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A Novel Regenerated Silk Fibroin-based Hydrogels with Magnetic and Catalytic Activities

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Chinese Journal of Polymer Science 2017年第4期35卷 515-523页

作者： kun-yuan luo 邵正中 State Key Laboratory of Molecular Engineering of Polymers Laboratory of Advanced Materials and Department of Macromolecular Science Fudan University Shanghai 200433 China

A simple and facile synthetic methodology for fabricating the regenerated silk fibroin （RSF）-based hydrogel which consisted of the in situ generated magnetic ferriferous oxide （Fe304） was developed. Using the co-precipitation of Fe2＋ and Fe3＋ within the RSF-based hydrogel with 90% RSF and 10% HPMC （hydroxypropyl methyl cellulose）, the as-prepared RSF/Fe304 hydrogel not only showed high strength of saturation magnetization, but also exhibited excellent catalytic activities. For example, with the assistant of 3,3＇,5,5＇-tetramethylbenzidine （TMB）, the RSF/Fe304 hydrogel could detect H202 at a concentration as low as 1 x 10-6 mol.L-1 In addition, the catalytic activities were able to be maintained for a long term under various conditions. These findings suggest that the RSF-based materials can be endowed with interesting properties, and have great potential for the applications in the fields of biotechnology and environmental chemistry.

关键词： Natural polymer Silk Hydrogel Nanoparticle Magnetic and catalytic activity

Constrain the Jerk Parameters with DESI 2024 Data

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Research in Astronomy and Astrophysics 2024年第12期24卷 177-184页

作者： Jia-Wei Wu kun-yuan Hong School of Physics and Astronomy Sun Yat-sen University Department of Physics and Astronomy University College London

The deceleration coefficient q and the jerk coefficient j obtained by the Taylor expansion of the scale factor a（t）play an important role in the study of *** current value of these coefficients for a cosmological model reflects the transition time between the phases dominated by dark energy and matter and can be used to determine if and how much the universe is ***,these coefficient values offer a way of constraining a particular cosmology *** based on this scenario was completed by Orlando Luongo and Marco ***,some approaches in this method should be tested prudently because some conditions such as ■may not be *** this study,we used the MAPAge model to reconstruct the jerk parameters （q0and j0） with DESI 2024 *** the MAPAge model ensures particular physical circumstances are satisfied in the approach of determining the jerk *** to the previous method,which used the Taylor expansion series q0,j0,and s0as model-independent parameters,we obtained more physical and slightly different results for the jerk *** results suggest that the DESI 2024 BAO data set favours different jerk parameters compared to the jerk parameters in the standardΛCDM model.

关键词： (cosmology:) cosmological parameters (cosmology:) dark energy (cosmology:) large-scale structure of universe

Theoretical study of N(C)―H…H―B multi-dihydrogen bonds

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Chinese Science Bulletin 2009年第7期54卷 1182-1189页

作者： kun yuan LIU YanZhi Lǔ LingLing College of Life Science and Chemistry Tianshui Normal University Tianshui 741001 China

The optimized geometries, frequencies and interaction energy corrected with basis set superposition error (BSSE) of the multi-dihydrogen bond complexes C4H4NH…BH4.-and CH≡CH…BH4.-have been calculated at both the B3LYP/6-311++G** and the MP2/6-311++G** levels. The calculations were per-formed to study the nature of the N―H…H3―B and C―H…H2―B red shift multi dihydrogen bond in complex C4H4NH…BH-4 and CH≡CH…BH-.4 The BSSE-corrected multi-dihydrogen bond interaction en-ergy of complex I (C4H4NH…BH4-.) and complexⅡ(CH≡CH…BH-.4) is -76.62 and -33.79 kJ/mol (MP2/6- 311++G**), respectively. From the natural bond orbital(NBO)analysis, we detailedly discussed the orbital interactions, electron density transfers, rehybridizations and the essential of the correlative bond length changes in the two complexes. In addition, solvent effect on the geometric structures, vibration frequencies and interaction energy of the monomer and complexes was studied in detail. It is relevant to the relatively dielectric constants (ε).

