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Articles 2791 - 2820 of 5725

Full-Text Articles in Food Science

Research Progress Of Trans-Critical Co2 Refrigeration Cycle System And Application, Xuan Fuchen, Xie Jing Aug 2019

Research Progress Of Trans-Critical Co2 Refrigeration Cycle System And Application, Xuan Fuchen, Xie Jing

Food and Machinery

In this review, the research progress of compressor, evaporator and air cooler in trans-critical CO2 refrigeration system was analyzed. It was concluded that the method of improving the refrigeration efficiency and the optimum heat transfer efficiency of the trans-critical CO2 refrigeration system was obtained. The application of trans-critical CO2 refrigeration cycle in CO2 automotive air conditioning, heat pump and food processing were also discussed. The problems of high system pressure in CO2 refrigeration cycle in heat pump were analyzed. Finally, it was proposed that the development of oil-free compressor in trans-critical CO2 refrigeration cycle …

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Research Progress Of Cold Storage Type Incubator, Wang Xuesong, Xie Jing Aug 2019

Research Progress Of Cold Storage Type Incubator, Wang Xuesong, Xie Jing

Food and Machinery

With the development of phase change coolants and insulation technologies, it is expected that the cold storage incubators will be more economical, environmentally friendly, and durable, and have a positive impact on cold chain logistics and people's lives. Firstly, three types of organic, inorganic, and composite phase-change coolants used in cold storage incubators, as well as new cold storage agents such as microcapsule cold storage agents and nano-coolant developed in recent years were reviewed. Then, from thermal insulation materials and temperature fields, in terms of uniformity, the progress of design optimization of cold storage incubator were expounded, and the feasibility …

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Preparation And Identification Of The Monoclonal Antibody Of Kunitz Trypsin Inhibitor From Soybean, Wang Yao, Li Yanhong, Cao Jinbo, Sun Yaning, Xing Yunrui, Chen Xiujin, Deng Ruiguang, Hu Xiaofei Aug 2019

Preparation And Identification Of The Monoclonal Antibody Of Kunitz Trypsin Inhibitor From Soybean, Wang Yao, Li Yanhong, Cao Jinbo, Sun Yaning, Xing Yunrui, Chen Xiujin, Deng Ruiguang, Hu Xiaofei

Food and Machinery

To prepare monoclonal antibodies against soybean Kunitz trypsin inhibitor (KTI) with good immunological characteristics. BALB/c mice were used to immunize with 50 μg of KTI, the antiserum titer and sensitivity were identified via indirect ELISA and indirect competitive ELISA. The mice which serum has better titer and sensitivity were selected for cell fusing, then he hybridoma cell strain which stabilization secreted KTI monoclonal antibody (mAb) were screened. Thereafter, mAb was prepared by inducing ascites in vivo and identified the immunological characteristics. The result indicated that the NO.1 mouse was confirmed to produce the antibody with the highest titre, IC50 …

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Simultaneous Determination Of Flavonoids In Fruits Of Rosa Davurica Pall. By Hplc And Measurement Of Their Activities In Vitro, Di Song, Zhong Fangli, Zhang Xiaoli, Wang Xiaolin, Lei Yongping Aug 2019

Simultaneous Determination Of Flavonoids In Fruits Of Rosa Davurica Pall. By Hplc And Measurement Of Their Activities In Vitro, Di Song, Zhong Fangli, Zhang Xiaoli, Wang Xiaolin, Lei Yongping

Food and Machinery

Simultaneous determination of four flavonoids in extracts of the fruits of Rosa davurica pall.(FRDP) by high performance liquid chromatography (HPLC) was carried out, and the in vitro activities of extracts of FRDP, four flavonoids and their compound compatibility were measured by UV method. The results showed that the contents of hyperoside, rutin, quercetin and luteolin of the extract of FRDP were 607.98, 450.63, 187.32 and 12.68 μg/g respectively. The extracts of FRDP, four flavonoids and their compound compatibility all have certain antioxidant activities in vitro, and the activity of extracts of FRDP was stronger than that of compound compatibility. However, …

