Barrett and Hendry (2012) also warn, however, that theory-derived critical rates rely on 'many unrealistic assumptions, such as perpetual persistence under constant environmental change' and that 'critical rates for natural populations over time frames of conservation interest could be very different'.
The correlation of tangent vectors along the polymer contour decays exponentially with lp as the decay constant: For persistence lengths that are small in comparison to the polymer contour length L, polymers are considered to be flexible.
It allows to calculate the complete set of chromatin elastic constants (twist and bend persistence lengths, stretch modulus and twist stretch coupling constant), in terms of DNA elastic properties and geometric features of the fiber.
Without the tenacity, persistence and constant pressure of the citizenry, which never let down its guard, this never would have happened".
With our nuclear weapons, reckless damage to the environment, and propensity to plunge into war, we are a constant threat to the persistence of Internet.
In the face of such banal reforms, and amidst the death and the betrayal, and the corruption and delay and disappointment, Treme reminds us of something that the rest of our popular entertainment seeks to skip over -- that the circle of life is our lone constant, in all its persistence and pathology.
We found that CTL responses developed sequentially and required constant antigenic stimulation for persistence.
These data would help to identify the recurrence rate of MDV infection and to identify whether the most probable cause of MDV outbreaks are within barn persistence or constant reintroduction.
