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Ali AH, Alsalmi M, Alshamsi R, Tarique M, Bamigbade G, Zahid I, Nazir MH, Waseem M, Abu-Jdayil B, Kamal-Eldin A, Huppertz T, Ayyash M. Effect of whey protein isolate addition on set-type camel milk yogurt: Rheological properties and biological activities of the bioaccessible fraction. J Dairy Sci 2023; 106:8221-8238. [PMID: 37641311 DOI: 10.3168/jds.2023-23421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Accepted: 05/18/2023] [Indexed: 08/31/2023]
Abstract
The manufacture of camel milk (CM) yogurt has been associated with several challenges, such as the weak structure and watery texture, thereby decreasing its acceptability. Therefore, this study aimed to investigate the effect of whey protein isolate (WPI) addition on the health-promoting benefits, texture profile, and rheological properties of CM yogurt after 1 and 15 d of storage. Yogurt was prepared from CM supplemented with 0, 3, and 5% of WPI and compared with bovine milk yogurt. The results show that the water holding capacity was affected by WPI addition representing 31.3%, 56.8%, 64.7%, and 45.1% for yogurt from CM containing 0, 3 or 5% WPI, and bovine milk yogurt, respectively, after 15 d. The addition of WPI increased yogurt hardness, adhesiveness, and decreased the resilience. CM yogurt without WPI showed lower apparent viscosity, storage modulus, and loss modulus values compared with other samples. The supplementation of CM with WPI improved the rheological properties of the obtained yogurt. Furthermore, the antioxidant activities of yogurt before and after in vitro digestion varied among yogurt treatments, which significantly increased after digestion except the superoxide anion scavenging and lipid oxidation inhibition. After in vitro digestion at d 1, the superoxide anion scavenging of the 4 yogurt treatments respectively decreased from 83.7%, 83.0%, 79.1%, and 87.4% to 36.7%, 38.3%, 44.6%, and 41.3%. The inhibition of α-amylase and α-glucosidase, angiotensin-converting enzyme inhibition, cholesterol removal, and degree of hydrolysis exhibited different values before and after in vitro digestion.
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Affiliation(s)
- Abdelmoneim H Ali
- Department of Food Science, Faculty of Agriculture, Zagazig University, Zagazig, 44511, Egypt
| | - Maitha Alsalmi
- Department of Food Science, College of Agriculture and Veterinary Medicine, United Arab Emirates University (UAEU), Al Ain 15551, UAE
| | - Rodah Alshamsi
- Department of Food Science, College of Agriculture and Veterinary Medicine, United Arab Emirates University (UAEU), Al Ain 15551, UAE
| | - Mohammed Tarique
- Department of Food Science, College of Agriculture and Veterinary Medicine, United Arab Emirates University (UAEU), Al Ain 15551, UAE
| | - Gafar Bamigbade
- Department of Food Science, College of Agriculture and Veterinary Medicine, United Arab Emirates University (UAEU), Al Ain 15551, UAE
| | - Imtisal Zahid
- Department of Chemical and Petroleum Engineering, College of Engineering, United Arab Emirates University (UAEU), Al Ain 15551, UAE
| | - Muhammad Hamza Nazir
- Department of Chemical and Petroleum Engineering, College of Engineering, United Arab Emirates University (UAEU), Al Ain 15551, UAE
| | - Muhammad Waseem
- Department of Chemical and Petroleum Engineering, College of Engineering, United Arab Emirates University (UAEU), Al Ain 15551, UAE
| | - Basim Abu-Jdayil
- Department of Chemical and Petroleum Engineering, College of Engineering, United Arab Emirates University (UAEU), Al Ain 15551, UAE
| | - Afaf Kamal-Eldin
- Department of Food Science, College of Agriculture and Veterinary Medicine, United Arab Emirates University (UAEU), Al Ain 15551, UAE
| | - Thom Huppertz
- FrieslandCampina, Amersfoort 1551 3800 BN, the Netherlands; Wageningen University & Research, Wageningen 6708 PB, the Netherlands
| | - Mutamed Ayyash
- Department of Food Science, College of Agriculture and Veterinary Medicine, United Arab Emirates University (UAEU), Al Ain 15551, UAE.
