Fast Examination Of Total Colony Numbers In Electronic Cigarette Liquids Based On Adenosine Triphosphate (Atp) Bioluminescence Method,
2018
China Tobacco Henan Industrial Co., Ltd., Zhengzhou, Henan 450001, China
Fast Examination Of Total Colony Numbers In Electronic Cigarette Liquids Based On Adenosine Triphosphate (Atp) Bioluminescence Method, Zhang Tingting, Feng Yingjie, Yang Zongcan, Liu Xiangzhen, Hao Hui, Zhang Dongyu, Zhu Qi, Zhang Zhan
Food and Machinery
In order to fast evaluate the hygiene situation of electronic cigarette liquids, the fast examination of total colony numbers in electronic cigarette liquids has been achieved which was based on the adenosine triphosphate (ATP) bioluminescence method.The method has been optimized, and the examination results of total colony by ATP method was compared with the results by National standard microbial detection method . Results showed: (1) the optimal temperature for ATP examination was 25 ℃, optimal time for bioluminescence reaction was 30 s, the detection limit of ATP was 2.36 × 10-12 mol/L, RSD was 3.5%～8.2%, and the sample recovery …
Optimization Of Polysaccharide Extraction Process From Morinda Officinalis How And Its Biological Activity In Vitro And In Vivo,
2018
Department of Public Infrastructure，Zhaoqing Medical College， Zhaoqing, Guangdong, 526020, China
Optimization Of Polysaccharide Extraction Process From Morinda Officinalis How And Its Biological Activity In Vitro And In Vivo, Liang Xiaojun, Wei Bingdun, Chen Qian, Ma Jinkui, Li Ke, Huang Xiaochen
Food and Machinery
Morinda officinalis polysaccharide is an important bioactive substance, in terms of its anti-depression, immune enhancement, anti-viral and anti-tumor effects, and polysaccharide holds great potential in function food and drug development. In this study, the Box-Behnken design principle and one-factor-at-a-time experiments were employed to optimize the extraction parameters of polysaccharide from Morinda officinalis How in Deqing area, Guangdong province. The in vitro antioxidant activities of extracted polysaccharides were also investigated. The results showed that the optimal extraction conditions were as follows: extraction time was 2 h, extraction times was 3, and solid-liquid ratio was 1∶11 （g/mL）. Under the control of these …
Optimization Of Fermentation Process For Exopolysaccharides Production Of Weissella Cibaria Sj-02,
2018
College of Food Science, Sichuan Agricultural University, Yaan, Sichuan 625014, China
Optimization Of Fermentation Process For Exopolysaccharides Production Of Weissella Cibaria Sj-02, Chen Yuan, Jia Sisi, Hu Lu, Wang Boyang, Liu Shuliang
Food and Machinery
Response surface methodology was used to optimize the components of fermentation medium and the fermentation conditions affecting the exopolysaccharides (EPS) production of Weisssella cinerea SJ-02. Taking EPS production as an index, the effects of carbon sources and nitrogen sources in the medium on the yield of exopolysaccharides were explored. The results showed that using MRS as basal medium, keeping its 2% glucose and replacing peptone with 1.5% soy peptone increased the EPS production of strain SJ-02. The Box-Behnken central combination design was used to study the effects of exopolysaccharides production. The optimal fermentation conditions were as follows: inoculation amount 3.00%, …
Screening And Identification Of Dominant Strains Of Fermented Characteristic Lobster Sauce In Guizhou Sansui,
2018
Guizhou Province Key Laboratory of Fermentation Engineering and Biopharmacy, Guizhou University, Guiyang, Guizhou 550025, China; College of Liquor Making and Food Engineering, Guizhou University, Guiyang, Guizhou 550025, China
Screening And Identification Of Dominant Strains Of Fermented Characteristic Lobster Sauce In Guizhou Sansui, Zhang Qin, Wang Xiujun, Shang Jingtian, Gao Xiaohong
Food and Machinery
In order to realize the stable quality and large-scale production of Guizhou Sansui characteristic bacteriallobster sauce.Pure cultivar and mixed bacillus fermentation was carried out to strengthen the dominantstrainsbased on the preservation of the original flavors. Thirteen strains were isolated and screened from traditional production techniques and inoculated into soybeans. Preliminary screen and rescreen by using sensory evaluation and determination of protease activity as indicators,five strains of dominant strains were selected for physiological and biochemical experiments. Finally, three strains of B, F and J were selected for 16Sr DNA sequencing ，and establishingphylogenetic trees. The results showed that strains of B, F …
