Study On Moisture Adsorption Mechanism By Lf—Nmr And Esem,
2015
The State Key labtory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
Study On Moisture Adsorption Mechanism By Lf—Nmr And Esem, Han Dan, Tian Zhaofu, Wang Hongsheng, Zhang Xiaoming
Food and Machinery
Tobacco is hygroscopic products, and the moisture content has a significant impact on its quality. The relaxation time of different cigarette samples were measured by low-field NMR techniques to study the moisture adsorption mechanism and the microstructure difference between different tobacco samples which in different water content and were observed by ESEM. T21 values are the most sensitive indicators reflected the bonding strength of water. The dominated way of tobacco absorption is through the capillary sorption while after adding a polar group such as a hydroxyl the absorption mechanism steering chemisorptions. Spongy tissue and palisade tissue is an important organizational …
Performance Evaluation And Application Of Novel Two-Way Water-Blocking Additive In Tobacco,
2015
The State Key labtory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
Performance Evaluation And Application Of Novel Two-Way Water-Blocking Additive In Tobacco, Zhang Xuqian, Tian Zhaofu, Wang Hongsheng, Zhang Xiaoming
Food and Machinery
The water content of mainstream smoke components is closely associated with the sensory comfort of smoking, and it was also susceptible to the environment. In order to improve the stability of the water content in cigarette tobacco, the effective two-way water-blocking additive was developed of aliphatic hydrocarbons and compound sugars, the synergy of both additives made the water content of tobacco under a good control. The function of the additive was proved by testing in the simulation environment (RH=32% and RH=84%) in 35 ℃. Finally, proved that when added 1.0% aliphatic hydrocarbon (GY) and 0.1% polysaccharose (B), a good two-way …
Effect Of Ozone Treatment On Quality Of Steamed Breads,
2015
Department of Health and Safety, Shanghai Trade Union Polytechnic College, Shanghai 201415, China
Effect Of Ozone Treatment On Quality Of Steamed Breads, Li Bo, Gao Xin
Food and Machinery
The wheat was treated by ozone fumigation method at concentration of 5 mg/L for 0, 0.5, 1.0, 1.5 and 2.0 h, respectively. Then the wheat flour was used to make steamed bread. The ozone treatment effect on steamed bread quality was evaluated by the specific volume, texture profile analysis, and sensory evaluation. The aspect ratio increased with the increased ozone treatment time, however, the specific volume increased first and then decreased. For the texture profile analysis, 1.0 h ozone treatment could reduce the α-amylase activity and increase the gluten content, which increased the hardness and elasticity of the steamed bread. …
Purification And Identification Of Endogenous Allergy Protein Ara H 2 In Peanut,
2015
School of Life Science, Shanghai University, Shanghai 200444, China
Purification And Identification Of Endogenous Allergy Protein Ara H 2 In Peanut, Zhu Qingqing, Zhang Wenju, Cai Qin, Chen Qin
Food and Machinery
Ara h 2 is one of the major allergen in peanut. Raw peanut was subjected to a series of sequential treatments, such as protein extraction, DEAE-Sepharose Fast Flow anion-exchange chromatography and sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS—PAGE) recovery. The purified protein was identified by matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI—TOF/MS). The results showed that the highly purified protein could be obtained by this method and was identified as Ara h 2 by MALDI—TOF/MS. The molecular weights of two constituents were 18.5 kD (Ara h 2.01) and 20.1 kD (Ara h 2.02). Recovery rate of column chromatography …
Effect Of Stabilized Rice Bran Addition On Retrogradation Kinetics Of Restructured Rice,
2015
College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
Effect Of Stabilized Rice Bran Addition On Retrogradation Kinetics Of Restructured Rice, Wang Peng, Yang Liu, Xiao Zhigang, Xie Tiemin, Li Zhe, Xie Bing
Food and Machinery
