Chemical reaction in electric discharges. Part. IV. The negative glow reaction in hydrogen-oxygen mixtures

1940 ◽  
Vol 36 ◽  
pp. 1087 ◽  
Author(s):  
R. Winstanley Lunt ◽  
T. G. Pearson ◽  
B. Topley
Keyword(s):  
Chemical Reaction ◽  
Electric Discharges ◽  
Negative Glow

scholarly journals On chemical reaction in the electric discharge. I—The chemical effects of impulse discharges

1935 ◽  
Vol 152 (875) ◽  
pp. 158-171 ◽  
Keyword(s):  
Chemical Reaction ◽  
Electric Discharge ◽  
Discharge Tube ◽  
Atomic Hydrogen ◽  
Electric Discharges ◽  
Active Nitrogen ◽  
Atom Concentration ◽  
Chemical Effects ◽  
Spark Gap ◽  
In Series

Although a very large number of studies has been made upon the chemical reactions which can be induced by electric discharges, the effects of controlled condenser sparks appear to have been neglected, with one exception. Wrede has shown that if a large condenser (8 mfd) is charged to a high potential, and then allowed to discharge through a gas at low pressure, a spark gap being inserted in series with the discharge tube proper to increase the breakdown voltage, then hydrogen, oxygen, and nitrogen may be dissociated to the extent of 80, 60, and 40% respectively, the atom concentration being measured upon a most ingenious “diffusion gauge.” The Wrede discharge has been extensively employed by Steiner and his associates in a series of semi-spectroscopic investigations upon active nitrogen and atomic hydrogen, but its use as a means of effecting chemical reaction has not so far received attention.

New replica method with plasma polymerized film by glow discharge

1988 ◽  
Vol 46 ◽  
pp. 414-415
Author(s):  
A. Tanaka ◽  
M. Yamaguchi ◽  
T. Hirano
Keyword(s):  
Power Supply ◽  
Plasma Polymerization ◽  
Vacuum Chamber ◽  
Complex Surface ◽  
Replica Method ◽  
Metal Extraction ◽  
High Voltage Power Supply ◽  
Negative Glow ◽  
Hydrocarbon Gas ◽  
Hydrocarbon Molecules

The plasma polymerization replica method and its apparatus have been devised by Tanaka (1-3). We have published several reports on its application: surface replicas of biological and inorganic specimens, replicas of freeze-fractured tissues and metal-extraction replicas with immunocytochemical markers.The apparatus for plasma polymerization consists of a high voltage power supply, a vacuum chamber containing a hydrocarbon gas (naphthalene, methane, ethylene), and electrodes of an anode disk and a cathode of the specimen base. The surface replication by plasma polymerization in negative glow phase on the cathode was carried out by gassing at 0.05-0.1 Torr and glow discharging at 1.5-3 kV D.C. Ionized hydrocarbon molecules diffused into complex surface configurations and deposited as a three-dimensionally polymerized film of 1050 nm in thickness.The resulting film on the complex surface had uniform thickness and showed no granular texture. Since the film was chemically inert, resistant to heat and mecanically strong, it could be treated with almost any organic or inorganic solvents.

Directional observation on lipid of male nectary of Lindera megaphylla hemsl. by the rapid embedding method with polyethylene glycol (PEG)

1990 ◽  
Vol 48 (3) ◽  
pp. 718-719
Author(s):  
Dai Dalin ◽  
Guo Jianmin
Keyword(s):  
Electron Microscope ◽  
Polyethylene Glycol ◽  
Chemical Reaction ◽  
Traditional Method ◽  
Osmium Tetroxide ◽  
Unsaturated Lipid ◽  
Embedding Method ◽  
Long Period ◽  
New Methods

Lipid cytochemistry has not yet advanced far at the EM level. A major problem has been the loss of lipid during dehydration and embedding. Although the adoption of glutaraldehyde and osmium tetroxide accelerate the chemical reaction of lipid and osmium tetroxide can react on the double bouds of unsaturated lipid to from the osmium black, osmium tetroxide can be reduced in saturated lipid and subsequently some of unsaturated lipid are lost during dehydration. In order to reduce the loss of lipid by traditional method, some researchers adopted a few new methods, such as the change of embedding procedure and the adoption of new embedding media, to solve the problem. In a sense, these new methods are effective. They, however, usually require a long period of preparation. In this paper, we do research on the fiora nectary strucure of lauraceae by the rapid-embedding method wwith PEG under electron microscope and attempt to find a better method to solve the problem mentioned above.

CONSTRICTION AND STRIATIONS IN ELECTRIC DISCHARGES

1980 ◽  
Vol 41 (C9) ◽  
pp. C9-325-C9-333 ◽  
Author(s):  
Y. Crispin ◽  
E. Wasserstrom
Keyword(s):  
Electric Discharges
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