超细颜料黄14水性分散体的制备及性能

研究了超细颜料黄14水性分散体的制备工艺,对比了不同粒径分散体的颜色性能.结果表明,当pH值为9、颜料黄14含量为20%、聚羧酸分散剂(PCA)用量为颜料用量的24%时,所得分散体的粒径较小,稳定性较高.颜料黄14粒径越小,染色织物的牢度越高,颜料黄14粒径为184.5nm时,染色织物的K/S值较高.     

高分子聚合物对颜料分散体系稳定性的影响

研究了不同类型水溶性高分子聚合物对喹吖啶酮颜料分散体系稳定性的影响。通过对吸附不同类型高分子聚合物后颜料红122粒子的ξ电位和分散稳定性以及分散体系粘度的研究，发现阴离子型高分子聚合物SMA对喹吖啶酮颜料的分散稳定性最好，两性型高分子聚合物分散性能次之，而非离子型高分子聚合物PVP较差。从而说明对于颜料红122粒子来说，非离子型水溶性高分子聚合物的空间位阻作用并不充分，其对颜料分散性能较差。水溶性高分子聚合物对颜料的分散主要靠静电力起作用。     

水溶性高分子聚合物对喹吖啶酮颜料分散体系流变性质的研究

研究了不同类型水溶性高分子聚合物对喹吖啶酮颜料(颜料红122)分散体系流变性能的影响。实验结果表明：加入不同类型高分子聚合物后，颜料红122分散体系的粘度随剪切速率增大而下降，即剪切变稀，采用Herschel—Bulkley模型描述加入不同类型高分子聚合物后颜料红122分散体系的剪切速率—剪切应力变化曲线，并使用稠度系数、流动特性指数和屈服值表征了不同类型高分子聚合物对分散体系流变性能的影响。     

分散剂对分散紫B原染料的分散及染色性能影响

除染料结构类型外,涤纶染色专用分散染料的染色性能在很大程度上还受制于染料的粒径及其分布、分散剂种类等因素。为进一步研究分散剂种类及其拼混比例对所加工染料粒径变化及其染色性能的影响,以蒽醌类结构的分散紫B原染料和不同类型的分散剂为研究对象,对不同种类分散剂与染料以一定比例配比的研磨实验,探讨分散剂类型对分散染料粒径及分布,高温分散稳定性及染色性能等方面的影响。结果表明,分散剂种类及用量对分散染料的粒径大小及其分布,高温分散稳定性以及染色性能影响显著;分散剂MF、分散剂NNO等的分散性能优于非离子型分散剂,如分散剂T-80,部分非离子与阴离子拼混型分散剂有利于提升分散染料高温分散稳定性。同时,减小分散染料的粒径及其提高分布均匀性都有助于其染色性能的改善。     

非离子分散剂的结构对C.I.分散黄64稳定性的影响

分散剂在分散染料加工和应用过程中的作用至关重要.研究了不同种类非离子分散剂对C.I.分散黄64分散稳定性的影响,并探讨了分散剂结构与性能之间的关系,结果表明:分散体系的稳定性与非离子分散剂的亲水亲油性、分散剂与染料颗粒的结合状况有很大关系.合适的亲水亲油性、分散剂疏水部分和染料颗粒结合较牢,有利于提高分散体系的稳定性.因分散剂用量较低,所制备分散体系的高温稳定性主要与非离子分散剂的浊点和其与染料颗粒的结合状况有关.同时,分散体系中加入过量的非离子分散剂将会导致其高温稳定性降低.     

水性超支化聚(酰胺-酯)分散剂在颜料分散中的应用

超支化聚合物的合成与应用是目前研究的热点之一.应用自制的超支化聚(酰胺-酯)分散剂(HPD)制备水性颜料分散体系,研究了分散剂、颜料、分散方法、超声分散时间及添加剂平平加O等条件对颜料分散体系粘度、离心稳定性、粒径及其分布等性能的影响.结果表明:HPD对颜料有较好的分散效果,在HPD用量为15%(对颜料质量),颜料用量2%,超声40 min的条件下,颜料粒径可达217 nm,体系离心稳定性达83.4%,粘度保持在1.88 mPa·s.平平加O作为润湿剂有助于HPD在颜料表面吸附,获得更好的分散稳定效果用量应控制在5%以内.     

