Analysis on the Physicochemical Properties of Ginkgo biloba Leaves after Enzymolysis Based Ultrasound Extraction and Soxhlet ExtractionReportar como inadecuado




Analysis on the Physicochemical Properties of Ginkgo biloba Leaves after Enzymolysis Based Ultrasound Extraction and Soxhlet Extraction - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

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Institute of Chemical Industry of Forest Products, CAF, Nanjing 210042, Jiangsu, China

2

National Engineering Laboratory for Biomass Chemical Utilization, Nanjing 210042, Jiangsu, China

3

Key and Open Laboratory on Forest Chemical Engineering, SFA, Nanjing 210042, Jiangsu, China

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Key Laboratory of Biomass Energy and Material, Nanjing 210042, Jiangsu, China

5

Institute of New Technology of Forestry, CAF, Beijing 100091, China





*

Author to whom correspondence should be addressed.



Academic Editor: Derek J. McPhee

Abstract In this study, high performance liquid chromatography HPLC, ultraviolet UV, thermagravimetric analyzer TGA, pyrolysis-gas chromatography-mass spectrometry Py-GC-MS, and scanning electron microscope SEM were used as measurement techniques, contents of chemical composition, pyrolytic products, thermal stability, morphological characterization of Ginkgo biloba leaves GBL acted as the index, and physicochemical properties of GBL after enzymolysis based ultrasound extraction EBUE and Soxhlet extraction were studied. The detection results of chemical composition revealed that contents of general flavone, soluble protein, soluble total sugar and protein in the GBL declined significantly after EBUE, and contents of polyprenols and crude fat obviously reduced as well after Soxhlet extraction. Py-GC-MS results indicated that total GC contents of micromolecules with carbon less than 12 from 54.0% before EBUE decline to 8.34% after EBUE. Total GC contents of long-chain fatty acids with carbon less than 20 from 43.0% before EBUE reduced to 27.0% after Soxhlet extraction. Thermal stability results showed that GBL after Soxhlet extraction was easier to decompose than GBL before EBUE. SEM results illustrated that surface structure of GBL was damaged severely after EBUE, compared with GBL before EBUE, while organic solvent extraction had little influence on the morphological characterization of GBL after Soxhlet extraction compared with GBL after EBUE. View Full-Text

Keywords: physicochemical properties; Ginkgo biloba leaves; enzymolysis; ultrasound; Soxhlet extraction physicochemical properties; Ginkgo biloba leaves; enzymolysis; ultrasound; Soxhlet extraction





Autor: Chang-Wei Zhang 1,2,3,4, Cheng-Zhang Wang 1,2,3,4,5,* and Ran Tao 1,2,3,4

Fuente: http://mdpi.com/



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