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Multifunctional Polypyrrole-silver Coated Layered Double Hydroxides Embedded into a Biodegradable Polymer Matrix for Enhanced Antibacterial and Gas Barrier Properties

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Journal of Bioresources and Bioproducts 2019年第4期4卷 231-241页

作者： Haibo HUANG Long MAO Zhihan LI Yuejun LIU Shuhong FAN Yao JIN Jianda XIE Key Laboratory of Advanced Packaging Materials and technology of Hunan Province Hunan University of TechnologyZhuzhou 412007China Fujian Provincial Key Laboratory of Functional Materials and Applications Xiamen University of TechnologyXiamen 361024China

In this study,polypyrrole-silver coated layered double hydroxides(LDHs@PPy-Ag)was prepared by chemical polymerization of pyrrole(Py)with silver *** nanoparticles(AgNPs)could be uniformly reduced onto PPy coatings in situ by redox reaction during simultaneous polymerization *** LDHs@PPy-Ag/poly(ε-caprolactone)(PCL)nanocomposites were fabricated by solution casting *** is revealed that spherical AgNPs are loaded on PPy coatings ***,compared with pure PCL,LDHs@PPy-Ag/PCL nanocomposites with incorporation of only 1 wt%LDHs@PPy-Ag show a 17%increase in tensile strength(36.5 MPa)and a 29%increase in elongation at break(822%).Upon PPy-Ag coatings onto original LDHs,oxygen relative permeability of LDHs@PPy-Ag/PCL nanocomposites decreases to 52%with the same ***,due to the double antibacterial activity of PPy and AgNPs,the antibacterial rate of LDHs@PPy-Ag reaches 100%.And the corresponding LDHs@PPy-Ag/PCL nanocomposites also show outstanding antibacterial *** the superiority of their comprehensive performance,antibacterial LDHs@PPy-Ag/PCL nanocomposites can be used further for the application as biodegradable polymeric active packaging materials.

关键词： antibacterial activity layered double hydroxides polypyrrole silver gas barrier properties

Associations between the use of red yeast rice preparations and adverse health outcomes:An umbrella review of meta-analyses of randomized controlled trials

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Journal of Integrative Medicine 2024年第2期22卷 126-136页

作者： Zhen-yu Ma Shu-ping Yang Ying Li Tian-tian Xu Ya-lin Yang Hui-yong Yang Heng-bing Li Le-jin Zhou Yong Diao Su-yun Li School of Medicine Huaqiao UniversityQuanzhou 362021Fujian ProvinceChina College of Traditional Chinese Medicine Shandong University of Traditional Chinese MedicineJinan 250355Shandong ProvinceChina Second Clinical Medical College Nanjing Medical UniversityNanjing 211166Jiangsu ProvinceChina

Background:Red yeast rice(RYR),a natural lipid-lowering agent,is widely used in clinical ***,the existing meta-analyses concerning the safety of RYR preparations have yielded inconsistent results,and the credibility of the evidence has not been ***:This study was designed to evaluate the existing evidence and offer a comprehensive understanding of the associations between the use of RYR preparations and various adverse health *** strategy:Seven literature databases were searched from inception to May 5,2023,using medical subject headings and free-text terms(e.g.,“red yeast rice,”“Xuezhikang,”and“Zhibitai”).Inclusion criteria:Meta-analyses that investigated and quantitatively estimated associations between the use of RYR preparations and adverse health outcomes were included in this *** extraction and analysis:Two researchers independently extracted data using a standardized data collection table;any disagreements were resolved by consulting a third *** on the participant,intervention,comparator and outcome(PICO)framework in each eligible meta-analysis,a series of unique associations between the use of RYR preparations and adverse health outcomes were *** associations’effect estimates were re-evaluated using random-effect ***:Fifteen meta-analyses,comprising 186(164 unique)randomized controlled trials,were *** on A Mea Surement Tool to Assess Systematic Reviews version 2,3(20%)and 12(80%)of these meta-analyses had low and critically low confidence,respectively.A total of 61 unique associations between the use of RYR preparations and adverse health outcomes were extracted from eligible *** on the random-effect models,10(16.4%)associations indicated a significant protective effect of RYR preparations against adverse health outcomes,while 5(8.2%)indicated an increased risk of adverse health outcomes related to uric acid,alanine transaminase and aspartate trans

关键词： Red yeast rice Safety Adverse health outcomes Umbrella review Meta-analysis Systematic review

Formaldehyde oxidation on Pd/USY catalysts at room temperature: The effect of acid pretreatment on supports

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Journal of Environmental sciences 2023年第3期125卷 811-822页

作者： Xiaofeng Liu Chunying Wang Yumin Chen Qi Qin Yaobin Li Hong He Center for Excellence in Regional Atmospheric Environment Key Laboratory of Urban Pollutant ConversionChinese Academy of SciencesInstitute of Urban EnvironmentXiamen 361021China University of Chinese Academy of sciences Beijing 100049China Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control Chinese Academy of SciencesNingbo Urban Environment Observation and Research Station-NUEORSNingbo 315800China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-environmental SciencesChinese Academy of SciencesBeijing 100085China xiamen Key Laboratory of Materials for Gaseous Pollutant Control Chinese Academy of SciencesInstitute of Urban EnvironmentXiamen 361021China

