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Search Results: 1 - 10 of 104027 matches for " ZHANG Caiyun "
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A First Comparison of Simultaneous Sea Level Measurements from Envisat, GFO, Jason-1, and TOPEX/Poseidon
Caiyun Zhang,Ge Chen
Sensors , 2006, DOI: 10.3390/s6030235
Abstract: The multiple altimeter missions have not only advanced our knowledge of oceancirculation, ice sheet topography, and global climate, but also improved the accuracy ofaltimetric measurements by cross-calibration and validation. In this paper, one year’ssimultaneous maps of sea level anomaly (MSLA) data obtained from four altimeters,Envisat, Geosat Follow-On (GFO), Jason-1, and TOPEX/Poseidon (T/P), have beencompiled for a preliminary comparison. First, the discrepancy in global geographicaldistribution of each product relative to the merged MSLA field is analyzed and its signalretrieval capability is discussed. Second, the space/time variability of each discrepancy inthe Atlantic Ocean, Indian Ocean, Pacific Ocean, Northern Hemisphere, SouthernHemisphere, and global ocean is studied. Third, each discrepancy as a function of latitude,longitude, and merged MSLA is presented. The results show that Jason-1 is the best single-mission for mapping large scale sea level variation, while T/P in its new orbit presents thepoorest estimation of SLA due to the short period (from cycle 369 to 403) used to determinethe mean profile. A clear understanding of each product discrepancy is necessary for ameaningful combination or merging of multi-altimeter data, optimal product selection, aswell as for their assimilation into numerical models.
A Study of Collision and Fusion of Eastern and Western People-oriented Management Philosophy
Guiling Wei,Caiyun Zhang
Asian Social Science , 2011, DOI: 10.5539/ass.v7n12p239
Abstract: Eastern people-oriented management philosophy, traditional Chinese management culture as its core, emphasizes on culture and ethical guidance. Before the 17th century, this kind of management thinking has brought tremendous economic, social, cultural and other aspects prosperity to the East. However, in modern times, as a result of decline of the east and rapid rise of the west, management theory has been rooted in western management ideology. The 21st century, is a new stage of management theory development, which witnesses world’s continuous economic development, increasingly regional cooperation, and all these contribute to the unprecedented collision and fusion of eastern and western “people-oriented” management philosophy. The main orientation of future management development should be oriental management culture as its core, and absorb scientific achievements of western management culture, in order to enrich the treasure trove of management philosophy so as to promote the great fusion of eastern and western management cultures.
Determination of Tramadol in Human Serum by Capillary Electrophoresis with the End-Column Electrochemiluminescence Detection  [PDF]
Caiyun Zhang, Tao Liu, Xiaoli Zhang, Erbao Liu
Open Journal of Biophysics (OJBIPHY) , 2013, DOI: 10.4236/ojbiphy.2013.32015

A capillary electrophoresis (CE) coupled with end-column electrochemiluminescence (ECL) detection method for the analysis of tramadol (TMD) has been investigated. ECL detection was working electrode biased at 1.2 V in a 20mmol·L-1 sodium phosphate buffer (pH = 8.0) containing 5 mmol·L-1 Ru \"\"(where bpy = 2,2-bipyridyl). Linear correlation (r 0.997) between ECL intensity and drug concentration was obtained in the range 3 × 10-4 - 6 × 10-6 mol·L-1. The limits of detection (LODs) for tramadol in water was 3.012 × 10-8 mol·L-1(S/N = 3). The relative standard deviation values on peak size (10-5 mol·L-1 level) and migration time for the tramadol were 4.58% and 1.39% (n = 10), respectively. Applicability of the CE-ECL method to the analysis of human serum spiked with tramadol was examined

99mTc complex conjugated to insulin: CNS radio-pharmaceuticals design based on principles of blood-brain barrier transport vector
Fei Liu,Caiyun Fan,Jinming Zhang,Wushang Wang,Boli Liu
Chinese Science Bulletin , 2005, DOI: 10.1007/BF03183738