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The effect of acidification temperature and pH on intermolecular protein bonds and water mobility in heat and acid-induced milk gels. Int Dairy J 2023. [DOI: 10.1016/j.idairyj.2023.105611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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3
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Discriminating between different proteins in the microstructure of acidified milk gels by super-resolution microscopy. Food Hydrocoll 2023. [DOI: 10.1016/j.foodhyd.2023.108468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Wilbanks DJ, Yazdi SR, Lucey JA. Effects of varying casein and pectin concentrations on the rheology of high-protein cultured milk beverages stored at ambient temperature. J Dairy Sci 2021; 105:72-82. [PMID: 34756437 DOI: 10.3168/jds.2021-20597] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 09/10/2021] [Indexed: 11/19/2022]
Abstract
Shelf-stable cultured milk beverages that have high protein levels can be difficult to successfully manufacture. With increasing protein level, rapid phase separation and gel formation occur in cultured beverages, which may not be prevented even with the inclusion of stabilizers such as high methoxy (HM) pectin. To limit protein aggregation in cultured milk beverages we investigated micellar casein as an interesting alternative to milk, due to the absence of whey proteins, which can contribute to increased gel strength in cultured products. In this study, micellar casein dispersed in ultrafiltered milk permeate was fermented to pH 4.1, blended with HM pectin, homogenized, thermally processed, and bottled for storage at ambient temperature for 6 mo. Utilizing response surface methodology with a central composite rotatable design, the protein and pectin contents were varied between 5 and 9% and 0.0 and 1.0%, respectively. The elastic modulus, loss tangent, and yield stress of these beverages were measured during storage to observe the extent of bond restructuring, whereas particle size and visual phase separation were measured to determine stability. Response variables were measured initially after thermally processing the beverages, and after 1 and 6 mo of storage at ambient temperature. All samples quickly formed gels after homogenizing, regardless of the pectin level. The stiffness (elastic modulus) of all samples increased throughout storage and was determined mainly by the protein content; however, the growth of elastic bonds over time was slowed with high levels of pectin. At 6 mo of storage, yield stress values were significantly lower for beverages with <7.5% protein when they were stabilized with ≥0.85% pectin. Prediction models for visual phase separation in beverages stored for 6 mo were significantly affected by the protein content, with increasing instability at lower protein levels. Models were used to identify optimal protein (<7.5%) and pectin (≥0.85%) concentrations to minimize the stiffness of gels during ambient storage. Samples in this optimized region were predicted to have low yield stress values and were easily fluidized by gentle shaking of the bottle at 6 mo.
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Affiliation(s)
- D J Wilbanks
- Department of Food Science, University of Wisconsin, Madison 53706.
| | | | - J A Lucey
- Department of Food Science, University of Wisconsin, Madison 53706; Center for Dairy Research, University of Wisconsin, Madison 53706
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Barone G, Yazdi SR, Lillevang SK, Ahrné L. Calcium: A comprehensive review on quantification, interaction with milk proteins and implications for processing of dairy products. Compr Rev Food Sci Food Saf 2021; 20:5616-5640. [PMID: 34622552 DOI: 10.1111/1541-4337.12844] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 09/01/2021] [Accepted: 09/02/2021] [Indexed: 12/22/2022]
Abstract
Calcium (Ca) is a key micronutrient of high relevance for human nutrition that also influences the texture and taste of dairy products and their processability. In bovine milk, Ca is presented in several speciation forms, such as complexed with other milk components or free as ionic calcium while being distributed between colloidal and serum phases of milk. Partitioning of Ca between these phases is highly dynamic and influenced by factors, such as temperature, ionic strength, pH, and milk composition. Processing steps used during the manufacture of dairy products, such as preconditioning, concentration, acidification, salting, cooling, and heating, all contribute to modify Ca speciation and partition, thereby influencing product functionality, product yield, and fouling of equipment. This review aims to provide a comprehensive understanding of the influence of Ca partition on dairy products properties to support the development of kinetics models to reduce product losses and develop added-value products with improved functionality. To achieve this objective, approaches to separate milk phases, analytical approaches to determine Ca partition and speciation, the role of Ca on protein-protein interactions, and their influence on processing of dairy products are discussed.