The retrogradation and crystallization characteristics of restructured rice were studied by DSC and XRD, and the effect of stabilized rice bran on Avrami equation and retrogradation behavior of restructured rice were analyzed. The results indicated that stabilized rice bran has a significant inhibition on retrogradation of restructured rice. The rate constant k of restructured rice with stabilized rice bran was the lowest in the test samples, and the development of crystal showed instantaneous nucleation; the V-type diffraction pattern and less B-type diffraction pattern were found in the restructured rice with stabilized rice bran after 7 days storage, which indicated that …
Study On Enzymolysis Of Pleurotus Nebrodensis Cooking Juices Based On Principal Component Analysis,
2015
Institute for Farm Products and Nuclear-Agricultural Technology, HAAS, Wuhan, Hubei 430064, China
Study On Enzymolysis Of Pleurotus Nebrodensis Cooking Juices Based On Principal Component Analysis, Wang Xiaoli, Xue Shujing, Zhou Ming, Li Lu, Cheng Wei, Guan Jian, Yang De
Food and Machinery
The effect of six enzymes was studied, as edible fungus hydrolase A01, Edible fungus hydrolase A02, cellulose, neutral protease, papain and flavourzyme on the content of free amino acid, resolvable sugar and L*, a*, b* value in Pleurotus nebrodensis cooking juices. The results indicated that the influence on the content of free amino acid and resolvable sugar was the most significant. The amount of free amino acid was increased by 55.0% after the neutral protease treatment; and the amount of resolvable sugar increased by 41.28% after cellulase treatment. The L* value both increased apparent …
Study On Quantum Dot Immune Chromatography Test Strip For Escherichia Coli O157:H7,
2015
Institute of Product Quality Supervision and Inspection of Hunan Province, Changsha, Hunan 410007, China
Study On Quantum Dot Immune Chromatography Test Strip For Escherichia Coli O157:H7, Yuan Liejiang, Li Mengli, Wang Shuyuan, Yang Mengxin, Li Zhonghai
Food and Machinery
To develop a quantum dotsb(QDs) immune chromatographic strip test for rapid and sensitive detection of Escherichia coli O157:H7. Water soluble QDs was electrostatic coupled with mouse anti- Escherichia coli O157:H7 monoclonal antibody and mouse anti- Escherichia coli O157:H7 and rabbit anti-mouse IgG were marking on the NC membrane as test line and control line, respectively. The rapid detection of immune chromatographic strip test paper was based on double antibody sandwich. With the immune chromatographic strip test, only 5 min was needed for detection. The limit of detection was 1×104 CFU/mL. No cross-reactivity was found with 8 kinds of common …
The Feasibility Of Rapid Determination Of The Cadmium Content In Rice Based On Near Infrared Spectroscopy And Synergy Interval Partial Least Squares,
2015
Longping Branch, Graduated School of Central South University, Changsha, Hunan 410125, China;Hunan Food Test and Analysis Centre, Changsha, Hunan 410125, China
The Feasibility Of Rapid Determination Of The Cadmium Content In Rice Based On Near Infrared Spectroscopy And Synergy Interval Partial Least Squares, Zhu Xiangrong, Li Gaoyang, Su Donglin, Liu Wei, Shan Yang
Food and Machinery
Near infrared spectroscopy (NIRS) combined with synergy interval partial least squares (siPLS) were used to establish the rapid method for the determination of cadmium content in rice. The NIR spectra of 72 rice samples were collected and analyzed. After optimization, an approach (SG smoothing combined with MSC and mean-centering) was adopted as a pre-treatment method for raw spectrum. SiPLS method was used as extraction methods of characteristic variables, and the NIRS quantitative model was built and predicted. The RMSECV and RMSEP of the siPLS model were 0.247 and 0.261, respectively. The Rc and Rp were 0.919 and 0.895, respectively. The …
Risk Assessment On Exposure Of Lead And Cadmium Of Rice In Guangdong Residents From 2012 To 2014,
2015
Reference Laboratory of Heavy Metals of National Food Safety Risk Monitoring, Centre for Disease Control and Prevention of Guangdong Province, Guangzhou,Guangdong 511430, China
Risk Assessment On Exposure Of Lead And Cadmium Of Rice In Guangdong Residents From 2012 To 2014, Cai Wenhua, Hu Shuguang, Xu Xiumin
Food and Machinery
