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Synthesis, Crystal Structure and Anion Recognition Property of a Flexible Urea-functionalized Receptor

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Chinese Journal of Structural Chemistry 2019年第5期38卷 737-744,669页

作者： HUANG Chao YI Rui chen dong-mei ZHU Bi-Xue LU Ji-Hong College of Chemistry and Chemical Engineering Guizhou University

A flexible urea-functionalized receptor bearing two p-nitrobenzene units was designed and synthesized from the reaction of precursors 4-nitrophenyl isocyanate and 1,2-bis（2?-aminophenoxy） benzene. The receptor was characterized by 1 H NMR, MS, FTIR and elemental analysis, and the crystal structure of the receptor was determined by X-ray diffraction analysis. The crystal belongs to the orthorhombic system, space group Pca21 with a = 12.740（2）, b =14.133（3）, c = 15.842（3） ?, V = 2852.4（9） ?3, Z = 4, Mr = 620.57, Dc = 1.445 g/cm3, F（000） = 1288,= 0.0585 and wR = 0.1032 for 3177 observed reflections（Ⅰ > 2σ（Ⅰ））, and R = 0.1304 and wR =for all data. The results show that the receptor displays selective recognition ability for H2PO4– in DMSO with a series of anions using UV-Vis absorption spectra technique. Furthermore, the coordination reaction of the receptor with H2PO4– was investigated via UV-Vis spectra and 1 H *** stoichiometric ratio and the association constant（Ka） of the coordination reaction were obtained as well.

关键词： urea receptor crystal structure recognition property

Microstructural evolution during the progressive transformation-induced plasticity effect in a Fe-0.1C-5Mnmedium manganese steel

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 369-379页

作者： mei Zhang Wenhao Li Yangfei chen Yang Jiang Xiaofei Guo Han dong School of Materials Science and Engineering Shanghai UniversityShanghai 200444China State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai 200444China

The microstructural evolution of a cold-rolled and intercritical annealed medium-Mn steel(Fe-0.10C-5Mn)was investigated during uniaxial tensile ***-situ observations under scanning electron microscopy,transmission electron microscopy,and X-ray diffraction analysis were conducted to characterize the progressive transformation-induced plasticity process and associated fracture initiation *** findings were discussed with the local strain measurements via digital image *** results indicated that Lüders band formation in the steel was limited to 1.5%strain,which was mainly due to the early-stage martensitic phase transformation of a very small amount of the less stable large-sized retained austenite(RA),which led to localized stress concentrations and strain hardening and further retardation of *** small-sized RA exhibited high stability and progressively transformed into martensite and contributed to a stably extended Portevin-Le Chatelier *** volume fraction of RA gradually decreased from 26.8%to 8.2%prior to *** the late deformation stage,fracture initiation primarily occurred at the austenite/martensite and ferrite/martensite interfaces and the ferrite phase.

关键词： medium-Mn steel retained austenite progressive transformation-induced plasticity effect local strain fracture initiation

Synthesis and Optical Property of a New Zinc Complex Based on the Derivative of 2-(2’-Hydroxyphenyl)-1H-benzimidazole and Phenanthroline

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Chinese Journal of Structural Chemistry 2021年第4期40卷 487-494,407页

作者： YIN Guo-Jie ZHANG Hao-Yu TIAN Wen-Jie ZHAO Dan ZHANG Bin chen dong-mei School of Environmental Engineering and Chemistry Luoyang Institute of Science and TechnologyLuoyang 471023China College of Chemistry Zhengzhou UniversityZhengzhou 450000China

A novel zinc complex(ZnE) has been designed and synthesized based on the derivative of 2-(2’-hydroxyphenyl)-1-H-benzimidazole(HBI) and the neutral nitrogen-containing ligand(phen). The crystal of the title complex crystallizes in the monoclinic system, space group P2_(1)/n with a = 10.2631(2), b = 34.2166(6), c = 11.4103(3) A, β = 96.771(2)°, M_(r )= 844.24, V = 3978.99(14) A^(3), Z = 4, the final R = 0.0400 and wR = 0.1001 for 8107 observed reflections(I > 2σ(I)). In the title complex, the free protonated phenoxide moiety(4-OH) is successfully retained to realize pseudo-intramolecular hydrogen bonds with the coordinated O atom from the other ligand.

