This paper seeks to identify the factors which have the greatest effect on gas diffusion rates into animal burrows, and in turn on the maximum size of burrowing animals which may rely on simple burrow ...

For many years the general body surface has been recognized as the primitive site of respiratory gas exchange in the animal kingdom. Even in simple animals such as the sea anemones, however, some ...

Somatic embryogenesis can be induced in the leaves of cork oak (Quercus suber L.) trees. The use of this propagation system in multivarietal forestry requires the mass production of cloned plants at ...

The present study was approved by the Animal Care Committee of the government agencies of Baden-Württemberg. Meconium was obtained from healthy human infants less than 24 h old, pooled, homogenized, ...