Food Processing Commons^™

Texture And Rheological Properties Of Compourd System Of Tara Gum And Xanthan Gum, Niu Haijia, Liu Aiguo, Liu Lizeng, Gao Xiaoxiayue, Wang Pengcheng, Qiang Feng

Food and Machinery

The TG and XTG with a total concentration of 1% were compounded according to different quality ratios. Then the gel properties and rheological properties of the compound system were determined by the texture analyzer and the rheometer, and flow curves were analyzed by using Carreau model. the forming mechanism of compound system network was analyzed by scanning electron microscopy(SEM). The texture analysis indicated that the maximum gel strength was obtained when TG/XTG quality ratio was 6∶4, Moreover, there was the maximum G’ in frequency scanning and temperature scanning. As a result, the best compound quality ratio between TG and XTG …

Determination Of Polycyclic Aromatic Hydrocarbons By Mspe-Hplc-Uv-Based On Covalent Organic Frameworks, Hu Biqing, Ye Jia, Li Qianlian, Pang Jie, Yan Zhiming

Food and Machinery

A novel magnetic covalent organic framework (Fe₃O₄@COF-SCU1) was prepared via a facile method, and was used for the magnetic solid phase extraction (MSPE) of eight polycyclic aromatic hydrocarbons (PAHs) from dahongpao tea soup, which were analyzed by high performance liquid chromatography-UV (HPLC-UV). Fe₃O₄@COF-SCU1 was characterized by electron scanning microscope, electron transmission microscope, X-ray diffraction, nitrogen isothermal adsorption and desorption, and Fourier transform infrared. In this experiment, the composition of Fe₃O₄@COF-SCU1, the adsorption and elution conditions of MSPE were systematically optimized, and the qualitative and quantitative analysis method of …

Non-Destructive Identification Of The Storage Quality Of Paddy Using Nearinfrared Spectroscopy With Neighborhood Rough Set Algorithm, Yang Dong, Chang Qing, Yuan Jianghao, Cao Yang, Zhao Huiyi

Food and Machinery

In order to quickly and accurately detect the status of paddy during storage, the near infrared (NIR) technique was used to establish classification models for identifying the storage quality of paddy. The NIR data of 285 samples in the range of 1 000～1 800 nm were collected. Based on the measured fatty acid, the storage state of the sample was divided into three categories (good storage quality, moderate storage quality obviously tending to decline, and poor storage quality). The optimal 10 wavelengths were selected by neighborhood rough set (NRS) algorithm. The best classification model was established by the combination of …

Identification Of Staining In Cigarette Sources Based On Atr-Ftir Technology, Du He, Li Xiaobo, Ma Jun, Zheng Meiling, Shu Yunbo, Zhang Junsong

Food and Machinery

The spectrum of self-made staining in cigarette and actual staining in cigarette spots were collected by attenuated (ATR-FTIR). Through the methods of intuitive comparison, database retrieval and similarity calculation, the sources of cigarette pollution were analyzed. And the Bootstrap method was used to set the similarity threshold, and the identification model of the staining in cigarette pollution source was established. The results showed that the method could verify the correct rate of the sample with 100%, and realize the qualitative analysis of the source of the staining in cigarette pollution. The method has good precision and reproducibility, and the RSD …

Mechanical Characteristics Analysis Of Face Pitting Damage On Helical Gear, Wu Dan, Zhang Limei, Zhao Huibo, Qi Bing, Lu Min

Food and Machinery

In order to study the influence of face pitting damage on helical gear, the helical gears on the secondary deceleration system was taken as an object and the geometric model of gears were built and assembled by SolidWorks. Using the finite element software Workbench, the meshing position of gears set surface contact, and the mechanical properties of intact and damaged gears were analyzed. Next, the analyses of variance were done including the factors of the driving wheel speed and the number of pitting corrosion. The results showed that the rotational speed and pitting damage had a certain influence on the …

