Glancing incidence x-ray fluorescence spectrometry using a single-bounce parabolic capillary is proposed for the analysis of layered samples.The divergence of the x-ray beam was 0.33 mrad.In this paper,we used this in...Glancing incidence x-ray fluorescence spectrometry using a single-bounce parabolic capillary is proposed for the analysis of layered samples.The divergence of the x-ray beam was 0.33 mrad.In this paper,we used this instrumental setup to analyze a Si single crystal and a 50 nm HfO_(2) single-layer film deposited on a Si substrate.展开更多
目的探讨温阳抗寒方联合针灸在慢性支气管炎(chronic bronchitis,CB)患者中的应用效果。方法应用随机数字表法将该院2021年5月—2022年5月收治的150例CB患者分成对照组(常规西药治疗)和观察组(常规西药+温阳抗寒方+针灸治疗),每组75例;...目的探讨温阳抗寒方联合针灸在慢性支气管炎(chronic bronchitis,CB)患者中的应用效果。方法应用随机数字表法将该院2021年5月—2022年5月收治的150例CB患者分成对照组(常规西药治疗)和观察组(常规西药+温阳抗寒方+针灸治疗),每组75例;对比两组临床疗效、治疗前后中医证候积分、肺功能指标[用力肺活量(forced vital capacity,FVC)、第1秒用力呼气量(forced expiratory volume in the first second,FEV 1)及呼气流量峰值(peak expiratory flow,PEF)]和炎性因子[白细胞介素-4(interleukin-4,IL-4)、白细胞介素-10(interleukin-10,IL-10)]表达水平。结果治疗后,观察组总有效率高于对照组(P<0.05);治疗后,两组咯痰、咳嗽、口干咽燥、燥热盗汗证候积分均降低(P<0.05),且观察组均低于对照组(P<0.05);治疗后,两组FVC、FEV1及PEF均升高(P<0.05),且观察组均高于对照组(P<0.05);治疗后,两组IL-4、CRP水平均降低(P<0.05),且观察组均低于对照组(P<0.05),两组IL-10均升高(P<0.05),且观察组低于对照组(P<0.05)。结论对CB患者采取温阳抗寒方联合针灸治疗效果显著,可降低患者中医证候积分,提高肺功能,改善炎性反应状态。展开更多
Xuzhou City is an important base for coal production and coal-fired power. To evaluate selenium contamination in this area, we sampled agricultural soil, soil profile, irrigation water, bedrock, coal, fly ash, paddy r...Xuzhou City is an important base for coal production and coal-fired power. To evaluate selenium contamination in this area, we sampled agricultural soil, soil profile, irrigation water, bedrock, coal, fly ash, paddy rice, and vegetables from the north of Xuzhou City, and determined their selenium contents. The background level of selenium in the soil profile was 0.08 mg/kg. The selenium concentrations in agricultural soils and irrigation water were in the range of 0.21-4.08 mg/kg and 0.002-0.29 mg/L, respectively. Soils with high selenium content were located closely to coalmines and power plants. The average selenium concentrations in coal and coal fly ash were 5.46 and 2.81 mg/kg, respectively. In contrast, the concentrations of selenium in bedrock and in the soil profile were very low. These results imply that the high selenium level in agricultural soils is mainly caused by anthropogenic activities, rather than by parent material. The arithmetic mean of selenium concentration in paddy rice was 0.116 mg/kg, and in cabbage was 0.05 mg/kg. The selenium concentration in rice was positively correlated with total selenium concentration in soil, suggesting that selenium in soil is readily transferred into the crops. Furthermore, the estimated dietary intake （88.8 μg） of selenium from paddy rice and cabbage exceeds the recommended dietary allowance （55 μg）. Therefore, there is a potential health risk from consumption of local staple food in the study area.展开更多
基金Project supported by the National Key Research and Development Program of China(Grant No.2021YFF0701202)the National Natural Science Foundation of China(Grant No.11875087)。
文摘Glancing incidence x-ray fluorescence spectrometry using a single-bounce parabolic capillary is proposed for the analysis of layered samples.The divergence of the x-ray beam was 0.33 mrad.In this paper,we used this instrumental setup to analyze a Si single crystal and a 50 nm HfO_(2) single-layer film deposited on a Si substrate.
文摘目的探讨温阳抗寒方联合针灸在慢性支气管炎(chronic bronchitis,CB)患者中的应用效果。方法应用随机数字表法将该院2021年5月—2022年5月收治的150例CB患者分成对照组(常规西药治疗)和观察组(常规西药+温阳抗寒方+针灸治疗),每组75例;对比两组临床疗效、治疗前后中医证候积分、肺功能指标[用力肺活量(forced vital capacity,FVC)、第1秒用力呼气量(forced expiratory volume in the first second,FEV 1)及呼气流量峰值(peak expiratory flow,PEF)]和炎性因子[白细胞介素-4(interleukin-4,IL-4)、白细胞介素-10(interleukin-10,IL-10)]表达水平。结果治疗后,观察组总有效率高于对照组(P<0.05);治疗后,两组咯痰、咳嗽、口干咽燥、燥热盗汗证候积分均降低(P<0.05),且观察组均低于对照组(P<0.05);治疗后,两组FVC、FEV1及PEF均升高(P<0.05),且观察组均高于对照组(P<0.05);治疗后,两组IL-4、CRP水平均降低(P<0.05),且观察组均低于对照组(P<0.05),两组IL-10均升高(P<0.05),且观察组低于对照组(P<0.05)。结论对CB患者采取温阳抗寒方联合针灸治疗效果显著,可降低患者中医证候积分,提高肺功能,改善炎性反应状态。
基金supported by the Geological Survey of China and the Jiangsu Province Program "Multipurpose Geochemical Survey of Jiangsu Province" (No.200312300008)
文摘Xuzhou City is an important base for coal production and coal-fired power. To evaluate selenium contamination in this area, we sampled agricultural soil, soil profile, irrigation water, bedrock, coal, fly ash, paddy rice, and vegetables from the north of Xuzhou City, and determined their selenium contents. The background level of selenium in the soil profile was 0.08 mg/kg. The selenium concentrations in agricultural soils and irrigation water were in the range of 0.21-4.08 mg/kg and 0.002-0.29 mg/L, respectively. Soils with high selenium content were located closely to coalmines and power plants. The average selenium concentrations in coal and coal fly ash were 5.46 and 2.81 mg/kg, respectively. In contrast, the concentrations of selenium in bedrock and in the soil profile were very low. These results imply that the high selenium level in agricultural soils is mainly caused by anthropogenic activities, rather than by parent material. The arithmetic mean of selenium concentration in paddy rice was 0.116 mg/kg, and in cabbage was 0.05 mg/kg. The selenium concentration in rice was positively correlated with total selenium concentration in soil, suggesting that selenium in soil is readily transferred into the crops. Furthermore, the estimated dietary intake （88.8 μg） of selenium from paddy rice and cabbage exceeds the recommended dietary allowance （55 μg）. Therefore, there is a potential health risk from consumption of local staple food in the study area.
