Magnetization Curves of the Reentrant-Spin-Glass Fe_<0.65>Mn_<0.35>TiO_3 : Dependence on the Sweep Rate of Magnetic Fields(Magnetism)

The magnetization curves of the reentrant-spin-glass Fe_Mn_TiO_3 have been observed at 4.2 K and 1.4 K in applied fields with various sweep rates. Depending on the sweep rates and temperatures, the anomalous jumps of the magnetizations towards the values of the field-cooled-magnetization M^ are observed. This phenomenon is interpreted to be closely related to the properties of the spin-glass state

Supersonic nozzle flow in the two-phase ejector as water refrigeration system by using waste heat

Paper presented at the 9th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Malta, 16-18 July, 2012.In the near future the usage of waste heat in houses will be increased. The development of refrigeration system using waste heat is particularly needed for summer season consumptions. The ejector cycle can directly convert the thermal energy into the compression mechanical energy. Moreover, water which is one of the cleanest refrigerants can be used in the ejector cycle. As the steam ejector has been researched [1-3] as air conditioning system, the huge energy needed for large latent heat for water. We propose that the high-speed steam and water mixture, so-called two-phase flow, can be utilized instead of steam. It is theoretically shown that the heat need for this system will be reduced by the latent heat of hot water in two-phase flow, if the two-phase in the ejector flow has the same potential of acceleration and compression as steam. And the nozzle efficiencies for the two-phase flow of water are also obtained by the experiment

Decay Profiles and Spectra of Stimulated Luminescence in CdI2

Decay profiles and spectral distributions of the stimulated luminescence in Cdl2 crystals have been investigated at liquid nitrogen temperature under high density excitation with a N2-gas laser in the excitonic absorption band. The observed luminescence decay curve consists of two components, fast (< 20 ns) and slow (about 5 μs) ones. The slow component is identical to the main decay component of the spontaneous emission which is observed rather strongly in the case of low density excitation. The fast component is peculiar to the case of high density excitation, and is connected to the stimulated emission. This means that the stimulated luminescence appears in the early stage of the luminescence decay. The spectral distribution of the fast component, namely, the stimulated emission spectrum, consists of eight fine-structures and is different from the usual spontaneous emission spectum from self trapped exciton (STE) states. Discussions will be made on the origin of these structures relating it with fine-structures of the STE states

The effects of nifekalant hydrochloride on the spatial dispersion of repolarization after direct current defibrillation in patients with oral amiodarone and β-blocker therapy

AbstractBackgroundAlthough nifekalant hydrochloride (NIF) has been demonstrated to suppress ventricular tachyarrhythmias, especially electrical storms, the mechanism by which it does so is still unclear. We examined the effects of NIF on the spatial dispersion of repolarization (SDR) after implantable cardioverter-defibrillator (ICD) shock.Methods and ResultsIn 35 patients with oral amiodarone and β-blocker therapy, and an ICD, we recorded the 87-lead electrocardiogram during sinus rhythm (CONTROL-1 group) under general anesthesia, and just after the termination of induced ventricular fibrillation (VF) by ICD shock, with or without NIF administration. In all recordings, the corrected QT interval (QTc) was measured in each lead. The dispersion of QTc (QTc-D; maximum QTc minus minimum QTc) was also measured. Compared with that in the CONTROL-1 group, the QTc-D exhibited significant deterioration after ICD shock (61±14 and 90±19ms1/2, respectively; p<0.05). However, after the termination of induced VF by ICD shock with NIF administration, the QTc-D did not differ significantly from that in the CONTROL-1 group (63±20 and 61±14ms1/2, respectively).ConclusionsNIF suppressed the deterioration of the SDR after ICD shock. This might be one of the mechanisms by which NIF suppresses recurrence of ventricular tachyarrhythmia just after ICD shock in patients with oral amiodarone and β-blocker therapy

Up-regulation of ICAM-1 expression on human dermal fibroblasts by IFN β in the presence of TNF-α

AbstractUnstimulated human fibroblasts show low or undetectable ICAM-1 expression. Interferon-beta (IFN-β) at concentrations of 10,100, and 1000 IU/ml in the presence of tumor necrosis factor-alpha (TNF-α) significantly increased the ICAM-I expression of fibroblasts in a dose-dependent manner. Treatment with IFN-β alone, however, did not up-regulate the ICAM-1 expression. Furthermore the attachment of peripheral blood mononuclear cells (PBMCs) to cytokine-treated fibroblasts was increased. This augmented attachment was partly inhibited by anti-ICAM-1 antibody. These results suggest that IFN-β and TNF-α may cooperatively modulate the attachment of PBMCs in the dermis

An Attempt to Suppress the Induction of Contact Sensitivity to 2,4-Dinitrochlorobenzene by Tape Stripping Treatment of Guinea Pig Skin

The effect of stripping treatment with cellophane tape on induction of contact sensitivity (CS) to 2,4-dinitrochlorobenzene (DNCB) was studied in inbred JY1 strain guinea pigs in order to determine whether Langerhans cells (LC) are relevant to production of CS. Tape stripping of ear skin achieved, to a considerable degree but not absolutely, depletion of epidermal LC, as measured by cell surface of LC dedetcted by ATPase staining. However, pretreatment of tape stripping on the induction site of contact sensitization with DNCB did not diminish the rate and intensity of challenge reactions to DNCB