Resetting phenomenon

At the moment I am more interested in the principle of this resetting phenomenon than the details of its mechanisms. It illustrates beautifully the great importance of looking at diseases such as arterial hypertension and atherosclerosis as diseases of regulation/ The term arterial hypertension" is not a good one to describe the cardiovascular disease in which not only is the pressure abnormally elevated but there is accompanying vascular disease. It is obvious that it is the vascular disease which kills the patient. 

Almendral JM, Rosenthal ME, Stamato NJ, Marchlinski FE, Buxton AE, Frame LH, Miller JM, Josephson ME. Analysis of the resetting phenomenon in sustained uniform ventricular tachycardia incidence and relation to termination. J Am Coll Cardiol 1986 8 294-300. 

We should not assume that odor coding at the level of the sensory neurons is a static phenomenon. Research on Drosophila gives us three cases where influences from the external or internal environment change response properties of ORNs. First, sensory adaptation can temporarily reset sensitivity of ORNs to persisting odorants. Next, circadian rhythms can cause daily cycles of ORN sensitivity. Finally, sensory neurons may change their synaptic properties as a result of chronic odor exposure. 

Figure 2). In other words, it takes a higher serum calcium concenhation to inhibit parathyroid hormone secretion, a phenomenon known as a reset of the "set-point" [33, 34]. 

Continuous exposure of a protein-coupled receptor to its ligand leads to a phenomenon known as desensltlza-tlon. Describe several molecular mechanisms for receptor de-sensltlzatlon. How can a receptor be reset to Its original sensitized state What effect would a mutant receptor lacking serine or threonine phosphorylation sites have on a cell ... 

As a certain concentration of CHBr (C02H)2 is needed for reaction 9 to occur long induction period for oscillations is expected, a phenomenon, which is also observed experimentally. During this induction period, the concentration of Br" is small and mechanism II dominates due to the slow conversion of Ce4+ into Ce3+ and the accumulation of brommalonic acid (reaction 8). Step 9 (8.71) results in the change of the blue color of solution to red resetting the chemical clock for the next oscillation. In fact, the oxidized form of the catalyst can also react directly with malonic acid, so there may be less than one bromide ion per cerium (III) ion produced. 

An inherent disadvantage of integral control action is a phenomenon known as reset windup. Recall that the integral mode causes the controller output to change as long as e(t ) 0 in Eq. 8-8. When a sustained error... 

Some polymer solutions show the phenomenon of gelation. The polymeric chains form association complexes at widely separated points at a certain reduced solvent power of the medium. This leads to the formation of a continuous physical network structure extending throughout the volume of the system. The assoeiation producing quasi-crosslinkages is a reversible pioeess, so that the gel may be liquified and reset many times. The nature of the linkages is rather imperfectly understood, but the phenomenon is usually encountered with more or less crystalline polymers. Sometimes, sharp X-ray diffraction patterns are observed which disappear at the melting point of the gel. 

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