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Chinese Journal of Polymer Science 2020年第11期38卷 1267-1275,I0009页

作者： Yi Li Yan-Cun Yu Chang-Yu Han xian-Hong wang De-Xin Huang School of Materials Science and Engineering Jilin Jianzhu UniversityChangchun 730778China Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China

Sustainable blends of poly(propylene carbonate)(PPC)and stereocomplex polylactide(sc-PLA)were prepared by melt blending equimolar poly(L-lactic acid)(PLLA)and poly(D-lactide acid)(PDLA)with PPC to form sc-PLA crystals in situ in the melt blending *** seanning calorimetry analysis revealed that only sc-PLA,no homo-crystallization of PLLA or PDLA,formed in the PPC matrix as the sc-PLA con tent was more than 10 wt%.Very in triguingly,scan ning electronic microscopy observati on showed that sc-PLA was evenly dispersed in the PPC phase as spherical particles and the sizes of sc-PLA particles did not obviously increase with in creasing sc-PLA con *** a con seque nee,the rheological properties of PPC were greatly improved by incorporation of *** the sc-PLA con tent was 20 wt%,a percolati on n etwork structure was formed,and the blends showed solid-like *** sc-PLA particles could reinforce the PPC matrix,especially at a temperature above the glass transition temperature of ***,the Vicat softening temperature of PPC/sc-PLA blends could be increased compared with that of neat PPC.

关键词： Sustainable Polymer blends Poly(propylene carbonate) Stereocomplex polylactide

Anisotropic phononic crystal structure with low-frequency bandgap and heat flux manipulation

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Science China(Physics,Mechanics & Astronomy) 2020年第2期63卷 93-103页

作者： Ting Guo XiongWei Yang Qian Geng Zhen Li YueMing Li xian wang Hu Zhang State Key Laboratory for Strength and Vibration of Mechanical Structures Shaanxi Key Laboratory of Environment and Control for Flight Vehicle School of Aerospace Xi’an Jiaotong University

This study presents a two-dimensional phononic crystal with heat flux manipulation and wide bandgaps of out-of-plane modes within the low-frequency range. The anisotropic matrix made of spiral-multilayered materials with different thermal conductivities, and the coating layer inserted with metal are designed for heat flux manipulation. Rubber-coated metal cylinders are periodically embedded in the anisotropic matrix to obtain the low-frequency bandgaps of out-of-plane modes. Numerical simulation is carried out to validate the heat and elastic characteristics of the spiral-multilayered anisotropic structure and reveal the effects of the laying angle and temperature on the bandgaps. Subsequently, a spiral-multilayered plate with periodic structures is studied, which shows an obvious vibration attenuation in the frequency ranges of the bandgaps and a deflected heat flux from the initial propagation direction. In the experimental investigation, the multi-phase spiral-multilayered anisotropic plate is simplified to a single-phase anisotropic plate made of aluminum. The characteristics of this type of anisotropic phononic crystal structure may pave the way for the design of a new kind of thermo-acoustic metamaterial serving in combined thermal and acoustic environments.

关键词： heat flux manipulation bandgap anisotropic structure thermal stress spiral-multilayered structure

Coordination environments build up and tune a superior synergistic “genome” toward novel trifunctional (TM-N_(x)O_(4−x))@g- C_(16)N_(3)-H_(3): High-throughput inspection of ultra-high activity for water splitting and oxygen reduction reactions

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Nano Research 2024年第4期17卷 2337-2351页

作者： Chunyao Fang xian wang Qiang Zhang Xihang Zhang Chenglong Shi Jingcheng Xu Mengyu Yang Department of Physics University of Shanghai for Science and TechnologyShanghai 200093China School of Materials and Chemistry University of Shanghai for Science and TechnologyShanghai 200093China

