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Articles 3061 - 3090 of 4816
Full-Text Articles in Food Biotechnology
Application Of Slurry Ice Combined With Ozone In Preservation Of Aquatic Products, Liu Feng, Xie Jing
Application Of Slurry Ice Combined With Ozone In Preservation Of Aquatic Products, Liu Feng, Xie Jing
Food and Machinery
Ice slurry is used for the preservation of aquatic products with high cooling efficiency and good preservation effect, which could utilize the seawater directly. In recent years, the study of ice slurry has become a hot spot. In this review, the research situation of ice slurry for the preservation of aquatic products in recent years at home and abroad were introduced. The combination of ozone and ice slurry was given to use the bactericidal and bacteriostatic effect of ozone to slow down the process of corruption of catches and extend the shelf life of products. Moreover, the future and development …
Process Optimizing To Produce Of Non-Fried Instant Noodles By Hot Air-Explosion Puffing Drying, Hu Jian, Zhou Ying, Zuo Bo, Shi Yixue, Dai Yangjun
Process Optimizing To Produce Of Non-Fried Instant Noodles By Hot Air-Explosion Puffing Drying, Hu Jian, Zhou Ying, Zuo Bo, Shi Yixue, Dai Yangjun
Food and Machinery
In order to optimize the best process for the production of non-fried instant noodles by hot air-explosion puffing drying. 5 factors of hot air-explosion puffing drying process were evaluated by Plackett-Burman experimental design. 3 significant factors affected the quality of instant noodles, including hot air time, explosion puffing temperature and time. Then the steepest climbing experiment was used to approximate the maximum response region. Finally, the optimum process was obtained by Box-Behnken experiment, treated in hot air at 75 ℃ for 36 min, and puffing at 75 ℃ for 87 min. Under this circumstance, the rehydration time of non-fried instant …
Effect Of Smoking Regimes On Smoke Release Of Super Slim Cigarettes With Perforation Paper, He Hongmei, Zhang Yuan, Zhu Huaiyuan, Zhuang Yadong, Xiong Xiaomin, Liu Xianjun
Effect Of Smoking Regimes On Smoke Release Of Super Slim Cigarettes With Perforation Paper, He Hongmei, Zhang Yuan, Zhu Huaiyuan, Zhuang Yadong, Xiong Xiaomin, Liu Xianjun
Food and Machinery
In order to study the mainstream smoke of the super slim cigarettes with perforation cigarette paper. The tar and nicotine deliveries on a puff-by-puff basis of the super slim cigarettes with different cigarette paper perforation parameters were measured under ISO and HCI regimes respectively. The results showed that: 1) Under ISO regime, tar deliveries of the perforation super slim cigarettes decreased, and there were no obvious variations of nicotine between the perforation cigarettes and the control samples. 2) Under HCI regime, tar and nicotine deliveries of perforation cigarettes increased, and the perforation had a negative effect on the total tar …
Influence Of The Moisture Content Of The Tobacco Blend On The Slim Cigarette, Yu Saibo, Tan Chao, Wang Shitai, Guo Xuemin, Jin Yong, Fan Hongmei, Tan Haifeng, Li Ke, Chen Qian, Liu Qi
Influence Of The Moisture Content Of The Tobacco Blend On The Slim Cigarette, Yu Saibo, Tan Chao, Wang Shitai, Guo Xuemin, Jin Yong, Fan Hongmei, Tan Haifeng, Li Ke, Chen Qian, Liu Qi
Food and Machinery
The influence of the moisture content of the tobacco blend on physical, structural distribution of the tobacco blend, static burning rate, firecone falling, mainstream smoke release, as well as cigarette taste of the slim cigarette were investigated. The results showed that the tobacco blend constituent, firecone falling and cigarette taste were greatly influenced by the moisture content of the tobacco blend when that was between 11.5% to 13.8%. With the increasing of the moisture content of tobacco blend, its degrading resistant property of the tobacco blend became better and the coarse fraction of the tobacco blend constituent was dominating. With …
