Oxygen declines

By contrast, thermal pollution can have some significant effects on the natural ecosystem. As the temperature of water rises, its ability to hold dissolved oxygen declines. The graph shows how the solubility of oxygen varies with temperature. Since fish are cold-blooded animals, they are unable to regulate their own temperatures, and... 

D. J. Mehagnoul-Schipper, L. C. Vloet, W. N. Colier, W. H. Hoefnagels, and R. W. Jansen, Cerebral Oxygenation Declines in Healthy Elderly Subjects in Response to Assuming the Upright Position, Stroke, 31(7), 1615-1620 (2000). 

Y. Bhambhani, R. Malik, and S. Mookerjee, Cerebral Oxygenation Declines at Exercise Intensities above the Respiratory Compensation Threshold, Respir. Physiol. Neurobiol., 156,196 (2007). 

The temperatures decline from a high of 115°C ia the first reactor to 90°C ia the last. The oxygen ratio as a function of consumable oxygen is also... 

Insects poisoned with rotenone exhibit a steady decline ia oxygen consumption and the iasecticide has been shown to have a specific action ia interfering with the electron transport iavolved ia the oxidation of reduced nicotinamide adenine dinucleotide (NADH) to nicotinamide adenine dinucleotide (NAD) by cytochrome b. Poisoning, therefore, inhibits the mitochondrial oxidation of Krebs-cycle iatermediates which is catalysed by NAD. 

In Germany and Japan, pulverized quicklime is used in making self-fluxing sinters, partially replacing limestone. Granular dead-burned dolomite is stiU used to protect the refractory lining of open-hearth and electric furnaces, but not the basic oxygen furnace. Refractory time has declined with the... 

The quality of steels and alloys depend on content at them alloying elements, oxygen, phosphorus, and sulfur. The presence of harmful admixtures worsens properties of materials that show up in formation of cracks, decline of plasticity and malleability. In this connection great value has operations, which allow in this as result to decrease content of solute oxygen, phosphoms, sulfur - desoxidation, desulfuration, dephosphorization. 

After the 20K step increase in feed temperature, not much change could be observed for two minutes. Then the last thermocouple started to increase from 560 to 1200 K level, and the hot zone widened. The forward migration rate of the hot zone was about 5 cm/min. After about six minutes, the oxygen content of the cycle gas became very low and temperature slowly started to decline. With this the experiment terminated. 

Decline (linear with increasing CoHb level) in maximal oxygen uptake of healthy young men undergoing strenuous exercise decrements in visual perception, manual dexterity, and performance of complex sensorimotor tasks... 

Figure 8.4 shows the steady-state effect of po2 and imposed catalyst potential Uwr on the rate of C2H4 oxidation and compares the results with the open-circuit kinetics. The sharp rate decline for high po2 values is due to the formation of surface Rh oxide.13 Increasing UWr causes a significant increase in the oxygen partial pressure, po2, where oxide forms and thus causes a dramatic increase in r for intermediate (1 to 2.5 kPa) Po2 values. For low P02 values (reduced surface) the effect of Uwr is moderate with p values up to 2. For highp02 values (po2>Po2 > oxidized surface) Uwr has practically no effect on the rate. 

Passivation of the metal and the associated sharp decline of its anodic dissolntion rate have a strong effect on corrosion rates (curve 5 and the point of intersection C in Fig. 22.2b). Passivation is encountered more often under the effect of oxidizing agents (e.g., in the presence of oxygen). 

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