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The present study aims to determine whether aloin could protect cells from ischemic and reperfusion injury in vitro and to elucidate the related mechanisms. Oxygen and glucose deprivation model in PC12 cells was used in the present study. 2-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT), lactate dehydrogenase (LDH) assay and Hoechst 33342 nuclear staining were used to evaluate the...
In the paper, a high linearity quadrature demodulator based on SiGe BiCMOS process is designed and implemented for 400MHz to 2GHz wide band wireless system. The 3rd intermodulation cancellation technique is applied to improve linearity. A negative feedback structure is applied to quadrature Gilbert mixer to lower its input impedance. RC polyphase network is analyzed and designed to increase the quadrature...
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