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Creating burdock polysaccharide-oleanolic acid-ursolic acid nanoparticles to deliver enhanced anti-inflammatory effects:fabrication,structural characterization and property evaluation

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Food Science and Human Wellness 2023年第2期12卷 454-466页

作者： Shanshan Zhu Zhichang Qiu Xuguang Qiao geoffrey i.n.waterhouse Wenqing Zhu Wenting Zhao Qiuxia He Zhenjia Zheng Key Laboratory of Food Processing Technology and Quality Control of Shandong Higher Education institutes College of Food Science and EngineeringShandong Agricultural UniversityTai’an 271018China The School of Chemical Sciences The University of AucklandAuckland 1025New Zealand institute of Agri-food Processing and nutrition Vegetable Research CenterBeijing Academy of Agriculture and Forestry SciencesBeijing 100097China Biology institute Qilu University of Technology(Shandong Academy of Sciences)Jinan 250103China

This study explored the potential of polysaccharides from Actium lappa(ALPs)as natural wall materials for producing ALP-based nanoparticles to deliver poorly water-soluble oleanolic acid(OA)and ursolic acid(UA).Encapsulating OA+UA with ALPs(ALP:OA+UA,50:1;OA:UA,1:1)changed the crystalline nature to a more amorphous state through hydrogen bonding and involving O-H/C-O/O-C-O ***-OA/UA nanoparticles had a particle size and zeta potential(in water)of 199.1 nm/-7.15 mV,with a narrow unimodal size distribution,and excellent pH,salt solution,temperature and storage *** with ALPs,ALPOA/UA nanoparticles showed enhanced anti-inflammatory activity(especially at a dose of 100μg/mL)in a CuSO-induced zebrafish inflammation model via down-regulating the nF-κB signalling pathway and gene expression of associated transcription factors and cytokines(TnF-α,iL-1βand iL-8).Therefore,ALP-based nanoparticles are natural and anti-inflammatory carriers for hydrophobic bioactive molecules.

关键词： Encapsulation Structural features Particle size Zeta potential Thermodynamic properties in vivo verification

Disulfide Crosslinking-induced Aggregation:Towards Solid-State Fluorescent Carbon Dots with Vastly Different Emission Colors

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Chinese Journal of Chemistry 2023年第9期41卷 1007-1014页

作者： Rui Fu Haoqiang Song Xingjiang Liu Yongqiang Zhang Guanjun Xiao Bo Zou geoffrey i.n.waterhouse Siyu Lu Green Catalysis Center and College of ChemistryZhengzhou UniversityZhengzhouHenan 450000China State Key Laboratory of Superhard Materials College of PhysicsJilin UniversityChangchunJilin 130012China School of Chemical Sciences The University of AucklandAuckland 1142New Zealand

Solid-state fluorescent multi-color carbon dots(SFM-CDs),prepared using the same precursor(s)without the need for dispersion in a solid matrix,are highly demanded for a wide range of ***,we report a microwave-assisted strategy for the prepara-tion of SFM-CDs with blue,yellow and red emissions within 5 min from the same *** as-prepared B-CDs,Y-CDs,and R-CDs possessed bright fluorescence at 425 nm,550 nm,and 640 nm,and photoluminescence quantum yields(PLQYs)of 54.68%,17.93%,and 2.88%,*** structure of SFM-CDs consisted of 5-oxo-3,5-dihydro-2H-thiazolo[3,2-a]pyridine-7-carboxylic acid(TPCA)immobilized on the surface of a carbon core,with the size of the carbon core and degree of disulfide crosslinking between CDs both increasing on going from the B-CDs to the R-CDs,as verified by mechanochromic *** excellent solid-state fluorescence performance of the SFM-CDs allowed their utilization as the fluorescent converter layer in multi-color LEDs and white LEDs with a high color rendering index.

