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  • Articles  (170)
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  • 1
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Chrysochromulina parva Lackey (type, and only known freshwater species, of the genus Chrysochromulina) has been detected in the plankton of Windermere and other lakes in the English Lake District. This is the first time that this species has been recognised outside the type locality (Scioto River, U.S.A., Lackey 1939). Observations on its behaviour in life, including seasonal and depth distributions, are recorded with the light microscope. Electron microscopy, mainly of material in culture, has added details of the fine structure. The combined results show (a) that the organism is abundant in several lakes at certain times of the year, though it had escaped detection earlier because of its extreme fragility, (b) that the cells are biflagellate, with a third filiform appendage which is a haptonema as in marine species and not a third flagellum, (c) that delicate plate-scales are sometimes detectable on the cell surface, (d) that the micro-anatomy of the main cell components is comparable to that of several marine species except for minor differences in the Golgi body and in the presence of a contractile vacuole. An emended taxonomic description is provided.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 42 (1962), S. 117-129 
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary In Windermere, and some other lakes in the English Lake District, the vernal increase of Asterionella formosa ceases when the concentration of silica in the water falls to approximately 0.5 mg/l. When this planktonic diatom is cultivated in water from one of these lakes, Windermere, the addition of small amounts of phosphate phosphorus permits the growth of so large a crop that all the silica present is incorporated into the cells. The intensity and duration of the illumination and the temperature of the water effect this relationship between silica, phosphorus and the growth Asterionella. Therefore, the regular, observed relationship between the concentration of silica and the vernal maximum of Asterionella in nature may be related to the amount of this substance in the water, to the amount of phosphate phosphorus present and to the rate of growth imposed upon this diatom by the light and temperature conditions in the lake during the period concerned. The possible importance of the relatively low concentration of phosphate phosphorus in certain very unproductive lakes is discussed.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 41 (1991), S. 351-354 
    ISSN: 1432-1041
    Keywords: Paroxetine ; Cirrhosis ; pharmacokinetics ; multiple-dose study ; adverse effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary In a 14-day multiple-dose study the pharmacokinetics of paroxetine was investigated in 12 patients with alcoholic cirrhosis and in 6 subjects without liver disease. The dose of 20–30 mg paroxetine daily was adjusted to the reduction in liver function, as assessed by the galactose elimination capacity. Accordingly, all but two of the cirrhotic patients received 20 mg, while all six control subjects received 30 mg. Dose-corrected, trough drug concentration at steady state (CSS min) and dose-corrected AUC24h were significantly higher in the patients with liver diseases than in the control subjects [3.4 vs 1.5 ng · ml−1 per mg paroxetine and 89 vs 43 h (ng) · ml−1 per mg paroxetine]. The elimination t1/2 was prolonged [83 vs 36 h], but the difference was not statistically significant, and the cirrhotic patients were still able to clear almost all the paroxetine by metabolism. All but two patients with cirrhosis experienced nausea during the first two or three days after the first dose, while none of the controls had this symptom. The study showed slower elimination of paroxetine and consequently higher plasma levels in patients with cirrhosis, suggesting that in the latter the dose of paroxetine should be in the lower end of the therapeutic range.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Numerische Mathematik 59 (1991), S. 361-383 
    ISSN: 0945-3245
    Keywords: 65M30
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Summary This paper considers a discrete sampling scheme for the approximate recovery of initial data for one dimensional parabolic initial boundary value problems on a bounded interval. To obtain a given approximate, data is sampled at a single time and at a finite number of spatial points. The significance of this inversion scheme is the ability to accurately predict the error in approximation subject to choice of sample time and spatial sensor locations. The method is based on a discrete analogy of the continuous orthogonality for Sturm-Liouville systems. This property, which is of independent mathematical interest, is the notion of discrete orthogonal systems, which loosely speaking provides an exact (or approximate) Gauss-type quadrature for the continuous biorthogonality conditions.
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Ecology of freshwater fish 7 (1998), S. 0 
    ISSN: 1600-0633
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract— Fry of the Arctic charr, Salvelinus alpinus, were experimentally stocked into a small fish-free lake to test the hypothesis that the size-dependent habitat shift from the epibenthic to the pelagic habitat is genetically determined. The charr originated from a nearby lake inhabiting predatory brown trout Salmo trutta. The cohort of stocked charr was investigated for three years. The Arctic charr started to exploit the pelagic habitat in their first summer at a size of 7–9 cm in contrast to about 15 cm in the donor lake. In the next two summers, the pelagic fraction of the cohort increased. The main fraction lived in epibenthic areas, utilizing the same prey as pelagic charr. Water temperature moderated the habitat use of juveniles such that they avoided warm (〉16°C) waters and resided in cool, deep areas. The result was consistent with the hypothesis of a tradeoff between feeding benefit and the predation risk producing spatial segregation of Arctic charr and demonstrated that the fish can facultatively respond to predation risk and adjust the size at which they migrate to the pelagic zone to feed on zooplankton.
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 165 (1950), S. 454-454 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In Great Britain, at least, there are few men of science with a deep knowledge of Latin. Commonly, assistance has to be obtained in making Latin diagnoses or, what is worse, someone other than the author translates them. The translator may well neither be an algologist nor even a botanist. Even ...
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 0003-9861
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Sensors and Actuators B: Chemical 1 (1990), S. 267-271 
    ISSN: 0925-4005
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 0003-2697
    Keywords: 2,3,7,8-tetrachlorodibenzo-p-dioxin ; 3-methylcholanthrene ; TCDD receptor ; cytochrome P-450 ; hydroxylapatite ; polycyclic aromatic hydrocarbons
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Analytica Chimica Acta 99 (1978), S. 189-192 
    ISSN: 0003-2670
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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