Complex coacervation between flaxseed protein isolate and flaxseed gum
- Kaushik, Pratibha, Dowling, Kim, Barrow, Colin, Adhikari, Benu
- Authors: Kaushik, Pratibha , Dowling, Kim , Barrow, Colin , Adhikari, Benu
- Date: 2015
- Type: Text , Journal article
- Relation: Food Research International Vol. 72, no. (2015), p. 91-97
- Full Text:
- Reviewed:
- Description:
Flaxseed protein isolate (FPI) and flaxseed gum (FG) were extracted, and the electrostatic complexation between these two biopolymers was studied as a function of pH and FPI-to-FG ratio using turbidimetric and electrophoretic mobility (zeta potential) tests. The zeta potential values of FPI, FG, and their mixtures at the FPI-to-FG ratios of 1:1, 3:1, 5:1, 10:1, 15:1 were measured over a pH range 8.0-1.5. The alteration of the secondary structure of FPI as a function of pH was studied using circular dichroism. The proportion of a-helical structure decreased, whereas both β-sheet structure and random coil structure increased with the lowering of pH from 8.0 to 3.0. The acidic pH affected the secondary structure of FPI and the unfolding of helix conformation facilitated the complexation of FPI with FG. The optimum FPI-to-FG ratio for complex coacervation was found to be 3:1. The critical pH values associated with the formation of soluble (pHc) and insoluble (pH
Φ1 ) complexes at the optimum FPI-to-FG ratio were found to be 6.0 and 4.5, respectively. The optimum pH (pHopt ) for the optimum complex coacervation was 3.1. The instability and dissolution of FPI-FG complex coacervates started (pHΦ2 ) at pH2.1. These findings contribute to the development of FPI-FG complex coacervates as delivery vehicles for unstable albeit valuable nutrients such as omega-3 fatty acids. © 2015.
- Authors: Kaushik, Pratibha , Dowling, Kim , Barrow, Colin , Adhikari, Benu
- Date: 2015
- Type: Text , Journal article
- Relation: Food Research International Vol. 72, no. (2015), p. 91-97
- Full Text:
- Reviewed:
- Description:
Flaxseed protein isolate (FPI) and flaxseed gum (FG) were extracted, and the electrostatic complexation between these two biopolymers was studied as a function of pH and FPI-to-FG ratio using turbidimetric and electrophoretic mobility (zeta potential) tests. The zeta potential values of FPI, FG, and their mixtures at the FPI-to-FG ratios of 1:1, 3:1, 5:1, 10:1, 15:1 were measured over a pH range 8.0-1.5. The alteration of the secondary structure of FPI as a function of pH was studied using circular dichroism. The proportion of a-helical structure decreased, whereas both β-sheet structure and random coil structure increased with the lowering of pH from 8.0 to 3.0. The acidic pH affected the secondary structure of FPI and the unfolding of helix conformation facilitated the complexation of FPI with FG. The optimum FPI-to-FG ratio for complex coacervation was found to be 3:1. The critical pH values associated with the formation of soluble (pHc) and insoluble (pH
Φ1 ) complexes at the optimum FPI-to-FG ratio were found to be 6.0 and 4.5, respectively. The optimum pH (pHopt ) for the optimum complex coacervation was 3.1. The instability and dissolution of FPI-FG complex coacervates started (pHΦ2 ) at pH2.1. These findings contribute to the development of FPI-FG complex coacervates as delivery vehicles for unstable albeit valuable nutrients such as omega-3 fatty acids. © 2015.
The visual appearance of beer : A review concerning visually-determined expectations and their consequences for perception
- Van Doorn, George, Timora, Justin, Watson, Shaun, Moore, Chris, Spence, Charles
- Authors: Van Doorn, George , Timora, Justin , Watson, Shaun , Moore, Chris , Spence, Charles
- Date: 2019
- Type: Text , Journal article , Review
- Relation: Food Research International Vol. 126, no. (2019), p.
