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Initial clinical evaluation of chest digital tomosynthesis in adult patients with COVID-19 pneumonia

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中华医学杂志(英文版) 2024年第18期137卷 2239-2241页

作者： li zhanxia Wu Xiuhua zhang Guobin Wu Dianliang zhang Yunjiao Wang Chengji Zou Lumin Gu Xiaohua Ren Tao Department of Pulmonary and Critical Care Medicine Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai China Department of Radiology Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai China School of Mechanical Engineering Shanghai Jiao Tong University Shanghai China Shanghai Laboratory Animal Research Center Shanghai China E-COM Technology limited Beijing China

H_(2)O_(2)纳米雾化结合微孔保鲜袋对新疆蟠枣贮藏品质的影响

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食品研究与开发 2024年第15期45卷 73-79页

作者：郭慧静刘战霞李斌斌张有成金新文赵志永新疆农垦科学院农产品加工研究所新疆石河子832000 图木舒克市绿糖心冬枣种植专业合作社新疆图木舒克844000

为保持蟠枣果实采后贮藏品质和商品性,以新疆蟠枣为试材,考察H_(2)O_(2)纳米雾化结合微孔保鲜袋处理对蟠枣贮藏品质的影响。结果表明,未使用微孔保鲜袋包装处理的蟠枣在贮藏20 d后出现明显的失水皱缩,品质显著下降;微孔保鲜袋包装结合1%...

为保持蟠枣果实采后贮藏品质和商品性,以新疆蟠枣为试材,考察H_(2)O_(2)纳米雾化结合微孔保鲜袋处理对蟠枣贮藏品质的影响。结果表明,未使用微孔保鲜袋包装处理的蟠枣在贮藏20 d后出现明显的失水皱缩,品质显著下降;微孔保鲜袋包装结合1%H_(2)O_(2)纳米雾化处理保鲜效果显著优于仅使用微孔保鲜袋,可显著抑制果实失水软化、红变,延缓蟠枣果实中可溶性固形物(total soluble solid,TSS)、维生素C(vitamin C,VC)等物质的损失速率,维持相对较高的抗氧化酶活性。通过相关性分析表明,果实品质指标与抗氧化酶活性之间显著相关。因此,微孔保鲜袋包装结合1%H_(2)O_(2)纳米雾化处理是一种应用于蟠枣采后贮藏的有效保鲜方法。

关键词：新疆蟠枣 H_(2)O_(2)纳米雾化微孔保鲜袋抗氧化酶相关性分析

GFAAS中理论原子化效率与原子化温度的关系的研究

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光谱学与光谱分析 2000年第1期20卷 76-78页

作者：李攻科杨秀环张展霞中山大学化学系广州510275

本文在有效地控制和消除基体干扰的基础上 ,探讨了Ag ,As,Au ,Bi,Cd ,Co ,Cr,Cu ,Fe ,Ga,Hg ,Mn ,Mo ,Ni,Sb ,Pb和V元素的理论原子化效率与原子化温度的关系。研究表明 :元素的理论原子化效率是原子化温度的函数 ,在一定的原子化温度范...

本文在有效地控制和消除基体干扰的基础上 ,探讨了Ag ,As,Au ,Bi,Cd ,Co ,Cr,Cu ,Fe ,Ga,Hg ,Mn ,Mo ,Ni,Sb ,Pb和V元素的理论原子化效率与原子化温度的关系。研究表明 :元素的理论原子化效率是原子化温度的函数 ,在一定的原子化温度范围内 ,理论原子化效率与原子化温度呈线性递增关系 ,对研究的十八个元素其线性的相关系数在 0 994 0～ 0 9993之间 ,且斜率大部分在 0 0 6～ 0 0 7之间 ,说明在一定的原子化温度范围内 ,理论原子化效率随原子化温度变化的斜率是相近的。

关键词：原子吸收光谱法原子化温度原子化效率

Progress on the development of DNA-mediated metal nanomaterials for environmental and biological analysis

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Chinese Chemical Letters 2019年第2期30卷 285-291页