Screening Of Sudan Dyes Adulteration In Grape Juice Based On Hptlc-Sers Detection,
2018
State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
Screening Of Sudan Dyes Adulteration In Grape Juice Based On Hptlc-Sers Detection, Wang Liao, Ye Zhiyang, Wang Tiannan, Xu Xueming, Chen Yisheng, Yang Na, Wu Fengfeng, Jin Yamei
Food and Machinery
This paper presented a fast screening method for determining Sudan dye adulteration in grape juice, based on the combination of High Performance Thin-Layer Chromatography (HPTLC) and Surface Enhanced Raman Spectroscopy (SERS). Chromatography separation was achieved on silica gel plates using petroleum/acetone/acetic acid (9/1/0.1) as the mobile phase. After that, key factors including silver nano particle concentrations, electrolyte types/concentrations and incident laser wavelength was investigated with regarding to their effects on the quality of SERS results. Under optimized conditions, the method sensitivity reached to 0.01～0.05 mg/kg, while remarkable linearity (R2＞0.996) was obtained within the range of 1～20 mg/kg. Apart …
Antibacterial Activity Of NΑ-Lauroyl-L-Arginate Ethylester Against Five Pathogenic Microorganisms Of Fruits And Vegetables,
2018
College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
Antibacterial Activity Of NΑ-Lauroyl-L-Arginate Ethylester Against Five Pathogenic Microorganisms Of Fruits And Vegetables, Li Yang, Xu Xiaohui, Li Yang, Feng Fengqin
Food and Machinery
Antibacterial activity of Nα-lauroyl-L-arginate ethylester(LAE) against five pathogenic microorganisms of fruits and vegetables were investigated in this study. Bacteriostatic test in vitro was taken to research the antibacterial activity of LAE. Penicillium digitatum, Penicillium italicum, Botrytis cinerea, Alternaria alternate and Pectobacterium carotovorum subsp. Carotovorum were treated as the model bacteria of pathogenic microorganisms of fruits and vegetables, and the minimum inhibitory concentration(MIC) of LAE against these model bacteria were determined. The inhibition of LAE to the hypha growth for moulds and the bactericidal effect of LAE for bacteria were also determined. Then the combined antibacterial effects of LAE …
A Retrospective Assessment Of Us Pork Productions: 1960 To 2015,
2018
University of Arkansas, Fayetteville
A Retrospective Assessment Of Us Pork Productions: 1960 To 2015, Ben Putman, Jacob Hickman, Prathamesh Bandekar, Marty Matlock, Greg Thoma
Food Systems
The primary goal of this study is to assess the carbon, energy, water and land footprints per kg (2.2 pounds) of live weight (LW) pork produced at five-year increments between 1960 and 2015. This assessment utilizes the Life Cycle Assessment (LCA) methodology, which is a technique to assess the potential environmental impacts associated with a product system by compiling an inventory of relevant energy and material flows, evaluating the associated burdens, and interpreting the results to assist in making more informed decisions and to provide an understanding of the drivers of change over the past 55 years. This LCA is …
Synthesis And Characterization Of Polyaniline Agglomerates And Polyaniline Nanoparticles To Use As Printed Sensors To Detect Spoilage Of Catfish During Refrigerated Storage,
2018
Louisiana State University and Agricultural and Mechanical College
Synthesis And Characterization Of Polyaniline Agglomerates And Polyaniline Nanoparticles To Use As Printed Sensors To Detect Spoilage Of Catfish During Refrigerated Storage, Vashti Martae Campbell
LSU Master's Theses
There is growing interest in the development of sensors contained in packaging for seafood that are applicable at the consumer level to monitor freshness in a non-destructive manner. Total volatile basic nitrogen (TVB-N) analysis indicates the freshness of seafood. TVB-N analysis is sensitive to the spoilage compounds comprised of ammonia, trimethylamine, dimethylamine, and biogenic amines commonly found in seafood and whose concentration increases when spoilage microbial growth occurs. However, TVB-N analysis is laborious and is not suitable for use at the consumer level. Polyaniline (PANI) is a polymer that may be used as a sensor for detecting TVB-N in seafood. …
Structural Characteristics Of Millet Glutenin And Gliadin,
2018
