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Supported carbon dots decorated with metallothionein for selective cadmium adsorption and removal

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Chinese Chemical Letters 2015年第12期26卷 1496-1501页

作者： Ting Yang Yi-Kun li ming-li chen Jian-Hua Wang Research Center for Analytical Sciences College of Sciences Northeastern University

Carbon dots are prepared and immobilized onto spherical SiO_2 through a one-step thermal oxidation and then decorated with metallothionein（MT）, a protein with high affinity towards thiophilic metals. The MT-carbon dots composites are characterized by means of FT-IR, SEM and TGA, giving rise to a MT loading amount of 823 μg g^（-1）. The adsorption of cadmium by the composites is a fast process and follows Langmuir model. In comparison with native SiO_2, a 2- and 2.4-folds improvement on the static and dynamic adsorption capacity of the composites for cadmium are obtained, respectively. Moreover,the adsorption efficiency is not affected by the presence of other metals. Finally, the composites are successfully applied for the removal of cadmium in a series of environmental water samples.

关键词： cadmium adsorbent spherical kinetics isotherms sorption breakthrough effluent alkaline sequential

Coordinated organogel templated fabrication of silver/polypyrrole composite nanowires

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Chinese Chemical Letters 2011年第1期22卷 123-126页

作者： Bo Tian li li ming Tang Kai chen Yu Xia Xin Jin Laboratory of Advanced Materials Department of Chemical Engineering Tsinghua University Beijing 100084 China

A new method to fabricate metal/conducting polymer composite nanowires is presented by taking silver/polypyrrole composite nanowires as an example. A silver （D-coordinated organogel as template was prepared firstly, and redox-polymerization of pyrrole took place on the gel fiber, giving product of silver/polypyrrole nanowires. The silver/polypyrrole nanowires were characterized by multiple techniques. This strategy could be carried out in one-step procedure at room temperature, and it proves the utility of coordinated organogels in template synthesis of polymer nanostructures.

关键词： Coordinated organogel Template polymerization Polypyrrole Composite nanowires

Isolation of hemoglobin with metal–organic frameworks Y(BTC)(H_2O)_6

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Chinese Chemical Letters 2015年第12期26卷 1460-1464页

作者： Yang Shu Ying Meng ming-li chen Jian-Hua Wang Research Center for Analytical Sciences College of SciencesNortheastern University Institute of Biological Technology College of Life and Health Sciences Northeastern University

The hierarchical metal-organic frameworks（MOFs）,such as Y（BTC）（H_2O）_6,are prepared with yttrium nitrate and benzene-1,3,5-tricarboxylic acid at room *** product is characterized by Fourier transform infrared（FT-IR）,X-ray diffraction（XRD）,scanning electron microscopy（SEM）and thermogravimetric analysis（TGA）.The Y（BTC）（H_2O）_6 particles are sufficiently rigid for performing solid phase extraction and they exhibit favorable selectivity toward the adsorption of *** adsorption behavior of hemoglobin onto the Y（BTC）（H_2O）_6 fits the Langmuir adsorption model with a theoretical adsorption capacity of 555.6 mg g *** adsorption efficiency of 87.7%for 100μg mL 1hemoglobin in 1 mL sample solution（at pH 6.0）is achieved with 0.40 mg Y（BTC）（H20）6.77.3%of the retained hemoglobin is readily recovered using a 0.5%（m/v）SDS solution as the stripping *** dichroism spectra indicated that the conformation of hemoglobin is maintained during the adsorption-desorption *** MOFs material is applied for the isolation of hemoglobin from human blood and the purity of the obtained hemoglobin is further verified by sodium dodecyl sulfate polyacrylamide gel electrophoresis（SDS-PAGE）.