Effects Of Pulsed Electric Field And Metal Ions On The Electrochemical Properties Of Ovalbumin Solution, Hu Fei, Tang Ting, Zhang Jia, Liu Yanyan, Jiang Aimin, Jiang Zhuo
Effects Of Pulsed Electric Field And Metal Ions On The Electrochemical Properties Of Ovalbumin Solution, Hu Fei, Tang Ting, Zhang Jia, Liu Yanyan, Jiang Aimin, Jiang Zhuo
Food and Machinery
Zeta potential analyzer, conductivity meter and electrochemical workstation were used to analyze the variation of zeta potential, electrical conductivity and redox potential, with addition of different divalent metal ions (Ca2+, Ba2+, Mn2+ and Cu2+) to ovalbumin solution before and after pulsed electric field treatment. The results showed that: ① the zeta potential of ovalbumin solution with Ba2+ and Cu2+ decreased with the addition of pulsed electric field energy and samples with Ca2+ and Mn2+ increased first and then decreased; ② With the increase of pulse electric field treatment time, …
Effects Of Dynamic High Pressure Microfluidization Combined With Maillard Reaction On Structural Changes And Properties Of Α-Lactalbumin, Yang Ping, Tu Zongcai, Liu Jun, Shao Yanhong, Xie Yawen, Sha Xiaomei, Zhang Lu
Effects Of Dynamic High Pressure Microfluidization Combined With Maillard Reaction On Structural Changes And Properties Of Α-Lactalbumin, Yang Ping, Tu Zongcai, Liu Jun, Shao Yanhong, Xie Yawen, Sha Xiaomei, Zhang Lu
Food and Machinery
The Effects of dynamic high pressure microfluidization (DHPM) combined with Maillard reaction on structure and properties of α-lactalbumin (α-LA) were investigated by SDS-PAGE and spectroscopy. The results demonstrated that the fluorescence intensity and surface hydrophobicity (H0) of α-LA treated by DHPM firstly increased then decreased, with the maximum values at 110 MPa. After Maillard reaction (MR) with lactose, the fluorescence intensity of α-LA was declined. However, H0, emulsibility and anti-oxidation activity of α-LA was improved. These results illustrated that tertiary structure of α-LA was changed due to DHPM pretreatment, thereby promoting MR, emulsibility and anti-oxidation activity …
Mechanism Of Agaricus Brasiliensis Polysaccharides Inducing The No Release In Macrophages, Fang Leilei, Zhao Xiaotong, Zhang Yanqing, Xie Junbo
Mechanism Of Agaricus Brasiliensis Polysaccharides Inducing The No Release In Macrophages, Fang Leilei, Zhao Xiaotong, Zhang Yanqing, Xie Junbo
Food and Machinery
In this study, macrophage RAW264.7 cells were used to study the effect of Agaricus brasiliensis polysaccharide on NO release and iNOS expression, and the phosphorylation level of IκBα protein was detected to explore its mechanisms. All the studies in the present paper could provide a new theoretical basis for the development of A. brasiliensis polysaccharide. The results showed that different concentrations of the polysaccharides enhanced the NO release and the expression of iNOS protein in RAW264.7 cells in the same dose-dependent manner. In addition, A. brasiliensis polysaccharide at 25 μg/mL promoted the expression of p-IκBα protein in RAW264.7 cells, and …
Isolation, Identification And Biological Characteristics Of Intestinal Probiotics From The Longevity Crowd In Kashi, Xinjiang, Aymihri Mollam, Nusratgul Anwar, Busaram Abliz, Hamida Gulam, Osman Yimit
Isolation, Identification And Biological Characteristics Of Intestinal Probiotics From The Longevity Crowd In Kashi, Xinjiang, Aymihri Mollam, Nusratgul Anwar, Busaram Abliz, Hamida Gulam, Osman Yimit
Food and Machinery
