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Journal of Energy Chemistry 2022年第7期31卷 472-479,I0012页

作者： Mengzhou Yu jiqi zheng Ming Guo School of Chemical Engineering Dalian University of TechnologyDalian 116024LiaoningChina College of Environment and Chemical Engineering Dalian UniversityDalian 116622LiaoningChina Shanghai Institute of Space Power-Sources Shanghai 200245China

The development of stable electrocatalysts with high hydrogen and oxygen evolution reactions (HER and OER) activity in alkaline electrolytes is critical to renewable energy conversion technologies,such as electrochemical water splitting.In this work,a novel strategy for engineering water splitting electrocatalysts in alkaline electrolyte was developed by synergistically coupling La-doped Ni Fe-layered double hydroxides (Ni Fe-LDH) nanosheets onto three-dimensional (3D) vertically aligned MXene nanosheets on macroporous nickel foam (NF) substrates (Ni Fe La-LDH/v-MXene/NF).The electrocatalytic performance of the prepared Ni Fe La-LDH/v-MXene/NF is enhanced by the synergy of strong electronic interaction among multiple metal centers and unique vertically aligned porous MXene with increased active surface area,accelerated reaction kinetics and improved water adsorption and dissociation ability.To reach the commercially required current density (500 m A cm^(-2)),the Ni Fe La-LDH/v-MXene/NF exhibits greatly reduced overpotentials of 233 and 255 m V for HER and OER,respectively,along with excellent durability.Moreover,an alkaline electrolyzer driven by Ni Fe La-LDH/v-MXene/NF delivers a lower cell voltage(1.71 V) compared with that of Pt/C-RuO_(2) couple to achieve the current density of 500 m A cm^(-2).

关键词： Bifunctional electrocatalyst MXene Layered double hydroxide Lanthanum Overall water splitting

High adsorption of Cd(Ⅱ)by modification of synthetic zeolites Y,A and mordenite with thiourea

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Chinese Journal of Chemical Engineering 2020年第12期28卷 3117-3125页

作者： Shaoqing Zhang Tianming Lv Yang Mu jiqi zheng Changgong Meng Anhui Science and Technology University Bengbu 239000China School of chemical engineering Dalian University of TechnologyDalian 116024China Department of materials science and engineering University of WashingtonSeattleWA 98125USA

Zeolites Y,A and mordenite(ZY,ZA and ZM)were obtained from diatomite in a template-free system,and the products were modified by thiourea(TU).Characterization studies results indicated that the TU molecules were loaded onto the exterior surfaces of the synthetic zeolites as well as the channels.Elemental analysis and energy-dispersive X-ray spectrometer proved that the TU molecules loaded on to ZA were more than ZY and ZM.Removal of Cd(Ⅱ)was investigated,and itwas found that themodified zeolites have higher removal capacity,modified ZA is especially noticeable.In the adsorption experiments,the effects of various parameters such as sorbent content,contact time,concentration of cadmium solution,pH,selectivity and regeneration were discussed.At the best removal efficiency by modified zeolites,the maximum adsorption capacity is 94.3 mg·g^−1,103.2 mg·g^−1 and 89.7 mg·g^−1 at 25℃,respectively.The sorbents show good efficiency for the removal of Cd(Ⅱ)in the presence of different multivalent cations and have good regeneration effect.For the modified samples,removal experiments take place via ion exchange and complexation processes.

关键词： Diatomite Zeolite Thiourea Adsorption Cd(Ⅱ)removal

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唐氏综合征的认知与筛查之路

中华围产医学杂志 2024年第4期27卷 344-349页

作者：郑佶祺唐文佩北京大学医学人文学院北京100191

唐氏综合征(Down’s syndrome)是一种较为典型的遗传相关智力障碍,由21号染色体的全部或部分复制引起,通常伴有发育迟缓、轻至中度智力障碍和特征性体征,又称21-三体。据世界卫生组织统计,每1 000个活产婴儿中就有1个唐氏综合征患儿[1]... 详细信息