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Affiliation(s)
- Giovanni Barone
- Department of Food Science, Ingredients and Dairy Technology, University of Copenhagen, Frederiksberg, Denmark
| | | | | | - Lilia Ahrné
- Department of Food Science, Ingredients and Dairy Technology, University of Copenhagen, Frederiksberg, Denmark
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Asaduzzaman M, Mahomud MS, Haque ME. Heat-Induced Interaction of Milk Proteins: Impact on Yoghurt Structure. INTERNATIONAL JOURNAL OF FOOD SCIENCE 2021; 2021:5569917. [PMID: 34604378 PMCID: PMC8483934 DOI: 10.1155/2021/5569917] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 08/16/2021] [Accepted: 09/11/2021] [Indexed: 12/03/2022]
Abstract
Heating milk for yoghurt preparation has a significant effect on the structural properties of yoghurt. Milk heated at elevated temperature causes denaturation of whey protein, aggregation, and some case gelation. It is important to understand the mechanism involved in each state of stabilization for tailoring the final product. We review the formation of these complexes and their consequence on the physical, rheological, and microstructural properties of acid milk gels. To investigate the interactions between denatured whey protein and casein, the formation of covalent and noncovalent bonds, localization of the complexes, and their impact on ultimate gelation and final yoghurt texture are reviewed. The information regarding this fundamental mechanism will be beneficial to develop uniform quality yoghurt texture and potential interest of future research.
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Affiliation(s)
- Md Asaduzzaman
- Faculty of Science and Technology, Free University of Bolzano, Piazza Università 1, 39100 Bolzano, Italy
| | - Md Sultan Mahomud
- Department of Food Engineering and Technology, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, Bangladesh
| | - Mohammod Enamul Haque
- Department of Animal Nutrition, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh
- Bangladesh Milk Producers' Cooperative Union Ltd., Dhaka 1216, Bangladesh
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Singh R, Amamcharla JK. Effect of pH on heat-induced interactions in high-protein milk dispersions and application of fluorescence spectroscopy in characterizing these changes. J Dairy Sci 2021; 104:3899-3915. [PMID: 33612213 DOI: 10.3168/jds.2020-19304] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 11/16/2020] [Indexed: 11/19/2022]
Abstract
This study investigated casein-whey protein interactions in high-protein milk dispersions (5% protein wt/wt) during heating at 90°C for 1.5 to 7.5 min at 3 different pH of 6.5, 6.8, and 7.0, using both conventional methods (gel electrophoresis, physicochemical properties) and fluorescence spectroscopy. Conventional methods confirmed the presence of milk protein aggregates during heating, similar to skim milk. These methods were able to help in understanding the denaturation and aggregation of milk proteins as a function of heat treatment. However, the results from the conventional methods were greatly affected by batch-to-batch variations and, therefore, differentiation could be drawn only in nonheated samples and samples heated for a longer duration. The front-face fluorescence spectroscopy was found to be a useful tool that provided additional information to conventional methods and helped in understanding differences between nonheated, low-, and high-heated samples, along with the type of sample used (derived from liquid or powder milk protein concentrates). At all pH values, tryptophan maxima in nonheated samples derived from powdered milk protein concentrates presented a blue shift in comparison to samples derived from liquid milk protein concentrates, and tryptophan maxima in heated samples presented a red shift. With the heating of the sample, Maillard emission and excitation spectra also showed increases in the peak intensities from 408 to 432 and 260 to 290 nm, respectively. As the level of denaturation increased with heating, a marked differentiation can be seen in the principal component analysis plots of tryptophan, Maillard emission, and excitation spectra, indicating that the front-face fluorescence technique has a potential to monitor and classify samples according to milk protein interactions as a function of pH and heat exposure. Overall, it can be said that the pattern of protein-protein interactions in high-protein dispersions was similar to the observation reported in skim milk systems, and fluorescence spectroscopy with chemometrics can be used as a rapid, nondestructive, and complementary method to conventional methods for following heat-induced changes.
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Affiliation(s)
- Richa Singh
- Department of Animal Sciences and Industry, Food Science Institute, Kansas State University, Manhattan 66506; ICAR-National Dairy Research Institute, Karnal-132001, Haryana, India
| | - J K Amamcharla
- Department of Animal Sciences and Industry, Food Science Institute, Kansas State University, Manhattan 66506.
