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
Filter
  • 1995-1999  (1)
  • 1990-1994  (2)
  • 1960-1964
  • 1955-1959
  • rodlikemicelle  (2)
  • Aging effects  (1)
  • 1
    Electronic Resource
    Electronic Resource
    The viscoelasticity of spinnable solutions of alkyltrimethylammonium salicylates (1992)
    Springer
    Colloid & polymer science 270 (1992), S. 249-258 
    Details
    ISSN: 1435-1536
    Keywords: Viscoelasticity ; spinnability ; tetradecyltrimethylammoniumsalicylate ; hexadecyltrimethylammoniumsalicylate ; rodlikemicelle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The viscoelasticity has been measured for aqueous solutions of tetradecyl-and hexadecyltrimethylammonium salicylates (C14TASal, C16TASal). The aqueous solutions of C14TASal without salt displayed the gel-like behavior at 10.0×10−2 g cm−3, but those more dilute than 3.2×10−2 g cm−3 presented the viscoelasticity similar to that of a Maxwell liquid. The Maxwell-like behavior was converted to the polymer-like one on the addition of (0.1–0.2) M NaBr or (0.02–0.2) M NaSal. The gel-like viscoelasticity can be connected with the spinnability of “cohesive fracture failure”, and the Maxwell-like and polymer-like viscoelasticities are concerned with the spinnability of “ductile failure”. The gel-like and Maxwell-like viscoelasticities originate in the pseudo-network formed by the pseudo-linkages between rodlike micelles, while the polymer-like viscoelasticity is caused by the entanglement of long rodlike micelles in semidilute and concentrated solutions. The aqueous solutions of C16TASal behaved very similar to those of C14TASal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00655477
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    The spinnability of viscoelastic solutions of tetradecyl- and hexadecyl-trimethylammonium salicylates (1990)
    Springer
    Colloid & polymer science 268 (1990), S. 460-468 
    Details
    ISSN: 1435-1536
    Keywords: Spinnability ; viscoelasticsurfactantsolution ; tetradecyltrimethylammoniumsalicylate ; hexadecyltrimethylammonium salicylate ; rodlikemicelle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The spinnability was measured for aqueous viscoelastic solutions of tetradecyl- and hexadecyltrimethylammonium salicylates (C14TASal, C16TASal) in the absence and presence of sodium salicylate (NaSal) and sodium bromide (NaBr). The spinnability is classified into two types, D and C. While the intrinsic drawing length in type D is proportional to the drawing velocity, the drawing intrinsic length in type C decreases with the drawing velocity or is independent of it. The spinnability changes from type D to C, as the drawing velocity and the surfactant concentration increase, and the temperature lowers. The effect of salt is different between NaSal and NaBr. It can be assumed that a pseudo-network structure composed of rod-like micelles is formed in viscoelastic and spinnable surfactant solutions. Then, the spinnability depends on the balance between the elasticity and the viscosity in which the structure results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01411005
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Age-related changes in the compound action potentials of the eighth nerve in guinea pigs (1997)
    Springer
    European archives of oto-rhino-laryngology and head & neck 254 (1997), S. 145-149 
    Details
    ISSN: 1434-4726
    Keywords: Eighth nerve compound action potential ; Aging effects ; Guinea pig
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The eighth nerve compound action potential (CAP) in 95 guinea pigs was measured using click stimuli to investigate age-related changes in their neural auditory thresholds. The animals were separated into three groups: group A (n = 43, 86 ears; 2–4 months old); group B (n = 29; 58 ears, 13–15 months old); and group C (n = 23; 46 ears, 23–25 months old). With increasing age, a gradual elevation of CAP thresholds was clearly seen among the three groups. The negative peak (N1) latencies of the CAP were prolonged, and the N1 amplitudes of the CAP decreased. There were significant differences in N1 latencies among the three groups and in N1 amplitudes between groups A and B, and between groups A and C. However, the rate of decline of the thresholds as well as the input-output function curves of the CAP varied in some of the oldest animals, suggesting that there were some individual differences in degenerative aging processes of the auditory system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02471279
    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...