唐氏综合征(Down’s syndrome)是一种较为典型的遗传相关智力障碍,由21号染色体的全部或部分复制引起,通常伴有发育迟缓、轻至中度智力障碍和特征性体征,又称21-三体。据世界卫生组织统计,每1 000个活产婴儿中就有1个唐氏综合征患儿[1]。患儿常呈现发育不良、眼睛倾斜、四肢短小、上腭狭窄及牙齿异常等相貌特征(图1)。我国唐氏综合征的发生率约为14.7/10 000[2]。唐氏综合征患儿的出生通常会给家庭和社会带来极大的精神和经济负担。自1862年唐氏综合征被首次提出以来,科学家们便不断探索其病因,开发产前筛查方法,以期及时干预唐氏综合征相关妊娠。目前,唐氏综合征筛查已经成为常规的产前筛查项目。本文以唐氏综合征从发现到筛查的历史沿革为主要脉络,旨在呈现唐氏综合征进入医学视阈并逐渐被科学化的历史图景,以了解科学发现对筛查实践的影响。

关键词：产前筛查唐氏综合征上腭智力障碍相貌特征发育不良 21号染色体活产婴儿

PVA-assisted hydrated vanadium pentoxide/reduced graphene oxide films for excellent Li^(+)and Zn^(2+)storage properties

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Journal of Materials Science & Technology 2021年第24期83卷 7-17页

作者： Tao Hu Jingjing Sun Yifu Zhang Yanyan Liu Hanmei Jiang Xueying Dong jiqi zheng Changgong Meng Chi Huang State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalian116024China College of Chemistry and Molecular Sciences Wuhan UniversityWuhan430072China

Low-cost,high safety and environment-friendly aqueous energy storage systems(ESSs)are huge potential for grid-level energy storage,but the(de)intercalation of metal ions in the electrode materials(e.***.vanadium oxides)to obtain superior long-term cycling stability is a significant challenge.Herein,we demonstrate that polyvinyl alcohol(PVA)-assisted hydrated vanadium pentoxide/reduced graphene oxide(V_(2)O_(5)·n H_(2)O/r GO/PVA,denoted as the VGP)films enable long cycle stability and high capacity for the Li^(+)and Zn^(2+)storages in both the VGP//Li Cl(aq)//VGP and the VGP//Zn SO4(aq)//Zn cells.The binderfree VGP films are synthesized by a one-step hydrothermal method combination with the filtration.The extensive hydrogen bonds are formed among PVA,GO and H_(2)O,and they act as structural pillars and connect the adjacent layers as glue,which contributes to the ultrahigh specific capacitance and ultralong cyclic performance of Li^(+)and Zn^(2+)storage properties.As for Li^(+)storage,the binder-free VGP4 film(4mg PVA)electrode achieves the highest specific capacitance up to 1381 F g^(-1)at 1.0 A g^(-1)in the three-electrode system and 962 F g^(-1)at 1.0 A g^(-1)in the symmetric two-electrode system.It also behaves the outstanding cyclic performance with the capacitance retention of 96.5%after 15000 cycles in the three-electrode system and 99.7%after 25000 cycles in the symmetric two-electrode system.As for Zn^(2+)storage,the binder-free VGP4 film electrode exhibits the high specific capacity of 184 m A h g^(-1)at 0.5A g^(-1)in the VGP4//Zn SO4(aq)//Zn cell and the superb cycle performance of 98.5%after 25000 cycles.This work not only provides a new strategy for the construction of vanadium oxides composites and demonstrates the potential application of PVA-assisted binder-free film with excellent electrochemical properties,but also extends to construct other potential electrode materials for metal ion storage cells.

关键词： V_(2)O_(5)·nH_(2)O/rGO/PVA film Li+storage Zn^(2+)storage High specific capacitance Outstanding cycle performance

A zero-sum game or an interactive frame?Iron competition between bacteriaand humans ininfectionwar

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Chinese Medical Journal 2022年第16期135卷 1917-1926页

作者： Zhenchao Wu jiqi Shao Jiajia zheng Beibei Liu Zhiyuan Li Ning Shen Department of Pulmonary and Critical Care Medicine Peking University Third HospitalBejing 100191China Center for Infectious Diseases Peking University Third HospitalBejing 100191China Center for Quantitative Biology Academy for Advanced Interdisciplinary StudiesPeking UniversityBeijing 100871China Department of Laboratory Medicine Peking University Third HospitalBejing 100191China.

