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  1. Article ; Online: A Neuropeptide Y/F-like Polypeptide Derived from the Transcriptome of

    Chen, Qian / Liang, Zirong / Yue, Qian / Wang, Xiufen / Siu, Shirley Weng In / Pui-Man Hoi, Maggie / Lee, Simon Ming-Yuen

    Journal of natural products

    2022  Volume 85, Issue 6, Page(s) 1569–1580

    Abstract: Neuropeptides are a group of neuronal signaling molecules that regulate physiological and behavioral processes in animals. Here, we ... ...

    Abstract Neuropeptides are a group of neuronal signaling molecules that regulate physiological and behavioral processes in animals. Here, we used
    MeSH term(s) Animals ; Astrocytes ; Inflammation/chemically induced ; Inflammation/drug therapy ; Inflammation/metabolism ; Lipopolysaccharides/pharmacology ; Molecular Docking Simulation ; Neuropeptide Y/chemistry ; Neuropeptide Y/pharmacology ; Neuropeptides ; Transcriptome
    Chemical Substances Lipopolysaccharides ; Neuropeptide Y ; Neuropeptides
    Language English
    Publishing date 2022-06-13
    Publishing country United States
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ZDB-ID 304325-3
    ISSN 1520-6025 ; 0163-3864
    ISSN (online) 1520-6025
    ISSN 0163-3864
    DOI 10.1021/acs.jnatprod.2c00158
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: The action of Y-F co-doping in LiNi0.5Mn1.5O4 positive electrode materials

    Lin, Fangchang / Wu, Hongming / Chen, Tianci / Zhou, Dengfeng / Yan, Wei / Guo, Jianbing

    Powder technology. 2022 Sept., v. 409

    2022  

    Abstract: ... of spinel layered cathode material. In this work, pristine and Y-F co-doped LiNi₀.₄₉Mn₁.₄₉Y₀.₀₂O₄₋ₓFₓ (x = 0 ... of Y-F co-doped samples exhibited better rate capability. Moreover, the formation of microcracks ... within Y-F co-doped sample can be suppressed during cycles by Y³⁺ and F⁻ co-doping, which can enhance ...

    Abstract The addition of either yttrium or fluorine has been reported to enhance electrochemical properties of spinel layered cathode material. In this work, pristine and Y-F co-doped LiNi₀.₄₉Mn₁.₄₉Y₀.₀₂O₄₋ₓFₓ (x = 0.02, 0.04, 0.06) spinel powders were synthesized by a citric acid aided route. The correlation between structural, morphological and electrochemical properties of all four cathodic materials was systematically studied. Y³⁺ and F⁻ co-doping led to the morphological evolution of LiNi₀.₅Mn₁.₅O₄ material. The introduction of Y³⁺ and F⁻ ions decreased the content of Mn³⁺ ions and lattice volume, which can alleviate the Jahn-Teller distortion and maintain the stability of spinel structure. The predominantly disordered of Y-F co-doped samples exhibited better rate capability. Moreover, the formation of microcracks within Y-F co-doped sample can be suppressed during cycles by Y³⁺ and F⁻ co-doping, which can enhance the strength of crystal structure, resulting in better cyclic stability. The LiNi₀.₄₉Mn₁.₄₉Y₀.₀₂O₀.₃₄F₀.₀₆ LNMO sample exhibited optimal electrochemical properties, delivering a discharge capacity of 136.044 mAh g⁻¹ after 200 cycles at 1C with superior retention of 96.8%, and the specific capacity reaching 102.030 mAh g⁻¹ at 5C. The synergistic influence of crystalline structure and morphology on electrochemical properties shows that Y-F co-doping has a positive impact on rate capability and cycling stability of LNMO materials.
    Keywords cathodes ; citric acid ; crystal structure ; electrochemistry ; fluorine ; technology ; yttrium
    Language English
    Dates of publication 2022-09
    Publishing place Elsevier B.V.
    Document type Article
    ISSN 0032-5910
    DOI 10.1016/j.powtec.2022.117812
    Database NAL-Catalogue (AGRICOLA)

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  3. Article: A Neuropeptide Y/F-like Polypeptide Derived from the Transcriptome of Turbinaria peltata Suppresses LPS-Induced Astrocytic Inflammation

    Chen, Qian / Liang, Zirong / Yue, Qian / Wang, Xiufen / Siu, Shirley Weng In / Pui-Man Hoi, Maggie / Lee, Simon Ming-Yuen

    Journal of natural products. 2022 June 13, v. 85, no. 6

    2022  

    Abstract: ... precursors were discovered. One neuropeptide Y/F-like peptide, named TpNPY, was identified and selected ...

