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Articles 271 - 300 of 524
Full-Text Articles in Food Biotechnology
Analysis Of Chemical Ingredients Changes And Aroma Compounds In Brewing Process Of Mulberry Wine, Yang Fang, Liu Tie, Liu Yan, Wang Sha, Wang Danhong
Analysis Of Chemical Ingredients Changes And Aroma Compounds In Brewing Process Of Mulberry Wine, Yang Fang, Liu Tie, Liu Yan, Wang Sha, Wang Danhong
Food and Machinery
To analyse the variation of reducing sugar, total acid, total flavonoids, ethanol content and aroma compounds in brewing process of mulberry wine. The fermentation processes were: fermentation temperature of 15.3 ℃, inoculation quantity of 8.00 g/L, sucrose content of 12.80 g/100 g, total fermentation time 24 days, and sampling every 3 days to determine reducing sugar, total acid, total flavonoids, and ethanol content of mulberry wine. The aroma components were determined by gas chromatography-mass spectrometry. Results: The reducing sugar in mulberry wine decreased quickly at the first nine days and levelled off. The total acid content were steady between 5~6 …
Effect Of Cooking Methods On The Quality And Nutritive Contents Of Pork, Zhang Jie, He Hang, Xiong Zibiao
Effect Of Cooking Methods On The Quality And Nutritive Contents Of Pork, Zhang Jie, He Hang, Xiong Zibiao
Food and Machinery
The effects were andyzed, including different various methods (steaming, boiling, frying and baking) on meat quality, routine nutrient composition, amino acid and fatty acid content of pork. The results showed that the pH value and water content after cooking were significantly lower than those of fresh control (P＜0.05), while, the hardness, elasticity, adhesion, ash, crude protein and PUFA content were significantly increased (P＜0.05). The cooking loss rate of frying and microwave was significantly higher than that of steaming, boiling and baking (P＜0.05). The ash content of boiling have no significant change (P＞0.05), while the other cooking methods were significantly increased …
Aptamer-Based Colorimetric Detection Of Cd2+, Zhao Xu, Wu Shijia, Yue Lin, Wang Zhouping
Aptamer-Based Colorimetric Detection Of Cd2+, Zhao Xu, Wu Shijia, Yue Lin, Wang Zhouping
Food and Machinery
In this study, we presented a simple, rapid and sensitive colorimetric assay for the detection of cadmium (Cd) based on enzyme-linked oligonucleotides. The specific binding of aptamer to Cd2+ led to the decrease of horseradish peroxidase(HRP) on the microtiter plate, since HRP could not be bind onto through the hybridization of the aptamer and complementary DNA strand. It resulted in the change of characteristic peaks at 450 nm, helping to quantitatively detect Cd2+. Under the optimal conditions, the detection limit could be as low as 0.05 ng/mL, and the linear response for Cd2+ in a concentration …
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
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 …
Mining Of Serotype Specific Genes And Establishment Of A Pcr For Detection Salmonella Enterica Serovar Heidelberg, Zhai Ligong, Guo Yuanxin, Wang Junying, Wang Beibei
Mining Of Serotype Specific Genes And Establishment Of A Pcr For Detection Salmonella Enterica Serovar Heidelberg, Zhai Ligong, Guo Yuanxin, Wang Junying, Wang Beibei
Food and Machinery
Salmonella enterica serovar Heidelberg,（SH）is pathogenic serotypes within Salmonella. Using BLAST and PCR validation for all CDSs of SH, four serovar-specific genes were identified including SeHA_C2639, SeHA_C2640, SeHA_C3259 and SeHA_C3258. A PCR protocol was developed by pHAm8 (350 bp) of SH-specific primer and 139-141 (284 bp) of Salmonella-specific primer and evaluated for the detection of SH. The result showed that the 55 strains of serotype of Salmonella and other common foodborne pathogens proved that the PCR assay had very good specificity for the detection of SH. The detection limit was 6.1 × 102 CFU/mL in pure culture. It was shown …
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, Luo Guiyi, Song Chunfang, Li Zhenfeng, Xu Wanxiu
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 …
Study On The Wet Preparation Of Lotus Leaf Powder And Its Grinding Kinetics In The Stirred Media Mill, Yu Jianfeng, Zhao Jiang, Lou Qi, Liang Jie, Wang Li
Study On The Wet Preparation Of Lotus Leaf Powder And Its Grinding Kinetics In The Stirred Media Mill, Yu Jianfeng, Zhao Jiang, Lou Qi, Liang Jie, Wang Li
