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Special characteristics of fluorescence and resonance Rayleigh scattering for cadmium telluride nanocrystal aqueous solution and its interactions with aminoglycoside antibiotics

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Science China Chemistry 2009年第1期52卷 76-85页

作者： LI TaiShan LIU ShaoPu LIU zhongfang HU XiaoLi ZHANG LiPing School of Chemistry and Chemical Engineering Southwest UniversityChongqing 400715China Tangshan Environmental Monitoring Center Tangshan 063000China Hebei Energy Institute of Vocation and Technology Tangshan 063000China

CdTe nanocrystals(CdTe NCs) were achieved by reaction of CdCl2 with KHTe solution and were capped with sodium *** product was detected by transmission electron microscopy(TEM),high-resolution transmission electron microscopy(HRTEM),energy dispersive spectroscopy(EDS),fluorescence spectra,ultraviolet-visible spectra and X-ray diffraction(XRD).The CdTe NCs are of cubic structure and the average size is about 5 *** fluorescence quantum yield of CdTe NCs aqueous solution increased from 37% to 97% after 20 d under room *** maximum λem of fluorescence changed from 543 nm to 51. nm and the blue shift was 33 *** NCs aqueous solution can be steady for at least 1. months at 4℃ in a *** resonance Rayleigh scattering(RRS) of CdTe NCs in the aqueous solution was *** maximum scattering peak was located at about 554 *** interactions of CdTe NCs with amikacin sulfate(AS) and micronomicin sulfate(MS) were investigated *** effects of AS and MS on fluorescence and RRS of CdTe NCs were *** was found that AS and MS quenched the photoluminescence of CdTe NCs and enhanced RRS of CdTe *** optimum conditions,there are linear relationships between quenching intensity(F0-F),intensity of RRS(I-I0) and concentration of AS and *** detection limits(3б) of AS and MS are respectively 3.4 ng·mL-1.and 2.6 ng·mL-1.by the fluorescence quenching method,and 1..2 ng·mL-1.and 1..0 ng·mL-1.by the RRS *** methods have high sensitivity,thus CdTe NCs may be used as fluorescence probes and RRS probes for the detection of aminoglycoside antibiotics.

关键词： CdTe nanocrystal fluorescence characteristics resonance Rayleigh scattering amikacin sulfate micronomicin sulfate

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Recent Advances in Aromatic Antimony Clusters

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Chinese Journal of Chemistry 2018年第10期36卷 955-960页

作者： Lei-Jiao Li Basharat Ali zhongfang Chen Zhong-Ming Sun School of Chemistry & Environmental Engineering Changchun University of Science & Technology Changchun Jilin I30022 China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022 China University of Science and Technology of China Hefei Anhui 230026 China Department of Chemistry University of Puerto Rico Rio Piedras Campus San Juan PR 00931 USA

This paper highlights the compounds containing Sb cluster fragments, either synthesized in the solid-state, discovered from the gas phase, or only theoretically predicted. These Sbn clusters feature unique chemical bonding, fascinating structures, and special stabilities that can be well rational- ized by aromaticity or antiaromaticity. A deep understanding to their electronic structures is essential and will greatly facilitate the experimental synthesis of new Sbn cluster-based materials.

关键词： aromaticity antiaromaticity Sb clusters chemical bonding

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荆连四物膏对痤疮凹陷性瘢痕点阵激光后创面修复及EGF、bFGF的影响

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深圳中西医结合杂志 2024年第6期34卷 14-17页

作者：何斌苏碧莹林中方广东省中西医结合医院广东佛山528200

目的:观察荆连四物膏对痤疮凹陷性瘢痕点阵CO_(2)激光治疗术后创面修复的临床疗效及其对表皮细胞生长因子(EGF)和碱性成纤维细胞生长因子(bFGF)的影响。方法:选取2022年1.至2023年1.在广东省中西医结合医院诊治的80例痤疮凹陷性瘢痕患... 详细信息

