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| 1 | Influence of soil type and genotype on Cd bioavailability and uptake by rice and implications for food safety显示文摘Cadmium(Cd) entering the human body via the food chain is of increasing concern.This study investigates the effects of soil type and genotype on variations in the Cd concentrations of different organs of nine rice plants grown on two types of soils with two Cd levels.Cd concentrations in nine rice cultivars varied significantly with genotype and soil type(P < 0.01).The Cd concentration was higher in red paddy soil(RP) than in yellow clayey paddy soil(YP).The average Cd concentrations of different organs in three rice types were indica > hybrid > japonica for the Cd treatments and controls.The polished grain concentration in YP and RP soils had a range of 0.055-0.23 mg/kg and 0.13-0.36 mg/kg in the Cd treatment,respectively.Two rice cultivars in YP soil and five rice cultivars in RP soil exceeded the concentration limits in the Chinese Food Hygiene Standard(0.2 mg/kg).The Cd concentrations in roots,stems,and leaves were all significantly and positively correlated to that in polished grain in a single test.The Cd concentrations in polished grain were positively and significantly(P < 0.01) correlated with the calculated transfer factors of stem to grain and leaf to grain Cd transfer.The results indicated that the variations of Cd concentration in grain were related to Cd uptake and the remobilization of Cd from stem and leaf to grain.Also,the cultivars with a strong tendency for Cd-accumulation should be avoided in paddy soil with low soil pH and low organic matter content to reduce the risks to human health from high Cd levels in rice. | Xinxin Ye Yibing Ma Bo Sun | 2012 | Journal of Environmental Sciences2012，24，9： | 34 |
| 2 | 'Micro-deletions' of the human Y chromosome and their relationship with male infertility显示文摘The Y chromosome evolves from an autochromosome and accumulates male-related genes including sex-determining region of Y-chromosome (SRY) and several spermatogenesis-related genes. The human Y chromosome (60 Mb long) is largely composed of repeti-tive sequences that give it a heterochromatic appearance, and it consists of pseudoautosomal, euchromatic, and heterochromatic regions. Located on the two extremities of the Y chromosome, pseudoautosomal regions 1 and 2 (PAR1 and PAR2, 2.6 Mb and 320 bp long, re-spectively) are homologs with the termini of the X chromosome. The euchromatic region and some of the repeat-rich heterochromatic parts of the Y chromosome are called 'male-specific Y' (MSY), which occupy more than 95% of the whole Y chromosome. After evolu-tion, the Y chromosome becomes the smallest in size with the least number of genes but with the most number of copies of genes that are mostly spermatogenesis-related. The Y chromosome is characterized by highly repetitive sequences (including direct repeats, inverted repeats, and palindromes) and high polymorphism. Several gene rearrangements on the Y chromosome occur during evolution owing to its specific gene structure. The consequences of such rearrangements are not only loss but also gain of specific genes. One hundred and fifty three haplotypes have been discovered in the human Y chromosome. The structure of the Y chromosome in the GenBank belongs to haplotype R1. There are 220 genes (104 coding genes, 111 pseudogenes, and 5 other uncategorized genes) according to the most recent count. The 104 coding genes encode a total of about 48 proteins/protein families (including putative proteins/protein families). Among them, 16 gene products have been discovered in the azoospermia factor region (AZF) and are related to spermatogenesis. It has been dis-covered that one subset of gene rearrangements on the Y chromosome, 'micro-deletions', is