加味归芍异功散联合西药四联疗法治疗幽门螺杆菌相关性慢性胃炎30例          下载免费PDF全文

张件云  贺莉娟  尹萍 《应用海洋学学报》2022,38(12):13

目的：观察加味归芍异功散合西药四联疗法治疗脾胃虚弱型幽门螺杆菌（Hp）相关性慢性胃炎的临床疗效。方法：将60 例Hp相关性慢性胃炎脾胃虚弱证患者按照随机数字表法分为治疗组和对照组,每组各30 例。治疗组采用加味归芍异功散合西药四联疗法治疗,对照组仅采用西药四联疗法治疗,比较2组的中医证候疗效、Hp根除情况、中医证候评分（胃脘隐痛、胃脘胀满、乏力、纳呆、气短、大便稀溏）以及不良反应发生情况。结果：中医证候疗效总有效率治疗组为100.00%（30/30）,对照组为93.34%（28/30）,2组比较,差异有统计学意义（P<0.01）;Hp根除总有效率治疗组为100.00%（30/30）,对照组为80.00%（24/30）,2组比较,差异有统计学意义（P<0.05）;2组治疗后中医证候各项评分均较治疗前下降,且治疗组下降幅度较对照组更大（P<0.05）;不良反应发生率治疗组为6.67%（2/30）,对照组为20.00%（6/30）,组间比较,差异无统计学意义（P>0.05）。结论：加味归芍异功散合西药四联疗法治疗Hp相关性慢性胃炎脾胃虚弱证的临床疗效优于单用四联疗法,值得临床推广应用。  相似文献   

Magnetic cleansing of weathered/tarry oiled feathers--the role of pre-conditioners     

Dao HV  Ngeh LN  Bigger SW  Orbell JD  Healy M  Jessop R  Dann P 《Marine pollution bulletin》2006,52(12):1591-1594

Iron powder has previously been demonstrated to be effective in the removal, via magnetic harvesting, of a wide variety of oil contaminants from feathers and plumage. This study investigates the efficacy of magnetic cleansing for the removal from feathers of tarry contamination that has been allowed to weather. Clusters of feathers from Mallard duck (Anas platyrhnchos) and Little Penguin (Eudyptula minor) were completely immersed in a tarry contaminant and allowed to weather from one to fourteen days. The contaminant was removed using a magnetic cleansing protocol and the removal efficacy assessed gravimetrically. For one, seven and fourteen days of weathering, a final removal (after fourteen treatments) of more than 99% and 97% was achieved for duck feathers and penguin feathers, respectively. Repeating the experiments (for a seven-day weathering period) for both duck and penguin feathers, with the judicious application of a pre-conditioner (olive oil), further improved removal efficacy. A convenient method to screen for improved pre-conditioning agents is suggested.  相似文献   

粉晶X射线衍射法在岩石学和矿物学研究中的应用   总被引：14，自引：7，他引：7  

庞小丽  刘晓晨  薛雍  江向锋  江超华 《岩矿测试》2009,28(5):452-456

X射线衍射是测定物质结构的主要分析手段,广泛应用于物理学、化学、医药学、金属学、材料学、工程技术学、地质学和矿物学。文章综述了粉晶X射线衍射法在造岩矿物、黏土矿物、岩组学、类质同象和结晶度的测定等领域发挥的重要作用。随着测量技术的发展,粉晶X射线衍射在矿物结晶过程中的研究、矿物表面研究、矿物定量相分析和矿物晶体结构测定方面均有新的应用。  相似文献   

X荧光光谱分析技术在测定安徽月山矿床铁铜矿石中Fe、Cu的应用研究     

刘春  郑洪涛  梁述廷  刘玉纯  安乐生 《矿物岩石地球化学通报》2019,(1):169-175

为建立符合安徽月山矿区的X荧光光谱(XRF)分析方法,针对矿区铁矿、铜矿的特点,用铁、铜矿石的国家标准物质制作系列校准样片,通过粉末压片和玻璃熔融两种制样方法,波长色散X荧光光谱法测定主矿体样品中的Fe、Cu等主量元素,并将测定结果与传统化学方法分析结果进行比较。结果显示,熔片法-XRF的测定结果与化学容量法测定结果一致,试样在850℃灼烧,按40∶1大稀释比熔融制样,解决了样品在高温熔融过程中对铂黄坩埚的腐蚀,适用于月山矿区铁铜矿样品中Fe、Cu的测定。粉末压片法不能克服矿物效应和粒度效应的影响,测定结果与化学容量法结果比对偏差较大,不适用于月山地区铁铜矿中Fe、Cu的测定。  相似文献   

改性矿物微粉增强硅橡胶性能的研究     

魏从容  吴季怀  胡东红 《矿物岩石地球化学通报》1999,(3)

硅橡胶作为特种橡胶体系的一个重要成员,以其耐高温、耐寒、耐候及电气特性等优良品质得到国防、航天航空、电子、医疗卫生等行业的青睐［１］。然而,目前工业上主要采用价格昂贵的气相白炭黑作硅橡胶的增强剂,使硅橡胶制品成本偏高,限制了硅橡胶的普及应用,阻碍了硅...  相似文献   

