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Mateo-Roque P, Morales-Camacho JI, Jara-Romero GJ, Rosas-Cárdenas FDF, Huerta-González L, Luna-Suárez S. Supercritical CO 2 Treatment to Modify Techno-Functional Properties of Proteins Extracted from Tomato Seeds. Foods 2024; 13:1045. [PMID: 38611350 PMCID: PMC11011313 DOI: 10.3390/foods13071045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 03/24/2024] [Accepted: 03/25/2024] [Indexed: 04/14/2024] Open
Abstract
Tomato seeds are a rich source of protein that can be utilized for various industrial food purposes. This study delves into the effects of using supercritical CO2 (scCO2) on the structure and techno-functional properties of proteins extracted from defatted tomato seeds. The defatted meal was obtained using hexane (TSMH) and scCO2 (TSMC), and proteins were extracted using water (PEWH and PEWC) and saline solution (PESH and PESC). The results showed that scCO2 treatment significantly improved the techno-functional properties of protein extracts, such as oil-holding capacity and foaming capacity (especially for PEWC). Moreover, emulsifying capacity and stability were enhanced for PEWC and PESC, ranging between 4.8 and 46.7% and 11.3 and 96.3%, respectively. This was made possible by the changes in helix structure content induced by scCO2 treatment, which increased for PEWC (5.2%) and decreased for PESC (8.0%). Additionally, 2D electrophoresis revealed that scCO2 hydrolyzed alkaline proteins in the extracts. These findings demonstrate the potential of scCO2 treatment in producing modified proteins for food applications.
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Affiliation(s)
- Paola Mateo-Roque
- Centro de Investigación en Biotecnología Aplicada, Instituto Politécnico Nacional, Tepetitla 90700, Tlaxcala, Mexico; (P.M.-R.); (G.J.J.-R.); (F.d.F.R.-C.); (L.H.-G.)
| | - Jocksan I. Morales-Camacho
- Departamento de Ingeniería Química, Alimentos y Ambiental, Universidad de las Américas Puebla, San Andrés Cholula 72810, Puebla, Mexico;
| | - Guadalupe Janet Jara-Romero
- Centro de Investigación en Biotecnología Aplicada, Instituto Politécnico Nacional, Tepetitla 90700, Tlaxcala, Mexico; (P.M.-R.); (G.J.J.-R.); (F.d.F.R.-C.); (L.H.-G.)
| | - Flor de Fátima Rosas-Cárdenas
- Centro de Investigación en Biotecnología Aplicada, Instituto Politécnico Nacional, Tepetitla 90700, Tlaxcala, Mexico; (P.M.-R.); (G.J.J.-R.); (F.d.F.R.-C.); (L.H.-G.)
| | - Luis Huerta-González
- Centro de Investigación en Biotecnología Aplicada, Instituto Politécnico Nacional, Tepetitla 90700, Tlaxcala, Mexico; (P.M.-R.); (G.J.J.-R.); (F.d.F.R.-C.); (L.H.-G.)
| | - Silvia Luna-Suárez
- Centro de Investigación en Biotecnología Aplicada, Instituto Politécnico Nacional, Tepetitla 90700, Tlaxcala, Mexico; (P.M.-R.); (G.J.J.-R.); (F.d.F.R.-C.); (L.H.-G.)
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Sheikh MA, Saini CS, Sharma HK. Structural modification of plum (Prunus domestica L) kernel protein isolate by supercritical carbon-dioxide treatment: Functional properties and in-vitro protein digestibility. Int J Biol Macromol 2023; 230:123128. [PMID: 36621744 DOI: 10.1016/j.ijbiomac.2022.123128] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 12/14/2022] [Accepted: 12/30/2022] [Indexed: 01/07/2023]
Abstract
The effect of supercritical carbon dioxide (SC-CO2) treatment at different processing temperatures (30-70 °C) on the physico-functional properties, structural features, and in-vitro digestibility (IVPD) of plum kernel protein isolates (PKPI) was examined. The results revealed remarkable changes in the secondary structures of SC-CO2-treated PKPIs, including a decrease in α-helix proportion, a concomitant increase in β-sheet content, and a considerable variation in random coils and β-turn structures. The temperature rise increased the negative zeta potential to a maximum of 31.35 mV at 60 °C, exhibiting the colloidal stability of PKPI dispersions. SDS-PAGE analysis showed variations in the intensities of protein bands, indicating denaturation and aggregation at higher temperatures. These structural and molecular changes improved water-binding capacity (1.22-fold) and oil binding capacity (1.11-fold), wettability (1.12-fold), and the highest value in all the properties was recorded at 60 °C. Moreover, the highest IVPD value (21.58 %) and a distinguishable colour difference (∆E) of 8.11 was also obtained at 60 °C of the processing temperature. Therefore, SC-CO2 treatment-induced modification of PKPI contributed to the enhanced digestibility and techno-functional properties, which offered new prospects to extend its use in food applications.
