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基于牛血清白蛋白功能化金纳米棒的荧光探针测定Hg^(2+)

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化学通报 2021年第3期84卷 261-266,193页

作者：李瑞军朱长龙季一兵中国药科大学理学院分析化学教研室南京211198

建立了一种以牛血清白蛋白功能化的金纳米棒(BSA-Cys-GNRs)为荧光探针检测Hg^(2+)的新方法。以半胱氨酸作为连接臂成功将牛血清白蛋白修饰在金纳米棒表面,通过紫外可见吸收光谱、荧光光谱、红外光谱和荧光倒置显微镜等多种分析方法对材... 详细信息

建立了一种以牛血清白蛋白功能化的金纳米棒(BSA-Cys-GNRs)为荧光探针检测Hg^(2+)的新方法。以半胱氨酸作为连接臂成功将牛血清白蛋白修饰在金纳米棒表面,通过紫外可见吸收光谱、荧光光谱、红外光谱和荧光倒置显微镜等多种分析方法对材料进行表征。研究发现,在295nm波长光激发下,BSA-Cys-GNRs探针在338nm显示强荧光,而Hg^(2+)能够有效地猝灭BSA-Cys-GNRs的荧光。对一系列影响猝灭效果的因素进行考察,得出pH 4.0、孵育时间5.0min为最佳检测条件。Mn^(2+)、K^(+)、Ni^(2+)、Na^(+)、Cr^(3+)、Cd^(2+)、Mg^(2+)、Cu^(2+)、Ca^(2+)、Al^(3+)和Zn^(2+)对BSA-Cys-GNRs的荧光信号没有明显的影响。当Hg^(2+)的浓度为0.04444~8.888μmol·L^(-1)时,荧光猝灭效率与Hg^(2+)的浓度之间存在良好的线性关系,检测限为8.08nmol·L^(-1)。将该方法用于环境水样中Hg^(2+)的检测,回收率为98.9%~105.0%。

关键词：金纳米棒荧光探针 Hg^(2+)

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活性炭填充对聚砜超滤膜性能的影响

化工新型材料 2012年第5期40卷 145-147页

作者：廖信侨季一兵陈建秋中国药科大学分析化学教研室环境科学教研室南京210009

采用相转化法制备聚砜(PSF)超滤膜,通过正交实验确定了较优的制膜条件,并用活性炭填充制备了共混的聚砜超滤膜,考察了活性炭加入量对膜的水通量、牛血清白蛋白(BSA)截留率及孔隙率的影响,以及操作条件对填充膜性能的影响。结果表明,最... 详细信息

采用相转化法制备聚砜(PSF)超滤膜,通过正交实验确定了较优的制膜条件,并用活性炭填充制备了共混的聚砜超滤膜,考察了活性炭加入量对膜的水通量、牛血清白蛋白(BSA)截留率及孔隙率的影响,以及操作条件对填充膜性能的影响。结果表明,最优化制膜条件为:添加剂聚乙二醇(PEG-400)含量为8%,蒸发时间为60s,纯水作为凝固浴,在此条件下制得的膜水通量达到212.6L/(m2.h),BSA截留率为84.1%。活性炭填充对膜水通量和截留率有明显影响,在活性炭含量为0.5%～1.5%时,膜通量随操作压力增大而增大,而截留率变化不大。

关键词：超滤膜活性炭填充膜通量截留率

Brain age estimation:premise,promise,and problems

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Neural Regeneration Research 2025年第8期20卷 2313-2314页

作者： Jarrad Perron ji Hyun Ko Graduate Program in Biomedical Engineering Price Faculty of EngineeringUniversity of ManitobaWinnipegMBCanada PrairieNeuro Research Centre Kleysen Institute for Advanced MedicineHealth Sciences CentreWinnipegMBCanada Department of Human Anatomy and Cell Science Rady Faculty of Health SciencesUniversity of ManitobaWinnipegMBCanada

Premise:The com bined effects of modern healthcare practices which prolong lifespan and declining birthrates have created unprecedented changes in age demographics worldwide that are especially pronounced in Japan,South Korea,Europe,and North *** old age is the most significant predictor of dementia,global healthcare systems must rise to the challenge of providing care for those with neurodegenerative disorders.

