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Search Results: 1 - 10 of 8313 matches for " Kaoqi;Kang "
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Characterization of poly (safranine T)-modified electrode and application for simultaneous determination of epinephrine and uric acid coexisting with ascorbic acid
Niu, Lingmei;Lian, Kaoqi;Kang, Weijun;Li, Shan;
Journal of the Brazilian Chemical Society , 2011, DOI: 10.1590/S0103-50532011000200003
Abstract: a poly(safranine t) modified glassy carbon electrode was used for the simultaneous determination of epinephrine (ep) and uric acid (ua) in the presence of ascorbic acid (aa). enhanced electrocatalytic currents and well-separated potentials for ep and ua were observed. the anodic peak currents of ep and ua were linear to the corresponding concentrations in the range of 6.0×10-6-1.0×10-4 mol l-1. in addition, the modified electrode showed good sensitivity and stability. satisfactory results were achieved for the determination of ep and ua in injection solutions of ep and in human urine samples.
Reduction of n-3 PUFAs, specifically DHA and EPA, and enhancement of peroxisomal beta-oxidation in type 2 diabetic rat heart
Lianguo Hou, Kaoqi Lian, Min Yao, Yun Shi, Xin Lu, Lijia Fang, Tianbo He, Lingling Jiang
Cardiovascular Diabetology , 2012, DOI: 10.1186/1475-2840-11-126
Abstract: The capillary gas chromatography results showed that all the n-3 (or omega-3) PUFAs, especially DHA (~50%) and EPA (~100%), were significantly decreased, and the n-6/n-3 ratio (~115%) was significantly increased in the hearts of diabetic rats. The activity of peroxisomal beta-oxidation, which is crucial to very-long-chain and unsaturated FA metabolism (including DHA), was significantly elevated in DM hearts. Additionally, the real-time PCR results showed that the mRNA expression of most peroxisomal beta-oxidation key enzymes were up-regulated in T2DM rat hearts, which might contribute to the reduction of n-3 (or omega-3) PUFAs.In conclusion, our results indicate that T2DM hearts consume more n-3 PUFAs, especially DHA and EPA, due to exaggerated peroxisomal beta-oxidation.Type 2 diabetes mellitus (T2DM) is associated with high cardiovascular morbidity and mortality [1]. In patients with diabetes, the fatty acid (FA) supply to the heart increases to compensate for the diminished utilization of glucose as an energy source. Although the dramatic increase in FA influx markedly increases the fatty acid oxidation (FAO) [2], it also leads to elevated FA and subsequent triglyceride (TG) synthesis in the diabetic heart, causing cellular lipotoxicity and the initiation of cardiac dysfunction [3]. Alternatively, the diabetic heart is characterized by significant alterations in the fatty acid composition of heart membranes. It has been shown that the linoleic acid (C18:2n-6) content is increased [4] and the n-3 polyunsaturated fatty acid (PUFA) content is decreased [5] in the cardiac phospholipids of STZ-treated rats and fructose-fed rats.Fatty acids are degraded by both mitochondrial and peroxisomal β-oxidation. The fatty acids that are shorter than C20 are primarily oxidized in the mitochondria, and the fatty acids that are greater than C22 (very-long-chain fatty acids, VLCFA), including polyunsaturated fatty acids (PUFA, Polyenoic acids with 20–22 carbon atoms and 3–6 double
Mesoscopic relaxation time of dynamic image correlation spectroscopy  [PDF]
Kyongok Kang
Journal of Biomedical Science and Engineering (JBiSE) , 2010, DOI: 10.4236/jbise.2010.36085
Abstract: Dynamical images contain useful information of how the objects behave in time and space. When the system is in biological fluids, the motion of the object is much over-damped; the relaxation time is the characteristics in a diffusive time scale. We have found dynamical states of melting and forming of small nematic domains (10—30 μm) that are exhibited in the suspensions of fd-viruses under applied AC electric field amplitude at low frequency. Dynamic image correlation function is used for extracting the mes- oscopic relaxation times of the dynamical states, which can be employed as an application to other dynamic imaging process of biologically relevant soft condensed matter and biomedical systems.
Development and Application of Real-time Bridge Scour Monitoring System  [PDF]
Joongu Kang
Engineering (ENG) , 2011, DOI: 10.4236/eng.2011.310121
Abstract: Because of the complex nature of the changes in the current and movement of the riverbeds by bridge scouring, it is impossible to understand or predict these changes. In order to have a reliable data, it is critical to have the current methods and equipment for measuring bridge scouring replaced with technology that could acquire real-time bridge scouring data. Despite the critical need for real-time data acquisition, the harsh environmental conditions have prevented the scientific community from acquiring real-time data. Harsh environmental conditions were addressed by the developmental of an automated, remote data collection system, allowing real-time data such as scour movement, scour depth, and scour trend to be viewed in a safe location. As a result, accurate sea-floor movements were seen for the first time, aiding the direction and future of bridge scour research, ultimately contributing greatly to the safety of bridges.
SWCF of Forest in Three-Gorges of Yangtze River  [PDF]
Kang Chen
Journal of Geoscience and Environment Protection (GEP) , 2014, DOI: 10.4236/gep.2014.21003

