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1Progress in Brucella vaccine development显示文摘Brucella spp。是 zoonotic,容许的细胞内部的病原体,它原因动物和人的疾病。在胎儿的流产的动物疾病结果;在人,它与起伏的发烧表明像流感的症状,与象感染的普通复杂并发症的骨关节炎。为人的普鲁斯病病人的抗菌素政体可以持续几个月并且不总是是完全有效的。当为人没有疫苗时,几支准许的实时 Brucella 疫苗为在家畜的使用是可得到的。这些动物疫苗的表演依赖于免疫的宿主种,剂量,和线路。最新设计了实时疫苗,缺乏明确的毒力因素,保留低剩余毒力,是高度保护的,并且可以某天代替当前使用的动物疫苗。这些也有可能的人的应用。而且由于他们在动物模型的提高的安全和功效,为普鲁斯病的子单元疫苗在家畜和人为他们的申请显示出大诺言。这评论总结普鲁斯病疫苗开发的进步并且给出候选人疫苗的概述。Xinghong YAN Jerod A. SKYBERG Ling CAO Beata CLAPP Theresa THORNBURG David W. PASCUAL 2013Frontiers in Biology2013,8,1:27
2An emission source inversion model based on satellite data and its application in air quality forecasts显示文摘This paper aims at constructing an emission source inversion model using a variational processing method and adaptive nudging scheme for the Community Multiscale Air Quality Model (CMAQ) based on satellite data to investigate the applicability of high resolution OMI (Ozone Monitoring Instrument) column concentration data for air quality forecasts over the North China. The results show a reasonable consistency and good correlation between the spatial distributions of NO2 from surface and OMI satellite measurements in both winter and summer. Such OMI products may be used to implement integrated variational analysis based on observation data on the ground. With linear and variational corrections made, the spatial distribution of OMI NO2 clearly revealed more localized distributing characteristics of NO2 concentration. With such information, emission sources in the southwest and southeast of North China are found to have greater impacts on air quality in Beijing. When the retrieved emission source inventory based on high-resolution OMI NO2 data was used, the coupled Weather Research Forecasting CMAQ model (WRF-CMAQ) performed significantly better in forecasting NO2 concentration level and its tendency as reflected by the more consistencies between the NO2 concentrations from surface observation and model result. In conclusion, satellite data are particularly important for simulating NO2 concentrations on urban and street-block scale. High-resolution OMI NO2 data are applicable for inversing NOx emission source inventory, assessing the regional pollution status and pollution control strategy, and improving the model forecasting results on urban scale.CHENG XingHong XU XiangDe DING GuoAn 2010Science China Earth Sciences2010,53,5:17
3Recovery of Titanium from the Rich Titanium Slag by H2SO4 Method显示文摘The blast furnace slag bearing TiO2 in Panzhihua, China, is an important resource to be utilized. In the present paper, the effects of the ratio of slag to H2SO4, the reaction temperature, the particle size of the slag, and the concentration of H2SO4 on the reaction rate and the acidolysis ratio of Ti were studied. The results indicated that the maximum acidolysis ratio reached 98%, which can serve as an experimental basis for the production of titania from the slag.Zhenqi HUANG, Minghua WANG, Xinghong DU and Zhitong SUISchool of Materials and Metallurgy, Northeastern University, Shenyang 110006, China 2003Journal of Materials Science & Technology2003,19,2:10
4Advances in ultra-high temperature ceramics,composites,and coatings显示文摘Ultra-high temperature ceramics(UHTCs)are generally referred to the carbides,nitrides,and borides of the transition metals,with the Group IVB compounds(Zr&Hf)and TaC as the main focus.The UHTCs are endowed with ultra-high melting points,excellent mechanical properties,and ablation resistance at elevated temperatures.These unique combinations of properties make them promising materials for extremely environmental structural applications in rocket and hypersonic vehicles,particularly nozzles,leading edges,and engine components,etc.In addition to bulk UHTCs,UHTC coatings and fiber reinforced UHTC composites are extensively developed and applied to avoid the intrinsic brittleness and poor thermal shock resistance of bulk ceramics.Recently,high-entropy UHTCs are developed rapidly and attract a lot of attention as an emerging direction for ultra-high temperature materials.This review presents the state of the art of processing approaches,microstructure design and properties of UHTCs from bulk materials to composites and coatings,as well as the future directions.Dewei NI Yuan CHENG Jiaping ZHANG Ji-Xuan LIU Ji ZOU Bowen CHEN Haoyang WU Hejun LI Shaoming DONG Jiecai HAN Xinghong ZHANG Qiangang FU Guo-Jun ZHANG 2022Journal of Advanced Ceramics2022,11,1:9
