法位

The factors affect on the degree of substitution of product, yield and apparent viscosity, such as the mol rates of EPTAC with -NH2, reaction temperature, reaction time and the content of water in system have been discussed in detail. FTIR spectrometer and UV spectrometer are used to characterize the structure of the derivative and it is proved that substitution reaction mainly occurs on the -N element .The particle size and morphology of chitosan and quantemary ammonium salt of chitosan are analysised by comparing photos of their scanning electron microscope. The degree of substitution of HACC is determined by acid -base conductometric titration. An error in current formula of DS has pointed out and a correct formula has presented.On the base of experience of above experiment, the reaction conditions of HACC were systematically investigated through orthogonal design, and then the best conditions are found. Water-solubility and dependence of pH are studied.

壳聚糖和环氧丙基三甲基氯化铵在异相条件下发生反应，通过单因素实验，制备了一系列不同性能的壳聚糖季铵盐，本文首次详细讨论了反应条件(反应摩尔比、反应时间、反应温度、水含量)对产率及产物性能的影响；用红外光谱和核磁共振对结构进行表征分析时，发现季铵盐阳离子基以N位上取代为主；通过电镜图片对壳聚糖和季铵盐衍生物外观形貌进行对比，采用酸碱电导滴定法测定产物的取代度，并对常用取代度公式做了修正。

These changes are called coseismic Coulomb stress changes. They can be calculated by the static dislocation theory in elastic infinite half-space and the boundary element method.

断裂相互作用产生的同震库仑应力改变可以用边界元法和弹性半无限空间中的位错理论进行求解。

MERLE HAZARD, an unusually satirical country and western crooner, has captured monetary confusion better than anyone else.

摩尔。哈萨德是一位特会挖苦人的、以柔声法唱乡村歌曲及西部歌曲的歌手。他比任何别人都更好地抓住了当下货币政策混乱的实质。

Papers out Saturday suggested the Iron Lady embarked on the eggy crash diet to get in shape ahead of the 1979 election when she was elected British prime minister.

这份资料显示，这位一九七九年当选英国首相的「铁娘子」在大选前，为了保持身材，力行鸡蛋减肥法。

Quantum chemical calculations were performed based on these conformations to explain the experimental data. 4. The molecular recognition of the chiral Salen Fe complexes towards imidazole derivatives and the measure of the equilibrium constants of host-guest system of the Salen Fe and EMIm a.

用紫外-可见光谱滴定法考察了不同主体Salen-Fe对咪唑及其衍生物的分子识别行为，测定了识别过程的平衡常数和热力学参数，讨论了影响主客体配位能力的有关因素；系统地考察了主客体缔合反应的圆二色光谱性质。

In Granards' reactionof fluorinated β-ketophosphonium salts we found differentGranard reagents give different reaction mechanisms andPhMgBr realized the enolate reaction of fluorinatedβ-keto-phosphonium salts.

在研究含氟β-酮基鏻盐的β位亲核加成反应中，我们利用含氟α-烷氧基-β-酮基鏻盐与有机锂试剂的亲核加成反应一锅法高度立体选择性地合成了E式或Z式三氟甲基的烯醚类化合物。

Methods Immunohisto-chemical S-P method was employed to detect the expression of MMP-2in30specimens of ectopic endometrium and entopic endometrium of adenomyosis and16specimens of normal endometrium.

目的 研究基质金属蛋白酶（MMP-2）在子宫腺肌病中的表达，探讨其表达与子宫腺肌病的发生及痛经的相关性方法应用免疫组化SP染色法检测30例子宫腺肌病在位内膜、异位内膜及16例对照组子宫内膜MMP-2的表达。

On the silicon substrate an epitomical layer is made,where IC components are formed subsequently.In an CVDprocess,the silicon substrates places in a vacuum crystal tube are first heated to 1,600°C by high-frequency radio power and then H⒉Cl⒉Si and certain gaseous compounds of As or P is injected into the tube to make a deposit of several um on their surface.Ions of As or P are impurity deliberately added to the singl-crystalline silicon structure to supply electrons that transmit "negative"current in the silicon crystals,which is called n-type silicon.Bcan be added as impurity to produce p-type silicon that supplies holes for transmitting "positive"current.Whether a p--type of an n-type silicon substrate is needed depends on what type of transistors is expected to be manufactured on it:n-p-n type of p-n-p type

对硅衬底上的一个epitomical层了，而IC零件形成subsequently.in一个CVD法（化学气相depsition ）过程中，硅衬底的地方在真空晶体管均先加热至1600 ° C时，由高频率的无线电功率，并然后h ⒉氯⒉硅和某些气态的化合物，砷或P ，是注入试管，使存款的几位嗯对他们surface.ions的作为或P是杂质刻意添加到单结晶硅的结构，以供应电子传递的&负面&目前，在硅晶体，即所谓N型silicon.b ，可以增加一条，作为杂质产生的p型硅供应孔转递&积极& current.whether一个P -类型的一个n型硅衬底，是需要靠哪些类型的晶体管预计将在制造上它： NPN型的PNP型

He may be right: someone claiming to be from La Familia called a television station to propose a truce with the government.

他也许是对的：某位自称是拉法米家族成员的人给电视台打电话想要和政府和解。

To investigate the presence of specific adhesion activity, the mrkD adhesin gene of the established type 3 fimbriae expression system was replaced respectively by each of the fimbrial adhesins. Transmission electron microscopy and western blot analysis revealed that most of the recombinant type 3 fimbriae expressed and assembled properly.

位於纤毛末端的黏附蛋白为决定细菌黏附专一性的主要因子，为了测试黏附蛋白的活性，我们进一步以过去建立的第三型纤毛表现系统为平台，将MrkD黏附蛋白基因分别置换为kpa、kpb、kpc、kpd、kpe、kpf或kpg的黏附蛋白基因，并经西方墨点法确认这些重组第三型纤毛的结构蛋白的表现和组装正常。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。