Fabrication of robust self-cleaning superhydrophobic coating by deposition of polymer layer on candle soot surface

A facile and inexpensive way have been developed to fabricate robust self-cleaning superhydrophobic coating by depositing polymer layer on candle soot (CS) surface using dip coating method. The stability and robustness of the CS deposited superhydrophobic surface is much weaker due to weak interaction and nonchemical bonding with the substrate. We introduced a thin layer of polystyrene, polyethylene, polypropylene (PP), and polyvinylidene fluoride on CS surface in order to improve its mechanical properties. The fabricated surfaces with the use of respective polymers exhibited water contact angles of nearly 170, 174, 175, and 171° with sliding angles of 2, 1, 1, and 3°, respectively. Although, all the polymers used in this work exhibited excellent superhydrophobic and self-cleaning surface property, we found that the PP deposited CS surface exhibit better stability against water jet hitting and water drop impact tests. The PP deposited CS surface almost maintained their surface properties even after 50 cycles of sandpaper abrasion and 20 cycles of adhesive tape peeling tests. The mechanical durability tests confirmed that PP is a better polymer to improve the long-term durability of CS surface. Therefore, this simple, time saving, and inexpensive method for fabricating superhydrophobic coating can be used for potential industrial application.     

Lotus Domino/Notes在网络办公自动化中的应用

发文管理系统是一个基于工作流管理的网络办公自动化系统.它采用世界领先的群件和电子邮件产品Lotus Domino/Notes为开发与使用平台.在网络环境下,该系统使发文工作的各步:起草人起草公文,各级领导审批,核稿人核稿,文书下发职能部与归档等,真正实现了自动化.利用Notes的强大安全机制,通过为用户指定权限,电子签名等技术,满足了实际工作中的安全性要求.     

A lotus 1-2-3 model for airline level of operations planning

In this paper a Lotus 1-2-3 model that forecasts operating statistics for an airline is presented. The Level of Operations Model is useful in long range planning because a schedule is not required to produce the forecasts. The paper lists the key formulas and required data. Successful applications of the model such as fleet planning, and pilot pay studies are discussed.     

荷叶淡竹叶功能性含乳饮料的工艺研究

以鲜牛乳为主要原料,适量添加荷叶和淡竹叶浸提汁及其他辅料,研制出口感优良、风味独特、营养丰富、质量稳定的新型含乳饮料,探讨了荷叶、淡竹叶的浸提工艺,并通过正交实验得出了饮料的最佳配方。结果显示,该饮料的最佳配方为:鲜牛乳35%、荷叶浸提汁30%、淡竹叶浸提汁15%、白砂糖10%、柠檬酸0.15%、复合稳定剂0.15%。     

Inhibition effect of procyanidins from lotus seedpod on mouse B16 melanoma invivo and in vitro

Significant growth inhibition effects of procyanidins from lotus (Nelumbo nucifera Gaertn.) seedpod (LSPCs) on mouse melanoma B16 were found both in vivo and in vitro. In vivo treatment with LSPCs inhibited tumour growth in C₅₇BL/6 J mice by 55.3% in terms of average tumour weight. LSPCs can significantly (P < 0.05) decrease lipid peroxidation (LPO) levels and increase the activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH-Px) in liver tissue. In vitro assay of anti-cancer activities suggested that LSPCs (25–100 μg/ml) possessed cytotoxicities against mouse melanoma B16 in a dose-dependent mode. Furthermore, LSPCs had significant (P < 0.05) stimulatory effects on mouse splenocyte proliferation. The prevention of tumour growth was exerted through diverse mechanisms, including cell-cycle arrest, induction of tumour cell death by apoptosis and increase of Ca²⁺ ions, together with stimulation of antioxidant enzyme activities and immunomodulatory activities.     

微波协同萃取及纯化荷叶黄酮的初步研究

本文研究了无水乙醇、乙醇水溶液及乙醇水溶液结合微波照射浸提荷叶黄酮和采用大孔吸附树脂分离纯化荷叶黄酮提取液.实验结果表明:以60%乙醇水溶液作提取剂,固液比1:30、微波照射1.5min、浸提2.5h,荷叶黄酮浸出最多;荷叶黄酮浓度≤25g/l,提取液在4.7BV/h流速下过大孔吸附树脂柱,再用4.5BV/h流速的丙酮洗脱,荷叶黄酮得到较好分离纯化.     

莲花纹样在陶瓷装饰中的造型风格演变探析

莲花纹样作为陶瓷装饰中古而有之的样式,自魏晋南北朝至宋元明清,各个时期的莲花纹样及陶瓷作品之间的风格演变呈现多维发展,从此时期中析出富有时代特色的风格样式。     

秦皇岛市离岸莲花岛设计方案初步比选

针对秦皇岛市离岸莲花岛工程设计阶段两种规划方案进行了初步比选工作。介绍了离岸莲花岛工程方案及本工程海域的自然条件;采用经验证的二维潮流及对流扩散数学模型对两种方案实施后的潮流泥沙场特征及其水体交换情况进行了数值模拟;给出了两种方案的投资预算,并进行了初步比选。结果表明,设计阶段两方案均具有较高的可行性。针对两种方案设计上的不同,建议将环带区和核心区作为首期建设用地,先期进行围海造陆,花瓣区作为二期建设用地,下一步通过论证,选取技术经济性较高的结构方案。     

基于工作流的办公系统设计与实现

在对工作流办公系统(0A)进行深入研究的基础上,采用基于B/S结构,阐述系统的设计原则、设计思想、体系结构设计、功能设计和安全设计,给出了一个结合Internet/Intranet和Web技术的办公自动化系统实例.     

浅析中国传统装饰艺术小品须弥座

须弥座是中国古代建筑基座的标志性形式,所谓"须弥"按《佛经》的说法就是象征世界中心的须弥山——喜马拉雅;通过分析须弥座的结构和纹样特征能指,指出须弥座的结构分为三部分:上下枋、束腰和上下枭,上下枋一般用卷草纹装饰,束腰上有门镶嵌,上下枭用莲花纹装饰;探讨了须弥座的结构和纹样内涵,揭示出须弥座独特的精神内涵,它反映了中华文化的开放性、吸收性以及包容性,也是须弥座能够流传至今的原因之所在。