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Novel chitosan derivative with long alky groups as the hydrophobic moieties and carboxymethyl groups as the hydrophilic moieties was synthesized. The chemical structure of N-octyl-O, N-carboxymethyl chitosan was characterized via FTIR, 1H NMR and elemental analysis. The physical properties were analyzed with wide angle X-ray diffraction and differential scanning calorimetry.

以天然可生物降解的壳聚糖为原料,通过在壳聚糖6位羟基上引入羧甲基,在2位氨基上引入疏水烷基链,制得N-辛基-O,N-羧甲基壳聚糖两亲性衍生物,分别用FTIR、1H NMR和元素分析等技术对其结构进行表征,用广角X射线衍射和差示扫描量热法对具物理性质进行分析,并考察其在各种溶剂中的溶解性能及其对难溶性药物的增溶能力。

Methods:Pre-revision radiographs of 39 aseptically loosened hip prostheses were observed.The incidence of liner and expansile osteolysis around components was statistically determined according to different site and fixation manner.The width or area of osteolysis waw measured.

观察因无菌性松动行翻修术的39个国产人工髋关节术前X线片,按部位及固定方式分组统计假体周围不同区域衬性和膨胀性骨溶解的发生率,并测算溶骨带宽或溶骨面积。

Semifluid mixtures of organic compounds consisting of resins dissolve d in a volatile oil, turpentines can be distilled into the volatile oil of turpentine and the nonvolatile rosin.

它是半流质的有机化合物,由树脂在挥发性油中溶解而成,松脂可以被提炼成松脂挥发油和非挥发性松脂。

Methods The expression of HSP-27 in human lenses was assayed using Weatern Blotting on 17 cases with old aged cataract and 7 normal human lenses.

方法采用免疫印迹法检测17例老年性白内障和7例正常人水溶性、水不溶性及SDS溶解的晶状体中的HSP-27含量。

This indicates that both the reductive dissolution of ferrihydrite and the reductive desorption of As occurred in the batches incubated with arsenicresistant denitrificator and Asadsorbing ferrihydrite.

这说明,体系中水铁矿的还原性溶解和As的还原性解吸已经发生。

Microscopically visible particles differ in colour, texture, uniformity and in water solubility and absorption

显微镜见到的粒子,在颜色、组织结构、均匀性以及对水的溶解和吸附性方面都各不相同。

Oncosis is a special mode of non-apoptotic cell death,it is characterized by cellswelling,budding,organelle swelling,increased cellmembrane permeability and caryolysis.

胀亡是一种特殊形式的非凋亡性细胞死亡方式,它的特征性表现为细胞肿胀、起泡、细胞器肿胀、细胞膜通透性增加和核溶解。胀亡理论的提出为临床医学的发展提供了良好的机遇和理论指导。

A continuous increase in FS increased L value, A-lys, SF, pressure and torque; but decreased TI, NSI, WHC and OAC; chewness increased from 4r/min to 8r/min, but decreased rapidly when FS raised from 12r/min to 16r/min, there was a little change between 8r/min and 12r/min, there was also changed unsignificantly between 16r/min and 20r/min.

随着喂料速度的升高,产品的亮度指数、有效赖氨酸含量、剪切力、压力和扭矩逐渐升高;组织化度、氮溶解指数、水分保持能力和吸油性逐渐下降;当喂料速度由4r/min升高至8r/min时,咀嚼性逐渐升高,由12r/min升高至16r/min时,咀嚼性迅速降低,8r/min与12r/min之间变化很小,16r/min与20r/min之间变化很小。

METHODS: The rhBMP-2,expressed in Escherichia coli, was washed by Triton X- 100 and further purified by DEAE chromatography.The inclusion bodies were resolved in 8 mol/L urea, and were refolded and dimerized in the redox systems (reduced and oxidized glutathione). Finally, a one - step purification procedure based on the heparin affinity chromatography was implemented. The biological activity of purified rhBMP - 2 were tested by induction of the alkaline phosphatase activity in C2C12 cells.

在大肠杆菌中通过温度诱导表达重组人骨形成蛋白-2经过Triton X-100清洗之后,又通过DEAE离子交换层析纯化包涵体,包涵体在8 mol/L尿素变性溶解,在氧化-还原(还原型和氧化型谷胱甘肽)复性系统中,通过简单的稀释复性,通过肝素亲和层析一步纯化法纯化重组人骨形成蛋白-2,最后通过诱导C2C12细胞产生碱性磷酸酶检测重组人骨形成蛋白-2活性。

Vitamins can be grouped according to the substance in which they are soluble: fat-soluble and water-soluble.

按维生素的溶解环境,维生素可以分为两大类:脂溶性和水溶性。

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。