Search results for: Hongji Zhu

Items from 1 to 14 out of 14 results

article

Two‐stage carbon distribution and cofactor generation for improving l‐threonine production of Escherichia coli

Jiaheng Liu, Huiling Li, Hui Xiong, Xixian Xie, more

Biotechnology and Bioengineering > 116 > 1 > 110 - 120

L‐Threonine, a kind of essential amino acid, has numerous applications in food, pharmaceutical, and aquaculture industries. Fermentative l‐threonine production from glucose has been achieved in Escherichia coli. However, there are still several limiting factors hindering further improvement of l‐threonine productivity, such as the conflict between cell growth and production, byproduct accumulation,...

article

Isolation and Purification of Antioxidant and ACE‐Inhibitory Peptides from Yak (Bos grunniens) Skin

Li Tian, Jiaheng Liu, Li Ma, Lei Zhang, more

Journal of Food Processing and Preservation > 41 > 5 > n/a - n/a

Yak (Bos grunniens) is a kind of cattle which can survive on Tibetan plateau. In addition, yak skin is an unused resource during production of meat. In this research, the potential angiotensin I‐converting enzyme (ACE)‐inhibitory and antioxidant bioactivities of yak skin gelatin hydrolysates (YSGH) were investigated. Orthogonal test was applied to optimize the pretreatment process. Then the gelatin...

article

Improving xylose utilization of defatted rice bran for nisin production by overexpression of a xylose transcriptional regulator in Lactococcus lactis

Jiaheng Liu, Zelin Ma, Hongji Zhu, Qinggele Caiyin, more

Bioresource Technology > 2017 > 238 > C > 690-697

Present investigation explores the potential of defatted rice bran (DRB) serving as sole carbon source and partial nitrogen source to support Lactococcus lactis growth and nisin production. To retain the nutrients in DRB, especially protein fractions, thermal pretreatment followed by enzymatic hydrolysis without washing step was applied for saccharification. A maximum of 45.64g reducing sugar mainly...

article

Promoting acid resistance and nisin yield of Lactococcus lactis F44 by genetically increasing D-Asp amidation level inside cell wall

Panlong Hao, Dongmei Liang, Lijie Cao, Bin Qiao, more

Applied Microbiology and Biotechnology > 2017 > 101 > 15 > 6137-6153

Nisin fermentation by Lactococcus lactis requires a low pH to maintain a relatively higher nisin activity. However, the acidic environment will result in cell arrest, and eventually decrease the relative nisin production. Hence, constructing an acid-resistant L. lactis is crucial for nisin harvest in acidic nisin fermentation. In this paper, the first discovery of the relationship between D-Asp amidation-associated...

article

Prediction and comparison of solar radiation using improved empirical models and Adaptive Neuro-Fuzzy Inference Systems

Ling Zou, Lunche Wang, Li Xia, Aiwen Lin, more

Renewable Energy > 2017 > 106 > C > 343-353

Solar radiation plays an important role in climate change, energy balance and energy applications. In this work, an Adaptive Neuro-Fuzzy Inference Systems (ANFIS) is proposed and compared with Expanded-Improved Bristow-Campbell Model (E-IBCM) and Improved Yang Hybrid Model (IYHM) to predict daily global solar irradiance (H_g) in China. The BCM is expanded by adding meteorological parameters and coefficients...

article

Estimation of global solar radiation using an artificial neural network based on an interpolation technique in southeast China

Ling Zou, Lunche Wang, Aiwen Lin, Hongji Zhu, more

Journal of Atmospheric and Solar-Terrestrial Physics > 2016 > 146 > C > 110-122

Solar radiation plays important roles in energy application, vegetation growth and climate change. Empirical relations and machine-learning methods have been widely used to estimate global solar radiation (GSR) in recent years. An artificial neural network (ANN) based on spatial interpolation is developed to estimate GSR in southeast China. The improved Bristow–Campbell (IBC) model and the improved...

article

Estimation of atmospheric turbidity coefficient β over Zhengzhou, China during 1961–2013 using an improved hybrid model

Aiwen Lin, Ling Zou, Lunche Wang, Wei Gong, more

Renewable Energy > 2016 > 86 > C > 1134-1144

Accurate measurement and determination of the atmospheric turbidity is of great importance for solar radiation modeling and climate change studies. Daily values of global, direct and diffuse solar irradiation and meteorological variables (air temperature, relative humidity, sunshine duration and wind speed) during 1960–2013 are used to investigate the monthly variations of Ångström turbidity coefficient...

article

Long-term variations of estimated global solar radiation and the influencing factors in Hunan province, China during 1980–2013

Ling Zou, Aiwen Lin, Lunche Wang, Xiangao Xia, more

Meteorology and Atmospheric Physics > 2016 > 128 > 2 > 155-165

Long-term variation of estimated global solar radiation (E _g↓) and its relationship with total cloud cover (TCC), low cloud cover (LCC), water vapor content (WVC) and aerosol optical depth (AOD) were investigated based on the observations at 21 meteorological stations in Hunan province, China. Long-term variations of all variables were calculated for each station; the Mann–Kendall trend...

article

Giant Congenital Left Atrial Appendage Aneurysm

Hanjiang Zeng, Jianqun Yu, Zhongzi Xu, Yi Luo, more

Journal of Cardiac Surgery > 30 > 8 > 646 - 647

article

Production and purification of antioxidant peptides from flatfish skin protein hydrolysates

