Ability Of Acid And Bile Salt Resistance Of Lactic Acid Bacteria And Its Cholesterol Lowering Effect From Human Origin,
2017
College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China; Key Laboratory of Dairy Biological Technology and Safety Control, Yangzhou, Jiangsu 225009, China
Ability Of Acid And Bile Salt Resistance Of Lactic Acid Bacteria And Its Cholesterol Lowering Effect From Human Origin, Chen Dawei, Gu Ruixia, Lu Maolin, Huang Yujun, Zhang Chenchen, Guan Chengran, Zhang Yulu, Fan Chenyu
Food and Machinery
Lactic acid bacteria (LAB) with ability of acid and bile salt resistance were isolated from the feces of the longevity population in Rugao by using selective medium, artificial gastric juice and bile salt medium, and the ability of cholesterol reducing and manner were studied. The results showed that the survival rate of all isolated 60 strains of LAB in the pH 3.0 artificial gastric juice was more than 30%, the LAB from the middle-aged group, elderly group and longevity group was significantly higher than that in the youth group (P＜0.05); the survival rate of LAB in the 0.3% and 0.5% …
Isolation And Identification Of Lactic Acid Bacteria From Fermented Vegetables And In Vitro Resistance Screening,
2017
College of Food Sciences, Southwest University, Chongqing 400715, China
Isolation And Identification Of Lactic Acid Bacteria From Fermented Vegetables And In Vitro Resistance Screening, Zhou Xianrong, Lan Lingxia, Tang Yanyan, Huang Shenglan, Li Yuzhu, Yu Lihong, ZalN Zsolt, Zhao Xin, Du Muying
Food and Machinery
This study aimed to isolate lactic acid bacteria containing in vitro resistance ability from Sichuan fermented vegetables. Five strains of Lactobacillus were isolated from fermented vegetables and analyzed by 16S rDNA. Four strains of them were Lactobacillus plantarum, named as E-6-1, E-1-2, E-6-3, D-2-3 respectively, and another one was Lactobacillus alimentarius, named as C-2-1. The in vitro resistance of the 5 strains was determined by artificial gastric juice and bile salt. The results showed that the lactic acid bacteria numbered D-2-3 had good anti-artificial gastric juice ability, and the survival rate was 95.38% after 3 h of artificial gastric juice …
Analyzing Of Bacterial Diversity Involved In Aspergillus-Type Douchi By 454 Pyrosequencing,
2017
Hunan Provincial Key Laboratory of Food Science and Biotechnology, Changsha, Hunan 410128, China; College of Food Science and Technology, Hunan Agricultural University, Changsha, Hunan 410128, China
Analyzing Of Bacterial Diversity Involved In Aspergillus-Type Douchi By 454 Pyrosequencing, Li Shirui, Shi Cong, Jiang Liwen, Liao Luyan, Zhou Hongli, Li Pao
Food and Machinery
The changes of bacterial diversity in eight stages of Aspergillus fermented bean curd fermentation were determined by 454 high-throughput pyrosequencing technique. The changes and diversity of bacterial community at different stages were studied. The results showed that the similarity of the major microorganisms in different samples at the two levels was high, with a total of more than 90% of the total, including three types of Phytophagous, Proteobacteria and Actinomycetes. The samples with the highest level of homogeneity were HY04, and 31 major genera were found in it. It was also found that the abundance of Weissella, Bacillus, Staphyloco-ccus, Lactococcus, …
Identification Of 4 Polyphenolics From Seeds Extracts Of Camellia Semiserrata Chi.,
2017
Faculty of Food Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan 410004, China
Identification Of 4 Polyphenolics From Seeds Extracts Of Camellia Semiserrata Chi., Wang Weijie, Cao Qingming, Lan Fang, Wang Wenfei, Bao Liyuan
Food and Machinery
To comprehensively develop and utilize Camellia semiserrata resources, compounds of ethanol extract of Camellia semise-rrata Chi. cake were separated and identified. Five purified compounds were achieved by HPLC preparation from 4 fractions including XVII, XXVI, XXVIII and XXXIV by ethyl acetate extraction and silica gel column chromatography. The analysis of compound 4 has been reported in another paper. Four compounds were identified as protocatechoic acid (1), apigenin-6-C-β-D-glucopyranoside (2), kaempferol-3-O-\[α-L-rhamnopyranosyl-(1-3)-2,4-di-O-acetyl-α-L-rhamnopyranosyl-(1-6)\]-β-D-glucopyranoside (3), and kaempferol-3-O-\[α-L-rhamnopyranosyl-(1-3)-2,4-di-O-acetyl-α-L-rhamnopyranosyl-(1-6)\]-β-D-glucopyranoside (5) by spectral analysis, among which, compounds 3 was the first time reported in the Camellia genus, and compounds 5 was firstly reported in Camellia semiserrata Chi., The …