National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, Jiangsu 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
Structural Characteristics Of Millet Glutenin And Gliadin, Ji Zhongwei, Dai Tiantian, Mao Jian
Food and Machinery
Millet glutenin and gliadin was obtained by alkali extraction and acid precipitation and millet gliadin was distracted by ethanol. Then their structural characteristics were analyzed. SDS-PAGE electrophoresis results showed that the molecular weight of the millet gliadin was small, while millet glutenin was distributed from high molecular weight to low molecular weight. Furthermore, the XRD analysis showed that both the two kinds of proteins were amorphous structures. The secondary structure was measured by circular dichroism. Millet gliadin belonged to all alpha structure, and its order was better than that of millet alkali soluble protein. Moreover, by atomic force microscopy analysis, …
Effect Of Intermolecular Interaction On Gel Formation Of Preserved Egg Yolk,
2018
College of Food Science and Technology, South China Agricultural University, Guangzhou, Guangdong 510642, China; Livestock and Poultry Product Precision Processing and Safety Research Center, Guangzhou, Guangdong 510642, China
Effect Of Intermolecular Interaction On Gel Formation Of Preserved Egg Yolk, Ai Minmin, Tan Gting, Jiang Aimin, Yang Yijia, You Yuting
Food and Machinery
The preserved eggs were processed by immersion method. The effect of internal interactions on the formation of egg yolk gel during salting and ageing were determined by fluorescence spectrophotometer and FTIR et al. The sum of α-helical and β-turn of the secondary structure of the exterior egg yolk protein decreased by 54.71% under strong alkaline environment, with the surface hydrophobicity decreased significantly (P＜0.05), and the dramatic increase of ion bonds and disulfide bonds promoted the egg yolk proteins to form a gel. The sum of α-helical and β-turn of the secondary structure of the interior egg yolk protein increased by …
Isolation,Identification,Multilocus Sequence Typing Analysis And Antimicrobial Resistance Of Campylobacter Jejuni Isolated From Commercial Chicken In Northeast China,
2018
College of Food and Biological Engineering, Henan University of Science and Technology, Luoyang, Henan 471023, China
Isolation,Identification,Multilocus Sequence Typing Analysis And Antimicrobial Resistance Of Campylobacter Jejuni Isolated From Commercial Chicken In Northeast China, Fei Peng, Zhao Shengjuan, Jiang Yichao, Jiang Yan, Liu Lili, Xiao Feng, Zhang Huiyun, Tang Haoguo, Kang Huaibin
Food and Machinery
In order to reveal the contamination, population characteristics and antimicrobial resistance of Campylobacter jejuni isolated from commercial chicken in Northeast China, 1 000 chicken samples were collected from the Northeast China. C. jejuni was isolated and identified.The genetic diversity of C. jejuni was analyzed by multilocus sequence typing (MLST). The antimicrobial resistance of C. jejuni to 8 antibiotics was detected by K-B AGAR diffusion method. The results indicated that 62 C. jejuni strains were isolated from 1 000 chicken samples with a contamination rate of 6.2%, and were divided into 14 sequence types (STs). Among them, ST1 and ST5 were …
Simultaneous Determination Of Three Prohibited Substances In Fragrance Compound Through Gas Chromatography-Mass Spectrometry,
2018
Infinitus﹝China﹞ Company Ltd., Guangzhou, Guangdong 510665, China
Simultaneous Determination Of Three Prohibited Substances In Fragrance Compound Through Gas Chromatography-Mass Spectrometry, Lu Zhi
Food and Machinery
In this study, a gas chromatography-mass spectrometry (GC/MS) method was established for the determination of geranyl nitrile, 2-pentyl-2-cyclopenten-1-one and phenyl cyanide in fragrance compound, and the method was also validated. The method had good linearity (>0.990 0) with the concentration from 0.000 5 mg/mL to 0.100 0 mg/mL and low limits of detection (LOD) (<0.005 μg/mL) for these three target compounds. And the recovery was from 90% to 116% with relative standard deviation (RSD) from 4.2% to 5.4% at quality control concentration. In a word, the method met the need of trace detection, which can be used to test geranyl nitrile, 2-pentyl-2-cyclopenten-1-one and phenyl cyanide in fragrance compound. When the GC-MS method was applied to detect these three components in different pepppermint fragrance samples, none of them was detected out.