Design And Analysis Of Radio Frequency Dryer For Small Particles (Containing Powder), Ling Zhengzheng, Ren Guangyue, Duan Xu, Lu Yingjie, Chen Xi

Food and Machinery

In view of the simple drying method of small granular (powder) materials, low heat utilization rate and ineffective guarantee of the quality of dry products, a pilot-scale radio frequency dryer for small granular (powder) materials was designed by using radio frequency heating technology. The device consistd of a heating system and a conveying system. The heating system mainly comprised an RF generator and a finned heating tube. The main conveying part of the conveying system was a conveyor belt. At the same time, in order to ensure the uniformity of RF drying, a material thickness limiting device was also designed. …

Study On Preservation For Raw Meat From Antibacterial Composite Membrane With By Chitosan-Based Nano-Zinc Oxide-Clove Oil, Fang Dandan, Wang Liqiang

Food and Machinery

Nano-zinc oxide is a kind of inorganic antibacterial agent, which had good antibacterial effect and didn’t produce drug resistance. Clove oil is a kind of natural antibacterial agent with spectral antibacterial properties and non-toxic health. In this paper, chitosan and konjac glucomannan were used as the film-forming substrates, two kinds of antibacterial agent were added to the biomass composite membrane. The antibacterial rate of the composite membrane against Escherichia coli and Staphylococcus aureus was 99.78% and 99.06%, respectively. The film had a strong antibacterial effect. The results of infrared spectroscopy indicated that the chitosan functional group and the phenol group …

Analysis Of Children's Food Packaging Image And Color Preferences Based On Cognitive Psychology, Huang Lu

Food and Machinery

The rules of the development of modern children's cognitive psychology were expounded and the development characteristics of cognitive psychology and artistic performance of children aged 3~12 years were analyzed combined with the actual research results. After obtaining the children's preference for food packaging in terms of image and color, some suggestions on how packaging design could satisfy children's purchasing emotional and psychological needs were given, from both image and color according to children's physical and mental development characteristics.

The Local Food Packaging Under The Concept Of Local Feelings Tends To Be More Designed And Expressed, Chen Qinxue

Food and Machinery

Aiming at the phenomenon of lack of local feelings in the current local food packaging, it was proposed that the packaging design needed to thoroughly investigate and analyze the local cultural resources, and fully reflect the local feelings in terms of regionality, simplicity and originality in the form of multi-dimensional expression. The idea was to meet people's demands for their feelings. This design concept should become the future trend of local food packaging design, which is more conducive to the sustainable development of local food.

Effect Of 3-O-Caffeoylquinic Acid On 5-Hydroxymethylfurfural Formation And Color In Dried Fruits, Zhou Kangning, Zheng Jie, Ou Shiyi, Pei Kehan

Food and Machinery

This research is aimed to investigate the effect of 3-O-caffeoylquinic acid (3-CQA) on 5-hydroxymethylfurfural (5-HMF) formation and color parameters during drying of four kinds of fruit crisps (apple, pear, apricot and plum). Results showed that the amount and composition of carbohydrate caused that different fruits produced different amount of 5-HMF: plum＞apricot＞apple＞pear. Soaking of fruit crisps with 3-CQA significantly increased the 5-HMF formation and HMF content is positively related to soaking and drying time. 3-CQA also promoted the browning during fruit drying via decreasing L^* but increasing C^* values. However, blanching decreased the formation of 5-HMF and the browning …

Effects Of Three Kinds Of Preservatives And Their Complexation On The Refrigerated Quality Of Rainbow Trout, Shen Qiuxia, Li Mingyuan, Zhu Keyong, Qian Yang, Xu Tongtong, Wu Lichuan, Yuan Yang

