Low-temperature cyaniding of structural steels in liquid media

1968 ◽  
Vol 10 (4) ◽  
pp. 257-260 ◽  
Author(s):  
V. V. Bogdanov ◽  
Yu. M. Lakhtin ◽  
G. N. Neustroev ◽  
A. I. Ryazanova
Keyword(s):  
Low Temperature ◽  
Structural Steels ◽  
Liquid Media

Bioproduction of ochratoxin A and penicillic acid by members of the Aspergillus ochraceus group

1972 ◽  
Vol 18 (5) ◽  
pp. 631-636 ◽  
Author(s):  
Alex Ciegler
Keyword(s):  
Quantitative Analysis ◽  
Low Temperature ◽  
Ochratoxin A ◽  
Acid Synthesis ◽  
Aspergillus Ochraceus ◽  
Cereal Grains ◽  
Liquid Media ◽  
Penicillic Acid ◽  
Group A ◽  
Fluorescent Derivatives

Various strains of species belonging to the Aspergillus ochraceus group (A. ochraceus, A. sclerotiorum, A. alliaceus, A. ostianus, A. melleus, and A. sulphureus) can produce two mycotoxins, ochratoxin A and penicillic acid, on liquid media and in cereal grains. The quantity of each toxin produced is influenced by temperature; low temperature (10 and 20C) favor penicillic acid synthesis and higher (28C), ochratoxin A production. Generally penicillic acid is produced in yields about one to three magnitudes greater than ochratoxin A. A simple fluorodensitometric method for concomitant quantitative analysis of the two toxins has been developed based on conversion of penicillic acid and ochratoxin A to fluorescent derivatives by treatment with ammonia fumes.

INFLUENCE OF TIME-TEMPERATURE PARAMETERS OF LONG-DURATION EXPOSURE ON TRANSFORMATIONS IN STRUCTURAL STEELS (review)

2021 ◽  
pp. 15-23
Author(s):  
E.A. Eliseev ◽  
◽  
G.S. Sevalnev ◽  
A.V. Doroshenko ◽  
M.E. Druzhinina ◽  
...  
Keyword(s):  
Low Temperature ◽  
Chemical Elements ◽  
Structural Steels ◽  
Holding Time ◽  
Temper Brittleness ◽  
Brittleness Temperature ◽  
Temperature Range ◽  
Long Duration ◽  
Reversible Temper ◽  
Reversible Temper Brittleness

Low-temperature nitriding of steels is usually carried out in the temperature range of development of reversible temper brittleness. The holding time at these temperatures significantly exceeds the holding time during normal tempering, which can negatively affect the properties of steel. The article considers theories that explain the processes occurring in steels in the temper brittleness temperature range. It may be concluded that views linking the embrittlement of steel with alloying elements such as nickel in its content are not confirmed by the experiments; at the same time ideas based on classical views about the diffusion of chemical elements explain the processes in steel better.

Wear resistance of structural steels after low-temperature cyaniding and carbonitriding

1975 ◽  
Vol 17 (11) ◽  
pp. 986-988
Author(s):  
Yu. M. Lakhtin ◽  
G. N. Neustroev ◽  
N. A. Airapetyan
Keyword(s):  
Wear Resistance ◽  
Low Temperature ◽  
Structural Steels

Effects of the composition and low-temperature thermomechanical treatment on the mechanical properties of structural steels

1963 ◽  
Vol 5 (4) ◽  
pp. 215-220 ◽  
Author(s):  
E. D. Gidon ◽  
Z. I. Alisanova ◽  
V. A. Malyshevskii ◽  
N. A. Shuvalova
Keyword(s):  
Mechanical Properties ◽  
Low Temperature ◽  
Thermomechanical Treatment ◽  
Structural Steels

A comparison of solid and liquid media for resuscitation of starvation- and low-temperature-induced nonculturable cells of Aeromonas hydrophila

2000 ◽  
Vol 173 (4) ◽  
pp. 307-310 ◽  
Author(s):  
Sun N. Wai ◽  
Yoshimitsu Mizunoe ◽  
Akemi Takade ◽  
Shin-ichi Yoshida
Keyword(s):  
Low Temperature ◽  
Aeromonas Hydrophila ◽  
Liquid Media ◽  
Nonculturable Cells

Low-temperature fatigue strength of structural steels

1976 ◽  
Vol 8 (1) ◽  
pp. 5-7 ◽  
Author(s):  
I. V. Kudryavtsev ◽  
A. D. Chudnovskii ◽  
I. M. Rafalovich
Keyword(s):  
Fatigue Strength ◽  
Low Temperature ◽  
Structural Steels
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