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1Progress and perspectives in dielectric energy storage ceramics显示文摘Dielectric ceramic capacitors,with the advantages of high power density,fast chargedischarge capability,excellent fatigue endurance,and good high temperature stability,have been acknowledged to be promising candidates for solid-state pulse power systems.This review investigates the energy storage performances of linear dielectric,relaxor ferroelectric,and antiferroelectric from the viewpoint of chemical modification,macro/microstructural design,and electrical property optimization.Research progress of ceramic bulks and films for Pb-based and/or Pb-free systems is summarized.Finally,we propose the perspectives on the development of energy storage ceramics for pulse power capacitors in the future.Dongxu LI Xiaojun ZENG Zhipeng LI Zong-Yang SHEN Hua HAO Wenqin LUO Xingcai WANG Fusheng SONG Zhumei WANG Yueming LI 2021Journal of Advanced Ceramics2021,10,4:16
2Effects of resolvin D1 on inflammatory responses and oxidative stress of lipopolysaccharide-induced acute lung injury in mice显示文摘Yuan Ruixia Wang Lei Yao Chengyue Wu Qingping Marie Christelle Xie Wanli Zhang Xingcai Sun Wei Wang Huiqing Yao Shanglong 2014Chinese Medical Journal2014,,5:10
3Glass modified barium strontium titanate ceramics for energy storage capacitor at elevated temperatures显示文摘A glass with composition of B_(2)O_(3)-Bi_(2)O_(3)-SiO_(2)-CaO-BaO-Al_(2)O_(3)-ZrO_(2)(BBSZ)modified Ba_(x)Sr_(1-x)TiO_(3)(BST,x=0.3 and 0.4)ceramics were prepared by a conventional solid state reaction method abided by a formula of BST+y%BBSZ(y=0,2,4,7,and 10,in mass).The effect of BBSZ glass content on the structure,dielectric properties and energy storage characteristics of the ceramics was investigated.The dielectric constant reduced but the endurable electrical strength enhanced due to the BBSZ glass addition in BST ceramics.In particular,the dielectric loss of the ceramics at elevated temperature(e.g.200℃)can be strongly suppressed from tanδ>20%to tanδ<3% after BBSZ glass modification.For Ba_(0.3)Sr_(0.7)TiO_(3)+2%BBSZ ceramics,an optimized energy storage density(γ=0.63 J/cm^(3))and efficiency(η=91.6%)under an applied electric field of 160 kV/cm was obtained at room temperature.Meanwhile,the temperature dependent polarization-electric field(P-E)hysteresis loops were measured to evaluate the energy storage characteristics of the ceramics potential for high voltage capacitor application at elevated temperatures.Zong-Yang Shen Yu Wang Yanxue Tang Yuanying Yu Wen-Qin Luo Xingcai Wang Yueming Li Zhumei Wang Fusheng Song 2019Journal of Materiomics2019,5,4:9
4P-E hysteresis loop going slim in Ba0.3Sr0.7TiO3-modified Bi0.5Na0.5TiO3 ceramics for energy storage applications显示文摘(Ba0.3Sr0.7)x(Bi0.5Na0.5)1-xTiO3(BSxBNT,x=0.3–V0.8)ceramics were prepared to investigate their structure,dielectric and ferroelectric properties.BSxBNT ceramics possess pure perovskite structure accompanied from a tetragonal symmetry to pseudo-cubic one with the increase of x value,being confirmed by X-ray diffraction(XRD)and Raman results.The Tm corresponding to a temperature in the vicinity of maximum dielectric constant gradually decreases from 110℃(x=0.3)to-45℃(x=0.8),across Tm=36℃(x=0.5)with a maximum dielectric constant(ɛr=5920@1 kHz)around room temperature.The saturated polarization Ps gradually while the remnant polarization Pr sharply decreases with the increase of x value,making the P-E hysteresis loop of BSxBNT ceramics goes slim.A maximum difference between Ps and Pr(Ps-Pr)is obtained for BSxBNT ceramics with x=0.5,at which a high recoverable energy density(Wrec=1.04 J/cm3)is achieved under an applied electric field of 100 kV/cm with an efficiency ofη=77%.Meanwhile,the varied temperature P-E loops,fatigue measurements,and electric breakdown characteristics for the sample with x=0.5 indicate that it is promising for pulsed power energy storage capacitor candidate materials.Dongxu LI Zong-Yang SHEN Zhipeng LI Wenqin LUO Xingcai WANG Zhumei WANG Fusheng SONG Yueming LI 2020Journal of Advanced Ceramics2020,9,2:8