Emerging as a prominent area of focus in energy conversion and storage technologies,the development of highly active metal-based single-atom catalysts(SACs)holds great signiﬁcance in searching alternatives to replace precious metals toward the efficient,stable,and low-cost hydrogen evolution reaction(HER),as well as the oxygen evolution reaction(OER)and the oxygen reduction reaction(ORR).Combining the tremendous tunability of ligand and coordination environment with rich metal-based electrocatalysts can create breakthrough opportunities for achieving both high stability and ***,we propose a novel and stable holey graphene-like carbon nitride monolayer g-C_(16)N5(N_(4)@g-C_(16)N_(3))stoichiometries interestingly behaving as a natural substrate for constructing SACs((TM-N_(4))@g-C_(16)N_(3)),whose evenly distributed holes map rich and uniform nitrogen coordination positions with electron-rich lone pairs for anchoring transition metal(TM)***,we employed density functional theory(DFT)calculations to systematically investigate the electrocatalytic activity of(TM-N_(4))@g-C_(16)N_(3) toward HER/OER/ORR,meanwhile considering the synergistic modulation of H-loading and O-coordination((TM-N_(x)O_(4-x))@g-C_(16)N_(3)^(-)H_(3),x=0–4).Together a“four-step procedure”screening mechanism with the first-principles high-throughput calculations,we find that(Rh-N_(4))and(Ir-N_(2)O_(2)-II)distributed on g-C_(16)N_(3)^(-)H_(3) can modulate the adsorption strength of the adsorbates,thus achieving the best HER/OER/ORR performance among 216 candidates,and the lowest overpotential of 0.098/0.3/0.46 V and 0.06/0.48/0.45 V,***,the d-band center,crystal orbital Hamilton population(COHP),and molecular orbitals are used to reveal the OER/ORR activity ***,the Rh/Ir-d orbital is dramatically hybridized with the O-p orbital of the oxygenated adsorbates,so that the lone-electrons incipiently locate at the antibonding orbital pair up and popula

关键词： single atom catalysts loading and coordination hydrogen evolution reaction oxygen evolution reaction oxygen reduction reaction

Ultracycles consisting of macrocycles

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Chinese Chemical Letters 2024年第5期35卷 183-188页

作者： Wen-Hui Mi Teng-Yu Huang Yu-Fei Ao Xu-Dong wang Qi-Qiang wang De-xian wang Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Molecular Recognition and FunctionInstitute of ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Presented here is a one-pot strategy starting from rationally designed macrocyclic precursors for the diverse construction of sophisticated *** type and amount of the base were found to significantly influence the macrocyclization *** use of 4.0 *** resulted in ultracycles of both types A and B while the presence of CsF larger than 6.0 *** only type B *** of anion template increased the total yields and affected the distribution of the *** ultracycles can accommodate large organic dicarboxylates anions via multiple anion-πand hydrogen bonds,and show selectivity to the size-matched heptanedioate(C7^(2−)).Based on all possible species and relevant equilibrium constants as well as material and charge balances,a numerical iterative algorithm was developed and applied to fit the association constants of B2H with dicarboxylates from glutarate(C5^(2−))to octanedioate(C8^(2−)),which gave association constants up to 10^(3) L/mol.

关键词： Ultracycles Diversity-oriented synthesis Anion recognition Anion-πinteraction

Temperature-insensitive microwave absorption of TiB2-Al_(2)O_(3)/MgAl_(2)O_(4) ceramics based on controllable electrical conductivity

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Science China(Technological Sciences) 2021年第6期64卷 1250-1263页

作者： LIU XiongZhang ZHANG Sealing LUO Hui CHEN Fu LI DongMeng wang xian GONG RongZhou School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China College of Mechanical and Electronic Engineering Northwest Agriculture and Forestry UniversityYangling 712100China School of Information Science and Engineering Wuhan University of Science and TechnologyWuhan 430081China

