ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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
  • 2
    ISSN: 1573-8892
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 26 (1970), S. 348-349 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung AusBlakeslea trispora wird eine neue Verbindung, Trisporol-C isoliert, ihre Struktur aufgeklärt und die Biosynthese der verwandten Trisporinsäuren ausβ-Carotin und retinal untersucht.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Helgoland marine research 20 (1970), S. 393-405 
    ISSN: 1438-3888
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Summary 1. A method has been developed for rearing large numbers of the larvae of the barnacleElminius modestus. At 20° C, frequent changing of the sea water medium treated with antibiotic allows 25 to 50% of the original larval population to settle and metamorphose to the adult stage. 2. The diatomSkeletonema costatum has been used as food source in a concentration of 5 × 105 cells/ml sea water. 3. The rearing temperature affects not only the rate of development but also the size of the larvae. 4. Constant illumination appears to provide optimum conditions for uniform rearing of larvae in large numbers. 5. Cyprids appear after approximately 7 days and settlement occurs about 3 days later. 6. In the laboratory, young adult barnacles will grow faster in flowing sea water than under static sea water conditions, even though supplementary food is added to the latter.
    Notes: Kurzfassung Es wird eine Methode beschrieben für die Massenzucht von Larven des CirripediersElminius modestus. Die produzierten Larven sind für Toxizitätstests und Verhaltensstudien vorgesehen. Populationen von 5000 bis 10 000 Nauplien werden in 4-Liter-Gefäßen bei konstanter Wassertemperatur erbrütet. Antibiotika und Diatomeen werden dem Seewasser (Kulturmedium), welches häufig erneuert wird, hinzugefügt. Die Entwicklung bis zum Cypris-Stadium dauert etwa 7 Tage; die Festheftung der Larven erfolgt 3 Tage später. Etwa 25 bis 50 % der Larven überlebt und metamorphosiert normal; die jungen Adulti wachsen unter Laboratoriumsbedingungen heran. Die kontinuierliche Kultureinheit, mit der große Mengen der DiatomeeSkeletonema costatum für Futterzwecke produziert werden, wird beschrieben. Es werden ferner Ergebnisse vorgelegt über die Larvalentwicklung mit besonderer Berücksichtigung von Überlebensrate, Größenzunahme und Entwicklungsgeschwindigkeit. Die Einfluüsse von Licht, Diatomeenart und Individuenkonzentration, Antibiotika, Ultraviolett-Sterilisation und Temperatur werden erörtert. Die Temperatur beeinflußt nicht nur die Überlebenschancen und die Entwicklungsgeschwindigkeiten, sondern auch die Größe der Larvenstadien: Larven, welche bei niedrigen Temperaturen gezüchtet werden, sind größer als die bei hohen Temperaturen gehaltenen. Die Lichtbedingungen beeinflussen offenbar die maximal möglichen Populationsdichten der Larven. Hohe Überlebensraten und gutes Wachstum junger Adulti wurden sowohl in stagnierendem als auch im fließenden Meerwasser erhalten. Die Versuchstiere wachsen jedoch in fließendem Meerwasser besser.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract The influence of Co- and Mn-salts of α-, β- and γ-pyridinecarboxylic acids, resp., on the oxidation of butylbenzene by air has been studied. It has been found that the Co salt of picolinic acid, Mn and Co isonicotinate direct the oxidation process in favour of carbonyl compounds and acids. With the Mn salt of picolinic acid, the oxidation mainly gives esters.
    Notes: Zusammenfassung Es wurde der Einfluß der Kobalt- und Mangansalze der α-, β- und γ-Pyridincarbonsäuren auf die Luftoxydation von Rutylbenzol in flüssiger Phase untersucht. Dabei wurde festgestellt, daß das Kobaltpicolinat, Manganisonicotinat und Kobaltisonicotinat den Oxydationsverlauf zur Bildung von Carbonylverbindungen und Säuren lenken. Das Manganpicolinat weist ein selektives Oxydationsvermögen auf, vorwiegend zur Bildung von Estern.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Russian physics journal 13 (1970), S. 1015-1019 
    ISSN: 1573-9228
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In a development of the hypothesis of quark regions within massive stars, it is shown that superconductivity may arise in these stars. An analysis is made of the properties of quark atoms.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Metal science and heat treatment 12 (1970), S. 772-773 
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Plant ecology 21 (1970), S. 375-397 
    ISSN: 1573-5052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary 1. Prosopis juliflora possesses not only growth inhibiting but also growth promoting principles. The influence of this has been demonstrated on the germination of the seeds ofEuphorbia caducifolia and their further growth. 2. The toxic effect was prominent in the concentrated aqueous extracts. Dilution of the extracts gave promoting effects. The best effect of growth enhancement was indicated by the stem and that of inhibition by the leaf; fruit extracts fell in between the two. 3. The inhibition of growth was more discernible on radicle than on the hypocotyl. The radicle in certain higher concentrations appeared truncated or tapered. The growth of root hairs was suppressed, thus retarding absorption and further development. 4. The aqueous extract from dried material after autoclaving lost their growth promoting influences. It also appeared that aqueous extracts from fresh material had more inhibitory substance or substances as compared to the dry autoclaved parts. 5. The presence of phytotoxic substance or substances could not be pinpointed as the only factor exerting a caustive influence on germination and growth of other plants in the neighbourhood ofProsopis juliflora. 6. The environmental conditions would not allow other plants to have the beneficial effects of stem. The fruits did not remain lying for a long time but are eaten away by animals. The leaves which fall down would dry up and would then be blown away. The presence of toxin, therefore, would become ineffectual as factors concerned in competition. 7. The two lots of seeds from two individual plants indicated variations in their response towards the same extract. This further confirmed the diversity concept proposed by the authors. 8. The response of seeds in laboratory conditions and in the soil in natural conditions varied. Thus a possible variation could be expected in the results with different plant species.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Experimental mechanics 10 (1970), S. 506-513 
    ISSN: 1741-2765
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Experiments were conducted to determine the effects of surface texture and normal load on the stiffness of joints formed by two machined surfaces. The experiments involved deformation measurements and examination of the contact surfaces of joints subjected to normal loads. It was shown that surface-displacement results can be affected by assuming that the compressive strain in the joint specimen is the same as in an equivalent solid piece. The elastic stiffness of joints were found to increase with an increase in the maximum nominal surface pressure. Results were also shown to illustrate that the elastic stiffness of a joint is affected by the loading history. Surface-profile measurements indicated that the topography of a joint surface changed with normal load, and that the deformation of a surface profile was related to the permanent change measured by extensometers placed across the joint interface.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Experimental mechanics 10 (1970), S. 506-513 
    ISSN: 1741-2765
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Experiments were conducted to determine the effects of surface texture and normal load on the stiffness of joints formed by two machined surfaces. The experiments involved deformation measurements and examination of the contact surfaces of joints subjected to normal loads. It was shown that surface-displacement results can be affected by assuming that the compressive strain in the joint specimen is the same as in an equivalent solid piece. The elastic stiffness of joints were found to increase with an increase in the maximum nominal surface pressure. Results were also shown to illustrate that the elastic stiffness of a joint is affected by the loading history. Surface-profile measurements indicated that the topography of a joint surface changed with normal load, and that the deformation of a surface profile was related to the permanent change measured by extensometers placed across the joint interface.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...