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Articles 4201 - 4230 of 4816
Full-Text Articles in Life Sciences
Study On Oxidation Degradation Products Of Linoleic Acid, Wang Jianhui, Wang Xiu, Chen Qi, Wang Faxiang, Li Xianghong, Yu Jian, Liu Yongle
Study On Oxidation Degradation Products Of Linoleic Acid, Wang Jianhui, Wang Xiu, Chen Qi, Wang Faxiang, Li Xianghong, Yu Jian, Liu Yongle
Food and Machinery
GC—MS was applied to identify the acceleration of oxidative products formed from linoleic acid stored at 60 ℃. Both volatile and non-volatile oxidates were focus on in the present study. The results showed that the oxidative products formed in the primary oxidation stage were continuously oxidized into volatiles (such as aldehydes, ketones, alcohols, furan, etc.) during the course of accelerated oxidation. The relative contents of Hexanal, (E)-2-Heptena, (E)-2-Nonena, (E)-3-Nonene-2-one, 2-pentyl Furan changed obviously before 12 h and they could be used as evaluation indices of the primary autoxidation of linoleic acid. However, the relative contents of (E, E)-2, 4-Nonadienal, (E, …
Study On Functional Properties Of Camelina Sativa Gum, Li Zezhen, Chen Min
Study On Functional Properties Of Camelina Sativa Gum, Li Zezhen, Chen Min
Food and Machinery
The viscosity, foaming properties, emulsifying capabilitiy and synergetic action of Camelina sativa gum were studied by comparison to other gums. The results showed Camelina sativa gum solution in low concentration exhibited high apparent viscosity and good emulsifying and foaming properties. The viscosity of the compound gum increased sharply and the optimum ratio was 5∶5 of Camelina sativa gum to xanthan gum, and 9∶1 of Camelina sativa gum to guar gum. Camelina sativa gum improved the shear resistance and it could be well co-opperated with other gums. Meanwhile, the additive Camelina sativa gum had good properties.
Apreliminary Inquiry Into Causes Of Dark Spots In Egg Shell, Zhang Mingrong, Ye Jinsong, Li Xinyang, Zhang Zili, Han Jingjing, Wang Yuhan
Apreliminary Inquiry Into Causes Of Dark Spots In Egg Shell, Zhang Mingrong, Ye Jinsong, Li Xinyang, Zhang Zili, Han Jingjing, Wang Yuhan
Food and Machinery
In order to preliminarily explore the causes of eggshell dark spots, the thickness, hardness, moisture and protein content of calcareous hard eggshell, and the thickness and protein content of shell membrane were measured in the normal eggshell and dark spots portion as well as no spots portion of dark spots eggshell, and the ultra structure was also studied results: The hardness of calcareous hard eggshell of dark spots eggshell was minimum, and its water content was maximum, which were highly significant (P<0.01) compared with other groups; However, there with no difference between spots group and the normal group. The thickness of calcareous hard shell was similar among the three groups, while that of shell membrane was highly significant (P < 0.05). In addition, protein content of calcareous hard shell of three groups had no significant difference (P > 0.05), while that of shell membrane of dark spots egg was much lower than the normal egg (P < 0.01). The result of scanning electron microscope showed that both the calcareous hard shell and shell membrane of dark spots group had more significant loose texture and porosity features than other groups. In conclusion, the formation of dark spots was mainly due to that the shell membrane under eggshell dark spots was thin with large mesh, resulting in moisture of the egg permeated through the shell membrane into the calcareous hard shell easily, and then the moisture was absorbed by calcareous hard shell, resulting in the formation of dark spots gradually.
