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Articles 241 - 270 of 4759
Full-Text Articles in Food Science
Analysis Of Flavor Characteristics Of Herbal Cultivated Tremella Fuciformis Based On Component Difference Analysis And Intelligent Sensory, Chen Wanchao, Wu Di, Xiao Minsheng, Yao Shuxian, Yang Yan, Liu Yanfang
Analysis Of Flavor Characteristics Of Herbal Cultivated Tremella Fuciformis Based On Component Difference Analysis And Intelligent Sensory, Chen Wanchao, Wu Di, Xiao Minsheng, Yao Shuxian, Yang Yan, Liu Yanfang
Food and Machinery
Objective: Clarify the flavor characteristics of Tremella fuciformis cultivated on herbaceous substrate. Methods: In the study T. fuciformis cultivated on herbaceous substrate was used as the research object, while samples of yellow tremella and white tremella cultivated on conventional substrate were used as controls. The differences in flavor composition between them were analyzed using high-performance liquid chromatography and Headspace Solid Phase Microextraction Ggas Chromatography Mass Spectrometry (HS-SPME-GC-MS). And combined with intelligent sensory technology, its flavor characteristics were analyzed. Results: According to multi-dimensional evaluations such as fresh and sweet amino acid and flavor nucleotides content, taste activity value and equal freshness …
Comparative Study On Several Black Bean Components, Antioxidant And Enzyme Inhibition In Vitro, Dang Yuting, Zhang Yan, Jing Boxing, Su Xiaomeng, Chai Xiyan
Comparative Study On Several Black Bean Components, Antioxidant And Enzyme Inhibition In Vitro, Dang Yuting, Zhang Yan, Jing Boxing, Su Xiaomeng, Chai Xiyan
Food and Machinery
Objective: The difference in bioactive substance content and bioactivity in black beans were compared. Methods: The contents of total phenolic acids, total flavonoids, condensed tannins, total anthocyanins, total polysaccharides and total proteins of nine kinds of black beans were determined. The antioxidant activities of black bean extracts in vitro and their inhibitory effects on α-amylase, pancreatic lipase, acetylcholinesterase and tyrosinase were compared. Results: The contents of total phenolic acid, total flavonoids, condensed tannins and total anthocyanins were as follows: equine bean > small black bean > black bean; Total polysaccharide content: small black bean > black bean > horse bean; Total protein content: horse …
Effects Of Grape Seed Proanthocyanidins On Hepg2 Cell Genes And Related Functions Based On Transcriptome Sequencing, Zheng Wancai, Dang Bin, Zhang Ji, Luo Qiaoyu, Feng Zuoshan
Effects Of Grape Seed Proanthocyanidins On Hepg2 Cell Genes And Related Functions Based On Transcriptome Sequencing, Zheng Wancai, Dang Bin, Zhang Ji, Luo Qiaoyu, Feng Zuoshan
Food and Machinery
Objective： Based on transcriptome sequencing analysis, the effect of grape seed procyanidins on HepG2 cell genes and related functions was identified. The key genes and metabolic pathways involved in the treatment of HepG2 cells with procyanidins were confirmed. Methods: Through transcriptome sequencing, screening differential genes, gene functional annotation and enrichment analysis of the KEGG pathway, transcriptome studies were conducted on grape proanthocyanidin-treated cells. Results: After treating HepG2 cells with grape anthocyanins, the main biological processes enriched are cellular processes, metabolic processes, biological regulatory processes, immune system processes, reproductive regulation, and growth regulation. Research has found that 12 key differentially expressed …
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 …
Study On Preparation, Characterization And Stability Of Β-Cyclodextrin Inclusion Compound Of Foeniculum Vulgare Volatile Oil, Zhang Yumeng, Xu Fang, Yao Yuhan, Li Chenyang, Zhao Jun
