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Research was conducted to study the wide supercooled liquid region and soft magnetic properties of Fe(sub 56)Co(sub 7)Ni(sub 7)Zr(sub 0-10)Nb (or Ta)(sub 0-10)B(sub 20) amorphous alloys. The objective is to search for a new amorphous alloy with a wide supercooled liquid region before crystallization and good soft magnetic properties. Results showed that glass transition and supercooled liquid region occurred in the temperature range before crystallization.

A study was conducted to analyze iron-based soft magnetic amorphous alloys supporting a wide supercooled liquid area. The glass transition was monitored in the composition range followed by a supercooled liquid region in a specific temperature range. Changes in the glass transition temperature were then represented against the onset temperature of crystallization. It is anticipated that magnetic properties and the supercooled liquid region will promote a novel ferromagnetic bulk amorphous alloys.

Focuses on an experiment which succeeded in synthesizing the amorphous alloys with the wide supercooled liquid region before crystallization. Indepth look at the experimental procedure; Detailed information on the results.

New Fe-based and Co-based amorphous alloys with a high B concentration of 30at% were formed in [(Fe,Co,Ni).sub.62][Nb.sub.8][B.sub.30] system. The amorphous alloys exhibit a wide supercooled liquid region ([Delta] [T.sub.x]) above 80K before crystallization in the range of 5 to 40%Co and 0 to 10%Ni and the largest [Delta] T, is 87K for [Fe.sub.52][Co.sub.10][Nb.sub.8][B.sub.30]. The [Fe.sub.62-x] [Co.sub.x][Nb.sub.8][B.sub.30] alloys exhibit good soft magnetic properties i.e., low coercive force ([H.sub.c]) of 2-3 A/m, high effective permeability ([[micro].sub.e]) of 20000-30000 at 1kHz and low saturated magnetostrietion ([Lambda.sub.s]) of 2-8 x [10.sup.-6]. The high [[micro].sub.e] characteristics are maintained in a higher frequency range and the highest [[micro].sub.e] at 1kHz is 7500 for [Co.sub.40][Fe.sub.22][Nb.sub.8][B.sub.30] with a high resistivity of 237[micro][Ohms]cm. The finding of the [(Fe,Co).sub.62][Nb.sub.8][B.sub.30] amorphous alloys exhibiting large [Delta][T.sub.x], good high-frequency permeability and high resistivity is encouraging the future development as a new soft magnetic materials. Index Terms--amorphous alloy, glass transition, soft magnetic properties, high-frequency permeability

Presents information on a study which examined the glass transition and supercooled liquid region in the temperature range before crystallization in iron...cobalt...nickel...hafnium...niobium...tantalum...boron alloys. Experimental procedure; Results and discussion; Conclusions.

Endometriosis, adenomyosis and leiomyomata develop in women of reproductive age and regress after menopause or ovariectomy, suggesting that they grow in an oestrogen-dependent fashion. We investigated whether polymorphism in the oestrogen receptor-alpha (ERalpha) gene is related to oestrogen-dependent benign uterine disease. A total of 203 women with regular menstrual cycles underwent laparotomy or laparoscopy and were diagnosed histologically with endometriosis, adenomyosis and/or leiomyomata. Patients with cervical carcinoma in situ, tubal occlusion or adhesion but no other gynaecological disease were considered to be disease-free. A total of 179 women undergoing annual health examination were grouped as reference population. The distribution of PVUII genotypes (PP, Pp, and pp) of the ERalpha gene was different between each pair of the four groups of endometriosis, adenomyosis/leiomyomata, disease-free, and reference population (P = 0.022-0.0005), except between the former two groups. The PP genotype was less frequent in the groups of endometriosis (P = 0.0002) and adenomyosis/leiomyomata (P = 0.002) as compared to that in the disease-free group. In the endometriosis group, there was no difference in the distribution of PVUII genotypes due to complicating diseases (adenomyosis and/or leiomyomata) or severity of the clinical stages. These results suggest that the PVUII polymorphism of the ERalpha gene is associated with the risk for endometriosis, adenomyosis, and leiomyomata. [ABSTRACT FROM AUTHOR]

Deciduous teeth affected by dentinogenesis imperfecta were obtained from two patients with osteogenesis imperfecta. Electron microscopy of the dentin revealed some structural alterations. The striation of the collagen fibrils was not clear, and the crystals were less dense than in normal detain. The amino acid analysis of dentin collagen was slightly different from normal dentin. There were slight increases in the amounts of hydroxylysine, serine and acidic acids. On the other hand, lysine and arginine were reduced. The elevation of hexosyllysine content and an increase of carbohydrate were also observed. These results indicate that either dentin collagen is altered, or noncollagenous matrices associated with collagen arc increased in dentinogenesis imperfecta dentin. [ABSTRACT FROM AUTHOR]

Surface antigenic specificities of human thymus-derived (T) lymphocytes were studied by cytotoxicity tests using a heterologous rabbit anti-human thymus serum. This serum showed higher cytotoxic titres on thymocytes by comparison with peripheral lymphocytes. After proper absorption the antiserum was non-toxic for chronic lymphatic leukaemia cells, but lysed tile majority of thymocytes. It also lysed some of peripheral lymphocytes. corresponding to those lymphocytes which bound sheep erythrocytes CE) hut not erythrocyte- antibody-complement complexes (EAC). Pretreatment of lymphocytes with the absorbed antiserum and complement. completely abrogated rosette formation with E but spared EAC-binding lymphocytes. It also eliminated their reactivity to phytohaemagglutinin and concanavalin A. These findings indicate that the absorbed serum causes selective lysis of I cells. The results obtained from quantitative absorption studies suggest that a certain loss of T-cell antigens is brought about during the differentiation of thymocytes into peripheral T cells. [ABSTRACT FROM AUTHOR]

Xenoantisera, designated AT48 and A172, were developed by immunizing rabbits with human thymus cell membrane and guinea-pigs with a T-cell glycoprotein purified from leukaemic T-cell membrane. Whereas AT48, after appropriate absorption, reacted exclusively with the majority of thymocytes (mainly cortical thymocytes) among normal lymphoid populations. AT72 reacted with virtually all of the thymus and T cells but not with B cells. Thymocytes, which were strongly reactive with AT72, existed in the thymic medulla, but cortical cells were also very weakly reactive with AT72. When cultured T-cell lines, all of which were derived from patients with T-cell-type acute lymphatic leukaemias, were tested for their reactivities with AT48 and AT72 by immunofluorescence. we found that AT48 stained certain T-cell lines, whereas AT72 stained all of the T-cell lines tested so far. Immunochemical data showed that AT48 precipitated a 48K molecular weight (mol. wt) glycoprotein from 125I-labelled thymus cell surface glycoproteins, which appeared to be very weakly associated with a 12K mol. wt component. These 48K and 12K mol. Wt. components precipitated by AT48 showed almost identical isoelectric points (pI) to those of HLA heavy chain and β2-microglobulin respectively. AT72, on the other hand, precipitated a 72K mol. Wt. glycoprotein from thymus and T cells as well as from leukaemic T cells. A less prominent 65K mol. wt glycoprotein was also precipitated by AT72 from thymus and T cells but not from leukaemic T cells. These two components showed almost identical pI ranging approximately from 4 to 7, and this marked charge heterogeneity observed was reduced by neuraminidase treatment, suggesting that it reflects the heterogeneity in sialylation of this molecular species. We concluded from these data that AT48 and AT72 used in this work could detect human homologues of mouse TL and Ly 1 antigens respectively. [ABSTRACT FROM AUTHOR]