Nondestructive Detection Of Internal Quality Of Loquat By Near Infrared Spectroscopy, Wang Xi, Wu Xiyu, Pang Lan, Xu Dan
Nondestructive Detection Of Internal Quality Of Loquat By Near Infrared Spectroscopy, Wang Xi, Wu Xiyu, Pang Lan, Xu Dan
Food and Machinery
Spectra data of the 101 loquat samples were obtained by using NIRS and the TSS, titratable acid, Vc of the samples were determined by conventional chemical methods. The mathematical pretreatment methods were used as spectral preprocessing options, and then the calibration models of TSS, titratable acid and Vc were established respectively by PLS. By using these models, the TSS, titratable acid and Vc in the validation sets can be predicted. The Rp2 are 0.906, 0.745, 0.554, RMSEP are 0.628, 0.048, 2.23 respectively, and the RPD of TSS is 3.31. Thus, the calibration model of TSS can be used for the …
Design Of A New-Type Continuous Stack-Up Juice Press And Proof On Experimental Machine, Ma Songbai, Zhang Shaoying, Wang Jing
Design Of A New-Type Continuous Stack-Up Juice Press And Proof On Experimental Machine, Ma Songbai, Zhang Shaoying, Wang Jing
Food and Machinery
Based on the analysis on demands of fruit-vegetable juice processing, and advantages and disadvantages of some typical industrial press machines, the technical solution of a new-type continuous stack-up juice press was presented. The mechanical structure and working principle of the juice press were illustrated in details. Besides that, based on the basic filter-press unit, an experimental machine was created to proof this technological solution. And then experiments with pressing Ralls apples juice were done in the experimental machine. The experimental results show that when the driving motor rotates around 600 r/min, the juice yield rate is 81.16%, and the average …
Empty Bottle Inspection Method To Realize Image Acquisition Technology Based On Computer Vision, He Xiaohu
Empty Bottle Inspection Method To Realize Image Acquisition Technology Based On Computer Vision, He Xiaohu
Food and Machinery
According to the shortcomings of traditional detection system of slow speed and low efficiency, demonstrated the feasibility based on the computer vision of empty beer bottle detection image acquisition technology, and discussed the methods of image acquisition technology to achieve, discussed the basic technical route of system, established the system framework, and analyzed the main problems need to be solved in the research. To overcome the disadvantages of manual detection and improve the efficiency of empty bottle detection, it plays a great role.
Improvement Of Pressing Device In Ch Wrapper, Deng Yongxiang, Li Gaojun
Improvement Of Pressing Device In Ch Wrapper, Deng Yongxiang, Li Gaojun
Food and Machinery
The cigarette packet under the pressing device of the CH wrapper is easy to be friction scratch by conveying belt, when the equipment is stopped. In order to solve this problems, the pressing device was improved as following： ①between the hinge and support are connected by threads into elastic connection; ② when the CH wrapper is stopped, the pressing device is a cylinder lifting left the cigarette packets without pressure of the cigarette package. The results of application showed that the new device can guarantee the normal operation of equipment, and effectively solves the cigarette packets and conveyor belt friction …
Study On Composition And Antioxidant Activity Of Amino Acids In Pickled Tofu Oligopeptides, Tang Jie
Study On Composition And Antioxidant Activity Of Amino Acids In Pickled Tofu Oligopeptides, Tang Jie
Food and Machinery
By water soluble preparation of oligo peptide of fermented bean curd, physico-chemical analysis and amino acid composition analysis, through and ascorbic acid comparison ·OH, DPPH·, O-2· free radical scavenging capacity, evaluation of fermented bean curd oligopeptides antioxidant activity of the oligopeptides. The results showed that the total protein content of fermented bean curd oligopeptides 85.47%. The amino acid composition of the rich, rich in antioxidant amino acids must amino acid content of 34.43%, with the total amino acid content of antioxidant activity was 30.5%; antioxidation experiment results show, fermented bean curd oligopeptides with free radical scavenging capacity and …
Research Progress In Immune Regulation Of Food-Derived Bioactive Peptides, Chen Yuehua, Cheng Yunhui, Xu Zhou, Wen Li
Research Progress In Immune Regulation Of Food-Derived Bioactive Peptides, Chen Yuehua, Cheng Yunhui, Xu Zhou, Wen Li
Food and Machinery
Food derived bioactive peptides are a series of specific functional hydrolysates of food proteins with relatively small molecular weight, containing deferent number of amino acid residues. And food-derived immunoactive peptides are those bioactive ones that play important roles on antibacterial, anti-inflammatory, and immunoregulation. Thus it is significant to investigate them because of their wide distribution and high bioactivities. The recent research status and the immune functions of immunopeptides are summarized. Moreover, some methods of producing immunoactive peptides were also introduced. Finally it is prospected that the research tendency of the immunoregulatory mechanism of immune peptides and their advanced utilization.
