Development of Chemically Modified CNF Reinforced Plastics

2019 ◽  
Vol 73 (2) ◽  
pp. 116-119
Author(s):  
Daisuke Kuroki
Keyword(s):  
Reinforced Plastics ◽  
Chemically Modified

Binding of Tissue Plasminogen Activator to Vascular Grafts

1989 ◽  
Vol 61 (01) ◽  
pp. 131-136 ◽  
Author(s):  
Richard A Harvey ◽  
Hugh C Kim ◽  
Jonathan Pincus ◽  
Stanley Z Trooskin ◽  
Josiah N Wilcox ◽  
...  
Keyword(s):  
Plasminogen Activator ◽  
Tissue Plasminogen Activator ◽  
Fibrinolytic Activity ◽  
Polymer Surface ◽  
Enzymic Activity ◽  
Vascular Prostheses ◽  
Chemically Modified ◽  
Insoluble Surfactant ◽  
Tissue Plasminogen

SummaryTissue plasminogen activator labeled with radioactive iodine (125I-tPA) was immobilized on vascular prostheses chemically modified with a thin coating of water-insoluble surfactant, tridodecylmethylammonium chloride (TDM AC). Surfactant- treated Dacron, polytetrafluoroethylene (PTFE), silastic, polyethylene and polyurethane bound appreciable amounts of 125I- tPA (5-30 μg 125I-tPA/cm2). Upon exposure to human plasma, the amount of 125I-tPA bound to the surface shows an initial drop during the first hour of incubation, followed by a slower, roughly exponential release with a t½ of appoximately 75 hours. Prostheses containing bound tPA show fibrinolytic activity as measured both by lysis of clots formed in vitro, and by hydrolysis of a synthetic polypeptide substrate. Prior to incubation in plasma, tPA bound to a polymer surface has an enzymic activity similar, if not identical to that of the native enzyme in buffered solution. However, exposure to plasma causes a decrease in the fibrinolytic activity of both bound tPA and enzyme released from the surface of the polymer. These data demonstrate that surfactant-treated prostheses can bind tPA, and that these chemically modified devices can act as a slow-release drug delivery system with the potential for reducing prosthesis-induced thromboembolism.

CARBON REINFORCED PLASTICS BASED ON POWDER POLYIMIDE BINDERS MODIFIED BY CARBON NANOCONES

2015 ◽  
Vol 1 (1) ◽  
pp. 38-44
Author(s):  
G. V. VAGANOV ◽  
◽  
V. E. YUDIN ◽  
V. YU ELOKHOVSKY ◽  
L. A. MYAGKOVA ◽  
...  
Keyword(s):  
Carbon Nanocones ◽  
Reinforced Plastics

Effect of Diamine Nature on Curing Kinetics of N,N'-Hexamethylene Bis(maleimide) and Properties of Glass-Reinforced Plastics

INEOS OPEN ◽  
2018 ◽  
Vol 1 (1) ◽  
pp. 64-70
Author(s):  
O. N. Zabegaeva ◽  
◽  
D. A. Sapozhnikov ◽  
B. A. Bayminov ◽  
S. A. Zinov'eva ◽  
...  
Keyword(s):  
Curing Kinetics ◽  
Reinforced Plastics ◽  
Kinetics Of

ROLE OF rhBMP-2 AND rhBMP-7 IN THE METABOLISM AND DIFFERENTIATION OF OSTEOBLAST-LIKE CELLS CULTURED ON CHEMICALLY MODIFIED TITANIUM SURFACES

2012 ◽  
pp. 141208072802005
Author(s):  
Fabiano Ribeiro Cirano ◽  
ADRIANE TOGASHI ◽  
MARCIA MARQUES ◽  
FRANCISCO PUSTIGLIONI ◽  
LUIZ LIMA
Keyword(s):  
Chemically Modified ◽  
Titanium Surfaces ◽  
Cells Cultured

Strength prediction of fiber reinforced plastics with a hole under compression-tension

AIAA Journal ◽  
2000 ◽  
Vol 38 ◽  
pp. 110-114
Author(s):  
C. Soutis ◽  
C. Filiou ◽  
V. Pateau
Keyword(s):  
Strength Prediction ◽  
Fiber Reinforced ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics

Aging of polymer composite materials under loading. (See Beginning in #10-2020)

2020 ◽  
pp. 2-12
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Polymer Composite ◽  
Polymer Composite Materials ◽  
Cyclic Loads ◽  
Reinforced Plastics ◽  
Water Exposure ◽  
Laboratory Conditions ◽  
Bending Loads ◽  
Moisture Conditions

A study review of aging polymer composite materials (PCM) under different heat-moisture conditions or water exposure with the sequential or parallel influence of static or cyclic loads in laboratory conditions is presented. The influence of tension and bending loads is compared. Conditions of the different load influence on parameters of carbon-reinforced plastics and glass-reinforced plastics are discussed. Equipment and units for climatic tests of PCM under loading are described. Simulation examples of indices of mechanical properties of PCM under the influence of environment and loads are shown.

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