It's obvious in hindsight, but the presence of a well-formed app store is the single most important factor for the viability of a platform for third party developers.
Additionally, the available area for cell adhesion, which is related to fiber and pore size, was a crucial factor for the viability of L929 cells.
Additionally, the essential nature of the HNF4α transcription factor for host viability [10] [12] may limit the hosts' ability to resolve infection and increase the probability of viral persistence.
EPO is an essential factor for the viability and proliferation of erythrocytic progenitors.
We propose that a likely explanation is that exposure time is the major factor for cell viability.
Transport conditions from the slaughterhouse to the laboratory (transportation time approximately 2 h) turned out to be a crucial factor for cell viability.
Correct design of the film forming solution has been shown to be a critical factor for the viability of L. rhamnosus GG during the air drying step, room temperature storage and simulated in-vitro digestion.
Despite the evident importance of both factors for cell viability, animals mutant for either factor die rather late during embryogenesis (Figure 1); this observation can be explained by the presence of maternally provided function supporting development until the end of embryogenesis [39], [40].
Some NMD factors are essential for viability in other organisms (Medghalchi et al, 2001; Metzstein and Krasnow, 2006; Yoine et al, 2006; Wittkopp et al, 2009); but it is not yet known whether NMD or some other important function of these proteins is required for survival (Brumbaugh et al, 2004; Azzalin and Lingner, 2006; Azzalin et al, 2007; Luke et al, 2007; Ajamian et al, 2008).
The quality of reservoir rocks, in particular their permeability, is likely to be a key factor for the economic viability of future gas production from gas hydrates.
Another, contributory factor for the lower viability and yield of hepatocytes from donor liver is the longer cold ischaemic time that donor livers have been exposed to when compared to normal livers (Table 1).
