Nb2O5掺杂对SrTiO3陶瓷显微结构和微波介电损耗的影响

采用无压烧结工艺制备了Nb₂O₅掺杂SrTiO₃陶瓷,研究了Nb₂O₅掺杂量对SrTiO₃陶瓷相组成、显微结构和微波介电损耗的影响。结果表明：Nb₂O₅掺杂对SrTiO₃陶瓷的相结构没有产生明显的影响,但会在一定程度上阻碍样品的致密化,同时促进晶粒的生长。随着Nb₂O₅掺杂量的增加,SrTiO₃陶瓷的介电常数从296逐渐下降至230左右,温度系数从1.714×10^-3℃^-1逐渐下降至1.629×10^-3℃^-1,Q×f值则先急剧升高,之后又慢慢下降。当Nb₂O₅掺杂量为0.15%（质量分数,下同）时,SrTiO₃陶瓷样品的介电损耗最低,Q×f可达6 281 GHz,大约是纯SrTiO₃（1 145 GHz）陶瓷样品的5.5倍（此时介电常数约为270,温度系数约为1.684×10^-3℃^-1）。此外,对材料显微结构、介电常数、温度系数特别是介电损耗变化的原因进行了分析。     

预聚物分子量对立体复合聚乳酸固相缩聚产物结构和性质的影响

采用乳酸作为引发剂、辛酸亚锡作为催化剂,引发丙交酯开环聚合制得分子量不同的具备缩聚活性的预聚物L-聚乳酸（PLLA）和D-聚乳酸（PDLA）,将重均分子量（M_w）相近的预聚物熔融共混后制成前体进行固相缩聚。采用核磁共振（NMR）、凝胶渗透色谱（GPC）、差示扫描量热（DSC）及X射线衍射（XRD）分析了固相缩聚产物的链结构、分子量、热性能及晶体结构。结果表明,固相缩聚产物具有立体嵌段结构。预聚物的分子量大小将影响固相缩聚前体中均相晶体和立体复合晶体的相对含量,进而影响固相缩聚产物的结构。当预聚物PLLA和PDLA的M_w≈5×10⁴时,固相缩聚产物重均分子量的涨幅最大,最终达到1.83×10⁵。因此,采用M_w≈5×10⁴的预聚物进行固相缩聚有利于产物中立体复合晶体结晶度的提高。     

环氧树脂/聚醚砜/纳米氧化铝复合材料的力学性能及介电性能

以甲基纳迪克酸酐（MNA）为固化剂,制备了环氧树脂/聚醚砜/纳米氧化铝三元复合材料,并对其力学性能、介电性能以及热稳定性能进行了研究,同时探讨了其性能增强机理。结果表明：当聚醚砜（PES）和纳米氧化铝（nano-Al₂O₃）的质量分数分别为15%和3%时,环氧树脂/15PES/3Al₂O₃复合材料的冲击强度、拉伸强度和弯曲强度分别达到45.7 kJ/m²、87 MPa和180 MPa,与纯环氧树脂相比,均有大幅度的提高。在测试频率为100 Hz时,复合材料的介电常数和介电损耗分别为7.7和0.013 5,介电性能较纯环氧树脂也有一定提高。此外,热分解温度比纯环氧树脂的提高了73℃,热稳定性得到提高。     

柠檬酸改性壳聚糖水凝胶的制备与性能

采用多元有机酸柠檬酸（CA）对壳聚糖（CS）进行改性,并通过冷冻-凝胶处理形成CS-CA水凝胶来提高CS的湿态力学性能。采用红外吸收光谱分析CA改性CS的作用机理,通过扫描电镜（SEM）、孔隙率、吸水动力学及拉/压力学性能测试优化CA的添加量（m（CA）∶m（CS-CA））和CS与CA在乙醇水溶液中的质量分数（w（CS-CA））。结果表明：CA主要是通过其结构中含有的羧酸位点与质子化CS的NH₃⁺形成稳定的离子键进行物理交联;冷冻-凝胶处理可得到孔隙互相连通的多孔结构CS-CA水凝胶;当m（CA）∶m（CS-CA）=0.3、w（CS-CA）=3%时可获得性能最优的CS-CA水凝胶。     

