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
    Possibilities of FTIR instrumentation for the investigation of fast processes: elongation and relaxation phenomena in polymers
    Amsterdam : Elsevier
    Journal of Molecular Structure 60 (1980), S. 1-6 
    Details
    ISSN: 0022-2860
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0022-2860(80)80025-1
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Application of FTIR-spectroscopy on orientation processes in polyethylene films (1981)
    Springer
    Colloid & polymer science 259 (1981), S. 156-162 
    Details
    ISSN: 1435-1536
    Keywords: FTIR ; Deformation ; Polyethylene ; Band Shape ; Structure ; Splitting
    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 werden die experimentellen Möglichkeiten geschildert, die die FTIR-Spektroskopie bei der Untersuchung von Kristallisation, Orientierung und Relaxation in Polymeren bietet. Experimentelle Untersuchungen an Polyethylenfilmen werden diskutiert und in Bezug gesetzt zu den Änderungen des Ordnungszustandes in den Polymerfilmen während des Verstreck- und Relaxationsvorganges.
    Notes: Summary The experimental possibilities of the FTIR spectrometers for the studies of crystallization, orientation, and relaxation phenomena in polymers are outlined. The experimental results on polyethylene films are discussed and related to changes in the state of order in the polymer films occurring during the stretching and relaxation process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01381756
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Cholesteryl Ester Absorption by Small Intestinal Brush Border Membrane is Protein-Mediated (1995)
    s.l. : American Chemical Society
    Biochemistry 34 (1995), S. 16473-16482 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00050a031
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Molecular beams of polyenes: Retinals and β-carotene (1991)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 95 (1991), S. 4584-4588 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Low temperature, molecular beams of polyenes (retinol, retinal, a Schiff base retinal, and β-carotene) are formed in jet expansions by CO2 laser-induced desorption from a deposited solid surface. Mass spectra of these intact polyenes are detected by resonantly-enhanced ionization mass spectrometry. Laser-desorption conditions which produce essentially no polyene fragmentation are obtained by controlling the focusing conditions of the CO2 laser on the deposited sample.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.461726
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Local-mode effects on the rotational structure of the first stretching overtone band system of stibine, SbH3 (1991)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 95 (1991), S. 7099-7107 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A high-resolution Fourier-transform infrared spectrum, resolution about 0.006 cm−1, of the first stretching overtone band system of stibine has been measured and rotationally analyzed in detail up to J'=22 for both 121SbH3 and 123SbH3 isotopic species. The rotational levels of the A1 and E vibrational states have been analyzed simultaneously by including vibration–rotation coupling terms in the Hamiltonian for the two isotopic species. The A1/E vibrational energy-level separation has been found to be 0.0727(8) cm−1 for 121SbH3 and 0.0763(8) cm−1 for 123SbH3 with the A1 state being higher in energy in both cases. Fits including 1445 transitions with the standard deviation of 0.0024 cm−1 for 121SbH3 and 1322 transitions with the standard deviation of 0.0022 cm−1 for 123SbH3 have been obtained by optimizing altogether 33 upper-state parameters in both cases. A simple local-mode model is shown to account very well for the vibrational dependence of the rotational constants and the coefficients of vibrationally off-diagonal H22 operators.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.461819
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Six-circle diffractometer for surface diffraction using an in-vacuum x-ray detector (1999)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 70 (1999), S. 3239-3243 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We report on the design of a diffractometer, which offers improved capabilities for x-ray experiments in ultrahigh vacuum. Its main features are (i) the possibility to follow the evolution of diffraction spots in situ during adsorption or film deposition; (ii) the measurement of reflections at high exit angles, i.e., large perpendicular momentum transfer. This goal is achieved by placing a movable x-ray detector inside the vacuum chamber. (iii) Other surface analysis equipment, e.g., a low-energy electron diffraction or an electron energy analyzer can be moved in front of the sample and operated simultaneously with x-ray diffraction. (iv) A load lock system—currently in preparation—will allow the quick exchange of samples without breaking system vacuum. In addition, a new design of the chi circle used for sample alignment provides a compact, space-saving design of the diffractometer. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1149899