Abstract: Hydrophilic99mTc-EC and nonlipophilic99mTc-MAMA′-BA complexes, owing to the existing of intact blood-brain barrier (BBB)in vivo, cannot cross from blood to brain. Previous studies showed that insulin is selectively transported by receptor-mediated transcytosis through the brain capillary endothelial wall that makes up the BBB. In this paper, based on the characteristic of the insulin receptor enriched in brain capillary, the complexes of hydrophilic99mTc-EC and nonlipophilic99mTc-MAMA′-BA are conjugated to insulin respectively. After purification, the radio-chemical purity of99mTc-EC-insulin and99mTc-MAMA′-BA-insulin was > 90% and the stabilityin vitro was good. Expectation for the special formulation can be internalized and endocytosed into the capillary membrane by the vector-mediated brain delivery system, and transported99mTc-labeled conjugate through the BBBin vivo, thus enhancing brain uptake in mice. The biodistribution results of99mTc-EC-insulin and99mTc-MAMA′-BA-insulin in mice indicated that the brain uptake was higher than99mTc-EC and99mTc-MAMA′-BAto some extent. The ratios of brain uptake of99mTc-EC-insulin to99mTc-EC,99mTc-MAMA′-BA-insulin to99mTc-MAMA′-BA were 4–6 at 2 and 3 h post-injection respectively. In conclusion, the given results have illustrated a new way of brain uptake enhancing for nonlipophilic like complexes that have BBB delivery problems. It has a potential value for the ongoing development of99mTc-labeled radiopharmaceuticals for CNS receptors imaging.
Genes Responsive to Elevated CO2 Concentrations in Triploid White Poplar and Integrated Gene Network Analysis
Juanjuan Liu, Jianguo Zhang, Caiyun He, Aiguo Duan
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0098300
Abstract: Background The atmospheric CO2 concentration increases every year. While the effects of elevated CO2 on plant growth, physiology and metabolism have been studied, there is now a pressing need to understand the molecular mechanisms of how plants will respond to future increases in CO2 concentration using genomic techniques. Principal Findings Gene expression in triploid white poplar ((Populus tomentosa ×P. bolleana) ×P. tomentosa) leaves was investigated using the Affymetrix poplar genome gene chip, after three months of growth in controlled environment chambers under three CO2 concentrations. Our physiological findings showed the growth, assessed as stem diameter, was significantly increased, and the net photosynthetic rate was decreased in elevated CO2 concentrations. The concentrations of four major endogenous hormones appeared to actively promote plant development. Leaf tissues under elevated CO2 concentrations had 5,127 genes with different expression patterns in comparison to leaves under the ambient CO2 concentration. Among these, 8 genes were finally selected for further investigation by using randomized variance model corrective ANOVA analysis, dynamic gene expression profiling, gene network construction, and quantitative real-time PCR validation. Among the 8 genes in the network, aldehyde dehydrogenase and pyruvate kinase were situated in the core and had interconnections with other genes. Conclusions Under elevated CO2 concentrations, 8 significantly changed key genes involved in metabolism and responding to stimulus of external environment were identified. These genes play crucial roles in the signal transduction network and show strong correlations with elevated CO2 exposure. This study provides several target genes, further investigation of which could provide an initial step for better understanding the molecular mechanisms of plant acclimation and evolution in future rising CO2 concentrations.
New Exploration on Chinese Enterprises Human Capital
Caiyun Jing
International Journal of Business and Management , 2009, DOI: 10.5539/ijbm.v4n2p58
Abstract: We can study how human resource turns into human capital and realizes its values as capital by analyzing the logical and economic relationship between human resource and human capital. Manpower means three meanings for enterprises: namely resource, manager, and management level. To transform human resource into human capital needs important conditions. The core is the investment in human capital and its effective management. To explore this issue profoundly is meaningful for enterprises’ business management in practice.
A Discussion on the Prominent Effect of the Re-development of Township Economy on the Construction of New Countryside
Caiyun Jing
Asian Social Science , 2009, DOI: 10.5539/ass.v4n4p17
Abstract: The construction of new socialist countryside provides historic re-development opportunity for the development of China’s township economy and the re-development of township economy will provide huge power for the construction of new countryside. Because of history and reality, the development of township economy is still confronted with many problems, such as the deficiency of the development of countryside economy, the faultiness of the fundamental management system of agriculture, the weakness of the development capacities of enterprises, and the outer environment desiderating improvement. The re-development of township economy shall emphasize system innovation and capacity promotion, where the government shall take initiative to push the system innovation and township enterprises shall endeavor to promote their capacities.