- Full Text:
- Reviewed:
- Description: This review critically evaluates the literature concerning the impact of visual appearance cues (including colour, foam, and cloudiness) on people's perception in the beer category. The authors assess both the sensory expectations that are elicited by the visual appearance of beer, and the extent to which those expectations carry-over to influence the actual tasting experience. Beer is a particularly intriguing category to study since the differing production rules in different countries mean that there is not always the same scope to modify the colour in order to meet perceived consumer demands. What is more, there is currently disagreement in the literature concerning the impact of beer colour and foam on people's expectations of beer prior to tasting, and their multisensory flavour perception on tasting. Given how much beer is consumed annually, it is surprising that more research has not been published that assesses the undoubtedly important role of visual appearance in this beverage category. Part of the reason for this may simply be that it is difficult to create consistent experimental stimuli given the rapid transition of the head of the beer post-serving. © 2019 Elsevier Ltd
- Authors: Van Doorn, George , Timora, Justin , Watson, Shaun , Moore, Chris , Spence, Charles
- Date: 2019
- Type: Text , Journal article , Review
- Relation: Food Research International Vol. 126, no. (2019), p.
- Full Text:
- Reviewed:
- Description: This review critically evaluates the literature concerning the impact of visual appearance cues (including colour, foam, and cloudiness) on people's perception in the beer category. The authors assess both the sensory expectations that are elicited by the visual appearance of beer, and the extent to which those expectations carry-over to influence the actual tasting experience. Beer is a particularly intriguing category to study since the differing production rules in different countries mean that there is not always the same scope to modify the colour in order to meet perceived consumer demands. What is more, there is currently disagreement in the literature concerning the impact of beer colour and foam on people's expectations of beer prior to tasting, and their multisensory flavour perception on tasting. Given how much beer is consumed annually, it is surprising that more research has not been published that assesses the undoubtedly important role of visual appearance in this beverage category. Part of the reason for this may simply be that it is difficult to create consistent experimental stimuli given the rapid transition of the head of the beer post-serving. © 2019 Elsevier Ltd
Fermentation and the microbial community of Japanese koji and miso : a review
- Allwood, Joanne, Wakeling, Lara, Bean, David
- Authors: Allwood, Joanne , Wakeling, Lara , Bean, David
- Date: 2021
- Type: Text , Journal article , Review
- Relation: Journal of Food Science Vol. 86, no. 6 (2021), p. 2194-2207
- Full Text:
- Reviewed:
- Description: Abstract: Miso is a well-known traditional Japanese fermented food, with a characteristic savory flavor and aroma, known predominately as the seasoning in miso soup. Miso production involves a two-stage fermentation, where first a mold, such as Aspergillus oryzae, is inoculated onto a substrate to make koji. A subsequent fermentation, this time by bacteria and yeast, occurs when the koji is added to a salt and soybean mash, with the miso left to ferment for up to 2 years. The microbial community of miso is considered essential to the development of the unique taste, texture, and nutritional profile of miso. Despite the importance of microorganisms in the production of miso, very little research has been undertaken to characterize and describe the microbial process. In this review, we provide an overview of the two-stage fermentation process, describe what is currently known about the microbial communities involved and consider any potential health benefits associated with the consumption of miso, along with food safety concerns. As the popularity of miso continues to expand globally and is produced under new environmental conditions, understanding the microbiological processes involved will assist to ensure that global production of miso is safe as well as delicious. © 2021 Institute of Food Technologists®
- Authors: Allwood, Joanne , Wakeling, Lara , Bean, David
- Date: 2021
- Type: Text , Journal article , Review
- Relation: Journal of Food Science Vol. 86, no. 6 (2021), p. 2194-2207
- Full Text:
- Reviewed:
