The challenges of COVID-19 control policies for sustainable development of business: Evidence from service industries

Such large-scale disruptions as the pandemic increase the uncertainty and risk related to business. Therefore, the business continuity management (BCM) has become an essential technical solution for enterprise emergency response. Since the beginning of 2020, the COVID-19 has spread worldwide at an alarming rate causing many threats to sustainable development of the business sector. The decline in consumer demand has hugely impacted service industries, such as wholesale and retail sales, tourism. Enterprise production and operations have faced severe challenges. In this study, we develop a risk factor analysis of BCM under the presence of COVID-19 in China. Based on a statistical survey of 940 enterprises in Hangzhou City, China, this study employs ordinal logistic regression to explore the hindering effect of risk factors introduced by the epidemic on business performance. Then, the interpretive structure model (ISM) is applied to analyze the hierarchical structure of the factors under examination. The key factors influencing the enterprise production and operation during COVID-19 outbreak significantly differ across the sub-sectors of the service industry. Therefore, this paper assesses the resilience of the productive technologies and business models of different industries amid the pandemic. This paper proposes epidemic prevention and control strategy focusing on investment and government regulation to ensure sustainable business development.     

Development of medical cotton fabrics with Punica granatum L extract finishing for nosocomial infections control

Transmission of pathogenic microorganisms on textile in the hospital settings may contribute to nosocomial infection. This study was aimed to develop a natural antimicrobial finishing on textile that can prevent transmission of pathogenic microorganisms that meets American Association of Textiles Chemists and Colorists (AATCC) standard. Punica granatum L ethanolic extract was shown to have broad spectrum antimicrobial efficacy with bis(6-methylheptyl)-benzene-1,2-dicarboxylate and ethyl-pentadecanoate as the main bioactive constituents. Textile samples developed with the extract finishing exhibited excellent antimicrobial efficacy with a growth reduction of 99.9% on Hoheinstein Challenge Test. The wash durability of the finished textile was found good even after 30 washes with commercial detergent.     

油莎豆白酒发酵工艺优化及其品质指标检测

以油莎豆饼和高粱为原料，分别采用固态和液态发酵工艺酿造油莎豆白酒，对油莎豆白酒的发酵工艺进行选择。在此基础上，采用单因素试验及正交试验探究发酵温度、糖化酶添加量以及活性干酵母添加量对油莎豆白酒发酵及理化指标的影响，从而确定油莎豆白酒的最佳固态发酵工艺条件，并对油莎豆白酒发酵过程中酒醅的发酵指标进行实时监测。结果表明，油莎豆白酒的最佳发酵工艺为固态发酵，最佳发酵工艺条件为发酵温度23 ℃，糖化酶添加量190 U/g、活性干酵母添加量0.5‰。在此优化条件下，油莎豆白酒的酒精度为9.2%vol，总酯含量为2.96 g/L，总酸含量为1.45 g/L，乙酸乙酯含量为2.42 g/L，出酒率达到41%。油莎豆白酒发酵过程中，酒精含量逐渐升高，最后趋于平缓，发酵结束后，酒精度达9.2%vol；发酵温度先上升后下降，第6天时酒醅温度达到峰值（27.9 ℃）；剩余淀粉含量逐渐下降，发酵结束后，淀粉消耗12.21%。     

Effect of light,food additives and heat on the stability of sorghum 3-deoxyanthocyanins in model beverages

This work aimed to evaluate the stability of sorghum 3-deoxyanthocyanins (DXA) in model beverages (pH 3.5) elaborated with crude sorghum phenolic extract, containing ascorbic acid and sulphite, under fluorescent light exposure and subjected to heat treatment. There was no significant difference in the DXA degradation during storage under light exposure (24.16%) and absence of light (20.72%). DXA degradation did not differ in the presence of ascorbic acid during storage under light exposure (23.99–25.38%) and absence of light (19.87–21.74%). The addition of sulphite caused an initial bleaching reaction, but as a reversible reaction, the anthocyanin content was higher on the last day of storage compared to the first day. There were no significant differences in total anthocyanin content of all treatments subjected to the heat treatment (80 °C for 5 and 25 min). Thus, crude DXA are very stable under light, additives and heat, and may be useful as natural food colourants.     

繁缕挥发油化学成分的GC/MS分析

The chemical constituents of volatile oils extracted from Stellaria Media (L.) Cyr with hydro-distillation was analyzed and identified by GC/MS. 102 peaks were separated and 49 components were identified . The main components are aliphatic acids, alkanes and its derivatives. The percentage of each constituents was calculated by “area unitization” method.     

气相色谱-质谱法分析含羞草挥发油的化学成分

采用常规水蒸气蒸馏法提取含羞草中的挥发油，并用气相色谱-质谱法分析其化学成分。分离出41个峰，鉴定出34种化学成分，占总峰面积的89.01 %。含羞草挥发油中主要成分为N,N-二苯基-肼酰胺、邻苯二甲酸二异丁酯、邻苯二甲酸丁基-2-甲基丙基酯、十九烷、1H-吲哚-3-乙醇、二十四烷、2,4-二（1-苯乙基）苯酚、二十六烷、二十七烷等。     

探空站历年各方位的仰角最低值统计程序

在L波段测风雷达拟建过程中，各探空站都要做一项工作量巨大且繁琐的统计工作。为此本人利用业余时间编写了一个自动统计程序，它能自动进行统计计算，节省人力和时间。本程序在本省、北京、上海等一些探空站使用过，反映良好。本文将介绍其使用方法。     

MoSi2/不锈钢的梯度连接及其接头组织

采用放电等离子烧结技术和有限元分析设计的MoSi2/316L梯度材料作为过渡层连接MoSi2与316L不锈钢,研究了各层及界面组织.结果表明:MoSi2与梯度过渡层材料间热膨胀系数的有效匹配,可防止低韧性MoSi2由连接温度(1 200 ℃)冷却时产生的残余应力而引起的开裂;使用9层MoSi2/316L梯度材料过渡层体系可获得一种组织致密且均匀的接头;MoSi2/316L不锈钢梯度过渡层在宏观上呈现明显的梯度,微观上则表现出成分连续变化,且各层成分分布均匀.     

中草药对蛹虫草液体深层发酵的影响

运用均匀性试验,正交试验和Ｄ－最优设计等方法,以菌丝体干重为指标,对蛹昌菌进行液体发酵获得了最佳添加中草药培养基的配方,确定了最适培养条件。