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Articles 4531 - 4560 of 5782

Full-Text Articles in Food Processing

Methods Of Detecting The Content Of Folic Acid In Infant Complementary Food Supplements, Luo Minting, Wu Kegang, Huang Weiqian Sep 2016

Methods Of Detecting The Content Of Folic Acid In Infant Complementary Food Supplements, Luo Minting, Wu Kegang, Huang Weiqian

Food and Machinery

To detect infant complementary food supplements of folic acid, methds of microbiological method, solid-phase-extraction-HPLC and direct-ammonia-extraction-HPLC were utilized respectively. Analyses among the three methods were compared and the most accurate and rapid one was determined. The results showed the direct-ammonia-extraction-HPLC analysis by using the CH3OH-0.05 mol/L KH2PO4 (volum ratio,5∶95; pH 6.3) as mobile phase and controlling the peak time at 6.5 min, and the standard curve coefficient was 0.999 8 with detection limit 0.019 0 mg/L. Compared with the other two methods, this method was simple, rapid, sensitive and reproducible characteristics, and provided an effective theoretical basis to establish method …

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A High Precious Gutter Oil Detector Based On Complementary Metal Oxide Semiconductor, Yang Jie, Huang Haishen, Li Yangjun Sep 2016

A High Precious Gutter Oil Detector Based On Complementary Metal Oxide Semiconductor, Yang Jie, Huang Haishen, Li Yangjun

Food and Machinery

Since the different conductivity of gutter oil and edible oil normally result in the different resistivity per unit volume, a linear detection module based on CMOS (Complementary Metal Oxide Semiconductor) was designed, which shorted to ground combined with directly selection the resistor string to divide voltage makes more linear precision voltage divider. Under the action of counting pulse, the count resistor divider compares with the reference voltage to achieve different number of high level, which not only can distinguish gutter oil and edible oil, but also come to the mass fraction of edible oil, which incorporates gutter oil. In the …

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Design Of Needle-Typed Moisture Content Detecting Instrument Of Grains, Wang An, Wu Yang, Liu Quan Sep 2016

Design Of Needle-Typed Moisture Content Detecting Instrument Of Grains, Wang An, Wu Yang, Liu Quan

Food and Machinery

In order to enhance the speed and precision of grain moisture content measurement, and to satisfy the need of online detection of drying machinery, a new symmetric needle typed moisture content sensor which direct thrust into the grain was proposed, which was cooperated with high precision testing circuit and optimization algorithm, and the corresponding new equipment was designed. The trial results indicated that the error of paddy moisture content measurement was no more than 1% and the response time was less than 2 s. Through simple parameters setting, this equipment could be applied to measure moisture content of other grains. …

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Separation Of Citral From Litsea Cubeba Oil By Phase Transfer Catalysis, Fu Hongjun, Peng Xianglian, Kuang Chuntao, Zhong Haiyan Sep 2016

Separation Of Citral From Litsea Cubeba Oil By Phase Transfer Catalysis, Fu Hongjun, Peng Xianglian, Kuang Chuntao, Zhong Haiyan

Food and Machinery

Randomly methylated- β-cyclodextrin (RM-β-CD) was used as phase transfer catalysis to separate citral from Litsea cubeba oil by addition reaction and hydrolysis reaction. The optimum separation conditions were obtained by single factor experiment design and Box-Behnken experiment design. The purity and yield of citral were 96.50% and 86.60%, respectively, which was gotten under the optimum conditions of reaction time 3.3 h, RM-β-CD amount 0.65% (molar fraction) and reaction temperature 15.0 ℃. Predicted value was in accordance with actual value. This proposed method was used to separate citral from Litsea cubeba oil with convenient and had high efficient advantages.

