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Lung ultrasound score evaluation of the effect of pressure-controlled ventilation volume-guaranteed on patients undergoing laparoscopicassisted radical gastrectomy

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World Journal of Gastrointestinal Surgery 2024年第6期16卷 1717-1725页

作者： Jian Tan cheng-Ming Bao xiao-yuan chen Department of Critical Care Medicine Lishui District People's HospitalNanjing 211200Jiangsu ProvinceChina Department of Ultrasound Medicine Lishui District People's HospitalNanjing 211200Jiangsu ProvinceChina

BACKGROUND Laparoscopic-assisted radical gastrectomy(LARG)is the standard treatment for early-stage gastric carcinoma(GC).However,the negative impact of this proce-dure on respiratory function requires the optimized intraoperative management of patients in terms of *** To investigate the influence of pressure-controlled ventilation volume-guaranteed(PCV-VG)and volume-controlled ventilation(VCV)on blood gas analysis and pulmonary ventilation in patients undergoing LARG for GC based on the lung ultrasound score(LUS).METHODS The study included 103 patients with GC undergoing LARG from May 2020 to May 2023,with 52 cases undergoing PCV-VG(research group)and 51 cases undergoing VCV(control group).LUS were recorded at the time of entering the operating room(T0),20 minutes after anesthesia with endotracheal intubation(T1),30 minutes after artificial pneumoperitoneum(PP)establishment(T2),and 15 minutes after endotracheal tube removal(T5).For blood gas analysis,arterial partial pressure of oxygen(PaO_(2))and partial pressure of carbon dioxide(PaCO_(2))were *** airway pressure(P_(peak)),plateau pressure(Pplat),mean airway pressure(P_(mean)),and dynamic pulmonary compliance(C_(dyn))were recorded at T1 and T2,1 hour after PP establishment(T3),and at the end of the operation(T4).Postoperative pulmonary complications(PPCs)were ***-and postoperative serum interleukin(IL)-1β,IL-6,and tumor necrosis factor-α(TNF-α)were measured by enzyme-linked immunosorbent *** Compared with those at T0,the whole,anterior,lateral,posterior,upper,lower,left,and right lung LUS of the research group were significantly reduced at T1,T2,and T5;in the control group,the LUS of the whole and partial lung regions(posterior,lower,and right lung)decreased significantly at T2,while at T5,the LUS of the whole and some regions(lateral,lower,and left lung)increased *** comparison with the control group,the whole and regional LUS of the research group were reduc

关键词： Lung ultrasound score Pressure-controlled ventilation volume-guaranteed Laparoscopic-assisted radical gastrectomy Blood gas analysis indexes Pulmonary ventilation

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周环取代基对酞菁在不同基质中光谱性能的影响

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光谱学与光谱分析 2024年第10期44卷 2953-2958页

作者：秦静王可栋胡雪芳陈肖媛刘超青岛黄海学院智能制造学院车辆工程系山东青岛266555

将不同周环取代基的金属酞菁均采用溶胶-凝胶(Sol-gel)工艺法掺入二氧化硅(SiO2)凝胶玻璃基质中,制备了金属酞菁掺杂的复合凝胶玻璃。系统研究了酞菁铅系列、酞菁铝系列和酞菁锌系列中不同周环取代基种类和位置对酞菁在N,N-二甲基酰胺(D... 详细信息

