Development requires fertilization by a single sperm. In Caenorhabditis elegans, fertilization occurs in a sperm-filled spermatheca, implying the barrier to polyspermy is generated in this compartment. Eggshell chitin synthesis is initiated at fertilization, and chitin is deposited before the zygote exits the spermatheca. Whereas polyspermy is very rare in wild-type, here we report an incidence...

Knowledge of oviposition sites selected by wetland mosquitoes could improve mosquito control and guide wetland rehabilitation practices to avoid creating or exacerbating a mosquito problem. Two studies that enumerated Aedes vigilax eggshells found in salt marsh soil on the western portion of Kooragang Island in New South Wales, Australia, allowed an evaluation of oviposition sites. In one study...

OBJECTIVE The purpose of this study was to assess the role of known suspicious sonographic findings and to find other additional sonographic findings to differentiate benign and malignant thyroid nodules with "eggshell" calcifications. METHODS Our Institutional Review Board approved this retrospective study, and informed consent was not required. We reviewed sonographic findings of thyroid no...

Efficiently obtaining full-length cDNA for a target gene is the key step for functional studies and probing genetic variations. However, almost all sequenced domestic animal genomes are not 'finished'. Many functionally important genes are located in these gapped regions. It can be difficult to obtain full-length cDNA for which only partial amino acid/EST sequences exist. In this study we repor...

ENWEndNote BIBJabRef, Mendeley RISPapers, Reference Manager, RefWorks, Zotero AMA Huamán-Mujica K, Castañeda-Vía JA, Bermúdez García VS, et al. Dentinal tubules obliteration using a toothpaste with nano-hydroxyapatite obtained from chicken eggshell. Journal of Stomatology. 2022. doi:10.5114/jos.2022.119082. APA Huamán-Mujica, K., Castañeda-Vía, J. A., García, V. S., Dominguez, Landauro, C. V., ...

This study aimed at evaluating the effect of dietary calcium levels and the replacement of calcium sources with different particle size compositions on the performance and egg quality of brown layers in their second egg production cycle. A randomized block experimental design was applied with 12 treatments in a 3x4 factorial arrangement: three calcium levels (2.6, 3.2, 3.8 %) and four combinati...

The morphogenesis of structures with repeated functional units, such as body segments and appendages, depends on multi-domain patterns of cell signaling and gene expression. We demonstrate that during Drosophila oogenesis, the two-domain expression pattern of Broad, a transcription factor essential for the formation of the two respiratory eggshell appendages, is established by a single gradient...

Biliverdin is an important pigment in the eggshell of chickens and other avian species. Determination of the biosynthesis site for biliverdin is essential for understanding the biochemical process and genetic basis of eggshell pigmentation. Either blood or the shell gland could be the biosynthesis site of eggshell biliverdin. A segregation population with full-sib sisters genotyped Oo and oo, w...

Research at 10 locations in coastal subtropical Queensland, Australia, has shown that salt marshes contained heterogeneous distributions of eggshells of the pest and vector mosquito Aedes vigilax (Skuse) (Diptera:Culicidae). The eggshell distribution was related to specific vegetation assemblages, with a mix of the grass, Sporobolus virginicus (L.) Kunth (Poales: Poaceae), and the beaded glassw...

A chicken egg is an already packaged food. An important quality aspect of the packaging material is the mechanical strength of the eggshell. A commonly used technique for the measurement of the shell strength is the quasi-static, non-destructive compression of an egg between two parallel steel plates. The slope of the force-deformation curve is a measure for the stiffness of the shell and for t...