超声消融与腹腔镜手术治疗子宫肌瘤的临床对比研究

目的:评估超声消融术与腹腔镜下子宫肌瘤切除术治疗子宫肌瘤的效果及对患者生活质量的影响。方法:子宫肌瘤患者130例分别纳入超声消融组和腹腔镜手术组,记录两组患者的治疗相关并发症,采用SF-36量表采集治疗前和治疗后1年患者生活质量评分,统计分析比较两组间各个参数的差异。结果:与腹腔镜手术组相比,超声消融组治疗相关并发症更少,住院时间更短(2.9±1.5天vs 6.2±2.7天,P<0.001)。两种治疗方式均能有效提高生活质量评分,改善子宫肌瘤患者的生活质量。结论:超声消融治疗子宫肌瘤临床并发症少,恢复快,可有效提高子宫肌瘤患者的生活质量。     

纸浆纤维的试剂法改性及其对滤纸性能的影响

采用Na OH、尿素、硫脲等调配纸浆纤维改性试剂,先对纸浆纤维进行试剂改性,再采用超声波协同处理,利用改性纤维抄造高透气性能滤纸,探讨改性试剂质量分数、超声波功率、超声波处理时间等因素对改性效果的影响,通过对比分析改性前后纸浆纤维形态变化及所抄造滤纸的透气度、平均孔径、最大孔径、松厚度、零距抗张强度等指标来评价改性效果。结果表明,当改性试剂质量分数30%、超声波功率600 W,超声波处理时间15 min时,纤维改性效果最佳;且纤维发生了明显的润胀,有一定的分丝和微纤化现象,所抄造滤纸透气度由未改性的157.57 L/(m~2·s)提高到1041.16 L/(m~2·s);平均孔径由35.171μm提高到47.498μm;最大孔径由39.178μm提高到49.712μm;松厚度由3.16 cm~3/g提高到5.22 cm~3/g。     

猪皮超声波乳化脱脂工艺的研究

以新鲜猪皮为原料,以脱脂率和胶原损失率为评价指标,研究超声波结合NP-10、AEO-9和SDBS等表面活性剂对猪皮的乳化脱脂效果,优化最适工艺参数。结果表明,猪皮超声波乳化脱脂效果明显优于单独使用超声波脱脂效果,其中以超声波SDBS乳化脱脂效果最好,最适脱脂工艺参数为0.75%SDBS、脱脂时间2h、料液比1∶2.5。该条件下鲜猪皮的脱脂率可达68.67%、胶原损失率为10.01%。     

Plant Phenolics Extraction from Flos Chrysanthemi: Response Surface Methodology Based Optimization and the Correlation Between Extracts and Free Radical Scavenging Activity

Huaiju is one of the most famous and widely used Flos Chrysanthemi (FC) for medicinal purposes in China. Although various investigations aimed at phenolics extraction from other FC have been reported, a thorough optimization of the phenolics extraction conditions from Huaiju has not been achieved. This work applied the widely used response surface methodology (RSM) to investigate the effects of 3 independent variables including ethanol concentration (%), extraction time (min), and solvent‐to‐material ratio (mL/g) on the ultrasound‐assisted extraction (UAE) of phenolics from FC. The data suggested the optimal UAE condition was an ethanol concentration of 75.3% and extraction time of 43.5 min, whereas the ratio of solvent to material has no significant effect. When the free radical scavenging ability was used as an indicator for a successful extraction, a similar optimal extraction was achieved with an ethanol concentration of 72.8%, extraction time of 44.3 min, and the ratio of solvent to material was 29.5 mL/g. Furthermore, a moderate correlation between the antioxidant activity of TP extract and the content of extracted phenolic compounds was observed. Moreover, a well consistent of the experimental values under optimal conditions with those predicted values suggests RSM successfully optimized the UAE conditions for phenolics extraction from FC.

Practical Application

The work of the research investigated the plant phenolics in Flos Chrysanthemi and antioxidant capacities. These results of this study can support the development of antioxidant additive and relative food.     

绿茶茶多酚的双频超声浸取研究

利用DPS系统建立均匀设计试验方案,对单频超声、双频组合超声和双频复合超声浸取绿茶茶多酚的浓度、浸取率、浸取速度进行了比较研究,利用偏最小二乘法处理试验数据,并建立浸取数学模型和确定最佳浸取条件。研究发现双频复合超声浸取绿茶茶多酚,在茶多酚的浓度、浸取率和浸取速率三个方面都比单频超声浸取有明显优势。     

响应面优化百香果果皮黄酮提取工艺

本实验以百香果果皮为原料,采用超声提取工艺,探索乙醇浓度、料液比、提取时间、提取温度、超声功率这五个实验因素对黄酮提取率的影响。在单因素实验结果的基础上,采用响应面建立了提取百香果果皮中黄酮的二次多项数学模型,并进一步验证了该模型的有效性,同时利用响应面分析法对提取工艺进行优化。结果表明:在乙醇浓度60%、提取时间40 min、提取温度50℃,料液比(g/mL)1∶50,超声功率250 W条件下,测得黄酮得率为19.2124 mg/g,该工艺提取量稳定,方法简单、可靠。