surface complexes
8.Results:Narrow QRS complexes retrograde P? waves,the ratio of R P?≥P? R interval≥1 and in surface ECG retrograde P? waves were inversive in Ⅱ,Ⅲ,avF,vertical in avR. The same ecentric atrial activation sequence was shown during right ventricular pacing and tachycardia. Degressive ventriculoatrial conduction with long V A interval.
9.Many research groups in the world have been studying the magnetotransport of CrO_2. It is found that improved magnetoresistances have been obtained in complexes, such as CrO_2/Cr_2O_3, CrO_2/polymer, CrO_2/TiO_2, etc. All of those indicate that the surface properties take an important part in the magnetotransport of CrO_2 cold-pressed powders.
10.Acid sites of HY zeolite and the formation and characterization of transition metal complexes[Ni(111)(en):Cl_2]+in zeolites were studied by IR, SS-NMR, ESR, diffuse reflectance and ESCA spectrometers. It was proved that IR and SS-NMR study using trimethylphosphine as a probe molecule was a sensitive and promising method to measure acid sites and to distinguish acid type on the surface of zeolites.
