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Articles 3151 - 3180 of 5215

Full-Text Articles in Food Biotechnology

Determination And Comparison Of Hydrolyzed Amino Acids And Free Amino Acids In Six Kinds Of Grape Seeds, Wei Yangfei, Song Hai, Yue Guoren, Zhang Hongxi, Li Caixia Sep 2018

Determination And Comparison Of Hydrolyzed Amino Acids And Free Amino Acids In Six Kinds Of Grape Seeds, Wei Yangfei, Song Hai, Yue Guoren, Zhang Hongxi, Li Caixia

Food and Machinery

High performance liquid chromatography(HPLC) was developed to detect the hydrolyzed amino acids and free amino acids in grape seeds with phenyl isothiocyanate(PITC) as the derivative reagent. For chromatographic analysis, a Thermo AcclaimTM 120 C18 column (250 mm × 4.6 mm, 5 μm) was used. The mobile phase consisted of solvent A and B with the flow rate of 1.0 mL/min by gradient elution. Solvent A was sodium acetate buffer solution (pH 6.5) and solvent B was methanol-acetonitrile-water (20∶60∶20, v/v/v). The temperature of column was maintained at 30 ℃. The wavelength was set at 254 nm. The results showed …

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Highly Sensitive Detection Of Bisphenol A Based On Fret From Up-Conversion Nanoparticles To Gold Nanoparticles, Xu Zhou, Lu Shizhen, Chen Maolong, Zhu Yingyue, Ding Li, Cheng Yunhui Sep 2018

Highly Sensitive Detection Of Bisphenol A Based On Fret From Up-Conversion Nanoparticles To Gold Nanoparticles, Xu Zhou, Lu Shizhen, Chen Maolong, Zhu Yingyue, Ding Li, Cheng Yunhui

Food and Machinery

The 13 nm gold nanoparticles were synthesized and were modified with Bisphenol A(BPA) aptamer. The oil-solubility Up-conversion nanoparticles (UCNPs) were modified with polyacrylic acid (PAA) to form water-solubility UCNPs. Then water-solubility UCNPs were coated with the complementary DNA strand. Based these nanoparticles, a FRET aptasensor for BPA was successfully fabricated by using Up-conversion nanoparticles as energy donor and gold nanoparticles as energy acceptor. The results show that the detection system has a good linear relationship at 1×10-9～1×10-3 mol/L (R2=0.992 3), and the detection limit is as low as 1×10-10 mol/L. The method is proved …

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Simultaneously Determination Of Nine Kinds Of Pesticide Residues In Dark Tea By Gas Chromatography-Tandem Mass Spectrometry（Gc-Ms/Ms）, Cheng Shuilian, He Jianguo, Huang Jing, Lu Guiying Sep 2018

Simultaneously Determination Of Nine Kinds Of Pesticide Residues In Dark Tea By Gas Chromatography-Tandem Mass Spectrometry（Gc-Ms/Ms）, Cheng Shuilian, He Jianguo, Huang Jing, Lu Guiying

Food and Machinery

Developed a qualitative and quantitative analysis method which simultaneously determined nine kinds of pesticide residues in dark tea by gas chromatography in combination with triple quadrupole mass spectrometry. After being extracted by acetonitrile and purified by Cleanert TPT solid-phase extraction column,they were analyzed by GC-triple quadrupole MS.The results showed that the calibration cure for nine kinds of pesticide was the linear in the range of 0.4～3.2 mg/L and peak area,each correlation coefficient is above 0.99,and the relative standard deviation(RSD) was between 1.5% and 5.6%. At the same time, the average recovery was ranged from 81.6% to 98.6%,and the determining limits …

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Analysis And Assessment Of Two Kinds Of High Performance Liquid Chromatography Methods To Detect Xylitol, Sorbitol And Maltitol In Foods, Xiang Jun, Wang Fangbin, Jing Huihua, Tang Wanli, Liu Sai Sep 2018

Analysis And Assessment Of Two Kinds Of High Performance Liquid Chromatography Methods To Detect Xylitol, Sorbitol And Maltitol In Foods, Xiang Jun, Wang Fangbin, Jing Huihua, Tang Wanli, Liu Sai

