Determination of antioxidant and α-glucosidase inhibitory activities and luteolin contents of Chrysanthemum morifolium Ramat extracts

2011 ◽  
Vol 10 (82) ◽  
Author(s):  
Jinfeng Yang
Keyword(s):  
Chrysanthemum Morifolium ◽  
Inhibitory Activities ◽  
Chrysanthemum Morifolium Ramat

PYRAZOPHOS RESIDUES FROM TREATED GREENHOUSE AND GROWTH CHAMBER GROWN CHRYSANTHEMUMS

1989 ◽  
Vol 69 (3) ◽  
pp. 961-966
Author(s):  
R. FRANK ◽  
H. E. BRAUN ◽  
J. STANEK ◽  
G. RITCEY
Keyword(s):  
Half Life ◽  
Chrysanthemum Morifolium ◽  
Growth Chamber ◽  
Plant Tissues ◽  
Cut Flower ◽  
Multiresidue Method ◽  
Chrysanthemum Morifolium Ramat

Potted and cut flower chrysanthemums (Chrysanthemum morifolium Ramat) were sprayed with 450 mg L−1 a.i. of pyrazophos grown under growth chamber and greenhouse conditions, respectively. A multiresidue method was tested for use on extraction and determination of pyrazophos on chrysanthemums and it was found to give 96% recoveries. Under growth chamber conditions pyrazophos disappeared from potted chrysanthemum plants with a half-life of between 19 and 25 d. On day 0, after allowing the spray to dry, 82% of the residue was removed by washing; at day 35, the amount removed was 43%. Removal by swabbing over the 35 d varied from 4.2% to 7.1%. In six commercial cut flower crops of greenhouse grown chrysanthemums, no evidence of pyrazophos breakdown was observed in plant tissues analyzed between the last spray date and sale of flowers 14 d later. During this period, swabs (wipings) dislodged between 2.7 and 4.6% of surface pyrazophos residue. These data strongly support a recommendation to wear gloves when handling both cut and potted chrysanthemums as workers can spend 30 and 60 h, respectively, handling the crop over each 13- to 15-wk production period.Key words: Pyrazophos, residues, chrysanthemums, greenhouse

scholarly journals Analyses of the Compositions, Antioxidant Capacities, and Tyrosinase-Inhibitory Activities of Extracts from Two New Varieties of Chrysanthemum morifolium Ramat Using Four Solvents

2021 ◽  
Vol 11 (16) ◽  
pp. 7631
Author(s):  
Yen Hua Chen ◽  
Sheng Lei Yan ◽  
Jane Yii Wu ◽  
Chang Wei Hsieh ◽  
Sue Hong Wang ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Inhibitory Activity ◽  
Reducing Sugars ◽  
Chrysanthemum Morifolium ◽  
Total Flavonoids ◽  
Chlorogenic Acids ◽  
Tyrosinase Inhibitory Activity ◽  
Antioxidant Capacities ◽  
Inhibitory Activities ◽  
Chrysanthemum Morifolium Ramat

Chrysanthemum morifolium Ramat is traditionally used as both medicine and food in China. In this study, extracts of C. morifolium Ramat Hang Ju No. 1 (No. 1) and No. 2 (No. 2) were produced using four different solvents: 95% ethanol, ethyl acetate, n-hexane and distilled water. In total, eight types of extracts were analyzed for extraction yields and total flavonoids, polyphenols, glycans, reducing sugars, and chlorogenic acids. The antioxidant capacities and tyrosinase-inhibitory activities of these extracts were also determined. Among them, the ethanolic extract of No. 1 (No. 1A) had the highest levels of total flavonoids (16.71 mg rutin equivalent/g dry weight (DW)), polyphenols (7.07 mg gallic acid equivalent/g DW), and chlorogenic acids (6595.46 μg/g DW) and the water extract of No. 1 (No. 1D) had the highest levels of total glycans (9.24 mg/g DW), and reducing sugars (23.32 μg/g DW). In terms of antioxidant capacity, No. 1A (1.0 mg/mL) demonstrated the best 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity (96.2 ± 0.4%), ferrous ion chelating ability (55.44 ± 0.03%), and reducing power (0.988 ± 0.003). No. 1D (1.0 mg/mL) showed the highest tyrosinase inhibitory activity (39.34 ± 0.03%). From these results, high levels of total flavonoids and polyphenols correlate with antioxidant capacity. Moreover, high levels of total chlorogenic acid in No. 1A and No. 1D correlate with high levels of tyrosinase inhibitory activity. Therefore, No. 1A has the potential to be used in daily health drinks, foods and skin whitening products. These results can be applied to similar flower plant extracts.

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