Improvement In Methods For Activity Measurement Of Polyphenol Oxidase In Wheat,
2015
Hunan Zhenhua Academy of Food Detection and Research, Changsha, Hunan 410000, China
Improvement In Methods For Activity Measurement Of Polyphenol Oxidase In Wheat, Zhou Xiaoling, Yang Daiming, Li Na
Food and Machinery
Three wheat varieties were selected as experimental materials to measure the activity of polyphenol oxidase According to the method from Measurement of Polyohenol Oxidase Activity in Wheat Flour in national standard draft. And found it has three deficiencies: first, because of the lack of crude extcation of polyphenol oxidase, it led to the less quantity of polyohenol oxidase, and couldn’t reflect the real state of the activity of polyphenol oxidase; second, because of the unsuitable reaction temperature, it couldn’t help the enzyme reaction completely; third, adding catechol before centrifuge made a part of product intercepted by precipitation, thus it has …
Changes On Sugar Profiles In Honey During Ripening,
2015
College of Food Science and Biotechnology, Zhejiang Gongshang University,Hangzhou,Zhejiang 310018, China; Food Safety Key Laboratory of Zhejiang Province,Hangzhou,Zhejiang 310018, China
Changes On Sugar Profiles In Honey During Ripening, Xu Xian, Gu Zhenyu
Food and Machinery
To find the rules on honey during ripening and obtain the special indicators, the physicochemical parameters and sugar profiles were studied. Moisture, soluble solids, pH, acidity, and conductivity were detected according to national standards. Sugar profiles of different storage time in hive, one day, two days, four days, six days and which was completely ripened were isolated and identified by HPLC—ELSD. Analysis of variance (ANOVA) showed that there were significant differences in honey of different storage time in hive; while the principal component analysis(PCA) showed that fructose, trehalose, glucose, maltulose, erlose were the major factors causing this difference. So the …
Recognition Of Fresh Orange Juice Adulteration By Electronic Tongue,
2015
Department of Food Science, Sichuan Tourism University, Chengdu, Sichuan 610100, China
Recognition Of Fresh Orange Juice Adulteration By Electronic Tongue, Zhang Miao, Jia Hongfeng, Li Xiexin, Wang Xi
Food and Machinery
The recognition of adulteration in fresh orange juice was performed by electronic tongue system. The raw data were analyzed by using principal component analysis (PCA),discriminant fact analysis (DFA) and partial least-squares analysis (PLS). DFA was more competent than PCA in distinguishing effect. It appeared regularity with the increasing proportion of adulterated samples. It had a high correlation between electronic tongue sensors response signals and the adulteration ratio of fresh orange juice, the correlation coefficient was 0.963 8, the prediction error of established PLS model ranged from 1.85% to 2.20%. It proved that electronic tongue could be applied in adulteration recognition …
Acetaldehyde Analysis Of Beverage Plastic Bottle And Control Measures,
2015
College of Light Industry and Food Sciences, South China University of Technology, Guangzhou, Guangdong 510640, China
Acetaldehyde Analysis Of Beverage Plastic Bottle And Control Measures, Ai Li, Chen Changsong
Food and Machinery
The method of gas chromatography was used on acetaldehyde detection, and the data was analyzed, from the PET raw material to plastic bottles. According to the practical control measures, it was proved that the impact of plastic bottle on human body is in a controllable state.
Study On Detecting Method Of Preservative In Injecta,
2015
College of Chemistry and Environmental Science, Guizhou Minzu University, Guiyang, Guizhou 550025, China
Study On Detecting Method Of Preservative In Injecta, Yan Min, Wang Lixiong, Tian Renkui, Bai Yizhang
Food and Machinery
HPLC and GC—MC methods determining several preservatives in injecta was studied. When HPLC method was conducted, with conditions of streaking under 230 nm wavelength for VWD UV detection and 50︰50 proportion of methanol and water in the mobile phase, the peak with obvious trailing were undesirable. while, using GC—MS method, the response value and separation efficiency were better than that of HPLC and the preservatives were easy to be qualitatively and quantitatively determined. Results: It was quick and easy to determine peak occurrence and separation effects preservatives in injecta with the GC—MS method. The linearity of peak area and concentrations …
Determination Of Suxamethonium Chloride In Meat By Hplc—Ms／Ms Method,
2015
Hunan Research Institute of Food Quality Supervision and Testing, Changsha, Hunan 410117, China
Determination Of Suxamethonium Chloride In Meat By Hplc—Ms／Ms Method, Zhou Xingwang, Kang Shaoying, Zhang Jihong, Zou Qiao
Food and Machinery
Suxamethonium chloride in dog meat was extracted by ultrasonic vibration with Na2CO3—NaHCO3 buffer solution，then the supernatant was cleaned-up using WCX solid phase extraction cartridges. The qualitative and quantitative analysis for target was achieved by liquid chromatography-tandem mass spectrometry. The study showed that the suxamethonium chloride concentration had a good linear relationship (r=0.999 87)with mass signal ranging from 0.5～250.0 ng/mL. The recovery was above 96%. The relative standard deviation was below 13%. The limit of determination was 0.004 mg/kg. This is a rapid, sensitive, accurate method for determinating suxamethonium chloride in dog meat.