将不同周环取代基的金属酞菁均采用溶胶-凝胶(Sol-gel)工艺法掺入二氧化硅(SiO2)凝胶玻璃基质中,制备了金属酞菁掺杂的复合凝胶玻璃。系统研究了酞菁铅系列、酞菁铝系列和酞菁锌系列中不同周环取代基种类和位置对酞菁在N,N-二甲基酰胺(DMF)溶液和二氧化硅凝胶玻璃基质中的紫外-可见吸收光谱的影响,以检测不同周环取代基的种类和位置对酞菁在不同基质中的存在状态及其影响因素。首先研究了周环取代基种类的影响:在DMF溶液中,不同周环取代基-CP、-OAr、 t-Bu的引入,均可使大环π电子形成更大的共轭体系,使最大电子吸收波长产生红移;在复合凝胶玻璃中,掺杂金属酞菁以多聚物的形式存在,使其紫外-可见光谱中的特征吸收峰均变得弥散;研究了周环取代基位置的影响:对酞菁铝系列研究了周环取代基-OAr分别在α和β位时,α-AlTPOPcCl和β-AlTPOPcCl在DMF溶液和二氧化硅复合凝胶玻璃中的紫外-可见吸收光谱,结果表明:在DMF溶液中,由于电子共轭效应,α位的取代基相比β位其特征峰有所红移;在复合凝胶玻璃中,α-AlTPOPcCl的紫外-可见吸收光谱与其在DMF溶液中几乎相同,说明α-AlTPOPcCl在这两种基质中以单体形式存在,而β-AlTPOPcCl在复合凝胶体系中吸收光谱峰型弥散,说明该酞菁在复合体系中多以团聚体形式存在。研究结果为进一步研究酞菁掺杂复合凝胶玻璃的光学性能奠定了基础,为非线性光限幅性能材料及器具的研究奠定了理论基础。

关键词：酞菁复合凝胶玻璃紫外-可见吸收光谱

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Smash product algebras over twisted dimodule algebras

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Applied Mathematics(A Journal of Chinese Universities) 2008年第3期23卷 366-370页

作者： chen xiao-yuan Zhejiang Vocational College of Commerce Hangzhou 310053 China

Results of the research for smash product algebras over dimodule algebras are generalized to the more general twisted dimodule algebras.

关键词： Hopf algebra twisted dimodule algebra

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探针结构对Ti/CuO微波点火延迟时间的影响

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火炸药学报 2024年第5期47卷 468-474,I0006页

作者：唐魁赵团唐振华陈小远程用泷陈苏杭沈瑞琪徐抗震西北大学化工学院/西安市特种能源材料重点实验室陕西西安710069 陕西应用物理化学研究所陕西西安710061 南京理工大学化学化工学院/微纳含能器件工业和信息化部重点实验室江苏南京210094

为了研究探针结构对微波点火性能的影响,使用4种探针对Ti/CuO点火药的微波点火延迟时间进行了测试,并通过模拟对探针结构进行优化,获得了探针参数(长度、包覆层厚度、尖端锥度和镀层厚度)对电场强度的影响规律。结果表明,探针针尖处的... 详细信息

为了研究探针结构对微波点火性能的影响,使用4种探针对Ti/CuO点火药的微波点火延迟时间进行了测试,并通过模拟对探针结构进行优化,获得了探针参数(长度、包覆层厚度、尖端锥度和镀层厚度)对电场强度的影响规律。结果表明,探针针尖处的电场强度显著影响点火延迟时间,在2.45 GHz、50 W微波作用下,探针1、2、3、4最大电场分别为1800、190、34和53 kV/m,Ti/CuO的点火延迟时间分别为222.6、660.5、949.1和921.3 ms;在2.45 GHz、1 W微波作用下,当探针长度为26 mm、PTFE包覆层长度为8 mm、厚度为0.75 mm、针尖锥度为0.243和金镀层厚度为5μm时,能够将电场强度从原来的约10 kV/m提升到约1000 kV/m,并且电场分布集中于尖端。

关键词：微波点火探针点火药点火延迟时间电场强度点火器件

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A New Approach to 2,3-Dihydro-1H-1,5-Benzodiazepines from the Reaction of o-Nitrophenylazide with α,β-Unsaturated Ketones Promoted by Samarium Diiodide

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Chinese Chemical Letters 2001年第1期12卷 5-6页

作者： xiao yuan chen Wei Hui ZHONG Yong Min ZHANG Department of Chemistry Zhejiang University at Xixi CampusHangzhou 310028 Laboratory of Organometallic Chemistry Chinese Academy of SciencesShanghai 200032 Department of Chemistry Hunan Jishou UniversityJishou416000

o-Nitrophenylazide was reduced by SmI2 in anhydrous THF at room temperature to produce active intermediate 2 (samarium amide), "living" double-anion in situ which reacted smoothly with α，β-unsaturated ketones to af... 详细信息

关键词： Samarium diiodide reduction nitro group azide 2 3-dihydro-1H-1 5-benzodiazepine.

