背景:研究证实运动对多发性硬化症具有潜在的改善作用,但具体机制尚不完全清楚。目的:总结多发性硬化症患者的生理功能变化,探讨运动改善多发性硬化症患者生理功能的机制。方法:应用计算机检索Web of Science、PubMed、中国知网、万方...背景:研究证实运动对多发性硬化症具有潜在的改善作用,但具体机制尚不完全清楚。目的:总结多发性硬化症患者的生理功能变化,探讨运动改善多发性硬化症患者生理功能的机制。方法:应用计算机检索Web of Science、PubMed、中国知网、万方和维普数据库等,中文检索词为“多发性硬化症,脱髓鞘自身免疫疾病,运动,体育锻炼,神经退行性疾病”等,英文检索词为“Multiple sclerosis,Demyelinating Autoimmune Diseases,Exercise,Physical activity,Neurodegenerative diseases”等,文献检索时限为各数据库建库至2024年6月,根据预定的纳入和排除标准,最终筛选出81篇文献进行综述。结果与结论:多发性硬化症患者的生理和功能变化复杂多样,严重影响患者的生活质量和独立生活能力。运动作为一种非药物干预方式,在改善多发性硬化症患者的生理和功能状态方面显示出显著潜力,运动可以缓解疲劳、调节免疫反应、降低压力激素水平、增强血脑屏障功能及促进神经可塑性。然而,当前关于运动治疗多发性硬化症的具体机制研究仍然不足,需要更多高质量、系统性的研究来进一步验证和完善相关结论。未来的研究应聚焦于以下几个方面:进一步探索不同类型和强度运动对多发性硬化症患者生理功能和病情进展的具体影响,找出最适合多发性硬化症患者的运动方案;开展大规模、长期随访的临床试验,验证运动对多发性硬化症患者的长期效果和安全性;结合现代科技手段,如功能性磁共振成像和神经电生理技术,深入揭示运动干预对多发性硬化症患者神经系统的具体作用机制;考虑患者个体差异,制定个性化的运动干预方案,以最大程度地提高干预效果和患者依从性。展开更多
建立了固相支撑液液萃取-气相色谱-三重四极杆串联质谱法(solid phase supported liquid-liquid extraction-gas chromatography-triple quadrupole tandem mass spectrometry,SLE-GC-MS/MS)检测酒中人造食品香料环己基丙酸烯丙酯、乙...建立了固相支撑液液萃取-气相色谱-三重四极杆串联质谱法(solid phase supported liquid-liquid extraction-gas chromatography-triple quadrupole tandem mass spectrometry,SLE-GC-MS/MS)检测酒中人造食品香料环己基丙酸烯丙酯、乙基麦芽酚、反式杨梅醛、顺式杨梅醛、乙基香兰素含量的方法。样品经过硅藻土固相柱支撑液液萃取(SLE)净化,乙酸乙酯洗脱定容后,采用ZB-1701石英毛细管柱分离,多反应监测模式(MRM)检测,以保留时间和离子对定性,定量离子峰面积外标法定量。结果表明:5种人造食品香料在15 min内完成色谱分离,在5~1000μg·L^(-1)范围线性良好,相关系数R^(2)均大于0.99,检出限和定量限分别为1.2~3.0μg·kg^(-1)和4.0~10.0μg·kg^(-1),以三种阴性样品为基质,在不同添加水平下,5种人造食品香料平均回收率为85.7%~99.8%,相对标准偏差(RSD,n=6)在1.7%~7.3%之间。展开更多
目的系统性分析2型糖尿病(T2DM)与小肠细菌过度生长(SIBO)的关系。方法计算机检索PubMed、EMBASE、Web of Science、Cochrane Library、中国知网、万方数据库、维普数据库中关于T2DM和SIBO的文献,检索时间为建库至2024年8月,根据制定的...目的系统性分析2型糖尿病(T2DM)与小肠细菌过度生长(SIBO)的关系。方法计算机检索PubMed、EMBASE、Web of Science、Cochrane Library、中国知网、万方数据库、维普数据库中关于T2DM和SIBO的文献,检索时间为建库至2024年8月,根据制定的纳入和排除标准筛选文献。对纳入的文献进行Meta分析,比较T2DM患者与健康对照者的SIBO发生风险。为探究异质性来源,进行研究设计、研究对象所处大陆及研究质量的亚组分析。结果共纳入18篇文献,5694例研究对象。Meta分析结果显示,与健康对照者比较,T2DM患者发生SIBO的风险增加(OR=3.18,95%CI为2.24~4.53,P<0.001)。亚组分析结果显示,T2DM患者在病例对照研究中发生SIBO的风险增加(OR=6.56,95%CI为3.96~10.86,P<0.001),在横断面研究中发生SIBO的风险亦增加(OR=2.05,95%CI为1.38~3.06,P<0.001);且病例对照研究中T2DM发生SIBO的风险高于横断面研究;亚洲T2DM患者发生SIBO的风险增加(OR=5.85,95%CI为3.09~11.08,P<0.001),欧洲T2DM患者发生SIBO的风险亦增加(OR=2.58,95%CI为1.41~4.73,P=0.002),而北美T2DM患者SIBO的发生风险无显著差异(OR=1.67,95%CI为0.77~3.62,P=0.193),亚洲T2DM患者发生SIBO的风险高于欧洲患者;高质量研究中T2DM患者发生SIBO的风险增加(OR=5.06,95%CI为2.40~10.66,P<0.001),低质量研究中T2DM患者发生SIBO的风险亦增加(OR=2.72,95%CI为1.82~4.09,P<0.001),且高质量研究中T2DM发生SIBO的风险高于低质量研究。结论T2DM患者发生SIBO的风险高于一般健康人群,亚洲T2DM患者发生SIBO的风险高于欧洲患者。展开更多
Aiming to elucidate the hydrogen absorption/desorption cycling properties of Mg-based alloys with in-situ formed Mg_(2)Ni and LaH_(x)(x=2,3)nanocrystallines,the hydrogen storage cycle stability,hydriding/dehydriding c...Aiming to elucidate the hydrogen absorption/desorption cycling properties of Mg-based alloys with in-situ formed Mg_(2)Ni and LaH_(x)(x=2,3)nanocrystallines,the hydrogen storage cycle stability,hydriding/dehydriding cycling kinetics and thermodynamic stability of the experimental alloys have been investigated in detail.The results show that the Mg-Ni-La alloys exhibit improved hydrogen storage cycling properties and can remain storage hydrogen above 5.5 wt%after 200 cycles.With the increase of cycling numbers,the dehydrogenation rates of the experimental samples increase firstly and then gradually