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Effects Of Far-Infrared Radiation Temperature On The Moisture Transfer Of Kiwifruit Slices, Zeng Ya, Liu Yunhong, Zhang Jiayi, Xi Huihan, Hu Runrun Aug 2019

Effects Of Far-Infrared Radiation Temperature On The Moisture Transfer Of Kiwifruit Slices, Zeng Ya, Liu Yunhong, Zhang Jiayi, Xi Huihan, Hu Runrun

Food and Machinery

In order to explore the water diffusion characteristics of kiwifruit during far-infrared radiation drying, low-field nuclear magnetic resonance (LF-NMR) technology was applied to analyze the influence of radiation temperature on internal water states and moisture migration of kiwifruits during drying. The results showed that drying time decreased significantly with the increasing of radiation temperature, and the ratio of average drying rates at radiation temperatures of 120, 160, 200, 240 and 280 ℃ were 1.00∶1.30∶1.54∶2.00∶2.50 respectively. The effective moisture diffusivity values was in the range of 2.85×10-10~7.03×10-10 m2/s, which could be improved with the increase in …

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Effects Of Leucine And Α-Ketoglutarate On The Weight, Serum, Visceral Organ Of Mice, Jin Shunshun, Yao Kang, Yin Yulong, Kang Baoju, Li Yuying, Wang Peng Aug 2019

Effects Of Leucine And Α-Ketoglutarate On The Weight, Serum, Visceral Organ Of Mice, Jin Shunshun, Yao Kang, Yin Yulong, Kang Baoju, Li Yuying, Wang Peng

Food and Machinery

Forty male C57BL/6 mice aged 4 weeks were selected and randomly divided into 4 groups. Mice in control groups drank normal water, while those in the experimental groups were treated 1.0% α-ketoglutarate acid (group Ⅰ), or 1.8% leucine (group Ⅱ), or 1.8% leucine and 1.0% α-ketoglutarate acid (group Ⅲ) via drinking water. The experimental lasted 35 days. The results showed as follows: ① The growth performance of group Ⅲ was 8.7%, 10.1%, and 10.4% lower than that of the groups control,ⅠandⅡ, respectively； ② Serum albumin in group Ⅲ was significantly higher than that of the groups control,ⅠandⅡ(P<0.05)； ③ The cardiac index of group Ⅲ increased by 19.3%, 13.6%, and 15.2%, respectively, compared with groups control,ⅠandⅡ； ④ The abdominal fat index of group Ⅲ was 24.1%, 10.0%, and 6.7% lower than that of groups control,ⅠandⅡ, the cross-sectional area of the gastrocnemius muscle of group Ⅲ was 46.9%, 20.2%, 27.9% higher than that of groups control,ⅠandⅡ, respectively. In summary, the combination of leucine and α-ketoglutaric acid can reduce the body weight of mice, strengthen the use of fat by organs, and increase the cross-sectional area of gastrocnemius muscle fibers.

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Isolation, Purification And Identification Of Antimicrobial Peptides From Ovalbumin, Jiang Yuqing, Chi Yujie Jul 2019

Isolation, Purification And Identification Of Antimicrobial Peptides From Ovalbumin, Jiang Yuqing, Chi Yujie

Food and Machinery

The antimicrobial peptides derived from ovalbumin were prepared by Pepsin hydrolysis. High antibacterial components were obtained by ultrafiltration and Superdex peptide 10/300. The antibacterial activity of antibacterial peptides against E.coli and Salmonella was used as an experimental index to screen the best antibacterial component and then conducted the reversed high-efficiency liquid phase chromatographic separation. After measuring the antibacterial activity of the 9 components, it was found that the C3 component had the highest antibacterial activity and the diameters of bacteriostasis circles were (19.32±1.45) and (18.74±1.27) mm, respectively. Then, the structure of antimicrobial peptides was identified by HPLC (electrospray ionization-massspectrometry, HPLC-ESI-MS). …

