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    题名 作者 年代 出处 被引量
1Changes in heavy metal contents in animal feeds and manures in an intensive animal production region of China显示文摘The 360 feed and manure samples were collected from 150 animal farms in Jiangsu Province, China and analyzed for heavy metals. Concentrations of Zn and Cu in animal feeds were 15.9–2041.8 and undetected–392.1 mg/kg respectively, while Hg, As, Pb, Cd, and Cr in all feeds were below 10 mg/kg. Concentrations of Cu, Zn, and Cr in animal manures were 8.4–1726, 39.5–11379, and 1.0–1602 mg/kg respectively, while As, Cd, Hg, and Pb were < 10 mg/kg. The concentration of Cu, Zn, As and Cr in animal feed and manure were positively correlated(p < 0.001), but the Cd, Hg, and Pb were not statistically correlated between the feed and the manure. Concentrations of Cu and Zn were highest in pig feed and manure, followed by poultry and dairy feeds and manures. During 1990– 2008, Cu, Zn, As, Cr, Cd contents increased by 771%, 410%, 420%, 220%, and 63% in pig manure, 212%, 95%, 200%, 791%, and –63% in dairy manure, and 181%, 197%, 1500%, 261, and 196% in poultry manure. Most of the increases occurred from 2002 to 2008, which reflects the extensive use of feed additives after 2002. In contrast, Pb and Hg in manures continuously decreased from 1990 to 2008. The results suggest that the heavy metal contents in animal manure have been greatly increased over 18 years and the contribution of manures to soil should be considered.Hui Wang Yuanhua Dong Yunya Yang Gurpal S.Toor Xumei Zhang 2013Journal of Environmental Sciences2013,25,12:54
2Pretreatment with Danhong injection protects the brain against ischemia-reperfusion injury显示文摘Danhong injection(DHI),a Chinese Materia Medica standardized product extracted from Radix Salviae miltiorrhizae and Flos Carthami tinctorii,is widely used in China for treating acute ischemic stroke.In the present study,we explored the neuroprotective efficacy of DHI in a rat model of temporary middle cerebral artery occlusion,and evaluated the potential mechanisms underlying its effects.Pretreatment with DHI(0.9 and 1.8 mL/kg)resulted in a significantly smaller infarct volume and better neurological scores than pretreatment with saline.Furthermore,DHI significantly reduced the permeability of the blood-brain barrier,increased occludin protein expression and decreased neutrophil infiltration,as well as profoundly suppressing the upregulation of matrix metallopeptidase-9 expression seen in rats that had received vehicle.Matrix metallopeptidase-2 expression was not affected by ischemia or DHI.Moreover,DHI(1.8 mL/kg)administered 3 hours after the onset of ischemia also improved neurological scores and reduced infarct size.Our results indicate that the neuroprotective efficacy of DHI in a rat model of cerebral ischemia-reperfusion injury is mediated by a protective effect on the blood-brain barrier and the reversal of neutrophil infiltration.Shaoxia Wang Hong Guo Xumei Wang Lijuan Chai Limin Hu Tao Zhao Buchang Zhao Xiaoxu Tan Feifei Jia 2014Neural Regeneration Research2014,9,15:12
3Humification degree of peat and its implications for Holocene climate change in Hani peatland,Northeast China显示文摘The humification degree of peat is a significant climatic proxy for paleoclimate change.Using the alkali-extraction method,a time series of absorbance values of the Hani peatland,Northeast China,was determined,which is used as an indicator for the humification degree of peat.Combined with14C dating data of peat cellulose,and compared withδ18O andδ13C time series of the cellulose in the Hani peatland,the evidence for the existence of14 ka paleoclimate was provided.Higher humification degrees hint a warmer-wetter climate,and vice versa.It also reconstructs the four stages of Holocene climate evolution in this region:11.5–9.8 cal ka B.P.,warm and wet period;9.8–9.0 cal ka B.P.,cold and dry period;9.0–4.8 cal ka B.P.,warm and wet period;and 4.8–0 cal ka B.P.,warm-wet and dry-cold alternation period.Meanwhile,it is revealed that the abrupt climate shifts signals such as the '8.2 ka' event and the '4.2 ka' event.Results showed that the Hani peat humification degree is of sensitive response to paleoclimate change.Therefore,it is a feasible method to analyze the relationship between paleoclimate change and peat humification degree.HUANG Ting CHENG Shenggao MAO Xumei HONG Bing HU Zhongxia ZHOU Ying 2013Chinese Journal Of Geochemistry2013,32,4:6
