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Search Results: 1 - 10 of 34521 matches for " Zhou Xiaoqi "
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Long-Term Exclusion of Grazing Increases Soil Microbial Biomass but Not Diversity in a Temperate Grassland  [PDF]
Xiaoqi Zhou, Chengrong Chen, Yanfen Wang
Open Journal of Soil Science (OJSS) , 2012, DOI: 10.4236/ojss.2012.24043
Abstract:

Restoration of grassland such as exclusion of grazing has been considered to increase aboveground plant diversity and soil fertility. However, knowledge on the effect of long-term exclusion of grazing on soil bacterial community structure and diversity is not well understood. The two sites were selected in the Inner Mongolian grassland, i.e., one fenced off since 1979 (UG79) and the other continually grazed by sheep (FG) all along. Soil microbial biomass was measured using fumigation method and bacterial community structure and diversity were assessed using methods of Denaturing Gradient Gel Electrophoresis (DGGE) and clone library. Results showed that the UG79 soil had significantly higher microbial biomass carbon and nitrogen compared with the FG soil. There was a clear separation in soil bacterial community structure, but not in bacterial diversity between the two sites. Moreover, 55 clones from the UG79 soil and 56 clones from the FG soil were selected and sequenced. Phylogenetic analysis of all clone sequences indicated that bacterial communities were dominated by the groups of Actinomycetes, Proteobacteria and Bacteroidetes, but there were no significant differences in bacterial diversity between the two sites, consistent with the results obtained from DGGE. The results highlighted that although long-term exclusion of grazing increased soil microbial biomass, but it did not harbor higher bacterial diversity compared with freely grazed site.

A Novel Protection and Utilization Pattern for Urban Wetland—As an Example of Hemu Wetland in Hangzhou, China  [PDF]
Nongnong Shi, Minger Ye, Tongfei Lai, Zhiming Yu, Yunli Pan, Mengying Yu, Xiaoqi Zhou
Journal of Water Resource and Protection (JWARP) , 2015, DOI: 10.4236/jwarp.2015.74024
Abstract: This paper proposes an innovative plan and its implement strategy of Hemu urban wetland. The plan takes into consideration its historical background and current status, its protection significance, strategies, solutions and support conditions. It highlights the landscape characteristics of rivers and lakes, and restores its historical flood prevention functions and climate regulation for the city. Especially, this paper proposes to achieve the restoration of “Mulberry-sided Fish Pond” farming style—an important agricultural heritage created by the ancestors inside the wetland, which is a unique and creative way to use low land for ecological agriculture and cycling economy. The proposed wetland sewage treatment schemes would be of practical importance to improve and enhance the ecological environment and promote the construction of ecological civilization in the region. The “Two zones—One block and Three complexes” protection and utilization plan is reasonable and feasible. It fully presents the functions of the wetland for its production, living, life forms and ecology, and is characterized by joint protection of the wetland by original residents and social public. This will result in active, instead of passive, wetland protection, like turning a “blood transfusion protection” to “hematopoietic protection”, which reflects the sustainable development. The paper offers valuable information and strategies for planning and development of urban wetland.
Comparison of Higher Education Funding Systems between China and the United States  [PDF]
Xiaoqi Hu
Open Journal of Social Sciences (JSS) , 2019, DOI: 10.4236/jss.2019.74013
Abstract: In 2016, China’s statistical bulletin on the development of education announced that the total amount of various types of higher education in China reached 36.99 million, and the gross enrollment rate of higher education reached 42.7%. China is in a critical period from the popularization of higher education to the diffusion of higher education, and China’s higher education has been developing rapidly. However, the problem of educational equity has been restricting the development of higher education in China. Poor students, in particular, are deeply affected by the problem. In order to help these students, it is an important way to establish and improve the higher education funding system. This paper first expounds the specific forms of the higher education funding system in China and the United States, then finds out the defects of the higher education funding system in China through the comparison between China and the United States, and tries to put forward some suggestions to better improve this shortcoming.
Methane production in relation with temperature, substrate and soil depth in Zoige wetlands on Tibetan Plateau

