Food Processing Commons^™

Preparation Of Water-Soluble Resveratrol/Hp-Β-Cd Microcapsule By Spray Drying Method, Tang Hongwei, Kuang Chuntao, Xiang Shu, Li Xiangzhou, Yang Ting, Yi Xiangguang

Food and Machinery

Hydroxypropyl-β-cyclodextrin (HP-β-CD) was used to improve water solubility of Res. The preparation conditions of Res/HP-β-CD microcapsule by spray drying method were optimized, and Res/HP-β-CD microcapsule was confirmed by UV, IR and SEM. The results showed that optimum preparation conditions of Res/HP-β-CD microcapsule were mass ratio of Res to HP-β-CD for 1∶5, stirring at 30 ℃, feed flow rate for 2.1 mL/min and inlet-air temperature for 140 ℃. The rate of drug-loading and the solubility of Res were 15.18% and 12.75 g/L, respectively, under the optimum conditions. UV, IR and SEM tests of Res/HP-β-CD microcapsule demonstrated that the aqueous solubility of …

Optimization On The Formula Of The Compound Vermicelli Frompurple Potato Starch By D-Optima Mixture Design, Zeng Xuedan, Zhang Can, Wang Zhangying, Jiang Guangyang, Shen Guanghui, Wu Hejun, Chen Anjun, Li Shanshan, Zhang Zhiqing

Food and Machinery

In order to optimize the quality of vermicelli of purple potato starch, the formula of five kinds of starch from purple potato, sweet potato, tapioca, potato and purple potato residue powder, were investigated with the D-optimal mixture design. The principal component analysis and dimensionless normalization method were used to comprehensively assess the quality of vermicelli from purple potato starch. During the mixture design experiment, the linear regression models were built based on the response values of the three synthesis scores of the texture characteristics (T₁), cooking characteristics (T₂) and sensory characteristics (T₃). The results …

Progress Of Analytical Methods For Antibiotic Residues In Plant-Derived Food, Zhou Jie, An Jiao, Dong Chao, Zhao Jing, Zhang Yaohai, Jiao Bining

Food and Machinery

In order to assess the health risks of antibiotic exposure to humans, it is needed to establish the rapid screening and confirmation testing methods for antibiotic residues in plant samples. This paper briefly introduces the registration and limit standards of agricultural antibiotics in China, the origin and accumulation of antibiotics in plant-derived foods, especially the present pretreatment and detection techniques of antibiotic residues in plant-derived foods, and prospects the work in this field.

Regulatory Disclosure Policies And Potential Induced Changes In Behavior: An Outcome Evaluation Of Santa Clara County’S Enhanced Food Safety Program Elements, Christian Cruz

Master's Projects

Despite countless advances in food microbiology and public health regulations, foodborne illness continues to be a major strain on public health outcomes and a costly economic burden. In the United States, many agencies are responsible for ensuring the quality of food, both domestically produced and imported. States and localities are delegated the responsibility of identifying and ensuring sound practices in the latter stages of the food production process, namely the retail distribution of food products to consumers.

Regulatory policies across the nation have only recently incorporated the evidenced-based principles of hazard risk management (Law, 2003). Still, food-related acute gastrointestinal illnesses …

Encapsulation Of Astaxanthin-Enriched Camelina Seed Oil Obtained By Ethanol-Modified Supercritical Carbon Dioxide Extraction, Liyang Xie

Department of Food Science and Technology: Dissertations, Theses, and Student Research

Astaxanthin is a high-value carotenoid widely used in the food, feed, nutraceutical, and pharmaceutical industries. Natural sources of astaxanthin are preferable to synthetic sources. However, current sources of natural astaxanthin are limited and fall short of global demand. In addition, effective extraction and stabilization strategies are needed before the utilization of natural astaxanthin in food applications. This work investigated 1) the feasibility of ethanol-modified supercritical carbon dioxide (SC-CO2) extraction of astaxanthin from engineered camelina seed, a potential source of natural astaxanthin, and 2) the potential of an emulsion-based system to protect astaxanthin after extraction. The physical properties of the emulsion …

