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丙交酯

与 丙交酯 相关的网络例句 [注:此内容来源于网络,仅供参考]

Before degradation: limpid stereo reticular structure of PLGA; One week after degradation: PLGA was corroded and the reticular structure was decreased; Three weeks after degradation: airspace was gradually disappeared and the reticular structure was further decreased; Five weeks after degradation: airspace and the reticular structure were completely damaged, which was in an indefinite form.

降解前PLGA(丙交酯和乙交酯的摩尔比为90∶10)支架材料呈清晰的三维立体网状空隙结构;降解1周后,材料表面受侵蚀,网状结构减少,孔洞局灶性连接呈片状;3周时材料表面受侵蚀现象加重,空隙逐渐消失,网状结构进一步减少,聚合物融合呈大片状;5周后材料空隙、网状结构完全消失,呈不定型均质状。

Second, the commonly used ring-opening polymerization between glycerol and lactide for the preparation of degradable polyurethane network was replaced with the more simple and economic method, which is polycondensation between lactic acid and glycerol.

其次,我们用乳酸和丙三醇的直接缩聚代替常用的较为复杂的丙交酯和丙三醇的开环聚合法用于可降解聚氨酯交联网络的制备。

The lactide was characterized by IR, 1H-NMR, MS, elemental analysis and Ultraviolet spectrophotometry.

考察了蒸馏工艺、催化剂种类对乳酸脱水效率的影响;用IR、1HNMR、MS、元素分析、紫外光谱分析对丙交酯进行了表征;并考察了丙交酯在不同溶剂中的溶解性。

Experimental materials: American NPG alloy,β-tricalcium phosphate, calcium phosphate cement, poly-lactic-co-glycolic acid and polytetrafluoroethylene.

实验材料:美国NPG黄合金块、β-磷酸三钙、固化的磷酸钙骨水泥、聚丙交酯乙交酯及聚四氟乙烯。

Objective To evaluate the biocompatibility of poly (lactic acid/glycolic acid/asparagic acid-co-polyethylene glycol) tri-block copolymer in vitro.

目的 对自主研制的三嵌段骨基质材料-聚丙交酯/乙交酯/天冬氨酸-聚乙二醇的体外生物相容性进行评价。

Objectives: To investigate the effects of adhesion and proliferation of bone mesenchymal stem cells in the surface of lactic acid/glycolic acid/asparagic acid-co-polyethylene glycol PLGA- tri-block polymer scaffolds, try to find a new biomaterial to induce seed cells in vitro for bone tissue engineering.

目的:探讨大鼠骨髓间充质干细胞BMSCs在聚丙交酯/乙交酯/天冬氨酸-聚乙二醇三嵌段多元共聚物 PLGA-表面粘附、增殖的情况,为组织工程学体外诱导种子细胞生长提供新的生物材料。

Methods Autologous BMMSC of New Zealand rabbits were acquired and induced into chondrogenic differentiation by adding transforming growth factor-β1 (TGF-β1), dexamethasane and ascorbic acid in vitro. Then the chondrocytes were implanted onto novel polymeric scaffolds made by Poly (dl-lactide-co-glycolide) embedding with chitosan nonwoven cloth. The tissue engineering cartilaginous grafts composed of chondrogenetic BMMSC/scaffolds were finally transplanted into the defects of ear cartilage in rabbits of the experimental group.

取新西兰大白兔BMMSC体外培养扩增,以含转化生长因子(TGF-β1)、地塞米松和维生素C的培养液做诱导培养,实验组以诱导后的软骨细胞与聚丙交酯-乙交酯共聚物Poly(dl-lactide-co-glycolide)包埋甲壳胺无纺布的新型支架形成复合物修复兔自体耳廓软骨缺损;对照组以PLGA/甲壳胺无纺布支架修复兔耳廓软骨缺损。

Specific drug–polymer interactions are engineered by optimizing the lactide to glycolide ratio and including specific polymer end groups.

通过优化丙交酯与乙交酯比例及加入特殊的聚合物末端基来获得特殊的药物-聚合物间相互作用。

Lactide, glycolide or caprolactone, biodegradable polyester and diisocyanate as materials are first bulk melt polymerized to prepare the degradable polymer with thermal deformation transforming temperature of about 37 deg.c. The obtained material is processed at temperature over melting temperature so as to shape into spiral rack, applied with stress at temperature higher than Ttrans to form shape easily operational handling and frozen to eliminate stress into the product.

本发明以丙交酯、乙交酯或己内酯,生物可降解聚酯及二异氰酸酯为原料,通过本体熔融聚合制备得到热致形变温度转化点在37℃左右的可降解高分子材料,将得到的材料在熔融温度以上进行加工、赋形制作成用于不同管腔内的螺旋管状支架;在T>T trans 条件下施加应力,加工为便于手术操作的形状;冷冻定型消除应力,即得产品。

The PDLLA with a viscosity average molecular weight beyond 20×10~4 was obtained under the optimum synthesis conditions of the lactide after being recrystallized 4 times as the monomer,the vacuum level of 0.098 MPa,reaction temperature of 150-160 ℃,reaction time of 6-8 h,and using 0.1%-0.18% stannous octoate as catalyst.

实验结果表明,重结晶4次后的丙交酯作为单体,在辛酸亚锡摩尔分数为0.1%—0.18%,真空度0.098 MPa,聚合温度150—160℃下聚合6—8 h可获得粘均相对分子质量Mη大于20×104的聚D,L-丙交酯

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