Jianqing Tian,Huai Chen,Yanfen Wang,Xiaoqi Zhou,

生态学报 , 2011,
Abstract:
Warming Rather Than Increased Precipitation Increases Soil Recalcitrant Organic Carbon in a Semiarid Grassland after 6 Years of Treatments
Xiaoqi Zhou, Chengrong Chen, Yanfen Wang, Simeon Smaill, Peter Clinton
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0053761
Abstract: Improved understanding of changes in soil recalcitrant organic carbon (C) in response to global warming is critical for predicting changes in soil organic C (SOC) storage. Here, we took advantage of a long-term field experiment with increased temperature and precipitation to investigate the effects of warming, increased precipitation and their interactions on SOC fraction in a semiarid Inner Mongolian grassland of northern China since April 2005. We quantified labile SOC, recalcitrant SOC and stable SOC at 0–10 and 10–20 cm depths. Results showed that neither warming nor increased precipitation affected total SOC and stable SOC at either depth. Increased precipitation significantly increased labile SOC at the 0–10 cm depth. Warming decreased labile SOC (P = 0.038) and marginally but significantly increased recalcitrant SOC at the 10–20 cm depth (P = 0.082). In addition, there were significant interactive effects of warming and increased precipitation on labile SOC and recalcitrant SOC at the 0–10 cm depth (both P<0.05), indicating that that results from single factor experiments should be treated with caution because of multi-factor interactions. Given that the absolute increase of SOC in the recalcitrant SOC pool was much greater than the decrease in labile SOC, and that the mean residence time of recalcitrant SOC is much greater, our results suggest that soil C storage at 10–20 cm depth may increase with increasing temperature in this semiarid grassland.
In-Sourcing or Outsourcing: An Economic Analysis on Internal and External Alternatives for Enterprise R&D  [PDF]
Xiaoqi Rao, Ming Dai
American Journal of Industrial and Business Management (AJIBM) , 2016, DOI: 10.4236/ajibm.2016.66073
Abstract: This article will use the theories of comparative advantages, transaction costs, cost minimization or profit maximization, conducting a deep analysis of the internal and external alternatives for enterprise R&D with respect to in-sourcing or outsourcing by modeling from the point of view of microeconomics, according to the enterprises’ own R&D relative advantages and disadvantages, the scale of the transaction costs of product development. Based on that, this paper makes corresponding countermeasures and suggestions, in order to provide certain theoretical references for the internal and external alternatives for enterprise R&D.
Increased Hypothalamic Inflammation Associated with the Susceptibility to Obesity in Rats Exposed to High-Fat Diet
Xiaoke Wang,Aiguo Ge,Mengjie Cheng,Fangfang Guo,Min Zhao,Xiaoqi Zhou,Liegang Liu,Nianhong Yang
Experimental Diabetes Research , 2012, DOI: 10.1155/2012/847246
Abstract: Inflammation has been implicated in the hypothalamic leptin and insulin resistance resulting defective food intake during high fat diet period. To investigate hypothalamic inflammation in dietary induced obesity (DIO) and obesity resistant (DIO-R) rats, we established rat models of DIO and DIO-R by feeding high fat diet for 10 weeks. Then we switched half of DIO and DIO-R rats to chow food and the other half to high fat diet for the following 8 weeks to explore hypothalamic inflammation response to the low fat diet intervention. Body weight, caloric intake, HOMA-IR, as well as the mRNA expression of hypothalamic TLR4, NF-κB, TNF-α, IL-1β, and IL-6 in DIO/HF rats were significantly increased compared to DIO-R/HF and CF rats, whereas IL-10 mRNA expression was lower in both DIO/HF and DIO-R/HF rats compared with CF rats. Switching to chow food from high fat diet reduced the body weight and improved insulin sensitivity but not affecting the expressions of studied inflammatory genes in DIO rats. Take together, upregulated hypothalamic inflammation may contribute to the overeating and development of obesity susceptibility induced by high fat diet. Switching to chow food had limited role in correcting hypothalamic inflammation in DIO rats during the intervention period.
An Ensemble Classifier for Eukaryotic Protein Subcellular Location Prediction Using Gene Ontology Categories and Amino Acid Hydrophobicity
Liqi Li, Yuan Zhang, Lingyun Zou, Changqing Li, Bo Yu, Xiaoqi Zheng, Yue Zhou
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0031057
Abstract: With the rapid increase of protein sequences in the post-genomic age, it is challenging to develop accurate and automated methods for reliably and quickly predicting their subcellular localizations. Till now, many efforts have been tried, but most of which used only a single algorithm. In this paper, we proposed an ensemble classifier of KNN (k-nearest neighbor) and SVM (support vector machine) algorithms to predict the subcellular localization of eukaryotic proteins based on a voting system. The overall prediction accuracies by the one-versus-one strategy are 78.17%, 89.94% and 75.55% for three benchmark datasets of eukaryotic proteins. The improved prediction accuracies reveal that GO annotations and hydrophobicity of amino acids help to predict subcellular locations of eukaryotic proteins.
Rapeseed oil fortified with micronutrients reduces atherosclerosis risk factors in rats fed a high-fat diet
Jiqu Xu, Xiaoqi Zhou, Qianchun Deng, Qingde Huang, Jin'e Yang, Fenghong Huang
Lipids in Health and Disease , 2011, DOI: 10.1186/1476-511x-10-96
Abstract: The rodent diet contained 20% fat whose source was refined rapeseed oil (RRO) or fortified refined rapeseed oil with low, middle and high quantities of these micronutrients (L-, M- and H-FRRO). Forty male SD rats were divided into four groups. One group received RRO diet and other groups received L-, M- and H-FRRO diet for 10 weeks.Micronutrients supplementation significantly increased plasma antioxidant defense capacities, as evaluated by the significant elevation in the activities of GPx, CAT and SOD as well as the level of GSH, and the significant decline in lipid peroxidation. These micronutrients also reduced the plasma contents of TG, TC and LDL-C and increased the ratio of HDL-C/LDL-C. In addition, in parallel with the enhancement of these micronutrients, plasma levels of IL-6 and CRP declined remarkably.Rapeseed oil fortified with micronutrients polyphenols, tocopherols and phytosterols may contribute to prevent atherogenesis by ameliorating plasma oxidative stress, lipid profile and inflammation.Cardiovascular disease (CVD) is the largest cause of premature death in most developed and developing countries and it is also an increasingly important source of disability and contributes in large part to the escalating costs of health care. Atherosclerosis is the most common pathologic process underlying CVD. It is clear that several risk factors such as oxidant stress [1], lipid abnormalities [2] as well as chronic inflammation [3] have been correlated to both the initiation and the progression of atherosclerosis and subsequent CVD.Rapeseed oil is one of the major and cheapest vegetable oils for human diet in china and many other countries. This kind of plant oil has the lowest concentration of saturated fatty acids in all commonly consumed oils and high level of monounsaturated fatty acids [4]. In addition, it is also the major source of linoleic acid and α-linolenic acid, and it is, so far, the closest to the optimum to meet the basic requirements of essential
PCR-DGGE detection of the bacterial community structure in the Inner Mongolia steppe with two different DNA extraction methods

Zhou Xiaoqi,Wang Yanfen,Cai Ying,Huang Xiangzhong,Hao Yanbin,Tian Jianqing,Chai Tuanyao,

生态学报 , 2007,
Abstract:
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