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Preparation And Characterization Of Lutein Loaded In Zein Nanoparticles, Jiao Yan, Han He, Chang Ying, Li Chong, Gao Jianwei Jul 2019

Preparation And Characterization Of Lutein Loaded In Zein Nanoparticles, Jiao Yan, Han He, Chang Ying, Li Chong, Gao Jianwei

Food and Machinery

The Zein-Lutein nanoparticles were prepared using zein as nanocarrier by anti-solvent method, and the structural characterization of the nanoparticles were studied. The optimal preparation process of Zein-Lutein was explored on the basis of single factor and orthogonal array experiments. The optimal preparation conditions were as followed: the ratio of the zein and lutein ratio was 20∶1, hydration time 150 min, hydration temperature 50 ℃, the coating rate of lutein 81.0%. Under the conditions, the average particle size was 398.3 nm, TEM images showed that the morphological and distribution of Zein-Lutein were changed when lutein was efficiently loaded into zein, and …

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The Analysis Of The Hydrolysis Releases Of Bound Aroma Compounds And Glycosyl Composition In Rose Roxbuighii Juice, Peng Bangyuan, Ding Xiaojuan, Zhao Zewei, Ding Zhuhong Jul 2019

The Analysis Of The Hydrolysis Releases Of Bound Aroma Compounds And Glycosyl Composition In Rose Roxbuighii Juice, Peng Bangyuan, Ding Xiaojuan, Zhao Zewei, Ding Zhuhong

Food and Machinery

By using the GC-MS，the composition of the bound aroma compounds after enzymatic hydrolysis and acid hydrolysis were analyzed, and the bound aroma compounds in Amberlite XAD-2 from Rose roxbuighii juice were also detected. According to the analysis of ROAV value, the emblematical aroma compounds were analyzed. Thereafter, the glycosyl composition of the bonded flavor compounds were also determined the characteristics of the hydrolyzable bonded compounds. The result showed that a total of 49 kinds of aroma substances were detected after the enzymatic hydrolysis and acid hydrolysis of Rose roxbuighir juice. 31 kinds of aroma substances were obtain by enzyme hydrolysis. …

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Changes And Migration Of Volatile Flavor Components In Freeze-Dried Peaches, Yan Qiuju, Wang Haiou, Zhu Hua, Wu Yulong, Zhou Feng, Wang Zhenjiong, Wang Renlei, Hua Chun Jul 2019

Changes And Migration Of Volatile Flavor Components In Freeze-Dried Peaches, Yan Qiuju, Wang Haiou, Zhu Hua, Wu Yulong, Zhou Feng, Wang Zhenjiong, Wang Renlei, Hua Chun

Food and Machinery

The composition and content of main volatile flavor components in fresh peach, freeze-dried peach and lyophilizer cold trap water were compared and analyzed by SPME-GC/MS. The results showed that there were 26, 18 and 11 volatile flavor components in fresh peach, freeze-dried peach and cold trap water, respectively. They mainly included aldehydes, alcohols, esters, hydrocarbons, heterocyclics and ethers. Volatile flavor components in fresh peaches changed and migrated during freeze-drying. The retained volatile flavor components in the freeze-dried peach mainly included hexanal, (E)-2-heptenal, (E)-2-octenal, benzaldehyde, pentanol, hexanol, (E)-2-hexen-1-ol, hexyl acetate, hexyl acetate, and γ-caprolactone. Furfural and diethylene glycol ether completely migrated …

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Cloning Of Aflatoxin-Detofizyme Gene And Fusion Expression In Escherichia Coli, Li Wang, Shi Dunsheng, Ding Ke, Cao Pinghua, Zhao Longmei Jul 2019