5Optimization of Protein Extraction and Decoloration Conditions for Tea Residues显示文摘To optimize alkaline method for extracting proteins from tea residue(TR), the effect of extraction conditions on tea protein extraction rate(TPER) was investigated. Single factor experiment showed the extraction temperature 80 °C, extraction time 100 min, p H value 13 and liquid–solid ratio 40:1 as the optimal extraction conditions. The orthogonal test revealed that the maximum TPER reached 29.71% under the following optimal combination of conditions: extraction temperature 70 °C, extraction time 60 min, p H 12 and liquid–solid ratio 50:1. For optimizing the purification of tea residue proteins, isoelectric point precipitation(p I), ammonium sulfate precipitation(a S) and isoelectric point plus ammonium sulfate precipitation(i PAS) were compared. The result showed that the highest protein precipitation rate(PPR) was 89.70% which was generated by using i PAS. Furthermore, powdered activated carbon was chosen as the most suitable decolorant for the extracted proteins.CUI Qiaoyun NI Xinghong ZENG Liang TU Zheng LI Jin SUN Kang CHEN Xuan LI Xinghui 2017Horticultural Plant Journal2017,3,4:8
6The Electric Field Detector (EFD) onboard the ZH-1 satellite and firstobservational results显示文摘Previous studies have reported that, before or after occurrences of strong earthquakes, some low earth orbit satellites recorded ionospheric disturbances, including electromagnetic emissions and plasma fluctuations over the epicenter region or its conjugate point.Theoretically speaking, due to some electromagnetic coupling effect, electromagnetic emissions from the earthquake preparation zone could propagate from the lithosphere to the atmosphere, and could reach the ionosphere, even up to the inner magnetosphere. This paper introduces the electric field detector(EFD) onboard the ZhangHeng-1 satellite(ZH-1). The EFD is designed to measure electric field fluctuations within the broad frequency range of DC to 3.5 MHz, divided into 4 channels: ULF(DC–16 Hz), ELF(6 Hz–2.2 kHz), VLF(1.8 kHz–20 kHz) and HF(18 kHz–3.5 MHz). The sampling rates of the channels are 125 Hz, 5 kHz, 50 kHz and 10 MHz, respectively. The EFD includes4 spherical probes mounted on a over 4.5 m boom and an electronic box inside the satellite module. The resolution of the EFD is 1μV·m-1·Hz-1/2 at frequencies from DC to 16 Hz, and the sensitivity is 0.1 μV·m-1·Hz-1/2 at frequencies from 6 Hz to 2.2 kHz, 0.05 μV·m-1·Hz-1/2 in the band 1.8 kHz to 20 kHz, and 0.1μV·m-1·Hz-1/2 from 20 kHz to 3.5 MHz. The dynamic range from DC to 20 kHz is over 120 dB, and over96 dB from 20 kHz to 3.5 MHz. The EFD has two observation modes: survey mode and burst mode. The survey mode concentrates primarily on electric field power density values; the burst mode provides high sampling rate waveform data. The detailed configuration of the EFD onboard the ZH-1 is also introduced in this paper. During the six months' orbit test phase, the EFD recorded a number of natural electromagnetic emissions. Preliminary analysis of these data suggests that the EFD performs well onboard the ZH-1 and is meeting the requirements of the scientific objectives of ZH-1.JianPing Huang JunGang Lei ShiXun Li ZhiMa Zeren Cheng Li XingHong Zhu WeiHao Yu 2018Earth and Planetary Physics2018,2,6:8
