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Effects of neutral salt and alkali on ion distributions in the roots,shoots,and leaves of two alfalfa cultivars with differing degrees of salt tolerance

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Journal of Integrative Agriculture 2017年第8期16卷 1800-1807页

作者： WANG Xiao-shan REN hai-long WEI Zen-wu WANG yun-wen REN Wei-bo Department of Grassland Science College of Animal Science and TechnologyYangzhou UniversityYangzhou 225009P.R.China Institute of Grassland Research Chinese Academy of Agricultural SciencesHohhot 010000P.R.China Department of Grassland Science College of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193P.R.China

The effects of neutral salt and alkali on the ion distribution were investigated in two alfalfa （Medicago sativa L.） cultivars, including Zhongmu 1, a high salt-tolerant cultivar, and Algonquin, a low salt-tolerant cultivar. The alkali stress expressed more serious growth inhibition than the neutral salt stress at the same Na＋ concentration. Compared with Algonquin, Zhongmu 1 did not exhibit a higher alkali tolerance under the Na2CO3-NaHCO3 treatment with the low Na＋ concentration （50 mmol L-l）. The alkali increased the accumulation of Na＋, Ca2＋, and Mg2＋ in the root and changed the Ca2＋ and Mg2＋ balance in the entire alfalfa plant. The salt and alkali stresses decreased the K＋ and Fe3＋ contents of the roots and leaves, the root Mn2＋ content, and the shoot Zn2＋ content, but they increased the Fe3＋ accumulation of the shoots, the shoot and leaf Cu2＋ contents, and the leaf Zn2＋ content in both alfalfa cultivars. Based on the results obtained under the conditions of this experiment, we found that the salt and alkali stresses reduced the plant growth in both alfalfa cultivars, while the alkali caused a stronger stress than the neutral salt in alfalfa. Thus, we conclude that under hydroponic conditions, the deleterious effects of the alkali on plants are due to the distribution change of some trophic ion balance in the roots, shoots, and leaves of the plants by causing of Na＋, CO3^2-, and/or HCO3- stresses.

关键词： alfalfa ion distribution neutral salts alkali stress

First synthesis and characterization of key stereoisomers related to Ezetimibe

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Chinese Chemical Letters 2014年第8期25卷 1157-1160页

作者： yun Ren Yan-Jun Duan Ren-Jun Li Yong Deng Li hai Yong wu Key Laboratory of Drug Targeting and Drug Delivery System of the Education Ministry Department of Medicinal Chemistry West China School of PharmacySichuan University

uring the laboratory optimization and the late phase manufacturing studies of the cholesterol absorption inhibitor Ezetimibe 1, the formation of several stereoisomers was observed. To study the complete stereoisomer profile of Ezetimibe 1, we have synthesized and completely characterized several key stereoisomers of Ezetimibe 1 for the first time. This study will provide an access to the reference standard of these stereoisomers and may have some implications in the development of new medicines.

关键词： Ezetimibe Related substances Stereoisomers profile Synthesis Characterization

Vacuum Treatment for Simultaneous Desulphurization and Dephosphorization of Hot Metal and Molten Steel

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Journal of Iron and Steel Research International 2004年第2期11卷 14-17页

作者： WANG hai-chuan WANG Shi-jun ZHOU yun wu Bao-guo DONG Yuan-chi Anhui University of Technology

The vacuum treatment for simultaneous desulphurization and dephosphorization of hot metal and molten steel with pre-melted CaO-based slag was carried *** pre-treatment of hot metal,both desulphurization and dephosphorization are improved with the increase of CaO in slag,but deteriorated with the increase of CaF2 in *** average desulphurization and dephosphorization rate is 68.83 % and 78.46 %,*** molten steel,the substitution of BaO for CaO in slag has minor effect on simultaneous desulphurization and *** desulphurization and dephosphorization rate is higher than 90% and 50% respectively with the lowest final sulfur and phosphorus mass percent being 0.001 2% and 0.010%,*** overall effect of simultaneous desulphurization and dephosphorization of molten steel is better than that of hot metal.