5A Preliminary Study on the Use of NCEP Temperature Images and Additive Tectonic Stress from Astro-Tidal-Triggering to Forecast Short-Impending Earthquakes显示文摘Taking the three earthquakes which occurred in Tibet, China during the period of July 12 to August 25, 2004 as an example,the paper analyses the M_S≥6.0 earthquakes that occurred in China and M_S≥7.0 earthquakes that occurred overseas since May of 2003 by combining the image data from the National Center for Environmental Prediction of America(NCEP)with the additive tectonic stress from astro-tidal-triggering (ATSA) and makes the following conclusions: The abnormal temperature image data of NCEP can better reflect the spatial-temporal evolution process of tectonic earthquake activity; The ATSA has an evident triggering effect on the activity of a fault when the terra stress is in critical status; using the NCEP images and the ATSA to forecast short-impending earthquake is a new concept; The three earthquakes occurred during the same phase of the respective ATSA cycle, i.e. that occurred at the time when the ATSA reached the relatively steady end of a peak, rather than at the time when the variation rate was maximal. In addition, the author discovered that the occurrence time of other earthquake cases during 2003~2004 in Tibet was also in the same phase of the above-mentioned cycles, and therefore, further study of this feature is needed with more earthquake cases in other areas over longer periods of time.Ma Weiyu Zhang Xingcai Dai Xiaofang Xie Fang 2007Earthquake Research in China2007,21,1:8
6Experimental study of n-heptane ignition delay with carbon dioxide addition in a rapid compression machine under low-temperature conditions显示文摘The ignition delay of n-heptane homogeneous charge compression ignition(HCCI) combustion under high levels of carbon dioxide addition was quantitatively measured at elevated pressure from low to intermediate temperatures in a rapid compression machine.The experiments were conducted in the compressed temperature range 613-750 K.Both the compression ratio and fuel/air equivalence ratio were varied to investigate their effects on the ignition delay of n-heptane.Carbon dioxide was subsequently added to study the influence of the carbon dioxide level on the ignition delay of n-heptane under low-temperature conditions.It was found that carbon dioxide had different effects on the two-stages of ignition delay of n-heptane under low-temperature conditions:the concentration of carbon dioxide had little effect on the first-stage ignition time;a certain concentration of carbon dioxide accelerated the first-stage ignition but had a significantly larger impact on the second-stage ignition delay,thus increasing the overall ignition delay time.The results also showed that the first-stage ignition delay of n-heptane is only a function of temperature under low-temperature conditions.The mass of n-heptane in the combustible mixture,the equivalence ratio,and the pressure at the top dead center had little effect on the first-stage ignition time of n-heptane.GUANG HuanYu YANG Zheng HUANG Zhen LU XingCai 2012Chinese Science Bulletin2012,57,30:5
7Phylogeny of fireflies (Coleoptera: Lampyridae) inferred from mitochondrial 16S ribosomal DNA, with references to morphological and ethological traits显示文摘我们从中国的西南定序 18 萤火虫种类的部分 mitochondrial 16S ribosomal DNA (16S rDNA ) 。以前与相应序列结合了包括日本、朝鲜、中国的种类的报导的、种系发生的树被加入邻居的、最大的吝啬和贝叶斯的方法重建。所有重建同意树的大多数节点。因为, Monophyly 没 Lampyridae 被支持 Rhagophthalmus 哦在 Rhagophthalmidae 的黄雾在它以内被包括。Lamprigera,在 Lampyrinae unreliably 放的一个类,显示出一种靠近的关系到 Amydetinae。因为 Pristolycus sagulatus (Lampyrinae ) 在它以内被包括, Monophyly 没 Luciolinae 被支持。在 Luciolinae,分别地, monophyly, Cutos 和 Hotaria,井被建立但是词法、分子的数据继续显示 Luciola 不是单音的门并且它的分是确实必要的。在 Lampyrinae' 以内, Pyrocoelia 和 Diaphanes 不是单音的门,但是 monophyly, Pyrocoelia + , Diaphanes 很好被支持。Diaphanes 的发展史第一次被讨论。分享 Pyrocoelia 和 Diaphanes 的一些人物的最新发现的种(Diaphanes pectinealis 李 et 梁) 的通用放置质问这二个类似的类的定界线。与交配系统的萤火虫的引用,我们建议更多的力量应该被放在象 antennal 结构那样的那些性选择的字符上在 Lampyridae 的分类。LI Xueyan YANG Shuang XIE Meng LIANG Xingcai 2006Progress in Natural Science:Materials International2006,16,8:5