有机颜料表面改性及其助剂（二）

２水基印墨或涂料的表面处理２．１表面改性用高分子化合物［２］由于颜料粒子表面极性低 ,不易在水介质中稳定分散 ,限制了使用 ,因此对有机颜料表面改性 ,使颜料粒子表面覆盖某种分散剂或表面活性剂 ,以适应不同分散介质 ,从而改善颜料应用性能。高分子类分散剂通过空间位阻作用可使颜料在水介质中的分散性能有较大提高。如：这些高分子化合物对颜料粒子的非极性侧面具有一定亲和力 ,即非极性锚基吸附在颜料粒子非极性表面上 ,使高能量的极性端基覆盖了非极性、低能量的颜料表面 ,整个颜料粒子显示出更强的极性 ,从而易于分散在水介质中。…     

新型阳离子高分子分散剂的合成与应用

以苯乙烯、4-乙烯基吡啶、甲基丙烯酰氧乙基三甲基氯化铵为原料,采用自由基溶液聚合法合成了含有双锚固基团(苯环和吡啶环)的新型高分子分散剂PSVD.通过FT-IR、1H-NMR表征共聚物的结构,并测定了共聚物的特性粘数与阳离子单体含量.用PSVD对颜料红245进行分散,因双锚固基团的协同作用共同作用于颜料表面能增强对颜料的分散效果,故所制备的阳离子超细颜料分散液粒径＜200 nm,分散稳定性为50.4%.     

影响颜料分散效果的研究

不同颜料的分散性能是不一样的,除了分散剂用量对分散效果产生影响外,分散速度、分散时间、分散液浓度、分散剂种类等都会对分散效果产生影响。着重考虑了二氧化硅与PCC的几个分散条件,在不同条件下分别检验分散效果。     

水性纳米有机颜料的制备及其分散稳定性能的研究

在有机颜料分散过程中添加吸附促进剂,促进高分子分散剂在有机颜料表面吸附,成功制备了水性纳米有机颜料分散体系; 研究了水性纳米有机颜料分散体系的稳定性能.结果表明:在有机颜料分散过程中添加吸附促进剂,可制得分散稳定性能良好的水性纳米有机颜料.水性纳米有机颜料分散体系随着离心时间的延长,吸光度变化较小,仅有极少部分颗粒发生沉降.加热温度在50℃以下,粘度、粒径、Zeta电位基本没有变化;高于50℃后,颜料的性能明显变化,且温度越高变化越明显.将水性纳米有机颜料分散体系稀释32倍,其比吸光度仍高达97.56%,说明纳米颜料分散体系中发生沉降的粒子很少.所制得的水性纳米有机颜料分散体系具有较好的离心稳定性、耐热稳定性和稀释稳定性.     

蛋白质水解度测定方法综述

对目前国内外常用的蛋白质水解度测定方法进行了综述，其中pH—state方法是通过滴定水解过程中释放的质子测定DH；OPA、TNBS及国内常用的水合茚三酮和甲醛等测定方法是利用游离氨基的反应测定DH。     

聚多元羧酸盐的合成及应用

研究了聚多元羧酸盐的合成方法及反应机理,将其应用于洗涤剂和PVC制品中分别代替三聚磷酸钠和邻苯二甲酸二丁酯,证明有良好效果。     

百年风尚

一场流光溢彩、赏心悦目的展览,一段百年风尚演进的传奇旅程,一次东西方文化艺术的完美对话。2013年9月13日,“博萃臻艺一中西方珍宝艺术展”在辽宁省博物馆举行了隆重的开幕仪式,法兰西共和国驻华大使白林女士、辽宁省文物局局长丁辉先生、辽宁省博物馆馆长马宝杰先生、卡地亚全球总裁兼首席执行官邓阁仕先生、卡地亚区域行政总裁（北亚洲）陆慧全先生、卡地亚中国区首席执行官陆意斯先生、辽宁省文物店总经理张春鹰先生,以及众多文化界与文博界的贵宾齐聚一堂,共同见证了这场文化艺术盛事。     

EFFECTS OF TYPES OF FAT AND OF RATES AND TEMPERATURES OF COMMINUTION ON DISPERSION OF LIPIDS IN FRANKFURTERS

ABSTRACT— The effect of time, temperature and rpm of comminution of emulsions was determined on the dispersion of approximately 25% of beef fat, pork fat or cottonseed oil in frankfurters. The numbers of lipid particles 5 μ or less in diameter increased in frankfurters containing either beef or pork fat as comminution was continued to higher temperatures, with pork fat dispersed more thoroughly. Fat tended to separate from frankfurters containing beef fat in particles 200 μ or more in diameter. In contrast, no specific degree of dispersion of particles 5 μ or less in diameter consistently indicated emulsion stability, or its lack. Increased rpm during comminution produced an increased dispersion of beef or pork fat. Under the same conditions pork fat was dispersed more finely than beef fat. Dispersion of cottonseed oil produced finely dispersed particles beyond the resolution of light microscopy, as was confirmed by electron microscopy which showed a substantial number of particles to be less than 1 μ in diameter.     

