Physico-chemical property of Silkworm (Bombyx mori) blood and Hasumon Yoto(Spodoptera litura) blood

Abstract

To account for the dispersion state of insect blood cell, the flow property of blood of Bomhyx mori and Spodoptera litura is studied by viscosity measurement. In this experiment, three different types of sources of silkworm blood are used. The first one is the source of the original wild type of silkworm (Original type) and it has a yellow color. The second type of source is obtained from the regular type of silkworm (Regular type) and it has a white color, and the third one has the same origin as the second type (ATLANTIS) but it is obtained from a hatched egg brought back from the space shuttle put on the orbit of ATLANTIS. The Bomhyx mori blood shows a non-Newtonian flow behavior and a high viscosity value is observed at a low shear rate. The viscosity value of blood obtained from the beginning stage of the five ages of silkworm decreases, and this stage is the same stage as that containing the largest amount of N-Acetyl Neuraminic acid (NANA) in blood. The non-Newtonian flow behavior and viscosity value of the Spodoptera litura blood are shown as smaller than that of Bomhyx mori blood, and these flow properties depend on the dispersion state of the blood cell particles. From the result of an electron micrograph, it is shown that shape and aggregate structure of blood of Bomhyx mori are more complicated than those of a mammal. From this result, the schematic model of a silkworm blood cell is derived.