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Bioinformatic Analysis of the Main Characteristics and Structure of the Gene Encoding CYP2E1 Protein
LIN Fei-Fan, HAN Ya-Li
Journal of Guangdong University of Technology. 2015, 32 (1): 16-19.
DOI: 10.3969/j.issn.1007-7162.2015.01.004
The nucleotide and amino acid sequences of CYP2E1 protein (GenBank accession number: NC000010.11 and NM000773.3) from human being have been analyzed and predicted by bioinformatics in the following aspects: physicochemical properties, hydrophilicity and hydrophobicity, the signal peptide, transmembrane topological structure, subcellular localization, protein secondary structure and tertiary structure, the enzyme active center structure, and the composition of homologous protein and phylogenetic relationship of human being and other 6 species. The results show that the CYP2E1 gene encodes a 493 amino acid polypeptides with the estimated relative molecular weight 172 386.6, the theoretical PI of 7.04 and the structural formula of C6778 H10986 N2074 O2429 S374 ;. It is also found that CYP2E1 is a transmembrane protein with hydrophobicity and relatively unstable. There are 6 β fold, 6 α-helix, 6 transmembrane regions and 32 angles in its secondary structure, and It's active center was composed of Asn202 residues, Ser298 residues, Phe205 residues and iron porphyrin ring. The distance of its heme and substrate catalytic sites is 0.3-0.6 nm .
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Structure and Infrared Radiation Property of Eu2+ Doped Sr2 CaMoO6
LAN Li-Cai , ZHAO Wei-Ren, ZHONG Jian-Ming, WANG Jian-Qing, YU Fa-Bo
Journal of Guangdong University of Technology. 2015, 32 (1): 20-23.
DOI: 10.3969/j.issn.1007-7162.2015.01.005
The Eu2+ doped Sr2 CaMoO6 powders with high emissivity were fabricated by the traditional solid state reaction at the temperature of 1 100 ℃. The X-ray powder diffraction (XRD), infrared transmittance spectra (IR), Raman spectra and Infrared emission properties were examined to study the structure and the infrared emission properties of the samples. Also the effects of the different amount of Eu2+ on the infrared emissivity were investigated. It was found that the XRD patterns, infrared transmittance spectra, Raman spectra and infrared emissivity would change according to the increase of the amount of Eu2+ ,and the Eu2+ ions replace the Sr2+ site in the structure. When the content of Eu2+ is about 5%, the powders reach the highest emissivity with 0.886 at the range of 3~5 μm , 0.936 at the range of 8~14 μm and 0.915 at 1~22 μm.
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Synthesis Mechanism and Properties of Gallium Substituted YAG:Ce Phosphors
LIANG Yun-Ling, ZHANG Wei, HU Zheng-Fa, FENG Zu-Yong, LIU Qian, LUO Jie
Journal of Guangdong University of Technology. 2015, 32 (1): 24-28.
DOI: 10.3969/j.issn.1007-7162.2015.01.006
A series of Gallium-substituted Cerium-doped yttrium aluminum garnet (YAGG:Ce) phosphors were produced by co-precipitation. The formation process and structure of the Ga3+ -substituted phosphor powders are characterized by TG, FTIR, XRD and XPS, and the impacts of Ga3+ concentration on the luminescence properties have been investigated. The results show that the blue shift occurs after Ga3+ replaces Al3+ in matrix, and the intensity of emission spectrum is affected by the concentration of Ga3+ .
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Statistical Analysis of Physical and Mechanical Indexes of Granite Residual Soil in Eastern Guangzhou
LIANG Shi-Hua, ZHOU Shi-Zong, ZHANG Lang, WANG Meng
Journal of Guangdong University of Technology. 2015, 32 (1): 29-33.
DOI: 10.3969/j.issn.1007-7162.2015.01.007
Granite residual soil, mostly sandy sticky clay, is widely distributed in Guangzhou, sharing many universals despite the different characteristics. This paper takes the granite residual soil in eastern Guangzhou as the research object, and obtains a large amount of data through field research, laboratory test and insitu soil test, carrying out the statistical analysis of many physical and mechanical indexes, such as unit weigh, water content, void ratio, plastic limit, liquid limit, plasticity index, liquidity index, coefficient of compressibility, modulus of compressibility, cohesion friction, angle of internal and standard penetration test blow count. Also the paper offers the statistics and the range of physical and mechanical index, analyzes the correction between various indicators, which provides a geological basis for related engineering construction.
