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Fe(Ⅱ)金属胶束模拟过氧化氢酶研究

四川大学学报（自然科学版） 1999年第3期36卷 550-555页

作者：程四清孟祥光陈勇谢家庆王茜曾宪诚四川大学化学系自贡师专化学系

应用碘化钾显色和紫外分光光度法，在摩尔比１∶５００的Ｆｅ（Ⅱ）ｔｒｉｅｎ配合物溶液中加入表面活性剂（ＣＴＡＢ、ＳＤＳ、ＬＳＳ、Ｂｒｉｊ３５），形成Ｆｅ（Ⅱ）金属胶束溶液，在２０℃和３０℃下，ｐＨ≈１０，研究Ｆｅ（Ⅱ... 详细信息

应用碘化钾显色和紫外分光光度法，在摩尔比１∶５００的Ｆｅ（Ⅱ）ｔｒｉｅｎ配合物溶液中加入表面活性剂（ＣＴＡＢ、ＳＤＳ、ＬＳＳ、Ｂｒｉｊ３５），形成Ｆｅ（Ⅱ）金属胶束溶液，在２０℃和３０℃下，ｐＨ≈１０，研究Ｆｅ（Ⅱ）金属胶束模拟过氧化氢酶催化过氧化氢分解反应．提出了一种金属胶束催化的数学模型．计算得到三元复合物结合常数Ｋ和金属胶束相中过氧化氢分解速率常数ｋ３．结果表明，阳离子和非离子金属胶束对该反应有催化作用，阴离子和两性离子金属胶束对该反应有禁阻作用．

关键词：金属胶束人工酶模拟过氧化氢酶铁

Multiple gastric adenocarcinoma of fundic gland type: A case report

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World Journal of Clinical Cases 2019年第18期7卷 2871-2878页

作者： Ou chen Ze-yong Shao Xiong Qiu guang-Ping Zhang Department of Gastroenterology Ya’an People’s HospitalYa’an 625000Sichuan ProvinceChina Department of Pathology Ya’an People’s HospitalYa’an 625000Sichuan ProvinceChina 不详

BACKGROUND In recent years, there have been reports of a new histological type of gastric cancer, termed gastric adenocarcinoma of the fundic gland (GA-FG). This disease entity presents differentiation towards the fundic gland, especially chief cellpredominant differentiation (GA-FG-CCP). GA-FG-CCP easily invades into the submucosa but rarely shows metastasis. The reports mostly describe primarily single lesions. Herein, we report a case with multiple lesions, and summarize the clinicopathologic characteristics of multiple cases. CASE SUMMARY A 55-year-old woman underwent upper gastrointestinal endoscopy screening. Two whitish lesions on the anterior wall of the gastric corpus and the gastric fundus were detected. The patient had previously received Helicobacter pylori eradication therapy. The mucosa was characterized as grade C-2 atrophic gastritis. We diagnosed the patient with multiple GA-FG (GA-FG-CCP) by hematoxylin and eosin (HE) staining and immunohistochemical staining of the endoscopic biopsy. Upon performing endoscopic submucosal dissection (ESD), one lesion was not found, but the scar from the biopsy was visible;the mucularis mucosa of the biopsy and ESD-resected specimen were intact. The two lesions showed no lymphatic nor venous invasion. The resection performed appeared to be relatively curative. CONCLUSION Cases of multiple GA-FG-CCP are very rare in clinical practice. Most of its clinicopathologic characteristics are similar to those of a single lesion. Our case provides diagnostic and therapeutic information about GA-FG-CCP with multiple lesions.

关键词： Gastric adenocarcinoma of the fundic gland Multiple lesions Pepsinogen-I Endoscopic submucosal dissection Case report

Segmented Spiral Waves and Anti-phase Synchronization in a Model System with Two Identical Time-Delayed Coupled Layers

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Communications in Theoretical Physics 2008年第1期49卷 174-180页

作者： YUAN Guo-yong YANG Shi-Ping WANG guang-Rui chen Shi-Gang Department of Physics Hebei Normal University Shijiazhuang 0500167 China Institute of Applied Physics and Computational Mathematics P.O. Box 8009 Beijing 100088 China

In this paper, we consider a model system with two identical time-delayed coupled layers. Synchronization and anti-phase synchronization are exhibited in the reactive system without diffusion term. New segmented spiral waves, which are constituted by many thin trips, are found in each layer of two identical time-delayed coupled layers, and are different from the segmented spiral waves in a water-in-oil aerosol sodium bis（2-ethylhexyl） sulfosuccinate （AOT） microemulsion （ME）（BZ-AOT system）, which consists of many small segments. ＂Anti-phase spiral wave synchronization＂ can be realized between the first layer and the second one. For different excitable parameters, we also give the minimum values of the coupling strength to generate segmented spiral waves and the tip orbits of spiral waves in the whole bilayer.

