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11 results on '"Shu-Feng Bi"'

3. Chemical composition and antioxidant activities of the essential oil fromNandina domesticafruits

Author

Ling Fang, Jie Wu, Yong-Zhan Lv, Shu-Feng Bi, Zhong-Kang Li, and Guang-Qi Zhu

Subjects
Vinyl Compounds, Antioxidant, DPPH, Acyclic Monoterpenes, medicine.medical_treatment, Drug Evaluation, Preclinical, Plant Science, Furfural, 01 natural sciences, Biochemistry, Antioxidants, Analytical Chemistry, law.invention, Inhibitory Concentration 50, chemistry.chemical_compound, Picrates, Linalool, Superoxides, law, Oils, Volatile, medicine, Organic chemistry, Food science, Essential oil, ABTS, biology, 010405 organic chemistry, Biphenyl Compounds, Guaiacol, Organic Chemistry, Berberidaceae, biology.organism_classification, 0104 chemical sciences, 010404 medicinal & biomolecular chemistry, Oleic acid, Nandina, chemistry, Fruit, Monoterpenes, Hexanols
Abstract

The chemical composition and antioxidant activities of the essential oil from Nandina domestica fruits were studied for the first time. Twenty-two compounds, representing 82.79% of the oil, were identified from the oil. The major compounds were 3-hexen-1-ol (12.9%), linalool (12.3%), 2-methoxy-4-vinylphenol (9.9%), oleic acid (8.0%), furfural (5.8%) and 2,6-di-tert-butyl-4-methylphenol (5.7%). The antioxidant activities of the oil were evaluated using reducing power, metal chelating ability and scavenging capacity against 1,1-diphenyl-2-picrylhydrazyl (DPPH), 2,2'-azinobis-3-ethylbenzthiazoline-6-sulfonate (ABTS) and superoxide anion free radical. The oil exhibited significant antioxidant activities.

Published
2015

4. New Ansamycin Derivatives Generated by Simultaneous Mutasynthesis

Author

Rui Hua Jiao, Rong Jiang, Ai Hua Zhang, Shu Feng Bi, Huan Dou, Ya Yi Hou, Guo Yan Zhao, Ya Nan Song, Ren-Xiang Tan, Wen Jing Zhang, and Hui Ming Ge

Subjects
Molecular Structure, Stereochemistry, Chemistry, Lactams, Macrocyclic, Ansamycin, Organic Chemistry, Antineoplastic Agents, Hep G2 Cells, Streptomyces seoulensis, Biochemistry, Streptomyces, Rifabutin, MCF-7 Cells, Humans, Drug Screening Assays, Antitumor, Physical and Theoretical Chemistry, Cytotoxicity, Ansamycins
Abstract

The conversion from triene- to diene-typed ansamycins is clarified step by step in Streptomyces seoulensis IFB-A01. Such an intertype convertibility is adopted to establish for the first time the simultaneous mutasynthesis of both types of C17-benzene ansamycins (C17BAs). Three of the newly generated unnatural compounds showed potent cytotoxicity.

Published
2015

5. New alkaloid fromStreptomyces koyangensisresiding inOdontotermes formosanus

Author

Zhi-Kai Guo, Shu-Feng Bi, Ren-Xiang Tan, Hui Ming Ge, Nan Jiang, and Rui-Hua Jiao

Subjects
Staphylococcus aureus, Circular dichroism, Streptococcus pyogenes, Stereochemistry, Ethyl acetate, Pharmaceutical Science, Isoptera, Microbial Sensitivity Tests, Biology, Analytical Chemistry, chemistry.chemical_compound, Alkaloids, Candida albicans, Drug Discovery, Escherichia coli, Animals, Nuclear Magnetic Resonance, Biomolecular, Pharmacology, Molecular Structure, Odontotermes formosanus, Circular Dichroism, Alkaloid, Organic Chemistry, Streptomyces koyangensis, Indolizines, General Medicine, Antimicrobial, Streptomyces, Micrococcus luteus, Complementary and alternative medicine, chemistry, Pseudomonas aeruginosa, Cryptococcus neoformans, Molecular Medicine, Aspergillus niger, Bacillus subtilis
Abstract

A new alkaloid was isolated from the ethyl acetate extract of the culture of a termite-associated Streptomyces koyangensis BY-4. The structure of 1 was elucidated by using MS, NMR, electronic circular dichroism data, and computational approaches. Compound 1 showed weak antimicrobial activities against a panel of test microbes.

