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  • 1
    Electronic Resource
    Electronic Resource
    Utility of coaxial technique for renal angioplasty in patients with a difficult-to-cross stenosis (1999)
    Springer
    European radiology 9 (1999), S. 1586-1589 
    Details
    ISSN: 1432-1084
    Keywords: Key words: Aortic arch syndrome ; Arteries ; Renal transluminal angioplasty ; Arteritis ; Hypertension ; Aortitis ; Takayasu's arteritis ; Fibromuscular dysplasia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The aim of this study was to evaluate the feasibility of coaxial approach in difficult-to-cross lesions in patients with failed percutaneous transluminal renal angioplasty by conventional over-the-wire exchange technique. Twelve stenoses in 10 patients (six women and four men; age range 19 ± 7 years) with uncontrolled hypertension were treated by this method. The stenosis was caused by nonspecific aortoarteritis in 8 patients and fibromuscular dysplasia in 2 patients. It was ostial in seven and post-ostial in five vessels. Conventional exchange technique was unsuccessful in all of them. All procedures were done by femoral route. Technical success was seen in 11 (92 %), without complication. The stenosis improved from 90 ± 2.1 % (range 80–100 %) to 6 ± 7 % (range 0–20 %), blood pressure decreased from 198 ± 12.3 mm Hg (range 180–220 mm Hg)/130 ± 6.7 mm Hg (range 120–140 mm Hg) to 119 ± 5.7 mm Hg (range 110–130 mm Hg)/83 ± 3.9 mm Hg (range 80–90 mm Hg), and number of drug treatments for hypertension fell from 3.6 ± 0.52 (range 3–4) to 1 ± 0.94 (range 0–3; p 〈 0.01). Percutaneous transluminal renal angioplasty resulted in “cure” in 3 patients and “improvement” in 7 patients. Follow-up period was 3–21 months (mean 6.4 months). No restenosis was detected. Coaxial approach is safe and effective in treating difficult-to-cross lesions in which renal angioplasty by conventional exchange technique is unsuccessful.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003300050889
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  • 2
    Electronic Resource
    Electronic Resource
    MeV He+ ion induced delamination of diamond films (1998)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 72 (1998), S. 3014-3016 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report room temperature delamination of chemically vapor deposited diamond films on a Si substrate due to 1.5 MeV He+ ion bombardment. The delamination of films has been studied by scanning electron microscopy. The threshold fluence at which the delamination takes place has been determined in situ by monitoring the hydrogen signal with the help of elastic recoil detection analysis. Micro Raman measurements show the presence of residual stress (1.19 GPa) in the as-prepared films and its relaxation at the peripheri of the delaminated regions. It is proposed that enhancement of the residual stress during He+ ion bombardment leads to stress saturation conditions which result in the delamination of the brittle diamond films from the film/substrate interface. These findings lead to the possibility of creating ion-beam induced channels in diamond films for device isolation by suitable choice of film/substrate combination. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.121525
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  • 3
    Electronic Resource
    Electronic Resource
    Measurement of the AlGaInAs/AlGaAs conduction-band offset using ballistic electron emission spectroscopy (1998)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 73 (1998), S. 3271-3272 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Ballistic electron emission spectroscopy (BEES) has been used to determine the conduction-band offset between a 10-nm-thick Al0.12In0.22Ga0.66As (Q) strained layer and a ternary Al0.2Ga0.8As (T) barrier located beneath the surface. A three-sample process was used so that the known, reproducible Au/GaAs Schottky barrier would be the top layer of all measured structures. BEES thresholds obtained for Au/GaAs, Au/GaAs/Q, and Au/GaAs/Q/T were 0.96±0.02, 0.98±0.04, and 1.08±0.04 meV yielding offsets of ∼20 meV for GaAs/Q and ∼100 meV for Q/T. Under the affect of a high-temperature anneal, the Q/T offset was reduced to ∼40 meV. In addition, a structure employing solely Au/GaAs/AlGaAs was used to study transitivity for the Q/T material system. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.122741
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  • 4
    Electronic Resource
    Electronic Resource
    Staggered to straddling band lineups in InAs/Al(As, Sb) (1999)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 74 (1999), S. 1135-1137 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Ballistic electron emission spectroscopy (BEES) has been used to study both the conduction and valence band offsets between InAs and AlAsSb. With the addition of As to AlSb, the conduction band offset between it and InAs has been found to decrease despite the increase in the band gap. The resulting increase in the valence band causes the InAs/Al(As, Sb) band lineup to change from a staggered (type II) to a straddling (type I). Both room-temperature and low-temperature (77 K) BEES spectra have been taken to determine the band offsets. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.123466
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  • 5
    Electronic Resource
    Electronic Resource
