Heats of immersion of boron phosphates in pyridine and magnesia in benzoic acid solution

1980 ◽  
Vol 40 (2) ◽  
pp. 261-267 ◽  
Author(s):  
M. Hattori ◽  
T. Tamamoto
Keyword(s):  
Benzoic Acid ◽  
Acid Solution ◽  
Heats Of Immersion ◽  
Boron Phosphates

Improved critical current densities in ex situ processed MgB2 tapes fabricated with chemically treated powder

2007 ◽  
Vol 22 (5) ◽  
pp. 1281-1285 ◽  
Author(s):  
H. Fujii ◽  
K. Togano ◽  
K. Ozawa
Keyword(s):  
Critical Current Density ◽  
Benzoic Acid ◽  
Acid Solution ◽  
Critical Current ◽  
Benzene Solution ◽  
Ex Situ ◽  
Chemically Treated ◽  
Current Densities ◽  
Powder In Tube ◽  
Mgo Layers

Fe-sheathed MgB2 tapes were fabricated using powder chemically treated through an ex situ process employing a powder-in-tube (PIT) technique. The treatment of MgB2 powder in a benzene solution of benzoic acid caused the pulverization and disappearance of large grains. Compared with the pristine powder without treatment, the tape made from this powder showed a fivefold increase in critical current density (Jc) in 10 T. This was due to the pulverization of grains by the chemical treatment and the removal of surface MgO layers from MgB2 grains by dissolution in the acid solution. The removal of MgO layers was effective in promoting substitution of carbon from the solvent for boron.

Effects of Soil pH and Moisture on the Direct Radioassay of Herbicides in Soil

Weed Science ◽  
1975 ◽  
Vol 23 (1) ◽  
pp. 49-52 ◽  
Author(s):  
T.L. Lavy
Keyword(s):  
Phase Separation ◽  
Liquid Phase ◽  
Oxalic Acid ◽  
Benzoic Acid ◽  
Acid Solution ◽  
Soil Ph ◽  
Oxalic Acid Solution ◽  
Soil Samples ◽  
Liquid Phase Separation ◽  
Acid Herbicides

The addition of 1.5 ml water or 1.5 ml 0.1 N oxalic acid solution to 2 g soil samples containing 14C-labeled herbicides increased the 14C extraction efficiencies. The employment of a modified dioxane extracting-counting solution allowed the addition of 2 ml water without causing a liquid phase separation. Extraction of benzoic acid herbicides from soil was enhanced when 5 mg oxalic acid was added to 2 g soil or when soil was acidified to pH 4.1.

scholarly journals On the metabolism of benzoic acid by cows on purified protein-free and low-protein feed

1978 ◽  
Vol 50 (2) ◽  
pp. 177-181
Author(s):  
M. Kreula ◽  
A. Rauramaa ◽  
M. Tegengren
Keyword(s):  
Benzoic Acid ◽  
Acid Solution ◽  
Pure Form ◽  
The Other ◽  
Milk Samples ◽  
Low Protein ◽  
Whole Milk ◽  
Protein Feed

Two test cows, one adapted to purified, protein-free feed (0-feed, 0-cow) and the other to a low-protein feed (ULP-feed, ULP-cow) in which 60 % of the nitrogen was derived from urea, were fed single doses of 212 and 193 µCi [ring U-14C] benzoic acid respectively in 0.01 % benzoic acid solution. For five days the milk, faeces and urine were collected quantitatively. Fat, protein and lactose contents of the milk samples were determined and these components were isolated in pure form. 23.5 and 98.8 % respectively of the 14C-activity given to the 0- and ULP-cows was found in the urine, and 2.5 % and 3.0 % in the faeces. Totals of 0.5 % and 0.8 % were recovered in the milk, as found from analyses of whole milk. The sum of the activities in isolated fat, protein and lactose components was 0.2 % for both cows, and only the protein being labelled.

Extended Preservation of Iron for Transmission

1967 ◽  
Vol 25 ◽  
pp. 354-355
Author(s):  
E. P. Abrahamson II ◽  
M. W. Dumais
Keyword(s):  
Acid Solution ◽  
Perchloric Acid ◽  
Microscopy Study ◽  
Perchloric Acid Solution ◽  
Transmission Microscopy ◽  
Iron Base ◽  
Cold Stage

In a transmission microscopy study of iron and dilute iron base alloys, it was determined that it is possible to preserve specimens for extended periods of time. Our specimens were prepunched from 5 to 8 mil sheet to microscope size and annealed for several hours at 700°C. They were then thinned in a glacial acetic-12 percent perchloric acid solution using 10 volts and 20 milliamperes, at a temperature of 8 to 14°C.It was noted that by the use of a cold stage, the same specimen can be observed for periods up to one week without excess contamination. When removal of the specimen from the column becomes necessary, it was observed that a specimen may be kept for later observation in 1,2 dichloroethene or methanol for periods in excess of two weeks.

Deposited emulsion particles in the pores of aluminum oxide film

1978 ◽  
Vol 36 (1) ◽  
pp. 450-451
Author(s):  
Michio Ashida ◽  
Yasukiyo Ueda
Keyword(s):  
Oxide Film ◽  
Acid Solution ◽  
Barrier Layer ◽  
Colloidal Particles ◽  
Oxalic Acid Solution ◽  
Anodic Oxide ◽  
Anodic Oxide Film ◽  
Carbon Replica ◽  
Sectioning Method ◽  
Thin Sectioning

An anodic oxide film is formed on aluminum in an acidic elecrolyte during anodizing. The structure of the oxide film was observed directly by carbon replica method(l) and ultra-thin sectioning method(2). The oxide film consists of barrier layer and porous layer constructed with fine hexagonal cellular structure. The diameter of micro pores and the thickness of barrier layer depend on the applying voltage and electrolyte. Because the dimension of the pore corresponds to that of colloidal particles, many metals deposit in the pores. When the oxide film is treated as anode in emulsion of polyelectrolyte, the emulsion particles migrate onto the film and deposit on it. We investigated the behavior of the emulsion particles during electrodeposition.Aluminum foils (99.3%) were anodized in either 0.25M oxalic acid solution at 30°C or 3M sulfuric acid solution at 20°C. After washing with distilled water, the oxide films used as anode were coated with emulsion particles by applying voltage of 200V and then they were cured at 190°C for 30 minutes.

TEM characterization of proton-exchanged LiNbO3 optical waveguides

1986 ◽  
Vol 44 ◽  
pp. 480-481
Author(s):  
W. E. Lee
Keyword(s):  
Refractive Index ◽  
Benzoic Acid ◽  
Optical Waveguides ◽  
Total Internal Reflection ◽  
Index Of Refraction ◽  
Optical Measurements ◽  
Lithium Ions ◽  
Wide Channel ◽  
Tem Characterization

An optical waveguide consists of a several-micron wide channel with a slightly different index of refraction than the host substrate; light can be trapped in the channel by total internal reflection.Optical waveguides can be formed from single-crystal LiNbO3 using the proton exhange technique. In this technique, polished specimens are masked with polycrystal1ine chromium in such a way as to leave 3-13 μm wide channels. These are held in benzoic acid at 249°C for 5 minutes allowing protons to exchange for lithium ions within the channels causing an increase in the refractive index of the channel and creating the waveguide. Unfortunately, optical measurements often reveal a loss in waveguiding ability up to several weeks after exchange.

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