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pdl PDL =poverty datum line 〔英國〕...

Based on the “ self - migrating and surface - segregation “ behavior , the amphiphile segregation surface was therefore constructed on hydrophobic pdl - la matrix , which containing the structure of peo spacer combining cell adhesion ligands to mimic the extracellular matrix ( ecm ) 基于兩親共聚物在疏水高聚物材料內的自遷移和表面富集行為,在聚乳酸材料上構建了以peo橋聯氨基酸或整合素配體多肽片段的類細胞外基質表面。

Based on the “ self - migrating and surface - segregation “ behavior , the amphiphile segregation surface was therefore constructed on hydrophobic pdl - la matrix , which containing the structure of peo spacer combining cell adhesion ligands to mimic the extracellular matrix ( ecm ) 基于兩親共聚物在疏水高聚物材料內的自遷移和表面富集行為,在聚乳酸材料上構建了以peo橋聯氨基酸或整合素配體多肽片段的類細胞外基質表面。

pdp

The chondrocyte and osteoblast cytocompatibility test on amphiphilic copolymer - amino acid ( rgd ) hybrid modified pdl - la membranes showed that : the cell attachment , growth and activity were promoted on pdl - la membranes modified by amphiphilic copolymer with alkaline amino acids ( arginine and lysine ) and rgd end . the result also showed the effect of peo chain length of amphiphilic copolymer on cell attachment and growth 在兩親共聚物-氨基酸( rgd )修飾的聚乳酸平面材料上的軟骨細胞和成骨細胞相容性測試結果表明:以堿性氨基酸及rgd為活性端基的兩親共聚物改性聚乳酸體系,對細胞的粘附、生長及活性均有明顯的促進作用。

Three kinds of cytocompatible surfaces on poly ( dl - lactide ) ( pdl - la ) tissue engineering matrix were designed and studied in this dissertation , to promote the cytocompatibility of the pdl - la material . the cytocompatibility test was then performed on modified pdl - la tissue engineering matrix using chondrocyte and osteoblast 本論文針對目前聚乳酸組織工程材料存在的細胞相容性問題,對聚乳酸材料進行了三種不同類型的促細胞相容性表面設計與研究,并對促細胞相容性表面修飾的聚乳酸組織工程材料進行了軟骨細胞和成骨細胞相容性測試。

With reference of the materials about passenger dedicated lines ( pdl ) in foreign countries , the essay discusses the characteristics and composition of transportation cost of railway pdl , and analyzes the influence on transportation cost from two aspects as target value of speed and passenger traffic volume , so as to illuminate that the target value of speed can directly affect the transportation cost of pdl , and the fix cost has nothing to do with the passenger traffic volume , whereas the variable cost is in direct proportion to that 摘要借鑒國內外客運專線資料,對鐵路客運專線運輸成本的特性及構成進行論述,并從速度目標值與客運量兩方面分析對運輸成本的影響,說明速度目標值直接影響客運專線的運輸成本,而固定成本與客運量無關,變動成本與客運量成正比變化。

The self - segregation behavior of amphiphilic copolymer on pdl - la scaffold was investigated via fluorescence - labeling technique . the modified scaffold with hydrophilic surface will not only favor the penetration of cell suspension and culture medium , but also provide the microenvironment for the growth of cells with the peo spacer combining amino acid ( rgd ) structure . according the above result , the cytocompatibility test was also performed on pdl - la 3d scaffold modified by amphiphilic copolymer with alkaline amino acid end 這種親水表面不僅有利于細胞懸液和培養介質的進入,并可以通過peo橋聯的氨基酸( rgd )為細胞在三維多孔支架內的生長提供類細胞外基質環境;根據以上結果,本文對堿性氨基酸為peo鏈端基的兩親共聚物-氨基酸類細胞外基質修飾的聚乳酸三維支架進行了細胞相容性的測試。

In the beginning , the working principle , testing and data processing system of pdl micro - control material test machine is introduced ; then more attention is paid to the hardware system which is composed of high precision raster linear displacement sensor , high precision force sensor , the digital displaying sets , the interface equipments and the controlling circuits etc to perform the data collection and ensure the testing precision of the whole system 論文首先介紹了pdl材料拉伸試驗機的工作原理、測試及數據處理系統;接著詳細介紹了由高精度光柵線位移傳感器和壓力傳感器、數顯裝置、接口裝置及控制電路等組成的新的硬件系統,來完成數據采集,并保證整個系統的測試精度要求。

The study of in - situ construction of cytocompatible surface on pdl - la matrix via amphiphile - amino acid ( rgd ) hybrid self - segregation - the amphiphilic diblock copolymer , poly ( dl - lactide ) - poly ( ethylene oxide ) ( pla - peo ) copolymer , containing hydrophobic pla block and hydrophilic peo block was synthesized via coupling method in this dissertation . cell - adhesion - promoting amino acids and integrin receptor peptide rgd were then immobilized at the end of peo chain of pla - peo copolymer via hydroxyl group activation technique . the solvent blending and casting method was then used to obtain the amphiphile modified pdl - la membranes 兩親共聚物-氨基酸( rgd )雜化體原位自修飾構建聚乳酸細胞相容性表面的研究一本論文首先設計并合成了一類含疏水聚乳酸( pla )鏈段和親水聚氧乙烯( peo )鏈段的兩親嵌段共聚物材料( pla - peo ) ,利用peo鏈端的活性官能團羥基固定了促細胞粘附的氨基酸及整合素配體多肽片段rgd 。

