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| 1 | Classification of the Gut Microbiota of Patients in Intensive Care Units During Development of Sepsis and Septic Shock显示文摘The gut microbiota of intensive care unit(ICU)patients displays extreme dysbiosis associated with increased susceptibility to organ failure,sepsis,and septic shock.However,such dysbiosis is difficult to characterize owing to the high dimensional complexity of the gut microbiota.We tested whether the concept of enterotype can be applied to the gut microbiota of ICU patients to describe the dysbiosis.We collected 131 fecal samples from 64 ICU patients diagnosed with sepsis or septic shock and performed 16S rRNA gene sequencing to dissect their gut microbiota compositions.During the development of sepsis or septic shock and during various medical treatments,the ICU patients always exhibited two dysbiotic microbiota patterns,or ICU-enterotypes,which could not be explained by host properties such as age,sex,and body mass index,or external stressors such as infection site and antibiotic use.ICU-enterotype I(ICU E1)comprised predominantly Bacteroides and an unclassified genus of Enterobacteriaceae,while ICU-enterotype II(ICU E2)comprised predominantly Enterococcus.Among more critically ill patients with Acute Physiology and Chronic Health Evaluation II(APACHE II)scores>18,septic shock was more likely to occur with ICU E1(P=0.041).Additionally,ICU E1 was correlated with high serum lactate levels(P=0.007).Therefore,different patterns of dysbiosis were correlated with different clinical outcomes,suggesting that ICU-enterotypes should be diagnosed as independent clinical indices.Thus,the microbial-based human index classifier we propose is precise and effective for timely monitoring of ICU-enterotypes of individual patients.This work is a first step toward precision medicine for septic patients based on their gut microbiota profiles. | Wanglin Liu Mingyue Cheng Jinman Li Peng Zhang Hang Fan Qinghe Hu Maozhen Han Longxiang Su Huaiwu He Yigang Tong Kang Ning Yun Long | 2020 | Genomics, Proteomics & Bioinformatics2020，18，6： | 7 |
| 2 | Effect of Sb-site nonstoichiometry on the structure and microwave dielectric properties of Li_(3)Mg_(2)Sb_(1-x)O_(6) ceramics显示文摘The non-stoichiometric Li_(3)Mg_(2)Sb_(1-x)O_(6)(0.05≤x≤0.125)compounds have been prepared via the mixed oxide method.The influences of Sb nonstoichiometry on the sintering behavior,microstructure,phase composition along with microwave dielectric performances for Li_(3)Mg_(2)Sb_(1-x)O_(6) ceramics were studied.Combined with X-ray diffraction(XRD)and Raman spectra,it was confirmed that phase composition could not be affected by the Sb nonstoichiometry and almost pure phase Li_(3)Mg_(2)SbO_(6) was formed in all compositions.Appropriate Sb-deficiency in Li_(3)Mg_(2)SbO_(6) not only lowered its sintering temperature but also remarkably improved its Q×f value.In particular,non-stoichiometric Li_(3)Mg_(2)Sb_(0.9)O_(6) ceramics sintered at 1250℃/5 h owned seldom low dielectric constant ε_(r)=10.8,near-zero resonant frequency temperature coefficient τ_(f)=-8.0 ppm/℃,and high quality factor Q×f=86,300 GHz(at 10.4 GHz).This study provides an alternative approach to ameliorate its dielectric performances for Li_(3)Mg_(2)SbO_(6)-based compounds through defect-engineering. | Cuijin PEI Jingjing TAN Yang LI Guoguang YAO Yanmin JIA Zhaoyu REN Peng LIU Huaiwu ZHANG | 2020 | Journal of Advanced Ceramics2020，9，5： | 6 |
