玉屏风散防治肝病的研究进展

玉屏风散组方为黄芪、白术和防风,具有扶正固表的作用,临床应用广泛,极具开发应用价值。通过查阅近年来有关玉屏风散防治肝病的相关文献,对玉屏风散各组分的肝病防治相关机制、全方防治肝病的临床应用与药理研究进行概括与总结,证实其在肝病的防治中具有调节免疫、抗氧化、抗纤维化;抗肿瘤的作用。     

拔毒生肌散治疗糖尿病足病溃疡的临床疗效观察

目的:观察拔毒生肌散在临床中对于糖尿病性足病溃疡的治疗效果。方法:选取2017年4—9月洛阳市第一中医院周围血管病防治中心一病区收治的糖尿病性足病溃疡患者40例,随机分为对照组和观察组。每组20例,2组均在控制血糖、控制感染、改善循环、营养神经、活血化瘀等内治基础上,外治统一使用碘伏、3%过氧化氢(双氧水)消毒液、0.9%氯化钠注射液冲洗创面常规消毒。对照组常规外科消毒后给予敷料包扎固定。观察组常规外科消毒后拔毒生肌散外用。结果:观察组临床总有效率为90%,较对照组的总有效率65%,显著提高,差异有统计学意义(P0.05)。治疗前2组总积分比较,差异无统计学意义(P0.05)。治疗后2组总积分比较均有所降低,差异有统计学意义(P0.05),观察组优于对照组。结论:拔毒生肌散在糖尿病性足病溃疡的治疗中有明显优势,可减轻患者痛苦,缩短治疗周期。具有作用快速,疗效显著,不良反应少,运用方便,便于直接观察,随时掌握等优点。在治疗糖尿病足病溃疡有着独特的优势。     

选择性脱除丹参提取液中重金属的吸附剂制备研究

目的以分子筛为主要原料,开发出能选择性脱除丹参提取液中5种重金属的吸附剂。方法从4种原料铁红粉末、快脱粉(活性氧化铝)、13X分子筛原粉、硫化锌粉末中筛选出13X分子筛原粉、活性氧化铝为原料,使用混料均匀试验方法,筛选吸附剂配方。再选用壳聚糖、乙二胺四乙酸(EDTA)为扩孔剂,制备了扩孔型吸附剂。结果经混料均匀试验,可得吸附剂中13X分子筛原料比例处于0.275 6~0.465 5时,对水中5种重金属Cu、Pb、Cd、Hg、As均有较好脱除效果。将混料设计优选的吸附剂用于脱除丹参提取液中5种重金属,吸附时间4 h,Cu、Pb、Cd、Hg、As脱除率分别为14.4%、74.5%、54.6%、13.4%、8.8%。而相同组成的扩孔型吸附剂对丹参提取液中5种重金属脱除率有明显提升,Cu、Pb、Cd、Hg、As的脱除率分别提高至21.0%、91.5%、97.5%、60.3%、46.8%。结论所制备的扩孔型吸附剂,能在较短时间内脱除丹参提取液中5种重金属,具有一定工业应用前景。     

马钱子碱固体脂质纳米粒凝胶骨架缓释片的研制

目的制备马钱子碱固体脂质纳米粒(SLN)及其冻干粉,进一步制备成马钱子碱固体脂质纳米粒凝胶骨架缓释片(SLN-HMST),并探讨体外释药影响因素及释药机制。方法在单因素考察的基础上设计正交试验优化马钱子碱SLN-HMST处方。分别采用零级模型、一级模型和Higuchi模型对马钱子碱SLN-HMST体外释药模型进行拟合,采用Ritger-Pappas模型探讨缓释片释药机制。结果优化后的马钱子碱SLN-HMST体外释放行为符合一级释药模型,释药方程为ln(1-Mt/M∞)=-0.212 1 t+0.106 4(r=0.992 3),12 h内累积释放度为91.48%,具有明显的缓释特征,释药机制为扩散和溶蚀共存。结论制备的马钱子碱SLN-HMST,工艺重复性较好,在12 h内具有良好的体外缓释作用。     

Effects of Different Substrates on the Formability and Densification Behaviors of Cemented Carbide Processed by Laser Powder Bed Fusion

Cemented carbide materials are widely applied in cutting tools, drill tools, and mold fabrication due to their superior hardness and wear resistance. Producing cemented carbide parts via the laser powder bed fusion (L-PBF) method has the advantage of fabricating complex structures with a rapid manufacturing speed; however, they were underdeveloped due to their low density and crack formation on the blocks. This work studied the effect of different substrates including 316L substrates, Ni200 substrates, and YG15 substrates on the forming quality of WC-17Co parts fabricated by L-PBF, with the aim of finding the optimal substrate for fabrication. The results revealed that the Ni200 substrates had a better wettability for the single tracks formation than other substrates, and bonding between the built block and the Ni200 substrate was firm without separation during processing with a large range of laser energy inputs. This guaranteed the fabrication of a relatively dense block with fewer cracks. Although the high laser energy input that led to fine crack formation on the blocks formed on the Ni200 substrate, it was found to be better suited to restricting cracks than other substrates.     

