目的探讨富集有核细胞层沉淀法制备的非小细胞肺癌(non small cell lung cancer,NSCLS)胸腔积液细胞沉渣块中的表皮生长因子受体(EGFR)基因的突变率。方法选取NSCLS伴恶性胸腔积液患者116例,应用富集有核细胞层沉淀法制备胸腔积液细胞...目的探讨富集有核细胞层沉淀法制备的非小细胞肺癌(non small cell lung cancer,NSCLS)胸腔积液细胞沉渣块中的表皮生长因子受体(EGFR)基因的突变率。方法选取NSCLS伴恶性胸腔积液患者116例,应用富集有核细胞层沉淀法制备胸腔积液细胞沉渣块,并应用突变扩增阻滞系统(ARMS)法检测胸腔积液细胞沉渣块中的EGFR基因的突变情况。结果EGFR基因突变率为50.86%,其中腺癌突变率为57.83%,非腺癌突变率为33.33%。结论富集有核细胞层沉淀法制备的NSCLS胸腔积液细胞沉渣块中EGFR基因突变率高于传统的离心细胞沉渣法,有效提高了肿瘤细胞的获得率及DNA提取率,为肺癌患者的诊断、治疗及分子生物学检测提供了有效手段。展开更多
In order to overcome the defects of air-agitated seed precipitation, such as scaring, liquid short-(circuiting,) the three-dimension flow fields with different structure are numerically simulated by computational flui...In order to overcome the defects of air-agitated seed precipitation, such as scaring, liquid short-(circuiting,) the three-dimension flow fields with different structure are numerically simulated by computational fluid dynamics software. Euler/Euler approach was used to study the effects of structure on the flow field in the tank. Multi-fluid model, body-fitted coordinates and multi-block gird were adopted in the simulation. The simulating results are well consonant with the practical situations. The flow field is improved obviously when the flow velocity increases from (0.089m/s) to 0.1920.300m/s at the bottom of the optimized tank and therefore the scaring is reduced greatly in the industrial production. With a gathering sill, the problem of short-circuiting, which always appeares in the upper of the tank, can be solved very well.展开更多
In order to expand the application of the basic magnesium carbonate in the field of flame retardant,the plate-like basic magnesium carbonate(Mg5(CO3)4(OH)2.4H2O)was prepared successfully by template-mediated/homogeneo...In order to expand the application of the basic magnesium carbonate in the field of flame retardant,the plate-like basic magnesium carbonate(Mg5(CO3)4(OH)2.4H2O)was prepared successfully by template-mediated/homogeneous precipitation method,using magnesium chloride hexahydrate(MgCl2.6H2O)and urea(CO(NH2)2)as reaction materials.Phase and morphology of the product were characterized by X-ray diffraction(XRD),scanning electron microscope(SEM)and atomic force microscope(AFM),respectively.The results showed that well-crystallized plate-like Mg5(CO3)4(OH)2.4H2O can be prepared at the water bath temperature of 100°C,water bath time of 24 h,the aging time of 5 h after adding organic template agent.The investigation on organic template mediated mechanism shows that the template affects the crystal morphology by changing surface energy of different crystal plane.Through a preliminary study on the growth mechanism of the product,it is found that the generation of the plate-like Mg5(CO3)4(OH)2.4H2O could be explained by two-dimensional nucleation/step growth mechanism.展开更多
The possibility of multiplicity in an isothermal continuous mixed suspension-mixed product removalcrystallizer is explored using the bifurcation theory. A process involving agglomeration controlled precipitationis con...The possibility of multiplicity in an isothermal continuous mixed suspension-mixed product removalcrystallizer is explored using the bifurcation theory. A process involving agglomeration controlled precipitationis considered in which secondary nucleation occurs simultaneously with primary nucleation. The determinantequations for the existence of multiple steady states are developed and the multiplicity boundaries dependent on thephysical and kinetic properties and operational parameters of the process are obtained by resolving these determinantequations. The number of steady states in the precipitator for various multiplicity regions is determined and thelinear stability of these steady states is analyzed by using the Routh criterion.展开更多
文摘目的探讨富集有核细胞层沉淀法制备的非小细胞肺癌(non small cell lung cancer,NSCLS)胸腔积液细胞沉渣块中的表皮生长因子受体(EGFR)基因的突变率。方法选取NSCLS伴恶性胸腔积液患者116例,应用富集有核细胞层沉淀法制备胸腔积液细胞沉渣块,并应用突变扩增阻滞系统(ARMS)法检测胸腔积液细胞沉渣块中的EGFR基因的突变情况。结果EGFR基因突变率为50.86%,其中腺癌突变率为57.83%,非腺癌突变率为33.33%。结论富集有核细胞层沉淀法制备的NSCLS胸腔积液细胞沉渣块中EGFR基因突变率高于传统的离心细胞沉渣法,有效提高了肿瘤细胞的获得率及DNA提取率,为肺癌患者的诊断、治疗及分子生物学检测提供了有效手段。
基金Project(030620) supported by the Dissertation Innovation Fund of Central South University
文摘In order to overcome the defects of air-agitated seed precipitation, such as scaring, liquid short-(circuiting,) the three-dimension flow fields with different structure are numerically simulated by computational fluid dynamics software. Euler/Euler approach was used to study the effects of structure on the flow field in the tank. Multi-fluid model, body-fitted coordinates and multi-block gird were adopted in the simulation. The simulating results are well consonant with the practical situations. The flow field is improved obviously when the flow velocity increases from (0.089m/s) to 0.1920.300m/s at the bottom of the optimized tank and therefore the scaring is reduced greatly in the industrial production. With a gathering sill, the problem of short-circuiting, which always appeares in the upper of the tank, can be solved very well.
基金Project(51374155)supported by the National Natural Science Foundation of ChinaProject(2014BCB034)supported by the Hubei Province Key Technology R&D Program,ChinaProject(2014CFB796)supported by the Natural Science Foundation of Hubei Province of China
文摘In order to expand the application of the basic magnesium carbonate in the field of flame retardant,the plate-like basic magnesium carbonate(Mg5(CO3)4(OH)2.4H2O)was prepared successfully by template-mediated/homogeneous precipitation method,using magnesium chloride hexahydrate(MgCl2.6H2O)and urea(CO(NH2)2)as reaction materials.Phase and morphology of the product were characterized by X-ray diffraction(XRD),scanning electron microscope(SEM)and atomic force microscope(AFM),respectively.The results showed that well-crystallized plate-like Mg5(CO3)4(OH)2.4H2O can be prepared at the water bath temperature of 100°C,water bath time of 24 h,the aging time of 5 h after adding organic template agent.The investigation on organic template mediated mechanism shows that the template affects the crystal morphology by changing surface energy of different crystal plane.Through a preliminary study on the growth mechanism of the product,it is found that the generation of the plate-like Mg5(CO3)4(OH)2.4H2O could be explained by two-dimensional nucleation/step growth mechanism.
文摘The possibility of multiplicity in an isothermal continuous mixed suspension-mixed product removalcrystallizer is explored using the bifurcation theory. A process involving agglomeration controlled precipitationis considered in which secondary nucleation occurs simultaneously with primary nucleation. The determinantequations for the existence of multiple steady states are developed and the multiplicity boundaries dependent on thephysical and kinetic properties and operational parameters of the process are obtained by resolving these determinantequations. The number of steady states in the precipitator for various multiplicity regions is determined and thelinear stability of these steady states is analyzed by using the Routh criterion.