8An NIR photothermal-responsive hybrid hydrogel for enhanced wound healing显示文摘Moderately regulating vascularization and immune microenvironment of wound site is necessary to achieve scarless wound healing of the skin.Herein,we have prepared an angiogenesis-promoting and scar-preventing band-aid with a core-shell structure,that consists of MXene-loaded nanofibers(MNFs)as the core and dopamine-hyaluronic acid hydrogel(H)as the shell(MNFs@V-H@DA)to encapsulate a growth factor(vascular endothelial growth factor,VEGF,abbreviated as V)and H2S donor(diallyl trisulfide,DATS,abbreviated as DA).The continuous release of DA from this system produced H2S,which would successfully induce macrophages to polarize into M2-lile phenotype,regulating the immune microenvironment and inhibiting an excessive inflammatory response at the wound sites.It is conducive to the proliferation of skin cells,facilitating the wound healing.In addition,an appropriate amount of VEGF can be released from the MXene nanofibrous skeleton by adjusting the time of near-infrared(NIR)light exposure,preventing excessive neovascularization and extracellular matrix deposition at the wound sites.Collectively,this NIR photothermal-responsive band-aid achieved scarless wound healing through gradient-controlled vascularization and a related immune sequential reaction of damaged skin tissue.Lin Jin Xiaoqing Guo Di Gao Yan Liu Jiahua Ni Zhiming Zhang Yiqiao Huang Guibin Xu Zhe Yang Xingcai Zhang Xianhan Jiang 2022Bioactive Materials2022,7,10:4
9Growth of covellite crystal onto azurite surface during sulfurization and its response to flotation behavior显示文摘In this work,the growth of copper sulfide crystal onto azurite surfaces during sulfurization and its response to flotation are investigated.Filed emission scanning electron microscopy-energy dispersive X-ray spectroscopy(FESEM) and X-ray diffraction(XRD) studies confirmed that the sulfurization of azurite is not limited to the mineral surface,but rather penetrates into the bulk to form covellite crystal(synCuS),creating favorable conditions for the stable adsorption of xanthate and greatly promoting the azurite flotation.Additionally,as demonstrated by X-ray photoelectron spectroscopy(XPS) and time of flight secondary ion mass spectrometry(TOF-SIMS) analyses,a redox reaction occurred during this process,and Cu(Ⅱ) onto the mineral surface was reduced to Cu(Ⅰ).Correspondingly,reduced S^(2-) was oxidized to(S_(2))^(2-),(S_n)^(-2),and even to deeper oxidation state S~0,(S_(x)O_(y))^(n-) and SO_(4)^(2-).Excess sodium sulfide strengthens copper sulfide to form onto the azurite surface,and provides enough raw material for crystal copper sulfide to grow,resulting in the formation of 'flake-like' covellite with a better crystallinity.However,the floatability of azurite decreased dramatically under this condition,because the generated massive colloidal copper sulfide in flotation pulp deteriorates the flotation environment,resulting in a decreased effective adsorption of collector onto azurite surfaces.Jinpeng Cai Peilun Shen Dianwen Liu Xiaolin Zhang Jianjun Fang Chao Su Xingcai Yu Jiangli Li Han Wang 2021International Journal of Mining Science and Technology2021,31,6:4
10Ca^(2+)-supplying black phosphorus-based scaffolds fabricated with microfluidic technology for osteogenesis显示文摘Effective osteogenesis remains a challenge in the treatment of bone defects.The emergence of artificial bone scaffolds provides an attractive solution.In this work,a new biomineralization strategy is proposed to facilitate osteogenesis through sustaining supply of nutrients including phosphorus(P),calcium(Ca),and silicon(Si).We developed black phosphorus(BP)-based,three-dimensional nanocomposite fibrous scaffolds via microfluidic technology to provide a wealth of essential ions for bone defect treatment.The fibrous scaffolds were fabricated from 3D poly(L-lactic acid)(PLLA)nanofibers(3D NFs),BP nanosheets,and hydroxyapatite(HA)-porous SiO2 nanoparticles.The 3D BP@HA NFs possess three advantages:i)stably connected pores allow the easy entrance of bone marrow-derived mesenchymal stem cells(BMSCs)into the interior of the 3D fibrous scaffolds for bone repair and osteogenesis;ii)plentiful nutrients in the NFs strongly improve osteogenic differentiation in the bone repair area;iii)the photothermal effect of fibrous scaffolds promotes the release of elements necessary for bone formation,thus achieving accelerated osteogenesis.Both in vitro and in vivo results demonstrated that the 3D BP@HA NFs,with the assistance of NIR laser,exhibited good performance in promoting bone regeneration.Furthermore,microfluidic technology makes it possible to obtain high-quality 3D BP@HA NFs with low costs,rapid processing,high throughput and mass production,greatly improving the prospects for clinical application.This is also the first BP-based bone scaffold platform that can self-supply Ca^(2+),which may be the blessedness for older patients with bone defects or patients with damaged bones as a result of calcium loss.Zhanrong Li Xingcai Zhang Jiang Ouyang Dandan Chu Fengqi Han Liuqi Shi Ruixing Liu Zhihua Guo Grace X.Gu Wei Tao Lin Jin Jingguo Li 2021Bioactive Materials2021,6,11:4
