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Payre B, Gontier E, Jarray A, Martinez Y, Laugier JP, Delalleau A, Gaillard BM, Anselme I, Goudounèche D, Fourquaux I, Hemati M, Gerbaud V, Delisle MB, Guilbeau-Frugier C. A new HPF specimen carrier adapter for the use of high-pressure freezing with cryoscanning electron microscope: two applications: stearic acid organization in a hydroxypropyl methylcellulose matrix and mice myocardium. J Microsc 2018; 271:255-265. [PMID: 29901222 DOI: 10.1111/jmi.12713] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 04/20/2018] [Accepted: 04/27/2018] [Indexed: 11/30/2022]
Abstract
Cryogenic transmission electron microscopy of high-pressure freezing (HPF) samples is a well-established technique for the analysis of liquid containing specimens. This technique enables observation without removing water or other volatile components. The HPF technique is less used in scanning electron microscopy (SEM) due to the lack of a suitable HPF specimen carrier adapter. The traditional SEM cryotransfer system (PP3000T Quorum Laughton, East Sussex, UK; Alto Gatan, Pleasanton, CA, USA) usually uses nitrogen slush. Unfortunately, and unlike HPF, nitrogen slush produces water crystal artefacts. So, we propose a new HPF specimen carrier adapter for sample transfer from HPF system to cryogenic-scanning electronic microscope (Cryo-SEM). The new transfer system is validated using technical two applications, a stearic acid in hydroxypropyl methylcellulose solution and mice myocardium. Preservation of samples is suitable in both cases. Cryo-SEM examination of HPF samples enables a good correlation between acid stearic liquid concentration and acid stearic occupation surface (only for homogeneous solution). For biological samples as myocardium, cytoplasmic structures of cardiomyocyte are easily recognized with adequate preservation of organelle contacts and inner cell organization. We expect this new HPF specimen carrier adapter would enable more SEM-studies using HPF.
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Affiliation(s)
- B Payre
- Centre de Microscopie Electronique Appliquée à la Biologie, Faculté de Médecine Rangueil, Toulouse III, P. Sabatier University, 31062, Toulouse, France
| | - E Gontier
- Bordeaux Imaging Center - UMS 3420-Université Bordeaux / CNRS / INSERM, F-33000, Bordeaux, France
| | - A Jarray
- LGC, INP, ENSIACET, 4 Allée Emile Monso, 31432, Toulouse, France
| | - Y Martinez
- CNRS, FR3450, Federation de recherche Agrobiosciences, Interactions, Biodiversité, BP 42617 Auzeville, F-31326, Castanet Tolosan, France
| | - J P Laugier
- Centre Commun de Microscopie Appliquée, Université de Nice-Sophia Antipolis, Nice, France
| | - A Delalleau
- Pixience, 12 rue Louis Courtois de Viçose, 31100, Toulouse, France
| | - B M Gaillard
- INRA, Centre Clermont-Ferrand - Theix, UMR1019, University of Clermont-Ferrand 1, UFR Médecine, UMR101, F-63000, Clermont-Ferrand, France
| | - I Anselme
- Centre de Microscopie Electronique Stéphanois - CMES-Saint Etienne, Université de Lyon, Saint-Etienne, France
| | - D Goudounèche
- Centre de Microscopie Electronique Appliquée à la Biologie, Faculté de Médecine Rangueil, Toulouse III, P. Sabatier University, 31062, Toulouse, France
| | - I Fourquaux
- Centre de Microscopie Electronique Appliquée à la Biologie, Faculté de Médecine Rangueil, Toulouse III, P. Sabatier University, 31062, Toulouse, France
| | - M Hemati
- LGC, INP, ENSIACET, 4 Allée Emile Monso, 31432, Toulouse, France
| | - V Gerbaud
- LGC, INP, ENSIACET, 4 Allée Emile Monso, 31432, Toulouse, France
| | - M B Delisle
- Centre de Microscopie Electronique Appliquée à la Biologie, Faculté de Médecine Rangueil, Toulouse III, P. Sabatier University, 31062, Toulouse, France.,CHU Toulouse and INSERM U 1037, Toulouse CEDEX, 31059, France
| | - C Guilbeau-Frugier
- Centre de Microscopie Electronique Appliquée à la Biologie, Faculté de Médecine Rangueil, Toulouse III, P. Sabatier University, 31062, Toulouse, France
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Kim YHB, Meyers B, Kim HW, Liceaga AM, Lemenager RP. Effects of stepwise dry/wet-aging and freezing on meat quality of beef loins. Meat Sci 2016; 123:57-63. [PMID: 27627781 DOI: 10.1016/j.meatsci.2016.09.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2016] [Revised: 08/16/2016] [Accepted: 09/06/2016] [Indexed: 02/04/2023]
Abstract
The objective of this study was to evaluate the effects of stepwise dry/wet-aging and freezing method on quality attributes of beef loins. Paired loins (M. Longissimus lumborum) from eight carcasses were assigned to either stepwise dry/wet-aging (carcass dry-aging for 10days then further wet-aging for 7days in vacuum bags) or carcass dry-aging only for 17days. Then, each loin was divided into three sections for freezing (never-frozen, blast or cryogenic freezing). Stepwise dry/wet-aged loin had lower purge/drip loss and shear force than conventionally dry-aged loin (P<0.05), but similar color and sensory characteristics (P>0.05). The cryogenic freezing resulted in a significant decrease in shear force values and a significant improvement in water-holding capacity (WHC). These findings indicate that the stepwise dry/wet-aging coupled with cryogenic freezing could provide beneficial impacts to the local meat industry by providing equivalent quality attributes as conventional dry-aging and improving WHC of frozen/thawed meat, while reducing the time needed for dry-aging.
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Affiliation(s)
- Yuan H Brad Kim
- Meat Science & Muscle Biology Lab, Department of Animal Sciences, Purdue University, West Lafayette, IN 47907, USA.
| | - Brandon Meyers
- Meat Science & Muscle Biology Lab, Department of Animal Sciences, Purdue University, West Lafayette, IN 47907, USA
| | - Hyun-Wook Kim
- Meat Science & Muscle Biology Lab, Department of Animal Sciences, Purdue University, West Lafayette, IN 47907, USA
| | - Andrea M Liceaga
- Sensory Evaluation Lab., Department of Food Science, Purdue University, West Lafayette, IN 47907, USA
| | - Ronald P Lemenager
- Meat Science & Muscle Biology Lab, Department of Animal Sciences, Purdue University, West Lafayette, IN 47907, USA
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