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Conducted vasomotor responses are viewed as one mechanism that functionally integrates the microvasculature. It is hypothesized that the conducted vasomotor response is the result of an electrical current and its passive electrotonic spread along the length of a microvessel. We tested this hypothesis in isolated, unpressurized arterioles from the hamster(More)
Dye tracers were chosen, based on net charge, chemical structure, and reactive groups, to test for the existence of and to provide novel insight into channel selectivities of junctional pathways connecting smooth muscle and endothelial cells of the arteriolar wall. Dyes were injected into individual smooth muscle or endothelial cells of hamster cheek pouch(More)
We have previously shown that conducted vasomotor responses follow patterns that are consistent with a passive spread of electrical current along the length of the arterioles [(Xia and Duling, Am. J. Physiol. 269 (Heart Circ. Physiol. 38): H2022-H2030, 1995]. In this study, we define the cells through which the current flows. Isolated arterioles of hamster(More)
A fluorescence ratio technique based on the voltage-sensitive dye 1-(3-sulfonatopropyl)-8-[beta-[2-di-n-butylamino)-6-naphythyl++ +]vinyl] pyridinium betaine (di-8-ANEPPS)has been developed for recording membrane potential changes during vascular responses of arterioles. Perfusion of hamster cheek pouch arterioles with the dye labeled the endothelial cell(More)
We sought to understand the excitation-contraction coupling process in arterioles. KCl or phenylephrine (PE) was applied via the superfusion solution or by brief pulsatile ejections from a micropipette onto unpressurized arterioles (in vitro) from either the guinea pig small intestine or hamster cheek pouch. With either mode of application, KCl caused(More)
  • Junting Xia, Qifeng Zhanga, Kwangsuk Parka, Yueming Sunb, Guozhong Caoa
  • 2011
Photoelectrodes of mixed microsized TiO2 aggregates and individually dispersed TiO2 nanocrystallites with different ratios were fabricated and studied for improved power conversion efficiency in dyesensitized solar cells (DSCs). TiO2 aggregates/nanocrystallites composites possess several advantages for high performance of DSCs, including the light(More)
Nanocomposites of commercially available titanium oxide (TiO2) nanoparticles (P25) and a silane coupling agent, methacryloxypropyltrimethoxysilane (MPTS), were incorporated into a homogeneous porous material after UV treatment and heating at 450 ◦C in the air. A dye-sensitized solar cell utilizing this UV-polymerized MPTS-modified sample exhibited(More)
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