Publications by authors named "Hong-Fei Ma"

4 Publications

  • Page 1 of 1

Medium composition optimization, structural characterization, and antioxidant activity of exopolysaccharides from the medicinal mushroom Ganoderma lingzhi.

Int J Biol Macromol 2019 Mar 3;124:1186-1196. Epub 2018 Dec 3.

Beijing Advanced Innovation Centre for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing 100083, China; Institute of Microbiology, Beijing Forestry University, Beijing 100083, China. Electronic address:

To contribute towards effective exploitation and utilization of natural antioxidants, response surface methodology (RSM) was employed to optimize the medium composition for the production of exopolysaccharides from the medicinal mushroom Ganoderma lingzhi (GLEPS). An optimal medium for GLEPS production was gave through Plackett-Burman design, path of steepest ascent, and Box-Behnken design as follows: glucose (59.62 g/L), yeast extract (10.03 g/L), CaCO (0.2 g/L), thiamine (45.13 mg/L), KHPO (1.0 g/L), peptone (1.5 g/L), Tween 80 (10.26 mL/L), ZnSO (0.3 g/L), mannitol (1.5 g/L), MgSO (0.5 g/L), and aspartate (8.86 g/L). The GLEPS yield obtained was 3.57 ± 0.21 g/L-3.16-fold higher than that produced in basal medium alone. The resulting GLEPS rich in uronic acid, d-mannose, l-rhamnose, and d-glucose, was a heteropolysaccharide with high-molecular weights (475,000 kDa and 21.6 kDa, 87.97%). It was demonstrated that the GLEPS with higher carbohydrate and uronic acid contents exhibited strong in vitro antioxidant activities via radical scavenging, reductive capacity, and chelation of transition metal catalysis. These findings indicated that RSM is an efficient tool to predict the composition of culture medium required for maximizing GLEPS yield, and GLEPS had potent antioxidant activities and could be explored as a novel natural antioxidant in functional food or medicine.
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http://dx.doi.org/10.1016/j.ijbiomac.2018.11.274DOI Listing
March 2019

1-(4-Benz-yloxy-5-meth-oxy-2-nitro-phen-yl)ethanone.

Acta Crystallogr Sect E Struct Rep Online 2009 Apr 8;65(Pt 5):o1005. Epub 2009 Apr 8.

Department of Applied Chemistry, College of Science, Nanjing University of Technology, Nanjing 210009, People's Republic of China.

In the mol-ecule of the title compound, C(16)H(15)NO(5), the aromatic rings are oriented at a dihedral angle of 74.89 (3)°. Intra-molecular C-H⋯O inter-actions result in the formation of a seven-membered ring. In the crystal structure, weak inter-molecular C-H⋯O inter-actions link the mol-ecules into chains along the b axis.
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http://dx.doi.org/10.1107/S1600536809011532DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2977694PMC
April 2009

Ethyl 1-[(4-acetyl-2-methoxy-phen-oxy)meth-yl]cyclo-propane-1-carboxyl-ate.

Acta Crystallogr Sect E Struct Rep Online 2009 Jan 14;65(Pt 2):o305. Epub 2009 Jan 14.

In the title compound, C(16)H(20)O(5), the dihedral angle between the planar rings, viz. benzene and cyclo-propane, is 52.1 (2)°. Mol-ecules are connected in the crystal via weak inter-molecular C-H⋯O hydrogen bonds, forming chains in the [001] direction.
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http://dx.doi.org/10.1107/S1600536809000956DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2968388PMC
January 2009

[GC-MS analysis of the fatty components of pollen Typhae before and after being carbonized].

Zhongguo Zhong Yao Za Zhi 2006 Feb;31(3):200-2

Beijing University of Chinese Medicine, Beijing 100102, China.

Objective: To study the changes of the fatty components of Pollen Typhae before and after being carbonized.

Method: Pollen Typhae and Pollen Typhae carbonisatus were extracted with petroleum ether (60-90 degrees C) respectively. The two kinds of extracts were analyzed by GC-MS after saponificated and methanolized, and their constituents were searched through NIST. The contents of the constituents were determined by method of normalization.

Result: Either in Pollen Typhae or in Pollen Typhae carbonisatus, 32 components were identified, among which 20 components were the same and 6 were different respectively. Among the same components, the relative contents of 3-methyl-2-butenoic acid-2-phenylethyl ester, hexanedioic acid-dimethyl ester, dimethyl phthalate, diethyl phthalate, diphenylamine, sebacic acid dimethyl ester, 1,2-benzenedicarboxylic acid, ethyl methyl ester, methyl-2-ethylhexyl phthalate and diisooctyl phthalate etc. increased obviously, and the relative contents of nonanedioic acid-dimethyl ester, diisobutyl phthalate and stigmastan-3,5-dien etc. decreased greatly. Among the different components, 8-hydroxy-octanoic acid-methyl ester, 9-hydroxy-nonanoic acid-methyl ester, 10-octadecenoic acid-methyl ester, m-hydroxycinnamic acid-methyl ester,3-[4-( acetyloxy)-3-methoxyphenyl]2-propenoic acid-methyl ester and 11-octadecenoic acid-methyl ester were detected in Pollen Typhae, 3-hydroxyspirost-8-en-11-one, benzenepropanoic acid-methyl ester, 2,4-dimethylhexanedioic acid; 2,4-bis (1,1-dimethylethyl)-phenol, undecanedioic acid-dimethyl ester and 9,10-dihydroxy-octadecanoic acid-methyl ester were detected in Pollen Typhae carbonistatus.

Conclusion: The species and contents of the fatty components in Pollen Typhae changed before and after being carbonized, but their chemical types didn't change too much.
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February 2006