Cloning Of Aflatoxin-Detofizyme Gene And Fusion Expression In Escherichia Coli, Li Wang, Shi Dunsheng, Ding Ke, Cao Pinghua, Zhao Longmei

Food and Machinery

The ADTZ gene primers were synthesized through the ADTZ gene sequence published by GenBank. The ADTZ gene fragment was screened by PCR from the mixed bacterial solution which extracted of the moldy corn sample, and transformed into E. coli by constructing expression vector. The size and concentration of the ADTZ expression product were detected by SDS-PAGE. The degradation ability of the expression product to aflatoxin AFB1 was tested by enzymatic hydrolysis. The results showed that the ADTZ gene was successfully amplified from the moldy maize suspension. The full length of the ADTZ gene sequence was 2 088 bp, and …

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Optimization Of Conditions For Efficient Expression Of Recombinant Cellulose-Binding Domain-Glutamate Decarboxylase Of Enterococcus Faecium In Escherichia Coli, Yang Shengyuan, Lin Qian, Zhang Xiaoning, Zhen Jiayi Jul 2019

Optimization Of Conditions For Efficient Expression Of Recombinant Cellulose-Binding Domain-Glutamate Decarboxylase Of Enterococcus Faecium In Escherichia Coli, Yang Shengyuan, Lin Qian, Zhang Xiaoning, Zhen Jiayi

Food and Machinery

In order to avoid the interference of natural GAD expressed by the own genome of Escherichia coli, the recombinant cellulose-binding domain glutamate decarboxylase (CBD-GAD) was firstly immobilized by regenerated amorphous cellulose (RAC), and then the RAC-CBD-GAD immobilized enzyme was isolated and used as an evaluation index to optimize the culture conditions for highly efficient expression of CBD-GAD in E. coli GDMCC60445 by one-factor-at-a-time and Taguchi methods. The results indicated that the optimal medium for E. coli GDMCC60445 to express CBD-GAD was modified Luria-Bertani (LB) medium, which was consisted of 8 g/L tryptone, 6 g/L yeast extract, 10 g/L sodium chloride, …

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Application Of 3d Scanning Method In Radio Frequency Heating Simulation, Zhang Ruyi, Li Feng, Jiao Yang Jul 2019

Application Of 3d Scanning Method In Radio Frequency Heating Simulation, Zhang Ruyi, Li Feng, Jiao Yang

Food and Machinery

In order to improve the simulation accuracy, this paper took potatoes as examples, selected two irregular-shape potatoes, used a three-dimensional scanner to obtain the accurate geometries, imported the geometries into a multiphysics finite element software COMSOL Multiphysics, solved its temperature distribution field under different powers/voltages, and carried experiment verifications. Results show that after 40 minutes of RF heating, the temperature distribution, maximum and minimum temperature values and internal time-temperature curves of the simulated results are in good agreement with the experimental results with a simulation accuracy over 90%. This method is suitable for simulating RF heating processes of …

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Study On The Dynamics Of Quality Changes In The Process Of Western-Style Ham Cooking, Shi Yu, Deng Li, Xie Le, Yu Bingyan, Liao Xiaomei, Su Jieyu Jul 2019

Study On The Dynamics Of Quality Changes In The Process Of Western-Style Ham Cooking, Shi Yu, Deng Li, Xie Le, Yu Bingyan, Liao Xiaomei, Su Jieyu

Food and Machinery

The stability and reliability of kinetic parameters can help enterprises to better predict food quality and use resources efficiently. In this study, the changes of mature quality factors (color and shear-force) and overheating quality factors (moisture and content) in the process of western-style ham cooking were measured and analyzed by kinetic methods. The results showed that in the process of cooking, the changes of color, the moisture content and shear-force of western-style ham followed the first-order reaction kinetics. The z-values of the luminance value and the redness value were 49.69 ℃ and 41.85 ℃, respectively, and the Ea-values were 46.73 …

