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  • 1
    Electronic Resource
    Electronic Resource
    Enhanced electron spin polarization in photoemission from thin GaAs (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 55 (1989), S. 1686-1688 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The polarization of photoemitted electrons from thin GaAs layers grown by molecular beam epitaxy has been measured. Polarization as high as 49% was observed for a 0.2-μm-thick GaAs sample at excitation photon wavelengths longer than 750 nm. The maximum polarization is dependent on the thickness of the GaAs layer, decreasing to about 41% for a 0.9-μm-thick GaAs sample.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.102236
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  • 2
    Electronic Resource
    Electronic Resource
    CoZrMo amorphous films as a soft adjacent layer for biasing magnetoresistive elements with a current shunt layer (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 4023-4025 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Sputtered Co94−xZr6Mox (4.4≤x≤17 at. %) films have been investigated as a soft-adjacent-layer (SAL) material for trilayered magnetoresistive (MR) sensors with a MR element layer, a current shunt layer, and a SAL for biasing layer. The saturation magnetization 4πMs linearly decreases from 14 to 3 kG with an increase in Mo content. The magnetic anisotropy field Hk decreases to a low value, equivalent to that for NiFe MR films, as the Mo content is increased. The magnetoresistance ratio Δρ/ρ is negative, but sufficiently small, namely one-hundredth of that for NiFe films, while the electrical resistivity ρ, about 140 μΩ cm, is 5.6 times greater than that for NiFe films. The films also have a small magnetostriction coefficient λs on the order of 10−7. A 500-A(ring)-thick CoZrMo film with 12 at. % Mo content is selected as the SAL, because a lesser thickness causes an extreme increase in Hk. Higher Mo content degrades the temperature characteristics of the magnetic properties, due to the lower Curie temperature. Trilayered MR-sensors, 100 μm in length and 10 μm in width, are fabricated with a 400-A(ring)-thick NiFe MR layer, a 400-A(ring)-thick Ti layer, and a SAL using this CoZrMo film. An excellent biasing level is achieved with a 15-mA sense current on the MR sensors. CoZrMo amorphous films have a superior capability as a SAL material, especially for the trilayered MR sensors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340537
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  • 3
    Electronic Resource
    Electronic Resource
    Read efficiency measurements for thin film heads (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 57 (1985), S. 3955-3957 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Read efficiency values for thin film heads have been measured using a readback voltage integration method. Read efficiency η can be expressed by η=Φh/Φm, where Φh is the magnetic flux linking coil turns in the head and Φm is the magnetic flux emanating from the recorded region in the media. Readback voltages were integrated digitally and converted into integrated waveforms, which correspond to Φh. High read efficiency values, 87 and 91%, were measured for a thin film head and a MnZn ferrite head, respectively, using 8-in. CoNiP plated disks at below 0.19 μm flying height and at below 5-kFRPI recording densities. Integrated waveforms for thin film heads had square shapes with overshoots and undershoots. The peak values for these overshoots and undershoots reflect pole piece configurations and/or their magnetic properties. This readback voltage integration method is efficient for evaluating thin film head performance experimentally.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.334875
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  • 4
    Electronic Resource
    Electronic Resource
    Involvement of Postsynaptic EP4 and Presynaptic EP3 Receptors in Actions of Prostaglandin E2 in Rat Supraoptic Neurones (2002)
    Oxford, UK : Blackwell Science, Ltd
    Journal of neuroendocrinology 14 (2002), S. 0 
    Details
    ISSN: 1365-2826
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: We have reported that supraoptic nucleus (SON) neurones are excited by prostaglandin E2 (PGE2) presumably via dual postsynaptic PG receptors, FP receptors and unidentified EP receptors, and that presynaptic EP receptors may also be involved in the excitation. In the present study, to clarify the receptor mechanism of the PGE2-mediated actions on SON neurones, we studied the pre- and postsynaptic effects of four newly developed EP agonists that are selective for each of the four EP receptors, EP1−4, on rat SON neurones using extracellular recording and whole-cell patch-clamp techniques. The EP4 agonist ONO-AE1-329 mimicked the excitatory effects of PGE2, whereas the EP1 agonist ONO-DI-004, the EP2 agonist ONO-AE1-257 and the EP3 agonist ONO-AE-248 had little or no effect. The effects of ONO-AE1-329 were unaffected by the EP1/FP/TP antagonist, ONO-NT-012, which potently suppressed the excitation caused by the FP agonist fluprostenol and PGE2. ONO-AE1-329 caused marked excitation when