Food and Machinery

Two different methods for the determination of three kinds of sugar alcohols in bubble gum and beverage were analyzed and compared. Samples were extracted directly by water. Half part of the extracts was detected by high performance liquid chromatography with differential refractive index detection (HPLC-DRID), the rest part of the extracts was detected by high performance liquid chromatography with evaporative light-scattering detection (HPLC-ELSD). Limits of detection (LOD) of xylitol, sorbitol and maltitol determined by HPLC-DRID were 0.037 5 g/100 g, the correlation coefficients were in the range of 0.999 21～0.999 29, and the recovery rates of spiked samples were in …

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Quick Determination Of Chemical Constituents In Prunus Cerasifera Leave By Uplc-Uv-Qda, Liu Wei, Liu Tianqi, Ge Yuwei, Ouyang Yan Sep 2018

Quick Determination Of Chemical Constituents In Prunus Cerasifera Leave By Uplc-Uv-Qda, Liu Wei, Liu Tianqi, Ge Yuwei, Ouyang Yan

Food and Machinery

UPLC-UV-QDa technique, combined with the acidic hydrolysis experiment were applied to quantitative and qualitative analysis flavonoid aglycones and methanol extracts from leaves of four different kinds of Prunus cerasifera. The result showed that quercetin and kaempferol were well separated in 7.0 minutes and had good linear relationship, the average recoveries of two flavonoid aglycones were 98.65% and 102.02% with RSD 1.08%(n=3) and 1.17%(n=3), the method was proved to be fast, accurate and repeatable. There was some difference in the content of flavonoid aglycone from different kinds of Prunus cerasifera in different environment, two flavonoid aglycones were found in all kinds …

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Research On Food Safety Traceability System Based On Iot And Blockchain Technology, Zeng Xiaoqing, Peng Yue, Wang Qi Sep 2018

Research On Food Safety Traceability System Based On Iot And Blockchain Technology, Zeng Xiaoqing, Peng Yue, Wang Qi

Food and Machinery

According to the shortcomings of current food traceability system on account of inconsistency in technological standards, non-transparency in information, liability to be tampered, serious centralization and information islands, this paper explores the key standards and technologies of food traceability, establishes a traceability system structure and designs a food traceability process based on Internet of Things and blockchain. By adopting the alliance blockchain model and the Hyperledger development platform, implemented a traceability prototype system. It fully demonstrates that our technological solution can significantly improve efficiency and transparency of the food supply chain, which will obviously enhance the food safety and rebuild …

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Design And Implementation Of A New Sandwich Making And Selling Machine, Zhou Yusong, Hua Liang Sep 2018

Design And Implementation Of A New Sandwich Making And Selling Machine, Zhou Yusong, Hua Liang

Food and Machinery

In view of the blank current situation of automatic sandwich making and selling equipment in the market, a new sandwich making and selling machine is developed. The design and manufacture of the whole new mechanical machinery body, vegetable throwing device, and loaf pushing device, etc. have been completed. The prototype has been tested and run. The functions of personalized meal selection, scavenging payment, cash payment, heating and cooling and disinfection, multi station feeding synergy, network monitoring and management are realized.

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Effect Of Co2 Method On Monitoring Mildew Of Stored Grain In Warehouse And Its Main Influencing Factors, Bei Jingjing, Zhai Huanchen, Zhang Shuaibing, Lu Yangyong, Cai Jingping Sep 2018

Effect Of Co2 Method On Monitoring Mildew Of Stored Grain In Warehouse And Its Main Influencing Factors, Bei Jingjing, Zhai Huanchen, Zhang Shuaibing, Lu Yangyong, Cai Jingping

Food and Machinery

The mildew of stored grain will affect the safety of food，which can be monitored by the method of detecting the change of carbon dioxide (CO2) concentration in grain bulk. As an indirect method, it is necessary to analyze comprehensively the related factors of grain bulk and the parameters of CO2 sensor, which cansignificantly affect the detection value. The results showed that the mould count in the initial stage of the stored grain fungi growth was synchronized with the change of CO2 concentration at different temperatures, and the correlation coefficient was greater than 0.99. CO2 production …

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Study On Coating Preservation Of Litsea Cubeba Essential Oil And Chitosan On Kumquat, Peng Xianglian, Fu Hongjun, Fan Li Sep 2018

