A vast majority of mollusks grow a hard shell for protection. The structure of these shells comprises several levels of hierarchy that increase their strength and their resistance to natural threats. This article focuses on nacreous shells, which are composed of two distinct layers. The outer layer is made of calcite, which is a hard but brittle material, and the inner layer is made of nacre, a...

Folding is a process in which bending is localized at sharp edges separated by almost undeformed elements. This process is rarely encountered in Nature, although some exceptions can be found in unusual layered rock formations (called 'chevrons') and seashell patterns (for instance Lopha cristagalli). In mechanics, the bending of a three-dimensional elastic solid is common (for example, in bulk ...

The idea that physical processes involved in biological development underlie morphogenetic rules and channel morphological evolution has been central to the rise of evolutionary developmental biology. Here, we explore this idea in the context of seashell morphogenesis. We show that a morphomechanical model predicts the effects of variations in shell shape on the ornamental pattern in ammonites,...

OBJECTIVES To investigate the effect of a seashell protein Haishengsu (HSS), an extract from a shellfish Tegillarca granosa, on cell growth and the expression of apoptosis genes in leukemia K562 cells. METHODS Cultured K562 cells were treated with HSS at various concentrations (10-40 mg/L). The cell cycle, cell growth and the expression of apoptosis suppressor gene bcl-2 and apoptosis promoti...

This paper deals with the evolution monitoring of biomass colonization and mechanical properties 3D printed eco-materials/mortars immersed in sea. Measurements tensile strength, compressive Young’s modulus were determined on samples deployed along Atlantic coast Europe, France, United Kingdom, Spain, Portugal. The manufactured using printing, where six mix designs a low environmental impact bin...

Species of Clavaria (Clavariaceae, Agaricales) collected from China were studied using morphological and molecular methods. Two species, C. aspersa hupingshanensis, are here described as new to science; possesses simple, white basidiomata in gregarious or scattered fascicles, whereas hupingshanensis rose-white seashell-pink caespitose clusters. In addition, amoenoides is a newly recorded specie...

This study reviews recent literature on the mechanical and durability properties of concrete incorporating seashells as partial or full substitutes for conventional materials. The summarizes various contributions elucidating waste utilized, growing worldwide aquaculture production, seashell material preparation treatment, chemical composition, physical properties, different test methods adopted...

The depletion of fossil fuel reserves with increased demand and global emissions has the search for eco-friendly renewable fuels a low environmental impact. Biodiesel can be considered as mono-alkyl esters long-chain fatty acids obtained from transesterification vegetable oils animal fats. Economically low-cost biodiesel production received considerable interest blending fossil-based diesel mor...