This text discusses plasma-initiated polymerisation. This method of polymerisation is divided into 3"categorfes: polympri*ation of a vinyl monomer, ...
NASA Website
The time-resolved fluxes of negative polysilicon hydride ions from a power-modulated rf silane plasma have been measured by quadrupole mass spectrometry and modeled using a simple polymerisation scheme. Experiments were performed with plasma parameters su...
National Technical Information Service (NTIS)
In numerous experiments involving plasmas solid deposits are found which are often a nuisance and which have to be removed periodically. Analysis however, has revealed interesting properties: chemical stability, substrate adhesion, ease of production. A s...
[18] Ozawa [19] employed plasma polymerisation techniques using styrene and tetrafluoroethylene to make thin film insulators for micro capacitors ...
Deployment of light construction on the Moon surface after landing is a real way to create a Moon base. The construction has to be soft at deployment and hard at exploitation. A number of methods for solidification of deployed constructions in space was proposed, but the best way is a chemical reaction which leads to formation of the hard frame of space construction. The technology of large-size ...
NASA Astrophysics Data System (ADS)
... Accession Number : AD0606014. Title : THE LANGEVIN EQUATION AND THE AC CONDUCTIVITY OF NON-MAXWELLIAN PLASMAS,. ...
DTIC Science & Technology
... Title : High Frequency Properties of Electron Waveguides, AC- Admittance, Scattering Parameters, Plasma Oscillations. ...
... Abstract : An attempt was made to demonstrate the dynamic AC stabilization of the magnetic confinement of a plasma column in a theta-pinch ...
Experimental results from proton magnetic resonance absorption studies of ethyl acrylate during polymerization are reported. A 100 c cobalt-60 source was used in irradiations up to 2 x 10/sup 5/ r/hr. Resonance patterns varied with increasing gamma doses due to viscosity changes with polymerization. (A.C.)
Energy Citations Database
The tearing mode stability of the radial profiles of current density resulting from the skin effect accompanying AC modulation is calculated using a computer program. An AC component was superposed on the plasma current and a computer program was designed...
The use of cell sheets for tissue engineering applications has considerable advantages over single cell seeding techniques. So far, only thermoresponsive surfaces have been used to manufacture cell sheets without chemically disrupting the cell-surface interactions. Here, we present a new and facile technique to prepare sheets of epithelial cells using plasma ...
PubMed
Polyaniline is chemically synthesised and doped with camphor sulphonic acid. FTIR studies carried out on these samples indicate that the aromatic rings are retained after polymerisation. The percentage of crystallinity for polyaniline doped with camphor sulphonic acid has been estimated from the X-ray diffraction studies and is around 56% with respect to polyaniline emeraldine ...
... Accession Number : ADD427274. Title : Termination Mechanisms of the Radical Polymerisation of Acrylamide,. Corporate Author : ...
... DIFFERENTIAL EQUATIONS FOR POLYMERISATION KINETICS At 63 ... Ordinary Differential Equations for Polymerisation Kinetics ...
... Accession Number : ADA952810. Title : Cationic Polymerisation,. Corporate Author : PRINCETON UNIV NJ DEPT OF CHEMISTRY. ...
We find that plasma immersion ion implantation of polymer surfaces enhances their autohesive bond strength when pressed together by more than a factor of five. Both polymerising (CH4/O2) and nonpolymerising (Ar) plasmas are effective. There is currently no satisfactory theory for predicting this remarkable phenomenon. We propose that ...
Objective Clinical successful use of resin-based composite restorations (RBCs) depends on knowledge of material and light curing unit (LCU) related factors. The purpose of this study was to evaluate general dental practitioners' knowledge of polymerisation of RBCs and LCU technology.Methods Members of the Active Research Group of the Faculty of General Dental Practice (UK) in ...
The phenomena of electrical conductivity and diffusion in plasmas is analyzed. Expressions are derived for the DC and AC conductivity of anisotropic plasma, as well as of an anisotropic magnetoplasma, using the macroscopic equations pertinent to the cold ...
A quasi-steady-state alternating current (ac) plasma operation was achieved successfully on the HT-7 superconducting tokamak. It is found in ac plasmas that the particle confinement time of positive current plasma (?p ~ 17 ms) is lower than that of negative current (?p ~ 31 ms) ...
