scholarly journals Acute exposure to the water-soluble fraction of gasoline (WSFG) affects oxygen consumption, nitrogenous-waste and Mg excretion, and activates anaerobic metabolism in the goldfish Carassius auratus

2019 ◽  
Vol 226 ◽  
pp. 108590
Author(s):  
Dal Pont G. ◽  
Luciana Rodrigues Souza-Bastos ◽  
Marina Giacomin ◽  
Rafael Garrett Dolatto ◽  
Loana Mara Baika ◽  
...  
Keyword(s):  
Oxygen Consumption ◽  
Carassius Auratus ◽  
Anaerobic Metabolism ◽  
Soluble Fraction ◽  
Water Soluble ◽  
Acute Exposure ◽  
Water Soluble Fraction ◽  
Nitrogenous Waste ◽  
Goldfish Carassius Auratus

SOME EXPERIMENTS ON THE OXYGEN CONSUMPTION OF GOLDFISH (CARASSIUS AURATUS L.) IN RELATION TO SWIMMING SPEED

1965 ◽  
Vol 43 (4) ◽  
pp. 623-633 ◽  
Author(s):  
H. Smit
Keyword(s):  
Oxygen Consumption ◽  
Oxygen Uptake ◽  
Swimming Speed ◽  
Carassius Auratus ◽  
Anaerobic Metabolism ◽  
Carbon Dioxide Production ◽  
Water Current ◽  
Goldfish Carassius Auratus ◽  
Standard Value ◽  
At Will

This investigation was designed to measure the relation between the oxygen consumption of fish and their swimming speed. Experiments were performed with the aid of an annular fish chamber, which can be rotated at will, and by means of Blazka's apparatus, in which the fish swims against a water current produced by a rotating propeller.Oxygen consumption increases with swimming speed. Beyond a speed of about 0.5 body lengths per second, however, the goldfish passes to another type of swimming and by doing so, it is able to reach approximately four times this speed at the same rate of oxygen uptake.Extrapolation of the line relating speed and oxygen consumption to zero activity gives the value of standard metabolism. The actual oxygen uptake minus this standard value is taken as a measure of the energy expenditure of the propulsion muscles.Excitement appears to raise the fish's oxygen consumption sharply, even without any increase of its locomotor activity.Both excitement and anaerobic metabolism can vitiate the reliability of power calculations based on the rate of oxygen uptake. Only rates found when the fish is not excited may be used to calculate the energy spent by the fish in swimming. Simultaneous measurements of carbon dioxide production and oxygen uptake are probably required to obtain an estimate of the rate of anaerobic metabolism.

Impact of Rice Flour Cold-Water-Soluble Fraction Removal on Gelatinization and Pasting Properties

2014 ◽  
Vol 91 (5) ◽  
pp. 473-481 ◽  
Author(s):  
Guiai Jiao ◽  
Xiangjin Wei ◽  
Gaoneng Shao ◽  
Lihong Xie ◽  
Zhonghua Sheng ◽  
...  
Keyword(s):  
Cold Water ◽  
Soluble Fraction ◽  
Rice Flour ◽  
Pasting Properties ◽  
Water Soluble ◽  
Water Soluble Fraction

FRACTIONATION OF LIVETIN AND THE MOLECULAR WEIGHTS OF THE α- AND β-COMPONENTS

1957 ◽  
Vol 35 (4) ◽  
pp. 241-250 ◽  
Author(s):  
W. G. Martin ◽  
J. E. Vandegaer ◽  
W. H. Cook
Keyword(s):  
Light Scattering ◽  
Soluble Protein ◽  
Soluble Fraction ◽  
Egg Yolk ◽  
Water Soluble ◽  
Water Soluble Fraction ◽  
Molecular Weights ◽  
Water Soluble Protein ◽  
Hen Egg Yolk ◽  
Hen Egg

Livetin, the major water-soluble protein of hen egg yolk, was found to contain three major components having mobilities of −6.3, −3.8, and −2.1 cm.2 sec.−1 volt−1 at pH 8, µ 0.1, and these have been designated α-, β-, and γ-livetin respectively. The α- and β-livetins were separated and purified electrophoretically after removal of γ-livetin by precipitation from 37% saturated ammonium sulphate or 20% isopropanol. The α-, β-, and mixed livetins resembled pseudoglobulins in solubility but γ-livetin was unstable and this loss of solubility has, so far, prevented its characterization. Molecular weights determined by light scattering, osmotic pressure, and Archibald sedimentation procedure yielded respectively: 8.7, 7.8, and 6.7 × 104 for α-livetin, and 4.8, 5.0, and4.5 × 104 for β-livetin. Under suitable conditions of sedimentation and electrophoresis, egg yolk has been shown to contain three components having the same behavior as the three livetins of the water-soluble fraction.

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