This article reports a method for examining the intracellular structure of fish gonads using a scanning electron microscope(SEM). The specimen preparation procedure is similar to that for transmission electron microsc...This article reports a method for examining the intracellular structure of fish gonads using a scanning electron microscope(SEM). The specimen preparation procedure is similar to that for transmission electron microscopy wherein samples cut into semi thin sections are fixed and embedded in plastic. The embedment matrix was removed by solvents. Risen free specimens could be observed by SEM. The morphology of matured sperms in the gonad was very clear, and the oocyte internal structures appeared in three dimensional images. Spheroidal nucleoli and yolk vesicles and several bundles of filaments adhered on the nucleoli could be viewed by SEM for the first time.展开更多
This article describes the design, modelling and characterization of transmission lines for millimetre wave silicon integrated circuits up to 65 GHz. The simulation results of three different EM （electro-magnetic） s...This article describes the design, modelling and characterization of transmission lines for millimetre wave silicon integrated circuits up to 65 GHz. The simulation results of three different EM （electro-magnetic） simulators for a selected hybrid coplanar layout structure are presented. Two different deembedding methods are investigated and compared with respect to sensitivity to typical measurement errors. Finally both methods are applied to the measurement results of the fabricated test structures in a 250 nm BiCMOS technology showing good agreement to EM simulations and predicted sensitivity to measurement errors.展开更多
文摘This article reports a method for examining the intracellular structure of fish gonads using a scanning electron microscope(SEM). The specimen preparation procedure is similar to that for transmission electron microscopy wherein samples cut into semi thin sections are fixed and embedded in plastic. The embedment matrix was removed by solvents. Risen free specimens could be observed by SEM. The morphology of matured sperms in the gonad was very clear, and the oocyte internal structures appeared in three dimensional images. Spheroidal nucleoli and yolk vesicles and several bundles of filaments adhered on the nucleoli could be viewed by SEM for the first time.
文摘This article describes the design, modelling and characterization of transmission lines for millimetre wave silicon integrated circuits up to 65 GHz. The simulation results of three different EM （electro-magnetic） simulators for a selected hybrid coplanar layout structure are presented. Two different deembedding methods are investigated and compared with respect to sensitivity to typical measurement errors. Finally both methods are applied to the measurement results of the fabricated test structures in a 250 nm BiCMOS technology showing good agreement to EM simulations and predicted sensitivity to measurement errors.
