Rate duration durations

The ha2ard assessment is to iaclude identification of a worst-case scenario and other more likely scenarios for release of a regulated substance, and analy2e the off-site consequences of such releases. The release and consequence assessment is to iaclude the rate, duration, and quantity of the release, the distances for exposure or damage (usiag atmospheric, called "F" stabiUty and a 1.5-m/s wiad, and most-often-occurriag conditions), populations that could be exposed, and environmental damage that could be expected. 

Several other antigens with good immunocontraceptive potential have been identified and investigated in laboratory animals. In most studies, the rate and duration of the immunocontraceptive effect are less than acceptable. A potential problem in immunological approaches to antifertUity research is the need for a safe, effective adjuvant and suitable animal models for evaluating the efficacy and safety of methods (111). Newer and more effective adjuvants are required for contraceptive vaccines and vaccines in general. 

Alginate impression materials are chemically reactive mixtures. AH factors that influence reaction rates are, therefore, important in the use of these materials, ie, correct proportioning temperature of the water, powder, and mixing equipment and spatulation rate and duration. 

For motors with a short-time rating, the duration of the test should correspond to the specified short-time rating. At the end of the test the specified temperature rise limits should not exceed. At the beginning of the test, the temperature of the motor should be within 5°C of that of the cooling air. 

ALOHA has a comprehensive chemical source term library (>700 pure chemicals). The code can address many types of pipe and tank releases, including two-phased flows from pressurized/ cryogenic chemicals. The user may enter a constant or variable vapor source rate and duration of... 

FIRE SIMULATOR predicts the effects of fire growth in a 1-room, 2-vent compartment with sprinkler and detector. It predicts temperature and smoke properties (Oj/CO/COj concentrations and optical densities), heat transfer through room walls and ceilings, sprinkler/heat and smoke detector activation time, heating history of sprinkler/heat detector links, smoke detector response, sprinkler activation, ceiling jet temperature and velocity history (at specified radius from the flre i, sprinkler suppression rate of fire, time to flashover, post-flashover burning rates and duration, doors and windows which open and close, forced ventilation, post-flashover ventilation-limited combustion, lower flammability limit, smoke emissivity, and generation rates of CO/CO, pro iri i post-flashover. 

High voltage (kV) Rated short-duration power frequency withstand voltage (kV) Rated lighting impulse withstand voltage ... 

The in vitro release profiles of many microsphere formulations including steroids can be determined by an ethanol/water model (74). By adjusting the ethanol/water ratio in the receiving fluid, the rate and duration of release can be optimized to afford a rapid evaluation tool for developmental and quality control purposes. The model is not intended to have one-to-one correlation with in vivo results. 

The rate and duration of steroid release is affected by (1) polymer composition, (2) drug/polymer ratio (3) microsphere size distribution, and (4) microsphere quality (75). The ratio of glycolide to lactide in the copolymer has been found to be more dominant than the polymer molecular weight in the design of controlled release formulations. Microspheres of smaller size provide in vivo drug profiles of higher levels and shorter durations because of greater surface area. 

The limits of transition region BC are not very distinct and depend on the experimental conditions. At high potential scan rates (short duration of the experiment), passivation will start later (i.e., potential will be somewhat more positive, and for a short time the currents may be higher than i ). 

Unit Exposure Medium Intake Rate) (Frequency) (Duration)... 

Figure 14 shows the relationship between valve position and controlled variable (temperature) characteristics of proportional mode. Notice that valve position changes in exact proportion to deviation. Also, the proportional mode responds only to amount of deviation and is insensitive to rate or duration of deviation. At the 2 minute and 4 minute marks, when the temperature returns to its setpoint value, the valve returns to its initial position. There is no valve correction without deviation. 

Management of stages III and IV indolent lymphoma is controversial because standard approaches are not curative. Time to relapse is only 18 to 36 months. After relapse, response can be reinduced however, response rates and durations decrease with each retreatment. 

Decomposition/stabilization rate, duration of composting (immature or mature compost)... 

Mathematical estimates are available that can calculate the flame and heat effects (i.e., size, rate and duration) for pool, jet and flash hydrocarbon fires. These estimates are based on the "assumed" parameter of the material release rate. To some extent, the ambient wind speed also has a varying influence. 

Regeneration gas requirements are readily obtained once the adsorber is sized and the pressure vessel has been designed. The requirements for gas, a flow rate and duration for heating arise from a heat balance. 

Modeling of gas transport is also useful for correlating dose-response data obtained under different conditions. Brain suggested that the total dose of an inhaled gas is relate to ventilation rate, duration of exposure, and gas concentration before inhalation. Folinsbee et al. exposed human subjects to ozone at 0.37, 0.5, or 0.75 ppm for 2 h while they were at rest or exerdsing intermittently. The primary response of the subjects was an alteration in the exercise ventilatory pattern. They... 

An exposure assessment is the quantitative or qualitative evaluation of the amount of a substance that humans come into contact with and includes consideration of the intensity, frequency and duration of contact, the route of exposure (e.g., dermal, oral, or respiratory), rates (chemical intake or uptake rates), the resulting amount that actually crosses the boundary (a dose), and the amount absorbed (internal dose). Depending on the purpose of an exposure assessment, the numerical output may be an estimate of the intensity, rate, duration, and frequency of contact exposure or dose (the resulting amount that actually crosses the boundary). For risk assessments of chemical substances based on dose-response relationships, the output usually includes an estimate of dose (WHO/IPCS 1999). 

Probabilistic exposure models attempt to provide inputs to exposure models by representing variability or uncertainty via frequency or probability distributions. Probabilistic methods can be used in the exposure assessment because pertinent variables (e.g., concentration, intake rate, exposure duration, and body weight) have been identified, their distributions can be observed, and the formula for combining the variables to estimate the exposure is well defined. 

After the product has dried, it is heated or fired in a furnace or kiln. Modern ceramics generally require certain heating schedules that include the rate and duration of heating and conditions such as the presence or absence of air. This is similar to procedures used to produce carbon fibers where the heating schedule is critical to the end product s properties. 

An assessment of the rates and duration of phenolic acid production from a residue is an important first step. Laboratory and field studies for assessing the dynamics of phenolic acid production must include considerations of the nature of the residue, soil properties, nutrient status of the system, microbial biomass interrelationships, temperature, moisture, residue placement in or on the soil, and other factors that relate to the field. Soil properties in the field are especially important when organic residues are incorporated. When soils are wet, such as those with more than -0.02 MPa water potential, oxygen diffusion is impeded and anaerobic conditions prevail, especially in soils that are high in clay content. Under these circumstances, microbial byproducts change dramatically and one result, for example, is an increase in the production of phenolic acids. Phenolic acid production is also affected by temperature (22) and soil fertility status (23). While the C H ratio of an organic residue may influence the rate of its decomposition and, hence, the rate of phenolic acid production, the... 

Efficacy in maintenance treatment. Studies in adult schizophrenia concerning maintenance treatment have been especially interesting, because the majority of the patients were nonresponders to conventional antipsychotics. These studies demonstrate the superior efficacy of clozapine as maintenance treatment in therapy-refractory psychoses treated by classical antipsychotics. Beyond that, it could be demonstrated that clozapine was effective in reducing recurrence rates and duration of hospitalization. The superior efficacy of clozapine, although not its effects on recurrence or hospital stay, have also been demonstrated in adolescents suffering from chronic schizophrenia (Schulz et ah, 1996, 1997). 

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