Study On Coating Preservation Of Litsea Cubeba Essential Oil And Chitosan On Kumquat, Peng Xianglian, Fu Hongjun, Fan Li

Food and Machinery

In order to prolong the shelf life of kumquat, kumquat fruits were treated with coating preservation of litsea cubeba essential oil and chitosan, then stored at room temperature conditions, the changes of weight-loss rate, soluble solids, titratable acid, vitamin C(VC), total sugar, sensory index in fruits during storage were investigated. The results showed that the composite coating of Litsea cubeba essential oil and chitosan inhibited the weight-loss of the kumquat, soluble solids, titratable acid, VC, total sugar and sensory of the treated group were better than the control group. The weight-loss rate, soluble solids, and V …

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Algorithm On Apple Defect Detection Based On Visible Light-Infrared Light Image Fusion, Chen Qianhui, Wu Degang Sep 2018

Algorithm On Apple Defect Detection Based On Visible Light-Infrared Light Image Fusion, Chen Qianhui, Wu Degang

Food and Machinery

Aiming at the shortcomings of traditional apple defect detection methods such as high labor intensity, low productivity and high false positive rate,the apple defect detection algorithm is proposed based on visible light-infrared light image fusion. The algorithm uses different fusion methods for high and low frequency wavelet coefficients of visible and infrared images to obtain more prominent feature images. The results of simulations show that the recognition rate can reach 96% in the detection of apple fruit with scratches, bumps, fruit stems/flower buds and intact fruits, in addition, the recognition accuracy rate for scratches can reach 92%, and in the …

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Quality Evaluation Of Different Table Grape Based On Principal Component Analysis, Pan Zhao, Zhou Wenhua, Xiao Yuehuizi Sep 2018

Quality Evaluation Of Different Table Grape Based On Principal Component Analysis, Pan Zhao, Zhou Wenhua, Xiao Yuehuizi

Food and Machinery

The study was to accurately evaluate the quality of table grape,18 different varieties of table grapes were selected. 14 basic quality indicators were measured and analyzed by sensory scores and correlation analysis. Principal component analysis was employed to build a composite score mathematical model. The results showed that there was a significant difference in the quality indexes among different grape varieties, among them, hardness difference was largest (coefficient of variation is 51.18%). Correlation analysis showed that there was an independence and a certain degree of correlation between indicators. Principal component analysis was extracted from 4 principal component factors, and cumulative …

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Effects Of Maillard-Type Glycosylation On Antioxidant Activity Of Corn Protein Hydrolysates, Liu Xiang, Zheng Xiqun, Liu Xiaolan Sep 2018

Effects Of Maillard-Type Glycosylation On Antioxidant Activity Of Corn Protein Hydrolysates, Liu Xiang, Zheng Xiqun, Liu Xiaolan

Food and Machinery

Protamex and alcalase were synergistically used for hyolorlysis of corn protein and the hydrolysates were glycosylated with oligochitosan by Maillard reaction. The antioxidant activities of corn protein hydrolysates (prepared under different protein/enzyme rattios) and glycosylation products were studied. The resultsshowed that both of the enzymatic hydrolysates and glycosylation products had good antioxidant activity, and-the Maillard glycosylation reaction could improve the antioxidant activity of corn hydrolysates. When the protein concentration of glycosylation products was 5 mg/mL, clearance rate of·OH and DPPH· reached to 90.91% and 90.91%, respectively,which increased 48.78% and 32.26%, compared to non-glycosylated hydrolysates.Similarly,when the protein concentration of glycosylation products …

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The Extraction Process Of Polyphenols From Porphyra Haitanensis And Their Antioxidant And Antimicrobial Activities In Vitro, Chen Hongbin, Song Lulu, Jin Jinxuan, Cheng Yongqiang Sep 2018

The Extraction Process Of Polyphenols From Porphyra Haitanensis And Their Antioxidant And Antimicrobial Activities In Vitro, Chen Hongbin, Song Lulu, Jin Jinxuan, Cheng Yongqiang

