scholarly journals Analysis of the Growth in Forage Crops : 3. Effect of temperature on organ formation in Ladino clover with special reference to photosynthetic organ formation.

1966 ◽  
Vol 34 (3) ◽  
pp. 264-274 ◽  
Author(s):  
Tomoshiro TAKEDA ◽  
Waichi AGATA
Keyword(s):  
Special Reference ◽  
Effect Of Temperature ◽  
Forage Crops ◽  
Organ Formation

scholarly journals Protease-producing microorganisms inhabiting salted fish (Moloha) with special reference to protease activity of Bacillus subtilis

2014 ◽  
Vol 63 (3-4) ◽  
pp. 303-307 ◽  
Author(s):  
M. H. Abd-Alla ◽  
S. A. Omar ◽  
M. A. El-Nagdy
Keyword(s):  
Bacillus Subtilis ◽  
Salt Tolerance ◽  
Metal Ions ◽  
Special Reference ◽  
Protease Activity ◽  
Enzyme Production ◽  
Effect Of Temperature ◽  
Protease Production ◽  
Salted Fish ◽  
Tanning Industry

The investigation was designed to isolate and identify the proteolytic microorganisms inhabiting salted fish. <i>Bacillus subtilis</i> was chosen as the most promising protease producer. Some properties of the crude protease are presented, the effect of metal ions on protease production has been studied. It was shown that Ca<sup>2+</sup> and Mg<sup>2+</sup> stimulated, while Co<sup>2+</sup> , Zn<sup>2+</sup> and Cu<sup>2+</sup> inhibited the enzyme production. The effect of temperature and pH and salt tolerance have also been studied. Protease activity was stable in 25% NaCl. The favourable characteristics of the enzyme might have extensive application in laundry detergents and in tanning industry.

Properties of toad skin Na-K-ATPase with special reference to effect of temperature

1976 ◽  
Vol 231 (5) ◽  
pp. 1356-1363 ◽  
Author(s):  
YS Park ◽  
SK Hong
Keyword(s):  
Enzyme Activity ◽  
Special Reference ◽  
Incubation Temperature ◽  
Potent Inhibitor ◽  
Effect Of Temperature ◽  
Toad Skin ◽  
Constant Ph ◽  
Atpase System ◽  
Appreciable Variation ◽  
Optimal Ph

The NA-K-ATPase of toad skin was characteristically sensitive to Na, K, and ATP. It was not affected by amiloride, vasopressin, cAMP, and thyroxine, but stimulated by insulin. Ouabain, a potent inhibitor at 37 degrees C, did not inhibit the enzyme activity significantly at 23 degrees C. The optimal pH for the enzyme activity increased as temperature decreased. However, the optimal OH-/H+ ratio of the medium remained constant at 16 regardless of temperature. The Km for ATP remained unchanged between 37 and 8 degrees C if the OH-/H+ ratio was held constant at 16, but increased as temperature decreased if the pH of the medium was held constant at 7.4. The enzyme activity showed no appreciable variation between 37 and 20 degrees C with a constant OH-/H+ ratio of 16, whereas it decreased logarithmically at a constant pH of 7.4 over the same temperature range. These results indicate the presence of a typical Na-K-ATPase system in toad skin and that the enzyme is in the most active catalytic state at a fixed level of OH-/H+ ratio in the medium regardless of incubation temperature.

scholarly journals The glide elements of body-centred cubic crystal, with special reference to the effect of temperature

1940 ◽  
Vol 175 (962) ◽  
pp. 290-315 ◽  
Keyword(s):  
Special Reference ◽  
Single Crystals ◽  
Effect Of Temperature ◽  
Cubic Crystal ◽  
Cubic Crystals ◽  
Different Temperatures ◽  
Sodium And Potassium

In a previous paper from this laboratory (Andrade and Tsien 1937) the particular interest of body-centred cubic crystals was pointed out, and the glide elements for single crystals of sodium and potassium at atmospheric temperatures were determined, viz. glide plane (123) and glide direction [111]. Another paper (Tsien and Chow 1937) describes the determination of the glide elements for molybdenum, for which the glide direction was again [111], but the glide plane was different at different temperatures, viz. (110) at 1000° C and (112) at 300 and 20° C. Planes (123), (110) and (112) have all been given as glide planes for α -iron by different workers (Taylor and Elam 1926; Gough 1928; Fahrenhorst and Schmid 1932), while for tungsten (Goucher 1924) the glide plane has been given as (112) and for β -brass under certain conditions (G. I. Taylor 1928) as (110).

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