Study On Preparation, Characterization And Stability Of Β-Cyclodextrin Inclusion Compound Of Foeniculum Vulgare Volatile Oil, Zhang Yumeng, Xu Fang, Yao Yuhan, Li Chenyang, Zhao Jun
Food and Machinery
Objective: To Prepared of β-Cyclodextrin inclusion complex with Foeniculum vulgare（fennel） volatile ooil and study on its sstructural characterization and stability. Methods: Based on the inclusion rate, the inclusion yield and the content of trans-anethole in the inclusion compound, the comprehensive evaluation index was established, and the effects of the ratio of fennel volatile oil to β-cyclodextrin, inclusion temperature and inclusion time on it were explored. The preparation process was optimized by orthogonal test. It was characterized by scanning electron microscopy, thin layer chromatography, Fourier infrared spectroscopy and differential scanning calorimetry. Finally, the stability of the inclusion compound was …
Effects Of Drying Methods On The Quality And Volatile Flavor Compounds Of Oil Tea Powder, Li Guanli, Wu Qiuyue, Chen Xixia, Wu Shujie, Duan Qiuxia, Li Xiaochun, Luo Yanghe
Effects Of Drying Methods On The Quality And Volatile Flavor Compounds Of Oil Tea Powder, Li Guanli, Wu Qiuyue, Chen Xixia, Wu Shujie, Duan Qiuxia, Li Xiaochun, Luo Yanghe
Food and Machinery
Objective: This study aimed to explore suitable drying methods for oil tea powder, making it easier for oil tea consumption and storage. Methods: Spray drying, vacuum freeze drying and vacuum drying were used to dry oil tea soup, and the quality (moisture content, sensory evaluation and color) and volatile substances of dried oil tea powder were evaluated. Results: The sensory score of vacuum freeze-drying oil tea powder was the highest (93), the water content was the lowest (3.78%), and the color was better（ΔE value 49.74). 104 volatile substances were identified from three drying methods of oil tea powder using …
Research Progress On The Effects Of Processing Methods On Gluten Protein Structure And Properties, Cui Guoting, Wang Duan, Guo Jinying, Ren Guoyan
Research Progress On The Effects Of Processing Methods On Gluten Protein Structure And Properties, Cui Guoting, Wang Duan, Guo Jinying, Ren Guoyan
Food and Machinery
Steamed bread, noodles, deep-fried dough sticks and other noodle foods are an important part of our diet, and gluten protein is an important component of noodle foods. Common food processing techniques used to prepare noodles, including heating, freezing, mechanical processing, fermentation, and electric field treatment, alter the hydrophobic disulfide bond of the protein, denature and aggregate the protein, and cause other intricate physical and chemical changes, all of which have an impact on the texture and flavor of the finished noodle product. This paper mainly introduces the current research status of the influence of processing methods such as heating, freezing, …
Research Progress On Extraction, Physiological Function And Application Of Pectin, Fei Congxuan, Fu Meiling, Zhang Di, Li Dandan, Xiu Jianhua
Research Progress On Extraction, Physiological Function And Application Of Pectin, Fei Congxuan, Fu Meiling, Zhang Di, Li Dandan, Xiu Jianhua
Food and Machinery
Pectin is a kind of natural polysaccharide polymer, which is an important part of the cell wall of higher plants. It has physiological functions such as cholesterol-lowering, anti-tumor, anti-oxidation and hypoglycemic, and beneficial to intestinal health. In this review, pectin extraction methods and their advantages and disadvantages in recent years were summarized, and the yield, galacturonic acid content and esterification degree of pectin extracted from different sources and methods were compared and analyzed. The physiological function of pectin and its application in various aspects were also introduced, and the future development direction was prospected.