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Affiliation(s)
- Mohd Aaqib Sheikh
- Department of Food Engineering and Technology, Sant Longowal Institute of Engineering and Technology, Longowal, 148106 Sangrur, Punjab, India.
| | - Charanjiv Singh Saini
- Department of Food Engineering and Technology, Sant Longowal Institute of Engineering and Technology, Longowal, 148106 Sangrur, Punjab, India
| | - Harish Kumar Sharma
- Department of Chemical Engineering, National Institute of Technology, Agartala 799046, India
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Investigating the Effect of Supercritical Carbon Dioxide Treatment on the Rheological, Thermal, and Functional Properties of Plum ( Prunus domestica L.) Kernel Protein Isolates. Foods 2023; 12:foods12040815. [PMID: 36832890 PMCID: PMC9956240 DOI: 10.3390/foods12040815] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/18/2023] [Accepted: 02/07/2023] [Indexed: 02/16/2023] Open
Abstract
Plum kernels are a promising source of dietary proteins that are irretrievably lost during processing. The recovery of these underexploited proteins could be eminently vital for human nutrition. Plum kernel protein isolate (PKPI) was prepared and exposed to a targeted supercritical carbon dioxide (SC-CO2) treatment to diversify its effectiveness in industrial applications. The impacts of SC-CO2 treatment at different processing temperatures (30-70 °C) on dynamic rheology, microstructure, thermal, and techno-functional characteristics of PKPI were investigated. The results revealed that the dynamic viscoelastic characteristics of SC-CO2-treated PKPIs showed higher storage modulus, loss modulus, and lower tan δ value than native PKPI, indicating greater strength and elasticity of the gels. Microstructural analysis showed that the proteins experienced denaturation at elevated temperatures and resulted in the formation of soluble aggregates, which increased the heat requirement for thermal denaturation of SC-CO2-treated samples. SC-CO2-treated PKPIs demonstrated a decline of 20.74% and 30.5% in crystallite size and crystallinity. PKPIs treated at 60 °C showed the highest dispersibility, which was 1.15-fold higher than the native PKPI sample. SC-CO2 treatment offers a novel path to improve the techno-functional properties of PKPIs and extend its use in food and non-food applications.
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Mei L, Fu Q, Guo T, Ji Q, Zhou Y. Structural changes and cholesterol-lowering in denatured whey protein isolate: Malic acid combined enzymolysis. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2022.107502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Rodrigues RC, Berenguer-Murcia Á, Carballares D, Morellon-Sterling R, Fernandez-Lafuente R. Stabilization of enzymes via immobilization: Multipoint covalent attachment and other stabilization strategies. Biotechnol Adv 2021; 52:107821. [PMID: 34455028 DOI: 10.1016/j.biotechadv.2021.107821] [Citation(s) in RCA: 229] [Impact Index Per Article: 76.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 07/26/2021] [Accepted: 08/21/2021] [Indexed: 12/22/2022]
Abstract
The use of enzymes in industrial processes requires the improvement of their features in many instances. Enzyme immobilization, a requirement to facilitate the recovery and reuse of these water-soluble catalysts, is one of the tools that researchers may utilize to improve many of their properties. This review is focused on how enzyme immobilization may improve enzyme stability. Starting from the stabilization effects that an enzyme may experience by the mere fact of being inside a solid particle, we detail other possibilities to stabilize enzymes: generation of favorable enzyme environments, prevention of enzyme subunit dissociation in multimeric enzymes, generation of more stable enzyme conformations, or enzyme rigidification via multipoint covalent attachment. In this last point, we will discuss the features of an "ideal" immobilization protocol to maximize the intensity of the enzyme-support interactions. The most interesting active groups in the support (glutaraldehyde, epoxide, glyoxyl and vinyl sulfone) will be also presented, discussing their main properties and uses. Some instances in which the number of enzyme-support bonds is not directly related to a higher stabilization will be also presented. Finally, the possibility of coupling site-directed mutagenesis or chemical modification to get a more intense multipoint covalent immobilization will be discussed.