关键词： hot metal molten steel desulphurization dephosphorization CaO-based slag vacuum treatment

New mucosal flap modification for endonasal endoscopic dacryocystorhinostomy in Asians

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International Journal of Ophthalmology(English edition) 2012年第6期5卷 704-707页

作者： Qing-Shan Ji Jing-Xiang Zhong yun-hai Tu Wen-Can wu Department of Ophthalmology the First Affiliated Hospital of Jinan University Department of Orbital and Oculoplastic Surgery Eye Hospital of Wenzhou Medical College Wenzhou 325027

AIM: To describe a simple modification of fashioning the mucosal flap for endonasal endoscopic dacryocystorhinostomy (EES-DCR) in Asians and investigate its efficacy. METHODS: A total of 120 patients with unilateral primary chronic dacryocystitis (PCD) were randomized into two groups: the new shaped nasal mucosal flap group (group A) and the removed nasal mucosal flap group (group B). All patients underwent standard EES-DCR. Patients in group A were performed a new shaped nasal mucosal flap covering the bared bone around the opened sac and those in group B was removed the nasal mucosal flap uncovering the bared bone. Patients were followed up for one year. The occurrence of granulation tissue, the proliferation of scar tissue and success rate of EES-DCR was compared. RESULTS: In the present study, complete postoperative data were acquired from 54 patients in group A and from 57 patients in group B. During process of review, the occurrence of granulation tissue was at the ostium margins account for 15% (8/54) in group A and 39% (22/57) in group B (P<0.05). At the one-year review, scar tissue was present in 5 patients in group A compared with 18 in group B (P<0.05). The success rate of EES-DCR was 98% (53/54) in group A and 84% (48/57) in group B (P<0.05). CONCLUSION: The simple modification of fashioning nasal mucosal flap can effectively cover the bared bone around the opened sac and reduce formation of granulation tissue, lessen the risk of scar tissue formation and closure of ostium, thus improve the success rate of EES-DCR in Asians.

关键词： mucosal flap endonasal endoscopic dacryocystorhinostomy chronic dacryocystitis

Scutellarein Ameliorated Chondrocyte Inflammation and Osteoarthritis in Rats

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Current Medical Science 2024年第2期44卷 355-368页

作者： Shao-ze JING Shu-han YANG yun-kun QU hai-hu HAO Hua wu Department of Orthopedics Third Hospital of Shanxi Medical UniversityShanxi Bethune HospitalShanxi Academy of Medical SciencesTongji Shanxi HospitalTaiyuan 030032China Department of Orthopedics Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

Objective:Osteoarthritis(OA)is a degenerative joint disorder characterized by the gradual degradation of joint cartilage and local *** study aimed to investigate the anti-OA effect of scutellarein(SCU),a single-unit flavonoid compound obtained from Scutellaria barbata ***,in ***:The extracted rat chondrocytes were treated with SCU and IL-1β.The chondrocytes were divided into control group,IL-1βgroup,IL-1β+SCU 50µmol/L group,and IL-1β+SCU 100µmol/L *** of rat chondrocytes was observed by toluidine blue and safranin O ***-8 method was used to detect the cytotoxicity of ***,qRT-PCR,Western blotting,immunofluorescence,SAβ-gal staining,flow cytometry,and bioinformatics analysis were applied to evaluate the effect of SCU on rat chondrocytes under IL-1β***,anterior cruciate ligament transection(ACL-T)was used to establish a rat OA *** changes were detected by safranin O/fast green,hematoxylin-eosin(HE)staining,and ***:SCU protected cartilage and exhibited anti-inflammatory effects via multiple ***,it could enhance the synthesis of extracellular matrix in cartilage cells and inhibit its *** addition,SCU partially inhibited the nuclear factor kappa-B/mitogen-activated protein kinase(NF-κB/MAPK)pathway,thereby reducing inflammatory cytokine production in the joint ***,SCU significantly reduced IL-1β-induced apoptosis and senescence in rat chondrocytes,further highlighting its potential role in OA *** vivo experiments revealed that SCU(at a dose of 50 mg/kg)administered for 2 months could significantly delay the progression of cartilage damage,which was reflected in a lower Osteoarthritis Research Society International(OARSI)score,and reduced expression of matrix metalloproteinase 13(MMP13)in ***:SCU is effective in the therapeutic management of OA and could serve as a potential candidate f

关键词： scutellarein osteoarthritis apoptosis mitogen-activated protein kinase(MAPK) nuclear factor kappa-B(NF-κB)

基于密度泛函理论研究Co、Ni、As掺杂载金黄铁矿的电子结构和稳定性

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原子与分子物理学报 2025年第1期42卷 145-155页

作者：吴德宝唐云李国辉吴波聂光华贵州大学矿业学院贵阳550025 贵州省非金属矿产资源综合利用重点试验室贵阳550025 紫金矿业集团股份有限公司龙岩364000

