1,626 research outputs found
Potential refugia in Taiwan revealed by the phylogeographical study of Castanopsis carlesii Hayata (Fagaceae)
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Allozyme variation of Cyclobalanopsis championii (Fagaceae), a narrowly distributed species in southern Taiwan.
No full textAssociation between smoking, Acetaldehyde Dehydrogenase-2 1-1 status, and alcohol drinking among Taiwanese polyvinyl chloride workers.
No full textAllozyme variation of populations of Castanopsis carlesii (Fagaceae) revealing the diversity centres and areas of the greatest divergence in Taiwan.
No full textPhylogeographic study reveals the origin and evolutionary history of a Rhododendron species complex in Taiwan
No full textUniform genetic diversity, low differentiation, and neutral evolution characterize contemporary refuge populations of Taiwan fir (Abies kawakamii, Pinaceae)
No full textElectrochemical determination of cysteine based on conducting polymers/gold nanoparticles hybrid nanocomposites
No full text[[abstract]]In this study, a hybrid nanocomposite consisting of a conducting polymer and gold nanoparticles (AuNPs) is fabricated onto a screen-printed carbon electrode (SPCE). A thin layer of poly(3,4-ethylenedioxythiophene)(PEDOT) is coated electrochemically on a bare SPCE; then, the nano-sized AuNPs are embedded by electrochemical deposition. The resultant SPCE/PEDOT/AuNPs-modified electrode is characterized by electrochemical methods, field emission scanning electron microscopy (FE-SEM) and X-ray photoelectron spectroscopy (XPS). The SPCE/PEDOT/AuNPs-modified electrode possesses great catalytic activity for the oxidation of cysteine in various pH buffer solutions (pH 2.0-8.0). The selectivity of the method is demonstrated by the separation of the oxidation peaks at up to 240 mV for cysteine and glutathione in pH 6.0 buffer solutions. The effects of the oxidizable interferences are also investigated. Flow-injection amperometry is performed for 0.5-200 mu M of cysteine in pH 4.0 buffer solutions, and a linear calibration plot with a slope of 0.115 mu A/mu M is obtained. The detection limit (S/N = 3) is 0.05 mu M. Additionally, the proposed methods obtain satisfactory results in the detection of cysteine-containing medicine samples. (C) 2011 Elsevier Ltd. All rights reserved.[[note]]SC
Troglitazone suppresses transforming growth factor beta-mediated fibrogenesis in retinal pigment epithelial cells.
No full textContrasting phylogeographical patterns of two closely related species, Machilus thunbergii and Machilus kusanoi (Lauraceae), in Taiwan.
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