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| 1 | The 2-axis stress component decoupling of {100} c-Si by using oblique backscattering micro-Raman spectroscopy显示文摘With the application of strain engineering in microelectronics,complex stress states are introduced into advanced semiconductor devices.However,there is still a lack of effective metrology for the decoupling analysis of the complex stress states in semiconductor materials.This paper presents an investigation on the 2-axis stress component decoupling of{100}monocrystalline silicon(c-Si)by using oblique backscattering micro-Raman spectroscopy.A spectral-mechanical model was established,and two practicable methods for actual stress decoupling analyses were proposed.The verification experiments demonstrated the correctness and applicability of the methods proposed in this paper. | DongHui Fu XiaoYong He LuLu Ma HuaDan Xing Tian Meng Ying Chang Wei Qiu | 2020 | Science China(Physics,Mechanics & Astronomy)2020，63，9： | 2 |
| 2 | Mechanical properties,components and decay resistance of Populus davidiana bioincised by Coriolus versicolor显示文摘The experiment was conducted to improve the decay resistance of wood by increasing the wood preservatives uptake and penetration depth by bioincising with Coriolus versicolor.The mechanical properties of bioincised Populus davidiana sapwood were measured.The changes of wood components(lignin,cellulose and hemicellulose)were analyzed by FTIR.The staining treatment using potassium permanganate was to measure the preservatives uptake and penetration depth in wood specimens.The decay resistance of bioincised specimens impregnated with IPBC and CA was assessed against C.versicolor and Gloeophyllum trabeum using bioincised P.davidiana sapwood and untreated controls.The results showed that the mechanical properties of the bioincised specimens were changed with the incubation time and mass loss.The mechanical strength was decreased after 17 days compared to that of the specimens bioincised<13 days.The bioincised specimens demonstrated the deeper penetration depth than the un-bioincised specimens.It was significant correlation(P<0.01)between penetration depth and incubation time.The average value of the penetration depth of the bioincised specimens was deeper than the control groups by 158.7%.By FTIR analysis,the biodegradation ability of C.versicolor to decay cellulose and hemicellulose was weaker than that of lignin.The bioincising treatment significantly increased the wood uptake of IPBC and CA,and reached the maximum uptake value at 17 and 13 days,respectively.Summarily,the bioincising pretreatment can obviously improve the wood decay resistance against C.versicolor and G.trabeum following by introducing the IPBC and CA. | Lulu Chang Binbin Rong Guoqi Xu Qingkai Meng Lihai Wang | 2020 | Journal of Forestry Research2020，31，5： | 0 |
| 3 | Characterization of natural fractures in deep-marine shales: a case study of the Wufeng and Longmaxi shale in the Luzhou Block Sichuan Basin, China显示文摘Natural fractures are of crucial importance for oil and gas reservoirs,especially for those with ultralow permeability and porosity.The deep-marine shale gas reservoirs of the Wufeng and Longmaxi Formations are typical targets for the study of natural fracture characteristics.Detailed descriptions of full-diameter shale drill core,together with 3D Computed Tomography scans and Formation MicroScanner Image data acquisition,were carried out to characterize microfracture morphology in order to obtain the key parameters of natural fractures in such system.The fracture type,orientation,and their macroscopic and microscopic distribution features are evaluated.The results show that the natural fracture density appears to remarkably decrease in the Wufeng and Longmaxi Formations with increasing the burial depth.Similar trends have been observed for fracture length and aperture.Moreover,the natural fracture density diminishes as the formation thickness increases.There are three main types of natural fractures,which we interpret as(I)mineral-filled fractures(by pyrite and calcite),i.e.,veins,(II)those induced by tectonic stress,and(III)those formed by other processes(including diagenetic shrinkage and fluid overpressure).Natural fracture orientations estimated from the studied natural fractures in the Luzhou block are not consistent with the present-day stress field.The difference in tortuosity between horizontally and vertically oriented fractures reveals their