Food and Machinery

The Optimization of the extraction of polyphenols from Porphyra haitanensis and their antioxidant and antimicrobial activities in vitro were studied. The effects of liquid-material ratio, ultrasonic times and ethanol concentration on the contents of polyphenols from P. haitanensis were investigated. Moreover, the response surface analysis method was applied to determine the optimization of the extraction. The results showed that the optimum condition for the ultrasonic-assisted extraction of polyphenols was as follows: liquid-material ratio 35∶1 (mL/g), ultrasonic times 43 min and ethanol concentration 66%. Under the optimum condition, the contents of polyphenols was (6.85±0.13) mg GAE/g. The research of their antioxidant …

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Extraction And Antioxidant Activities Of Flavonoids From Coreopsis Tinctoria Nutt Tea, Wang Jiani, Ming Jian, Tian Yong, Wang Rongjie, Li Fuxiang Sep 2018

Extraction And Antioxidant Activities Of Flavonoids From Coreopsis Tinctoria Nutt Tea, Wang Jiani, Ming Jian, Tian Yong, Wang Rongjie, Li Fuxiang

Food and Machinery

The optimization of the flavonoids extraction technique of Coreopsis tinctoria Nutt tea and the vitro antioxidant activity of flavonoids was studied by taking the Coreopsis tinctoria Nutt tea as the raw material, and basing the single factor experiment and Box-Behnken methodology. Results:The optimal extraction conditions of flavonoids from Coreopsis tinctoria Nutt tea were: extraction time 13 min, extraction temperature 98 ℃, the ratio of solid to liquid 1∶78 (g/mL). Under the conditions, the flavonoids extraction rate was (20.39±0.07)%. The half inhibiting concentrations (IC50) to FRAP and DPPH free radical scavenging were (137.98±1.56) μg/mL and (82.40±1.98) μg/mL, respectively. The …

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Study On The Bioactive Ingredients And Antioxidant Activities Of 6 Kinds Of Edible Flowers, Zhang Dongfeng, Liu Qi, Zhang Xinyue, Zhang Jiaqi, Fu Xinjing, Lu Jun Sep 2018

Study On The Bioactive Ingredients And Antioxidant Activities Of 6 Kinds Of Edible Flowers, Zhang Dongfeng, Liu Qi, Zhang Xinyue, Zhang Jiaqi, Fu Xinjing, Lu Jun

Food and Machinery

In this study, the bioactive compounds of 6 common edible flowers were extracted by ultrasonic extraction method and their antioxidant activities were assessed. The content of flower active ingredients such as polyphenols, flavonoids, anthocyanins and carotenoids were determined by ultraviolet spectrophotometry and HPLC. The content of these active compounds range from 6.20～63.17 mg GAE/g ·DW, 12.52～180.47 CE /g· DW, 4.17～40.91 mg CyA/g· DW and 0.33～0.68 mg/g ·DW, respectively. The antioxidant activities were assessed by DPPH, FRAP and ABTS assays, range from 45.13～1 092.49, 100.20～2 621.25 and 100.12～1 708.03 μmol TE/g DW respectively.

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Research Progress Of The Detection Mechanism Of Luminescent Bacterial Toxicity And Its Application, Hu Xinying, He Zhifei, Li Hongjun Sep 2018

Research Progress Of The Detection Mechanism Of Luminescent Bacterial Toxicity And Its Application, Hu Xinying, He Zhifei, Li Hongjun

Food and Machinery

The paper describes the luminescent bacteria and the mechanism of detecting toxic and harmful substances. This paper reviews the recent advances in the application of luminescent bacteria in toxicity assessment and food safety testing. What’s more, the factors influencing the application of luminescent bacteria in food safety testing are pointed out, and the paper indicates the application research direction in this technical field.

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Research Progress Of Specific Spoilage Organisms Quorum Sensing And Plant-Source Inhibitors In Aquatic Products, Lan Weiqing, Wang Meng, Chen Mengling, Xie Jing Sep 2018

Research Progress Of Specific Spoilage Organisms Quorum Sensing And Plant-Source Inhibitors In Aquatic Products, Lan Weiqing, Wang Meng, Chen Mengling, Xie Jing

Food and Machinery

The spoilage of aquatic products is mainly caused by microbial activities. In this paper, the Specific Spoilage Organisms (SSO) in aquatic products, Quorum Sensing (QS) signal of microbial molecules, the resource and function methods of QS inhibitors were described, respectively. The existing problems and solutions of current QS inhibitors from plant were proposed as well so as to provide the theoretical reference for the research of preservatives for controlling the QS in aquatic products.