3d Modeling Of Polygon Rotating Metal Shell Based On Creator,
2015
Department of Information Engineering, Guangxi Economic & Trade Polytechnic, Nanning, Guangxi 530021, China
3d Modeling Of Polygon Rotating Metal Shell Based On Creator, Qin Haining, Miao Xiaobin
Food and Machinery
Polygon rotating metal shell 3D model commonly used in the design of aircraft, such as underwater vehicle model. The appearance of the metal shell has irregularity, texture feature is complex, the need for real-time rendering in the process of sailing, the traditional three-dimensional modeling method for polygon the lifelike three-dimensional modeling of the rotating metal shell is not good, gloss is not strong. A polygon based on Creator rotating metal shell 3D modeling method was established. Build a polygon choose metal shell structure parameters of the system, using background difference continuous reconstruction method for 3D reconstruction algorithm is improved, the …
Design Of Automatic Grading Control System Of Crab And Its Control Program Based On Image Recognition,
2015
Taizhou Polytechnical College, Taizhou, Jiangsu 225300, China
Design Of Automatic Grading Control System Of Crab And Its Control Program Based On Image Recognition, Zhu Yan, Cao Yuanjun, Li Shusheng
Food and Machinery
Traditional classification method for crab by artificial to distinguish its gender and by eyes to estimate its weight, so the classification efficiency and accuracy are lower. The gender identification base on image recognition technology is implemented with the LABVIEW software platform. The identification result is transmitted to the S7-200 controller by OPC communication technology, at the same time the weight of the calibration of crab is implemented by weighing sensor. The control system of automatic classification is finally implemented with the classification indexes of weight and gender, the recognition accuracy of this system is about 95%.
An Automatic Loading And Unloading Device Of Coconut Stripping Clothes Dryer,
2015
Hainan University Electrical and Mechanical College, Haikou, Hainan 570228, China
An Automatic Loading And Unloading Device Of Coconut Stripping Clothes Dryer, Zhang Zhiqiang, Fan Junqing, Geng Xiu
Food and Machinery
According to the coconut husking machine, studies the working principle of automatic loading and unloading device of coconut husking machine. The design contains controlling order fall of coconut by hopper，putting coconut right by rotary drum，grabbing coconut by manipulator，the automatic control system of device and conducting experimental verification. The result of experiment proves that the automatic loading and unloading device of coconut husking machine is feasible. The whole process achieves automatic and high efficiency, meeting the demand of sending coconut for husking machine.
Effect Of Prepreg Solution With Different Ph Values On Color Changes Of Peach Juice,
2015
Jiangsu Province Key Laboratory of Advanced Food Manufacturing Equipment and Technology, Wuxi, Jiangsu 214122, China; School of Mechanical Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
Effect Of Prepreg Solution With Different Ph Values On Color Changes Of Peach Juice, Chen Haiying, Wu Fengfeng, Cui Zhengwei, Tia Nyaoqi, Song Feihu
Food and Machinery
Effect of prepreg solution with different pH values (3.2, 3.6, 4.0, 4.4, 4.8) on the color changes of peach juice was studied. Several color parameters, including lightness (ΔL), redness (Δa), yellowness (Δb), total color difference (ΔE) and chroma (ΔC), were detected when the peach juice was kept in a sealed container at the ambient temperature for different time. Compared to the control samples, the color of peach juice changed slightly after impregnating in citric acid-sodium citrate buffer with pH 4.4 and 4.8 （especially pH 4.8）for 30 min. After impregnating in pH 4.8 buffer solution，the ΔL value decreased from -3.16 to …
Quick Discrimination Of Storage Periods For Muscat Grape Based On Electronic Nose,
2015
College of Biotechnology and Food Science, Tianjin University of Commerce Tianjin, Tianjin 300134, China; Key Laboratory of Food Biotechnology, Tianjin 300134, China
Quick Discrimination Of Storage Periods For Muscat Grape Based On Electronic Nose, Chen Chen, Lu Xiaoxiang, Zhang Peng, Chen Shaohui, Li Jiangkuo
Food and Machinery
The aim was to establish a rapid discrimination method of Muscat grape during storage based on the electronic nose technology. Samples of different storage time stored in 10, 0 ℃ were detected using PEN3 electronic nose system, operating loadings contribution rate analysis of sensors, principal component analysis, linear discriminant analysis to distinguish the storage period, establishing of the discriminant model, and then compared the prediction power of Mahalanobis distance, Euclidean distance, correlation, discriminant function analysis method by unknown samples. At the same time, the rate of good fruit, soluble solids content, total acid content, VC content, hardness index were …
