Virulence factors have been defined as components whose absence attenuates bacterial virulence but not viability [44].
+ presence of components; − absence of components.
In the simulation for an event to occur, at least one sufficient cause has to occur, which comprises the occurrence of two matched causal components and absence of any competing event.
This relatively simple technique, which uses the arterovenous pressure gradient to force blood through a very low-resistance heparinated circuit, has several advantages: lower anticoagulation requirements, small priming volume, little mechanical damage to blood components, and absence of recirculation.
Rowe & Kahn [ 11] distinguished between "normal" and "successful" aging - the latter a combination of three components: a) absence or avoidance of disease and risk factors for disease, b) appropriate physical and cognitive functioning, and c) active engagement with life (including autonomy and social support).
The samples were considered positive (presence of malignant cells), negative (nonexistence of malignant cells, adequate cellular component and absence of bronchial epithelial cells contamination) and inadequate (no cellular component, blood, merely bronchial epithelial cells or insufficient material to achieve a definitive diagnosis).
The subgroup analyses suggest that laterocollis as a predominant component, the absence of baseline tremor and absence of concomitant medication are factors that may be associated with higher response rates.
As starch is such an important storage component, its absence in starch mutants is expected to impair growth to a certain extent, as was observed in C. reinhardtii[ 11].
Three, estimated times since divergence of ancestral components assumed the absence of gene flow.
Up-to-the-minute knowledge of status is essential to effective response when difficulties such as the breakdown of a machine, the shortage of required materials or components, or the absence of important employees occur.
