目的基于真实世界研究探讨全国名中医庞国明教授纯中医缓解2型糖尿病(T2DM)临床特征,为临床实践提供借鉴和参考。方法采集2020年1月—2022年10月开封市中医院庞国明教授工作室就诊的符合T2DM诊断,并采用纯中医“三辨诊疗模式”“序贯三...目的基于真实世界研究探讨全国名中医庞国明教授纯中医缓解2型糖尿病(T2DM)临床特征,为临床实践提供借鉴和参考。方法采集2020年1月—2022年10月开封市中医院庞国明教授工作室就诊的符合T2DM诊断,并采用纯中医“三辨诊疗模式”“序贯三法”治疗方案且达到缓解标准的T2DM患者共计30例。采集患者的人口学资料、中医证型及纯中医治疗前、治疗达标停药时、缓解时患者的体质量指数、血生化检验指标,计算纯中医治疗时长,使用稳态模型评估法评估胰岛素抵抗指数和胰岛β细胞功能指数。分析患者的临床特征、中医证型分布,比较纯中医治疗前与治疗达标停药时、缓解时各项指标的差异。结果患者平均年龄(50.77±9.77)岁;平均病程中位数22(10.5,39.0)个月;平均体质量指数中位数27.75(25.87,28.80)kg/m^(2),中医证型分布情况:痰浊中阻证频率最高,其次气阴两虚证。与治疗前比较,患者停药时空腹血糖(FPG)、餐后1 h血糖(1 h PG)、2 h PG、3 h PG、空腹胰高血糖素(FGC)、1 h GC、2 h GC、3 h GC、糖化血红蛋白(HbA1c)、果糖胺(FMN)、胰岛素抵抗指数(HOMA-IR)、体质量指数(BMI)、总胆固醇(TC)水平明显下降,差异有统计学意义(P<0.05),1 h C肽(CP)、胰岛β细胞功能指数(HOMA-β)水平较前升高,差异有统计学意义(P<0.05),与治疗前比较,缓解时FPG、1 h PG、2 h PG、1 h GC、2 h GC、HbA1c、BMI、3 h PG、FGC、3 h GC、TC、HOMA-IR水平明显下降,差异有统计学意义(P<0.05),HOMA-β、1 h CP、高密度脂蛋白胆固醇(HDL-C)水平较前升高,差异有统计学意义(P<0.05)。结论纯中医缓解T2DM患者以糖尿病病程<5年,超重或肥胖为主,纯中医治疗时长多集中在3~12个月,中医证型以痰浊中阻证为主。纯中医可能通过降低体质量,改善胰岛素抵抗,改善胰岛β细胞功能,降低胰高血糖素等途径实现缓解T2DM。展开更多
The segmented water control technology for bottom water reservoirs can effectively delay the entry of bottom water and adjust the production profile.To clarify the impact of different methods on horizontal well produc...The segmented water control technology for bottom water reservoirs can effectively delay the entry of bottom water and adjust the production profile.To clarify the impact of different methods on horizontal well production with different reservoir conditions and to provide theoretical support for the scientific selection of methods for bottom water reservoirs,a numerical simulation method is presented in this study,which is able to deal with wellbore reservoir coupling under screen tube,perforation,and ICD(Inflow Control Device)completion.Assuming the geological characteristics of the bottom-water conglomerate reservoir in the Triassic Formation of the Tahe Block 9 as a test case,the three aforementioned completion methods are tested to predict the transient production characteristics.The impact of completion parameters,reservoir permeability,bottom-water energy,and individual well control on the time to encounter water in horizontal wells(during a water-free production period)is discussed.A boundary chart for the selection of completion methods is introduced accordingly.The results show that the optimized ICD completion development effect for heterogeneous reservoirs is the best,followed by optimized perforation completion.Permeability is the main factor affecting the performances of completion methods,while bottom water energy and single well controlled reserves have a scarce impact.The average permeability of the reservoir is less than 500 mD,and ICD has the best water control effect.If the permeability is greater than 500 mD,the water control effect of perforation completion becomes a better option.展开更多
The aim of this study was to assess the effects of Sangrovit?, a standardized preparation of Macleaya cordata extract (MCE), on the health status and performance in weaned piglets. A total of 128 weaned piglets were r...The aim of this study was to assess the effects of Sangrovit?, a standardized preparation of Macleaya cordata extract (MCE), on the health status and performance in weaned piglets. A total of 128 weaned piglets were randomly divided into four groups (n = 32, 16/sex/group) and fed either a control feed (T1) or the control feed supplemented with 100 mg/kg (T2), 500 mg/kg (T3), or 1000 mg/kg (T4) Sangrovit? (resulting in 0, 3.5, 17.5, 35 mg MCE/kg feed, respectively) for ninety days. The parameters for growth and health status were evaluated during the trial and blood was collected on Day 0 and Day 91 for hematology and biochemistry analysis. After the animals were sacrificed, the weight of the major organs and tissues was measured and histopathological examination on the organs from 8 animals in each group (4/sex/group) was performed. The results showed no statistically significant differences in live weight, feed intake, and average daily weight gain between the treatment and control groups. The feed containing 100, 