scholarly journals An Improved Plate Method, in the Presence of Calcium Chloride or Sulfuric Acid, for Simultaneous Detection of Alginate Lyases.

1991 ◽  
Vol 55 (10) ◽  
pp. 2637-2638 ◽  
Author(s):  
Satoshi TAKESHITA ◽  
Tatsuya ODA ◽  
Tsuyoshi MURAMATSU
Keyword(s):  
Sulfuric Acid ◽  
Calcium Chloride ◽  
Simultaneous Detection ◽  
Plate Method ◽  
Alginate Lyases

Preparation of alginate fibers coagulated by calcium chloride or sulfuric acid: Application to the adsorption of Sr2+

2018 ◽  
Vol 355 ◽  
pp. 154-161 ◽  
Author(s):  
Duangkamol Dechojarassri ◽  
Sahori Omote ◽  
Kensuke Nishida ◽  
Takehisa Omura ◽  
Hisashi Yamaguchi ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Calcium Chloride ◽  
Alginate Fibers

Corrosion Resistance of Titanium and Zirconium In Chemical Plant Exposures★

CORROSION ◽  
1959 ◽  
Vol 15 (7) ◽  
pp. 19-28 ◽  
Author(s):  
P. J. GEGNER ◽  
W. L. WILSO
Keyword(s):  
Sulfuric Acid ◽  
Nitric Acid ◽  
Calcium Chloride ◽  
Hypochlorous Acid ◽  
Sea Water ◽  
Chemical Plant ◽  
Number Of Solutions ◽  
Corrosion Rates ◽  
Chlorine Gas ◽  
Sodium And Potassium

Abstract Corrosion tests were conducted with titanium, zirconium and a number of other metals in a wide variety of chemical plant exposures. Some of the tests were carried out under similar conditions in as many as five different plants. Titanium was found to possess low or, in many cases, nil corrosion rates in such varied exposures as wet chlorine gas, hypochlorous acid, sodium and calcium hypochlorites, sodium and potassium chlorides, sea water and a number of solutions containing wet chlorine. It was also found to be very resistant to many concentrations of calcium chloride, sodium and potassium hydroxides, nitric acid and chlorine-saturated sulfuric acid. Zirconium exhibited low corrosion rates in nitric acid, sodium and potassium hydroxides, hydrochloric acid, dry chlorine, sodium hypochlorite, sodium and potassium chlorides, sea water and some concentrations of calcium chloride and chlorine-saturated sulfuric acid. Results of 116 exposures involving over 800 corrosion rates on 40 different materials are described. 6.3.15

Preparation of Thin Cadmium Telluride Samples for Electron Microscope Studies

1974 ◽  
Vol 32 ◽  
pp. 548-549
Author(s):  
T. J. Magee ◽  
J. Peng ◽  
J. Bean
Keyword(s):  
Electron Microscope ◽  
Sulfuric Acid ◽  
Solid State ◽  
Sample Preparation ◽  
Cadmium Telluride ◽  
Potassium Dichromate ◽  
Optical Components ◽  
The Past ◽  
Solid State Devices

Cadmium telluride has become increasingly important in a number of technological applications, particularly in the area of laser-optical components and solid state devices, Microstructural characterizations of the material have in the past been somewhat limited because of the lack of suitable sample preparation and thinning techniques. Utilizing a modified jet thinning apparatus and a potassium dichromate-sulfuric acid thinning solution, a procedure has now been developed for obtaining thin contamination-free samples for TEM examination.

Physical, Chemical, and Crystallographic Characterization of Anodic Coatings on High Strength Aluminum Base Alloys

1976 ◽  
Vol 34 ◽  
pp. 636-637
Author(s):  
R. E. Herfert ◽  
N. T. McDevitt
Keyword(s):  
Sulfuric Acid ◽  
Salt Spray ◽  
High Strength ◽  
Environmental Stability ◽  
Anodic Films ◽  
Sodium Dichromate ◽  
Corrosion Resistant ◽  
Aerospace Applications ◽  
Bond Strengths ◽  
Adhesive Bonded Joints

Durability of adhesive bonded joints in moisture and salt spray environments is essential to USAF aircraft. Structural bonding technology for aerospace applications has depended for many years on the preparation of aluminum surfaces by a sulfuric acid/sodium dichromate (FPL etch) treatment. Recently, specific thin film anodizing techniques, phosphoric acid, and chromic acid anodizing have been developed which not only provide good initial bond strengths but vastly improved environmental durability. These thin anodic films are in contrast to the commonly used thick anodic films such as the sulfuric acid or "hard" sulfuric acid anodic films which are highly corrosion resistant in themselves, but which do not provide good initial bond strengths, particularly in low temperature peel.The objective of this study was to determine the characteristics of anodic films on aluminum alloys that make them corrosion resistant. The chemical composition, physical morphology and structure, and mechanical properties of the thin oxide films were to be defined and correlated with the environmental stability of these surfaces in humidity and salt spray. It is anticipated that anodic film characteristics and corrosion resistance will vary with the anodizing processing conditions.

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