The complete catalytic oxidation of formaldehyde (HCHO) to CO_(2)and H_(2)O at room temperature is a green route for indoor HCHO *** is an excellent carrier material for HCHO oxidation due to its large surface area,intricate pores and high adsorption ***,the zeolite-supported noble metal catalysts have currently shown relatively low activity especially at room *** this work,we present a facile acid treatment strategy for zeolite catalysts to improve the hydroxyl concentration and further enhance their catalytic activity for HCHO *** tests illustrated that HCHO could be completely oxidized to CO_(2)and H_(2)O at a nearly 100%conversion rate with a weight hourly space velocity (WHSV) of 150,000 mL/(g·hr) at 25℃,when the support of Pd/USY catalysts was pretreated by hydrochloric acid with a concentration of 0.20 mol/*** characterization results revealed that the active hydroxyl groups originated from the dealumination in the acid treatment play a key role in the HCHO oxidation *** deduced reaction mechanism suggests that bridging hydroxyl groups may oxidize HCHO to dioxymethylene(DOM) species and terminal hydroxyl groups are responsible for the transformation of DOM groups to formate (HCOO) species.

关键词： Formaldehyde oxidation USY zeolite Acid treatment Hydroxyl groups

Deciphering the potassium storage phase conversion mechanism of phosphorus by combined solid-state NMR spectroscopy and density functional theory calculations

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Journal of Energy Chemistry 2023年第4期79卷 45-53页

作者： Huixin Chen Lingyi Meng Hongjun Yue Chengxin Peng Qiaobao Zhang Guiming Zhong Ding Chen State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College of Mechanical and Vehicle EngineeringHunan UniversityChangsha 410082HunanChina CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002FujianChina Laboratory of Advanced Spectro-electrochemistry and Li-ion Batteries Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials Xiamen Institute of Rare Earth MaterialsHaixi InstitutesChinese Academy of SciencesXiamen 361021FujianChina Department of Materials science and Engineering College of MaterialsXiamen UniversityXiamen 361005FujianChina School of Materials science and Chemistry University of Shanghai for Science and TechnologyShanghai 200093China

Phosphorus is the potential anode material for emerging potassium-ion batteries(PIBs)owing to the highest specific capacity and relatively low operation ***,the reversible delivered capacities of phosphorus-based anodes,in reality,are far from the theoretical capacity corresponding to the formation of K3P ***,their underlying potassium storage mechanisms remain poorly *** address this issue,for the first time,we perform high-resolution solid-state31P NMR combined with XRD measurements,and density functional theory calculations to yield a systemic quantitative understanding of(de)potassiation reaction mechanism of phosphorus *** explicitly reveal a previously unknown asymmetrical nanocrystalline-to-amorphous transition process via rP←→(K_(3)P_(11),K_(3)P_(7),beta-K_(4)P_(6))←→(alpha-K4P6)←→(K_(1-x)P,KP,K_(4-x)P3,K_(1+x)P)←→(amorphous K4P3,amorphous K3P)that are proceed along with the electrochemical potassiation/depotassiation ***,the corresponding KP alloys intermediates,such as the amorphous phases of K_(4)P_(3),K_(3)P,and the nonstoichiometric phases of“K_(1-x)P”,“K_(1+x)P”,“K_(4-x)P_(3)”are experimentally detected,which indicating various complicated K-P alloy species are coexisted and evolved with the sluggish electrochemical reaction kinetics,resulting in lower capacity of phosphorus-based *** findings offer some insights into the specific multi-phase evolution mechanism of alloying anodes that may be generally involved in conversion-type electrode materials for PIBs.

关键词： Red phosphorus Phase conversion Solid-state NMR Potassium ion batteries

Controlling synthesis and host sensitized Eu^(3+) emissions of K_5Gd_9F_(32) and GdF_3

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science China(Technological sciences) 2015年第5期58卷 899-906页

作者： XIE An CAO ChunYan CAO RenPing NOH HyeonMi JEONG JungHyun School of Materials science and Engineering Xiamen University of Technology College of Mathematics and Physics Jinggangshan University Department of Physics Pukyong National University

By controlling the reactant ratios, hydrothermal time, hydrothermal temperatures, p H values of the prepared solutions, and the concentrations of K3C6H5O7·2H2O, 1 mol% Eu3+ doped cubic phase of K5Gd9F32 and/or orthorhombic phase of Gd F3 micro/nanocrystals have been synthesized based on a hydrothermal method. For comparison, the sample was also synthesized by a co-precipitation method. The samples were characterized by X-ray diffraction(XRD) patterns, field emission scanning electron microscopy(FE-SEM) images, energy-dispersive spectroscopy(EDS) spectra, and photoluminescence(PL) excitation and emission spectra. By host Gd3+ sensitizing, the Eu3+ presents relatively strong emissions. The energy transfers from host Gd3+ to doping Eu3+ are observed in all the samples and the energy transfer plays an important role in the emission of Eu3+. Acting as a probe, the Eu3+ presents its distinct optical properties in the samples.