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Sources And Effects Of Trace Components In Traditional Chinese Liquor, Cao Zhihua, Yu Yougui, He Hongmei Sep 2018

Sources And Effects Of Trace Components In Traditional Chinese Liquor, Cao Zhihua, Yu Yougui, He Hongmei

Food and Machinery

Based on the new achievements in the study of the trace components of traditional Chinese liquor, its sources and effects were systematically summarized for the first time. The main sources are three ways: catalytic reactions of microorganisms and enzymes during fermentation, chemical changes during storage, and chemical reactions of special components from raw materials, and which mainly playes three roles: the aroma and flavor-producing, style and aroma type-forming and physiological functions. In the future, the research focuses on the impact of raw materials on the trace components of traditional Chinese liquor, the construction and application of gene bacteria of high-yielding …

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Advances On Extraction And Function Of Anoectochilus Roxburghii Polysaccharide, Chen Chengli, Dong Quan, Zhou Yu, Yan Min Sep 2018

Advances On Extraction And Function Of Anoectochilus Roxburghii Polysaccharide, Chen Chengli, Dong Quan, Zhou Yu, Yan Min

Food and Machinery

Anoectochilus roxburghii polysaccharide (ARP) is a kind of bioactive substance, consisting of monosaccharides polymerized by glycoside bonds. It is extracted from Anoectochilus roxburghii and has effective functions to decrease blood sugar and blood fat, and to protect liver and kidney. It also has excellent effects on sleep promotion, anti-tumor, and immunity enhancement. Based on the research of ARP in recent years, this article reviewes the extraction methods of ARP and mechanism of its biological activity, briefly analyzes the characteristic of its structure, and summarizes the differences in the content of different sources of ARP and the application of ARP in …

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Effect Of Drying Methods On Quality And Antioxidant Properties Of Apricot Powder, Zhao Hongxia, Wang Yingqiang, Wen Jianhua, Wen Wen, Mao Yaqian, Song Wenli Sep 2018

Effect Of Drying Methods On Quality And Antioxidant Properties Of Apricot Powder, Zhao Hongxia, Wang Yingqiang, Wen Jianhua, Wen Wen, Mao Yaqian, Song Wenli

Food and Machinery

The natural apricot powder was prepared by microwave drying (MD), hot air drying (HAD), microwave vacuum drying (MVD) and microwave convection drying (MCD) and their nutritional, physical, sensory and antioxidant propertieswere compared. Significant differences among the determined quality terms of the four products were observed（P＜0.05）, the MVD and MCD products had the higher total sugar and reducing sugarand the latter had the least loss in total phenol and VC content while the HAD product the best retention of total acid, the apricot meat powder prepared by MD had the lowest hygroscopicity and caking degree. The apricot meat powder prepared …

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Optimization Of Fermentation Technology And The Activities Of Quinoa, Han Lin, Yang Renyi, Hu Yue, Jiang Wei Sep 2018

Optimization Of Fermentation Technology And The Activities Of Quinoa, Han Lin, Yang Renyi, Hu Yue, Jiang Wei

Food and Machinery

In order to enhance the nutritive value and functional activity of quinoa, response surface methodology was employed to optimize the fermentation technology based on the single factor experiment to increase the total phenols. Moreover, the antioxidant and α-glucosidase inhibiting activity of quinoa were compared. The results showed that the optimal fermentation conditions were as follow: yeast 1.7%, fermentation time 80 h, moisture content 16 mL, and the average content of total phenols from fermented quinoa was reached to (5.31±0.11) mg/g under these conditions, which was close to the predicted value with the relative error is only 1.12%. Moreover, compared to …

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Effects Of Different Thickeners On The Quality Of Freeze-Dried Pleurotus Eryngii Powder, Wang Haiou, Gao Yingyu, Chen Shoujiang, Fu Qingquan, Zhang Wei, Wang Rongrong, Hua Chun Sep 2018