4The influence of volcanism on paleoclimate in the northeast of China:Insights from Jinchuan peat,Jilin Province,China显示文摘Just like contemporary sediments, peat itself is a good repository of information about climate change, the effects of volcanic activity on climate change have been truly recorded in peat, since it is a major archive of volcanic eruption incidents. A section of sand was identified as tephra from the Jinchuan peat, Jilin Province, China, for the grains look like slag with surface bubbles and pits, characterized by high porosity, and loose structure with irregular edges and corners. According to the peat characteristics of uniform deposition, the tephra was dated at 2002-1976 a B.P. by way of linear interpolation, so the time of volcanic eruption was 15 B.C.-26 A.D. (the calibrated age). While the geochemical characteristics of tephra in this study are quite the same as those of tephra from the Jinlongdingzi volcano at Longgang and from alkaline basaltic magma, with the contents of SiO2<55%, and the similar contents to Al2O3 and Fe, but the contents of Na2O>K2O. We speculated that the tephra in this study came from the Longgang volcano group. Compared with 11 recorded volcanic eruption events as shown on the carbon and oxygen isotope curves of the Jinchuan peat cellulose, it is obviously seen that adjacent or large-scale volcanic eruptions are precisely corresponding to the minimum temperature and humidity. It seems that these volcanic eruptions indeed affected the local climate, leading to the drop of regional temperature and humidity. As a result, there was prevailing a cold and dry climate there, and all these changes can be well recorded in peat. So the comparison of volcanic eruption events with information about climate change developed from peat, can provide strong evidence for the impact of volcanism on climate change.MAO Xumei CHENG Shenggao HONG Yetang ZHU Yongxuan WANG Fenglin 2009Chinese Journal Of Geochemistry2009,28,2:5
5Effects of folic acid on in vitro astrocytic differentiation of neural stem cells from neonatal rats显示文摘BACKGROUND:Folic acid is essential for normal functioning of the nervous system.Previous studies have focused on the effects of folic acid on astrocyte proliferation. OBJECTIVE:To explore the effects of folic acid on astrocyte differentiation of neural stem cells (NSCs) and the related mechanisms in vitro. DESIGN,TIME AND SETTING:A randomized,controlled,grouping experiment was performed in Tianjin Medical University between August 2007 and October 2008. MATERIALS:Folic acid and 5-bromo-2-deoxyuridine(BrdU) were obtained from Sigma,MO,USA. Primary antibodies[rabbit anti-rat nestin,β-tubulin-Ⅲ,glial fibrillary acidic protein,and neurogenin1 (Ngn1);mouse anti-rat BrdU andβ-actin monoclonal antibodies]were purchased from Santa Cruz Biotechnology,USA. METHODS:At 6 days of NSC proliferation from 24-hour-old neonatal rats,BrdU incorporation assay was performed.Seven days after primary culture,NSCs were induced to differentiate with medium containing 5%fetal bovine serum.Cultured NSCs were assigned to three groups:control,low-dose (liquid media with 8 mg/L folic acid),and high-dose folic acid(liquid media with 44 mg/L folic acid). MAIN OUTCOME MEASURES:At day 7 after primary culture,the cells were identified as NSCs by immunocytochemical methods.Double-label immunofluorescence technique for glial fibrillary acidic protein/BrdU detected differentiated cells 7 days after induction.Western blot was used to analyze expression of Ngn1 protein in NSCs. RESULTS:In serum-free suspension medium,neurospheres comprised a large number of Nestin-, glial fibrillary acidic protein-,β-tubulin-Ⅲ-,and BrdU-positive cells.Compared with the control group, high-dose folic acid supplementation led to an marked increase in the percentage of glial fibrillary acidic protein/BrdU-positive cells(P<0.05),and significantly decreased Ngn1 protein expression (P<0.05). CONCLUSION:Folic acid promotes astrocytic differentiation of NSCs,which might be related to downregulation of Ngn1 protein expression.Xumei Zhang Guowei Huang Zhihong Tian Guanglei Wang Dalin Ren 2009Neural Regeneration Research2009,4,8:4