7Mechanisms of Solidification Structure Improvement of Ultra Pure 17 wt% Cr Ferritic Stainless Steel by Ti,Nb Addition显示文摘The grain structures and the precipitates in the solidification microstructure of the ultra pure 17 wt% Cr ferritic stainless steels with different Ti and/or Nb micro-alloying were investigated both experimentally and theoretically.It was found by the grain structure observation that the addition of Ti or Nb to the steel reduced the grain size (D) and elongation factor (E),and improved the equiaxed grain proportion (P) and globularity factor (ξ).Among the four steels studied,the minimum grain size and maximum equiaxed grain proportion were obtained by jointly adding both Ti and Nb to the steel.The SEM observation indicated that several kinds of precipitations,such as TiN,MC (rich in Nb),Laves phase (Fe2Nb) and so on,formed in the corresponding steels.In addition,the results calculated using the Thermo-Calc software illustrated that TiN precipitates in the liquid at proper Ti and N contents.Meanwhile,the solidification interval (△T) was enlarged by the addition of Ti or Nb,and the effectiveness of Nb was stronger than Ti.Based on the experimental and calculation results,the mechanisms of grain refinement and increment in equiaxed grain proportion were discussed.Yating Shan Xinghong Luo Xiaoqiang Hu Shi Liu 2011Journal of Materials Science & Technology2011,27,4:7
8Neonatal Maternal Deprivation Followed by Adult Stress Enhances Adrenergic Signaling to Advance Visceral Hypersensitivity显示文摘The pathophysiology of visceral pain in patients with irritable bowel syndrome remains largely unknown.Our previous study showed that neonatal maternal deprivation(NMD) does not induce visceral hypersensitivity at the age of 6 weeks in rats. The aim of this study was to determine whether NMD followed by adult stress at the age of 6 weeks induces visceral pain in rats and to investigate the roles of adrenergic signaling in visceral pain. Here we showed that NMD rats exhibited visceral hypersensitivity 6 h and 24 h after the termination of adult multiple stressors(AMSs). The plasma level of norepinephrine was significantly increased in NMD rats after AMSs. Whole-cell patch-clamp recording showed that the excitability of dorsal root ganglion(DRG) neurons from NMD rats with AMSs was remarkably increased. The expression of β_2 adrenergic receptors at the protein and mRNA levels was markedly higher in NMD rats with AMSs than in rats with NMD alone. Inhibition of β_2 adrenergic receptors with propranolol or butoxamine enhanced the colorectal distention threshold and application of butoxamine also reversed the enhanced hypersensitivity of DRG neurons. Overall,our data demonstrate that AMS induces visceral hypersensitivity in NMD rats, in part due to enhanced NE-β_2 adrenergic signaling in DRGs.Wan-Jie Du Shufen Hu Xin Li Ping-An Zhang Xinghong Jiang Shan-Ping Yu Guang-Yin Xu 2019Neuroscience Bulletin2019,35,1:5
9Temperature-controlled ionic liquid dispersive liquid phase microextraction combined with ultra-high-pressure liquid chromatography for the rapid determination of triclosan,triclocarban and methyl-triclosan in aqueous samples显示文摘As extraction solvents,ionic liquids have green characteristics.In this study,an environmentally benign analytical method termed temperature-controlled ionic liquid dispersive liquid phase microextraction (TIL-DLME) combined with ultra-highpressure liquid chromatography (UHPLC)-tunable ultraviolet detection (TUV) was developed for the pre-concentration and determination of triclosan (TCS),triclocarban (TCC) and methyl-triclosan (M-TCS) in water samples.Significant parameters that may affect extraction efficiencies were examined and optimized,including the types and amount of ionic liquids,volume of the diluent,heating temperature,cooling time,salt effect and pH value.Under the optimum conditions,linearity of the method was observed in the ranges of 0.0100-100 μgL-1 for TCS and M-TCS,and 0.00500-50.0 μgL-1 for TCC with correlation coefficients (r2) > 0.9903.The limits of detection (LODs) ranged from 1.15 to 5.33 ngL-1.TCS in domestic water and TCC in reclaimed water were detected at the concentrations of 1.01 and 0.126 μgL-1,respectively.The spiked recoveries of the three target compounds in reclaimed water,irrigating water,waste water and domestic water samples were obtained in the