关键词： synthesis proton transfer intramolecular hydrogen bond

Inheritance and Molecular Marker of Resistance to Bot Canker in Malus domestica

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Agricultural Sciences in China 2011年第2期10卷 175-184页

作者： LIU Hai-tao LI Cai-li ZHANG Yu-jing LI Chun-min ZHAO Yong-bo chen dong-mei WANG Yi ZHANG Xin-zhong HAN Zhen-hai Institute for Horticultural Plants College of Agronomy and BiotechnologyChina Agricultural UniversityBeijing 100193P.R.China Changli Institute for Pomology Hebei Academy of Agriculture and Forestry SciencesChangli 066600P.R.China College of Horticulture Northeast Agricultural UniversityHarbin 150030P.R.China

Apple bot canker [Botryosphaeria dothidea（Moug.） *** de Not.] is distributed worldwide,resulting in a serious crop loss every year in apple（Malus domestica Borkh.） *** resistance of each seedling derived from a hybrid population（Jonathan×Golden Delicious） was evaluated by disease index either from natural infection in the field or from inoculation with five isolates of ***,Ls1,Lw023,Lw048,Mx1,and *** inheritance of the resistance to bot canker was analyzed via frequency distribution analysis,and microsatellite and AFLP markers linked to the resistance loci were *** the binary frequency distribution patterns,it was found that the segregation ratio of resistant/susceptible genotypes infected by pathogen isolates Lw023 and Ls1 was 1：15;and that by Zz26 and Mx1 was 15：*** variation of resistance was involved in the segregation of two to four alleles of major genes,the resistance was recessive when infected by Lw023 and Ls1,but was dominant when infected with Mx1 and Zz26.A microsatellite maker,CH02a04-450,and two AFLP markers,E-AG/M-GAC-280 and E-AGG/M-CTT-110,were identified,and their map distances to the resistance loci were 5.1,5.1 and 6.2 cM,*** three markers are located in different linkage groups,while CH02a04-450 is on linkage group 2 or 7.E-AG/M-GAC-280 was successfully converted into ***,CH02a04-450 and SCAR159 were re-examined in inoculated segregation population and presented a good reliability on predicting phenotypes of resistance.

关键词： Malus domestica Borkh. Botryosphaeria dothidea inheritance microsatellite AFLP

Diagnosis of the accurate genotype of HKαα carriers in patients with thalassemia using multiplex ligation-dependent probe amplification combined with nested polymerase chain reaction

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Chinese Medical Journal 2020年第10期133卷 1175-1181页

作者： dong-mei chen Shi Ma Xiang-Lan Tang Ji-Yun Yang Zheng-Lin Yang Clinical Medical School Southwest Medical UniversityLuzhouSichuan 646000China The Key Laboratory for Human Disease Gene Study of Sichuan Province and Institute of Laboratory Medicine Sichuan Provincial People's HospitalUniversity of Electronic Science and Technology of ChinaChengduSichuan 610072China Research Unit for Blindness Prevention of Chinese Academy of Medical Sciences(2019RU026) Sichuan Academy of Medical SciencesChengduSichuan 610072China Natural Products Research Center Institute of Chengdu BiologySichuan Translational Medicine HospitalChinese Academy of SciencesChengduSichuan 610072China.

