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Purpose
To explore endothelial function and plasma matrix metalloproteinase‐2 levels and their association with the size and elastic properties of the ascending aorta in the first‐degree relatives (FDRs) with tricuspid aortic valve (TAV) of individuals with bicuspid aortic valve (BAV).
Methods
Twenty‐six patients with BAV without significant valvular dysfunction, 35 FDRs with TAV, and 29 matched...
The paper that is based on the mesoscopic damage evolution of metal explores the mechanism of Kaiser effect. Unidirectional and multidirectional tensile experiments of Q345 material were conducted to reveal the relationship between the internal damage evolution of mesoscopic holes and Kaiser effect. The results show that the forcewill cause the damage corresponding to the direction of force. When...
Domain switching under an electric filed has been recognized as a fundamental origin causing deterioration and failure of the properties for ferroelectric ceramics. Based on the variations of the in-situ XRD and the macroscopic phenomenological constitutive formulation for PLZT, the present paper formulates the hysteresis loops and the strain loops of ferroelectric ceramics induced by electric fatigue...
Of the range of dielectric elastomer-based actuators that have been developed rolled tubular actuators are among the most promising. These provide larger forces by making multiple layers of dielectric elastomer apply their actuation forces in parallel. Rolled tubular actuators closely mimic muscle functionality providing axial elongation on application of a voltage. The operating characteristics of...
Two strains named W7 and W16 were isolated by liquid enrichment culture from the corn field where atrazine has been chronically applied. Observed by gram stain and SEM, W7 belonged to gram-positive bacteria and the single cell was short bacilliform; W16 belonged to gram-negative bacteria and the single cell was spherical. Through physiological and identification and 16SrDNA sequence analysis, two...
The research chose the alginate sodium and PVA as the materials to immobilize the atrazine degrading bacteria. Four methods were adopted: alginate sodium adsorption method, alginate sodium embedding method, PVA boric cross linking method and PVA freezing method. The degrading effects and the characteristics of the atrazine degrading bacteria in the two materials were studied respectively. The result...
Accumulation of trehalose is suggested to be a critical determinant in improving the stress tolerance of the yeast Saccharomyces cerevisiae. To test the influence of trehalose accumulation on response to freeze stress, we constructed all single and double gene disruption mutants of the trehalase genes ATH1, NTH1 and NTH2 and examined the changes of their trehalose accumulations and their freeze tolerances...
Due to the important physiological functions of GABA, various methods used to produce it. Biotransformation by microorganism cells is a more promising method than others. Among the GABA-producing lactic acid bacteria, one strain with high producing capacity was isolated from Chinese naturally pickled vegetable. The strain is identified as Lactobacillus brevis, and named as L.brevis TCCC13007 based...
The leavening abilities in sweet dough and the invertase activities were determined in several strains of Saccharomyces cerevisiae to investigate their correlations. There was a general tendency that the higher invertase activity yeast cells showed, the less leavening ability the strain possessed in sweet dough containing sucrose. The changes of glucose contents detected in high sucrose model liquid...
This paper is a pilot study on the effect of grass- microorganism combined bioremediation of atrazine contaminated soil. Sorghum hybird sudangrass and ryegrass were selected as two repair grass, and immobilized degrading strain J2 was added into the soil under the indoor pot conditions. When the concentration of atrazine was 20 mg/kg in the soil, grass-microorganism combined bioremediation enjoyed...
The immobilization technology could improve the degradation efficiency and adaptability of bacteria. It is a simple, accurate and safety processing method. The research use alginate sodium embedding method to fix the high efficient atrazine degrading bacteria, research the best immobilized condition of alginate sodium to the atrazine degrading bacteria, provide the theoretical basis for next research...
This paper mainly studies the growth and degradation characteristics of the atrazine degradation strain J2 isolated from the soil collected from the cornfield in northern China with a long history of atrazine application. The growth and the degradation characteristics at different pHs, temperatures and in mediums with different salinity are also studied. The results indicate that: when J2 is inoculated...
This research studied the bioremediation of atrazine polluted soil by atrazine degrading strain J2 which is isolated from the long polluted black glebe in the libratory condition. Inoculated the J2 which OD600 value is 1 into the sterilized soil and non-sterilized soil as 1% ratio (bacterial liquid volume mL /soil weight g) respectively, the atrazine concentration of the soil is 10 mg/Kg. J2 utilized...
This paper mainly studies the growth and degradation characteristics of the Atrazine degradation strain J6 which is isolated from the soil, collected from the corn field in northern China with a long history of atrazine application. The growth and the degradation characteristics at different pHs and temperatures are also studied. Adding J6 into the medium by the ratio of 1 %(v/v), J6 is able to degrade...
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