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5 results on '"Wu-Fang Wang"'

1. Evaluation of Wine Fermentation Characteristics of Guizhou’s Five Specialty Fruits Based on the Composition of Organic Acids and Polyphenols

Author

CHEN Qiuzhu, XIE Hanyi, HE Jiaojiao, WU Fang, WANG Chunxiao

Subjects
fruit wine, organic acids, resveratrol, anthocyanins, tannins, Food processing and manufacture, TP368-456
Abstract

To evaluate the fermentation potential of Guizhou’s specialty fruits, the contents of organic acids and polyphenols juices in juices and laboratory prepared wines from crystal grapes, brier grapes, kiwifruits, golden prickly pears and blueberries grown in Guizhou were analyzed and compared with those of commercial wines. The results showed that the contents of organic acids and polyphenols varied significantly among the five fruit juices, with the highest contents of organic acids (72.30 g/L), total phenols (2 457.16 mg/L), and tannins (1 112.84 mg/L) being found in golden prickly pear juice and the lowest values (organic acids 7.63 g/L, total phenols 8.52 mg/L, and tannins 7.45 mg/L) in crystal grape juice. During the fermentation process, the contents of organic acids and polyphenols changed. The content of total organic acids significantly decreased in all wine samples, the contents of total phenols and anthocyanins increased in blueberry and brier grape wine, and the contents of total phenols and tannins decreased in kiwifruit and golden prickly pear wine but did not change significantly in crystal grape wine. Resveratrol was only detected in commercial red wine and blueberry wine at low levels ranging from 0.29 to 5.98 mg/L. Compared with commercial wines, laboratory prepared golden prickly pear wine had higher contents of organic acids, total phenols and tannins, and laboratory prepared kiwifruit wine had higher contents of organic acids. The anthocyanin content in laboratory prepared brier grape wine was the highest, which was two to three times higher than that of all commercial wines. To sum up, each of the specialty fruits from Guizhou has their own unique characteristics in the composition of organic acids and polyphenols, and their organic acid and polyphenol composition change differently after fermentation into wine. This study provides a theoretical basis for the selection of different technological methods such as maceration in wine processing from Guizhou’s specialty fruits and for the design of wine body from mixed fruit juices.

Published
2024
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2. Diversity of Lanthanide(III)–Organic Extended Frameworks with a 4,8-Disulfonyl-2,6-naphthalenedicarboxylic Acid Ligand: Syntheses, Structures, and Magnetic and Luminescent Properties

Author

Wu-Fang Wang, Yu-Ling Wang, Qing-Yan Liu, Ming-Sheng Wang, Jinkui Tang, and Zeng-Mei Shan

Subjects
Lanthanide, Coordination polymer, Ligand, Inorganic chemistry, Crystal structure, Inorganic Chemistry, Crystallography, chemistry.chemical_compound, chemistry, Metal-organic framework, Single-molecule magnet, Physical and Theoretical Chemistry, Isostructural, Luminescence
Abstract

A sulfonate-carboxylate ligand, 4,8-disulfonyl-2,6-naphthalenedicarboxylic acid (H(4)-DSNDA), and eight new lanthanide coordination polymers {[Pr(4)(OH)(4)(DSNDA)(2)(H(2)O)(12)](H(2)O)(10)}(n) (1), [Ln(H(2)-DSNDA)(0.5)(DSNDA)(0.5)(H(2)O)(5)](n) (Ln = La(2), Nd(3), Sm(4), Eu(5), Gd(6), and Dy(7)), and {[Er(H-DSNDA)(H(2)O)(4)](H(2)O)}(n) (8) have been synthesized. Detailed crystal structures of these compounds have been investigated. Compound 1 has a 3D framework featuring the unique cubane-shaped [Pr(4)(μ(3)-OH)(4)] clusters and is a binodal 4,8-connected network with (4(16)·6(12))(4(4)·6(2))(2) topology. Compounds 2-7 are isostructural and have 2D layered structures. Compound 8 is also a 2D layer but belongs to different structural types. The luminescence behavior of compound Eu(5) shows that the π-rich aromatic organic ligands efficiently transfer the absorbed light energy to the Eu(III) ions, thus enhancing the overall luminescent properties of compound Eu(5). The magnetic properties of all compounds except for the diamagnetic La(2) compound have been investigated. In addition, elemental analysis, IR spectra, and thermogravimetric analysis of these compounds are also described.

Published
2012

3. Ionothermal synthesis of a 3D zinc(II)-carboxylate coordination polymer with bcu topology based on heptanuclear [Zn7(μ4-O)2] cluster

Author

Ning Zhang, Jia-Jia Wei, Yu-Ling Wang, Qing-Yan Liu, and Wu-Fang Wang

Subjects
Tetrafluoroborate, Coordination polymer, chemistry.chemical_element, Crystal structure, Zinc, Topology, law.invention, Inorganic Chemistry, Solvent, chemistry.chemical_compound, chemistry, law, Ionic liquid, Materials Chemistry, Carboxylate, Physical and Theoretical Chemistry, Crystallization
Abstract

Compound {(EMIM)2[Zn7(μ4-O)2(1,4-ndc)6]}n (1) (EMIM = 1-ethyl-3-methylimidazolium and 1,4-ndc = 1,4-naphthalenedicarboxylate) has been synthesized by using the mixed ionic liquids of 1-ethyl-3-methylimidazolium tetrafluoroborate and 1-ethyl-3-methylimidazolium l -lactate as solvent. Compound 1 has a 3D anionic framework with bcu-(424·64) topology based on a unique heptanuclear [Zn7(μ4-O)(μ2-COO)10] cluster as secondary building unit. The imidazolium cation [EMIM]+ of the ionic liquid acting as extra framework charge-balancing species occupies the channels of the 3D anionic framework. The roles of the ionic liquid in ionothermal synthesis and crystallization of compound 1 are briefly discussed. The thermal and photoluminescent properties of compound 1 have also been investigated.

