oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 3 )

2018 ( 142 )

2017 ( 173 )

2016 ( 170 )

Custom range...

Search Results: 1 - 10 of 14699 matches for " Xingling Tao "
All listed articles are free for downloading (OA Articles)
Page 1 /14699
Display every page Item
Bioremediation of Refinery Oil Contaminated Soil  [PDF]
Xingling Tao, Li-An Ma
Open Access Library Journal (OALib Journal) , 2018, DOI: 10.4236/oalib.1104624
Abstract:
Objective: In order to study low activity of petroleum-degrading strains. Methods: We added oil degrading strains to compost, the compost is made of soybean meal, corn flour, bran and sawdust, in the last, we added the oil degrading strains-compost contaminated soil. Result: The oil removal rates were determinated by gravimetric method. The oil removal rates of control group, oil contaminated soil compost group and oil contaminated soil oil degrading strains-compost group were 23.4%, 31.6% and 49.7% on 60th day, respectively. Compared with the control group, the oil removal rate of oil contaminated soil oil degrading strains-compost group increased by 26.3%. Conclusion: The research indicates that oil contaminated soil oil degrading strains-compost can improve petroleum-degrading rates.
Bioremediation of Oil Contaminated Soil  [PDF]
Yabin Zhan, Xingling Tao, Li-An Ma, Tao Jiang
Open Access Library Journal (OALib Journal) , 2018, DOI: 10.4236/oalib.1104305
Abstract:
Objective: In order to study the microbial remediation of oil contaminated soil. Methods: The method of soil composting was adopted. G-40, G-94 and G-40 G-94 were added into the soil with 2% oil, adding 20% bran and adding distilled water to keep the soil water content in 35%, and it was incubated at 35℃. After sampled, the alkali hydrolysable nitrogen, available phosphorus and oil content were measured. Result: The oil removal rates of G-40, G-94 and G-40 G-94 treatment groups were 29.08%, 31.09% and 32.68% on 100th day, respectively. Conclusion: This study provides a reference for microbial remediation of petroleum contaminated soil.
Identification of Petroleum Degrading Bacteria and Construction of Petroleum Degrading Agent  [PDF]
Xingling Tao, Yabin Zhan, Tao Jiang, Chuanjiong Hu
Open Access Library Journal (OALib Journal) , 2019, DOI: 10.4236/oalib.1105335
Abstract:
The aim of this study is to construct petroleum degrading agent (PDA) which can effectively degrade oil. By enrichment, domestication, and separation of culture from the soil sample of Qianjiang Guanghua Oilfield, the pure culture of three petroleum degrading bacteria G-40, G-53, and G-94 was identified from the medium supplemented with oil, which served as the sole source of carbon. The species of G-40 and G-53 were preliminarily identified and classified by morphological observation, physiological and biochemical determination, and sequence analyses of 16S rDNA. The species of G-94 was preliminarily identified and classified by morphological observation, physiological and biochemical determination, and sequence analyses of ITS rDNA. The optimal inoculation proportion of these three bacteria strains and bran proportion in composition of PDA were determined through orthogonal test. G-40, G-53, and G-94 were isolated and identified as Brevibacillus laterosporus, Tsukamurella inchonensis, and Candida tropicalis, respectively. To construct petroleum degrading agent, the optimum inoculation proportion of the three bacteria strains was A1B3C3 (G-40:G-53:G-94 = 1:4:4); and the optimum proportion of bran was D1E1F2 (soybean meal:corn flour:bran = 1:1:2). The oil removal rate of the constructed petroleum degrading agent reached to 42.32% on day 10 under the optimal proportion of bacteria inoculation and bran composition. Petroleum degrading bacteria can effectively degrade petroleum for its own growth. This study identified three petroleum degrading bacteria strains and proposed a petroleum degrading agent by studying the optimal inoculation proportion of the three bacterial strains and the accompanying bran. Our research could provide potential microbial resources for bioremediation of petroleum-contaminated soil.
Isolation, Identification and Degradation Characteristics of Oil Degrading Bacterial Strain  [PDF]
Yabin Zhan, Xingling Tao, Shanwen He, Shufen Song, Jingjing Xing, Fangmin Li, Tao Jiang, Lian Ma
Open Access Library Journal (OALib Journal) , 2017, DOI: 10.4236/oalib.1104016
Abstract:
Objective: The aim of study is to obtain a strain which can effectively degrade oil. Methods: By enrichment, domestication and separation of culture from the sample which comes from Qianjiang Guanghua Oilfield, the pure culture (G-40) was selected from the medium supplemented with oil as the sole source of carbon. The G-40 was preliminarily identified and classified by morphological observation, physiological and biochemical determination and sequence analyses of 16S rDNA. Effects of temperature, pH, oil concentration, salt concentration, inoculation amount, N and P source on the degradation of the oil were studied by single factor test. Meanwhile, the effects of temperature, pH, oil concentration and salt concentration were optimized by orthogonal design. Result: G-40 was isolated and identified as Brevibacillus laterosporus. The orthogonal design showed that the degradation rate of oil could reach 20.81%, 24.34% and 31.15% at 10 d, 20 d and 40 d under the optimal conditions which was 35℃, initial pH 7.3, oil concentration 0.6%, salt concentration 0.5%, inoculum amount 8%, the optimal N and P was (NH4)2SO4 and K2HPO4. Conclusion: This study provides microbial resources for bioremediation of petroleum contaminated soil.
On Uniqueness Theorem of a Vector Function
Xingling Zhou
PIER , 2006, DOI: 10.2528/PIER06081202
Abstract: Based on a generalized Helmholtz's identity, definitions of an irrotational vector and a solenoidal vector are reviewed, and new definitions are presented. It is pointed out that the well-known uniqueness theorem of a vector function is incomplete. Although the divergence and curl are specified, for problems with finite boundary surfaces, normal components are not sufficient for uniquely determininga vector function. A complete uniqueness theorem and its two corollaries are then presented. It is proven that a vector function can be uniquely determined by specifyingits divergence and curl in the problem region, its value (both normal and tangential components) on the boundary.
On Independence, Completeness of Maxwell's Equations and Uniqueness Theorems in Electromagnetics
Xingling Zhou
PIER , 2006, DOI: 10.2528/PIER06061302
Abstract: In this paper, the independence, completeness of Maxwell's equations and uniqueness theorems in electromagnetics are reviewed. It is shown that the four Maxwell's equations are independent and complete. A complete uniqueness theorem is proposed and proven for the first time by pointing out logic mistakes in the existing proof and presenting a truth table. Therefore, electrostatics and magnetostatics can be reduced from dynamical electromagnetics in all aspects including not only the equations as subsets of Maxwell's equations but also the corresponding uniqueness theorems. It is concluded that the axiomatic system of electromagnetic theory must consist of all four Maxwell's equations.
Application of Physical Spline Finite Element Method (PSFEM) to Fullwave Analysis of Waveguides
Xingling Zhou;George W. Pan
PIER , 2006, DOI: 10.2528/PIER05081102
Abstract: In this paper, the physical spline finite element method (PSFEM) is applied to the fullwave analysis of inhomogeneous waveguides. Combining (rectangular) edge element and the PSFEM, the cubic spline interpolation is successfully applied to the wave equation. For waveguide problems, the resulting nonlinear eigenvalue problem is solved by a simple iteration method in which the initial estimate is taken as the linear Lagrange interpolation, and then the solutions are improved by a few iterations. The bandwidth of the resultant matrix from the PSFEM is the same as that of linear Lagrange interpolation and is sparse. As a result, sparse matrix solver can be used. Three typical examples are demonstrated and compared with the analytical solutions and with the linear Lagrange interpolation results. It is observed that the present method converges much faster than the Lagrange interpolation method.
Some Advances in Evidences of Quaternary Aeolian Environment
第四纪风沙环境证据的研究进展