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Progress In Research Of Mycelial Morphology Control Of Filamentous Fungiin Submerged Fermentation, Jiang Xuewei, Li Hao, Yang Chen, Xu Yantao, Luo Xiaoming Sep 2016

Progress In Research Of Mycelial Morphology Control Of Filamentous Fungiin Submerged Fermentation, Jiang Xuewei, Li Hao, Yang Chen, Xu Yantao, Luo Xiaoming

Food and Machinery

Filamentous fungi are widely used in industrial fermentation. Its mycelial morphology is closely combined with objective product yield and fermented liquid viscosity, and it is one of the key factors in the fermentation process control. In this paper, the research progress was reviewed on the mycelia of filamentous fungi in the submerged fermentation,including its morphological characteristics, the analysis and characterization methods, the mechanism of mycelial pellet formation, and the influence of mycelial morphology control in fermentation. Therefore, the author indicated that quantitative description the growth of filamentous fungi was the foundation of precision control on fermentation process.

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Research Progress On Preparation Of Nano-Starch And Its Application In The Preparation Of Edible Films, Zhou Yujia, Xiao Qian, Deng Fangming Sep 2016

Research Progress On Preparation Of Nano-Starch And Its Application In The Preparation Of Edible Films, Zhou Yujia, Xiao Qian, Deng Fangming

Food and Machinery

Nano-composite natural polymer based film not only have low energy consumption, ease the pollution to environment and the pressure on the dying up raw material of non-degradable synthetic material, but also realized the sustainable development of resources. Because of the enhancement of nano particles, the composite film shows more unique and excellent properties than conventional edible film, with low cost, rich available, regenerative and less pollution. Reviewed methods on the preparation of nano starch at home and abroad, including the, physical and chemical methods. Described the application in nano-composite edible films briefly, and summarized the researches on the improvement of …

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Breeding Of Temperature-Sensitive Mutant From Saccharomyces Cerevisiae, Yue Xijie, Jiang Xuewei, Luo Xiaoming, Zhou Hui, Liu Yongle, Chen Daiwen, Zhou Zhiming Aug 2016

Breeding Of Temperature-Sensitive Mutant From Saccharomyces Cerevisiae, Yue Xijie, Jiang Xuewei, Luo Xiaoming, Zhou Hui, Liu Yongle, Chen Daiwen, Zhou Zhiming

Food and Machinery

In order to obtain the efficient secretion of intracellular product in yeast, as the original strain,Saccharomyces cerevisiae (2n), (n) were mutagenized with UV treatment, five mutants strain may have temperature-sensitive were selected. To further identify, Y1 was used as the control bacterium, and its content of extracellular nucleic acids, proteins and FDP were determined, find that the highest degree of autolysis was Ts4(2n), it’s content of nucleic acid and protein in extracellular environment were 1.709, 1.483, the concentration of FDP in extracellular environment was 38μg/mL, higher than Y1 24.1%. Ts*2 (n) and Ts* …

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Influence Of Different Conditions On Mass Transfer Kinetics Of Rabbit Meat During Wet-Curing, He Cui, Xia Yangyi, Zhang Yan, Su Yan Aug 2016

Influence Of Different Conditions On Mass Transfer Kinetics Of Rabbit Meat During Wet-Curing, He Cui, Xia Yangyi, Zhang Yan, Su Yan

Food and Machinery

The influence of different curing conditions including brine concentration (6%, 10%, and 15%), temperature (4, 15, and 25 ℃) and stirred on mass transfer kinetics of fresh rabbit meat during wet-curing was analyzed. The results showed that the changes of water (ΔMwt), salt content (ΔMNaClt) and weight (ΔM0t) had good correlation with the square root curing time (t0.5) in different curing conditions, and k2 was affected by brine concentration, temperature and stirring. Our results showed that the brine concentration of 10% could cause the highest diffusion value (1.18×10-9 m2/s) ,and the biggest …

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The Analyses On Chemical Components In The Leaf Volatile Oils Of Zephyranthes Candida（Lindl.）Herb. And Their Antimicrobial Activities In The Fresh Milk, Wei Qiang, Shi Xuefeng Aug 2016

The Analyses On Chemical Components In The Leaf Volatile Oils Of Zephyranthes Candida（Lindl.）Herb. And Their Antimicrobial Activities In The Fresh Milk, Wei Qiang, Shi Xuefeng