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Affiliation(s)
- Rafael C Rodrigues
- Biocatalysis and Enzyme Technology Lab, Institute of Food Science and Technology, Federal University of Rio Grande do Sul, Av. Bento Gonçalves, 9500, P.O. Box 15090, Porto Alegre, RS, Brazil
| | | | - Diego Carballares
- Departamento de Biocatálisis, ICP-CSIC, Campus UAM-CSIC Cantoblanco, Madrid, Spain
| | | | - Roberto Fernandez-Lafuente
- Departamento de Biocatálisis, ICP-CSIC, Campus UAM-CSIC Cantoblanco, Madrid, Spain; Center of Excellence in Bionanoscience Research, External Scientific Advisory Academics, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
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Arora B, Rizvi SSH. Process optimisation and product characterisation of milk protein concentrate extrudates expanded by supercritical carbon dioxide. INT J DAIRY TECHNOL 2021. [DOI: 10.1111/1471-0307.12801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Bindvi Arora
- Department of Food Science Cornell University Ithaca NY 14850 USA
| | - Syed S H Rizvi
- Department of Food Science Cornell University Ithaca NY 14850 USA
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García-Cano I, Yeh PW, Rocha-Mendoza D, Jiménez-Flores R. Supercritical CO 2 treatment reduces the antigenicity of buttermilk β-lactoglobulin and its inflammatory response in Caco-2 cells. JDS COMMUNICATIONS 2021; 2:1-6. [PMID: 36337288 PMCID: PMC9623642 DOI: 10.3168/jdsc.2020-0028] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 10/21/2020] [Indexed: 01/14/2024]
Abstract
β-Lactoglobulin (β-LG) is believed to be a common allergen in bovine milk. Buttermilk (BM) powder has abundant contents of milk fat globule membrane and phospholipid, both of which have been demonstrated to have positive effects on brain and cognitive development during early infancy. This study focused on modifying β-LG in BM via supercritical CO2 (ScCO2) treatment to modify its reactivity to antibodies and thus reduce its antigenicity. Buttermilk powder was treated in a supercritical fluid extraction system with food-grade CO2 at 100, 150, 200, 250, 350, and 400 bar at 2 temperatures, 50 and 75°C. All analyses were completed in a 10% BM suspension (wt/vol). The BM proteins were examined using sodium dodecyl sulfate (SDS)-PAGE, Western blot, ELISA, and periodic acid staining methods. Semi-purified β-LG was used to evaluate the cytotoxicity, viability, and inflammatory response in the Caco-2 cell line by means of the lactate dehydrogenase assay, MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium] assay, and IL-8 production, respectively. The SDS-PAGE showed that the signal intensity of β-LG bands was reduced by up to 50% after being processed at 250 bar and 75°C for 30 min. Lighter and more diffuse signals were found by Western blot, indicating modification of the protein structure. The ELISA demonstrated that ScCO2 treatment could significantly change β-LG antigenicity in BM. Sugar moieties in bands corresponding to β-LG were revealed by periodic acid staining, indicating glycosylation only in samples treated with ScCO2. Caco-2 cells treated with whey proteins had high viability, 24.9% lower inflammation, and no evidence of cytotoxicity compared with untreated cultures. These results showed that reduced antigenicity of β-LG was caused by lactosylation, which has been reported as a possible pathway to reduce the allergenicity in foods. The denaturation of β-LG by supercritical fluid processing is a promising way to address milk allergy, which remains a problem requiring more attention and further research.