50%杀螺胺乙醇胺盐悬浮剂灭螺效果评价

目的评价50%杀螺胺乙醇胺盐悬浮剂的实验室和现场杀螺效果。方法在实验室和现场采用50%杀螺胺乙醇胺盐悬浮剂浸杀、喷洒法灭螺,并与50%氯硝柳胺乙醇胺盐可湿性粉剂进行效果比较。结果室内浸杀,50%杀螺胺乙醇胺盐悬浮剂24、48 h和72 h LC_(50)值分别为0.092 6、0.062 9 mg/L和0.054 9 mg/L;室内0.25 mg/L浸杀24、48 h和72h,钉螺死亡率均为100%;室内喷洒,0.25 g/m~2 3 d后钉螺死亡率即可达100%。江陵现场,除0.5 g/m~3浸杀24 h钉螺死亡率为96.67%外,其余浓度组钉螺死亡率均为100%。公安现场,0.5 g/m~3及以上浓度组浸杀钉螺2 d后,钉螺死亡率可达100%;江陵现场,0.5 g/m~2喷洒1、3 d和7 d后钉螺死亡率分别为87.5%、92.82%和97.40%。公安现场,0.5 g/m~2喷洒1、3 d和7 d后钉螺死亡率分别为85.94%、86.78%和94.21%,且1.0 g/m~2组钉螺死亡率均高于实验对照组WPN。结论 50%杀螺胺乙醇胺盐悬浮剂具有较好的实验室和现场杀螺效果,为新型高效、使用方便的灭螺药物剂型。     

Effects of TiO2 Nanoparticle Addition on Microstructure and Selected Properties of Ag–xTiO2 Composites

The paper presents the results of a study of the microstructure and selected properties of silver-based composites reinforced with TiO₂ nanoparticles, produced by the powder metallurgy method. Pure silver powders were mixed with TiO₂ reinforcement (5 and 10 wt%) and 5 mm steel balls (100Cr6) for 270 min in a Turbula T2F mixer to produce a homogeneous mixture. The composites were made in a rigid die with a single-action compaction press under a pressure of 400 MPa and 500 MPa and then sintered under nitrogen atmosphere at 900 °C. Additionally, to improve the density and mechanical properties of the obtained sinters, double pressing and double sintering operations were conducted. As a result, compacts with a density of 90–94% were obtained. The microstructure of the sintered compacts consists of uniform grains, and the TiO₂ reinforcement phase particles are located on the grain boundaries. There were no discontinuities at the Ag–TiO₂ contact boundary, which was confirmed by SEM and TEM analysis. The use of a higher pressure had a positive effect on the hardness and flexural strength of the tested materials. It was found that the composites with 5 wt% TiO₂ pressed under 500 MPa are characterized by the highest level of mechanical properties. The hardness of these composites is 57 HB, while the flexural strength is 163 MPa.     

Bio-oss骨粉对人胎盘来源间充质干细胞体外成骨活性影响的研究

目的: 研究人胎盘源间充质干细胞(HPMSCs)与Bio-oss骨粉结合后的增殖分化情况,探讨以人胎盘源干细胞(HPMSCs)作为种子细胞,Bio-oss骨粉作为支架材料联合构建组织工程化生物衍生骨的可能性。方法: 无菌条件下分离培养人胎盘源间充质干细胞(HPMSCs)并检测其分化能力。将细胞分为单独培养组与复合Bio-oss骨粉培养组。观察细胞与支架材料结合情况并在细胞形态特点、增殖分化能力方面将两组细胞进行比较。结果: 人胎盘源间充质干细胞与Bio-oss骨粉复合培养后,细胞形态、增殖分化能力与对照组人胎盘源间充质干细胞无明显差异。结论: 以人胎盘源干细胞(HPMSCs)为种子细胞、Bio-oss骨粉为支架复合培养构建组织工程化衍生骨是可行的。     

宫保散联合LEEP治疗宫颈癌前病变合并HPV感染的临床效果分析

目的:探讨分析宫保散联合高频电波刀(LEEP)对宫颈癌前病变合并人乳头瘤病毒(HPV)感染的临床效果。方法:将我院2013年2月至2015年6月收治的宫颈癌前病变合并HPV感染患者74例按照病床单双号分为试验组和对照组,每组各37例。对照组患者在常规治疗基础上给予LEEP治疗,试验组在对照组基础上给予宫保散局部涂抹治疗,比较两组疗效,分析宫保散联合LEEP治疗宫颈癌前病变合并HPV感染价值。结果:两组手术时间、术中出血量无显著差异(P0.05),而试验组住院时间和医疗费用均较对照组显著降低(P0.05);两组治疗前HPV病毒载量无显著差异(P0.05),治疗后均显著降低(P0.05),且试验组远低于对照组(P0.05);试验组HPV转阴率和总有效率(86.49%和91.89%)均明显高于对照组(51.35%和64.86%)(P0.05);两组不良反应发生率差异无统计学意义(P0.05)。结论:宫保散联合LEEP治疗宫颈癌前病变合并HPV感染效果确切,可以显著减少HPV病毒载量,提高HPV转阴率和总有效率,且安全可靠。     

国产与进口复方聚乙二醇在结肠镜检查前肠道准备中的效果比较

[目的]评价国产与进口复方聚乙二醇在结肠镜检查前肠道清洁准备中的效果。[方法]选取门诊以及住院需作结肠镜的患者90例并随机分为A组和B组。A组、B组分别以国产聚乙二醇电解质散、进口聚乙二醇电解质散作肠道清洁准备,以波斯顿评分法对2组行肠道准备评分。[结果]A组、B组总评分分别为(5.38±1.83)分、(6.33±2.08)分,B组优于A组,差异有统计学意义(P0.05)。[结论]进口聚乙二醇电解质散进行肠道准备更能有效清洁肠道,提高肠镜检查的质量。