关键词：债券二氢相互作用能轨道相互作用相对介电常数 BSSE 振动频率 B3LYP

Theoretical study on the lithium bond interaction of furan homologues C_4H_4Y (Y=O, S) with LiCH_3 via DFT and MP2

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Chinese Science Bulletin 2008年第9期53卷 1315-1323页

作者： yuan kun LU LingLing LIU YanZhi College of Life-Science and Chemistry Tianshui Normal University Tianshui 741001 China

The optimizations geometries and interaction energy corrected by BSSE of the complexes between C4H4Y (Y=O, S) and CH3Li have been calculated at the B3LYP/6-311++G** and MP2/6-311++G** levels. Three complexes were obtained. Abnormally, the calculations showed that all the C10—Li14 bond lengths increased obviously but the blue-shift of C10—Li14 stretching frequency occurred after formed complexes. The calculated binding energy with basis set super-position error (BSSE) and zero-point vibrational energy corrections of complexes I―III is ?45.757, ?35.700 and ?39.107 kJ·mol?1, respectively. The analyses on the combining interaction with the atom-in-molecules theory (AIM) also showed that a relatively strong lithium bond interaction presented in furan homologues C4H4Y---LiCH3 systems. Natural bond orbital theory (NBO) analysis has been performed, and the results revealed that the com- plex I is formed with n-σ type lithium bond interaction between C4H4O and LiCH3, complex II is formed with π-s type lithium bond interaction between C4H4O and LiCH3, and complex III is formed with π-s and n-s type lithium bond interactions between C4H4S and LiCH3, respectively.

关键词：锂络合物理论计算 NBO AIM

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Asian gut microbiome

Science Bulletin 2017年第12期62卷 816-817页

作者： Jiro Nakayama Heping Zhang yuan-kun Lee Department of Bioscience and Biotechnology Faculty of AgricultureKyushu University Key Laboratory of Dairy Biotechnology and Engineering Education Ministry of P.R.ChinaDepartment of Food Science and EngineeringInner Mongolia Agricultural University Department of Microbiology & Immunology National University of Singapore

Several hundred microbial species inhabit the human gastrointestinal(GI)tract and constitute a complex ecological community that influences the host’s physiology and immunity through their metabolism and interactions with the host[1,2].The composition of the GI microbiota varies among *** intrinsic and extrinsic factors,including host genetics and physiology,drug and disease,and diets and some other living environments。

关键词：胃肠道微生物亚洲胃肠道菌群饮食习惯生物物种生态群落相互作用新陈代谢

What could probiotic do for us?

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Food Science and Human Wellness 2014年第2期3卷 47-50页

作者： yuan kun Lee Department of Microbiology Yong Loo Lin School of MedicineNational University of Singapore5 Science Drive 2Singapore 117597Singapore

Gastrointestinal microbes play important roles in the health and disease of the *** are many documented evidences which demonstrated that disturbance of intestinal microbiota is linked to the risk of developing infectious,inflammatory and allergic *** intestine is home for a complex consortium of 1013–1014 microbial *** between the intestinal microbes,pathogens and the host lead to exclusion of toxins(mycotoxins)and pathogens(colonization resistance),interference in disease progression as demonstrated in the prevention of oral infection,dental caries,diarrhoeas(Antibiotic Associated Diarrhoea,Travellers’Diarrhoea and Rotavirus Diarrhoea),postoperative infection,respiratory infection and certain *** group of beneficial intestinal microbes termed probiotics alter intestinal epithelial cell tight junction and immunological ***,laboratory and clinical studies demonstrated gut-brain axis communication and intestinal microbial(both pathogens and probiotics)modulation of host psycho-neuroimmunological functions,in relation to depression,anxiety and memory *** open up many possibilities of probiotics supplementation for moderating intestinal microbiota as an approach in disease prevention and treatment.

