Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Background correction in atomic absorption utilizing the Zeeman effect (1980)
    s.l. : American Chemical Society
    Analytical chemistry 52 (1980), S. 741-746 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac50054a033
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Nutrition studies in the nauplius larva of Calanus pacificus (Copepoda: Calanoida) (1979)
    Springer
    Marine biology 53 (1979), S. 131-147 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Nauplii of Calanus pacificus were raised on a mixture of algae. Details of the mouth-parts, such as denticles, labial palps and lobes, setations and structure of the masticatory teeth were examined by scanning electron microscopy (SEM). Under the experimental conditions (15°C and 300 μgC l-1), exponential growth coefficients for the period Nauplii II–VI were 0.179 for carbon and 0.228 for nitrogen. C:N ratios dropping from 5.1 to 4.7. Growth was isochronous, each stage lasting 1.5 days. Respiratory losses were 15 to 19.6% of body carbon daily. Nauplii raised on a given alga showed higher rates of ingestion in the presence of this food, compared to nauplii switched to other algae. Minimal threshold concentrations for feeding were found, depending on the size of the food offered and ranging from 5.8 μgC I-1 for Lauderia borealis (28.7 μm spherical diameter) to 47.1 μgC 1-1 for Chlamydomonas sp. (11.0 μm). Unlike the Copepodite I stage, Nauplii II–VI larvae were not able to ingest small cells such as Isochrysis galbana (4.3 μm), or very large ones such as Ditylum brightwellii (47.5 μm) at more than maintenance rations. Below the critical concentration for maximal feeding, ingestion was clearly dependent on size of the cells offered, but the size-dependent relationship was different for diatoms and non-diatoms. Filtering rates increased from a threshold concentration to a maximal rate at about 50 μgC 1-1, and decreased at higher concentrations. Critical concentrations ranged from 125 μgC 1-1 for L. borealis to 1000 μgC 1-1 for Chlamydomonas sp. Maximal daily rations ranged between 100 and 150% of body carbon.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00389185
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Defining the validity of a biochemical index of soil quality (1999)
    Springer
    Biology and fertility of soils 30 (1999), S. 140-146 
    Details
    ISSN: 1432-0789
    Keywords: Key words Soil quality indicators ; Soil biochemical properties ; Soil degradation ; Soil pollution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract  The native soils of Galicia (NW Spain) exhibit a biochemical equilibrium such that total soil N is a function of five biochemical and microbiological parameters: microbial biomass C, mineralized N, phosphomonoesterase, β-glucosidase and urease activities. To investigate whether the ratio of the total N calculated from biochemical soil properties (Nc) and the total N as measured by the Kjeldahl method (Nk; Nc/Nk) can be used as an index of soil quality, we determined these variables and consequently the ratio in three kinds of disturbed soils: an artificially Cu-contaminated soil, two lignite mine soils, and a number of arable soils. In none of the studied soils did the individual biochemical parameters respond consistently to the factors influencing soil quality, but in all cases soil degradation was reflected by the Nc/Nk value, which differed more or less markedly from 100%. Nc/Nk can therefore be used for the rapid evaluation of soil degradation, since it distinguishes among biochemically balanced soils, soils in a transient state of high microbiological and biochemical activity and degraded soils. It can also serve as a reliable basis for the rapid calculation of the "ecological dose" (ED50) of soil pollutants. The use of Nc/Nk as an objective index of the biochemical quality of soils is recommended.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003740050600
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Photolimitation and photoinhibition as factors determining optimal dilution rate to produce eicosapentaenoic acid from cultures of the microalga Isochrysis galbana (1998)
    Springer
    Applied microbiology and biotechnology 50 (1998), S. 199-205 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Eicosapentaenoic acid (EPA) productivity from continuous cultures of the marine microalga Isochrysis galbana was studied, taking into account the irradiance on the reactor surface, that is, the photolimitation/photoinhibition regime to which the cells are exposed. Experiments were conducted under a wide variety of operating conditions. The dilution rate ranged from 0.005 h−1 to 0.040 h−1 at five external irradiances (820, 1620, 2050, 2450 and 3270 μmol photons m−2 s−1) covering photolimited to photoinhibited growth. Under these conditions, the specific growth rate (μ) was found to be the main factor influencing EPA content (ranging from 2.35% to 5.23% dryweight) and productivity (up to 0.88 mg l−1 h−1). The fatty acid content was not significantly affected by the external irradiance, but was influenced by the state of growth of the microalga, depending on whether the light regime was photolimiting or photoinhibiting. It might be suggested that light should no longer be considered an isolated factor affecting EPA synthesis, but an indirect influence through the photolimitation/photoinhibition regime and growth rate. At a given dilution rate, EPA content and biomass concentration are lower under photoinhibiting external irradiances than those corresponding to photolimiting conditions, and consequently EPA productivity decays. Since the effect of photoinhibition is less marked at high biomass concentration, a strategy to optimize EPA productivity from microalgal cultures could consist of reducing the dilution rate when the external irradiance increases above the phoinhibition threshold.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002530051277