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The Equilibrium and Growth Stability of Winter Wheat Root and Shoot Under Different Soil Water Conditions

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Agricultural Sciences in China 2007年第5期6卷 597-606页

作者： GAO Zhi-hong chen xiao-yuan LUO yuan-pei Yingdong College of Bioengineering Shaoguan University Shaoguan 512005 P.R.China Institute of Agro-Environment and Sustainable Development Chinese Academy of Agricultural Sciences Beijing 100081 P.R.China

The equilibrium between root, shoot and growth stability under different soil water conditions were investigated in a tube experiment of winter wheat. The water supplying treatments included： sufficient irrigation at whole growth phase, moderate deficiency irrigation at whole growth phase, serious deficiency irrigation at whole growth phase, sufficient irrigation at jointing stage, tillering stage, flowering stage, and fillering respectively, after moderate and serious water deficit during their previous growth stage. Root and shoot biomass were measured. On the basis of the cooperative root-shoot interactions model, the equilibrium and growth stability were studied on the strength of the kinetics system theory. There was only one varying equilibrium point between the root and shoot over the life time of the winter wheat plant. Water stress prolonged the duration of stable growth, the more serious the water deficit, the longer the period of stable growth. The duration of stable growth was shortened and that of unstable growth was prolonged after water recovery. The growth behavior of the plants exposed to moderate water deficit shifted from stable to unstable until the end of the growth, after rewatering at flowering. In the life-time of the crop, the root and shoot had been adjusting themselves in structure and function so as to maintain an equilibrium, but could not achieve the equilibrium state for long. They were always in an unbalanced state from the beginning to the end of growth. This was the essence of root-shoot equilibrium. Water stress inhibited the function of root and shoot, reduced root shoot interactions, and as a result, the plant growth gradually tended to stabilize. Rewatering enhanced root shoot interactions, prolonged duration of instable growth. Rewatering at flowering could upset the inherent relativity during the long time of stable growth from flowering to filling stage, thus leading to unstable growth and enhanced dry matter accumulating rat

关键词： winter wheat root and shoot equilibrium growth stability soil moisture

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快速康复外科在腰椎间盘突出中的应用研究

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四川生理科学杂志 2024年第7期46卷 1461-1463页

作者：刘传云洪太阳陈小原于都县第二人民医院骨科江西赣州432300

目的:探究快速康复外科对腰椎间盘突出(LDH)患者的影响。方法:采用随机数字表法将于都县第二人民医院自2022年7月2023年7月收治的67例行手术治疗的LDH患者分为A组(常规干预)和B组(早期快速康复干预),各33例,比较两组患者腰椎功能主观症... 详细信息

目的:探究快速康复外科对腰椎间盘突出(LDH)患者的影响。方法:采用随机数字表法将于都县第二人民医院自2022年7月2023年7月收治的67例行手术治疗的LDH患者分为A组(常规干预)和B组(早期快速康复干预),各33例,比较两组患者腰椎功能主观症状、客观症状评分、腰椎活动度。结果:术后1 w、术后3 m后,A组腰背功能主观症状评分、客观症状评分、腰椎活动度均显著高于B组(P<0.05)。结论:对LDH手术患者术后早期进行快速康复锻炼,能有效改善患者临床症状和腰椎活动度,促进术后康复。

关键词：腰椎间盘突出快速康复外科腰背功能

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Anion Adsorption on an Au Colloid Monolayer Based Cysteamine-Modified Gold Electrode

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Chemical Research in Chinese Universities 2001年第2期17卷 159-167页

作者： HU xiao-ya, xiao Yi and chen Hong-yuan (Department of Chemistry, The State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, P. R. China) 南京大学配位化学国家重点实验室江苏南京 210093

