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Investigation of the temporal change of the sources of Aeolian dust delivered to East Asia using electron spin resonance signals in quartz

100%

Yamamoto Y. , Toyoda S. , Nagasima K. , Igarashi Y. , Tada R.

tom Vol. 40, no. 4

355--359

The temporal change in the number of oxygen vacancies in quartz was investigated by observing the E1’ center in the atmospheric depositions collected at two cities in Japan in the recent past. The depositions collected at Fukuoka in March show the ESR intensities being correlated with the sum of the number of the days, in the month, on which Kosa was observed while no such correlation was found in the deposition those collected at Akita but a trend of decrease with time. The present results suggest that the number of oxygen vacancies in quartz might be useful to estimate quantitatively the contribution of the dust originated from China to the atmospheric deposition in Japan.

Vasculitis and anaphylactoid shock induced in mice by cell wall extract of the fungus Candida metapsilosis

100%

Tada R. , Yamanaka D. , Nagi-Miura N. , Adachi Y. , Ohno N.

nr 2

To investigate whether cell wall mannan from Candida metapsilosis induces vasculitis similar to that in Kawasaki syndrome and ana-phylactoid shock in mice, we examined the pathogenic effects of C. metapsilosis cell wall extracts. Our results show that intraperitoneal injection of cell wall extracts induced severe coronary arteritis, and intravenous injection induced acute anaphylactoid shock similar to extracts from Candida albicans (C. albicans). Structural analysis of cell wall mannan from C. metapsilosis using NMR spectroscopy showed it to contain only α-mannan, indicating that α-mannan might be contributing to Candida pathogenicity by inducing coronary arteritis and acute shock.