The design of the high-temperature microwave absorbing materials (MAMs) with temperature-insensitive and considerable microwave absorption (MA) capacity is a tremendous *** B2-Al_(2)O_(3)/Mg Al_(2)O_(4) MAMs are prepared by the spark plasma sintering (SPS).Further,the influences of the Al_(2)O_(3) content on the flexural strength,thermal stability,high-temperature electrical conductivity,dielectric and MA properties are *** results show that the Al_(2)O_(3) content is associated with flexural strength,high-temperature thermal stability,electrical conductivity,dielectric and MA ***,the temperatureinsensitive and considerable MA properties with the minimum reflection loss (RLmin) ranging from -19.4 to -14.3 dB and the effective absorption bandwidth (EAB,RL<-5 dB) of 3.19–3.55 GHz are attained at 25°C–700°C in 8.2–12.4 GHz as the Al_(2)O_(3) content increases from 70.6 wt%to 80.6 wt%.This is ascribed to the compensating effect of the positive and negative temperature coefficient materials on the high-temperature electrical conductivity as well as the co-play of the dipolar and interfacial polarization at elevated ***,Ti B2-Al_(2)O_(3)/Mg Al_(2)O_(4) ceramics exhibit the ideal prospect as the high-temperature MAMs.

关键词： titanium boride aluminium oxide magnesium-aluminate spinel high-temperature electrical conductivity temperatureinsensitive microwave absorption properties

Study on Kinetics of light-intensity adaptation of Dicrateria inornata.

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Acta Oceanologica Sinica 1994年第2期13卷 237-242页

作者： wang xian and Li Wenquan

Light-saturation curves of Dicrateria inornata at various temperatures were determined by using 14C-la belling technique. Kinetics of light-intensity adapation was also analyzed in combination with Chl.a determination and cell enumeration measurements. The response of cellular Chl. a in light transition processes can be appoximately described with the first order kinetic model. The model between temperature and maximum growth rate was established by using the Arrhenius equation.

关键词： High light low light light-saturation cruve Dicrateria inornata

A Rapid Solid-phase Synthesis to Soluble Oligothiophene Molecular Wires

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Chinese Chemical Letters 2006年第4期17卷 437-440页

作者： Hong Ming ZHANG xian Hong wang Xiao Jiang ZHAO Ji LI Fo Song wang Polymer Material Engineering Lab Changchun Institute of Applied Chemistry CAS Changchun 130022

A novel method for the preparation of oligothiophene molecular wires is described via a bi-directional solid-phase synthesis. Using an alternating sequence of bromination and Stille coupling reactions, oligomers were ... 详细信息

关键词： Solid-phase synthesis molecular wires oligothiophene.

Clinicopathological factors associated with pathological upgrading from biopsy to prostatectomy in patients with ISUP grade group≤2 prostate cancer

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Asian Journal of Andrology 2022年第5期24卷 487-493页

作者： Xing Li Zhi-xian wang Yun-Peng Zhu Jing wang Yi-Sheng Yin Xiao-Yong Zeng Department of Urology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

We performed this study to investigate pathological upgrading from biopsy to prostatectomy and clinicopathological factors associated with grade group(GG)upgrading in patients with International Society of Urological Pathology(ISUP)GG 1 and 2 prostate cancer(PCa)in a Chinese *** included patients diagnosed with PCa with ISUP GG 1 and 2 at biopsy,who underwent RP at our ***-and postoperative clinical variables were *** and multivariate logistic regression analyses were conducted to identify independent factors associated with GG *** in GG upgraded group had higher total prostatespecific antigen(tPSA;median:14.43 ng ml^(−1) vs 10.52 ng ml^(−1),P=0.001)and PSA density(PSAD;median:0.45 ng ml^(−2) vs 0.27 ng ml^(−2),P3(86.4%vs 67.9%,P3(odds ratio[OR]:2.471,95%confidence interval[CI]:1.132–5.393;P=0.023),higher PSAD(P=0.001),and GG in biopsy(OR:0.241,95%CI:0.123–0.471;P3,and PNI were independent factors of GG *** factors should be considered for patients with ISUP grade≤2 PCa.

