CaO—SiO2—P2O5—H2O体系中CBC材料的水化产物：（一）水化产物组成

利用ＸＲＤ和ＳＥＭ－ＥＤＳ等测试技术对ＣａＯ－ＳｉＯ２－Ｐ２Ｏ５－Ｈ２Ｏ系统中ＣＢＣ材料的水化产物组成进行了研究，结果表明：随水化进行，ＯＨＡＳｐ，β－Ｃ２Ｓ和β－Ｃ２Ｐ的量均减少，水化３６５ｄ时，体系中出现了一些不知归属的衍射线，三强线为：０．２０９２（１００），０．８２１６（５６），０．３０９１（４１）。此外在水化产物中出现了两种不知名的水化磷酸：７ＣａＯ．３Ｐ２Ｏ５．ｘＨ２Ｏ和６ＣａＯ．Ｐ２     

发泡法制备TCP陶瓷的工艺及其结构与性能研究

研究了用发泡法制备生物降解磷酸三钙（ＴＣＰ）陶瓷的工艺，并讨论了这种材料的结构及性能．有关性能测试表明：材料表面及内部均匀分布着１００～８００μｍ的气孔，气孔率为４５～５０％，抗压强度为１５ＭＰａ，材料在模拟体液中有一定的溶解性。ＳＥＭ，ＸＲＤ及ＩＲ光谱测试结果表明：材料内部有很多连通孔隙，颗粒间的连结为颈部连结；材料的主晶相是β－Ｃａ３（ＰＯ４）２（β－ＴＣＰ），此外还存在部分非晶相。动物实验结果表明：材料植入体内，经过一段时间发生一定量的降解．     

热致性液晶共聚酯（60PHB／PET）和聚酰胺6（PA6）的原位复合增…

在热致液晶性６０ＰＨＢ／ＰＥＴ共聚酯（ＬＣＰ）与聚酰胺６（ＰＡ６）的共混体系中引入了增容剂；讨论了增容剂对ＰＡ６／ＬＣＰ原位复俣材料的微观结构和界面性能，结晶行为、流变行为，以及力学性能的影响。     

镓─铬蓝黑B络合物吸附波的研究及应用

在（ｐＨ３．８０的０．４４ｍｏｌ／ＬＨＡＣ－０．０８ｍｏｌ／ＬＮａＡＣ缓冲浴液中，铬蓝黑Ｂ在－０．３９Ｖ（ｖｓ．ＳＣＥ）处有一还原波Ｐ１，当加入Ｇａ（Ⅲ），峰电位移至－０．４０Ｖ（ｖｓ．ＳＣＥ），峰电流显著增加．在０．２－５μｇ／２５ｍｌ范围内，峰电流与Ｇａ（Ⅲ）浓度成正比．检出限为４ｎｇ／ｍｌ．本文对电极反应机理行研究，证明该极谱波属络合物吸附波．方法已用于测定铝箔、矿石中微量镓，结果满意．     

β－Ca_3（PO_4）_2陶瓷人工骨的组成与结构特征

通过对人体骨盐成分及骨显微结构的分析．选择磷酸盐系统的β－Ｃａ３（ＰＯ４）２（简作β－ＴＣＰ）陶瓷作为人工骨材料。采用合适的粘结剂、成孔剂和烧结工艺，结合对材料的显微结构分析，制备出了多孔块状材料。体外溶解实验发现β－ＴＣＰ陶瓷的溶解性能。依据材料的结构和成分发生变化，从而为临床应用和材料制备提供了依据。     

Transient Stability Analysis of Power System Based on an Improved Neural Network

ＴｒａｎｓｉｅｎｔＳｔａｂｉｌｉｔｙＡｎａｌｙｓｉｓｏｆＰｏｗｅｒＳｙｓｔｅｍＢａｓｅｄｏｎａｎＩｍｐｒｏｖｅｄＮｅｕｒａｌＮｅｔｗｏｒｋＴＡＮＧＷｅｉ；ＣＨＥＮＸｕｅｙｕｎ；ＬＩＵＸｉａｏｍｉｎｇ（唐巍）（陈学允）（刘晓明）（Ｄｅｐｔ．ｏｆＥｌｅｃ...     