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9
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Ningtyas DW, Hati S, Prakash S. Bioconversion and bioaccessibility of isoflavones from sogurt during in vitro digestion. Food Chem 2020; 343:128553. [PMID: 33176956 DOI: 10.1016/j.foodchem.2020.128553] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 10/28/2020] [Accepted: 10/31/2020] [Indexed: 01/14/2023]
Abstract
This study investigated the bioconversion and bioaccessibility of soy isoflavones produced in sogurt fermented with S. thermophilus and L. bulgaricus during in vitro digestion. The highest survivability of S. thermophilus (6.49 log cfu/mL) and L. bulgaricus (6.48 log cfu/mL) was in oral phase. In gastric phase, the total aglycones of sogurt (26.73 g/L) increased up to 20 times than control (1.21 g/L), with a significant increase in daidzein (17.05 g/L) and genistein (9.68 g/L). Addition of 8U of β-glucosidase into soymilk significantly increased the conversion of isoflavone in ENTII (daidzein: 0.46 g/L; genistein: 0.18 g/L) than in ENTI (daidzein: 0.33 g/L; genistein: 0.20 g/L). The particle size analysis and confocal micrographs of digesta also suggest the size of fat and protein in gastric phase to be smaller than in intestinal phase. The results indicate the prospective to develop soy-based fermented products capable of releasing high isoflavone in the digestive system.
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Affiliation(s)
- Dian Widya Ningtyas
- Department of Food Science and Technology, Faculty of Agricultural Technology, Brawijaya University, Jl. Veteran, Malang 65145, Indonesia; School of Agriculture and Food Sciences, The University of Queensland, St. Lucia, Queensland 4072, Australia
| | - Subrota Hati
- Dairy Microbiology Department, SMC College of Dairy Science, Anand Agricultural University, Anand 388110, Gujarat, India
| | - Sangeeta Prakash
- School of Agriculture and Food Sciences, The University of Queensland, St. Lucia, Queensland 4072, Australia.
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10
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Kamal-Eldin A, Alhammadi A, Gharsallaoui A, Hamed F, Ghnimi S. Physicochemical, rheological, and micro-structural properties of yogurts produced from mixtures of camel and bovine milks. NFS JOURNAL 2020. [DOI: 10.1016/j.nfs.2020.05.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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11
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Gélébart P, Riaublanc A, Famelart MH, Jonchère C, Beaumal V, Anton M, Garnier C. Protein aggregates modulate the texture of emulsified and acidified acid milk gels. Food Hydrocoll 2019. [DOI: 10.1016/j.foodhyd.2019.02.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Torres IC, Amigo JM, Knudsen JC, Tolkach A, Mikkelsen BØ, Ipsen R. Rheology and microstructure of low-fat yoghurt produced with whey protein microparticles as fat replacer. Int Dairy J 2018. [DOI: 10.1016/j.idairyj.2018.01.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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13
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Effect of micellar κ-casein dissociation on the formation of soluble protein complexes and acid gel properties. Lebensm Wiss Technol 2018. [DOI: 10.1016/j.lwt.2017.10.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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14
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15
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Liu G, Buldo P, Greve MT, Nielsen SB, Nielsen JH, Ipsen R. Effects of added whey protein aggregates on textural and microstructural properties of acidified milk model systems. Int Dairy J 2016. [DOI: 10.1016/j.idairyj.2016.07.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Hou X, Sun M, He X, Chen L, Zhang P, He L. Simultaneous quantification of five proteins and seven additives in dairy products with a heart-cutting two-dimensional liquid chromatography method. J Sep Sci 2015; 38:3832-3838. [DOI: 10.1002/jssc.201500684] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Revised: 08/25/2015] [Accepted: 08/26/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Xiaofang Hou
- School of Pharmacy; Xi'an Jiaotong University; Xi'an China
| | - Meng Sun
- School of Pharmacy; Xi'an Jiaotong University; Xi'an China
| | - Xiaoshuang He
- School of Pharmacy; Xi'an Jiaotong University; Xi'an China
| | - Liang Chen
- School of Pharmacy; Xi'an Jiaotong University; Xi'an China
| | - Ping Zhang
- School of Pharmacy; Xi'an Jiaotong University; Xi'an China
| | - Langchong He
- School of Pharmacy; Xi'an Jiaotong University; Xi'an China
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17
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Ozcan T, Horne DS, Lucey JA. Yogurt made from milk heated at different pH values. J Dairy Sci 2015; 98:6749-58. [DOI: 10.3168/jds.2015-9643] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2015] [Accepted: 06/15/2015] [Indexed: 11/19/2022]
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18