| 3 | Low-temperature sintering and microwave dielectric properties of CaMg1−xLi2xSi2O6(x=0−0.3)ceramics显示文摘In this study, low-temperature fired CaMg1−xLi2xSi2O6 microwave dielectric ceramics were prepared via the traditional solid-state reaction method. In this process, 0.4 wt% Li2CO3-B2O3-SiO2-CaCO3-Al2O3 (LBSCA) glass was added as a sintering aid. The results showed that ceramics consisted of CaMgSi2O6 as the main phase. The second phases were CaSiO3 always existing and Li2SiO3 occurring at substitution content x > 0.05. Li+ substitution effectively lowered sintering temperature due to 0.4 wt% LBSCA and contributed to grain densification, and the most homogeneous morphology could be observed at x = 0.05. The effects of relative density, the second phase, and ionic polarizability on dielectric constant (εr) were investigated. The quality factor (Q × f) varied with packing fraction that concerned the second phase. Moreover, the temperature coefficient of the resonant frequency (τf) was influenced by MgO6 octahedral distortion and bond valence. Excellent dielectric properties of the CaMg1−xLi2xSi2O6 ceramic was exhibited at x = 0.05 with εr = 7.44, Q × f = 41,017 GHz (f = 15.1638 GHz), and τf = −59.3 ppm/°C when sintered at 900 °C. It had a good application prospect in the field of low-temperature co-fired ceramic (LTCC) substrate and devices. | Fangyi Huang Hua Su Yuanxun Li Huaiwu Zhang Xiaoli Tang | 2020 | Journal of Advanced Ceramics2020，9，4： | 6 |
| 4 | Influences of Sputtering Angles and Annealing Temperatures on the Magnetic and Magnetostrictive Performances of TbFe Films显示文摘To increase the low-field magnetostriction of TbFe films, the influences of sputtering angles and annealing temperatures on its magnetic and magnetostrictive performances were systematically investigated. With the change in detection of magnetic domains by MFM (magnetic force microscopy) indicates that the easy magnetization direction shifts gradually from perpendicular to parallel to the film plane with decreasing sputtering angles. Annealing can enhance the magnetization and magnetostriction of the TbFe films. However, at too high annealing temperature,both the magnetization and magnetostriction of the TbFe films were suppressed to some extent. | Hongchuan JIANG, Wanli ZHANG, Wenxu ZHANG, Shiqing YANG and Huaiwu ZHANG College of Microelectronics and Solid State Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China | 2005 | Journal of Materials Science & Technology2005，21，3： | 4 |
| 5 | Design and application of active sites in g-C_(3)N_(4)-based photocatalysts显示文摘With the development in photocatalysis field,photocatalysts have received increasing attention due to their important role in environmental pollution and energy crisis.As a nonmetallic photocatalyst,graphitic carbon nitride(g-C3N4)has been widely recognized because of its excellent optical properties,low cost,and environment friendliness.In the g-C3N4 intrinsic frameworks,carbon atom tends to be the reducing active site,while nitrogen atom tends to be the oxidizing active site and reducing active site according to the difference of electronegativity.However,the quantity and quality of these active sites are affected by many factors,including C N covalent bonds,surface properties,etc.Active sites play an important role in photocatalysis;however,this role is not detailed in most reports.In this review,we proposed the following possible mechanisms of active sites in improving the photocatalytic activity of traditional g-C_(3)N_(4) based on its intrinsic:morphology regulation,carrier migration,surface active treatment,and substrate adsorption.The following factors affecting the active sites of g-C_(3)N_(4),including basal engineering and hybrid engineering,were also investigated.The roles of these active sites in improving the photocatalytic activity of g-C_(3)N_(4)-based photocatalytic materials,including morphology regulation,surface treatment,heteroatom doping,and interfacial interaction,were also expounded.Current challenges and future development of g-C_(3)N_(4)-based photocatalysts that are rich in active surface sites were also discussed.This review provides an in-depth understanding of g-C_(3)N_(4)-based photocatalysts. | Yang Li Xin Li Huaiwu Zhang Jiajie Fan Quanjun Xiang | 2020 | Journal of Materials Science & Technology2020，56，21： | 4 |