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Exergoeconomic Analysis of A Twostage Absorption Refrigeration System Using the Waste Geothermal Water
WANG Yong-Zhen, LUO Xiang-Long, CHEN Ying, HU Jia-Hao, GONG Yu-Lie
Journal of Guangdong University of Technology. 2015, 32 (1): 42-49.
DOI: 10.3969/j.issn.1007-7162.2015.01.010
With a concern of the vast geothermal waste water during the operation of flash geothermal power plant in Fengshun and the residents′ need for cooling load, this paper proposes an integrated system which synthesizes a TSARS to the original flash power generation cycle, improving the utilization efficiency of the geothermal water by taking the advantage of two-stage LiBr-H2 O absorption refrigeration system(TSARS) in the utilization of low grade heat. First, with the field research made to establish the exergoeconomic model, analysis of this geothermal water integrated system was addressed. Then, Comparing the ways of the geothermal water entering the TSARS, it was found that the parallel way is better than the cascade on the exergoeconomic performance. In addition, exergoeconomic analysis of each equipment of the paralleled TSARS was made. All above provide a certain reference to the further actual engineering application.
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The Characteristics of Acoustic Wave Divider Measuring Bubble Velocity
HU Liu, LONG Jian-Jun, DI Peng-Fei
Journal of Guangdong University of Technology. 2015, 32 (1): 50-54.
DOI: 10.3969/j.issn.1007-7162.2015.01.011
In order to measure the bubble velocity, the main parameter of seafloor seepage, this paper proposes a method that the homologous acoustic is divided into two parts by acoustic wave divider. The structure is designed based on acoustic waveguide theory and acoustic wave propagation principle. Verification experiments of the transducer indicate that the performance of two receiving transducers is basically identical, which can meet the calibration experiments of wave divider. Experimental comparison of the wave divider characteristics in air and water has been made. The experiments in air show that the path, amplitude and spectrum characteristics are almost consistent after the homologous acoustic wave goes through two branches of the divider, which proves the design is reasonable; while the experiments in water show that the energy of homologous acoustic wave loses about 20% through two branches of the divider, indicating that in order to reduce the loss of wave in water, the acoustic reflection components are needed.
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Design of a Monitoring and Controlling System for Poultry Breeding
WANG Wei-Le, GAO Jun-Li, ZHU Hui-Hua, CHEN Wei
Journal of Guangdong University of Technology. 2015, 32 (1): 66-70.
DOI: 10.3969/j.issn.1007-7162.2015.01.014
According to automatic poultry breeding, this paper discusses a design for automatic monitoring system of poultry breeding. This system takes each breeding house a single unit. By taking the advantage of ADAM model, environmental detection model and PC Auto configuration software, the environmental parameters of the breeding houses, including temperature, humidity, illumination intensity and harmful gas concentration are automatically monitored. Indoor lights, curtains, spray equipment can also be automatically controlled. The test proves the design stable performance and great practicality.
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Fuzzy Adaptive Output Tracking Control for a Class of Uncertain Nonlinear Systems
TIAN Wei-Gang, WANG Yin-He, LI Yu-Jiao
Journal of Guangdong University of Technology. 2015, 32 (1): 91-97.
DOI: 10.3969/j.issn.1007-7162.2015.01.019
In this paper, a fuzzy adaptive output tracking controller is designed for a class of uncertain nonlinear systems to track a given sign. First, a time-varying parameter is introduced into the Gaussian membership functions of the rule antecedent, so that a new set of fuzzy rules with a time-varying parameter is given. This implies that the update motion of timevarying parameter changes not only the centers and widths of Gaussian membership functions, but also the output of the previous Mamdani fuzzy logic system, and thus a new fuzzy logic system with a timevarying parameter is synthesized. And then the modified fuzzy logic system can be used to approximate the unknown nonlinear term of the system, and the adaptive laws of timevarying parameter and the estimated values of the fuzzy approximate accuracy can be constructed, accordingly the fuzzy adaptive output tracking controller of the system can be synthesized. The advantage of the proposed method in this paper is that by the full use of existing limited number of fuzzy rules, the fuzzy adaptive output tracking controller can be synthesized with more fewer adaptive laws. Finally, the Duffing system′s simulation example demonstrates that the proposed method in this paper is feasible and effective.
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