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Affiliation(s)
- Israel García-Cano
- Department of Food Science and Technology, Parker Food Science & Technology Building, The Ohio State University, Columbus 43210
| | - Po-Wei Yeh
- Department of Food Science and Technology, Parker Food Science & Technology Building, The Ohio State University, Columbus 43210
| | - Diana Rocha-Mendoza
- Department of Food Science and Technology, Parker Food Science & Technology Building, The Ohio State University, Columbus 43210
| | - Rafael Jiménez-Flores
- Department of Food Science and Technology, Parker Food Science & Technology Building, The Ohio State University, Columbus 43210
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8
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Changes in protein structure and physicochemical properties of egg white by super critical carbon dioxide treatment. J FOOD ENG 2020. [DOI: 10.1016/j.jfoodeng.2020.110076] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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9
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Gañan N, Bordón MG, Ribotta PD, González A. Study of chia oil microencapsulation in soy protein microparticles using supercritical Co2-assisted impregnation. J CO2 UTIL 2020. [DOI: 10.1016/j.jcou.2020.101221] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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10
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Ma S, Yang X, Zhao C, Guo M. Ultrasound-induced changes in structural and physicochemical properties of β-lactoglobulin. Food Sci Nutr 2018. [PMID: 29983970 DOI: 10.1002/fsn3.2018.6.issue-410.1002/fsn3.646] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023] Open
Abstract
Effect of ultrasound treatment on the physicochemical properties and structure of β-lactoglobulin were investigated. β-Lactoglobulin was treated with ultrasound at different amplitudes, temperatures, and durations. The surface hydrophobicity and free sulfhydryl group of β-lactoglobulin were significantly increased after ultrasound treatment (p < .05). The maximal surface hydrophobicity and free sulfhydryl group were 5,812.08 and 5.97 μmol/g, respectively. Ultrasound treatment changed the physicochemical properties of β-lactoglobulin including particle size (from 1.21 ± 0.05 nm to 1.66 ± 0.03 nm), absolute zeta potential (from 15.47 ± 1.60 mV to 27.63 ± 3.30 mV), and solubility (from 84.66% to 95.17%). Ultrasound treatment increased α-helix and β-sheet structures of β-lactoglobulin. Intrinsic fluorescence intensity of ultrasound-treated β-lactoglobulin was increased with shift of λmax from 334 to 329 nm. UV absorption of β-lactoglobulin was decreased with shift of λmax from 288 to 285 nm after ultrasound treatment. There were no significant changes in high-performance liquid chromatography and protein electrophoretic patterns. These findings indicated that ultrasound treatment had high potential in modifying the physiochemical and structural properties of β-lactoglobulin for industrial applications.
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Affiliation(s)
- Shuang Ma
- Department of Food Science College of Food Science and Engineering Jilin University Changchun China
| | - Xu Yang
- Department of Radiotherapy First Hospital of Jilin University Changchun China
| | - Changhui Zhao
- Department of Food Science College of Food Science and Engineering Jilin University Changchun China
| | - Mingruo Guo
- Department of Food Science Northeast Agriculture University Harbin China
- Department of Nutrition and Food Sciences College of Agriculture and Life Sciences University of Vermont Burlington VT USA
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Ma S, Yang X, Zhao C, Guo M. Ultrasound-induced changes in structural and physicochemical properties of β-lactoglobulin. Food Sci Nutr 2018; 6:1053-1064. [PMID: 29983970 PMCID: PMC6021715 DOI: 10.1002/fsn3.646] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 02/23/2018] [Accepted: 03/15/2018] [Indexed: 11/08/2022] Open
Abstract
Effect of ultrasound treatment on the physicochemical properties and structure of β-lactoglobulin were investigated. β-Lactoglobulin was treated with ultrasound at different amplitudes, temperatures, and durations. The surface hydrophobicity and free sulfhydryl group of β-lactoglobulin were significantly increased after ultrasound treatment (p < .05). The maximal surface hydrophobicity and free sulfhydryl group were 5,812.08 and 5.97 μmol/g, respectively. Ultrasound treatment changed the physicochemical properties of β-lactoglobulin including particle size (from 1.21 ± 0.05 nm to 1.66 ± 0.03 nm), absolute zeta potential (from 15.47 ± 1.60 mV to 27.63 ± 3.30 mV), and solubility (from 84.66% to 95.17%). Ultrasound treatment increased α-helix and β-sheet structures of β-lactoglobulin. Intrinsic fluorescence intensity of ultrasound-treated β-lactoglobulin was increased with shift of λmax from 334 to 329 nm. UV absorption of β-lactoglobulin was decreased with shift of λmax from 288 to 285 nm after ultrasound treatment. There were no significant changes in high-performance liquid chromatography and protein electrophoretic patterns. These findings indicated that ultrasound treatment had high potential in modifying the physiochemical and structural properties of β-lactoglobulin for industrial applications.