Lactic acid bacteria with probiotic function were isolated and screened from the intestinal track of longevity crowd in Kashi, Xinjiang, and their ability to triglyceride-reducing in vitro were investigated. The results showed that the fourteen of forty-one strains of lactic acid bacteria with high triglyceride-reducing rates, were higher than 15%. Among them, strain A2-1, A1-2, A3-1, A4-6 and A4-1 with higher survival rates s in artificial gastric juice at pH 3.0 were 63.22%，60.01%，58.94%，56.14%，50.29%, respectively. Moreover, the survival rates of these 5 strains in MRS broth with 1, 3 and 5 g/L bile salt were also relatively high, and the survival …
Effect Of Ultrasound Treatment On Pasting, Rheological And Textural Properties Of Pea Starch, Li Wei, Zheng Jiong, Chen Yingheng, Zhang Fusheng
Effect Of Ultrasound Treatment On Pasting, Rheological And Textural Properties Of Pea Starch, Li Wei, Zheng Jiong, Chen Yingheng, Zhang Fusheng
Food and Machinery
Pea starch was used as the raw material, and was treated with ultrasound of 0, 150, 300 and 450 W respectively to explore the effect of the ultrasonic treatment on pasting, rheological and textural properties of pea starch. The results showed that the effects of the ultrasonic treatment on the pasting, rheological and textural properties of pea starch were significant. With the increasing of the ultrasonic power, the peak viscosity, final viscosity, setback value and the breakdown value of the pea starch paste decreased significantly, which showed the cold stability and the thermal stability were improved；the consistency coefficient k of …
Effects Of Enzymeon Physicochemical Properties Of Dough Liquor Extracted From Whole Wheat Mantou Dough, Jiang Zhijian, Liu Liya, Ding Lan, Zhou Sumei, Wang Li
Effects Of Enzymeon Physicochemical Properties Of Dough Liquor Extracted From Whole Wheat Mantou Dough, Jiang Zhijian, Liu Liya, Ding Lan, Zhou Sumei, Wang Li
Food and Machinery
The improved mechanism of steamed bread quality by pentosanase(Pn), glucose oxidase (Gox) and complex enzymes was revealed according to the changes in physicochemical characteristics of the dough liquor. The results showed that both Pn and Gox promoted the yield of the dough liquor, the contents of protein and pentosan in the dough liquor changed significantly, the foaming stability and particle size were significantly improved, and the adsorption membrane of protein became dense in texture. The change of the physicochemi-cal properties of the dough liquor caused by Pn or Gox, especially the improvement of foaming stability, may be one of the …
Simultaneous Determination Of Diafenthiuron And Its Degradation Products In Teas By Dispersive Solid-Phase Extraction And High Performance Liquid Chromatography-Tandem Mass, Xiao Limin, Wang Meiling, Dai Jieyun, Dai Hua
Simultaneous Determination Of Diafenthiuron And Its Degradation Products In Teas By Dispersive Solid-Phase Extraction And High Performance Liquid Chromatography-Tandem Mass, Xiao Limin, Wang Meiling, Dai Jieyun, Dai Hua
Food and Machinery
A simple and efficient method based on QuEChERS and high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) was developed for the determination of diafenthiuron and itss degradation products in tea. The sample was extracted with acetonitrile and cleaned up with QuEChERS. In the chromatographic analysis, three target compounds were separated on a C18 column (150 mm × 4.6 mm, 3.5 μm) with the gradient elution using the mobile phases of acetonitrile and water containing 0.1% acetic acid. The mass analyzer was performed using positive scan mode with MRM monitor using external standard method. The results showed that the limits of …
Rapid Identification Of Lonicerae Japonicae Flos And Lonicerae Flos Based On Hyperspectral Imaging, Feng Jie, Liu Yunhong, Wang Qingqing, Yu Huichun, Shi Xiaowei
Rapid Identification Of Lonicerae Japonicae Flos And Lonicerae Flos Based On Hyperspectral Imaging, Feng Jie, Liu Yunhong, Wang Qingqing, Yu Huichun, Shi Xiaowei