Detection Of Aminoglycoside Antibiotic Residues In Pork By Quechers Method Combined With Sers Technique, Yang Haifan, Ding Li, Xu Miaowen, Shen Kang, Wang Xubo
Detection Of Aminoglycoside Antibiotic Residues In Pork By Quechers Method Combined With Sers Technique, Yang Haifan, Ding Li, Xu Miaowen, Shen Kang, Wang Xubo
Food and Machinery
Objective: To achieve rapid, quantitative and high-throughput detection of aminoglycoside antibiotic residues in pork. Methods: Square-array aligned SERS substrates based on Au nanoflowers （AuNFs） were prepared using PP synthetic paper as a substrate. Pork samples were pre-treated by QuEChERs method and subjected to SRES. Results: Using 4-mercaptobenzoic acid as the SERS probe molecule, the substrate exhibited good homogeneity, SERS enhancement effect, reproducibility and stability. the SERS signal intensities at the characteristic peaks at 475, 619 cm-1 showed good linear relationships with the logarithms of the concentrations of gentamicin sulphate and neomycin sulphate, respectively （R2 of 0.991 6 …
Structural Characteristics And Hypoglycemic Activity Of Polysaccharides From Different Parts Of Wampee, He Junye, Liu Cheng, Yu Chongyang, Sun Pengpeng, Ren Yuanyuan
Structural Characteristics And Hypoglycemic Activity Of Polysaccharides From Different Parts Of Wampee, He Junye, Liu Cheng, Yu Chongyang, Sun Pengpeng, Ren Yuanyuan
Food and Machinery
Objective: This study aimed to develop antioxidant products and anti-diabetes drugs of wampee. The study aimed to research the structural characteristics, anti-oxidation and hypoglycemic properties in vitro of polysaccharides from different parts of wampee. Methods: The structural properties, in vitro antioxidant and hypoglycemic activities of polysaccharides from the fruit, peel and seeds of wampee (CWP-F, CWP-P, and CWP-S) were analyzed and compared from the aspects of chemical composition, molecular weight, monosaccharide composition, appearance, DPPH free radical scavenging rate and α-amylase inhibition rate. Results: CWP-F had the highest molecular weight and was mainly composed of galactose and arabinose, CWP-P was mainly …
Research Progress On The Mechanism Of Food-Derived Antihypertensive Peptides, Wang Baobei, Zhang Hui, Liu Yusong, Chen Hongbin, Guo Fengxian, Zheng Zongping
Research Progress On The Mechanism Of Food-Derived Antihypertensive Peptides, Wang Baobei, Zhang Hui, Liu Yusong, Chen Hongbin, Guo Fengxian, Zheng Zongping
Food and Machinery
In this review, several mechanisms of antihypertensive peptides derived from food and its by-products were summarized. Mechanisms based on the RAAS system such as ACE/Ang Ⅱ/AT1R signaling pathways and ACE2/Ang (1-7)/MasR signaling pathways were included. Mechanisms targeting at KNOS system including PI3K/Akt/eNOS signaling pathway, PPAR-γ/caspase3/MAPK/eNOS signaling pathway and L-type Ca2+ channel were also discussed. In addition, the pathways of reducing blood pressure by inhibiting endothelin-converting enzyme (ECE) activity discovered in recent years were also introduced.
Research Advances On The Association Between Human Milk Oligosaccharides And Infant Health, Jiang Yikang, Dong Ling, Liu Hongfei, Pan Lina, Hu Yibo, Peng Xiyang, Kang Wenli, Peng Xiaoyu, Wang Jiaqi, Li Wei
Research Advances On The Association Between Human Milk Oligosaccharides And Infant Health, Jiang Yikang, Dong Ling, Liu Hongfei, Pan Lina, Hu Yibo, Peng Xiyang, Kang Wenli, Peng Xiaoyu, Wang Jiaqi, Li Wei
Food and Machinery
Human milk oligosaccharides （HMOs） are a group of complex glycans in human milk and play an important role in promoting the growth and development of infants, and more than 200 kinds of HMOs have been identified so far. In this paper, the types and structures of HMOs and their roles in improving infant intestinal health, promoting immune system development and brain development were reviewed. The application status of HMOs was summarized, the possibility and necessity of industrial production and application of HMOs in the future were prospected.
Research And Challenges Of Micropumps And Microvalves In Microfluidic Systems, Liu Linbo, Jiang Zhuo, Shen Xuanxuan, He Ye
Research And Challenges Of Micropumps And Microvalves In Microfluidic Systems, Liu Linbo, Jiang Zhuo, Shen Xuanxuan, He Ye
Food and Machinery
Microfluidic chips are driven by microfluidic pumps and controlled by microfluidic valves in microfluidic systems to achieve accurate manipulation of microfluidics. With the continuous improvement of microfluidic chip integration, liquid channels have become more complex and have smaller volumes. How to achieve fluid drive and control at the micro scale has become a key focus in chip design. The paper elaborates on the current research status, key technologies, and development trends of micro pumps and micro valves both domestically and internationally, aiming to provide reference and guidance for the development of related industries and technological research.