6Geochemistry of rare-earth elements in shallow groundwater, northeastern Guangdong Province, China显示文摘Shallow groundwater and hot springs were collected from northeastern Guangdong Province, Southeast China, to determine the concentrations and fractionation patterns of rare-earth elements(REE). The results show that the La, Ce and Nd of REEs are abundant in groundwater and rock samples, and the ∑REE contents in groundwater and rock samples range from 126.5 to 2875.3 ng/L, and 79.44 to 385.85 mg/L, respectively. The shallow groundwater has slightly HREE-enriched PAAS-normalized patterns. However, the granitic rocks PAAS-normalized patterns, with remarkable negative Eu anomalies, are different from that of shallow groundwater. The enrichment of HREE is considered to be controlled by REE complexation and readsorption for most groundwater has Ce and Eu positive anomalies. The Ce and Eu anomalies in groundwater are controlled by redox conditions. Moreover, the Fe-contain sediments dissolution and/or the reduction of Fe oxyhydroxides are another factor contributing to Ce anomalies. The Eu anomalies in groundwater are controlled by the preferential mobilization of Eu2+ during water-rock interaction compared to Eu3+.YUAN Jianfei MAO Xumei WANG Yanxin DENG Zhide HUANG Leihui 2014Chinese Journal Of Geochemistry2014,33,1:4
7Capturing and storage of CO_2 by micron-nano minerals:Evidence from the nature显示文摘The increase of CO2 in atmosphere is a main factor leading to 'greenhouse effect', which causes more and more serious global environmental problems. The reduction of CO2 is a challenge for the survival of human beings, and it is also a big technical problem. CO2 fluid-rock interaction is a key scientific problem involved in geo-logical storage. The CO2 fluid-rock interaction has a variety of multi-scale changes. Due to great differences in the quantity of surface atoms and surface energy between micron-nano-sized minerals, and ions and crystals, the speed and efficiency of CO2 fluid-rock interaction on a micron-nano scale are much higher than those on other scales. As is known from the natural world, the micron-nano structures of pores and the surface chemical modification of natural porous minerals (zeolite, diatomite, sepiolite, palygorskite, halloysite, etc.) should be further investigated, which can be used as the micron-nano -mineral porous materials with high capacity and high efficiency for capturing CO2. Through simulating the adsorption capacity and process of CO2 by minerals in the natural world, the micron-nano technology is applied to calcium- and magnesium-based minerals (olivine, pyroxene, feldspar, clay, etc.) so as to improve the activity of calcium and magnesium and enlarge the reaction contact area. In this way, the efficiency of capturing and storage of CO2 by calcium- and magnesium-based minerals can be greatly improved. These minerals can also be used as the micron-nano-mineral materials with large capacity and high efficiency for capturing and storing CO2.MAO Xumei TIAN Xike YU Chengyong 2011Chinese Journal Of Geochemistry2011,30,4:4
8The Architecture and Operation Mode of Virtual Supply Chain显示文摘Xumei Zhang Dan Bin 2003Chinese Business Review2003,2,4:4
9Preparation of novel Ni-Ir/γ-Al_2O_3 catalyst via high-frequency cold plasma direct reduction process显示文摘The novel Ni-Ir/γ-Al2O3 catalyst, denoted as NIA-P, was prepared by high-frequency cold plasma direct reduction method under ambient conditions without thermal treatment, and the conventional sample, denoted as NIA-CR, was prepared by impregnation, thermal calcination, and then by H2 reduction method. The effects of reduction methods on the catalysts for ammonia decomposition were studied, and they were characterized by XRD, N2 adsorption, XPS, and H2-TPD. It was found that the plasma-reduced NIA-P sample showed a better catalytic performance, over which ammonia conversion was 68.9%, at T = 450 °C, P = 1 atm, and GHSV = 30, 000 h-1. It was 31.7% higher than that of the conventional NIA-CR sample. XRD results showed that the crystallite size decreased for the sample with plasma reduction, and the dispersion of active components was improved. There were more active components on the surface of the NIA-P sample from the XPS results. This effect resulted in the higher activity for decomposition of ammonia. Meanwhile, the plasma process significantly decreased the time of preparing catalyst.Liqiong Huang Wei Chu Tao Zhang YongxiangYin Xumei Tao 2009Journal of Natural Gas Chemistry2009,18,1:3
