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Full-Text Articles in Food Biotechnology
Preparation Process , Antioxidant Activity , And Fruit Preservation Application Of Polygonatum Sibiricum Polysaccharides With Low Relative Molecular Mass, Hu Chengzhi, Ma Yanli, Shen Qingshan, Li Mengna, Li Mi, Fei Peng
Preparation Process , Antioxidant Activity , And Fruit Preservation Application Of Polygonatum Sibiricum Polysaccharides With Low Relative Molecular Mass, Hu Chengzhi, Ma Yanli, Shen Qingshan, Li Mengna, Li Mi, Fei Peng
Food and Machinery
[Objective] To compare the effects of four pretreatment methods—hot pressing (HP), steam explosion (SE), ultrasound (US), and solid-state fermentation (SF)—on the structural characteristics and antioxidant activities of Polygonatum sibiricum polysaccharides (PSP), and to explore the potential application of PSP in fruit preservation. [Methods] Ten PSP samples are prepared. The yield, relative molecular mass, functional groups, thermal stability, surface morphology, and DPPH·, ABTS·, and OH· free radical scavenging abilities of the samples are determined. The PSP sample with low relative molecular mass obtained by SE treatment is loaded with Zn2+ to prepare a sprayable hydrogel, which is then applied in the …
Effects Of Extraction Methods On The Composition And Physicochemical Properties Of Flavonoids From Lycium Barbarum Leaves, Li Juanxia, Li Jianxin, Gao Jianying, Mai Wenting, Fan Yanli, Ma Jinchao, Meng Xuemei
Effects Of Extraction Methods On The Composition And Physicochemical Properties Of Flavonoids From Lycium Barbarum Leaves, Li Juanxia, Li Jianxin, Gao Jianying, Mai Wenting, Fan Yanli, Ma Jinchao, Meng Xuemei
Food and Machinery
[Objective] To investigate the effects of different extraction methods on the efficacy, chemical composition, and functional group characteristics of flavonoids in Lycium barbarum leaves. [Methods] This study comparatively analyzes the effects of three methods - ultrasound-assisted ethanol extraction (UAE), microwave-assisted ethanol extraction (MAE), and aqueous two-phase system (ATPS) - on the yield, composition, and in vitro antioxidant activity of flavonoids from L. barbarum leaves. [Results] UAE and MAE achieve the highest yield of flavonoids from dried L. barbarum leaves. The main components are rutin, quercetin, chlorogenic acid, and kaempferol. The antioxidant capacity of the flavonoid extract from dried L. barbarum …
Extraction Optimization For Polyphenols From Clausena Anisum-Olens Kernel , As Well As Their Antioxidant And Antibacterial Activities, Liao Jianhong, Su Xiufang, Zheng Guangjin, Li Ganghui
Extraction Optimization For Polyphenols From Clausena Anisum-Olens Kernel , As Well As Their Antioxidant And Antibacterial Activities, Liao Jianhong, Su Xiufang, Zheng Guangjin, Li Ganghui
Food and Machinery
[Objective] To optimize the extraction process of polyphenols from Clausena anisum-olens kernel, and to analyze their in vitro antioxidant and antibacterial activities. [Methods] With ultrasonic temperature, power, time, as well as solid–liquid ratio and ethanol volume fraction as experimental factors, the response surface method was employed to optimize the ultrasonic extraction process of polyphenols from C. anisum-olens kernel. Furthermore, the in vitro antioxidant activity of the polyphenols was investigated via free radical scavenging assays, and the antibacterial activity was determined using the well diffusion method. [Results] The optimal extraction process is an ultrasonic power of 94 W, an ultrasonic time …
Ultrasound-Assisted Dual-Enzyme Extraction Condition Optimization And Antioxidant Activity Evaluation Of Anthocyanins From Perilla Leaves, Wenting Zhu, Shiyun Wang, Qiaolin Zhu, Qi Cao, Yixin Zhang, Tianran Hong
Ultrasound-Assisted Dual-Enzyme Extraction Condition Optimization And Antioxidant Activity Evaluation Of Anthocyanins From Perilla Leaves, Wenting Zhu, Shiyun Wang, Qiaolin Zhu, Qi Cao, Yixin Zhang, Tianran Hong
Journal of Food Science and Biotechnology