Effects Of 3 Food Additives On Anti-Aging In Wet-Fresh Noodles,
2015
Grain and Oil Processing and Quality Control of Collaborative Innovation Center in Hunan Province, Changsha, Hunan 410004, China; Food Science and Engineering, Central South Forestry University of Science and Technology University, Changsha, Hunan 410004,
Effects Of 3 Food Additives On Anti-Aging In Wet-Fresh Noodles, Xiao Dong, Zhou Wenhua, Deng Hang, Huang Yang
Food and Machinery
The fresh-wet noodle was easily aging during the shelf period for the high moisture content. In order to decrease the process of aging, 3 kinds of additives, for guar gum, Sodium stearyl lactate(SSL) and Soluble soybean-polysaccharide (SSPS), were studied, and the texture and sensory evaluation were analyzed. Result: Taking the hardness of fresh-wet noodle as the aging index, with the addition quantities of additives, ratio of additive to flour, guar gum of 0.2%, SSPS of 0.1%, SSL of 0.2%, the hardness of fresh wet noodle is the lowest; The indexes, such as hardness, viscosity, and chewiness, which analyzed by the …
Studies On Extraction And Molecular Properties Of Gualou Seed (Semen Trichosanthis) Protein Prepared From By-Products,
2015
Department of Food and Biological Engineering, Changsha University of Science and Technology, Changsha, Hunan 410114, China
Studies On Extraction And Molecular Properties Of Gualou Seed (Semen Trichosanthis) Protein Prepared From By-Products, Li Xianghong, Li Min, Liu Yongle, Yu Jian, Wang Faxiang, Wang Jianhui
Food and Machinery
In present study, Gualou seed proteins were extracted from its by-products, and the molecular properties of the proteins were also observed. The results showed that the Gualou seed proteins mainly consisted of salt-soluble protein (55.3% of extracting yield) and alkali-soluble protein (15.8% of extracting yield), and the alkali-soluble protein may be linked with pigments because the protein solution appeared to be dark brown. Sodium dodecyl sulfonate-polyacrylamide gelelectrophoresis analysis was used to test the subunit molecular weight distribution and the result revealed that subunits of salt-soluble and alkali-soluble proteins mainly distributed from 10 to 32 kDa. The molecular weight distribution of …
Effect Of Peel Reutilization On Quality Of Essential Oil From Orange (Citrus Sinensis Var. Valencia) Peel After Rubbing Peel,
2015
Hunan Agricultural Product Processing Institute, Changsha, Hunan 410128, China
Effect Of Peel Reutilization On Quality Of Essential Oil From Orange (Citrus Sinensis Var. Valencia) Peel After Rubbing Peel, Liang Zengenni, Fu Fuhua, Shang Xuebo, He Shuang, Shan Yang
Food and Machinery
To study on utilization of residual orange peel in industrial production and increase of essential oil yield from orange peel, essential oil from yellow juice and residual orange peel were extracted inCitrus sinensis var. Valencia using steam distillation after grinding peel. Then the yield of essential oil extracted from yellow juice and residual orange peel was measured and their compounds were compared, andessential oilextracted from tangerine peel and tangerine endocarp were used as control. The results shows that the essential oil yield from orange peel can be increased (11.55%) by recycling residual orange peel, and the compounds of essential oil …
Inhibiting Effect Of Stachyose From Stachys Floridana Schuttl.Ex Benth On Proliferation Of Caco-2 Cell Line And Its Potential Mechanism,
2015
Affiliated Hospital of Jiangnan University, Wuxi, Jiangsu 214062, China
Inhibiting Effect Of Stachyose From Stachys Floridana Schuttl.Ex Benth On Proliferation Of Caco-2 Cell Line And Its Potential Mechanism, Zhong Xianfeng, Huang Guidong, Zhang Jiru, Zhang Yong, Hua Dong
Food and Machinery
The inhibiting effect of stachyose from Stachys floridana Schuttl.ex Benth on the proliferation of Caco-2 cell line and its potential mechanism were investigated.Caco-2 cells were incubated in serum-free media, the inhibiting effect of stachyose on Caco-2 cell proliferation were analyzed by MTT assay and the apoptosis of Caco-2 cells were determined by flow cytometry, then cell damage degree was studied by the detection of LDH release rate. The results showed that stachyose inhibited the proliferation of Caco-2 cell lines in a dose- and time- dependent manner. After pretreatment with different concentrations of stachyose (0.5, 1, 2, 4 mmol/L), cell apoptosis …
Effects Of Drying Methods On Antioxidant Activities And Reducing Capacity Of Polysaccharides Extracted From Onchidium Struma,
2015
Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Shanghai Ocean University, Ministry of Education, Shanghai 201306, China
