线圈长度对平针织物尺寸稳定性的影响与分析

本文以平针织物为研究对象,介绍了平针织物的组织结构特征、性能特点等内容。实验以腈纶纱线为原料,根据横机不同的松紧密度盘值编织线圈长度不同的纬平针试样,经条件平衡处理,以尺寸收缩率作为衡量其尺寸稳定性的指标,分析线圈长度对平针织物的尺寸稳定性的影响。     

关于促进工程项目功能考核工作的思考

对钢铁企业工程项目实施过程中影响功能考核工作的因素进行了分析,并对如何避免这些因素的影响进行了探讨。     

新型彩电高、中放AGC起控电平的选取

系统地阐述了新型彩电公共通道中中放和高放有差闭环自动增益控制系统的工作过程，从理论上分析了中、高放AGC起控电平的选取原则以及它们的控制范围。     

不同品种黄皮果汁的品质及抗氧化能力

测定了20种黄皮果汁的可溶性固形物、可溶性糖、可滴定酸的质量分数及pH等基础品质指标以及抗坏血酸、总黄酮和总多酚等生物活性成分的质量浓度, 并采用DPPH法和FRAP法评价其抗氧化能力, 同时探讨了抗氧化能力与抗坏血酸、总黄酮、总多酚质量浓度的相关性.结果表明:不同黄皮品种间的可溶性固形物、可溶性糖、可滴定酸的质量分数和抗坏血酸、总黄酮、总多酚的质量浓度差异较大, 其糖酸比、pH、DPPH自由基清除能力以及FRAP抗氧化能力差异也较大, 基于上述理化指标的Q型聚类分析可将20个黄皮品种分成3大类群; DPPH自由基清除能力、FRAP抗氧化能力均与抗坏血酸、总黄酮和总多酚的质量浓度呈极显著的正相关(P＜0.01), 表明黄皮果汁的抗氧化作用与其所含的抗坏血酸、总黄酮和总多酚关系密切.     

Sol-Gel Preparation of TiO2/SiO2 Nanocomposites and Their Application in Self- cleaning Textiles

The present study involves the preparation of TiO2/SiO2 nanocrystals and their application in self-clcaning wool-polyester fabrics. The TiO2/SiO2 nanocrystals were successfully synthesized and deposited onto wool-polyester fabrics using the low-temperature sol-gel technique. The as-prepared nanoeomposites and the nanocomposites coated samples were characterized by X-ray diffraction （XRD） and scanning electron microscopy （SEM）, respectively. The XRD and SEM results showed that the single-phase anatase nanocrystallites were formed and loaded on the fabric surface successfully. The photocatalytic activities of TiO2 -coated and TiO2/SiO2-coated wool-polyester fabrics were measured by studying photodegradation of methylene blue dye. Comparison of the photocatalytic activity of the coated samples reveals superiority of TiO2/SiO2 modified sample with respect to that of pure TiO2 modified sample. Our observations indicate that by applying this technique to the fabrics, self-cleaning materials can be designed for practical application.