分形图案与传统纺织印花图案的形式美感对比

 分形图案和传统纺织印花图案属于不同的美学范畴。通过分析分形图案和传统纺织印花图案各自的美感特征,从对称与均衡、奇异与和谐、重复与渐变、节奏与韵律、简单与复杂5个方面对分形图案和传统纺织印花图案的形式美感进行了对比,指出分形图案虽然有其独特的视觉审美价值,但在印花技术、创作方式、文化内涵等方面存在一定的局限性,传统纺织印花仍然具有不可替代性。     

Rapid quantitative method for total brominated vegetable oil in soft drinks using ion chromatography

A simple, quantitative and rapid method for total brominated vegetable oil (BVO) using ion chromatography (IC) with suppressed conductivity detection was developed and successfully applied to soft drinks with results expressed as inorganic bromide anion. The procedure involves extraction of BVO with diethyl ether and treatment with zinc dust in a solution of acetic acid, giving recoveries ranging between 92.5 and 98.5%. The calibration curves obtained were linear with correlation coefficients (r (2)) of 0.998, a coefficient of variation (CV) of less than 5% and limit of detection (LOD) and limit of quantification (LOQ) of 250 and 750?μg?l(-1), respectively. The method was successfully applied to the determination of BVO in several commercial soft drinks which were found to contain BVO in the range 1.8-14.510?mg?l(-1). The method has less sources of error compared to previously published methods.     

卷烟鉴别仪器分析技术研究进展

介绍了人工嗅觉系统、近红外光谱分析技术和气相色谱或气相色谱-质谱联用3种仪器分析技术在卷烟鉴别中的应用,探讨了仪器分析技术在卷烟鉴别中存在的问题,对应用前景进行了展望。     

基于二氧化锡/碳化硅空心球纳米链的电化学传感器检测食用油中黄曲霉毒素B1

在电极基底和抗体探针修饰生物相容性良好的二氧化锡/碳化硅空心球纳米链、聚苯胺纳米线、金纳米颗粒等纳米材料,放大电化学信号,提高检测灵敏度,构建黄曲霉毒素B₁直接竞争检测电化学传感器。结果表明:该传感器对黄曲霉毒素B₁的检测线性范围为3.81pg/mL～1.00μg/mL,检出限为1.13pg/mL。传感器具有良好的稳定性、重现性和特异性,对食用油的检测添加回收率在84.6%～107.6%,变异系数在5.42%～10.49%,可应用于食用油中黄曲霉毒素B₁的快速筛查。     

Mathematical modelling of perorally induced immunological tolerance

A mathematical model of the mechanism of development of orally induced immunologic tolerance has been suggested. The model presents a system of differential non-linear equations, and it is realized as a program in FORTRAN. The model describes primary and secondary immune responses, reflects the main features of the immune system response to antigen intake with food. The immune system model response to varying doses and frequency of the antigen intake with food has been studied. It has been established that repeated administration of small doses of the food antigen leads to a deeper tolerance due to lower stimulation of the immune system. The existence of optimal tolerogenic doses of the food antigen has been proved. Qualitative changes in the immune system response to the food antigen have been recorded in case of increased permeability of the intestinal wall.     

复杂环境下砖砌烟囱的爆破拆除

本文介绍了采用定向爆破拆除一座砖砌烟囱的施工设计方法,包括爆破方案选择、爆破切口设计和爆破安全验算等内容,对类似工程有一定的参考意义。