Food Science Commons^™

Burimet Natyrore Të Antioksidantëve Dhe Rëndësia E Tyre Në Dietën Ushqimore, Hatixhe Piraj

Theses and Dissertations

Marrja e ushqimit si nga ana sasiore dhe cilësore ndikojnë në statusin e të ushqyerit,shëndetit ashtu edhe në mirëqenien e përgjithshme të individëve.Prandaj, për ruajtjen e shëndetit fizik dhe mendor, sasi të mjaftueshme të të gjithë ushqyesve thelbësorë duhet të përfshihen në dietën tonë që nga foshnjëria deri në moshën e vjetër.

Fraza ‘ne jemi çfarë hamë’ tregon me vend që përbërja e trupit tonë varet kryesisht nga dieta jonë. Asnjë ushqim i vetëm nuk është në gjendje të plotësojë të gjitha nevojat tona ushqyese. Dieta jonë duhet të jetë e ekuilibruar mirë nga pikëpamja ushqimore dhe duhet …

Application Of A Dna Mini-Barcoding System Based On The Mitochondrial Control Region For The Identification Of Raw And Processed Tuna Products, Jiahleen Roungchun

Food Science (MS) Theses

Accurate species identification methods are needed to combat tuna fraud, improve tuna stock regulation, and mitigate health risks associated with mislabeled tuna products. The objective of this study was to conduct a market survey of raw and processed tuna products using a DNA mini-barcoding system based on the mitochondrial control region (CR). A total of 80 samples of raw, dried, and canned tuna products were collected at the retail level for CR mini-barcoding analysis. The samples underwent DNA extraction, polymerase chain reaction (PCR), and DNA sequencing of the 236-bp CR mini-barcode. The resulting sequences were searched against GenBank using the …

Assessing The Efficacy Of Bacteriological Analytical Manual (Bam) Enrichment Broths For Detection Of Salmonella Spp. In Meat Analogs, Georgia Sampson

Food Science (MS) Theses

Plant-based meat alternatives are gaining popularity as the number of market options increases. However, the recent appearance of these products on the market post-dates the validation of the current approach for isolating Salmonella from meat analogs. Therefore, the objective of this study was to compare the efficacy of the currently used Bacteriological Analytical Manual (BAM) pre-enrichment broth (lactose broth) with two additional broths (universal pre-enrichment broth and buffered peptone water) for the detection of Salmonella in five plant-based burger products. Each burger product was spiked with a Salmonella serotype (S. Enteritidis or S. Agona) that has previously been linked …

The Impact Of Processing On The Content And Composition Of Bovine Milk Extracellular Vesicles, Anna Colella

Food Science (MS) Theses

Bovine milk (BM)-based formula is an alternative for many newborns who do not consume human milk. BM contains extracellular vesicles (EVs), bioactive compounds involved in intercellular communication which regulate critical developmental processes in early life. It was hypothesized that the industrial processing of raw BM affected the content and composition of BM EVs. It is critical to understand how industrial processing affects EVs in BM since changes in the content and composition may attenuate the functions of these bioactive compounds in human health. EVs from raw BM were isolated and characterized in accordance with the Minimal Information for Studies of …

Optimizing The Application Of Plasma Functionalised Water (Pfw) For Microbial Safety In Fresh-Cut Endive Processing, Uta Schnabel, Martina Balazinski, Robert Wagner, Daniela Boehm, Paula Bourke

Articles

The microbiological profiles and responses of native microflora of endive were investigated using a model process line, to establish where a defined PFW should be optimally applied to retain or improve produce microbiological quality. The PFW processes were compared with tap water and ClO₂. The antimicrobial efficacy of PFW was quantified by determining the reduction in microbial load, the microbial viability and vitality. Depending on the stage of application of PFW, up to 5 log₁₀-cycles reduction was achieved, accompanied by a reduction of metabolic activity, but not necessarily with a decrease in metabolic vitality. Multiple application …

