目的探讨脉压指数与颅内外动脉硬化的相关性。方法收集我院神经内科住院的脑血管病、周围性眩晕、头痛等患者255例。根据颈部血管彩色多普勒超声及头颈部CT血管成像检查分为正常组99例,斑块组53例,轻度狭窄组53例(狭窄率<30%),中度...目的探讨脉压指数与颅内外动脉硬化的相关性。方法收集我院神经内科住院的脑血管病、周围性眩晕、头痛等患者255例。根据颈部血管彩色多普勒超声及头颈部CT血管成像检查分为正常组99例,斑块组53例,轻度狭窄组53例(狭窄率<30%),中度狭窄组29例(狭窄率30%~69%),重度狭窄组21例(狭窄率70%~99%),根据不同程度狭窄组又分为颅内狭窄组68例及颅外狭窄组35例。记录患者一般情况及血液学指标,完善动态血压,计算平均脉压指数。结果与正常组比较,轻度狭窄组、中度狭窄组和重度狭窄组脉压指数明显升高(0.41±0.08、0.41±0.05 vs 0.38±0.06,P<0.01;0.43±0.05 vs 0.38±0.06,P<0.05)。颅内狭窄组与颅外狭窄组脉压指数比较,差异无统计学意义(0.41±0.06 vs 0.40±0.05,P>0.05)。相关性分析显示,颅内外动脉硬化与脉压指数、高血压、年龄呈正相关(P<0.01),与性别、糖尿病、TC、TG和LDL-C不相关(P>0.05)。结论脉压指数与颅内外动脉硬化具有相关性。展开更多
目的评价生物反馈疗法在治疗前列腺癌根治术后尿失禁的疗效。方法用计算机检索PubMed、The Cochrane Library、Medline、EMbase、web of Science、中国生物医学数据库、万方数据库、中国知网和维普数据库,检索时间为建库至2020年8月。采...目的评价生物反馈疗法在治疗前列腺癌根治术后尿失禁的疗效。方法用计算机检索PubMed、The Cochrane Library、Medline、EMbase、web of Science、中国生物医学数据库、万方数据库、中国知网和维普数据库,检索时间为建库至2020年8月。采用RevMan5.4软件对数据进行Meta分析。结果共纳入18项研究,1374例患者。Meta分析显示,生物反馈疗法在提高前列腺癌根治术术后尿失禁患者早期尿控恢复率,降低早期尿失禁严重程度,缩短尿失禁持续时间方面有效(P<0.05),但在改善前列腺癌根治术后尿失禁患者生活质量方面,差异无统计学意义(P>0.05)结论生物反馈辅助PFEM有助于前列腺癌根治术后尿失禁患者早期尿控能力的恢复,降低其早期尿失禁严重程度,并有效缩短其尿失禁持续时间,但在提高前列腺根治术术后尿失禁患者生活质量方面的效果不明显。展开更多
The objective of this study was to identify volatile organic compounds(VOCs)from flour,Tribolium castaneum(Herbst)and flour infested by T.castaneum separately,to confirm the difference of healthy flour and flour infes...The objective of this study was to identify volatile organic compounds(VOCs)from flour,Tribolium castaneum(Herbst)and flour infested by T.castaneum separately,to confirm the difference of healthy flour and flour infested by T.castaneum and to explore the new technique to diagnose stored flour’s quality by its VOCs change.Headspace-solid phase microextraction(HS-SPME)coupled with gas chromatography(GC)and gas chromatography–mass spectrometry(GC–MS)were used to detect the VOCs of three different samples.Totally,71 different compounds were identified in flour,T.castaneum and T.castaneum infested flour.Therefore,27 VOCs were identified from flour alone,32 VOCs from T.castaneum and 39 VOCs from T.castaneum infested flour.The compound 2-ethyl-2,5-cyclohexadiene-1,4-dione is only found in T.castaneum infested flour.This suggests that 2-ethyl-2,5-cyclohexadiene-1,4-dione can be a useful VOC for detecting T.castaneum in flour.展开更多
The catalytic conversion of ethane to high value-added chemicals is significantly important for utilization of hydrocarbon resources.However, it is a great challenge due to the typically required high temperature(>...The catalytic conversion of ethane to high value-added chemicals is significantly important for utilization of hydrocarbon resources.However, it is a great challenge due to the typically required high temperature(> 400 ℃) conditions.Herein, a highly active catalytic conversion process of ethane at room temperature(25 ℃) is reported on single iron atoms confined in graphene via the porphyrin-like N4-coordination structures.Combining with the operando time of flight mass spectrometer and density functional theory calculations, the reaction is identified as a radical mechanism, in which the C–H bonds of the same C atom are preferentially and sequentially activated, generating the value-added C2 chemicals, simultaneously avoiding the over-oxidation of the products to CO2.The in-situ formed O–FeN4–O structure at the single iron atom serves as the active center for the reaction and facilitates the formation of ethyl radicals.This work deepens the understanding of alkane C–H activation on the FeN4 center and provides the reference in development of efficient catalyst for selective oxidation of light alkane.展开更多