Effects Of Barley Β-Glucan On Pasting And Rheological Properties Of Wheat Flour, Li Yuan, Zhou Huiming, Guo Xiaona, Zhu Kexue, Peng Wei
Effects Of Barley Β-Glucan On Pasting And Rheological Properties Of Wheat Flour, Li Yuan, Zhou Huiming, Guo Xiaona, Zhu Kexue, Peng Wei
Food and Machinery
In the present study, the influence was investigated from water extracted barley β-glucan (BBG) on the pasting and rheological properties of wheat flour. Results showed that the values of wet gluten content decreased with the addition ratio of BBG increased. The presence of BBG induced an increase of peak viscosity, trough viscosity, breakdown and peak viscosity, while the setback value showed a decreasing tendency. Compared with the control, with increasing of the water absorption of dough, the development time, the stability and the weakening value reduced. Lower modulus (G′, G″) and tan δ values were observed in dynamic viscoelasticity measurements.
Correlation Between Sensory Evaluation And Instrumental Analysis Of Kamabokos Texture, Wang Dan, Jiang Qixing, Xu Yanshun, Xia Wenshui, Wang Haiou
Correlation Between Sensory Evaluation And Instrumental Analysis Of Kamabokos Texture, Wang Dan, Jiang Qixing, Xu Yanshun, Xia Wenshui, Wang Haiou
Food and Machinery
Texture is a decisive factor in the quality of Kamabokos. In order to find an objective evaluation method of Kamabokos’ texture，the correlation was studied between sensory evaluation and TPA results by collecting different brands Kamabokos. 10 kinds of Kamabokos, which were most popular in market, were collected, evaluated by the sensory evaluation.Meanwhile, the profile analysis was made by TPA (Texture Profile Analysis). Then PCA (Principal component analysis) and correlation analysis of the determination results were studied. The results showed that there was correlation between the sensory evaluation and TPA analysis by texture analyzer. For further evaluation of Kamabokos, stepwise regression …
Effect Of Pressure Associated Medium Temperature Sterilization On Pa/Pe Packaging Materials, Cao Yanli, Tang Yali, Zhao Wei, Lu Lixin
Effect Of Pressure Associated Medium Temperature Sterilization On Pa/Pe Packaging Materials, Cao Yanli, Tang Yali, Zhao Wei, Lu Lixin
Food and Machinery
To study the effect of pressure associated medium temperature treatment on PA/PE materials packed with four kinds of food simulation, the food simulation were distilled water, olive oil, 3%（volume fraction） acetic acid and 15% （volume fraction）ethanol. The treatment pressure were 200 MPa, 400 MPa and 300 MPa, the initial temperature was 10 ℃, 30 ℃ and 50 ℃ respectively, and the holding time was 15min. Changes of material structure were observed by scanning electron microscope, the mechanical and barrier properties of PA/PE were obtained by tests, reasons of the properties changes were further verified by DSC analysis. The high pressure …
Comparative Analysis Of Essential Oil Components In Eureka Lemon Peel From Different Producing Areas By Gc—Ms, Tu Xunliang, Lv Xiulan, Li Yabo, Yang Shuting, Zhang Li
Comparative Analysis Of Essential Oil Components In Eureka Lemon Peel From Different Producing Areas By Gc—Ms, Tu Xunliang, Lv Xiulan, Li Yabo, Yang Shuting, Zhang Li
Food and Machinery
The essential oil components in the fresh peels of Eureka Lemon from three main producing regions (Sichuan, Yunnan and Guangdong) were extracted by steam distillation extraction and identified by gas chromatography-mass spectrometry (GC—MS). The results indicated that 47, 41 and 39 kinds of compounds were identified in the peels of C_EUR, D_EUR, Y_EUR, and occupied 98.47%, 98.74% and 97.64% of total peak areas, respectively. Three tested samples gave priority to with terpenes, alcohols and aldehydes compounds, but alcohols and aldehydes existed obvious difference. Among the contents of 20 common components was relatively higher, including D-Limonene, γ-Terpinene, α-Terpineol, Terpinen-4-ol and Citral. …
Mechanical Compression Of Wen 185 Walnut Shell, Li Yong, Zhang Hong, Wang Ping, Shen Liuyang, Gao Yuanzhou, Wu Xiaowei
Mechanical Compression Of Wen 185 Walnut Shell, Li Yong, Zhang Hong, Wang Ping, Shen Liuyang, Gao Yuanzhou, Wu Xiaowei