- Description: Abstract: Miso is a well-known traditional Japanese fermented food, with a characteristic savory flavor and aroma, known predominately as the seasoning in miso soup. Miso production involves a two-stage fermentation, where first a mold, such as Aspergillus oryzae, is inoculated onto a substrate to make koji. A subsequent fermentation, this time by bacteria and yeast, occurs when the koji is added to a salt and soybean mash, with the miso left to ferment for up to 2 years. The microbial community of miso is considered essential to the development of the unique taste, texture, and nutritional profile of miso. Despite the importance of microorganisms in the production of miso, very little research has been undertaken to characterize and describe the microbial process. In this review, we provide an overview of the two-stage fermentation process, describe what is currently known about the microbial communities involved and consider any potential health benefits associated with the consumption of miso, along with food safety concerns. As the popularity of miso continues to expand globally and is produced under new environmental conditions, understanding the microbiological processes involved will assist to ensure that global production of miso is safe as well as delicious. © 2021 Institute of Food Technologists®
Decade of Medicare : The contribution of private practice dietitians to chronic disease management and diabetes group services
- Authors: Cant, Robyn , Ball, Lauren
- Date: 2015
- Type: Text , Journal article
- Relation: Nutrition and Dietetics Vol. 72, no. 3 (2015), p. 284-290
- Full Text:
- Reviewed:
- Description: Aim: To review changes in utilisation of dietetics services through the Medicare Chronic Disease Management program over the last decade and describe patient uptake in 2013. Methods: Dietetics service data were extracted from published Medicare statistics for the periods (i) January 2004 to December 2013 and (ii) January to December 2013. Data comprised individual dietetics services by state and patient demography, and group services data for provider professions regarding type 2 diabetes: dietitians, diabetes educators and exercise physiologists. t-test was used to investigate the association of dietetics' individual service utilisation and workforce statistics. Results: Individual dietetics Chronic Disease Management consultations in private practice have increased annually since 2004. Dietetics has remained the third largest provider. In 2013, a total of 302910 individual consultations were conducted; 7% of allied health consultations. Likewise, individual services for Indigenous Australians increased since 2008. Utilisation of group services for type 2 diabetes comprised <2% of dietetics services. Dietitians provided more group services than diabetes educators but considerably fewer than exercise physiologists. Middle-aged and older patients were common, with highest uptake by those aged 55-74 years. Overall, total and per capita utilisation rates were considerably higher in NSW, Victoria and Queensland compared to less populous states, although this disparity has reduced since 2010. Conclusions: As 10 years has elapsed since the program's inception, further evaluation of the policy is needed to examine large variations in dietetics' Chronic Disease Management uptake by state and territory in both individual and group services. © 2015 Dietitians Association of Australia.
- Authors: Cant, Robyn , Ball, Lauren
- Date: 2015
- Type: Text , Journal article
- Relation: Nutrition and Dietetics Vol. 72, no. 3 (2015), p. 284-290
- Full Text:
- Reviewed:
- Description: Aim: To review changes in utilisation of dietetics services through the Medicare Chronic Disease Management program over the last decade and describe patient uptake in 2013. Methods: Dietetics service data were extracted from published Medicare statistics for the periods (i) January 2004 to December 2013 and (ii) January to December 2013. Data comprised individual dietetics services by state and patient demography, and group services data for provider professions regarding type 2 diabetes: dietitians, diabetes educators and exercise physiologists. t-test was used to investigate the association of dietetics' individual service utilisation and workforce statistics. Results: Individual dietetics Chronic Disease Management consultations in private practice have increased annually since 2004. Dietetics has remained the third largest provider. In 2013, a total of 302910 individual consultations were conducted; 7% of allied health consultations. Likewise, individual services for Indigenous Australians increased since 2008. Utilisation of group services for type 2 diabetes comprised <2% of dietetics services. Dietitians provided more group services than diabetes educators but considerably fewer than exercise physiologists. Middle-aged and older patients were common, with highest uptake by those aged 55-74 years. Overall, total and per capita utilisation rates were considerably higher in NSW, Victoria and Queensland compared to less populous states, although this disparity has reduced since 2010. Conclusions: As 10 years has elapsed since the program's inception, further evaluation of the policy is needed to examine large variations in dietetics' Chronic Disease Management uptake by state and territory in both individual and group services. © 2015 Dietitians Association of Australia.
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