Food and Machinery
In order to identify Lonicerae Japonicae Flos and Lonicerae Flos rapidly and precisely, a hyperspectral imaging technology combined with chemometric methods was applied to develop the nondestructive identification models for Lonicerae Japonicae Flos and Lonicerae Flos. Firstly, the original spectral data were analyzed by three pretreatment methods including Savitzky-Golay (SG) convolution smoothing, Multiple Scatter Correct (MSC) and Standard Normal Variate Transformation (SNV). A comparison was made among SG, MSC and SNV based on Partial Least Squares (PLS), of which the best pretreatment method was SNV. The Regression Coefficient (RC) and Successive Projection Algorithm (SPA) were used to extract the characteristic …
Determination Of Retinol Palmitate And Retinol Acetate In Formulas For Special Medical Purposes Intended For Infants By Hplc, Li Tao, Zhou Yanhua, Sun Guifang, Yang Tao, Yin Weicheng, Yang Qingyi
Determination Of Retinol Palmitate And Retinol Acetate In Formulas For Special Medical Purposes Intended For Infants By Hplc, Li Tao, Zhou Yanhua, Sun Guifang, Yang Tao, Yin Weicheng, Yang Qingyi
Food and Machinery
Retinol palmitate and retinol acetate in formulas for special medical purposes intended for infants was determined using NP-HPLC. The HPLC system consisted of NH2 column (150 mm×4.6 mm, 5.0 μm), mobile phase of n-hexane-25.0% tert-butyl methyl ether n-hexane solution (955), flow rate of 1.0 mL/min, injection volume of 50 μL, column temperature of 30 ℃, UV detector detection wavelength of 325 nm. Results showed that retention time of retinol palmitate and retinol acetate were 3.5 min and 6.0 min, respecitively the linearity was good in the range of 0.05～10.0 μg/mL with a correlation coefficient of 0.999 9, the detection …
Influence Of Different Mode Of Liquid Supply On The Temperature Field Of Evaporated Plate, He Weidong, Wan Jinqing, Huang Minglei, Ge Rui
Influence Of Different Mode Of Liquid Supply On The Temperature Field Of Evaporated Plate, He Weidong, Wan Jinqing, Huang Minglei, Ge Rui
Food and Machinery
This paper studied the temperature distribution of different mode of liquid supply in plate freezer under the same working condition, and analyzed the reasons for the inequality freezing rate of the flat plate. The freezing experiment of the fluid supply with ejector and the expansion valve at the same condense temperature in 35 ℃ was carried out respectively. The results showed that: at the end of freezing, the minimum temperature reached to -35.9 ℃ by using expansion valve, and the maximum temperature difference of frozen products was 17.55 ℃. The temperature difference of each layer was large, and the temperature …
Study On Bacteriostat To Colletorichum Orbiculare Of Muskmelon And Fresh Keeping Effects Of Bio-Liquid, Liu Fangfang, Li Fanzhu, Zhang Xian, Li Min
Study On Bacteriostat To Colletorichum Orbiculare Of Muskmelon And Fresh Keeping Effects Of Bio-Liquid, Liu Fangfang, Li Fanzhu, Zhang Xian, Li Min
Food and Machinery
To develop a new type of fruit and vegetable preservative with low toxicity and harmLess, the bio-liquid was used as the main experimental material, and the antibacterial effects and mechanism of bio-liquid on the Colletorichum orbiculare and the effect on the preservation of muskmelon were studied. The results showed that the bio-liquid had obvious antibacterial effect on the Colletorichum orbiculare, and the EC50 and EC70 ere 1.8% and 2.4%, respectively. The bio-liquid could destroy the membrane structure of the Colletorichum orbiculare and the rupture the cell membrane, which caused the exudation of proteins, nucleic acids, and carbohydrates. Treated …
Extraction Of Podocarpus Nagi Nut Oil And Analysis Of Their Physicochemical Properties, Lu Lulu, Yang Chongwen, Li Chengyong, Sun Shengli, Yan Xiemin, Su Tiantian, Feng Yanting