morphological complexity.In addition,natural fracture density,host rock formation thickness,average total organic carbon and effective porosity are found to be important factors for evaluating shale gas reservoirs.The study also reveals that the high density of natural fractures is decisive to evaluate the shale gas potential.The results may have significant implications for evaluating favorable exploration areas of shale gas reservoirs and can be applied to optimize hydraulic fracturing for permeability enhancement. | Shasha SUN Saipeng HUANG Enrique GOMEZ-RIVAS Albert GRIERA ΒοLIU Lulu XU Yaru WEN Dazhong DONG Zhensheng SHI Yan CHANG Yin XING | 2023 | Frontiers of Earth Science2023，17，1： | 0 |
| 4 | AcWRKY28 mediated activation of AcCPK genes confers salt tolerance in pineapple(Ananas comosus)显示文摘Unfavorable environmental cues severely affect crop productivity resulting in significant economic losses to farmers. In plants, multiple regulatory genes, such as the WRKY transcription factor (TF) family, modulate the expression of defense genes. However, the role of the pineapple WRKY genes is poorly understood. Here, we studied the pineapple WRKY gene, AcWRKY28, by generating AcWRKY28 over-expressing transgenic pineapple plants. Overexpression of AcWRKY28 enhanced the salt stress resistance in transgenic pineapple lines. Comparative transcriptome analysis of transgenic and wild-type pineapple plants showed that “plant-pathogen interaction” pathway genes, including 9calcium-dependent protein kinases (CPKs), were up-regulated in AcWRKY28 over-expressing plants. Furthermore, chromatin immunoprecipitation and yeast one-hybrid assays revealed AcCPK12, AcCPK3, AcCPK8, AcCPK1, and AcCPK15 as direct targets of AcWRKY28. Consistently, the study of AcCPK12 over-expressing Arabidopsis lines showed that AcCPK12 enhances salt, drought, and disease resistance. This study shows that AcWRKY28 plays a crucial role in promoting salt stress resistance by activating the expression of AcCPK genes. | Qiao Zhou Samaranayaka Vidana Gamage Nirosha Priyadarshani Rongjuan Qin Han Cheng Tiantian Luo Myat Hnin Wai Mohammad Aqa Mohammadi Yanhui Liu Chang Liu Hanyang Cai Xiaomei Wang Yeqiang Liu Yuan Qin Lulu Wang | 2024 | Horticultural Plant Journal2024，10，2： | 0 |
| 5 | Neural Network Accelerated Investigation of the Dynamic Structure-Performance Relations of Electrochemical CO_(2) Reduction over SnO_(x),Surfaces显示文摘Heterogeneous catalysts,especially metal oxides,play a curial role in improving energy conversion efficiency and production of valuable chemicals.However,the surface structure at the atomic level and the nature of active sites are still ambiguous due to the dynamism of surface structure and difficulty in structure characterization under electrochemical conditions. | Lulu Li Zhi-Jian Zhao Gong Zhang Dongfang Cheng Xin Chang Xintong Yuan Tuo Wang Jinlong Gong | 2023 | Research2023，，2： | 0 |
| 6 | High permittivity of Ba(Ti_(1-x)Zr_(x))O_(3)-based Y5V-type nanopowders and ceramics synthesized using a one-step sol-gel method显示文摘We synthesized Ba(Ti_(1-x)Zr_(x))O_(3)-based(BTZ)nanopowders modified with Cu and Nb,and sintered ceramics using a one-step sol-gel process.Characterization using TG-DTG,XRD,SEM,and TEM analysis methods revealed that the powders formed at a nanometer scale.The process was controlled by the composition and calcining temperature.BaZrO3 formed earlier than BaTiO3 during the calcining,then a Ba(Ti_(1-x)Zr_(x))O_(3) solid solution formed incompletely,resulting in ceramics with huge permittivity and good temperature stability.Moreover,the maximum dielectric constant(εmax)first increased and then decreased as the Curie temperature(Tc)shifted to a lower temperature.When the Zr concentration was 5.4 mol%,εmax was greater than 24,000 and the dielectric loss(25℃)was only 0.005;this meets the Electronic Industries Alliance Y5V specifications.These nanopowders would permit a significant reduction in the thickness of multilayer ceramic capacitors and the huge pemittivity of the ceramics will help meet the current demand for device miniaturization in the electronics industry. | Lulu Zhang Bin Cui Rong Ma Leilei Li Yan Wang Wenqing Yan Zhuguo Chang | 2013 | Journal of Advanced Dielectrics2013，3，4： | 0 |
