The degradation of PLLA fibers was the main reason of the release.

PLLA纤维的降解速度是药物释放的主导因素。

The results showed that the graft copolymers had short PLLA and PGA lateral chain.

结果表明，接枝共聚物具有较短的聚l -丙交酯(PLLA)和聚乙交酯(PGA)侧链。

The glass transition temperature of PLLA decreased with the increase of cooling rate.

玻璃化温度和结晶度随着降温速率的降低而增大。

The surface roughness and hydrophilicity of the PLLA-PDXB composite were obviously enhanced.

复合材料的亲水性和粗糙度明显增加。

The results showed that no esterification occurred during the melting spinning of PGA and PLLA.

结果表明：PGA和PLLA在熔融纺丝时，没有发生反应。

"PLLA is biodegradable and after six to 12 months the PLLA would be resorbed and replaced by host tissue."

“丙交脂是生物可降解物质，六至十二个月后，丙交脂就会被再吸收，并由宿主机体组织所代替。”

PLLA/starch composites were prepared by microwave melt-blending method from L-lactic acid (LLA) and starch.

以L-乳酸和淀粉为原料，采用微波熔融共混法，制备出PLLA/淀粉复合材料。

The incorporation of inorganic particles into the PLLA fibrous matrixes could improve their mechanical properties.

无机粒子的复合改善了单纯PLLA纤维支架的力学性能和生物相容性。

Experimental results show that high molecular weight PLLA can be obtained by control of the polymerization conditions.

研究结果表明：通过对聚合时间以及引发剂用量的控制，合成出高分子量聚l -乳酸。

Abstract:Objective To study the characters of degradation of poly-L-lactic acid (PLLA) internal fracture-fixing system.

目的：观察聚左旋乳酸（PLLA）微型接骨板固定家犬下颌骨骨折时的降解特性。

The results showed that concentration of pentaerythritol and polymerization time play a key role on molecular weight of PET-PLLA.

结果表明，醇的加入量和聚合时间对PET - PLLA分子量大小起决定性作用。

Poly(L-lactide)(PLLA) was synthesized by ring-opening polymerization of L-lactide using cyclic tin alkoxide compound as initiator.

以环烷氧锡化合物引发L-丙交酯开环聚合制备高分子量聚L-乳酸。

To explore the clinical effect of poly-L-lactic acid (PLLA) screws and rods fixation in the treatment of intra-articular fracture.

探讨聚- L -乳酸(PLLA)钉棒内固定治疗关节内骨折的临床效果。

The preparation, modification, and cytocompatibility of poly-L-lactic acid (PLLA) scaffold for cartilage tissue engineering were studied.

研究了聚- L -乳酸(PLLA)软骨组织工程支架的制备、改性及细胞相容性。

Methods 12 cases of posterior acetabular margin fractura were treated with SR-PLLA screws. 4 cases complicated with femoral head fractura.

方法应用自身增强可吸收（SR-PLLA）螺钉内固定治疗髋臼后缘骨折12例，其中4例合并股骨头骨折。

When PLLA pins are used, drills and screws may skirt or even go partially or completely through the pins without compromising the reduction.

当应用plla针时，钻孔或旋进螺钉可能会绕开可吸收针，即使部分或完全穿过可吸收针也不会影响复位。

When gelatin content is less than 5%, blending films not only retains a good mechanical property, but also improves the hydrophilicity of PLLA.

共混膜中混入的明胶含量在5%以内时，在保持聚乳酸力学性能的同时，可以降低聚乳酸的接触角，改善聚乳酸的亲水性。

As a biodegradable material, poly (L-lactic acid, PLLA) has drawn more attention because of the decrease of resource and the serious pollution.

随着资源的减少和白色污染的加剧，作为生物可降解材料的聚l -乳酸(PLLA)引起了世人的广泛关注。

ML-PLLA was synthesized by ring-opening polymerization of L-lactide in the presence of mannitol, it has the characteristic of low melt viscosity.

丙交酯在甘露糖醇分子上引发聚合得到的ML—PLLA具有低熔体粘度的特性。

Conclusion Solid-compression process could obtain high initial and retention strength PLLA which could fit for the general bone internal fixation.

结论：固态压缩法可获得高初始强度和维持强度的PLLA，满足一般的骨内固定要求。

Liquid crystalline PLLA polymer shows the characteristics of both thermodynamic stability of polymer and orientational ordering of liquid crystal.

液晶高分子同时具有聚合物的稳定性和液晶的取向有序性。

The preparation, degradation, and cytocompatibility of poly-L-lactic acid (PLLA) scaffold for cartilage tissue engineering were studied in this thesis.

本文以聚- L -乳酸(PLLA)为原料，研究了多孔支架的制备、体外降解和软骨细胞的相容性。

To investigate the delayed release effect and the availability of the paclitaxel-loaded PLLA-PEG750 ultrafine fibers on ovarian cancer SKOV3 cell line.

探讨担载紫杉醇纤维毡对卵巢癌细胞SKOV3的缓释效应及作用的有效性。

The PLLA membrane was immersed in hydrogen peroxide solution under UV-light to introduce the macromolecular hydroperoxide groups on the membrane surface.

采用过氧化氢溶液中紫外光氧化的方法在PLLA膜表面引入了大分子过氧化氢基团。

Poly (L-lactic acid) (PLLA) was directly prepared through melt polycondensation started from industrial L-lactic acid under continuous microwave irradiation.

连续微波辐射条件下，以工业l -乳酸为原料，直接熔融缩聚合成聚l -乳酸(PLLA)。

Hydrophobic PLLA that is incorporated into the gene delivery vector is believed to enhance the cell interactions and tissue permeability of the delivery system.

将疏水性的PLLA掺合入基因转运载体后，能增强递药系统的与细胞的相互作用和组织渗透性。

Then, the composites of CS fiber before and after entrapment process and PLLA were prepared by molding press. The compatibility of CS fiber with PLLA was studied.

在此基础上，利用模压成型法制备了修饰前后的CS纤维与左旋聚乳酸(PLLA)复合材料，并对CS纤维和基体plla之间的相容性进行了分析。

Objective To prepare an ultrasound microbubble contrast agent using PLLA-PEG-PLLA copolymer as the shell material, and test their acoustic characteristics in vitro.

目的用PLLA - PEG - plla共聚物为外壳材料制备微泡造影剂，建立体外声学性质测定装置和方法。