Library

You have 0 saved results.
Mark results and click the "Add To Watchlist" link in order to add them to this list.
feed icon rss

Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
Filter
  • 1965-1969  (13)
  • 1890-1899  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Psychophysiology 4 (1968), S. 0 
    ISSN: 1469-8986
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: Alpha waves in the EEG occur with a time delay in the anteroposterior direction. The hypothesis that this time delay is associated with level of arousal was tested. Alpha time delay was determined from covariance functions and level of arousal from palmar skin conductance levels. The results support the hypothesis.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of regional science 9 (1969), S. 0 
    ISSN: 1467-9787
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 208 (1965), S. 681-682 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Experimentally, however, little evidence has been accumulated which substantiates the occurrence of relaxation effects in electrophoresis. von Stackelberg et al.5 examined the mobility of some emulsion droplets in the xa range 10-2,000 and obtained qualitative evidence for relaxation. An indirect ...
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 50 (1894), S. 499-499 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Is Barrhead, Renfrewshire, on Friday (14th), at 9.15 p.m., I witnessed the finest aurora I have observed for years. The luminous arch extended from south-west to north-east, and shortly reached the zenith. The rapid fluctuations in the streamers were remarkable. There were no coloured bands. ...
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 50 (1894), S. 297-297 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] REFERRING to “Delta's” note, I may say that in the fine weather which we had here in April, the small tortoise-shell butterfly appeared more numerously than ever I had witnessed it at that season, or indeed at any time. I recollect counting a dozen at one time on a small bush of Andromeda ...
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 51 (1894), S. 107-107 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] STEPPING out of doors to-night, November 23, at 7.30, I was surprised to see the whole northern sky filled with luminous mist, so clear that our shadows were dimly observed on the shining surface of the wet highway. There were few tremulous motions, but the light clouds advanced southwards in ...
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 215 (1967), S. 161-166 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Die Methoden zur Präparation monodisperser Polystyrol-Latices werden beschrieben, wobei als Initiator Wasserstoffsuperoxid und als Emulgator Natriumdodecanoat, Natriumdodecyl-Hydrogenphosphat und Dodecylamin-Hydrochlorid Verwendung fanden. Die erhaltenen Latices haben einen kleinen Koeffizienten der Variation des Teilchen-Durchmessers, bestimmt mit Elektronenmikroskopie. Die Partikelgröße schwankte innerhalb 500–5000 Å. Die Teilchen-Durchmesser aus höheren Ordnungen des Tyndall-Spektrums stehen in vernünftigerÜbereinstimmung mit denen aus elektronenmikroskopischen Untersuchungen. Die Bestimmung der Oberflächengröße eines Latex durch Krypton-Adsorption gab eine Oberfläche ebenfalls in guter Übereinstimmung mit der elektronenmikroskopischen Beobachtung.
    Notes: Summary A description is given of the methods used for the preparation of monodisperse polystyrene latices using hydrogen peroxide as an initiator and sodium dodecanoate, sodium dodecyl hydrogen phosphate and dodecylamine hydrochloride as surface active agents for the emulsification of styrene. The latices prepared had a small coefficient of variation on particle diameter as measured by electron microscopy. The range of particle sizes investigated was from 500–5000 Å. The diameters of the particles determined, where possible, from Higher Order Tyndall Spectra were in reasonable agreement with those determined by electron microscopy. Determination of the surface area of one latex by krypton adsorption gave a surface area in close agreement with that obtained from electron microscope observations.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 218 (1967), S. 34-40 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Es wurde versucht, Polystyrol-Latices, die durch Emulsionspolymerisation dargestellt worden waren, durch Elektrophorese zu charakterisieren. Als Emulsionsmittel wurden Dodecansäure, Dodecylamin, Dodecylphosphorsäure und Salzsäure, als Initiatoren Wasserstoffperoxid und Kaliumperoxiddisulfat verwandt. Wenn durch einmalige Dialyse die bei der Polymerisation gebildeten Oxydationsprodukte entfernt werden, zeigt die Beweglichkeit in Abhängigkeit vom pH-Wert Bereiche, die für die adsorbierten oberflächenaktiven Agentien charakteristisch sind. Nach intensiver Dialyse verschwinden diese Bereiche, und die Kurven nehmen die für Carbonsäuren mit einem Oberflächen-pK-Wert von 4,64 charakteristische Gestalt an. Die Versuche weisen darauf hin, da\ die Carboxylgruppen ein Bestandteil des Polymeren sind. Eine Bestätigung hierfür ergab sich aus der Darstellung einer Polystyroldispersion durch Suspensionspolymerisation bei völliger Abwesenheit grenzflächenaktiver Verbindungen. Diese Dispersion zeigt einen ähnlichen Zusammenhang zwischen Beweglichkeit und pH-Wert wie die ausgiebig dialysierten Latices. In einer detaillierten Diskussion wird die Frage behandelt, wie pK-Werte aus elektrokinetischen Daten ermittelt werden können.