关键词： prevention intestine allergic

Value of T-tube in biliary tract reconstruction during orthotopic liver transplantation:a meta-analysis

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第5期12卷 357-364页

作者： Wei-dong HUANG Jiu-kun JIANG yuan-qiang LU Department of Emergency the First Affiliated Hospital School of Medicine Zhejiang University Hangzhou 310003 China

Objective:To compare biliary complications after biliary tract reconstruction with or without T-tube in orthotopic liver ***:Randomized control trials(RCTs) and comparative studies were identified by a computerized literature search of the Cochrane Library,MEDLINE(1966/1-2010/4),Scopus(1980/1-2010/4),***(2010/4),the Cochrane Hepato-Biliary Group Controlled Trials Register,and the Cochrane Central Register of Controlled *** and data were extracted and assessed *** outcomes were reported as odds ratios(ORs) and weighted mean difference with 95% confidence intervals(CI).Results:Five RCTs and eight comparative studies with a total of 1 608 subjects were *** data showed that the operation with T-tube had better outcomes for duct stenosis(P=0.01,OR=0.45,95% CI 0.24-0.85).The operations with or without T-tube had equivalent outcomes as follows:overall biliary complications(P=0.85,OR=1.15,95% CI 0.28-4.72),bile leaks(P=0.38,OR=0.75,95% CI 0.39-1.42),and cholangitis(P=0.24,OR=4.64,95% CI 0.36-60.62).These results were strengthened by the analysis of all thirteen non-randomized and randomized ***:Our systematic review and meta-analysis suggest that the insertion of a T-tube reduces the incidence of biliary stenosis without increasing the incidence of other biliary complications.

关键词： Liver transplantation Drainage Biliary tract Meta-analysis T-tube

Mathematical Viscosity Models for Ternary Metallic and Silicate Melts

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Journal of Iron and Steel Research International 2004年第3期11卷 1-4页

作者： FU yuan-kun MENG Xian-min GUO Han-jie Anhui University of Technology University of Science and Technology Beijing

The mathematical viscosity models for metallic melts were discussed. The experimental data of Ag-Au-Cu systems were used to verify the models based on Chou′s general geometric thermodynamic model and the calculated results are consistent with the reported experimental data. A new model predicting the viscosity of multi-component silicate melts was established. The CaO-MnO-SiO 2,CaO-FeO-SiO 2 and FeO-MnO-SiO 2 silicate slag systems were used to verify the model.

关键词： viscosity metallic melt silicate melt

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Identification of differentially expressed proteins in poplar leaves in-duced by Marssonina brunnea f. sp. Multigermtubi

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Journal of Genetics and Genomics 2008年第1期35卷 49-60页

作者： kun yuan Bo Zhang Yanmei Zhang Qiang Cheng Mingxiu Wang Minren Huang Key Laboratory of Forest Genetics and Gene Engineering Nanjing Forestry University Nanjing 210037 China Rubber Research Institute Chinese Academy of Tropical Agricultural Sciences Danzhou 571737 China South Subtropical Crops Research Institute Chinese Academy of Tropical Agricultural Sciences Zhanjiang 524091 China

Black spot disease in poplar is a disease of the leaf caused by fungus. The major pathogen is Marssonina brunnea f. sp. multigermtubi. To date, little is known about the molecular mechanism of poplar （M. brunnea） interaction. In order to identify the proteins related to disease resistance and understand its molecular basis, the clone ＂NL895＂（P. euramericana CL＂NL895＂）, which is highly resistant to M. brunnea f. sp. multigermtubi, was used in this study. We used two-dimensional gel electrophoresis （2-DE） and mass spectrometry （MS） to identify the proteins in poplar leaves that were differentially expressed in response to black spot disease pathogen, M. brunnea f. sp. multigermtubi. Proteins extracted from poplar leaves at 0, 12, 24, 48, and 72 h after pathogen-inoculation were separated by 2-DE, About 500 reproducible protein spots were detected, of which 40 protein spots displayed differential expression in levels and were subjected to Matrix assisted laser desorption/ionization time of flight mass spectrometry （MALDI-TOF MS） followed by database searching. According to the function, the identified proteins were sorted into five categories, that is, protein synthesis, metabolism, defense response and unclassified proteins.

关键词： black spot disease defense response two-dimensional gel electrophoresis (2-DE) matrix assisted laser desorption/ionization time of flightmass spectrometry (MALDI-TOF MS) poplar