重质CaCO3和CPE填充增韧改性RPVC管材的研究

介绍了以ＳＧ－５型聚氯乙烯（ＰＶＣ）树脂为基材，重质ＣａＣＯ３和氯化聚乙烯（ＣＰＥ）进行填充增韧性性的研究。结果表明重质ＣａＣＯ３和ＣＰＥ的质量份数分别为２０．８时，填充增韧性ＰＶＣ树脂所得硬聚氯乙烯（ＲＰＶＣ）复合的无缺口冲击强度达到１１０．９ｋＪ．ｍ＾－２，比纯ＲＰＶＣ提高了３．５倍多，拉伸强度与纯ＲＰＶＣ相比变化不大，综合性能较好，挤出的ＲＰＶＣ管材的性能达到或超过了ＱＪ／ＣＨ０２．０３－９     

沈北煤田煤中伴生元素分布特征

对采自辽宁沈北煤田的７个刻槽煤样,应用电感耦合等离子体原子发射光谱（ＩＣＰ－ＡＥＳ）与仪器中子活化分析（ＩＮＡＡ）测定煤中８个氧化物与２０个微量元素的含量．与中国煤、美国煤、世界煤中元素质量分数对比表明：沈北煤田煤中大部分元素质量分数处于正常水平,而Ｎａ,Ｃｏ,Ｃｒ,Ｃｕ,Ｎｉ与Ｓｃ的质量分数偏高,且Ａｓ,Ｃｏ,Ｃｕ与Ｎｉ在煤中明显富集,分析认为煤中Ｃｒ和Ｎｉ质量分数较高且富集的主要原因与煤系基底橄榄玄武岩有关．相关与聚类分析以及扫描电镜能谱（ＳＥＭ－ＥＤＸ）分析显示：Ｃｏ,Ｍｏ和Ｓｎ与粘土矿物有关;Ｂｅ,Ｂｒ,Ｐ,Ｍｎ与Ｖ显示出有机亲和性;Ａｓ,Ｐｂ,Ｔｈ,Ｕ和Ｚｎ与硫化物矿物有关;Ｃｒ,Ｃｕ与Ｎｉ可能与硫化物矿物有关;Ｂａ,Ｃａ,Ｓｂ和Ｓｅ与碳酸盐矿物有关．此外,还预测了Ａｓ,Ｂｅ,Ｃｒ,Ｃｕ,Ｎｉ与Ｚｎ等有害元素在用物理洗选方法进行脱除的效率     

具有邻域并型的X—可迹图

设Ｇ是连通图，ＸＶ（Ｇ），若Ｇ存在路Ｐ使得ＸＶ（Ｐ），则称Ｇ是Ｘ－可迹图；记ＮＣ２（Ｘ）＝ｍｉｎ｛｜Ｎ（ｕ）∪Ｎ（ｖ）｜：ｕ，ｖ∈Ｘ且ｕｖＥ（Ｇ）｝，我们得到如下结果：如果Ｇ是ｎ阶２－连通图，ＸＶ（Ｇ）并且ＮＣ２（Ｘ）≥ｎ－１２，则Ｇ是Ｘ－可迹图，该结果在可迹图方面推广了Ｂ．Ｊ．Ｆａｕｄｒｅ等人在文献［４］中的结论     

NH_4H_2PO_4促凝剂对α－Ca_3（PO_4）_2水化和硬化的影响

讨论了不同浓度ＮＨ４Ｈ２ＰＯ４促凝剂对α－Ｃａ３（ＰＯ４）２（α－ＴＣＰ）水化和硬化的影响，测试了相应的硬化物凝固时间和机械强度。最后利用扫描电子显微镜，Ｘ－射线衍射仪分别对α－ＴＣＰ－ＮＨ４Ｈ２ＰＯ４骨水泥硬化产物的物相和结构进行了探讨。     

