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Substituent effects on novel lanthanide(Ⅲ) hydrazides complexes

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Journal of rare Earths 2020年第6期38卷 642-648页

作者： Samira G.Brandao Marcos A.ribeiro rafael v.Perrella Paulo C.de Sousa Filho Priscilla P.luz Department of Chemistry Federal University of Espirito Santo29075-910VitoriaESBrazil institute of Chemistry University of CampinasPO Box 615413083-970CampinasSPBrazil

new lanthanide(Eu3+ and Gd3+) complexes were successfully synthesized and the effect of the p-phe nyl substituent on the Eu3+luminescent properties was *** this sense,benzhydrazide,p-toluic hydrazide,4-hydroxybenzhydrazide and 4-aminobenzoic hydrazide were used as ligands and the complexes were obtained by mixing the lanthanide salts with hydrazides in ethanol at room temperature and keeping the reaction for 2 h under mechanical *** of Gd-amino was obtained and its structure was elucidated by single-crystal X-ray diffraction,revealing that Gd3+centered in a distorted tricapped trigonal-prismatic molecular *** spectroscopy and the elucidated structure confirm hydrazides acting as bidentate ligands binding to ln3+ions through the oxygen of carbonyl group and the nitrogen of terminal amine,forming a five-membered ring,CHn analyses confirm the molecular formulas [Gd(amino)4(H2 O)](nO3)3·(C2 H5 OH) and [Eu(toluic)3(H2 O)3](nO3)*** T1 state energies are observed for ligands p-substituted with higher electron donating capacity groups,such as p-nH2 and *** contrast,higher lifetimes and quantum efficiencies are obtained for Eu3+complexes with ligands p-H and p-CH3 substituted,which are not deactivator groups.

关键词： Lanthanide Hydrazide Substituent effect Photoluminescence Europium Gadolinium

interpretation of thermal dependence of magnetic aftereffect for magnetic nanocomposite with slow decay rates

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international Journal of Smart and nano Materials 2013年第2期4卷 91-101页

作者： Shuo Gu Yi Jin Gary r.Kahler Ming Zhang Peijie Chen Mohammadreza Ghahremani Edward Della Torre Lawrence H.Bennett Department of Electrical and Computer Engineering The George Washington UniversityWashington DC 20052 USA Department of Chemistry The George Washington UniversityWashington DC 20052USA

A new experimental characterization is presented of time-,field-,and temperature-dependent dynamic effects in magnetization of a nanocomposite which displays slow *** and temperature variations of irreversible susceptibility,χirr,decay coefficient,S,fluctuation field,hf,and activation volume,v,have been calculated for the nanocomposite sample(Co_(80)ni_(20))using a recently developed modified Preisach–Arrhenius(MPA)*** sample is composed of non-interacting nanoparticles hav.n. negligible reversible ***-Arrhenius behavior is observed in both the maximum decay coefficient,Smax,and the fluctuation field,hf,as a function of temperature *** peak of both temperature curves are identical and occur at a critical temperature Tk of∼50 K,which agrees with our experimental *** on the effect of a temperature-dependent chemical potential on energy barrier,hf is studied for Tnd T≥Tk,respectively.A more complete MPA model that can predict the magnetization as function of time,field and temperature for a magnetic material with slow decay rates is *** model uses a multi-variable analytical formula,m(ln(t),H,T),which incorporates the characteristic parameters.

关键词： magnetic aftereffect fluctuation field numerical modeling Co_(80)ni_(20)nanocomposite

Hybrid ni_(2)P/CoP nanosheets as Efficient and robust Electrocatalysts for Domestic Wastewater Splitting

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Energy & Environmental Materials 2023年第5期6卷 330-339页

作者： Yeshu Tan Jianrui Feng Liqun Kang Longxiang Liu Fangjia Zhao Siyu Zhao Dan J.L.Brett Paul r.Shearing Guanjie He iv.n.P.Parkin Christopher ingold Laboratory Department of ChemistryUniversity College LondonLondon WC1H 0AJUK Materials and Catalysis Laboratory Department of Chemical EngineeringUniversity College LondonLondon WC1E 7JEUK Electrochemical innovation Laboratory Department of Chemical EngineeringUniversity College LondonLondon WC1E 7JEUK School of Chemistry University of LincolnJoseph Banks LaboratoriesLincolnLN67DLUK

The development of low-cost,robust and efficient non-noble metal electrocatalysts is still a pursuit for the hydrogen evolution reaction(HEr).Herein,a self-standing electrocatalyst,ni_(2)P/CoP nanosheet,was fabricated directly on three-dimensional ni foams by two facile steps,which illustrated both high activity and stability for HEr in different *** from the porous structures of nanosheets with large specific surface area and the hybrid ni_(2)P/CoP,the as-prepared electrocatalyst presented remarkable HEr with overpotentials of 65.2 and 87.8 mv to reach a current density of-10 mA cm^(-2)in neutral and alkaline media,*** function theory calculations revealed a lower activation energy of water dissociation and efficient HEr steps of hybrid ni_(2)P/CoP nanosheets compared with mono *** self-standing electrocatalyst maintained excellent chemical ***,the HEr process in domestic wastewater was realized with more impressive performance by using ni_(2)P/CoP nanosheets compared with commercial Pt/*** was continuously generated for 20 h in mildly alkaline dishwashing *** work provides a feasible way to fabricate non-noble metal and self-standing hybrid bimetallic phosphides for HEr in neutral and alkaline media,showing great potential for efficient hydrogen production by re-utilizing wastewater resources.