a major cause of male infertility in some populations. However, controversies exist about different Y chromosome haplotypes. Six AZFs of the Y chromosome have been discov-ered including AZFa, AZFb, AZFc, and their combinations AZFbc, AZFabc, and partial AZFc called AZFc/gr/gr. Different deletions in AZF lead to different content spermatogenesis loss from teratozoospermia to infertility in different populations depending on their Y hap-lotypes. This article describes the structure of the human Y chromosome and investigates the causes of micro-deletions and their relation-ship with male infertility from the view of chromosome evolution. After analysis of the relationship between AZFc and male infertility, we concluded that spermatogenesis is controlled by a network of genes, which may locate on the Y chromosome, the autochromosomes, or even on the X chromosome. Further investigation of the molecular mechanisms underlying male fertility/infertility will facilitate our knowledge of functional genomics. | Zheng Li Christopher J Haines Yibing Han | 2008 | Journal of Genetics and Genomics2008，35，4： | 25 |
| 3 | Curative effect of warming kidney and fortifying spleen recipe on diarrhea-predominant irritable bowel syndrome显示文摘OBJECTIVE:To observe the curative effect of a recipe for warming the kidney and fortifying the spleen on diarrhea-predominant irritable bowel syndrome(IBS-D).METHODS:This multi-center,double-blind,randomized,and controlled trial included 240 patients that met the inclusion criterion and were then divided into two groups of 120.Patients in the treatment group(group A)took modified Sishen Wan orally for warming the kidney and fortifying the spleen and patients in the control group(group B)took a placebo,Chao Maiya,for 4 weeks.28 days after withdrawal,there was a 6-month follow-up to observe patient recurrence condition.The total effective rate,curative effect,and recurrence rate were evaluated after treatment.RESULTS:There was statistical difference(P<0.01)between the two groups in total effective rate(92.24%in the treatment group and 49.07%in the control group),in curative effect of TCM syndrome(90.52%and 47.22%,respectively),and in the recurrence rate(15.79%and 56.86%,respectively)within6 months after treatment.CONCLUSION:Modified Sishen Wan,for warming the kidney and fortifying the spleen,can effectively treat IBS-D and better control its recurrence. | Xiaolan Su Yanping Tang Jing Zhang Yuebin Dong Wei Wei Yibing Bai Yong Liu | 2013 | Journal of Traditional Chinese Medicine2013，33，5： | 22 |
| 4 | Alpha-helical cationic antimicrobial peptides: relationships of structure and function显示文摘Antimicrobial peptides(AMPs),with their extraordinary properties,such as broad-spectrum activity,rapid action and difficult development of resistance,have become promising molecules as new antibiotics.Despite their various mechanisms of action,the interaction of AMPs with the bacterial cell membrane is the key step for their mode of action.Moreover,it is generally accepted that the membrane is the primary target of most AMPs,and the interaction between AMPs and eukaryotic cell membranes(causing toxicity to host cells)limits their clinical application.Therefore,researchers are engaged in reforming or de novo designing AMPs as a‘singleedged sword’that contains high antimicrobial activity yet low cytotoxicity against eukaryotic cells.To improve the antimicrobial activity of AMPs,the relationship between the structure and function of AMPs has been rigorously pursued.In this review,we focus on the current knowledge of α-helical cationic antimicrobial peptides,one of the most common types of AMPs in nature. | Yibing Huang Jinfeng Huang Yuxin Chen | 2010 | Protein & Cell2010，1，2： | 22 |
