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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 69 (1998), S. 2747-2756 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A capacitive-discharge spot welder is described which is primarily intended for making electrical connections between small (〈25–150 μm diameter) wires and samples of metallic materials, although it can be used in many applications where miniature welds must be made. It has been particularly useful in allowing low resistance (several mΩ) contacts to be created on samples of rare earth and actinide intermetallic compounds which are highly resistant to soldering. The device has a minimum time constant of about 25 μs and can deliver a maximum of between 700 μJ and 400 mJ of energy to the weld region, depending on the resistance of the latter. A suitable electrode holder is also described, and considerations for choosing the electrode materials, selecting the contact wires, preparing the sample, and creating a weld are discussed. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 130 (1994), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Summary A healthy 14-month-old boy had multiple, circular, scar-like depressions on both temples, which had been present since birth. Delivery had been normal, and had not required the use of forceps or other instruments. His mother and one sister had similar, but less obvious, lesions on the temples. The three affected family members had similar facial features, with laterally deficient eyebrows, and a prominent upper lip with down-turned mouth. Additional features in the baby were sparse lower eyelashes, medial epicanthal folds, and skin dimpling on one side of the chin.Focal facial dermal dysplasia (FFDD) denotes a condition in which there are bitemporal, round, scarlike lesions. It is inherited as an autosomal dominant trait with variable penetrance and expressivity, and there are no associated features. Setleis' syndrome is recessively inherited, and is characterized by similar bitemporal defects associated with other dysmorphic features, including deficient eyelashes and a prominent upper lip. This report of dominantly inherited bitemporal dermal defects with characteristic facies supports the idea that FFDD and Setleis' syndrome are a single disorder.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 131 (1994), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The cardio-facio-cutaneous (CFC) syndrome has several features in common with the Noonan syndrome, but is distinguished by the presence of hyperkeratotic skin lesions, abnormal hair, and a lack of familial cases. We describe a family who clearly satisfy the criteria for the CFC syndrome, and show other features which have been reported in the Noonan syndrome but not in the CFC syndrome, namely a haemorrhagic diathesis and ocular abnormalities. This supports the concept that the CFC syndrome is a manifestation of the Noonan syndrome.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 132 (1995), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Summary Human piebaldism is a rare autosomaal dominant disorder characterized by congenital depigmented patches of skin and hair. Piebaldism results from mutations of the kit proto-oncogene, which encodes a cell-surface receptor, tyrosine kinase, whose ligand is the stem/mast cell growth factor. We report four unrelated patients with piebaldism and consider the variations in phenotype in relation to the site of the kit gene mutation.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 130 (1994), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Summary Two unrelated children with von Recklinghausen's neurofibromatosis (NF1) had mothers with cutaneous NF1 lesions in a limited distribution. The cutaneous pattern in the mother of case 1 was clearly segmental, and probably represents mosaicism for the NF1 mutation which was passed on to the child. In the second case the distribution in the mother was less obviously segmental, but may still represent mosaicism. It is more difficult to diagnose mosaicism for NF1 in individuals with no affected offspring, or with more limited cutaneous manifestations. The difficulties in defining segmental NF and assigning a genetic risk are discussed.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 125 (1991), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Fatigue & fracture of engineering materials & structures 17 (1994), S. 0 
    ISSN: 1460-2695
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract— 21/4CrlMo steel and 11/4Cr1/2Mo steel have been widely been used for hydro-processing units such as hydro-desulphurising and hydro-cracking reactors. These reactor pressure vessel steels have a potential for temper embrittlement that leads to toughness degradation and a reduction of the critical flaw size for brittle fracture. These steels are also susceptible to hydrogen embrittlement, especially in aged steels where cracks may propagate in the base metal up to the critical flaw size. A vessel with adequate toughness when originally constructed may therefore embrittle during service and such changes may require pressure restrictions during start-up and shut-down.A survey of the literature shows composition to be the controlling parameter for both temper embrittlement (TE) and hydrogen embrittlement (HE), in-particular the presence of residual impurity elements such as P and the presence of elements such as Mo which nullify the effect of impurity segregation.Much information is available to describe embrittlement phenomena for Cr-Mo steels. This paper reviews the mechanisms of TE and HE and describes a microstructural characterisation route which subsequently allows the structural integrity of potentially embrittled vessels to be examined for the purposes of remaining life assessment and plant life extension.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Biotechnology letters 12 (1990), S. 149-154 
    ISSN: 1573-6776
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The ability of methanogenic bacteria to adapt to high concentrations of iron was investigated using a 9l Upflow Anaerobic Sludge Blanket (UASB) reactor fed semi-continuously with a synthetic waste containing glucose as the organic carbon source. It was found that an iron concentration of up to 5 650 mg/l, which is well in excess of previously reported toxicity levels, had no inhibitory effects on anaerobic digestion, with the exception of a decrease in biogas production. The iron precipitated out and accumulated in the sludge bed of the digester, resulting in very low concentrations of iron in the digester effluent.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1612-1112
    Keywords: Gas chromatography-IR spectroscopy ; Propanediol ; Acyclovir
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A simple procedure is described for the determination of the 1,2-propanediol (propylene glycol) content of cream formulations containing the antiviral drug Acyclovir. Analysis of a solvent extract by gas chromatography coupled to an infra-red spectrometer enables the target analyte to be positively identified and an estimate of its concentration to be made. This application utilises the newer Tracer cryogenic deposition interface for gas chromatography and infra-red spectroscopy. This offers an alternative and complementary analytical strategy to gas chromatography coupled to mass spectrometry.
    Type of Medium: Electronic Resource
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  • 10
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    Dordrecht : Periodicals Archive Online (PAO)
    Social Indicators Research. 29:3 (1993:July) 307 
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