1
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Neofytos DD, Gregersen SB, Andersen U, Corredig M. In situ single-droplet analysis of emulsified fat using confocal Raman microscopy: insights into crystal network formation within spatial resolution. SOFT MATTER 2024; 20:5675-5686. [PMID: 38690673 DOI: 10.1039/d4sm00194j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Fat crystallization is one of the predominant factors influencing the structure and properties of fat-containing emulsions. In the present study, the role of emulsifiers on fat crystallization dynamics within droplet multiphase systems was evaluated via single-droplet analysis, taking advantage of the non-destructive properties of confocal Raman microscopy. Palm oil droplets dispersed in water were used as a model system, due to palm oil's well-known crystallization properties. Emulsion droplets of the same size were generated using two different emulsifiers (Whey Protein Isolate and Tween 60), at various concentrations. Fast and slow cooling treatments were applied to affect fat crystallisation and network formation as well as droplet morphology, and crystallization dynamics. Raman imaging analysis demonstrated that the chemical structure and concentration of the emulsifier significantly influenced both crystal nucleation within the droplets, as well as the spatial distribution and morphology of the fat crystal network. Additionally, analysis of the spectra of the crystallized phase provided essential information regarding the impact of the emulsifiers on the microstructure, degree of structural order, and structural arrangements of the fat crystal networks. Furthermore, by performing single droplet analysis during cooling it was possible to observe shape distortions in Tween 60 stabilized droplets, as a consequence of the formation of a three-dimensional network of fat crystals that strongly interacted with the interface. On the other hand, the droplets retained their shape when whey proteins were absorbed at the interface. Confocal Raman microscopy, in combination with polarized light microscopy, is, therefore, a well-suited tool for in situ, single-droplet analysis of emulsified oil systems, providing essential information about emulsified fat crystallization dynamics, contributing to better understanding and designing products with enhanced structure and function.
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Affiliation(s)
- Dionysios D Neofytos
- Department of Food Science, Aarhus University, Agro Food Park 48, 8200 Aarhus, Denmark.
| | | | - Ulf Andersen
- Arla Innovation Centre, Arla Foods, Agro Food Park 19, 8200 Aarhus, Denmark
| | - Milena Corredig
- Department of Food Science, Aarhus University, Agro Food Park 48, 8200 Aarhus, Denmark.
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2
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MacWilliams SV, Clulow AJ, Gillies G, Beattie DA, Krasowska M. Recent advances in studying crystallisation of mono- and di-glycerides at oil-water interfaces. Adv Colloid Interface Sci 2024; 326:103138. [PMID: 38522289 DOI: 10.1016/j.cis.2024.103138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 03/19/2024] [Accepted: 03/20/2024] [Indexed: 03/26/2024]
Abstract
This review focuses on the current understanding regarding lipid crystallisation at oil-water interfaces. The main aspects of crystallisation in bulk lipids will be introduced, allowing for a more comprehensive overview of the crystallisation processes within emulsions. Additionally, the properties of an emulsion and the impact of lipid crystallisation on emulsion stability will be discussed. The effect of different emulsifiers on lipid crystallisation at oil-water interfaces will also be reviewed, however, this will be limited to their impact on the interfacial crystallisation of monoglycerides and diglycerides. The final part of the review highlights the recent methodologies used to study crystallisation at oil-water interfaces.
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Affiliation(s)
- Stephanie V MacWilliams
- Future Industries Institute, UniSA STEM, University of South Australia, Mawson Lakes Campus, Mawson Lakes, SA 5095, Australia.
| | - Andrew J Clulow
- Australian Synchrotron, ANSTO, 800 Blackburn Road, Clayton, VIC 3168, Australia
| | - Graeme Gillies
- Fonterra Research and Development Centre, Dairy Farm Road, Fitzherbert, Palmerston North 4442, New Zealand
| | - David A Beattie
- Future Industries Institute, UniSA STEM, University of South Australia, Mawson Lakes Campus, Mawson Lakes, SA 5095, Australia
| | - Marta Krasowska
- Future Industries Institute, UniSA STEM, University of South Australia, Mawson Lakes Campus, Mawson Lakes, SA 5095, Australia.