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Andoyo R, Guyomarc'h F, Burel A, Famelart MH. Spatial arrangement of casein micelles and whey protein aggregate in acid gels: Insight on mechanisms. Food Hydrocoll 2015. [DOI: 10.1016/j.foodhyd.2015.04.031] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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19
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Reassociation of dissociated caseins upon acidification of heated pH-adjusted skim milk. Food Chem 2015; 174:339-47. [DOI: 10.1016/j.foodchem.2014.11.054] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Revised: 11/07/2014] [Accepted: 11/09/2014] [Indexed: 11/23/2022]
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20
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Comparative Study on High-Intensity Ultrasound and Pressure Milk Homogenization: Effect on the Kinetics of Yogurt Fermentation Process. FOOD BIOPROCESS TECH 2014. [DOI: 10.1007/s11947-014-1412-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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21
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Shanmugam A, Ashokkumar M. Functional properties of ultrasonically generated flaxseed oil-dairy emulsions. ULTRASONICS SONOCHEMISTRY 2014; 21:1649-57. [PMID: 24713146 DOI: 10.1016/j.ultsonch.2014.03.020] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2014] [Revised: 03/19/2014] [Accepted: 03/19/2014] [Indexed: 05/09/2023]
Abstract
This study reports on the functional properties of 7% flaxseed oil/milk emulsion obtained by sonication (OM) using 20 kHz ultrasound (US) at 176 W for 1-8 min in two different delivery formulae, viz., ready-to-drink (RTD) and lactic acid gel. The RTD emulsions showed no change in viscosity after sonication for up to 8 min followed by storage up to a minimum of 9 days at 4±2 °C. Similarly, the oxidative stability of the RTD emulsion was studied by measuring the conjugated diene hydroperoxides (CD). The CD was unaffected after 8 min of ultrasonic processing. The safety aspect of US processing was evaluated by measuring the formation of CD at different power levels. The functional properties of OM gels were evaluated by small and large scale deformation studies. The sonication process improved the gelation characteristics, viz., decreased gelation time, increased elastic nature, decreased syneresis and increased gel strength. The presence of finer sono-emulsified oil globules, stabilized by partially denatured whey proteins, contributed to the improvements in the gel structure in comparison to sonicated and unsonicated pasteurized homogenized skim milk (PHSM) gels. A sono-emulsification process of 5 min followed by gelation for about 11 min can produce gels of highest textural attibutes.
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Affiliation(s)
- Akalya Shanmugam
- School of Chemistry, University of Melbourne, Victoria 3010, Australia
| | - Muthupandian Ashokkumar
- School of Chemistry, University of Melbourne, Victoria 3010, Australia; Adjunct Professor, Chemistry Department, King Abdulaziz University, Jeddah, Saudi Arabia.
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22
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Chever S, Guyomarc'h F, Beaucher E, Famelart M. High-protein fat-free acid milk gels: Control of protein composition and heat treatment. Int Dairy J 2014. [DOI: 10.1016/j.idairyj.2014.02.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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23
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Model mixtures evidence the respective roles of whey protein particles and casein micelles during acid gelation. Food Hydrocoll 2014. [DOI: 10.1016/j.foodhyd.2013.10.019] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Coutouly A, Riaublanc A, Axelos M, Gaucher I. Effect of heat treatment, final pH of acidification, and homogenization pressure on the texture properties of cream cheese. ACTA ACUST UNITED AC 2013. [DOI: 10.1007/s13594-013-0148-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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25
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Ingrassia R, Costa JP, Hidalgo ME, Mancilla Canales M, Castellini H, Riquelme B, Risso P. Application of a digital image procedure to evaluate microstructure of caseinate and soy protein acid gels. Lebensm Wiss Technol 2013. [DOI: 10.1016/j.lwt.2013.01.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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26
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Nguyen NH, Wong M, Havea P, Guyomarc’h F, Anema SG. The protein interactions and rheological properties of skim milk heated in the presence of low levels of reducing agent. Food Chem 2013; 138:1604-9. [DOI: 10.1016/j.foodchem.2012.10.071] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2012] [Revised: 09/28/2012] [Accepted: 10/02/2012] [Indexed: 10/27/2022]
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27
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Morand M, Dekkari A, Guyomarc'h F, Famelart MH. Increasing the hydrophobicity of the heat-induced whey protein complexes improves the acid gelation of skim milk. Int Dairy J 2012. [DOI: 10.1016/j.idairyj.2012.03.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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28