ranges of 68.4%-71.9%,61.6%-87.8%,58.9%-74.9% and 64.9%-92.4%,respectively.Compared with the previous dispersive liquid-liquid microextraction method (DLLME) about the determination of TCS,TCC and M-TCS,this method is not only more environmentally friendly but also more sensitive.GUO JieHong 1,2,LI XingHong 2,CAO XueLi 1,QU Lei 2,3,HOU DeKun 2 & XU XiaoBai 2 1 School of Chemical and Environmental Engineering,Beijing Technology and Business University,Beijing 100048,China 2 State Key Laboratory of Environmental Chemistry and Eco-toxicology Research Center of Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China 3 Zhengzhou University,Zhengzhou 450001,China 2010Science China Chemistry2010,53,12:5
10Isolation and characterization of a heat-resistant strain with high yield of Pyropia yezoensis Ueda(Bangiales,Rhodophyta)显示文摘A heat-resistant Pyropia yezoensis strain YZ-4 was isolated from the regenerated blades of single somatic cells of the wild-type(WT)blades treated with 60Co-g-irradiation.When cultured at 23C and 24C,the survival and division rates of the YZ-4 conchospores were significantly higher than those of WT(P<0.01).After 16 days in culture the survival rates of YZ-4 conchospores were 71.2%and 60.8%at 23C and 24C,respectively,and the division rates of the surviving conchospores were 100%in both cases.Under the same culture conditions,the survival rates of WT conchospores were only 16.9%and 11.5%,and the division rate 99.8%and 81.8%respectively.The resistance of 50-day-aged F1 gametophytic blades of YZ-4 to the temperature rebound was also significantly higher than those of WT(P<0.01).After 30 days in culture at 18C,23C and 24C,the mean blade length increased by 8.5,4.3 and 2.3 times in YZ-4 and was only 3,0.6 and 0.4 times in WT,respectively.The mean blade weight increased 191.9,85.4 and 66.2 times in YZ-4,but only 78.2,7.8 and 4.6 times in WT.On the 15th day WT blades began to decay,but no decay was observed in YZ-4 blades even after 45 days in culture at 23C and 24C.The results obtained indicate that YZ-4 has a higher resistance to higher temperature insults than WT and it might be of value for commercial production of P.yezoensis.Hongchang Ding Binglei Zhang Xinghong Yan 2016Aquaculture and Fisheries2016,1,1:5
11Accumulation of polybrominated diphenyl ethers in breast milk of women from an e-waste recycling center in China显示文摘Polybrominated diphenyl ethers(PBDEs) can be transferred to infants through the ingestion of breast milk, resulting in potential health risk. In this study, PBDEs, hydroxylated polybrominated diphenyl ethers(OH-PBDEs) and 2,2′,4,4′,5,6′-hexachlorobiphenyl(CB-153)in human milk from women living adjacent to e-waste recycling sites of Wenling,China, were investigated. The median level of PBDEs in samples from residents living in the e-waste recycling environment > 20 years(R_20group, 19.5 ng/g lipid weight(lw))was significantly higher than that for residents living in Wenling < 3 years(R_3group,3.88 ng/g lw)(p < 0.05), likely ascribable to specific exposure to PBDEs from e-waste recycling activities. In the R_20 group, most congeners(except for BDE-209) were correlated with each other(p < 0.05). Moreover, CB-153 showed significant association with most PBDE congeners, rather than BDE-209. The relationship indicated that most BDE congeners other than BDE-209 shared common sources and/or pathways with CB-153, e.g., dietary ingestion. The correlations between BDE-209 and other congeners were different in the two groups, likely suggesting their different exposure sources and/or pathways for PBDEs.Although estimated dietary intake of PBDEs for infants via breast milk was lower than the minimum value affecting human health, the PBDE exposure of infants should be of great concern because of their potential effect on the development of neonates over long-term exposure. OH-PBDEs were not detected in the collected samples, which is in accordance with reports in published literature, likely indicating that they were not apt to be accumulated in human milk.Xinghong Li Yuan Tian Yun Zhang Yujie Ben Quanxia Lv 2017Journal of Environmental Sciences2017,29,2:5