Removal Mechanisms Of Deoxynivalenol By Bacillus Natto 16-1 In Wheat Flour, Zhang Chen, Xu Huiqing, Cui Guiyou, Ding Xiangli, Hu Jian, Li Bo, Yu Xiaofan

Food and Machinery

This research was to investigate the efficacy and mechanisms of removal of deoxynivalenol (DON) in wheat flour by Bacillus natto 16-1 by ELISA and high performance liquid chromatography / tandem mass spectrometry (HPLC-MS). The results show that, after 5 hours of culture, the DON removal rates were above 53% in different concentrations of bacterial suspension, fermentation supernatant, bacterial lysis liquid, crude enzyme liquid and cell wall suspension. And there were significant differences among different concentrations of bacterial suspension treatments, and high concentration of cell wall suspension treatment of DON removal rate was up to 62.85%. After 10 hours of culture, …

Synergistic Effect And Mechanism Of Ε-Polylysine Hydrochloride And Nisin On Bacillus Cereus, Shi Wenyan, Sun Zhen

Food and Machinery

The bacteriostatic action and mechanism of both against Bacillus cereus were studied by using ε-polylysine hydrochloride and nisin alone and in combination. The alkaline phosphatase content, UV absorbing content, pyruvic acid content and SDS-PAGE gel electrophoresis were used as indicators to comprehensively evaluate the antibacterial activity of ε-polylysine hydrochloride and Nisin against Bacillus cereus. The results showed that ε-polylysine hydrochloride and Nisin had a synergistic inhibitory effect on Bacillus cereus. Nisin mainly destroyed cell wall membrane structure and increased the permeability of cell wall membrane, while ε-polylysine hydrochloride mainly affected the growth and metabolism of bacteria by affecting ATPase activity, …

Prediction Model Of Surface Heat Transfer Coefficient In Oil Frying Based On Dimensional Analysis, Zhang Hongwen, He Laping, Deng Li, Li Cuiqin, Feng Lunyuan, Chen Cuicui, Yu Bingyan, Chang Rui

Food and Machinery

Based on the four dimensionless factors derived by dimensional analysis, the dimensionless prediction model for fluid-to-particle surface heat transfer coefficients (h_fp) was fitted by multivariate regression analysis. After modified the model with the residual analysis method, the final corrected coefficient of determination values R2 reaches 0.973. Furthermore, the five groups of verification set data were used to verify the accuracy of the constructed model, the predicted value of the theoretical model had a high consistency with the calculated value of the measured data, and the average relative error was 2.79%. The research indicated that dimensional analysis combined with …

Anslysis Of Volatile Compounds From Colla Corii Asini By Hs-Spme-Gc-Ms Combined With Amdis, Zhang Pengyun, Li Rong, Long Chunxia, Lin Shumian, Zhang Feng

Food and Machinery

A method for the determination of volatile compounds from Colla Corii Asini by headspace solid-phase microextraction (HS-SPME) coupled with gas chromatography-mass spectrome-try(GC-MS) combined with AMDIS was established.The total peak area and number of peaks of the volatile compounds were used as indices to optimize the different extraction conditions by single factor and orthogonal test. The results showed that the influence of extraction temperature was larger. The better extraction conditions were: the sample amount of 5 g, equilibration time 10 min, extracted for 50 min at 70 ℃ by 50/30 μm DVB/CAR/PDMS fiber and then desorbed 5 min. Under these conditions, …

Structural Design Optimization Of Built-In Vertical Clapboard For Rapeseed Fluidized Bed Dryer, Wang Cong, Zhang Jianping, Wang Yong, He Wang, Chen Hangyu

Food and Machinery

This study focused on the optimization of the structure of built-in vertical clapboard in the rapeseed fluidized bed dryer. Based on standard k-ε turbulence model and Euler two-fluid model, the number of region and the arrangement mode of clapboard was optimized through numerical simulation calculating software of Fluent. The results showed that the inhomogeneous three region clapboard was the best built-in vertical clapboard for rapeseed fluidized bed drying, enhancing the circulation of hot air, and reducing hot air accumulation in local areas. Finally, it realized the normal fluidization of gas-particle two-phase flow, and achieved the goal of uniform distribution of …

