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In situ synthesis and hardness of TiC/Ti_5Si_3 composites on Ti-5Al-2.5Sn substrates by gas tungsten arc welding

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International Journal of Minerals,Metallurgy and Materials 2013年第3期20卷 284-289页

作者： Wen-qing yan Le Dai chi-bin Gui School of Mechanical and Automotive Engineering South China University of Technology School of Materials and Metallurgy Wuhan University of Science and Technology Military Representative Office of Navy 407 Factory College of Materials Science and Engineering Huazhong University of Science and Technology

TiC/TisSi3 composites were fabricated on Ti-5A1-2.5Sn substrates by gas tungsten arc welding （GTAW）. Identification of the phases was performed using X-ray diffraction （XRD）. The microstructures were analyzed using scanning electron microscopy （SEM） combined with energy-dispersive X-ray spectrometry （EDS） and optical microscopy （OM）. The Vickers hardness was measured with a micro-hardness tester. The TiC/TisSi3 composites were obtained in a double-layer track, and the Vickers hardness of the track increased by two to three times compared with the Ti-5A1-2.5Sn substrate.

关键词： titanium alloys surface modification gas tungsten arc welding (GTAW) microstructure hardness

Synthesis and Crystal Structure of Ethyl 2,7,7-Trimethyl-4-(4'-methylphenyl)- 5-oxo-1,4,5,6,7,8-hexahydroquinoline-3- carboxylate in Aqueous Medium

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chinese Journal of Structural Chemistry 2005年第6期24卷 696-700页

作者： SHIDa-qing MOUJie ZHUANGQi-ya WANGXiang-Shan DepartmentofChemistry XuzhouNormalUniversityXuzhou221116China／／KeyLaboratoryofBiotechnologyonMedicalPlantsofJiangsuProvinceXuzhou221116China DepartmentofChemistry XuzhouNormalUniversityXuzhou221116China

The title compound (C22H27NO3) was obtained by the reaction of 4-methylbenzal- dehyde, dimedone, ethyl acetoacetate and ammonium acetate in water in the presence of triethyl- benzylammonium chloride (TEBA). The crystal is of orthorhombic, space group Pbcn with a = 18.242(2), b = 15.651(1), c = 14.207(2) ?, V = 4056.15(64) ?3, Mr = 353.45, Z = 8, Dc = 1.158 g/cm3, μ = 0.076, λ(MoKα) = 0.71073 ? and F(000) = 1520. The final R = 0.0453 and wR = 0.0436 for 1156 observed reflections with I > 2σ(I). X-ray analysis revealed that the pyridine ring is of boat conformation and the six-member ring fused with it adopts half-chair conformation.

关键词： hexahydroquinoline crystal structure green synthesis

Ligand-controlled NiH-catalyzed regiodivergent hydroalkylation of 2-alkenylazaarenes

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Science china Chemistry 2024年第6期67卷 1935-1940页

作者： ya-Ping Shao Zhuo-Min chi Yong-Min Liang State Key Laboratory of Applied Organic Chemistry School of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou730000China

A nickel-hydride(Ni H)-catalyzed migratory and nonmigratory hydroalkylation reaction of 2-alkenyl azaarenes with alkyl iodines has been established through strategic modulation of N-or P-donor *** method enables the synthesis of diverseβ-orγ-branched aromatic *** mild regiodivergent protocols exhibit wide substrate scope,excellent functional tolerance,and great reaction yield with remarkable ***,deuterium labeling studies reveal Ni H-catalyzed interrupted chain-walking mode as the mechanism behind remotedβ-selective hydroalkylation reaction—an interesting phenomenon mediated through aromatic imine directing groups.

关键词： NiH regiodivergent hydroalkylation azaarenes interrupted chain-walking

Coexistence of tuberculosis and squamous cell carcinoma in the right main bronchus:A case report

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World Journal of Clinical Cases 2021年第25期9卷 7520-7526页

作者： Hui Jiang ya-qing Li Department of Internal Medicine Zhejiang Provincial People’s HospitalPeople’s Hospital of Hangzhou Medical CollegeHangzhou 310014Zhejiang ProvinceChina Department of Internal Medicine Cancer Hospital of the University of Chinese Academy of Sciences(Zhejiang Cancer Hospital)Hangzhou 310014Zhejiang ProvinceChina

