title: Perovskites in the comb roof base of hornets: their possible function.
abstract: On the ceiling of the Oriental hornet comb cell, there are mineral granules of polycrystalline material known to belong to the group of perovskites. In a comb cell intended to house a worker hornet, the roof base usually carries one or several such perovskite granules containing titanium (Ti), whereas in the roof base of a cell housing a developing queen, there are usually several granules containing a high percentage of silicon (Si), aluminum (Al), calcium (Ca), and iron (Fe), but very little if any Ti. In worker comb cells, Ti usually appears as ilmenite (FeTiO3). Besides documenting the above-mentioned facts, this report discusses possible reasons for the appearance of ilmenite crystals in worker cells only and not in queen cells.
authors.affiliation: Department of Physiology and Pharmacology, Sackler Faculty of Medicine, Tel Aviv University, Ramat Aviv 69978, Israel. physio7@post.tau.ac.il
authors.forename: J S
authors.initials: JS
authors.lastname: Ishay
authors.forename: Z
authors.initials: Z
authors.lastname: Joseph
authors.forename: D
authors.initials: D
authors.lastname: Galushko
authors.forename: N
authors.initials: N
authors.lastname: Ermakov
authors.forename: D J
authors.initials: DJ
authors.lastname: Bergman
authors.forename: Z
authors.initials: Z
authors.lastname: Barkay
authors.forename: I
authors.initials: I
authors.lastname: Stokroos
authors.forename: J
authors.initials: J
authors.lastname: van der Want
mesh_terms: D000535:Aluminum / Q000032:analysis; D000818:Animals; D017610:Calcium Compounds / Q000032:analysis / Q000737:chemistry*; D003460:Crystallization; D006927:Hymenoptera / Q000502:physiology; D007501:Iron / Q000032:analysis; D008855:Microscopy, Electron, Scanning; D010087:Oxides / Q000032:analysis / Q000737:chemistry*; D012825:Silicon / Q000032:analysis; D014025:Titanium / Q000032:analysis / Q000737:chemistry* / Q000502:physiology
chemical_list: D017610:Calcium Compounds; D010087:Oxides; C029232:ilmenite; C059910:perovskite; D000535:Aluminum; D014025:Titanium; D007501:Iron; D012825:Silicon