Preparation And Properties Of Limonene-Corn Starch Composite Film, Wang Yue, Wang Jianchuan, Pi Han, Deng Yue, Li Rui, Liang Xue, Wang Yihao, Liu Yaowen

Food and Machinery

A new type of degradable composite packaging film, limonene-corn starch composite film, was prepared by casting film forming method using corn starch, limonene and glycerin. The comprehensive properties of the composite membrane were analyzed by testing its mechanical properties, water vapor transmission rate, water absorption rate and the like. Results: compared with the pure corn starch film, the addition of limonene reduces the light transmittance of the composite film, and the mechanical properties and moisture barrier properties are improved, especially the elongation at break of the composite film is greatly improved. With the addittion of corn starch of 20 g, …

Mechanical Simulation And Validation Of Drop Impact Of Cushioning Packaging For Eggs, Li Zhao, Cao Mengmeng, Sun Jianming, Li Huajie

Food and Machinery

In order to reduce the breakage rate of eggs in circulation, the drop impact simulation of Expanded Polystyrene (EPS) and Expandable Polyethylene (EPE) commonly used in cushioning packaging of eggs were studied based on the fluid-structure coupling model by ABAQUS. Moreover, the strength of eggs was determined by strength test for providing the egg damage standard for simulation analysis. The results showed that the cushioning effect of EPE was better than that of the EPS at the same thickness. The cushioning material thickness of EPE (≥10 mm) and EPS (≥25 mm) could effectively satisfy the requirement avoiding the breakage of …

Research On Form Design Of Distilled Wine Bottle Based On Kansei Image, Feng Qing, Wu Zhiling

Food and Machinery

To understand the user's perceptual needs more accurately in design, a product form design method based on semantic difference method is proposed. Through the selection and establishment of kansei image vocabulary, the selection of samples and the establishment of kansei image semantic and morphological feature mapping model, information entropy is introduced to obtain the evaluation information entropy of user image. Value, as the constrained design of kansei image semantic quantification, has carried on the innovative design to a wine bottle, preliminarily verified the feasibility of this method, provides the reference for the innovative design of distilled wine bottle, and also …

Inhibitory Effect Of Lactobacillus Bacteriocin Durancin Gl On L. Monocytogenes In Chilled Chicken, Wu Xueyou, Chen Zhengxing, Ju Xingrong

Food and Machinery

Lactobacillus bacteriocin is a kind of bacteriostatic protein or polypeptide produced by Lactobacillus. It has great application value in food preservation. In this study, Durancin GL, a Lactobacillus bacteriocin, was used to treat chilled chicken for storage. The antiseptic effect of Durancin GL on chilled chicken was investigated by sensory evaluation, quality analysis and inhibition of harmful microorganisms. The results show that treatment of chilled chicken with 200 AU/mL bacteriocin preservative solution can inhibit the growth of L. monocytogenes, slow down the increase of total volatile basic nitrogen (TVB-N) content and pH, and slow down the deterioration of meat quality. …

Effect Of Plasma-Activated Water (Paw) Ice On The Quality Of Shrimps (Penaeus Orientalis) During Storage, Ai Chunmei, Xie Xiaoben, Liao Xinyu, Su Yuan, Gao Lingxiao, Wang Juefan, Liu Donghong, Ye Xingqian, Ding Tian, Jiang Zhumao

Food and Machinery

To verify the effect of plasma-activated water (PAW) ice on shrimps (Penaeus Orientalis) preservation, we stored shrimps with PAW ice and tap water (TW) ice at 20 ℃ and compared their differences in pH, TBA, TVB-N, total number of colonies, bacteria diversity, texture and color. The results showed that during 0~6 days storage period, the TBA and pH growth rate of the shrimps treated by PAW ice decreased, and the TVB-N value increased much faster than the TW ice-treated group. Moreover, the hardness of the shrimps treated with PAW ice was also less than that of TW ice-treated. This work …

