酚醛树脂对高软化点沥青的发泡行为及生物挂膜性能的影响

以高软化点沥青为原料,采用自发泡法制备泡沫炭,将其用作生物污水处理固菌载体材料,并通过添加适量的酚醛树脂以提高泡沫炭的开孔率,进而提高其生物挂膜量。研究结果表明：当在高软化点沥青中添加酚醛树脂的质量分数为30%时,所制泡沫炭的开孔率高达100%,生物挂膜量（质量分数）达5.4%;当酚醛树脂的添加质量分数为40%时,所制泡沫炭的压缩强度达5.2 MPa,但其开孔率较低,孔结构的均一性较差。     

PHMG化学键合改性抗菌聚氨酯软质泡沫的制备及性能

通过一步法模塑发泡工艺,将聚六亚甲基胍盐酸盐（PHMG）键合到聚氨酯（PU）分子链上,制备了抗菌聚氨酯软质泡沫。通过红外光谱表征抗菌聚氨酯的化学结构,并用紫外光谱测试聚氨酯中PHMG的键合率,同时测试了聚氨酯的泡孔结构、力学性能、抗菌性能和防霉性能。结果表明,当PHMG的质量分数为0.5%时,聚氨酯中PHMG的键合率达到76.0%,对大肠杆菌和金黄色葡萄球菌的抑菌率均超过99.5%,其防霉等级为0级。     

金刚藤多糖的微波辅助提取及体外抗氧化、降血糖活性分析

目的 以金刚藤为原料,用微波辅助法提取多糖,探究其最佳提取条件及生物活性。方法 采用苯酚-硫酸法测定总糖含量,以正交试验法考察微波功率、水料比、温度、时间对金刚藤粗多糖及多糖得率的影响。分析对比微波与热水提取金刚藤多糖含量、结构特征、体外抗氧化及降血糖活性的差异。结果 微波提取的各因素对粗多糖得率影响的主次顺序为温度>时间>水料比>微波功率,对多糖得率影响的主次顺序为温度>时间>微波功率>水料比。最优提取条件均为微波功率680W,水料比20∶1(mL/g),温度100℃,时间36min。该条件下粗多糖得率为(14.63±0.05)%,多糖得率为(8.11±0.19)%,分别是热水提取法的1.48倍和1.36倍,而提取时间缩短了70%。微波提取的金刚藤多糖具有三螺旋结构,浓度为1.5mg/mL时,其对DPPH、ABTS自由基的清除率分别为87.52%、50.48%,对α-葡萄糖苷酶的抑制率为77.85%,具有明显的抗氧化、降血糖活性。结论 微波辅助提取法可用于制备具有较高得率和生物活性的金刚藤多糖。     

用于血管介入聚乙烯醇缩甲醛泡沫材料的制备

目的探索用于血管介入的聚乙烯醇缩甲醛泡沫材料的制备。方法以聚乙烯醇、甲醛、淀粉、十二烷基磺酸钠和浓硫酸为原料,采用分步合成的方法合成了聚乙烯醇缩甲醛泡沫材料,并对其反应条件进行研究。结果建立了发泡度、反应温度、甲醛用量及酸度等最佳反应条件,制备出性能最优的聚乙烯醇缩甲醛泡沫材料。结论采用最佳反应条件可刺备出性能最优的、用于血管介入的聚乙烯醇缩甲醛泡沫材料。     

微波辅助提取瑞香狼毒总黄酮工艺条件的优化

目的:优化微波辅助提取瑞香狼毒总黄酮的工艺条件。方法:采用正交实验方法,考察料液比、溶剂乙醇浓度、微波功率、提取时间对总黄酮得率的影响,确定微波辅助提取瑞香狼毒总黄酮的最佳工艺条件。结果:微波辅助提取瑞香狼毒总黄酮的最佳条件为料液比1:25、乙醇体积分数90%、微波功率900W、提取时间60s,总黄酮平均得率为33.184mg/g。结论:微波辅助法提取瑞香狼毒总黄酮简单、易行,且快速、节能,值得推广应用。     

酚醛树脂的物化性质对其发泡行为的影响

以4种酚醛树脂为原料,在不添加固化剂的前提下,通过构建酚醛树脂的物化性质与发泡工艺和泡沫炭孔结构的内在关系来完善自发泡机理。研究结果表明：当不添加固化剂时,酚醛树脂的裂解行为及其黏-温特性是影响其发泡行为的关键因素;发泡过程中,当酚醛树脂的黏度低于2×10⁴ Pa·s时,可以制得球形、孔径为300~500 μm、孔结构均一的泡沫炭;发泡压力将影响泡沫炭孔结构的均一性及泡孔密度。     