First, a short introduction to the field of fullerenes, fullerites, fullerides and carbon nanotubes is given. Then, the structures of polymerised C60 fullerite and polymerised AC60 alkali fullerides (A = K, Rb or Cs) are discussed. A microscopic Landau theory is presented to account for the specific orientations of the polymer chains ...
BackgroundThe mechanisms behind formation and filling of intracranial arachnoid cysts (AC) are poorly understood. The aim of this study was to evaluate AC fluid by proteomics to gain further knowledge about ACs. Two goals were set: 1) Comparison of AC fluid from individual patients to determine whether or not ...
PubMed Central
... Accession Number : ADD403401. Title : Polymerisation of benzyl acrylate. Part II. Solution polymerisation in ethyl acetate and n-hexane. ...
-3]. The atmospheric-pressure discharge plasmas afford new parameter regions, for example, (i) high density, (iiauthor's e-mail: hirai@plasma.ecei.tohoku.ac.jp Development of a Plasma Source Using Atmospheric, 997-8511, Japan (Received 22 April 2005 / Accepted 7 May 2005) A novel plasma source of atmospheric
E-print Network
An experiment was performed on the pulsator Tokamak at Garching in which an ac component was superposed on the plasma current. To interpret and plan these experiments, a computer program was developed to calculate the current distributions accompanying the ac modulation taking into account the skin effect. The experiments show that ...
The hydrophobic properties of polymeric surfaces may cause fogging in transparent packaging and poor adhesion to printing colours and coatings. Novel plasma processes for durable functionalization of polypropylene and polyethylene terephthalate substrates were developed and analysed using optical emission spectroscopy. A worm-like nano pattern was created on the polypropylene ...
An experiment was performed on the pulsator Tokamak at Garching in which an ac component was superposed on the plasma current. To interpret and plan these experiments, a computer program was developed to calculate the current distributions accompanying th...
... Maxwell's Equations; Electricity and Magnetism; Electromagnetic Frequency/Wavelength Bands; AC Circuits; Dimensionless Numbers of Fluid ...
Experiments are described on the excitation of compression waves in plasmas by transient phenomena such as shocks and arcs or by hydromagnetic instabilities. The possibility of powering them from an external source is suggested. (A.C.)
... and ac dielectric barrier discharges have been ... of three-dimensional plasma discharge on a ... Homogeneous Neumann conditions are applied to the ...
An atmospheric pressure non-thermal equilibrium pin corona plasma jet was used to deposit polymeric coatings from monomer precursor in both vapour and liquid aerosol states to allow a direct comparison of the quality and performance of the as-deposited coatings, specifically with respect to the achievement of soft plasma polymerisation ...
In this paper different types of surface modification of polyester cords by low-temperature plasma at atmospheric pressure was studied. The first type cords were activated by pulse surface positive corona discharge generated in a plasma reactor or by coplanar dielectric surface barier discharge (DCSBD) in nitrogen or ambient air ...
Comparison of luminosity-modulation switching principles in matrix displays showed that an AC-PDP (alternating-current plasma display panel) can produce 30 to 50-inch diagonal displays of superior motionpicture quality and of a low price. Comparison with a process plasma and a thermonuclear fusion plasma showed ...
Nitrogen (N)- and oxygen (O)-rich organic thin films were deposited by vacuum-ultraviolet (VUV)-assisted photo-chemical polymerisation of flowing ethylene (C2H4)-ammonia (NH3) and C2H4-nitrous oxide (N2O) mixtures of varying ratios, R, respectively. The reaction mechanism of these binary gas mixtures was investigated as a function of the wavelength, ?, of two ...
Thin films of the n-type, organic semiconductor PDI-8CN2 were thermally evaporated on two different dielectric surfaces and their optical and morphological properties investigated using Variable Angle Spectroscopic Ellipsometry (VASE) and Atomic Force Microscopy (AFM), respectively. The two dielectric surfaces used were SiO2 and a plasma polymer derived from the non-synthetic ...
at the injector end of the vessel (bottom in Figure 1). The plasma was fuelled by plasma injection guns6 locatedPrepared for the U.S. Department of Energy under Contract DE-AC02-76CH03073. Princeton Plasma Physics Laboratory Observation of Persistent Edge Current Driven by Coaxial Helicity Injection (CHI) D
in plasma. Z. Wang of LANL reported on the new Flowing Magnetized Plasma (FMP) experiment. A coaxial gun and a helical instability. At high , immediate detachment of the plasma from the gun with no column formationPREPARED FOR THE U.S. DEPARTMENT OF ENERGY, UNDER CONTRACT DE-AC02-76CH03073 PRINCETON ...