关键词： biopsy grade group prostate cancer radical prostatectomy upgrading

Sirolimus improves the prognosis of liver recipients with hepatocellular carcinoma:A single-center experience

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Hepatobiliary & Pancreatic Diseases International 2023年第1期22卷 34-40页

作者： Peng Liu Xin wang Huan Liu Shu-xian wang Qing-Guo Xu Lin wang Xiao Xu Jin-Zhen Cai Organ Transplantation Center The Affiliated Hospital of Qingdao UniversityQingdao 266100China Institute of Organ Donation and Transplantation Department of MedicineQingdao UniversityQingdao 266100China Department of Hepatobiliary and Pancreatic Surgery The Center for Integrated Oncology and Precision MedicineAffiliated Hangzhou First People’s HospitalZhejiang University School of MedicineHangzhou 310003China National Health Commission(NHC)Key Laboratory of Combined Multi-Organ Transplantation Hangzhou 310003China Institute of Organ Transplantation Zhejiang UniversityHangzhou 310003China

Background:Tumor recurrence after liver transplantation(LT)for selective patients diagnosed with hepatocellular carcinoma(HCC)in the setting of cirrhosis is the greatest challenge effecting the prognosis of these *** aim of this study was to evaluate the efficacy of sirolimus on the prognosis for these ***:The data from 193 consecutive HCC patients who had undergone LT from January 2015 to December 2019 were retrospectively *** patients were divided into the sirolimus group[patients took sirolimus combined with calcineurin inhibitors(CNIs)(n=125)]and non-sirolimus group[patients took CNI-based therapy without sirolimus(n=68)].Recurrence-free survival(RFS)and overall survival(OS)were compared between the two *** prognostic factors and independent risk factors for RFS and OS were further ***:Non-sirolimus was an independent risk factor for RFS(HR=2.990;95%CI:1.050-8.470;P=0.040)and OS(HR=3.100;95%CI:1.190-8.000;P=0.020).A higher proportion of patients beyond Hangzhou criteria was divided into the sirolimus group(69.6%vs.80.9%,P=0.030).Compared with the non-sirolimus group,the sirolimus group had significantly better RFS(P<0.001)and OS(P<0.001).Further subgroup analysis showed similar ***:This study demonstrated that sirolimus significantly decreased HCC recurrence and prolonged RFS and OS in LT patients with different stage of HCC.

关键词： Hepatocellular carcinoma Liver transplantation Sirolimus Tumor recurrence Recurrence-free survival Overall survival

Cold plasma promotes Sertoli cell proliferation via AMPK–mTOR signaling pathway

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Journal of Integrative Agriculture 2022年第9期21卷 2700-2719页

作者： ZHANG Jiao-jiao LI Ya-qi SHI Mei wang Yu-sha TANG Yao wang xian-zhong Chongqing Key Laboratory of Forage and Herbivore College of Veterinary MedicineSouthwest UniversityChongqing 400715P.R.China

This study investigated cold plasmas for multiple biological applications. Our previous work has found dielectric barrier discharge plasma improves chicken sperm quality. The number of Sertoli cells(SCs) decides spermatogenesis. However, whether cold plasma can regulate SC proliferation remains unclear. This study explored the effects of cold plasma on immature chicken SC proliferation and the regulation mechanism. Results showed that cold plasma exposure at 2.4 W for 30 s twice with an interval of 6 h produced(P<0.05) the maximum SC viability, cell growth, and cell cycle progression. SC proliferation-promoting effect of cold plasma treatment was regulated by increasing(P<0.05) the adenosine triphosphate production and the respiratory enzyme activity in the mitochondria. This process was potentially mediated by the adenosine monophosphate-activated protein kinase(AMPK)–mammalian target of rapamycin(m TOR) signaling pathway, which was regulated by the micro RNA(mi RNA) targeting regulation directly and by the intracellular reactive oxygen species homeostasis indirectly. The cold plasma treatment increased(P<0.01) the mi R-7450-5 p expression and led to a decreased(P<0.01) AMPKα1 level. On the other hand, mi R-100-5 p expression was reduced(P<0.05) and led to an increased(P<0.05) m TOR level in SCs. A single-stranded synthetic mi R-7450-5 p antagomir and a double-stranded synthetic mi R-100-5 p agomir reduced(P<0.05) the SC proliferation. However, this could be ameliorated(P<0.05) by the cold plasma treatment. Our findings suggest that appropriate cold plasma treatment provides a safe strategy to improve SC proliferation, which is beneficial to elevating male chicken reproductive capacity.

关键词： cold plasma Sertoli cell proliferation AMPK mTOR miRNAs