作者： Jingtai Fu Zhuomin zhang gongke li School of Chemistry Sun Yat-sen University

Nowadays, DNA-mediated metal nanomaterials have received more and more attention due to their distinctive properties of easy synthesis, high stability and good biocompatibility. As a kind of efficient template to mediate the precise synthesis of metal nanomaterials, DNA can not only increase their recognition and biocompatibility, but also precisely control their morphology, structure and further analytical performance. DNA-mediated metal nanomaterials as ultrasensitive and selective probes have unique advantages for in situ rapid analysis of targets in complex samples. Herein, we reviewed the recent progress on synthesis strategies, morphologies, specific properties of DNA-mediated metal nanomaterials including nanoparticles and nanoclusters. Moreover, the applications of DNA-mediated metal nanomaterials to environmental and biological analysis were also summarized. Finally, the developing prospect of DNA-mediated metal nanomaterials in analytical chemistry was discussed and proposed.

关键词： DNA-mediated metal nanomaterials Metal nanoparticles Metal nanoclusters Environmental analysis Biological analysis

Fabrication of bimetallic nanoparticles modified hollow nanoporous carbons derived from covalent organic framework for efficient degradation of 2,4-dichlorophenol

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Chinese Chemical Letters 2021年第8期32卷 2529-2533页

作者： Yanshu zhang gongke li Yufei Hu School of Chemistry Sun Yat-sen UniversityGuangzhou 510275China

Bimetallic nanoparticles modified hollow-structured nanoporous carbons(NPCs) have been fabricated via a convenient one-step carbonizing strategy derived from covalent organic *** Pd/Fe/NPCs,Pt/Fe/NPCs and Rh/Fe/NPCs were obtained and can be used as Fenton-like catalysts with good stability and *** catalytic activity was evaluated by the degradation of2,4-dichlorophenl(2,4-DCP).These fabricated bimetallic catalysts exhibited much higher catalytic activity than Fe/NPCs at room *** enhancement of catalytic ability was benefited from synergetic catalytic effect of bimetallic nanoparticles and accelerated mass transfer of hollow ***,the enhanced catalytic mechanism of bimetallic catalysts was studied in detail and the reasonable reaction pathway was ***,the bimetallic catalysts were successfully used for degradation of 2,4-DCP in actual industrial wastewater and the removal efficiency could reach 74.3%within 120 min,which demonstrated the promising potential application of bimetallic catalysts in the removal of pollutants in environment.

关键词： Covalent organic framework Hollow structure N-doped carbon Bimetallic nanoparticles 2 4-Dichlorophenol Degradation

Magnetic Ti_(3)C_(2)T_(x)/Fe_(3)O_(4)/Ag substrate for rapid quantification of trace sulfonamides in aquatic products by surface enhanced Raman spectroscopy

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Chinese Chemical Letters 2022年第8期33卷 3853-3858页

作者： Zhongning Yu Lu Huang Zhuomin zhang gongke li School of Chemistry Sun Yat-sen UniversityGuangzhou 510275China

Surface-enhanced Raman scattering(SERS)spectroscopy has been employed as a rapid analysis technology for food security inspection ***,it is still a great challenge to rapidly quantify multiple trace antibiotics potentially abused in aquaculture *** this work,a magnetic Ti_(3)C_(2)T_(x)/Fe_(3)O_(4)/Ag substrate was prepared for the development of a reliable rapid SERS quantification method for multiple trace sulfonamides in aquatic *** magnetic substrate had good uniformity,reproducibility,stability and SERS ***,this substrate could integrate the magnetic separation-enrichment and matrix clean-up without cross contamination,which endowed it with good selectivity and antiinterference capability during real sample *** electromagnetic enhancement and chemical enhancement mechanism of this magnetic substrate were studied in detail to reveal its good separationenrichment performance and SERS ***,a rapid SERS quantification method was established and practically applied for trace phthalic sulfathiazole(PST)and silver sulfadiazine(SSD)in aquatic products by using Ti_(3)C_(2)T_(x)/Fe_(3)O_(4)/Ag magnetic *** PST and SSD could be actually detected and quantified as 55.9μg/kg and 64.0μg/kg in aquatic products,*** recoveries of 83.9%-116%with relative standard deviations(RSDs)of 0.5%-3.2%for PST and 80.2%-102%with RSDs of 1.3%-5.8%for SSD were *** work proposed an efficient and reliable method for rapid quantification of trace multiple sulfonamides in complex aquatic samples during food security inspection.