Extraction Of Podocarpus Nagi Nut Oil And Analysis Of Their Physicochemical Properties, Lu Lulu, Yang Chongwen, Li Chengyong, Sun Shengli, Yan Xiemin, Su Tiantian, Feng Yanting
Food and Machinery
In order to further develop the resources of Podocarpus Nagi, the technology of ultrasonic assisted soxhlet extraction for the extraction of Podocarpus nagi was optimized by single factor and response surface tests. The physicochemical properties and fatty acid composition were analyzed. The results showed that the optimum extraction conditions were as follows: the extraction temperature 75 ℃, the solid-liquid ratio 140 （g/mL）, the extraction time 150 min and extraction solvent n-hexane. Under this condition, the yield of bamboo nut oil was 29.32%. The analysis via GC-MS method showed that nine kinds of fatty acids were detected in the bamboo nut …
Studies On The Extraction Process And Its Stability Of Yellow Pigment From Rosa Sterilis D. Shi, Xie Guofang, Tian Yonglin, Deng Yuling, Zhou Xiaoli, Liu Yongling, Zhao Zhibing, Ma Lizhi
Studies On The Extraction Process And Its Stability Of Yellow Pigment From Rosa Sterilis D. Shi, Xie Guofang, Tian Yonglin, Deng Yuling, Zhou Xiaoli, Liu Yongling, Zhao Zhibing, Ma Lizhi
Food and Machinery
The extraction conditions of yellow pigment from Rosa sterilis D. shi were optimized by extraction agent screening and uniform experimental design, and the effects of light, pH, oxidant, reducing agent, metal ions and sugar on their stability and antioxidant capacity was investigated. The optimum extraction conditions of Camellia oleifera cake were obtained as follows: 80% acetone, the ratio of material to liquid is 116 （g/mL), each time ultrasonic assisted extraction for 3.5 h at 58 ℃, and extraction 2 times. The yellow pigment was unstable in the sunlight, but showing a strong antioxidant capacity. Yellow pigment and its antioxidant capacity …
Extraction Of Insoluble Dietary Fiber From Purple Sweet Potato By Ultrasonic Assisted Enzyme Method And The Determination Of Its Hydroxyl Radical Scavenging Ability, Xue Shan
Food and Machinery
The process of extracting the insoluble dietary fiber (IDF) of purple potato by ultrasonic-assisted enzymatic method was studied, and its antioxidation in vitro was also evaluated. The effect of five factors (ratio of material to liquid, ultrasonic time, ultrasonic power, alpha amylase dosage and enzyme hydrolysis temperature) on insoluble dietary fiber extraction rate were determined. Orthogonal optimization test was carried out on the basis of single factor test, and the antioxidant level of IDF was evaluated by hydroxyl radical (·OH) in vitro. The single factor test showed that among the factors, the enzymolysis temperature played the most significant role on …
Recent Advances In Rapid Detection Techniques Of Fungus Contamination In Dairy Products, Yang Tongxiang, Chang Xiaojing, Wu Kongyang, Fei Peng, Chen Junliang, Tang Haoguo, Liu Lili, Kang Huaibin
Recent Advances In Rapid Detection Techniques Of Fungus Contamination In Dairy Products, Yang Tongxiang, Chang Xiaojing, Wu Kongyang, Fei Peng, Chen Junliang, Tang Haoguo, Liu Lili, Kang Huaibin
Food and Machinery
Fungus and their harmful substances become one of the most serious contamination in food. This article mainly summarizes the researches on the fungus contamination profile and fungus rapid detection techniques in dairy and dairy products in recent years. Comparing the application of traditional detection methods and rapid detection techniques in dairy products, it will improve the rapid detection techniques system and develop new detection system to better monitor the dairy products quality and promote the sustainable and healthy development of the dairy industry.
