scholarly journals Effects of Combined α-Amylase and Endo-Xylanase Treatments on the Properties of Fresh and Frozen Doughs and Final Breads

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1349
Author(s):  
Hye-Jin Kim ◽  
Sang-Ho Yoo
Keyword(s):  
American Association ◽  
Profile Analysis ◽  
Storage Period ◽  
Textural Properties ◽  
Carbohydrate Active Enzymes ◽  
Texture Profile ◽  
Yeast Viability ◽  
Bread Volume ◽  
Combined Use ◽  
Ppm Level

Frozen bread doughs usually exhibit less bread volume and poor texture due to dough weakening as well as reduced yeast viability. The objectives of this study were to improve the textural properties of frozen bread dough by applying carbohydrate-active enzymes, α-amylase and endo-xylanase. Each enzyme was applied to dough formulation at 20 (748 and 3.5 units, respectively) and 100 ppm levels of flour, and their combined treatments were also applied. Enzyme-treated doughs were kept frozen at −20 °C for 2 weeks, and then baked following the official American Association of Cereal Chemists (AACC) method. A texture profile analysis of oven-baked breads was performed at 25 °C after a 5-day storage period. α-Amylase treatment at a 100 ppm level increased the specific bread volume by 24.5% and 21.9% when compared to untreated fresh and frozen bread doughs, respectively, and decreased crumb hardness by 63.4% and 58.3%; endo-xylanase (100 ppm) also decreased crumb hardness by 56.9% and 26.9%. The combined use of α-amylase and endo-xylanase retarded bread hardening synergistically after a 5-day storage period.

scholarly journals Influence of the type of packaging on textural properties of minimally processed yellow Peruvian roots

Revista CERES ◽  
2016 ◽  
Vol 63 (3) ◽  
pp. 291-296
Author(s):  
Lara Santana Fernandes ◽  
Paulo Cesar Corrêa ◽  
Mateus da Silva Junqueira ◽  
Fernando Luiz Finger ◽  
Paulo Roberto Cecon
Keyword(s):  
Profile Analysis ◽  
Storage Period ◽  
Textural Properties ◽  
Maxwell Model ◽  
Expanded Polystyrene ◽  
Minimally Processed ◽  
Texture Profile ◽  
Generalized Maxwell Model ◽  
Force Curves ◽  
Processed Products

ABSTRACT The textural properties of minimally processed products indicate its quality, and the package is fundamental to maintain the conservation of these foods. The aim of this study was to evaluate texture alterations that occur during the storage period of minimally processed yellow Peruvian roots, using texture profile analysis (TPA) and relaxation, in function of four types of plastic packaging, combined to refrigeration. The roots were selected, sanitized, peeled and sliced. The processing continued with final sanitization, rinsing and immersion in ascorbic and citric acid solution. The slices were centrifuged and packed in expanded polystyrene trays covered with PVC film, and in high-density polyethylene bags (HDPE), polypropylene bags (PP) and multilayer polyolefin bags for vacuum, and stored at 5 ± 2 ºC and 90 ± 5% relative humidity during 12 days. For the TPA, the parameters of interest were hardness and adhesiveness, automatically calculated from the force curves (F) x time (s). For modeling the relaxation process, the generalized Maxwell model was used. The slices packed in PP and vacuum showed higher hardness and normalized force in the balance (0.7502 and 0.7580, respectively), indicating that they were more elastic, better preserving the quality during storage than slices packed in other packaging.

scholarly journals Rheological and Textural Properties of Gluten Free Cookies based on Pearl Millet and Flaxseed

2020 ◽  
Vol 10 (5) ◽  
pp. 6565-6576 ◽  
Keyword(s):  
Celiac Disease ◽  
Pearl Millet ◽  
Profile Analysis ◽  
Wheat Gluten ◽  
Textural Properties ◽  
Gluten Free ◽  
Free Products ◽  
Texture Profile ◽  
Psyllium Husk ◽  
Common Term

Gluten is common term refered to proteins found in wheat and related grains which is responsible for elasticity of dough and chewy texture of final product. But gluten causes problems to patients suffering from celiac diseases hence gluten free diet is the only existing treatment for celiac disease today. This study was conducted with an objective to create a dough system composed of pearl millet and flaxseed proteins that would be able to reproduce the same rheological and textural properties as wheat gluten in cookie making. A dough mixture comprising of pearl millet and flaxseed were used to prepare gluten free cookies. Psyllium husk was used to provide gelling property to the gluten free dough. Different dough samples with varying concentrations of flaxseed flour (i.e. 15g, 17g, 20g, and 22.5g) were prepared and thus optimized by rheological testing of dough samples. The cookies formulated from different dough samples with varying flaxseed concentrations were tested for rheological properties and texture profile analysis of the formulations was done. This study indicated that it is feasible to develop gluten free cookies as a commercial snack towards the fast and emerging need of gluten free products for the patients suffering from celiac disease.