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Purification of a Phosphatidylinositol 4-Phosphate Kinase from Bovine Brain Membranes (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 54 (1990), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: A phosphatidylinositol 4-phosphate (PIP) kinase (EC 2.7.1.68) was purified from bovine brain membranes in a six-step procedure involving solubilization of the enzyme with 170 mM NaCl followed by chromatography on diethylaminoethyl-cellulose, phosphocellulose, Ultrogel AcA44, hydroxylapatite, and ATP-agarose. The enzyme preparation was nearly homogeneous and was purified 5,600-fold with a final specific activity of 85 nmol/min/mg of protein and a yield of 20%. Its molecular mass was 110 kilodaltons, as estimated by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. The enzyme was specific for PIP; phosphorylation of phosphatidylinositol and diacylglycerol was not observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1990.tb13322.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Improved Biocompatibility of Bioprosthetic Heart Valves by L-Glutamic Acid Treatment (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cardiac surgery 7 (1992), S. 0 
    Details
    ISSN: 1540-8191
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Treatment of glutaraldehyde-fixed pericardium with L-glutamic acid and storage in bacteriostatic preservatives (paraben) stably antagonizes free, reactive aldehyde groups within the fixed bioprosthetic heart valve tissue. In 63-day subcutaneous implants in rats, the calcification rate of this treatment (13.3 ± 2 mg calcium/g wt tissue) was markedly reduced as compared to conventionally treated tissue (169 ± 24 mg/g; p 〈 0.05). To test the influence of tissue released toxic aldehdyes on spontaneous endothelial cell ingrowth in vivo, vascular grafts (8-cm long, 6-mm diameter) from fixed pericardium treated with L-glutamic acid were interposed into the carotid arteries in ten sheep. They were compared to grafts from conventionally treated pericardium implanted at the contralateral side. Following 3 months of implantation, planimetry revealed 49%± 20% of the surface of conventionally preserved pericardium to be covered with red thrombus, but only 12%± 5% in L-glutamic acid treated pericardium (p 〈 0.05). The ultrastructural findings of a closed endothelial cell layer on the graft surface reveals the new technique to be a promising approach towards increased biocompatibility of aldehyde-fixed bioprosthetic heart valves.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1540-8191.1992.tb00775.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
    Doppler Sonographic Evaluation of the CarboMedics Bileaf let Valve Prosthesis: One-Year Experience (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cardiac surgery 7 (1992), S. 0 
    Details
    ISSN: 1540-8191
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Between April 1989 and March 1991, 237 CarboMedics bileaf let valve prosthesis carriers (165 aortic and 72 mitral valves, mean age 54.4 years) were studied prospectively with pulsed-and continuous-wave Doppler at a mean interval of 11.4 months following surgery in order to establish ranges of normal flow velocities and pressure gradients. Physical examination revealed no signs of prosthetic dysfunction or heart failure. Postoperative left ventricular function as measured by fractional shortening was 37% for aortic valve carriers and 30% for mitral valve carriers (p = N S). Mean peak velocity (± SD) across the aortic valve was 2.6 m/sec (± 0.4) and calculated instantaneous peak pressure gradient ranged from 11 to 58 mmHg (mean 28.1 ± 10.3). It has to be emphasized that occasional patients with normally functioning valve prostheses can show unusual high gradients. Ring diameters between 21 and 27 mm showed no significant difference with regard to flow velocities and pressure gradients, whereas in 19-mm valves, significantly higher values could be demonstrated. The 123 aortic valve carriers with normal left ventricular function (fractional shortening 〉 25%) showed significantly higher pressure gradients than the 19 patients with reduced left ventricular function (28.6 ± 11.6 mmHg vs 16.2 ± 5.1 mmHg, p 〈 0.05). In the mitral position, the mean of peak velocity (± SD) was 1.7 ± 0.4 m/sec and pressure half-time was 108 ± 26 msec, representing a calculated valve area between 1.4 to 3.1 cm2 (mean orifice size 2.1 ± 0.5 cm2). No significant difference between valves of different sizes was found. Additionally, left ventricular function had no influence on Doppler-derived hemodynamic measurements. Minimal valvular or paravalvular backflow (extension 〈 1 cm from the prosthesis ring) as indicated by pulsed-wave or color Doppler was present in 44% of aortic valve and 7% of mitral valve prostheses. Five patients (3%) with aortic valve prostheses and two patients (3%) with mitral valve prostheses demonstrated severe para-valvular regurgitation without clinical abnormalities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1540-8191.1992.tb00772.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
    Complications of Port-Access Cardiac Surgery (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cardiac surgery 14 (1999), S. 0 
    Details
    ISSN: 1540-8191
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Port-Access cardiac surgery is a recent technology that is undergoing rapid development. The learning curve associated with this technique is a challenge even for the skilled and experienced cardiac surgeon. Mainly because of femoral cannulation, the use of guidewires, and working through small incisions, Port-Access cardiac surgery contains certain pitfalls that are clearly associated with the technology involved. These pitfalls currently require troubleshooting, but as the technology progresses, this may become less of an issue. Communicating these pitfalls to others is important to help others to avoid or better manage complications and to contribute to improving the technology of Port-Access techniques.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1540-8191.1999.tb00987.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...