Food and Machinery
The stirring medium mill was employed to prepare lotus leaf powder. The Variation of particle size of lotus leaf powder within 30 min at different stirring speeds were investigated. The grinding kinetics of the lotus leaf powder was studied using the analytical model of the crushing process. The grinding chamber shear rate distribution and the average collision energy of the grinding media were analyzed at different stirring speeds coupling CFD-DEM method. The results showed that the grinding rate of the lotus leaf powder increased with the increase of the stirring speeds in the range of 500～3 000 r/min. The fluid …
The Research And Application Of Polynomial Fitting In Cam Curve Design Of Cap Screwing Machine, Wu Jia, He Xueming, He Kai, Zhang Rong
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, Wang Wen, Li Wenke, He Shanghong, Liu Guangming
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 …
A Research On Uniform Motion Of Sliding Block In Slider-Crank Mechanism, Li Haoxuan, He Hengjian, Liu Haonan, Li Yuelin
A Research On Uniform Motion Of Sliding Block In Slider-Crank Mechanism, Li Haoxuan, He Hengjian, Liu Haonan, Li Yuelin
Food and Machinery
A variable crank length device with cam slot was added to the slide mechanism for achieving the uniform motion of the slider in the working stroke. The kinematics and dynamics analysis of this mechanism was carried out by using complex vector method and dynamic statics theory. Finally, the motion module of SolidWorks was used for the Motion analysis of this mechanism, and the motion characteristics and dynamic characteristics of the mechanism were obtained. The results showed that it was feasible to achieve uniform motion of slider in variable length crank slider mechanism.
Research On Food Packaging Design Based On Multidimensional Constraints, He Xuemei, Cao Tinglei, Lu Danqiong
Research On Food Packaging Design Based On Multidimensional Constraints, He Xuemei, Cao Tinglei, Lu Danqiong
Food and Machinery
Through analysis and research, this paper proposed a multidimensional constraint design model for food packaging, and clarified its advantages to the traditional packaging design. The model was built from the three dimensions of demand constraints, goal constraints, and resource constraints. Through the researches of user requirements, market requirements, first party requirements, resource limitations, etc., the corresponding design mapping domains under the relevant constraints were obtained, to clarify the elements of food packaging design, color, graphics, specifications, style, culture, and completed the design ultimately. The feasibility of the method and the model was verified by the actual case of the Qian …
Effect Of Different Tipping Glue And Tipping Paper On The Permeability Of Glue, Zhang Jing, Ma Xiaowei, Feng Xin, Qu Guofu, Wang Dongfei, Wang Jianmin
Effect Of Different Tipping Glue And Tipping Paper On The Permeability Of Glue, Zhang Jing, Ma Xiaowei, Feng Xin, Qu Guofu, Wang Dongfei, Wang Jianmin
Food and Machinery
In order to evaluate the effect of glue penetration on cigarette filter ventilation rate, and provide the basis for tipping glue and tipping paper selection, using the PVC rectangular pore pressure plate control the area of the original coating area, calculate the penetration area of coloring glue using pixel method, estsblished a method to measure the natural permeability of the tipping glue, and the natural permeability of 2 kinds of tipping glue on 12 kinds of tipping paper was measured and analyzed. The results showed that: ① the natural permeability of 2 kinds of tipping glue on 12 kinds of …
Research On Experiential Food Package Design From The Perspective Of Body Perception, Tang Xinxing, Sun Xiangming, Gu Xiaofeng
Research On Experiential Food Package Design From The Perspective Of Body Perception, Tang Xinxing, Sun Xiangming, Gu Xiaofeng
Food and Machinery
Analyzed the neglects of body perception on current food package design, emphasized the significance of the research on experiential food package design and through practical examples explained the five types of experiential food package, which are sensory package, sustainable package, interesting package, situational package and emotional package.