Effects Of Different Thickeners On The Quality Of Freeze-Dried Pleurotus Eryngii Powder, Wang Haiou, Gao Yingyu, Chen Shoujiang, Fu Qingquan, Zhang Wei, Wang Rongrong, Hua Chun

Food and Machinery

Effects of the addition amount of different thickeners (maltodextrin, xanthan gum, sodium carboxymethyl cellulose) on the quality of freeze-dried Pleurotus eryngii powder were studied by investigating the indexes of bulk density, hygroscopicity and instant solubility. In order to obtain a better product quality, the best combination of thickeners was optimized by single factor, orthogonal experiment and comprehensive analysis method. The results showed that adding three thickeners alone can improve the quality of freeze-dried Pleurotus eryngii powder. The effect of maltodextrin was the most significant, followed by xanthan gum and sodium carboxymethyl cellulose. The best combination was maltodextrin 15%, xanthan gum …

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Study On Optimization Of Preparation Of Activated Carbons From Suaeda Salsa And Its Adsorption Activity, Fu Jianxin, Zhang Bingwen, Zhang Guixiang Sep 2018

Study On Optimization Of Preparation Of Activated Carbons From Suaeda Salsa And Its Adsorption Activity, Fu Jianxin, Zhang Bingwen, Zhang Guixiang

Food and Machinery

With the activated carbon iodine adsorption and yield as the optimization index, the process of Suaeda sasla carbon taking H3PO4-ZnCl2 as the dual activator was studied. The single-factor test was used to examine the effect of mass fraction of H3PO4-ZnCl2, activation temperature, and the activation time on activated carbon preparation. The optimum conditions for the preparation of S. sasla based activated carbon by orthogonal experiments were as follows: H3PO4-ZnCl2 mass fraction 30%, activation temperature 500 ℃, activation time 80 min. Under these conditions, the …

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Screening And Expression Identification Of Staphylococcus Aureus-Inhibiting Peptide Genes From Lactic Acid Bacteria, Ren Dayong, Zhu Jianwei, Liu Hongyan, Yu Hansong Sep 2018

Screening And Expression Identification Of Staphylococcus Aureus-Inhibiting Peptide Genes From Lactic Acid Bacteria, Ren Dayong, Zhu Jianwei, Liu Hongyan, Yu Hansong

Food and Machinery

The 7 strains with antimicrobial activity were screened as samples and verification by PCR amplification has antimicrobial peptide genes of PlnF, PlnE, PlnN, PlnJ, and PlnK. Then designed a primer to introduce Nco I and Xho I sites into both ends of the antibacterial peptide genes with the treated of pET28a plasmid to obtain recombinant plasmid using T4 ligase, and the pET28a-peptide was transformed into E.coli BL21(DE3). The experiment results showed that the inhibition zone of the pET28a-peptide was the PlnF, after 0.5 mmol/L IPTG inducted for 6 h after the OD600=0.6 of the E.coli LB. The cell …

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Study On The Drying Kinetics Of Longan With Intermittent Vacuum-Microwave, An Kejing, Xiao Gengsheng, Wei Lai, Yu Yuanshan, Tang Daobang, Wen Jing, Lin Xian Sep 2018

Study On The Drying Kinetics Of Longan With Intermittent Vacuum-Microwave, An Kejing, Xiao Gengsheng, Wei Lai, Yu Yuanshan, Tang Daobang, Wen Jing, Lin Xian

Food and Machinery

Aiming at the problem of uneven heating of longan, excessive microwave drying rate and local over-focus, the vacuum microwave drying was carried out by the combination of intermittent microwave and variable power microwave. In this paper,the changes of water ratio and drying rate in the vacuum microwave drying process were analyzed, such as the power density, vacuum degree and loading quantity. Seven thin layer fitting models were tested. The orthogonal experiment of three factors and three levels for color, total phenolic content and rehydration evaluation was established. The optimum intermittent vacuum microwave drying process of longan was optimized. The results …

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Cfd Simulation Analysis And Experimental Verification Of Twin Screw Compressor, Long Ji, He Xueming, Jiang Zhengang Sep 2018

Cfd Simulation Analysis And Experimental Verification Of Twin Screw Compressor, Long Ji, He Xueming, Jiang Zhengang

Food and Machinery

In view of the complex and time changing characteristics of the fluid domain in the twin screw compressor, and in order to study it’s performance characteristics in detail, used STAR CCM＋software to do the computational fluid dynamics (CFD) analysis, and the experimental platform was built to verify the accuracy of the simulation results. By comparing the pressure values of the simulated monitoring points and the experimental measured points corresponding to them, both of them have good consistency in the pressure value and the period of pressure fluctuation.