10Preparation and characterization of microcrack-free thick YBa_2Cu_3O_(7-δ) films显示文摘High quality epitaxial YBa2Cu3O7-δ (YBCO) superconducting films were fabricated on (00l) LaAlO3 substrates using the direct-current sputtering method. The attainment of an unusually high film thickness (up to 2.0 μm) without mi-crocracking was attributed in part to the presence of pores correlated with yttrium-rich composition in the films. The influ-ence of the film thickness on the microstructure was investigated by X-ray diffraction conventional scan (θ-2θ,ω-scan,pole figure) and high-resolution reciprocal space mapping. The films were c-axis oriented with no a-axis-oriented grains up to the thickness of 2 μm. The surface morphology and the critical current density (Jc) strongly depended on the film thickness. Furthermore,the reasons for these thickness dependences were elucidated in detail.XIONG Jie QIN Wenfeng TANG Jinlong TAO Bowan CUI Xumei LI Yanrong 2007Rare Metals2007,26,5:3
11Use RAPD Analysis to Classify Tea Trees in Yunnan显示文摘RAPD assessment on genetic variations of 45 tea trees in Yunnan was carried out. Eight primers selected from 40 random primers were used to amplify 45 tea samples, and a total of 95 DNA bands were amplified, of which 90 (94.7 %) were polymorphism. The average number of DNA bands amplified by each primer was 11.5. Based on the results of UPGMA cluster analysis of 95 DNA bands amplified by 8 primers,all the tested materials could be classified into 7 groups including 5 complex groups and 2 simple groups, which was basically identical with morphological classification. In addition, there were some speciations in 2 simple groups.SHAOWan-fang PANGRui-hua DUANHong-xing WANGPing-sheng XUMei 2003Agricultural Sciences in China2003,2,11:3
12Effects of precursor solution concentration on the properties and morphology of YBCO films deposited by TFA-MOD method显示文摘Epitaxial YBCO films were deposited on (100) LaAlO3 single-crystal substrates by metalorganic deposition ofmetal trifluoroacetate precursors with different concentrations. All the YBCO films have Tc around 91 K and Jc excess 2MA/cm2 at 77 K in zero field. XRD θ-2θscans show all the films have c-axis normal orientation. The FWHM (full width athalf-maximum intensity) values of X-ray ω-scans of (005) reflection are 0.379°, 0.283°, and 0.543° for the YBCO thin filmsdeposited with precursor solution concentrations of 1.52, 1.0, and 0.75 mol/L, respectively. With the concentration of theprecursors decreasing, the thickness of the films decreases linearly. SEM micrographs show that porosities in the films be-come bigger with the precursor solution concentration decreasing. The big porosities in the film with the lowest concentra-tion precursor deteriorate the superconducting property and make it have a wider superconducting transition and a lower Jc.CUI Xumei TAO Bowan LI Yanrong LIU Xingzhao CHEN Jiajun XIONG Jie 2005Rare Metals2005,24,3:2
13Thickness-induced residual stresses in textured YBCO thin lms determined by crystalline group method显示文摘Xiong Jie Qin Wenfeng Cui Xumei 2007Physica C2007,455,12:1
14Comparative study of emissions from bus rapid transit and conventional bus systems显示文摘Chen Xumei Yu Lei Song Guohua 2012Transportation Research Board2012,2277,:1
15Analyzing ur- ban bus service reliability at the stop, route, and network levels 显示文摘Chen Xumei Yu Lei Zhang Yushi 2009Transportation Research Part A : Policy and Practice2009,43,8:1