11Fuel design real-time to control HCCI combustion显示文摘In order to achieve lower emissions and extensive load in the homogeneous charge com- pression ignition (HCCI) engine system, a novel fuel design concept that high-octane number fuel and high-cetane number fuel are mixed real-time to con- trol HCCI combustion is proposed in this study. HCCI combustion fueled with iso-octane/n-heptane mix- tures controlled real-time on a single-cylinder HCCI combustion engine is studied. The test results show that the equivalence ratio of n-heptane in mixtures decides ignition and controls the combustion phase of HCCI combustion. The addition of iso-octane ex- tends knocking limit in equivalence ratio somewhat, but knocking occurrence mainly depends on the total concentration of mixture. Although operating range in equivalence ratio becomes narrow with the increas- ing proportion of iso-octane, the maximum load of HCCI combustion fueled with iso-octane/n-heptane mixtures controlled real-time is increased about 80% more than that of pure n-heptane. When iso-octane/ n-heptane mixtures are controlled in optimized method, it is proved that the load of HCCI combustion can be fully extended and emissions can be de- creased remarkably, while at the same time the higher indicated thermal efficiencies are obtained over the extensive operation range.HOU Yuchun HUANG Zhen LU Xingcai FANG Junhuan ZU Linlin 2006Chinese Science Bulletin2006,51,21:3
12One-Step Preparation of Green Fabric for Continuous Antibacterial Applications显示文摘Polypropylene(PP)scaffolds are the most commonly used biomedical scaffolds despite their disadvan-tages,which include problems with adhesion,infection,and inflammatory responses.Here,we report on the successful development of a facile one-step method to fabricate a series of novel triclosan poly-dopamine polypropylene(TPP)composite scaffolds and thereby effectively improve the biocompatibility and long-term antibacterial properties of PP scaffolds.The antibacterial triclosan can effectively interact with dopamine during biocompatible polydopamine formation on the PP scaffold by one-step green fab-rication.Thanks to the sustained release of triclosan from the biocompatible polydopamine coating,a 5mm×5mm sample of TPP-coated scaffold made with a triclosan concentration of 8 mg-mL^(-1)(referredto herein as TPP-8)exhibited a continuous antibacterial effect against both Escherichia coli(E.coli)and Staphylococcus aureus(S.aureus)for more than 15d,at maximum antibacterial volumes of 2 and 5mL,respectively.Our study establishes a new direction for facile long-term antibacterial studies for medical applications.Rongkang Huang Minghui Hu Weiwen Liang Juanjuan Zheng Yang Du Yanhuan Lin Huaiming Wang Wentai Guo Zhantao Zeng Chuangkun Li Ming Li Hui Wang Xingcai Zhang 2021Engineering2021,7,3:3
13Remarkably enhanced dielectric stability and energy storage properties in BNT–BST relaxor ceramics by A-site defect engineering for pulsed power applications显示文摘Lead-free bulk ceramics for advanced pulsed power capacitors show relatively low recoverable energy storage density(Wrec)especially at low electric field condition.To address this challenge,we propose an A-site defect engineering to optimize the electric polarization behavior by disrupting the orderly arrangement of A-site ions,in which Ba_(0.105)Na_(0.325)Sr_(0.245−1.5x)□_(0.5x)Bi_(0.325)+xTiO_(3)(BNS_(0.245−1.5x)□_(0.5x)B_(0.325+x)T,x=0,0.02,0.04,0.06,and 0.08)lead-free ceramics are selected as the representative.The BNS_(0.245−1.5x)□_(0.5x)B_(0.325+x)T ceramics are prepared by using pressureless solid-state sintering and achieve large W_(rec)(1.8 J/cm^(3))at a low electric field(@110 kV/cm)when x=0.06.The value of 1.8 J/cm3 is super high as compared to all other W_(rec) in lead-free bulk ceramics under a relatively low electric field(<160 kV/cm).Furthermore,a