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Product of Young’s modulus E and function f(ν, ρ) measured by particles in collagen networks having short (red), medium (blue), or long (black) fibers at the lowest level of contraction (30°C), corresponding to contractile radial strain of ≈ 0.1 Each cross represents a different PNIPAAm particle. Horizontal lines show means; vertical lines show 95% confidence intervals of the means.