16Deciphering spike architecture formation towards yield improvement in wheat显示文摘Wheat is the most widely grown crop globally,providing 20%of the daily consumed calories and protein content around the world.With the growing global population and frequent occurrence of extreme weather caused by climate change,ensuring adequate wheat production is essential for food security.The archi-tecture of the inflorescence plays a crucial role in determining the grain number and size,which is a key trait for improving yield.Recent advances in wheat genomics and gene cloning techniques have improved our understanding of wheat spike development and its applications in breeding practices.Here,we summarize the genetic regulation network governing wheat spike formation,the strategies used for identifying and studying the key factors affecting spike architecture,and the progress made in breeding applications.Additionally,we highlight future directions that will aid in the regulatory mechanistic study of wheat spike determination and targeted breeding for grain yield improvement.Xumei Luo Yiman Yang Xuelei Lin Jun Xiao 2023Journal of Genetics and Genomics2023,50,11:1
17Recommendation for Cardiac Magnetic Resonance Imaging-Based Phenotypic Study:Imaging Part显示文摘Cardiac magnetic resonance(CMR)imaging provides important biomarkers for the early diagnosis of many cardiovascular diseases and has been reported to reveal phenome-wide associations of cardiac/aortic structure and functionality in popula-tion studies.Nevertheless,due to the complexity of operation and variations among manufactural vendors,magnetic field strengths,coils,sequences,scan parameters,and image analysis approaches,CMR is rarely used in large cohort studies.Existing guidelines mainly focused on the diagnosis of cardiovascular diseases,which did not aim to basic research.The purpose of this study was to propose a recommendation for CMR based phenotype measurements for cohort study.We classify the imaging sequences of CMR into three categories according to the importance and universality of correspond-ing measurable phenotypes.The acquisition time and repeatability of the phenotypic measurement were also taken into consideration during the categorization.Unlike other guidelines,this recommendation focused on quantitative measurement of large amount of phenotypes from CMR.Chengyan Wang Yan Li Jun Lv Jianhua Jin Xumei Hu Xutong Kuang Weibo Chen He Wang 2021Phenomics2021,1,4:1
18Overexpression of MdATG8i improves water use efficiency in transgenic apple by modulating photosynthesis, osmotic balance, and autophagic activity under moderate water deficit显示文摘Water deficit is one of the major limiting factors for apple(Malus domestica)production on the Loess Plateau,a major apple cultivation area in China.The identification of genes related to the regulation of water use efficiency(WUE)is a crucial aspect of crop breeding programs.As a conserved degradation and recycling mechanism in eukaryotes,autophagy has been reported to participate in various stress responses.However,the relationship between autophagy and WUE regulation has not been explored.We have shown that a crucial autophagy protein in apple,MdATG8i,plays a role in improving salt tolerance.Here,we explored its biological function in response to long-term moderate drought stress.The results showed that MdATG8i-overexpressing(MdATG8i-OE)apple plants exhibited higher WUE than wild-type(WT)plants under long-term moderate drought conditions.Plant WUE can be increased by improving photosynthetic efficiency.Osmoregulation plays a critical role in plant stress resistance and adaptation.Under long-term drought conditions,the photosynthetic capacity and accumulation of sugar and amino acids were higher in MdATG8i-OE plants than in WT plants.The increased photosynthetic capacity in the OE plants could be attributed to their ability to maintain optimal stomatal aperture,organized chloroplasts,and strong antioxidant activity.MdATG8i overexpression also promoted autophagic activity,which was likely related to the changes described above.In summary,our results demonstrate that MdATG8i-OE apple lines exhibited higher WUE than WT under long-term moderate drought conditions because they maintained robust photosynthesis,effective osmotic adjustment processes,and strong autophagic activity.Xin Jia Ke Mao Ping Wang Yu Wang Xumei Jia Liuqing Huo Xun Sun Runmin Che Xiaoqing Gong Fengwang Ma 2021Horticulture Research2021,8,1:1
19Coordinating adual-channel supply chain with risk-averse under a two-way revenuesharing contract 显示文摘Xu Guangye Dan Bin Zhang Xumei 2014International Journal of Production Economics2014,,147:1
20Thickness-induced residual stresses in textured YBCO thin films determined by crystalline group method显示文摘Jie X Wenfeng Q Xumei C 2007Physica C2007,455,:1
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