    Abstract Neuropeptides are a group of neuronal signaling molecules that regulate physiological and behavioral processes in animals. Here, we used in silico mining to predict the polypeptide composition of available transcriptomic data of Turbinaria peltata. In total, 118 transcripts encoding putative peptide precursors were discovered. One neuropeptide Y/F-like peptide, named TpNPY, was identified and selected for in silico structural, in silico binding, and pharmacological studies. In our study, the anti-inflammation effect of TpNPY was evaluated using an LPS-stimulated C8-D1A astrocyte cell model. Our results demonstrated that TpNPY, at 0.75–3 μM, inhibited LPS-induced NO production and reduced the expression of iNOS in a dose-dependent manner. Furthermore, TpNPY reduced the secretion of proinflammatory cytokines. Additionally, treatment with TpNPY reduced LPS-mediated elevation of ROS production and the intracellular calcium concentration. Further investigation revealed that TpNPY downregulated the IKK/IκB/NF-κB signaling pathway and inhibited expression of the NLRP3 inflammasome. Through molecular docking and using an NPY receptor antagonist, TpNPY was shown to have the ability to interact with the NPY Y1 receptor. On the basis of these findings, we concluded that TpNPY might prevent LPS-induced injury in astrocytes through activation of the NPY-Y1R.
    Keywords antagonists ; astrocytes ; calcium ; computer simulation ; cytokines ; dose response ; inflammasomes ; inflammation ; models ; neurons ; polypeptides ; secretion ; transcriptome ; transcriptomics
    Language English
    Dates of publication 2022-0613
    Size p. 1569-1580.
    Publishing place American Chemical Society and American Society of Pharmacognosy
    Document type Article
    ZDB-ID 304325-3
    ISSN 1520-6025 ; 0163-3864
    ISSN (online) 1520-6025
    ISSN 0163-3864
    DOI 10.1021/acs.jnatprod.2c00158
    Database NAL-Catalogue (AGRICOLA)

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  4. Article ; Online: Local magnetic delivery of adeno-associated virus AAV2(quad Y-F)-mediated BDNF gene therapy restores hearing after noise injury.

    Mukherjee, Subhendu / Kuroiwa, Maya / Oakden, Wendy / Paul, Brandon T / Noman, Ayesha / Chen, Joseph / Lin, Vincent / Dimitrijevic, Andrew / Stanisz, Greg / Le, Trung N

    Molecular therapy : the journal of the American Society of Gene Therapy

    2021  Volume 30, Issue 2, Page(s) 519–533

    Abstract: ... vector (AAV2(quad Y-F)) to deliver brain-derived neurotrophic factor (BDNF) gene therapy into the rat ... accumulates and distributes the SPION-tagged AAV2(quad Y-F)-BDNF vector into the inner ear. We also found ... that AAV2(quad Y-F) efficiently transfects cochlear hair cells and enhances BDNF gene expression. Enhanced ...

    Abstract Moderate noise exposure may cause acute loss of cochlear synapses without affecting the cochlear hair cells and hearing threshold; thus, it remains "hidden" to standard clinical tests. This cochlear synaptopathy is one of the main pathologies of noise-induced hearing loss (NIHL). There is no effective treatment for NIHL, mainly because of the lack of a proper drug-delivery technique. We hypothesized that local magnetic delivery of gene therapy into the inner ear could be beneficial for NIHL. In this study, we used superparamagnetic iron oxide nanoparticles (SPIONs) and a recombinant adeno-associated virus (AAV) vector (AAV2(quad Y-F)) to deliver brain-derived neurotrophic factor (BDNF) gene therapy into the rat inner ear via minimally invasive magnetic targeting. We found that the magnetic targeting effectively accumulates and distributes the SPION-tagged AAV2(quad Y-F)-BDNF vector into the inner ear. We also found that AAV2(quad Y-F) efficiently transfects cochlear hair cells and enhances BDNF gene expression. Enhanced BDNF gene expression substantially recovers noise-induced BDNF gene downregulation, auditory brainstem response (ABR) wave I amplitude reduction, and synapse loss. These results suggest that magnetic targeting of AAV2(quad Y-F)-mediated BDNF gene therapy could reverse cochlear synaptopathy after NIHL.
    MeSH term(s) Animals ; Brain-Derived Neurotrophic Factor/genetics ; Brain-Derived Neurotrophic Factor/metabolism ; Cochlea/metabolism ; Dependovirus/genetics ; Evoked Potentials, Auditory, Brain Stem ; Genetic Therapy/methods ; Hearing ; Magnetic Phenomena ; Rats
    Chemical Substances Brain-Derived Neurotrophic Factor
    Language English
    Publishing date 2021-07-21
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2010592-7
    ISSN 1525-0024 ; 1525-0016
    ISSN (online) 1525-0024
    ISSN 1525-0016
    DOI 10.1016/j.ymthe.2021.07.013
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: BiOX/BiOY (X, Y = F, Cl, Br, I) superlattices for visible light photocatalysis applications