Discovery, Preparation And Identification Of A New Type Of Oxyphenisatine Di（Acetate） Analogue In Dietary Supplement, Xia Jintao, Wu Wanqin, Zhu Songsong, Jiang Feng
Discovery, Preparation And Identification Of A New Type Of Oxyphenisatine Di（Acetate） Analogue In Dietary Supplement, Xia Jintao, Wu Wanqin, Zhu Songsong, Jiang Feng
Food and Machinery
Objective: To find, prepare and identify a new oxyphenisatine di（acetate） analogue. Methods: A suspected derivative of oxyphenisatine di（acetate） was found by high-performance liquid chromatography-quadrupole-time-of-flight-mass spectrometry during the routine screening of weight loss healthcare product. The compound was isolated and purified by column chromatography, and the possible structures were inferred from the information of isotope mass spectra, secondary ion mass spectra, one-dimensional and two-dimensional NMR spectra. Finally, all possible structures were prepared by de novo synthesis strategy, and their fine structures were confirmed by spectral comparison. Results： The compound was identified as 5-Cl oxyphenisatine di（acetate）, a new type of oxyphenisatine di（acetate）, …
Optimization Of Culture Conditions For Maximum Viable Count Of Brevibacillus Laterosporus Based On Mtt Colorimetry And Response Surface Methodology, Song Peng, Li Lixiang, Zhao Biao, Wang Zele, Sun Xingxin
Optimization Of Culture Conditions For Maximum Viable Count Of Brevibacillus Laterosporus Based On Mtt Colorimetry And Response Surface Methodology, Song Peng, Li Lixiang, Zhao Biao, Wang Zele, Sun Xingxin
Food and Machinery
Objective: This study aimed to explore the optimal medium composition and culture conditions for obtaining the maximum viable count of Brevibacillus laterosporus. Methods: Based on establishing the correlation regression equation between the MTT colorimetric method and plate counting method, the optimal medium composition (carbon source, nitrogen source, inorganic salt) and fermentation conditions (initial pH, temperature, inoculation amount, KH2PO4) for obtaining the maximum viable count of B. laterosporus were optimized. Results: A significant linear correlation for viable count determination between MTT colorimetry and plate counting (R2>0.999) was found; Maltose, CaCl2, initial …
Green Analysis Of Glyphosate And Its Metabolite Amino Methyl Phosphoric Acid In Tea, Li Beibei, Wang Wei, Jiang Feng, Wang Huixia, Chen Li
Green Analysis Of Glyphosate And Its Metabolite Amino Methyl Phosphoric Acid In Tea, Li Beibei, Wang Wei, Jiang Feng, Wang Huixia, Chen Li
Food and Machinery
Objective： This study aimed to develop an ion chromatography-tandem mass spectrometry (IC-MS/MS) for the analysis of glyphosate and its metabolite amino methyl phosphoric acid (AMPA) residues in tea without derivatization. Methods： Tea samples were ultrasonically extracted with 20 mmol/L NaOH aqueous solution and cleaned up by dispersive solid-phase extraction (150 mg primary-secondary amine (PSA), 15 mg C18, 15 mg graphitized carbon black (GCB)). The samples were separated on an ion chromatographic column AS11-HC-4 μm (2 mm×250 mm) by using an isometric elution procedure of 35 mmol/L aqueous solution of sodium hydroxide as mobile phase. A multiple reactions monitoring …
Migration Quality Of Formaldehyde In The Polylactic Acid Straw Detected By Hplc, Hu Yun, Zou Yongping, Zhou Yuanyuan, Wang Shuai, Liang Zhichun
Migration Quality Of Formaldehyde In The Polylactic Acid Straw Detected By Hplc, Hu Yun, Zou Yongping, Zhou Yuanyuan, Wang Shuai, Liang Zhichun
Food and Machinery
Objective: A formaldehyde detection method was established for the accurate analysis of the migration of formaldehyde in water and acid simulants from the polylactic acid straws. Methods: The preferred chromatographic conditions were: mobile phase water-acetonitrile (Vwater∶Vacetonitrile of 55∶45), column temperature of 35 ℃, detection wavelength of 355 nm. The optimized 2,4-dinitrophenylhydrazine derivative conditions were: the acetic acid in acidic 2,4-dinitrophenylhydrazine solution of 1.5 mL/100 mL (pH 3.07), the molar ratio of 2,4- dinitrophenylhydrazine of quadruple formaldehyde, the reaction temperature of 45 ℃, and the reaction time of 40 min. Results: The linear equation of formaldehyde-2,4-dinitrobenzene …