非离子型聚合物改性碳纳米管及其复合材料

以聚乙二醇二缩水甘油醚（PEE）与二胺单体4,4''-二氨基-3,3''-二叔丁基-二苯甲烷（MBTBA）为原料,在乙醇溶液中发生亲核加成/开环反应制备一种聚乙二醇类的非离子型聚合物（PM）。采用FT-IR、SEM、UV-vis手段分析表明,PM与碳纳米管（CNT）表面相互作用形成C—O—N键、C—O—C键包裹在CNT表面;在二甲基乙酰胺（DMAc）、N-N-二甲基二甲酰胺（DMF）、甲基吡咯烷酮（NMP）、四氢呋喃（THF）及水等溶剂中,CNT-PM呈现高度分散状态达数月。采用共混方法制备CNT-PM与环氧树脂EP-51复合材料,当CNT-PM的添加质量分数为0.7%时,复合材料的冲击性能由纯树脂的（21.7±1.1） kJ/m²提高到（73.5±2.1） kJ/m²,玻璃化转变温度（T_g）从163.8℃提高到180.3℃。     

丙烯酸酯橡胶/硫酸铜配位交联复合材料的制备与性能表征

采用溶液球磨法直接制备丙烯酸酯橡胶（AR）/硫酸铜复合材料,在180℃热压下实现AR与CuSO₄的配位作用。球磨后CuSO₄粒径大幅减小且分布变窄,粒径平均峰值从9.88 μm减小到1.03 μm。采用电子顺磁共振波谱（ESR）、X射线光电子能谱（XPS）、紫外-可见吸收光谱（UV-vis）、动态力学分析（DMA）、扫描电子显微镜（SEM）等手段对复合材料进行表征。结果表明,溶液球磨法制备的w（CuSO₄）=2.9%的复合材料较传统方法制备的w（CuSO₄）=4.8%复合材料,CuSO₄的添加量减少了40%,但拉伸强度提高了120%。SEM分析结果表明溶液球磨法制备的复合材料中CuSO₄的粒径和分布情况均得到显著改善;ESR、XPS谱图证明了AR与CuSO₄之间发生配位作用;DMA结果表明：由于配位作用,复合材料较AR呈现出刚性的特点。     

聚丁二烯季铵盐的合成及其对钠基蒙脱土的插层与表征

以端羟基聚丁二烯（HTPB）液体橡胶、环氧氯丙烷和w=33%的三甲胺水溶液为原料,三氟化硼乙醚络合物为催化剂,采用酸催化法合成大分子聚丁二烯液体橡胶季胺盐（HTPB-QAS）。研究了物料物质的量之比、催化剂用量、开环时间、开环温度及闭环时间对HTPB羟基转化率的影响,红外光谱（FT-IR）与核磁共振谱图（¹H-NMR）表明成功地合成了HTPB-QAS,羟基最大转化率为65.7%。采用溶液法和静置法将HTPB-QAS插层钠基蒙脱土,制得聚丁二烯液体橡胶-蒙脱土纳米复合材料（HTPB-OMMT）。X射线衍射（XRD）、小角X射线散射（SAXS）、热重分析（TGA）和透射电子显微镜（TEM）分析结果表明,HTPB-QAS成功插入钠基蒙脱土片层中,并且复合材料热稳定性得到明显提高。     

PANI-Fe3O4复合材料的制备及其电磁参数匹配特性的数值模拟

以电损耗型吸波剂为研究基础,根据传输线理论模拟获得给定条件下的理想电磁参数区域,考察厚度（d）、频率（f）、反射率（R）等因素对理想电磁参数区域的影响。将模拟结果与导电聚苯胺（PANI）的测试结果进行对比,给出吸波剂改性方向并预测不同频段下的吸波性能。结果显示,在中空结构PANI表面负载Fe₃O₄后,复合材料的介电损耗降低,磁损耗增加,介电损耗角正切（tan δ_ε）和磁损耗角正切（tan δ_μ）相接近,电磁匹配特性得到改善,上述实验结论与模拟结果相吻合。     

