Results 41 to 50 of about 1,759,920 (268)

Thermal Breakage and Self-Healing of a Polymer Chain under Tensile Stress [PDF]

J. Chem. Phys. 132, 204902 (2010), 2010
We consider the thermal breakage of a tethered polymer chain of discrete segments coupled by Morse potentials under constant tensile stress. The chain dynamics at the onset of fracture is studied analytically by Kramers-Langer multidimensional theory and by extensive Molecular Dynamics simulations in 1D- and 3D-space. Comparison with simulation data in
arxiv   +1 more source

Cartilage to bone transformation during fracture healing is coordinated by the invading vasculature and induction of the core pluripotency genes

Development, 2017
Fractures heal predominantly through the process of endochondral ossification. The classic model of endochondral ossification holds that chondrocytes mature to hypertrophy, undergo apoptosis and new bone forms by invading osteoprogenitors.
D. Hu, Federico Ferro, Frank Yang, Aaron J. Taylor, Wenhan Chang, T. Miclau, R. Marcucio, Chelsea S. Bahney   +7 more
semanticscholar   +1 more source

Experimemtal Investigations Into the Healing of Fractures [PDF]

Acta Orthopaedica Scandinavica, 1950
(1950). Experimemtal Investigations Into the Healing of Fractures. Acta Orthopaedica Scandinavica: Vol. 19, No. 4, pp. 433-475.
Viggo Eskklund, Claus Munk Plum
openaire   +4 more sources

Tough self-healing elastomers by molecular enforced integration of covalent and reversible networks [PDF]

, 2017
Self-healing polymers crosslinked by solely reversible bonds are intrinsically weaker than common covalently crosslinked networks. Introducing covalent crosslinks into a reversible network would improve mechanical strength. It is challenging, however, to apply this design concept to dry elastomers, largely because reversible crosslinks such as hydrogen
arxiv   +1 more source

Unravelling brittle fracture statistics out of self-healing patterns forming during femtosecond laser exposure [PDF]

Phys. Rev. Applied 8, 054013 (2017), 2017
Femtosecond laser written patterns at the surface of brittle materials may show a regenerative random transition from self-organized to disordered structures. Here, we show that this random intermittent behaviour carries relevant fracture statistics information, such as the so-called Weibull parameters.
arxiv   +1 more source

Osteogenic Differentiation of Periosteal Cells During Fracture Healing

Journal of Cellular Physiology, 2017
Five to ten percent of fractures fail to heal normally leading to additional surgery, morbidity, and altered quality of life. Fracture healing involves the coordinated action of stem cells primarily coming from the periosteum which differentiate into the
Tao Wang, Xinping Zhang, D. Bikle
semanticscholar   +1 more source

Fracture healing following high energy tibial trauma: Ilizarov versus Taylor Spatial Frame [PDF]

, 2014
Introduction: The optimal treatment of high energy tibial fractures remains controversial and a challenging orthopaedic problem. The role of external fi xators for all these tibial fractures has been shown to be crucial. Methods: A fi ve-year consecutive
AS Rigby, CU Menakaya, E Barron, Edwards CC, Fleming B, H Sharma, Helfet DL, Inan M, Kakar S, Sarmiento A, Woll TS, Y Hadland   +11 more
core   +1 more source

T-Lymphocytes Enable Osteoblast Maturation via IL-17F during the Early Phase of Fracture Repair [PDF]

, 2012
While it is well known that the presence of lymphocytes and cytokines are important for fracture healing, the exact role of the various cytokines expressed by cells of the immune system on osteoblast biology remains unclear.
A Hiltunen, A Kimura, A Nazarian, A Neve, A Wallace, AA Askalonov, AX Le, B Ganss, B Le Goff, Benjamin Alman, BF Boyce, Cari Whyne, CJ Hauser, D Kabelitz, D Toben, David Silkstone, David Wright, Diane Nam, E Terpos, Elaine Mau, GE Glass, H Huang, H-C Pape, Heather Whetstone, J Lange, J Lorenzo, J Lorenzo, J Marvel, J Richardson, JG Andrew, K Shoji, LC Gerstenfeld, NT Colburn, O Bastian, Oliver Frey, P Kolar, P Mombaerts, PM Mountziaris, R Pacifici, R Pappu, RM Nepal, S Itoh, S Kitami, SM van Gaalen, SS Cheon, T Nakashima, T Yago, T-J Cho, V Entezari, X Yang, Y Chen, Y Hu, Y Shinkai, Yufa Wang, Z Xing   +54 more
core   +8 more sources

The crucial role of neutrophil granulocytes in bone fracture healing.

European Cells & Materials, 2016
Delayed bone fracture healing and the formation of non-unions represent an important clinical problem, particularly in polytrauma patients who suffer from posttraumatic systemic inflammation.
A. Kovtun, Stephanie Bergdolt, R. Wiegner, P. Radermacher, Markus Huber-Lang, Anita Ignatius   +5 more
semanticscholar   +1 more source

Anisotropy in Fracking: A Percolation Model for Observed Microseismicity [PDF]

, 2014
Hydraulic fracturing (fracking) using high pressures and a low viscosity fluid allow the extraction of large quantiles of oil and gas from very low permeability shale formations. The initial production of oil and gas at depth leads to high pressures and an extensive distribution of natural fractures which reduce the pressures. With time these fractures
arxiv   +1 more source