Application Of Regional Cultural Symbol Translation In Design Of Nianli Food Package In Western Guangdong, Yan Li, Jiang Leige
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 …
Design Of Hickory Nuts Shell And Kernel Sorting System Based On Fuzzy Clustering Algorithm, Wang Tianyu, Cao Chengmao, Xie Chengjian, Li Zheng
Design Of Hickory Nuts Shell And Kernel Sorting System Based On Fuzzy Clustering Algorithm, Wang Tianyu, Cao Chengmao, Xie Chengjian, Li Zheng
Food and Machinery
In order to solve the problem of hickory nuts’ material mixing which was difficult to screen after breaking the shells, an image processing algorithm for hickory nuts color and texture selection was proposed based on fuzzy c-means clustering algorithm. The program with user interface for the separation of hickory nuts’ shells and kernels was developed on the Labview software platform. By extracting the characteristic data the hickory nuts with separation substances value of hue, saturation, value, angular second moment, entropy, inverse different moment and correlation, building a sample set of characteristic data, optimal data subset is preferred in accordance with …
Study On Quality Change And Shelf Life Of Guangdong Style Salt Baked Chicken Storaged In 4 ℃, Zhou Ledan, Ai Minmin, Ling Ziting, Zhang Ying, Li Hengyong, Xie Yongbiao, Liu Cong, Pan Shanshan, Jiang Aimin
Study On Quality Change And Shelf Life Of Guangdong Style Salt Baked Chicken Storaged In 4 ℃, Zhou Ledan, Ai Minmin, Ling Ziting, Zhang Ying, Li Hengyong, Xie Yongbiao, Liu Cong, Pan Shanshan, Jiang Aimin
Food and Machinery
The quality change and shelf life of Guangdong packaged salted chicken were studied, which was storaged in 4 ℃. Results: Ssensory score decreased significantly in the 15th, 18th and 21th days (P<0.05), while, it exceeded acceptance in the 18th day, with the brightness L* value and yellowing a* value decreasing significantly (P<0.05); pH increased first and then decreased (P>0.05). The difference was not significant, volatile salt nitrogen and acid value were all increasing, and the variation of volatile salt nitrogen and nitrogen in chicken skin was significantly different (P<0.05), in the 18th day, the volatile salt based nitrogen in the chicken was 15 mg/100 g and the chicken acid value was significantly different in the 15th, 18th and 21th days (P<0.05); the shear force decreased significantly (P<0.05), while the hardness, chewiness and the tensile strength of chicken skin increased significantly (P<0.05); the total number of Escherichia coli and colonies were not beyond the limit of going abroad, and Salmonella was not detected. Therefore, the quality of cantonese style salt baked chicken with vacuum packaging decreased with the prolongation of storage time at 4 degree storage, suggesting that the longest storage period less than 15 days.
Quality Changes And Shelf Life Of Ready-To-Eat Penaeus Vannamei Stored In Ambient Temperature, Guo Quanyou, Wang Xiaojin, Jiang Chaojun
Quality Changes And Shelf Life Of Ready-To-Eat Penaeus Vannamei Stored In Ambient Temperature, Guo Quanyou, Wang Xiaojin, Jiang Chaojun
Food and Machinery
The shelf life and survival bacterial species of ready-to-eat Penaeus vannamei during ambient temperature storage were studied. The quality changes and shelf life were observed by the sensory, physico-chemical, microbiological evaluation and electronic nose analysis, the bacteria species were identified by 16S rRNA sequencing. The results showed that initial sensory quality, physical and chemical indicators was pretty good. In the first 4 months, the water content, water activity, pH, sanility and color (red degree and yellow degree) had no significant differences, and then, the water content and Aw decreased, but pH and sanility increased, while the red degree and yellow …
Effects Of Different Packaging Methods On Beef Quality During The Postmortem Aging, Fu Qingquan, Zhang Wangang, Wang Haiou, Song Shangxin, Chen Shoujiang
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 …
Quality Changes Of Salmon Fillet With Different Packagings During The Storage, Shen Qiuxia, Li Mingyuan, Hu Yongzheng, Guo Jichuan, Wang Xiaojun, Lu Chaoting, Ji Li, Wen Xiaohui, Ding Wenwu