文摘目的探讨脉压指数与颅内外动脉硬化的相关性。方法收集我院神经内科住院的脑血管病、周围性眩晕、头痛等患者255例。根据颈部血管彩色多普勒超声及头颈部CT血管成像检查分为正常组99例,斑块组53例,轻度狭窄组53例(狭窄率<30%),中度狭窄组29例(狭窄率30%~69%),重度狭窄组21例(狭窄率70%~99%),根据不同程度狭窄组又分为颅内狭窄组68例及颅外狭窄组35例。记录患者一般情况及血液学指标,完善动态血压,计算平均脉压指数。结果与正常组比较,轻度狭窄组、中度狭窄组和重度狭窄组脉压指数明显升高(0.41±0.08、0.41±0.05 vs 0.38±0.06,P<0.01;0.43±0.05 vs 0.38±0.06,P<0.05)。颅内狭窄组与颅外狭窄组脉压指数比较,差异无统计学意义(0.41±0.06 vs 0.40±0.05,P>0.05)。相关性分析显示,颅内外动脉硬化与脉压指数、高血压、年龄呈正相关(P<0.01),与性别、糖尿病、TC、TG和LDL-C不相关(P>0.05)。结论脉压指数与颅内外动脉硬化具有相关性。
文摘目的评价生物反馈疗法在治疗前列腺癌根治术后尿失禁的疗效。方法用计算机检索PubMed、The Cochrane Library、Medline、EMbase、web of Science、中国生物医学数据库、万方数据库、中国知网和维普数据库,检索时间为建库至2020年8月。采用RevMan5.4软件对数据进行Meta分析。结果共纳入18项研究,1374例患者。Meta分析显示,生物反馈疗法在提高前列腺癌根治术术后尿失禁患者早期尿控恢复率,降低早期尿失禁严重程度,缩短尿失禁持续时间方面有效(P<0.05),但在改善前列腺癌根治术后尿失禁患者生活质量方面,差异无统计学意义(P>0.05)结论生物反馈辅助PFEM有助于前列腺癌根治术后尿失禁患者早期尿控能力的恢复,降低其早期尿失禁严重程度,并有效缩短其尿失禁持续时间,但在提高前列腺根治术术后尿失禁患者生活质量方面的效果不明显。
文摘The objective of this study was to identify volatile organic compounds(VOCs)from flour,Tribolium castaneum(Herbst)and flour infested by T.castaneum separately,to confirm the difference of healthy flour and flour infested by T.castaneum and to explore the new technique to diagnose stored flour’s quality by its VOCs change.Headspace-solid phase microextraction(HS-SPME)coupled with gas chromatography(GC)and gas chromatography–mass spectrometry(GC–MS)were used to detect the VOCs of three different samples.Totally,71 different compounds were identified in flour,T.castaneum and T.castaneum infested flour.Therefore,27 VOCs were identified from flour alone,32 VOCs from T.castaneum and 39 VOCs from T.castaneum infested flour.The compound 2-ethyl-2,5-cyclohexadiene-1,4-dione is only found in T.castaneum infested flour.This suggests that 2-ethyl-2,5-cyclohexadiene-1,4-dione can be a useful VOC for detecting T.castaneum in flour.
基金the financial support from the Ministry of Science and Technology of China (Nos.2016YFA0204100 and 2016YFA0200200)the National Natural Science Foundation of China (Nos.21890753, 21573220 and 21802124)+2 种基金the Key Research Program of Frontier Sciences of the Chinese Academy of Sciences (No.QYZDB-SSW-JSC020)the DNL Cooperation Fund, CAS (No.DNL180201)the financial and technique supports from the Westlake Education Foundation, Supercomputing Systems in the Information Technology Center of Westlake University
文摘The catalytic conversion of ethane to high value-added chemicals is significantly important for utilization of hydrocarbon resources.However, it is a great challenge due to the typically required high temperature(> 400 ℃) conditions.Herein, a highly active catalytic conversion process of ethane at room temperature(25 ℃) is reported on single iron atoms confined in graphene via the porphyrin-like N4-coordination structures.Combining with the operando time of flight mass spectrometer and density functional theory calculations, the reaction is identified as a radical mechanism, in which the C–H bonds of the same C atom are preferentially and sequentially activated, generating the value-added C2 chemicals, simultaneously avoiding the over-oxidation of the products to CO2.The in-situ formed O–FeN4–O structure at the single iron atom serves as the active center for the reaction and facilitates the formation of ethyl radicals.This work deepens the understanding of alkane C–H activation on the FeN4 center and provides the reference in development of efficient catalyst for selective oxidation of light alkane.