响应面法优化山楂总多酚的微波提取工艺

[目的]通过响应面分析法对山楂多酚的微波提取工艺条件进行优化。[方法]以不同体积分数的乙醇水溶液为提取剂,以微波时间、微波功率、液料比、乙醇体积分数四个因素为自变量进行单因素试验,然后以总多酚的提取得率为响应值,用响应面法优化提取工艺条件。[结果]微波法提取山楂中总多酚的最佳提取条件为:微波功率320 W,微波时间45 s,液料比30∶1(m L/g),乙醇体积分数60%。在此条件下,山楂多酚的提取得率可以达到42.31 mg/g。[结论]微波提取法可用于山楂多酚的有效提取,可为山楂多酚的工业化制备及进一步研究提供参考依据。     

野菊花中绿原酸的微波辅助萃取研究

目的 研究微波辅助萃取野菊花中绿原酸的提取工艺.方法 以产品得率和绿原酸质量分数为指标,均匀设计4.0软件设计的U10(108)均匀试验表对野菊花的微波辅助萃取工艺参数进行优化.结果 优化出的最佳工艺:微波功率340 W、辐射时间20 min、溶剂乙醇体积分数60%、乙醇用量为9倍,浸泡时间30 min.与传统加热回流野菊花产品得率和绿原酸质量分数(分别为16.8%、0.889%)比较,优化的微波辅助萃取野菊花所得相应指标分别为18.3%、1.212%.结论 微波辅助萃取野菊花中绿原酸具有萃取时间短、溶剂用量少、目标组分得率高等优点.     

PTMEG改性三聚氰胺甲醛泡沫板的制备及性能表征

将聚四氢呋喃醚二醇（PTMEG）引入到三聚氰胺甲醛（MF）树脂结构中,采用热发泡的方式得到了PTMEG/MF泡沫板。利用核磁共振氢谱（¹H-NMR）、傅里叶红外光谱（FT-IR）、扫描电子显微镜、万能材料试验仪、热重分析仪对PTMEG/MF泡沫板的化学结构、微观形貌、力学性能、热分解温度进行了测试和分析。结果表明：当PTMEG加入量为MF质量的15%时,PTMEG/MF泡沫板的拉伸强度达到了6.72 MPa,热分解温度为346℃,整体孔洞规整且为开孔,综合性能良好。     

表面活性剂协同微波辅助提取芹菜叶总黄酮的研究

目的:考察表面活性剂协同微波提取芹菜叶黄酮的工艺。方法:通过单因素试验和正交试验,确定最佳提取条件。结果:最佳提取工艺条件:以质量分数为1.0%的十二烷基硫酸铵为提取剂,料液比为1:50,微波功率为中高火,提取时间为1 min。结论:本方法大大提高了芹菜叶黄酮的提取率。     

APPLICATION OF LORNOXICAM TO PATIENT-CONTROLLED ANALGESIA IN PATIENTS UNDERGOING ABDOMINAL SURGERIES

FOR anesthesiologis s ,treatingpostoperativepainhas alwaysbeen a problem.Althoughopioidshave been provedtobe effective,theirsideeffectscouldnotbeignored.With thedevelopmentofscienceand pharmacology,many drugs with aspectsof satisfactoryanalgesicefficacyand couldbe welltoleratedby patientshave been developed.And lornoxicamisone of them, which isa non-steroidalanti-inflammatorydrug (NSAID ), with analgesic, anti-infl-ammatory,andantipyreticproperties.Itseliminationhalf-time(3 to 5 hours) isle…     

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.     

Dr.Zhang Ren''''s Experience in the Acupuncture Treatment of Different Diseases with the Same Therapeutic Principle

Dr.Zhang Ren,the chief physician,is the chairman of Shanghai Acupuncture and Moxibustion Association.Having been engaged in medicine for about 40 years,he is experienced in treating various intractable diseases.In his long years of clinical practice,he advocates taking the TCM differentiation as the basis to seek for the acupuncture method for treatment of modern intractable diseases.The author of this essay had the fortune to follow Dr.Zhang in study.The following is a summary of Dr.Zhang's experience in the acupuncture treatment for different intractable diseases with the same therapeutic principle.     

Luo Lingjie''''s Experience in Treating Chronic Nephropathy

In treating chronic nephropathy,Luo Lingjie,a chief physician,pays attention to regulating the balance between yin and yang,treating infection if present,and removing pathogenic factors.He prescribes gentle drugs and uses carefully strongly warming-tonifying ones,emphasizes the importance of persuading the patient to persist in treatment with medication and nurse one's health for recuperation,and is good at combined use of TCM and western medicine therapy and brings the merits of various therapies into full play,with obvious theraoeutic effects.     

Acupuncture Combined with Spinal Tui Na for Treatment of Primary Dysmenorrhea in 30 Cases

Objective: To observe the therapeutic effects in acupunture treatment of primary dysmenorrhea combined with spinal Tui Na, and study its mechanism. Methods: Thirty cases of the treatment group were treated by acupuncture combined with spinal Tui Na, and thirty cases in the control group were treated by routine acupuncture. Results: The total effective rate was 93.3% in the treatment group, and 73.3% in the control group, with a significant difference between the two groups (P<0.05). Conclusions: Acupuncture combined with spinal Tui Na has good prospects for treatment of primary dysmenorrhea.