responses to fluprostenol were desensitized by repeated applications of fluprostenol. Patch-clamp analysis in SON neurones showed that ONO-AE1-329 induced inward currents at a holding potential of −70 mV and the reversal potential of the currents was −35.1 ± 2.3 mV. On the other hand, the frequency of spontaneous inhibitory postsynaptic currents recorded from SON slice preparations was suppressed by ONO-AE-248, but unaffected by the other three EP agonists. These results suggest that SON neurones possess postsynaptic EP4 receptors and that γ-aminobutyric acid neurones innervating SON neurones possess presynaptic EP3 receptors in their terminals. Activation of the two EP receptors may be involved in the excitatory regulation of SON neurones by PGE2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2826.2002.00741.x
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  • 5
    Electronic Resource
    Electronic Resource
    Mechanisms of Cytosolic Ca2+ Suppression By Prostaglandin E2 Receptors in Rat Melanotrophs (2003)
    Oxford, UK : Blackwell Science Ltd
    Journal of neuroendocrinology 15 (2003), S. 0 
    Details
    ISSN: 1365-2826
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: We have previously reported that voltage-dependent Ca2+ (VDC) channels of rat melanotrophs are inhibited by prostaglandin E2 (PGE2). In this study, mechanisms involved in the inhibitory actions of PGE2 receptors of rat melanotrophs were analysed using reverse transcriptase-polymerase chain reaction (RT-PCR), Ca2+-imaging and whole-cell, patch-clamp techniques with recently developed EP agonists, each of which is selective for the known four subclasses of EP receptors (EP1–4). PGE2 reversibly suppressed the cytosolic Ca2+ concentration ([Ca2+]i). The maximum reduction in [Ca2+]i by PGE2 was comparable to that by dopamine or to that by extracellular Ca2+ removal. RT-PCR analysis of all four EP receptors revealed that EP3 and EP4 receptor mRNAs were expressed in the intermediate lobe. The effects of PGE2 to suppress [Ca2+]i were mimicked by the selective EP3 agonist, ONO-AE-248, whereas three other EP agonists, ONO-DI-004 (EP1), ONO-AE1-259 (EP2) and ONO-AE1-329 (EP4), had little or no effect on [Ca2+]i. All four G-protein activated inward rectifying K+ (GIRK) channel mRNAs were identified in intermediate lobe tissues by RT-PCR. Dopamine concentration-dependently activated GIRK currents, whereas PGE2 did not activate GIRK currents, even at the concentration causing maximal inhibition of VDC channels. These results suggest that PGE2 acts on EP3 receptors to suppress Ca2+ entry of rat melanotrophs by selectively inhibiting VDC channels of these cells. We have compared the possible cellular and molecular mechanisms of inhibition by dopamine and PGE2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2826.2003.00864.x
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  • 6
    Electronic Resource
    Electronic Resource
    Residency and movement of stream-dwelling Japanese charr, Salvelinus leucomaenis, in a central Japanese mountain stream (2002)
    Oxford, UK : Munksgaard International Publishers
    Ecology of freshwater fish 11 (2002), S. 0 
    Details
    ISSN: 1600-0633
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract – The residency and movement of stream-dwelling adult (2+ and older) Japanese charr, Salvelinus leucomaenis, were studied by mark and recapture experiments in the Jadani Stream, a headwater tributary of the Tedori River, central Japan, from 1986 to 1989. Of the marked fish, 31.3–58.3% were recaptured in the same pools where they had been caught during the study periods of summer (June–August), autumn (August–November) and winter–spring (November to the next June) and no seasonal movement was observed. The mean distances that the fish moved during the study periods ranged from 139.0 to 502.3 m and many movements longer than 1000 m were observed. Between the resident and the moved fish, there was little difference in body length, growth rate or sex. For the fish that had been resident in the same pools and riffles at previous recaptures, most fish were recaptures in the same locations at the next recapture. Conversely, for the fish that moved previously, most fish were recaptured in different locations from previous sites at the next recapture. These results suggest that Japanese charr exhibit relatively high residency throughout the year, but many fish moved longer distance. The results also suggest the presence of static and mobile components in the charr population.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1034/j.1600-0633.2002.00014.x
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  • 7
    Electronic Resource
    Electronic Resource
    Studies on polishing of Ti and Ag–Pd–Cu–Au alloy with five dental abrasives (2001)
    Oxford UK : Blackwell Science Ltd