500, or 1000 mg/kg Sangrovit? was well tolerated by piglets, with no adverse effects noted during the feeding period or in the histopathological results. The majority of the hematological and blood biochemistry parameters displayed no significant changes between the control and treatment groups. Compared to the control group, some hematological parameters including MCV, platelets concentration, and APTT were modified in some but not all treatment groups. Some significant changes in the blood biochemistry parameters were found in the treatment groups including levels in bile acid, haptoglobin, total serum protein, and GTT, as well as creatine kinase activity, but those changes were not toxicologically significant because no observed changes were seen in other similar biomarkers. In sum, this study demonstrated that the addition of Sangrovit? to swine feed at up to 1000 mg/kg does not result in any toxicological effects to the health status and growth of weaned piglets.展开更多
Bimetallic copper-steel composite could be an effective structural material to improve the performance of traditional nickel-aluminum bronze(NAB)ship propeller due to its high structural strength and corrosion resista...Bimetallic copper-steel composite could be an effective structural material to improve the performance of traditional nickel-aluminum bronze(NAB)ship propeller due to its high structural strength and corrosion resistance.In this work,the defect-free NAB coatings has been successfully fabricated by laser direct depositing technique on the 17-4PH stainless steel substrate.The phase constitution,microstructure characteristics and hardness properties were investigated in details.The XRD results showed that the coatings mainly consisted ofα-Cu,Fe and intermetallicκphases despite the diffraction peaks shifted more than 0.5°,which may due to the influence of the Ni,Fe and Al atoms dissolved into Cu-matrix.The microstructures of the coatings were affected significantly by laser energy density according to SEM and EDS results.The top region of the coating was more undercooled during solidification,therefore the grains at this region was much finer than that at the bottom region.The higher energy input would lead to coarser grains.Fe-rich dendrites and spherical particles were found in the Cu matrix,which could be a result of liquid separation.The hardness of the coating is in the range of 204 HV0.2–266 HV0.2 which is higher than traditional as-cast NAB.The uneven distribution of Fe-rich phases as well as the hardκphases could be the main reasons for the fluctuations of the hardness value.Tensile fracture occurred at bronze side,not at transition zone,which shows there is a good interfacial bonding between the two metals produced by laser cladding.展开更多
Background: Rapid economic development in China has resulted in an increase in severe air pollution in city groups such as the Beijing-Tianjin-Hebei Metropolitan Region. PM2.5(fine particles with an aerodynamic equiva...Background: Rapid economic development in China has resulted in an increase in severe air pollution in city groups such as the Beijing-Tianjin-Hebei Metropolitan Region. PM2.5(fine particles with an aerodynamic equivalent diameter of 2.5 μm or less) is one of the most important pollutants. The deposition process is an important way of removing particles from the air. To evaluate the effect of an urban forest on atmospheric particle removal, a concentration gradient method was used to measure the deposition velocities of water-soluble inorganics in PM2.5 in two national forest parks in Beijing, China. The following eight water-soluble inorganic ions in PM2.5 were investigated: sodium, ammonium, potassium, magnesium, calcium, chloride, nitrate, and sulfate.Methods: Samples were taken from two sites in Beijing from the 7 th to the 15 th May, 2013. The concentrations of water-soluble inorganic ions were analyzed with ion chromatography. We used the concentration gradient technique to estimate the deposition flux and velocity. To determine the relationships between leaf traits and particle accumulation, typical