Probe into the Reform of Land System Viewing from “Limited Property House”
Caiyun Jing
Asian Social Science , 2009, DOI: 10.5539/ass.v5n1p43
Abstract: “Limited property house” has already appeared for a long period. In history, it derives from China’s early land policy. Today, it needs to be regulated in time. The core of “limited property house” is the definition, limitation, and transfer of residential lands in China’s rural land policy. The essence of “limited property house” is whether Chinese farmers have the ownership, right of disposition, and right of profitability of the residential lands. The emergence of “limited property house” is also a chance for China starting a new land system reform. How to reform, regulate, and manage China’s present land system and how to embody the “farmer, countryside, and agriculture” policy and the people’s livelihood policy by land system deserve to be studied and deepened further.
Identification of petroleum aromatic fraction by comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry
HuiTong Wang,Na Weng,ShuiChang Zhang,GuangYou Zhu,JianPing Chen,CaiYun Wei
Chinese Science Bulletin , 2010, DOI: 10.1007/s11434-010-3234-0
Abstract: Comprehensive two-dimensional gas chromatography coupled with time-of-flight mass spectrometry (GC×GC-TOFMS) is commercially available in the 1990s, with the characteristics of large peak capacity, high resolution, high sensitivity, etc. However, its application to the petroleum and geological analyses is just emerging in China and overseas. In this research, the analytical method for petroleum aromatic fraction using GC×GC-TOFMS is set up, via the choice of the column system and optimization of setting parameters, such as temperature programming, modulation time, hot pulse time, flow rate of carrier gas, data acquisition rate and data processing. The results indicate that different polar compounds of aromatic fraction distribute as bands on structured GC×GC chromatogram. Within each band, homologous compounds appear as a roof-tile structure based on the number of substituent residues. The aromatic compounds are identified and characterized according to the GC×GC chromatogram and mass spectra. According to the polarity and the number of rings, aromatic compounds are spatially present on one chromatogram, which directly reflects the distribution characteristics of complex compounds of aromatic hydrocarbons. In addition, quantitative analysis is favored as some overlapped peaks on traditional GC-MS chromatogram have been separated completely on GC×GC. Some heterocyclic atom aromatic compounds at trace level can be clearly identified using this method, for polarity differences from other interfered aromatic compounds. The development of this method and chromatogram recognition offer petroleum geologists a practical example for the application performance of GC×GC-TOFMS.
Remote sensing of algal blooms using a turbidity-free function for near-infrared and red signals
Yan Li,Shaoling Shang,Caiyun Zhang,Xiaoxin Ma,Liwei Huang,Jingyu Wu,Yindong Zeng
Chinese Science Bulletin , 2006, DOI: 10.1007/s11434-006-0464-2
Abstract: This article presents a method for real-time mapping of algal blooms in turbid coastal waters using the remote sensing reflectance of red band (Channel 1, 580–680 nm) and near-infrared band (Channel 2, 720–1100 nm) of the AVHRR sensor on the NOAA series satellites. A turbidity-free function for near-infrared and red signals, α 0 = (b b (1)/b b (2))(a (2)/a (1)) based on the first order b b/(a+b b) model deducing equation R rs (2)-1 = α 0 R rs (1)-1+g 1 (1-α 0), were selected as a chlorophyll-a related index for detecting algal blooms, and the algal blooms with chlorophyll-a concentration of 64–256 mg/L could be defined by window of 1.6 < α 0 < 5.2 and 0.01< R rs (2)/g < 0.2. Such turbidity-free two-band method is supported by both sea-truth data and remote sensing experiment for an algal blooms event on the near-shore water off the Minjiang estuary of southeastern China during early June of 2003. Comparisons of this algorithm with other published algorithms, one-band method (i.e. method of bright water) or two-band methods (i.e. method of ratio, method of NDVI, and method of subtracting) have suggested that the turbidity-free function method could be regarded as a standard algorithm in capabilities of AVHRR imagery or other high resolution but wide near-infrared and red band imagery for detecting algal blooms events in coastal waters.
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