许正宏
[1] 工业微生物资源及其产品开发。[2] 微生物代谢工程。[3] 微生物制药。
个性化签名
- 姓名:许正宏
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师, 教育部“新世纪优秀人才支持计划”入选者
- 职称:-
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学科领域:
物理海洋学
- 研究兴趣:[1] 工业微生物资源及其产品开发。[2] 微生物代谢工程。[3] 微生物制药。
许正宏,1971.07出生。江南大学医药学院教授,副院长,发酵工程专业博士生导师。
学习经历:2001.2-2005.3 江南大学发酵工程专业,工学博士;1993.9-1996.6 山东大学细胞生物学专业,理学硕士;1989.9-1993.6 无锡轻工业学院发酵工程专业,工学学士。
工作经历:2007.6- 江南大学医药学院 教授,副院长;2001.3-2007.6 江南大学生物工程学院 讲师、副教授、教授;1996.7-2001.2 无锡轻工大学生物工程学院,助教、讲师;1999.10-2000.9 日本大阪大学应用生物工学专业,访问研究。
学术及社会兼职:中国生物工程学会糖生物工程专业委员会委员;中国微生物学会永久会员。
研究领域:[1] 工业微生物资源及其产品开发:包括工业微生物新资源及其产物的过量合成及工业应用基础研究,传统发酵工艺过程机理解析及优化。[2] 微生物代谢工程:主要以氨基酸代谢研究为基础,结合微生物生理状态的解析、代谢流量分析以及代谢途径重构等手段实现产物的过量合成。[3] 微生物制药:长效基因工程药物的研发,药用真菌深层液态发酵及其生物活性物质的研究。
科研成果及奖励:近5年来,发表科研论文60余篇,申请国家发明专利10余项,鉴定或验收成果10余项。先后获得国家重大新药创制专项、973、863以及教育部新世纪优秀人才支持计划资助, 被授予江苏省“九五”产学研联合先进个人,江苏省新长征突击手等荣誉称号。
个人主页:http://yyxy.jiangnan.edu.cn/content/teachers/professor/Xuzhenghong.htm
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335
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成果数
7
许正宏, Hong Xua, Wenfang Doub, Hongyu Xua, Xiaomei Zhanga, Zhiming Raob, Zhongping Shib, Zhenghong Xua, b, *
Biochemical Engineering Journal 43(2009)41-51,-0001,():
-1年11月30日
In this study, the metabolic flux distribution analysis of a new l-arginine (Arg) overproducing strain, Corynebacterium crenatum, was carried out under various oxygen supply conditions in order to explore the optimized oxygen supply profile. The metabolic flux analysis indicated that a relatively higher larginine production could be obtained under high oxygen supply (HOS) condition overall. However, during the late fermentation phases, a much more stable l-arginine production could be rather achieved under medium oxygen supply (MOS) condition. As a result, a two-stage oxygen supply strategy, which maintained HOS condition during early fermentation phase, and then step-wisely reduced agitation to keep a stable, smooth and moderate dissolve oxygen levels (DO) changing profile throughout the production phases, was proposed. With the proposed control strategy, the final l-arginine concentration of the batch fermentationwas largely increased and reached to a high level of 36.6 g L−1, whichwas 16% and 51% higher than those obtained under the HOS and MOS conditions. The two-stage oxygen supply strategy could also accelerate glucose consumption rate and thus shorten fermentation time under the same batch initial fermentation condition. The relevant metabolic flux analysis verified the effectiveness of the proposed control strategy.
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【期刊论文】Niuchangchih (Antrodia camphorata) and its potential in treating liver diseases
许正宏
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-1年11月30日
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许正宏, Zhenghong Xua, b, Lei Lic, ZhisongShen d, *
Water Research 39(2005)2189-2195,-0001,():
-1年11月30日
Praziquantel is an anti-schistosoma drug, its wastewater contains numerous cyanide and other colloid pollutant. A novel integrated treatment process was proposed in this study, i.e., using coagulation to eliminate colloid pollutant and using gas membrane absorption (GMA) to remove cyanide. The optimization of coagulation condition, determination of cyanide removal rate, elimination of membrane fouling, and overall evaluation of the integrated process for the treatment of praziquantel wastewater were investigated in this study. Good results were achieved: turbidity reduced from 700NTU to 10-40 NTU, 92% COD was removed, cyanide concentration dropped from 3500mg/L to below 0.5mg/L, recovery rate of cyanide reached to 98%, and operation cost could be entirely compensated from the gain of recovered cyanide. The results demonstrate that the novel integrated process offers a number of advantages over alkaline chlorination method in the treatment of praziquantel wastewater: cyanide can be reused rather than destroyed, no secondary pollutants are produced, the operation cost is low and the equipment etchingis avoided.
Membrane absorption, Coagulation, Cyanide, Praziquantel, Wastewater treatment
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许正宏, F.J. Cui a, Y. Li a, Z.H. Xu b, H.Y. Xu b, K. Sun b, W.Y. Tao a, b, *
Bioresource Technology 97(2006)1209-1216,-0001,():
-1年11月30日
In this work, a three-level Box–Behnken factorial design was employed combining with response surface methodology (RSM) to optimize the medium composition for the production of the mycelial biomass and exo-polymer in submerged cultures by Grifola frondosa GF9801. A mathematical model was then developed to show the effect of each medium composition and their interactions on the production of mycelial biomass and exo-polymer. The model estimated that, a maximal yield of mycelial biomass (17.61g/l) could be obtained when the concentrations of glucose, KH2PO4, peptone were set at 45.2g/l, 2.97g/l, 6.58g/l, respectively; while a maximal exo-polymer yield (1.326g/l) could be achieved when setting concentrations of glucose, KH2PO4, peptone at 58.6g/l, 4.06g/l and 3.79g/l, respectively. These predicted values were also verified by validation experiments. Compared with the values obtained by other runs in the experimental design, the optimized medium resulted in a significant increase in the yields of mycelial biomass and exo-polymer. Maximum mycelial biomass yield of 22.50g/l was achieved in a 15-l fermenter using the optimized medium.
