A series of 21 azapolymethylene copyright surfactants were obtained.The synthesis of the title surfactants in one- or Stemless Wine Glass Gift Box two-step reaction proceeds with good yields.The structure and the purity of the synthesized compounds were determined by 1H and 13C NMR, ESI-MS spectra, and elemental analysis.Moreover, 2D COSY, HMBC, an

Surface acoustic wave (SAW) resonators electrically behave like LCR circuits, their frequency can be influenced by temperature, pressure and torque.When they are used for passive wireless sensing on rotating machinery, they can also be influenced by the angular variations of the coupling between the coupler elements and the receiving coupler elemen

Abstract In human walking, the left and right legs move alternately, half a stride out of phase with each other.Although various parameters, such as stride frequency and length, vary with walking speed, the antiphase relationship remains unchanged.In contrast, during walking in left-right asymmetric situations, the relative phase shifts from the an