Anion adsorption behavior on Au colloid surface was investigated in virture of depositing monolayers of Au colloid on the self-assembled monolayers of cysteamine on a gold electrode. Po- tential-dependent anion adsorption-desorption waves via the nonfaradaic current were obtained by means of cyclic voltammetry at Au coltoid-modified gold electrodes in the potential range of -2 00-600 mV. The adsorption sequence in the order of adsorption peak potentials (Epa) is OH- >citrate3 ->H2PO4- >Cl->SO42->ClO4->NO3-. Among them, citrate3- exhibited an en- tirely irreversible adsorption. A rise in temperature can increase the rates of adsorption-desorp- tion and improve the reversibility of the adsorption-desorption of Cl-, SO42-, ClO4-, NO3- and H2PO-4. The adsorption peak potentials shifted more negatively for Ca. 63 mV as the anion con- centrations were increased by a decade factor. The change of pH from 7 to 1 slightly affected the adsorption peak potentials of Cl- and NO3-. Au colloids with a smaller size (16 nm) gave rise to a better reversibility of the adsorption-desorption process and lower adsorption currents. The ex- perimental results of citrate ions adsorption on Au colloid surface show that Au colloids with a smaller size prepared by sodium citrate method exhibited a higher stability in the solution in com- parison to those with larger sizes because of its higher ratio of charge/mass. In other words, the smaller gold nanoparticles are covered with citrate ions monolayer that can also be formed at larg- er gold nanoparticles by means of electrochemical scan.

关键词： Colloidal gold Self-assembled monolayer Gold electrode Electrode dynamics

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A New One-dimensional Zigzag Chain [Zn(1,5-NDC)(2,2′-bipy)]_n Obtained from Hydrothermal Reaction

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Chinese Journal of Structural Chemistry 2006年第11期25卷 1293-1296页

作者： MENG Ze-Rong HE Xiang WU xiao-yuan chen Li-Juan YANG Wen-Bin LU Can-Zhong State Key Laboratory of Structural Chemistry Fujian Institute of Research on theStructure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

The title compound, [Zn（NDC）（2,2＇-bipy）], （NDC = 1,5-naphthalenedicarboxylate, 2,2＇- bipy = 2,2＇-bipyridine）, has been synthesized by a hydrothermal reaction and characterized by single-crystal X-ray diffraction analysis. It crystallizes in monoclinic, space group C2/c with a = 19.967（4）, b = 17.158（3）, c = 14.276（3） A,β = 129.623（5）°, V = 3767.4（12） A^3, Z = 8, C22H14N2O4Zn, Mr = 435.72, Dc= 1.536 g/cm^3, F（000） = 1776, μ（MoKα） = 1.336 mm^-1, the final R = 0.0777 and wR = 0.2447 for 2032 observed reflections （I 〉 26（/））. The Zn（II） ion is six-coordinated by two nitrogen and four oxygen atoms in a distorted octahedral environment. NDC ligand has a bis（bridging bidentate） coordination mode in the compound, The zinc atoms are linked by carboxylate groups of NDC ligand in bridging mode into a one-dimensional zigzag chain.

关键词： 1,5-NDC zinc coordination polymer crystal structure

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A Stable Copper-based Metal-Azolate Framework for Efficient Electroreduction of CO_(2)to C_(2+)Products

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Chemical Research in Chinese Universities 2024年第4期40卷 664-669页

作者： LIU yuan-yuan ZHU Hao-Lin LIAO Pei-Qin chen xiao-Ming Key Laboratory of Bioinorganic and Synthetic Chemistry Ministry of EducationGBRCE for Functional Molecular EngineeringSchool of ChemistryIGCMESun Yat-sen UniversityGuangzhou510275P.R.China Chemistry and Chemical Engineering Guangdong Laboratory Shantou515031P.R.China

Driven by renewable or excess electrical energy,electrochemical CO_(2)reduction reaction(eCO_(2)RR)represents a promising carbon-neutral approach to generating valuable low-carbon fuels by consuming CO_(2)and H_(2)O.C_(2+)products are one of the most economically valuable products among the reduction species of eCO_(2)RR,but there are still some challenges,such as low selectivity or low current *** this work,we showed that a copper-based metal-azolate framework(MAF),denoted as MAF-203,exhibits the high performance of eCO_(2)RR to yield C_(2+)products with the Faradaic efficiency(C_(2+))of 52.5%and a current density of 660 mA/cm^(2)at-1.2 V *** in a flow cell device under alkaline *** experiment,in situ infrared spectroscopy and the density functional theory(DFT)calculations showed that the electron donating effect of methyl substituents on organic ligands of the copper-based MAF could enhance the ligand field and activation of key intermediates(*CO and*CHO species),thus promoting the coupling of*CO and*CHO for yielding C_(2+)products.

关键词： Metal-organic framework Carbon dioxide Electroreduction C_(2+)product Metal-azolate framework

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