Iron is an essential trace element for both humans and bacteria.It plays a vital role in life,such as in redox reactions and electron transport.Strict regulatory mechanisms are necessary to maintain iron homeostasis because both excess and insufficient iron are harmful to life.Competition for iron is a war between humans and bacteria.To grow,reproduce,colonize,and successfully cause infection,pathogens have evolved various mechanisms for iron uptake from humans,principally Fe^(3+)-siderophore and Fe^(2+)-heme transport systems.Humans have many innate immune mechanisms that regulate the distribution of iron and inhibit bacterial iron uptake to help resist bacterial invasion and colonization.Meanwhile,researchers have invented detection test strips and coupled antibiotics with siderophores to create tools that take advantage of this battle for iron,to help eliminate pathogens.In this review,we summarize bacterial and human iron metabolism,competition for iron between humans and bacteria,siderophore sensors,antibiotics coupled with siderophores,and related phenomena.We also discuss how competition for iron can be used for diagnosis and treatment of infection inthefuture.

关键词： Infection Iron metabolism Bacteria Siderophore Antibiotic

白内障超声乳化术后视网膜微循环变化特点及影响术后视力因素分析

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国际眼科杂志 2024年第2期24卷 270-276页

作者：郑吉琦冯玉沛王国斌陈剑铭高琛张梅王登廷甘肃省康复中心医院眼科甘肃省兰州市730000

目的:探讨白内障超声乳化术后视网膜微循环变化特点及影响术后视力因素。方法:回顾性分析。选取2022-01/12于我院行超声乳化术的白内障患者264例264眼为研究对象。根据患者术后3mo最佳矫正视力(BCVA)恢复情况分为BCVA≥0.3组198眼,BCVA0... 详细信息

目的:探讨白内障超声乳化术后视网膜微循环变化特点及影响术后视力因素。方法:回顾性分析。选取2022-01/12于我院行超声乳化术的白内障患者264例264眼为研究对象。根据患者术后3mo最佳矫正视力(BCVA)恢复情况分为BCVA≥0.3组198眼,BCVA0.05)。结论:超声乳化术后白内障患者视网膜微循环明显改善。术前EDV、PSV、房水细胞分级、眼底病变分级、高龄、Emery分级均是影响白内障患者术后BCVA恢复不佳的因素。

关键词：白内障超声乳化术视网膜微循环视力影响因素

飞秒激光辅助白内障超声乳化摘除联合人工晶体植入术在高度近视合并白内障中的临床效果研究

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世界复合医学 2023年第11期9卷 156-159页

作者：郑吉琦马瑞生甘肃省康复中心医院眼科甘肃兰州730000 临夏市民族医院眼科甘肃临夏731100

目的分析在高度近视合并白内障患者中使用飞秒激光辅助白内障超声乳化摘除联合人工晶体植入术的具体临床效果。方法方便选取2018年1月—2023年1月甘肃省康复中心医院收治的550例高度近视合并白内障患者作为研究对象,根据不同的手术方法... 详细信息

目的分析在高度近视合并白内障患者中使用飞秒激光辅助白内障超声乳化摘除联合人工晶体植入术的具体临床效果。方法方便选取2018年1月—2023年1月甘肃省康复中心医院收治的550例高度近视合并白内障患者作为研究对象,根据不同的手术方法分为参照组和研究组。参照组(250例,410眼)使用传统超声乳化人工晶体植入术,研究组(300例,510眼)使用飞秒激光辅助白内障超声乳化摘除联合人工晶体植入术。比较两组最佳矫正视力(best corrected visual acuity,BCVA)、不同矫正视力眼数占比、并发症发生情况和术后的生活质量评分。结果术前两组BCVA比较,差异无统计学意义(P>0.05);术后4个月研究组BCVA(0.42±0.06)高于参照组(0.41±0.02),差异有统计学意义(t=2.521,P0.05);术后4个月研究组矫正视力0.5~0.05);术后,研究组中文版视功能指数量表评分低于参照组,差异有统计学意义(P<0.05)。结论高度近视合并白内障患者在临床中使用飞秒激光辅助白内障超声乳化摘除联合人工晶体植入术,能够改善患者BCVA,并发症较少,并能提升患者的视功能生活质量。

