Sentence examples for became difficult to detect from inspiring English sources

The lack of a post-noon PI would be because the MI signal reached the ionosphere earlier than the PI current system developed under gradual compression or because the post-noon PI shifted nightside and became difficult to detect owing to low conductance.

When foam samples were allowed to sit for several days at ambient temperature, these peptides became difficult to detect.

At 40 min af, first cleavage anaphase was observed, and the nucleus became difficult to detect at 50 min af.

Efficient building design, and management of this through to the building's operation is critical as sub-optimal performance becomes difficult to detect and assess once in the operational stage.

Fraundorf et al. (1982) reported that SF tracks in olivine become difficult to detect after pulse heating in the range of 500 600 °C, whereas those in pyroxene can survive pulse heating at 625 °C but disappear after 700 °C.

Fibre reinforced composite structures usually demonstrate intra- (such as fibre fracture, matrix cracking and splitting, fibre/matrix debonding) and inter-laminar (delamination) damage modes that are formed, developed and interacted in a complicated pattern internally, which becomes difficult to detect non-destructively (Diaz Valdes and Soutis 2000, 2002).

Intensities below 5 mA and above 26 mA are problematic as it becomes difficult to detect differences between BEB patients and controls [29].

These data indicate that as one moves from early to higher visual areas in the human, just as in the monkey, contralateral preference remains clearly identifiable while topographic signals become difficult to detect.

The current results indicate that as one moves from early visual areas to extra-occipital areas, topographic signals become difficult to detect while contralateral preferences remain robust and extend throughout the entire contralateral field.

As a tumor grows, the lymphatics inside the tumor are compressed or destroyed and become difficult to detect by immunohistochemistry.

One explanation could be that the effect of variations in individual sexual habits becomes difficult to detect in HIV-positive population where the background prevalence of sexually transmitted disease exceeds a certain threshold (Thomas et al, 2004).