high dielectric constant of 2930 within 15%fluctuation in a wide temperature range of 40–350℃is also obtained in BNS_(0.245−1.5x)□_(0.5x)B_(0.325+x)T(x=0.06)ceramics.The excellent performances can be attributed to the A-site defect engineering,which can reduce remnant polarization(P_(r))and improve the thermal evolution of polar nanoregions(PNRs).This work confirms that the BNS_(0.245−1.5x)□_(0.5x)B_(0.325+x)T(x=0.06)ceramics are desirable for advanced pulsed power capacitors,and will push the development of a series of Bi0.5Na0.5TiO3(BNT)-based ceramics with high W_(rec) and high-temperature stability.Zhipeng LI Dong-Xu LI Zong-Yang SHEN Xiaojun ZENG Fusheng SONG Wenqin LUO Xingcai WANG Zhumei WANG Yueming LI 2022Journal of Advanced Ceramics2022,11,2:3
14Pre-chamber turbulent jet ignition of methane/air mixtures with multiple orifices in a large bore constant volume chamber: effect of air-fuel equivalence ratio and pre-mixed pressure显示文摘Liquefied natural gas (LNG), mainly composed of methane, is in progress to substitute diesel fuel in heavyduty marine engine for practical, economic, and environmental considerations. However, natural gas is relatively difficult to be ignited in a large bore combustion chamber. A combustion enhancement technique called prechamber turbulent jet ignition (TJI) can permit combustion and flame propagation in a largebore volume. To investigate the effect of air-fuel equivalence ratio and pre-mixed pressure on pre-chamber TJI of methane/air mixtures with multiple orifices in a large bore volume, experimental tests and computational simulations were implemented to study the discharge of hot turbulent jets from six orifices of the pre-chamber. Different initial pressures and air-fuel equivalence ratios were considered to analyze the characteristics of TJI. The asymmetry of the turbulent jet actuated from six different orifices were found due to the asymmetric orientation of the spark plug, resulting in the inhomogeneous distribution of combustion in the constant volume chamber, which should be considered seriously in the marine engine design. Besides,as the premixed pressure increases, it has more effect on the flame propagation and plays a more important role, as it further increases.Xiang LI Wenzheng ZHANG Zhong HUANG Dehao JU Li HUANG Mingzhi FENG Xingcai LU Zhen HUANG 2019Frontiers in Energy2019,13,3:3
15An experimental and modeling study of n-hexadecane autoignition under low-to-intermediate temperatures显示文摘N-hexadecane is a potential candidate of diesel surrogate fuels and is also the largest linear alkane(n-alkanes)with known chemical kinetic models.The objective of this study is to investigate the autoignition characteristics of n-hexadecane in the lowto-intermediate temperature region and to validate the existing kinetic models.In this study,the ignition delay times(IDTs)of nhexadecane were measured using a heated rapid compression machine(RCM)at two pressures of 7 and 10 bar,and over equivalence ratios ranging from 0.5 to 1.3.Two-stage ignition characteristic and the negative temperature coefficient(NTC)behavior of total ignition delay time were experimentally captured.This study paid special attention to the influence of pressure,equivalence ratio,and oxygen content on the IDTs of n-hexadecane.It is observed that both the total IDTs and the first-stage IDTs decrease with the rise of those parameters.It is worth noting that the first-stage IDT is found to show a greater dependence on temperature but a weaker dependence on other parameters compared to the total IDT.The observed IDT dependence in the lowtemperature region(LTR)were quantitatively described by ignition delay time correlations.The newly measured IDTs were then validated against two kinetic models(LLNL and CRECK).Simulation results show that both models underpredict the first-stage IDT but generally capture the temperature dependence.The CRECK model well predicts the total IDTs of n-hexadecane while the LLNL model significantly underpredicts the total IDTs at most investigated conditions.To the best of our knowledge,this study is the first investigation on n-hexadecane autoignition under low-to-intermediate temperatures,which deepens the understanding of large n-alkane oxidation and contributes to the improvement of the existing kinetic models.YU Liang WANG WenYu WANG SiXu FENG Yuan QIAN Yong LU XingCai 2020Science China(Technological Sciences)2020,63,5:2
