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Synthesis and Spectrophotometric Studies of 2-(1,3,4-Triazolylazo)-5-Diethylamino Phenol and 2-(5-Carboxy-1,3,4-Triazolylazo)-5-Diethylamino Phenol

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Chinese Chemical Letters 1999年第4期10卷 277-280页

作者： fu you PAN Hua Ding LIANG Chang Hua GE(Department of Chemistry, Taizhou Teachers College, 317000 Zhejiang) Taizhou Teachers Coll Dept Chem Zhejiang 317000 Peoples R China

In this paper, 2-(1, 3, 4-triazolylazo)-5-diethylamino phenol (TZAPN) and 2-(5-carboxy-1, 3, 4-triazolylazo)-5-diethylamino phenol (CTZAPN) were prepared, the protonation behaviour and the condition of spectrophotometric determination of cobalt with the reagents are reported. The results show that the new colour reagents react with cobalt to form a stable purple red complex (1:3). However, the complex formed could be changed into another species of stable absorptivity by addition of mineral acid (1+1). The method is highly selective and sensitive and has been applied to the direct determination of cobalt in some alloys with satisfactory results.

关键词： synthesis triazolylazo reagent spectrophotometry cobalt

Preparation and Application of Polymerized High Internal Phase Emulsion Monoliths for the Preconcentration and Determination of Malachite Green and Leucomalachite Green in Water Samples

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Journal of Analysis and Testing 2020年第4期4卷 264-272页

作者： Li-Ping Jiang Na Li Lin-Qi Liu Xian Zheng fu-you Du Gui-Hua Ruan Guangxi Key Laboratory of Electrochemical and Magnetochemical functional Materials College of Chemistry and BioengineeringGuilin University of TechnologyGuilin 541004China College of Biological and Environmental Engineering Changsha UniversityChangsha 410022China

Polymerized high internal phase emulsion(polyHIPE)monoliths were prepared and applied as adsorbent materials for solid-phase extraction(SPE)of malachite green(MG)and leucomalachite green(LMG)from water *** polyHIPE monoliths were prepared by post-functionalization of monolithic surface with 6-aminocaproic acid(ACA)via ring opening reaction of epoxy groups in glycidyl methacrylate(GMA)-based polyHIPEs,and then applied to the preconcentration and determination of trace MG and LMG in environmental water samples by combing with high-performance liquid chromatog-raphy(HPLC).Taking MG and LMG as targets,main factors affecting SPE performance of the polyHIPE monoliths were *** the optimized conditions,the ACA-functionalized polyHIPE monoliths could effectively preconcentrate MG and LMG from 150 mL of water samples,and the recoveries of MG and LMG at three spiked levels were ranged from 84.8 to 97.4%with the relative standard deviations(RSDs)lower than 6%.The proposed method exhibited good linearity in the range of 2-200 ng mL^(-1),with low limits of detection of 17.0 and 8.7 pg mL^(-1)for MG and LMG,*** addi-tion,the prepared ACA-modified polyHIPE monolith showed good durability and stability,and it could be reused for 200 cycles without obvious losing the extraction performance.

关键词： High internal phase emulsion Solid-phase extraction High-performance liquid chromatography Malachite green Leucomalachite green

Microstructural Evolution and Mechanical Properties of AZ31 Magnesium Alloy Prepared by Casting-solid Extrusion Forging During Partial Remelting

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Defence Technology（防务技术） 2013年第3期9卷 146-152页

作者： Jian-quan TAO Yan-ping ZHANG fu-you FAN Qiang CHEN No.59 Institute of China Ordnance Industry Research Development Center of Changsha Electromechanical Products

The casting-solid extrusion forging plus semi-solid partial remelting route is used to improve the properties of AZ31 magnesium alloy *** effect of remelting temperature and holding time on the microstructure of AZ31 magnesium alloy is ***,the properties of AZ31 magnesium alloy components produced by the casting-solid *** forging plus partial remelting route are *** results show that the AZ31 components have very good smooth surface and are formed *** increases in holding time and remelting temperature result in the formation of spheroidal grains surrounded by liquid *** best combination of properties of thixoforged alloy is290 MPa of tensile strength,220 MPa of yield strength and 10%of percentage elongation.

