scholarly journals Synthesis and Mechanical Characterization of Chitosan Threads for Biomedical Applications

2019 ◽  
Vol 148 (1) ◽  
pp. 15-23
Author(s):  
I. Rodriguez ◽  
O. Rivera-Debernardi ◽  
A. Rosillo ◽  
I. Delgadillo-Holtfort ◽  
J. Delgado
Keyword(s):  
Biomedical Applications ◽  
Mechanical Characterization

Mechanical Characterization of UV Photopolymerized PMMA with Different Photo-Initiator Concentration

2021 ◽  
Vol 903 ◽  
pp. 11-16
Author(s):  
M.A. Manjunath ◽  
K. Naveen ◽  
Prakash Vinod ◽  
N. Balashanmugam ◽  
M.R. Shankar
Keyword(s):  
Mechanical Properties ◽  
Light Source ◽  
Polymethyl Methacrylate ◽  
Biomedical Applications ◽  
Mechanical Characterization ◽  
Uv Light ◽  
Curing Time ◽  
Uv Led ◽  
Pmma Resin

Polymethyl methacrylate (PMMA) is one among few known photo-polymeric resin useful in lithography for fabricating structures having better mechanical properties to meet the requirement in electronics and biomedical applications. This study explores the effect of Photo Initiator (PI) concentration and also curing time on strength and hardness of Polymethyl methacrylate (PMMA) obtained by UV photopolymerization of Methyl methacrylate (MMA) monomer. The UV LED light source operating at the wavelength of 364 nm is used with Benzoin Ethyl Ether (BEE) as photo initiator. The curing of PMMA resin is supported with peltier cooling device placed at the bottom of the UV light source. The characterisation study of UV photo cured PMMA is analysed through nano indenter (Agilent Technologies-G200). The current work investigates the influence of PI concentration and curing time in achieving maximum mechanical properties for UV photopolymerized PMMA.

scholarly journals Photoacoustic viscoelasticity imaging dedicated to mechanical characterization of biological tissues

2017 ◽  
Vol 10 (04) ◽  
pp. 1730005 ◽  
Author(s):  
Yujiao Shi ◽  
Fen Yang ◽  
Qian Wang
Keyword(s):  
Medical Diagnosis ◽  
Biomedical Applications ◽  
Phase Contrast ◽  
Mechanical Characterization ◽  
Biological Tissues ◽  
Physical Parameters ◽  
Mathematical Relationship ◽  
Vascular Endoscopy ◽  
Photoacoustic Measurement

Since changes in mechanical properties of biological tissues are often closely related to pathology, the viscoelastic properties are important physical parameters for medical diagnosis. A photoacoustic (PA) phase-resolved method for noninvasively characterizing the biological tissue viscoelasticity has been proposed by Gao et al. [G. Gao, S. Yang, D. Xing, “Viscoelasticity imaging of biological tissues with phase-resolved photoacoustic measurement,” Opt. Lett. 36, 3341–3343 (2011)]. The mathematical relationship between the PA phase delay and the viscosity–elasticity ratio has been theoretically deduced. Moreover, systems of PA viscoelasticity (PAVE) imaging including PAVE microscopy and PAVE endoscopy were developed, and high-PA-phase contrast images reflecting the tissue viscoelasticity information have been successfully achieved. The PAVE method has been developed in tumor detection, atherosclerosis characterization and related vascular endoscopy. We reviewed the development of the PAVE technique and its applications in biomedical fields. It is believed that PAVE imaging is of great potential in both biomedical applications and clinical studies.

Development by robocasting and mechanical characterization of hybrid HA/PCL coaxial scaffolds for biomedical applications

2019 ◽  
Vol 39 (14) ◽  
pp. 4375-4383 ◽  
Author(s):  
Claudia Paredes ◽  
Francisco J. Martínez-Vázquez ◽  
Antonia Pajares ◽  
Pedro Miranda
Keyword(s):  
Biomedical Applications ◽  
Mechanical Characterization

Nano-mechanical Characterization of Mg-Zn-Mn-Si Alloy Fabricated by Spark Plasma Sintering for Biomedical Applications

2018 ◽  
Vol 5 (14) ◽  
pp. 27742-27748 ◽  
Author(s):  
Bhupinderpal Singh ◽  
Ramandeep Singh ◽  
J.S. Mehta ◽  
Anjali Gupta ◽  
Manjeet Singh ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Biomedical Applications ◽  
Mechanical Characterization ◽  
Plasma Sintering ◽  
Spark Plasma

Spectro-mechanical Characterization of Aromaticity and Maturity of Kerogens in Oil Shale at 6 nm Spatial Resolution

2018 ◽  
Author(s):  
Devon Jakob ◽  
Le Wang ◽  
Haomin Wang ◽  
Xiaoji Xu
Keyword(s):  
Spatial Resolution ◽  
Oil Shale ◽  
Infrared Imaging ◽  
Mechanical Characterization ◽  
Optical Diffraction ◽  
Chemical Compositions ◽  
Valuable Insight ◽  
Eagle Ford Shale

<p>In situ measurements of the chemical compositions and mechanical properties of kerogen help understand the formation, transformation, and utilization of organic matter in the oil shale at the nanoscale. However, the optical diffraction limit prevents attainment of nanoscale resolution using conventional spectroscopy and microscopy. Here, we utilize peak force infrared (PFIR) microscopy for multimodal characterization of kerogen in oil shale. The PFIR provides correlative infrared imaging, mechanical mapping, and broadband infrared spectroscopy capability with 6 nm spatial resolution. We observed nanoscale heterogeneity in the chemical composition, aromaticity, and maturity of the kerogens from oil shales from Eagle Ford shale play in Texas. The kerogen aromaticity positively correlates with the local mechanical moduli of the surrounding inorganic matrix, manifesting the Le Chatelier’s principle. In situ spectro-mechanical characterization of oil shale will yield valuable insight for geochemical and geomechanical modeling on the origin and transformation of kerogen in the oil shale.</p>

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