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Food Science and Human Wellness 2024年第4期13卷 1929-1942页

作者： Rui Liu Fangxin Chu Zheng Yan Hanqing Chen School of Food and Biological Engineering Hefei University of TechnologyHefei 230601China Engineering Research Center of Bio-Process Ministry of EducationHefei University of TechnologyHefei 230601China

Three novel acidic polysaccharide fractions(OFPP-1,OFPP-2,OFPP-3)with different m olecular weights(803.7,555.1 and 414.5 k Da)were isolated from the peeled Opuntia dillenii *** by alkali-extraction,graded alcohol precipitation and column *** analysis indicated that OFPPs were pectic polysaccharides consisting of rhamnose,arabinose and galactose *** backbone of OFPP-1 consisted of a repeating unit→6-α-D-Galp A-(1→2)-α-L-Rhap-(1→with T-α-D-Galp A-(1→6)-α-D-Galp A-(1→4)-α-D-Glcp-(1→,T-β-D-Xylp-(1→6)-α-D-Galp A-(1→4)-α-D-Glcp-(1→or T-α-D-Galp A-(1→3)-α-L-Araf-(1→as the side *** backbone of OFPP-2 consisted of a disaccharide repeating unit→2)-α-L-Rhap-(1→4)-β-D-Galp A-(1→with T-β-L-Araf-(1→as the branches substituted at the O-4 position of→2,4)-α-LRhap-(1→.Whereas the backbone of OFPP-3 was→2,4)-α-L-Rhap-(1→2)-α-L-Rhap-(1→3)-β-L-Araf-(1→or→2,4)-α-L-Rhap-(1→2)-α-L-Rhap-(1→4)-β-D-Galp A-(1→,which was branched at the O-4 position of→2,4)-α-L-Rhap-(1→.Moreover,these three polysaccharide fractions could protect Huh-7 cells against H2O2-induced oxidative stress to different extents by decreasing the MDA content and increasing the SOD,CAT,GSH-Px activities and the GSH level in the Huh-7 *** results suggest that OFPPs have the potential to be used as natural antioxidants.

关键词： Opuntia dillenii Haw.fruits Polysaccharide Alkali extraction structural characterization Oxidative stress

structural characterization and anti-inflammatory activities of novel polysaccharides obtained from Pleurotus eryngii

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Food Science and Human Wellness 2024年第5期13卷 3031-3042页

作者： Han Wang Sai Ma Alfred Mugambi Mariga Qiuhui Hu Qian Xu Anxiang Su Ning Ma Gaoxing Ma College of Food Science and Engineering Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and SafetyNanjing 210023China School of Agriculture and Food Science Meru University of Science and TechnologyMeru 972-60200Kenya

Natural polysaccharides named PEP-0.1-1,PEP-0-1 and PEP-0-2 from edible mushroom species Pleurotus eryngii were obtained in the present *** showed that molecular weights of these polysaccharides were 3235,2041 and 23933 Da,***,structural characterization revealed that PEP-0.1-1 had a→4-α-D-Glcp-1→backbone and contained→4)-α-D-Glcp and→4)-β-D-Glcp reducing end ***-0-1 backbone contained→4-α-D-Glcp-1→and→6-α-3-O-Me-D-Galp-1→,and the side chains containedα-D-Glcp,β-D-Manp-1→andα-D-Glcp-3→.However,PEP-0-2 backbone consisted of→4-α-DGlcp-1→and→6-α-3-O-Me-D-Galp-(1→6)-α-D-Galp-1→while the side chains containedα-D-Glcp andβ-D-Manp-1→.Biological activity analysis was then carried out and found that all these polysaccharides could significantly suppress the relative mRNA expression of toll-like receptor 4,nitric oxide(NO),tumor necrosis factor-α,interleukin(IL)-1βand IL-6 in lipopolysaccharide(LPS)-induced inflammation of RAW264.7 cells,as well as the over secretion of the above cell ***,Western blotting analysis revealed that all these purified fractions displayed significant inhibition effects on the expression of c-Jun N-terminal kinases protein induced by LPS in mitogen activated protein kinase pathway,along with the relieving on the inhibition effect of LPS on IκB-αprotein *** summary,the information generated by the present study could provide a theoretical basis for the exploration of novel healthy food materials from edible mushroom with antiinflammation activities.