Studies On Milling And Baking Quality And In-Vitro Protein Digestibility Of Historical And Modern Wheats, Sujun Liu

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

There is considerable controversy among the public and the scientific community about whether modern wheats are harmful for human health and responsible for the increase of Celiac disease compared with historical varieties. Therefore, the milling and baking quality, protein digestibility, and protein composition of historical and modern wheats adapted to the Great Plains of the US were evaluated in this thesis. One objective of this thesis was to determine how end-use quality of wheat changed with wheat cultivar release year. Kernel physical characteristics, milling yield, whole-wheat flour quality, flour protein content, mixing quality and baking quality of 23 hard winter …

Inulin Fermentable Fiber Ameliorates Type I Diabetes Via Il22 And Short-Chain Fatty Acids In Experimental Models, Jun Zou, Lavanya Reddivari, Zhenda Shi, Shiyu Li, Yanling Wang, Alexis Bretin, Vu L. Ngo, Michael Flythe, Michael Pellizzon, Benoit Chassaing, Andrew T. Gewirtz

Department of Food Science Faculty Publications

Nourishment of gut microbiota via consumption of fermentable fiber promotes gut health and guards against metabolic syndrome. In contrast, how dietary fiber impacts type 1 diabetes is less clear.

Effect Of Radiofrequency Assisted Thermal Processing On The Structural, Functional And Biological Properties Of Egg White Powder, Alisha Kar

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

Radiofrequency (RF) assisted thermal processing is a novel and energy-efficient method used for pasteurization, which heats the product volumetrically as opposed to traditional hot room (HR) pasteurization. RF-assisted thermal processing accelerates the heating rate of egg white powder (EWP), which has a low thermal conductivity and further affect its gelling properties. The effect of processing methods (RF and HR) due to pH and treatment temperature combination was monitored by subjecting neutral EWP (6.4 pH) to 70 and 80 ℃ and alkaline EWP (pH 9.9) samples to 70 ℃ over 0, 5, 10, 15 and 20 d. At 80 ℃ and …

Pre-Milling Interventions For Improving The Microbiological Quality Of Wheat, Shpresa Musa

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

Development of pre-milling intervention strategies to improve the microbial quality of wheat and wheat-based products is an emerging concern for the food industry. When steam tempering conditions for hard and soft wheat were applied, the microbial population associated with the grain was significantly reduced compared to controls. Further reductions were observed when acid was applied as part of the intervention which is an added benefit since the addition of a tempering solution is required for both wheat classes since the desired milling moisture cannot be reached by applying steam alone. On average, the highest reductions for hard wheat were achieved …

Effect Of The High Pressure Jet Mill Treatment On The Stability Of Oat Pulp, Huang Su-Jun, Wang Yue-Ru, Deng Li-Ping, Luo Shun-Jing, Liu Cheng-Mei

Food and Machinery

Objective: To study the effect and mechanism of the high-pressure jet mill on the stability of oat pulp, and to provide a theoretical reference for the processing of whole grain beverages. Methods: The oat pulp was processed with different pressures and high-pressure jet mills, and the morphology, instability index, particle size, and rheological properties of the storage period (30 d) were compared. Moreover the microscopic morphology (optical microscope, laser confocal scanning microscope), scanning electron microscope), soluble component content (soluble solids, soluble protein, soluble dietary fiber) were analyzed. Results: The high-pressure jet mill treatment gradually reduced the particle size, instability index, …

Effects Of High-Temperature And High-Humidity Treatment On The Properties Of The Proteins From Wheat Flour, Zhou Xiao-Ling, Li Na, Zhang Dong-Sheng

Food and Machinery

Objective: To clarify the influence of the high temperature and high humidity process on the properties of the protein in wheat. Methods: Gluten,glutenin and gliadin in wheat flour and its products were extracted after high temperature and high humidity, and its physical and chemical properties, molecular properties and ultrastructure were determined. Results: The water solubility of the protein in wheat flour and dried noodles decreases with increasing time; The water holding capacity of dried noodles gluten protein is better than that of wheat flour, and the water holding capacity of dried noodles glutenin plays a significant role; the glutenin with …

