检索结果-南通市图书馆

Chinese Journal of Chemical Engineering 2023年第10期62卷 202-216页

作者： Aaron Albert Aryee Chenping Gao Runping Han lingbo qu College of Chemistry Green Catalysis CenterZhengzhou UniversityZhengzhou 450001China

The adverse effects of eutrophication have prompted the use of various remediation techniques for phosphate(PO_(4)^(3-))removal owing to it being the major causative ***,the influence of different solvents and ratios of 2-aminoterepthalicacid on the efficiency of magnetic biomass metal-organic framework composites based on the in situ growth of NH_(2)-MIL-101(Fe)onto magnetized peanut husks towards PO_(4)^(3-)removal was assessed via the adsorption *** magnetic biocomposite labelled as MPN@NH2-MIL-101(Fe)exhibited the best efficiency owing to its mesoporous structures and presence of abundant oxygen and nitrogen possessing functional *** results confirmed MPN@NH2-MIL-101(Fe)to have a high adsorption capacity of(14.0±0.3)mg·L^(-1)at a PO43-concentration of 20 mg·L^(-1)with an associated high stability within pH *** adsorption kinetics for the process was well described by both Elovich and pseudo-second-order kinetic models and was mediated by both internal diffusion and liquid film *** Temkin and Freundlich models fitted the equilibrium data well signifying occurrence of both physical and chemical adsorption on a heterogeneous *** is concluded that MPN@NH2-MIL-101(Fe)is a promising adsorbent for the effective removal of phosphate from a water body.

关键词： Magnetic biomass-MOF composite Adsorption Phosphate Mechanism

Generalized two-dimensional correlation near-infrared spectroscopy and principal component analysis of the structures of methanol and ethanol

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2010年第5期53卷 1154-1159页

作者： Liu Hao Xu JianPing qu lingbo Xiang BingRen China Pharmaceut Univ Ctr Anal & Measurement Nanjing 210009 Peoples R China Guangdong Food & Drug Vocat Coll Dept Pharm Guangzhou 510520 Guangdong Peoples R China Zhengzhou Univ Dept Chem Zhengzhou 450052 Peoples R China

Liquid state methanol and ethanol under different temperatures have been investigated by FT-NIR(Fourier transform nearinfrared) spectroscopy,generalized two-dimensional(2D) correlation spectroscopy,and PCA(principal component analysis) . First,the FT-NIR spectra were measured over a temperature range of 30-64(or 30-71) °C,and then the 2D correlation spectra were *** near-infrared spectroscopy,generalized 2D correlation spectroscopy,and references,we analyzed the molecular structures(especially the hydrogen bond) of methanol and ethanol,and performed the NIR band assignments. The PCA method was employed to verify the results of the 2D *** study will be helpful to the understanding of these reagents.

关键词： NIR(near-infrared) two-dimensional (2D) correlation spectroscopy principal component analysis (PCA) methanol ethanol

Mechanisms and reusability potentials of zirconium-polyaziridine-engineered tiger nut residue towards anionic pollutants

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2023年第8期60卷 275-292页

作者： Alexander Nti Kani Evans Dovi Aaron Albert Aryee Runping Han Zhaohui Li lingbo qu College of Chemistry Green Catalysis CenterZhengzhou UniversityZhengzhou 450001China

Access to fresh water,its availability,and its quality are a global challenge to humanity,largely due to human activities in the ***,global water security has been jeopardized,requiring urgent remediation to safeguard our very ***,a novel and facilely engineered zirconium and polyethylenimine adsorbent based on tiger nut residue (TNR) was prepared,and its adsorptive capabilities towards a model dyestuff and nutrient were invested through a batch adsorption *** developed adsorbent,zirconium-polyethylenimine-engineered tiger nut residue (TNR@PEI–Zr) was characterised by scanning electron microscopy,Fourier-transform infrared spectroscopy,X-ray diffraction analysis,and X-ray photoelectron spectroscopy to understand its morphology and surface chemistry and predict its adsorption ***@PEI–Zr had a p H point of zero charge (pH_(zpc)) of *** introduction of salts inhibited the removal efficiency of Alizarin red (AR) and phosphate (PO_(4)^(3–)) in the order of HCO_(3)^(-)>SO_(4)^(2–)>Cl^(-).Increasing temperatures (293–313 K) favoured the adsorption process at pH *** Langmuir model suited the adsorption processes of both AR and PO_(4)^(3–),implying homogenous and monolayer removal of pollutants with a maximal capacity of 537.8 mg·g^(-1)and 100.5 mg·g^(-1)at a dose of 0.01 g,*** rate-determining steps of AR and PO_(4)^(3–)followed a pseudo-secondorder kinetic model and were thermodynamically spontaneous with an increase in randomness at the solid-solution *** adsorbent’s recyclability was notable and outperformed most adsorbents in terms of removal ***@PEI–Zr was found to be stable,and its use in practical wastewater decontamination was effective,ecologically acceptable and free of secondary pollution problems.