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Affiliation(s)
- Shuang Ma
- Department of Food ScienceCollege of Food Science and EngineeringJilin UniversityChangchunChina
| | - Xu Yang
- Department of RadiotherapyFirst Hospital of Jilin UniversityChangchunChina
| | - Changhui Zhao
- Department of Food ScienceCollege of Food Science and EngineeringJilin UniversityChangchunChina
| | - Mingruo Guo
- Department of Food ScienceNortheast Agriculture UniversityHarbinChina
- Department of Nutrition and Food SciencesCollege of Agriculture and Life SciencesUniversity of VermontBurlingtonVTUSA
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Liu S, Liu Y, Luo S, Dong A, Liu M, Ji H, Gao J, Hao J. Molecular dynamics simulation of the interaction between dense-phase carbon dioxide and the myosin heavy chain. J CO2 UTIL 2017. [DOI: 10.1016/j.jcou.2017.07.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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13
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Guo M, Liu S, Ismail M, Farid MM, Ji H, Mao W, Gao J, Li C. Changes in the myosin secondary structure and shrimp surimi gel strength induced by dense phase carbon dioxide. Food Chem 2017; 227:219-226. [DOI: 10.1016/j.foodchem.2017.01.050] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2016] [Revised: 11/14/2016] [Accepted: 01/11/2017] [Indexed: 12/16/2022]
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Housaindokht MR, Monhemi H. The open lid conformation of the lipase is explored in the compressed gas: New insights from molecular dynamic simulation. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.molcatb.2012.11.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Kitajima S, Bertasi F, Vezzù K, Negro E, Tominaga Y, Di Noto V. Dielectric relaxations and conduction mechanisms in polyether–clay composite polymer electrolytes under high carbon dioxide pressure. Phys Chem Chem Phys 2013; 15:16626-33. [DOI: 10.1039/c3cp51745d] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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How enzymes can remain active and stable in a compressed gas? New insights into the conformational stability of Candida antarctica lipase B in near-critical propane. J Supercrit Fluids 2012. [DOI: 10.1016/j.supflu.2012.08.020] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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17
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Enzyme is stabilized by a protection layer of ionic liquids in supercritical CO2: Insights from molecular dynamic simulation. J Supercrit Fluids 2012. [DOI: 10.1016/j.supflu.2012.04.020] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Evaluation of structure and hydrolysis activity of Candida rugosa Lip7 in presence of sub-/super-critical CO₂. Enzyme Microb Technol 2012; 51:354-8. [PMID: 23040391 DOI: 10.1016/j.enzmictec.2012.08.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Revised: 07/19/2012] [Accepted: 08/08/2012] [Indexed: 11/20/2022]
Abstract
This work aimed to assess the effect of sub-/super-critical CO₂ on the structure and activity of Candida rugosa Lip7 (CRL7) in its solution form. The structure was examined by SDS-PAGE gel electrophoresis, circular dichroism (CD) and fluorescence spectra photometry. Results revealed that the primary structure remained intact after sub-/super-critical CO₂ treatment, and the secondary structure altered at the pressure of 10 MPa and temperature 40°C for 30 min incubation, but it was reflex to its native form with increasing incubation time up to 150 min under 10 MPa and 40 °C. Meanwhile, the tertiary structure via fluorescence spectra analysis showed that the intensity of the maximal emission wavelength at 338 nm decreased under the conditions of 10 MPa and 40°C for 150 min. Furthermore, the residue hydrolysis activity and kinetics constants (V(max) and K(m)) of CRL7 treated with sub-/super-critical CO₂ were also investigated. In cases of 6 MPa and 35°C, or 10 MPa and 40°C for 30 min, activity variance of CRL7 was maybe caused by its secondary structure alteration. But in case of 10 MPa and 40°C for 150 min, the tertiary structure change was perhaps responsibility for CRL7 activity enhancement.