[Objective ] This study aims to comprehensively develop perilla and improve its utilization value.[Method ] Using perilla leaves as raw material,the effects of solid-liquid ratio,ethanol volume fraction,ultrasonic time,and enzymatic hydrolysis time on the mass fraction of anthocyanins in perilla leaves were studied.The ultrasound-assisted dual-enzyme extraction conditions for anthocyanins from perilla leaves were optimized by the response surface method.The antioxidant activity and phenol mass fraction of anthocyanins from perilla leaves were determined,and the main phenols were analyzed by chromatography.[Result ] The optimal extraction conditions of anthocyanins from perilla leaves were solid-liquid ratio of 1 g∶16 mL,ethanol volume fraction of 74%,ultrasonic time …
Effects Of Shaping And Baking Processes On The Antioxidant Activity Of Round Roasted Green Tea, Jun Liu, Gong Feng, Rong Tan, Weihong Huang
Effects Of Shaping And Baking Processes On The Antioxidant Activity Of Round Roasted Green Tea, Jun Liu, Gong Feng, Rong Tan, Weihong Huang
Journal of Food Science and Biotechnology
[Objective ] This study investigated the effects of shaping and baking processes on the antioxidant activity of round roasted green tea,aiming to provide theoretical support and practical reference for improving the quality and optimizing the processing techniques of green tea.[Method ] The influences of different processing stages and key procedures such as shaping and baking on the antioxidant activity of round roasted green tea were studied.A zebrafish model (in vivo ) and multiple indexes including DPPH radical scavenging rate,ABTS ⁺ radical scavenging rate,and ferric ion reducing antioxidant power (FRAP ) were employed for comprehensive evaluation of the antioxidant activity.[Result ] …
Effects Of Low-Pressure Electrostatic Field-Assisted Freezing At Different Field Strengths On The Quality Of Sea Buckthorn Leaves, Xiaoyue Dong, Tongliga Dong, Jinwei Te, Xiukuan Wang, Qian Hao, Meishu Miao, Xueyan Yun
Effects Of Low-Pressure Electrostatic Field-Assisted Freezing At Different Field Strengths On The Quality Of Sea Buckthorn Leaves, Xiaoyue Dong, Tongliga Dong, Jinwei Te, Xiukuan Wang, Qian Hao, Meishu Miao, Xueyan Yun
Journal of Food Science and Biotechnology
[Objective ] This study aimed to investigate the effects of different freezing preservation techniques on the quality of sea buckthorn (Hippophae rhamnoides ) leaves.[Method ] A low-voltage electrostatic field (LVEF ) pretreatment was applied during the freezing process of sea buckthorn leaves,and its effects on freezing characteristics and bioactive compound retention were evaluated.Field strengths at 0,20,40,and 60 cm from the discharge plate were compared with conventional freezing in terms of freezing rate,water loss rate,bioactive compound retention rate,and antioxidant activity of sea buckthorn leaves.The optimized and conventionally frozen leaves were subsequently used to prepare sea buckthorn leaf yogurt,with plain yogurt (NY) …
Mechanisms Of Antioxidant Activity Of Lactic Acid Bacteria And Its Application In Oxidative Stress-Related Diseases, Yixiao Shao, Chuang Huang, Chenjian Liu, Xiaoran Li
Mechanisms Of Antioxidant Activity Of Lactic Acid Bacteria And Its Application In Oxidative Stress-Related Diseases, Yixiao Shao, Chuang Huang, Chenjian Liu, Xiaoran Li
Journal of Food Science and Biotechnology
The antioxidant properties of lactic acid bacteria are related to various probiotic activities,which can prevent and alleviate a variety of chronic diseases caused by oxidation in the host.The antioxidant mechanisms of lactic acid bacteria,including the action mechanisms of antioxidant enzymes and non-enzymatic antioxidants and regulation of host signaling pathways,were expounded.Furthermore,the application status of antioxidant properties of lactic acid bacteria in diseases of the nervous system,digestive system,and skin system were summarized.The aim is to explore how to enhance the antioxidant activity of lactic acid bacteria in oxidative stress-related diseases and give new insights into the development of related treatment strategies.