关键词：飞秒激光超声乳化人工晶体白内障矫正视力

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宫颈癌筛查的历史与争论研究

中国科技史杂志 2021年第3期42卷 335-344页

作者：唐文佩郑佶祺北京大学医学人文学院

宫颈癌筛查是人类首次就恶性肿瘤开展的大规模筛查,在当下施行的众多肿瘤筛查计划中扮演着模型示范作用。然而自巴氏涂片技术诞生之日起,围绕此筛查的争议就从未停止过。细胞学技术的高难度使得筛查的假阴性率居高不下,流行病学研究质... 详细信息

宫颈癌筛查是人类首次就恶性肿瘤开展的大规模筛查,在当下施行的众多肿瘤筛查计划中扮演着模型示范作用。然而自巴氏涂片技术诞生之日起,围绕此筛查的争议就从未停止过。细胞学技术的高难度使得筛查的假阴性率居高不下,流行病学研究质疑筛查计划不证自明的有效性,HPV疫苗的出现更是极大降低了筛查的基本价值。尽管按照"有效筛查"原则,宫颈癌细胞学技术远非"适宜的试验或检查方法",但作为当今世界上最广泛开展的癌症筛查项目,考察其在不断争议中持续开展的历史,有助于理解新型诊断技术与疾病以及疾病与社会之间的相互塑造过程。

关键词：宫颈癌筛查细胞学技术巴氏涂片 HPV疫苗

基于单元的综合安全项目在外科患者导管安全管理中的应用

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护理学杂志 2023年第7期38卷 50-53页

作者：郑蕾徐颖匡洁严佶祺王芳张世瑜金艳王丽君上海交通大学医学院附属瑞金医院甲状腺血管外科上海200025 上海交通大学医学院附属瑞金医院泌尿外科上海200025 上海交通大学医学院附属瑞金医院护理部上海200025 上海交通大学医学院附属瑞金医院肝胆外科上海200025 上海交通大学医学院附属同仁医院

目的探讨基于单元的综合安全项目在外科患者导管安全管理中的应用效果。方法将外科术后置管患者3825例按时间顺序分为对照组(1861例)和干预组(1964例),分别实施导管常规管理和基于单元的综合安全项目管理。干预组通过组织安全科学培训... 详细信息

目的探讨基于单元的综合安全项目在外科患者导管安全管理中的应用效果。方法将外科术后置管患者3825例按时间顺序分为对照组(1861例)和干预组(1964例),分别实施导管常规管理和基于单元的综合安全项目管理。干预组通过组织安全科学培训、组建团队、通过意义建构识别缺陷及实施团队合作和沟通等方法,分析病区存在的导管安全问题,制订并实施相应导管安全干预措施。结果管理后干预组非计划拔管率显著低于对照组,病区导管质控中导管评估得分显著高于对照组(均P<0.05);护理人员安全文化水平得分较实施前有所提升。结论基于单元的综合安全项目管理,可有效降低非计划拔管率,提升护理人员导管评估意识和导管护理质量。

关键词：手术患者综合安全项目导管非计划拔管导管护理患者安全

基于9E燃气-蒸汽联合循环发电机组的烟气余热利用系统

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燃气轮机技术 2022年第2期35卷 47-50页

作者：唐寅王子睿郑震宗吉琪何朝荣华能南京燃机发电有限公司南京210034

基于燃气-蒸汽联合循环发电机组提出了回收余热锅炉尾部烟气余热对天然气进行加热的方案,提高了系统效率,同时大量回收了水资源,对于燃气-蒸汽联合循环发电系统的优化具有重要参考价值。以某容量为200 MW的9E燃气-蒸汽联合循环发电机组... 详细信息

基于燃气-蒸汽联合循环发电机组提出了回收余热锅炉尾部烟气余热对天然气进行加热的方案,提高了系统效率,同时大量回收了水资源,对于燃气-蒸汽联合循环发电系统的优化具有重要参考价值。以某容量为200 MW的9E燃气-蒸汽联合循环发电机组为例,对应用该方案下的系统流程、参数进行设计,对热经济性及水回收效益进行了计算,并与已有电加热和抽汽加热方案进行对比,结果表明:应用烟气余热回收加热天然气方案可有效回收烟气余热1.3 MW,水回收1.9 t/h,水回收率100%,余热锅炉效率提升0.57%,与电加热方案相比全年可节省453.6万元,与抽汽加热方案相比可节省273.6万元。

关键词：燃气轮机天然气余热利用热经济性分析水回收