High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings

Micro-electronic devices often undergo significant self-heating when biased to their typical operating conditions. This paper describes a convenient ...

university of tsukuba

An asymptomatic nodule appeared in the right temporal region of an 81-year-old woman. Histopathologic examination confirmed significant thickening of the vascular wall, constriction of the vessel lumen, and infiltration of numerous eosinophils and lymphocytes. Giant cells were not seen. Lymphoid follicles and capillaries surrounded the large vessel. Elastica van Gieson staining revealed a laceration of the internal elastic lamina. Based on these clinical and histologic findings, the patient was diagnosed as having juvenile temporal arteritis (JTA), a disease first proposed by Lie and his colleagues in 1975. Three years later, a new eruption, again asymptomatic, appeared in the posterior region of the patient's right ear. Subsequently, she was referred to our department. Histologic examination of the new lesion confirmed the infiltration of lymphocytes and eosinophils, which was accompanied by numerous lymphoid follicles, and the proliferation of endothelial cells and capillaries from the deep dermis to the subcutaneous tissue. The patient was diagnosed as having Kimura disease, which is a persistent and recurrent illness. We hypothesized that JTA was a partial expression of Kimura disease and investigated whether past cases of JTA could be considered Kimura disease. As a result, we found that most cases of JTA could indeed be considered Kimura disease. Furthermore, we examined the vascular changes in the routinely and elastic fiber-stained sections of three cases with Kimura disease and two cases with angiolymphoid hyperplasia with eosinophilia. The results showed occlusive vascular changes in most samples from these cases, supporting the hypothesis that JTA is an accessory lesion of Kimura disease.

Juvenile temporal arteritis is a manifestation of Kimura disease.

Stress proteins (heat shock proteins, HSPs) have been proposed as general biomarkers for environmental monitoring. In the present study, we evaluated the environmental stress-burden on the aquatic midge Chironomus yoshimatsui using hsp70 expression. Larvae collected from streams receiving polluted runoff (field strain) were resistant to the organophosphorus insecticide, fenitrothion (F), and the synthetic pyrethroid, ethofenprox (E), whereas a strain originally collected from an unpolluted area (susceptible strain) showed low resistance to insecticide exposure. To examine the expression of an HSP70 gene in C. yoshimatsui, an hsp70 cDNA probe was prepared using RNA obtained from the field strain larvae and used for Northern blot analyses. The expression of this HSP70 gene in larvae collected from two field sites in May about 1 week after insecticide spraying in the fields was 2.3 (p = 0.018) to 3.3 fold higher than that in the susceptible strain and was also 4.6 and 1.4 (p = 0.033) fold higher than those collected in November 3 months after the cessation of insecticide spraying. In order to identify potential inducers of the HSP70 gene of the field strain, larvae of the susceptible strain were exposed to F or E for 24 h and hsp70 mRNA levels determined. Exposures to F at 0.4 microg/L and E at 1.1 microg/L increased hsp70 mRNA levels 2.7 (p = 0.049) and 4.4 (p = 0.043) fold over controls, respectively. These results suggest that larvae collected from polluted areas are burdened by environmental stressors and the tested insecticides are potential inducers of HSP70. The results also support the suggestion that HSP70 gene expression is a sensitive indicator of low level (nonlethal) exposures to certain insecticides.

Activation of a stress-induced gene by insecticides in the midge, Chironomus yoshimatsui.

We study the transverse magnetic (TM) electromagnetic cavity mode wave functions for an ideal equilateral triangular microstrip antenna (MSA) exhibiting C 3v point group symmetry. When the C 3v operations are imposed upon the antenna, the TM(m,n) modes with wave vectors [Formula: see text] are much less dense than commonly thought. The R 3 operations restrict the integral n and m to satisfy [Formula: see text], where [Formula: see text] and [Formula: see text] for the modes even and odd under reflections about the three mirror planes, respectively. We calculate the forms of representative wave functions and the angular dependence of the output power when these modes are excited by the uniform and non-uniform ac Josephson current sources in thin, ideally equilateral triangular MSAs employing the intrinsic Josephson junctions in the high transition temperature T c superconductor Bi2Sr2CaCu2 [Formula: see text], and fit the emissions data from an earlier sample for which the C 3v symmetry was apparently broken.

Chiharu Watanabe

Institute for Materials Science

university of tsukuba

High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings

Chiharu Watanabe

.css-o250i3{font-size:18px;font-family:Open Sans,sans-serif;line-height:21.6px;}Institute for Materials Science

university of tsukuba

High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings

Institute for Materials Science