关键词： Magnetic substrate Ti_(3)C_(2)T_(x)/Fe_(3)O_(4)/Ag Rapid SERS quantification Trace sulfonamides Aquatic samples

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石墨炉原子吸收光谱法绝对分析

分析测试学报 1993年第2期12卷 1-7页

作者：张展霞李攻科中山大学化学系

石墨炉原子吸收光谱法(GFAAS)绝对分析近年来得到了较显著的发展,其主要原因是由于GFAAS中基体干扰问题获得了解决;用以描述GFAAS性能的特征质量MOE值相对稳定;以及用L’vov提出的计算MOT值的式子算出的32个元素的MOT值已比较接近其实验...

石墨炉原子吸收光谱法(GFAAS)绝对分析近年来得到了较显著的发展,其主要原因是由于GFAAS中基体干扰问题获得了解决;用以描述GFAAS性能的特征质量MOE值相对稳定;以及用L’vov提出的计算MOT值的式子算出的32个元素的MOT值已比较接近其实验MOE值。大量数据表明完全有可能实现GFAAS绝对分析。

关键词：石墨炉原子吸收光谱绝对分析

ICP-AES直接测定土壤、沉积物中常、微量元素的光谱干扰和校正方法研究

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光谱学与光谱分析 2000年第4期20卷 501-506页

作者：李芳杨秀环唐宝英刘洪涛张展霞中山大学化学系广州510275

本文研究了感耦等离子体原子发射光谱 (ICP AES)法直接测定土壤、沉积物中常、微量元素的光谱干扰 ,以及用多元光谱拟合 (MSF)校正的方法。讨论了积分时间及谱线漂移对MSF法的影响。比较了离峰扣背景法与MSF法的效果 ,对水系沉积物GBW 0...

本文研究了感耦等离子体原子发射光谱 (ICP AES)法直接测定土壤、沉积物中常、微量元素的光谱干扰 ,以及用多元光谱拟合 (MSF)校正的方法。讨论了积分时间及谱线漂移对MSF法的影响。比较了离峰扣背景法与MSF法的效果 ,对水系沉积物GBW 0 73 0 6测定结果表明 ,MSF法得出的结果更接近推荐值 ,且其检出限及相对标准偏差比离峰扣背景法分别改善了 1 3～ 9 0倍和 1 1～ 4 9倍。

关键词：土壤沉积物光谱干扰 ICP-AES 元素测定

仪器分析实验课程建设:表面增强拉曼光谱快速分析食用色素

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大学化学 2024年第2期39卷 133-139页

作者：张卓旻黄韩冰林亮秋刘景松李攻科中山大学化学学院广州510006

表面增强拉曼光谱(Surface-enhanced Raman spectroscopy,SERS)由于具有检测速度快、仪器便携性好、灵敏度高及谱图指纹特征丰富等特点,近年来作为一种重要的仪器分析方法已逐步应用于食品安全分析。因此,我们结合前期科研基础,科教融合...

表面增强拉曼光谱(Surface-enhanced Raman spectroscopy,SERS)由于具有检测速度快、仪器便携性好、灵敏度高及谱图指纹特征丰富等特点,近年来作为一种重要的仪器分析方法已逐步应用于食品安全分析。因此,我们结合前期科研基础,科教融合,设计了“表面增强拉曼光谱快速分析食用色素”实验。学生通过增强基底制备、SERS检测条件的优化、SERS快速分析方法的建立及应用等内容的训练,可充分学习SERS快速分析方法的实验技能,并收获相关的前沿知识,培养实验创新能力。

关键词：仪器分析实验表面增强拉曼光谱快速分析食用色素

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