    Wang, Guangzhao / Luo, Xukai / Huang, Yuhong / Kuang, Anlong / Yuan, Hongkuan / Chen, Hong

    RSC advances. 2016 Sept. 23, v. 6, no. 94

    2016  

    Abstract: The BiOX/BiOY (X, Y = F, Cl, Br, I, X ≠ Y) systems have been investigated as possible visible light ... photocatalysts in contrast with the BiOX (X = F, Cl, Br, I) systems by using hybrid density functional ... electronic states. Besides, the relative positions of X p states and Y p states for BiOX/BiOY systems are ...

    Abstract The BiOX/BiOY (X, Y = F, Cl, Br, I, X ≠ Y) systems have been investigated as possible visible light photocatalysts in contrast with the BiOX (X = F, Cl, Br, I) systems by using hybrid density functional calculations. All the BiOX/BiOY systems have indirect bandgaps, and all the bandgaps of BiOX/BiOY systems we considered are between the bandgaps of BiOX and BiOY systems. The calculated bandgaps for BiOF/BiOCl, BiOF/BiOBr, BiOF/BiOI, BiOCl/BiOBr, BiOCl/BiOI, and BiOBr/BiOI are respectively 3.86, 3.41, 2.74, 2.99, 2.30, and 2.23 eV. The maximum absorption wavelength increases in the order of BiOF, BiOF/BiOCl, BiOCl, BiOF/BiOBr, BiOCl/BiOBr, BiOBr, BiOF/BiOI, BiOCl/BiOI, BiOBr/BiOI, and BiOI. The conduction band edges for all the BiOX/BiOY systems originate from Bi 6p states, but the valance band edges are contributed by different electronic states. Besides, the relative positions of X p states and Y p states for BiOX/BiOY systems are different, which should be attributed to the different p orbital energies of X and Y atoms. Due to the conduction band maximum is lower than the hydrogen reduction potential, all the BiOX and BiOX/BiOY systems are thermodynamically unfavorable for hydrogen production. Meanwhile, owing to the suitable bandgaps and band edge positions, the BiOF/BiOI, BiOCl/BiOBr, BiOCl/BiOI, and BiOBr/BiOI superlattices are possible visible light photocatalysts for degradation of organic pollutants.
    Keywords absorption ; bismuth ; bromine ; chlorine ; fluorine ; hydrogen ; hydrogen production ; iodine ; light ; photocatalysis ; photocatalysts ; pollutants ; thermodynamics ; wavelengths
    Language English
    Dates of publication 2016-0923
    Size p. 91508-91516.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ISSN 2046-2069
    DOI 10.1039/c6ra14915d
    Database NAL-Catalogue (AGRICOLA)

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  6. Article ; Online: 3c/4e [small sigma, Greek, circumflex]-type long-bonding competes with ω-bonding in noble-gas hydrides HNgY (Ng = He, Ne, Ar, Kr, Xe, Rn; Y = F, Cl, Br, I): a NBO/NRT perspective.

    Zhang, Guiqiu / Li, Hong / Weinhold, Frank / Chen, Dezhan

    Physical chemistry chemical physics : PCCP

    2016  Volume 18, Issue 11, Page(s) 8015–8026

    Abstract: ... HNgY (Ng = He, Ne, Ar, Kr, Xe, Rn; Y = F, Cl, Br, I) to gain quantitative insight into the resonance ... Noble-gas hydrides HNgY are frequently described as a single ionic form (H-Ng)(+)Y(-). We apply ... represented as a resonance hybrid of three leading resonance structures, namely, H-Ng(+ -):Y (I), H:(- +)Ng-Y ...