关键词： hemoglobin BTC H2O hierarchical selectivity nitrate desorption verified dodecyl polyacrylamide

Rational design and structural regulation of near-infrared silver chalcogenide quantum dots

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Nano Research 2024年第12期17卷 10585-10606页

作者： Zhen-Ya liu Wei Zhao li-ming chen Yan-Yan chen Zhi-Gang Wang An-An liu Dai-Wen Pang College of Chemistry School of Medicine and Frontiers Science Center for Cell ResponsesFrontiers Science Centre for New Organic MatterTianjin Key Laboratory of Biosensing and Molecular RecognitionResearch Centre for Analytical SciencesNankai UniversityTianjin 300071China School of Chemical and Environmental Engineering Yancheng Teachers UniversityYancheng 224002China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

Silver chalcogenides(Ag_(2)E;E=S,Se,or Te)quantum dots(QDs)have emerged as promising candidates for near-infrared(NIR)***,their narrow bandgap and small exciton Bohr radius render the optical properties of Ag_(2)E QDs highly sensitive to surface and size ***,the propensity for the formation of silver impurities and their low solubility product constants pose challenges in their controllable *** advancements have deepened our understanding of the relationship between the multi-hierarchical structure of Ag_(2)E QDs and their optical *** rational design and precise structural regulation,the performance of Ag_(2)E QDs has been significantly enhanced across various *** review provides a comprehensive overview of historical and current progress in the synthesis and structural regulation of Ag_(2)E QDs,encompassing aspects such as size control,crystal structure engineering,and surface/interface ***,it discusses outstanding challenges and potential opportunities in this *** aim of this review is to promote the custom synthesis of Ag_(2)E QDs for applications in biological imaging,and optoelectronics applications.

关键词： silver chalcogenides structural regulation size control crystal engineering surface and interface regulation

Isolation and Characterization of GmSTY1,a Novel Gene Encoding a Dual-Specificity Protein Kinase in Soybean（ Glycme max L.）

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Journal of Integrative Plant Biology 2006年第7期48卷 857-866页

作者： Zhao-Shi Xu You-Zhi Ma Xian-Guo cheng li-Xia Cao lian-cheng li ming chen Key Laboratory of Crop Genetics and Breeding Ministry of Agriculture Institute of Crop Science the Chinese Academy of Agricultural Sciences Beijing 100081 China

Phosphorylation of protein klnases has profound effects on their activity and interaction with other proteins. Tyroslne phosphorylation was reported to be involved in various physiological processes in plants; however, no typical receptor tyrosine kinase has been isolated from plants thus far. Dual-specificity kinases are potentially responsible for the phosphorylation of both tyrosine and serine/threonine of target proteins. A cDNA clone encoding a putative dual-specificity protein kinase was isolated by screening the cDNA GAL4 activation domain （AD） fusion library of soybean （Glycine max L.）, and its entire length was obtained using 5＇-rapid ampUflcatlon of cDNA ends. The predicted polypeptide of 330 amino acid residues, designated as GmSTY1, contains all 11 conserved subdomains, which share common characteristics with both the serine/ threonine and tyroslne protein klnases reported thus far. In addition, three potential N-linked glycosylation sites （NXS/T）, as well as phosphorylation motifs （SXXXS/T）, were observed, suggesting that GmSTY1 may be post-translationally modified. Furthermore, a potential N-myristoylation motif （MGARCSK） was found, suggesting that the GmSTY1 protein could associate with membranes in vivo. Southern blotting analysis revealed a single-copy of GmSTY1 in the genome. Northern blotting analysis showed that this gene was upregulated by drought and salt treatment in a time-dependent manner; however, exogenous abscisic acid （ABA） could not significantly affect the mRNA accumulation of GmSTY1. Interestingly, the transcript of this gene was remarkably downregulated by cold treatment during the early stages of the response, but upregulated later. These results Indicate that the protein kinase was possibly regulated by abiotic stresses in an ABA-independent pathway.

关键词： abiotic stress dual-specificity Glycine max , serine/threonine/tyrosine protein kinase.

New Hydrogen Bonded Supramolecular Hydrogels Formed through Gelating Two Isomeric Building Units Simultaneously

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Chinese Chemical Letters 2006年第10期17卷 1388-1390页

作者： Ji Wei WU li ming TANG Kai chen liang YAN Yu Jiang WANG Laboratory of Advanced Materials Department of Chemical Engineering Tsinghua University Beijing 100084

New hydrogen bonded supramolecular hydrogels were formed through simultaneously gelating two isomeric building units, 4-oxo-4-（2-pyridinylamino）butanoic acid （G1） and 4-oxo-4-（3-pyridinylamino）butanoic acid （G2... 详细信息

关键词： Supramolecular hydrogel hydrogen bond gelation.