关键词： Pleurotus eryngii Polysaccharides structural characterization Anti-inflammatory activity

structural characterization and immunostimulatory activity of a water-soluble polysaccharide from abalone(Haliotis discus hannai Ino)muscle

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Food Science and Human Wellness 2023年第2期12卷 495-502页

作者： Linfan Shi Gengxin Hao Jun Chen Junling Wang Wuyin Weng College of Ocean Food and Biological Engineering Jimei UniversityXiamen 361021China Engineering Research Center of the Modern Technology for Eel Industry Ministry of EducationXiamen 361021China

A water-soluble polysaccharide from abalone muscle(AMPP)was *** contents of carbohydrate,protein,uronic acid,and sulfate in AMPP were 83.5%,0.5%,2.7%,and 2.6%,***-performance liquid chromatography analysis indicated that AMPP was homogeneous and had an average molecular weight of approximately 3.2 *** main monosaccharides of AMPP were glucose(Glc)and mannose with a molar ratio of 99.7:*** structural characteristics of AMPP were elucidated through methylation analysis,Fourier transform infrared spectroscopy,and nuclear magnetic resonance *** linkages of AMPP consisted of terminal,1,4-linked,1,6-linked,and 1,4,6-linked Glcp with a molar ratio of 3.1:7.2:1.0:*** one repeat unit of the proposed AMPP structure,the backbone chain was composed of eight 1→4 glycosidic bonds and one 1→6 glycosidic bond,with three branch chains linked by 1→6 glycosidic *** addition,AMPP was found to possess potent immunostimulatory activity via rising phagocytosis of RAW264.7 cells and promoting secretion of TNF-α.

关键词： Polysaccharide Abalone muscle structural characterization Immunostimulatory activity Nuclear magnetic resonance spectra

structural characterization and Aquatic Toxicity Prediction of Esters

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Chinese Journal of structural Chemistry 2021年第6期40卷 711-721,683页

作者： LI Jian-Feng LIAO Li-Min College of Chemistry and Chemical Engineering Neijiang Normal UniversityNeijiang 641100China Key Laboratory of Fruit Waste Treatment and Resource Recycling of Sichuan Provincial College Neijiang 641100China

Based on the three-dimensional structures of the compounds,the structures of 48 ester compounds were expressed *** multiple linear regression and partial least-squares regression,the relationship models between ester compound structures and aquatic toxicity log(1/IGC50)were *** correlation coefficients(R2)of the models were 0.9974 and 0.9940,and the standard deviations(SD)were 0.0469 and 0.0646,*** stability of the models was evaluated by the leave-one-out internal *** correlation coefficients(RCV2)of the models of interactive tests were 0.9939 and 0.8952,and the standard deviation(SDCV)was 0.0715 and 0.0925,*** external samples were used to test the predictive ability of the models,and the correlation coefficients(Rtest2)of the external predictions were 0.9955 and 0.9955,and the standard deviations(SDtest)were 0.0720 and 0.0716,*** molecular structure descriptors could successfully represent the structural characteristics of the compounds,and the built models had good fitting effects,strong stability and high prediction *** present study has a good reference value for the study of the structure-toxicity relationship of toxic compounds in the environment.

关键词： ester compounds structural characterization aquatic toxicity simulation prediction

structural characterization of a novel marine polysaccharide from mussel and its antioxidant activity in RAW264.7 cells induced by H_(2)O_(2)

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Food Bioscience 2022年第3期47卷 716-727页

作者： Xing-Wei Xiang Rui Wang Hui Chen Yu-Feng Chen Guo-Xin Shen Shu-Lai Liu Pei-Long Sun Lin Chen College of Food Science and Technology Zhejiang University of TechnologyHangzhou Zhejiang310014China Key Laboratory of Marine Fishery Resources Exploitment & Utilization of Zhejiang Province Hangzhou310014China Collaborative Innovation Center of Seafood Deep Processing Dalian Polytechnic UniversityDalian116034China Zhejiang Academy of Agricultural Sciences Hangzhou Zhejiang310014People’s Republic of China

In this study,a new type of water-soluble polysaccharide was extracted and purified from mussels,and its structure and cellular antioxidant levels were *** polysaccharide(MP 4.25×10^(3) Da)is composed mainly of glucose,with a small amount of galactosamine hydrochloride,glucosamine hydrochloride,and *** shows characteristic polysaccharide bands in Fourier transform NMR and infrared *** main chain connection mode of MP is the glycosidic bond of→4)-α-D-Glcp-(1→,and the end groupα-D-Glcp-(1→andα-D-Glcp-(1→6)-α-D-Glcp-(1→pass→4,6)-α-D-Glcp-(1→.The O-6 bond is connected to the main ***,MP could protect RAW264.7 cells against H_(2)O_(2)-induced oxidative stress by increasing catalase(CAT),glutathione peroxidase(GSH-Px),and superoxide dismutase(SOD)activities and reducing the content of malondialdehyde(MDA).This is expected to make MP an important member of the antioxidant family.