    Abstract Noble-gas hydrides HNgY are frequently described as a single ionic form (H-Ng)(+)Y(-). We apply natural bond orbital (NBO) and natural resonance theory (NRT) analyses to a series of noble-gas hydrides HNgY (Ng = He, Ne, Ar, Kr, Xe, Rn; Y = F, Cl, Br, I) to gain quantitative insight into the resonance bonding of these hypervalent molecules. We find that each of the studied species should be better represented as a resonance hybrid of three leading resonance structures, namely, H-Ng(+ -):Y (I), H:(- +)Ng-Y (II), and H^Y (III), in which the "ω-bonded" structures I and II arise from the complementary donor-acceptor interactions nY → σ*HNg and nH → σ*NgY, while the "long-bond" ([small sigma, Greek, circumflex]-type) structure III arises from the nNg → [small sigma, Greek, circumflex]*HY/[small sigma, Greek, circumflex]HY interaction. The bonding for all of the studied molecules can be well described in terms of the continuously variable resonance weightings of 3c/4e ω-bonding and [small sigma, Greek, circumflex]-type long-bonding motifs. Furthermore, we find that the calculated bond orders satisfy a generalized form of "conservation of bond order" that incorporates both ω-bonding and long-bonding contributions [viz., (bHNg + bNgY) + bHY = bω-bonding + blong-bonding = 1]. Such "conservation" throughout the title series implies a competitive relationship between ω-bonding and [small sigma, Greek, circumflex]-type long-bonding, whose variations are found to depend in a chemically reasonable manner on the electronegativity of Y and the outer valence-shell character of the central Ng atom. The calculated bond orders are also found to exhibit chemically reasonable correlations with bond lengths, vibrational frequencies, and bond dissociation energies, in accord with Badger's rule and related empirical relationships. Overall, the results provide electronic principles and chemical insight that may prove useful in the rational design of noble-gas hydrides of technological interest.
    Language English
    Publishing date 2016-03-21
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1476244-4
    ISSN 1463-9084 ; 1463-9076
    ISSN (online) 1463-9084
    ISSN 1463-9076
    DOI 10.1039/c5cp07965a
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Facile Preparation of BaCl x F y for the Catalytic Dehydrochlorination of 1-Chloro-1,1-Difluoroethane to Vinylidene Fluoride

    Wei Yu / Wenfeng Han / Yongnan Liu / Jiaqin Lu / Hong Yang / Bing Liu / Haodong Tang / Aimin Chen / Ying Li

    Catalysts, Vol 10, Iss 377, p

    2020  Volume 377

    Abstract: BaCl x F y as well as BaF 2 and BaClF catalysts were prepared by solid-state reaction at room ... The industrial manufacture of vinylidene fluoride (VDF) is carried out at 600–700 °C, whereas the BaCl x F y catalysts ... temperature with Ba(OH) 2 as the precursor and NH 4 F/NH 4 Cl as the F and Cl sources. The catalysts were ...

    Abstract BaCl x F y as well as BaF 2 and BaClF catalysts were prepared by solid-state reaction at room temperature with Ba(OH) 2 as the precursor and NH 4 F/NH 4 Cl as the F and Cl sources. The catalysts were applied for the dehydrochlorination of 1-chloro-1,1-difluoroethane to vinylidene fluoride at 350 °C. The industrial manufacture of vinylidene fluoride (VDF) is carried out at 600–700 °C, whereas the BaCl x F y catalysts provided a promising pathway to produce VDF at much lower temperatures. Unfortunately, the selectivity of VDF over BaF 2 decreased from 94% to 84% along with the deactivation of the BaF 2 catalyst monotonically. In the presence of small amounts of Cl in BaF 2 , stabilized selectivity was achieved. Over BaCl 0.05 F 0.95 , BaCl 0.1 F 0.9 and BaCl 0.25 F 0.75 , no decrease in VDF selectivity was observed. Clearly, the presence of small amounts Cl during solid-state preparation inhibited the growth of BaF 2 crystalline significantly. Far smaller particles were achieved. The particle size, or more precisely, the crystal size of the barium catalyst played a major role in the catalytic performance. In addition to the crystal growth, the presence of small amounts of Cl during catalyst preparation changed the chemical state of Ba, and therefore the adsorption and activation of the C–Cl bond for HCFC-142b were altered.
    Keywords barium chlorofluoride ; catalytic pyrolysis ; barium fluoride ; dehydrochlorination ; 1-chloro-1,1-difluoroethane ; vinylidene fluoride ; Chemical technology ; TP1-1185 ; Chemistry ; QD1-999
    Subject code 290
    Language English
    Publishing date 2020-04-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: Resonance bonding in XNgY (X = F, Cl, Br, I; Ng = Kr or Xe; Y = CN or NC) molecules: an NBO/NRT investigation.

    Song, Junjie / Su, Yue / Jia, Yanping / Chen, Lusheng / Zhang, Guiqiu

    Journal of molecular modeling

    2018  Volume 24, Issue 6, Page(s) 129

    Abstract: Several noble-gas-containing molecules XNgY were observed experimentally. However, the bonding in such systems is still not understood. Using natural bond orbital and natural resonance theory (NBO/NRT) methods, the present work investigated bonding of ... ...

