In 1889 another Austrian physicist, Ludwig Boltzmann, used the second law of thermodynamics to derive this temperature dependence for an ideal substance that emits and absorbs all frequencies.
HA is not an ideal substance for all procedures, due to its limited residence time when applied to a surgical site.
When he was told by Dr Simon Berrow of Manx of the Irish Whale and Dolphin Watch that shark slime was an ideal substance for DNA sampling, Mr Hall set off for his local DIY store for some ideas.
Comparative assessment of the available data revealed that there is no ideal substance with the potential to act as the one and only reference compound to test for possible anthropogenic infochemical effects on chemical communication in aquatic systems (Table 1).
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This, of course, makes it an ideal substance for use in low-cost splints and packaging supplies.
Faeces may represent an ideal substance for marking, because it has a minimal energetic cost to the signaler [11], and can continue to indicate possession of a territory when the owner is occupied in activities other than territorial defense.
An ideal substance for reconstruction, whether prosthetic or autologous, would be one that stimulates the host's reparative processes so that the final healed tissue is of host origin.