Effects Of Drying Methods On Antioxidant Activities And Reducing Capacity Of Polysaccharides Extracted From Onchidium Struma, Cheng Zhiqing, Shen Heding, Yao Lixiang, Diao Ya
Food and Machinery
The polysaccharide of Onchidium struma was extracted by using traditional hot water extraction and alcohol precipitation method，the influence of vacuum freeze drying and oven drying on the antioxidant activity of polysaccharides was investigated. The antioxidant activities of the polysaccharide was evaluated by scavenging DPPH free radical, hydroxyl free radical, surperoxide anion radical and sodium nitrite, and the total reducing capacity of polysaccharide was studied by spectrophotometric method. The results showed that the scavenging effect of freeze dried polysaccharide was stronger than the oven dried polysaccharide,the IC50 for scavenging activities against DPPH free radical, hydroxyl and sodium nitrite were 4.14, …
Antioxidant Activity Of Capsaicin In Vitro,
2015
National Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Hunan Agriculture University, Changsha, Hunan 410128, China
Antioxidant Activity Of Capsaicin In Vitro, Liu An, Wang Zhen, Liu Linfeng, Xiang Yi, Xiao Wenjun
Food and Machinery
The antioxidant activity of capsaicin was evaluated through building antioxidant experiment model in vitro, taking capsaicin monomer as standard sample, and Vc as the contrast. By analyzing the reducing power of capsaicin and scavenging experiments on the DPPH radical, superoxide anion radical (O-2·), nitroso and hydroxyl radical (·OH), discussed capsaicin the antioxidant properties. The results showed that: reducing power of capsaicin increased with mass concentration increasing, and the DPPH radical, nitroso and clearance rate of ·OH with mass concentration increasing, and the scavenging effect and Vc basically similar, but with lower clearance to O-2·; the clearance of capsaicin to DPPH·, …
Ultrasonic-Assisted Two-Phase Aqueous Extraction And Antioxidant Activity Of Polyphenols From The Seed Of Synespalum Dulcificum,
2015
College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, Hainan 571127, China
Ultrasonic-Assisted Two-Phase Aqueous Extraction And Antioxidant Activity Of Polyphenols From The Seed Of Synespalum Dulcificum, Ma Yidan, Liu Hong, Liao Xiaowei, Yan Ruixin, Qi Jinling
Food and Machinery
The seed of Synespalum dulcificum was untrasonified in the acetone-(NH4)2SO4 aqueous two-phase syetem to extract total polyphenils and different conditions for extraction of polyphenols antioxidant activity was investigated. Acetone was chosen as the best extraction solvent for this research. The acetone concentration, amount of the (NH4)2SO4, the ultrasonic time，extraction temperature, ratio of water to solid were discussed by the single factor experiment. The optimal extraction conditions were found to be: the concentration of acetone solution 50%, ultrasonic time 100 min and extraction temperature 60 ℃，ratio of water to solid …
Study On Optimal Conditions For Extracting Alkaloids From Areca Catechu Based On Multistage Cross Flow Extraction,
2015
College of Food Science and Technology, Hunan Agricultural University, Changsha, Hunan 410128, China
Study On Optimal Conditions For Extracting Alkaloids From Areca Catechu Based On Multistage Cross Flow Extraction, Gao Xiaoting, Yang Dawei, Jiang Chenfeng
Food and Machinery
In order to optimize the extraction process of alkaloids from areca catechu, the alkaloids was extracted by varied extraction solvent systems from areca catechu shell and the optimal extraction solvent was explored. According to the theoretical formula of multistage cross flow extraction, solid to liquid ratio and extractive grades was designed. Based on the results of single-factor test, the effect of extraction temperature, extraction time, pH value on extraction rate were conducted by orthogonal test of interaction. The result showed that the extraction rate of alkaloids was 7.241 7 mg/g under the optimal conditions: taking water as the solvent, solid …
Nutritional Benefits Of European Plums (Prunus Domestica L.),
2015
Institute of Food Science and Technology, Fuzhou University, Fuzhou, Fujian 350108, China
Nutritional Benefits Of European Plums (Prunus Domestica L.), Liu Zhibin, Feng Jiangduo, Zhang Wen, Ni Li
Food and Machinery
European plum (Prunus domestica L.) and its dried products, commonly known as prune, are widely consumed in Unite States, European countries and worldwide. European plum, which is rich in polyphenols and other phytochemicals, possesses high nutritional values. This review summarizes the findings of published studies which examine the nutritional benefits, including antioxidant activity, the protection effect on cardiovascular system, anti colon cancer activity, relieving constipation effect and bone health improvement effect of European plum.
