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Total 154 results found since Jan 2013.

Glycosaminoglycan-based hybrid hydrogel encapsulated with polyelectrolyte complex nanoparticles for endogenous stem cell regulation in central nervous system regeneration.
Abstract The poor regenerative capability of stem cell transplantation in the central nervous system limits their therapeutic efficacy in brain injuries. The sustained inflammatory response, lack of structural support, and trophic factors deficiency restrain the integration and long-term survival of stem cells. Instead of exogenous stem cell therapy, here we described the synthesis of nanohybrid hydrogel containing sulfated glycosaminoglycan-based polyelectrolyte complex nanoparticles (PCN) to mimic the brain extracellular matrix and control the delivery of stromal-derived factor-1α (SDF-1α) and basic fibroblast...
Source: Biomaterials - May 8, 2018 Category: Materials Science Authors: Jian WH, Wang HC, Kuan CH, Chen MH, Wu HC, Sun JS, Wang TW Tags: Biomaterials Source Type: research

Performance evolution of a worn piston ring
Publication date: October 2018 Source:Tribology International, Volume 126 Author(s): W. Ma, N. Biboulet, A.A. Lubrecht Reducing the fuel consumption of a combustion engine has been an important design issue. Engine friction has to be reduced and the piston ring - cylinder liner contact is a major source of friction. However, the piston ring geometry can evolve due to wear, and the ring can acquire a flat part. The current work analytically studies the hydrodynamic friction and load carrying capacity of a twisted parabolic - flat (worn) piston ring. The outcome is presented as a function of twist angle, total width and fla...
Source: Tribology International - May 26, 2018 Category: Materials Science Source Type: research

Evolutions of cylinder liner surface texture and tribological performance of piston ring-liner assembly
Publication date: Available online 7 July 2018Source: Tribology InternationalAuthor(s): Wieslaw Grabon, Pawel Pawlus, Slawomir Wos, Waldemar Koszela, Michal WieczorowskiAbstractThis paper presents the results of the tribological experiments conducted using an oscillating wear tester under lubricated conditions. Specimen from piston ring slid against counter-specimen from cylinder liner. Various surface textures of cylinder liners resulted from honing and/or plateau honing. Tests were carried out for two normal loads of 100 and 300 N at a temperature of 80 °C, the stroke was 3 mm, the frequency was 10 Hz. Each ex...
Source: Tribology International - July 7, 2018 Category: Materials Science Source Type: research

Performance evolution of a worn piston ring
Publication date: October 2018Source: Tribology International, Volume 126Author(s): W. Ma, N. Biboulet, A.A. LubrechtAbstractReducing the fuel consumption of a combustion engine has been an important design issue. Engine friction has to be reduced and the piston ring - cylinder liner contact is a major source of friction. However, the piston ring geometry can evolve due to wear, and the ring can acquire a flat part. The current work analytically studies the hydrodynamic friction and load carrying capacity of a twisted parabolic - flat (worn) piston ring. The outcome is presented as a function of twist angle, total width an...
Source: Tribology International - July 10, 2018 Category: Materials Science Source Type: research

Evolutions of cylinder liner surface texture and tribological performance of piston ring-liner assembly
Publication date: Available online 7 July 2018Source: Tribology InternationalAuthor(s): Wieslaw Grabon, Pawel Pawlus, Slawomir Wos, Waldemar Koszela, Michal WieczorowskiAbstractThis paper presents the results of the tribological experiments conducted using an oscillating wear tester under lubricated conditions. Specimen from piston ring slid against counter-specimen from cylinder liner. Various surface textures of cylinder liners resulted from honing and/or plateau honing. Tests were carried out for two normal loads of 100 and 300 N at a temperature of 80 °C, the stroke was 3 mm, the frequency was 10 Hz. Each ex...
Source: Tribology International - July 10, 2018 Category: Materials Science Source Type: research

Fabrication and Processing of Metallurgically Bonded Copper Bimetal Sheets
Publication date: Available online 6 August 2018Source: Journal of Materials Processing TechnologyAuthor(s): Tim Mittler, Thomas Greß, Martin Feistle, Michael Krinninger, Uwe Hofmann, Joachim Riedle, Roland Golle, Wolfram VolkAbstractA novel process chain for the production of metallurgically bonded copper bimetal parts was developed and investigated. This process chain offers a high potential for being an energy- and resource-efficient alternative to cold roll bonding. Research activities in the present paper focused on both the initial bonding between pure copper and tin bronze using horizontal continuous compound casti...
Source: Journal of Materials Processing Technology - August 7, 2018 Category: Materials Science Source Type: research

Design of lactoferrin modified lipid nano-carriers for efficient brain-targeted delivery of nimodipine
Publication date: 1 November 2018Source: Materials Science and Engineering: C, Volume 92Author(s): Chaoyue Zhao, Jiulong Zhang, Haiyang Hu, Mingxi Qiao, Dawei Chen, Xiuli Zhao, Chunrong YangAbstractBlood-brain barrier (BBB) was the major obstacle for efficient delivery of therapeutic agents to brain tissue. To overcome this barrier, a novel lactoferrin modified long circulation nanostructured lipid carriers (Lf-NLC) was designed and synthesized for the efficient delivery of neuroprotective agent nimodipine (NMD) to brain tissue. NMD loaded Lf-NLC was optimized to exhibit a small and uniform particle size distribution and h...
Source: Materials Science and Engineering: C - September 1, 2018 Category: Materials Science Source Type: research