According to monitoring data of rice of Guangdong from 2012 to 2014, assessment on exposure of lead, cadmium in Guangdong residents was made by the method of China Total Diet Study. The contents of lead, cadmium in the rice of Guangdong were measured through the food safety risk monitoring from 2012 to 2014. The margin of exposure (MOE) of lead, estimated monthly intake (EMI) of cadmium were worked out as evaluation criteria. The over limit rate of lead, cadmiumin in Guangdong Province rice were 0.11%, 622% respectively. In addition to parts of cadmium in rice exceed the standard rate is …
Simultaneous Determination Of 16 Kinds Of Phthalate Esters In White Spirit By Gas Chromatography-Mass Spectrometry With Internal Standard,
2015
Guangzhou Institute for Food Control, Guangzhou, Guangdong 510440, China
Simultaneous Determination Of 16 Kinds Of Phthalate Esters In White Spirit By Gas Chromatography-Mass Spectrometry With Internal Standard, Liu Miaofen, Liu Jia, Qiu Peili
Food and Machinery
Introduced a way to measure 16 kinds of phthalate esters from wine by using internal standard on GC—MS. Diethyl terephthalate as the internal standards were added in wine, after reduced the alcohol concentration by adding distilled water. The hexane extraction efficiency of 16 kinds of PAEs was improved significantly. The results revealed that the quantitative detection of the linear was in a range of 0.25～6.00 mg/L, which the correlation coefficient was more than 0.997. Through the measurement of real samples, the method recovery was in 31.2%～109.0%, and the RSD was lower than 10%. To summarize, this approach was easy to …
Determination Of Α-Solanine And Α-Chaconine In Potato By Hplc—Elsd,
2015
College of Horticulture and Landscape, Hunan Agricultural University, Changsha, Hunan 410128, China
Determination Of Α-Solanine And Α-Chaconine In Potato By Hplc—Elsd, Shang Tingting, Kuang Mengting, Hu Xingxi, Xiong Xingyao, Lu Ying
Food and Machinery
A method of reversed-phase high performance liquid chromatography (HPLC) coupled with evaporative light scattering detection (ELSD) was developed for the determination of α-solanine and α-chaconine in potato，and determine the contents in different samples. The results showed α- solanine and α- chaconine can be obtained good separation and high efficiency peaks when took 0.1% trifluoroacetic acid water and acetonitrile as mobile phase with gradient elution, and the drift tube of ELSD detector was 98 ℃, the pressure of nebulizing gas was 6.90 kPa. α-solanine and α-chaconine could be extracted with 100 times the mass 1% formic acid in methanol at 70 …
Effect Of Processing Technology On Composition And Concentration Of Pahs In Camellia Seed Oil,
2015
Quzhou Center of Quality Supervision and Technology Testing, Quzhou, Zhejiang 324000, China
Effect Of Processing Technology On Composition And Concentration Of Pahs In Camellia Seed Oil, Zhu Huaming, Dai Xianjun, Zheng Ruihang
Food and Machinery
The camellia seed oil is a kind of Chinese endemic woody oil, which had the higher nutrition value and better healthy function for the body. The Polycyclic aromatic hydrocarbons (PAHs）could be produced with the oil processing progress and affected the safety of camellia seed oil. In the experiment, the 15 ingredients of PAHs were examined in camellia seed crude oil respectively produced through five processing technologies including the low temperature squeezing, high temperature squeezing, leaching, CO2 supercritical fluid extraction and aqueous enzymatic extraction methods. The oil samples including no PAHs (concentrations<0.1 μg/kg) were respectively treated under different higher temperatures for 50 min. The concentrations of 15 PAHs ingredients were little in camellia seed oil respectively produced through the low temperature squeezing, CO2 supercritical fluid extraction and aqueous enzymatic extraction methods, and partially exceeded Chinese or international oil safety standard for the oil from high temperature squeezing and leaching methods. With the increase in processing temperature, the partial PAHs ingredients would be detected and its concentrations showed an upward trend in the treated oil. The above results indicated there was a correlation between the partial PAHs ingredients, concentrations and processing technology, and high temperature could be the main reason leading to the production of PAHs in the camellia seed oil.