Quality Changes Of Salmon Fillet With Different Packagings During The Storage, Shen Qiuxia, Li Mingyuan, Hu Yongzheng, Guo Jichuan, Wang Xiaojun, Lu Chaoting, Ji Li, Wen Xiaohui, Ding Wenwu
Food and Machinery
In order to explore the physico-chemical quality changes of vacuum packaging and nitrogen-filled packaging salmon fillet stored at 4 ℃ and 10 ℃, and some indicators were analyzed periodically, including the sensory evaluation, texture, pH value, and the values of TVB-N and TBA. Volatile components of salmon fillet with different treatments, detected by an electronic nose, were analyzed by loading analysis (LA) and principal component analysis (PCA). The results showed that the sensory scores, elasticity, resilience and chewiness values decreased gradually with the extension of storage time; TVB-N values and TBA values decreased gradually, while hardness values of fillet increased …
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
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 …
Optimization Of Steam Explosion Pretreatment For Polysaccharides Extraction From Achyranthes Bidentata Radix And Of Its Antioxidant Activity Evaluation, Yi Junpeng, Wang Sai, Li Xin, Yang Yahuang, Zhao Pengcheng, Zhu Wenxue
Optimization Of Steam Explosion Pretreatment For Polysaccharides Extraction From Achyranthes Bidentata Radix And Of Its Antioxidant Activity Evaluation, Yi Junpeng, Wang Sai, Li Xin, Yang Yahuang, Zhao Pengcheng, Zhu Wenxue
Food and Machinery
Extraction yield of polysaccharides from Achyranthes bidentata Radix (AbR) was increased by steam explosion pretreatment. Based on the results of single-factor experiments, the response surface methodology was employed to further optimize the steam explosion pretreatment conditions. The effect of steam explosion pretreatment on the DPPH radical scavenging activity and O2- radical scavenging activity of Achyranthes bidentata Polysaccharides (AbPS) was evaluated. The optimum conditions was determined as follows: the water/AbR ratio 11%, steam explosion pressure, 1.6 MPa; residence time 63 s. After pretreatment under the optimum conditions, the extraction yield of polysaccharides from AbR was found to be 11.88%, which …
The Effects Of Maca On Energy Metabolism In Sd Female Rats, Zhu Yuzhu, Zhu Ping
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. …
Processing Of Water-Soluble Reducing Sugar From Extracted Green Tea Residue By Different Degradation Methods, Kong Yingying, Liu An, Xu Wei, Zhang Tuo, Gong Zhihua, Xiao Wenjun
Processing Of Water-Soluble Reducing Sugar From Extracted Green Tea Residue By Different Degradation Methods, Kong Yingying, Liu An, Xu Wei, Zhang Tuo, Gong Zhihua, Xiao Wenjun
Food and Machinery
In order to further develop and utilize the polysaccharides in tea residue, taking tea residue after green tea water extraction as raw material, and the yield of water-soluble reducing sugar was taken as the index, the effects of irradiation degradation + alkali degradation + acid degradation on green tea residue preparation of water-soluble reducing sugars were discussed on the basis of optimization of radiation degradation, alkali degradation and acid degradation for preparation of water-soluble reducing sugars. Results: The best degradation rate of irradiation was 1 200 kGy with a yield of 4.13%. The best combination of alkali degradation was 0.05 …
Optimization On Extraction Technology And Analysis Of Subunit Component Of Bamboo Bean Albumin, Yao Haixia, Wang Juan, Wang Limei, Qi Bin
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 …
Optimization On Preparation Of Osmanthus Extracts By Enzymes Treatment, Zhang Xuesong, Pei Jianjun, Zhao Linguo, Tang Feng, Fang Xianying
Optimization On Preparation Of Osmanthus Extracts By Enzymes Treatment, Zhang Xuesong, Pei Jianjun, Zhao Linguo, Tang Feng, Fang Xianying
Food and Machinery