    Notes: Summary A series of polystyrene latices prepared by emulsion polymerisation have been characterised by electrophoresis. Dodecanoic acid, dodecylamine hydrochloride and dodecylphosphoric acid were used as emulsifying agents and hydrogen peroxide and potassium persulphate as initiators. After a preliminary dialysis to remove oxidation products formed in the polymerisation the mobility against pH curves showed regions which were characteristic of the adsorbed surface active agent. After extensive dialysis these regions were no longer present and the curves were characteristic of a carboxylic acid with a surface pK of 4.64. The experiments indicated that the carboxyl groups were an integral part of the polymer. This was confirmed by the preparation, using suspension polymerisation, of a dispersion of polystyrene particles in the complete absence of surface active agent. For this material the mobility — pH behaviour was very similar to that of the extensively dialysed latices. A detailed discussion is given of the problem of obtaining pK values from electrokinetic data.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Calcified tissue international 2 (1968), S. 286-295 
    ISSN: 1432-0827
    Keywords: Growth ; Skull ; Face ; Cranial sutures ; Vital staining
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Description / Table of Contents: Résumé Les auteurs ont injecté à de jeunes lapins blancs de Nouvelle-Zélande, mâles, des doses variables de: Rouge Alizarine S, bleu Trypan, Chlortetracycline ou Ca45. Ils ont étudié l'influence de ces différents facteurs sur la croissance osseuse à l'échelle microscopique, en comparaison avec les résultats fournis par la méthode utilisant des colorants vitaux à base d'acétate de plomb. Le45Ca s'est revelé sans effect. Par contre les autres substances entraînent une inhibition temporaire de la croissance; celle-ci est la plus marquée après administration de Rouge Alizarine S et minimum avec la Chlortetracycline; elle est d'autant plus nette que la dose administrée est plus forte. A la dose de 100 mg/kg le Rouge Alizarine S réduit seulement la croissance osseuse; celle-ci est stoppée par une dose de 150 mg/kg. De même une dose de 50 mg/kg de Chlortetracycline ou de 100 mg/kg de Bleu Trypan ralentit la croissance osseuse; une dose de 350 mg/kg de Bleu Trypan bloque toute activité ostéogénique. L'effet de la Chlortetracycline est très transitoire, celui des autres substances moins rapidement reversible.
    Abstract: Zusammenfassung Verschiedene Dosen von Alizarinrot S, Trypanblau, Chlortetracyclin und45Ca wurden jungen, männlichen, weißen Neuseeländer-Kaninchen injiziert. Der Einfluß dieser Substanzen auf das Knochenwachstum wurde anhand der Bleiacetat-Vitalfärbung im mikroskopischen Präparat untersucht. Vergleiche auf Grund des zwischen den Bleiacetat-Linien liegenden Abstandes zeigten, daß45Ca keine hemmende Wirkung auf das Knochenwachstum ausübt. Die stärkste temporäre Blockierung des Knochenwachstums wurde durch Alizarinrot S, die schwächste durch Chlortetracyclin hervorgerufen. Je höher die durchschnittlich gegebene Dosis Alizarinrot S, Trypanblau und Chlortetracyclin war, desto stärker machte sich deren hemmender Einfluß auf das Knochenwachstum bemerkbar. Bei einer Gabe von 100 mg/kg Alizarinrot S wurde das Knochenwachstum eingeschränkt, während 150 mg/kg einen kompletten Stillstand desselben bewirkten. Eine Dosis von 100 mg/kg Trypanblau und von 50 mg/kg Chlortetracyclin ließ die Knochenbildung abnehmen, während 350 mg/kg Trypanblau die osteogenetische Aktivität vollständig blockierten. Die Verzögerung des Knochenwachstums durch Chlortetracyclin war rasch überwunden, wogegen sich das normale Knochenwachstum nach Alizarinrot S- und Trypanblau-Gaben nur langsam wieder einstellte.
    Notes: Abstract Various doses of alizarin red S, trypan blue, chlortetracycline and45Ca were injected into young male New Zealand white rabbits. The influence of these agents on bone growth was studied at the microscopic level by comparison with vital staining by lead acetate. From evaluation of bone growth on the basis of the distance between the lead acetate lines,45Ca had no adverse effect; temporary inhibition of bone growth was the largest with alizarin red S and least with chlortetracycline. The higher the average level of alizarin red S, trypan blue and chlortetracycline the stronger was the inhibitory influence on bone growth. Alizarin red S at 100 mg/kg reduced the rate of bone growth and at 150 mg/kg caused complete cessation of bone growth. Trypan blue at 100 mg/kg and 50 mg/kg of chlortetracycline caused a decrease in bone formation and 350 mg/kg of trypan blue stopped osteogenetic activity. The retardation by chlortetracycline was quickly overcome but after alizarin red S and trypan blue, normal bone growth was regained slowly.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 43 (1890), S. 30-30 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THIS afternoon, while ascending a mountain pathway adown which water was trickling, after the torrents of rain that fell in the morning had ceased, I observed an appearance of the surface of running water so exactly like the hexagons of the bees' cells that I looked at it carefully for some ...
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...