Grifola frondosa, Submerged culture, Medium optimization, Response surface methodology, Box–Behnken design
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许正宏, F.J. Cui a, b, W.Y. Tao a, *, Z.H. Xu b, W.J. Guo b, H.Y. Xu b, Z.H. Ao b, J. Jin b, Y.Q. Wei a
Bioresource Technology 98(2007)395-401,-0001,():
-1年11月30日
A 21-kDa heteropolysaccharide, coded as GFPS1b, was obtained from the cultured mycelia of Grifola frondosa GF9801 by hot-water extraction, ethanol precipitation, and fractioned by DEAE Sepharose Fast-flow, followed by the purification with Sephadex G-100 column chromatography using an AKTA purifier. It exhibited more potent anti-proliferative activity on MCF-7 cells than other polysaccharide fractions. GFPS1b was an acidic polysaccharide with approximately 16.60% protein and 4.3% uronic acid. Gas chromatography of absolute acid hydrolysate of GFPS1b suggested that it was composed of D-glucose, D-galactose, and L-arabinose with a molar ratio of 4:2:1. Periodate oxidation, Smith degradation, partial acid hydrolyzation, methylation analysis, FT-IR, and 1H, 13C NMR spectroscopy analysis revealed that GFPS1b had a backbone consisting of a-(114)-linked D-galacopyranosyl and a-(1→3)-linked D-glucopyranosyl residues substituted at O-6 with glycosyl residues composed of a-L-arabinose-(1→4)-a-D-glucose (1→ linked residues.
Grifola frondosa, Heteropolysaccharide, Structure analysis, Anti-tumor activity
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许正宏, Shan-shan Lin &Wen-fang Dou & Hong-yu Xu & Hua-zhong Li & Zheng-Hong Xu & Yan-he Ma
Appl Microbiol Biotechnol (2007) 75: 1015-1022,-0001,():
-1年11月30日
Abstract In this work, a 22 factorial design was employed combining with response surface methodology (RSM) to optimize the medium compositions for the production of alkaline β-mannanase by alkaliphilic Bacillus sp. N16-5 isolated previously from sediment of Wudunur Soda Lake in Inner Mongolia, China. The central composite design (CCD) used for the analysis of treatment combinations showed that a second-order polynomial regression model was in good agreement with experimental results, with R2=0.9829 (P<0.05). The maximum activity was obtained at NaCl concentration (84.4g l−1) and sodium glutamate (3.11g l−1) and a high medium pH around 10.0. Under such conditions, the activity of alkaline β-mannanase achieved 310.1U/ml in the scale of 5-l fermenter, which was increased nearly twice compared with the original. Through optimization, the substrates shifted from the expensive substrates, such as locust bean gum and peptone, to the inexpensive ones such as konjac powder, soymeal, and sodium glutamate. The experiment results also suggested that the environmental conditions of high salinity and high alkalinity, as well as the inducer substrates, play very important roles in the production of the alkaline β-mannanase by alkaliphilic Bacillus sp. N16-5.
Alkaliphilic Bacillus sp., Alkaline β-mannanase., Optimization., Response surface methodology
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许正宏, Jun-En Suna, Zong-Hua Aoa, ∗, Zhen-Ming Lub, Hong-Yu Xua, Xiao-Mei Zhanga, Wen-Fang Doua, Zheng-Hong Xua, b, ∗∗
Journal of Ethnopharmacology 118(2008)7-13,-0001,():
-1年11月30日
Aim of the study: The antihyperglycemic and antilipidperoxidative effects of the dry matter of culture broth (DMCB) of Inonotus obliquus were investigated. Materials and methods: The normal, glucose-induced hyperglycemic and alloxan-induced diabetic mice were used to evaluate the antihyperglycemic and antilipidperoxidative effects of the DMCB of Inonotus obliquus. Results: Treatment with the DMCB (500 and 1000 mg/kg body weight) exhibited a mild hypoglycemic effect in normal mice, and failed to reduce the peak glucose levels after glucose administration. However, euglycemiawas achieved in the DMCB of Inonotus obliquus (1000 mg/kg) and glibenclamide-treated mice after 120 min of glucose loading. In alloxan-induced diabetic mice, the DMCB (500 and 1000 mg/kg body weight for 21 days) showed a significant decrease in blood glucose level, the percentages reduction on the 7th day were 11.90 and 15.79%, respectively. However, feeding of this drug for 3 weeks produced reduction was 30.07 and 31.30%. Furthermore, the DMCB treatment significantly decreased serum contents of free fatty acid (FFA), total cholesterol (TC), triglyceride (TG) and low density lipoprotein-cholesterol (LDLC), whereas effectively increased high density lipoprotein-cholesterol (HDL-C), insulin level and hepatic glycogen contents in liver on diabetic mice. Besides, the DMCB treatment significantly increased catalase (CAT), superoxide dismutase (SOD) and glutathione peroxidase (GPx) activities except for decreasing maleic dialdehyde (MDA) level in diabetic mice. Histological morphology examination showed that the DMCB restored the damage of pancreas tissues in mice with diabetes mellitus. Conclusions: The results showed that the DMCB of Inonotus obliquus possesses significant antihyperglycemic, antilipidperoxidative and antioxidant effects in alloxan-induced diabetic mice.
Inonotus obliquus Diabetes Antihyperglycemic Antilipidperoxidative Antioxidant
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