Optimization Of The Preparation Process And Antioxidant Activity Analysis Of Blueberry Juice By Wet Ultrafine Grinding Process And Compound Enzymolysis Method, He Wanying, Dan Li, Zhao Liangzhong, Huang Zhanrui, Long Zhanqian
Optimization Of The Preparation Process And Antioxidant Activity Analysis Of Blueberry Juice By Wet Ultrafine Grinding Process And Compound Enzymolysis Method, He Wanying, Dan Li, Zhao Liangzhong, Huang Zhanrui, Long Zhanqian
Food and Machinery
Objective: This study aimed to optimize the preparation process of blueberry juice and improve its antioxidant activity. Methods: Blueberry juice was prepared using a wet ultrafine grinding process and compound enzymolysis method. Response surface methodology was used to optimize the process parameters and analyze the antioxidant activity of blueberry juice. Results: There were significant differences in the juice yield and active substance content of blueberry juice under different solid-liquid ratios, crushing times, compound enzyme contents, and enzymatic hydrolysis times, with enzymatic hydrolysis time having the most significant impact on juice yield and anthocyanin content. The optimal process parameters for the …
Enzymatic Hydrolysis Preparation And Activity Analysis Of Antioxidant Peptides Derived From Walnut Dregs, Ni Ce, Cao Tianhong, Chen Min, Yu Xun, Wu Hao, Wen Li
Enzymatic Hydrolysis Preparation And Activity Analysis Of Antioxidant Peptides Derived From Walnut Dregs, Ni Ce, Cao Tianhong, Chen Min, Yu Xun, Wu Hao, Wen Li
Food and Machinery
Objective: This study focused on the identification and activity analysis of antioxidant active peptides in walnut dregs protein hydrolysates. Methods: Protein was extracted from walnut meal by fractionation method, and five kinds of proteolytic enzymes, including trypsin, papain, neutral protease, alkaline protease and flavor protease, were used to hydrolyze the proteins. The antioxidant activity of trypsin hydrolysate （TH）, papain hydrolysate （PH）, dispase hydrolysate （DH）, alcalase hydrolysate （AH） and flavourzyme hydrolysate （FPH） were evaluated and compared. The in vitro antioxidant activity of different concentrations of AH was determined by the detection indexes of DPPH free radical scavenging rate, ABTS free radical …
Optimization Of The Preparation Process For Propolis Liposome And Antioxidant Activity Analysis, Sun Siyuan, Kong Lingjie, Zhu Hequan, Dong Jie
Optimization Of The Preparation Process For Propolis Liposome And Antioxidant Activity Analysis, Sun Siyuan, Kong Lingjie, Zhu Hequan, Dong Jie
Food and Machinery
[Objective] This study aimed to improve the water solubility of propolis, and expand the application of propolis in food industry. [Methods] By utilizing the film dispersion method, propolis liposome was prepared with cholesterol and soy lecithin as the wall material and propolis as the core component. The optimal preparation process for propolis liposome was optimized through a combination of one-factor experiments and response surface methodology with the encapsulation rate as the test index, and its antioxidant activity was also analyzed and evaluated. [Results] The optimal process for preparing propolis liposome consisted of 2.5 g/100 mL soy lecithin, a cholesterol to …
A Study On Extraction Of Volatile Oil From Green Orange Peel By Reduced-Pressure Steam Distillation And In Vitro Antioxidant Activity, Li Guijuan, Zhao Huiping, Xiao Yezhi, Gan Wencheng, Fan Siqi
A Study On Extraction Of Volatile Oil From Green Orange Peel By Reduced-Pressure Steam Distillation And In Vitro Antioxidant Activity, Li Guijuan, Zhao Huiping, Xiao Yezhi, Gan Wencheng, Fan Siqi
Food and Machinery
[Objective] This study aimed to develop a method for extracting volatile oil from green-orange peel by reduced-pressure steam distillation. [Methods] A volatile oil tester was combined with a vacuum device for the extraction of volatile oil from green-orange peel, and a regulating valve in the device controlled the vacuum level. The composition and content of volatile oil under reduced pressure and atmospheric pressure were determined by gas chromatography-mass spectrometry (GC-MS), and the in vitro antioxidant activity was evaluated. [Results] The optimum process for the extraction of volatile oil by reduced-pressure steam distillation was: particle size of 8 mesh, solid-liquid ratio …