关键词： estimation providing birth

Manufacture the conducting polymer with light

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Science China Chemistry 2025年第1期68卷 8-9页

作者： Yang Li Tianyu Li Yan ji Baoguang Liu College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology) Nanjing University of Posts & Telecommunications

Poly(3,4-ethylenedioxythiophene) (PEDOT), heralded as the “king” of conducting polymers, is esteemed in bioelectronics for its mixed electronic and ionic conductivity, mechanical properties compatible with biological tissues, tunable healing ability and stability in diverse environments [1]. Based on additive manufacturing of three-dimensional structures,PEDOT realizes the implementation in the efficient production of flexible bioelectronics, the construction of intricate electrode-neural implantations, and the development of smart brain-computer-interfaces [2].

关键词：

新型聚砜手性膜的制备及其在色氨酸手性拆分中的应用

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中国药科大学学报 2017年第1期48卷 53-59页

作者：季一兵段飞飞郝单单陈建秋中国药科大学分析化学教研室南京210009

为了研制新型聚砜手性膜,采用十二酰氯与β-环糊精反应,制备一种新型的十二酰基-β-环糊精,然后将其添加到聚砜铸膜液中,采用浸入沉淀相转化法制备十二酰基-β-环糊精/聚砜手性膜。分别考察十二酰基-β-环糊精的添加量对膜的纯水通量、... 详细信息

为了研制新型聚砜手性膜,采用十二酰氯与β-环糊精反应,制备一种新型的十二酰基-β-环糊精,然后将其添加到聚砜铸膜液中,采用浸入沉淀相转化法制备十二酰基-β-环糊精/聚砜手性膜。分别考察十二酰基-β-环糊精的添加量对膜的纯水通量、牛血清白蛋白(BSA)截留率和手性拆分性能的影响。膜的形态采用扫描电子显微镜进行表征。实验结果表明,随着十二酰基-β-环糊精含量的增加,膜的孔径发生变化,膜的支撑层中出现指状孔结构。因此,膜的水通量显著上升而截留率略有降低。当十二酰基-β-环糊精的添加量在2%~3.5%范围内,随着十二酰基-β-环糊精添加量的增加,过滤次数相同时,对映体过量百分数(ee,%)逐渐增加。利用所制备的十二酰基-β-环糊精聚砜/手性膜,采用多级过滤装置最终实现了外消旋色氨酸的完全分离。

关键词：十二酰基-β-环糊精聚砜膜色氨酸手性分离

十二酰基-β-环糊精聚砜共混膜的制备及其在色氨酸手性拆分中的应用

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中国医药工业杂志 2021年第1期52卷 112-119页

作者：白小平罗欢陈建秋季一兵中国药科大学理学院教育部药物质量与安全预警重点实验室江苏南京210009

本研究以十二酰基-β-环糊精为手性选择剂,采用浸入沉淀相转化法制备十二酰基-β-环糊精聚砜共混膜,对膜的稳定性和性能进行考察,并将其用于色氨酸外消旋体的手性拆分。同时建立能够拆分色氨酸外消旋体的手性配体交换液相色谱法,并进行... 详细信息

本研究以十二酰基-β-环糊精为手性选择剂,采用浸入沉淀相转化法制备十二酰基-β-环糊精聚砜共混膜,对膜的稳定性和性能进行考察,并将其用于色氨酸外消旋体的手性拆分。同时建立能够拆分色氨酸外消旋体的手性配体交换液相色谱法,并进行方法学考察,用于评价共混膜的手性拆分能力。采用BaseLine C18柱(4.6 mm×250 mm,5μm),流动相为水相(0.375 mmol/L L-苯丙氨酸和0.075 mmol/L硫酸铜溶液,冰醋酸调至pH 4.3)∶甲醇(80∶20),检测波长为278 nm,柱温为35℃,流速为1 ml/min。建立的方法为手性拆分色氨酸对映体提供了参考。

关键词：色氨酸手性配体交换手性拆分共混膜

Magneto‑Dielectric Synergy and Multiscale Hierarchical Structure Design Enable Flexible Multipurpose Microwave Absorption and Infrared Stealth Compatibility

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Nano-Micro Letters 2025年第2期17卷 401-416页

作者： Chen Li Leilei Liang Baoshan Zhang Yi Yang Guangbin ji School of Electronic Science and Engineering Nanjing UniversityNanjing 210093People’s Republic of China College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 210016People’s Republic of China