ASAP Tissue Plasminogen Activator-Porous Magnetic Microrods for Targeted Thrombolytic Therapy after Ischemic Stroke
ACS Applied Materials& InterfacesDOI: 10.1021/acsami.8b09423
Source: ACS Applied Materials and Interfaces - September 19, 2018 Category: Materials Science Authors: Jiangnan Hu, Shengwei Huang, Lu Zhu, Weijie Huang, Yiping Zhao, Kunlin Jin, Qichuan ZhuGe Source Type: research

Biohybrids of scaffolding hyaluronic acid biomaterials plus adipose stem cells home local neural stem and endothelial cells: Implications for reconstruction of brain lesions after stroke
Journal of Biomedical Materials Research Part B: Applied Biomaterials, EarlyView.
Source: Journal of Biomedical Materials Research Part B: Applied Biomaterials - October 11, 2018 Category: Materials Science Authors: Leyre Sanchez ‐Rojas, Ulises Gómez‐Pinedo, María Soledad Benito‐Martin, Gonzalo León‐Espinosa, Fernando Rascón‐Ramirez, Cristina Lendinez, Cristina Martínez‐Ramos, Jorge Matías‐Guiu, Manuel Monleón Pradas, Juan A. Barcia Source Type: research

The effects of lubricants on temperature distribution of 6063 aluminium alloy during backward cup extrusion process
Publication date: Available online 22 October 2018Source: Journal of Materials Research and TechnologyAuthor(s): Omolayo M. Ikumapayi, Sunday T. Oyinbo, Ojo P. Bodunde, Sunday A. Afolalu, Imhade P. Okokpujie, Esther T. AkinlabiAbstractBackward extrusion has received several applications in the production and manufacturing sectors, most importantly in the bulk forming processes and various researchers have carried out several studies about backward extrusion processes in the time past varying from experimental, theoretical, empirical, analytical to numerical methods in order to analyze and optimize it. In this present inves...
Source: Journal of Materials Research and Technology - October 23, 2018 Category: Materials Science Source Type: research

Effects of Partial Addition of Butanol in a Rubber seed Oil Methyl Ester Diesel Blend
Publication date: 2018Source: Materials Today: Proceedings, Volume 5, Issue 11, Part 2Author(s): V.V. Patil, R.S. PatilAbstractExperiments were conducted to obtain the performance and emission characteristics of rubber seed oil methyl ester (ROME) - diesel blend with partial addition of butanol [ROME (40%) + Diesel (40%) + Butanol (20%)] in a single cylinder four stroke diesel engine at constant speed. Performance and emission characteristics of butanol added in ROME-diesel blend were compared with the characteristics of diesel-butanol blend [Diesel (80%) + Butanol (20%)] and diesel (100%), by varying the load on engine [n...
Source: Materials Today: Proceedings - December 6, 2018 Category: Materials Science Source Type: research

Alleviation of Mechanical Allodynia by 14,15-Epoxyeicosatrienoic Acid in a Central Poststroke Pain Model: Possible Role of Allopregnanolone and δ-Subunit-Containing Gamma-Aminobutyric Acid A Receptors
Central poststroke pain (CPSP) is a neuropathic pain syndrome arising after a lesion of the central nervous system (CNS) owing to cerebrovascular insult. This syndrome is characterized by somatosensory abnormalities, including spontaneous pain, hyperalgesia, and allodynia, which localized to body areas corresponding to the injured brain region.2 These conditions are constant and could impair the activities of daily living, consequently undermine the quality of life and rehabilitation process. However, CPSP is probably the least-recognized complication of stroke and its mechanism has not been studied adequately to date.
Source: The Journal of Pain - November 27, 2018 Category: Materials Science Authors: Xuhui Chen, Zuofan Li, Bo Zhang, Rong Hu, Jiayan Li, Miaomiao Feng, Wenlong Yao, Chuanhan Zhang, Li Wan, Yue Zhang Tags: Original Reports Source Type: research

Surface evaluation of titanium oxynitride coatings used for developing layered cardiovascular stents
Publication date: June 2019Source: Materials Science and Engineering: C, Volume 99Author(s): Nataliia Beshchasna, Au Yeung Kwan Ho, Muhammad Saqib, Honorata Kraśkiewicz, Łukasz Wasyluk, Oleg Kuzmin, Oana Cristina Duta, Denisa Ficai, Roxana Doina Trusca, Anton Ficai, Vladimir F. Pichugin, Jörg Opitz, Ecaterina AndronescuAbstractStents are important medical devices used to increase the quality and life expectancy of patients with heart diseases and stroke, leading causes of death, worldwide. In order to minimize the risk of restenosis, different coating on bare metal stents (BMS) such as polymer coatings; titanium dioxide...
Source: Materials Science and Engineering: C - February 2, 2019 Category: Materials Science Source Type: research

Production of biodiesel from Cordiamyxa bio-oil using BaMoO4-Ce2O3 nanoparticles as an alternative fuel for Diesel Engine
Publication date: Available online 2 February 2019Source: Materials LettersAuthor(s): M. KarthikeyanAbstractIn recent years, the production of biodiesel has rapidly increased due to its benefits and to resolve the problem findings present in environmental pollution. In, this study barium salts doped with cerium oxide are used as a heterogeneous catalyst for the production of biodiesel from Cordiamyxa oil. The synthesized BaMoO4-Ce2O3 nanocatalyst has characterized by XRD (X-ray powder diffraction) and SEM (Scanning Electron Microscope) analysis. Methanol to a molar ratio of oil from 12:1 to 16:1 has studied and got the opt...
Source: Materials Letters - February 3, 2019 Category: Materials Science Source Type: research