Extraction Of Active Ingredients From Penthorum Chinense Pursh And Comparison Of Component Distribution In Different Parts, Xiang Zhuoya, Zhu Boyu, Zhu Yongqing, Xia Chen, Chen Song
Extraction Of Active Ingredients From Penthorum Chinense Pursh And Comparison Of Component Distribution In Different Parts, Xiang Zhuoya, Zhu Boyu, Zhu Yongqing, Xia Chen, Chen Song
Food and Machinery
Objective: This study aimed to determine the extraction solvent and compare the distribution of functional ingredient and antioxidant activities in different parts of Penthorum chinense pursh. Methods: the total phenolic content, total flavonoid content, antioxidant capacity and individual phenolic compounds content in Penthorum chinense pursh were determined and analyzed. Results: The total phenolic content, total flavonoid content increased and then decreased with the increase of solvent concentration. The seven main phenolic compounds （catechin, rutin, pinocembrin-7-O-glucoside, quercetin, kaempferol, pinocembrin and thonningianin A）, ABTS radical scavenging ability, and ferric ion reduction ability were the highest in 80% ethanol extract. The …
Optimization Of Anthocyanin Copigmentation Formula Of Purple Corn And Its Effect On The Quality Of Purple Corn, Pang Wenqian, Yu Rui, Li Dajing, Liu Chunju, Bai Bing
Optimization Of Anthocyanin Copigmentation Formula Of Purple Corn And Its Effect On The Quality Of Purple Corn, Pang Wenqian, Yu Rui, Li Dajing, Liu Chunju, Bai Bing
Food and Machinery
Objective: This study aimed to explore the copigmentation formula of purple corn anthocyanins. Methods: In this study, fructose, tannic acid, and pectin were used as co-pigmentation. The response surface method was used to optimize the co-pigmentation formula of purple corn anthocyanins, and the untreated purple corn was used as a control test. The anthocyanin components, color, texture, taste and antioxidant activity (DPPH free radical scavenging ability, ABTS free radical scavenging ability, and FRAP iron ion reducing ability) of purple corn after different treatments were determined. Results: 19% fructose, 0.07% tannic acid, and 1.9% pectin had the best copigmentation effect. Compared …
Phenolic Compositions And In Vitro Antioxidant Activities Of Tartary Buckwheat Wine Lees, Zhao Jiawei, Zheng Jia, Li Mao, Zhang Weijian, Yan Junlin
Phenolic Compositions And In Vitro Antioxidant Activities Of Tartary Buckwheat Wine Lees, Zhao Jiawei, Zheng Jia, Li Mao, Zhang Weijian, Yan Junlin
Food and Machinery
Objective: Explored the composition and content of phenolic compounds in tartary buckwheat wine lees, and study their antioxidant activity. Methods: Phenolic compounds in tartary buckwheat wine lees were analyzed by HPLC and LC-MS. And evaluating its antioxidant activity. Results: 7 phenolic compounds were identified from tartary buckwheat wine lees, including 5 flavonoids, with the highest content of rutin of （9.350±0.050） mg/g, followed by quercetin, isoquercetin, kaempferol-3-o-rutoside and kaempferol of two phenolic compounds. At 0.5 mg/mL, the scavenging rates of hydroxyl free radical, ABTS+ and DPPH free radical reached （73.29±0.09）%, （96.21±0.25）% and （82.55±0.68）%, respectively, with FRAP value of …
Study On Process Optimization And Antioxidant Activity Of Fermentative Cynanchum Auriculatum Tablet, Bu Jing, Shi Yun, Lin Yan, Qin Yuanyuan, Hong Jian
Study On Process Optimization And Antioxidant Activity Of Fermentative Cynanchum Auriculatum Tablet, Bu Jing, Shi Yun, Lin Yan, Qin Yuanyuan, Hong Jian
Food and Machinery
Objective: This study aimed to optimize the process parameters of fermentative Cynanchum auriculatum (CA) tablets to develop a new type of fermented product of CA. Methods: Taking complete slices of CA as raw materials, the process parameters of fermentative CA tablets were optimized by response surface methodology based on single factor experiments with sensory score and total acid content as indicators, and the antioxidant activity and amino acid content of fermentative CA tablets were tested. Results: The optimal process parameters for fermentative CA tablets were material liquid at ratio 1∶1, fermentation at 31 ℃, inoculation amount 9.6% and fermenting for …