Rice Fatty Acid Detection Method Combining Hyperspectral Technology With Improved Lssvm, Fu Juanjuan, Chen Chunru, Huang Zhenlin, Sun Feng
Rice Fatty Acid Detection Method Combining Hyperspectral Technology With Improved Lssvm, Fu Juanjuan, Chen Chunru, Huang Zhenlin, Sun Feng
Food and Machinery
Objective: To solve the problems of low accuracy and poor efficiency in the existing rice quality testing methods of food enterprises. Methods: Based on a hyperspectral data acquisition system, a fast and non-destructive detection method for stored rice quality was proposed, which combined an improved bacterial foraging algorithm and least squares support vector machine. By applying the improved bacterial foraging algorithm, the hyperparameters (regularization parameter and kernel parameter) of the least squares support vector machine were optimized to achieve rapid and non-destructive detection of rice quality. its performance was analyzed through experiments. Results: The proposed method can achieve rapid and …
Application Of Gas Chromatography Combined With Stoichiometry In Discriminant Analysis Of Pseudo Mixtures Of Walnut Oil And Rapeseed Oil, Wu Shibo, Liu Yanqi, Li Chao, Ma Ning, Yao Heng, Wang Mengmeng
Application Of Gas Chromatography Combined With Stoichiometry In Discriminant Analysis Of Pseudo Mixtures Of Walnut Oil And Rapeseed Oil, Wu Shibo, Liu Yanqi, Li Chao, Ma Ning, Yao Heng, Wang Mengmeng
Food and Machinery
Objective: This study aimed to investigate different discriminant analysis models for pseudo-mixtures of walnut oil and rapeseed oil. Methods: Gas chromatography technology was used to analyze the fatty acid content in the adulterated mixture of walnut oil and rapeseed oil. Chemical stoichiometric methods were used to model the gas chromatography data, and discriminant analysis was performed on different proportions of walnut oil and rapeseed oil mixtures. Results: Pure walnut oil and adulterated walnut oil were distinguihed by using Principal Component Analysis (PCA) identified, and percentage of adulteration in the sample was calculated. 83.33% of the samples were successfully categorized using …
Rapid Determination Of Moisture Content Of High Cellulose And Lignin Materials By Near-Infrared Diffuse Reflectance Spectroscopy, Yao Li, Li Zongjun, Zhu Menjun, Dai Hairong, Li Xiaoyan
Rapid Determination Of Moisture Content Of High Cellulose And Lignin Materials By Near-Infrared Diffuse Reflectance Spectroscopy, Yao Li, Li Zongjun, Zhu Menjun, Dai Hairong, Li Xiaoyan
Food and Machinery
Objective: To establish a rapid method for moisture detection of high cellulose and lignin materials. Methods: The areca nut, a Chinese herbal medicine containing high cellulose and lignin, was selected. Use a near-infrared spectrometer to collect near-infrared diffuse reflectance spectra. Apply NIR Cal modeling software to preprocess the spectral data, select the optimal feature wavelengths, and use partial least squares (PLS) analysis to establish a quantitative model for areca nut moisture content. Results: A quantitative model for areca nut moisture content was acquired, with the coefficient of determination of 0.994 2, the root mean square of the calibration error (RMSEC) …
Numerical Simulation Of The Effect Of Freezing Sword Structure On The Ice Performance Of Block Ice Machine, Sun Huan, Yang Kai, Liu Xiaotong
Numerical Simulation Of The Effect Of Freezing Sword Structure On The Ice Performance Of Block Ice Machine, Sun Huan, Yang Kai, Liu Xiaotong
Food and Machinery
Objective: To add a freezing sword inside the evaporator of the ice mould of a direct-cooled block ice machine to achieve rapid ice production. Methods: COMSOL was used to simulate the effects of the cross-sectional shape of the freezing sword and the freezing sword inclination angle on the ice production process. Results: As the ice making process continued, the average internal temperature of the ice mould with additional freezing swords of different cross-sectional shapes decreased and the volume fraction of solid phase in the ice mould increasedd with time, but the average internal temperature of the ice mould with additional …