SEROLOGIC IDENTIFICATION OF SPECIES OF ORIGIN OF SAUSAGE MEATS

SUMMARY: A partially purified immunoglobulin G (lgG) solution prepared from the serum of species to be tested was heated to the specifications for sausages. The resulting supernatant fluid was decanted and the precipitate washed with saline and used to immunize rabbits. The supernatant fluid was used to sensitize tanned sheep red blood cells. The immune serum was rendered monospecific by absorptions with heterologous, heated lgG precipitates. A sample of monospecific immune serum was absorbed with a washed homogenate of sausage. Aliquots of the monospecific immune serum, both untreated and sausage absorbed, were tested with cells sensitized with the homologous heated lgG supematant fluid. A significant reduction of titer by sausage absorption indicated that the sausages contained the meat homologous to the immune serum.     

山药水溶性多糖的提取及抗氧化性研究

研究山药水溶性多糖的提取及其抗氧化作用。方法是将小鼠分别口服给予山药水溶性多糖，每天1次，连续给药15d，取血测过氧化物酶（POD）活性，取血、肝、肾测超氧化物歧化酶（sOD）活性，脂质过氧化产物（MDA）含量。山药多糖物可显著提高POD活性及血、肝、肾的SOD活性，并减少血、肝、肾组织中MDA的含量。山药水溶性多糖有提高小鼠体内过氧化物酶、超氧化物歧化酶活性及减少脂质过氧化产物的抗氧化作用。     

BASIS OF STABILITY OF AMINE SALTS OF LINOLEIC ACID

SUMMARY— The mechanism and generality of the known stabilization against autoxidation conferred on linoleic acid by certain basic amino acids, such as lysine and arginine, was investigated. Basic amino acids were the only class of compounds found to confer the effect. However, the smallest basic amino acid, 2,3-diaminopropionic acid, was not effective, nor was αβω-diaminc acid, 3,6-diaminohexanoic acid, although a simple isomer of lysine. The stabilization was observed only in the solid phase. Inclusion of sodium chloride in the solid matrix was deleterious to the effect. A large number of physical and chemical observations were made and correlated but it has not been possible to draw detailed conclusions about the mechanism of stabilization, nor can a detailed structure of the stabilized complex be suggested. The cause of the phenomenon appears to be closely associated with the physical arrangement of the ions in the crystal lattice.     

STABILITY OF AQUEOUS EMULSIONS OF THE ESSENTIAL OIL OF HOPS

Hop oil emulsions prepared from different varieties of hops have been found to exhibit enhanced physical stability on the addition of blends of the emulsifiers Span 20/Tween 80 or Span 60/Tween 60. Examination of the particle size and volume distributions of an emulsion by use of a Coulter Counter was found to be an excellent method of monitoring its stability. An indication as to the relative efficiency of emulsifiers can be obtained from Coulter Counter measurements on hop oil emulsions after storage for 4 days. The use of an ultracentrifuge provies a rapid means of testing emulsion stability and hence the effectiveness of emulsion stabilizers.     

矩阵乘积的行式,列式

给出了ｍ×ｍ矩阵与ｍ×ｎ矩阵的行（列）式的表达式．若Ａ＝ａ１１ａ１２…ａ１ｍａ２１ａ２２…ａ２ｍ……ａｍ１ａｍ２…ａｍｍＢ＝ｂ１１ｂ１２…ｂ１ｎｂ２１ｂ２２…ｂ２ｎ……ｂｍ１ｂｍ２…ｂｍｎ分别是ｍ×ｍ，ｍ×ｎ矩阵，则｜Ａ｜｜Ｂ｜＝｜ＡＢ｜＋∑ｉ１＜ｉ２＜…＜ｉｔｊ１＜ｊ２＜…＜ｊｔ１≤ｔ≤ｍｎ－ｔ≥ｍＮＢｉ１ｉ２…ｉｔｊ１ｊ２…ｊｔＮＡＢ１…ｍ（－１）ｓｔ＋１ｊｔ＋１…（－１）ｓｎｊｎ其中ｉ１，ｉ２，…，ｉｔ是１，２，…，ｍ中ｔ个数码；ｊ１，ｊ２，…，ｊｔ，ｊｔ＋１，…，ｊｎ是１，２，…，ｎ的一个排列；ｓｒ＝π（ｊ１，ｊ２，…，ｊｔ，ｊｒ）（ｒ＝１，２，…，ｎ）是排列ｊ１，ｊ２，…，ｊｔ，ｊｒ的反序数．     

DEVELOPMENT OF CHAINS OF CELLS OF SACCHAROMYCES CEREVISIAE DURING FERMENTATION

The lengths of chains of cells of Saccharomyces cerevisiae were studied during fermentation. Pitching yeast generally contained about half of the total number of cells as two-celled chains. The chain lengths varied during the subsequent fermentation and the variations were characteristic of the strain. Electronic counting assessments of chain length were unreliable.