In situ absorption and metabolism of stilbene glycoside in rat

Stilbene glycoside (TSG) has been shown to have many beneficial properties. It is therefore essential to understand the absorption and metabolism of TSG in detail. We determined the recovery of TSG and its metabolites (TSG sulfate/glucuronides) in rat gastric contents, gastric mucosa, portal vein plasma, celiac arterial plasma, bile, and urine after administration of 15mg of TSG in 0.5mL physiological saline or incubation for 20min in situ in the stomach of rats. Within 20min, (64.0±9.8)% of the administered TSG disappeared from the stomach; later, TSG was recovered in both free and conjugated forms in plasma and bile, but not in urine. On the other hand, only free TSG was detected in the gastric contents and mucosa; it was also detected in the portal vein plasma as (48.1±3.5)% of the total TSG (all forms of TSG). However, the proportion of free TSG in the celiac arterial plasma and bile decreased to 4%-10%. In addition, the proportion of free TSG to total TSG in the liver microsome incubation mixture after TSG was incubated in liver microsome at 37℃ for 30min was very low [(10.6 ± 2.6)%]. These results indicate that TSG could be quickly absorbed from the rat stomach, conjugated in liver and excreted in bile. Such novel information would be helpful for the use of TSG as a beneficial natural product which may improve its proposed efficacy in preventing chronic diseases.     

路基处理车液压阀块清洁度案例分析与对策

对发生在路基处理车生产过程中的一起液压阀块清洁度案例进行分析,从液压阀块清洗整备和装配角度,提出如何防止液压阀块残留污染物进入液压系统的对策措施。     

东风雪铁龙 世嘉C-QUATRE正式发布

东风雪铁龙世嘉为驾乘人员精心营造出了一个雅致温馨、无忧舒适的车内空间。色彩搭配温馨和谐,色调柔和悦目;座椅舒适,支撑性好;多样化储物空间的巧妙安排共同实现了车内出色的空间感与舒适感。     

预先安装路肩石工艺的探讨

路肩是路面的边缘，主要分硬化路肩和土路肩两种，两种路肩也可同时使用。设路肩的主要目的是保护路面结构层。山区二级公路现多采用25厘米至30厘米宽路肩石做硬化路肩，其施工方法有现浇和预制两种。传统的施工方法是在铺筑路面结构层后再沿路面边线切除多余部分，然后挖槽镶砌路肩石预制块或进行路肩石现浇。     

LTE-R系统的双流波束赋形方案设计与研究

在高速铁路快变无线信道条件下,为了提高频谱利用效率,减小同频干扰,利用有效功率最大化准则提出一种新的基于PMI量化的双流波束赋形方案。所提方案构建了适合高速铁路场景下基站八天线下行波束赋形权值码本并设计波束赋形权值快速搜索方案,进而利用TDD系统信道互异性搜索量化赋形权值。仿真结果表明,该方案在大大降低系统双流波束赋形复杂度的同时,相对于传统基于SVD分解算法性能损失不大,可实现LTE-R系统下行快速双流波束赋形。     

谈现代物流企业经营模式的创新——哈尔滨物流中心金融物流业务之探讨

针对我国目前物流企业的现状及存在的问题，结合企业实际就推进和发展现代物流企业经营模式进行了深入的探讨。     

大跨径连续梁0号块托架结构设计及预压施工

郑万高铁汉江特大桥主桥为(109+220+109)m连续刚构-拱结构,主桥0号块为单箱双室结构,长度达22m,高达12m,混凝土方量约2 209m~3,重约5 743.4t。0号块采用托架法施工,托架结构由][10楔形底模桁架、2HN45分配梁、主承重桁架、横向联结系、预埋件等组成。主承重桁架通过对拉杆和销轴固定在墩身上。托架所承受0号块施工荷载较大,为确保托架的施工安全,采用多点千斤顶反压法进行预压施工。托架预压分60%、80%、100%、110%四级进行,加载总重量为0号块悬臂段施工荷载的1.1倍。在预压加载过程中对托架沉降以及焊缝进行观测,结果表明托架的强度和刚度能够满足施工要求。     

舞水二桥V型刚构连续梁超长0号块施工

舞水二桥为一座V型刚构连续梁桥,V型墩夹角大,0号块箱梁长29 m且墩身位于深水中,施工难度大,施工工艺复杂。着重介绍了0号块箱梁的施工方案及现场控制。     

隧道围岩开挖稳定性等级综合评判实用方法研究

针对目前围岩稳定性等级评价方面存在的缺陷,考虑影响围岩体稳定性的主要因素,提出了一种基于层次分析法(AHP)和物元模型的综合评价系统.以围岩稳定性等级、评价指标及其特征值构造物元模型,同时采用层次分析法计算各评价指标的权系数,并根据计算出的综合关联度来实现对各围岩稳定性等级综合评判.以某水电站2号导流调工程实例验证了该系统的科学性、可靠性以及适用性.     

混凝土嵌挤块路面面层的铺筑技术

针对砼嵌挤块路面结构的特点，提出了适合我国国情的面层的施工方法，并对各结构层，特别是面层材料提出了比较具体实用的技术指标。通过试验路近一年运行表明，该方法是可行的。