Establishment And Experiment Verification Of Screw Thrust Model Of Spiral Robot For Granary, Zhao Xianfeng, Yin Qiang, Yu Junpeng, Yang Liu, Zhang Yonglin
Establishment And Experiment Verification Of Screw Thrust Model Of Spiral Robot For Granary, Zhao Xianfeng, Yin Qiang, Yu Junpeng, Yang Liu, Zhang Yonglin
Food and Machinery
Objective： To clarify the interaction mechanism model between screw and grain in grain pile depth, and to determine the mechanical characteristics of screw of spiral robot for granary at different speeds and depths, so as to provide the design basis for the motion control system. Methods： Using mathematical model, combining Janssen grain storage pressure theory and Janosi shear-displacement equation, the shear stress model was established, and then the thrust model of screw was derived from the shear stress model. Through the design and construction of the experimental device, the combination of different speed and pressure was used to carry out …
Simulation Research On The Transfer And Collection Part Of Warehouse Bottom Surplus Grain Cleaning Device, He Yingzhen, Wang Mingxu, Wang Wei, Li Shubo
Simulation Research On The Transfer And Collection Part Of Warehouse Bottom Surplus Grain Cleaning Device, He Yingzhen, Wang Mingxu, Wang Wei, Li Shubo
Food and Machinery
Objective: To verify whether the structure design of the conveying part and the collecting part of the cleaning device designed for the surplus grain at the bottom of the cottage warehouse is reasonable, and to determine the key parameters of the device operation, so as to avoid the waste of procurement and manufacturing. Methods: Based on discrete element method, EDEM simulation software was used to simulate the operation effect of the transfer part and the collection part, and the drop rate was used as the evaluation parameter. Results: Through the observation and analysis of the simulation results, it was concluded …
Design And Processing Test Of Eel Automatic Filleting Machine, Liu Mingyong, Ouyang Zhouhuan, Han Xinguang, Xiang Xue, Zhu Lin
Design And Processing Test Of Eel Automatic Filleting Machine, Liu Mingyong, Ouyang Zhouhuan, Han Xinguang, Xiang Xue, Zhu Lin
Food and Machinery
Objective: A special cutting mechanism for slicing elongated fish with smooth surface was designed. Methods: Taking the slimy eel as the research object, the mechanism of clamping and cutting operation was analyzed. Taking cutting quality and cutting time as test indexes, the influence of main parameters such as clamping wheel speed, cutting tool speed and clamping wheel surface geometry on cutting quality and cutting time were investigated. Results: The main factors affecting cutting quality were blade speed and clamping wheel limit height, and the most important factors affecting cutting time were clamping wheel speed. When the clamping wheel limit height …
Effects Of Irradiation Methods On Quality And Shelf Life Of Choerospondias Axillaris Pastilles, Mao Qingxiu, Xu Yuanfang, Chen Quling, Zhang Qiling, Li Wenge, Yang Yi
Effects Of Irradiation Methods On Quality And Shelf Life Of Choerospondias Axillaris Pastilles, Mao Qingxiu, Xu Yuanfang, Chen Quling, Zhang Qiling, Li Wenge, Yang Yi
Food and Machinery
Objective: This study aimed to explore the best irradiation method and irradiation dose to treat Choerospondias axillaris pastilles. Methods: C. axillaris pastilles were irradiated with 0～10 kGy gradient dose of 60Co-γ ray and electron beam respectively, the changes of the indexes including microbial load, protein, fat, total sugar, L(+)-ascorbic acid, organic acids, pH value, sensory quality, and the shelf life quality stored in 0～360 days at room temperature were studied. Results: 60Co-γ ray and electron beam irradiation both had bactericidal effects on C. axillaris pastilles, all microbial limit indexes including aerobic bacterial count, coliform bacteria, …
Simulation And Analysis Of Forced Air Precooling Performance Of Apples With Different Fruit Diameters, Tian Jinjin, Gu Xudong, Zhang Zhe, Zhu Zhiqiang, Ji Xian