Application Of New Type Of Antiseptic Natamycin In Liquid Feed,
2015
College of Life Science, Guangzhou University, Guangzhou, Guangdong 510006, China
Application Of New Type Of Antiseptic Natamycin In Liquid Feed, Lei Dezhu, Huang Yongjian
Food and Machinery
Inhibition effects were investigated for new type of antiseptic natamycin and the combination of natamycin and sodium diacetate on common mildews, including Aspergillus niger, Rhizopus niveus, Mucor corticolus, Penicillium glaucum. The results indicated that the minimal inhibition concentration of natamycin was 3～6 mg/L, while the optimized inhibition ratio was 4 mg/L to 3 g/L in the combination. Destructive storage test was also conducted at 10, 20 and 30 mg/L respectively in this paper, and little difference were observed according to the result by plate counting. 100% inhibition effect of natamycin at 10 mg/L could be expected to last for 18 …
Detection Of Tobacco Mildew Based On Electronic Nose Technology,
2015
School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
Detection Of Tobacco Mildew Based On Electronic Nose Technology, Huang Xingyi, Chen Wei
Food and Machinery
Mildew is one of the important factors affecting the quality of pipe tobacco. A detection method was developed for identification of moldy pipe tobacco based on electronic nose. Five SnO2 semiconductor gas sensors were selected to construct a sensor array of the electronic nose. Back propagation neural network (BPNN) was employed as the pattern recognition method. Two feature parameters were extracted from response curves of each sensor, and principal component analysis (PCA) and BPNN were used to process feature data of the whole sensor array. The results of PCA showed the obvious separability of moldy and normal pipe tobacco, …
Adulteration Detection Of Honey Based On Electronic Tongue,
2015
Department of Food Science, Sichuan Tourism University, Chengdu, Sichuan 610100, China
Adulteration Detection Of Honey Based On Electronic Tongue, Jia Hongfeng, Li Wei, Duan Lili, He Lian, Deng Hong
Food and Machinery
An electronic tongue was used to analyze unadulterated and adulterated honey samples. The response signals were analyzed by principal component analysis (PCA), discriminant factor analysis (DFA) and partial least-squares analysis (PLS). The results indicated that electronic tongue could recognize unadulterated and adulterated honey samples (the adulterated ratio of high fructose syrup was above 5%). Coefficient of determination between sensors response signals and the ratio of high fructose syrup of PLS model was 0.992 0. The prediction error of PLS model was within 5% (the adulterated ratio of high fructose syrup was between 10% to 70%). It was proved that electronic …
Research On Rapid Identification Methods Of Edible Starch,
2015
Hunan Institute of Food Quality Supervision Inspection and Research, Changsha, Hunan 410000, China
Research On Rapid Identification Methods Of Edible Starch, Tang Xiaolan, He Yan, Huang Yan
Food and Machinery
Using ordinary optical microscope technology, by comparing the granule shape and size of kudzu root starch, fern root starch, lotus root starch, lily starch, cassava starch, corn starch, sweet potato starch, potato starch, to identify the source and types of starch, solved the difficult problem of starch adulteration. This method is simple, less equipment investment, easy maintenance, low cost, batch testing, especially suitable for rapid supervision, inspection and a lot of starch samples for detection in business, facilitating the popularization.