关键词： Solid-state fluorescence Multicolor Cross-linked aggregation Disulfide bond Carbon dots

Pectin fractions extracted sequentially from Cerasus humilis:Their compositions,structures,functional properties and antioxidant activities

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Food Science and Human Wellness 2023年第2期12卷 564-574页

作者： Shikai Zhang geoffrey inwaterhouse Tingting Cui Dongxiao Sun-waterhouse Peng Wu College of Food Science and Engineering Shandong Agricultural UniversityTaian 271018China School of Chemical Sciences The University of AucklandPrivate Bag 92019New Zealand Biology institute Qilu University of Technology(Shandong Academy of Sciences)Jinan 250103China

Three pectin fractions(water-soluble fraction(WSF),chelator-soluble fraction(CSF),and sodium carbonatesoluble fraction(nSF))were obtained from Chinese dwarf cherry(Cerasus humilis)*** of them were branched low methoxylated pectins with an amorphous or partially nanocrystalline nature and eight neutral monosaccharides(arabinose and galactose were most abundant).WSF,CSF and nSF had a degree of methylation(DM)of 35.82%,14.85%and 7.13%,uronic acid(UA)content of 76.02%,83.71%and 69.01%,and total protein content of 2.4%,2.1%and 8.8%,*** molecular weights were 340.31,330.16 and 141.31 kg/mol,respectively(analyzed by gel permeation chromatography(GPC)).WSF,CSF and nSF exhibited good rheological,thermal,emulsifying,emulsion-stabilizing,water-adsorbing,oil-binding,cholesterol-binding and antioxidant *** had the highest emulsifying,emulsion stabilizing,water-/oil-/cholesterol-binding and antioxidant capacities,followed by *** had the highest viscosity(406.77 m Pa·s),flowability,and resistance to heat-induced changes/damage,which may be related to its lowest polydispersity index,DM and UA content and highest protein *** three pectin fractions with desirable characteristics can be used as food additives/ingredients and dietary supplements.

关键词： Cerasus humilis fruits Pectin fractions Structural characteristics Processing-related functional properties

Ultrafine monolayer Co-containing layered double hydroxide nanosheets for water oxidation

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Journal of Energy Chemistry 2019年第7期28卷 57-63页

作者： Xiaodan Jia Xin Zhang Jiaqing Zhao Yufei Zhao Yunxuan Zhao geoffrey i.n.waterhouse Run Shi Li-Zhu Wu Chen-Ho Tung Tierui Zhang Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences.Beijing 100049 China School of Chemistry and Chemical Engineering Xi'an University of Science and TechnologyXi'an 710054ShaanxiChina School of Chemical Sciences The University of AucklandAuckland 1142New Zealand

For many two-dimensional(2D)materials,low coordination edges and corner sites offer greatly enhanced catalytic performance compared to basal sites,motivating the search for new synthetic approaches towards ultrathin and ultrafine 2D nanomaterials with high specific surface *** date,the synthesis of catalysts that are both ultrathin(monolayer)and ultrafine(lateral sizenm)has proven extremely ***,using a facile ultrasonic exfoliation procedure,we describe the successful synthesis of ultrafine ZnCo-LDH nanosheets(denoted as ZnCo-UF)with a size^3.5 nm and thickness^0.5 *** single layer ZnCo-UF nanosheets possess an abundance of oxygen vacancies(Vo)and unsaturated coordination s让es,thereby affording outstanding electrocatalytic water oxidation *** calculations confirmed that Vo on the surface of ZnCo-UF enhanced H20 adsorption via increasing the electropositivity of the nanosheets.

关键词： Layered double hydroxides Ultrafine nanosheets Oxidation evolution reaction

Polysaccharides from edible fungi Pleurotus spp.:advances and perspectives

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Journal of Future Foods 2021年第2期1卷 128-140页

作者： Zhenhua Yin Dongxiao Sun-waterhouse Jinmei Wang Changyang Ma geoffrey i.n.waterhouse Wenyi Kang national R&D Center for Edible Fungus Processing Technology Henan UniversityKaifeng 475004China Functional Food Engineering Technology Research Center Kaifeng 475004China Comprehensive Utilization of Edible and Medicinal Plant Resources Engineering Technology Research Center Huanghe Science and Technology CollegeZhengzhou 450063China School of Chemical Sciences The University of AucklandPrivate Bag 92019AucklandNew Zealand