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Structural behavior of Candida antarctica lipase B in water and supercritical carbon dioxide: A molecular dynamic simulation study. J Supercrit Fluids 2012. [DOI: 10.1016/j.supflu.2011.12.010] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Di Noto V, Vezzù K, Giffin GA, Conti F, Bertucco A. Effect of High Pressure CO2 on the Structure of PMMA: A FT-IR Study. J Phys Chem B 2011; 115:13519-25. [DOI: 10.1021/jp207917n] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vito Di Noto
- Department of Chemical Sciences, University of Padova, via Marzolo 1, I-35131 Padova, Italy
- Institute of Molecular Science and Technology of the CNR of Padova, Via Marzolo 1, I-35131 Padova, Italy
| | - Keti Vezzù
- Department of Chemical Sciences, University of Padova, via Marzolo 1, I-35131 Padova, Italy
- Department of Molecular Science and Nanosystems, University of Venezia, via Dorsoduro 2137, I-30123 Venezia, Italy
| | - Guinevere A. Giffin
- Department of Chemical Sciences, University of Padova, via Marzolo 1, I-35131 Padova, Italy
| | - Fosca Conti
- Department of Chemical Sciences, University of Padova, via Marzolo 1, I-35131 Padova, Italy
| | - Alberto Bertucco
- Department of Chemical Engineering, University of Padova, via Marzolo 9, 35131 Padova, Italy
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Di Noto V, Vezzù K, Conti F, Giffin GA, Lavina S, Bertucco A. Broadband electric spectroscopy at high CO2 pressure: dipole moment of CO2 and relaxation phenomena of the CO2-poly(vinyl chloride) system. J Phys Chem B 2011; 115:9014-21. [PMID: 21678893 DOI: 10.1021/jp2043448] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Broadband electric spectroscopy (BES) is a technique that shows promise in studying the interactions of dense or supercritical gases with polymers, particularly with respect to chain mobility. Polymers that are treated with dense gases show a reduction in the viscosity, glass transition, and melting temperature. A high pressure cell for BES has been constructed that can be used from ambient temperature and pressure to 353 K and 15 MPa and over a frequency range from 20 Hz to 1 MHz. In the past, the dielectric constant of CO(2) was determined by measurements at only one or two frequency values. New instrumentation and technology allow this experiment to be expanded to cover a wider frequency range. BES measurements of CO(2) do not show any relaxation peaks in the permittivity from 20 Hz to 1 MHz and 1 to 6 MPa. By these measurements, the CO(2) dielectric constant was evaluated between 0.1 and 6 MPa. Cell testing with poly(vinyl chloride) (PVC) at 323 K and CO(2) pressures from 0.1 to 13 MPa indicate an increase in the chain segmental motion at high pressures resulting from a reduction in the glass transition temperature of the PVC-CO(2) system due to plasticization by CO(2).
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Affiliation(s)
- Vito Di Noto
- Department of Chemical Sciences, University of Padua, Via F. Marzolo 1, I-35131 Padova, Italy.
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Banerjee P, Keener KM, Lukito VD. Influence of carbon dioxide on the activity of chicken egg white lysozyme. Poult Sci 2011; 90:889-95. [PMID: 21406377 DOI: 10.3382/ps.2010-00854] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Rapid cooling of shell eggs by using liquid CO(2) has shown increased bactericidal effects along with saturation of the egg albumen with CO(2). Lysozyme is a bactericidal enzyme present in chicken eggs, and it lyses gram-positive bacteria. Newly laid chicken eggs have an initial pH of 7.6 to 8.5 and are saturated with CO(2). During storage, the pH gradually increases to 9.7, accompanied by a loss of CO(2). It is hypothesized that the lysozyme activity is influenced by either CO(2) concentration or pH changes resulting from CO(2) loss. The objective of this study was to determine the lytic activity of purified lysozyme and chicken egg white (unpurified lysozyme) under varying conditions of temperature, pH, and CO(2) gas concentration. Lytic activity was determined by a standard microbial assay using lyophilized Micrococcus lysodeikticus. A 2 × 4 × 2 × 2 × 3 factorial design consisting of 2 temperatures (5 and 22°C), 4 pH (4.5, 6.5, 8.0, and 9.5), 2 treatments (with and without CO(2)), 2 types of lysozyme (purified and unpurified egg white), and 3 replicates was used. The highest lytic activity was found at pH 6.5 and 22°C. At pH 4.5 and 8.0, the addition of CO(2) increased lytic activity by more than 50% at both temperatures. At pH 6.5, lytic activity was maintained with CO(2) addition at both temperatures. At pH 9.5, lytic activity without CO(2) addition was high; however, adding CO(2) reduced lytic activity to zero. In conclusion, both pH and CO(2) treatment influence lysozyme activity.
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Affiliation(s)
- P Banerjee
- Department of Food Science, Purdue University, West Lafayette, IN 47907-2009, USA
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Xu D, Yuan F, Jiang J, Wang X, Hou Z, Gao Y. Structural and conformational modification of whey proteins induced by supercritical carbon dioxide. INNOV FOOD SCI EMERG 2011. [DOI: 10.1016/j.ifset.2010.10.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Annabi N, Nichol JW, Zhong X, Ji C, Koshy S, Khademhosseini A, Dehghani F. Controlling the porosity and microarchitecture of hydrogels for tissue engineering. TISSUE ENGINEERING. PART B, REVIEWS 2010; 16:371-83. [PMID: 20121414 PMCID: PMC2946907 DOI: 10.1089/ten.teb.2009.0639] [Citation(s) in RCA: 739] [Impact Index Per Article: 52.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2009] [Accepted: 01/29/2010] [Indexed: 12/19/2022]
Abstract
Tissue engineering holds great promise for regeneration and repair of diseased tissues, making the development of tissue engineering scaffolds a topic of great interest in biomedical research. Because of their biocompatibility and similarities to native extracellular matrix, hydrogels have emerged as leading candidates for engineered tissue scaffolds. However, precise control of hydrogel properties, such as porosity, remains a challenge. Traditional techniques for creating bulk porosity in polymers have demonstrated success in hydrogels for tissue engineering; however, often the conditions are incompatible with direct cell encapsulation. Emerging technologies have demonstrated the ability to control porosity and the microarchitectural features in hydrogels, creating engineered tissues with structure and function similar to native tissues. In this review, we explore the various technologies for controlling the porosity and microarchitecture within hydrogels, and demonstrate successful applications of combining these techniques.
