or rigorously following social distance advice. Fifty-six percent of participants reported using their lenses less during the pandemic. Eighty-seven percent of respondents reported following the recommended 20-second rule most times/every time and 96% used soap and water during handwashing. Eleven percent of respondents admitted not following recommendations regarding disposal of lenses and 18% would not consider ceasing lens wear if unwell (with flu/cold) during the pandemic.ConclusionRespondents reported wearing their contact lenses less than usual. Good compliance with handwashing was observed but soft reusable lens wearers showed a statistically significant lower compliance with lens wear and care compared to daily disposable lens wearers (p=<0.001).     

A family of low and high copy replicative, integrative and single-stranded S. cerevisiae/E. coli shuttle vectors.

We describe a set of replicative, integrative and single-stranded shuttle vectors constructed from the pUC19 plasmid that we use routinely in our experiments. They bear a yeast selectable marker: URA3, TRP1 or LEU2. Replicative vectors carrying different yeast replication origins have been constructed in order to have plasmids based on the same construction with a high or low copy number per cell and with different mitotic stabilities. All the vectors are small in size, provide a high yield in Escherichia coli and efficiently transform Saccharomyces cerevisiae. These plasmids have many of the unique sites of the pUC19 multicloning region and many of them allow for the screening of plasmids with an insert by alpha-complementation. The nucleotide sequence of each of them is completely known.     

免疫营养在COVID-19综合治疗中的辅助作用与应用前景

当前,由新型冠状病毒SARS-CoV-2引起的新型冠状病毒肺炎(COVID-19)大流行已在全球蔓延。除了隔离之外,迫切需要采取能够降低感染和死亡风险的公共卫生措施。营养不良和导致患者免疫功能低下的各种非传染性基础疾病(如肥胖症、糖尿病、心血管疾病等)是重症COVID-19的重要危险因素。应用免疫营养手段,补充具有药理学作用的特殊营养素,以特定方式刺激免疫细胞,增强免疫应答功能,维持适度的免疫反应,调整细胞因子的产生和释放,减轻有害或过度炎症反应,对COVID-19患者预后具有积极意义。本文就维生素、矿物元素、多不饱和脂肪酸、膳食纤维等免疫营养素在降低呼吸道感染风险中的作用,以及免疫营养在COVID-19中应用现状做一综述,以期为免疫营养在COVID-19综合治疗中的辅助作用提供可靠参考依据。     

新冠疫情下医护人员饮食行为与体质量变化的关系研究

目的 探索新冠疫情下医护人员饮食行为与体质量变化的关系,为改善医护人员营养健康提供科学依据。方法 本研究于2022年5～7月,随机选取我国东北地区12所新冠定点医院1 487名医护人员进行问卷调查,剔除无效问卷后,最终获得有效问卷1 352份。采用自编一般情况调查表、饮食行为指标、情绪化进食量表收集数据,采用方差分析、线性回归模型等统计方法进行数据分析。结果 新冠定点医院的医护工作者中,保持体质量（±3%）者485人,占比35.9%,体质量降低超过5%、体质量降低3%～5%、体质量增加3%～5%、体质量增加超过5%者分别占总人数的8.2%(111/1 352)、22.7%(307/1 352)、23.6%(319/1 352)和9.6%(130/1 352)。方差分析结果显示,医护人员饮食不规律、营养不均衡、高油饮食、高盐饮食、高糖饮食、饮料摄入、情绪化饮食等情况在不同体质量变化组间的差异均具有统计学意义（P<0.05）,但饮酒行为在体质量变化五组间的差异无统计学意义（P>0.05）。多因素线性回归结果显示,饮食不规律、高糖饮食、饮料摄入、情绪化进食及月收入等是体质量变化的...     

新冠疫情常态化防控背景下我国食品安全追溯体系建设的思考

2019年突如其来的新冠疫情以及其持续不断地反复给食品安全带来了巨大挑战,尤其是冷链食品已成为当前疫情防控的重点和难点。在新冠疫情防控常态化背景下,如何完善现有食品安全追溯体系使其更好地适应疫情防控常态化特点,满足消费者安全消费和品质消费需求,是当前关乎民生的重大课题。基于此,该研究梳理了我国食品安全追溯体系的现状,剖析了体系建设存在各层级食品安全追溯体系有待整合集成、标准有待进一步健全、生态圈尚需加速构建、进口冷链食品追溯体系亟待强化等问题,而且在新冠疫情防控常态化背景下更为凸显。针对上述问题,该研究提出建立统一的食品追溯管理平台、大力实施标准提升行动、打造可持续发展生态圈、建立良好运行技术环境等,以期新冠疫情常态化防控背景下为强化我国食品安全追溯体系建设、保障食品质量安全提供决策参考。     

Dietary Flavonoid Quercetin and Associated Health Benefits—An Overview

Phytochemicals have received a considerable attention in the present day world. Epidemiological studies have established that phytochemicals contribute more qualitatively to the total antioxidant activity of foods than nutrient antioxidants like vitamin C and vitamin E. Among polyphenols, quercetin constitutes the main flavonoid in our daily diet being particularly abundant in onions and apples. Since the realization that many folk medicines in use contain flavonoids, interest in this class of compounds has intensified. Quercetin acts as a strong reducing agent, which together with other dietary reductants such as vitamin C, vitamin E, and carotenoids protect body tissue against oxidative stress. Recent reports suggest that quercetin as antioxidant improves normal cell survival and as pro-oxidant induces apoptosis in cancerous cells whereby prevents tumor proliferation. Among other important properties like modulation of genes related to cell cycle, signal transduction, and xenobiotic metabolism, quercetin has also been attributed with antiviral, anti-inflammatory, antibacterial, and muscle-relaxing properties. In the literature, only a few in vivo studies have been carried out; therefore, before making any authentic health claim about this compound, it is essential to know its nature and its dietary origin. Furthermore, it is important to know the amount present in different diets and its bioavailability, followed by clinical trials and investigations, if researchers are to use it as an chemo-preventive and chemotherapeutic agent against various deleterious degenerative diseases.     

新冠肺炎疫情对中国木业企业的影响研究

基于161家木业企业网络调查数据分析结果,从木业企业在新冠肺炎疫情下遭遇的困难、2020年第1季度企业经营所受的影响程度、企业亟需的帮扶政策等方面进行分析研究,得出研究结论,并基于研究结论提出有针对性的对策建议。