目的:观察荆连四物膏对痤疮凹陷性瘢痕点阵CO_(2)激光治疗术后创面修复的临床疗效及其对表皮细胞生长因子(EGF)和碱性成纤维细胞生长因子(bFGF)的影响。方法:选取2022年1.至2023年1.在广东省中西医结合医院诊治的80例痤疮凹陷性瘢痕患者,随机分为观察组和对照组,每组40例。两组患者均进行点阵CO_(2)激光术治疗,观察组患者用荆连四物膏外敷创面,对照组患者用湿润烧伤膏外敷创面,疗程为3个月。比较治疗后两组患者疼痛持续时间、创面完全愈合时间、视觉模拟评分法(VAS)评分、皮肤屏障功能相关指标、生活质量评分、血清EGF和bFGF水平。结果:观察组患者VAS评分低于对照组,患者疼痛持续时间、创面愈合时间均短于对照组,差异具有统计学意义(P<0.05);治疗后,观察组患者皮肤含水量高于对照组,经皮水分丢失、皮肤油脂含量均低于对照组,差异具有统计学意义(P<0.05);治疗后,观察组患者自我感知、情感功能和社会功能评分均高于对照组,差异具有统计学意义(P<0.05);治疗后,观察组患者血清EGF和bFGF水平均高于对照组,差异具有统计学意义(P<0.05)。结论:荆连四物膏外用能够促进激光术后创面愈合,可能与上调血清EGF、FbGF等生长因子水平有关。

关键词：痤疮凹陷性瘢痕荆连四物膏湿润烧伤膏

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在职体检人群糖尿病流行情况及危险因素分析

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糖尿病新世界 2024年第14期27卷 25-29页

作者：黄素琼李玲张颖周仲芳西南医科大学附属中医医院治未病体检中心四川泸州646000

目的了解在职人群糖尿病的流行情况并进行相关危险因素分析,为糖尿病预防和治疗提供参考依据。方法选取2022年3—1.月西南医科大学附属中医医院的4 342名在职体检人群为研究对象,通过问卷调查和生化检测收集体检者的一般情况(血压、... 详细信息

目的了解在职人群糖尿病的流行情况并进行相关危险因素分析,为糖尿病预防和治疗提供参考依据。方法选取2022年3—1.月西南医科大学附属中医医院的4 342名在职体检人群为研究对象,通过问卷调查和生化检测收集体检者的一般情况(血压、身高、体重等)、病史(高血压、糖尿病)、生活特点、血脂、血糖等指标,对在职体检人群糖尿病发生的相关因素进行Logistic回归分析。结果纳入研究对象4 342人中糖尿病患病人数为284人,糖尿病检出率为6.54%。单因素分析显示年龄、运动缺乏、睡眠时间、膳食情况、高血压、血脂异常、体重指数及中心性肥胖与糖尿病相关(P均1.773~3.056)、血脂异常(OR=3.235,95%CI:2.31.~4.521.、年龄≥40岁(OR=5.1.3,95%CI:3.265~8.1.1.、超重/肥胖(OR=2.91.,95%CI:2.053~4.1.0)、中心性肥胖(OR=1.797,95%CI:1.31.~2.453)、运动缺乏(OR=1.952,95%CI:1.481.2.572),膳食情况较差(OR=4.901.95%CI:1.1.7~20.232)为糖尿病发生的危险因素。结论高血压、血脂异常、年龄≥40岁、超重/肥胖、中心性肥胖、运动缺乏、膳食情况差为糖尿病发生的危险因素,可以通过改善以上因素加强对糖尿病的防控与管理。

关键词：体检在职人员糖尿病流行病学调查

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Absorption, fluorescence and resonance Rayleigh scattering spectral characteristics of interaction of gold nanoparticle with safranine T

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Science China Chemistry 2005年第3期48卷 216-226页