Published
2013

6. New ansamycin analogues from the mutant strain of Streptomyces seoulensis

Author

Ren-Xiang Tan, Shu-Feng Bi, Wen-Jing Zhang, Ya-Nan Song, Rui-Hua Jiao, and Hui Ming Ge

Subjects
Pharmacology, Antifungal, medicine.drug_class, Stereochemistry, Antiparasitic, Ansamycin, Biology, Streptomyces seoulensis, Streptomyces, Anti-Bacterial Agents, Cell Line, Beta-lactam, chemistry.chemical_compound, Mice, Biochemistry, Biosynthesis, chemistry, Rifabutin, Mutant strain, Cell Line, Tumor, Drug Discovery, medicine, Animals, Humans
Published
2015

7. Composition and Antioxidant Activities of the Essential Oil from the Flowers of Nerium indicum

Author

Guang-Qi Zhu, Jie Wu, Han-kui Wu, Zhong-Kang Li, Ling Fang, and Shu-Feng Bi

Subjects
Antioxidant, Traditional medicine, 010405 organic chemistry, Chemistry, medicine.medical_treatment, Plant Science, General Chemistry, 01 natural sciences, General Biochemistry, Genetics and Molecular Biology, 0104 chemical sciences, law.invention, 010404 medicinal & biomolecular chemistry, Nerium indicum, law, medicine, Composition (visual arts), Essential oil
Published
2016

8. [GC-MS analysis of chemical constituents of volatile oil from flowers of Rhododendron mucronatum]

Author

Tong-Bin, Liu, Ming-Yue, Pan, Xue-Feng, Ling, Yun, Zhang, Chang, Zhang, and Shu-Feng, Bi

Subjects
Steam, Hot Temperature, Rhododendron, Molecular Structure, Phytol, Terpenes, Alkanes, Oils, Volatile, Flowers, Benzoates, Gas Chromatography-Mass Spectrometry
Abstract

To analyze the chemical constituents of volatile oil from flowers of Rhododendron mucronatum.The volatile oil was extracted by water-steam distillation and analyzed by GC-MS.Forty-nine compounds, which occupied 79.55% of total constituents, were identified. The major constituents were linalool, beta-eudesmene, phytol, benzyl benzoate, benzyl salicylate and nonyl aldehyde.The chemical constituents of volatile oil, which contain many bioactive constituents, are mainly composed of terpenes, esters, and alkanes.

Published
2014

11. New acrylamide and oxazolidin derivatives from a termite-associated Streptomyces sp

Author

Ren-Xiang Tan, Fang Li, Yong Chun Song, Hui Ming Ge, and Shu Feng Bi

Subjects
Spectrometry, Mass, Electrospray Ionization, Magnetic Resonance Spectroscopy, Spectrophotometry, Infrared, Stereochemistry, Antineoplastic Agents, Plant Science, Isoptera, Microbial Sensitivity Tests, Streptomyces, chemistry.chemical_compound, Piperidines, Drug Discovery, Animals, Pyrroles, Dihydrostreptazolin, Oxazoles, Pharmacology, Acrylamides, Odontotermes formosanus, biology, General Medicine, Nuclear magnetic resonance spectroscopy, biology.organism_classification, Antimicrobial, Anti-Bacterial Agents, Complementary and alternative medicine, Biochemistry, chemistry, Acrylamide, Fermentation, Spectrophotometry, Ultraviolet, Drug Screening Assays, Antitumor, Two-dimensional nuclear magnetic resonance spectroscopy
Abstract

Two new compounds, named 2-formylpyrrole-4-acrylamide (1) and dihydrostreptazolin (2) were isolated from the fermentation broth of BY-4, an actinomycetes residing in the gut of Odontotermes formosanus. The structures of 1 and 2 were elucidated by extensive spectral analysis (1H, 13C, 2D NMR, and HRESIMS). The isolated compounds were assayed for cytotoxic and antimicrobial activities.

Published
2011

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