Hongji Zhu, Shipeng Wang, Li Tian, Hua Zhang

Transactions of Tianjin University > 2015 > 21 > 5 > 433-439

Antioxidant peptides of flatfish skin protein hydrolyzed by four enzymes(Papain, Pepsin, Trypsin and Neutrase, respectively)were investigated. The Trypsin hydrolysate obtained by hydrolysis exhibited the highest 1,1-dipheny-l-2-picrylhydrazyl(DPPH)radical scavenging activity(DRSA)compared with other hydrolysates. Response surface method ology(RSM), based on Box-Behnken design, was used to study the...

article

Immobilization of Streptomyces thermotolerans 11432 on polyurethane foam to improve production of Acetylisovaleryltylosin

Hongji Zhu, Weihua Wang, Jiaheng Liu, Qinggele Caiyin, more

Journal of Industrial Microbiology & Biotechnology > 2015 > 42 > 1 > 105-111

In this study, polyurethane foam (PUF) was chemically treated to immobilize Streptomyces thermotolerans 11432 for semi-continuous production of acetylisovaleryltylosin (AIV). Based on experimental results, positive cross-linked PUF (PCPUF) was selected as the most effective carrier according to immobilized cell mass. The effect of adsorption time on immobilized mass was investigated. AIV concentration...

article

Investigation of hydrolysis conditions and properties on protein hydrolysates from flatfish skin

Hua Zhang, Hongji Zhu, Shipeng Wang, Weihua Wang

Frontiers of Chemical Science and Engineering > 2013 > 7 > 3 > 303-311

Response surface method (RSM), based on Box-Behnken design, was used to optimize the enzymatic hydrolysis conditions of flatfish skin protein hydrolysates (FSPH). Among the tested proteases, the combination of nutrase and trypsin was selected. The optimal hydrolysis conditions were as follows: pH 7.3, temperature 51.8°C, and the enzyme/substrate (E/S) ratio 2.5; under these conditions, the maximum...

article

Extraction, purification and antibacterial activities of a polysaccharide from spent mushroom substrate

Hongji Zhu, Kai Sheng, Erfu Yan, Jianjun Qiao, more

International Journal of Biological Macromolecules > 2012 > 50 > 3 > 840-843

To contribute towards effective exploitation and utilization of spent mushroom substrate (SMS), a water-soluble polysaccharide named PL was isolated and purified from SMS. The total sugar content and monosaccharide composition were analyzed by phenol–sulfuric acid method and capillary electrophoresis, and infrared spectroscopy was also performed for structure characterization. The results showed that...

article

Optimization of the main liming process for inulin crude extract from Jerusalem artichoke tubers

Huandong Li, Hongji Zhu, Jianjun Qiao, Junhu Du, more

Frontiers of Chemical Science and Engineering > 2012 > 6 > 3 > 348-355

A three-stage homogenate extraction was used as a new method for inulin extraction from Jerusalem artichoke tubers. Compared with the results from conventional hot water extraction, the three-stage homogenate extraction gave higher yields and caused less degradation of the inulin. The inulin crude extract was then clarified by a carbonate-precipitation method, during which three variables — the quicklime...

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Keywords

FLATFISH SKIN (2)
GLOBAL SOLAR RADIATION (2)
YANG HYBRID MODEL (2)
STREPTOMYCES THERMOTOLERANS (1)
ACETYLISOVALERYLTYLOSIN (1)
ACID RESISTANCE (1)
ADAPTIVE NEURO-FUZZY INFERENCE SYSTEMS (1)
ANTIBACTERIAL ACTIVITY (1)
ANTIOXIDANT PEPTIDES (1)
ARTIFICIAL NEURAL NETWORK (1)
BRISTOW-CAMPBELL MODEL (1)
CARBON DISTRIBUTION (1)
CELL WALL REMODELING (1)
CHINA (1)
CLEARNESS INDEX (1)
COFACTOR GENERATION (1)
D-ASP AMIDATION (1)
DEFATTED RICE BRAN (1)
EMPIRICAL MODELS (1)
ENZYMATIC HYDROLYSIS (1)
ESCHERICHIA COLI (1)
GEL PERMEATION CHROMATOGRAPHY (1)
GLOBAL SOLAR IRRADIANCE PREDICTION (1)
HOMOGENATE EXTRACTION (1)
IMMOBILIZATION (1)
INULIN (1)
JERUSALEM ARTICHOKE (1)
LACTOCOCCUS LACTIS (1)
L‐THREONINE (1)
MAIN LIMING PROCESS (1)
METABOLIC ENGINEERING (1)
METAL CHELATING ACTIVITY (1)
NISIN (1)
NISIN ADSORPTION (1)
NISIN YIELD (1)
OPTIMIZATION (1)
PG CROSS-LINKAGE (1)
POLYSACCHARIDE (1)
POLYURETHANE FOAM (1)
PROTEIN HYDROLYSATES (1)
PURIFICATION (1)
REDUCING POWER (1)
REPEATED BATCH FERMENTATION (1)
SPATIAL INTERPOLATION (1)
SPENT MUSHROOM SUBSTRATE (1)
XYLOSE UTILIZATION (1)
XYLR (1)
ZHENGZHOU (1)
ÅNGSTRÖM TURBIDITY COEFFICIENT (1)
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Springer (6)
Elsevier (5)
Wiley (3)

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Search results for: Hongji Zhu

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