16Detecting sand-dust storms using a wind-profiling radar显示文摘Sand-dust storm is a type of disastrous weather, typically occurring in arid and semi-arid climates. This study selected a region in the hinterlands of the Taklimakan Desert, called the Tazhong region, as the experimental area to quantitatively estimate the particle concentrations of sand-dust storms using the boundary layer wind-profiling radar. We thoroughly studied the radar echo signals and reflectivity factor features during the sand-dust storms. The results indicate that(1) under sand-dust storm conditions, boundary layer wind-profiling radar cannot capture the complete information regarding horizontal wind velocity and direction, but it can obtain the backscattering intensity of sand-dust storms; and(2) during sand-dust storms particle size distributions in the surface layer closely resemble log-normal distributions, with sand-dust particles sizes of 90–100 μm accounting for the maximum particle probability. Retrieved particle size distributions at heights of 600, 800, and 1000 m follow log-normal distributions, and the expected value of particle diameter decreases gradually with increasing height. From the perspective of orders of magnitude, the retrieved results for particle number concentrations and mass concentrations are consistent with previous aircraft-detected results, indicating that it is basically feasible to use boundary layer wind-profiling radar to quantitatively detect the particle concentrations of dust storms.WANG Minzhong MING Hu HUO Wen XU Hongxiong LI Jiangang LI Xingcai 2017Journal of Arid Land2017,9,5:2
17Auto-ignition of biomass synthesis gas in shock tube at elevated temperature and pressure显示文摘Ignition delay times of multi-component biomass synthesis gas(bio-syngas) diluted in argon were measured in a shock tube at elevated pressure(5, 10 and 15 bar, 1 bar = 105Pa), wide temperature ranges(1,100–1,700 K) and various equivalence ratios(0.5, 1.0, 2.0). Additionally, the effects of the variations of main constituents(H2:CO = 0.125–8) on ignition delays were investigated. The experimental results indicated that the ignition delay decreases as the pressure increases above certain temperature(around 1,200 K) and vice versa. The ignition delays were also found to rise as CO concentration increases, which is in good agreement with the literature. In addition, the ignition delays of bio-syngas were found increasing as the equivalence ratio rises. This behavior was primarily discussed in present work. Experimental results were also compared with numerical predictions of multiple chemical kinetic mechanisms and Li's mechanism was found having the best accuracy. The logarithmic ignition delays were found nonlinearly decrease with the H2 concentration under various conditions, and the effects of temperature,equivalence ratio and H2 concentration on the ignition delays are all remarkable. However, the effect of pressure is relatively smaller under current conditions. Sensitivity analysis and reaction pathway analysis of methane showed that R1(H ? O2= O ? OH) is the most sensitive reaction promoting ignition and R13(H ? O2(?M) = HO2(?M)), R53(CH3? H(?M) = CH4(?M)), R54(CH4? H =CH3? H2) as well as R56(CH4? OH = CH3? H2O) are key reactions prohibiting ignition under current experimental conditions. Among them, R53(CH3? H(?M) = CH4(?M)), R54(CH4? H = CH3? H2) have the largest positive sensitivities and the high contribution rate in rich mixture.The rate of production(ROP) of OH of R1 showed that OH ROP of R1 decreases sharply as the mixture turns rich.Therefore, the ignition delays become longer as the equivalence ratio increases.Linqi Ouyang Hua Li Shuzhou Sun Xiaole Wang Xingcai Lu 2015Science Bulletin2015,60,22:2