Investigation, Analysis And Countermeasures On Disease Resistance Of The Grape In Lixian Country Vineyards,
2015
National Engineering Laboratory for Rice and By-product Deep Processing, Changsha, Hunan 410004, China;Center South University of Forestry & Technology, Changsha, Hunan 410004, China
Investigation, Analysis And Countermeasures On Disease Resistance Of The Grape In Lixian Country Vineyards, Ye Chun, Zhou Wenhua, Tang Nai, Zhang Qun
Food and Machinery
In order to better carry out the prophylaxis and treatment work of grape diseases, and reduce economic losses caused by diseases, the diseases survey in Lixian County vineyards in the northwest of Hunan was put up by the system observation and general survey method, and relevant books searching, experts consultation. The results were as follows: The grape had 13 kinds of diseases in Liyang Plain. The main diseases were downy mildew, gray mold, fruit cracking, penicillium and soft rot. The diseases reached the peak in July and August. Differences lies in disease resistance of different grape varieties, and the strong …
Development Of Aging Measuring Device For Flour Food,
2015
College of Food Engineering, Jilin Business and Technology College, Changchun, Jilin 130062, China; Jilin Province Key Laboratory of Grain and Oil processing, Jilin Business and Technology College, Changchun, Jilin 130062, China
Development Of Aging Measuring Device For Flour Food, Leng Jinsong, Zhu Zhu
Food and Machinery
Determination of the aging degree on flour food, used to measure by TA-XT2i texture analyzer, Differential Scanning Calorimetry(DSC), X-ray, Raman spectroscopy, Nuclear magnetic resonance spectroscopy, and α-amylase methods. But the these methods need expensive equipment, a lot of inspection instruments and reagents, well practicing operator, high maintenance costs. A flour food aging degree measuring device, the instrument adopts the electric motor control, can automatically measure and record from the field measurement data, overcomes the disadvantages of the above methods, manual and mechanical device operation in one, just simple training can operation, less subsidiary consumables can meet the laboratory use, and …
Section Shape Deviation Analysis Of Fruits And Vegetables Three-Dimensional Dicing Machine,
2015
Key Laboratory of Ministry of Education for Agricultural Equipment and Technology, Jiangsu University, Zhenjiang, Jiangsu 212013, China
Section Shape Deviation Analysis Of Fruits And Vegetables Three-Dimensional Dicing Machine, Hu Jianping, Yang Lihong, Yang Deyong, Huang Yingsa
Food and Machinery
Three-dimensional dicing machine has some advantages of high efficiency, compact structure and not easy to be clogged. However, there is always uneven phenomenon on the diced section, especially when cutting big side block. In order to improve the quality of dice, analyzed the mechanism of three-dimensional dicing, established the curve equation of inclined section of fruits and vegetables block, analyzed the main affecting factors of the quality of diced section and divided diced sections into three shapes of right deviation, left deviation and symmetrical. Using relative deviation and gradient of the section as evaluation index to analyze the effects of …
Design And Test Of Gear Pump Transmission Of Tomato Harvester,
2015
Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
Design And Test Of Gear Pump Transmission Of Tomato Harvester, Hao Zhaohui, Yang Xuejun, Zhou Junping, Zhang Zhishan
Food and Machinery
In order to solve the unreliable problem of the v-belt drive of the gear pump in tomato harvester，the transmission device of circular arc tooth synchronous belt of tomato harvester gear pump was designed. The selection and design calculation of synchronous belt pulley, the analysis and design of the tension device and calculation of tension was carried out. The no load test of the whole machine shows that: the arc tooth belt transmission of tomato harvester gear pump worked smoothly and reliably, the belt vibration was relatively small, the belt temperature was normal, the oil cylinder, motor and brake ran well, …