| 6 | Nucleation field,reversal mechanism and coercivity paradox in two-phased magnetic nanosystem显示文摘The magnetic reversal mechanism has been determined within a micromagnetic model reliably for a two-phased magnetic nanosystem,with the formulae for nucleation fields derived analytically.It is found that the nucleation field HN decreases uniformly as the size of the soft phase Ls increases whereas it increases with the size of the hard phase Lh.The analysis shows that whilst the effect of Lh could be ignored in most cases,where the nucleation field is dominated by the Ls and the calculation could be significantly simplified,the overly simple inverse square law between HN and the soft layer thickness Ls adopted by the previous researchers is not a good approximation.While nucleation is the beginning of the magnetic reversal,pinning is the dominant coercivity mechanism in both two-phased and single-phased magnetic materials,where the crystalline defects exist.Comparison with the experimental data confirms this conclusion,indicating that Brown's paradox results from the much lower effective anisotropy in both single-phased and composite materials,as speculated in the literature. | ZHAO GuoPing ZHANG HuaiWu ZHONG ZhiYong CHEN Lang | 2011 | Science China(Physics,Mechanics & Astronomy)2011，54，7： | 3 |
| 7 | Study of magnetic and magneto-optical properties of heavily doped bismuth substitute yttrium iron garnet (Bi∶YIG) film显示文摘The magnetic and magneto-optical properties of heavily doped Bi∶YIG film were studied. The film was deposited by radio frequency magnetron sputtering method and crystallized by rapid recurrent thermal annealing (RRTA). The results show that the RRTA treated film has good properties both in microwave and optical wave band. The saturation magnetization of the film on different substrates varies from 135.7 to 138.6 kA·m-1. The coercive field of the film on GGG substrate is about 0.32 kA·m-1, while about 0.8-1.43 kA·m-1 on YAG substrate and 1.75 kA·m-1 on Al2O3 substrate. The Faraday angle is about 3-5 (°)·μm-1 when optical wavelength ranges at 450-600 nm. The transmission spectra of the Bi∶YIG films on three substrates has similar change as annealing temperature below 800 ℃. Specially, when annealing temperature is above 800 ℃ a step is observed between 550 and 650 nm wavelength for the film deposited on Al2O3 substrate.Three results are very useful in magneto-optical recording application and integrated microwave devices. | YANG Qinghui ZHANG Huaiwu LIU Yingli | 2006 | Rare Metals2006，25，z1： | 2 |
| 8 | Molecular-beam epitaxy-grown HgCdTe infrared detector:Material physics, structure design, and device fabrication显示文摘Infrared(IR) detectors have important applications in numerous civil and military sectors. Hg Cd Te is one of the most important materials for IR detector manufacture. This review systematically discusses the progress of Hg Cd Te materials grown via molecular-beam epitaxy(MBE) for IR detection in terms of material physics, structure design, and fabrication. The material physics of Hg Cd Te includes crystal information, band structure, and electrical and optical properties. The characterization methods of the As-grown Hg Cd Te materials are also summarized. Then, four design structures of Hg Cd Te for IR detectors, with multilayer, superlattice, double-layer heterojunction, and barrier properties, which significantly improve the device performance,are discussed. The third section summarizes the studies on Hg Cd Te MBE-grown on different substrates, including Cd Zn Te, Si,and Ga Sb, in recent decades. This review discusses the factors influencing the growth of the Hg Cd Te film and their relationships and optimal conditions. Finally, we present the prospects and challenges associated with the fabrication and applications of Hg Cd Te materials for IR detectors. | Xiaohui Wang Mengbo Wang Yulong Liao Huaiwu Zhang Baohui Zhang Tianlong Wen Jiabao Yi Liang Qiao | 2023 | Science China(Physics,Mechanics & Astronomy)2023，66，3： | 1 |