苯乙烯-苯乙烯磺酸钠共聚物的制备及其流变性能

采用乳液聚合合成了一种可作为聚丙烯（PP）纤维可染改性添加剂的苯乙烯-苯乙烯磺酸钠共聚物P（St-co-NaSS）。通过傅里叶转换红外光谱仪（FT-IR）和核磁共振氢谱仪（¹H-NMR）对共聚物的苯乙烯磺酸钠结构单元进行了表征,研究了反应条件对共聚物磺化度的影响;通过差示扫描量热仪（DSC）和热重分析仪（TG）研究了磺酸基团的引入对共聚物的玻璃化转变温度和起始分解温度的影响;通过旋转流变仪研究了磺化度对共聚物剪切黏度的影响;初步探讨了PP/P（St-co-NaSS）共混体系的染色性能。结果表明：当反应时间为2 h,反应温度为70℃,引发剂质量分数为0.6%,苯乙烯磺酸钠的摩尔分数为0.01时,共聚物的磺化度f=6.68%（零切黏度η₀=19 620 Pa·s,属牛顿流体）;在10^-2~10^-1 s^-1的剪切速率范围内,P（St-co-NaSS）表现出假塑性流体的特征,具有较好的加工流动性。对于PP/P（St-co-NaSS）共混体系,使用阳离子染料染色时,染色深度（K/S值）为2.603 2,使用分散染料染色时,K/S值为10.168 8。P（St-co-NaSS）适合作为聚丙烯纤维的可染改性添加剂。     

丁腈橡胶/硫酸铁配位交联复合材料的制备与表征

采用溶液球磨法制备了丁腈橡胶（NBR）/硫酸铁（Fe₂（SO₄）₃）复合材料,Fe₂（SO₄）₃颗粒的平均粒径由10.23 μm降低到1.13 μm,粒径大小分布变窄。电子顺磁共振谱（ESR）以及X射线光电子能谱分析（XPS）证明了丁腈橡胶中的-CN与Fe₂（SO₄）₃中的Fe³⁺发生了配位反应。随着Fe₂（SO₄）₃添加量的增加,复合材料的玻璃化转变温度（T_g）与交联密度逐渐增加。当Fe₂（SO₄）₃添加量为15 phr （每100份基体中的填料份数）时,NBR/Fe₂（SO₄）₃复合材料综合力学性能最好,复合材料的拉伸强度比纯NBR的拉伸强度提高了约12.8倍。采用溶液球磨法制备出的NBR/Fe₂（SO₄）₃复合材料的交联密度、拉伸强度、硬度、回弹性、伸张疲劳系数以及耐老化性能均高于干法制备的NBR/Fe₂（SO₄）₃复合材料的相应值。     

Acupuncture Treatment of Vomiting

CASE HISTORY A female patient, 46 years old, head of the foreign affairs department of a certain university in Beijing, paid her first visit on October 9, 2006, with the chief complaint of vomiting for one month. She got vomiting after meals in early September. Before that, she had discomfortable sensation in the stomach due to angry with others, but she didn't pay much attention. Later, it developed into vomiting after eating. After the vomiting, the discomfort would be relieved, but with slight hypodynamia. She was once diagnosed as having 'neurogenic vomiting'. Having taken some western and Chinese drugs, the above symptoms were a little bit improved, but she would have nausea upon eating and with regurgitation. Because of the fear for vomiting, she did not dare to have food intake, with body weight reduction of 6 kilos in one month.     

Qiu Baoguo''''s Experience in Treating Consumptive Syndromes after Radio-Chemotherapies

Radiotherapy and chemotherapy are the important modern medical therapies for malignant tumors,yet they can also bring about serious local and systemic toxic side reactions so to decrease the patient;'s life quality,manifested by a series of consumptive symptoms.Having engaged in the combined work of Chinese and western medicine for nearly 50 years,the research fellow Qiu Baoguo in Henan Provincial Academy of TCM has developed his unique views on the TCM study of consumptive syndromes.The author of this essay had once the fortune tO follow Dr.Qiu in clinic,and specially would like to introduce in the following Dr.Qiu's experience in treating consumptive syndromes after radio-chemotherapies for patients with malignant tumor.     