| 5 | Identification and analysis of type II TGF-β receptors in BMP-9-induced osteogenic differentiation of C3H10T1/2 mesenchymal stem cells显示文摘我们的以前的研究表明了那根骨头形态基因的蛋白质(BMP-9 ) 9 是最有效的 BMP 之一导致间充质的干细胞(MSC ) 的造骨细胞区别。然而,位于 MSC 的 BMP-9-induced osteogenic 区别下面的分子的机制尚待充分被阐明。在这研究,主导否定(DN ) 类型 II TGF- 受体被构造并且介绍干细胞进 C3H10T1/2,然后,在 vitro 并且在 vivo,试金被执行分析并且识别为 BMP-9-induced 要求的类型 II TGF- 受体成骨。我们发现那三 DN 类型 II TGF-受体, DN-BMPRII , DN-ActRII ,和 DN-ActRIIB ,减少的 BMP-9-induced 碱的磷酸酶(高山)活动,在有约束力的元素( SBE )控制了的 BMP-9-induced Smad 导致了减少记者活动, Smad6 和 Smad7 的减少的 BMP-9-induced 表达式,并且减少在在 vivo 的 vitro 和宫外的骨头形成的 BMP-9-induced 矿化作用,最后导致了减少的骨头群众和不成熟的成骨。这些调查结果强烈建议了那三野类型的 II TGF- 受体, BMPRII, ActRII 和 ActRIIB,可以在 C3H10T1/2 房间的 BMP-9-induced osteogenic 区别起一个功能的作用。然而, C3H10T1/2 干细胞能表示 BMPRII 和 ActRII,然而并非 ActRIIB。用 RNA 干扰(RNAi ) ,我们发现那项酶记者活动和高山活动被 BMP-9 导致了因此被禁止与一起 BMPRII 和 ActRII 击倒。一起拿,我们的结果证明 BMPRII 和 ActRII 是在 C3H10T1/2 房间的 BMP-9-induced osteogenic 区别的功能的类型 II TGF- 受体。 | Ningning Wu Yingze Zhao Yibing Yin Yan Zhang Jinyong Luo | 2010 | Acta Biochimica et Biophysica Sinica2010，42，10： | 20 |
| 6 | Breast milk macronutrient composition and the associated factors in urban Chinese mothers显示文摘 | Yang Titi Zhang Yumei Ning Yibing You Lili Ma Defu Zheng Yingdong Yang Xiaoguang Li Wenjun Wang Junkuan Wang Peiyu | 2014 | Chinese Medical Journal2014，，9： | 17 |
| 7 | Spatial patterns of ephemeral plants in Gurbantünggüt Desert显示文摘In the present research,the authors measured parameters of richness,cover and importance value of ephemeral and ephemeroid plants on south-north and east-west transects in the Gurbantünggüt Desert in early spring,and investigated and analyzed the microhabitats,such as terrain,geomorphology,soil physical-chemical properties and crusts. By comparison,the regional differences in the ephemeral distribution in the desert were revealed. The species of ephemeral plants in the south and center are the richest and those in the west are the poorest in the desert. The cover of ephemeral plants in the mid-south is higher than that in the north,and that in the mid-east is higher than that in the west. The response of ephemeral plants to the spatial variation of the desert habitat forms the population-habitat gradient of ephemeral plants. The characteristics are:(1) In the habitat with higher terrain,coarser textured soil with poorer sorting and correspondingly higher organic matter and lower alkali-saline contents,Carex physoides and Eremopyrum orientale are the dominant ephemeral plants;(2) In the dry habitat with lower terrain,looser textured soil,some organic matter,alkali-saline soil,and developed crust,the ephemeral plants Alyssum linifolium and Erodium oxyrrhynchum are of characteristic of drought and alkali-saline tolerance;(3) In the habitat with lower terrain,some water and more alkali-saline soil,the ephemeral plants Neotorularia torulosa and Hypecoum parviflorum being of alkali-saline tolerance are mainly developed. However,most ephemerals are distributed in a habitat order of higher terrain,some organic,and less alkali-saline soil on the above-mentioned ephemeral population-habitat gradient. The spatial gradient of variation in desert microhabitats is small,and as a whole,the physio-logical character of mesophytism is represented by the desert ephemerals. | QIAN YiBing WU ZhaoNing ZHANG LiYun ZHAO RuiFeng WANG XiaoYan LI YouMin | 2007 | Chinese Science Bulletin2007，52，22： | 16 |