BACKGROUND Lung cancer with pulmonary tuberculosis(TB)refers to the occurrence of lesions simultaneously or sequentially in the lung(s)of the same patient,and the pathological examination and sputum TB examination diagnose them as lung cancer and TB,*** occurrence of endobronchial TB(EBTB)with endobronchial tumor sequentially in the same bronchus lesion of the same patient is relatively *** SUMMARY A 62-year-old female patient was admitted to a local hospital on June 18,2019 after a 3-mo history of *** was a farmer and had no history of smoking and alcohol *** patient had neither family nor work contact indicating exposure to *** chest computed tomography(CT)examination showed that the right main bronchus was occupied and malignant tumor was *** examination of a bronchial biopsy showed granulomatous inflammation with caseification and the presence of acid fast bacilli(AFB).However,after 6 mo of antitubercular treatment,repeat bronchoscopy and biopsy histological examination showed squamous cell *** patient has started on systemic chemotherapy with *** another two cycles of therapy,chest CT showed complete resolution of the *** lavage and bronchial aspirate were negative for AFB and cancer *** It is not only more likely that a patient presenting with what appears to be TB will concurrently have a pulmonary malignancy than someone who does not have a TB infection,but also that it is of greater urgency to make an expedited diagnosis of the malignancy.

关键词： Tumorous endobronchial tuberculosis Bronchial squamous cell cancer Diagnosis Treatment Case report

Spiro(phosphoamidite) ligand(SIPHOS)/Cu(OTf)2-catalyzed highly regio-and stereo-selective hydroborations of internal alkynes with diborane in water

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chinese Chemical Letters 2017年第6期28卷 1163-1166页

作者： qing-qing Xuan ya-Hui Wei Qiu-Ling Song Institute of Next Generation Matter Transformation College of Chemical Engineering and College of Material Sciences at Huaqiao University Xiamen 361021China

The highly regio-and stereoselective hydroborations of unactivated internal alkynes with diboron compound catalyzed by Cu（OTf）2 with spiro（phosphoamidite） as ligand in the presence of Cs2CO3 in water was *** proto... 详细信息

关键词： Unactivated internal alkynes Diboron compound Spiro(phosphoamidite) ligand Aqueous synthesis Multi-substituted vinylboranes

Effects of Ionic Strength and Sesquioxides on Adsorption of Toxin of Bacillus thuringiensis *** on Soils

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Pedosphere 2012年第1期22卷 96-102页

作者： FU qing-Ling PENG ya-Wen HUANG Tao HU Hong-qing DENG ya-Li YU Xia Key Laboratory of Subtropical Agricultural Resource and Environment Ministry of AgricultureHuazhong AgriculturalUniversityWuhan 430070(China)

Chemical reactions and fate of the toxins of Bacillus thuringiensis （Bt） in the soil environment are causing increasing concerns due to the large-scale cultivation of transgenic Bt plants. In this study, the effect of ionic strength （0-1 000 mmol kg-1） adjusted by NaCl or CaCl2 on adsorption of Bt toxin by a lateritic red soil, a paddy soil and these soils after chemical removal of organic-bound or free Fe and Al oxides, as well as by pure minerals （goethite, hematite and gibbsite） which are widespread in these soils, were studied. The results indicated that when the supporting electrolyte was NaCl, the adsorption of Bt toxin by the lateritic red soil and paddy soil increased rapidly until the ionic strength reached 250 mmol kg-1 and then gradually slowed down with the increase of ionic strength; while in ease the supporting electrolyte was CaCl2, the adsorption of Bt toxin enhanced significantly at low ionic strength （〈 10 mmol kg-1） and then decreased as the ionic strength increased. The adsorption of Bt toxin by the tested minerals and soils after the removal of organic-bound or free Fe and Al oxides also increased with increasing ionic strength controlled by NaCl. Removing organic-bound Fe and Al oxides obviously increased the adsorption of Bt toxin in the tested soils. Differently, removing free Fe and Al oxides increased the Bt adsorption by the paddy soil, but decreased the adsorption by the lateritic red soil. The study indicated that the varieties of ionic strength and the presence of Ve and Al oxides affected the adsorption of Bt toxin by the soils, which would contribute to the further understanding of the fate of Bt toxin in the soil environment and provide references for the ecological risk assessment of transgenic Bt plants.

关键词： Al oxides Fe oxides lateritic red soil paddy soil supporting electrolyte

Formaldehyde degradation by UV/TiO_2/O_3 process using continuous flow mode

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Journal of Environmental Sciences 2007年第9期19卷 1136-1140页

作者： QI Hong SUN De-zhi chi Guo-qing School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150090 China.

