不同实验装置测定粉尘湿润剂的湿润效果相关性

采用滴液法、正向渗透法和反渗湿润法分别研究了3种阴离子型湿润剂对10种硫化矿粉尘的湿润效果,比较了不同实验装置研究湿润剂湿润粉尘的相关性.结果表明:温度约20℃时,使用上述3种实验方法对相同的试剂和粉尘做湿润实验没有相关性,许多情况下还出现完全相反的结果;而对于相同的实验装置,3种湿润剂都具有较好的相关性.由此可以看出,实验室研究湿润剂所采用的方法在原理上要与应用现场的特征相适应,否则就将适得其反.     

基于ARM和DSP的嵌入式ICE芯片扫描分析系统

集成毛细管电泳（ICE）芯片信号采集与处理系统的微型化、智能化是ICE芯片能否得到广泛应用的关键。针对传统的ICE芯片扫描分析系统结构复杂、处理速度慢、体积大等弱点,设计了一种基于DSP＋双口RAM＋ARM的嵌入式ICE芯片扫描分析系统。该系统将高速DSP与在通讯、网络和实时控制方面具有独特优势的ARM处理器,以及实时性好、接口电路简单、数据传输量大的双口RAM结合起来,为开发高性能、集成化、便携式的新型微小生化分离分析系统奠定了一定的技术基础。     

Electrochemical deposition of polypyrrole–carbon nanotube films using steroid dispersants

Polypyrrole (PPR)–carbon nanotube (CNT) films were prepared by an electrodeposition method, combining PPR electropolymerization and anaphoresis of CNT. PPR polymerization experiments showed advantages of a dopant from the catechol family for the deposition of PPR films at reduced electrode potentials. The method allowed the formation of adherent films on stainless steel substrates. The amphiphilic molecules with steroid-like structures, such as carbenoxolone disodium salt, glycyrrhizic acid, ammonium salt, and sodium taurodeoxycholate, were used for dispersion and charging of CNT. The new dispersing agents showed outstanding dispersion ability. In addition to dispersing properties, electrodeposition experiments revealed film-forming properties of carbenoxolone and ability to form pure carbenoxolone or carbenoxolone–CNT films. The PPR–CNT films formed using carbenoxolone disodium salt, glycyrrhizic acid ammonium salt, and sodium taurodeoxycholate showed diverse microstructural features. The dispersion and deposition mechanisms were discussed.     

The murine plasma protein response to polymicrobial intra-abdominal sepsis

Protein biomarkers in the peripheral blood could potentially be used as early indicators of sepsis and a means to stratify patients for clinical trials. Although individual molecular markers have been proposed for sepsis, none has clinical utility. The global changes in plasma proteins over the clinical course of sepsis have not been characterized using proteomic methods. We used cecal ligation and puncture to induce polymicrobial sepsis in mice and generated plasma protein profiles using 2‐D DIGE of plasma from septic mice and surgical controls. Replicate cohorts (n = 3) of 4–7 animals each were used to identify 62 gel features that changed significantly (Student's t‐test, p<0.05). We identified a suite of plasma proteins that describe uniquely the host plasma response to polymicrobial septic insult. Principal components analysis of protein abundance showed that ～90% of the variability between samples was due to sepsis. In addition to canonical acute phase proteins, we identified proteins that are associated with metabolic changes (e.g. α‐2 HS glycoprotein and zinc α‐2 glycoprotein) consistent with the pathophysiology of sepsis. The panel of sepsis‐associated molecular markers identified herein may prove useful in the diagnosis and categorization of sepsis.     

不同品系北京鸭血清前白蛋白多态性的研究

应用聚丙烯酰胺凝胶电泳法研究了北京鸭的血清前白蛋多态性,在2个位点观察到多态,Pam位点为单态,在Pas位点发现有5种表现型,它们的频率是：Pas2-2O 26．67％,Pas1-2为12％,Pas2-1为45.33%,Pas1-1为2．67％,Pas2-0为13．33％,在Paf位点发现有4种表现型,它们的频率是：PafF为29．33％,PafS为41．33％,PafFS为10．67％,Paf0为18．67％,并计算了它们的基因频率,群体平均杂合度和遗传距离,遗传分析表明,樱桃谷鸭和奥白星鸭遗传结构相似,而与B系北京鸭遗传结构有明显差异。     

浅谈阴极电泳涂装中涂膜形成针孔的原因及解决措施

分析了阴极电泳涂装中形成针孔的原因,提出了在实际施工过程中解决此类问题的方法以及各项工艺参数的控制。     

毛细管气相色谱法测定1,4-环己烷二甲醇

研究了1,4-环己烷二甲醇的气相色谱测定方法。在选定的实验条件下,定量结果的相对标准偏差为0.42%,回收率为98.1%。     

毛细柱气相色谱法分析水中甲醇的研究

采用PC-5（固定相为交联5％苯基-95％甲基聚硅氧烷）毛细柱直接进样分析环境（水和空气）中的甲醇,实现甲醇及共存物干扰物质（甲醛、乙醇、丙酮、丙酮、异丙醇）的分离,利用高浓度（分流比5．0）和低浓度（分离比1．0）两个工作曲线对环境中甲醇进行准确测定。     

软模板法制备球形TiO_2中空纳米电泳粒子

电泳粒子的稳定性对电泳显示器件的显示效果至关重要.由于二氧化钛粒子密度较大,极易团聚,所以很难悬浮于有机溶剂中.模板法可以有效控制所合成纳米材料的形貌、结构和大小.以聚合物为模板,通过湿化学法模板上沉积,在空气氛围中高温煅烧以去掉内核来制备球形TiO2中空纳米粒子.用红外光谱、热重分析、X射线衍射和透射电镜进行了表征,并通过微电泳仪测TiO2粒子的Zeta电位.结果表明：球形颗粒比表面积大、流动性好,能减小粒子运动的阻力,而且中空结构能明显降低密度.