Twisting cracks in Bouligand structures.

The Bouligand structure, which is found in many biological materials, is a hierarchical architecture that features uniaxial fiber layers assembled periodically into a helicoidal pattern. Many studies have highlighted the high damage-resistant performance of natural and biomimetic Bouligand structures. One particular species that utilizes the Bouligand structure to achieve outstanding mechanical performance is the smashing Mantis Shrimp, Odontodactylus Scyllarus (or stomatopod).

Bio-inspired impact-resistant composites.

Through evolutionary processes, biological composites have been optimized to fulfil specific functions. This optimization is exemplified in the mineralized dactyl club of the smashing predator stomatopod (specifically, Odontodactylus scyllarus). This crustacean's club has been designed to withstand the thousands of high-velocity blows that it delivers to its prey.

Comparison of buffered and nonbuffered nasal saline irrigations in treating allergic rhinitis.

Objectives/hypothesis: We aimed to study the effect of alkalinity of isotonic nasal saline irrigation on nasal symptoms, mucociliary clearance, nasal patency, and patient's preference in patients with allergic rhinitis (AR).

Study Design: A double-blind, randomized, three-arm crossover study.

Methods: Patients with AR were enrolled.