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Effect Of Ultrasonic Treatment On The Rheological Properties Of Liquid Whole Egg, Bai Xiting, Zhu Wenxue, Ma Yitong, Liu Sijia, Li Ning Jul 2019

Effect Of Ultrasonic Treatment On The Rheological Properties Of Liquid Whole Egg, Bai Xiting, Zhu Wenxue, Ma Yitong, Liu Sijia, Li Ning

Food and Machinery

In order to study the effect of ultrasonic treatment on the rheological properties of liquid whole egg, the different ultrasonic energy density (0.4, 0.8, 1.2, 1.6, and 2.0 W/g) and the ultrasonic time (0, 5, 10, 15, and 20 min) on the liquid whole egg were studied, and then the rheological properties of rheometer was measured. The static rheological experimental results showed that the egg was a pseudoplastic non-Newtonian fluid with the shear thinning phenomenon. The rheological curve was obedient to the Herschel-Bulkley model at the temperature of 0~40 ℃. With the increase of ultrasonic time and ultrasonic energy density, …

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Composition Of Sn-2 Fatty Acids In Yak Milk Fat From Qinghai Province, Feng Xiya, Zhang Yu, Suo Huayi, Wang Hongwei Jul 2019

Composition Of Sn-2 Fatty Acids In Yak Milk Fat From Qinghai Province, Feng Xiya, Zhang Yu, Suo Huayi, Wang Hongwei

Food and Machinery

The composition of Sn-2 fatty acids in yak milk fat was determined by gas chromatograph and TLC. The Sn-2 fatty acid composition of yak milk fat at different altitudes was studied to determine the effect of different altitudes on triglyceride structure. The results showed that there were 12 kinds of total fatty acids of triglyceride in Qinghai yak milk fat, and the highest contents were palmitic acid (31.35%～36.48%), oleic acid (24.91%～30.99%) and stearic acid (9.82%～13.87%). The composition of Sn-2 fatty acids in Qinghai yak milk fat was as follows: hexanoic acid (0.66%～1.02%), decanoic acid (2.46%～3.98%), lauric acid (2.43%～4.88%), tetradecanoic acid …

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Exploration Of The Formation And Mechanism Of Vbnc State Of Salmonella Enterica Serovar Typhimurium During Hydrogen Peroxide Disinfection, Nie Xinying, Liao Hongmei, Liu Yuanfa Jul 2019

Exploration Of The Formation And Mechanism Of Vbnc State Of Salmonella Enterica Serovar Typhimurium During Hydrogen Peroxide Disinfection, Nie Xinying, Liao Hongmei, Liu Yuanfa

Food and Machinery

In order to determine the effective bactericidal concentration of hydrogen peroxide, Salmonella enterica serovar Typhimurium was used as a target microorganism to explore the effect of hydrogen peroxide on activity and culturability of it in tap water and its viable but non-culturable (VBNC) state by means of molecular biology. The results showed that lower hydrogen peroxide concentration (0～15 mmol/L) could kill some S. Typhimurium, which could be completely sterilized with 1 mol/L hydrogen peroxide. It was also found that 4.08 lg(CFU/mL) S. Typhimurium could be induced into a VBNC state as exposure to 15 mmol/L hydrogen peroxide. The morphology and …

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Establishment Of Trace Pentachlorophenol And Its Sodium Salt In Animal-Origin Foods By Automated Solid Phase Extraction-Coupled With Ultra Performance Liquid Chromatography-Tandem Mass Spectrometry, Chen Yanhong, Chen Sui, Song Anhua, Huang Jingchu, Chen Yueming, Liu Jia, Wang Yu Jul 2019

Establishment Of Trace Pentachlorophenol And Its Sodium Salt In Animal-Origin Foods By Automated Solid Phase Extraction-Coupled With Ultra Performance Liquid Chromatography-Tandem Mass Spectrometry, Chen Yanhong, Chen Sui, Song Anhua, Huang Jingchu, Chen Yueming, Liu Jia, Wang Yu

