Results 51 to 60 of about 57,907 (324)

Process control of surface quality and part microstructure in selective laser sintering involving highly degraded polyamide 12 materials

Polymer Testing, 2021
Polyamide 12 is one of the most extensively used semi-crystalline polymer materials to date in selective laser sintering (SLS) additive manufacturing, or SLS 3D printing.
Feifei Yang, Tianyu Jiang, Greg Lalier, John Bartolone, Xu Chen   +4 more
doaj  

Solution-phase synthesis of pyrrole-imidazole polyamides [PDF]

, 2009
Pyrrole−imidazole polyamides are DNA-binding molecules that are programmable for a large repertoire of DNA sequences. Typical syntheses of this class of heterocyclic oligomers rely on solid-phase methods. Solid-phase methodologies offer rapid assembly on
Chenoweth, David M., Dervan, Peter B., Harki, Daniel A.   +2 more
core   +3 more sources

Molecular and macromolecular structure changes in polyamide 11 during thermal oxidation [PDF]

, 2014
The present article reports a study of thermal oxidation of unstabilized polyamide 11 films at several temperatures (90–165 °C) under atmospheric pressure and under various oxygen pressures (up to 1.6 MPa) at 110 °C.
FAYOLLE, Bruno, FERNAGUT, François, GUILMENT, Jean, OKAMBA-DIOGO, Octavie, RICHAUD, Emmanuel, VERDU, Jacques   +5 more
core   +6 more sources

Modulation of NF-κB-dependent gene transcription using programmable DNA minor groove binders [PDF]

, 2012
Nuclear factor κB (NF-κB) is a transcription factor that regulates various aspects of immune response, cell death, and differentiation as well as cancer.
Belitsky, Chen, Chenoweth, Dervan, Edelson, Eriksson, F. Yang, Gilmore, Gilmore, Grivennikov, Hsu, J. A. Raskatov, J. L. Meier, J. W. Puckett, Kannabiran, Karin, Kawahara, Kielkopf, Kunsch, Lam, Llorca, Matsuda, Nickols, P. B. Dervan, P. Ramakrishnan, Schneiderman, Sen, Sprengers, Trapnell, Vereecke, White   +30 more
core   +2 more sources

Repression of DNA-binding dependent glucocorticoid receptor-mediated gene expression [PDF]

, 2009
The glucocorticoid receptor (GR) affects the transcription of genes involved in diverse processes, including energy metabolism and the immune response, through DNA-binding dependent and independent mechanisms.
Belitsky, Bolton, De Bosscher, De Bosscher, Dervan, Gigu  re, Heck, Hermoso, Hsu, K. A. Muzikar, Kielkopf, Lampson, Lee, Li, McKay, N. G. Nickols, P. B. Dervan, Pratt, Reichardt, Ren, Spencer, Stockwell, Trauger, Wang, White, Wu, Young   +26 more
core   +2 more sources

Mechanical flexural ex vivo study of osteotomized swine femurs stabilized with two types of polyamide 12 rods

Ciência Rural
: Long bone fractures are commonly in surgery routine and several bone imobilization techniques are currently available. Technological progress has enabled to use low cost materials in surgical procedures.
Juliana Scarpa da Silveira Almeida, Débora de Oliveira Garcia, Renato Camargo Bortholin, Carlos Amaral Razzino, Cristiane dos Santos Honsho, Fernanda Gosuen Gonçalves Dias, Ewaldo de Mattos-Junior, Luis Gustavo Gosuen Gonçalves Dias   +7 more
doaj   +1 more source

Preparation of iron oxide–coated aramid fibres for improving the mechanical performance and flame retardancy of multi jet fusion–printed polyamide 12 composites

Virtual and Physical Prototyping, 2023
Multi jet fusion (MJF), a powder-based additive manufacturing technology, is suitable for fabricating fibre-reinforced polymer composites. However, the types of reinforcement fibres applied in MJF are limited due to the incompatibility between the fibres
Yanbei Hou, Ming Gao, Jiayao Chen, Wei Shian Tey, Mei Chen, Han Zheng, Boyuan Li, Lihua Zhao, Kun Zhou   +8 more
doaj   +1 more source

Development and Validation of a One‐Dimensional Finite Difference Simulation Scheme for Polymer Laser Powder Bed Fusion with Application to the Effect of the Inter Layer Time

Advanced Engineering Materials, EarlyView.
The study presents an efficient simulation approach for the polymer laser powder bed fusion process polymers process, validated with polyamide 12, polyamide 6, and polyetherketoneketone. It shows that inter layer time affects part density, with 90s yielding dense parts.
Claas Bierwisch, Bastien Dietemann, Moritz Grünewald, Christian Schlör, Johannes Rudloff   +4 more
wiley   +1 more source

Application of time–stress superposition to viscoelastic behavior of polyamide 6,6 fiber and its “true” elastic modulus [PDF]

, 2017
The viscoelastic behavior of semi-crystalline polyamide 6,6 fiber is exploited in viscoelastically prestressed polymeric matrix composites. To understand better the underlying prestress mechanisms, strain–time performance of the fiber material is ...
Babatope, Beijer, Bernstein, Bukošek, Chevali, Courtney, Crawford, Doolittle, Drozdov, Dunell, Fancey, Fancey, Fancey, Fancey, Fancey, Fancey, Fancey, Fancey, Fazal, Ferry, Ferry, Howard, Hunt, Jazouli, Lakes, Lewin, Luo, Marcellan, Murayama, O'Shaughnessy, Pang, Peterlin, Peterlin, Peterlin, Peterlin, Prevorsek, Raisch, Richeton, Schoeberle, Starkova, Tajvidi, Wang, Wang, Williams, Williams, Zhang, Zhou   +46 more
core   +1 more source

Applicability of polyamide 12 intramedullary locked rods in the stabilization of induced humeral fracture in cockerels (white plymouth rock) - in vivo study

Arquivo Brasileiro de Medicina Veterinária e Zootecnia
The aim of this study was to evaluate the use of polyamide 12 intramedullary rods in osteotomized humerus in cockerels (White Plymouth Rock) and analyze, by radiography and histopathology, bone consolidation and the formation of bone callus.
E.P. Cherobini, L.L. Carvalho, D.O. Garcia, F.G.G. Dias, C.A.S. Malta, A.C. Facin, E. Mattos-Junior, G.M. Magalhães, L.G.G.G. Dias   +8 more
doaj   +1 more source