    Abstract Several noble-gas-containing molecules XNgY were observed experimentally. However, the bonding in such systems is still not understood. Using natural bond orbital and natural resonance theory (NBO/NRT) methods, the present work investigated bonding of the title molecules. The results show that each of the studied XNgY molecules should be better described as a resonance hybrid of ω-bonding and [Formula: see text]-type long-bonding structures: X:
    Language English
    Publishing date 2018-05-07
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1284729-x
    ISSN 0948-5023 ; 1610-2940
    ISSN (online) 0948-5023
    ISSN 1610-2940
    DOI 10.1007/s00894-018-3665-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Saturnene revealed: X-ray crystal structure of D(5d)-C(60)F(20) formed in reactions of C(60) with A(x)MF(y) fluorinating agents (A=alkali metal; M=3d metal).

    Shustova, Natalia B / Mazej, Zoran / Chen, Yu-Sheng / Popov, Alexey A / Strauss, Steven H / Boltalina, Olga V

    Angewandte Chemie (International ed. in English)

    2010  Volume 49, Issue 4, Page(s) 812–815

    MeSH term(s) Crystallography, X-Ray ; Fullerenes/chemistry ; Halogenation ; Metals/chemistry ; Molecular Conformation
    Chemical Substances Fullerenes ; Metals ; fullerene C60 (NP9U26B839)
    Language English
    Publishing date 2010
    Publishing country Germany
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 2011836-3
    ISSN 1521-3773 ; 1433-7851
    ISSN (online) 1521-3773
    ISSN 1433-7851
    DOI 10.1002/anie.200905832
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Do single-electron lithium bonds exist? Prediction and characterization of the H3C...Li-Y (Y=H, F, OH, CN, NC, and CCH) complexes.

    Li, Ying / Wu, Di / Li, Zhi-Ru / Chen, Wei / Sun, Chia-Chung

    The Journal of chemical physics

    2006  Volume 125, Issue 8, Page(s) 84317

    Abstract: A new kind of single-electron lithium bonding complexes H(3)C...LiY (Y=H, F, OH, CN, NC, and CCH ... bend opposite to the LiY molecule and the Li-Y bond elongates. Abnormally, the three H(3)C...LiY (Y=CN ... NC, and CCH) complexes exhibit blueshifted Li-Y stretching frequencies along with the elongated Li-Y ...

    Abstract A new kind of single-electron lithium bonding complexes H(3)C...LiY (Y=H, F, OH, CN, NC, and CCH) was predicted and characterized in the present paper. Their geometries (C(3v)) with all real harmonic vibrational frequencies were obtained at the MP2/aug-cc-pVTZ level. For each H(3)C...LiY complex, single-electron Li bond is formed between the unpaired electron of CH(3) radical and positively charged Li atom of LiY molecule. Due to the formation of the single-electron Li bond, the C-H bonds of the CH(3) radical bend opposite to the LiY molecule and the Li-Y bond elongates. Abnormally, the three H(3)C...LiY (Y=CN, NC, and CCH) complexes exhibit blueshifted Li-Y stretching frequencies along with the elongated Li-Y bonds. Natural bond orbital analyses suggest ca. 0.02 electron transfer from the methyl radical (CH(3)) to the LiY moiety. In the single occupied molecular orbitals of the H(3)C...LiY complexes, it is also seen that the electron could of the CH(3) radical approaches the Li atom. The single-electron Li bond energies are 5.20-6.94 kcal/mol for the H(3)C...LiY complexes at the CCSD(T)aug-cc-pVDZ+BF (bond functions) level with counterpoise procedure. By comparisons with some related systems, it is concluded that the single-electron Li bonds are stronger than single-electron H bonds, and weaker than conventional Li bonds and pi-Li bonds.
    MeSH term(s) Biophysics/methods ; Chemistry, Physical/methods ; Cyanides/chemistry ; Electrons ; Hydrogen/chemistry ; Hydrogen Bonding ; Hydroxides/chemistry ; Lithium/chemistry ; Models, Chemical ; Models, Molecular ; Models, Theoretical ; Molecular Conformation ; Vibration
    Chemical Substances Cyanides ; Hydroxides ; Hydrogen (7YNJ3PO35Z) ; hydroxide ion (9159UV381P) ; Lithium (9FN79X2M3F)
    Language English
    Publishing date 2006-08-28
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 3113-6
    ISSN 1089-7690 ; 0021-9606
    ISSN (online) 1089-7690
    ISSN 0021-9606
    DOI 10.1063/1.2339020
    Database MEDical Literature Analysis and Retrieval System OnLINE

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