12Self-propagating High-temperature Synthesis, Microstructure and Mechanical Properties of TiC-TiB_2-Cu Composites显示文摘TiC-TiB_2-Cu composites 被与假热均衡说的紧迫的使用的 Ti, B_4C 和 Cu 粉末相结合的自我繁殖的 high-temperaturesynthesis 生产。Themicrostructure 和 composites 的机械性质被调查。X 光检查衍射(XRD ) 和最后的产品仅仅是 TiC, TiB_2 和 Cu,这分阶段执行的结果显示出的扫描电子显微镜学(SEM ) 。打的 TiB_2 谷物和球状或不规则的 TiC 谷物在综合产品的微观结构被发现。TiB_2 和 TiCparticles 的反应温度和谷物尺寸与增加 Cu 内容减少了。进 composites 的 Cu 的介绍导致了相对密度和弯曲力量的激烈的增加,并且最大的价值与 20 wt % 的增加被获得,当当 Cu 内容是 40 wt % 时,破裂坚韧是最好时。Chuncheng ZHU Xinghong ZHANG Xiaodong HE Qiang XU 2006Journal of Materials Science & Technology2006,22,1:5
13Phyllosticta species associated with citrus diseases in China显示文摘Phyllosticta species associated with diseases of four commercial Citrus species grown in China are reported.Totally,496 Phyllosticta strains were isolated from mandarins(Citrus reticulata),pomeloes(C.maxima),oranges(C.sinensis)and lemons(C.limon)in the main citrus producing regions across China,and 74 strains were selected for phylogenetic analysis.Analyses inferred from the sequences of internal transcribed spacer region(ITS1,5.8S nrDNA and ITS2),partial translation elongation factor 1-alpha(TEF1)and partial actin gene(ACT),showed these representative Phyllosticta isolates clustered in four distinct clades corresponding to three known,and one undescribed species.The newly resolved taxon,Phyllosticta citrichinaensis was isolated from leaves and fruits of all four Citrus species and is introduced in this paper.This taxon caused minor damage,showing irregular spots or freckles.Phyllosticta citriasiana,associated with tan spot of pomeloes,was isolated only from pomeloes,and never from lemons,mandarins and oranges.Phyllosticta citricarpa,the citrus black spot pathogen,which is presently subjected to phytosanitary legislation in the EU and United States,was isolated from lemons,mandarins and oranges,but never from pomeloes.The isolates of P.citricarpa clustered in two subclades,one from mandarins,the other from oranges and lemons.P.capitalensis was isolated from all four Citrus species as an endophyte,causing false melanose,or together with P.citricarpa or P.citriasiana.Morphological,cultural and biochemical characters were consistent with the results of phylogenetic analysis.In addition,a specific primer pair Pca8/ITS4 was designed and selected,and its corresponding PCR procedure was developed for the detection of P.citriasiana in this study.Xinghong Wang Guoqing Chen Feng Huang Jingze Zhang Kevin D.Hyde Hongye Li 2012Fungal Diversity2012,,1:5
14PCL2 regulates p53 stability and functions as a tumor suppressor in breast cancer显示文摘Polycomblike2(PCL2) is a well-known component of polycomb repressive complex 2(PRC2) and plays important roles in H3 K27 methylation and homeotic gene silencing.However,the involvement of PCL2 in breast cancer development remains unclear.Here,we established PCL2 as a tumor suppressor gene in breast cancer.Expression level of PCL2 was significantly downregulated in breast cancer tissue samples observed at different TNM stages.Ectopic expression of PCL2 could significantly inhibit cell proliferation and promoted apoptosis.PCL2 also remarkably elevated levels of p53 and its targets by increasing p53 stability.Mechanistically,PCL2 protected p53 proteins from MDM2-mediated ubiquitination and degradation by sequestering MDM2 into the nucleolus.Overexpression of PCL2 also suppressed migration and invasion by inhibiting epithelial-mesenchymal transition.PCL2 expression was correlated with Ecadherin expression and was inversely correlated with vimentin expression.Furthermore,PCL2 knockdown could attenuate anti-tumor effect of MLN4924.Taken together,our findings indicated that PCL2 played a tumor suppressor role in development and progression of breast cancer and may be a prognostic and predictive marker for breast cancer.Yiran Liang Yang Yang Renbo Guo Shuang Gao Xinghong Guo Danyang Li Meng Wang Haruhiko Koseki Xiangzhi Li 2018Science Bulletin2018,63,10:4