关键词： AZ31镁合金组织性能部分重熔锻造挤压固态组织演变铸件

Study on gas monitoring technology based on information fusion

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Journal of Coal Science & Engineering(China) 2010年第1期16卷 57-63页

作者： HOU you-fu MENG Qing-rui TONG Min-ming LIANG Tao School of Mechanical and Electrical Engineering China University of Mining and Technology Xuzhou 221008 China School of Information and Electrical Engineering China University of Mining and Technology Xuzhou 221008 China

In view of the deficiency of current gas monitoring systems in coal mine roadwayexcavation, a two-level information fusion technology, which adopted the adaptiveweighted algorithm and the BP neural network technology, was applied to gas *** results show that the adaptive weighted algorithm can realize self-regulation by decreasingthe weight value of the failed sensor automatically, so as to eliminate the effect ofthe failed sensor and ensure the effectiveness and accuracy of the gas monitoring *** BP neural network can not only effectively predict the gas gush quantity of the excavationroadway, but also accurately calculate the gas concentration in the region whereone or more sensors have failed, so as to provide the basis for judging the safety status ofthe roadway *** experiments prove the superiority and feasibility of the applicationof information fusion in gas monitoring.

关键词： information fusion gas monitoring adaptive weighted algorithm BP neura network

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动态八叉树在复杂场景设计中的应用

系统仿真学报 2006年第z2期18卷 408-410页

作者：傅由甲重庆工学院计算机科学与工程学院重庆400050

主要介绍一种适合管理复杂三维场景的面向对象动态八叉树。方法利用对象间的空间位置关系,将八叉树、AABB树与面向对象概念相结合,构成一种能根据动态场景快速更新的面向对象动态八叉树。该树叶节点是带有AABB层次树的物体对象,场景设... 详细信息

主要介绍一种适合管理复杂三维场景的面向对象动态八叉树。方法利用对象间的空间位置关系,将八叉树、AABB树与面向对象概念相结合,构成一种能根据动态场景快速更新的面向对象动态八叉树。该树叶节点是带有AABB层次树的物体对象,场景设计时通过八叉树、AABB树、三角面族这种从宏观到微观的搜索方式快速确定要编辑的对象及其部位,有效避免了对场景中所有物体的遍历,提高了场景设计效率。

关键词：动态场景场景管理动态八叉树摄影机裁剪

Increased CD4^+CD45RA^-FoxP3^(low) cells alter the balance between Treg and Th17 cells in colitis mice

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World Journal of Gastroenterology 2016年第42期22卷 9356-9367页

作者： Ya-Hui Ma Jie Zhang Xue Chen you-fu Xie Yan-Hua Pang Xin-Juan Liu Department of Gastroenterology Beijing Anzhen Hospital Capital Medical University Department of Gastroenterology Beijing Chaoyang Hospital Capital Medical University

AIM To investigate the role of regulatory T cell(Treg) subsets in the balance between Treg and T helper 17(Th17) cells in various tissues from mice with dextran sulfate sodium-induced *** T r e g c e l l s, T r e g c e l l s u b s e t s, T h 1 7 c e l l s, a n d CD4+CD25+FoxP 3+IL-17+ cells from the lamina propria of colon(LPC) and other ulcerative colitis(UC) mouse tissues were evaluated by flow cytometry. Forkhead box protein 3(FoxP 3), interleukin 17A(IL-17A), and RORC m RNA levels were assessed by real-time PCR, while interleukin-10(IL-10) and IL-17 A levels were detected with a Cytometric Beads *** In peripheral blood monocytes(PBMC), mesenteric lymphnode(MLN), lamina propria of jejunum(LPJ) and LPC from UC mice, Treg cell numbers were increased(P < 0.05), and FoxP 3 and IL-10 mR NA levels were decreased. Th17 cell numbers were also increased in PBMC and LPC, as were IL-17 A levels in PBMC, LPJ, and serum. The number of FrI subset cells(CD4+CD45RA+FoxP 3low) was increased in the spleen, MLN, LPJ, and LPC. FrI I subset cells(CD4+CD45RA-Fox P3high) were decreased among PBMC, MLN, LPJ, and LPC, but the number of Fr III cells(CD4+CD45RA-FoxP 3low) and CD4+CD25+FoxP 3+IL-17A+ cells was increased. Fox P3 m RNA levels in CD4+CD45RA-Fox P3 low cells decreased in PBMC, MLN, LPJ, and LPC in UC mice, while IL-17 A and RORC mR NA increased. In UC mice the distribution of Treg, Th17 cells, CD4+CD45RA-FoxP 3high, and CD4+CD45RA-FoxP 3low cells was higher in LPC relative to other *** Increased numbers of CD4+CD45RA-FoxP 3low cells may cause an imbalance between Treg and Th17 cells that is mainly localized to the LPC rather than secondary lymphoid tissues.

