| [characters of greening tree species in heavy metal pollution protection in shanghai]. | in this paper, the stream banks nearby qibao town and the factory area of shanghai baoshan steel company were selected as the typical areas contaminated by heavy metals. the polluted status was investigated by measuring the heavy metal concentrations of the sampled soils. the results showed that the heavy metal concentrations in the soils of stream banks were a little higher than the control, but obviously higher in the factory area of shanghai baoshan steel company. the growth status of the gre ... | 2004 | 15334971 |
| new monoterpene glycosides and phenolic compounds from distylium racemosum and their inhibitory activity against ribonuclease h. | two new monoterpene glycosides, distyloside a-b (1-2), and a new megastigmane glucoside, iso-dihydrodendranthemoside a (3) were isolated from twigs and leaves of distylium racemosum, along with five known phenolic compounds (4-8). the structures were established via spectroscopic techniques and chemical transformations, and the absolute stereochemistry of 3 was determined by mosher's esterification. a homogeneous fluorescence resonance energy transfer (fret) quenching assay was used to determine ... | 2011 | 21489793 |
| evaluation of antioxidant and α-glucosidase inhibitory activities of some subtropical plants. | the antioxidant and α-glucosidase inhibitory activities of the methanolic leaf extracts of some subtropical plants were evaluated in the present study. antioxidant activity was evaluated based on 1,1-diphenyl-2-picrylhydrazyl radical scavenging activity, reducing power, hydrogen peroxide and β-carotene bleaching assays. α-glucosidase inhibitory activity and enzyme kinetics as well as the total phenolic content of the extracts were also investigated. elaeocarpus sylvestris extract had the highest ... | 2014 | 26027154 |
| morphology and phylogenetics of two holoparasitic plants, balanophora japonica and balanophora yakushimensis (balanophoraceae), and their hosts in taiwan and japan. | balanophora japonica and b. yakushimensis are two putatively agamospermic taxa previously reported from southern japan. their inflorescences superficially represent those of b. laxiflora and b. fungosa. in this study we confirmed their presence in taiwan by morphological and phylogenetic analysis using nuclear 18s rdna and nrits sequences with related taxa. b. japonica, b. yakushimensis, and b. laxiflora formed a well-supported clade that is distinct from other balanophora. all three taxa also s ... | 2012 | 21894574 |
| compounds with tyrosinase inhibition, elastase inhibition and dpph radical scavenging activities from the branches of distylium racemosum sieb. et zucc. | twenty compounds were isolated from the ethanol extract of distylium racemosum branches and their inhibitory activities on tyrosinase, elastase and free radicals evaluated. the isolated compounds were identified as dibenzofurans (1-4), abscisic acid (5), 6'-o-galloylsalidroside (6), catechin derivatives (7-11), gallic acid derivatives (12-14), tyrosol (15), flavonoids (16-18), lupeol (19) and 1,2,3,6-tetragalloylglucose (20). for study of tyrosinase inhibition activities, when compared with arbu ... | 2011 | 21351300 |