Insomnia Due to Deficiency of Both the Heart and Spleen Treated by Acupuncture-Moxibustion and Chinese Tuina

OBJECTIVE: To observe therapeutic effects of the comprehensive therapy of acupuncture-moxibustion and Chinese Tuina for treatment of insomnia due to deficiency of both the heart and spleen. METHODS: 92 cases were divided randomly into the treatment group (treated by acupuncture-moxibustion and Chinese Tuina) and the control group (treated by acupuncture-moxibustion). RESULTS: The therapeutic effect of the treatment group was obviously superior to that of the control group (the CHI2 test showed P < 0.01). CONCLUSIONS: The comprehensive therapy of acupuncture-moxibustion and Chinese Tuina can give marked therapeutic effects for treatment of insomnia due to deficiency of both the heart and spleen.     

Analysis of CK-19,PDX-1,Nestin,Ngn3 in different donor islet purity in rats

Objective: To investigate if there are the CK-19, PDX-1, Nestin, Ngn3 positive cells in the donor islets of different purity in rats. Methods: Thirty male adult SD rats were randomly divided into 3 groups. Islets were isolated using digestion by ductal injection of collagenase. Group Ⅰ (n=10): Separating cell preparations were not purified, Group Ⅱ(n=10): Islet sediment was purified with 25% Ficoll400 ,Group Ⅲ (n=10): Islet sediment was purified with 25% and 11% Ficoll-400. The levels of protein of CK-19, PDX-1, Nestin and Ngn3 were detected by immunohistochemistry and the mRNA of CK-19, PDX-1, Nestin, Ngn3 was amplified by RT-PCR. Results: After two different purification methods applied, three islet preparations of different purities were obtained. The difference of islet purity was significant among various groups (P＜0.05). Compared with group Ⅱ and group Ⅲ,the protein and mRNA of CK-19, PDX-1, Nestin,Ngn3 were both higher in group Ⅰ; group Ⅲ was poorly expressed. Conclusions: The three different islet purity donor islet have different CK-19, PDX-1, Nestin, Ngn3 positive cells within them, indicating that there are some islet stem cells in the purified donor islet.     

A preliminary screening study on the associated proteins in human psoriasis vulgaris by serum proteomics technologies

Objective：To investigate the optimum screening conditions of associated proteins in human psoriasis vulgaris by serum proteomics technique, and to screen the different expression proteins related with psoriasis vulgaris. Methods：Serum samples of peripheral blood were collected from newly diagnosed psoriasis vulgaris patients in the clinic, and 20 matched healthy persons. Serum albumin IgG was removed by filtering with ProteoExtract Albumin/IgG. After comparative proteomics analysis the different protein spots were identified using 2-DE and MS. Results ：Electrophoresis figures with high resolution and reproducibility were obtained. Three different expression proteins were found only in the serum from psoriasis vulgaris patients, while nine other different proteins expressing from healthy volunteers. Conclusion：The protein expression was different in the serum between the psoriasis vulgaris patients and healthy volunteers. It was hoped that we could find the biomarkers related to psoriasis vulgaris by using proteomics.     

A CASE OF HUGE GASTRIC DISOPYROBEZOAR

PYTOBEZOARS are common bezoars in gastrontestinal tract, commonly seen in stomach and mall intestine,1but huge disopyrobezoars are     

Acupuncture Treatment of Chest Bi Syndrome

CASE HISTORY A male,a retired officer of 61 years old,paid his first visit on May 12,2006.The patient stated that 2 weeks before he suddenly got paroxysmal precordial choking pain,with irregular attacks.Each attack would last several seconds to several minutes.The attack was accompanied with heavy oppressed sensation in the precordial region,palpitation,lassitude,and in severe cases,sweating,which was once diagnosed by a hospital as'coronary heart disease'.Recalling the case history,the patient said that several days before he got angry with others because of some affairs in work,and he was not so used to the life pattern since he had just retired from his busy working post.At usual times,he was quick tempered and peevish.In recent days,he had poor appetite,and loose stool.     

Instructions to Contributors

The English edition of Chinese Journal of Integrative Medicine is edited and published by the Chinese Journal of Integrated Traditional and Western Medicine Press.Original scientific papers of advanced clinical and experimental medicine in the field of complementary/alternative medicine or integrative medicine are expected.