Journal ArticleDOI
GABA and taurine derivatives on the adhesive spiral of the orb web of Argiope spiders, and their possible behavioural significance
C. M. Anderson,E. K. Tillinghast +1 more
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Two strongly acidic, ninhydrin‐negative compounds were found in the water soluble fraction of the orb webs of Argiopes trifasciata and Argiope aurantia, and one is a derivative of taurine.Abstract:
. Two strongly acidic, ninhydrin-negative compounds were found in the water soluble fraction of the orb webs of Argiope trifasciata (Lucas) and Argiope aurantia (Forskal). One of these is a derivative of taurine. Aninhydrin-positive GABA derivative, gabamide, also exists in the water-soluble fraction of the web.read more
Citations
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Journal ArticleDOI
Modulation of the mechanical properties of spider silk by coating with water
Fritz Vollrath,Donald T. Edmonds +1 more
TL;DR: The araneus diadetnatus is made up of two types of thread with distinctive mechanical properties: stiff radial threads which sag when contracted by only 10%, and elastic circumferential 'capture' threads which can be contracted to less than 5% of their original length in the web without sagging as discussed by the authors.
Journal ArticleDOI
Compounds in the droplets of the orb spider's viscid spiral
Fritz Vollrath,Wayne J. Fairbrother,Robert J. P. Williams,Edward K. Tillinghast,David T. Bernstein,Kathleen S. Gallagher,Mark A. Townley +6 more
TL;DR: The chemical composition of this aqueous solution is investigated and the droplets are found to be a concentrated solution of hygroscopic substances related to neurotransmitters.
Journal ArticleDOI
Comparative study of orb web hygroscopicity and adhesive spiral composition in three araneid spiders
TL;DR: Orb web hygroscopicity was examined in three species of araneid spiders and it appears that organic LMW are more responsible for water adsorption by the adhesive spiral cover than inorgnic LMW.
Book ChapterDOI
Spider Nutrition: An Integrative Perspective
TL;DR: There is a tremendous opportunity to rapidly advance the understanding of spider nutrition, given a strong foundation in the natural history, behaviour, physiology and ecology of spiders and recent advances in analytical techniques and frameworks for studying nutrition.
References
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Journal ArticleDOI
Photometric ninhydrin method for use in the chromatography of amino acids.
Stanford Moore,William H. Stein +1 more
TL;DR: In the present investigations of the chromatographic separation of amino acids, it has been observed that, when the color development is carried out in tubes exposed to the air, these difficulties appear to result primarily from the influence of dissolved oxygen.
Book ChapterDOI
Microdetermination of Phosphorus
TL;DR: The method described in this paper has the greatest sensitivity, being able to demonstrate the presence of 0.10 μg of phosphorus per ml. It is based on the reduction of phosphomolybdate complex with ascorbic acid, and is essentially identical to the method published by Chen, Toribara and Warner (1956).
Journal ArticleDOI
Comparative studies of fibroins. II. The crystal structures of various fibroins.
TL;DR: In this article, it was shown that probably all the fibroins are made up of anti-parallel pleated sheets of polypeptide chains, the difference between the fibres produced by the silk-spinning organisms belonging to the orders Lepidoptera and Araneae has been attributed to the variation in, and sequence of, the amino acid residues composing the polyprotein chains.
Journal ArticleDOI
Hoppe-Seyler's zeitschrift fur physiologische chemie
TL;DR: Fortgeführt von A.Knoop, K.Thomas und K. Weitzel unter Mitwirkung von K.G.Thomas • Herausgegeben von a.L.