| 8 | Genotypic variations in the accumulation of Cd exhibited by different vegetables显示文摘It is an important approach to use the Cd-contaminated soils properly by growing low accumulator or excluder plants for Cd to produce safe foods. To find the suitable vegetable species for growing in Cd-contaminated soils, in the present study the variations in the Cd accumulation for twenty eight vegetable species and several cultivars of five common vegetables (cowpea, kidney pea, bitter gourd, cucumber and squash) were investigated in two soil Cd levels (1 and 2 mg/kg Cd). Experimental results showed that highly significant differences in Cd concentration were evident among 28 vegetables. For example, spinach Cd concentrations were 110-fold and 175-fold higher than that of sweet pea under the 1 and 2 mg/kg Cd exposures, respectively. For Cd accumulation, the order of vegetable species was: leafy vegetables > solanaceous vegetables > kale vegetables > root vegetables > allimus > melon vegetables > legumes. Distinctive differences were also identified when comparing different cultivars of the five common vegetables with an average range of 0.003–0.094 mg/kg Cd. Our results indicated that a large genotypic variation existed among vegetable species or cultivars when subjected to Cd exposure. Therefore, it is important and feasible to elect/breed vegetable species/cultivars with low accumulation of Cd, especially in mildly Cd-contaminated soils. | Junxing Yang Haitao Guo Yibing Ma Liqun Wang Dongpu Wei Luo Hua | 2010 | Journal of Environmental Sciences2010，22，8： | 16 |
| 9 | Accurate Evaluation of Free-form Surface Profile Error Based on Quasi Particle Swarm Optimization Algorithm and Surface Subdivision显示文摘Although significant progress has been made in precision machining of free-form surfaces recently, inspection of such surfaces remains a difficult problem. In order to solve the problem that no specific standards for the verification of free-form surface profile are available, the profile parameters of free-form surface are proposed by referring to ISO standards regarding form tolerances and considering its complexity and non-rotational symmetry. Non-uniform rational basis spline(NURBS) for describing free-form surface is formulated. Crucial issues in surface inspection and profile error verification are localization between the design coordinate system(DCS) and measurement coordinate system(MCS) for searching the closest points on the design model corresponding to measured points. A quasi particle swarm optimization(QPSO) is proposed to search the transformation parameters to implement localization between DCS and MCS. Surface subdivide method which does the searching in a recursively reduced range of the parameters u and v of the NURBS design model is developed to find the closest points. In order to verify the effectiveness of the proposed methods, the design model is generated by NURBS and the measurement data of simulation example are generated by transforming the design model to arbitrary position and orientation, and the parts are machined based on the design model and are measured on CMM. The profile errors of simulation example and actual parts are calculated by the proposed method. The results verify that the evaluation precision of freeform surface profile error by the proposed method is higher 10%-22% than that by CMM software. The proposed method deals with the hard problem that it has a lower precision in profile error evaluation of free-form surface. | WEN Xiulan ZHAO Yibing WANG Dongxia ZHU Xiaochun XUE Xiaoqiang | 2013 | Chinese Journal of Mechanical Engineering2013，26，2： | 13 |
| 10 | Zircon U-Pb age of granitic gneiss on Duku highway in western Tianshan of China and its geological implications显示文摘Granitle gneiss on Duku highway in western Tianshan has been dated by the U-Pb zircon method. When plotted on the concordia diagram, the results give linear data array and the upper intercept age of (882±3)Ma, and the age was considered as the crystallization age of the protolith. Granitic gneiss has high ASI value (1.09), high LILE and LREE contents, significantly negative Eu depletion, distinctly negative Ba, Sr, P, Ti and Nb anomalies and indicate continental crust parentage, which is consistent with high initial 87Sr/86Sr ratios value (0.7170) and very negative εNd(t)=-14.1. The protolith magma is interpreted as a product of partial melting of the basement rocks of older basement crust. | Yibing Chen Aiqin Hu Guoxin Zhang Qianfeng Zhang | 2000 | Chinese Science Bulletin2000，45，7： | 13 |