Food and Machinery

In order to develop a method for the determination of trace pentachlorophenol and its sodium salt in animal-origin foods by automated solid phase extraction-coupled with ultra performance liquid chromatography-tandem mass spectrometry, the effects of extractive solvents, solid phase extraction columns, eluents, mass spectrum and chromatographic separation conditions, internal standards were studied and compared. Finally, the sample was extracted by 5% ammonia acetonitrile, purified by MAX solid phase extraction column and eluted by 10% formic acid methanol. The extract was dried-up with nitrogen and re-dissolved with acetonitrile water solution (50∶50)．The solution was separated on a Kinetex C18 column (100 mm×2.1 …

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Simultaneous Determination Of Traditional And New Types Of “Lean Meat Powder” In Pork By Ultra Performance Liquid Chromatography-Tandem Mass Spectrometry, Liu Di, Han Li, Huang Kun, Wang Bin, Wang Heng, Yu Tingting, Wang Huixia Jul 2019

Simultaneous Determination Of Traditional And New Types Of “Lean Meat Powder” In Pork By Ultra Performance Liquid Chromatography-Tandem Mass Spectrometry, Liu Di, Han Li, Huang Kun, Wang Bin, Wang Heng, Yu Tingting, Wang Huixia

Food and Machinery

An analytical method for the simultaneous determination of new and traditional "lean meat powder"（Clenbuterol, Salbutamol, Ractopamine, Terbutaline, Isoprophane, Chlorpheniramine, Simmatrol, Fenoterol and Olaquindox and its metabolites） in pork by ultra performance liquid chromatography-tandem mass spectrometry was established. Pork samples were extracted with 2% formic acid-acetonitrile solution. The extracts were purified by neutral alumina column. After being dried and concentrated by nitrogen, the hexane was degreased and determined by ultra performance liquid chromatography-tandem mass spectrometry and quantified by internal standard method. Waters HSS C18 column (100 mm×2.1 mm, particle size 1.8 μm) was used. The mobile phase was separated by …

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Uncertainty Evaluation Of Determination Of L-Hydroxyproline In Raw Milk By High Performance Liquid Chromatography-Tandem Mass Spectrometry, Kang Ning, Guo Lili, Liu Xiaolin, Hua Jin, Gao Lizhen Jul 2019

Uncertainty Evaluation Of Determination Of L-Hydroxyproline In Raw Milk By High Performance Liquid Chromatography-Tandem Mass Spectrometry, Kang Ning, Guo Lili, Liu Xiaolin, Hua Jin, Gao Lizhen

Food and Machinery

The content uncertainty of L-hydroxyproline in dairy products was evaluated by referring to SN/T 3929—2014 “Determination of L-hydroxyproline in export foods”. According to JJF 1059.1—2012 “Measurement uncertainty evaluation and expression”, and CNAS—GL006:2019 “The evaluation guidance for uncertainty in chemical analysis”, and these two existing standards for evaluation of uncertainty of the basic procedures, a mathematical model was established for the analysis of determination of L-hydroxyproline content in dairy products by high performance liquid chromatography tandem mass spectrometry, which introduced in the process of the measurement uncertainty components. The measured results of synthetic standard uncertainty and expanded uncertainty were obtained by …

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Uncertainty Evaluation Of Pesticide Residues In Vegetable Based On Gray Model, Cheng Fuan, Zhang Jiayan, Feng Xugang, Gao Wenbin, Qian Muyun Jul 2019

Uncertainty Evaluation Of Pesticide Residues In Vegetable Based On Gray Model, Cheng Fuan, Zhang Jiayan, Feng Xugang, Gao Wenbin, Qian Muyun