作者： HE Youqiu LIU Shaopu LIU Qin LIU zhongfang HU Xiaoli Chemistry and Chemical Engineering College Southwest China Normal University Chongqing 400715 China Chemistry and Chemical Engineering College Southwest China Normal University Chongqing 400715 China Chemistry and Chemical Engineering College Southwest China Normal University Chongqing 400715 China Chemistry and Chemical Engineering College Southwest China Normal University Chongqing 400715 China Chemistry and Chemical Engineering College Southwest China Normal University Chongqing 400715 China

The interaction between gold nanoparticle and safranine T (ST) has been studied with resonance Rayleigh scattering (RRS) spectra, absorption and fluorescence spectra. In the pH 5 solution, citrate [(H2L)2?] self-assembles on the surface of positively-charged gold nanopar-ticle, which results in the [(Au)n(H2L)m]x? complex. In other words, one of carboxylate oxygens in (H2L)2? moves inward and combines with gold nanoparticle. The other carboxylate oxygens moves outward to form a supermolecular complex anion with x negative charges. Then by virtue of electrostatic attraction, hydrophobic force and charge transfer action, the complex anion binds with ST cation to form a new ion-association complex. Here (H2L)2? acts as a bridge. The forma-tion of the complex results in the significant enhancement of RRS intensity, the appearance of new RRS spectrum, the red shift of plasma absorption band of gold nanoparticle as well as the decrease in the absorbance and fluorescence quenching for safranine T. In this work, the inter-action between gold nanoparticle and ST on the RRS, absorption and fluorescence spectra has been investigated. The reason why RRS intensity increases greatly and the reaction mechanism have been inquired. The results show that RRS spectra can not only be used to study nanopar-ticle and reaction product, but also are a sensitive means to characterize and detect nanoparti-cles.

关键词： gold nanoparticle, resonance Rayleigh scattering spectra, fluorescence quenching, absorption spectra, safranine T.

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Frontiers of Environmental Science & Engineering 2018年第2期12卷 127-137页

作者： Mengqian Lu Bin-LeLin Kazuya Inoue zhongfang Lei Zhenya Zhang Kiyotaka Tsunemi Graduate School of Life and Environmental Sciences University of Tsukuba 1-1-1 Tennodai Tsukuba Ibaraki 305-8577 Japan National Institute of Advanced Industrial Science and Technology 16-1 Onogawa Tsukuba lbaraki 305-8569 Japan

Ammonia has emerged as a promising hydrogen carrier with applications as an energy source in recent years. However, in addition to being toxic, gaseous ammonia is a precursor of secondary inorganic aerosols. The concentration of ambient fine particulate matter （PM2.5） is intrinsically connected to public health. In this study, PM2.5-related health impacts of utilizing ammonia-hydrogen energy in Kanto Region, Japan, were investigated. It was assumed that 20% of the electricity consumption in Kanto Region, the most populated area in Japan, was supplied by mnmonia-hydrogen energy. The PM2.5 resulted from incomplete ammonia decomposition was simulated by a chemical transport model： ADMER-PRO （modified version）. Based on the incremental PM2.5 concentration, health impacts on the elderly （individuals over 65 years old） were quantitatively evaluated. The ammonia emission in this scenario increased PM2 s by 1..7% （0.1. μg·m-3.y-1. in winter and 3.5% （0.08 μg · m-3.y-1. in summer, resulting in 351.premature deaths per year. This study suggests that cost- effective emissions control or treatment and appropriate land planning should be considered to reduce the associated health impacts of this type of energy generation. In addition, further in-depth research, including cost-benefit analysis and security standards, is needed.