Food and Machinery

Two kinds of volatile oil were extracted by steam distillation extraction (SDE) and supercritical fluid extraction of CO2 (SFE-CO2), and then they were identified by gas chromatography-mass spectrometry (GC—MS). The antimicroble effects of the extract on different rot funguses in fresh milk was evaluated in 4 ℃ within 10 days. There were 39 different components in the two kinds of volatile oil, including methyl cyclohexane, octacosane, 1,3-dimethyl-benzene, and dibutyl phthalate mainly found in the SDE volatile oil, and 4-(4-ethylcyclohexyl)-1-pentyl-cyclohexene, toluene, 1,2-benzenedicar-boxylic acid, diisooctyl ester, 1-ethoxy-pentane, 2-methoxy-4-vinylphenol, and 2,4-bis(1,1-dimethylethyl)-phenol mostly presented in the SFE-CO2 volatile oil. The differences among the contents …

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Analysis Of Aroma Components Ingeranium Oil By Gc/Ms Combined With Retention Index, Li Yuandong, Li Xianyi, Duan Yanqing, Liu Xiuming, Dangl Izhi, Huang Libin Aug 2016

Analysis Of Aroma Components Ingeranium Oil By Gc/Ms Combined With Retention Index, Li Yuandong, Li Xianyi, Duan Yanqing, Liu Xiuming, Dangl Izhi, Huang Libin

Food and Machinery

The aroma components of geranium oil were analyzed by GC/MS, and the peak area normalization method was used to calculate the relative content of each component. With the mass spectrometry library search, 61 compounds which account for 86.217% in the aroma components of geranium, were identified by using reference literature retention index. The cis(trans)-isomers were confirmed by using retention index, and the accuracy of compound qualitative analysis in natural flavor was improved. The aroma of the key aroma compositions of the geranium oil (Citronellol, Geraniol, Citronellyl formate, Menthone, Geranyl formate, Isomenthone, Geranyl tiglate, Rose oxide, Geranyl butyrate, et al) was …

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The Establishment Of Characteristic Fingerprints Of Faint-Scent Cigarettes, Ying Fei, Song Shiqing, Zhang Xiaoming Aug 2016

The Establishment Of Characteristic Fingerprints Of Faint-Scent Cigarettes, Ying Fei, Song Shiqing, Zhang Xiaoming

Food and Machinery

In order to test the quality and characteristics of faint-scent cigarettes by the technology of GC—MS and electronic nose fingerprint, the method of SDE combined with GC—MS and electronic nose were used to construct their standard and radar fingerprints. Samples of non faint-scent cigarettes were selected to study the standard fingerprint. Results of similarity calculation showed that six batches of faint-scent cigarettes had a much higher similarity with the standard fingerprint, and the extent similarity was more than 85%, while the other six batches of non faint-scent ones had a lower similarity. This indicated that the faint-scent and non faint-scent …

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Measurement Characteristics Analysis Of Microwave Cigarette Density Distribution Detector, Liu Minchang, Liu Yang, Wen Ruoyu, Zeng Jian, Zhao Weiyi Aug 2016

Measurement Characteristics Analysis Of Microwave Cigarette Density Distribution Detector, Liu Minchang, Liu Yang, Wen Ruoyu, Zeng Jian, Zhao Weiyi

Food and Machinery

In order to analyze the measurement characteristics of microwave cigarette density distribution detector, the effects of types, width and position of tipping paper, and filling length of filter rod were studied. In this paper, the sample making method that can effectively reduce the measurement error is proposed, and the relationship model between measurement value and filling length of filter rod is also established. Our results showed that the detection accuracy can be theoretically improved by reducing the thickness of the microwave cavity, and this provides a new clue for further optimizing the detector of microwave cigarette density distribution.