But the result showed that the osteoblast differentiation was not promoted significantly in the amphiphilic - amino acid modified pdl - la scaffold . the study of cytocompatible surface construction on pdl - la matrix via biomacromolecules entrapment - different polysaccharides ( alginate and chitosan ) were combined with 軟骨細胞的細胞粘附率、增殖率和細胞活性以及細胞形態的實驗結果表明,聚多糖及其氨基酸衍生物改性的聚乳酸表面能明顯促進軟骨細胞的粘附與生長,并具有較高的細胞活性。

By introducing advanced pdl technology from new zealand and relying on the numerous electric suppliers and a skilled workforce in dongguan , the factory focuses its production on lv terminal electrical accessories such as wall switches , sockets and etc . , so as to enhance our competitiveness and consequently fill the gap in this field 該廠引進新西蘭pdl的先進技術,利用東莞當地眾多的電子元件供應商優勢及人才優勢,主要生產墻壁開關、插座等低壓終端電氣配件,填補了施耐德電氣產品在低壓終端產品在這一領域的空白,從而增強整體競爭優勢。

The total protein content , total dna content and cell activity test results showed high proliferation ability and cell activity of the osteoblast in modified pdl - la scaffold . it also showed good cell affinity to the modified pdl - la scaffold investigated by sem test 成骨細胞在原位自修飾聚乳酸三維支架內的蛋白質含量、 dna含量和細胞活性測試結果表明,成骨細胞在原位自修飾的聚乳酸三維支架內有較高的細胞活性和較強的分裂增殖能力。

In dwdm system , awg is the most promising wavelength multi / demultiplexer , and what influence the performance of awg most is the structure design and device processing . awg ' s performances are crosstalk , insertion loss , temperature shift and pdl ( polarization dependence loss ) 在dwdm系統中,陣列波導光柵( awgarrayedwaveguidegrating )是最具應用前景的波分復用解復用器,影響awg器件性能的關鍵因素是它的結構設計方案和工藝制作過程。

Based on the “ self - migrating and surface - segregation “ behavior , the amphiphile segregation surface was therefore constructed on hydrophobic pdl - la matrix , which containing the structure of peo spacer combining cell adhesion ligands to mimic the extracellular matrix ( ecm ) 基于兩親共聚物在疏水高聚物材料內的自遷移和表面富集行為,在聚乳酸材料上構建了以peo橋聯氨基酸或整合素配體多肽片段的類細胞外基質表面。

The newborn ultra86 series , designed by pdl in new zealand , is expected to launched in january 2003 . and in the near future , new series of customized products and the advanced - intelligent electric accessories will come into the market in succession 由新西蘭pdl公司設計的第一批產品ultra86系列于2003年1月開始供貨,今后還將會有客戶定制產品、智能化電氣配件等新的產品系列陸續推出。

The results of attenuated total reflectance - fourier transform infrared ( atr - ftir ) , x - ray photoelectron spectroscopy ( xps ) and contact angle measurement showed that the amphiphilic copolymer could self - segregate on the hydrophobic pdl - la surface 利用衰減全反射傅立葉轉換紅外光譜( atr - ftir ) 、 x -射線光電子能譜( xps )分析以及接觸角測定對改性聚乳酸材料表面進行了表征。

It not only can easily process pdl documents with abundant special fonts , charts , artistic lines and semi - hues , but also has high - speed , high - efficiency chromatic working capability and outstanding document representing capability 它不但能夠輕松地處理含有大量特殊字體圖表藝術線條和半色調內容的pdl文件,還擁有高速高效的套色作業能力以及杰出的文件表現力。

It also showed good cell affinity to the modified pdl - la scaffold investigated by scanning electronic microscopy ( sem ) and confocal laser scanning microscopy ( clsm ) , comparing with the unmodified pdl - la scaffold 掃描電鏡和激光共聚焦顯微鏡的測試結果顯示了軟骨細胞在原浙江大學博士學位論文( 2003 )位自修飾的聚乳酸三維支架內部良好的粘附與生長情況。

The result of water - binding ability test including water - retention ability , especially water - adsorption ability , showed great enhancement of hydrophilicity of the modified pdl - la scaffold , which would favor for the 3d cell culture 該改性技術可顯著提高聚乳酸支架的親水性,尤其可顯著提高聚乳酸支架的吸水能力,非常有利于三維支架的細胞培養。

Combining the surface self - segregation behavior of amphiphile and salt - leaching technique , the ecm - like surface , with peo spacer combining amino acid ( rgd ) , was successfully constructed in - situ on pdl - la 3d tissue engineering scaffold 本論文的實驗結果在peo鏈長為2000分子量時對軟骨細胞的粘附與生長有最佳的作用。