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3
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Povey MJ, Hefft DI. Characterising the mechanical properties of soft solids through acoustics and rheology, exemplified by anhydrous milk fat. SOFT MATTER 2023; 19:8349-8359. [PMID: 37873654 DOI: 10.1039/d3sm01097j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
Foods vary in their elastic properties over a wide range of behaviours. In the case of mastication, textures vary from hard solid through brittle (chocolate bar) and crispy/crunchy (biscuits) to viscous and extensional flow (syrup) and finally very low viscosity fluid (water). Here we deploy an elastic description of soft solids which embraces all these behaviours to quantify the elastic behaviour of food, in particular through the use of sound. We illustrate the use of this mathematical description in the quantitative characterisation of the elastic and flow properties of food through orthodox measurement techniques and novel ultrasound methods. Measurement is complicated by human sensory capabilities that span the entire range from solid to fluid to gas in an integrated manner, during the appreciation of food. We use acoustic and rheological measurement techniques for the determination of the mechanical properties of soft solids, comparing oscillatory rheometry with acoustic parameters as exemplified by acoustic and oscillatory rheometry measurements in crystallising anhydrous milk fat (AMF). We conclude that acoustic and rheological measurements complement each other with acoustic techniques offering the possibility of inline, in process determination of mechanical and flow properties such as viscosity, rigidity, compressibility and bulk modulus.
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Affiliation(s)
- Megan J Povey
- University of Leeds School of Food Science and Nutrition, Woodhouse Lane, LEEDS LS2 9JT, UK.
| | - Daniel Ingo Hefft
- School of Chemical Engineering, University of Birmingham, Edgbaston Campus, Birmingham B15 2TT, UK
- Campden BRI, Station Road, Chipping Campden GL55 6LD, UK
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4
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Povey MJ, Ettelaie R, Lewtas K, Price A, Lai X, Sheng F. "Sounding" out crystal nuclei-A mathematical-physical and experimental investigation. J Chem Phys 2023; 158:2887908. [PMID: 37129304 DOI: 10.1063/5.0139811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 04/12/2023] [Indexed: 05/03/2023] Open
Abstract
We outline techniques for the control and measurement of the nucleation of crystalline materials. Small angle x-ray scattering/wide angle x-ray scattering x-ray diffraction measurements are presented that demonstrate the impact of low power, continuous, non-cavitational ultrasound on the nucleation and crystallization of a wax-n-eicosane dissolved in a heptane/toluene solvent. A mathematical-physical approach based on the rectification of heat and mass transport by such a low power oscillating pressure field is outlined, and it is suggested that this approach be combined with dissipative particle dynamics computational modeling to develop a predictive method capable of modeling the impact of low power oscillating pressure fields (acoustics and ultrasonics) on a wide range of nucleating systems. Combining the ultrasound pitch and catch speed of sound measurements with low power harmonically oscillating pressure fields to monitor and control nucleation presents the prospect of entirely new industrially significant methods of process control in crystallization. It also offers new insights into nucleation processes in general. However, for the acoustic control technique to be widely applied , further theoretical and modeling work will be necessary since, at present, we are unable to predict the precise effect of low power ultrasound in any given situation.