Food and Machinery

The uncertainty of pesticide residues in vegetables is an important indicator to judge whether the detection of pesticide residues is good or not in quality, which is too difficult to evaluate if the distribution function of the detected value is unknown. This study proposes an evaluation method based on the gray model to solve this problem. Steps are adopted as follows: first of all, detect the nine sorts of organochlorine and pyrethroid pesticide residues in vegetables by use of gas chromatography; secondly, establish, taking the detection of pesticide residues as a kind of gray process, the mathematical model of gray …

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Research On Early Warning And Evaluation Of Food Safety Network Public Opinion Based On Interval Analytic Hierarchy Process, Gao Ying Jul 2019

Research On Early Warning And Evaluation Of Food Safety Network Public Opinion Based On Interval Analytic Hierarchy Process, Gao Ying

Food and Machinery

Aiming at the uncertainty of online public opinion early warning and evaluation for food safety, a new online public opinion early warning and evaluation method for food safety was proposed. Firstly, a multi-level evaluation index system of public opinion early warning in the food safety network was established, and the warning grade and interval number grade of public opinion in the food safety network was put forward. The interval number weight of public opinion early warning evaluation index in the food safety network was determined by interval analytic hierarchy process. Then, combining with the interval number theory, an early warning …

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Design And Development Of Avertical Multi-Station Lotus Core Puncher, Wang Wangping, He Liu, Wang Yiquan, Zhang Yonglin, Yu Nanhui Jul 2019

Design And Development Of Avertical Multi-Station Lotus Core Puncher, Wang Wangping, He Liu, Wang Yiquan, Zhang Yonglin, Yu Nanhui

Food and Machinery

In view of the current of dry lotus core punching, a vertical multi-station lotus core puncher has been designed and developed. This paper introduces the whole structure and the working of the puncher, and maltese mechanism, positioning and clamping mechanism and space cam mechanism are explained in detail. The results of prototype test indicated that the once punching rate of no less than 92%, the thorough punching rate of no less than 85% and the broken rate of kernels of less than 5%.

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Application Of Nurbs Curve In Rotor Profile Design Of Roots Pump, Liu Zhenchao, He Xueming, Huang Hainan Jul 2019

Application Of Nurbs Curve In Rotor Profile Design Of Roots Pump, Liu Zhenchao, He Xueming, Huang Hainan

Food and Machinery

A design method of roots pump rotor profile based on NURBS curve was proposed. Combining the design process from peak curve to valley curve, the reasonable design area of peak curve was designed, and the envelope condition of NURBS curve was solved. The method of determining the rotor profile of roots pump with NURBS curve by control point and weight factor was designed. The method redesigned the involute rotor profile and the average error was in 0.1 μm which was in a reasonable error range. The feasibility of designing Roots pump rotor profile with NURBS curve was verified. Finally, the …

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Research On Bearing Fault Diagnosis Method Based On Emd And Ar Model, Shang Changpei, Zhang Songhong Jul 2019

Research On Bearing Fault Diagnosis Method Based On Emd And Ar Model, Shang Changpei, Zhang Songhong

Food and Machinery

Bearing is a vulnerable component in food processing machinery and packaging machinery. Bearing status is related to the safe operation of machinery. In this study, bearing fault diagnosis method based on EMD and AR models was adopted to solve the problem of bearing fault diagnosis, ensuring the maximum quality and efficiency of food production. A bearing fault dynamics model integrating outer ring, inner ring, and rolling were built to obtain the bearing vibration signal during the operation of the bearing. Therefore, the bearing fault diagnosis method based on EMD and AR model was adapted to decompose the bearing vibration signal …

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Improvement Of Vertical Molding Passage In Yb95a Carton Overwrapper, Zhou Furu, Shi Youzhi, He Ren, Zhang Ning Jul 2019

Improvement Of Vertical Molding Passage In Yb95a Carton Overwrapper, Zhou Furu, Shi Youzhi, He Ren, Zhang Ning

Food and Machinery

To avoid the product defects caused by the friction marks in cigarette carton film, the molding passage of YB95A carton overwrapper was improved. When the particle plate was welded on the surface of the channel and the first lifting structure for forming was designed to rolling-folding, the friction that the transparent paper bore in the process of wrapping and transporting was greatly reduced. The application of new material and new structure demonstrated that the rate of carton film with friction marks decreased from 49.21% to 3.49% after the improvement and these quality defects had been effectively solved.