Genome Analysis of the Bombyx mori Infectious Flacherie Virus Isolated in China

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Agricultural Sciences in China 2010年第2期9卷 299-305页

作者： li ming-qian chen Xiao-xue WU Xiao-xia MAN Na-na JIN Wei LU Xing-meng Laboratory of Invertebrate Pathology College of Animal Sciences Zhejiang University Hangzhou 310029 P.R.China

We reported here the complete genome of the Bombyx mori infectious flacherie virus （BmlFV）, BmlFV-CHN01, isolated in China and compared it with the Japanese strain IFV （BmIFV-JAN） sequence. BmIFV-JAN and BmIFV-CHN01 were 99% identical in nucleotide and amino acid sequences. The amino acid sequences of the three structural proteins （VP1, VP3 and VP4） and L protein were 100% identical between the two strains. Phylogenetic analyses based on conserved domains in RNA-dependent RNA polymerases （RdRps） by the neighbor-joining method showed that these two strains were from the same virus. The gain of the whole genome of the BmIFV isolated in China and its weak mutation character established a great foundation to the study of functional genome and the molecular epidemiology of BmIFV.

关键词： Bombyx mori infectious flacherie virus complete genome phylogenetic analysis

High speed ghost imaging based on a heuristic algorithm and deep learning

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Chinese Physics B 2021年第6期30卷 287-293页

作者： Yi-Yi Huang chen Ou-Yang Ke Fang Yu-Feng Dong Jie Zhang li-ming chen ling-An Wu Institute of Physics Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China IFSA Collaborative Innovation Center and School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China College of Engineering Physics Shenzhen Technology UniversityShenzhen 518118China

We report an overlapping sampling scheme to accelerate computational ghost imaging for imaging moving targets,based on reordering a set of Hadamard modulation matrices by means of a heuristic algorithm. The new condensed overlapped matrices are then designed to shorten and optimize encoding of the overlapped patterns, which are shown to be much superior to the random matrices. In addition, we apply deep learning to image the target, and use the signal acquired by the bucket detector and corresponding real image to train the neural network. Detailed comparisons show that our new method can improve the imaging speed by as much as an order of magnitude, and improve the image quality as well.

关键词： high speed computational ghost imaging heuristic algorithm deep learning

Ultrafast structural dynamics using time-resolved x-ray diffraction driven by relativistic laser pulses

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Chinese Physics B 2021年第9期30卷 77-82页

作者： Chang-Qing Zhu Jun-Hao Tan Yu-Hang He Jin-Guang Wang Yi-Fei li Xin Lu Ying-Jun li Jie chen li-ming chen Jie Zhang Beijing National Laboratory of Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Songshan Lake Materials Laboratory Dongguan 523808China State Key Laboratory for GeoMechanics and Deep Underground Engineering China University of Mining and TechnologyBeijing 100083China Department of Physics College of ScienceChina University of Mining and TechnologyBeijing 100083China IFSA Collaborative Innovation Center and School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China

Based on a femtosecond laser plasma-induced hard x-ray source with a high laser pulse energy(>100 mJ)at 10 Hz repetition rate,we present a time-resolved x-ray diffraction system on an ultrafast time *** laser intensity is at relativistic regime(2×10^(19)W/cm^(2)),which is essential for effectively generating K_(α)source in high-Z metal *** produced copper K_(α)radiation yield reaches to 2.5×10^(8)photons/sr/*** multilayer mirrors are optimized for monochromatizating and two-dimensional beam shaping of Kα*** experiment exhibits its ability of monitoring the transient structural changes in a thin film SrCoO_(2.5)*** is demonstrated that this facility is a powerful tool to perform dynamic studies on samples and adaptable to the specific needs for different particular applications with high flexibility.

关键词： ultrafast x-ray diffraction transient structural changes multilayer mirrors