leaf samples from each selected species were studied using scanning electron microscopy.Results: The total deposition flux and total deposition velocity during the daytime were higher than those at night.Sulfate showed the biggest deposition flux and velocity at both study sites, whereas the other ions showed different trends at each site. Result from higher proportion of coniferous to broadleaved trees, the total deposition flux of the eight ions measured in Jiufeng National Forest Park was greater than that in Olympic Forest Park.Conclusions: The deposition velocity was affected by meteorological conditions such as wind speed, temperature,and humidity. The deposition velocity was also influenced by tree species. The surface of plants is an important factor influencing particle deposition. The results of this study may help in assessing the effects of forestry systems on particle removal and provide evidence for urban air pollution control and afforestation of urban areas.展开更多
Objective:To observe the curative effect of microwave ablation(MWA)for primary carcinoma of the liver under the assistance by computed tomography/type-B ultrasonography.Methods:This was a retrospective analysis of 73 ...Objective:To observe the curative effect of microwave ablation(MWA)for primary carcinoma of the liver under the assistance by computed tomography/type-B ultrasonography.Methods:This was a retrospective analysis of 73 patients with primary carcinoma of the liver treated by MWA at the PLA401 Hospital from November 2008 to May 2013.Complete ablation rate,alpha-fetoprotein(AFP)level.展开更多
文摘目的基于真实世界研究探讨全国名中医庞国明教授纯中医缓解2型糖尿病(T2DM)临床特征,为临床实践提供借鉴和参考。方法采集2020年1月—2022年10月开封市中医院庞国明教授工作室就诊的符合T2DM诊断,并采用纯中医“三辨诊疗模式”“序贯三法”治疗方案且达到缓解标准的T2DM患者共计30例。采集患者的人口学资料、中医证型及纯中医治疗前、治疗达标停药时、缓解时患者的体质量指数、血生化检验指标,计算纯中医治疗时长,使用稳态模型评估法评估胰岛素抵抗指数和胰岛β细胞功能指数。分析患者的临床特征、中医证型分布,比较纯中医治疗前与治疗达标停药时、缓解时各项指标的差异。结果患者平均年龄(50.77±9.77)岁;平均病程中位数22(10.5,39.0)个月;平均体质量指数中位数27.75(25.87,28.80)kg/m^(2),中医证型分布情况:痰浊中阻证频率最高,其次气阴两虚证。与治疗前比较,患者停药时空腹血糖(FPG)、餐后1 h血糖(1 h PG)、2 h PG、3 h PG、空腹胰高血糖素(FGC)、1 h GC、2 h GC、3 h GC、糖化血红蛋白(HbA1c)、果糖胺(FMN)、胰岛素抵抗指数(HOMA-IR)、体质量指数(BMI)、总胆固醇(TC)水平明显下降,差异有统计学意义(P<0.05),1 h C肽(CP)、胰岛β细胞功能指数(HOMA-β)水平较前升高,差异有统计学意义(P<0.05),与治疗前比较,缓解时FPG、1 h PG、2 h PG、1 h GC、2 h GC、HbA1c、BMI、3 h PG、FGC、3 h GC、TC、HOMA-IR水平明显下降,差异有统计学意义(P<0.05),HOMA-β、1 h CP、高密度脂蛋白胆固醇(HDL-C)水平较前升高,差异有统计学意义(P<0.05)。结论纯中医缓解T2DM患者以糖尿病病程<5年,超重或肥胖为主,纯中医治疗时长多集中在3~12个月,中医证型以痰浊中阻证为主。纯中医可能通过降低体质量,改善胰岛素抵抗,改善胰岛β细胞功能,降低胰高血糖素等途径实现缓解T2DM。
文摘The segmented water control technology for bottom water reservoirs can effectively delay the entry of bottom water and adjust the production profile.To clarify the impact of different methods on horizontal well production with different reservoir conditions and to provide theoretical support for the scientific selection of methods for bottom water reservoirs,a numerical simulation method is presented in this study,which is able to deal with wellbore reservoir coupling under screen tube,perforation,and ICD(Inflow Control Device)completion.Assuming the geological characteristics of the bottom-water conglomerate reservoir in the Triassic Formation of the Tahe Block 9 as a test case,the three aforementioned completion methods are tested to predict the transient production characteristics.The impact of completion parameters,reservoir permeability,bottom-water energy,and individual well control on the time to encounter water in horizontal wells(during a water-free production period)is discussed.A boundary chart for the selection of completion methods is introduced accordingly.The results show that the optimized ICD completion development effect for heterogeneous reservoirs is the best,followed by optimized perforation completion.Permeability is the main factor affecting the performances of completion methods,while bottom water energy and single well controlled reserves have a scarce impact.The average permeability of the reservoir is less than 500 mD,and ICD has the best water control effect.If the permeability is greater than 500 mD,the water control effect of perforation completion becomes a better option.