Food and Machinery

To research the effects of tea polyphenol, chitosan and lemon juice on the quality of refrigerated rainbow trout fillets stored at 4 ℃, the fresh-keeping effects were listed as follows: sensory, total volatile basic nitrogen (TVB-N) value and total viable counts. The ratio of the three preservatives was optimized by single factor and response surface methodology. The results showed that the three preservatives inhibited the sensory evaluation, TVB-N value and total viable counts of the fillets compared with the control group during storage. The fresh-keeping effects were as follows: chitosan>tea polyphenol>lemon juice. There was a significant interaction between …

Effects Of Potassium Sorbate And Sodium Pyrosulfite On Storage Quality Of Choerospondias Axillaris Peel Pulp In Different Temperature, Wang Risi, Chu Beibei, Ling Huashan, Chen Mingshun, Chen Jun, Liu Chengmei, Liu Jiyan

Food and Machinery

The effects of preservative (potassium sorbate or sodium pyrosulfite) on storage quality such as total colony number, colour L* value, polyphenol content, DPPH radical scavenging activity and pH of Choerospondias axillaris peel pulp at 4, 25 and 35 ℃ were first studied. The results showed that 0.050% potassium sorbate and 0.015%~0.050% sodium pyrosulfite could effectively inhibit the growth of microorganism. 0.015% sodium pyrosulfite had a good color protection effect during the pulping process and early storage stage of the pulp, but there was no significant difference between 0.015% sodium pyrosulfite and 0.050% potassium sorbate was found, when the storage time …

Effect Of Different Wall Materials On Physicochemical Properties Of Microcapsules With High Loading Pumpkin Seed Oil, Zhang Cuncun, Yuan Jifeng, Tan Zhichao, Xu Honggao

Food and Machinery

To develop 50% loaded pumpkin seed oil microcapsules, using spray drying technology, with higher stabilities, the amount of surface oil and peroxide value of dispersion oil, during accelerated shelf life test, were selected as criteria for optimizing the composition of wall materials. The sodium caseinate and sodium starch octenyl succinate were tested as the main components of wall materials. Other antioxidants (sodium ascorbate, ascorbic acid and D-sodium erythorbate) and emulsifies (soybean phospholipid, mono- and diglycerides of fatty acids) were also applied and tested for the stability of pumpkin seed oil microcapsules. Polydextrose, a stuffing bulking agent, was also tested for …

Effects Of Red Ginseng Extracts Irradiated With 60Co-Γ On Type 1 Diabetes Mice, Qi Xin, Cui Chengbi, Jin Liying, Jiang Xin, Zhang Lu

Food and Machinery

In order to probe the effects of red ginseng extracts irradiated with ⁶⁰Co-γ, the mice model of type I diabetes mellitus was induced by streptozotocin (STZ). The body weight and fasting blood glucose of mice were measured regularly during the experiments. After 30 days’ test, blood samples, which were collected from eyeball and glycosylated hemoglobin (HbAlc), were measured. Total cholesterol (TC) and triglyceride (TG) levels in serum were determined and analyzed. The organs of the heart, liver, spleen and kidney were dissected and the organ coefficients were measured. Results showed that the fasting blood glucose level of mice group …

Study On The Compound Enzyme Extraction Process Of Glehniae Radix And Its Physicochemical Properties, Jing Yongshuai, Zhang Danshen, Zhang Ruijuan, Han Yu, Liu Dongbo, Zheng Yuguang, Wu Lanfang

Food and Machinery

Response surface analysis were carried out to optimize the extraction process of polysaccharide from Glehniae Radix (GLP-E), and GLP-E was separated and purified with DEAE-52 ion exchanger. The monosaccharide composition, molecular weight, and the scavenging effect on DPPH free radicals were investigated. The results showed that the optimal extraction conditions of polysaccharides from G. Radix were as follows: the liquid-to-solid ratio was 30∶1 (mL/g), with the addition of 3% enzyme and the ratio of cellulase to papain at 3∶1, hydrolyzed at 70 ℃ for 3 h. Under the control of these conditions, the extraction rate of polysaccharides from G. Radix …