Co、Ni、As掺杂的黄铁矿晶体具有不同物理性质,会影响其载金性能和氧化行为.论文基于密度泛函理论计算,采用了CASTEP软件对载金黄铁矿以及不同晶体缺陷的载金黄铁矿进行模拟计算,以研究Co、Ni、As掺杂载金黄铁矿的电子结构,并据此分析... 详细信息

Co、Ni、As掺杂的黄铁矿晶体具有不同物理性质,会影响其载金性能和氧化行为.论文基于密度泛函理论计算,采用了CASTEP软件对载金黄铁矿以及不同晶体缺陷的载金黄铁矿进行模拟计算,以研究Co、Ni、As掺杂载金黄铁矿的电子结构,并据此分析其稳定性.综合半导体类型和能量分析,不同晶体缺陷的载金黄铁矿稳定性顺序为:Fe_(32)S_(63)AsAu

关键词：载金黄铁矿掺杂密度泛函理论氧化预处理

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Probing Photocatalytic Hydrogen Evolution of Cobalt Complexes: Experimental and Theoretical Methods

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Chinese Journal of Structural Chemistry 2021年第12期40卷 1696-1709,1556页

作者： wu hai-Su MIAO Ti-Fang SHI hai-Xia XU yun FU Xian-Liang QIAN Li School of Chemistry and Materials Science Huaibei Normal UniversityHuaibei 235000China College of Pharmacy Youjiang Medical College for NationalitiesBaise 533000China

This work reports on the synthesis and characterization of a series of Schiff-base cobalt(III)complexes 1〜4 that exhibit an obvious catalytic activity for hydrogen production in aqueous solution using fluorescein(FL)and triethanolamine(TEOA)as photosensitizer and electron donor,*** complexes display the capability of splitting of water for H2 *** optimized conditions,complex 3 shows better properties for photocatalysis,25 mg of which can release 152.3μmol of H_(2) after irradiation for 3 *** mechanism for light-driven H_(2) production was explored by experiments and density functional theory(DFT).Meanwhile,the reason of releasing hydrogen was explained theoretically in *** research results will help to understand the interaction of cobalt complexes with the photosensitizer and design new photocatalysis for the future.

关键词： hydrogen production cobalt complex photocatalysis theoretical calculation

Electrochemical chemoselective thiocarbamylation of late-stage Tyr-containing drugs and peptides

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Science China Chemistry 2024年第10期67卷 3382-3388页

作者： Wan-Jie Wei Xin-Yu Wang hai-Tao Tang Fei-Hu Cui yun-Qi wu Ying-Ming Pan State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources(Ministry of Education of China)Collaborative Innovation Center for Guangxi Ethnic MedicineSchool of Chemistry and Pharmaceutical SciencesGuangxi Normal UniversityGuilin 541004China

The synthesis and modification of peptides occupy a unique position in the field of drug development,and the functionalization of amino acids is a valuable strategy as an alternative to peptide ***,the development of tyrosine(Tyr)as a target amino acid is a major challenge in the field of ***,we report an electrochemical radical coupling reaction of labeling tyrosine-containing active drugs and peptides with thiocarbamate derivatives for the first *** tri-component,onepot reaction can be performed smoothly under simple,gentle,and clean electrochemical conditions and is suitable for the functionalization of various Tyr-containing drug molecular derivatives and peptides.

关键词： tyrosine electrochemical radical coupling chemical modification peptides

Asymptotic analysis of outwardly propagating spherical flames

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Acta Mechanica Sinica 2012年第2期28卷 359-366页

作者： yun-Chao wu Zheng Chen State Key Laboratory for Turbulence and Complex SystemsDepartment of Mechanics and Aerospace Engineering Department of Aeronautics and AstronauticsCollege of EngineeringPeking University100871 BeijingChina

Asymptotic analysis is conducted for outwardly propagating spherical flames with large activation energy. The spherical flame structure consists of the preheat zone, reaction zone, and equilibrium zone. Analytical solutions are separately obtained in these three zones and then asymp- totically matched. In the asymptotic analysis, we derive a correlation describing the spherical flame temperature and propagation speed changing with the flame radius. This cor- relation is compared with previous results derived in the limit of infinite value of activation energy. Based on this correla- tion, the properties of spherical flame propagation are inves- tigated and the effects of Lewis number on spherical flame propagation speed and extinction stretch rate are assessed. Moreover, the accuracy and performance of different mod- els used in the spherical flame method are examined. It is found that in order to get accurate laminar flame speed and Markstein length, non-linear models should be used.

关键词： Propagating spherical flames Asymptotic anal- ysis Lewis number Stretch rate