24 papers · ranked by Valyu relevance
Qi Zhang, Jianhang Zhou, Jing He, Xiaodong Cun + 2 more
'Bob Zhang'] Shells are very common objects in the world, often used for decorations, collections, academic research, etc. With tens of thousands of species, shells are not easy to identify manually. Until now, no one has proposed the recognition of shells using machine learning techniques. We initially present a shell…
Erynn H. Johnson
Bivalves protect themselves from predators using both mechanical and behavioral defenses. While their shells serve as mechanical armor, bivalve shells also enable evasive behaviors such as swimming and burrowing. Therefore, bivalve shell shape is a critical determinant of how successfully an organism can defend against…
Yuxuan Liu, Martin Lott, S. F. Seyyedizadeh, I. Corvaglia + 9 more
'Gabriele Greco' 'Vinícius F. Dal Poggetto' 'A. S. Gliozzi' 'Rocco Mussat Sartor' 'N. Nurra' 'C. Vitale-Brovarone' 'Nicola M. Pugno' 'Federico Bosia' 'M. Tortello'] Marine shells are designed by nature to ensure mechanical protection from predators and shelter for mollusks living inside them. A large amount of work has…
Roxanne M. W. Banker, Dawn Y. Sumner
Oysters are unusual among bivalves in that they possess chambers, often filled with soft, chalky calcite, that are irregularly scattered throughout the shell. Because the function of these so-called chalky deposits is still unclear, evaluating the growth and distribution of chalk is important for elucidating the…
Davin H. E. Setiamarga, Kazuki Hirota, Masa-aki Yoshida, Yusuke Takeda + 6 more
Despite being a member of the shelled mollusks (Conchiferans), most members of extant cephalopods have lost their external biomineralized shells, except for the Nautiloids. Here, we report the result of our study to identify major Shell Matrix Proteins and their domains in the Nautiloid Nautilus pompilius, in order to…
Heidi Hammond, Leandro Zilio, Amalia Nuevo-Delaunay, César Méndez + 1 more
The exchange of information and social interactions on broad spatial scales between human groups in the past can be studied through the provenance of key indicators of distant origin recorded at archaeological sites. The remains of shells of mollusk species, especially when crafted as elements of personal ornaments…
Weicheng Huang, Tianzhen Liu, Zhaowei Liu, Peifei Xu + 3 more
'Yuzhen Chen' 'K. Jimmy Hsia'] aSchool of Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU, UK bKey Laboratory of C & PC Structures of Ministry of Education, National Prestress Engineering Research Center, Southeast University, Nanjing 210096, China cDepartment of Engineering Mechanics, Hohai University…
Vincent Nijman, Denise Spaan, K. Anne-Isola Nekaris, Sebastian C. A. Ferse
In August 2005, 500 commercial topshell and 20 horned helmet shells were confiscated in the city of Bengkulu, Sumatra that had been collected in the waters off the island of Enggano . The news report made it clear that the horned helmets were confiscated because they were protected species, but stated that the…
Daniela M. Bernat, Guido L. Bacino, Paula A. Cristini, Mariana S. Addino
The preservation of remains is conditioned by biotic and abiotic characteristics that are determined by the environmental conditions; thus, taphonomic analysis may indicate environmental features. Estuaries are priority areas due to their socio-ecological importance; however, they are at risk due to climate change and…
Aydin Örstan
The distribution of the mean greater shell dimensions of 2446 genera of stylommatophoran land snails consists of two groups peaking at 3 mm and 15.3 mm. The 3-mm group includes the miniature snails whose adult shell dimensions range from almost 0.8 mm to less than 1.5 mm. Relative surface area, shell thickness and egg…
Antonio Valadão Cardoso, Rodrigo Novaes Ferreira
The mantle of bivalves plays a crucial role in the formation and maintenance of their shells through biomineralization. Detailed studies using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) analysis have revealed the presence of phosphorus (P) compounds as the primary phase during…
Antonio Valadão Cardoso, Rodrigo Novaes Ferreira
The mantle of bivalves plays a crucial role in the formation and maintenance of their shells through biomineralization. Detailed studies using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) analysis have revealed the presence of phosphorus (P) compounds as the primary phase during…