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Anthropometric measurements in patients with growth hormone deficiency before treatment with human growth hormone (1980)
    Springer
    European journal of pediatrics 133 (1980), S. 277-282 
    Details
    ISSN: 1432-1076
    Keywords: Growth hormone deficiency ; Hypopituitarism ; Craniopharyngioma ; Body proportions ; Head shape ; Skinfold thickness
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In 74 children (52 ♂, 22 ♀) with growth hormone (GH) deficiency (30 cases with isolated GH-deficiency, two of them familial; 4 familial and one isolated case with tendency for formation of antibodies against hGH; 29 with other pituitary hormone defects; 10 craniopharyngiomas), various anthropometric measurements were analyzed before treatment with hGH. In all groups, standing height, sitting height, and subischial leg height were equally retarded, and bihumeral width was more retarded than biilac width; the head was relatively large; fat tissue was increased with subscapular skinfolds being greater than triceps skinfolds, indicating relative obesity of the trunk; muscle and/or bone mass was reduced. In isolated GH-deficiency, head shape was slightly scaphoid; in combined defects, it was round, and in craniopharyngioma cases, it was brachycephalic. It is concluded that anthropometric measurements may help in differentiating the type of GH-deficiency.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00496089
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Longitudinal anthropometric measurements in patients with growth hormone deficiency. Effect of human growth hormone treatment (1982)
    Springer
    European journal of pediatrics 138 (1982), S. 38-45 
    Details
    ISSN: 1432-1076
    Keywords: Growth hormone deficiency ; Hypopituitarism ; Craniopharyngioma ; Body proportions ; Head shape ; Skinfold thickness ; hGH treatment ; Bone maturation ; Growth velocity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The effect of human growth hormone (6IU/m2 twice weekly i.m.) on standing, sitting, and subischial leg height, on arm length, head circumference, fronto-occipital and biparietal head diameter, bi-iliac (pelvis) and bihumeral (shoulder) width, body weight, triceps and subscapular skinfold thickness, and upper arm and calf circumferences was studied longitudinally over a period of 2 years in 37 prepubertal growth hormone deficient patients (29 boys, 8 girls). Thirteen of them had isolated growth hormone deficiency, 18 combined defects with other anterior pituitary hormone deficiencies, and 6 had been operated for a craniopharyngioma. The most retarded height and length measurements were influenced most markedly by treatment in the fashion of a characteristic catch-up growth, while head circumference, which was less retarded initially, increased more slowly. With exception of craniopharyngioma patients, who became slightly eunuchoid, body proportions (sitting height versus subischial leg height) were not changed by treatment. The disproportions of shoulder and hip width (relatively wide pelvis, narrow shoulders before treatment) tended to be normalized. The results in patients with operated craniopharyngioma were not as good as in those with idiopathic growth hormone deficiency.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00442326
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Accurate closed-form approximations to partition functions (1991)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 95 (1991), S. 4721-4722 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We develop a method for obtaining accurate closed-form approximations to partition functions for all values of the temperature. The method is based on an alternative application of the Euler–Maclaurin summation formula and is therefore restricted to those partition functions which can be treated by such an approach. As an illustrative example we discuss the rigid rotor and show analytic expressions for the partition functions obtained by summing over all states, even states, and odd states.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.461744
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Allergic contact dermatitis from colour developers: absence of cross-sensitivity to para-ammo compounds (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Contact dermatitis 30 (1994), S. 0 
    Details
    ISSN: 1600-0536
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0536.1994.tb00605.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Occupational allergic contact dermatitis from sunflower (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Contact dermatitis 35 (1996), S. 0 
    Details
    ISSN: 1600-0536
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0536.1996.tb02352.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Delayed allergic reactions to amoxycillin and clindamycin (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Contact dermatitis 35 (1996), S. 0 
    Details
    ISSN: 1600-0536
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0536.1996.tb02312.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...