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  • 1
    Electronic Resource
    Electronic Resource
    ON THE DETERMINATION OF STEARIC ACID IN FATS. (1897)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 19 (1897), S. 32-51 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja02075a007
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  • 2
    Electronic Resource
    Electronic Resource
    Effects of seismic stress on the vegetative growth of Glycine max (L.) Merr. cv. Wells II (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 8 (1985), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract. Vegetative plants of soybean [Glycine max (L.) Merr. cv. Wells II] grown in a greenhouse and agitated periodically on a gyratory shaker had shorter stems, less leaf area, and lower leaf and plant dry weight than did undisturbed greenhouse-grown (GG) plants after 16 d of treatment. Outdoor-grown (OG) plants, which were subjected to additional environmental stresses including ultraviolet radiation, wind loading, and uncontrolled temperature and humidity fluctuations, were smaller and had less dry weight than GG controls, but growth was not inhibited further by gyratory shaking. Periodic shaking of GG soybeans resulted in the same plant and leaf dry weight as for OG soybeans. Response of GG plants to mechanical stress depended on light intensity, with minimum growth reduction occurring under full light (FL) level, and maximum growth reduction occurring under lower light levels (24–45% FL). Reduction in dry weight gain due to mechanical stress corresponded to a decrease in relative growth rate (RGR). Decreases in net assimilation rate and leaf area ratio contributed equally to the lower RGR of shaken plants, indicating that seismic stress inhibits dry weight accumulation by decreasing both the photosynthetic efficiency and the assimilatory surface of soybean.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1985.tb01221.x
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  • 3
    Electronic Resource
    Electronic Resource
    Respiratory symptoms in Queensland schoolchildren: an association between month of birth and respiratory illness (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Clinical & experimental allergy 21 (1991), S. 0 
    Details
    ISSN: 1365-2222
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: We have examined the relationship between month of birth and episodes of wheezing, productive cough, eczema and hayfever, and also standardized maximum midexpiratory flow (FEF25–75) in a representative sample of 4549 Australian primary schoolchildren (mean age 10.1 years). Children experiencing frequent wheezing (one or more episodes per month) were more likely to be born in spring and summer (odds ratio =1.6, 95% confidence interval = 1.1–2.4), but this was not seen for less severe disease. No effect of season or birth month was seen for the other illnesses examined or for lung function.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2222.1991.tb00835.x
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  • 4
    Electronic Resource
    Electronic Resource
    Surface roughness and wettability of enamel and dentine surfaces prepared with different dental burs (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: The aim of dental adhesive restorations is to produce a long lasting union between the restoration and the tooth structure. This bond depends on many variables including the geometry of the preparation and the type of bonding agent or luting cement. It is therefore suggested that the topography of the tooth surface may influence the wettability and the bonding quality of adhesive systems. This study measured the surface roughness and wettability of enamel and dentine after preparation with different dental burs. The mesial and distal surfaces of 15 extracted sound human premolar teeth were prepared with a tungsten carbide crown bur, a diamond bur and a tungsten carbide finishing bur and finished in enamel or dentin, respectively. The prepared surfaces were analysed with a surface profilometer and scanning electron microscopy (SEM). The contact angle of distilled water on each of the prepared surfaces was used as the measure of wettability. The differences in average surface roughness (Ra) were significant between the rotary instrument groups, as revealed by a two-way ANOVA test. No differences were detected between enamel and dentine surfaces prepared with the same type of dental bur. The smoothest surfaces were those completed with tungsten carbide finishing burs. The diamond bur preparations were intermediate in the roughness assessment and the tungsten carbide crown burs gave the roughest surfaces. There were no significant differences in the contact angle measurements for the various groups. It was concluded that the surface roughness of enamel and dentine prepared by different rotary instruments had no significant influence on the wettabilty of distilled water on these surfaces.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2842.2001.00722.x
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  • 5
    Electronic Resource
    Electronic Resource