Background:Patients carrying the HongKongαα(HKαα)allele and-α3.7/αααanti-4.2 could be misdiagnosed as-α3.7/ααby the current conventional thalassemia detection methods,leading to inaccurate genetic counseling and an incorrect prenatal *** study was aimed to accurately analyze the genotypes of HKααcarriers and-α3.7/ααα***::Samples were collected in our hospital from July 2017 to October ***-four common types of Chinese thalassemia were screened by gap-polymerase chain reaction(Gap-PCR)and reverse dot blot(RDB).Anti-4.2 multiplex-PCR was used to confirm carriers of theαααanti-4.2 duplication with-α3.7 ***-round nested PCR and multiplex ligation-dependent probe amplification(MLPA)were applied to accurately identify and confirm their *** data analysis,we used descriptive statistics and Fisher’s exact ***::Two thousand five hundred and forty-four cases were identified as thalassemia in 5488 peripheral blood *** results showed thatα,β,andαβcompound thalassemia were identified in 1190(46.78%),1286(50.55%),and 68(2.67%)cases,respectively.A total of 227 samples from thalassemia patients were identified as-α3.7/ααby Gap-PCR,and the genotypes of two samples were *** was a difference between Gap-PCR and combined groups(Gap-PCR combined with nested PCR and MLPA)in detecting HKαα(P<0.05).Among the 229 patients,20 patients were identified as HKααcarriers and one was identified as-α3.7/ααα anti-4.2 by two-round nested PCR and MLPA,including 15 patients with HKαα/αα,three with HKαα/αα and β-thalassemia coinheritance,one with HKαα/-SEA,one with HKαα/-α4.2 andβ-thalassemia coinheritance,and one with-α3.7/αααanti-4.2 and β-thalassemia ***::αααanti-4.2 and HKααgenotypes of patients carrying-α3.7 need to be detected to reduce the misdiagnosis rate of patients carrying HKααand-α3.7/αααanti-4.2 *** accurate genetic counseling can be provided in the clinic using nested PCR combined

关键词： Thalassemia HongKongαα Nested polymerase chain reaction Multiplex ligation-dependent probe amplification Gene dosage

Preparation of Low Ratio Magnesium Ccement by Acid Leaching Treatment of Boron Mud

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 120-129页

作者： YANG mei ZHANG Mingzhe chen Hao School of Materials Science and Engineering Shenyang Jianzhu UniversityShenyang 110168China School of Physical Science and Technology Shenyang Normal UniversityShenyang 110168China

The effects of liquid-solid ratio and reaction time on the leaching rate of magnesium at room temperature were investigated,as well as the effects of the molar ratio of MgO/MgCl_(2),the amount of water added,and the amount of acid-impregnated slag dosed on the compressive strength and water resistance of *** results showed that the magnesium element in the boron mud could be maximally leached under the conditions of 1:1 concentration of hydrochloric acid at room temperature,liquid-solid ratio of 2.5 mL·g^(-1),and reaction time of 5 h,and the main products were amorphous SiO_(2) as well as a small amount of magnesium olivine which had not been completely *** LR-MOC prepared using the acid-soaked mixture could reach a softening coefficient of 0.85 for 28 d of water immersion when the molar ratio of MgO/MgCl_(2) was 2.2,the amount of water added was 0 g,and the acid-soaked slag dosing was 40 wt%,which also led to an appreciable late-strength,with an increase of 19.4%in compressive strength at 28 d compared to that at 7 *** previous studies,LR-MOC prepared in this way has a final strength phase that is not the more easily hydrolysed 3-phase but the lath-like *** this phenomenon,we analyzed the mechanism and found that,during the acid leaching process,a part of amorphous SiO_(2) dissolved in the acid leaching solution formed a silica sol,in which Mg^(2+)played a bridging role to make the silica sol more *** the addition and hydrolysis of MgO,the silica sol gel coagulation slows down,providing a capping layer to inhibit the hydrolysis of the 5-phase crystals and providing some strength after *** amorphous SiO_(2) in the other part of the acid-impregnated slag generated M-S-H gel with Mg^(2+)and OH-,which synergised with the dense structure composed of interlocking crystals to improve the water resistance of LR-MOC.