关键词： spiral wave synchronization anti-phase synchronization

Lamellar morphology of directional solidified Ti–45Al–6Nb–xW alloys

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Rare Metals 2016年第1期35卷 65-69页

作者： Zhi-Yuan Hou yong-Sheng Li Hao-Jie Mei Kai Hu guang chen School of Materials Science and Engineering Nanjing University of Science and Technology Engineering Research Center of Materials Behavior and Design Ministry of Education

Directional solidification of Ti-45Al-6Nb-xW（x=0,0.4,0.8;at%） alloys was performed by Bridgeman method with the stable growth rate of 5,10,and 20 μm·s^（-1）.The differential scanning calorimeter（DSC） results indicate that both the eutectic temperature and the transition temperature of α（Ti_3Al） to γ（TiAl） increase with W content increasing from 0 at%to 0.8 at%.For the stable growth rate of 10 μm·s^（-1）,the orientations of α_2（Ti_3Al）/γ（TiAl）lamellae change from 45°（0 at%W） to 0° and near 0°（0.4at%and 0.8 at%W） to the crystal growth direction,and the spacing of α_2/γ lamellae decreases with W content increasing from 0 at%to 0.4 at%,while it increases when W content is 0.8 at%.With the increase in growth rate from5 to 10 and 20 μm·s^（-1）,the lamellar spacing of α_2/γbecomes smaller,and the lamellar thickness becomes more uniform.

关键词： Ti-Al-Nb--W alloy Directionalsolidification Lamellar morphology Lamellar spacing

Recent progress on photoactive nonprecious transition-metal complexes

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Science China Chemistry 2025年第1期 46-95页

作者： Zhong-Liang Gong Hong-Jie Zhang Yan cheng Jianxun Liu Yuhan Ai Yaqin Li Zhihui Feng Qiong Zhang Shaolong Gong yong chen Chang-Jiang Yao Yuan-Yuan Zhu Liang-Jin Xu Yu-Wu Zhong CAS Key Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences State Key Laboratory of Structural Cemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences School of Chemistry and Chemical Engineering Anhui Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei University of Technology State Key Laboratory of Explosion Science and Safety Protection School of Mechatronical Engineering Beijing Institute of Technology College of Chemistry and Molecular Sciences Hubei Key Lab on Organic and Polymeric Optoelectronic Materials Wuhan University School of Chemistry and Chemical Engineering Anhui University Key Laboratory of Photochemical Conversion and Optoelectronic Materials & CAS-HKU Joint Laboratory on New Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences

Photoactive complexes of nonprecious transition metals, mainly including those in the first-row and partially the second-row of the Periodic table of elements, have received increasing attention in view of their low cost and long-term sustainability. They are recognized as promising alternatives to noble transition metal complex congeners that have been extensively studied in optoelectronic devices, artificial photosynthesis, photocatalysis, biodiagnostics, and therapeutics, etc. This review is devoted to a comprehensive summary on the classical and recent advances on photoactive nonprecious transition metal complexes, including photoactive Zr, V, Cr, Mo, and W complexes, Mn complexes and hybrids, Fe, Co, Ni, and Cu complexes, and Zn and Cd complexes and hybrids. A particular focus is given on the molecular design, modulation of photophysical and photochemical properties, and applications of the representative and lately-developed nonprecious metal complexes. In addition, a perspective on the future development in this field is provided at the end of this review.

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Experimental study on Ti+Nb bearing ultra-low carbon bake hardening sheet steel hot-rolled in the ferrite region

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International Journal of Minerals,Metallurgy and Materials 2009年第5期16卷 540-548页

作者： Ji-ping chen yong-lin Kang Ying-min Hao guang-ming Liu Ai-ming Xiong School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China The State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China Steel Research Institute of Shougang Beijing 100041 China

A Ti＋Nb bearing ultra-low carbon bake hardening sheet steel hot-rolled in the conventional austenite region and in the ferrite region with lubrication was experimentally studied. Subsequent cold rolling and continuous annealing processes were also conducted. The results show that microstructures of ultra-low carbon bake hardening hot strips at room temperature are basically irregular polygonal ferrites. The yield strength, ultimate tensile strength, n value, and r value of the No.2 specimen hot-rolled in the ferrite region with lubrication are 243 MPa, 364 MPa, 0.29, and 1.74, respectively, which are similar to those of the No.1 specimen hot-roiled in the conventional austenite region. The elongation rate and bake hardening value of No.2 specimen are 51% and 49.4 MPa, respectively, which are greater than those of No. 1 specimen. The No.2 specimen hot-rolled in the ferrite region with lubrication exhibits good mechanical properties and relatively excellent baking hardening performance. Therefore, the hot rolling experiment of Ti＋Nb bearing ultra-low carbon bake hardening steel in the ferrite region with lubrication is feasible and can be considered in the future industrial trial production.