Structural and magnetic properties of Co2Al4Si5O18 and Mn2Al4Si5O18 cordierite     

K. Knorr  M. Meschke  B. Winkler 《Physics and Chemistry of Minerals》1999,26(6):521-529

The crystal structures, lattice dynamics and magnetic properties of synthetic Co-cordierite, Co₂Al₄Si₅O₁₈, and Mn-cordierite, Mn₂Al₄Si₅O₁₈ have been studied by neutron powder diffraction, infrared spectroscopy and magnetisation measurements. Due to different synthesis conditions, the Co-cordierite used here crystallised in the hexagonal α-cordierite structure with a disordered Si/Al distribution in the framework, while for the Mn-cordierite the orthorhombic β-structure has been determined. The experimentally determined paramagnetic moments, _exp (Mn) = 5.47(6) _B and _exp (Co) = 3.88(4) _B , are in good agreement with theoretical predictions for octahedrally coordinated Mn²⁺ and Co²⁺, respectively. In both compounds there is no magnetic long-range order down to at least 1.5 K. However, the onset of an anti-ferromagnetic short-range correlation of magnetic moments along [001] has been observed for Mn-cordierite by magnetisation and neutron diffraction measurements. This short-range magnetic correlation becomes evident from diffuse scattering observed at 2 K. The diffuse scattering has been interpreted in terms of a Blech-Averbach function. Received: 30 June 1998 / Revised, accepted: 3 March 1999  相似文献   

Temperature evolution between 50 K and 320 K of the thermal expansion tensor of gypsum derived from neutron powder diffraction data     

K. S. Knight  I. C. Stretton  P. F. Schofield 《Physics and Chemistry of Minerals》1999,26(6):477-483

The unit cell parameters, extracted from Rietveld analysis of neutron powder diffraction data collected between 4.2 K and 320 K, have been used to calculate the temperature evolution of the thermal expansion tensor for gypsum for 50 ≤ T ≤ 320 K. At 300 K the magnitudes of the principal axes are α ₁₁  = 1.2(6) × 10⁻⁶ K⁻¹, α ₂₂  = 36.82(1) × 10⁻⁶ K⁻¹ and α ₃₃  = 25.1(5) × 10⁻⁶ K⁻¹. The maximum axis, α ₂₂ , is parallel to b, and using Institution of Radio Engineers (IRE) convention for the tensor orthonormal basis, the axes α ₁₁ and α ₃₃ have directions equal to (−0.979, 0, 0.201) and (0.201, 0, 0.979) respectively. The orientation and temperature dependent behaviour of the thermal expansion tensor is related to the crystal structure in the I2/a setting. Received 12 February 1998 / Revised, accepted 19 October 1998  相似文献   

High temperature dehydroxylation of muscovite-2M1: a kinetic study by in situ XRPD     

E. Mazzucato  G. Artioli  A. Gualtieri 《Physics and Chemistry of Minerals》1999,26(5):375-381

Muscovite-2M₁ shows a major phase transition at about 800°C, which is generally attributed in the literature to the structural dehydroxylation process, although a number of structural models have been proposed for the dehydroxylated phase, and different transformation mechanisms have also been put forward. The observed first order transformation involves an increase in the cell volume, and it is not clear to date how the cell expansion is related to the loss of hydroxyl groups. The phase change has been re-investigated here by in situ high temperature powder diffraction, both in non-isothermal and isothermal modes, to combine for the first time the structural and the kinetic interpretation of the transformation. The results unequivocally confirm that the reaction taking place in the temperature range 700–1000°C is truly a dehydroxylation process, involving the nucleation and growth of the high temperature dehydroxylated phase, having Al in 5-fold coordination. Structural simulations of the basal peaks of the powder diffraction patterns indicate that the model originally proposed by Udagawa et al. (1974) for the dehydroxylated phase correctly describes the high temperature phase. The kinetic analysis of the isothermal data using an Avrami-type model yields values for the reaction order compatible with a reaction mechanism limited by a monodimensional diffusion step. Apparent activation energy of the process in vacuum is about 251 kJ/mol. Experiments carried out at temperatures much higher than the onset temperature of the reaction show that the dehydroxylation reaction overlaps with the reaction of formation of mullite, the final product in the reaction pathway. Received: 24 April 1998 / Revised, accepted: 12 October 1998  相似文献   

片、粉状触媒合成腔体内压力、温度的变化分析   总被引：2，自引：0，他引：2       下载免费PDF全文

易建宏 《探矿工程》1999,(4):45-48

对比分析了片状触媒合成体系和粉状触媒合成体系,在金刚石合成过程中,合成腔体内压力、温度的变化情况,并结合金刚石合成特征区分布图,分析辽些压力、温度变化对合成金刚石品质的影响,由此,指出粉状触媒是合成金刚石用触媒材料的较佳形态。  相似文献   

粉末压片-X射线荧光光谱法分析富硒土壤样品中的硒及主次量元素   总被引：1，自引：0，他引：1  

李迎春  张磊  尚文郁 《岩矿测试》2022,(1):145-152

目前土壤中Se主要采用原子荧光光谱法测定,存在用酸量大、前处理相对复杂等缺点,对于高含量Se的测定则需要高倍稀释,无疑会扩大分析误差.本文采用粉末压片波谱-能谱复合X射线荧光光谱法测定湖北富硒土壤样品中的Se等17个主次量元素,波谱分析10个元素的同时,能谱分析As、Cu、Rb、Sr、Zr、Ba、Ni等7个元素,大幅节...  相似文献