关键词： Ulcerative colitis Regulatory T cells Treg cells subsets T helper 17 cells

The differences of electrochemical performance between the purchased lead carbonate and the prepared lead carbonate

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电池工业 2005年第4期10卷 212-216页

作者： BAO you-fu Zhejiang Narada Power Source Co. Ltd. Hangzhou Zhejiang 310013 China

The differences of electrochemistry performance between the purchased lead carbonate and the prepared lead carbonate were studied by the methods of cycle voltammogram, electrochemical impedance spectroscope (EIS), constant current discharge, thermal gravimetric analysis, and scan electron microscope (SEM) etc. in the paper. It was showed that the reacting activity of the prepared lead carbonate was higher than that of the purchased lead carbonate. And several points of view were concluded as follows. (1) The prepared lead carbonate contains chemical structure water, but the purchased lead carbonate doesn’t contain chemical structure water. (2) The main chemical substance in the purchased lead carbonate powder is PbCO3, while the one in the prepared lead carbonate powder is 2PbCO3·Pb(OH)2. (3) The particle size of the prepared lead carbonate is smaller than that of the pur- chased lead carbonate.

关键词：电池生产原料碳酸盐化学特性电阻

Effects of polyol excipient stability during storage and use on the quality of biopharmaceutical formulations

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Journal of Pharmaceutical Analysis 2022年第5期12卷 774-782页

作者： Min-Fei Sun Jia-Ning Liao Zhen-Yi Jing Han Gao Bin-Bin Shen you-fu Xu Wei-Jie Fang Institute of Drug Metabolism and Pharmaceutical Analysis College of Pharmaceutical SciencesZhejiang UniversityHangzhou310058China Hangzhou Institute of Innovative Medicine Zhejiang UniversityHangzhou Biopharm TownHangzhou310016China Zhejiang Haisheng Pharmaceutical Inc. TaizhouZhejiang318000China

Biopharmaceuticals are formulated using a variety of excipients to maintain their storage ***,some excipients are prone to degradation during repeated use and/or improper storage,and the impurities generated by their degradation are easily overlooked by end users and are usually not strictly monitored,affecting the stability of *** this study,we evaluated the degradation profile of polyol excipient glycerol during repeated use and improper storage and identified an unprecedented cyclic ketal impurity using gas chromatography with mass spectrometry(GC-MS).The other polyol excipient,mannitol,was much more stable than *** effects of degraded glycerol and mannitol on the stability of the model biopharmaceutical pentapeptide,thymopentin,were also *** thymopentin content was only 66.4% in the thymopentin formulations with degraded glycerol,compared to 95.8% in other formulations after the stress *** glycerol impurities(i.e.,aldehydes and ketones)reacted with thymopentin,affecting the stability of thymopentin *** conclusion,this work suggests that more attention should be paid to the quality changes of excipients during repeated use and *** testing of excipient stability under real or accelerated conditions by manufacturers would help avoid unexpected and painful results.

关键词： Excipient stability GC-MS Glycerol LC-MS/MS Mannitol Thymopentin

Effect of the Resistance Exercise on Elementary School Students’Physical Fitness

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Journal of Science in Sport and Exercise 2019年第2期1卷 184-191页

作者： you fu Ryan D.Burns Nora Constantino Jim Fitzsimmons Peng Zhang School of Community Health Sciences University of NevadaReno1664 N.Virginia StreetRenoNV 89557USA Department of Health Kinesiologyand RecreationCollege of HealthUniversity of UtahSalt Lake CityUT 84112USA Fitness and Recreational Sports University of NevadaReno1664 N.Virginia StreetRenoNV 89557USA Department of Physical Education Teacher Education East Stroudsburg University200 Prospect StreetEast StroudsburgPA 18301USA

Background Physical activity programs using components of resistance have the potential to improve health in school *** purpose of this study was to examine the effect of a school-based resistance exercise program on physical fitness in elementary school *** The sample was 256 children(mean age=8.3±2.5 years;119 girls)from kindergarten to 5th *** performed a 10-min resistance exercise 2-3 times in each school *** fitness outcomes were assessed using President’s Physical Fitness Challenge *** were collected at baseline and at a 6-month post-test time point.A 2×2 doubly MANOVA was employed to examine the effect of sex and *** The multivariate model was statistically significant with a main time effect(Wilks’λ=0.19,F=290.9,P<0.001).Follow-univariate tests found significant differences between time-points on flex arm hang(P=0.033),shuttle run(P<0.001),and 1-mile run/walk times(P<0.001).Conclusions A 6-month resistance exercise program improved upper body strength and cardiorespiratory endurance in elementary school aged *** use of resistance exercise intervention during school day can be effectively used to promote physical fitness and ultimately improve the health of children.

关键词： Resistance exercise Children Physical fitness