高校保卫部门工作网站建设

随着校园网在高校的迅速普及,高校保卫部门网站建设为高校保卫部门工作的开展增添了新方法和新途径,是法制宣传教育新阵地新手段。充分利用校园网络资源,介绍了保卫部门网站建设的原则及内容,并提出了网站维护和推广的新思路,可高效地完成对保卫处各项事务的处理,为师生员工创建一个平安校园保驾护航。     

基于指数同态滤波耦合细节锐化规则的 红外图像增强算法

为了解决当前红外图像增强方法存在的光晕及细节模糊等不足,提出了指数同态滤波耦合细节锐化规则的红外图像增强算法.基于同态滤波方法,通过频域中的像素点与中心像素点的距离,构造指数型同态函数,以同时完成图像的去噪和增强对比度处理.联合相位一致性方法和自适应高提升滤波方法,构造了细节锐化机制.在图像的细节锐化中,利用相位一致性方法,通过傅里叶变换,准确提取出图像的细节特征.并引入高提升滤波方法,利用图像的均值,构造自适应的锐化因子,以形成自适应高提升滤波方法,对提取的图像细节特征进行锐化,完成图像细节内容的增强.实验结果表明,较当前的红外图像增强算法而言,所提算法具有更好的增强效果,其增强图像呈现出更为理想的对比度和更为清晰的图像边缘.     

Preparation and characterization of a novel antibacterial hydrogel based on thiolated ovalbumin/gelatin with silver ions

Hydrogels synthesized from natural proteins have better biocompatibility than polymer hydrogels. In this paper, the hydrogels (referred to as tOVA/tGel@Ag) was developed using coordinative crosslinking of thiolated ovalbumin (tOVA) and thiolated gelatin (tGel) with silver nitrate. After thiolation with Traut's reagent, the free sulfhydryl group content of ovalbumin increased from 1.5 μmol/g to 68.6 μmol/g, and the molecular weight (MW) increased from 44.5 kDa to around 50 kDa. Then, the physicochemical and rheological properties of hydrogels with different tOVA/tGel ratios (10:0, 7:3, 5:5, 3:7, and 0:10) were analyzed. With the decrease in the proportion of tOVA/tGel, the scanning electron microscope (SEM) showed that the network structure of hydrogel became more uniform and denser. Meanwhile, microrheological analysis displayed that the gel properties had been improved, which coincidently confirmed a better water-holding performance. During the antibacterial experiment, the diameter of the bacteriostatic ring of tOVA/tGel@Ag hydrogels against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) could reach 10.8 mm and 10.3 mm respectively, indicating their significant antibacterial properties. In summary, hydrogel prepared with thiolated proteins exhibited a good three-dimensional (3D) network structure with the help of silver ions, which was expected to play an important role in the field of food and medicine as antibacterial materials.     

Fabrication of quercetin-loaded nanoparticles based on Hohenbuehelia serotina polysaccharides and their modulatory effects on intestinal function and gut microbiota in vivo

This research was aimed to construct the nanoparticles based on Hohenbuehelia serotina polysaccharides for encapsulation of quercetin (QC-HSP NPs), and investigate their effects on intestinal function and gut microbiota in mice. Results showed that in comparison with HSP and control, QC-HSP NPs significantly improved immune organ indexes, colon length, fecal moisture content and intestinal peristalsis capacity of mice. The productions of short-chain fatty acids (SCFAs) in colon were also increased after treatment with QC-HSP NPs, while the colonic fecal pH was decreased and defecation time was shortened. Through analysis of 16S rRNA sequencing, QC-HSP NPs could increase α and β diversities of gut microbiota, modulate their structure and composition, and increase the relative abundance of beneficial bacteria together with reducing the richness of harmful bacteria. In addition, QC-HSP NPs ameliorated the metabolic functions of gut microbiota by modulating metabolic pathways. This study suggested that QC-HSP NPs might be served as a prebiotic for protecting intestinal health.