关键词： boron mud magnesium chloride-oxygen cement acid immersion water resistance silica sol

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热浸镀镧铝钢的高温耐热行为研究

材料工程 2008年第7期36卷 51-54页

作者：张伟陈冬梅洛阳理工学院河南洛阳471023

在20碳钢上分别制备了热浸镀纯铝和镧铝涂层。经过900℃×6h的扩散处理后，研究了涂层的抗氧化性能和组织形貌变化。结果表明：热浸镀镧铝试样表面的纯铝层厚度比热浸镀纯铝试样减少25％～35％；经扩散处理后，在800℃氧化的前40h，热... 详细信息

在20碳钢上分别制备了热浸镀纯铝和镧铝涂层。经过900℃×6h的扩散处理后，研究了涂层的抗氧化性能和组织形貌变化。结果表明：热浸镀镧铝试样表面的纯铝层厚度比热浸镀纯铝试样减少25％～35％；经扩散处理后，在800℃氧化的前40h，热浸镀纯铝试样氧化动力学曲线符合抛物线规律，40h后，氧化动力学曲线呈直线。在整个氧化期间，热浸镀镧铝试样的氧化动力学曲线都符合抛物线规律，且抗高温剥落性能同样优于热浸镀纯铝试样。组织形貌分析表明，镧抑制了扩散和高温氧化过程中扩散层／基体界面孔洞的形成和聚集，阻止了扩散层的内氧化。分析了镧对镀铝钢高温耐热行为的影响机理。

关键词：热浸镀铝扩散处理氧化动力学镧

Study of angiogenesis induced by metastatic and non-metastatic liver cancer by corneal micropocket model in nude mice

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World Journal of Gastroenterology 1999年第2期5卷 28-30页

作者： SUN Hui Chuan, LI Xiao Ming, XUE Qiong, chen Jun, GAO dong mei and TANG Zhao You

AIM To study the angiogenesis induced by liver cancer with different metastatic potentials using corneal micropocket model in nude *** Corneal micropockets were created in nude mice. Tumor tissues and liver tissues were implanted into the corneal micropockets. Angiogenesis was observed using a digital camera under slit-lamp biomicroscope, and compared among different grafts and incision alone. Vascular responses were recorded in regard to the range, number and length of new blood vessels toward the grafts or *** Vascular responses induced by tumor tissues were greater than those by incision alone and liver tissue grafts. LCI-D20 induced more intensive angiogenesis than *** Highly metastatic liver cancer LCI D20 was more angiogenic than low metastatic cancer LCI D35 and liver tissue. Micropocket was a useful model to study dynamic process of angiogenesis in vivo.

关键词： liver neoplasms angiogenesis corneal micropocket model neoplasms metastasis

Endocannabinoid Signaling in Modulating Periimplantation Events

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Journal of Reproduction and Contraception 2008年第1期19卷 51-64页

作者： Hong-ying PENG Qi chen dong-mei TAN Yi TAN Laboratory Animal Center Chongqing Medical University Chongqing 400016 China State Key Laboratory of Reproductive Biology Institute of Zoology Chinese Academe of Science Beijing 100080 China

Cannabinoids have long been suspected associating with abnormal fetal growth and outcome. However, the molecular mechanisms in which they are involved had long been obscure for several decades. Only recently, after the identification of two types of cannabinoid receptors （CB1-R and CB2-R） and the following discoveries of their corresponding endogenous ligands, the mystery behind those seemingly facts began gradually unveiled. Through a series of landmark research, it is now indicated that the endocannabinoid signaling via the ligand-receptor interaction plays an important role in modulating early development of preimplantation embryo and synchronizing embryo development with uterine receptivity for implantation. Current data suggest that the physiological functions their metabolic pathways are potentially very of endocannabinoid signaling as well as exited areas to be explored further. This review will first introduce the reproductive functions of endocannabinoid signaling from epidemiological and molecular background, then focus on its reciprocal interactions between the embryo and maternal tissues, as well as related metabolic aspects in regards to implantation. It is hoped that further investigation of this physiologically fundamental signaling will generate more exciting information elucidating the complexity of implantation thus lead to a better control of human reproduction.

关键词： endocarmabinoid anandamide embryo preimplantation development embryo implantation metabolism FAAH NAPE-PLD COX-2