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| 1 | Biodegradation of Crude Oil in Contaminated Soils by Free and Immobilized Microorganisms显示文摘The effciencies of free and immobilized bacterial cultures of petroleum hydrocarbon degraders were evaluated and compared in this study. Hydrocarbon-degrading microbial communities with high tolerance to and high degrading ability of crude oil were obtained from the soil contaminated with crude oil in the Yellow River Delta. Then, the microbial cells were immobilized in sodium alginate (SA) beads and sodium alginate-diatomite (SAD) beads. The biodegradation of crude oil in soil by immobilized cells was compared with that by free cells at three inoculation concentrations, 1 × 104 colony forming units (cfu) kg-1 (low concentration, L), 5 × 104 cfu kg-1 (medium concentration, M), and 1 × 105 cfu kg-1 (high concentration, H). At 20 d after inoculation, the maximum degradation rate in the immobilized systems reached 29.8% (SAD-M), significantly higher (P < 0.05) than that of the free cells (21.1%), and the SAD beads showed greater degradation than the SA beads. Moreover, both microbial populations and total microbial activity reached significantly higher level (P < 0.05) in the immobilized systems than free cell systems at a same initial inoculation amount. The scanning electronic microscope (SEM) images also confirmed the advantages of the immobilized microstructure of SAD beads. The enhanced degradation and bacterial growth in the SAD beads indicated the high potential of SAD beads as an effective option for bioremediation of crude oil-contaminated soils in the Yellow River Delta. | WANG Zhen-Yu XU Ying WANG Hao-Yun ZHAO Jian GAO Dong-Mei LI Feng-Min B. XING | 2012 | Pedosphere2012，22，5： | 28 |
| 2 | New exact solutions for free vibrations of rectangular thin plates by symplectic dual method显示文摘The separation of variables is employed to solveHamiltonian dual form of eigenvalue problem for transversefree vibrations of thin plates,and formulation of the naturalmode in closed form is performed.The closed-form natu-ral mode satisfies the governing equation of the eigenvalueproblem of thin plate exactly and is applicable for any typesof boundary conditions.With all combinations of simply-supported(S)and clamped(C)boundary conditions appliedto the natural mode,the mode shapes are obtained uniquelyand two eigenvalue equations are derived with respect to twospatial coordinates,with the aid of which the normal modesand frequencies are solved exactly.It was believed that theexact eigensolutions for cases SSCC,SCCC and CCCC wereunable to be obtained,however,they are successfully foundin this paper.Comparisons between the present results andthe FEM results validate the present exact solutions,whichcan thus be taken as the benchmark for verifying differentapproximate approaches. | Y. Xing B. Liu The Solid Mechanics Research Center, Beihang University, 100083 Beijing, China | 2009 | Acta Mechanica Sinica2009，25，2： | 11 |
| 3 | Sorption and Fractionation of a Peat Derived Humic Acid by Kaolinite, Montmorillonite, and Goethite显示文摘Sorption of humic acid (HA) on mineral surfaces has a profound interest regarding the fate of hydrophobic organic contaminants (HOCs) and carbon sequestration in soils. The objective of our study is to determine the fractionation behavior of HA upon sorption on mineral surfaces with varying surface properties. HA was coated sequentially on kaolinite (1:1 clay), montmorillonite (2:1 clay), and goethite (iron oxide) for four times. The unadsorbed HA fractions were characterized by elemental analysis, diffuse reflectance infrared Fourier transform spectroscopy (DRIFT), and solid state 13C nuclear magnetic resonance spectroscopy (NMR). The mineral-HA complexes were characterized by DRIFT. Polarity index [(N+O)/C] revealed higher polarity of the unadsorbed HA fractions after coating on kaolinite, reflecting that relatively higher polarity fractions of HA remain unadsorbed. Sorption of aliphatic alcohol fraction along with carbohydrate was prominent on kaolinite surface. DRIFT results of the unadsorbed HA fractions indicated more sorption of aliphatic moieties on both kaolinite and montmorillonite. DRIFT results of the unadsorbed HA fractions after sorption on kaolinite and goethite showed the sorption of the proteinaceous fractions of HA. The HA fractions obtained after coating on goethite showed significant sorption of carboxylic moieties. The results mentioned above comply reasonably well with the DRIFT spectra of the mineral-HA complexes. 13C NMR results showed higher sorption of anomeric C on kaolinite surface. Higher sorption of paraffinic fraction was observed on montmorillonite. NMR data inferred the sorption of carboxylic moieties on goethite surface. Overall, this study showed that aliphatic moieties of HA preferentially sorbed on kaolinite and montmorillonite, while carboxylic functional groups play a significant role in sorption of HA on goethite. The sorbed fractions of HA may modify the mineral surface properties, and thus, the interaction with organic contaminants. | S. GHOSH WANG Zhen-Yu S. KANG P. C. BHOWMIK B. S. XING | 2009 | Pedosphere2009，19，1： | 9 |