Screening And Safety Evaluation Of Lactic Acid Bacteria Producing Fibrinolytic Enzyme,
2017
College of Food Sichuan Agriculture University, Ya’an, Sichuan 625014, China
Screening And Safety Evaluation Of Lactic Acid Bacteria Producing Fibrinolytic Enzyme, Yin Mengwen, Zhou Qian, Lei Chan, Hu Xinjie
Food and Machinery
In this study, 2 strains of Enterococcus faecalis HYD09 and HYN06 isolated from traditional fermented food were used to determine the enzyme activity of fermentation supernatant, and evaluate the basic safety of the strains. The safer strain were tested for gastrointestinal viability; meanwhile, the fermentation supernatant was subjected to protease; the crude enzyme was obtained from the fermentation broth and its activity was measured by Native-Page. The results showed: the enzyme activities of HYD09 and HYN06 fermentation supernatant were 115.3 U/mL and 107.2 U/mL, respectively; HYD09 and HYN06 indole test, nitrate reductase assay, amino acid decarboxylase test hemolysis test were …
Optimal Cultivation Conditions For Streptococcus Salivarius Bd3900 To Express Substances Capable Of Inhibiting Streptococcus Mutans Biofilm Formation,
2017
State Key Laboratory of Dairy Biotechnology, Shanghai 200436, China; Shanghai Engineering Research Center of Dairy Biotechnology, Shanghai 200436, China
Optimal Cultivation Conditions For Streptococcus Salivarius Bd3900 To Express Substances Capable Of Inhibiting Streptococcus Mutans Biofilm Formation, Yu Yanan, Wu Zhengjun, Han Jin
Food and Machinery
In order to increase the metabolites of the strain BD3900 inhibiting the S. mutans biofilm formation, the inhibition rate of biofilm formation by Streptococcus mutans was used as indexes. The effects of the cultivation time and temperature, the carbon resources, the concentration of sucrose and the inoculum amount were investigated. The results showed that optimal cultivation conditions were composed of a cultivation period of 16 h, a cultivation temperature of 34 ℃, and a sucrose concentration of 1 g/100 mL. Under the optimized cultivation conditions, the inhibitory ability of the strain BD3900 on the formation of S. mutans biofilm was …
Relationship Of Potato Starch Granule And Its Enzymatic Hydrolysis Properties,
2017
State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China; NationalEngineering Laboratory for Cereal Fermention Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
Relationship Of Potato Starch Granule And Its Enzymatic Hydrolysis Properties, Zhan Jinling, Sun Binghua, Xie Yayun, Jin Zhengyu, Tian Yaoqi
Food and Machinery
Mechanical pulverization was generally used to fractionate starch granules, but this method produced broken starch granules, thus resulting in the difficulties in finding the relationship between particle size of starch granule and hydrolysis efficiency by enzymes. Therefore, a sedimentation method based on stokes law was developed to produce unbroken starch granules with different particle sizes. The results showed that four sizes of starch granules were obtained and their average equivalent particle diameters were 17.39, 25.81, 38.77, and 56.53 μm, respectively. Furthermore, smaller starch granules possessed large specific surface and exhibited higher hydrolysis rate. A negative correlation was observed between granule …
Study On The Quality Change Of Soybean Oil In The Frying Process Of Chicken Rice,
2017
Key Laboratory for Food Science and Engineering of Heilongjiang Province, Harbin University of Commerce, Harbin, Heilongjiang 150076, China
Study On The Quality Change Of Soybean Oil In The Frying Process Of Chicken Rice, Zhang Gensheng, Wang Rui, Yue Xiaoxia, Zhang Honglei, Chi Tianqi
Food and Machinery