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Wide-Scope Screening Of Multiple And Illegal Additives In Foods By High Performance Liquid Chromatography-High Resolution Mass Spectrometry, Zhang Fan, Yan Hongfei, Dai Jieyun, Wu Bo, Huang Zhiqiang, Zhang Ying, Wang Meiling Aug 2016

Wide-Scope Screening Of Multiple And Illegal Additives In Foods By High Performance Liquid Chromatography-High Resolution Mass Spectrometry, Zhang Fan, Yan Hongfei, Dai Jieyun, Wu Bo, Huang Zhiqiang, Zhang Ying, Wang Meiling

Food and Machinery

A method was developed screening, confirming and quantifying multiple additives and banned dyes in wine, juice and other beverages by liquid chromatography-ion trap-time of flight tandem mass spectrometry (LC-MS-IT-TOF). The accurate and multiple-stage mass spectrometry database of 41compounds was established. The analytes in samples were diluted with water-methanol (v/v). In the chromatographic analysis, target compounds were separated on a C18 column (150 mm × 4.6 mm, 5 μm) with the gradient elution using the mobile phases of methanol and 2 mM ammonium acetate. The results showed that the limits of detection were 0.005～1.0 mg/kg. The method validation was carried …

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Study On Typical Volatiles Of Rice Contaminated By Aspergillus Flavus During Storage, Ren Jiali, Tang Yunpeng, Zhang Ziying, Zhou Chao Aug 2016

Study On Typical Volatiles Of Rice Contaminated By Aspergillus Flavus During Storage, Ren Jiali, Tang Yunpeng, Zhang Ziying, Zhou Chao

Food and Machinery

A headspace-solid phase microextraction/gas chromatography-mass spectrometry (HS—SPME/GC—MS) was used to analyze the volatiles of rice contaminated with Aspergillus flavus and their ion chromatograms were obtained. Combined TurboMass and NIST Search software, 26 volatile metabolites were identified in rice contaminated with Aspergillus flavus, including five kinds of aldehydes, six kinds of alcohols, one kind of ketone, nine kinds of hydrocarbons, one kind of ester, one kind heterocyclic, one kind of organic acid, one kind of amine. Based on aflatoxin catabolism and substance transformation in the rice, 2-hydroxy inferred-propionamide and Heptaldehyde are typically volatile component group, which would be used as typical …

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Determination Of 5 Heavy Metal Elements And 15 Rare-Earth Metal Elements In Dark Tea, Chen Xiong, Fang Xuanyi, Dai Xuan, Chen Tiebi, Liu Xiaowen, Li Wenyi Aug 2016

Determination Of 5 Heavy Metal Elements And 15 Rare-Earth Metal Elements In Dark Tea, Chen Xiong, Fang Xuanyi, Dai Xuan, Chen Tiebi, Liu Xiaowen, Li Wenyi

Food and Machinery

Under the optimized conditions, the samples were analyzed by ICP—MS with the triple internal standard elements Rh, In and Re. Good linearity of standard curves of twenty elements were obtained, and all the linear coefficient of them were above 0.999. The detection limits were in the range of 0.001 2～0.10 ng/mL. GBW10052-green tea, the certified reference material was analyzed and the results showed good agreement with the certified values. Five dark tea samples were determined by the proposed method. In the recovery experiment controlled by adding stand substance, the recoveries were range from 92% to 105%. It was indicated that …

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Application Of Ionic Liquids In The Detection Of Antibiotic Negative Milk, Zhou Xinkui, Hong Xia, Qian Yingwen, Deng Lijuan, Wang Jiebin, Gao Zhiying, He Haining, Liu Qi Aug 2016

Application Of Ionic Liquids In The Detection Of Antibiotic Negative Milk, Zhou Xinkui, Hong Xia, Qian Yingwen, Deng Lijuan, Wang Jiebin, Gao Zhiying, He Haining, Liu Qi

Food and Machinery

Hydrophobic ionic liquid 1-octyl-3-methylimidazolium hexafluorophosphate [(C8MIM) (PF6)] was synthesized using metathesis method, and then the ionic liquid was purified by activated carbon and macroporous resin solid phase extraction column, to get a colorless, transparent product [(C8MIM) (PF6)] with a yield of 87.6%. The ionic liquids was used to extract penicillin and penicillin-thiazole acid hydrolysates in milk and dairy products, and its extracting condition was optimized. After that the content of penicillin and penicillin thiazole acid were detected by utilizing self-developed HPLC method, and it could be indirectly determined whether the milk and …

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Quality Control Of Reagent In Food Microbiology Laboratory, He Yan, Yang Tao, Peng Shifu Aug 2016

Quality Control Of Reagent In Food Microbiology Laboratory, He Yan, Yang Tao, Peng Shifu

Food and Machinery

As the indispensable supplies in food microbiology laboratory test, reagent supplies' quality directly affects the accuracy of the test results. To provide guidance for reagent supplies quality control, this article comprehensively analyzes the quality control of food microbiology laboratory from the respect of procurement, quality inspection & acceptance of appearance and immanency, storage, use, etc, and especially focus on internal quality acceptance of commercial medium and reagent.