关键词： Ammonia emissionsEnergy carrierHydrogen energyFine particulate mattersAtmospheric modelingPremature death

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基于苹果叶片与药液界面特性的果园农药精准喷雾量计算模型的建立

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农药学学报 2024年第3期26卷 583-593页

作者：张鹏九王翔范仁俊刘中芳禾丽菲杨静高越山西农业大学植物保护学院农业有害生物综合治理山西省重点实验室太原030031

为保证果树精准施药,减少药剂流失,本研究结合果树叶片冠层参数、界面性质和果园农药去向,建立了苹果园农药精准喷雾量的计算模型,以指导不同植保机械在不同果园栽种模式下的农药喷施方式。选取不同发育期‘富士’苹果叶片为研究对象,... 详细信息

为保证果树精准施药,减少药剂流失,本研究结合果树叶片冠层参数、界面性质和果园农药去向,建立了苹果园农药精准喷雾量的计算模型,以指导不同植保机械在不同果园栽种模式下的农药喷施方式。选取不同发育期‘富士’苹果叶片为研究对象,通过测定叶片表观表面自由能与冠层参数(叶面积指数、平均叶倾角),建立药液表面张力与苹果叶片最大持液量之间的关系,基于叶片最大持液量与果树冠层参数计算全树最大持液量,结合苹果园农药去向,建立了苹果园农药精准喷雾量计算模型。以担架柱塞泵式机动喷雾机在乔化稀植苹果园和风送式自走履带喷雾机在矮砧密植苹果园的施药行为为例,验证所建模型的实用性。结果表明:乔化稀植苹果园于苹果生长前期,使用担架柱塞泵式机动喷雾机,按计算用药液量施药,较常规用药液量节省药液量37.40%,生长后期则节省药液量1..75%。矮砧密植苹果园于苹果生长后期,使用风送式自走履带喷雾机,按计算用药液量施药,较常规用药液量节省药液量28%。且防效与常规药液用量无显著性差异。此模型将苹果叶片界面性质与施药器械相结合,不仅可根据果园实际情况对果园施药量进行精准计算,还可对果园某一时期农药药液的适用性进行评价,并基于实际情况调控药液量、喷雾机械参数,从而达到精准施药的目的。

关键词：苹果树表观表面自由能叶片持液量冠层参数精准施药量计算模型

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老年非小细胞肺癌病人术后持续性肺不张的风险模型构建及预测能力验证

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循证护理 2024年第7期10卷 1313-1318页

作者：王菲菲孙中芳李洁山东国欣颐养集团枣庄医院山东277101

目的:探讨老年非小细胞肺癌病人(NSCLC)根治术后持续性肺不张的影响因素,建立预测模型,并验证其敏感性与可靠性。方法:选取我院2020年1.—2022年1.月收治的老年NSCLC根治手术病人1.0例,根据术后是否出现持续性肺不张分为发生组(n=1.)... 详细信息

目的:探讨老年非小细胞肺癌病人(NSCLC)根治术后持续性肺不张的影响因素,建立预测模型,并验证其敏感性与可靠性。方法:选取我院2020年1.—2022年1.月收治的老年NSCLC根治手术病人1.0例,根据术后是否出现持续性肺不张分为发生组(n=1.)和未发生组(n=98),通过单因素分析、多因素Logistic回归分析建立老年NSCLC根治术后持续性肺不张的预测模型。编制校准曲线确定模型的拟合度,通过时间相关的受试者工作特征曲线(ROC)、决策曲线(DCA)评价模型预测效果。结果:单因素分析结果显示,术前全血白细胞水平、手术时间、麻醉方式、年龄、气管插管、术后体力状况评分、术后疼痛视觉模拟(VAS)评分、慢性阻塞性肺疾病、美国麻醉医师协会(ASA)分级、吸烟史均是老年NSCLC根治术后持续性肺不张的影响因素(P1.95%CI(0.81.,0934)],敏感度为73.72%,特异度为84.42%;DCA显示随着阈值概率增加,该模型净获益水平降低。结论:构建的预测模型在老年NSCLC根治术后持续性肺不张具有良好的预测效果,可为医护人员识别术后持续性肺不张的高危人群并积极展开相应防治措施提供依据。