To soybean oil as the main raw material, chicken for the fried food. The effects of different frying time, frying temperature and the quality of each batch of fried chicken on the quality of soybean oil were studied by measuring the physical and chemical indexes, including color, acid value, peroxide value, carbonyl valence price and polar component of soybean oil. Moreover, the low-frequency nuclear magnetic resonance imaging (MRI) technology was used to verify the physical and chemical indicators. The results showed that the color, acid and carbonyl value of the frying oil increased with the frying time, temperature and the …
Enzyme-Linked Sensitization Biosensor Detection Of Bisphenol A In Food Matrix Based On Magnetic Nanomaterials,
2017
School of Chemistry and Biological Engineering, Changsha University of Science & Technology, Changsha, Hunan 410114, China
Enzyme-Linked Sensitization Biosensor Detection Of Bisphenol A In Food Matrix Based On Magnetic Nanomaterials, Xu Zhou, Tang Yao, Wang Rong, Chen Maolong, Wen Li, Cheng Yunhui
Food and Machinery
A horseradish peroxidase enzyme-sensitized detection platform based on functionalized magnetic nanoparticles and gold nanoparticles was established with the nanomaterials as the carrier and the bisphenol A aptamer and the complementary strand as the biometric recognition unit. The method about rapid pretreatment and trace detection of bisphenol A in food matrix was established. The BPA aptamer binding to the magnetic nanomaterials could compete with the complementary strands of the aptamer and the horn root peroxidase (HRP) modified gold nanoparticles. The effect of HRP on the catalytic hydrolysis of the substrate resulted in the change of characteristic peaks at 450 nm, helping …
Prediction Of Moisture Content Of Noni Fruit Powder By Freeze-Drying Process Based On Plsr And Infrared Spectroscopy,
2017
Haikou Key Laboratory of Research and Development on Topical and Special Medicine and Edible Plant, Haikou, Hainan 571127, China; College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, Hainan 571127, China
Prediction Of Moisture Content Of Noni Fruit Powder By Freeze-Drying Process Based On Plsr And Infrared Spectroscopy, He Yunxiao, Zhang Xiaoqing, Zhang Yang, Liu Hong
Food and Machinery
Noni powders with the moisture content of 15.33% were prepared from fresh noni fruit by spray drying, then vacuum freeze drying to obtain samples with moisture content (0.44%～9.00%) by different dying time respectively. Then the model between IR and water content of all samples with partial least squares regression (PLSR) was established. The results showed that IR absorption peak of water appeared about 1 640 cm-1, and the absorption peak was influenced by the freeze drying time. PLSR model with moisture content in range of 0.44%～9.00% in the noni fruit powder was also built, and the square of …
Research On Non-Destructive Methods For Soluble Solid Content Detection Of Astringent Persimmon Based On Near-Infrared Hyperspectral Technology,
2017
College of Mechanical and Electronic Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
Research On Non-Destructive Methods For Soluble Solid Content Detection Of Astringent Persimmon Based On Near-Infrared Hyperspectral Technology, Wei Xuan, He Jincheng, Ye Dapeng, Jie Dengfei
Food and Machinery
This study collected the near infrared (NIR) hyperspectral images of 150 astringent persimmons, with the spectra are in 900~1700 nm. Monte Carlo-uninformative variable elimination (MC-UVE) algorithm and successive projections algorithm (SPA) were adopted to the optimization of wavelengths obtained from the region of interest (ROI). Eight wavelengths were selected by MC-UCE-SPA. These feature wavelengths were 924.69, 928.05, 1 112.72, 1 270.91, 1 365.3, 1 402.42, 1 453.06 and 1 547.69 nm, respectively. The spectral reflectance of the 8 feature wavelengths were applied to establish the detective model for the soluble solid content (SSC) of persimmon by partial least squares regression …
Rapid Quantitative Detection Of Trehalose Syrup Component Based On Near Infrared Spectroscopy,
2017
College of Chemistry and Biology, Changsha University of Science and Technology, Changsha, Hunan 410114, China
Rapid Quantitative Detection Of Trehalose Syrup Component Based On Near Infrared Spectroscopy, Zheng Ruina, Xie Ding, Yang Qianyuan
