We used the perforated-patch technique to examine the relationship between Ca2+ entry and exocytosis of large dense-cored vesicles in bovine adrenal chromaffin cells. Exocytosis evoked by single-step depolarizations was monitored by capacitance detection. Ca2+ entry was varied by changing external calcium concentration, stepping to different test potentials, depolarizing for different durations...

in this study, gtaw process and cored wires were used to coat al/al3ti wear resistant composite on a commercial pure al substrate. wire drawing process was utilized to produce the cored wires from aluminum strips and a mixture of titanium and aluminum powders. the microstructures and the present phases were investigated by metallographic, sem equipped with eds and xrd analysis. moreover, the ha...

Dendrimers are highly branched, star-shaped macromolecules with nanometer-scale dimensions. defined by three components: a central core, an interior dendritic structure (the branches), and exterior surface functional groups. Topological indices numerical numbers that help us to understand the topology of different dendrimers can be used predict properties without performing experiments in wet l...

Fe-Cr-C-T-Al flux-cored wire surfacing was performed by laser, arc and hybrid methods. Laboratory tests have shown that the deposited layers vary greatly in terms of wear resistance. To identify reasons, studies were carried out using metallographic, X-ray structural durometric The analysis research results showed reason is difference cooling rates metal range 1100-800 K. This leads to possibil...

This mini-review highlights results on nanocatalysis involving various ferrocene-containing macromolecular supports (arene-cored and Pd-nanoparticle-cored dendrimers dendronized polymers) obtained in our research group during the last 15 years. Nanocatalysis with Pd Au nanoparticles stabilized by these metallomacromolecules have shown excellent catalyst efficiency recyclability very low amounts...

Bis(fluorenyl)benzothiadiazole-cored carbazole dendrimers show high thermal and electrochemical stability, and great potential as solution processed hole-transporting non-doped green emitters for OLEDs. A pure green device with CIE coordinates of (0.27, 0.62) and high luminance efficiencies (up to 10.01 cd A(-1)) is achieved, respectively.

An invasive paraganglioma of the posterior mediastinum caused spinal cord compression in a 31 year old women. Electron microscopic examination of the paraganglioma invading the epidural space revealed numerous dense-cored granules in the cytoplasm of the tumour cells. We are reporting this case to present the ultrastructure of mediastinal paraganglioma, and to call attention to an unusual cause...

Most star polymers with controlled molecular weight and low polydispersity are synthesized by living polymerization, in which only initiation and propagation reactions, but not chain transfer reaction, take place. Accordingly, the obtained star polymers are generally not contaminated with linear polymers. Recently, we have developed chain-growth condensation polymerization, a kind of living pol...

Based on the existing Transductive SVM and via introducing smooth function ( , ) P   to construct smooth cored unconstrained optimization problem, this article will build the optimization model accessible to degenerate solutions to generate an improved transductive SVM, introduce simulated annealing to degenerate the optimization problem, and apply such a Support Vector Classifier to generate...