The Effect Of Enzymatic Hydrolysis On The Stability And Color Of Ginkgo Cloudy Juice, Ni Yang, Fan Liuping, Xu Xuewan
The Effect Of Enzymatic Hydrolysis On The Stability And Color Of Ginkgo Cloudy Juice, Ni Yang, Fan Liuping, Xu Xuewan
Food and Machinery
Ginkgo cloudy juice was produced for investigation in the present study. Orthogonal design was carried out to optimize the hydrolysis conditions of enzymic hydrolysis starch from ginkgo cloudy juice. The results showed that a high hydrolysis degree of 55% could be obtained under the optimum enzymatic treatment conditions: a-amylase dosage of 35 U/g kernel, glucoamylase dosage of 60 U/g kernel, hydrolysis temperature of 65 ℃. Ginkgo cloudy juice with different degree of hydrolysis were prepared by controlling hydrolysis time. The suspension and storage stability and some other physical properties including viscosity, droplet size and Zeta potential were characterized to research …
Study On The Optimization On Direct Compression Of Lycium Ruthenicum Murr. Submicron Powder, Deng Kai, Ding Chenxu, Suo Yourui
Study On The Optimization On Direct Compression Of Lycium Ruthenicum Murr. Submicron Powder, Deng Kai, Ding Chenxu, Suo Yourui
Food and Machinery
Appropriate excipients were selected for direct compression process of Lycium ruthenicum Murr. Tablets according to the powder properties were screened. The influence of different excipients was investigated based on single factor test with hardness, friability and disintegration time as comprehensive scores. Then, through the Box-Benhnken design of response surface method, the best prescription of the direct compression of Lycium ruthenicum Murr was made. The impact of the different environment on tablets quality also was detected. Conclusion: Microcrystalline cellulose SH102, anhydrous lactose, colloidal silicon were selected as excipients. powders was obtained as follows: microcrystalline cellulose SH102 content of 29.56%, anhydrous lactose …
On-Line Determination Of Emergency Pollution Of Deoxynivalenol In Drinking Water By Flow Injection Chemiluminescence, Yang Panpan, Tang Shuze, Wu Shizheng, Li Liang, Teng Jiuwei
On-Line Determination Of Emergency Pollution Of Deoxynivalenol In Drinking Water By Flow Injection Chemiluminescence, Yang Panpan, Tang Shuze, Wu Shizheng, Li Liang, Teng Jiuwei
Food and Machinery
A rapid, simple and sensitive flow injection chemiluminescence (CL) method was developed for the determination of deoxynivalenol in drink water. The method was based on the enhancement effect of deoxynivalenol on the CL reaction of luminol-H2O2 in alkaline medium. The influences of various experimental factors, including sodium hydroxide, luminol, hydrogen peroxide, Tween 80 concentrations were investigated. Under the optimum conditions, the enhanced CL intensity was linearly related to the concentration of deoxynivalenol in the range of 0.001～4.000 mg/L with a detection limit (3σ) of 0.001 mg/L. The precision was calculated by analyzing sample containing 0.2 mg/L deoxynivalenol …
Effect Of Crushing Fineness On The Chemical Properties Of Mulberry Leaves Powder, Li Ling, Ding Xiaowen, Zhao Wei, Zhang Gaojun, Huang Xianzhi
Effect Of Crushing Fineness On The Chemical Properties Of Mulberry Leaves Powder, Li Ling, Ding Xiaowen, Zhao Wei, Zhang Gaojun, Huang Xianzhi
Food and Machinery
The particle size, microstructure and dissolution of functional components of mulberry leaf powder with different fineness were measured. The three kinds of mulberry leaf powder was obtaind, fine powder, micro powder, and superfine powder. Compared with fine mulberry leaf powder, the average particle size of micro mulberry leaf powder and superfine powder decreased by 86.82% and 91.39% respectively. The content of DNJ (1-deoxynojirimycin) increased by 107.86% and 118.75% (P<0.01), and the content of total phenolics increased by 0.40% and 4.91%. Moreover, the content of polysaccharides increased by 18.86% and 36.57% (P<0.01), and the content of flavonoids increased by 28.47% and 31.86% (P<0.05)，with the contents of amino acid nitrogen increased by 20.00 % and 45.00 %. The Soluble dietary and total dietary fiber increased by 3 998.31% and 6 809.12%, 324.84% and 554.92% (P<0.01). Insoluble dietary fiber decreased by 53.31% and 86.59% (P<0.01). Therefore, the fine pulverization increases the amount of the functional properties dissolution.