文摘The aim of this study was to assess the effects of Sangrovit?, a standardized preparation of Macleaya cordata extract (MCE), on the health status and performance in weaned piglets. A total of 128 weaned piglets were randomly divided into four groups (n = 32, 16/sex/group) and fed either a control feed (T1) or the control feed supplemented with 100 mg/kg (T2), 500 mg/kg (T3), or 1000 mg/kg (T4) Sangrovit? (resulting in 0, 3.5, 17.5, 35 mg MCE/kg feed, respectively) for ninety days. The parameters for growth and health status were evaluated during the trial and blood was collected on Day 0 and Day 91 for hematology and biochemistry analysis. After the animals were sacrificed, the weight of the major organs and tissues was measured and histopathological examination on the organs from 8 animals in each group (4/sex/group) was performed. The results showed no statistically significant differences in live weight, feed intake, and average daily weight gain between the treatment and control groups. The feed containing 100, 500, or 1000 mg/kg Sangrovit? was well tolerated by piglets, with no adverse effects noted during the feeding period or in the histopathological results. The majority of the hematological and blood biochemistry parameters displayed no significant changes between the control and treatment groups. Compared to the control group, some hematological parameters including MCV, platelets concentration, and APTT were modified in some but not all treatment groups. Some significant changes in the blood biochemistry parameters were found in the treatment groups including levels in bile acid, haptoglobin, total serum protein, and GTT, as well as creatine kinase activity, but those changes were not toxicologically significant because no observed changes were seen in other similar biomarkers. In sum, this study demonstrated that the addition of Sangrovit? to swine feed at up to 1000 mg/kg does not result in any toxicological effects to the health status and growth of weaned piglets.
文摘Bimetallic copper-steel composite could be an effective structural material to improve the performance of traditional nickel-aluminum bronze(NAB)ship propeller due to its high structural strength and corrosion resistance.In this work,the defect-free NAB coatings has been successfully fabricated by laser direct depositing technique on the 17-4PH stainless steel substrate.The phase constitution,microstructure characteristics and hardness properties were investigated in details.The XRD results showed that the coatings mainly consisted ofα-Cu,Fe and intermetallicκphases despite the diffraction peaks shifted more than 0.5°,which may due to the influence of the Ni,Fe and Al atoms dissolved into Cu-matrix.The microstructures of the coatings were affected significantly by laser energy density according to SEM and EDS results.The top region of the coating was more undercooled during solidification,therefore the grains at this region was much finer than that at the bottom region.The higher energy input would lead to coarser grains.Fe-rich dendrites and spherical particles were found in the Cu matrix,which could be a result of liquid separation.The hardness of the coating is in the range of 204 HV0.2–266 HV0.2 which is higher than traditional as-cast NAB.The uneven distribution of Fe-rich phases as well as the hardκphases could be the main reasons for the fluctuations of the hardness value.Tensile fracture occurred at bronze side,not at transition zone,which shows there is a good interfacial bonding between the two metals produced by laser cladding.
基金supported by the grants from the Beijing Collaborative Innovation Center for eco-environmental improvement with forestry and fruit trees(PXM2017_014207_000024)the Special Found for Beijing Common Construction Project for Beijing Laboratory of Urban and Rural Ecological Environment,Beijing Municipal Education Commission
文摘Background: Rapid economic development in China has resulted in an increase in severe air pollution in city groups such as the Beijing-Tianjin-Hebei Metropolitan Region. PM2.5(fine particles with an aerodynamic equivalent diameter of 2.5 μm or less) is one of the most important pollutants. The deposition process is an important way of removing particles from the air. To evaluate the effect of an urban forest on atmospheric particle removal, a concentration gradient method was used to measure the deposition velocities of water-soluble inorganics in PM2.5 in two national forest parks in Beijing, China. The following eight water-soluble inorganic ions in PM2.5 were investigated: sodium, ammonium, potassium, magnesium, calcium, chloride, nitrate, and sulfate.Methods: Samples were taken from two sites in Beijing from the 7 th to the 15 th May, 2013. The concentrations of water-soluble inorganic ions were analyzed with ion chromatography. We used the concentration gradient technique to estimate the deposition flux and velocity. To determine the relationships between leaf traits and particle accumulation, typical leaf samples from each selected species were studied using scanning electron microscopy.Results: The total deposition flux and total deposition velocity during the daytime were higher than those at night.Sulfate showed the biggest deposition flux and velocity at both study sites, whereas the other ions showed different trends at each site. Result from higher proportion of coniferous to broadleaved trees, the total deposition flux of the eight ions measured in Jiufeng National Forest Park was greater than that in Olympic Forest Park.Conclusions: The deposition velocity was affected by meteorological conditions such as wind speed, temperature,and humidity. The deposition velocity was also influenced by tree species. The surface of plants is an important factor influencing particle deposition. The results of this study may help in assessing the effects of forestry systems on particle removal and provide evidence for urban air pollution control and afforestation of urban areas.
文摘Objective:To observe the curative effect of microwave ablation(MWA)for primary carcinoma of the liver under the assistance by computed tomography/type-B ultrasonography.Methods:This was a retrospective analysis of 73 patients with primary carcinoma of the liver treated by MWA at the PLA401 Hospital from November 2008 to May 2013.Complete ablation rate,alpha-fetoprotein(AFP)level.
