Timing, reproductive

Phil s circuitry skills came in handy when we decided to add an addihonal performance task to the exishng battery. We had nothing that dealt with hming ability, so Phil and I set out to design a time estimahon task. Reviewing the literature, we noted that there were four types of hming skills. The one that seemed easiest to automate was time reproduction. ... 

We found four types of timing skills in the literature time estimation, time production, time comparison and time reproduction. The last appealed to us most, since it seemed to lend itself to automated administration and scoring. For example, subjects could easily produce, and reproduce with appropriate correction, an interval of 5 seconds. The average of 25 responses produced reliable scores, using error zones as shown in Figure 2. 

At the ID50, 302196 produces impairment of Variable Interval Time Reproduction (VITA) scores (Fig. 53). This decrement is very similar to that shown for Number Facility (Fig. 54). Four dose groups are shown in each graph. The decline in scores is very rapid and recovery occurs early. 

Ethyl Alcohol (p.o.) Serial Time Reproduction Scores... 

Fig. 101 Alcohol Effect on time reproduction task (VITA)...

Montane vole Grasses, some Timing reproduction Berger etfli., 1981 ... 

An HPLC offers a combination of speed, reproducibility, and sensitivity. Typical runs take from 10 to 30 min, but long gradients might consume 1 to 2hrs. I have seen 15- to 30-sec stat runs on 3-pm columns in hospital laboratories. Retention times on the same column, run to run, should reproduce by 1%. Two columns of the same type from the same manufacturer should give 5% or better retention time reproduction on the same standard set. 

Figure 3-28 Resonance Raman spectrum of matrix-trapped Cs+ Cl2 (75 mW, 457.9 nm excitation). (A) 0.3 x 10 9 A range, 3-s rise time (B) 0.1 x 10

Equation 1 can be generalized considerably to make it more realistic. The rate parameter r is influenced by generation time, reproductive and disperal capacity, and how the biotic and abiotic environment influences these components. One can refine eq. 1 to account for all of these aspects by dividing Y into reproductive and nonreproductive parts (e.g., latent and infectious lesions), and also by making r a variable that is a function of the environment K can also be made a variable that can vary with host changes and other factors. 

Describe various situations where prediction of life span, maturation time, reproductive maturity, and generation time would be important. 

Exposure to excessive amounts of lead over a long period of time (chronic exposure) increases the risk of developing certain diseases. The parts of the body which may be affected include the blood, nervous system, digestive system, reproductive system, and kidneys. These effects include anemia, muscular weakness, kidney damage, and reproductive effects, such as reduced fertiHty in both men and women, and damage to the fetus of exposed pregnant women. 

It is necessary to estabUsh a criterion for microbial death when considering a sterilization process. With respect to the individual cell, the irreversible cessation of all vital functions such as growth, reproduction, and in the case of vimses, inabiUty to attach and infect, is a most suitable criterion. On a practical level, it is necessary to estabUsh test criteria that permit a conclusion without having to observe individual microbial cells. The failure to reproduce in a suitable medium after incubation at optimum conditions for some acceptable time period is traditionally accepted as satisfactory proof of microbial death and, consequentiy, stetihty. The appHcation of such a testing method is, for practical purposes, however, not considered possible. The cultured article caimot be retrieved for subsequent use and the size of many items totally precludes practical culturing techniques. In order to design acceptable test procedures, the kinetics and thermodynamics of the sterilization process must be understood. 

Organisms evolving under aimual temperature cycles and in environments with varying temperatures spatially have incorporated thermal cues in reproductive behavior, habitat selection, and certain other features which act at the population level. Thus, the balance of births and mortaUties, which determines whether a species survives, is akin to the metaboHc balance at the physiological level in being dependent upon the match, within certain limits, to prescribed temperatures at different times of year. At the ecosystem level, relationships among species, eg, predators, competitors, prey animals, and plant foods, are related to environmental temperatures in complex ways. Many of these interactions are poorly understood. 

Pewter. Modem pewter may have a composition of 90—95 wt % tin, 1—8 wt % antimony, and 0.5—3 wt % copper. Lead should be avoided by contemporary craftsman because it causes the metal surface to blacken with age. Pewter metal can be compressed, bent, spun, and formed into any shape, as weh as being easily cast. A wide variety of consumer articles ate available from domestic and foreign manufacturers. Reproductions of pewter objects from colonial times, some cast from the original molds, ate popular. The annual U.S. production of pewter exceeds 1100 t. 

Value is toxic dose low. TD q, the lowest dose of a substance introduced by any route other than inhalation, over any given period of time to which humans or animals have been exposed and reported to produce any nonsignificant toxic effect in humans or to produce nonsignificant tiimorigenic or reproductive effects in animals or humans. 

The primary difficulty with periodic abstinence is the month-to-month variation in the time of ovulation. Whereas the ovum can only be fertilized during the first 12 to 24 hours after its release from the ovary, sperm remain viable longer in the female reproductive tract, able to fertilize an ovum for 5—7 days and perhaps longer. Thus, intercourse several days prior to ovulation can result in pregnancy. 

To improve the rheological properties and extend the very short working time, a simple polyester is kicluded as thinner. Mixing is easy, and dimensional change ki ak is less than 0.1% over several hours. Elastic recovery and reproduction of detail are exceUent. The elastomeric cycHc imine impression materials have a higher modulus of elasticity than the condensation siHcone or polysulfide mbbers, and are more difficult to remove from the mouth. The materials have relatively low tear strength and an equUibrium water sorption of 14% thus, polyether impression materials tear readily. Because of thek poor dimensional stabUity ki water, they should be stored ki a dry environment. 

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