Comparison Of The Main Components, Volatile Components, And Antioxidant Activity Of Two Types Of Fermented Bamboo Shoots, Liao An, Du Haiping, Cheng Hao, Liu Tianyi, Tian Yan
Comparison Of The Main Components, Volatile Components, And Antioxidant Activity Of Two Types Of Fermented Bamboo Shoots, Liao An, Du Haiping, Cheng Hao, Liu Tianyi, Tian Yan
Food and Machinery
Objective: The primary objective of this study is to investigate the chemical composition, volatile components, and biological activity of pickled bamboo shoots in the Guangxi and Guangdong regions, as well as the regional characteristics and flavor formation mechanisms of these pickled bamboo shoots. Methods: Physical and chemical experiments were used to analyze the major components in fermented bamboo shoots and their extracts. The volatile flavor components in fermented bamboo shoots were identified and analyzed using headspace solid-phase microextraction gas chromatography-mass spectrometry （HS-SPME-GC-MS）. The antioxidant activity of fermented bamboo shoot extracts was evaluated using in vitro antioxidant activity methods （ABTS free …
Effects Of Euglena Gracilis On The Quality And Antioxidant Activity Of Chiffon Cake, Yang Binhuang, Huang Yulan, Dai Congjie, Wang Baobei
Effects Of Euglena Gracilis On The Quality And Antioxidant Activity Of Chiffon Cake, Yang Binhuang, Huang Yulan, Dai Congjie, Wang Baobei
Food and Machinery
Objective: This study aimed to investigate the effect of Euglena gracilis on the quality and antioxidant activity of Chiffon cake and provide a reference for the application of E. gracilis in baked goods. Methods: E. gracilis powder (0.0%, 2.0%, 4.0%, 6.0% and 8.0%) with different contents were applied to Chiffon cake. The specific volume, water content, color, texture characteristics, sensory quality score, and antioxidant capacity of the cake were studied. Results: The addition of E. gracilis powder reduced the specific volume and the brightness of the cake, but had little effect on the water content. As the content of E. …
Optimization Of Macroporous Resin Adsorption Process Of Enzymatic Hydrolysis Of Pueraria Protein And Its Antioxidant Activity In Vitro By Response Surface Method, Yue Yihan, Yan Mingming, Shao Shuai, Ding Yiyuan, Jiang Ting
Optimization Of Macroporous Resin Adsorption Process Of Enzymatic Hydrolysis Of Pueraria Protein And Its Antioxidant Activity In Vitro By Response Surface Method, Yue Yihan, Yan Mingming, Shao Shuai, Ding Yiyuan, Jiang Ting
Food and Machinery
Objective： This study aims to optimize the adsorption of enzymatic hydrolysis of Pueraria protein by macroporous resin and maximize the antioxidant properties in vitro. Methods: The Box-Behnken response surface method was used to determine the optimization of adsorption of enzymatic hydrolysis of Pueraria protein. Using VC as a control, the antioxidant activity of Kase was determined before and after purification under the optimal purification process. Results： The optimal adsorption-desorption process of macroporous resin is: the mass concentration of the sample solution was 10.0 mg/mL, the flow rate of the eluent was 2.6 mL/min, and the volume fraction of …
Preparation, Structural Characteristics And Antioxidant Activity Of Cardamine Violifolia Oligopeptides, Wen Xiaolong, Xiang Jiqian, Zhang Liang, Li Yajie, Long Lan
Preparation, Structural Characteristics And Antioxidant Activity Of Cardamine Violifolia Oligopeptides, Wen Xiaolong, Xiang Jiqian, Zhang Liang, Li Yajie, Long Lan
Food and Machinery
Objective: This study aimed to prepare oligopeptidess of Camelina violifolia and expand its application range. Methods: C. violifolia protein was hydrolyzed by alkaline protease, and then used ultrafiltration membrane for isolating and concentrating, and obtained oligopeptides by freeze-drying. The structure and antioxidant activity of C. violifolia oligopeptides were analyzed. Results: The optimum conditions for the hydrolysis of C.violifolia protein were as follows: hydrolysis temperature 50 ℃, pH 10, enzyme dosage 4%, substrate concentration 2%, and hydrolysis degree 17.9%. The C. violifolia oligopeptides contents of protein and polypeptide were 49.01% and 42.87%, respectively. The oligopeptides had a strong absorption band at …