scholarly journals THE EFFECTS OF FOLIARLY APPLIED CALCIUM ON FRUIT CALCIUM, FIRMNESS, SOLUBLE SOLIDS, STORABILITY AND ORGANOLEPTIC QUALITY OF `CRESTHAVEN' PEACH

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1147c-1147
Author(s):  
J. Anthony Hopfinger ◽  
Donald W. Shaffner ◽  
Eric D. Cubberley
Keyword(s):  
Size Distribution ◽  
Profile Analysis ◽  
Fruit Size ◽  
Storage Period ◽  
Soluble Solids ◽  
High Rate ◽  
Calcium Treatment ◽  
Crop Load ◽  
Texture Profile

Both Cacl2 and Nutrical (a trihydroxyglutarate chelate) were foliarly applied at rates of 1.8 and 5.5 Cacl2/ha/season and 1.5 and 4.5 l/ha/season, respectively. Applications were made starting at shuck split and repeated at 2 week intervals until harvest. Neither calcium treatment had an effect on fruit size and size distribution. Fruit size was directly related to crop load. Calcium chloride application had the most pronounced effect on increasing the red over-color of `Cresthaven' peaches with Nutrical intermediate compared to the control. The high rate of Nutrical increased flesh calcium levels at harvest by 75-100 PPM. Instron Texture Profile Analysis indicated that any calcium treatment significantly increased the hardness of the peach. Nutrical at 4.5 l/ha/season improved hardness 2-fold compared to the controls. The improved hardness was maintained throughout the 6 week storage period.

scholarly journals Improving of Gelling Capacity of Cooked Crab Meat Proteins

2021 ◽  
Vol 8 ◽  
Author(s):  
Gabriela Nallely Trejo-Díaz ◽  
Miguel Ángel Martínez-Maldonado ◽  
Rocío M. Uresti-Marín ◽  
Gonzalo Velazquez ◽  
José Alberto Ramírez
Keyword(s):  
Mechanical Properties ◽  
Profile Analysis ◽  
Callinectes Sapidus ◽  
Textural Properties ◽  
Texture Profile ◽  
Microbial Enzyme ◽  
Mixing Method ◽  
Crab Meat ◽  
Cooked Meat ◽  
Weak Gels

Cooked crab meat subjected to a cutting process can aggregate again, forming weak gels. The objective of this work was to determine the effect of two mixing methods, combined with the addition of the microbial enzyme TGase (MTGase) on the mechanical and functional properties of gels from washed or unwashed blue crab (Callinectes sapidus) meat. Live crabs were obtained from Laguna Madre, Tamaulipas, Mexico, and cooked at 120°C for 20 min before hand-picking the meat from the shell. Cooked meat was processed by mixing and cut at temperatures of 25 or 60°C, without (control) or 0.5% of MTGase. Then cooked at 90°C for 15 min. Changes in texture profile analysis, percentage of extractable water, and color were evaluated. The mixing method at 60°C allowed increasing the textural properties of the gels, and the addition of MTGase significantly improved the mechanical properties. The results allowed stablishing a viable technique to obtain restructured gels from cooked crab meat with no need to extract the soluble compounds responsible for their distinctive odor and taste which often affect the mechanical properties.

scholarly journals Compositional Differences Among Types of Mechanically Separated Chicken and Their Influence on Physicochemical Attributes of Frankfurter-Type Sausages

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Danika K. Miller ◽  
Laura E. Yoder ◽  
Steven M. Lonergan ◽  
Joseph G. Sebranek ◽  
Rodrigo Tarté
Keyword(s):  
Lipid Oxidation ◽  
Raw Materials ◽  
Profile Analysis ◽  
Storage Period ◽  
Thiobarbituric Acid ◽  
Chicken Breast ◽  
Thiobarbituric Acid Reactive Substances ◽  
Texture Profile ◽  
Product Formulation ◽  
Functional Attributes