Food and Machinery
A rapid detection method of using the near-infrared spectra（NIRS）to determine the concentration of syrup (trehalose, maltose and glucose ) in producing trehalose by synthase was established. The 65 NIRS samples of trehalose syrup were divided into a calibration set of 48 samples and a prediction set of 17 samples. Calculation results showed that the first derivative and savitzky-golay filter pretreatment is optimal, and the partial least squares (PLS) was more robust and predictive than the principal component regression (PCR) in building model by TQ analyst. Using PLS, 1D and savitzky-golay filter combination pretreatment model could not only reduce the background …
Determination Of Hydrazodicarbonamide In Bread By High Performance Liquid Chromatography In Tandem Atmospheric Pressure Chemical Ionization Source Mass Spectrometry,
2017
Shanxi Entry-exit Inspection and Quarantine Bureau, Taiyuan, Shanxi 030051, China
Determination Of Hydrazodicarbonamide In Bread By High Performance Liquid Chromatography In Tandem Atmospheric Pressure Chemical Ionization Source Mass Spectrometry, Zhao Youyou, Hua Jin, Gao Yuanhui, Zhang Qi, Guo Haiqian, Zhang Xinxin, Yang Puchen
Food and Machinery
A method of determining the content of hydrazodicarbonamide(HDC) in bread by high performance liquid chromatography in tandem atmospheric pressure chemical ionization source mass spectrometry (HPLC-APCI-MS) was established. Using 80 ℃ water as extractant, N-hexane extraction was used to remove sample impurities. And then the samples purified were separated by using Xbridge BEH Prep OBD Amide column. The gradient elution was performed by using wateracetonitrile (37) (v/v), with the flow velocity 0.6 mL/min. The ionization were achieved by using APCI source positive ion mode with MRM scan mode. The internal standard calibration curves were used for quantitative. The method of adding-recovery …
Measurement Uncertainty Of 3 Alkaloids In Soup Flavor Seasoning By Lc-Ms/Ms,
2017
Fujian Saifu Food Inspection Research Institute Co., Ltd., Fuzhou, Fujian 350011, China
Measurement Uncertainty Of 3 Alkaloids In Soup Flavor Seasoning By Lc-Ms/Ms, Ma Lixing, Lu Xu, Chen Richun
Food and Machinery
In order to properly improve the integrity and reliability of the results, the LC-MS/MS method was used to determine the discrepancy of the detection results of papaverine, narcotine, thebaine in soup flavor seasoning powder. This paper based on “DB 31/2010—2012 of local standards for food safety, the Determination of Papaverine, Morphine, Narcotine, Codeine and Thebaine in Hot Pot Food by Liquid Chromatography-Tandem Mass Spectrometry”, analyzed the residue results of papaverine, narcotine, thebaine in soup flavor seasoning powder and the sources of the uncertainty of measurement. It also synthesized the total uncertainty. The results showed that the synthesis of relative standard …
Regional Discrimination Of Three Kinds Of Tea By Isotope Ratio Analysis,
2017
Hunan Institute of Food Quality Supervision Inspection and Research, Changsha, Hunan 410111, China
Regional Discrimination Of Three Kinds Of Tea By Isotope Ratio Analysis, Zhang Jianhui, Wang Xiali, Hu Yonghui, Fang Xuanqi, Dai Xuan, Zhang Li, Liu Lansong
Food and Machinery
The isotope ratio of five kinds of heavy metal elements in tea samples from different areas was measured, and the variance, cluster and discriminant analyses were undertaken using SAS (statistical analysis system) software. The results showed that 206Pb/207Pb, 66Zn/67Zn, 68Zn/67Zn, 114Cd/110Cd, 112Cd/110Cd, 26Mg/25Mg 6 indexes existed significant differences in the three regions (99% significant level). The cluster analysis results of the six indexes showed that the clustering accuracy of samples form three regions as Guzhang (78.26%), Shimen (94.44%) and Anhua (92.10%). The …
Research On Lawsuit Relief Mechanism Of Food Damage Infringement,
2017
Shanxi DaTong University, Datong, Shanxi 037009, China
Research On Lawsuit Relief Mechanism Of Food Damage Infringement, Zhang Youlin
Food and Machinery