Pleurotus *** one of the most precious and common edible fungi,polysaccharides were the main active *** structural,biological activities and structure-activity relationship(SAR)of polysaccharides from Pleurotus *** systematically *** the basis of structure and biological activity,structure-activity relationships were also analyzed and discussed to look forward to its future research direction and application *** the past 5 years,about 30 kinds of polysaccharides were isolated from Pleurotus spp.,and their preliminary structures were studied,but the fine structures seldomly *** polysaccharides showed the activities of immunomodulatory,hypoglycemic,anti-inflammatory,antioxidant,anti-ageing,hepatoprotective,anti-tumor,hypolipidemic and regulating intestinal flora,but the mechanism was needed further *** were few studies on the SAR of polysaccharides from Pleurotus,and the polysaccharides of *** were *** was found that the biological activities of polysaccharides were affected by molecular weight,monosaccharide composition,sugar chain structure and *** addition,sulfonation and selenization could significantly increase the bioactivities of *** findings might help to better understand the research status of polysaccharides from Pleurotus *** provided a scientific basis for their application as functional foods.

关键词： Pleurotus spp Polysaccharides Structural characteristics Biological activities Structure-activity relationship

Targeted alleviation of ischemic stroke reperfusion via atorvastatin-ferritin Gd-layered double hydroxide

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Bioactive Materials 2023年第2期20卷 126-136页

作者： Li Wang Baorui Zhang Xueting Yang Shuaitian Guo geoffrey i.n.waterhouse Guangrong Song Shanyue Guan Aihua Liu Liang Cheng Shuyun Zhou Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing100190China Beijing neurosurgical institute and Beijing Tiantan Hospital Capital Medical UniversityChina National Clinical Research Center for Neurological DiseasesBeijing100070China institute of Functional nano&Soft Materials(FUnSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou215123China School of Chemical Sciences The University of AucklandAuckland1142New Zealand

in acute ischemic stroke therapy,potent neuroprotective agents are needed that prevent neural injuries caused by reactive oxygen species(ROS)during ischemic ***,a novel 2D neuroprotective agent(AFGd-LDH)is reported,comprising Gd-containing layered double hydroxide nanosheets(Gd-LDH,as a drug nanocarrier/MRi contrast agent),atorvastatin(ATO,as a neuroprotective drug)and the ferritin heavy subunit(FTH,as a blood brain barrier transport agent).Experiments revealed AFGd-LDH to possess outstanding antioxidant activity,neuroprotective properties,blood‒brain barrier transit properties,and *** vitro studies demonstrated the ROS scavenging efficiency of AFGd‒LDH to be~90%,surpassing CeO_(2)(50%,a ROS scavenger)and edaravone(52%,a clinical neuroprotective drug).ischemia‒reperfusion model studies in mice showed AFGd‒LDH could dramatically decrease apoptosis induced by reperfusion,reducing the infarct area by 67%and lowering the neurological deficit score from 3.2 to ***-LDH also offered outstanding MRi performance,thus enabling simultaneous imaging and ischemia reperfusion therapy.

关键词： Layered double hydroxide ROS scavenger Atorvastatin ischemic stroke Multimodal imaging

Pyridinium salt-based covalent organic framework with well-defined nanochannels for efficient and selective capture of aqueous^(99)TcO_(4)^(-)

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Science Bulletin 2022年第9期67卷 924-932,M0004页

作者： Mengjie Hao Zhongshan Chen Hui Yang geoffrey i.n.waterhouse Shengqian Ma Xiangke Wang College of Environmental Science and Engineering North China Electric Power UniversityBeijing 102206China MacDiarmid institute for Advanced Materials and nanotechnology School of Chemical SciencesThe University of AucklandAuckland 1142New Zealand Department of Chemistry University of North TexasDentonTX 76201USA