15Design and immunogenicity assessment of HIV-1 virus-like particles as a candidate vaccine显示文摘The rapid growth of the global HIV/AIDS epidemic makes it a high priority to develop an effective vaccine.Since a live attenuated or inactivated HIV vaccine is not likely to be approved for clinical application due to safety concerns,HIV virus like particles(VLPs) offer an attractive alternative because they are considered safer since they lack viral genome.We got a stable eukaryotic cell line by G418 resistance selection,engineered to express the HIV-1 structure protein Gag and Env efficiently and stably.We confirmed the presence of Gag and Env proteins in the cell culture supernatant and that they could self-assemble into VLPs.These VLPs were found to be able to elicit specific humoral and cellular immune response after immunization without any adjuvant.ZHANG XiZhen WANG XiaoDan ZHAO DongHai MENG XiangYu ZHAO XingHong YU XiangHui KONG Wei 2011Science China(Life Sciences)2011,54,11:4
16Decreased miR-325-5p Contributes to Visceral Hypersensitivity Through Post-transcriptional Upregulation of CCL2 in Rat Dorsal Root Ganglia显示文摘Chronic visceral hypersensitivity is an important type of chronic pain with unknown etiology and pathophysiology. Recent studies have shown that epigenetic regulation plays an important role in the development of chronic pain conditions. However, the role of mi RNA-325-5 p in chronic visceral pain remains unknown. The present study was designed to determine the roles and mechanism of mi RNA-325-5 p in a rat model of chronic visceral pain.This model was induced by neonatal colonic inflammation(NCI). In adulthood, NCI led to a significant reduction in the expression of mi RNA-325-5 p in colon-related dorsal root ganglia(DRGs), starting to decrease at the age of4 weeks and being maintained to 8 weeks. Intrathecal administration of mi RNA-325-5 p agomir significantly enhanced the colorectal distention(CRD) threshold in a time-dependent manner. NCI also markedly increased the expression of CCL2(C-C motif chemokine ligand 2) in colon-related DRGs at the m RNA and protein levels relative to age-matched control rats. The expression of CXCL12, IL33, SFRS7, and LGI1 was not significantlyaltered in NCI rats. CCL2 was co-expressed in Neu Npositive DRG neurons but not in glutamine synthetasepositive glial cells. Furthermore, CCL2 was mainly expressed in isolectin B4-binding-and calcitonin generelated peptide-positive DRG neurons but in few NF-200-positive cells. More importantly, CCL2 was expressed in mi R-325-5 p-positive DRG neurons. Intrathecal injection of mi RNA-325-5 p agomir remarkably reduced the upregulation of CCL2 in NCI rats. Administration of Bindarit, an inhibitor of CCL2, markedly raised the CRD threshold in NCI rats in a dose-and time-dependent manner. These data suggest that NCI suppresses mi RNA-325-5 p expression and enhances CCL2 expression, thus contributing to visceral hypersensitivity in adult rats.Rui Wu Ping-An Zhang Xuelian Liu Yuan Zhou Meijie Xu Xinghong Jiang Jun Yan Guang-Yin Xu 2019Neuroscience Bulletin2019,35,5:4
17Complex sources of air-soil-water pollution processes in the Miyun reservoir region显示文摘The comprehensive impact of atmospheric dry deposition and wet deposition and the pollution sources of farmlands, mining areas, and towns along the Baihe River on the water quality of Miyun reservoir is investigated from the angle of the complex sources of air-soil-water pollution processes, in the context of the 1990-2001 precipitation chemical data at Shangdianzi station--a WMO regional background air pollution monitoring station 15 km far from the Miyun reservoir, in conjunction with the atmospheric dry deposition and wet deposition data of the 2002-2003 Beijing City Air Pollution Observation Field Experiment (BECAPEX). Analysis results suggest that the major ions in precipitation in the Miyun reservoir region in this period were SO, NO, NH and Ca2+; wet acid deposition quantity of Miyun reservoir in the summer half year (April to September) was greater than the