    Journal of oral rehabilitation 28 (2001), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Titanium (Ti) and Ag–Pd–Cu–Au alloy were examined for their polishing behaviour by conducting manually controlled polishing tests using five dental abrasives [carborundum point (CR) and silicone points (R1 and R2)] driven by a high torque micromotor with rotational speeds ranging from 2000 to 15 000 r.p.m. Polishing of Ti resulted in less volume of removal upon polishing, a rougher surface and larger loss of abrasives, compared with polishing of Ag–Pd–Cu–Au alloy. Polishing of Ti with a rotational speed of 15 000 r.p.m. led to the largest volume of removal upon polishing, whilst that of 10 000 r.p.m. produced the optimal volume for Ag–Pd–Cu–Au alloy. It was concluded that Ti was much more difficult to polish, requiring special care (e.g. frequent exchange of abrasives). Development of new abrasives for polishing Ti is required.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2842.2001.00737.x
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  • 8
    Electronic Resource
    Electronic Resource
    The effects of polishing and bleaching on the colour of discoloured teeth in vivo (2001)
    Oxford UK : Blackwell Science Ltd
    Journal of oral rehabilitation 28 (2001), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Bleaching is an effective method for restoring the colour of discoloured vital teeth. Power bleaching, in particular, in which a bleaching solution containing 35% hydrogen peroxide is activated by a strong light source using a plasma arc, makes it possible to bleach teeth effectively in a short time. The purpose of this study was to determine how polishing or power bleaching the tooth surface affects tooth colour. The subjects selected were patients who had slightly discoloured teeth. The colour of precisely identified sites on six anterior teeth was measured before treatment, after polishing and after bleaching, to ascertain changes in colour. The measurements revealed that tooth colour changes slightly after polishing, but it shows a much greater change after bleaching, and that the post-bleaching change in tooth colour was caused both by elevation of lightness and reduction of yellowness. They also revealed that the colour difference between pre-treatment and post-bleaching does not depend on the type of tooth. These results suggested that power bleaching is an effective technique for improving slightly discoloured vital teeth, regardless of the type of tooth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2842.2001.00762.x
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  • 9
    Electronic Resource
    Electronic Resource
    Facial asymmetry in patients with cervicobrachial pain and headache (2001)
    Oxford UK : Blackwell Science Ltd
    Journal of oral rehabilitation 28 (2001), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: An increasing number of patients are visiting our hospital who have a chief complaint of neck and shoulder pain and/or headache but who do not have temporomandibular disorders (TMD). We carried out this study with a view to comparing the asymmetry of the facial skeleton or expression of such patients with those of healthy subjects. The incidence of such symptoms of patients and healthy subjects was examined by means of questionnaires. Asymmetry of the facial skeleton of patients was investigated by means of posterioanterior (PA) cephalograms. Facial asymmetry was analysed using the frontal view photographs of faces. We found that the patients had a higher incidence of various symptoms, including fatigability and irritability, in addition to neck and shoulder pain and headache, than the healthy subjects did. Both the healthy subjects and the patients had mandibular skeletal asymmetry to some degree, however, there was no significant difference between the two groups. On the other hand, the patients had a greater level of asymmetry of facial expression, chiefly of the lower face, than the healthy subjects did.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2842.2001.00766.x
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  • 10
    Electronic Resource
    Electronic Resource
    Development of heat-stable recombinant rinderpest vaccine (1989)
    Springer
    Archives of virology 107 (1989), S. 225-235 
    Details
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Recombinant vaccinia virus (RVV) containing the full-length cDNA of rinderpest virus (RV)-haemagglutinin (H) gene was constructed. The H gene was inserted into the attenuated vaccine strain of vaccinia virus (VV), Lc 16 m0, with two different promoters, namely cowpox virus A-type inclusion body (ATI) promoter or VV 7.5 kilodalton (P7.5) promoter. These RVVs produced the same sized fully glycosylated RV-H protein in RK 13 cells as that of the authentic RV-H. Their heat stability in the lyophylized state was similar to that of the parental VV. All rabbits immunized with these RVVs produced virus neutralizing (VN) antibody to RV as well as anti RV-H antibody. Four weeks after immunization, these animals were challenged with RV intravenously. None of the RVV-immunized rabbits developed any clinical signs of RV infection except one which was immunized with RVV containing the ATI promoter and developed low VN titer. These results indicate the possibility of developing a heat-stable recombinant vaccine for the eradication of rinderpest in tropical countries without cold storage systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01317919
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