Study On Microwave Drying Based On Temperature And Power Control,
2018
Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology, Wuxi, Jiangsu 214122, China; School of Mechanical Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
Study On Microwave Drying Based On Temperature And Power Control, Luo Guiyi, Song Chunfang, Li Zhenfeng, Xu Wanxiu
Food and Machinery
Based on a microwave drying system，automatically and continuously regulating microwave power and temperature control, a drying model composed of three different temperature and power controls was used to investigate the potato chips. After analyzing the drying quality and energy consumption of the three drying models, a good microwave drying process for potato chips was found. The research showed that the microwave drying without temperature control was easy to overheat in the last drying stage and made the product burnt. However, the optimal temperature control effect and product quality could be obtained by combining the variable microwave power with the feedback …
The Research And Application Of Polynomial Fitting In Cam Curve Design Of Cap Screwing Machine,
2018
Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology, Wuxi, Jiangsu 214122, China
The Research And Application Of Polynomial Fitting In Cam Curve Design Of Cap Screwing Machine, Wu Jia, He Xueming, He Kai, Zhang Rong
Food and Machinery
In view of the excessive local control conditions, the power of the cam curve designed by traditional polynomial interpolation method got too high to control, which was not conducive to the processing of capping machine cam. The global 5, 6 and 7 polynomial fitting methods were separately used to design the cam curve, so that it could control the power of the polynomial while satisfying the local control conditions. When the parameters of the cam curve got optimized, constructed the cam mechanism into a three-dimensional model and carried out the dynamic simulation analysis. After comparing to the kinematic and dynamic …
Analysis Of Pressure Fluctuation Characteristics Of The Flow Field In The Cycloid Rotor Oil Pump,
2018
Hunan Province Key Laboratory of Safety Design and Reliability Technology for Engineering Vehicle, Changsha University of Science and Technology, Changsha, Hunan 410114, China
Analysis Of Pressure Fluctuation Characteristics Of The Flow Field In The Cycloid Rotor Oil Pump, Wang Wen, Li Wenke, He Shanghong, Liu Guangming
Food and Machinery
In order to investigate the characteristics of pressure fluctuation in cycloid rotor oil pump, based on RNG k-ε turbulence model and moving mesh, the transient flows for different operating conditions in cycloid rotor pump were investigated numerically and the computational results of flow and efficiency were obtained. The pressure fluctuation at different monitoring points were measured and analyzed in time and frequency domains. The results show that the pressure fluctuation of the flow field in the cycloid rotor oil pump is periodical obviously, the amplitude of pressure fluctuation is smaller in the oil inlet chamber and decreases gradually along the …
Application Of Regional Cultural Symbol Translation In Design Of Nianli Food Package In Western Guangdong,
2018
Guangdong Normal University, Guangzhou, Guangdong 510600, China
Application Of Regional Cultural Symbol Translation In Design Of Nianli Food Package In Western Guangdong, Yan Li, Jiang Leige
Food and Machinery
Yuexi Nianli food packages have demands of blessing culture, the diet culture and regional culture, through analyzing the history and culture, the specific form and the humanities spirit in local cultural, refined the culture symbol elements in west of Guangdong. With the help of regional cultural symbol of translation technique, took the concept of Yuexi Nianli’s packaging design system: expressing of advancing with The Times’ spirit of “simple modelling＋ingenious structure＋AR technology applications”; conveying of the low-key and pragmatic attitude of “local materials＋green processing technology”; transmitting of the hope of “auspicious patterns and lucky colors”, aimed to promote the inheritance and …