    Fermi-level pinning position at the Au–InAs interface determined using ballistic electron emission microscopy (1997)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 70 (1997), S. 759-761 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Ballistic electron emission microscopy (BEEM) has been used to determine the Fermi-level pinning position at the Au/InAs interface. Using BEEM's three-terminal capabilities, collector current–voltage scans were taken on Au/InAs/AlSb samples. The extracted BEEM threshold values (1.22 eV) correspond to the highest energy band position in the conduction band at the InAs/AlSb interface. By subtracting the InAs/AlSb conduction-band offset (1.35 eV), an estimate of the Au Fermi-level position on InAs is obtained (0.13 eV). © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.118271
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  • 6
    Electronic Resource
    Electronic Resource
    Observation of misfit dislocations at the InxGa1−xAs/GaAs interface by ballistic-electron-emission microscopy (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 69 (1996), S. 940-942 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report ballistic-electron-emission microscopy (BEEM) imaging and spatially resolved spectroscopy of InxGa1−xAs/GaAs misfit dislocations 800 A(ring) below the surface. Majority-carrier scattering by a fraction of misfit dislocations was seen to locally reduce the BEEM current and to give logarithmic spatial dependence, which suggests charging of the dislocation cores. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.116950
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  • 7
    Electronic Resource
    Electronic Resource
    Safe pre-operative fasting times after milk or clear fluid in childrenA preliminary study using real-time ultrasound (1999)
    Oxford : Blackwell Science Ltd
    Anaesthesia 54 (1999), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Gastric emptying of orange-flavoured glucose (group I), low-fat milk (group II) and breast milk (group III) was evaluated in 45 ASA grade I children of ≤ 5 years of age by using real-time ultrasonography and residual gastric volume and pH was then measured. In 15 more children, residual gastric volume and pH was measured after a midnight fast (group IV). Mean (SD) gastric emptying time in group I was 1.53 (0.25) h (range 1.00–1.75), group II 2.32 (0.31) h (range 1.75–2.75) and group III 2.43 (0.27) h (range 2.00–2.75). According to Robert and Shirley's criteria, no children of group I and II were found to be ‘at risk’ at 2 h and 3 h, respectively, but 13.3% of group III children were labelled as ‘at risk’ at 3 h. The incidence of ‘at risk’ children in group IV was 33.3%. It was concluded that 3% fat milk or 17.5% glucose in a volume of 10 ml.kg−1 (maximum volume of 100 ml) can be given in children safely 3 h and 2 h, respectively, before anaesthesia. More real-time studies are required on breast milk to establish guidelines for its potential use as a pre-operative feed 3 h before anaesthesia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2044.1999.00660.x
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  • 8
    Electronic Resource
    Electronic Resource
    Characteristics of osteoarthritis among Kuwaitis: A hospital-based study (1998)
    Springer
    Clinical rheumatology 17 (1998), S. 210-213 
    Details
    ISSN: 1434-9949
    Keywords: Body mass index ; Kuwait ; Osteoarthritis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Sixty-nine Kuwaiti patients with osteoarthritis (OA) were studied. Primary knee OA was seen in 65 (94.2%) patients. The mean age of this group was 53.18 years with a range of 39–97 years. The female to male ratio was 2.82∶1. OA was bilateral in 84.62% and predominantly involved the medial tibiofemoral joint. According to Kellgren's grading of knee OA, grade 1 changes were present in 40.0%, grade 2 in 32.5%, grade 3 in 22.5% and grade 4 in 5.0%. Grade I obesity was seen in 13%, grade II in 64% and grade III in 23% of patients. Generalised primary nodular OA was seen in only four patients, all of whom were women. Primary OA of the hip joint and chondrocalcinosis were conspicuous by their absence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01451049
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  • 9
    Electronic Resource
    Electronic Resource
    On the formation of TiAl3 during reaction between solid Ti and liquid Al (1997)
    Springer
    Journal of materials science 16 (1997), S. 1175-1178 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Abstracts are not published in this journal
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018509026596
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  • 10
    Electronic Resource
    Electronic Resource
    Mossbauer spectroscopic study of heat-treated and control-cooled Fe3Al alloys (1998)
    Springer
    Journal of materials science 33 (1998), S. 109-116 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The Fe–Al system forms a model object of transition metal-sp element system. Fe–Al alloys containing 21–31 at% Al are known to exhibit several attractive physical properties which render them candidate materials for structural and magnetic applications. These magnetic and physical properties can be varied by altering the composition and the processing routes. Keeping this in mind, Mossbauer spectra of five Fe–24 at% Al and Fe–25 at% Al alloy samples processed via different routes have been studied. The analysis of the Mossbauer parameters, distribution of hyperfine magnetic fields, P(H) and H-values were used to identify various Fe-atom configurations (nearest neighbour or next nearest neighbour) associated with the phases formed by different processing routes. The results obtained from the present study indicate that the average hyperfine field 〈H〉 depends on the average rate of cooling followed during the precipitation of these phases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004349714166
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