Simulation And Analysis Of Forced Air Precooling Performance Of Apples With Different Fruit Diameters, Tian Jinjin, Gu Xudong, Zhang Zhe, Zhu Zhiqiang, Ji Xian
Food and Machinery
Objective: To analyze the effect of apples of different fruit diameters on differential pressure precooling under the same box. Methods: Based on the spherical analogy model and heat transfer theory, the CFD unsteady SST k-ω turbulence model was used to numerically simulate the differential pressure precooling of apples with different air supply air speed, temperature, box opening size and fruit diameter, and three different working conditions were selected for accuracy. The simulation scheme of mixed orthogonal test was used to discuss the effects of different factors and different fruit diameters on the cooling rate and pre-cooling uniformity. Results: …
Study Of Quality Changes In High Moisture Wheat After Hot Air Drying, Fan Mengke, Chen Pengxiao, Liu Ye, Zhu Wenxue, Jiang Mengmeng, Zhang Yurong, Wang Xiaowan, Wu Jianzhang
Study Of Quality Changes In High Moisture Wheat After Hot Air Drying, Fan Mengke, Chen Pengxiao, Liu Ye, Zhu Wenxue, Jiang Mengmeng, Zhang Yurong, Wang Xiaowan, Wu Jianzhang
Food and Machinery
Objective: To study the effects of different drying processes on the quality of high moisture wheat. Methods: Investigates the changes of wheat quality under different drying processes in three dimensions: appearance quality, nutritional quality and processing quality. Three indicators, namely colour, wet gluten content and drying rate, were selected as response values and combined with response surface analysis to predict the optimal drying process for high moisture wheat. Results: Drying temperature was the main influencing factor. As the temperature increased, the colour of the wheat deepened, the crude protein content decreased, the wet gluten content decreased, the water absorption of …
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 …
Changes Of Volatile Aroma Components And Biochemical Components In Fenghuang Dancong Tea During Processing, Li Zhangwei
Changes Of Volatile Aroma Components And Biochemical Components In Fenghuang Dancong Tea During Processing, Li Zhangwei
Food and Machinery
Objective： This study aimed to optimize the processing technology of Fenghuang dancong tea. Methods： Headspace solid phase microextraction (HS-SPME), Gas chromatography-mass spectrometry (GC-MS), and spectrophotometer were used to extract, determine and analyze the volatile aroma and non-volatile biochemical components of Fenghuang dancong tea in different stages of processing. Results: The alcohols, aldehydes, ketones and esters showed a decreasing trend while the alkanes and aromatic ring substances exhibited an increasing trend during the processing. The contents of tea polyphenols, amino acids, caffeine, and catechin in non-volatile biochemical components decreased gradually during processing. The contents of soluble sugar and water extract increased …
Optimization Of Extraction Process And Structural Characterization Of Polysaccharides From Cornus Officinalis, Xiao Fucai, Li Yingkui, Huang Fei, Gu Junhua
Optimization Of Extraction Process And Structural Characterization Of Polysaccharides From Cornus Officinalis, Xiao Fucai, Li Yingkui, Huang Fei, Gu Junhua
Food and Machinery
Objective: This study aimed to optimize the microwave assisted aqueous two-phase extraction (MATPE) process of polysaccharides from Cornus officinalis and obtain a uniform polysaccharide fraction. Methods: The best extraction technology was determined through an orthogonal experiment. To obtain a uniform polysaccharides fraction (COP-2-S), the crude extract of C. officinalis polysaccharides was purified using DEAE-52 cellulose and Sephadex G-100 column chromatography. The molecular weight of COP-2-S was determined by high performance gel permeation chromatography. The monosaccharide composition of COP-2-S was determined by gas chromatography. The structure of COP-2-S was characterized by UV, and IR spectra, and a scanning electron microscope. Results: …