Food and Machinery
In order to improve the design and manufacture of walnut processing machinery, mechanical properties for compression of whole solid, hollow walnut were analyzed to learn shell breaking process in different loading direction, and reduce mechanical damage of walnut seed in breaking shell process. Hollow walnut which H2O contents (4%, 6%, 8% and 10%) were compression tested by microcomputer controlled mechanical through different loading rate (100, 200, 300 and 400 mm/min). Meanwhile, the force-deformation curves were analyzed and the rupture force, rupture energy, rupture power, and elastic modulus were performed to the basic characteristic quantity in significance. The results showed that: …
Risk Pre-Warning Of Deterioration In Finished Sauce With Microbial Contamination, Jiang Xuewei, Ye Jing, Zhou Shangting, Xu Yantao, Fu Yulin, Chen Sheng
Risk Pre-Warning Of Deterioration In Finished Sauce With Microbial Contamination, Jiang Xuewei, Ye Jing, Zhou Shangting, Xu Yantao, Fu Yulin, Chen Sheng
Food and Machinery
In order to achieve the purpose of the risk pre-warning about the deterioration occurring in the finished sauce with microbial contamination, 4 kinds of physicochemical indexes were compared and analyzed, including the content of reducing sugar, total acid, ammoniacal nitrogen and diacetyl. The results showed that the finished sauce deteriorated because of the contamination of salt-tolerance bacillus, and its physicochemical indexes changed significantly. The reducing sugar content decreased drastically and the content of total acid, ammoniacal nitrogen and diacetyl increased obviously. It can be judged that the sauce is deteriorated while the decreasing amplitude of reducing sugar content reach to …
Synthesis Of Long Chain Parabens Catalyzed By Solid Superacids And Determination Of Antimicrobial Activity, Hou Yanbing, Liang Xiaowei, Yan Rian, Ou Shiyi
Synthesis Of Long Chain Parabens Catalyzed By Solid Superacids And Determination Of Antimicrobial Activity, Hou Yanbing, Liang Xiaowei, Yan Rian, Ou Shiyi
Food and Machinery
Segregative and recyclable solid superacids SO2-4/TiO2 and SO2-4/Fe2O3 were prepared by the method of coprecipitation and wet impregnation, used as catalysts in the synthesis of undecylparaben and dodecylparaben. The MIC(minimal inhibitory concentration) of the ethylparaben, propylparaben, undecylparaben and dodecylparaben against Staphylococcus aureus, Bacillus subtilis, Listeria monocytogenes, Escherichia coli, Salmonella enteritidis, Saccharomyces cerevisiae,Trichoderma spp were determined. The synthesis conditions were optimized as follows: catalyst SO2-4/TiO2, ratio of alcohol and acid 6︰1, time 4.5 h, temperature 130～140 ℃, catalyst as 3.50% p-hydroxybenzoic acid, the yields were 55.29%, 57.02%. Second, catalyst SO2-4/Fe2O3, ratio of alcohol …
Rapid Detection Of Allura Red In Hard Candy Using Raman Scatter Spectroscopy, Chen Si, Guo Ping, Luo Pengjie, Wu Ruimei, Wang Wenjun, Fang Tian
Rapid Detection Of Allura Red In Hard Candy Using Raman Scatter Spectroscopy, Chen Si, Guo Ping, Luo Pengjie, Wu Ruimei, Wang Wenjun, Fang Tian
Food and Machinery
Raman spectroscopy was employed to detect the allura red in hard candy using portable raman spectrometer. After attributed and analyzed the raman peaks of allura red by density functional theory method and normal raman spectroscopy, six characteristic raman peaks were confirmed which were 1 222, 1 272, 1 330, 1 408, 1 500 and 1 580 cm-1, respectively. Then the standard curve was established under the characteristic raman peaks with 1 500 cm-1. The results indicated that the curve possessed a good linear relationship between 0.1～1.0 g/kg, the determination coefficient was 0.995, average recovery of allura …
Optimization On Determination Of Total Polyphenol Content In Sea Buckthorn Wine By Folin-Ciocalteu Colorimetric Method, Niu Guangcai, Yan Gongxin, Zhu Dan, Wei Wenyi, Li Shiyan, Liu Zhiming
Optimization On Determination Of Total Polyphenol Content In Sea Buckthorn Wine By Folin-Ciocalteu Colorimetric Method, Niu Guangcai, Yan Gongxin, Zhu Dan, Wei Wenyi, Li Shiyan, Liu Zhiming