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Study On The Performance Of Heat Transfer Enhancement Of New Convex Groove Stirred Tank With Two Impellers, Xu Xiaoguang, Zhang Lin, Su Zhaolong, Jia Wenyi, Hu Meirong, Wu Xuehong Aug 2016

Study On The Performance Of Heat Transfer Enhancement Of New Convex Groove Stirred Tank With Two Impellers, Xu Xiaoguang, Zhang Lin, Su Zhaolong, Jia Wenyi, Hu Meirong, Wu Xuehong

Food and Machinery

In this paper, based on the traditional steam heating stirred tank, a new type tank is presented with low wall temperature and convex groove. The performance of heat transfer and fluid flow is studied using detached eddy model. The results show that the velocity near the rotor area is large. The velocity in static area is uniform. Due to the small interaction between the upper and down blades, there have four cycle vortex in the tank, which are two parallel vortexes near each blade. When the speed of impeller N=96 r/min, the wall temperature is 358 K to heating 293 …

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The Design And Finite Element Analysis Of The Adlay Grindingplate Sheller, Hu Zhigang, Zhang Yonglin, Hou Chuanliang, Liu Jun Aug 2016

The Design And Finite Element Analysis Of The Adlay Grindingplate Sheller, Hu Zhigang, Zhang Yonglin, Hou Chuanliang, Liu Jun

Food and Machinery

A new method of adlay shelling was presented to design a sheller. The adlay shelling technology that a mutual friction between grinding wheel and nylon wheels horizontally placed shell adlay was used. Moreover, the three-dimensional structure of sheller was designed, and the main parts of machine were also checked. Furthermore, in order to prevent the occurrence of resonance, ANSYS modal analysis of the body and the frame were carried out. The prototype of Adlay shell test results showed that the raw material processing capacity was 0.3 t/h, the shelling rate was greater than 95%, the whole kernel rate was more …

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Design And Test Of Hot Pressing Extraction Equipment With Composite Rotary Agitation And Auto-Discharging For Bone Extract, Wu Ting, Jia Wei, Zhang Chunhui, Li Xia, Guan Sheng, Han Ling, Yu Qunli Aug 2016

Design And Test Of Hot Pressing Extraction Equipment With Composite Rotary Agitation And Auto-Discharging For Bone Extract, Wu Ting, Jia Wei, Zhang Chunhui, Li Xia, Guan Sheng, Han Ling, Yu Qunli

Food and Machinery

Design a type of hot pressing extraction equipment with composite rotary agitation and auto-discharging, which consists of three parts: tank, composite rotary agitation device and feeding device. The equipment is a horizontal stirring extraction, to avoid the problem that the extract is mixed with the solid material irregularity in conventional extraction method, and greatly increase the heating rate and extraction efficiency. Propelled scraper agitator and mixing paddle type impeller installed spaced equidistant, and the motor can forward and reverse, which make the extraction process and the process of tapping automatic. The use of two dimensional heating via jacket and stirring …

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Design Of The Mechanism Principle Of The New Green Walnut Peeling Machine, Zhao Jingtao, Shang Pengxu, Wu Xiaoxue, Fang Ye Aug 2016

Design Of The Mechanism Principle Of The New Green Walnut Peeling Machine, Zhao Jingtao, Shang Pengxu, Wu Xiaoxue, Fang Ye

Food and Machinery

The peeling machine is mainly used for separation of the green walnut green and walnut, using a single walnut peeling process, along with cutting through broken skin, torsion straining, and casting skin process. In order to realize the continuous feeding and discharging, a special kick-off device was designed, by utilizing a series of repeat actions, including rotation-depression-torsion-reduction, finally achieve the separation of the green walnut pericarp from walnut. It turned out that the mechanical structure was compact and easy to operate as well as the knifes were systematized. Therefore, the appropriate tool can be replaced according to the specific utilization. …