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Affiliation(s)
- Megan J Povey
- School of Food Science and Nutrition, The University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Rammile Ettelaie
- School of Food Science and Nutrition, The University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Ken Lewtas
- Lewtas Science and Technologies, Ltd., 264 Banbury Road, Oxford OX2 7DY, United Kingdom
| | - Andy Price
- Lewtas Science and Technologies, Ltd., 264 Banbury Road, Oxford OX2 7DY, United Kingdom
| | - Xiaojun Lai
- School of Chemical and Process Engineering, The University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Fei Sheng
- School of Chemical and Process Engineering, The University of Leeds, Leeds LS2 9JT, United Kingdom
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5
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Emulsifier crystal formation and its role in periodic deformation-relaxation of emulsion droplets upon cooling. J FOOD ENG 2023. [DOI: 10.1016/j.jfoodeng.2023.111430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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6
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Metilli L, Morris L, Lazidis A, Marty-Terrade S, Holmes M, Povey M, Simone E. Real-time monitoring of fat crystallization using pulsed acoustic spectroscopy and supervised machine learning. J FOOD ENG 2022. [DOI: 10.1016/j.jfoodeng.2022.111192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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7
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Gao Y, Meng Z. Crystallization of lipids and lipid emulsions treated by power ultrasound: A review. Crit Rev Food Sci Nutr 2022; 64:1882-1893. [PMID: 36073738 DOI: 10.1080/10408398.2022.2119365] [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] [Indexed: 11/03/2022]
Abstract
The actual food system with fat is always complex and fat crystal and fat crystal networks have important effects on the physical properties of food. Recently, power ultrasound (PU) had been widely recognized as an auxiliary technology of fat crystallization to modify food properties. This review expounded on the mechanism of ultrasonic crystallization, and summarized effects of various factors in the process of ultrasonic treatment on fat crystallization. Based on the above, combined with the application of ultrasound in emulsions, the ultrasonic fat crystallization effect in the emulsion system was judged and described. Research results indicated that PU could shorten the induction time of crystallization, accelerate the formation of crystal nuclei, and change the polymorphism of fat crystals. The product treated by PU formed smaller and more uniform crystals to produce a more viscoelastic fat crystal network. In emulsion systems, ultrasonic treatments showed the same effect, but the effect of ultrasonic crystallization on the emulsion stability was different due to fat crystals in different emulsion systems. Meanwhile, the importance of ultrasonic crystallization in lipid emulsions was emphasized, thus ultrasonic crystallization had great potential in emulsion systems.
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Affiliation(s)
- Yujie Gao
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, People's Republic of China
| | - Zong Meng
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, People's Republic of China
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8
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Glover Z, Gregersen SB, Wiking L, Hammershøj M, Simonsen AC. Microstructural changes in acid milk gels due to temperature‐controlled high‐intensity ultrasound treatment: Quantification by analysis of super‐resolution microscopy images. INT J DAIRY TECHNOL 2021. [DOI: 10.1111/1471-0307.12838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Zachary Glover
- Department of Physics, Chemistry and Pharmacy University of Southern Denmark Campusvej 55 Odense M 5230 Denmark
| | | | - Lars Wiking
- Department of Food Science Aarhus University Agro Food Park 48 Aarhus N 8200 Denmark
| | - Mariannne Hammershøj
- Department of Food Science Aarhus University Agro Food Park 48 Aarhus N 8200 Denmark
| | - Adam Cohen Simonsen
- Department of Physics, Chemistry and Pharmacy University of Southern Denmark Campusvej 55 Odense M 5230 Denmark
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9
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Ramos-de-la-Peña AM, Aguilar O, González-Valdez J. Progress in nanostructure understanding of edible crystalline fats and their application in nano-delivery systems: Cocoa butter as a model. Food Res Int 2021; 147:110561. [PMID: 34399538 DOI: 10.1016/j.foodres.2021.110561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 05/30/2021] [Accepted: 06/22/2021] [Indexed: 11/30/2022]
Abstract
Nucleation and crystal growth of edible fats at the nanoscale have received little attention due to analytical limitations. A key factor to modify the properties of edible fats is nanostructure understanding. Progress within the last years will be presented, including analytical techniques used to investigate fat crystallization. Cocoa butter has been the subject of several works due to its properties and its high impact on chocolate manufacturing. Moreover, this vegetable fat has been used as the solid lipid component in nano delivery systems. Since nanoplatelet is the smallest unit in crystalline fats, and the nanoscale is influenced by supersaturation, temperature, shear fields, and surfactants, nanostructure engineering is possible. On its part, cocoa butter has been included in innovative delivery systems along the last years. This review will highlight main results and challenges on these topics.