ionic covalent organic framework(COF)materials with high specific surface areas and well-defined pore structures are desired for many applications yet seldom ***,we report a cationic pyridinium salt-based COF(PS-COF-1)with a Brunauer-Emmett-Teller(BET)surface area of 2703 m^(2) g^(-1),state-ofthe-art for an ionic *** by its ordered pore structure,chemical stability,and radiation resistance,PS-COF-1 showed exceptional adsorption properties toward aqueous ReO_(4)^(-)(1262 mg g^(-1))and ^(99)TcO_(4)^(-).its adsorption performance surpassed its corresponding amorphous ***,PS-COF-1 exhibited fast adsorption kinetics,high adsorption capacities,and selectivity for ^(99)TcO_(4)^(-)and ReO_(4)^(-)at high ionic strengths,leading to the successful removal of ^(99)TcO_(4)^(-)under conditions relevant to low-activity waste streams at US legacy Hanford nuclear *** addition,PS-COF-1 can rapidly decontaminate ReO_(4)^(-)/^(99)TcO_(4)^(-)polluted potable water(~10 ppb)to drinking water level(0 ppb,part per billion)within 10 *** functional theory(DFT)calculations revealed PS-COF-1 has a strong affinity for ReO_(4)^(-)and ^(99)TcO_(4)^(-),thereby favoring adsorption of these low charge density anions over other common anions(e.g.,Cl^(-),nO_(3)^(-),SO_(4)^(2-),CO_(3)^(2-)).Our work demonstrates a novel cationic COF sorbent for selective radionuclide capture and legacy nuclear waste management.

关键词： Perrhenate Pertechnetate Covalent organic frameworks Environmental remediation Anion exchange

Aggregation in carbon dots

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Aggregate

Aggregate 2022年第6期3卷 99-112页

作者： Yi Ru geoffrey i.n.waterhouse Siyu Lu Green Catalysis Center College of ChemistryZhengzhou UniversityZhengzhouChina School of Chemical Sciences The University of AucklandAucklandNew Zealand

Carbon dots(CDs)possess outstanding luminescence properties,making them widely used in optical displays,anti-counterfeiting systems,bioimaging,and ***,there is much debate about the classification of CDs,as well as their formation process,structure,and fluorescence *** plays an important role in the formation and fluorescence(e.g.,aggregationinduced emission)of CDs,yet is seldom studied in *** review aims fill this knowledge gap,by first exploring how aggregation leads to the formation of different types of CDs(e.g.,graphene quantum dots,carbon quantum dots,and carbonized polymer dots),followed by a detailed examination of the effect of aggregation-induced morphology on the luminescence properties and application of ***,opportunities and challenges for the application of CDs in various applications are discussed,with the need for better mechanistic understanding of aggregation-induced luminescence being an imperative.

关键词： aggregation carbon dots special application special luminescence special morphology

Converging Cooperative Functions into the nanospace of Covalent Organic Frameworks for Efficient Uranium Extraction from Seawater

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CCS Chemistry 2022年第7期4卷 2294-2307页

作者： Mengjie Hao Zhongshan Chen Xiaolu Liu Xianhai Liu Juyao Zhang Hui Yang geoffrey i.n.waterhouse Xiangke Wang Shengqian Ma College of Environmental Science and Engineering North China Electric Power UniversityBeijing 102206 MacDiarmid institute for Advanced Materials and nanotechnology School of Chemical SciencesThe University of AucklandAuckland 1142 Department of Chemistry University of North TexasDentonTX 76201

The extraction of uranium from seawater is challenging though it offers tremendous potential for the sustainable production of nuclear fuel for the energy ***,we report a new strategy for efficient extraction of uranium from seawater via converging the cooperative functions of adsorption-photocatalysis into the nanospace of covalent organic frameworks(COFs).Functionalization of the organic linkers in the multicomponent COFs allowed exploration of the relationship between material composition and adsorption-photocatalytic activity for uranium *** presence of amidoxime groups in the COFs offered selective binding sites for uranyl,whilst triazine units and bipyridine-Pd groups acted cooperatively to photocatalytically reduce adsorbed U(Ⅵ)to a U(Ⅳ)solid product(UO2)for facile *** of our developed COFs,4-Pd-AO,displayed exceptional performance in sequestering and reducing uranyl from natural seawater,with a high extraction capacity of 4.62 mg U/g per day(average data)under visible light *** studies revealed that 4-Pd-AO not only reduced adsorbed uranyl(Ⅵ)to U(Ⅳ)O_(2),but also generated ^(1)O_(2) and superoxide radicals under visible light excitation,thus affording excellent antibacterial and antialgal activities(i.e.,antibiofouling properties)for sustained efficient uranium extraction *** proof-ofconcept study establishes multicomponent COFs as promising candidates for efficient uranium extraction from seawater.

关键词： covalentor ganic frameworks seawater uraniumextraction adsorption-photocatalysis cooperativity