| 11 | Mechanism of taurine-induced apoptosis in human colon cancer cells显示文摘公牛(字形物) 被显示了拥有癌症通过 apoptosis 的正式就职的治疗学的效果,当它的反癌症效果的内在的 molecularmechanism 很好没被理解时。美洲狮(apoptosis 的 p53-upregulated 调节的人) 在 p53 依赖、独立的 manners.However 在在许多人的肿瘤房间感应的 apoptosis 的过程玩 importantrole,美洲狮是否在癌症房间涉及导致字形物的 apoptosis 的过程,很好没被学习。在 thepresent 学习,我们与不同 concentrationsof 字形物对待人的 colorectal 癌症房间 HT-29 (变异的 p53 ) 和 LoVo (野类型的 p53 ) ,它在两根房间线导致了房间增长和 apoptosis 的正式就职的压抑。同时,我们 alsoobserved 美洲狮和高度的增加的表示 Bax/Bcl-2 比率。在导致字形物的 apoptosis 决定美洲狮的角色,我们使用了小介入的 RNA 干扰压制美洲狮表示。作为结果, apoptosis 在反应 toTau 治疗被减少。所有这些结果显示那美洲狮在人的 colorectalcancer 房间在导致字形物的 apoptosis 小径起一个关键作用。涉及字形物的反肿瘤效果的分子的机制的示范可能在为 p53 缺乏的 colorectal 癌症的 therapeutictarget 选择是有用的。 | Xiali Zhang Shuo Tu Yibing Wang Baohua Mu Fusheng Wan | 2014 | Acta Biochimica et Biophysica Sinica2014，46，4： | 12 |
| 12 | The Coix Genome Provides Insights into Panicoideae Evolution and Papery Hull Domestication显示文摘Coix is a grass crop domesticated as early as the Neolithic era.It is still widely cultivated for both highly nutritional food and medicinal use.However,the genetic study and breeding of this crop are hindered by the lack of a sequenced genome.Here,we report de novo sequencing and assembly of the 1619-Mb genome of Coix,and annotation of 75.39%repeats and 39629 protein-coding genes.Comparative genomics analysis showed that Coix is more closely related to sorghum than maize,but intriguingly only Coix and maize had a recent genome duplication event,which was not detected in sorghum.We further constructed a genetic map and mapped several important traits,especially the strength of hull.Selection of papery hull(thin:easy dehulling)from the stony hull(thick:difficult dehulling)in wild progenitors was a key step in Coix domestication.The papery hull makes seed easier to process and germinate.Anatomic and global transcriptome analysis revealed that the papery hull is a result of inhibition of cell division and wall biogenesis.We also successfully demonstrated that seed hull pressure resistance is controlled by two major quantitative trait loci(QTLs),which are associated with hull thickness and color,respectively.The two QTLs were further fine mapped within intervals of 250 kb and 146 kb,respectively.These resources provide a platform for evolutionary studies and will facilitate molecular breeding of this important crop. | Chao Guo Yanan Wang Aiguo Yang Jun He Chaowen Xiao Shanhua Lv Fengming Han Yibing Yuan Yuan Yuan Xiaolong Dong Juan Guo YawenYang-Hailan Liu Ningzhi Zuo Yaxi Hu Kangxu Zhao Zhengbo Jiang Xing Wang Tingting Jiang Yaou Sherf Moju Cao Yuan Wang Zhaobo Long Tingzhao Rong Luqi Huang Shufeng Zhou | 2020 | Molecular Plant2020，13，2： | 11 |
| 13 | Second variation of harmonic maps between Finsler manifolds显示文摘The first and second variation formulas of the energy functional for a nondegenerate map between Finsler manifolds is derived. As an application, some nonexistence theorems of nonconstant stable harmonic maps from a Finsler manifold to a Riemannian manifold are given. | SHEN Yibing ZHANG Yan | 2004 | Science China Mathematics2004，47，1： | 10 |
| 14 | Vegetation patterns and species-environment relationships in the Gurbantunggut Desert of China显示文摘Gurbantunggut 沙漠在中国是最大的马厩和半马厩沙沙漠,还很少数据为这些多样的荒芜的风景在植被模式和种类环境关系上存在。调查区域的沙沙丘主要具有 | QIAN Yibing WU Zhaoning ZHAO Ruifeng ZHANG Liyun | 2008 | Journal of Geographical Sciences2008，18，4： | 10 |
| 15 | Khler Finsler Metrics Are Actually Strongly Khler显示文摘In this paper, the Khler conditions of the Chern-Finsler connection in complex Finsler geometry are studied, and it is proved that Khler Finsler metrics are actually strongly Khler. | Bin CHEN Yibing SHEN | 2009 | Chinese Annals of Mathematics,Series B2009，30，2： | 9 |