关键词：非小细胞肺癌肺不张预测模型根治手术影响因素

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Study on the interaction between palladium(II)-chlorpromazine hydrochloride and sodium tungstate by the resonance Rayleigh scattering, second-order scattering and frequency doubling scattering spectra and its analytical application

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Science China Chemistry 2011年第3期54卷 506-514页

作者： CHEN PeiLi LIU ShaoPu LIU zhongfang HU XiaoLi LI CuiXia Key Laboratory on Luminescence and Real-Time Analysis Ministry of EducationSchool of Chemistry and Chemical EngineeringSouthwest UniversityChongqing 400715China

The interaction between palladium(II)-chlorpromazine hydrochloride and sodium tungstate was investigated by ultravioletvisible absorption,resonance Rayleigh scattering(RRS),second-order scattering(SOS)and frequency doubling scattering (FDS)*** pH 5.3 Britton-Robinson(BR)buffer medium,chlorpromazine hydrochloride(CPZ)reacted with Pd(II) to form 2:1.cationic chelate,which further reacted with Na2WO4 to form a 1.1.ternary ion-association complex ([Pd(CPZ)2]·WO4).As a result,the signal intensities of RRS,SOS and FDS were enhanced greatly,and the enhancements of scattering were proportional to the CPZ concentration in a certain *** maximum wavelengths were located at 31. nm, 570 nm and 391.nm,respectively and the detection limits(3)were 1.6 ng/mL(RRS method),3.2 ng/mL(SOS method)and 5.6 ng/mL(FDS method).The optimum reaction conditions,the influences of coexisting substances and analytical application were mainly investigated by RRS method due to its highest sensitivity.A highly sensitive,simple,rapid and new method had been proposed to determine CPZ in the pharmaceutical form and residue of CPZ in *** addition,the Gibbs free energy change(△Gf)of ion-association reaction was computed by using B3LYP/3-21.*/LanL2dz *** formation of ion-association and the reasons for the enhancement of RRS were also discussed.

关键词： resonance Rayleigh scattering second-order scattering frequency doubling scattering chlorpromazine hydrochloride palladium(II) Na2WO4

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N-heterocyclic carbene as a promising metal-free electrocatalyst with high efficiency for nitrogen reduction to ammonia

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Journal of Energy Chemistry 2020年第7期29卷 78-86,I0003页

作者： Hongyan Li Le Yang Zhongxu Wang Peng Jin Jingxiang Zhao zhongfang Chen College of Chemistry and Chemical Engineering and Key Laboratory of Photonic and Electronic Bandgap MaterialsMinistry of EducationHarbin Normal UniversityHarbin 150025HeilongjiangChina School of Materials Science and Engineering Hebei University of TechnologyTianjin 300130China Department of Chemistry University of Puerto RicoRio Piedras CampusSan JuanPR 00931USA

Electrocatalytic nitrogen reduction reaction(NRR)at ambient conditions holds great promise for sustainably synthesizing ammonia(NH3),while developing highly-efficient,long-term stable,and inexpensive catalysts to activate the inert N≡N bond is a key scientific *** this work,on the basis of the concept"N-heterocyclic carbenes(NHCs)",we propose a carbon decorated graphitic-carbon nitride(C/g-C3N4)as novel metal-free NRR electrocatalyst by means of density functional theory(DFT)*** results reveal that the introduced C atom in g-C3N4 surface can be regarded as NHCs and catalytic sites for activating N≡N bond,and are stabilized by the g-C3N4 substrate due to sterically disfavored ***,this NHCs-based heterogeneous catalysis can efficiently reduce the activated N2 molecule to NH3 with a low overpotential of 0.05 V via an enzymatic *** work is the first report of NHCs-based electrocatalyst for N2 fixation,thus opening an alternative avenue for advancing sustainable NH3 production.

关键词： Nitrogen reduction reaction N-heterocyclic carbenes Overpotential Density functional theory

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