Food and Machinery
Optimizeed the optimal conditions of Folin-Ciocalteucolorimetry, which was used to determine the total polyphenols content in sea buckthorn wine, and the sea buckthorn wine were investigated by orthogonal experiments combined with single factor experiments by using gallic acid as the standard. The results indicated that the total phenol contents of sea buckthorn wine could be well calculated according to their colorimetric absorption at 735 nm by applying Folin-Ciocalteu reagent 1.0 mL and 5 mL distilled water, 7.5%Na2CO3 3 mL, at 30 ℃ for colorimetric reaction, and there was a good linearity between content of phenol and absorbance in the …
Fast Determination Of Glyphosate And Aminomethyl Phosphonic Acid Residues In Tea By Quechers And Uplc/Ms/Ms, Cao Hui, Zheng Junke, Huang Liying, Sheng Huadong
Fast Determination Of Glyphosate And Aminomethyl Phosphonic Acid Residues In Tea By Quechers And Uplc/Ms/Ms, Cao Hui, Zheng Junke, Huang Liying, Sheng Huadong
Food and Machinery
A method was developed for determination of glyphosate and aminomethyl phosphonic acid residues in tea by QuEChERS and UPLC/MS/MS. The samples were extracted with water and cleaned up with dispersive-solid phase extraction. The target analytes were separated by CORTECSTM UPLC C18+ column with gradient elution using acetonitrile and 0.1% ammonium hydroxide solution as mobile phases. Negative electrospray ionization with multiple reaction monitoring mode was used in the detection. Internal standard method was used to determine the results. The linear ranges were 5 to 500 μg/L. The limit of detection (LOD) of this method were 10 μg/kg, and the limit …
Improvement Of Determination Method Of Total Flavonoids In Extract Of Ginkgo Biloba Leaves Of Capsules, Lei Aiqiu, Hua Yanglin, Sun Weizheng
Improvement Of Determination Method Of Total Flavonoids In Extract Of Ginkgo Biloba Leaves Of Capsules, Lei Aiqiu, Hua Yanglin, Sun Weizheng
Food and Machinery
Flavonoids are the pharmacologically important chemical groups. NaNO2-Al(NO3)3-NaOH colorimetry assay for determination of total flavonoids in health foods have some defects. In this work, contribution of six key flavonoids components of extract of Ginkgo biloba leaves to total flavonoids content in the NaNO2-Al(NO3)3-NaOH colorimetry assay were evaluated. Results showed that quercitin made the most contribution to total flavonoids content. Sample quantity, alcohol concentration of eluant, and ultrasonic times in this assay were evaluated. Alcohol concentration of eluant and ultrasonic times affected total flavonoids content in HZ Capsules. By …
Study On Recognition Model For Wild Mushroom Based On Support Vector Machine Of Near Infrared Spectral Diagnosis, Liu Yang, Wang Tao, Zuo Yueming
Study On Recognition Model For Wild Mushroom Based On Support Vector Machine Of Near Infrared Spectral Diagnosis, Liu Yang, Wang Tao, Zuo Yueming
Food and Machinery
A new method for discrimination of wild Mushroom by means of near infrared spectroscopy (NIRS) was established. Visible and near infrared reflectance spectra of 13 different types of mushroom including 3 wild mushrooms were collected with a portable near infrared spectrometer ( ASD Fieldspec3 ). Based on the analysis of spectrum, are the characteristics absorption peaks of polysaccharides, protein, fat of the mushroom are1 483, 1 727, 1 930, 2 100, 2 180, 2 310 nm, which of wild mushroom in are significantly higher than other mushrooms. With these 6 wavelengths of absorbance as input variables to establish recognition model …
Kinematics Simulation About Meshing Impact Performance Of A Planetary Gear Train, Li Tongjie, Wang Juan, Yao Zhihua, Yi Kechuan
Kinematics Simulation About Meshing Impact Performance Of A Planetary Gear Train, Li Tongjie, Wang Juan, Yao Zhihua, Yi Kechuan
Food and Machinery
