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| XU,CHUNPING; YU,JINWEI; ZHAO,SHANSHAN; WU,SHUNGSHUNG; HE,PEIXIN; JIA,XUEWEI; LIU,YANQI; MAO,DUOBIN. |
| ABSTRACT The effect on different three carbon source (i.e. glucose, fructose and sucrose) on production, chemical characterization and antioxidant activity of exopolysaccharide (EPS) produced by Phellinus vaninii Ljup was investigated in this study. Amongst carbon sources examined, glucose and sucrose were favorable for the mycelia growth, while the maximum EPS yield was achieved when sucrose was employed. The predominant carbohydrate compositions in EPSs identified were gluconic acid, glucose, mannose and galactose acid. Then, FT-IR spectral analysis revealed prominent characteristic groups in EPSs. EPSs molecule exist as nearly globular shape form in aqueous solution. The variation also affects antioxidant activities by investigated by using hydroxyl and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phellinus vaninii Ljup; Exopolysaccharide; Carbon source; Antioxidant activity; Composition. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000502033 |
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| XU,AIFEI; FAN,ZHONG; CHEN,ZHIYAN; ZHOU,YUN; LIU,SHAOHUA; HUANG,SHIJIE; XU,XUEQUIN; LONG,CONGYUN; WANG,WEIGANG; ZHU,JING; LI,XIAOLAN; XU,CHUNPING. |
| ABSTRACT A simple and sensitive method for simultaneous determination of furan and vinyl acetate (VA) in vapor phase of mainstream cigarette smoke with cold trap and gas chromatography-mass spectrometry (GC-MS) was developed. A Cambridge filter pad (CFP) was placed in front of the impingers of smoking machine to remove the particle phase from cigarette smoke. Furan and VA in vapor phase of mainstream cigarette smoke were collected in two impingers connected in series by filled with methanol at -78°C. The solutions were added with deuterium-labeled furan-d4 and VA-d6 as internal standards and analyzed by GC-MS. The results showed that the calibration curves for furan and VA were linear (r2 > 0.9995) over the studied concentration range. The intra- and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vapor phase; Mainstream cigarette smoke; Furan; Vinyl acetate; Cold trap; Gas chromatography-mass spectrometry. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000200383 |
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