decrease,and eventually maintain relative stable state.Microstructure observation reveals that powders sintering and hydrogen decrepitation both exist during hydrogen absorption/desorption cycles due to repeated volume expansion and contraction.Meanwhile,the in-situ formed LaH_(x)(x=2,3)and Mg_(2)Ni nanocrystallines stabilize the microstructures of the particles and hinder the powders sintering.After 200 cycles,the average particle size of the experimental samples decreases and the specific surface area apparently increases,which leads to the decomposition temperatures of MgH_(2)and Mg_(2)NiH_(4)slightly shift to lower temperatures.Moreover,Mg_(2)Ni and LaH_(x)(x=2,3)have been proven to be stable catalysts during long-term cycling,which can still uniformly distribute within the powders after 200 cycles.展开更多
Two-dimensional Ruddlesden-Popper(2DRP)perovskite exhibits excellent stability in perovskite solar cells(PSCs)due to introducing hydrophobic long-chain organic spacers.However,the poor charge transporting property of ...Two-dimensional Ruddlesden-Popper(2DRP)perovskite exhibits excellent stability in perovskite solar cells(PSCs)due to introducing hydrophobic long-chain organic spacers.However,the poor charge transporting property of bulky organic cation spacers limits the performance of 2DRP PSCs.Inspired by the Asite cation alloying strategy in 3D perovskites,2DRP perovskites with a binary spacer can promote charge transporting compared to the unary spacer counterparts.Herein,the superior MA-based 2DRP perovskite films with a binary spacer,including 3-guanidinopropanoic acid(GPA)and 4-fluorophenethylamine(FPEA)are realized.These films(GPA_(0.85)FPEA_(0.15))_(2)MA_(4)Pb_5I_(16)show good morphology,large grain size,decreased trap state density,and preferential orientation of the as-prepared film.Accordingly,the present 2DRP-based PSC with the binary spacer achieves a remarkable efficiency of 18.37%with a V_(OC)of1.15 V,a J_(SC)of 20.13 mA cm^(-2),and an FF of 79.23%.To our knowledge,the PCE value should be the highest for binary spacer MA-based 2DRP(n≤5)PSCs to date.Importantly,owing to the hydrophobic fluorine group of FPEA and the enhanced interlayer interaction by FPEA,the unencapsulated 2DRP PSCs based on binary spacers exhibit much excellent humidity stability and thermal stability than the unary spacer counterparts.展开更多
文摘目的系统性分析2型糖尿病(T2DM)与小肠细菌过度生长(SIBO)的关系。方法计算机检索PubMed、EMBASE、Web of Science、Cochrane Library、中国知网、万方数据库、维普数据库中关于T2DM和SIBO的文献,检索时间为建库至2024年8月,根据制定的纳入和排除标准筛选文献。对纳入的文献进行Meta分析,比较T2DM患者与健康对照者的SIBO发生风险。为探究异质性来源,进行研究设计、研究对象所处大陆及研究质量的亚组分析。结果共纳入18篇文献,5694例研究对象。Meta分析结果显示,与健康对照者比较,T2DM患者发生SIBO的风险增加(OR=3.18,95%CI为2.24~4.53,P<0.001)。亚组分析结果显示,T2DM患者在病例对照研究中发生SIBO的风险增加(OR=6.56,95%CI为3.96~10.86,P<0.001),在横断面研究中发生SIBO的风险亦增加(OR=2.05,95%CI为1.38~3.06,P<0.001);且病例对照研究中T2DM发生SIBO的风险高于横断面研究;亚洲T2DM患者发生SIBO的风险增加(OR=5.85,95%CI为3.09~11.08,P<0.001),欧洲T2DM患者发生SIBO的风险亦增加(OR=2.58,95%CI为1.41~4.73,P=0.002),而北美T2DM患者SIBO的发生风险无显著差异(OR=1.67,95%CI为0.77~3.62,P=0.193),亚洲T2DM患者发生SIBO的风险高于欧洲患者;高质量研究中T2DM患者发生SIBO的风险增加(OR=5.06,95%CI为2.40~10.66,P<0.001),低质量研究中T2DM患者发生SIBO的风险亦增加(OR=2.72,95%CI为1.82~4.09,P<0.001),且高质量研究中T2DM发生SIBO的风险高于低质量研究。结论T2DM患者发生SIBO的风险高于一般健康人群,亚洲T2DM患者发生SIBO的风险高于欧洲患者。
基金supported by Natural Science Foundation of Shaanxi Province,China(2017JM5079)The 111 project(No.B08040)is also acknowledged.
