Shear wave filtering in naturally-occurring Bouligand structures

Shear wave filtering in naturally-occurring Bouligand structures.

Wave propagation was investigated in the Bouligand-like structure from within the dactyl club of the stomatopod, a crustacean that is known to smash their heavily shelled preys with high accelerations. We incorporate the layered nature in a unitary material cell through the propagator matrix formalism while the periodic nature of the material is considered via Bloch boundary conditions as appli...

Naturally occurring ehrlichiosis in Egyptian dogs

Canine ehrlichiosis has emerged as one of the most clinically important tick-borne diseases affecting dogs. Eighty-five naturally infected dogs have been investigated, the most consistent clinical signs recorded were fever, emaciation and lymphoadenopathy, anemia, monocytosis, thrompocytopenia, hypoalbuminemia, elevation in liver enzymes and total bilirubin were the most remarkable changes asso...

Coinfection Associated with Naturally Occurring Cryptosporidiosis in Broilers

Structures and Properties of Naturally Occurring Polyether Antibiotics

Polyether ionophores represent a large group of natural, biologically active substances produced by Streptomyces spp. They are lipid soluble and able to transport metal cations across cell membranes. Several of polyether ionophores are widely used as growth promoters in veterinary. Polyether antibiotics show a broad spectrum of bioactivity ranging from antibacterial, antifungal, antiparasitic, ...

Structures of naturally occurring circular proteins from bacteria.

Bacteria produce a wide variety of both proteinaceous and nonproteinaceous molecules for defense, mediation of microbial competitions, and signaling purposes. Of the proteinbased molecules, there are examples of large folded polypeptides that are translated conventionally from genes as well as smaller peptides that are assembled nonribosomally by peptide synthetases (41). The latter often conta...