| 7 | METTL14 is a chromatin regulator independent of its RNA N^(6)-methyladenosine methyltransferase activity显示文摘METTL3 and METTL14 are two components that form the core heterodimer of the main RNA m^(6)A methyltransferase complex(MTC)that installs m^(6)A.Surprisingly,depletion of METTL3 or METTL14 displayed distinct effects on stemness maintenance of mouse embryonic stem cell(mESC).While comparable global hypo-methylation in RNA m^(6)A was observed in Mettl3 or Mettl14 knockout mESCs,respectively.Mettl14 knockout led to a globally decreased nascent RNA synthesis,whereas Mettl3 depletion resulted in transcription upregulation,suggesting that METTL14 might possess an mA-independent role in gene regulation.We found that METTL14 colocalizes with the repressive H3K27me3 modification.Mechanistically,METTL14,but not METTL3,binds H3K27me3 and recruits KDM6B to induce H3K27me3 demethylation independent of METTL3.Depletion of METTL14 thus led to a global increase in H3K27me3 level along with a global gene suppression.The effects of METTL14 on regulation of H3K27me3 is essential for the transition from self-renewal to differentiation of mESCs.This work reveals a regulatory mechanism on heterochromatin by METTL14 in a manner distinct from METTL3 and independently of m^(6)A,and critically impacts transcriptional regulation,stemness maintenance,and differentiation ofmESCs. | Xiaoyang Dou Lulu Huang Yu Xiao Chang Liu Yini Li Xinning Zhang Lishan Yu Ran Zhao Lei Yang Chuan Chen Xianbin Yu Boyang Gao Meijie Qi Yawei Gao Bin Shen Shuying Sun Chuan He Jun Liu | 2023 | Protein & Cell2023，14，9： | 0 |
| 8 | Self-assembled multiepitope nanovaccine based on NoV P particles induces effective and lasting protection against H3N2 influenza virus显示文摘Current seasonal influenza vaccines confer only limited coverage of virus strains due to the frequent genetic and antigenic variability of influenza virus(IV).Epitope vaccines that accurately target conserved domains provide a promising approach to increase the breadth of protection;however,poor immunogenicity greatly hinders their application.The protruding(P)domain of the norovirus(NoV),which can self-assemble into a 24-mer particle called the NoV P particle,offers an ideal antigen presentation platform.In this study,a multiepitope nanovaccine displaying influenza epitopes(HMN-PP)was constructed based on the NoV P particle nanoplatform.Large amounts of HMN-PP were easily expressed in Escherichia coli in soluble form.Animal experiments showed that the adjuvanted HMN-PP nanovaccine induced epitope-specific antibodies and haemagglutinin(HA)-specific neutralizing antibodies,the antibodies could persist for at least three months after the last immunization.Furthermore,HMN-PP induced matrix protein 2 extracellular domain(M2e)-specific antibody-dependent cell-mediated cytotoxicity,CD4^(+)and CD8^(+)T-cell responses,a nucleoprotein(NP)-specific cytotoxic T lymphocyte(CTL)response.These results indicated that the combination of a multiepitope vaccine and self-assembled NoV P particles may be an ideal and effective vaccine strategy for highly variable viruses such as IV and SARS-CoV-2. | Jiaojiao Nie Qingyu Wang Shenghui Jin Xin Yao Lipeng Xu Yaotian Chang Fan Ding Zeyu Li Lulu Sun Yuhua Shi Yaming Shan | 2023 | Nano Research2023，16，5： | 0 |
| 9 | Tuning the hydrogen and hydroxyl adsorption on Ru nanoparticles for hydrogen electrode reactions via size controlling显示文摘Controlling the particle size of catalyst to understand the active sites is the key to design efficient electrocatalysts toward hydrogen electrode reactions including hydrogen oxidation and evolution(HOR/HER).Herein, the hydrogen and hydroxyl adsorption on Ru/C could be effectively tuned for HOR/HER by simple controlling the particle sizes. It is found that the metallic Ru(Ru0) is the active site for HOR/HER, while oxidized Ru(Rux+) will hinder the adsorption and desorption of hydrogen on the catalyst. For the HOR,catalyst with small particles is more efficient, due to it is a three-phase interface reaction of gas on the surface of the catalyst. For the HER, the metallic state of Ru is crucial. The deconvolution of hydrogen peaks indicates that the catalytic sites with low hydrogen binding energy(HBE) shoulder the majority of the HOR activity. CO stripping curve further demonstrates that the stronger hydroxyl species(OHad)affinity is beneficial to promote the HOR performance. The results indicate that the design of efficient HOR/HER catalyst should focus on the balance between particle size and metallic states. | Zhengrong Li Lulu An Min Song Tonghui Zhao Jingjing Zhang Chang Zhang Zhizhan Li Deli Wang | 2023 | Chinese Chemical Letters2023，34，4： | 0 |
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