Effects Of Different Packaging Methods On Beef Quality During The Postmortem Aging,
2018
School of Food Science, Nanjing Xiaozhuang University, Nanjing, Jiangsu 211171, China
Effects Of Different Packaging Methods On Beef Quality During The Postmortem Aging, Fu Qingquan, Zhang Wangang, Wang Haiou, Song Shangxin, Chen Shoujiang
Food and Machinery
Effects of air packaging and modified atmosphere packaging on the quality of fresh beef during postmortem aging was studied using vacuum packaging as control treatment. Six left side of longissimus dorsi muscles of yellow cattle were precooled at 4 ℃ for 24 h. After 24 h postmortem, beef samples (2.54 cm thick) were trimmed and mixed, and randomly divided into three groups. The beef samples were stored for 4 d, 7 d and 10 d in dark refrigeration house at 4 ℃ to mimic commercial storage conditions. At the end of each point, the meat color, tenderness, purge loss, centrifuge …
The Purification Of Lignin From Linseed Meal And Its Protective Effect On Oxidative Plasmid Dna Damage,
2018
College of Science, Sichuan Agricultural Uniersity, Yaan, Sichuan 625014, China
The Purification Of Lignin From Linseed Meal And Its Protective Effect On Oxidative Plasmid Dna Damage, Zhang Yongchao, Zhang Li, Zhang Yunsong, Jiang Yuanyuan, Wu Yichao
Food and Machinery
Extracted lignan from flaxseed meal by reflux method. The crude extract was preliminary purified by D101 macroporous adsorption resins which was followed by semi-preparation HPLC separation. The semi-preparative HPLC conditions were as follows: column was Megres C18(30 mm×250 mm，10 μm), mobile phase was a mixture of acetonitrile(A)-0.1% phosphoric acid water solution(B), gradient elution,flow rate was 35 mL/min, wavelength was 280 nm, column temperature was 30 ℃ and injection volume was 2 mL. In the conditions, 98% purity flax lignans were obtained. Investigated the protecting activity of lignan against DNA damage that caused by UV photolysis and H2 …
The Effects Of Maca On Energy Metabolism In Sd Female Rats,
2018
Affiliated High School of Yunnan Agricultural University, Kunming, Yunnan 650200, China;College of Bioengineering, Chongqing University, Chongqing 400044, China
The Effects Of Maca On Energy Metabolism In Sd Female Rats, Zhu Yuzhu, Zhu Ping
Food and Machinery
Investigated the effect of different color Maca on energy metabolism of rats. 40 SD female rats were randomly assigned to 5 groups according to their body mass, which includes one control group and four experimental groups. Respectively, the four experimental groups were gavaged with 1% carboxymethylcellulose sodium suspension with 0.42 g/kg·BW black Maca, purple Maca, yellow Maca and white Maca powder daily; the control group was gavaged with 1% carboxymethylcellulose sodium solution without Maca powder daily. For 28 days, determinated content of blood glucose, glycogen, insulin and insulin-like growth factor 1 in serum, amino acid content in serum and liver. …
Optimization On Extraction Technology And Analysis Of Subunit Component Of Bamboo Bean Albumin,
2018
School of Biotechnology and Food Engineering, Changshu Institute of Technology, Changshu, Jiangsu 215500, China; School of Food Science and Engineering, Jilin Agriculture University, Changchun, Jilin 130118, China
Optimization On Extraction Technology And Analysis Of Subunit Component Of Bamboo Bean Albumin, Yao Haixia, Wang Juan, Wang Limei, Qi Bin
Food and Machinery
The osbrone classification method was used to extract bamboo bean albumin, the response surface method was designed to optimize the extraction technology, and its subunit component was analyzed. Design-Expert 8.05b software was used to establish mathematical models for the extraction process of bamboo bean albumin. The best extraction technology was obtained: stirring rate: 356 r/min, extraction temperature: 44 ℃, extraction time: 1.5 h, ratio of material to liquid: 111.20 (g/mL). Under this condition, the extraction rate is 27.56% (n=3), which had no obvious difference with the predicted value of 27.25%. In this case, the purity of bamboo bean albumin was …