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Affiliation(s)
- Nasim Annabi
- School of Chemical and Biomolecular Engineering, University of Sydney, Sydney, Australia
| | - Jason W. Nichol
- Department of Medicine, Center for Biomedical Engineering, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts
| | - Xia Zhong
- School of Chemical and Biomolecular Engineering, University of Sydney, Sydney, Australia
| | - Chengdong Ji
- School of Chemical and Biomolecular Engineering, University of Sydney, Sydney, Australia
| | - Sandeep Koshy
- Department of Medicine, Center for Biomedical Engineering, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts
| | - Ali Khademhosseini
- Department of Medicine, Center for Biomedical Engineering, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts
| | - Fariba Dehghani
- School of Chemical and Biomolecular Engineering, University of Sydney, Sydney, Australia
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Deactivation of isoamylase and β-amylase in the agitated reactor under supercritical carbon dioxide. Bioprocess Biosyst Eng 2010; 33:1007-15. [DOI: 10.1007/s00449-010-0425-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2010] [Accepted: 03/23/2010] [Indexed: 11/26/2022]
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26
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Studies on the conformational change of adsorbed BSA onto a moderately hydrophobic surface at different denaturant concentrations and surface coverages. J Colloid Interface Sci 2010; 344:468-74. [DOI: 10.1016/j.jcis.2010.01.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2009] [Revised: 12/27/2009] [Accepted: 01/06/2010] [Indexed: 11/23/2022]
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Ortore MG, Spinozzi F, Mariani P, Paciaroni A, Barbosa LRS, Amenitsch H, Steinhart M, Ollivier J, Russo D. Combining structure and dynamics: non-denaturing high-pressure effect on lysozyme in solution. J R Soc Interface 2009; 6 Suppl 5:S619-34. [PMID: 19570795 PMCID: PMC2843975 DOI: 10.1098/rsif.2009.0163.focus] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2009] [Accepted: 06/03/2009] [Indexed: 11/12/2022] Open
Abstract
Small-angle X-ray scattering (SAXS) and elastic and quasi-elastic neutron scattering techniques were used to investigate the high-pressure-induced changes on interactions, the low-resolution structure and the dynamics of lysozyme in solution. SAXS data, analysed using a global-fit procedure based on a new approach for hydrated protein form factor description, indicate that lysozyme completely maintains its globular structure up to 1500 bar, but significant modifications in the protein-protein interaction potential occur at approximately 600-1000 bar. Moreover, the mass density of the protein hydration water shows a clear discontinuity within this pressure range. Neutron scattering experiments indicate that the global and the local lysozyme dynamics change at a similar threshold pressure. A clear evolution of the internal protein dynamics from diffusing to more localized motions has also been probed. Protein structure and dynamics results have then been discussed in the context of protein-water interface and hydration water dynamics. According to SAXS results, the new configuration of water in the first hydration layer induced by pressure is suggested to be at the origin of the observed local mobility changes.