Effect Of Salt On Safety Indexes Of Sausage Inoculated With Mixed Cultures During Fermentation, Li Jia, Liu Zhongyi, Chen Yu, Luo Xinping, Yang Hui, Li Ping
Effect Of Salt On Safety Indexes Of Sausage Inoculated With Mixed Cultures During Fermentation, Li Jia, Liu Zhongyi, Chen Yu, Luo Xinping, Yang Hui, Li Ping
Food and Machinery
In order to determining the optimum concentration of salt curing and providing a reference for the preparation of fermentation sausage pre-treatment, the pork was salted by four kinds of low salt concentration, then was made into sausages and fermented. The effects of pH, nitrite, TVB-N and microorganisms on the safety of sausage were analyzed and compared by national standard method under various salinity during fermentation. The results showed that lactic acid bacteria was inhibited less inhibitory at 1.5% and 2.0% salt concentration. Number of lactic acid colonies increased rapidly at the first 6 h after fermentation, and increased slowly after …
Comparison Of Physicochemical Properties Between Areca Taro Starch And Ball-Milling Esterification Modified Starches, Liu Cancan, Huang Qun, Sun Xiaopeng, Song Hongbo
Comparison Of Physicochemical Properties Between Areca Taro Starch And Ball-Milling Esterification Modified Starches, Liu Cancan, Huang Qun, Sun Xiaopeng, Song Hongbo
Food and Machinery
The compound modified starch was prepared from the areca taro native starch which was modified by ball-milling combined with octenyl succinic anhydride (OSA). The physicochemical properties of compound modified starch were studied and compared with the native starch, esterified starch and ball-milled starch. The results indicated that the solubility, swelling power and transparency of ball-milled starch were significantly improved (P＜0.05), especially the cold-water solubility, but the anticoagulation, freeze-thaw stability and apparent viscosity were reduced. The solubility, swelling power, transparency, anticoagulation, freeze-thaw stability and apparent viscosity of esterified starch and compound modified starch were significantly improved. It can be seen that …
Test And Analysis On The Picking Force Of Processing Tomato Fruit, Luo Xinyu, Wang Jikui, Luo Yongjun, Luo Wei
Test And Analysis On The Picking Force Of Processing Tomato Fruit, Luo Xinyu, Wang Jikui, Luo Yongjun, Luo Wei
Food and Machinery
As fruit picking must overcome the connection force between fruit stalk and fruit, the tensile force and torsion moment of tomato picking were measured by test for revealing the size and its change of tomato fruit picking force during tomato fruit picking practice.The test results show that the size of the ripe processing tomato picking force is related to the movement direction of the fruit in picking operation. When the fruit is moving in a direction, the picking force is smaller with the tilting angle of the stalk being greater, the force of tomato fruit picking has a linear correlation …
Optimization On The Enzymatic Preparation Of Extracellular Polysaccharide From Porphyridium Creuntum With Antioxidant Activities In Vitro, Dong Le, He Jingyan, Zheng Tingting, Dai Congjie, Huang Weihong, Li Yuanyue
Optimization On The Enzymatic Preparation Of Extracellular Polysaccharide From Porphyridium Creuntum With Antioxidant Activities In Vitro, Dong Le, He Jingyan, Zheng Tingting, Dai Congjie, Huang Weihong, Li Yuanyue
Food and Machinery
