Delay delayed task/condition

Thus in this system, in addition to the usual requirements, the separator has the task of delaying penetration for as long as possible. A membrane would be regarded as perfect which lets hydroxyl ions pass, but not the larger zincate ions. This requirements is best met by regenerated cellulose ( cellophane ) [10,11], which in swollen condition shows such ion-selective properties but at the same time is also chemically very sensitive and allows only a limited number of cycles the protective effects of additional fleeces of polyamide or polypropylene have already been taken into account. 

In addition to clarification, the extract usually has to be conditioned to match the requirements for the subsequent capture chromatography step, e. g. by reduction of conductivity or adjustment of pH. These manipulations may lead to either immediate or delayed precipitation of extract components, which have to be removed before further processing. Careful design and evaluation of the extraction procedure is therefore an important development task for every individual process. 

Cycle time consists of several individual components. One is the separation time of a sample. Another component is instrument overhead time that may be subdivided into conditioning, sample preparation, and post-separation phases. The final component is system overhead time that covers delays caused outside the LC modules (Figure 3.9). These times do not necessarily have to follow the fixed order shown in the figure. In particular, the position of the instrument conditioning may vary and the tasks do not have to be arranged linearly. Cycle times in early chromatographic systems... 

Schultz, W, Aplcella, R, and Ljungberg, T. (1993) Responses of monkey dopamine neurons to reward and conditioned stimuli during successive steps of learning a delayed response task. / Neurosci 13 900-913. 

In the dorsal and median raphe nuclei, failed to modify performance in the acquisition of temporal discrimination and memory in a delayed conditional discrimination task in rats (Al-Zahrani et al. 1996) and using a delayed interval bisection task (Al-Zahrani et al. 1997). 

Al-Zahrani SS, Ho MY, Al-Ruwaitea AS, et al Effect of destruction of the 5-hydroxytryptaminergic pathways on the acquisition of temporal discrimination and memory for duration in a delayed conditional discrimination task. Psychopharmacology 123 103-110, 1996... 

Schultz, Wolfram, Paul Apicella, and Tomas Ljungberg. 1993. "Responses of Monkey Dopamine Neurons to Reward and Conditioned Stimuli During Successive Steps of Learning a Delayed Response Task." Journal of Neuroscience 13 900-913. 

Critical to the interpretation of any memory-related deficits with the delayed alternation task is the inclusion of a zero-second or no-delay condition. The no-delay condition requires no memory, as there is no delay. Therefore, if a treatment is impairing accuracy under the no-delay condition as well as at the various delay intervals, it is likely that the effects are due to changes in behavioral processes other than remembering. The pattern of change consistent with a selective memory impairment of a toxicant, then, is one composed of no change in accuracy at the zero-second delay but a more pronounced decrease in... 

Performance on the rotarod task declines with thiamine deficiency in a highly reproducible manner. Impaired motor performance on rotarod is apparent by 8 days of TD (-32%) and is severe by 10 days of TD (-97%) (Karuppagounder et al., 2007 Shi et al., 2007). The decline in performance on this task approximates changes in neuronal death. Thus, compounds or conditions that improve rotarod performance may delay neuron death. 

Wallace realized immediately after arrival on the Isthmus that the harsh terrain and the climate conditions were a serious obstacle to his project. The task ahead of him seemed almost impossible, to dig a canal 80 km long and 10 m below sea level stretching from the Atlantic to the Pacific Ocean. He would have to cut through dense jungle, control parts of the Chagres River, and haul away sections of the Culebra Mountain. Wallace asked for additional time to survey the area, but Roosevelt s directive to Make the dirt fly prevented any further delay. 

---