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Improvement Of Transmission Shaft Connecting Ch And Cv In Gdx2 Packer, Wang Guangsheng, Wang Wenhui, Cao Xingqiang, Wang Zhongqing, Yang Guanglu Sep 2018

Improvement Of Transmission Shaft Connecting Ch And Cv In Gdx2 Packer, Wang Guangsheng, Wang Wenhui, Cao Xingqiang, Wang Zhongqing, Yang Guanglu

Food and Machinery

The transmission shaft connecting CH and CV in GDX2 packer always breaks down due to attrition. Its integrated design and small repair space make it time-and-energy consuming to replace the damaged transmission shaft, which inspires us to improve itsuniversal joints. Based on its original transmission principle, we substitute the fast respectively demountable units for the transmission gear, which made the installment more efficient. While repairing, only the broken units needed to be beplaced. The application result showed that the improved universal joints function reliably, with less labors, and greatly increased the effective operation rate because of its simple structure.

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Design Of A Domestic Small Solar Composting Box, Yu Peibin, Chen Jianxin, Li Yanwu Sep 2018

Design Of A Domestic Small Solar Composting Box, Yu Peibin, Chen Jianxin, Li Yanwu

Food and Machinery

In view of the current market common kitchen waste composting box is not easy to keep warm, the composting time is long, the effect of drainage is poor, the odor is heavy and so on. A small household composting box is designed and its spatial structure is designed and optimized. The device includes several modules, such as solar collector, solar panel, ventilator, feeding port, leachate screen, tail gas treatment and so on. It can better meet the requirements of high temperature aerobic composting process. It uses solar energy for the whole system of heat preservation, ventilation and energy supply, reducing …

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Optimization Of Polysaccharides Extractedand Analysis From Zingiber Officinale Rosc, Liao Dengwei, Huang Dechun, Cheng Shujie, Cao Chongjiang, Chen Guitang Sep 2018

Optimization Of Polysaccharides Extractedand Analysis From Zingiber Officinale Rosc, Liao Dengwei, Huang Dechun, Cheng Shujie, Cao Chongjiang, Chen Guitang

Food and Machinery

The polysaccharides from Zingiber officinale Rosc were extracted by hot water extraction method, ultrasonic ice bath extraction method and complex enzymatic hydrolysis method. The effects of different methods on the extraction were investigated by the UV spectra image and the scanning electron microscope image of ginger residue. The results showed that the polysaccharides extraction rates of the three different extraction processes under optimal extraction conditions were (11.74±0.23)%, (7.00±0.04)%, and (20.93±0.20)%, and the yields were (6.53±0.08)%, (2.56±0.11)%, and (14.67±0.32)%, the purity was (86.53±0.20)%, (59.84±0.06)%, and (73.59±0.19)%. Comparing with three different methods, the enzymatic hydrolysis method had the highest extraction rate and …

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Ultrasonic-Assisted Extraction Essential Oil Of Lemon And Chemical Composition Analysis, Xiao Juan, Zhou Kang, Hu Bin, Su Zhao Sep 2018

Ultrasonic-Assisted Extraction Essential Oil Of Lemon And Chemical Composition Analysis, Xiao Juan, Zhou Kang, Hu Bin, Su Zhao

Food and Machinery

Ultrasonic-assisted hydrodistillation extraction (UAHE) essential oil from lemon peel was investigated. On the basis of single-factor test, response surface methodology was applied to optimize the parameters of extraction, including ultrasonic power, solvent to material ratio, ultrasonic time, and distilling time on the yield of essential oil. Meanwhile, the volatile composition was analyzed by GC-MS. In addition, the microscopic structures of material before and after various extraction methods are observed to clarify extraction mechanisms. The optimal extraction conditions were ultrasonic power of 320 W, solvent to material ratio of 15.5∶1 (mL/g), ultrasonic time of 36 min, distillation time of 140 min. …

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