Preparation And Antioxidant Activity Of Protein Peptides By Enzymatic From Hohenbuehelia Serotina, Li Minghong, Jiang Yiyue, Zhang Xiaoyong, Cui Fushun

Food and Machinery

To prepare protein peptides from Hohenbuehelia serotina by enzymatic method, the composition of amino acids, structure and biological activity of protein peptide were analyzed. Proteolytic enzymes were selected with hydrolysis degree and DPPH scavenging rate to optimize the enzymatic hydrolysis conditions by response surface methodology. The protein peptides from Hohenbuehelia serotina was classified to P₁ (＜3.5 kDa), P₂ (3.5～10.0 kDa) and P₃ (＞10.0 kDa), which were analyzed to get the amino acid composition and infrared spectral signature. The antioxidant activity was evaluated by using DPPH, ABTS, OH reduction capacity of free radicals scavenging activity and in vitro …

Optimization Of Spray Drying Preparation And Release Property Analysis Of Onion Essential Oil Microcapsules, Wang Yueyue, Duan Xu, Ren Guangyue, Zhou Siqing

Food and Machinery

Spray drying technology was used to study the effect of different preparation conditions on the microencapsulation of onion essential oil. Taking Arabia gum and beta cyclodextrin as wall materials, the encapsulation rate as the index, the preparation process of microcapsules was optimized by response surface analysis. The content of thiosulfate (TS) in onion essential oil before and after spray drying was compared, and the extraction of onion essential oil microcapsules was also determined. The preparation technology of microcapsules was analyzed. The in vitro simulation experiment was carried out on microcapsules, and the volatilization rate of onion essential oil in microcapsules …

Antimicrobial Effects Of Bacteriocins Produced By Lactic Acid Bacteria Against Listeria On Cantaloupe (Cucumis Melo) Surface, Alvaro Gustavo Garcia Lira

LSU Master's Theses

Bacteriocins produced by lactic acid bacteria (LAB) are considered generally regarded as safe (GRAS) and may reduce pathogenic loads on the cantaloupe surface. The efficacy of these bacteriocins on reducing the pathogenic loads of Listeria was evaluated. A Cantaloupe’s netted surface provides for attachment of pathogens from soil and water, which then contaminate the surface of the cantaloupe. Non-pathogenic bacteria, Listeria innocua B-33016 was used as a surrogate for L. monocytogenes.

Two bacteriocins, (1) nisin and (2) pediocin, were produced from Lactococcus lactis subsp. lactis ATCC 11454 and Pediococcus acidilactici RS2-10, respectively. The bacteriocins were partially purified and …

Effect Of Processing On Microbiota Accessible Carbohydrates In Whole Grains, Caroline Smith

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

There is potential to increase microbiota accessible carbohydrates (MAC) in whole grains through food processing. Therefore, different processing conditions for boiling and extrusion of whole wheat flour were studied for their effect on MAC. Processing conditions had a minimal effect on fermentation response using 2 fecal samples of disparate composition. However, the processing method had an impact on the fermentation of non-digestible carbohydrates and subsequent short chain fatty acids production, but only for a microbiome with high diversity and a predominance of microbes associated with dietary fiber intake. Subsequently, five processing methods: boiling, extrusion, unleavened bread, yeast bread, and sourdough …

The Effect Of Moisture Content On Chemical Components Of Different Types Of Heat-Not-Burn Tobacco Products, Li Chaojian, Jin Yong, Zhou Chengxi, Shi Huaibin

Food and Machinery

In order to investigate the effect of moisture content on the chemical components of different types of heat-not-burn tobacco products(HNB)，cigarette A prepared using tobacco sheet by thick pulp method and cigarette B prepared using tobacco sheet by Paper making method were taken as research objects, and the correlation between moisture in cigarettes and glycerol, nicotine was studied. SEM and TG analysis were carried out. The results showed that: ① The mass contents of glycerol and nicotine in the tobacco sheet were more accurately expressed in terms of the mass content of the corresponding substances in the dry sheet. ② The …