Mechanically separated chicken (MSC) from 2 different separation methods (MSC1, Beehive separator, aged bones [Provisur Technologies, Mokena, IL]; MSC2, Poss separator, fresh bones [Poss Design Limited, Oakville, Ontario, Canada]) and chicken breast trim (CBT) were used as raw materials in frankfurters. Texture, color, and lipid oxidation were measured over a refrigerated storage period of 98 d. Both MSC were higher in fat and lower in moisture than CBT. MSC frankfurters had lower L* and higher a* values than CBT frankfurters, with MSC2 frankfurters having the lowest L* and highest a* (P < 0.05). Thiobarbituric acid-reactive substances values were higher in MSC1 frankfurters (P < 0.05) than in CBT and MSC2 frankfurters. Texture Profile Analysis hardness, cohesiveness, resilience, and chewiness were highest in MSC2 frankfurters. Differences among MSC resulted in detectable differences in finished product attributes, with MSC2 frankfurters being darker and redder and having lower levels of lipid oxidation than MSC1 frankfurters, underscoring the importance of understanding the specific functional attributes of MSC obtained by different processes prior to product formulation and manufacturing.

Texture of Wheat Bread Improved by α-Amylase and Glucose Oxidase

2011 ◽  
Vol 236-238 ◽  
pp. 35-38
Author(s):  
Jie Zeng ◽  
Hai Yan Gao ◽  
Lei Jin ◽  
Zhao Pei Zhang ◽  
Hui Rong Zhang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Glucose Oxidase ◽  
Profile Analysis ◽  
Textural Properties ◽  
Wheat Bread ◽  
Electron Micrograph ◽  
Scanning Electron Micrograph ◽  
Texture Profile ◽  
Scanning Electron

The effects of α-amylase and glucose oxidase as bread improvers on the textural properties of bread were evaluated by texture profile analysis and Scanning electron micrograph. It was found that α-amylase and glucose oxidase could retard the bread aging. And Scanning electron microscopy showed that wheat bread with the addition of the enzymes exhibited the microstructures with the smoother surfaces. Therefore, α-amylase and glucose oxidase could be considered as the potential texture modifier for baked food.

scholarly journals Texture Profile Analysis of Sliced Cheese in relation to Chemical Composition and Storage Temperature

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Yuanrong Zheng ◽  
Zhenmin Liu ◽  
Beihong Mo
Keyword(s):  
Chemical Composition ◽  
Storage Temperature ◽  
Profile Analysis ◽  
Textural Properties ◽  
Texture Profile Analysis ◽  
Chinese Market ◽  
Chinese Consumers ◽  
Logistic Regression Models ◽  
Texture Profile ◽  
And Storage

The quantitative relationships among chemical composition, storage temperature, and texture of cheese were not fully understood. In this study, the effects of composition and temperature on textural properties of eight common varieties of sliced cheese were examined. The textural properties of sliced cheeses, including firmness, cohesiveness, adhesiveness, springiness, chewiness, and resilience, were measured by texture profile analysis after storage at 4 and 25°C for 4 h. Multivariate logistic regression models were established to describe the quantitative relationships of textural properties (dependent variables) to chemical composition and storage temperature (independent variables) of sliced cheeses. Results showed that protein, fat, moisture, and sodium chloride contents as well as storage temperature significantly affected the texture of sliced cheeses (P<0.05). In particular, fat in the dry matter and moisture in the nonfat substances were negatively correlated with firmness of sliced cheeses (P<0.05). As storage temperature rose from 4 to 25°C, the average values of firmness, chewiness, and resilience substantially declined by 42%, 45%, and 17%, respectively (P<0.05). This study provided reference data for adjusting chemical composition and storage temperature of common cheese products to obtain favorable texture for Chinese consumers, which thereby facilitated the localization of cheese industry in Chinese market.

scholarly journals Texture Profile Analysis of Some Romanian Pasta Filata Cheese Varieties (Caciocavallo Cheese)

1970 ◽  
Vol 66 (2) ◽  
Author(s):  
Liliana TUDOREANU ◽  
Lavinia DUMITREAN
Keyword(s):  
Energy Input ◽  
Profile Analysis ◽  
Textural Properties ◽  
Texture Profile Analysis ◽  
Texture Profile ◽  
Pasta Filata

This is the fist study of the texture profile of the 6 pasta filata cheese varieties of Romanian origin. The parameters which were analyzed are: hardness during the first and second compression, cohesiveness, energy input by the instrument and returned by the sample, springiness, chewiness and resilience. It was found that the differences between the hardness of Afumat vrancea Cheese and Afumat classic are not significant. There were no significant differences between Penteleu, Dalia and Dobrogea for the first cycle hardness. The Rucăr cheese first cycle hardness was significant compared to all the cheese analyzed. The texture profile analysis is recommended as an objective characterization of the textural properties of the pasta filata cheese of Romanian origin

scholarly journals Rainbow trout (Oncorhynchus mykiss) farmed at two different temperatures: Post rigor mortis changes in function of the stunning method