关键词： Adsorption Modified tiger nut residue Alizarin red Phosphate Leaching Regeneration

Geometry, stability and aromaticity of β-diketiminate-coordinated alkaline-earth compounds

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2019年第12期30卷 2249-2253页

作者： Yuanyuan Li Haohua Chen lingbo qu Ruopeng Bai Yu Lan Department of Biological and Chemical Engineering Chongqing University of EducationChongqing 400067China Cooperative Innovation Center of Lipid Resources and Children’s Daily Chemicals Chongqing University of EducationChongqing 400067China School of Chemistry and Chemical Engineering Chongqing UniversityChongqing 401331China College of Chemistry and Molecular Engineering Zhengzhou UniversityZhengzhou 450006China

Alkaline-earth(Ae) metals have attracted a wealth of interdependent research from synthetic *** Ae-catalyzed organometallic reactions,β-diketiminate is a typical ligand used to stabilize Ae catalysts by forming six-membered rings comprising Ae ***,studies focusing on the configuration of β-diketiminate-coordinated Ae compounds observed that the C-C and C-N bonds are homogeneous and ***,energetic studies observed that the formation of the Ae-incorporated sixmembered rings results in enhanced stability of>20 kcal/*** nucleus-independent chemical shifts,anisotropy of the induced current density,and molecular orbital analyses demonstrated the nonaromaticity of the β-diketiminate-coordinated Ae *** improved stability of these compounds can be explained by the delocalization of the π electrons derived from the β-diketiminate moiety.

关键词： β-Diketiminate-coordinated Alkaline-earth compounds Theoretical study Aromaticity Stability

Recent progress in carbon-dots-based nanozymes for chemosensing and biomedical applications

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2021年第10期32卷 2994-3006页

作者： Deming He Minmin Yan Pengjuan Sun Yuanqiang Sun lingbo qu Zhaohui Li College of Chemistry Green Catalysis CenterHenan Joint International Research Laboratory of Green Construction of Functional Molecules and Their Bioanalytical ApplicationsZhengzhou Key Laboratory of Functional Nanomaterial and Medical TheranosticZhengzhou UniversityZhengzhou 450001China

Nanozymes are nanomaterials with enzyme-like activities that efficiently overcome the drawbacks of natural enzymes in biosensing,detection,and biomedical fields,and they are the most widely used artificial *** to their excellent catalytic characteristics,biocompatibility,and environmental favorability,carbondots-based(CDs) nanozymes have inspired a research ***,no review focusing on CDs nanozymes has been published,even though substantial advances have been ***,the advances,catalytic activities,and applications of CDs nanozymes are highlighted and *** addition,the critical issues and challenges of researching nanozymes are *** hope that this review will broaden the horizons of nanozymes and CDs nanozymes,as well as promote their development.

关键词： Carbon dots Nanozyme Chemosensing Catalytic activity Bioimaging

Recent advance of fluorescent probes for detection of drug-induced liver injury markers

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2022年第10期33卷 4478-4494页

作者： Dongqin Sun Zhenzhen Chen Jiali Hu Huajin Zeng lingbo qu Ran Yang School of Pharmaceutical Sciences Zhengzhou UniversityZhengzhou 450001China The College of Chemistry Zhengzhou UniversityZhengzhou 450001China

Drug-induced liver injury(DILI)is a common and serious adverse drug *** present,DILI is perfectly diagnozed in clinical settings using Roussel Uclaf causality assessment method(RUCAM)in its original version published 1993 and its updated version published 2016,well established worldwide as a diagnostic algorithm with a high sensitivity and ***,the search for additional detection methods supporting RUCAM *** recent years,with the development of optical imaging technology,fluorescent probes have gradually shown great advantages in the detection and diagnosis of DILI markers such as high sensitivity,anti-interference,real-time monitoring and non-invasive *** this review,the recent advances of fluorescent probes for evaluation of DILI in experimental studies were summarized according to various markers of *** believe that learning about the design and practical application of these probes will contribute to the further development of detection sensors for DILI markers.

关键词： Fluorescent probe Drug-induced liver injury(DILI) Roussel uclaf causality assessment method(RUCAM) Clinical markers Imaging

Study on the quantitative structureactivity relation-ship of C-10 substituted artemisinin(QHS)’s derivatives using rough set theory

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2008年第10期51卷 937-945页

作者： LIU Hao qu lingbo GAO HongBin WANG JinXiang HAN LiPing XIANG BingRen Department of Pharmacy Guangdong Food and Drug Vocational CollegeGuangzhou 510520China Department of Chemistry Zhengzhou UniversityZhengzhou 450052China Department of Pharmacy Changhai HospitalSecond Military Medical UniversityShanghai 200433China Center for Analysis and Measurement China Pharmaceutical UniversityNanjing 210009China

The structure-activity relationship study of C-10 substituted artemisinin (QHS) derivatives that are used as antimalarial was performed with the RS (rough sets) method. An RS process is a concise nonlinear process, and it has broad application foreground in the data mining of nonlinear life courses. In this work, initially the parameters of C-10 substituted QHS’s derivatives were computed with the quantum chemistry method, and the information table was constructed from the parameters (condition attributes) and biological activity (decision attributes). Based on the analysis of rough set theory, the core and reduction of attributes sets were obtained. Then the decision rules were extracted and the struc-ture-activity relationship was analyzed. As a nonlinear system, RS theory can extract the special rela-tion in the database. It has the advantage of being nonlinear over multiple linear regression (MLR), principal component analysis (PCA), partial least square (PLS), etc., and the advantage of obtaining results with unambiguous physical meanings over artificial neuron networks (ANNs), etc. The result obtained in this study is instructive to the study of pharmacodynamics, resistance mechanism of QHS and development of QHS’s derivatives.