The Influence Of Drying Methods On The Physicochemical, Functional, And Antioxidant Properties Of Passion Fruit Peel, Liu Zhaohan, Yang Tongxiang, Xu Hanshan, Li Xuejing, Chen Junliang, Ren Guangyue, Duan Xu
The Influence Of Drying Methods On The Physicochemical, Functional, And Antioxidant Properties Of Passion Fruit Peel, Liu Zhaohan, Yang Tongxiang, Xu Hanshan, Li Xuejing, Chen Junliang, Ren Guangyue, Duan Xu
Food and Machinery
Objective: This study aimed to investigate the effects of drying methods on passion fruit peels. Methods: Passion fruit peels were treated with microwave vacuum freeze-drying, vacuum freeze-drying, heat pump drying, and far-infrared radiation drying. The drying characteristics, rehydration ratio, color difference, dietary fiber, functional properties, microstructure, total phenolic content, total flavonoid content, and antioxidant properties were measured and determined respectively. Results: Heat pump-dried passion fruit peels had poor rehydration ratio and functional properties. Microwave vacuum freeze drying reduced the drying time by 53% when compared tp far-infrared radiation drying, and the microwave vacuum freeze-dried treated passion fruit peels had a …
Optimization Of Extraction Process And Antioxidant Activity Of Total Flavonoids From Aloe Vera Stir-Fry Products, Zeng Lingqin, Guo Jiangtao, Liu Jie, Chen Zhengyuan, Xu Jiahong
Optimization Of Extraction Process And Antioxidant Activity Of Total Flavonoids From Aloe Vera Stir-Fry Products, Zeng Lingqin, Guo Jiangtao, Liu Jie, Chen Zhengyuan, Xu Jiahong
Food and Machinery
Objective: To optimize the extraction process of total flavonoids from Aloe vera stir-fry products and investigate its antioxidant activity. Methods: Single factor test and response surface method were used to optimize the extraction process, The content of total flavonoids in Aloe vera raw and fried products from different areas was determined by UV spectrophotometry,The antioxidant activity was studied by DPPH·, ABTS+·, ·OH and FRAP methods, the correlation between total flavonoids yield and antioxidant activity was analyzed by Pearson correlation. Results: The optimal extraction conditions were as follows soaking time 3 h, ultrasonic time 15 min, ethanol volume fraction …
Comparative Studies On The Antioxidant And Anti-Inflammatory Activities Of Water Extracts From Eight Kinds Of Foods, Yang Hong, Tang Li, Li Yi, Yuan Hongxia, Li Qingshan
Comparative Studies On The Antioxidant And Anti-Inflammatory Activities Of Water Extracts From Eight Kinds Of Foods, Yang Hong, Tang Li, Li Yi, Yuan Hongxia, Li Qingshan
Food and Machinery
Objective： This study aimed to investigate the active ingredients, and their antioxidant and anti-inflammatory activities, as well as the correlation between each other of different food water extracts. Methods： Black rice, black soybean, black sesame, Auricularia auricula, diospyros lotus, black corn, oat and millet were selected for the comparison study of the content of total flavonoids and polyphenols in the aqueous extract, and then the 1-diphenyl-2-picrylhydrazyl (DPPH) scavenging activity, hydroxyl radical scavenging ability and iron ion reduction capacity were determined to evaluate their antioxidant activity. Furthermore, the NO and IL-6 inhibitory activities on Lipopolysaccharides (LPS) induced RAW264.7 cells were …
Optimization Of Extraction And Antioxidant Activities Of Polyphenols From Honey Peachkernel By Ultrasonic-Assisted Enzymolysis Approach, Guo Mingyi, Deng Yan, Wang Tianxin, Zeng Chuantao, Wu Huachuang
Optimization Of Extraction And Antioxidant Activities Of Polyphenols From Honey Peachkernel By Ultrasonic-Assisted Enzymolysis Approach, Guo Mingyi, Deng Yan, Wang Tianxin, Zeng Chuantao, Wu Huachuang
Food and Machinery