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Affiliation(s)
- Ana Mayela Ramos-de-la-Peña
- Tecnologico de Monterrey, School of Engineering and Science, Av. Eugenio Garza Sada 2501 Sur, Monterrey, NL 64849, Mexico.
| | - Oscar Aguilar
- Tecnologico de Monterrey, School of Engineering and Science, Av. Eugenio Garza Sada 2501 Sur, Monterrey, NL 64849, Mexico.
| | - José González-Valdez
- Tecnologico de Monterrey, School of Engineering and Science, Av. Eugenio Garza Sada 2501 Sur, Monterrey, NL 64849, Mexico.
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10
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Characterisation of single malt Scotch Whisky using low powered ultrasound and UV‐Visible spectroscopy. JOURNAL OF THE INSTITUTE OF BREWING 2020. [DOI: 10.1002/jib.633] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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11
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Birkin PR, Youngs JJ, Truscott TT, Martini S. Cavitation clusters in lipid systems - Ring-up, bubble population, and bifurcated streamer lifetime. ULTRASONICS SONOCHEMISTRY 2020; 67:105168. [PMID: 32482437 DOI: 10.1016/j.ultsonch.2020.105168] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 03/24/2020] [Accepted: 05/07/2020] [Indexed: 06/11/2023]
Abstract
The processing of oils is vital to their ultimate use within the food industry. Control over the physical properties of such materials could be achieved through the application of high-intensity ultrasound (HIU). However, the exact mechanism, centred upon acoustic cavitation, is currently unclear. To investigate the cavitation environment in oils further, the ring-up of a HIU source in an oil media is studied in the presence and absence of a pre-existing bubble population. High-speed imaging and acoustic measurements within the system is demonstrated to be extremely useful in characterising the dynamics present under non steady-state conditions. The behaviour of the clusters generated in the first 1000 ms under these conditions is shown to be significantly different depending on the bubble population. A bifurcated streamer (BiS), originating from a unique bi-cluster event, is only observable in the presence of a bubble population during the ring-up process to higher cluster orders. In addition, the lifetime of this BiS event is highly temperature dependent and is shown to be a good marker for the viscosity of the oil employed.
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Affiliation(s)
- P R Birkin
- Chemistry, University of Southampton, Southampton S0171BJ, UK.
| | - J J Youngs
- Chemistry, University of Southampton, Southampton S0171BJ, UK
| | - T T Truscott
- Department of Mechanical and Aerospace Engineering, Utah State University, Logan, UT 84322-4130, USA
| | - S Martini
- Department of Nutrition, Dietetics, and Food Science, Utah State University, Logan, UT 84322-8700, USA
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12
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Mohan MS, O'Callaghan TF, Kelly P, Hogan SA. Milk fat: opportunities, challenges and innovation. Crit Rev Food Sci Nutr 2020; 61:2411-2443. [PMID: 32649226 DOI: 10.1080/10408398.2020.1778631] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Milk fat is a high-value milk component that is processed mainly as butter, cheese, cream and whole milk powder. It is projected that approximately 35 million tonnes of milk fat will be produced globally by 2025. This surplus, enhances the need for diversification of milk fat products and the milk pool in general. Infant milk formula producers, for instance, have incorporated enzyme modified ("humanised") milk fat and fat globule phospholipids to better mimic human milk fat structures. Minor components like mono- and di-glycerides from milk fat are increasingly utilized as emulsifiers, replacing palm esters in premium-priced food products. This review examines the chemistry of milk fat and the technologies employed for its modification, fractionation and enrichment. Emerging processing technologies such as ultrasound, high pressure processing, supercritical fluid extraction and fractionation, can be employed to improve the nutritional and functional attributes of milk fat. The potential of recent developments in biological intervention, through dietary manipulation of milk fatty acid profiles in cattle also offers significant promise. Finally, this review provides evidence to help redress the imbalance in reported associations between milk fat consumption and human health, and elucidates the health benefits associated with consumption of milk fat and dairy products.