关键词： rough set(RS) structure-activity relationship(SAR) artemisinin(QHS)

Direct benzylation reactions from benzyl halides enabled by transition-metal-free photocatalysis

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2022年第12期33卷 5074-5079页

作者： Panjie Xiang Kai Sun Shuang Wang Xiaolan Chen lingbo qu Bing Yu Green Catalysis Center College of ChemistryZhengzhou UniversityZhengzhou 450001China Zhengzhou Tobacco Research Institute of CNTC Zhengzhou 450001China

An SN2-based photochemical strategy using dithiocarbamate anion as catalyst was developed for the activation of benzyl halides,which are extremely challenging to be applied as radical precursors in visible light *** this transition-metal-free and oxidant-free protocol,the benzylation(or cyanomethylation)of various heterocycles including quinoxalin-2(1H)-ones,coumarin,2-phenyl-2H-indazole,1-methyl-5-phenylpyrazin-2(1H)-one,1-(fluoromethyl)cinnolin-4(1H)-one,and 2,4-dibenzyl-1,2,4-triazine-3,5(2H,4H)-dione could be realized(46 examples,up to 98%yield).Importantly,some biologically relevant 3-benzylquinoxalin-2(1H)-ones were also be synthesized under mild conditions.

关键词： Benzylation Photocatalysis Transition-metal-free Radical reaction N-Heterocyclics

Dual microenvironmental parameter-responsive lysosome-targeting carbon dots for the high contrast discrimination of a broad spectrum of cancer cells

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2022年第12期33卷 5051-5055页

作者： Yue Xiao Xiaohui Yin Pengjuan Sun Yuanqiang Sun lingbo qu Zhaohui Li College of Chemistry Institute of Analytical Chemistry for Life ScienceHenan Joint International Research Laboratory of Green Construction of Functional Molecules and Their Bioanalytical ApplicationsZhengzhou UniversityZhengzhou 450001China

The development of new carbon dots(CDs)for fluorescence-based cancer diagnosis has recently attracted extensive *** methods based on ligand-receptor fluorescence suffer from the heterogeneity of receptor *** in the microenvironments of cancer cells provide opportunities for accurate and broad-spectrum cancer *** lysosomes in cancer cells have lower polarity and higher viscosity than normal *** on these two key microenvironmental parameters,dual-responsive CDs with inherent lysosome-targeting ability were synthesized via one-step hydrothermal *** CDs exhibit many advantageous properties including facile synthesis,good water solubility,pH-independent emission,excellent photostability,good biocompatibility,and wash-free imaging *** CDs were successfully employed in the fluorescence-based discrimination of a broad spectrum of cancer cells from normal cells with high *** CDs are promising candidates for use in the field of cancer diagnosis.

关键词： Carbon dots Multiple microenvironmental parameters Lysosome-targeting High contrast imaging Cancer diagnosis

High-fidelity carbon dots polarity probes:revealing the heterogeneity of lipids in oncology

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2022年第7期11卷 1555-1564页

作者： Jingyu Hu Yuanqiang Sun Xin Geng Junli Wang Yifei Guo lingbo qu Ke Zhang Zhaohui Li Colllege of Chemistry Institute of Analytical Chemistry for Life ScienceZhengzhou Key Laboratory of Functional Nanomaterial and Medical TheranosticZhengzhou University450001 ZhengzhouChina Institute of Chemical Biology and Clinical Application at the First Affiliate Hospital Zhengzhou University450001 ZhengzhouChina Department of Chemistry and Chemical Biology Northeastern UniversityBostonMA 02115USA

Polarity is an integral microenvironment parameter in biological systems closely associated with a multitude of cellular *** polarity variations accompany the initiation and development of pathophysiological ***,monitoring the abnormal polarity is of scientific and practical *** state-of-the-art monitoring techniques are primarily based on fluorescence imaging which relies on a single emission intensity and may cause inaccurate detection due to heterogeneous accumulation of the ***,we report carbon dots(CDs)with ultra-sensitive responses to *** CDs exhibit two linear relationships:one between fluorescence intensity and polarity and the other between polarity and the maximum emission *** emission spectrum is an intrinsic property of the probes,independent of the excitation intensity or probe *** features enable two-color imaging/quantitation of polarity changes in lipid droplets(LDs)and in the cytoplasm via in situ emission *** probes reveal the polarity heterogeneity in LDs which can be applied to make a distinction between cancer and normal cells,and reveal the polarity homogeneity in cytoplasm.

关键词： polarity probes revealing