Objective: This study aimed to explore the potential use of honey peach kernel as a by-product of characteristic agricultural product processing. Methods: The processing technology was optimized based on a single factor test and response surface test by analyzing the effects of enzyme addition amount, ultrasonic temperature, ethanol concentration, and ultrasonic time on the extraction amount of peach kernel polyphenols. Additionally, the antioxidant activities of the extracted polyphenols were studied. Results: The results showed that the optimal extraction parameters were as follows: enzyme adding quantity 5%, ultrasonic temperature 63 ℃, ethanol concentration 60%, and ultrasonic time 37 min. Under this …
Process Study On Mixed Bacterial Solid-State Fermentation Of Rice Bran For The Preparation Of Oryzanol And Evaluation Of Its Antioxidant Activity, Xia Xinxin, Lin Hai, Yang Guliang, Peng Xia, He Xinle
Process Study On Mixed Bacterial Solid-State Fermentation Of Rice Bran For The Preparation Of Oryzanol And Evaluation Of Its Antioxidant Activity, Xia Xinxin, Lin Hai, Yang Guliang, Peng Xia, He Xinle
Food and Machinery
Objective: In order to improve the yield of oryzanol of rice bran. Methods: Rice bran was selected as the research subject, and Saccharomyces cerevisiae and Bacillus subtilis were selected as solid-state fermentation strains through single-factor experiments. The mixed bacterial solid-state fermentation process was optimized by Box-Behnken response surface method combined with the single factor experiments, based on the content of oryzanol. The antioxidant activity of the fermentation extracts was evaluated using DPPH and ABTS free radical scavenging assays. Scanning electron microscopy （SEM） was used to analyze the principle of oryzanol enrichment in mixed bacterial solid-state fermentation. Results: Under the of …
Ultrasound-Assisted Extraction And Antioxidant Study Of Crude Polysaccharide From Agrocybe Praecox, Han Xiaolei, Lu Huiying, Liang Jueqin, Fan Wei, Liu Tao, Huang Zhiqun, Yang Guoshun, Xiong Zhi
Ultrasound-Assisted Extraction And Antioxidant Study Of Crude Polysaccharide From Agrocybe Praecox, Han Xiaolei, Lu Huiying, Liang Jueqin, Fan Wei, Liu Tao, Huang Zhiqun, Yang Guoshun, Xiong Zhi
Food and Machinery
Objective: In order to explore the extraction method and antioxidant activity of crude polysaccharide from edible fungus resources of reed. Methods: The characteristic Agrocybe praecox of reed edible fungus of Dongting Lake District was used as raw material, the extraction rate of polysaccharide was used as the index, and the extraction was carried out by ultrasonic-assisted hot water alcohol precipitation method. After taking the liquid-material ratio, ultrasonic extraction time, ultrasonic extraction power, hot water extraction temperature, hot water extraction time as the factors to finish the single factor experiments. Then the experiments was optimized by Box-Behnken center combined experimental design …
Effects Of Different Processes On Active Components And Antioxidant Activities Of Akebia Trifoliate Seed Oil, Gao Xiaolong, Xu Wei, Li Ying, Zhou Min
Effects Of Different Processes On Active Components And Antioxidant Activities Of Akebia Trifoliate Seed Oil, Gao Xiaolong, Xu Wei, Li Ying, Zhou Min
Food and Machinery
Objective: To compare the effects of different oil preparation processes on the active ingredients and oxidation activity of Akebia trifoliate seed oil. Methods: Akebia trifoliata seed oil was prepared from Akebia trifoliata seed by four oil extraction processes: cold pressing, hot pressing, supercritical CO2 extraction and extraction. The fatty acid composition, active ingredients （carotenoids, tocopherols, polyphenols, flavonoids） and DPPH free radical scavenging capacity of Akebia trifoliata seed oil were analyzed. Results: The fatty acid composition of Akebia trifoliata seed oil prepared by the four processes was similar. The content of palmitic acid was 20.62%～21.42%, the content of stearic acid …
Antioxidant And Hypoglycemic Activities Of Different Graded Fractions Of Polysaccharide From Goldenmelon, Chen Bing-Jie, Qiao Yong-Jin, Wang Xiao, Wang Chun-Fang, Liu Gui-Ge