| 16 | Spatial heterogeneity for grain size distribution of eolian sand soil on longitudinal dunes in the southern Gurbantunggut Desert显示文摘The grain size composition, distribution characteristics and spatial variation of eolian sand soil on distinct positions across two longitudinal dunes and interdune areas were studied by means of conventional grain size analysis and geostatistical methods. In the study, 184 samples of eolian sand soil from the 0-30cm layer were systemically collected and measured from two longitudinal dunes and interdunes in the southern Gurbantunggut Desert. The results show that the dominant grain sizes are fine and very fine sands, and the differences of grain size compositions between the distinct geomorphologic positions are significant. The contents of clay and silt are highest on the interdune areas and lowest on the crests, and higher on the leeward slopes than on the windward slopes. The contents of very fine and fine sands are highest on the windward slopes and lowest on the crests. The contents of medium, coarse and very coarse sands are lowest on the interdune lands, and highest on the crests, and are identical on the two slopes. The coarser sizes (φ1) and mean sizes (Mz) for eolian sand soil all have a varying tendency from fine to coarse sizes with interdune area → leeward slope → windward slope → crest, and the sorting (σ) are poorly to well sorted. The results of geostatistical analysis reveal that φ1, Mz and σ values are moderately to strongly spatially autocorrelated. The values of the spatially correlated ranges are φ1<σ | Qian, YiBing Wu, ZhaoNing Yang, HaiFeng Jiang, Chao | 2009 | Journal of Arid Land2009，1，1： | 9 |
| 17 | Vegetation-environment Relationships Between Northern Slope of Karlik Mountain and Naomaohu Basin,East Tianshan Mountains显示文摘Based on data from 22 sample plots and applying the Canonical Correspondence Analysis (CCA),this paper discusses the vegetation-environment relationships between the northern slope of Karlik Mountain and Naomaohu Basin,which is situated in the easternmost end of the Tianshan Mountains,Xinjiang Uygur Autonomous Region,China.For the zonal vegetation,community diversity of mountain vegetation is higher than that of the desert vegetation due to environmental factors.The CCA ordination diagram revealed that the composition and distribution of vegetation types are mainly determined by altitude,soil pH and soil salt content.With increasing elevation,the soil pH and total salt content decrease but the contents of soil organic matter,soil water,total nitrogen and total phosphorus increase gradually.In the CCA ordination diagrams,the sample plots and main species can be divided into five types according to their adaptations to the environmental factors.Type I is composed of desert vegetation distributed on the low mountains,hills,plains and deserts below an elevation of 1900 m;type II is distributed in the mountain and desert ecotone with an elevation of 1900-2300 m,and includes steppe desert,desert steppe and wetland meadow;type III is very simply composed of only salinized meadow;type IV is distributed above an elevation of 2300 m,containing mountain steppe,meadow steppe,subalpine meadow and alpine meadow;type V only contains salinized meadow.The results show that with increasing elevation,species combination changes from the xerophytic shrubs,semi-shrubs and herbs distributed in the low altitude zone with arid climate to the cold-tolerant perennial herbs growing in the high altitudinal zone with cold climate. | ZHANG Haiyan QIAN Yibing WU Zhaoning WANG Zhongchen | 2012 | Chinese Geographical Science2012，22，3： | 9 |