Fani Derveni, William Gueissaz, Yan Dong, Pedro M. Reis
The buckling of spherical shells is plagued by a strong sensitivity to imperfections. Traditionally, imperfect shells tend to be characterized empirically by the knockdown factor, the ratio between the measured buckling strength and the corresponding classic prediction for a perfect shell. Recently, it has been…
Davin H. E. Setiamarga, Kazuki Hirota, Risa Ikai, Seiji Imoto + 6 more
The Argonaut octopus, commonly called the paper nautilus, has a spiral-coiled shell-like eggcase. As the main characteristics, the eggcase has no internal septum, is composed entirely of calcite with chitosan being the main polycarbonate and is reportedly formed by organic materials secreted from the membranes of the…
Jennifer M. Miller, Elizabeth A. Sawchuk, Amy L. R. Reedman, Pamela R. Willoughby
'Pamela R. Willoughby'] Shell beads are well established in the archaeological record of sub-Saharan Africa and appear as early as 75,000 BP; however, most research has focused on ostrich eggshell (OES) and various marine mollusc species. Beads made from various land snails shells (LSS), frequently described as…
Carlotta Seno, Nico Reichholf, Francesco Salutari, Maria Chiara Spadaro + 7 more
A careful design of nanocrystal architecture can strongly enhance the nanocrystal function. So far, this strategy faced a synthetic bottleneck in the case of refractory oxides. Here, we demonstrate the epitaxial growth of hafnia shells onto zirconia cores, and pure zirconia shells onto europium doped zirconia cores.…
Abhinav Parakh, Mehrdad Toussi Kiani, Emily Lindgren, Anabelle Colmenares + 3 more
Colloidal nanoparticles can be coated with a conformal shell to form multifunctional nanoparticles. For instance, plasmonic, magnetic, and catalytic properties, chemical stability and biocompatibility can be mixed and matched. Here, a facile synthesis for depositing metal boride amorphous coatings on colloidal metallic…
Arefeh Abbasi, Fani Derveni, Pedro M. Reis
We investigate the effect of defect geometry in dictating the sensitivity of the critical buckling conditions of spherical shells under external pressure loading. Specifically, we perform a comparative study between shells containing dimpled (inward) versus bumpy (outward) Gaussian defects. The former has become the…
Luis M Burciaga, Guillermina Alcaraz
Hermit crabs (Paguroidea; Latreille [96]) offer great opportunities to study animal behaviour and physiology. However, the animals’ size and sex cannot be determined when they are inside their shell; information crucial to many experimental designs. Here, we tested the effects of the two most common procedures used to…
Fan Liu, Xihang Jiang, Lifeng Wang
Biological materials exhibit complex structure-property relationships which are only beginning to be elucidated. Understanding the underlying physical mechanisms of the structureproperty relationships is the key to designing bioinspired materials. The eggshell is an excellent example because many design trade-offs are…
Authors not listed
Scope: I introduce a reproducible, closed-surface mapping of the periodic system onto a sphere with a single equatorial ring, yielding a symmetric alternative to 2D layouts. The construction partitions the sphere into belts that match the cardinalities of the s/p/d/f blocks (2/6/10/14), places lanthanoids and actinoids…
Authors not listed
Bacterial microcompartments (BMCs) are protein-bound organelles found in some bacteria which encapsulate enzymes for enhanced catalytic activity. These compartments spatially sequester enzymes within semi-permeable shell proteins, and are packed full of enzyme cargoes and metabolites as they fulfill their function.…
António Checa, Julyan H. E. Cartwright, Marc‐Georg Willinger
1 Departamento de Estratigrafía y Paleontología, Facultad de Ciencias, Universidad de Granada, E-18071 Granada, Spain. 2 Instituto Andaluz de Ciencias de la Tierra, CSIC–Universidad de Granada, Campus Fuentenueva, E-18071 Granada, Spain. 3 Laboratorio Associado CICECO, Campus Universitario de Santiago, Universidade de…
Jason Calvin, Adam Sedlak, Amanda Brewer, Tierni Kaufman + 1 more
As synthesized, nanocrystal surfaces are typically covered by coordinating organic ligands. Prior to commercial applications, treatments are often utilized to exchange these native ligands for new ligands that can enhance the nanocrystal properties, such as electrical conductivity or luminescence. Understanding the…