18A facile and general method for synthesis of antibiotic-free protein-based hydrogel:Wound dressing for the eradication of drug-resistant bacteria and biofilms显示文摘Antibacterial protein hydrogels are receiving increasing attention in the aspect of bacteria-infected-wound healing. However, bacterial drug resistance and biofilm infections lead to hard healing of wounds, thus the construction of biological agents that can overcome these issues is essential. Here, a simple and universal method to construct antibiotic-free protein hydrogel with excellent biocompatibility and superior antibacterial activity against drug-resistant bacteria and biofilms was developed. The green industrial microbicide tetrakis (hydroxymethyl) phosphonium sulfate (THPS) as cross-linking agent can be quickly cross-linked with model protein bovine serum albumin (BSA) to form antibacterial hydrogel through simple mixing without any other initiators, subsequently promoting drug-resistance bacteria-infected wound healing. This simple gelatinization strategy allows at least ten different proteins to form hydrogels (e.g. BSA, human serum albumin (HSA), egg albumin, chymotrypsin, trypsin, lysozyme, transferrin, myohemoglobin, hemoglobin, and phycocyanin) under the same conditions, showing prominent universality. Furthermore, drug-resistance bacteria and biofilm could be efficiently destroyed by the representative BSA hydrogel (B-Hydrogel) with antibacterial activity, overcoming biofilm-induced bacterial resistance. The in vivo study demonstrated that the B-Hydrogel as wound dressing can promote reepithelization to accelerate the healing of methicillin-resistant staphylococcus aureus (MRSA)-infected skin wounds without inducing significant side-effect. This readily accessible antibiotic-free protein-based hydrogel not only opens an avenue to provide a facile, feasible and general gelation strategy, but also exhibits promising application in hospital and community MRSA disinfection and treatment.Jiang Ouyang Qingyue Bu Na Tao Mingkai Chen Haijun Liu Jun Zhou Jinggong Liu Bo Deng Na Kong Xingcai Zhang Tianfeng Chen Yihai Cao Wei Tao 2022Bioactive Materials2022,7,12:2
19Research Progress of Bactrocera(Zeugodacus) scutellata(Hendel)(Diptera: Tephritidae)显示文摘The stripped fruit fly,Bactrocera( Zeugodacus) scutellata( Hendel),is one of the most dangerous quarantine insect pests in China. Due to its wide distribution and heavy damage,it has caused serious economic losses in fruit and vegetable production in China. This paper assembles research progresses in morphological characteristics,classification status,host ranges,geographical distribution,population dynamics,molecular ecology and biology of B. scutellata,and put forward the following research prospects as well.Jin Yan Liu Xiaofei He Xingcai Ye Hui 2015Plant Diseases and Pests2015,6,3:2
20Projected Changes in Extreme High Temperature and Heat Stress in China显示文摘High temperature accompanied with high humidity may result in unbearable and oppressive weather. In this study,future changes of extreme high temperature and heat stress in China's Mainland are examined based on daily maximum temperature(T_x) and daily maximum wet-bulb globe temperature(T_w). T_w has integrated the effects of both temperature and humidity. Future climate projections are derived from the bias-corrected climate data of five general circulation models under the Representative Concentration Pathways(RCPs) 2.6 and 8.5 scenarios. Changes of hot days and heat waves in July and August in the future(particularly for 2020-50 and 2070-99), relative to the baseline period(1981-2010), are estimated and analyzed. The results show that the future T_x and T_w of entire China will increase by 1.5-5℃ on average around 2085 under different RCPs. Future increases in T_x and T_w exhibit high spatial heterogeneity, ranging from 1.2 to 6℃ across different regions and RCPs. By around 2085, the mean duration of heat waves will increase by 5 days per annum under RCP8.5. According to T_x, heat waves will mostly occur in Northwest and Southeast China, whereas based on T_w estimates, heat waves will mostly occur over Southeast China and the mean heat wave duration will be much longer than those from T_x. The total extreme hot days(T_x or T_w > 35℃) will increase by 10-30 days. Southeast China will experience the severest heat stress in the near future as extreme high temperature and heat waves will occur more often in this region, which is particularly true when heat waves are assessed based on T_w. In comparison to those purely temperature-based indices, the index T_w provides a new perspective for heat stress assessment in China.Xingcai LIU Qiuhong TANG Xuejun ZHANG Siao SUN 2018Journal of Meteorological Research2018,32,3:2
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