Silks and silk-producing organs of Neotropical tarantula Avicularia metallica Ausserer, 1875 (Araneae: Mygalomorphae, Theraphosidae)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F44555601%3A13440%2F16%3A43886880" target="_blank" >RIV/44555601:13440/16:43886880 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.biotaxa.org/em/article/view/23797/22569" target="_blank" >http://www.biotaxa.org/em/article/view/23797/22569</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Silks and silk-producing organs of Neotropical tarantula Avicularia metallica Ausserer, 1875 (Araneae: Mygalomorphae, Theraphosidae)

Popis výsledku v původním jazyce

Silks and silk-producing organs of the theraphosid species Avicularia metallica were studied using scanning electron microscopy. The spinning apparatus is made up of two pairs of spinnerets located at the end of the ventral side of the opisthosoma. Both pairs of spinnerets are equipped with spigots (nozzle-like setae), i.e. external outlets of silk-producing glands which, in the case of posterior lateral spinnerets, are present on all three segments (sclerites). The secreted silk, which hardens when exposed to air, is processed by movements of spinnerets and the opisthosoma. An investigation of spinning activity revealed two different manners in which silk is affixed to the ground: (1) by smearing silk secretion directly onto the surface of the substratum; or (2) by attaching silken fibers onto a layer of adhesive silk of attachment fields. The fibers connecting the walls of tubular shelters to the silk of attachment fields are essentially bundles of parallel nanofibrils. The connection between multifibrillar connecting fibers and the adhesive silk of attachment fields is, in essence, &quot;silk-to-silk&quot; connection. Nanoglobules (spherical subunits) are the basic microstructural blocks in the studied silk materials irrespective of whether the fibrils are a part of the tube, connecting fibers, or attachment fields. SEM images showed that the liquid silk, running through spigot ducts, has two components, which do not mix as they leave the spigots. The peripheral component of the solidified protein mixture surrounds the central component, which has a granular appearance.

Název v anglickém jazyce

Silks and silk-producing organs of Neotropical tarantula Avicularia metallica Ausserer, 1875 (Araneae: Mygalomorphae, Theraphosidae)

Popis výsledku anglicky

Silks and silk-producing organs of the theraphosid species Avicularia metallica were studied using scanning electron microscopy. The spinning apparatus is made up of two pairs of spinnerets located at the end of the ventral side of the opisthosoma. Both pairs of spinnerets are equipped with spigots (nozzle-like setae), i.e. external outlets of silk-producing glands which, in the case of posterior lateral spinnerets, are present on all three segments (sclerites). The secreted silk, which hardens when exposed to air, is processed by movements of spinnerets and the opisthosoma. An investigation of spinning activity revealed two different manners in which silk is affixed to the ground: (1) by smearing silk secretion directly onto the surface of the substratum; or (2) by attaching silken fibers onto a layer of adhesive silk of attachment fields. The fibers connecting the walls of tubular shelters to the silk of attachment fields are essentially bundles of parallel nanofibrils. The connection between multifibrillar connecting fibers and the adhesive silk of attachment fields is, in essence, &quot;silk-to-silk&quot; connection. Nanoglobules (spherical subunits) are the basic microstructural blocks in the studied silk materials irrespective of whether the fibrils are a part of the tube, connecting fibers, or attachment fields. SEM images showed that the liquid silk, running through spigot ducts, has two components, which do not mix as they leave the spigots. The peripheral component of the solidified protein mixture surrounds the central component, which has a granular appearance.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

10613 - Zoology

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Ecologica Montenegrina

ISSN

2336-9744

e-ISSN

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Svazek periodika

2016

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

ME - Černá Hora

Počet stran výsledku

15

Strana od-do

313-327

Kód UT WoS článku

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EID výsledku v databázi Scopus

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