The optimum enzymatic conditions of extracellular polysaccharide of Porphyridium creuntum (EPS) were investigated in this research. Based on the results of single factor experiment, by using the Box-Behnken response surface method array design, the optimum conditions for hydrolyzing EPS to obtain antioxidant hydrolysates with the highest hydroxyl radical scavenging activity were as follows: enzymolysis reaction time 6.3 h, enzymolysis reaction pH 8.0, enzymolysis temperature 63 ℃, and enzyme-to-substrate ratio 2.7 U/mg. Under the conditions, the scavenging rate of hydroxyl radical was 70.64%. Subsequently, the antioxidant activity of the enzymatic hydrolysates were determined in vitro. The results showed that the enzymatic …
Expression Of Humicola Insolens Cutinase In Escherichia Coli And Its Optimization Of Fermentation, Sun Yirong, Wu Jing, Su Lingqia
Expression Of Humicola Insolens Cutinase In Escherichia Coli And Its Optimization Of Fermentation, Sun Yirong, Wu Jing, Su Lingqia
Food and Machinery
Cutinase is a kind of multifunctional hydrolase, which has important application value in the food processing and textile refining industry. The recombinant expression system of Escherichia coli (E.coli) BL21 (DE3) was used to achieve the recombinant expression of Humicola insolens cutinase in E.coli, and the activity of extracellular supernatant in shaking flask level reached 170 U/mL. The recombinant cutinase was characterized. The optimum pH was 8.5, the optimum temperature was 80 ℃, with good pH stability and temperature stability. In order to further improve the possibility of the industrial application of H.insolens cutinase, the recombinant E.coli was cultured in 3 …
Effects Of Mango Peel Powder On The Gelatinization And Retrogradation Properties Of Starch, Liu Fangmei, Wang Kai, Luo Jin, Zhao Lei, Hu Zhuoyan
Effects Of Mango Peel Powder On The Gelatinization And Retrogradation Properties Of Starch, Liu Fangmei, Wang Kai, Luo Jin, Zhao Lei, Hu Zhuoyan
Food and Machinery
Brabender viscometer and differential scanning calorimetry were used to study the effects of mango peel powder (MPP) on the pasting and thermal properties of corn and rice starch. Moreover, the changes in the transmittance, sedimentation rate, gel hardness and color of the two kinds of starch were also analyzed, and thus impacts on starch gelatinization and retrogradation were evaluated. The results showed that with the increase in the amount of added mango peel powder (0%～15%), the pasting temperature of corn and rice starches were decreased, while breakdown values were increased. Corn starch showed the highest peak viscosity with the addition …
Main Nutritional Quality And Principal Component Analysis Of Bramley Apples With Different Pollination Varieties, Ding Qian, Shi Yu, Zhen Runying
Main Nutritional Quality And Principal Component Analysis Of Bramley Apples With Different Pollination Varieties, Ding Qian, Shi Yu, Zhen Runying
Food and Machinery
The differences of the main nutrient quality of bramley apples under different pollination conditions respectively with the pollen of First red, Dahongrong, MOLEX, Red Fuji, Gala and Grieve were analyzed in this experiment, and the natural pollination was used as control. The results showed that the contents of total sugar, VC, flavonoids, protein, ash and polyphenols among bramley apples with different pollination varieties reached significant or extremely significant levels; three principal components be selected in this experiments, and the cumulative percent of that three principal components reached 85.072% respectively. It was considered that pollination varieties could affect the nutritional quality …