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Chemical modifications of casein occurring during industrial manufacturing of milk protein powders. Eur Food Res Technol 2012. [DOI: 10.1007/s00217-012-1760-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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29
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Nguyen NHA, Wong M, Anema SG, Havea P, Guyomarc'h F. Effects of adding low levels of a disulfide reducing agent on the disulfide interactions of β-lactoglobulin and κ-casein in skim milk. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:2337-2342. [PMID: 22296036 DOI: 10.1021/jf205297p] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Low concentrations of a disulfide reducing agent were added to unheated and heated (80 °C for 30 min) skim milk, with and without added whey protein. The reduction of the β-lactoglobulin and κ-casein disulfide bonds was monitored over time using electrophoresis. The distribution of the proteins between the colloidal and serum phases was also investigated. κ-Casein disulfide bonds were reduced in preference to those of β-lactoglobulin in both unheated and heated skim milk (with or without added whey protein). In addition, in heated skim milk, while the serum κ-casein was reduced more readily than the colloidal κ-casein, the distribution of κ-casein between the two phases was not affected.
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Affiliation(s)
- Nguyen H A Nguyen
- Institute of Food, Nutrition and Human Health, Massey University, Albany, North Shore Mail Centre, Auckland, New Zealand
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30
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Pan D, Cao J, Wang L, Zeng X. The influence of additives on properties of heat-induced gels from salt-soluble proteins extracted from goose. Int J Food Sci Technol 2011. [DOI: 10.1111/j.1365-2621.2011.02822.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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31
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Salvatore E, Pirisi A, Corredig M. Gelation properties of casein micelles during combined renneting and bacterial fermentation: Effect of concentration by ultrafiltration. Int Dairy J 2011. [DOI: 10.1016/j.idairyj.2011.05.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Morand M, Guyomarc’h F, Pezennec S, Famelart MH. On how κ-casein affects the interactions between the heat-induced whey protein/κ-casein complexes and the casein micelles during the acid gelation of skim milk. Int Dairy J 2011. [DOI: 10.1016/j.idairyj.2011.01.012] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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How to tailor heat-induced whey protein/κ-casein complexes as a means to investigate the acid gelation of milk—a review. ACTA ACUST UNITED AC 2011. [DOI: 10.1007/s13594-011-0013-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Kehoe JJ, Foegeding EA. Interaction between β-casein and whey proteins as a function of pH and salt concentration. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:349-355. [PMID: 21133408 DOI: 10.1021/jf103371g] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The effectiveness of β-casein as a chaperone in the aggregation of whey proteins was investigated. β-Casein altered heat-induced aggregation as shown by a reduction in turbidity of β-lactoglobulin, α-lactalbumin, and bovine serum albumin (BSA) solutions. The pH of the mixtures greatly affected how much β-casein reduced the turbidity of the solutions; the maximum reductions in turbidity were observed at pH 6.0. Reducing the pH decreased the effectiveness of β-casein as a chaperone. An increase in ionic strength by the addition of NaCl or CaCl(2) also decreased the effectiveness of the chaperone. The addition of CaCl(2) had a larger effect than the addition of NaCl. The chaperone effect was seen at temperatures up to 145 °C. Differential scanning calorimetry (DSC) showed that β-casein did not alter the denaturation temperature of β-lactoglobulin. The kinetics curves for loss of native protein and turbidity development showed that β-casein did not function by slowing the aggregation process. It was concluded that β-casein competes with whey protein in the aggregate process and the aggregates formed in the presence of β-casein are smaller in size than those formed during whey protein self-aggregation. The formation of smaller aggregates gives rise to less turbid, more soluble protein solutions.
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Affiliation(s)
- J J Kehoe
- Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, Raleigh, North Carolina 27695-7624, USA
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Influence of Cross-linked Waxy Maize Starch on the Aggregation Behavior of Casein Micelles During Acid-induced Gelation. FOOD BIOPHYS 2010. [DOI: 10.1007/s11483-010-9164-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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