Preparation And Properties Of Sodium Alginate-Gallic Acid Derivative, Yang Jieyu, Zeng Fankun, Zhong Jinfeng, Qin Xiaoli

Food and Machinery

Ascorbic acid and hydrogen peroxide were used as free radical initiators to induce the grafting of gallic acid onto sodium alginate, in order to enhance new properties of sodium alginate such as antioxidation and bacteriostasis, so that it could have potential in food preservation application. Folin-Ciocalteu method was used for determining the grafting degree of sodium alginate-gallic acid derivative. The results showed that the highest grafting degree was 4.260 mg/g when 5.54 mmol of hydrogen peroxide and ascorbic acid (molar ratio 3.5∶1.0) was added. Infrared and Raman analysis showed that new peaks were appeared in the spectra of the derivative, …

Research Progress Of Chitosan In Aquatic Products Preservation, Liu Jiali, Lan Weiqing, Liu Dayong, Zhang Xi, Xie Jing

Food and Machinery

On the basis of the introduction of common preservation methods in aquatic products, the preparation methods and antibacterial mechanism of chitosan were reviewed respectively. The research progress of chitosan in the preservation of aquatic products was summarized, and the existing problems and solutions were analyzed. Moreover, the development prospect of chitosan in the preservation of aquatic products was also prospected.

Effect Of The Degree Of Amylopectin Polymerization On Physicochemical Properties Of Jackfruit Seed Starch, Zhang Yutong, Zhang Yanjun, Zhu Kexue, Xu Fei, Li Shize, Wu Gang, Tan Lehe

Food and Machinery

The amylose and amylopectin were separated by jackfruit seed starch (JFSS), and the same amylose (50%) was mixed with five different types of amylopectin to prepare JFSS (M1′, M5′, M6′, M11′, and BD′) with different degree of amylopectin polymerization. The effect of the degree of amylopectin polymerization on physicochemical properties of JFSS was investigated. M1′ had the lowest degree of amylopectin polymerization (189 506), while BD′ had the highest (431 481). As the degree of amylopectin polymerization increased, the syneresis, gelatinization enthalpy, peak viscosity, trough viscosity, breakdown, final viscosity, setback, relative crystallinity, and absorbance ratios of the five JFSS samples …

Change In The Quality Of Coix Seed During Storage, Luan Linlin, Lu Hongmei, Chen Li, Yang Fengyi, Wu Yuzhang, Mou Cancan

Food and Machinery

The aim of the study was to explore quality of coix seed grown in Xingren, Guizhou (China) during storage. The results indicated that, color, ordor, main contents and correlate indexs of coix seed changed significantly during storage, which reflect the quality of coix seed decreases. Results: the color of coix seed changed with storing time lengthening. Original milky white, glossy coix seed became dimmed with yellowish and grayish with storing period lengthens. The odor was also from the original sweet aroma, which was ultimate rancidity. The rancidity of coix seed bacame stronger with storing time lengthening. During storage period, there …

Study On The Anti-Alcohol And Liver-Protection Efficacy Of Hydrolysate From Soft Tissue Of Corbicula Fluminea, Zhang Shuai, Zhang Chaohua, Gao Jialong, Qin Xiaoming, Zheng Huina, Hao Jiming, Zhan Gjing

Food and Machinery

The effect of hydrolysate from Corbicula fluminea soft tissue on the activation of alcohol dehydrogenase (ADH) in vitro was determined, and its effects of anti-alcohol and liver-protection on mice were also observed by measuring the drunk time, sober-up time, concentration of ethanol in serum, and the contents of malondialdehyde (MDA), triglyceride (TG) and glutathione (GSH) in liver tissue of mice. The results showed that hydrolysate from soft tissue of Corbicula fluminea could activate ADH in vitro with activation rate of 52%. It could also prolong the drunk time and shorten the sober-up time of drunken mice significantly, by 69.42% and …