-up. 3.2 Ohmic Plasma Equilibrium - In Fig. 3, a comparison of visible light emission from the plasma of visible-light images of the evolution of the plasma boundary and EFIT magnetic reconstructionsPREPARED FOR THE U.S. DEPARTMENT OF ENERGY, UNDER CONTRACT DE-AC02-76CH03073 PRINCETON PLASMA
A low pressure capacitively coupled radio frequency discharge using 5% silane in argon is studied. Special emphasis is put on the initial stages of dust formation immediately after ignition of the discharge. The particle polymerisation process as well as the particle plasma interaction are studied. The latter is evident in changing electrical characterics ...
Microwave non thermal plasma irradiation was conducted on active carbon (AC) preliminarily impregnated with poly(vinyl alcohol) (PVA) in order to modify the adsorption properties of active carbon, particularly to increase hydrophobicity. The plasma was produced by applying microwave power on the PVA-impregnated active carbon ...
Plasma Facing Component Science and Technology for Burning Plasma Experiments December 11-13, 2000 M. Ulrickson Presented at the UFA Burning Plasma Workshop Sandia is a multiprogram laboratory contract DE-AC04-94AL85000. #12;MAU 12/8/00 2 � Burning plasma device designs � Pulse length ...
We have developed AC barrier low-frequency plasma source using AC (15kV, 60Hz) sources. Barrier material, such as rubber stabilizing the discharge plasma, is inserted between the electrodes. Large volume corona discharge was carried out at atmospheric pressure. Properties of AC barrier ...
The ac free-electron laser (ac FEL) uses an ac (temporally oscillating but spatially uniform) field as the pump source with the hope that electromagnetic radiation will be produced with wavelength shorter than that can be generated by a conventional magnet FEL. The ac field can be provided by a superconducting ...
DOE Information Bridge
Perturbation theory was used in investigating electromagnetic wave propagation in waveguides filled with a-c plasma. The phase shift and attenuation induced by plasma are calculated in first and second perturbation theory approximation. (tr-auth)
Apixaban is an oral, direct and highly selective factor Xa (FXa) inhibitor in late-stage clinical development. This study evaluated the in vitro effect of apixaban on human platelet aggregation induced by thrombin derived via the extrinsic pathway. Direct inhibitors of FXa (rivaroxaban), FVIIa (BMS-593214), thrombin (dabigatran, argatroban) and FXIa (BMS-262084) were included for comparison. ...
The results of original studies on the mechanism of formation of macromolecules in ionic systems are discussed. Amongst these are polymerisation involving living carbocation chains, cationic processes that occur via the activation of a monomer, anionic polymerisation initiated by aluminium and zinc porphyrins, group transfer ...
Increased absorption and excretion of iron were observed in AcPh-treated animals. Enhanced absorption was related to a decrease in the iron content of intestinal epithelial cells and an accelerated plasma iron turnover. Increased excretion of iron from Ac...
The relation between the AC-admittance of single mode electron waveguides is discussed in terms of the more complete scattering matrix of the same structure. For low frequencies, the admittance coincides with the series- inductance expressions in the lite...
The current rampdown phase followed by nondisruptive current termination is studied for future alternating current (AC) operations in the STOR-M tokamak. The plasma current is smoothly reduced to zero without disruptions with the rampdown rate of around m...
The clotting of C. V. Helleri plasma is not accelerated by the factor X activator or thrombin-like enzymes from its own venom. Clotting of the plasma is accelerated by the factor Xactivator from Russell's viper venom, but not by the thrombin-like enzyme from Agkistrodon Rhodostoma venom ("Arvin"). The prothrombin activator from the Taipan venom clots C.V. ...
The adsorbability of 1,1,1,2-tetrafluoroethane (HFC134a), which has been the CFC12 replacement, onto tetrafluoromethane and tetrachloromethane plasma-treated activated carbon (FT-ACs and CT-ACs) was investigated. It is proved that the fluorine and the chlorine, which were produced by plasma treatment, were included ...