Published
2012

4. Protective effects of poly (butyl) cyanoacrylate nanoparticles containing vasoactive intestinal peptide against 6-hydroxydopamine-induced neurotoxicity in vitro

Author

Zhiran Xu, Zehua Liu, Xin-Fang Liang, Xuan Zhu, Wu-Fang Wang, Liang Lin, and Yu Liu

Subjects
Polysorbate, Neurons, Hydroxydopamine, Chemistry, Vasoactive intestinal peptide, Nanoparticle, Apoptosis, General Medicine, Enbucrilate, Cellular and Molecular Neuroscience, chemistry.chemical_compound, Neuroprotective Agents, Biochemistry, Cell Line, Tumor, Biophysics, Butyl cyanoacrylate, Humans, Nanoparticles, Viability assay, Fluorescein isothiocyanate, Oxidopamine, Fetal bovine serum, Vasoactive Intestinal Peptide
Abstract

The present study investigated brain delivery system of vasoactive intestinal peptide (VIP) adsorbed on poly (butyl cyanoacrylate) nanoparticles coated with polysorbate 80 (P80-poly (butyl) cyanoacrylate (PBCA)-nanoparticles (NPs)) and the neuroprotective effects on the formulation in the model of 6-hydroxydopamine (6-OHDA)-induced Parkinsonian dysfunction in the human neuroblastoma cell line SH-SY5Y. Drug-loaded nanoparticles were prepared by emulsion polymerization method using VIP and PBCA and then stirring with polysorbate 80. The resulting nanoparticles possessed high entrapment efficiency and favorable stability against CaCl2 or fetal bovine serum (FBS)-induced aggregation. Use of fluorescein isothiocyanate (FITC)-conjugated polysorbate 80-PBCA nanoparticles in confocal microscopy revealed that nanoparticles are located inside, while the FITC solution could not penetrate into the cells. The blank nanoparticles showed no significant effects on cell viability, indicating that they had no role in protection; however, polysorbate 80-modified VIP-loading PBCA nanoparticles showed enhanced cell viability compared to free VIP in 6-OHDA-mimic cellular model of Parkinson's disease. In addition, the nanoparticles strikingly increased the anti-apoptosis activity and restored the loss of mitochondrial membrane potential (MMP) significantly after the treatment of 6-OHDA. These results demonstrated that the activity of VIP was enhanced by polysorbate 80-PBCA nanoparticles compared to control solutions, suggesting that PBCA nanoparticles coated with polysorbate 80 could be an effective carrier system for VIP.

Published
2014

5. Diversity of Lanthanide(III)-Organic Extended Frameworks with a 4,8-Disulfonyl-2,6-naphthalenedicarboxylic Acid Ligand: Syntheses, Structures, and Magnetic and Luminescent Properties.

Author

Qing-Yan Liu, Wu-Fang Wang, Yu-Ling Wang, Zeng-Mei Shan, Ming-Sheng Wang, and Jinkui Tang

Subjects
*MAGNETIC properties of rare earth metals, *DICARBOXYLIC acids, *NAPHTHALENEACETIC acid, *SULFONATES, *LUMINESCENT probes, *THERMOGRAVIMETRY
Abstract

A sulfonate-carboxylate ligand, 4,8-disulfonyl-2,6-naphthalenedicarboxylic acid (H4-DSNDA), and eight new lanthanide coordination polymers {[Pr4(OH)4(DSNDA)2(H2O)12](H2O)10}n (1), [Ln(H2-DSNDA)0.5(DSNDA)0.5(H2O)5]n (Ln = La(2), Nd(3), Sm(4), Eu(5), Gd(6), and Dy(7)), and {[Er(H-DSNDA)(H2O)4](H2O)}n (8) have been synthesized. Detailed crystal structures of these compounds have been investigated. Compound 1 has a 3D framework featuring the unique cubane-shaped [Pr4(μ3-OH)4] clusters and is a binodal 4,8-connected network with (416∙612)(44∙62)2 topology. Compounds 2-7 are isostructural and have 2D layered structures. Compound 8 is also a 2D layer but belongs to different structural types. The luminescence behavior of compound Eu(5) shows that the π-rich aromatic organic ligands efficiently transfer the absorbed light energy to the Eu(III) ions, thus enhancing the overall luminescent properties of compound Eu(5). The magnetic properties of all compounds except for the diamagnetic La(2) compound have been investigated. In addition, elemental analysis, IR spectra, and thermogravimetric analysis of these compounds are also described. [ABSTRACT FROM AUTHOR]

Published
2012
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