关键词： Mussel polysaccharide structural characterization Antioxidant activity

structural characterization of Lignins Isolated from Caragana sinica Using FT-IR and NMR Spectroscopy

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光谱学与光谱分析 2011年第9期31卷 2369-2376页

作者： XIAO Ling-ping SHI Zheng-jun XU Feng SUN Run-cang Amar K Mohanty College of Material Science and Technology Beijing Forestry University Beijing 100083 China State Key Laboratory of Pulp and Paper Engineering South China University of Technology Guangzhou 510640 China Department of Plant Agriculture Bioproducts Discovery and Development Centre (BDDC)University of Guelph Guelph Ontario N1G 2Wl Canada

In order to efficiently explore and use woody biomass,six lignin fractions were isolated from dewaxed Caragana sinica via successive extraction with organic solvents and alkaline *** lignin structures were characterized by Fourier transform infrared spectroscopy(FT-IR) and 1D and 2D Nuclear Magnetic Resonance(NMR).FT-IR spectra revealed that the "core" of the lignin structure did not significantly change during the treatment under the conditions *** results of 1H and 13C NMR demonstrated that the lignin fraction L2,isolated with 70% ethanol containing 1% NaOH,was mainly composed of β-O-4 ether bonds together with G and S units and trace p-hydroxyphenyl *** on the 2D HSQC NMR spectrum,the ethanol organosolv lignin fraction L1,extracted with 70% ethanol,presents a predominance of β-O-4′ aryl ether linkages(61% of total side chains),and a low abundance of condensed carbon-carbon linked structures(such as ββ′,β-1′,and β-5′) and a lower S/G ***,a small percentage(ca.9%) of the linkage side chain was found to be acylated at the γ-carbon.

关键词： Caragana sinica Lignin structural characterization FT-IR NMR

Hydrothermal Synthesis and structural characterization of a Novel Organic-Inorganic Hybrid Compound {[Cu(2,2′-bpy)_2]_2-Mo_8O_(26)}

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Chinese Journal of Chemistry 2002年第1期20卷 22-28页

作者：王永慧陈立东胡长文王恩波贾恒庆胡宁海 Institute of Polyoxometalate Chemistry Faculty of Chemistry Northeast Normal University Changchun Jilin 130024 China Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022 China

A novel organic-inorganic hybrid compound {[Cu(2,2'-bpy)_2]_2Mo_8O_(26)} hasbeen hydrothermally synthesized and structurally characterized by single-crystal X-ray *** compound crystallizes in the orthorhombic space group, Pna2_1, with a = 2.4164(5), b =1.8281(4), c = 1.1877(2) nm, V = 5.247(2) nm^3, Z = 4, and final R_1 = 0.0331, wR_2 = 0.0727. Thestructure consists of discrete {[Cu(2,2'-bpy)_2]_2Mo_8O_(26)} clusters, constructed from aβ-octamolybdate subunit [Mo_8O_(26)]^(4-) covalently bonded to two [Cu(2,2'-bpy)_2]^(2+)coordination complex cations via bridging oxo groups. In addition, the spectroscopic properties andthermal behavior of this compound have been investigated by spectroscopic techniques (UV-vis, IR,Raman and EPR spectra) and TG analysis.

关键词： organic-inorganic hybrid compound octamolybdate transition metalcoordination complexes hydrothermal synthesis structural characterization

Synthesis and structural characterization of macroporous bioactive glass

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Journal of Central South University of Technology 2007年第3期14卷 301-304页

作者：周智华阮建明邹俭鹏周忠诚申雄军 State Key Laboratory of Powder Metallurgy Central South University College of Chemistry and Chemical Engineering Hunan University of Science and Technology Xiangtan 411201 China

Porous sol-gel glass of CaO-SiO2-P2O5 system with macropores larger than 100 μm was prepared by adding stearic acid as pore former when the sintering was carried out at 700 ℃ for *** sol-gel porous glass shows an amorphous structure. The diameter of the pore created by pore former varies from 100 to 300 μm, and macroporous glass has a narrow and small pore size distribution in mesoporous scale. The porosity and pore size of macroporous bioactive glass can be controlled.