The degradation of formaldehyde gas was studied using UV/TiO2/O3 process under the condition of continuous flow mode. The effects of humidity, initial formaldehyde concentration, residence time and ozone adding amount on degradation of formaldehyde gas were investigated. The experimental results indicated that the combination of ozonation with photocatalytic oxidation on the degradation of formaldehyde showed a synergetic action, e.g,, it could considerably increase decomposing of formaldehyde. The degradation efficiency of formaldehyde was between 73.6% and 79.4% while the initial concentration in the range of 1.84--24 mg/m^3 by O3/TiO2flJV process. The optimal humidity was about 50% in UV/TiO2/O3 processs and degradation of formaldehyde increases from 39.0% to 94.1% when the ozone content increased from 0 to 141 mg/m^3. Furthermore, the kinetics of formaldehyde degradation reaction could be described by Langmuir-Hinshelwood model. The rate constant k of 46.72 mg/（m^***） and Langmuir adsorption coefficient K of 0.0268 m^3/mg were obtained.

关键词： UV/TiO2/O3 process formaldehyde continuous flow mode

Fabricating functionally graded Fe-Cr-Co permanent magnetic alloys via laser powder bed fusion

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Journal of Iron and Steel Research International 2024年第3期31卷 729-737页

作者： ya-zhou He ya-qing Hou Peng Shen Hao Zhang Dong Zhou Hang Su Central Iron and Steel Research Institute Co. Ltd.Beijing 100081China Material Digital R&D Center China Iron and Steel Research Institute Group Co.Ltd.Beijing 100081China

Laser powder bed fusion(LPBF)in-situ alloying technology offers the possibility to construct gradient materials with varied structures and *** graded Fe-Cr-Co permanent magnetic alloys were fabricated by LPBF and in-situ alloying mixed powders of Fe,Cr,and Co *** effects of different Fe,Cr and Co contents on the microstructure,magnetic properties and hardness of Fe-Cr-Co alloys prepared by LPBF were *** as-built Fe-Cr-Co alloys present a single body-centered-cubic phase and have a homogeneous distribution of *** mechanical properties and magnetic properties of the compositionally graded sample show a gradient *** the increase in Cr content,the Vickers hardness of the sample increases,and the saturation magnetization of the sample *** optimal magnetic properties in an isotropic state are given as coercivity HcB=21.65 kA/m,remanence Br=0.70 T and energy product(BH)_(max)=5.35 kJ/m^(3),which are comparable to or higher than the reported magnetic properties in an isotropic state prepared by traditional powder *** in-situ alloying technology has the potential to further explore Fe-Cr-Co magnetic materials,such as those consisting of multiple or more constituent elements,and to maximize the compositional flexibility of magnetic materials.

关键词： Fe-Cr-Co alloy Laser powder bed fusion In-situ alloying Functional material Magnetic property

巨噬细胞在血液透析用自体动静脉内瘘成熟与失功中的作用

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中国血液净化 2025年第1期24卷 54-57页

作者：邹佳乐迟雁青河北医科大学第三医院肾内科石家庄050051

炎症在自体动静脉内瘘(arteriovenous fistula,AVF)血管重塑的早期与晚期阶段均发挥着至关重要的调节作用。作为炎症反应中的重要免疫细胞之一,巨噬细胞具有在微环境中极化为炎症型(M1)和抗炎型(M2)等表型的能力。它们在炎症的发生、发... 详细信息

炎症在自体动静脉内瘘(arteriovenous fistula,AVF)血管重塑的早期与晚期阶段均发挥着至关重要的调节作用。作为炎症反应中的重要免疫细胞之一,巨噬细胞具有在微环境中极化为炎症型(M1)和抗炎型(M2)等表型的能力。它们在炎症的发生、发展和消退过程中扮演着关键角色,并在AVF经历手术创伤下及血流动力学改变、缺氧和高脂血症等环境下能发挥重要调控作用,影响AVF的成熟或失功。目前,一些免疫抑制剂和他汀类药物已被证实能够减少巨噬细胞的浸润,从而改善AVF的通畅性。因此,深入了解巨噬细胞在AVF血管重塑中的作用,同时寻找更有效的调控巨噬细胞的方法可能成为提高AVF成熟率和保持通畅性的新方向。

关键词：巨噬细胞自体动静脉内瘘炎症