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
    Flame Spectrophotometry of Calcium with Reversed Oxyacetylene Flame. Application to Serum and Urine. (1963)
    s.l. : American Chemical Society
    Analytical chemistry 35 (1963), S. 875-880 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac60200a033
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Scientific basis for the role of the oceans as a waste disposal option - North Atlantic Treaty Organization Advanced Research Workshop, Vilamoura, April 1985
    Amsterdam : Elsevier
    Marine Policy 10 (1986), S. 68-69 
    Details
    ISSN: 0308-597X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Political Science , Law
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0308-597X(86)90037-0
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Accumulation, release and retention of petroleum hydrocarbons by the oyster Crassostrea virginica (1973)
    Springer
    Marine biology 22 (1973), S. 37-44 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two Crassostrea virginica populations, differing in fat content, were experimentally exposed to a complex petroleum-hydrocarbon fraction. The hydrocarbons in this mixture were accumulated by both groups of oysters, and their lipid content, as well as the concentration of hydrocarbon in the water, were found to affect the rate and extent of accumulation. Hydrocarbons accumulated were rapidly, although incompletely, discharged when the oysters were transferred to an uncontaminated system. Amounts of hydrocarbons discharged and amounts retained after discharge are probably related to the level of contamination. The data can be interpreted as indicating that equilibration and the occurrence of multiple compartments where hydrocarbons can reside are factors involved in the uptake and retention of nonbiogenic hydrocarbons by oysters. The petroleum hydrocarbons contained in the oysters differed from the contaminating oil by displaying a greater aromatic content. In addition, gas-liquid chromatograms of aliphatic fractions of the hydrocarbons in the oysters rapidly showed a degraded appearance; the possibility that the oysters themselves are modifying the oil cannot be excluded.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00388908
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Mode of action of glycolic acid on human stratum corneum: ultrastructural and functional evaluation of the epidermal barrier (1997)
    Springer
    Archives of dermatological research 289 (1997), S. 404-409 
    Details
    ISSN: 1432-069X
    Keywords: Key words Alpha hydroxy acid ; Epidermal barrier ; Stratum corneum ; Lipid structures ; Desmosomes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Alpha-hydroxy acids (AHA) such as glycolic acid have recently been used extensively in cosmetic and dermatological formulas. In low concentration (2– 5%) glycolic acid is believed to facilitate progressive weakening of cohesion of the intercellular material of the stratum corneum (SC), resulting in uniform exfoliation of its outermost layers (the stratum disjunctum). Since thinning of the SC as well as changes of intercellular lipids could theoretically compromise the barrier functions of the skin, we investigated the mode of AHA action on the SC to determine whether enhanced desquamation compromises the barrier structures of the SC and changes transepidermal water loss (TEWL) values. Electron microscopy of the epidermis biopsied from the volar forearm of human volunteers after 3 weeks of treatment with a 4% glycolic acid formulation twice daily was employed to evaluate 1) epidermal morphology and thickness of the SC, (2) the lamellar body and SC lipid bilayer organization, and (3) desquamative events based on degradation of desmosomes. TEWL values and SC hydration were recorded prior to and at the end of the study. Electron microscopy revealed no ultrastructural changes in the nucleated layers of the epidermis. The lamellar body (LB) secretory system in the stratum granulosum (SG), and intercellular lipid lamellae in the SC in both vehicle- and glycolic acid-treated samples were comparable to normal human SC. Within the SC, enhanced desmosomal breakdown, promoting loss of cohesion and desquamation, was restricted to the stratum disjunctum while desmosomes of the stratum compactum were unaffected. Treated areas displayed histologically, a more compact appearing SC. TEWL values remained unchanged in glycolic acid- and vehicle-treated skin. Our findings indicate that the barrier structures of the SC are not disrupted by glycolic acid formulations at the concentration used. One of the mechanism of action of AHA on the SC seemed to be a „targeted“ desmosomal (corneosomal) action without compromising the barrier structures of the skin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004030050212
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Alkane-induced edema formation and cutaneous barrier dysfunction (1988)
    Springer
    Archives of dermatological research 280 (1988), S. 375-379 
    Details
    ISSN: 1432-069X
    Keywords: Alkanes ; Irritation ; Edema ; Cutaneous permeability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Certain mineral oils and hydrocarbons require repeated topical application to cause irritation. A structure activity relationship of pure n-alkanes was undertaken in a mouse ear edema model to investigate the mechanism of cumulative irritancy. Alkanes were applied twice daily over a 4-day period. Dodecane was found to be non-irritating, while tridecane elicited a response only at 96 h. Tetradecane was the strongest irritant with significant increases (p〈0.05) in ear thickness observed at 48 h. Hexadecane, octadecane, and eicosane exhibited progressively decreasing activity. Permeability of the ears to hydrocortisone was monitored in vitro during tridecane-and tetradecane-induced irritation. Significant increases in permeability were observed 24 h before edema formation. A positive correlation was found between the extent of edema formation and enhancement of permeability. Loss of barrier function would result in increased cutaneous availability of the alkanes. Increased permeability prior to edema formation indicates that induction of barrier dysfunction may be a factor in the mechanism of alkane-induced irritation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00426617
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Streaming hypointensity in hemorrhagic glioblastoma multiforme (1990)
    Springer
    Neuroradiology 32 (1990), S. 241-243 
    Details
    ISSN: 1432-1920
    Keywords: Glioblastoma multiforme ; Multifocal hemorrhage ; Computed tomography ; Magnetic resonance ; Angiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The computed tomography, the magnetic resonance and the angiographic features of a patient with the unusual findings of multicentric intraparenchymal, subependymal and intraventricular hemorrhage in association with glioblastoma multiforme are presented. The utility of MR in demonstrating an irregular, streaming pattern of hypointensity within the lesion (and thereby suggesting an underlying neoplasm) is briefly discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00589121
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Brain and meningeal infections in children (1973)
    Springer
    Neuroradiology 6 (1973), S. 8-16 
    Details
    ISSN: 1432-1920
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Les auteurs décrivent les modifications observées sur le cerveau et les méninges en cas d'infections. Dans la plupart des cas, les modifications notées ne sont pas spécifiques. Les auteurs insistent sur la valeur du Scanning dans le cas d'un abcès cérébral chez un enfant.