Preparation of filling porous osteoconduction materials and its animal experiment study

Titanium rods were processed into implant samples with cavity and groove in which was filled with HAP/β-TCP porous osteoconduction composite materials in order to increase the mechanical stability of the implant in vivo.The phase compositions of the composite was characterized by X-ray diffraction (XRD) and scanning electron microscopy(SEM).Histological evaluation showed that the biogradable composite could enhanced the ability of new bone formation.The composite can conduct new bone tissue growing into the cavities gradually after implanted into animal,and then achieve mechanical fixation.The filling biogradable compound exhibited excellent biocompatibility,which combined with the new bone tissues tightly without inflammation and loosing.     

用于口腔修复的生物活性陶瓷涂层的软磁材料复合体

采用了一种新型闭合进路装置用于口腔修复中的磁性固位，研制了生物活性陶瓷，并制备了生物活性陶瓷涂层的软磁材料复合体。结果表明，复合体能满足口腔修复的功能要求，提供了足够的固位力，具有良好的生物相容性．可与骨产生骨性结合，长期稳定地种植在牙根内。     

Bone Formation Process of β-TCP Ceramics with Tetracycline Tracing

To study the new bone formation in the bone defect area after implantation, the tetracycline tracing method was used. The results show that new bone formed in 1 month, and the formation rate of new bone was very high (8. 164 μm/day), considerably faster than that of control groups (3.219 μm/day). The new bone grew up quickly and β_TCP particles were surrounded by double fluorescence bands which became more obvious. The new bone formation rate was maximal at 2 months, and then gradually reduced. The rate was steady at 4 months, and then reduced to resembling as the normal physiologic metabolism of bone, which indicated the implanted materials were completely replaced by bone. Calcium phosphate materials had the ability of osteoconduction.     

The transformation of calcium phosphate bioceramics<Emphasis Type="Italic">in vivo</Emphasis>

To study the transformation process of calcium phosphate bioceramic in vivo, biodegradable porous β-tricalcium phosphate ceramics (β-TCP) were used in this experiment. The materials (ø5×8mm) were implanted in the tibia of rabbits. The β-TCP ceramics with bone tissue were retrieved, and treated for histology, and then observed by using a scanning electron microscope (SEM) and an electron probe X-ray microanalyzer (EMPA) every month. The results show that β-TCP ceramics bond to bone directly, new bones are forming and maturing with materials continuous degrading, and the materials are nearly replaced by the formed bone finally. Parts of the materials were degraded, absorpted and recrystallized, the others dispersped on the cancellous bone and the Haversian lamella with an irregular arrangement incorporating in bone formation directly by remodeling structure.     

Preparation of new tissue engineering bone-CPC/PLGA composite and its application in animal bone defects

To investigate the feasibility of implanting the biocomposite of calcium phosphate cement (CPC)/polylactic acid-polyglycolic acid (PLGA) into animals for bone defects repairing, the biocomposite of CPC/PLGA was prepared and its setting time, compressive strength, elastic modulus, pH values, phase composition of the samples, degradability and biocompatibility in vitro were tested. The above-mentioned composite implanted with bone marrow stromal cells was used to repair defects of the radius in rabbits. Osteogenesis was histomorphologically observed by using an electron-microscope. The results show that compared with the CPC, the physical and chemical properties of CPC/PLGA composite have some differences in which CPC/PLGA composite has better biological properties. The CPC/PLGA composite combined with seed cells is superior to the control in terms of the amount of new bones formed after CPC/PLGA composite is implanted into the rabbits, as well as the speed of repairing bone defects. The results suggest that the constructed CPC/PLGA composite basically meets the requirements of tissue engineering scaffold materials and that the CPC/PLGA composite implanted with bone marrow stromal cells may be a new artificial bone material for repairing bone defects because it can promote the growth of bone tissues.     