Based on the nonlinear bending-torsional coupling vibration mode of a NGW Planetary Gear Train, the meshing impact performance of the planetary gaear train is studied by using Runge-Kutta direct numerical integration method and some influence rules were gotten on the parameters such as composite meshing error and Power. The study results reveal that there are two error thresholds, one is small and another is big. The impact phenomenon will not appear if the composite meshing error value is smaller than the small error threshold. The unilateral impact phenomenon will appear if error value is bigger than the small error threshold …
Simulation And Analysis Of Chili Flow Characteristics In Bending Filling Pipes, Zhou Peng, Yu Liya, He Ling, Yang Zhengtong
Simulation And Analysis Of Chili Flow Characteristics In Bending Filling Pipes, Zhou Peng, Yu Liya, He Ling, Yang Zhengtong
Food and Machinery
In order to optimize the design of chili's Filling pipeline, taking solid-liquid multiphase fluid of chili as the research content, 90° horizontal bend model as the research object, calculating the suitable turbulence critical speed for the chili filling pipeline, using the mixture model of multiphase flow, the distribution of velocity field and density field was analyzed with inlet flow rate as 5, 7, 9 m/s. The results show that it is easy to form stratification when the speed is less than the critical speed. Geometric bend has large influence on multiphase flow field. The length of straight pipe section between …
Modeling And Evaluating On Growth/No Growth Boundaries Of Bacillus Cereus On Soft-Baked Mussels, Qu Feixiang, Li Xueying, Yang Xianshi, Liu Zunlei
Modeling And Evaluating On Growth/No Growth Boundaries Of Bacillus Cereus On Soft-Baked Mussels, Qu Feixiang, Li Xueying, Yang Xianshi, Liu Zunlei
Food and Machinery
The growth/no growth interface model of Bacillus cereus (ATCC49064 and DSMZ 4312) on soft-baked mussels was established based on storage temperature (T), water activity (Aw) and pH, and its fitting and the validation behavior of Bacillus cereus (YB001) from soft-baked mussels were analyzed and evaluated. And this model was compared with the established growth/no growth interface model of Bacillus cereus in Brian Heart Infusion (BHI) media. The total equation of this model is Lopit(P)=-208.457-2.167·T+35.304·pH+705.573·Bw+1.117·T·pH-7.072·T·Bw-174.946·pH·Bw. It showed a reasonable goodness of fit of this model due to R2-Nagelkerke=0.979 and χ2=0.019(df=8, P=1), and the predicted concordance rate of …
Isolation And Identification Of Dominant Spoilage Bacteria From Fresh-Cut Lotus Root With Cold Storage, Liu Xiaofang, Wang Faxiang, Yu Jian, Shan Shiping, Guo Senlin, Liu Yongle
Isolation And Identification Of Dominant Spoilage Bacteria From Fresh-Cut Lotus Root With Cold Storage, Liu Xiaofang, Wang Faxiang, Yu Jian, Shan Shiping, Guo Senlin, Liu Yongle
Food and Machinery
Growth and reproduction of specific spoilage bacteria contribute significantly to the spoilage of fresh-cut fruits and vegetables. In this paper, the change regulation of total colony count of fresh-cut lotus root during cold storage period was firstly analyzed, then the spoilage bacteria were separated by dilution-plate method, and the dominant spoilage bacteria were identified using 16S ribosomal DNA based bacterial identification system. The results showed that when the fresh-cut lotus root was preserved at 4 ℃ for 8 days, and its total colony count increased to 4.17×105 CFU/g, which the early microbial spoilage was thought to be developed. Based …
Comparison Of Extraction Process Of Polysaccharide Of Auricularia Auricular, Zhao Yuhong, Lin Yang, Zhang Ligang, Zhang Zhi, Wang Zhenyu
Comparison Of Extraction Process Of Polysaccharide Of Auricularia Auricular, Zhao Yuhong, Lin Yang, Zhang Ligang, Zhang Zhi, Wang Zhenyu
Food and Machinery
Compared the High-speed Shear Dispersing Emulsifier (HSDE) and the Enzymic Method to extract polysaccharides from Auricularia auricular by treating the Auricularia auricular polysaccharides yield as the indicator. The results showed that the optimum conditions for HSDE were: shearing speed 21 000 r/min, solid-liquid ratio 1︰110 (m/V), shearing time 6 minutes and temperature 80 ℃; the optimum conditions for enzymic method were :concentration of enzyme 1.2%, enzymatic hydrolysis time 60 min, pH 5.5 and temperature 55 ℃. The extraction yields were 24.43% for HSDE and 9.29% for the enzymic method. Compare to the enzymic method, HSDE is more effective, time-saving and …