Developing advanced stealth devices to cope with radar-infrared(IR)fusion detection and diverse application scenarios is increasingly demanded,which faces significant challenges due to conflicting microwave and IR cloaking mechanisms and functional integration ***,we propose a multiscale hierarchical structure design,integrating wrinkled MXene IR shielding layer and flexible Fe_(3)O_(4)@C/PDMS microwave absorption *** top wrinkled MXene layer induces the intensive diffuse reflection effect,shielding IR radiation signals while allowing microwave to pass ***,the permeable microwaves are assimilated into the bottom Fe_(3)O_(4)@C/PDMS layer via strong magneto-electric *** theoretical and experimental optimization,the assembled stealth devices realize a near-perfect stealth capability in both X-band(8–12 GHz)and long-wave infrared(8–14μm)wavelength ***,it delivers a radar cross-section reduction of−20 dB m^(2),a large apparent temperature modulation range(ΔT=70℃),and a low average IR emissivity of ***,the optimal device demonstrates exceptional curved surface conformability,self-cleaning capability(contact angle≈129°),and abrasion resistance(recovery time≈5 s).This design strategy promotes the development of multispectral stealth technology and reinforces its applicability and durability in complex and hostile environments.

关键词： Microwave absorption Radar-infrared compatible stealth Wrinkled MXene Magneto-dielectric synergy Multifunction

Exploring the potential of extrachromosomal DNA as a novel oncogenic driver

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Science China Life Sciences 2025年第1期68卷 144-157页

作者： Huanbo Zhu Longtao Huangfu Junbing Chen jiafu ji Xiaofang Xing Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing) Division of Gastrointestinal Cancer Translational Research LaboratoryPeking University Cancer Hospital & Institute Department of Gastrointestinal Cancer Center Peking University Cancer Hospital & Institute Department of Liver Surgery & Transplantation Liver Cancer InstituteZhongshan HospitalFudan University Key Laboratory of Carcinogenesis and Cancer Invasion Ministry of Education State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers Beijing Key Laboratory of Carcinogenesis and Translational ResearchDivision of Gastrointestinal Cancer Translational Research LaboratoryPeking University Cancer Hospital & Institute

Extrachromosomal DNA(ecDNA) is a form of circular DNA mostly found in tumor cells. Unlike the typical chromosomal DNA, ecDNA is circular, self-replicating, and carries complete or partial gene fragments. Although ecDNA occurrence remains a rare event in cancer, recent studies have shown that oncogene amplification on ecDNA is widespread throughout many types of cancer, implying that ecDNA plays a central role in accelerating tumor evolution. ecDNA has also been associated with increased tumor mutation burden, chromosomal instability, and even tumor microenvironment remodeling. ecDNA may be crucial in influencing tumor heterogeneity, drug sensitivity,oncogenic senescence, and tumor immunogenicity, leading to a worsening prognosis for tumor patients. In this way, several clinical trials have been conducted to investigate the importance of ecDNA in clinical treatment. In this review, we summarize the biogenesis, characteristics, and current research methods of ecDNA, discuss the vital role of ecDNA-caused tumor heterogeneity in cancers, and highlight the potential role of ecDNA in cancer therapy.

关键词： extrachromosomal DNA cancer therapy tumor heterogeneity drug resistance tumor evolution

Mechanism Study on the Effect of Retarder on Polyurethane Setting Time Based on Molecular Simulation

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 224-231页

作者： WU Yuxuan XU Wenyuan YU Tianlai ji Yongcheng School of Civil Engineering Northeast Forestry UniversityHarbin 150040China

This study identified castor oil and phosphate ester as effective retarders through setting time,tensile,and flexural tests,and determined their optimal *** mechanism by which phosphate ester affects the setting time of polyurethane was further investigated using molecular dynamics *** transform infrared spectroscopy was also employed to systematically study the physical and chemical interactions between phosphate esters and polyurethane *** results demonstrate that a 1%concentration of phosphate ester provides the most effective retarding effect with minimal impact on the strength of *** phosphate ester is added to the B component of the two-component polyurethane system,its interaction energy with component A decreases,as do the diffusion coefficient and aggregation degree of component B on the surface of component *** reduction in interaction slows the setting ***,the addition of phosphate ester to polyurethane leads to the disappearance or weakening of functional groups,indicating competitive interactions within the phosphate ester components that inhibit the reaction rate.

关键词： polyurethane retarder setting time molecular dynamics diffusion coefficient