To improve the yield and quality of Osmanthus extracts, several techniques were applied including the enzymatic hydrolysis by β-glucosidase and pectinase complex along with petroleum ether extraction and GC-MS analysis. The enzymatic hydrolysis process was optimized usingresponse surface methodology, and a reliable multiple quadratic regression model was established. The results showed that the best levels of the factors were as followed: pH 4.7, time 2.6 h, temperature 46 ℃, ratio of material to liquid 19.81 (mL/g), and the amount of enzyme complex 54.4 IU/g with 48.1% β-glucosidase activity, which was confirmed by experiments with an extraction yield of 3.32%, an …
Research Progress On Performance Optimization Of Impingement Quick-Freezing Equipment With Nozzle Structure, Shu Zhitao, Xie Jing, Yang Dazhang
Research Progress On Performance Optimization Of Impingement Quick-Freezing Equipment With Nozzle Structure, Shu Zhitao, Xie Jing, Yang Dazhang
Food and Machinery
The equipment that impinges the object with high velocity airflow and freezes it quickly is called impingement quick-freezing equipment. The nozzle form of the equipment is one of the important factors to determine the flow field in the freezing zone, which affects the heat transfer characteristics between the object and the surrounding environment. Based on the nozzle structure of the impingement quick-freezing equipment, the influence of the inclined angle, arrangement and shape of the nozzle on the heat transfer characteristics of the flow field in the impingement quick-freezing equipment is discussed in this paper. Find that the nozzle-to-plate spacing（H/d）and the …
Research Progress Of Extraction, Chemical Composition And Function Of Hemp Seed Oil, Chen Zehua, Chen Tong, Li Wei, Liu Fei, Du Jie, Feng Konglong, Cao Yong
Research Progress Of Extraction, Chemical Composition And Function Of Hemp Seed Oil, Chen Zehua, Chen Tong, Li Wei, Liu Fei, Du Jie, Feng Konglong, Cao Yong
Food and Machinery
Hemp seed oil has a good application prospects in function of hypolipidemic, anti-oxidation and anti-aging which can meet the needs of people's diet health. This review summarized different extraction methods and chemical components of Hemp oil, and the research on biological activity, looking forward to the development prospects of Hemp oil and providing the basis for its development and utilization.
Screening And Identification Of Special Yeast For Kiwi Wine, Jiang Cheng, Wei Miaohong, Liu Lu, Zhao Yaqin, Zhao Jianglin, Hou Xiaoyan, Chen Anjun
Screening And Identification Of Special Yeast For Kiwi Wine, Jiang Cheng, Wei Miaohong, Liu Lu, Zhao Yaqin, Zhao Jianglin, Hou Xiaoyan, Chen Anjun
Food and Machinery
In order to screen raw and low-yield methanol kiwifruit yeast and provide special strains resources to the kiwifruit wine production. Strains were identified by colony morphology and 18S rDNA sequencing to determine the species relationship of the three strains of yeast. The fermentation capacity, alcohol and sulfur dioxide tolerance were evaluated. Additionally, the three strains were used for kiwifruit wine fermentation, and the physicochemical properties, methanol content and volatile flavor compounds of the product were determined. The three strains were identified as Pichia guilliermondii by molecular biology. Among them, Q3 had the strongest fermentation capacity, it could tolerate 16% of …
Effect Of Extrusion Processing Parameters On The Polyphenol Content And Expansion Ratio Of Summer And Autumn Green Tea, Wang Xiulan, Liang Jin, Zhang Yifang, Liu Zhengquan, Zhou Yibin
Effect Of Extrusion Processing Parameters On The Polyphenol Content And Expansion Ratio Of Summer And Autumn Green Tea, Wang Xiulan, Liang Jin, Zhang Yifang, Liu Zhengquan, Zhou Yibin
Food and Machinery
In this paper, the extruded summer and autumn green tea powder processed with a twin screw extruder, the effects of material moisture, barrel temperature and screw speed on the content of tea polyphenols in green tea powder was studied after extruding. Moreover, the leaching functional components and microstructure changes were also studied. The results showed that the moisture content of the material increased, and the content of tea polyphenols decreased first and then increased; increasing the barrel temperature could increase the leaching of tea polyphenols, while the high temperature would lead to the loss of tea polyphenols; increasing the screw …