关键词： hybrid hydrogen evolution reaction ni_(2)P/CoP nanosheet self-standing wastewater splitting

The Basics of Flat Space Cosmology

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international Journal of Astronomy and Astrophysics 2015年第2期5卷 116-124页

作者： Eugene Terry Tatum U. v. S. Seshavatharam S. Lakshminarayana 760 Campbell ln. Ste. 106 #161 Bowling Green USA Honorary Faculty I-SERVE Alakapuri Hyderabad-35 Telangana India Department of nuclear Physics Andhra University Visakhapatnam India

We present a new model of cosmology which appears to show great promise. Our flat space cosmology model, using only four basic and reasonable assumptions, derives highly accurate Hubble parameter H0, Hubble radius r0 and total mass M0 values for our observable universe. Our model derives a current Hubble parameter of , in excellent agreement with the newly reported (lower limit) results of the 2015 Planck Survey. remarkably, all of these derivations can be made with only these basic assumptions and the current CMB radiation temperature . The thermodynamic equations we have generated follow Hawking’s black hole temperature formula. We have also derived a variety of other useful cosmological formulae. These include angular velocity and other rotational formulae. A particularly useful hyperbolic equation, , has been derived, which appears to be an excellent fit for the Planck scale as well as the current observable universe scale. Using the flat space Minkowski relativistic formula for Doppler effect, and a formula for staging our cosmological model according to its average mass-energy density at every Hubble time (universal age) in its expansion, a persuasive argument can be made that the observable phenomena attributed to dark energy are actually manifestations of Doppler and gravitational redshift. Finally, a theory of cosmic inflation becomes completely unnecessary because our flat space cosmology model is always at critical density.

关键词： Flat Space Cosmology Cosmic inflation Dark Energy Hubble Parameter Critical Density Angular velocity Light Speed Expansion Light Speed rotation redshift Universe CMBr

Flat Space Cosmology as a Mathematical Model of Quantum Gravity or Quantum Cosmology

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international Journal of Astronomy and Astrophysics 2015年第3期5卷 133-140页

作者： Eugene Terry Tatum U. v. S. Seshavatharam S. Lakshminarayana 760 Campbell ln. Ste. 106 #161 Bowling Green KY USA Honorary Faculty I-SERVE Hyderabad India Department of nuclear Physics Andhra University Visakhapatnam India

We review here the recent success in modeling our expanding universe according to the rules of flat space cosmology. Giv.n.only a few basic and reasonable assumptions and a single observational input, our model derives a variety of results which correlate with astronomical observations, including best estimates of the size, total mass, temperature, age and expansion rate of our observable universe. Considering the apparent success of our model, we attempt to explain why we think it works so well, including the fact that it incorporates elements of both general relativity and quantum mechanics. We offer this approach as a possible av.n.e towards understanding cosmology at the quantum level (“quantum gravity”).

关键词： Flat space Cosmology Hubble Parameter Hubble radius CMBr redshift Schwarzschild Formula Hawking Black Hole Temperature Formula Quantum Gravity

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老年狼疮性肾炎26例临床和病理分析

浙江医学 2011年第10期33卷 1447-1449,1455页

作者：邢洁鲁盈杭州市中医院肾内科 310007 宁波市中医院肾内科

目的探讨老年狼疮肾炎（ln）肾损害的临床和病理特点。方法选择我院收治的老年ln患者26例（发病年龄≥50岁），随机抽取同期住院的50例中青年ln患者（发病年龄〈50岁）作为对照组，比较分析两组患者的临床与肾病理特点。结果老年组男性... 详细信息