quantity in the winter half year (October to March), and the annual wet acid deposition in the reservoir exhibited a rising trend with the mean 1038.45 t, the maximum 1766.31 t occurred in 1996, and the minimum 604.02 t in 1994; the long-term averaged pH of atmospheric precipitation in the Miyun reservoir region was 5.20, i.e. weakly acidic, and the interannual variation of pH values displayed a falling trend. pH values of water body at various depths in the Miyun reservoir were all greater than 7.0, but they exhibited vertical and horizontal nonhomogeneity, and at the same region pH decreased vertically with depth; the 2002 and 2003 annual dustfalls in the Miyun reservoir were 13513.08 t and 3577.64 t, respectively, and the spring dustfall was the number one in a year, accounting for the 61.91% and 44.56% of the annual totals of 2002 and 2003, respectively. Because the atmospheric dry deposition and wet depositions contain multiple types heavy metal elements and harmful elements, they to some extent exacerbated the eutrophication, acidification and potential heavy metal pollution of the reservoir water. The above comprehensive analysis results reveal the complex source characters of the air-soil-water pollution process and the multi-sphere interaction effect. Besides, summer (rainy season) is a season when local soil pollutants enter the water system of reservoir after being washed out by torrential rain or heavy precipitation, which starts the air-soil- water chaining pollution processes, and results in the water pollution of rivers and reservoirs. It is found from the statistical analysis in this paper that the water pollution of Miyun reservoir was correlated with the rain wash-out and confluent flow in the peripheral and upstream local region of the reservoir, and the pollutant concentration of the reservoir water was significantly correlated with the upstream local region precipitation. Those correlation characters reveal the effect of the air-soil-water multi-spheric interaction of reservoir water pollution process. This paper presents the point of view of the complex source analysis of reservoir water pollution and a technical approach for tracing the spatial distribution of the upstream pollution source of the water systems of reservoir.YANG Dongzhen, XU Xiangde, LIU Xiaoduan, XU Qing, DING Guoan, CHENG Xinghong, CHEN Huailiang, ZHOU Huaigang, WANG Zhenfa, WANG Wenyan Key Laboratory of Atmospheric Chemistry, Center for Atmosphere Watch and Services, Chinese Academy of Meteorological Sciences, CMA, Beijing 100081, China Key Laboratory of Meteorological Disasters, CAMS, Beijing 100081, China National Center for Geological Testing, Beijing 100037, China Meteorological Bureau of Henan Province, Zhenzhou 450000, China Shangdianzi Background Atmospheric Pollution Observation Station, Miyun County, Beijing 101507, China 2005Science China Earth Sciences2005,48,z2:4
18Materials Experiment on Tiangong-2 Space Laboratory显示文摘During the China's Tiangong-2(TG-2) flight mission, the experiments of 18 kinds of material samples were conducted in space by using a Multiple Materials Processing Furnace(MMPF) mounted in the orbital module of the TG-2 space laboratory. After the experiments of 12 kinds of samples of the first and second batches were completed successfully, astronauts packed and brought them back to the ground by ShenzhouII spacecraft. By studying processing and formation on semiconductor and optoelectronics materials, metal alloys and metastable materials, functional single-crystal, micro-and nano-composite materials encapsulated in sample ampoules both in space and on Earth, we expect to explore some physical and chemical processes and mechanism of the materials formation that are normally obscured and therefore are difficult to study quantitatively on the ground due to the gravity-induced convection, to obtain the processing and synthesis technology for preparing high quality materials, and lead to the improvement and development of materials processing techniques on Earth, and also develop the experiment device and comprehensive ability for materials experiment in microgravity environment. This report briefly introduces the main points of each research work and preliminary comparative analysis results of 12 samples carried out by scientists undertaking research task.LI Xiangyang LU Ye MENG Xiangjian WANG Jianlu WANG Reng CHEN Lidong HUA Zile LI Xiaoya SHI Jianlin LIU Jinfeng XU Guisheng WEI Bingbo XIE Wenjun YIN Zhigang ZHANG Xingwang JIANG Hongxiang LI Hong LUO Xinghong ZHANG Haifeng ZHAO Jiuzhou WANG Binbin PAN Mingxiang 2018空间科学学报2018,38,5:4
