The micromechanical properties of agricultural products can be used to formulate simulation models and optimize processing parameters for harvest,packaging,and storage.In this study,a detection platform was designed f...The micromechanical properties of agricultural products can be used to formulate simulation models and optimize processing parameters for harvest,packaging,and storage.In this study,a detection platform was designed for conducting mechanical tests on different specimens at the tissue level.The system provided controllable and precise displacements;the relative error was less than±1.0%.The displacement and force measurements were calibrated.Micromechanical tests of apple parenchyma tissues were conducted to evaluate the performance of the proposed platform.The stress-strain curves of the specimens and the micrographs of the microstructures can be obtained simultaneously during the tests.The proposed platform has the capability to test mechanical properties and obtain micro behaviors of agricultural products at the tissue level,which helps in studying the failure mechanism of agricultural products under external loading.展开更多
Collagen is one of the most important biomaterials for tissue engineering approaches.Despite its excellent biocompatibility,it shows the non-negligible disadvantage of poor mechanical stability.Photochemical crosslink...Collagen is one of the most important biomaterials for tissue engineering approaches.Despite its excellent biocompatibility,it shows the non-negligible disadvantage of poor mechanical stability.Photochemical crosslinking with rose bengal and green light(RGX)is an appropriate method to improve this property.The development of collagen laminates is helpful for further adjustment of the mechanical properties as well as the controlled release of incorporated substances.In this study,we investigate the impact of crosslinking and layering of two different collagen scaffolds on the swelling behavior andmechanical behavior inmicro tensile tests to obtain information on its wearing comfort(stiffness,strength and ductility).The mechanical stability of the collagen material after degradation due to cell contact is examined using thickness measurements.There is no linear increase or decrease due to layering homologous laminates.Unexpectedly,a decrease in elongation at break,Young’s modulus and ultimate tensile strength are measured when the untreated monolayer is compared to the crosslinked one.Furthermore,we can detect a connection between stability and cell proliferation.The results show that with variation in number and type of layers,collagen scaffolds with tailored mechanical properties can be produced.Such a multi-layered structure enables the release of biomolecules into inner or outer layers for biomedical applications.展开更多
基金the National Natural Science Foundation of China for the financial support of the project“Study on kinematics and dynamics of pollen and pneumatic pollination method in hybrid rice seed production”(Grant No.31971796)supported by the Earmarked Fund of CARS-01.
文摘The micromechanical properties of agricultural products can be used to formulate simulation models and optimize processing parameters for harvest,packaging,and storage.In this study,a detection platform was designed for conducting mechanical tests on different specimens at the tissue level.The system provided controllable and precise displacements;the relative error was less than±1.0%.The displacement and force measurements were calibrated.Micromechanical tests of apple parenchyma tissues were conducted to evaluate the performance of the proposed platform.The stress-strain curves of the specimens and the micrographs of the microstructures can be obtained simultaneously during the tests.The proposed platform has the capability to test mechanical properties and obtain micro behaviors of agricultural products at the tissue level,which helps in studying the failure mechanism of agricultural products under external loading.
基金supported by the Deutsche Forschungsgemeinschaft(Project number:400569699).
文摘Collagen is one of the most important biomaterials for tissue engineering approaches.Despite its excellent biocompatibility,it shows the non-negligible disadvantage of poor mechanical stability.Photochemical crosslinking with rose bengal and green light(RGX)is an appropriate method to improve this property.The development of collagen laminates is helpful for further adjustment of the mechanical properties as well as the controlled release of incorporated substances.In this study,we investigate the impact of crosslinking and layering of two different collagen scaffolds on the swelling behavior andmechanical behavior inmicro tensile tests to obtain information on its wearing comfort(stiffness,strength and ductility).The mechanical stability of the collagen material after degradation due to cell contact is examined using thickness measurements.There is no linear increase or decrease due to layering homologous laminates.Unexpectedly,a decrease in elongation at break,Young’s modulus and ultimate tensile strength are measured when the untreated monolayer is compared to the crosslinked one.Furthermore,we can detect a connection between stability and cell proliferation.The results show that with variation in number and type of layers,collagen scaffolds with tailored mechanical properties can be produced.Such a multi-layered structure enables the release of biomolecules into inner or outer layers for biomedical applications.