目的探讨老年狼疮肾炎（ln）肾损害的临床和病理特点。方法选择我院收治的老年ln患者26例（发病年龄≥50岁），随机抽取同期住院的50例中青年ln患者（发病年龄〈50岁）作为对照组，比较分析两组患者的临床与肾病理特点。结果老年组男性发病率和误诊率均较对照组增高，确诊时间较对照组延长。老年组血尿发生率和24h尿蛋白排泄量均低于对照组，但高血压发生率和血肌酐水平高于中青年组；肾脏病理类型分布老年组与中青年组的差异无统计学意义，以Ⅳ型、v型多见，临床上多表现为肾炎综合征和’肾病综合征；老年组血清抗核抗体水平及特异性抗体（抗双链DnA、抗Sm抗体）阳性率偏低。在治疗上起始激素用量明显低于中青年组，近期疗效相仿，但副作用发生率高于中青年组。结论老年ln患者男性发病比例增高、临床表现不典型、血清特异性抗体阳性率低，容易误诊和漏诊：老年ln患者血尿、蛋白尿水平低于中青年组，但血肌酐显著增高；治疗上对于老年ln患者应严格掌握激素使用指征及剂量，密切监测副作用，注意并发症的综合治疗。

关键词：狼疮肾炎老年人肾活检病理

Site 0ccupancy of Alloying Elements and Their Effects on the D0_3 Phase Stability in Fe_3Al

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Journal of Materials Science & Technology 1999年第4期15卷 339-341页

作者： Jun CAF Shaojun LiU Ying LOU and Benkuan usDepartment 0f Physics, Beijing n0rmal University, Beijing lO0875, ChinaSuqing D UAninstitute of Applied Physics and Computati0nal Mathematics, Beijing 100088, China Department of Physics Beijing Normal University Beijing 100875 China institute of Applied Physics and Computational Mathematics Beijing 100088 China

The effects of ternary solutes Ti, Co, v, Cr, Ta, W and Mo on the D03 phase 5tability of Fe3Alintermetallics are investigated by tight-binding linear Muffin-tin orbitai method. The predictedsite preference5 of these elements in Fe3Ai are in agreement with the experimental *** calculated iocal magnetic moment of Fe3Ai is identical to the experimentai. ln addition, itis found that the D03 phase stability of Fe3Ai doped with Ti, v, Co and Cr depends on 'energygap- of energy band near Fermi level. while the D03 phase stability of Fe3Ai doped with Ta, Wand Mo may be affected by Madelung energy.

关键词： Al Fe Site 0ccupancy of Alloying Elements and Their Effects on the D03 Phase Stability in Fe3Al

狼疮肾炎中医风湿内扰证候与血Fractalkine及尿血管细胞黏附分子-1的相关性研究

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中华中医药学刊 2019年第1期37卷 120-124页

作者：韩梅严小倩鲁盈刘琴浙江省立同德医院浙江杭州310012

目的:通过分析狼疮肾炎患者血Fractalkine(FKn)以及尿血管细胞黏附分子-1(vascular cellular adhesion molecule-1,vCAM-1)的水平及实验室常用指标与中医风湿内扰证候之间的关系。方法:对确诊为66例狼疮肾炎患者进行辨证分型分为风湿内... 详细信息

目的:通过分析狼疮肾炎患者血Fractalkine(FKn)以及尿血管细胞黏附分子-1(vascular cellular adhesion molecule-1,vCAM-1)的水平及实验室常用指标与中医风湿内扰证候之间的关系。方法:对确诊为66例狼疮肾炎患者进行辨证分型分为风湿内扰组36例及非风湿内扰组30例。另选取健康体检的正常人20例作为对照组,收集临床资料及实验室指标并同步留取血、尿标本,ELiSA法检测86例标本血Fractalkine与尿vCAM-1水平,综合分析风湿内扰证候与上述指标之间的关系。结果:(1)风湿内扰组患者较非风湿内扰组易出现发热乏力(45.8%vS 19.2%)、关节炎(29.2%vS 3.8%)、高血压(35.9%vS 7.7%)、浮肿(41.7%vS 0%)(Practalkine(1.78±1.19 vS 0.94±0.83)及尿vCAM-1(62.37±27.65 vS 27.21±30.14)水平均显著高于非风湿内扰组(PvS 127.04±12.32)、血白蛋白定量(34.77±6.92 vS 43.33±3.08)均低于非风湿内扰组(PvS 278.25±178.86)、尿红细胞定量(10.00(0.75,20.00)vS 0.00(0.00,0.75))均高于非风湿内扰组,(PnA滴度、anti-dsDnA及anti-SM阳性率明显高于非风湿内扰组(Pi积分、BiLAG积分均高于非风湿内扰组(Practalkine、尿vCAM-1、尿红细胞、24 h尿蛋白、SLEDAi积分、BiLAG积分、AnA滴度呈正相关(Piv型及iv+v型为主。结论:狼疮肾炎风湿内扰证候与疾病活动度密切相关,当临床出现风湿内扰证时需警惕狼疮肾炎疾病的活动。

关键词：狼疮肾炎风湿内扰血Fractalkine 尿血管黏附分子-1

ATMOSPHEriC TrACE METAL MEASUrEMEnTS OF Air PArTiCULATE ln SOUTHErn PUErTO riCO

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ATMOSPHERIC TRACE METAL MEASUREMENTS OF AIR PARTICULATE lN S...