19Investigation of microgravity effect on solidification of medium-low-melting-point alloy by drop tube experiment显示文摘The solidification microstructure of Al-Ni, Al-Cu, Ag-Cu, Al-Pb and Cu-Co alloys quenched in silicone oil before and after free fall in evacuated 50 m drop tube were investigated contrastively. The effect of microgravity on the solidification process of medium-low-melting-point eutectic, monotectic and peritectic alloys were ana-lyzed and discussed. The results indicated that the effects of microgravity on the eutectic cell shape, the pattern in eutectic cell and the inter-eutectic spacing were different for different types of eutectic systems; the size distribution of Pb particles in Al-5wt% Pb monotectic alloy was significantly changed by microgravity; and the shape of retained primary α-Co phase in Cu-10wt%Co peritectic alloy was also changed by microgravity. These results are beneficial for people to further identify and analyze the solidification behavior of multiphase alloys under microgravity.LUO XingHong CHEN Liang 2008Science China(Technological Sciences)2008,51,9:3
20One stop shop:backbones trees for important phytopathogenic genera:Ⅰ(2014)显示文摘Many fungi are pathogenic on plants and cause significant damage in agriculture and forestry.They are also part of the natural ecosystem and may play a role in regulating plant numbers/density.Morphological identification and analysis of plant pathogenic fungi,while important,is often hampered by the scarcity of discriminatory taxonomic characters and the endophytic or inconspicuous nature of these fungi.Molecular(DNA sequence)data for plant pathogenic fungi have emerged as key information for diagnostic and classification studies,although hampered in part by non-standard laboratory practices and analytical methods.To facilitate current and future research,this study provides phylogenetic synopses for 25 groups of plant pathogenic fungi in the Ascomycota,Basidiomycota,Mucormycotina(Fungi),and Oomycota,using recent molecular data,up-to-date names,and the latest taxonomic insights.Lineagespecific laboratory protocols together with advice on their application,as well as general observations,are also provided.We hope to maintain updated backbone trees of these fungal lineages over time and to publish them jointly as new data emerge.Researchers of plant pathogenic fungi not covered by the present study are invited to join this future effort.Bipolaris,Botryosphaeriaceae,Botryosphaeria,Botrytis,Choanephora,Colletotrichum,Curvularia,Diaporthe,Diplodia,Dothiorella,Fusarium,Gilbertella,Lasiodiplodia,Mucor,Neofusicoccum,Pestalotiopsis,Phyllosticta,Phytophthora,Puccinia,Pyrenophora,Pythium,Rhizopus,Stagonosporopsis,Ustilago and Verticillium are dealt with in this paper.Kevin D.Hyde R.Henrik Nilsson S.Aisyah Alias Hiran A.Ariyawansa Jaime E.Blair Lei Cai Arthur W.A.M.de Cock Asha J.Dissanayake Sally L.Glockling Ishani D.Goonasekara Michal Gorczak Matthias Hahn Ruvishika S.Jayawardena Jan A.L.van Kan Matthew H.Laurence C.AndréLévesque Xinghong Li Jian-Kui Liu Sajeewa S.N.Maharachchikumbura Dimuthu S.Manamgoda Frank N.Martin Eric H.C.McKenzie Alistair R.McTaggart Peter E.Mortimer Prakash V.R.Nair Julia Pawlowska Tara L.Rintoul Roger G.Shivas Christoffel F.J.Spies Brett A.Summerell Paul W.J.Taylor Razak B.Terhem Dhanushka Udayanga Niloofar Vaghefi Grit Walther Mateusz Wilk Marta Wrzosek Jian-Chu Xu JiYe Yan Nan Zhou 2014Fungal Diversity2014,,4:3
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