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Design And Test Of Walnut Shell Creaking Machine With Four Extrusion Forces, Yan Ru, Zhao Kuipeng, Wang Yaxiong, Li Jun, Chen Jing Aug 2016

Design And Test Of Walnut Shell Creaking Machine With Four Extrusion Forces, Yan Ru, Zhao Kuipeng, Wang Yaxiong, Li Jun, Chen Jing

Food and Machinery

According to the problems of low shell breaking rate and whole kernel rate caused by exerting two forces, a four forces shell creaking machine was designed and made. The contrast shell breaking experiment of ‘two forces and four forces’ and preliminary test were conducted, which showed the four forces shell breaking machine that apply to all over the size of walnuts had a better result than the two forces machine. The extrusion length has a significant impact on the shell cracking situation, but less on the walnut size. With the moisture content 10%, extrusion length 6 mm , cracking effect …

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Study On Grading Of Betel Nuts By Computer Vision, Xu Yueming, Cai Jianrong, Gong Yinghui Aug 2016

Study On Grading Of Betel Nuts By Computer Vision, Xu Yueming, Cai Jianrong, Gong Yinghui

Food and Machinery

Current technologies for grading betel nuts remain rudimentary and heavily rely on manual inspection, which results in no assurance over grading quality. This paper describes a betel nut grading method based on the computer vision technology, which comprises image capture and pre-processing to collect characteristics such as color, shape, and texture. It is observed that combining both color and shape characteristics leads to satisfactory grading results. This method can reach a recognition rate over 90.38% following principle components analysis (PCA) and a support vector machine (SVM) algorithm.

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Research On Fruit Grading Detection System Based On Sopc, Qiao Lu, Chen Jing Aug 2016

Research On Fruit Grading Detection System Based On Sopc, Qiao Lu, Chen Jing

Food and Machinery

In order to solve traditional fruit grading detection system of graded speed slow, huge system and high cost, puts forward the detection system based on SOPC fruit grading, and the whole control system was integrated into a FPGA chip, which can be detached from the PC platform, greatly reduces the cost. Through the Soble algorithm to achieve the edge of the fruit image extraction, and the method of histogram of the size of the fruit to distinguish, the fruit could be accurately classified. Test results show that this system has the advantages of fast detection speed, short development cycle, and …

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Study On Tunnel Pasteurization Of Bottled Beer Based On Cfd Technology, Cheng Ju, An Jiayan, Dong Wengyong, Wang Yue Aug 2016

Study On Tunnel Pasteurization Of Bottled Beer Based On Cfd Technology, Cheng Ju, An Jiayan, Dong Wengyong, Wang Yue

Food and Machinery

In the industrial processing of beer, pasteurization is necessary the to guarantee its biological stability. The superheat phase (the last part of heating phase) was numerically simulated, in which the slowest heating zone (SHZ) inside the bottle was determined, and then the influence of three parameters on the uniformity of temperature distribution inside the bottled beer during pasteurization, i.e. the temperature of spray water, the turbulent intensity of spray water at the spray nozzles and the running velocity of bottles were analyzed using L9 (34) orthogonal experiments. The results indicated that SHZ lay at the bottom of …

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Application Of Profibus-Dp In The Screw Pump Control System In Tomato Paste Plant, Hu Bing, Wang Xiaojuan Aug 2016

Application Of Profibus-Dp In The Screw Pump Control System In Tomato Paste Plant, Hu Bing, Wang Xiaojuan

Food and Machinery

The speed of screw pump motor used for crushing tomatoes in corresponding paste plant influences the quality of its processing seriously. Therefore, based on Profibus-DP, we proposed a control method in order to actually operate the screw pump motor for real-time monitoring with a touched PC and PLC screen. Moreover, the frequency converter was used as actuators system solutions, and the operation was analyzed according to the debugging steps. The results showed that the system characterized by good stability and fast response could run a good monitoring of screw pump motor as well as get real-time feedback of running and …

