摘要:

AbstractNanoflakes Co(OH)2porous films have been successfully electrochemical deposited on nickel foam substrate from cobalt nitrate dissolved in water and water‐ethanol (1:1 volume ratio) solutions, respectively. Field emission scanning electron microscope (FESEM) studies indicate that the films electrodeposited from both solutions have nanoflakes porous structure. Cyclic voltammetry (CV) and galvanostaitc charge/discharge measurements show that the Co(OH)2films electrode deposited in water‐ethanol solution has excellent electrochemical capacitance between a potential range of 0‐0.4 V, and the maximum specific capacitance as high as 2369 F g−1could be achieved in 2 M KOH solution at a charge‐discharge current density of 2 A g−1, suggesting its potential application in the electrode material for electrochemical capacitors. Meanwhile, the properties of the nanoflakes Co(OH)2porous films electrodeposited in water solution are also discussed for

ISSN:0009-4536    

DOI:10.1002/jccs.201000063

出版商:WILEY‐VCH Verlag    

年代:2010

数据来源: WILEY

摘要:

AbstractThis study aims to establish a HPLC method for the simultaneous determination of hesperidin (HE), ferulic acid (FA), cinnamic acid (CA) and cinnamaldehyde (CAD) in a Chinese tonic wine, Ma‐Zu‐Wan‐Show‐Yao‐Jyo. After filtering the tonic wine, the filtrate was separated on a C18 column (250 × 4.6 mm, 5 μm) by gradient elution of acetonitrile‐aqueous solution. The regression equations were linear (r ≥ 0.9999) in the range of 1.5‐150.0 μg/mL for HE, 0.3‐60.0 μg/mL for FA, 0.06‐6.0 μg/mL for CA, and 0.1‐80.0 μg/mL for CAD. The relative standard deviation and relative error were less than 5.0% and 4.0%, respectively, for intra‐ and inter‐day analyses. The limits of detection (LOD) were 0.6, 0.075, 0.012 and 0.02 μg/mL for HE, FA, CA and CAD (S/N = 3, 20 μ1 injection) respectively. This method can be used to standardize the quality control of Chinese tonic wine to ensure accu

ISSN:0009-4536    

DOI:10.1002/jccs.201000064

出版商:WILEY‐VCH Verlag    

年代:2010

数据来源: WILEY

摘要:

AbstractAnew farnesene derivative, 7R*,10S*‐epoxy‐3E,5E‐farnesadien‐1,2,11‐triol, along with eight known compounds was isolated from the aerial parts ofSenecio cannabifolius. Their structures were established on the basis of spectroscopi

ISSN:0009-4536    

DOI:10.1002/jccs.201000065

出版商:WILEY‐VCH Verlag    

年代:2010

数据来源: WILEY