应用系统层次分析法合理分配企业的利润留成

本文运用系统层次分析法，对东北制药总厂如何合理使用利润留成进行决策，从而促进了工厂的新发展，使工厂的整体效益最佳。     

DHAC改性膨润土对炼油碱渣废液的吸附机理探讨

以有机插层剂双十八烷基二甲基氯化铵(DHAC),对新疆夏子街膨润土进行插层改性,制备DHAC改性膨润土。红外光谱(FTIR)分析表明,双烷基阳离子插层进入蒙脱石片层。X射线衍射(XRD)表明,DHAC改性膨润土片层间距为3．772 nm,为改性前的2．07倍,表明改性后蒙脱土片层间距增大。SEM分析观察, DHAC捕层改性后膨润土颗粒更加疏松,蒙脱石颗粒表面有明显的刻蚀痕迹。通过研究改性膨润土的吸附机理分析表明,DHAC改性膨润土在不同温度下的等温吸附模型符合Freundlich模型,且相关性较高。挥发酚在改性膨润土上的吸附焓值为-2．64 kJ／mol,属于物理吸附,且△Gθ<0,说明该吸附为自发的放热过程。室温下DHAC改性膨润土吸附挥发酚的动力学模型遵循Bingham和Langmuir速率方程。     

Lysinoalanine formation and conformational characteristics of rice dreg protein isolates by multi-frequency countercurrent S-type sonochemical action

The influences of multi-frequency countercurrent S-type ultrasound (MFSU), with various frequency modes, on lysinoalanine (LAL) formation and conformational characteristics of rice dreg protein isolates (RDPI) were investigated. The ultrasonic operating mode with dual-frequency combination (20/40 kHz) indicated lower LAL content and higher protein dissolution rate of RDPI compared with that of other ultrasound operating modes. Under the dual-frequency ultrasound mode of 20/40 kHz, acoustic power density of 60 W/L, time of 20 min, and temperature of 35 °C, the relative reduction rate of LAL of RDPI reached the highest with its value of 26.95%, and the protein dissolution rate was 71.87%. The changes in chemical interactions between protein molecules indicated that hydrophobic interactions and disulfide bonds played a considerable role in the formation of LAL of RDPI, especially the reduction of g-g-g and g-g-t disulfide bond. Alterations in microstructure showed that ultrasonication loosened the protein structure and created more uniform protein fragments of RDPI. In conclusion, using MFSU in treating RDPI was an efficacious avenue for minimizing LAL content and modifying the conformational characteristics of RDPI.     

2种偶氮席夫碱类化合物的合成及其热致变色性质

摘 要 合成了两种偶氮席夫碱类化合物,通过元素分析,核磁共振氢谱,红外光谱表征了其结构, 经紫外光谱测试表明,这两种化合物具有良好的热致变色性质,在恒定温度下,其trans-cis吸收波长的变化和时间的变化有较好的线性关系。     

用拉曼光谱研究溶胶－凝胶法制TiO_2的析晶过程

本文报道了用拉曼光谱研究溶胶一凝胶（Ｓｏｌ一Ｇｅｌ）法制备ＴｉＯ＿２粉末的析晶过程。结果发现在４００～５００℃时析出锐钛型晶体，在６００℃前锐钛型开始向金红石型晶体转变，６００～７００℃析出的是锐钛型与金红石型的混合晶体，到８００～９００℃时完全转变成金红石晶体析出。析晶温度和转化温度比一般工业法制ＴｉＯ＿２粉末的相应温度要低得多。其原因初步用溶胶一凝胶法本身的反应机制和凝胶的多孔网络特性加以阐明。     

Effect of dual-frequency ultrasound on the formation of lysinoalanine and structural characterization of rice dreg protein isolates

The effect of dual-frequency ultrasound treatment with different working modes on the lysinoalanine (LAL) formation and structural characterization of rice dreg protein isolates (RDPI) was studied during alkaline exaction processing. Ultrasonic notably decreased the LAL amount of RDPI and enhanced the protein dissolution rate. The LAL content of RDPI, especially sequential dual frequency 20/40 kHz, decreased by 12.02% (P < 0.05), compared to non-sonicated samples. Herein, the protein dissolution rate was higher. The changes in sulfhydryl groups was positively correlated with the LAL formation. The amino acids (AA) such as threonine (Thr), lysine (Lys), and arginine (Arg) were reduced, resulting in a decrease in LAL content following sonication. Besides, ultrasonication altered protein secondary structure by reducing random coil and β-sheet contents, while α-helix and β-turn contents increased. Alterations in the surface hydrophobicity, particle size, particle size distribution, and microstructure indicated more irregular fragment with microparticles of RDPI by sonochemical treatment. Thus, ultrasound treatment may be a new and efficacious process for controlling the LAL generation in prepared-protein food(s) during alkali extraction.     

基于估计相对位置的方案排队法在班主任工作评估中的应用

本文介绍了基于估计相对位置的方案排队法的计算步骤，并结合班主任工作评估，阐明了它在教育评价中的具体应用     

Sesquiterpenoids from Curcuma wenyujin dreg and their biological activities

Four new sesquiterpenoids,4,8-dioxo-6β-hydroxyl-7β,1 1-epoxycarabrane(1),4,8-dioxo-6β-hydroxyl-7,1 1-epoxycarabrane(2),wenyujinins Q and R(3-4),and nine known sesquiterpenoids(5-13) were isolated from the Curcuma wenyujin(C wenyujin) dreg.Their structures and relative configurations were elucidated using 1D,2D NMR,and HR-ESI-MS data.All the compounds were isolated for the first time from the C.wenyujin dreg and evaluated for their antibacterial and antifungal activities.Compounds 3,5-8 exhibited strong broad-spectrum antifungal activities against tested nine pathogenic fungi.     

闭逐块光滑流形上的Cauchy－Fantappie型积分的边界性质

对Ｃ￣ｎ空间中具有逐块Ｃ￣（１）光滑可定向边界Ｄ的有界域Ｄ和著名的Ｃａｕｃｈｙ－Ｆａｎｔａｐｐｉｅ公式，本文定义一类与Ｂｏｃｈｎｅｒ－Ｍａｒｔｉｎｅｌｌｉ核同伦等价的Ｃ－Ｆ核Ω，应用同伦方法证明具有Ｈｏｌｄｅｒ密度的相应奇异积分Ｆ（ｔ）存在哥西主值和Ｃ－Ｆ型积分Ｆ（ｚ）存在满足Ｈｏｌｄｅｒ条件的内、外极限值Ｆ￣＋（ｔ）和Ｆ￣－（ｔ）；同时建立一个更一般的含有边界上点ｔ的立体角系数α（ｔ）的Ｐｌｅｍｅｌｊ公式。     

激波诱导的燃烧粉尘云边界层的结构

足够强的激波扫过铺有可燃粉尘的界面时，波后形成燃烧的粉尘云边界层。为揭示其内部结构，本文对该现象进行了实验和理论两个方面的研究。理论计算表明燃烧粉云边界层可分为三个区域：诱导区、反应区和扩散区，诱导区的粉尘浓度最高，计算获得的粉尘云轮廓和点火延迟与实验结果基本吻合．