Control value

Treatment and dose, ppm Treatment period, d Control values and proportional responses, % Reference... 

Organics related to use of amines for pH control. Value is plant specific. 

In most utibty boilers, steam pressure regulation is achieved by the throttling of turbine control values where steam generated by the boiler is admitted into the steam turbine. Some modem steam generators have been designed to operate at pressures above the critical point where the phase change between Hquid and vapor does not occur. 

Hydraulic control values can utilize a variety of actuators that activate their function. Normally these actuators use manual, electrical, mechanical or pneumatic power sources. 

Simon, D. E. and Fynsk, A. W., Suggested Control Values for Feed Water and Boiler Water Quality in Industrial Boilers. American Society of Mechanical Engineers (1980)... 

Back pressure regulation valves (Figure 9.5) can be used in the suction line, and their function is to prevent the evaporator pressure falling below a predetermined or controlled value, although the compressor suction pressure may be lower. 

Dissolution of Calculi Model. Dissolved Ions from Ca3(PCf)2. Dissolution of calcium phosphate by macrocyclic polyamines proceeds at pH 7, which is established by measuring the freed cation concentration as well as the freed anion concentration with respect to the control values (Table 7). The molar ratio of [Ca2 + ] to [P04 ]... 

The 71 factor calculates a number that is sensitive to the separation between the mean control values for an HTS... 

Fhtients receiving warfarin for the first time often require daily adjustment of die dose, which is based on die daily PT/INR results. The nurse widiholds the drug and notifies die primary healdi care provider if the PT exceeds 1.2 to 1.5 times die control value or die INR ratio exceeds 3. A daily PT is performed until it stabilizes and when any otiier drag is added to or removed from die patient s drag regimen. After the PT has stabilized, it is monitored every 4 to 6 weeks. 

Most laboratories report results for the INR along with the patient s PT and the control value. The INR was devised as a way to standardize PT values and represents a way to correct the routine PT results from different laboratories using various sources of thromboplastin and methods of preparation for the test. The INR is determined by a mathematical equation comparing the patient s PT with the standardized PT value. Some institutions may use only PT, others PT/INR, and some may use INR. The INR is maintained between 2 and 3. 

The nurse must assess the patient for additional evidence of bleeding until the PT is below 1.5 times die control value or until the bleeding episodes cease. The PT generally returns to a safe level within 6 hours of administration of vitamin Kt. Administration of whole blood or plasma may be necessary if severe bleeding occurs because of the delayed onset of vitamin Kx. 

Blood coagulation tests are usually ordered before and during heparin tiierapy, and die dose of heparin is adjusted to die test results. Optimal results of therapy are obtained when the APTT is 1.5 to 2.5 times the control value The LMWHs do not require close monitoring of blood coagulation tests. 

Revisions of the continuous-flow method have been made to allow observations along the length of the flow tube rather than at right angles.5 This method, fast continuous flow, eliminates the dead time during which the reaction cannot be observed. Kinetic data can be extracted to a time resolution of nearly 10 p,s, but the mathematics is more complicated in this limit, because the mixing and chemical reaction occur on the same time scale. Rate constants nearly as large as the diffusion-controlled value have been determined in favorable cases.6... 

Following administration of all dibromobenzenes, within a short period of time (2-4 hrs) a decrease of triglycerides (TG) concentration in the serum of mice was noted constituting approximately 30-60 % of the control values (Fig. 5). Dibromobenzenes caused an increase of MDA concentration in mice liver (Fig. 5). 

When methyl parathion was given orally to rats at doses of 1.5 mg/kg and to guinea pigs at 50 mg/kg, plasma, erythrocyte, and brain cholinesterase activity was maximally inhibited within 30 minutes after administration. In rodents of both species that died after acute intoxication, brain cholinesterase levels decreased to 20% of control values and often to 5-7% (Miyamoto et al. 1963b). The species difference in susceptibility to orally administered methyl parathion is noted in Section 3.2.2.1. 

Fig. 26. The effect of shear on a range of enzymes with a stainless steel disc at a mean velocity gradient of 6490 s at 30 °C, in the presence of an air/liquid interface. Each data point in the figure is the mean value of 4 replicates and is given as a percentage of the control value [107]...

In order to ascertain that the NDELA formation does not occur as a result of trapping of the smoke or during the analysis, we added diethanolamine to tobacco prior to extraction with ethyl acetate in the presence of ascorbic acid. The control value for NDELA was 121 ppb and the experiment with 5.5 iqg diethanolamine addition yielded 113 ppb NDELA. For control of the smoke analysis we added 5.5 mg of DELA in the solvent trap and smoked cigarettes known to be free of DELA. Analysis of the trapped material showed no significant quantities of NDELA, so that artifactual formation of this nitrosamine during smoke collection and analysis can be ruled out. 

There is another explanation for the variations in values of sulfide sulfur. It was cited that oxidation state (/02) od pH of ore fluids are important factor controlling values of ore fluids (e.g., Kajiwara, 1971). According to the sulfur isotopic equilibrium model (Kajiwara, 1971 Ohmoto, 1972), of sulfides in predominance... 

The effect of cellular GSH depletion on /wa/K has also been studied using this model. Guinea-pig ventricular myocytes prepared from DEM-treated animals have been used to determine the effect of glutathione depletion on /xa/K- Myocytes prepared from DEM-treated animals showed a similar profile of glutathione content modification to that previously described in experiments using sarcolemmal homogenates. GSH levels in DEM-treated were reduced from a control value of 0.2 0.04 to 0.02 0.01 nmol/1 X10 cells. Jni/k at 0 mV was reduced from a control value of 1.1 0.12 to... 

Chemiluminescence has been used to demonstrate increased free-radical activity after induction of caerulein pancreatitis, with levels peaking at about 20 min and decreasing rapidly to control values thereafter (Gough et al., 1990). Electron spin resonance has been used to demonstrate increased hydroxyl radical activity in choline-deficient diet pancreatitis in the mouse (Nonaka etal., 1989a). 

A limiter on FC should be used as in 3b. Control values (FCO, KC, TSET)... 

HT are apparently returning toward control values by 8 weeks in striatum... 

NOTE Rats were administered five SC doses of MDA (10 mg/kg). MDMA (10 mg/kg). or METH (15 mg/kg), one dose every 6 hours, and killed 18 hours after the last dose. Results are presented as the means SEM, expressed as a percent of saline control. Control values were TH, 2645 163 nmol tyrosine oxidized/g fissue/hr and TPH, 45.0 3.5 nmol 14C02 fiberated/g tissue/hr... 

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