| 4 | Neural stem cell properties of Müller glia in the mammalian retina: Regulation by Notch and Wnt signaling显示文摘 | Ani V. Das Kavita B. Mallya Xing Zhao Faraz Ahmad Sumitra Bhattacharya Wallace B. Thoreson Ganapati V. Hegde Iqbal Ahmad | 2006 | Developmental Biology2006，，1： | 2 |
| 5 | Genetic bases of appearance quality of rice grains in Shanyou 63, an elite rice hybrid显示文摘 | Y. F. Tan Y. Z. Xing J. X. Li S. B. Yu C. G. Xu Qifa Zhang | 2000 | TAG Theoretical and Applied Genetics (-)2000，，5： | 1 |
| 6 | Hedgehog Is an Anti-Inflammatory Epithelial Signal for the Intestinal Lamina Propria显示文摘 | William J. Zacharias Xing Li Blair B. Madison Katherine Kretovich John Y. Kao Juanita L. Merchant Deborah L. Gumucio | 2010 | Gastroenterology2010，，7： | 1 |
| 7 | 查看详情显示文摘 | Xue X.Y Yuan S Xing L.L Chen Z.H. He B. Chen Y | | 0，，： | 1 |
| 8 | Achieving eugastrinemia in MEN1 patients: Both duodenal inspection and formal lymph node dissection are important显示文摘 | Paxton V. Dickson Thereasa A. Rich Yan Xing Gilbert J. Cote Huamin Wang Nancy D. Perrier Douglas B. Evans Jeffrey E. Lee Elizabeth G. Grubbs | 2011 | Surgery2011，，6： | 1 |
| 9 | Investigation of the Hot-Stamping Process for Advanced High-Strength Steel Sheet by Numerical Simulation显示文摘 | H. S. Liu Z. W. Xing J. Bao B. Y. Song | 2010 | Journal of Materials Engineering and Performance2010，，3： | 1 |
| 10 | The stably stratified boundary layer over the great plains显示文摘 | Donald H. Lenschow Xing Sheng Li Cui Juan Zhu B. Boba Stankov | 1988 | Boundary - Layer Meteorology (-)1988，，1： | 1 |
| 11 | Genetic bases of appearance quality of rice grains in Shanyou 63, an elite rice hybrid显示文摘 | Y. F. Tan Y. Z. Xing J. X. Li S. B. Yu C. G. Xu Qifa Zhang | 2000 | TAG Theoretical and Applied Genetics (-)2000，，5： | 1 |
| 12 | Prevalence of Glaucoma in North China: The Beijing Eye Study显示文摘 | Ya Xing Wang Liang Xu Hua Yang Jost B. Jonas | 2010 | American Journal of Ophthalmology2010，，6： | 1 |
| 13 | Anterior Chamber Depth and Chamber Angle and Their Associations with Ocular and General Parameters: The Beijing Eye Study显示文摘 | Liang Xu Wei Fang Cao Ya Xing Wang Chang Xi Chen Jost B. Jonas | 2008 | American Journal of Ophthalmology2008，，5： | 1 |
| 14 | Genetic bases of appearance quality of rice grains in Shanyou 63, an elite rice hybrid显示文摘 | Y. F. Tan Y. Z. Xing J. X. Li S. B. Yu C. G. Xu Qifa Zhang | 2000 | TAG Theoretical and Applied Genetics (-)2000，，5： | 1 |
| 15 | The three important traits for cooking and eating quality of rice grains are controlled by a single locus in an elite rice hybrid, Shanyou 63显示文摘 | Y. F. Tan J. X. Li S. B. Yu Y. Z. Xing C. G. Xu Qifa Zhang | 1999 | TAG Theoretical and Applied Genetics (-)1999，，3： | 1 |
| 16 | Genetic bases of appearance quality of rice grains in Shanyou 63, an elite rice hybrid显示文摘 | Y. F. Tan Y. Z. Xing J. X. Li S. B. Yu C. G. Xu Qifa Zhang | 2000 | TAG Theoretical and Applied Genetics (-)2000，，5： | 1 |
| 17 | Prevalence of Glaucoma in North China: The Beijing Eye Study显示文摘 | Ya Xing Wang Liang Xu Hua Yang Jost B. Jonas | 2010 | American Journal of Ophthalmology2010，，6： | 1 |
| 18 | Anterior Chamber Depth and Chamber Angle and Their Associations with Ocular and General Parameters: The Beijing Eye Study显示文摘 | Liang Xu Wei Fang Cao Ya Xing Wang Chang Xi Chen Jost B. Jonas | 2008 | American Journal of Ophthalmology2008，，5： | 1 |
| 19 | Investigation of the Hot-Stamping Process for Advanced High-Strength Steel Sheet by Numerical Simulation显示文摘 | H. S. Liu Z. W. Xing J. Bao B. Y. Song | 2010 | Journal of Materials Engineering and Performance2010，，3： | 1 |
| 20 | Genetic bases of appearance quality of rice grains in Shanyou 63, an elite rice hybrid显示文摘 | Y. F. Tan Y. Z. Xing J. X. Li S. B. Yu C. G. Xu Qifa Zhang | 2000 | TAG Theoretical and Applied Genetics (-)2000，，5： | 1 |
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