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1. An act that requires use of resources or time. In Program Evaluation and Review Technique (PERT), an activity is represented by an arrow on a PERT chart.

2. In investing, the amount of a security's relative trading volume; that is, the amount of money flowing into and out of a security in trading. A high amount of activity means that many shares of the security are being bought and sold at a high rate, while a low level of activity indicates the opposite.


The amount of relative trading volume in a security.
References in periodicals archive ?
Phosphates enzyme activity decreased at 15-30 cm depth, which is similar to the previous soil enzymes.
The crude enzyme assays for both bacterial isolates S-RM and 6-RM showed maximum extracellular enzyme activity (350 and 290%) as compared to the intracellular (60 and 34%), respectively.
Our results show that DS inhibits hepatic TDO enzyme activity following chronic treatment, whilst augments brain IDO activity following both acute and chronic administration, that may result in the production of brain kynurenic acid and/or neuro-toxic metabolite, quinolinic acid therefore there is a need that effects of DS on kynurenine pathway should be further investigated to rule out the protective effect of DS in inflammation-induced depression and AD.
In the present study, both training programs (MTV and LTV) and training duration did not influence enzyme activity.
Using reagent-grade enzymes, we evaluated if enzyme activity determined with the api ZYM kit could be quantified.
The effects of different concentrations of ARTEA330EC on changes in the AchE enzyme activity are shown in Figure6.
Effect of different application rates of organic fertilizer on soil enzyme activity and microbial population.
Statistical Analysis: Enzyme activity data (IU/ml) was presented as Mean S.
Effect of different growth parameters on endoglucanase enzyme activity by bacteria isolated from coir retting effluents of estuarine environment, International Journal of Environment Science and Technology, 03: 25-34
Temperature is one of the most important factors determining enzyme activity (Baldrian et al.