Tissue response of an osteoinductive bioceramic in bone defect rabbit model

HA/TCP and HA rods (?5 mm×10 mm) were made for implantation in New Zealand white rabbit with different condition. Sixty three rabbit were divided into three groups: group 1 (n=18), group 2 (n=27) and group 3 (n=18). In group 1, 10 mm radius was defected, and one HA/TCP rod was implanted in the muscle a distant away from the bone defect area. In group 2, also, 10 mm radius was defected, one HA rod was implanted in the muscle a distant away from the bone defect area. In group 3, two HA/TCP rods were implanted in the dorsal muscle of the rabbit with bone intact. Histological observation showed that in group 1, some new bone was found only two months after implantation (n=2), and obvious immature woven bone could be observed in these bioceramics from the 3^rd month on. However, in group 3, bone began to be found 6 months after implantation (n=2). In group 2, we could not find any bone tissue up to 9 month’s observation. These results suggest that, first, the bone defect model could significantly accelerate bone formation at non-osseous sites in rabbits; second,. HA/TCP bioceramics were confirmed with osteoinductive property while HA bioceramics without osteoinductive property nearly. Thus, bone defect might be a good animal model for further researches for osteoinductive bioceramics.     

Stiffness compatibility of coralline hydroxyapatite bone substitute under dynamic loading

When hydroxyapatite bone substitutes are implanted in human bodies, bone tissues will grow into their porous structure, which will reinforce their strength and stiffness. The concept of mechanical compatibility of bone substitutes implies that their mechanical properties are similar to the bone tissues around, as if they were part of the bone. The mechanical compatibility of bone substitutes includes both static and dynamic behavior, due to the mechanical properties of bone depending on the strain rate. In this study, split Hopkinson pressure bar technique (SHPB) was employed to determine the dynamic mechanical properties of coralline hydroxyapatite, bones with and bones without organic components, and their dynamic stress-strain curves of the three materials were obtained. The mechanical effects of collagens in bone were assessed, by comparing the difference between the Young’s moduli of the three materials. As the implanted bone substitute becomes a part of bone, it can be regarded as an inclusion composite. The effective modulus of the composite was also evaluated in order to estimate its mechanical compatibility on stiffness. The evaluated result shows that the suitable porosity of HA is 0.8, which is in favor of both static and dynamic stiffness compatibility. Supported by the Tianjin Natural Science Foundation (Grant No. 05YFJMJC10500)     

新旧混凝土界面结合状态研究

研究了在不同的界面干湿状态下，几种常见的修补材料和界面剂对新旧混凝土界面结合强度的影响。运用拉拔强度评价新旧混凝土界面结合状态，并借助显微硬度仪测量界面处的显微硬度值对试验结果进行了验证和分析。结果表明，在界面处于不同的干湿状态时，提高新混凝土的强度可使结合强度略有增大。在修补材料中掺入纤维会明显提高界面结合强度，且聚丙烯纤维要优于碳纤维．使用界面剂后界面干湿程度对界面结合强度影响减小。     

Characteristics of Self-Healing Microcapsules for Cementitious Composites

Urea formaldehyde/epoxy resin microcapsules were prepared by an in situ polymerization method and the effect of emulsifier on the syntheses process of the microcapsules was discussed. The surface morphology of the microcapsules was observed by optical microscopy and scanning electron microscopy(SEM). Chemical structure was characterized by Fourier transform infrared spectroscopy(FTIR). Thermal stability was obtained using simultaneous thermal analysis(STA). The microcapsules were composed of urea-formaldehyde resin shell and epoxy resin core. Emulsifier played an important role in the polymerization process when the core material was packed by pre-polymer, so the effects of different emulsifiers(OP-10, SDS and SDBS) were discussed respectively. Results showed that the particle size of the microcapsules was uniform when SDBS as an emulsifier. Microcapsules showed good thermal stability below 240 ℃ and the initial decomposition temperature of the microcapsules was 265 ℃. The core materials released after microcapsules rupturing, which could be proven by the images of SEM. When implanted in cementitious composites, complete shape of microcapsules and good interface between microcapsules and cement specimen substrate could also be observed.