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Affiliation(s)
- Maneesha S Mohan
- Food Chemistry and Technology Department, Teagasc Food Research Centre, Moorepark, Fermoy, Co. Cork, Ireland
| | - Tom F O'Callaghan
- Food Chemistry and Technology Department, Teagasc Food Research Centre, Moorepark, Fermoy, Co. Cork, Ireland
| | - Phil Kelly
- Food Chemistry and Technology Department, Teagasc Food Research Centre, Moorepark, Fermoy, Co. Cork, Ireland
| | - Sean A Hogan
- Food Chemistry and Technology Department, Teagasc Food Research Centre, Moorepark, Fermoy, Co. Cork, Ireland
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13
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Guo Y, Cai Z, Xie Y, Ma A, Zhang H, Rao P, Wang Q. Synthesis, physicochemical properties, and health aspects of structured lipids: A review. Compr Rev Food Sci Food Saf 2020; 19:759-800. [PMID: 33325163 DOI: 10.1111/1541-4337.12537] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Revised: 12/04/2019] [Accepted: 01/03/2020] [Indexed: 02/06/2023]
Abstract
Structured lipids (SLs) refer to a new type of functional lipids obtained by chemically, enzymatically, or genetically modifying the composition and/or distribution of fatty acids in the glycerol backbone. Due to the unique physicochemical characteristics and health benefits of SLs (for example, calorie reduction, immune function improvement, and reduction in serum triacylglycerols), there is increasing interest in the research and application of novel SLs in the food industry. The chemical structures and molecular architectures of SLs define mainly their physicochemical properties and nutritional values, which are also affected by the processing conditions. In this regard, this holistic review provides coverage of the latest developments and applications of SLs in terms of synthesis strategies, physicochemical properties, health aspects, and potential food applications. Enzymatic synthesis of SLs particularly with immobilized lipases is presented with a short introduction to the genetic engineering approach. Some physical features such as solid fat content, crystallization and melting behavior, rheology and interfacial properties, as well as oxidative stability are discussed as influenced by chemical structures and processing conditions. Health-related considerations of SLs including their metabolic characteristics, biopolymer-based lipid digestion modulation, and oleogelation of liquid oils are also explored. Finally, potential food applications of SLs are shortly introduced. Major challenges and future trends in the industrial production of SLs, physicochemical properties, and digestion behavior of SLs in complex food systems, as well as further exploration of SL-based oleogels and their food application are also discussed.