2020 ◽  
Vol 65 (No. 9.) ◽  
pp. 354-364
Author(s):  
Antonella Dalle Zotte ◽  
Anna Concollato ◽  
Giulia Secci ◽  
Marco Cullere ◽  
Giuliana Parisi
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Water Temperature ◽  
Ph Value ◽  
Profile Analysis ◽  
Storage Period ◽  
Refrigerated Storage ◽  
Rigor Mortis ◽  
Texture Profile ◽  
Rainbow Trout Oncorhynchus Mykiss

Post rigor mortis changes of texture, chemical and sensory properties in rainbow trout (Oncorhynchus mykiss) reared at two different temperature conditions (8 and 12 °C) were examined to better understand how different stunning methods, i.e. electroshock (E) and asphyxia with carbon monoxide (CO), can influence their evolution during refrigerated storage. Seven days after rigor resolution (T<sub>RR</sub>7), considering ATP catabolites (K- and K1-values), the freshness remained well preserved regardless of the stunning method applied and water temperature. During refrigerated storage fillets from fish reared at 8 °C maintained significantly higher (P &lt; 0.001) pH at the day of rigor resolution (T<sub>RR</sub>0), whereas at the end of the storage time (T<sub>RR</sub>7), 8 °C-reared fish showed a significantly lower pH value (P &lt; 0.05). CO treatment was effective in ensuring a more intense red colour of the fillet and high chroma, whereas E treatment exhibited the lowest a*, b* and chroma values. The texture profile analysis showed a significant effect of the stunning method (S), water temperature (T) and S × T interaction on fillet cohesiveness. TBARS values were significantly lower (P &lt; 0.05) in fish stunned by CO when compared to E group in the first 76 h post mortem (T<sub>RR</sub>0). At the end of the storage period (T<sub>RR</sub>7), no TBARS value difference was detected between treatments. The stunning method had a relevant impact on fillet sensory traits, revealing that CO fillets were the juiciest (P &lt; 0.05) and presented the lowest saltiness (P &lt; 0.05), aroma (P &lt; 0.05) and odour (P &lt; 0.01) intensity. Rearing temperature, instead, had a moderate effect on fillet sensory traits and indicated that the water temperature of 12 °C enhanced juiciness (P &lt; 0.05) and tenderness (P &lt; 0.05) attributes. Overall results suggested that CO is a suitable stunning method for trout that, coupled with 12 °C water temperature, are able to preserve fillet freshness, enhance colorimetric characteristics which are maintained during refrigerated storage, and provide desirable sensory traits.

Optimization of the Griddling Process of Kpejigaou (a Traditional Low Fat Nutritious Cowpea Food) Using Response Surface Methodology

2010 ◽  
Vol 16 (4) ◽  
pp. 351-356
Author(s):  
E. Amonsou ◽  
E. Sakyi-Dawson ◽  
F. Saalia ◽  
S. Sefa-Dedeh ◽  
L.D. Abbey
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Regression Models ◽  
Profile Analysis ◽  
Textural Properties ◽  
Optimum Conditions ◽  
Low Fat ◽  
Texture Profile ◽  
Multiple Regression Models ◽  
Important Quality

Kpejigaou is a griddled cowpea paste product eaten mainly in West Africa. As its processing does not involve the use of fat, it has the potential of meeting consumers’ demand for healthy, low fat nutritious foods. Product texture is considered an important quality index by kpejigaou consumers. The objective of this study was to determine the optimum processing conditions of kpejigaou with respect to its textural properties. The study followed a 2 × 3 design with two processing variables each at three levels as follows: griddling temperature (130, 200, 270 °C) and time (5, 7.5 and 10 min). Texture Profile Analysis (TPA) was done on freshly processed samples. The data were fitted into multiple regression models from which the optimum griddling conditions for kpejigaou were determined. Kpejigaou processed at the optimum conditions was evaluated by untrained consumers for acceptability. Traditionally processed kpejigaou served as the control. The TPA results showed that hardness, chewiness and modulus of deformability were significantly affected by griddling conditions. Adjusted R2 for the models for hardness, chewiness and modulus of deformability were 96%, 97% and 78%, respectively. Using response surface methodology, the optimum griddling conditions for kpejigaou (for acceptable textural properties) were determined to be 170 °C for 5-6 min. The texture of optimized kpejigaou was very much liked for its higher degree of sponginess as compared to the control. It also had acceptable sensory attributes of color, taste and flavor. These findings provide the basis for the development of a process for mass production and quality assurance of kpejigaou.

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