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The Dominant Spoilage Bacteria And Their Growth And Decline Law In Fresh Lotus Seeds Storedat The Cold Storage, Wang Jianhui, Wang Xiu, Wang Faxiang, Li Xianghong, Y Ujian, Jin Na, Liu Yongle Aug 2016

The Dominant Spoilage Bacteria And Their Growth And Decline Law In Fresh Lotus Seeds Storedat The Cold Storage, Wang Jianhui, Wang Xiu, Wang Faxiang, Li Xianghong, Y Ujian, Jin Na, Liu Yongle

Food and Machinery

In this study, spoilage bacteria in fresh Xiang lotus seeds preserved at 4 ℃ temperature for 18 d were separated by dilution-plate method. Total genomic DNA was extracted from these strains and then subjected to PCR amplification. Dominant spoilage bacteria were identified using 16S rDNA sequencing for the identification and the law of their growth and declination was drawn. The results showed the four dominant spoilage bacteria in fresh Xiang lotus seeds preserved at the temperature of 4 ℃ were Pantoea dispersa, Staphylococcus epidermidis, Staphylococcus warneri, and Pantoea agglomerans. At the storage temperature of 4 ℃, the growing trends of …

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Effect Of Hypobaric Storage On Quality Of Agaricus Bisporus, Cheng Xi, Zhang Min, Fu Yang, Li Yunyun Aug 2016

Effect Of Hypobaric Storage On Quality Of Agaricus Bisporus, Cheng Xi, Zhang Min, Fu Yang, Li Yunyun

Food and Machinery

To investigate the effect of hypobaric storage on the fresh-keeping of Agaricus bisporus, The results showed that the low pressure-treated groups (25.3 kPa and 50.7 kPa) were able to maintain the good sensory quality of white button mushrooms, decrease respiration of mushrooms, significantly delay the change of the mushroom whiteness and hardness (P<0.05), maintain a high soluble solids (P<0.05), inhibit the PPO activity (P<0.05). Nevertheless, the hypobaric treatment increased weight loss of mushroom (P<0.05) and the lower pressure brought the higher the rate of weight loss. However, the weight loss of 50.7 kPa and 76.0 kPa group was at an acceptable range. Above all, the 50.7 kPa group achieved the best effects.

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Research On The Detection Model Of Egg Freshness Based On The Near-Infrared Spectroscopy Technology, Jie Dengfei, Wang Xiaojing, Wei Xuan Aug 2016

Research On The Detection Model Of Egg Freshness Based On The Near-Infrared Spectroscopy Technology, Jie Dengfei, Wang Xiaojing, Wei Xuan

Food and Machinery

The rapid and nondestructive detection method of egg freshness was investigated based on the near-infrared spectroscopy technology combined with the wavelength selection method in this study. We promoted using the egg yolk index as the target to estimate the freshness of eggs. The results showed that the models established for pH value and Hough units were unacceptable and the egg yolk index detection models were the best. By applying the successive projections algorithm (SPA), 12 wavenumbers were chosen out, i.e., 4 188.6，4 593.6，4 855.9, 5 311.0, 5 376.6, 5 935.8, 6 306.1, 7 243.3, 7 328.2, 7 343.6, 8 130.4 …

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Effect Of Storage Control Method On Quality Of Germ-Left Rice During Storage, Yan Song, Meng Qinghong, Gao Yang, Zhang Zhihong, Yuan Chao, Wang Liqun, Lu Shuwen Aug 2016

Effect Of Storage Control Method On Quality Of Germ-Left Rice During Storage, Yan Song, Meng Qinghong, Gao Yang, Zhang Zhihong, Yuan Chao, Wang Liqun, Lu Shuwen

Food and Machinery

Germ-left rice contains a large amount of nutritional ingredients, but its quality degradation easily occurs. In order to improve the storage quality of germ-left rice, the effects of several packing material and storage parameters on storage time of germ-left rice were investigated. Microwave intensity, gas regulating mode and ambient temperature were selected as influencing parameters, and critical storage duration (responding to fat acid content of 35 mg KOH/100 g DB in germ-left rice) as the indicator on quality evaluation. Response surface methodology was used to analyze the effect regulation of storage parameters on the storage time of the germ-left rice，to …

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