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Design And Application Of Stepped Stem Classifier With High Frequency, Zheng Xi, Xia Zilong, Yuan Haixia, Wang Shanshan, Li Jun, Guan Aizhang, Wang Yonghai, Yang Ming, Zeng Weizhong Jul 2019

Design And Application Of Stepped Stem Classifier With High Frequency, Zheng Xi, Xia Zilong, Yuan Haixia, Wang Shanshan, Li Jun, Guan Aizhang, Wang Yonghai, Yang Ming, Zeng Weizhong

Food and Machinery

To improve the online screening effect of tobacco stem, and ensure quality of the processing materials of fibriform stems in slim cigarettes, a new type of stem screening device is designed by using high-frequency and low-intensity vibration technology, which has been applicated online. The device is mainly composed of a two-stage tank body, a plurality of sets of strip screens and vibration motors, realizing reciprocating motion of the classifier by high-frequency and low-intensity vibration force. The device has high vibration frequency, good screening effect and low energy consumption, which is a stepped stem classifier with high frequency satisfying the continuous …

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Study On The Modification Conditions And Properties Of The Zein-Inulin, Chen Youming, Zhang Huijun, Guo Hao, Sha Dixin, Wang Yizheng Jul 2019

Study On The Modification Conditions And Properties Of The Zein-Inulin, Chen Youming, Zhang Huijun, Guo Hao, Sha Dixin, Wang Yizheng

Food and Machinery

The modification conditions of the film were optimized using zein and inulin as raw materials, and the properties of them were measured. The results showed that the optimum conditions were material ratio 10∶1 (g/g), pH 6 with reacting for 48 hours. Under these conditions, the tensile strength of the zein-inulin film was 10.12 MPa, with 37.5% of the graft. the light transmittance, water resistance, oil absorption, and oxygen barrier of inulin-modified zein films were better than those in the original ones.

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Study On Coated Antibacterial And Mildew Proof Packaging Paper And Its Properties, Wang Zhiqiang, Yang Fuxin, Chen Chenwei Jul 2019

Study On Coated Antibacterial And Mildew Proof Packaging Paper And Its Properties, Wang Zhiqiang, Yang Fuxin, Chen Chenwei

Food and Machinery

The antibacterial liquid was prepared by dissolving potassium sorbate, sodium dehydroacetate and sodium benzoate in polyvinyl alcohol solution, and then the antibacterial liquid was applied to kraft paper to prepare antibacterial paper for packaging. The inhibitory effects of the antibacterial paper on Escherichia coli and Staphylococcus aureus were tested by the bacteriostatic circle method, and the effects of the coated antibacterial solution on the tensile strength, tear strength, water vapor permeability coefficient, oxygen permeability and microstructure of the antibacterial paper were studied as well. The results showed that the tensile strength, tear strength, water vapor permeability coefficient and oxygen permeability …

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Intelligent Packaging Design Trend Under The Background Of Iot Technology, Liang Yun Jul 2019

Intelligent Packaging Design Trend Under The Background Of Iot Technology, Liang Yun

Food and Machinery

This paper expounds the new classification and design form of packaging design brought by the development of IOT (Internet of Things) technology, which is characterized by the connection of things. In view of the characteristics of perception and communication between things and things in IOT technology, case analysis method is used to illustrate the characteristics of IOT technology and the changes brought about by the application of IOT technology to packaging design. The application and innovation ways of intelligent packaging design under the background of IOT Technology was proposed. It is pointed out that the technological innovation brought by IOT …

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