    Abstract: Zusammenfassung In der vorliegenden Arbeit werden die röntgenologischen Veränderungen beschrieben, die bei Infektionen des Gehirns und der Meningen beobachtet werden. In der Mehrzahl der Fälle sind diese Veränderungen nicht spezifisch. Der Wert der Hirnszintigraphie bei Hirnabszessen wird betont.
    Notes: Summary The radiological changes found with infections of the brain and meninges are described. In most cases, the changes seen are not specific. — The value of the brain scan in demonstrating an abscess of the brain in a child is stressed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00338852
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Calcifying cerebral cavernous hemangioma with brain scan and angiographic findings (1974)
    Springer
    Neuroradiology 7 (1974), S. 133-138 
    Details
    ISSN: 1432-1920
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Les auterus rapportent un cas d'hémangiome caverneux du lobe cérébral frontal droit. La lésion comprenait une miriade de discrètes petites calcifications, associées à une hyperfixation bien délimitée lors du scintigramme cérébral au technecium et confirmées par l'angiographie cérébrale. Depuis l'excérèse de l'hémangiome, le malade se porte bien.
    Abstract: Zusammenfassung Fallbeschreibung eines Patienten mit einem cavernösen Hämangiom im Stirnhirn-Bereich rechts. Die radiologischen Zeichen werden besprochen.
    Notes: Summary A case of a cavernous hemangioma of the right frontal lobe of the brain is reported. The lesion showed a myriad of tiny discrete calcifications and was associated with a well-circumscribed uptake on technetium brain scan and positive findings on cerebral angiography. The patient has done well since excision of the hemangioma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00344318
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Oxygen loss from Spartina alterniflora and its relationship to salt marsh oxygen balance (1994)
    Springer
    Oecologia 97 (1994), S. 431-438 
    Details
    ISSN: 1432-1939
    Keywords: Gas transport ; Salt marsh ; Spartina alterniflora ; Rhizosphere
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Spartina alterniflora has been reported to lose significant amounts of oxygen to its rhizosphere with potentially important effects on salt-marsh biogeochemical cycling and plant productivity. The potential significance of this oxidative pathway was evaluated using laboratory split-chamber experiments to quantify oxygen loss from intact root systems under a wide variety of pre-treatment and incubation conditions including antibiotics to inhibit microbial respiration. The aerenchyma system of S. alterniflora was found to transport O2, N2, Ar, and CH4 from above-ground sources to its below-ground roots and rhizomes. While non-respiratory gases were observed to move from the lacunae to water bathing the root systems, net O2 loss did not occur; instead oxygen present outside of the roots/rhizomes was consumed. Net oxygen loss was found when resistance to gas transport was reduced in the lacunae-rhizosphere pathway by placing the root systems in a gas phase and when plant respiration was significantly reduced. Root system respiration appeared to be the major variable in the plant oxygen balance. When root and rhizome respiration was inhibited using poisons or lowered by cooling, the oxygen deficit was greatly reduced and oxygen loss was indicated. The effect of seasonal temperature changes on root system “oxygen deficit” presents a possible explanation as to why Spartina produces root systems with respiration rates that cannot be supported by gas transport. Overall, while oxygen loss from individual plant roots is likely, integrating measured root system oxygen loss with geochemical data indicates that the mass amount of oxygen lost from S. alterniflora root systems is small compared to the total oxygen balance of vegetated salt marsh sediments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00325879
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    In situ respiration of benthic communities in Castle Harbor, Bermuda (1972)
    Springer
    Marine biology 12 (1972), S. 196-199 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In situ measurements of community respiration were made at two stations in Castle Harbor, Bermuda, during April and May, 1971. Total community respiration was 20.67 and 19.11 ml O2 m-2 h-1 at Stations 1 and 2, respectively, in April. In May, respiration increased with water temperature to 26.99 and 24.56 ml O2 m-2 h-1. Significant differences (P〈0.05) existed between stations and sampling periods. Bacterial respiration was estimated from sediment treatment with streptomycin-SO4. Values ranged from 7.71 to 8.72 ml O2 m-2 h-1 in April and May, respectively. No significant difference existed between sampling periods or stations. No detectable chemical O2 demand of the sediment, determined by a formalin treatment, was found. Total community respiration was further compartmentalized into macrofaunal, meiofaunal, and microfaunal-microfloral components. Both the macrofaunal and meiofaunal respiration was negligible compared to that estimated for the microfaunal-microfloral component.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00346766
    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...