• Publications
  • Influence
Trypsin-like endopeptidases from the midguts of the larvae from the hornets of Vespa orientalis and Vespa crabro
The hornet proteases resemble bovine trypsin by such criteria as substrate specificity, inactivation by certain inhibitors and molecular weights, and these enzymes were stable at pH 8 but unstabe below pH 5.
The presence of insulin in and some effects of exogenous insulin on hymenoptera tissues and body fluids.
Radioimmunoassay technique has revealed the presence of insulin in the tissues of various Hymenopteran insects, including the honeybee Apis mellifera, the Oriental hornet Vespa orientalis and several other Paleoarctic social wasps, and laboratory determinations carried out in vivo and in vitro have shown that bovine insulin injected into insect hemolymph or incubated together with the hemoly mph causes a significant drop in the glucose level of the fluid.
Rhythms in acoustical communication by the oriental hornet, vespa orientalis
The particular ‘beat’ (spcificity) of each of the three sound groups has been investigated in an attempt to understand the significance of rhythms as a means of communication among hornets.
Alarm substances as toxicants of the oriental hornet, Vespa orientalis.
  • H. Saslavasky, J. Ishay
  • Biology, Medicine
    Life sciences. Pt. 2: Biochemistry, general and…
  • 8 February 1973
Abstract Aliphatic and cyclic ketones function as alarming and poisoning substances of various colony members of the Oriental Hornet, Vespa orientalis . Correlation of structure, alarming and
Electrical, thermoelectric and thermophysical properties of hornet cuticle
Seebeck effect (thermo-emf), thermal conductivity and electrical conductivity of social hornet cuticle were measured in a direction perpendicular to the cuticular surface. The obtained value of the
Pharmacological activity of oriental hornet (Vespa orientalis) venom.
The venom of Oriental hornet caused contraction of isolated smooth muscle preparations, bronchoconstriction in anesthetized guinea pigs and when injected intradermally into rats and rabbits increased the permeability of microcirculation vessels.
Enzymatic and chemical properties of an endopeptidase from the larva of the hornet Vespa crabro.
The catalytic properties of the hornet protease are similar to those of bovine chymotrypsin with respect to inactivation by phenylmethanesulfonyl fluoride and carbobenzoxyphenylalanine chloro ketone and preferential peptide bond cleavage at aromatic amino acid residues.
Glucose levels in Vespa orientalis: the effect of starvation.
  • J. Ishay
  • Biology, Medicine
    Comparative biochemistry and physiology. A…
  • 1975
The larvae saliva contains a factor (or factors) which produces hyperglycemia in larval haemolymph in vitro, and addition of mammalian insulin partially depresses the resultant hyper glycemia.
Thermoregulation by social wasps: behavior and pheromones.
  • J. Ishay
  • Biology, Medicine
    Transactions of the New York Academy of Sciences
  • 1 June 1973
The venom apparatus of Vespa orientalis: morphology and cytology.
The anatomy and histology of the venom apparatus of Vespa orientalis has been investigated and the different extracts applied to cultures of liver cells produced an accumulation of fat within the cells, which is considered as a toxic change of the cells.