关键词： hydrothermal sensitized reactant cubic crystalline emissions dispersive doping excitation orthorhombic

Multiple trapping using a focused hybrid vector beam

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Chinese Physics B 2019年第9期28卷 186-192页

作者： Li Zhang Xiaodong Qiu Lingwei Zeng Lixiang Chen School of Physics and Optoelectronic Engineering Foshan UniversityFoshan 528000China Department of Physics Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devicesand Jiujiang Research InstituteXiamen UniversityXiamen 361005China

We propose a simple and efficient method that uses a single focused hybrid vector beam to confine metallic Rayleigh particles at multiple *** study the force mechanisms of multiple trapping by analyzing the gradient and scattering *** is observed that the wavelength and topological charges of the hybrid vector beam regulate the trapping positions and number of optical trap *** proposed method can be implemented easily in three-dimensional space, and it facilitates both trapping and organization of ***, it can provide an effective and controllable means for nanoparticle manipulation.

关键词： multiple trapping focused hybrid vector beam nanoparticle manipulation

Silkworm Extract Ameliorates Type 2 Diabetes Mellitus and Protects Pancreaticβ-cell Functions in Rats

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Digital Chinese Medicine 2020年第4期3卷 275-282页

作者： WAN Hui-Qi QI Huan-Yang XU Guang-Hui HUANG Yi-Qi College of Pharmacy Fujian University of Traditional Chinese MedicineFuzhouFujian 350122China Pharmaceutical Research Center Xiamen Medicine Research InstituteXiamenFujian 361008China

Objective The aim of the present study was to investigate the hypoglycemic effects of silkworm extract(SE)on experimental type 2 diabetes mellitus(T2DM)*** SE was prepared by dissolving freeze-dried silkworm powder in 70%(v/v)aqueous ethanol.T2DM rats were induced by feeding them a high fat diet and an intraperitoneal injection of streptozotocin(STZ).The blood glucose,free fatty acid(FFA),malondialdehyde(MDA),tumor necrosis factor alpha(TNF-α)and superoxide dismutase(SOD)levels were detected by enzyme-linked immunosorbent assay(ELISA).The quality of SE was controlled by high performance liquid chromatography(HPLC;Agilent 1260,Agilent,USA).Hematoxylin-eosin(HE)staining was performed for histological *** expression was assessed via immunohistochemistry(IHC)*** SE could improve insulin resistance and islet cell function by reducing FFA,MDA and TNF-αlevels and increasing SOD *** addition,pancreatic HE staining analysis revealed that SE has a protective effect on isletβ-*** The present study indicates that SE has hypoglycemic as well as pancreatic protective effects in T2DM model rats.

关键词： Silkworm extract Hypoglycemic activity Type 2 diabetes mellitus(T2DM) Insulin resistance Pancreatic protection

Antibiotic resistance mechanisms of Myroides sp.

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Journal of Zhejiang University-science B(Biomedicine & Biotechnology) 2016年第3期17卷 188-199页

作者： Shao-huaHU Shu-xing YUAN Hai QU Tao JIANG Ya-jun ZHOU Ming-xi WANG De.song MING Yun Leung Laboratory for Molecular Diagnostics School of Biomedical Sciences and Institute of Molecular MedicineHuaqiao University/Engineering Research Center of Molecular MedicineMinistry of EducationXiamen 361021China Department of Neurosurgery Linyi People's Hospital Linyi 276000China Linyi Health School of Shandong Province Linyi 276000China Institute of Nanomedicine Department of Medical LaboratoryWeifang Medical CollegeWeifang 261053China Department of Clinical Laboratory Quanzhou First Hospital Affiliated to Fujian Medical UniversityQuanzhou 362000China

Bacteria of the genus Myroides （Myroides spp.） are rare opportunistic pathogens. Myroides sp. infections have been reported mainly in China. Myroides sp. is highly resistant to most available antibiotics, but the resistance mechanisms are not fully elucidated. Current strain identification methods based on biochemical traits are unable to identify strains accurately at the species level. While 16S ribosomal RNA （rRNA） gene sequencing can accurately achieve this, it fails to give information on the status and mechanisms of antibiotic resistance, because the 16S rRNA sequence contains no information on resistance genes, resistance islands or enzymes. We hypothesized that ob- taining the whole genome sequence of Myroides sp., using next generation sequencing methods, would help to clarify the mechanisms of pathogenesis and antibiotic resistance, and guide antibiotic selection to treat Myroides sp. infec- tions. As Myroides sp. can survive in hospitals and the environment, there is a risk of nosocomial infections and pandemics. For better management of Myroides sp. infections, it is imperative to apply next generation sequencing technologies to clarify the antibiotic resistance mechanisms in these bacteria.

关键词： Myroides sp. Antibiotic resistance Identification methods 16S ribosomal RNA gene sequencing Nextgeneration sequencing

Fatty acid esterification of ginsenoside Rh2

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Fatty acid esterification of ginsenoside Rh2