In Qinjiagou watershed of Three-Gorge of Yangtze River, 18 indices were selected from canopy layer, litter layer, soil layer and topography to evaluate the soil and water conservation capacities of four common plantation types by ideal point method. Results indicated that the broadleaf plantation of robur (Lithocrpus glabra) and Chinese gugertree (Schima superba) (LS) has the biggest soil and water conservation capacity. The rank of three other plantation types from big to small is the mixed broadleaf plantation of sweetgum (Liguidambar formosana), Chinese gugertree and camphor tree (Cinnamomum camphora) (LSC), the mixed broadleaf-conifer plantation of Chinese fir (Cunninghamia lanceolata), Masson pine (Pinus massoniana) and Chinese gugertree (CPS), and the mixed Pine plantation of Chinese fir and Masson pine (CP). Under the same climate and topographical condition, the broadleaf plantation has better soil and water conservation capacity than the conifer plantation. Sensitivity analysis showed that the three most sensitive indices are soil non-capillary porosity, soil aggregation, and soil initial infiltration rate. The litter amount and soil properties are the most important indicators of soil and water conservation capacity of plantations. Therefore, suitable measurements such as deep tillage should be taken to improve the properties of soil under different plantations.

Charged Colloidal Rods Out of Equilibrium  [PDF]
Kyongok Kang
Advances in Chemical Engineering and Science (ACES) , 2015, DOI: 10.4236/aces.2015.51003
Abstract: This article is a comprehensive overview of the ongoing research of the author on charged colloidal rods out of equilibrium, under external electric fields and at high concentrations around the glass transition. The suspensions of fd-virus particles are used as a model system for charged colloidal rods, which exhibit several disorder-order (and liquid-crystalline) phase transitions. When a low AC electric field is applied to suspensions in isotropic-nematic coexistence concentration, with frequencies that are sufficiently low to polarize the electric double layer and the layer of condensed ions, various phases/states are induced: a chiral nematic, a dynamical state where nematic domains persistently melt and form, and a uniform homeotropic phase. A point in the field-amplitude versus frequency diagram, where various transitions lines meet, can be identified as a non-equilibrium critical point. Without an electric field, at high concentrations of charged fd-rods, various self-assembled orientation textures are found beyond the isotropic-nematic coexistence regions, and a glass transition is observed on approach and within the glass state that are probed. The presented system exhibits transient behaviors of repulsive glasses and slow dynamics out of equilibrium.
On the Implementation of Exponential B-Splines by Poisson Summation Formula  [PDF]
Sinuk Kang
Journal of Applied Mathematics and Physics (JAMP) , 2016, DOI: 10.4236/jamp.2016.44072

Polynomial splines have played an important role in image processing, medical imaging and wavelet theory. Exponential splines which are of more general concept have been recently investigated.We focus on cardinal exponential splines and develop a method to implement the exponential B-splines which form a Riesz basis of the space of cardinal exponential splines with finite energy.

Will Chinese System of Fiscal Decentralization Inhibit the Environmental Investment?  [PDF]
Dahua Kang
American Journal of Industrial and Business Management (AJIBM) , 2016, DOI: 10.4236/ajibm.2016.64040
Abstract: This paper mainly investigated the effect of Chinese system of fiscal decentralization on the environmental investment. Being different from the previous studies that believed fiscal decentralization would inhibit the environmental investment, this paper believed that the fiscal decentralization both had a substitution effect and an income effect on the environmental investment, there was a U-type relationship between the both. Thus, a fiscal system reform has to be done, and more than anything else, the transfer payment from the exchequer to the less developed areas needs to be enhanced to solve the environmental issue of the less developed areas.
Evidence-Based Practice and Job Satisfaction of Nurses in Long-Term Care  [PDF]
Hyunwook Kang
Open Journal of Nursing (OJN) , 2016, DOI: 10.4236/ojn.2016.612094
Abstract: Purpose: The purpose of this study was to identify the relationship between evidence-based practice (EBP) and job satisfaction among nurses working in long-term care facilities. Methods: The study used a descriptive cross-sectional design. A total of 146 nurses working in 6 long-term care facilities in South Korea self-reported their perception of EBP implementation, barriers to research utilization, and job satisfaction. Results: The level of job satisfaction was higher in nurses who were single, older, more experienced, and had a higher income. Lower perceived barriers to research utilization were associated with greater job satisfaction. However, there was no significant relationship between a level of EBP implementation and job satisfaction. Factors influencing job satisfaction included lower barriers to the organization and communication domains of research utilization, being unmarried and older. Conclusion: Decreasing barriers to research utilization may improve the job satisfaction of nurses working in long-term care facilities.
Revenue Optimization of Pipelines Construction and Operation Management Based on Quantum Genetic Algorithm and Simulated Annealing Algorithm  [PDF]
Kang Tan
Journal of Applied Mathematics and Physics (JAMP) , 2018, DOI: 10.4236/jamp.2018.66102
Abstract: For the optimization of pipelines, most researchers are mainly concerned with designing the most reasonable section to meet the requirements of strength and stiffness, and at the same time reduce the cost as much as possible. It is undeniable that they do achieve this goal by using the lowest cost in design phase to achieve maximum benefits. However, for pipelines, the cost and incomes of operation management are far greater than those in design phase. Therefore, the novelty of this paper is to propose an optimization model that considers the costs and incomes of the construction and operation phases, and combines them into one model. By comparing three optimization algorithms (genetic algorithm, quantum genetic algorithm and simulated annealing algorithm), the same optimization problem is solved. Then the most suitable algorithm is selected and the optimal solution is obtained, which provides reference for construction and operation management during the whole life cycle of pipelines.
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