LU Ruijie,HA Si,YUE Xingling,CHEN Yuan,
鲁瑞洁
,哈斯,岳兴玲,陈原

地理科学进展 , 2004,
Abstract: The research of Quaternary Aeolian environment has great significance to understand the momentous climatic changes. As the time series of instrumental observation data is too short to reconstruct the past environmental variables, the reliable proxies have been widely applied to the Quaternary Aeolian environment research. Based on the analysis of the proxies and extracting the valuable information and evidences about the climatic variables, the long time series of past environmental changes can be reconstructed. This paper formulates the evidences (morphological evidences, sedimentological evidences and biogeomorphical evidences) used in the Quaternary Aeolian environment research, presents the problems existed in using the evidences, analyzes the tendency of the future research, and points out that the synthetic using of proxies and improving the precision of dating are still the emphases.
Distorted Factor Markets, Government Intervention, and Excess Capital Accumulation: The Case of China  [PDF]
Tao Gu
Theoretical Economics Letters (TEL) , 2014, DOI: 10.4236/tel.2014.49102
Abstract: This paper develops a simple growth model that embeds distorted factor markets and government intervention that achieves high economic growth, low consumption, and high investment simultaneously. All of these phenomena are consistent with Chinese macroeconomic data since the 1990s, implying the inefficiency of economic growth.
Self-Consistent Sources and Conservation Laws for Super Tu Equation Hierarchy  [PDF]
Sixing Tao
Journal of Applied Mathematics and Physics (JAMP) , 2015, DOI: 10.4236/jamp.2015.34054
Abstract:

Based upon the basis of Lie super algebra B(0,1), the super Tu equation hierarchy with self-con- sistent sources was presented. Furthermore, the infinite conservation laws of above hierarchy were given.

Page 1 /14699
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.