文摘Aiming to elucidate the hydrogen absorption/desorption cycling properties of Mg-based alloys with in-situ formed Mg_(2)Ni and LaH_(x)(x=2,3)nanocrystallines,the hydrogen storage cycle stability,hydriding/dehydriding cycling kinetics and thermodynamic stability of the experimental alloys have been investigated in detail.The results show that the Mg-Ni-La alloys exhibit improved hydrogen storage cycling properties and can remain storage hydrogen above 5.5 wt%after 200 cycles.With the increase of cycling numbers,the dehydrogenation rates of the experimental samples increase firstly and then gradually decrease,and eventually maintain relative stable state.Microstructure observation reveals that powders sintering and hydrogen decrepitation both exist during hydrogen absorption/desorption cycles due to repeated volume expansion and contraction.Meanwhile,the in-situ formed LaH_(x)(x=2,3)and Mg_(2)Ni nanocrystallines stabilize the microstructures of the particles and hinder the powders sintering.After 200 cycles,the average particle size of the experimental samples decreases and the specific surface area apparently increases,which leads to the decomposition temperatures of MgH_(2)and Mg_(2)NiH_(4)slightly shift to lower temperatures.Moreover,Mg_(2)Ni and LaH_(x)(x=2,3)have been proven to be stable catalysts during long-term cycling,which can still uniformly distribute within the powders after 200 cycles.
基金financially supported by the Natural Science Foundation of China(Grant Nos.52372226,52173263,62004167)the Natural Science Basic Research Plan in Shaanxi Province of China(Grant Nos.2022JM-315,2023-JC-QN-0643)+4 种基金the National Key R&D Program of China(Grant No.2022YFB3603703)the Qinchuangyuan High-level Talent Project of Shaanxi(Grant No.QCYRCXM-2022-219)the Ningbo Natural Science Foundation(Grant No.2022J061)the Key Research and Development Program of Shaanxi(Grant No.2023GXLH-091)the Shccig-Qinling Program and the Fundamental Research Funds for the Central Universities。
文摘Two-dimensional Ruddlesden-Popper(2DRP)perovskite exhibits excellent stability in perovskite solar cells(PSCs)due to introducing hydrophobic long-chain organic spacers.However,the poor charge transporting property of bulky organic cation spacers limits the performance of 2DRP PSCs.Inspired by the Asite cation alloying strategy in 3D perovskites,2DRP perovskites with a binary spacer can promote charge transporting compared to the unary spacer counterparts.Herein,the superior MA-based 2DRP perovskite films with a binary spacer,including 3-guanidinopropanoic acid(GPA)and 4-fluorophenethylamine(FPEA)are realized.These films(GPA_(0.85)FPEA_(0.15))_(2)MA_(4)Pb_5I_(16)show good morphology,large grain size,decreased trap state density,and preferential orientation of the as-prepared film.Accordingly,the present 2DRP-based PSC with the binary spacer achieves a remarkable efficiency of 18.37%with a V_(OC)of1.15 V,a J_(SC)of 20.13 mA cm^(-2),and an FF of 79.23%.To our knowledge,the PCE value should be the highest for binary spacer MA-based 2DRP(n≤5)PSCs to date.Importantly,owing to the hydrophobic fluorine group of FPEA and the enhanced interlayer interaction by FPEA,the unencapsulated 2DRP PSCs based on binary spacers exhibit much excellent humidity stability and thermal stability than the unary spacer counterparts.