关键词： ultra low carbon steel bake hardening texture microstructure mechanical properties

Nitric Oxide Content in Wheat Leaves and Its Relation to Programmed Cell Death of Main Stem and Tillers Under Different Nitrogen Levels

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Journal of Integrative Agriculture 2013年第2期12卷 239-250页

作者： GUO Jun-xiang chen Er-ying YIN Yan-ping WANG Ping LI yong chen Xiao-guang WU guang-lei WANG Zhen-lin National Key Laboratory of Crop Biology Agronomy College Shandong Agricultural University Xuzhou Sweetpotato Research Center/Sweetpotato Research Institute Chinese Academy of Agricultural Sciences

Nitric oxide （NO） is a key signaling molecule in different physiological processes of plants, including programmed cell death （PCD）. PCD of tillers plays an important role in surviving which are major components of grain yield. PCD was triggered in wheat leaves of main stem and tillers by NO content under different nitrogen treatments. In wheat, NO could be synthesized endogenously by nitrate reductase （NR）. As an inducible enzyme, NR activity was closely related to substrate concentration. Therefore, different nitrogen levels would change NR activity and NO production. The objective of this study was to determine the effects of NR activity, NO production, and the correlation between them on different tillers growth, development, senescence, and kernel protein content under different nitrogen levels. Field-experiments were conducted in 2009-2011 growing seasons, using two wheat cultivars with different spike-types. Results showed that for main stem and primary tillers, NR activity and NO content reached high level at heading stage, while for secondary tiller, the level of NR activity was low, but NO content was high in the present research. The NO synthesis depending on NR activity in wheat leaves was significant in the early growing stage, but the NO synthesis weakened with the progress of growing period. NO was related to the senescence of wheat leaves, but PCD was more sensitive to marked changes of NO content than NO content itself. N application had marked influence on the aging process of primary tiller, while had little influence on that of main stem and secondary tiller. Moreover, N fertilizer application could increase spike rate and protein content of primary tiller by N fertilizer application.

关键词： wheat nitric oxide programmed cell death tiller

Abrasion test of flexible protective materials on hydraulic structures

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Water Science and Engineering 2014年第1期7卷 106-116页

作者： Xin WANG Shao-ze LUO guang-sheng LIU Lu-chen ZHANG yong WANG State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing Hydraulic Research Institute Beijing Oriental Yuhong Waterproof Technology Co. Ltd.

In this study, several kinds of flexible protective materials sprayed with polyurea elastomers （hereinafter referred to as polyurea elastomer protective material） were adopted to meet the abrasion resistance requirement of hydraulic structures, and their abrasion resistances against the water flow with suspended load or bed load were studied systematically through tests. Natural basalt stones were adopted as the abrasive for simulation of the abrasion effect of the water flow with bed load, and test results indicate that the basalt stone is suitable for use in the abrasion resistance test of the flexible protective material. The wear process of the polyurea elastomer protective material is stable, and the wear loss is linear with the time of abrasion. If the wear thickness is regarded as the abrasion resistance evaluation factor, the abrasion resistance of the 351 pure polyurea is about twice those of pure polyurea with a high level of hardness and aliphatic polyurea, and over five times that of high-performance abrasion-resistant concrete under the abrasion of the water flow with suspended load. It is also about 50 times that of high-performance abrasion-resistant concrete under the abrasion of the water flow with bed load. Overall, the abrasion resistance of pure polyurea presented a decreasing trend with increasing hardness. Pure polyurea with a Shore hardness of D30 has the best abrasion resistance, which is 60 to 70 times that of high-performance abrasion-resistant concrete under the abrasion of the water flow with bed load, and has been recommended, among the five kinds of pure polyurea materials with different hardness, in anti-abrasion protection of hydraulic structures.

关键词： flexible protective material polyurea elastomer material abrasion resistance hardness influence hydraulic structure

Impact of Cross-Phase Modulation Induced by Classical Channels on the CV-QKD in a Hybrid System

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Chinese Physics Letters 2013年第11期30卷 14-17页

作者： chen Yan SHEN yong TANG guang-Zhao ZOU Hong-Xin Department of Physics National University of Defense TechnologyChangsha 410073

We calculate the magnitude of cross phase modulation(XPM)induced by classical channels,and analyze its impact on quantum secure key *** results show that the XPM induced by classical signals is small and its impact on... 详细信息

关键词： quantum Impact neglected