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  • 1
    Electronic Resource
    Electronic Resource
    Colorimetric Determination of Cobalt with Nitroso R Salt in Presence of Copper (1950)
    s.l. : American Chemical Society
    Analytical chemistry 22 (1950), S. 497-497 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac60039a037
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  • 2
    Electronic Resource
    Electronic Resource
    Ammonium Citrate in Colorimetric Determination of Copper (1948)
    s.l. : American Chemical Society
    Analytical chemistry 20 (1948), S. 776-777 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac60020a030
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  • 3
    Electronic Resource
    Electronic Resource
    Gypsum as a precursor to pyrrhotite in metamorphic rocks (1982)
    Springer
    Mineralium deposita 17 (1982), S. 401-409 
    Details
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract During low-grade regional metamorphism, pyrrhotite can form from gypsum by the reaction: CaSO4·2H2O+Fe sol. 2+ +2Corg.→FeS+Ca sol. 2+ +2H2O+2CO2. This reaction takes place in the anchizone, below ∼350°C and might be initiated by the thermal dehydration of gypsum (∼200°C) and aided by the generation of gaseous hydrocarbons. Evidence for the reaction is the occurrence in dolomitic layers in the Ballachulish Slate, East Larroch quarry, Argyll of lath and swallow-tail shaped quartz+dolomite+pyrrhotite pseudomorphs after gypsum. Quartz+pyrrhotite bodies in slate represent replaced and deformed (mainly flattened) crystals, concretions and possible veinlets of gypsum. Pyrite porphyroblast growth, after the peak of metamorphism and under relatively high fS2 conditions, failed to destroy some early pyrrhotite because it is encapsulated in quartz. Pyrite-silicate reactions and hydrothermal exhalations have been suggested previously to account for pyrrhotite-enriched horizons in regionally metamorphosed rocks. Replacement of gypsum by pyrrhotite is an additional explanation for pyrrhotite-enriched horizons, especially in dolomitic and graphitic lithologies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00204468
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  • 4
    Electronic Resource
    Electronic Resource
    Failures in Stressed Nylons (1962)
    [s.l.] : Nature Publishing Group
    Nature 195 (1962), S. 1092-1093 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Several nylon mouldings had been observed to crack and delaminate when in contact with electrolyte from discharged dry cells. Investigation of a number of possible causes of this cracking has shown that aqueous zinc chloride solutions, varying in concen tration from 20 to 80 per cent, are effective ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1951092a0
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  • 5
    Electronic Resource
    Electronic Resource
    REPRODUCIBILITY OF BIPARIETAL DIAMETER MEASUREMENTS OBTAINED WITH A REAL-TIME SCANNER (1980)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 87 (1980), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: In 80 patients, multiple measurements of the fetal biparietal diameter were made during one examination using a real-time scanner equipped with a coded cephalometer. From the sets of data, the means and standard deviations for the group of 80 patients were calculated. In 80 per cent of cases, the individual standard deviations of the results were less than or equal to the estimated standard deviation of the group as a whole. The variability of measurement related to biparietal diameter was least in the range 59 to 83 mm. Comparison of the results obtained with the coded device and others obtained ‘blind’ does not reveal any significant advantage for the coded device.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.1980.tb04580.x
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  • 6
    Electronic Resource
    Electronic Resource
    A COMPARISON OF BIPARIETAL DIAMETER MEASUREMENTS USING A REAL-TIME SCANNER AND A CONVENTIONAL SCANNER EQUIPPED WITH A CODED CEPHALOMETRY SYSTEM (1978)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 85 (1978), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: In 131 patients a comparison was made between measurements obtained using a real-time scanner and those obtained using a Conventional ‘B’ scanner with an attached ‘coded cephalometry system’: 69 per cent of the readings agreed within ±2 mm and, when the ‘B’ scan reading was considered ‘good’, 90 per cent fell within this range. Between 14 and 28 weeks, gestational age diagnoses using the two methods were within one week of each other in 88 of 89 patients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.1978.tb15619.x
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  • 7
    Electronic Resource
    Electronic Resource
    Far-red enrichment and photosynthetically active radiation level influence leaf senescence in field-grown sunflower (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 96 (1996), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Basal leaves frequently senesce before anthesis in high population density crops. This paper evaluates the hypothesis that quantitative and qualitative changes in the light environment associated with a high leaf area index (LAI) trigger leaf senescence in sunflower (Helianthus annuus L.) canopies. Mean leaf duration (LD, time from achievement of maximum leaf area) of leaf 8 was significantly (P 〈 0.05) reduced from 51 to 19 days as crop population density was increased from 0.47 to 4.76 plants m−2. High compared to low plant population density was associated with earlier reduction in the photosynthetically active radiation (PAR) and red/far-red ratio (R/FR) reaching the target leaf. However the changes in R/FR preceded those in PAR. When the light environment of individual leaves of isolated plants growing under field conditions was manipulated using filters and FR-reflecting mirrors, LD was positively and linearly related with the mean daily PAR (MDR) received in the FR- (no FR enrichment) treatments. FR enrichment of light reaching the abaxial surface of the leaf significantly (P 〈 0.05) reduced LD by 9 days at intermediate PAR levels with respect to FR-controls, but did not affect LD at the maximum PAR used in these experiments. However, when light reaching both leaf surfaces was enriched with FR, LD (for leaves receiving maximum PAR) was 13 days shorter than that of the FR- control. These results show that basal leaf senescence in sunflower is enhanced both by a decrease in PAR and by a decrease in R/FR.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1996.tb00205.x
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  • 8
    Electronic Resource
    Electronic Resource
    Submarine hot springs and the origin of life (1988)
    [s.l.] : Nature Publishing Group
    Nature 336 (1988), S. 117-117 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIRá€"Miller and Bada1 argue against the idea2 that hydrothermal vents at ocean-ridge crests would have provided suitable environments for life to originate. To their arguments one can add the lack of long-term stable microenvironments that would presumably have been needed for ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/336117a0
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  • 9
    Electronic Resource
    Electronic Resource
    Whisker crystals of the mineral ettringite (1991)
    Springer
    Mineralogy and petrology 43 (1991), S. 211-215 
    Details
    ISSN: 1438-1168
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01166892
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  • 10
    Electronic Resource
    Electronic Resource
    A continuum mechanics approach to determining the cellular velocity field within a wool follicle (1998)
    Springer
    Bulletin of mathematical biology 60 (1998), S. 79-100 
    Details
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract A model, based on the principles of continuum mechanics, is presented for the analysis of cell-velocity fields within wool follicles. The model requires specification of three follicle characteristics in the form of spatially varying fields: viscosity, cell density and cell production rate. The viscosity is introduced as an attempt to model both complex intercellular interactions and individual cell deformation as the cells move. It is demonstrated that the distribution of cell production is more important than axial variation in viscosity in determining the overall flow pattern.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1006/bulm.1997.0025
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