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Affiliation(s)
- Yalong Guo
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Advanced Rheology Institute, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai, P. R. China
| | - Zhixiang Cai
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Advanced Rheology Institute, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai, P. R. China
| | - Yanping Xie
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Advanced Rheology Institute, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai, P. R. China
| | - Aiqin Ma
- Shanghai Jiao Tong University Affiliated Sixth People's Hospital South Campus, Shanghai, P. R. China
| | - Hongbin Zhang
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Advanced Rheology Institute, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai, P. R. China
| | - Pingfan Rao
- Food Nutrition Sciences Centre, Zhejiang Gongshang University, Hangzhou, P. R. China
| | - Qiang Wang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
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14
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15
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Adhikari BM, Tung VP, Truong T, Bansal N, Bhandari B. Water Crystallisation of Model Sugar Solutions with Nanobubbles Produced from Dissolved Carbon Dioxide. FOOD BIOPHYS 2019. [DOI: 10.1007/s11483-019-09590-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Acoustic characterisation of pH dependant reversible micellar casein aggregation. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.02.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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17
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Gregersen SB, Frydenberg RP, Hammershøj M, Dalsgaard TK, Andersen U, Wiking L. Application of High Intensity Ultrasound to Accelerate Crystallization of Anhydrous Milk Fat and Rapeseed Oil Blends. EUR J LIPID SCI TECH 2018. [DOI: 10.1002/ejlt.201800200] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | | | - Marianne Hammershøj
- Department of Food Science; Aarhus University; P.O. Box 50 8830 Tjele Denmark
| | | | | | - Lars Wiking
- Department of Food Science; Aarhus University; P.O. Box 50 8830 Tjele Denmark
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18
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Sadeghpour A, Parada ML, Vieira J, Povey M, Rappolt M. Global Small-Angle X-ray Scattering Data Analysis of Triacylglycerols in the Molten State (Part I). J Phys Chem B 2018; 122:10320-10329. [PMID: 30351127 DOI: 10.1021/acs.jpcb.8b06704] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The study of triacylglycerols (TAGs) in their molten state is of fundamental importance for a deeper understanding of the TAG crystallization processes, being highly relevant for both manufacturing and medical applications. Although different models have been proposed to explain the nanostructured nature of the fluid state of TAGs, none of them are fully satisfactory. In this paper, we propose a new model consisting of positionally uncorrelated lamellar TAG assemblies embedded in an isotropic medium that assist as prenucleating structures. This model was validated by applying a novel global fitting method, resulting in an excellent agreement with the small-angle X-ray scattering data. A deeper analysis of the scattering patterns at different temperatures, both in cooling and heating directions, allowed us further to detect the crystalline traces of TAGs even after heating to 40 °C and record, on cooling, the onset of crystallization at 30-25 °C. The application of the presented novel model not only explains the outstandingly structured fluid of molten TAGs, but also lays the basis for analyzing first the crystallization steps in greater detail, which is outlined in our follow-up paper "Global Small-Angle X-ray Scattering Data Analysis of Triacylglycerols in the α-Phase (Part II)".
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Affiliation(s)
- Amin Sadeghpour
- School of Food Science and Nutrition , University of Leeds , Leeds LS2 9JT , U.K.,Department of Materials Meet Life, Empa , Swiss Federal Laboratories for Materials Science and Technology , 8600 St. Gallen , Switzerland
| | - Marjorie Ladd Parada
- School of Food Science and Nutrition , University of Leeds , Leeds LS2 9JT , U.K
| | | | - Megan Povey
- School of Food Science and Nutrition , University of Leeds , Leeds LS2 9JT , U.K
| | - Michael Rappolt
- School of Food Science and Nutrition , University of Leeds , Leeds LS2 9JT , U.K
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19
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Huang MS, Zhang M, Bhandari B. Synergistic effects of ultrasound and microwave on the pumpkin slices qualities during ultrasound-assisted microwave vacuum frying. J FOOD PROCESS ENG 2018. [DOI: 10.1111/jfpe.12835] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Meng-sha Huang
- State Key Laboratory of Food Science and Technology; Jiangnan University; Wuxi Jiangsu China
- International Joint Laboratory on Food Safety; Jiangnan University; Wuxi Jiangsu China
| | - Min Zhang
- State Key Laboratory of Food Science and Technology; Jiangnan University; Wuxi Jiangsu China
- Jiangsu Province Key Laboratory of Advanced Food Manufacturing Equipment and Technology; Jiangnan University; Wuxi Jiangsu China
| | - Bhesh Bhandari
- School of Agriculture and Food Sciences, University of Queensland; Brisbane QLD Australia
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20
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Adhikari BM, Truong T, Bansal N, Bhandari B. Influence of gas addition on crystallisation behaviour of lactose from supersaturated solution. FOOD AND BIOPRODUCTS PROCESSING 2018. [DOI: 10.1016/j.fbp.2018.03.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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