    Stem hypoxia and root respiration of flooded maple and birch seedlings (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 60 (1984), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Some researchers have attributed flood tolerance of woody plants to air entering the shoot through stems, leaves, or lenticels and diffusing to the roots to sustain aerobie respiration. The purpose of this study was to determine if internal aeration of roots by lower stems, changes in gross morphology of lower stems, or both, contribute to flood tolerance of certain tree species. Greenhouse-grown seedlings of red maple (Acer rubrum L.) and river birch (Betula nigra L.) tolerated at least 30 days of flooding, where as sugar maple (Acer saccharum Marsh) and European white birch (also called silver birch, Betula pendula Roth) were intolerant. Flood treatment induced lentieel intumescences and adventitious root formation on red maple stems, but only adventitious roots formed on river birch stems. Stem morphology of sugar maple and European birch was unchanged by flooding. Flood stress decreased oxygen consumption capacity of excised roots from both tolerant and intolerant species. Exclusion of oxygen from the lower stems of flooded red maple and river birch prevented lenticel intumescence and adventitious root formation, but flood tolerance and root respiration capacity were unchanged. Neither internal aeration nor changes in stem morphology appear to account for flood tolerance of red maple and river birch.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1984.tb04929.x
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  • 6
    Electronic Resource
    Electronic Resource
    Environmental contaminants in redheads wintering in coastal Louisiana and Texas (1994)
    Springer
    Archives of environmental contamination and toxicology 26 (1994), S. 425-434 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract Whole body and liver analyses indicated that wintering redheads (Aythya americana; n=70) in coastal Louisiana (one site) and Texas (two sites) were relatively free of contamination with common trace elements, organochlorines, and hydrocarbons. Most trace elements, including As, Cr, Hg, Mg, Mn, Ni, Pb, Se, Sr, and Zn, were within background concentrations in livers; levels of B, Cd, Cu, and Fe were elevated in some specimens. Only one organochlorine, DDE, was detected in redhead carcasses, but its concentration was below reported toxic levels in waterfowl. Body burdens of aliphatic and aromatic hydrocarbons were generally low, but levels of pristane, total hydrocarbons, and the ratios of phytane:n-octadecane and pristane:n-heptadecane were indicative of possible chronic exposure to petroleum. Based on brain cholinesterase assays, redheads were not recently exposed to organophosphorous or carbamate pesticides. Of 30 elements or compounds tested for seasonal differences, only Se increased from early to late winter at one of the three sites. Eight of 57 contaminants differed among the three sites; no sex or age differences were found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00214143
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  • 7
    Electronic Resource
    Electronic Resource
    The estimation of primary aromatic amines and other basic nitrogen compounds in some coal liquefaction products (1986)
    Springer
    Chromatographia 21 (1986), S. 67-76 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography-mass spectrometry ; Coal liquefaction products ; Nitrogen bases ; Selective derivatisation ; Quantitative analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The estimation of primary aromatic amines (PAA) and other basic nitrogen compounds in coal liquefaction products is described. Aqueous acid extraction was used to isolate basic nitrogen fractions which were analyzed by gas chromatography (GC) and mass spectrometry (MS). Selective chemical derivatization in conjunction with single-ion GC-MS was used to distinguish between the PAA and the isomeric aza heterocycles. The relative merits of the proprietary methylating reagent ‘Methyl-8’ (dimethylformamide dimethylacetal) and a more conventional fluoroacylating reagent for the selective derivatization of PAA are evaluated. Quantitative aspects of the analyses are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02311678
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  • 8
    Electronic Resource
    Electronic Resource
    Luminescenzanalyse (1931)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 86 (1931), S. 394-396 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01398978
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  • 9
    Electronic Resource
    Electronic Resource
    Tinte- und Schriftuntersuchung (1933)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 95 (1933), S. 383-384 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01368736
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  • 10
    Electronic Resource
    Electronic Resource
    Mit dem Verhalten der Rasuren im ultravioletten Licht (1934)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 98 (1934), S. 384-384 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01331601
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