关键词： macroporous glass sol-gel method synthesis structural characterization

Synthesis and structural characterization of Three New Inorganic “Host-guest”Polyoxomolybdates

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Chinese Journal of Chemistry 2003年第8期21卷 1066-1072页

作者：杨文斌卢灿忠庄鸿辉 State Key Laboratory of structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences

Since two interesting inorganic “host guest” polyoxomolybdates 1 and 2 have been reported previously, we have now succeeded in selectively isolating three new acetated “host guest” polyoxomolybdates 3—5, which considerably extend the range of structures in the cyclic polyoxomolybdate catalogue. 3 crystallizes in the triclinic space group P 1 with a =1 22235(1) nm, b =1 52977(2) nm, c =1 54022(1) nm, α =113 746(1)°, β =96 742(1)°, γ = 101 564(1)°, V =2 51892(4) nm 3, Z =1, D c=2 568 g·cm -3 . 4 and 5 crystallize in the monoclinic system: P 2(1)/ n , a =1 08298(2) nm, b =1 54029(1) nm, c = 2 78893(5) nm, β =94 2730(10)°, V =4 63929(12) nm 3, Z =2 and D c=2 671 g·cm -3 for 4, and C 2/ c , a =2 59907(8) nm, b =1 65992(3) nm, c =2 28473(7) nm, β = 93 4370(10)° , V =9 8392(5) nm 3, Z =4 and D c=2 556 g·cm -3 for 5. The structures of 3, 4 and 5 consist of 18 membered “host guest” polyoxoanions [{Na(X) 2}{( μ 3 OH) 4Mo V 8Mo VI 10 O 52 ( μ 2 CH 3COO) 2}] -( n +9) (X=CH 3COO - for 3, DMF for 4 and H 2O for 5), which are connected via Na + ions or hydrogen bonds into infinite extended frameworks.

关键词： inorganic “host guest” polyoxomolybdate synthesis structural characterization

Green Method, Optical and structural characterization of ZnO Nanoparticles Synthesized Using Leaves Extract of M. oleifera

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Journal of Renewable Materials 2022年第3期10卷 833-847页

作者： Jose Vulfrano Gonzalez-Fernandez Diego David Pinzon-Moreno Antony Alexander Neciosup-Puican Maria Veronica Carranza-Oropeza Facultad de Quimica e Ingenieria Quimica Universidad Nacional Mayor de San MarcosLima15081Peru Centro de Investigaciones Tecnologicas Biomedicas y MedioambientalesUniversidad Nacional Mayor de San MarcosLima15081Peru

ZnO nanoparticles(ZnO-NP)present innovative optical,electrical,and magnetic properties that depend on spe-cific characteristics,e.g.,size,distribution,and ***,these properties are essential to address various applications in areas such as electronics,medicine,energy,and *** addition,the performance of this ZnO-NP depends of their preparation which can be done by chemical,physical,and biological ***,nowadays,the main interest in developing ZnO-NP synthesis through biological methods bases on the decrease of use of toxic chemicals or energy applied to the procedures,making the process more cost-effective and environ-mentally ***,the large-scale production of nanoparticles by green synthesis remains a big challenge due to the complexity of the biological extracts used in chemical *** being the case,the preparation of ZnO-NP using Moringa oleifera extract as an alternative biological agent for capping and reduction in synthesis was evaluated in this ***,the results based on the analysis of the optical and structural characterization of the ZnO-NP obtained by employing UV-Vis,DLS,zeta potential,XRD,ATR-FTIR,and FE-SEM indicate mostly the presence of spherical nanosized material with a mean hydrodynamic diameter of 47.2 nm measured by DLS and a mean size diameter of 25 nm observed with FE-SEM ***,in FE-SEM images a homo-geneous dispersion and distribution is observed in the absence of agglutination,agglomeration,or generation of significant lumps of the *** XRD analysis showed that heat annealing induced the crystallite size favor-ing their *** obtained data confirm the synthesis of ZnO-NP and the absence of impurities associated with organic compounds in the annealed ***,those results and low-cost production pre-sent to the synthesized ZnO-NP by this biological method as a useful material in several applications.

关键词： ZnO nanoparticles green chemistry Moringa oleifera extract optical characterization structural characterization