Optimizationon Improving Dissolved Quantity Of Cordycepin From Cordyceps Militari Juice By Ultra-High Pressure Processing, Zhu Shuangjie, Dong Lili, Pan Jian, Du Qingfei, Luo Xia, Zhang Weizhu
Optimizationon Improving Dissolved Quantity Of Cordycepin From Cordyceps Militari Juice By Ultra-High Pressure Processing, Zhu Shuangjie, Dong Lili, Pan Jian, Du Qingfei, Luo Xia, Zhang Weizhu
Food and Machinery
In order to study the ultra-high pressure extraction of cordycepin from Cordyceps militaris fresh juice, the effect of opration conditions such as pressure, time, solid-liquid ratio and cycle number were analyzed. On the basis of single-factor test, the optimum extraction technology of cordycepin and mathematical regression model were established by response surface methodology. The result showed that the optimal extraction conditions were as followed: extraction pressure of 418 MPa, extraction time of 33 min, solid-liquid ratio of 1∶2 (m∶V), cycle number of 1. Under these conditions, the measured value of dissolved quantity of cordycepin was 84.69 mg/g of extract, to …
Effects Of High Enzyme Activity Soybean Powder On Whiteness Of Steamed Bread, Li Xiaoqian, Zhou Huiming, Zhu Kexue, Guo Xiaona, Peng Wei
Effects Of High Enzyme Activity Soybean Powder On Whiteness Of Steamed Bread, Li Xiaoqian, Zhou Huiming, Zhu Kexue, Guo Xiaona, Peng Wei
Food and Machinery
The effects of high enzyme activity soybean powder with different mass ratios in wheat flour on whiteness of steamed bread were studied. The results showed that the whiteness of steamed bread increased firstly and then decreased with the addition of high enzyme activity soybean powder. When the concentration reached 0.5%, the whiteness of steamed bread was the best with the highest L* value, a* value and lowest b* value, yellow pigment content. Yellow pigment content with different water content , water temperature, mixing time, in the dough mixing process were measured, the results showed that the effect of high enzyme …
Condition Optimization And Application Of Pectin Degradation In Reconstituted Tobacco, Hao Hui, Wang Gaojie, Xu Chunping, Zhang Zhan, Nie Cong, Sun Siwen, Ma Yuping
Condition Optimization And Application Of Pectin Degradation In Reconstituted Tobacco, Hao Hui, Wang Gaojie, Xu Chunping, Zhang Zhan, Nie Cong, Sun Siwen, Ma Yuping
Food and Machinery
In order to reduce the pectin content (mass fraction) in reconstituted tobacco, the degradation conditions of tobacco stem end mixture from defiber and extraction during paper-making reconstitution process by pectinase from Aspergillus niger were optimized by single factor and orthogonal experiment methods. The pyrolysis products were investigated by on-line pyrolysis gas chromatography / mass spectrometry (PY—GC/MS) prior to and after enzymolysis. The monosaccharide composition of pectin prior to and after enzymolysis was analyzed by silanizing GC/MS. And sensory evaluation was investigated by adding the degraded tobacco sample into cigarette. The results showed that: the optimal reaction conditions of pectin degradation …
Optimization On Processing Technology Of Strawberry Jam With Osmotic Dehydrated Fruit And Konjac Powder, Wang Zhongfeng, Wei Tian, Liu Yan, Dai Chao
Optimization On Processing Technology Of Strawberry Jam With Osmotic Dehydrated Fruit And Konjac Powder, Wang Zhongfeng, Wei Tian, Liu Yan, Dai Chao
Food and Machinery
With fresh strawberry as raw material, the osmotic dehydration conditions, and the technological process and the formula for strawberry jam were studied. Each strawberry fruit was cut longitudinally into 4 equal parts, and impregnated in fructose syrup of 70 °Brix at 40 ℃ and atmospheric pressure for 2 h, which could make the water loss by 42% (based on original water content in fresh fruit). The osmotic dehydrated fruits were mashed into jam with 25 g/kg of konjac powder, 0.15 g/kg of sodium cyclamate and 0.03 g/kg of monascus pigment. The strawberry jam with high konjac glucomannan and low sugar …