| 9 | A tunable hybrid metamaterial absorber based on vanadium oxide films显示文摘 | Wen Qiye Zhang Huaiwu Yang Qinghui | 2012 | J Phys D: Appl Phys2012，45，23： | 1 |
| 10 | Enhanced performance of a fast GaAs-based terahertz modulator via surface passivation显示文摘Surface-modified semiconductors show enormous potential for opto-terahertz(THz)spatial modulation due to their enhanced modulation depth(MD)along with their inherent broad bandwidth.Taking full advantage of the surface modification,a performance-enhanced,all-optical,fast switchable THz modulator was achieved here based on the surface-passivated Ga As wafer.With a decreased surface recombination rate and prolonged carrier lifetime induced by passivation,S-passivated Ga As was demonstrated as a viable candidate to enhance THz modulation performance in MD,especially at low photodoping levels.Despite a degraded modulation rate owing to the longer carrier lifetime,this passivated Ga As modulator simultaneously realizes a fast modulation at a 69-MHz speed and as high an MD as ~94% in a spectral wideband of 0.2-1.2 THz.The results demonstrated a new strategy to alleviate the tradeoff between high MD and speed in contrast to bare surfaces or heterogeneous films/unusual geometry on semiconductors including Si,Ge,and GaAs. | YULIAN HE YUANSHENG WANG QINGHUI YANG HUAIWU ZHANG QIYE WEN | 2021 | Photonics Research2021，9，11： | 1 |
| 11 | Terahertz metamaterials with VO2 cut-wires for thermal tunability显示文摘 | Wen Qiye Zhang Huaiwu Yang Qinghui | 2010 | Appl Phys Lett2010，97，21： | 1 |
| 12 | Dual band terahertz metamaterial absorber:design,fabrication,and characterization显示文摘 | Wen Qiye Zhang Huaiwu Xie Yunsong | | 0，，： | 1 |
| 13 | Influence of Mi- crostructure on the DC-Bias-Superposition Characteristics of NiZn Ferrites显示文摘 | Xiaoli Tang Huaiwu Zhang Hua Su | 2011 | IEEE Trans Magn2011，47，10： | 1 |
| 14 | The strong non-reciprocity of metamaterial absorber: characteristic, interpretation and modeling 显示文摘 | Yuanxun Li Yingli Liu Huaiwu Zhang | 2009 | Journal of Physics D : Applied Physics2009，，42： | 1 |
| 15 | Progress in high and new-technology soft magnetic material and components for in formation technology and white goods industries显示文摘 | ZHANG Huaiwu SHI Yu JIA Lijun | 2002 | World Product Technol(in Chinese)2002，，6： | 1 |
| 16 | Influence of microstruture on the DC-bias-superposition characteristic of NiZn ferrites显示文摘 | TANG Xiaoli ZHANG Huaiwu SU Hua | 2011 | IEEE Transactions on Magneteic2011，47，10： | 1 |
| 17 | Effect of CaO B2OFSiO2 glass on the magnetic and dielectric properties of NiCuZn ferrites显示文摘 | Wang Yunyan Zhang Huaiwu Li Lin | 2012 | Joumal of Magnetism and Magnetic Materials2012，324，4： | 1 |
| 18 | Novel Series of Low-Firing Microwave Dielectric Ceramics:Ca5A4(VO4)6(A2+=Mg,Zn)显示文摘 | Yao Guoguan Liu Peng Zhang Huaiwu | 2013 | Journal of American Ceramic Society2013，96，6： | 1 |
| 19 | Molecular bases for resistance to acetyl-coenzyme A carboxylase inhibitor in Japa nese foxtail (Alopecurus japonicus) 显示文摘 | Tang Huaiwu Li Jun Dong Liyao | 2012 | Pest Management Science2012，68，9： | 1 |
| 20 | High-permeability and high-curie temperature NiCuZn ferrite显示文摘 | SU Hua ZHANG Huaiwu TANG Xiaoli | 2004 | Journal of Magnetism and Magnetic Materials2004，283，23： | 1 |
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