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Affiliation(s)
- Maria Grazia Ortore
- Dipartimento SAIFET, Sezione Scienze Fisiche, Università Politecnica delle Marche and CNISM, Ancona, Italy
| | - Francesco Spinozzi
- Dipartimento SAIFET, Sezione Scienze Fisiche, Università Politecnica delle Marche and CNISM, Ancona, Italy
| | - Paolo Mariani
- Dipartimento SAIFET, Sezione Scienze Fisiche, Università Politecnica delle Marche and CNISM, Ancona, Italy
| | - Alessandro Paciaroni
- Dipartimento di Fisica, Università degli Studi di Perugia and CNISM, Perugia, Italy
| | | | - Heinz Amenitsch
- Institute of Biophysics and Nanosystems Research, Austrian Academy of Sciences, Graz, Austria
| | - Milos Steinhart
- Institute of Macromolecular Chemistry, Prague, Czech Republic
| | | | - Daniela Russo
- CNR-INFM and CRS-SOFT, c/o Institut Laue-Langevin, Grenoble, France
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Wang SSS, Chao HS, Liu HL, Liu HS. Stability of hen egg white lysozyme during denaturation is enhanced by pretreatment with supercritical carbon dioxide. J Biosci Bioeng 2009; 107:355-9. [DOI: 10.1016/j.jbiosc.2008.11.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2007] [Accepted: 11/28/2008] [Indexed: 10/21/2022]
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29
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Manoi K, Rizvi SS. Rheological characterizations of texturized whey protein concentrate-based powders produced by reactive supercritical fluid extrusion. Food Res Int 2008. [DOI: 10.1016/j.foodres.2008.07.001] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Rosenkranz K, Kasper M, Werther J, Brunner G. Encapsulation of irregularly shaped solid forms of proteins in a high-pressure fluidized bed. J Supercrit Fluids 2008. [DOI: 10.1016/j.supflu.2007.11.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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31
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Akiyama Y, Fujita S, Senboku H, Rayner C, Brough S, Arai M. An in situ high pressure FTIR study on molecular interactions of ketones, esters, and amides with dense phase carbon dioxide. J Supercrit Fluids 2008. [DOI: 10.1016/j.supflu.2008.03.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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32
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Zhong Q, Jin M. Enhanced Functionalities of Whey Proteins Treated with Supercritical Carbon Dioxide. J Dairy Sci 2008; 91:490-9. [DOI: 10.3168/jds.2007-0663] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Lozano P, García-Verdugo E, Piamtongkam R, Karbass N, De Diego T, Burguete MI, Luis S, Iborra J. Bioreactors Based on Monolith-Supported Ionic Liquid Phase for Enzyme Catalysis in Supercritical Carbon Dioxide. Adv Synth Catal 2007. [DOI: 10.1002/adsc.200600554] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Lozano P, de Diego T, Iborra JL. Immobilization of Enzymes for Use in Supercritical Fluids. ACTA ACUST UNITED AC 2006. [DOI: 10.1007/978-1-59745-053-9_24] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
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Vezzù K, Zago V, Vittadello M, Bertucco A, Noto VD. Effect of subcritical CO2 on ionic conductivity of {Al[O(CH2CH2O)8.7]ρ/(LiClO4)z}n hybrid inorganic–organic networks. Electrochim Acta 2006. [DOI: 10.1016/j.electacta.2005.06.039] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Effect of subcritical CO2 on the structural and electrical properties of ORMOCERS-APE systems based on Zr and Al. Electrochim Acta 2005. [DOI: 10.1016/j.electacta.2005.02.061] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Tewes F, Boury F. Effect of H2O−CO2 Organization on Ovalbumin Adsorption at the Supercritical CO2−Water Interface. J Phys Chem B 2005; 109:1874-81. [PMID: 16851169 DOI: 10.1021/jp046940d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have studied the formation of water-CO(2) interfaces in the presence of different concentrations of ovalbumin (OVA) by tensiometry and by means of interfacial rheological measurements to obtain some information on the capacity of protein film to stabilize H(2)O in CO(2) emulsion. The formation of pure water-CO(2) interface can be described as a two-step phenomenon.(1) The CO(2) molecules adsorb onto the water surface and then a reorganization of the interface creates a H(2)O-CO(2) cluster network. This organization occurs at a temperature (40 degrees C) higher than the higher temperature limit (10 degrees C) allowing the formation of crystalline structure called CO(2) clathrate.(2) Our results show that ovalbumin adsorption from bulk concentrations higher than 0.0229 g/L inhibits the cluster formation for a CO(2) pressure less than 80 bar. However, for lower concentrations, the more the CO(2) pressure is close to 80 bar, the more OVA adsorption is reduced by the H(2)O-CO(2) cluster network. Moreover, from a pressure of 90 bar, the affinity of OVA for the interface increases and mixed films made of protein molecules and clusters are obtained for the OVA concentrations lower than 1 g/L.
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Affiliation(s)
- Frederic Tewes
- Ingénierie de la Vectorisation Particulaire, INSERM U 646, Bat. IBT, 10 rue A. Boquel, 49100 Angers, France
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High-pressure density and vapor–liquid equilibrium for the binary systems carbon dioxide–ethanol, carbon dioxide–acetone and carbon dioxide–dichloromethane. J Supercrit Fluids 2005. [DOI: 10.1016/j.supflu.2004.04.003] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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