Effects Of Bacillus Velezensis Zk1 On Fleshy Tissue Of Olecranon Peach And Its Enzymatic Properties, Chen Shao-Xian, Liu Yue, Zeng Yao-Ying, Yu Qian

Food and Machinery

Objective: Studying the enzymatic characteristics of pathogens can indirectly understand the pathogenic ability of pathogens to the host under different conditions. Methods: The composition and transmission electron microscope observation of the olecranon peach infected by the strain Bacillus velezensis zk1 before and after were investigated. The effects of temperature, pH and metal ions on the enzyme activity were studied by using a single substrate induced by the production of amylase, cellulose, pectinase and xylanase in the strain. Results: After being infected by the strain, the olecranon peach tissue cells were damaged, and the contents of starch, cellulose, hemicellulose and pectin …

Correlation Between The Preparation Technology Of The Maillard Reaction Intermediates Derived From Vegetable Peptides And The Smoking Quality And Style Of Its Flavoring Cigarettes, Lei Sheng, Cui He-Ping, Yang Qian-Xu, Wang Kai, Liu Zhi-Hua, Duan Yan-Qing, Wang Jin, Zhang Xiao-Ming

Food and Machinery

Objective： Maillard reaction intermediates were prepared from the enzymatical hydrolysates of vegetable proteins. Then they were added to cigarettes to improve the smoking quality and enhance the aroma style of cigarettes. Methods: the vegetable protein such as corn protein, sunflower seed protein, wheat gluten protein and soybean protein were hydrolyzed by alkaline protease and flavourase under different conditions. The enzymatic hydrolysates were mixed with reducing sugar at a ratio of m_hydrolysates∶m_sugar=100∶15. The formation conditions of the peptide-derived Maillard intermediates were determined through the Maillard reaction performed under the stepwise increase of temperature. The intermediates prepared under …

Analysis Of Functional Composition、 Antioxidant Activity And Their Correlation In Stem, Leaf And Flower From Dendrobium Officinale, Tang Wen-Wen, Xia Jun-Li, Chen Yuan

Food and Machinery

Objective: To strengthen the comprehensive utilization of Dendrobium officinale（D. officinale） resources. Methods: The functional composition, antioxidant activity and their pearson correlation analysis of D. officinale stem, leaf and flower were studied and compared. Results: The results showed that the contents of 4 main functional components and antioxidant activity were significantly different between the stem, leaf and flower from D. officinale, the polysaccharide of leaf and flower were lower than that observed in stem: Stem（31.00%）＞Leaf（15.04%）＞Flower（8.11%）; However, compared with stem, the total flavonoid, total polyphenol and total alkaloids contents of leaf and flower were much higher. The results of DPPH, ABTS, FRAP …

Determination Of 9 Kinds Of Fatty Acids In Vegetable Oil By Hplc-Elsd, Niu Qian-Qian, Xu Xin, Zeng Xue-Ying, Zhong Hai-Yan, Xu You-Zhi

Food and Machinery

Objective： Due to the blackness of sensitivity, selectivity and fatty acid quantification of traditional methods, a new method for determining fatty acids in vegetable oils without derivation was developed. Methods: The content and types of fatty acids in vegetable oil were analyzed more accurately by high-performance liquid chromatography combined with evaporative light scattering detector, CNW^ C₁₈-WP column (4.6 mm×250 mm, 5 μm) was used. Mobile phase A was 0.1% formic acid aqueous solution, and mobile phase B was 0.1% formic acid methanol solution, using gradient elution at the flow rate of 1.0 mL/min; the temperature of the …

Determination Of 19 Antidepressants In Health Food By High-Performance Liquid Chromatography-Time-Of-Flight Mass Spectrometry, Liu Jie, Zhu Xiao-Ling, Peng Qing-Zhi, Zhou Tao-Hong, Gong Lei, Wu Wan-Qing

