The dark, light-absorbing sublayers of melanin that intensify reflected structural (Tyndall) blues or iridescent displays in feathers were mentioned above.
That Mr. Bush is already attacking Mr. Kerry by name and that his re-election committee is orchestrating an intensifying attack reflects a changing climate where polls show Mr. Bush trailing or even with Mr. Kerry and in which some Republicans have expressed concern about Mr. Bush's usually sure-footed political operation.
In the meantime the economic crisis intensifies, as reflected in rising unemployment, poverty, inflation, and government debt, power outages, capital flight and an absence of tourists.
But these deals -- particularly the one between Aventis and Regeneron -- seem pricey for drugs in such early stages of testing, according to analysts, who say they may reflect intensifying competition.
The scrutiny over Facebook's treatment of editorial content has been intensifying for months, reflecting the site's unrivaled power and influence in distributing news alongside everything else its users share on the site.
But their divergent points of view reflect intensifying debates on that issue and a larger issue for the N.F.L.: continuing to attract the raw material for a multibillion-dollar industry as health and safety concerns become increasingly pronounced.
Across the country, cities are showing a renewed interest in taking over the electricity business from private utilities, reflecting intensifying concerns about climate change, responses to power disruptions and a desire to pump more renewable energy into the grid.
But his comments also reflected an intensifying power struggle between the Muslim Brotherhood and the military as the presidential vote approaches.
But analysts said the subversive hand gesture accurately reflected the intensifying frustration of many Czechs and a growing feeling that the 1989 revolution had failed to deliver on its promises.
And that split over the lessons of the 2012 presidential election reflected an intensifying debate within the Republican Party: whether to change with the times to expand their appeal or reject pressure for moderation in the belief that only an ideologically pure message will rally voters.
