A macro-circuit equivalent model for ferroelectric liquid crystal （FLC） is proposed. The model includes both effects of ferroelectric toque and dielectric torque and is utilized to simulate the switching response an...A macro-circuit equivalent model for ferroelectric liquid crystal （FLC） is proposed. The model includes both effects of ferroelectric toque and dielectric torque and is utilized to simulate the switching response and memory behavior of a single FLC cell . Simulation results show that the delay time has a minimum while increasing the amplitude of drive voltage and the amplitude of bipolar pulses should be controlled within a certain range to realize the memory behavior. Also the switching angle is successfully enhanced to the reference value of 22.5° by adopting ＂AC stabihzation＂ addressing method.展开更多
The polarization and absorption principle of corona virus in the electric field is presented. It is expressed by the mathematic differential equation based on the physical model. According to the parameters of the dip...The polarization and absorption principle of corona virus in the electric field is presented. It is expressed by the mathematic differential equation based on the physical model. According to the parameters of the dipole moment of virus, the electric field force exerted by the external electric field can be calculated. According to the parameters of size, mass and elastic modular, etc., the moment of inertia of virus can be calculated. According to the viscosity of tissues, the resistant force when virus rotates can be calculated. According to the balance condition of relaxation polarization, when the drive force equals to the resistant force, the rotating or swaying frequency of virus can be calculated. According to the heat producing condition such as friction, the temperature rising of virus can be calculated. When the temperature exceeds a certain threshold, virus would be inactivated. Through the calculation, it is found that the movement type of the virus depends on the intensity and frequency of the external electric field, which are the effects of "intensity widows" and "frequency windows". It also gives approximate calculation of the temperature rising of the virus according to this model. The vitro experiment confirms the reasonability of this model. The electric fields of different densities of a certain frequency are applied to the solution of avian infectious bronchitis virus. Through the toxicity experiment of the SPF chicken embryo, it is found that the toxicity is decreased exceedingly with a certain intensity of the applied voltage. EID50 decreases from 6.70/0.2 mL to 2.66/0.2 mL. It is proved that the avian infectious bronchitis virus can be inactivated with a certain low frequency and low-density electric field.展开更多
Y2000-62067-415 0014180GaAs/AlAs 超晶格高阶子带的光致发光=Photolumi-nescence from higher=subbands of GaAs/AlAs superlat-tices[会,英]/Domoto,C.& Ohtani,N.//1998 IEEEInternational Conference on Optoelectronic and Mi...Y2000-62067-415 0014180GaAs/AlAs 超晶格高阶子带的光致发光=Photolumi-nescence from higher=subbands of GaAs/AlAs superlat-tices[会,英]/Domoto,C.& Ohtani,N.//1998 IEEEInternational Conference on Optoelectronic and Micro-electronic Materials and Devices.—415～418(EC)Y2000-62270 00141811999年 IEEE 第十三届液体电介质国际会议会议录=1999 IEEE proceedings of 13th internatiorlaI展开更多
Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) has been used for many years to rapidly identify whole bacteria. However, no consistent methodology exists for the rapid iden...Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) has been used for many years to rapidly identify whole bacteria. However, no consistent methodology exists for the rapid identification of bacteria cultured in liquid media. Thus, in this study we explored the use of MALDI-TOF MS analysis for rapid identification of cells cultured in liquid media. We determined that 2,5-dihydroxybenzoic acid (50 mg mL-1, 50% acetonitrile, 0.1% trifluoroacetic acid) was the best matrix solution for MALDI-TOF MS for this type of study. Moreover, the tested strains were successfully differentiated by principal component analysis, and the main characteristics of the mass peaks for each species were found in mixed culture samples. In addition, we found that the minimum number of cells for detection was 1.8×103. In conclusion, our findings suggest that MS-based techniques can be developed as an auxiliary method for rapidly and accurately identifying bacteria cultured in liquid media.展开更多
基金Supported by the National Natural Science Foundation of China （No. 10174057 90201011）, the Technology Import Item of Ministry of Education （No. 105148）, the Application Foundation of Sichuan Province （No. 03JY029-048-1 ） and the Science Study Foundation of Southwest Jiaotong University （No. 2001B11）.
文摘A macro-circuit equivalent model for ferroelectric liquid crystal （FLC） is proposed. The model includes both effects of ferroelectric toque and dielectric torque and is utilized to simulate the switching response and memory behavior of a single FLC cell . Simulation results show that the delay time has a minimum while increasing the amplitude of drive voltage and the amplitude of bipolar pulses should be controlled within a certain range to realize the memory behavior. Also the switching angle is successfully enhanced to the reference value of 22.5° by adopting ＂AC stabihzation＂ addressing method.
基金the National Natural Science Foundation of China (Grant No.50477007)
文摘The polarization and absorption principle of corona virus in the electric field is presented. It is expressed by the mathematic differential equation based on the physical model. According to the parameters of the dipole moment of virus, the electric field force exerted by the external electric field can be calculated. According to the parameters of size, mass and elastic modular, etc., the moment of inertia of virus can be calculated. According to the viscosity of tissues, the resistant force when virus rotates can be calculated. According to the balance condition of relaxation polarization, when the drive force equals to the resistant force, the rotating or swaying frequency of virus can be calculated. According to the heat producing condition such as friction, the temperature rising of virus can be calculated. When the temperature exceeds a certain threshold, virus would be inactivated. Through the calculation, it is found that the movement type of the virus depends on the intensity and frequency of the external electric field, which are the effects of "intensity widows" and "frequency windows". It also gives approximate calculation of the temperature rising of the virus according to this model. The vitro experiment confirms the reasonability of this model. The electric fields of different densities of a certain frequency are applied to the solution of avian infectious bronchitis virus. Through the toxicity experiment of the SPF chicken embryo, it is found that the toxicity is decreased exceedingly with a certain intensity of the applied voltage. EID50 decreases from 6.70/0.2 mL to 2.66/0.2 mL. It is proved that the avian infectious bronchitis virus can be inactivated with a certain low frequency and low-density electric field.
文摘Y2000-62067-415 0014180GaAs/AlAs 超晶格高阶子带的光致发光=Photolumi-nescence from higher=subbands of GaAs/AlAs superlat-tices[会,英]/Domoto,C.& Ohtani,N.//1998 IEEEInternational Conference on Optoelectronic and Micro-electronic Materials and Devices.—415～418(EC)Y2000-62270 00141811999年 IEEE 第十三届液体电介质国际会议会议录=1999 IEEE proceedings of 13th internatiorlaI
基金supported by the National Science and Technology Major Project (Grant No. 2008ZX10207)the Innovation Method Fund of Ministry of Science and Technology of China (Grant Nos. 2008IM022000 and 2009IM030300)the National Science and Technology Support Program (Grant No. 2008BAK41B0)
文摘Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) has been used for many years to rapidly identify whole bacteria. However, no consistent methodology exists for the rapid identification of bacteria cultured in liquid media. Thus, in this study we explored the use of MALDI-TOF MS analysis for rapid identification of cells cultured in liquid media. We determined that 2,5-dihydroxybenzoic acid (50 mg mL-1, 50% acetonitrile, 0.1% trifluoroacetic acid) was the best matrix solution for MALDI-TOF MS for this type of study. Moreover, the tested strains were successfully differentiated by principal component analysis, and the main characteristics of the mass peaks for each species were found in mixed culture samples. In addition, we found that the minimum number of cells for detection was 1.8×103. In conclusion, our findings suggest that MS-based techniques can be developed as an auxiliary method for rapidly and accurately identifying bacteria cultured in liquid media.