Food and Machinery

Objective: To establish a rapid qualitative and quantitative analysis method, HPLC-quadrupole-time-of-flight mass spectrometry was used to determine the illegal addition of 19 antidepressants in healthy food. Methods: The samples were extracted by methanol with ultrasonic extraction procedure and then separated on a reversed-phase C₁₈ column, with acetonitrile and 0.1% formic acid aqueous as the mobile phases in gradient elution mode. The target compounds were detected in electrospray positive ion, and the data were matched with the established database of precursor ion and secondary fragment accurate mass. Results: The linear range of the 19 compounds was 5~100 μg/L, and the …

Uncertainty Evaluation For The Determination Of 4 Kinds Of Sulfonamides Residues In Pork By Lc-Ms/Ms, Yan Shun-Hua, Wang Ya-Li, Xia-Yi-La· Ai-Ni

Food and Machinery

Objective: The uncertainty in determination of sulfamonomethoxine（SMM）, sulfadimethoxine（SDM）, sulfamethoxazole（SMZ） and sulfamethazine（SM₂） in pork was evaluated by using LC-MS/MS techniqne. Methods: The uncertainty caused by various factors in the whole process of determination was analyzed, including weighing, solution preparation, sample extraction and purification, apparatus measure，recovery，etc. Results: The expand uncertainties for SMM, SDM, SMZ and SM2 were 9.4, 18.1, 12.0 and 15.6 μg/kg, respectively. Conclusion: The results showed that the main sources of uncertainty arouse from the measurement repeatability, standard solution and curve fitting.

Synthesis Of Artificial Antigen And Elisa Identification Of Mouse Polyclonal Antiserum Against Clonidine Hydrochloride, Wang Yao, Cao Jin-Bo, Li Tie-Mei, Pang Xing-Hao, Hu Xiao-Fei

Food and Machinery

Objective: The aim of this study was to obtain highly sensitive and specific mouse polyclonal antiserum of Clonidine hydrochloride (CLO). Methods: Apraclonidine (ACLO), a derivative of CLO, was acted as hapten of clonidine (CLO) to synthesize immune antigen CLO-BSA and envelope antigen CLO-OVA by glutaraldehyde (GA). The coupling effect was identified by ultraviolet scanning and polyacrylamide gel electrophoresis. Then, BALB/c mice were immunized and their immunological characteristics were identified by indirect ELISA and indirect competitive ELISA. Results: The titer of polyclonal antiserum of all mice were higher than 1∶12 800, and the polyclonal antiserum of No.3 mouse has the best …

Risk Analysis Of The Acrylamide Contamination In Food, Huang Yan, Song Sheng, Xu Wen-Yang, Li Can

Food and Machinery

Objective： The acrylamide contamination in various foods was investigated to help to control the potential food safety risks. Methods: the laboratory targeted collection of 610 food samples that may be contaminated by acrylamide, involving 8 types of food such as cakes, biscuits, potato foods, puffed foods, etc., which are inspected in accordance with "Determination of Acrylamide in Foods of National Food Safety Standards" GB 5009.204—2014. Results: Acrylamide was detected in 73 samples, and the detection rate reached 12.0%. Among them, potato foods, biscuits, cakes and other foods had different degrees of acrylamide contamination, while the acrylamide contamination in potato chips …

Research On Food Packaging Design Strategy From The Perspective Of Internet Marketing, Lu Jie

Food and Machinery

Based on the analysis of online marketing, product packaging design needs to deal with a series of characteristics such as inaccessibility, inability to open, a short stay in the line of sight of consumers, and violent transportation in a virtual marketing environment, straightforward expression, and traditional symbol application are proposed. Interesting, Serialization, Interactive, Emotionalization and Safety, and other product packaging design strategies will provide designers with an idea for product packaging design in response to the network marketing environment.