| 18 | Distribution characteristics of magnetic susceptibility of the surface sediments in the southern Yellow Sea显示文摘The characteristic distributions of magnetic susceptibility (MS) are analyzed on the basis of susceptibility of 172 surface sediment samples in the southern Yellow Sea (SYS). The preliminary results are as follows: first, the distributions clearly correspond to different modern sediment assemblages in the continental sea, which indicates different sediment origins. With the 30 μCGS isoline being taken as demarcation line, the study area can then be divided into section H (high MS value area) and section L (low MS value area). Section H is mainly adjacent to land with two main sources of the Changjiang River and the Huanghe River.Section L is mainly an eddy sediment area, where Yellow Sea Cold Water is entrenched all the year round. The distribution pattern of MS could tell apart strong or weak hydrodynamic conditions and has a close relation to the circulation system in this area. At the areas of the SYS Circumfluent and northern East China Sea (NECS) Circumfluent (weak hydrodynamic), the MS has low values, while in the areas of Coastal Current (strong hydrodynamic), the values are high.At the same time, the oxidizing areas tend to take on higher MS, while the reducing areas have lower one. It seems safe to say that the MS in the continental sea reflects more of the sediment origin and sedimentary environment, which is different from that of loess, lake and surface soil as a climate proxy. | GE Shulan~(1,2,3), SHI Xuefa~1 & HAN Yibing~1 1. Key Laboratory of Marine Sedimentology and Environmental Geology, First Institute of Oceanography, State Oceanic Administration. Qingdao 266061. China 2. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029. China 3. Graduate School. Chinese Academy of Sciences, Beijing 100039. China | 2003 | Chinese Science Bulletin2003，48，B06： | 8 |
| 19 | Effect of Transition Metals (Cu, Co and Fe) on the Autothermal Reforming of Methane over Ni/Ce_(0.2)Zr_(0.1)Al_(0.7)O_δ Catalyst显示文摘The transition metals (Cu, Co, and Fe) were applied to modify Ni/Ce0.2Zr0.1 Al0.7Oδcatalyst. The effects of transition metals on the catalytic properties of Ni/Ce0.2Zr0.1 Al0.7Oδautothermal reforming of methane were investigated. The Ni-supported catalysts were characterized by XRD, TPR and XPS. Tests in autothermal reforming of methane to hydrogen showed that the addition of transition metals (Cu and Co) significantly increased the activity of catalyst under the conditions of lower reaction temperature, and Ni/Cu0.05Ce0.2Zr0.1Al0.65Oδwas found to have the highest conversion of CH4 among all catalysts in the operation temperatures ranging from 923 K to 1023 K. TPR, XRD and XPS measurements indicated that the cubic phases of CexZr1-xO2 solid solution were formed in the preparation process of catalysts. Strong interaction was found to exist between NiO and CexZr1-xO2 solid solution. The addition of Cu improved the dispersion of NiO, inhibited the formation of NiAl2O4, and thus significantly promoted the activity of the catalyst Ni/Cu0.05Ce0.2Zr0.1Al0.65Oδ. | Xinfa Dong Xiulan Cai Yibing Song Weiming Lin | 2007 | Journal of Natural Gas Chemistry2007，16，1： | 7 |
| 20 | Some projectively flat (α,β)-metrics显示文摘In this paper, we study a class of Finsler metrics in the form F = α + ∈β + 2k β2/α-k2β4/3α3 , where α= (√aijyiyj) is a Riemannian metric, β = biyi is a 1-form, and ∈ and k ≠ 0 are constants. We obtain a sufficient and necessary condition for F to be locally projectively flat and give the non-trivial special solutions. Moreover, it is proved that such projectively flat Finsler metrics with the constant flag curvature must be locally Minkowskian. | SHEN Yibing ZHAO Lili | 2006 | Science China Mathematics2006，49，6： | 7 |
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