Antioxidant And Hypoglycemic Activities Of Different Graded Fractions Of Polysaccharide From Goldenmelon, Chen Bing-Jie, Qiao Yong-Jin, Wang Xiao, Wang Chun-Fang, Liu Gui-Ge
Food and Machinery
Objective: The study aimed to research the physicochemical properties, structure, antioxidant activity and hypoglycemic activity of different fractions of polysaccharide of goldenmelon. Methods: Four kinds of goldenmelon polysaccharides (CP-40, CP-60, CP-70, CP-80) were obtained by graded purification of water extraction and alcoholic precipitation. Their molecular weight, monosaccharide composition, group composition, antioxidant and hypoglycemic activities were investigated by high performance liquid chromatography and fourier transform infrared spectroscopy. Results: With the increase of ethanol volume fraction, the total sugar content increased and the glucuronic acid content decreased. The molecular weights of these four polysaccharides were different, which indicated by the same composition …
Optimization Of Ginseng Ratio And Semen Ziziphi Spinosae Antioxidant Activity Based On The Combination Of Entropy-Weight Method And Grey-Correlation Degree Method, Xiao Feng-Qin, Wang Xin, Liu Hui, Dong Hong-Ying, Zhou Wen-Wen, Xue Zhi-Jia, Li Guang-Zhe, Yan Ming-Ming
Optimization Of Ginseng Ratio And Semen Ziziphi Spinosae Antioxidant Activity Based On The Combination Of Entropy-Weight Method And Grey-Correlation Degree Method, Xiao Feng-Qin, Wang Xin, Liu Hui, Dong Hong-Ying, Zhou Wen-Wen, Xue Zhi-Jia, Li Guang-Zhe, Yan Ming-Ming
Food and Machinery
Objective： This study aimed to develop relevant health products with ginseng and semen ziziphi spinosae as raw materials. Methods: HPLC and UV spectrophotometer were used to study the chemical components of different compatibility ratios of ginseng and semen ziziphi spinosae. The antioxidant activity in vitro of ginseng and semen ziziphi spinosae with different compatibility ratios was analyzed by DPPH free radical, ABTS+free radical, hydroxyl free radical and superoxide anion free radical scavenging rate. Moreover, the grey relational degree method was used, and entropy weight method was used as the discrimination coefficient for statistical analysis, combined with the characteristics …
Study On Antioxidant Activity And Synergistic Effect Of Flavonoids From Zanthoxylum Armatum Dc, Zhou Meng-Jiao, He Xin-Zhu, Li Chao-Jun, Liang Xiao-Feng
Study On Antioxidant Activity And Synergistic Effect Of Flavonoids From Zanthoxylum Armatum Dc, Zhou Meng-Jiao, He Xin-Zhu, Li Chao-Jun, Liang Xiao-Feng
Food and Machinery
Objective: This study aimed to investigate the antioxidation and synergistic effect of flavonoid extract of Zanthoxylum armatum DC. Methods: DPPH radical and ABTS radical scavenging methods were used to evaluate the antioxidant activity of flavonoids extract from Z. armatum, and the synergies of flavonoids extract with vitamin C and rutin complex were studied by adding method. Results: The semi-inhibitory concentrations of DPPH free radical and ABTS free radical IC50 were 0.03 and 0.062 mg/mL, respectively, showing strong antioxidant activity. The antioxidant activity of the complex composed of flavonoid extract and vitamin C or rutin was high, and the …
Extraction Of Polysaccharide From Green Coffee Beans And Its Antioxidant Activity, Shen Xiao-Jing, Xie Fu-Juan, Zhou Shao-Qin, Feng Yu
Extraction Of Polysaccharide From Green Coffee Beans And Its Antioxidant Activity, Shen Xiao-Jing, Xie Fu-Juan, Zhou Shao-Qin, Feng Yu
Food and Machinery
Objective: This study provided basic data for the investigation of polysaccharides in coffee and the development of natural active polysaccharides. Methods: The water extraction method and antioxidant activity of green coffee beans polysaccharide (GBP) from Yunnan province. Response surface method was used to optimize the extraction process of polysaccharide from coffee bean. Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM) were used to identify and characterize the structure of polysaccharide from coffee bean. DPPH, ABTS free radical scavenging assay and FRAP assay were used to evaluate the antioxidant capacity of coffee bean polysaccharide in vitro. Results: The …