Compared with general tort, food damage infringement has such characteristics as victim scale, infringement subject diversification and serious damage. However, the current food tort litigation relief mechanism has not paid enough attention to these characteristics, resulting in a series of problems, such as the difficulty in providing evidence by victims, high litigation costs, and too loosetort liability. So it is necessity to establish a science public interestlawsuit system for food tort litigation, reverse the burden of proof in the food tort litigation, , and increase the food tort liability, so that to promote the smooth realization of the function of …
Legislative Defects And Perfection Offood Safety Crime For Food Operators,
2017
Harbin Engineering University, Harbin, Heilongjiang 150001, China
Legislative Defects And Perfection Offood Safety Crime For Food Operators, Han Jin, Yang Tongtong, Han Ying
Food and Machinery
Operators of food safety crime is the main target of the current field of food safety criminal legislation. From a legal perspective, the relevant provisions did not fully reflect the reality that food safety crime is becoming popular, and the harm to public safety is getting serious. Which has a series defects, such as narrowing the subjects, lighting sectencing, and too rigid fine punishment, etc. As the operators’ food safety crime has evolved into a endangering public safety crime, it is necessity to take measures, such as expansion of the food safety criminal regulation scope, more strict punishment, and adopt …
Study On Temperature And Humidity Control Ability Of Heating Type Heat Pump Drying System,
2017
Guangdong Institute of Modern Agricultural Equipment, Guangzhou, Guangdong 510630, China
Study On Temperature And Humidity Control Ability Of Heating Type Heat Pump Drying System, Wu Yaosen, Gong Li, Liu Qinghua, Liu Jun, Long Chengshu
Food and Machinery
In this paper, the heat and moisture balance of heating type heat pump drying system (HHPDS) is analyzed from the point of view of air conditioning. The ability that to effectively control the drying temperature and humidity is defined as the control capability. The relationship between the control capability and the drying temperature and humidity, the temperature and humidity of the environment and the amount of material is explained based on the principle of heat pump. Through the qualitative analysis of the influence of various factors, the conditions of determining the control ability of the HHPDS were obtained and it …
Design Of Semi-Automatic Pellet Racking Machine,
2017
Guilin University of Electronic Science and Technology, Guilin, Guangxi 451000, China
Design Of Semi-Automatic Pellet Racking Machine, Zhang Yaling, Zhu Wangchun, Cheng Hao
Food and Machinery
Aiming at overcoming the shortcomings of the existing material dispensing technology, a semi-automatic pellet racking machine was designed, which multiply controlled the entire packaging process by the controlling system. Combining the bilateral asymmetric oscillating structure with the conveyor belt powered by the stepper motor, the racking machine distributed the pellets apart by taking two steps. The infrared count structure and aggregate silo were used to make the pellets discharged in accordance with a certain number of packaging, while the total number of pellets and the number of times were recorded. The device was concise, ingenious and could ensure the accuracy …
Simulation Of Workspace And Path Design Of Industrial Robot With Six Joints,
2017
Anhui Wenda University of Information Engineering, Hefei, Anhui 231201, China
Simulation Of Workspace And Path Design Of Industrial Robot With Six Joints, Li Juchen, Zeng Yihui
Food and Machinery
Workspace of industrial robot with six joints is derived and simulated by MATLAB software. With the quintic interpolation calculation, the path of industrial robot with six joints is designed. The simulation analysis of the path of industrial robot with six joints is carried out by MATLAB software. The results show that the workspace of industrial robot with six joints can basically meet needs of work in food packaging process. Moreover, the movement of industrial robot with six joints is very smooth. And the curve of angle, velocity, acceleration of each joint is continuous. And the planned path of welding robot …
