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
    Local probe measurements of current filamentation in p-germanium (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 80 (1996), S. 6298-6303 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Current filaments formed in the parameter regime of the low-temperature impurity impact ionization breakdown of p-germanium were investigated by measuring tunneling and point contact characteristics of a scanning tunneling microscope tip fixed at certain sample positions under variation of the sample voltage. The results clearly indicate that the tip current is determined by local potential variations which can be interpreted by a model for the filament taking into account the finite electric resistivity of the sample contacts. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.363706
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    4-4-20 Anti-Fluorescyl IgG Fab' Recognition of Membrane Bound Hapten: Direct Evidence for the Role of Protein and Interfacial Structure (1995)
    s.l. : American Chemical Society
    Biochemistry 34 (1995), S. 11467-11478 
    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/bi00036a020
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    A local selection criterion for the composition of graded thermoelectric generators (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 83 (1998), S. 1150-1152 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We present a procedure that locally determines the composition (from a given set of available materials) of a segmented or graded thermoelectric generator leg in order to maximize its output power to a matched load. The method is based on a new interpretation of the electrical output relation, which is organized to resemble a differential output power along the device coordinate. The procedure is applied to calculate the segment length and output power of a segmented bismuth-telluride/iron-disilicide based thermoelectric generator leg. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.366808
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Integrated YBa2Cu3O7−x magnetometer for biomagnetic measurements (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 68 (1996), S. 1421-1423 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: An integrated dc superconducting quantum interference device (SQUID) magnetometer has been fabricated using a YBa2Cu3O7−x–SrTiO3–YBa2Cu3O7−x multilayer process. The magnetometer consists of a 8.3 mm×8.6 mm pickup coil coupled inductively to a small washer-type SQUID with 9 Ω bicrystal junctions via an integrated 101/2-turn input coil. Using simple direct-coupled read-out electronics with additional positive feedback, a noise level of 9.7 fT/(square root of)Hz at 1 kHz and 53 fT/(square root of)Hz at 1 Hz was measured inside a magnetically shielded room. Due to the low noise level biomagnetic heart and brain signals with high quality and the very weak signals of the peripheral nerve system were recorded. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.116100
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Detection of the induction of Salmonella enterotoxin gene expression by contact with epithelial cells with RT-PCR (1997)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 146 (1997), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: All strains of Salmonella enterica investigated were found to carry the Salmonella enterotoxin gene (stn) as determined by PCR and hybridization studies. However, when using CHO-K1 cells for testing the toxicity of the strains, not all strains showed a toxic effect (cell elongation) on the cells or did so only at a low level. The cultivation of Salmonella in contact with epithelial cells (IEC-6) led to an increase in the production of toxin. The stn gene expression was detectable with the help of the RT-PCR after 3 h of incubation. The RNA of the strains was isolated, transcribed into cDNA (with MMLV-reverse transcriptase) and amplified using PCR. The PCR products were separated electrophoretically using a polyacrylamide gel and detected by silver staining.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1997.tb10189.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Does the serum level of IgA-alpha-1-antitrypsin complex correlate with radiological progression in early rheumatoid arthritis? A 3-year follow-up study (1995)
    Springer
    Rheumatology international 14 (1995), S. 227-230 
    Details
    ISSN: 1437-160X
    Keywords: Early rheumatoid arthritis ; IgA-alpha-1-antitrypsin complex ; Radiological deterioration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We followed the levels of serum IgA-alpha-1-antitrypsin (IgA-AT) complex in 37 patients with early rheumatoid arthritis (RA) during the first 3 years of the disease. The changes in IgA-AT were correlated with a radiological damage score (DS) of the hands assessed according to Larsen. At the onset of the disease, the IgA-AT serum concentration was significantly higher as compared to the control group (0.72±0.22 U vs 0.29±0.14 U, P〈0.01). The level significantly decreased during the 3-year observation period. The DS was significantly higher after 3 years. However, this difference was due to changes in only 11 patients; in 26 patients the DS was almost unchanged. In the group of 11 patients with radiological progression, the level of IgA-AT either remained high or increased significantly (0.95±0.18 U at the onset, 0.97±0.25 U after 3 years), whereas we observed a decrease in IgA-AT in 26 patients without radiological progression (0.63±0.16 U at the onset of the disease, 0.45±0.10 U after 3 years, P〈0.01). Moreover, a relationship between changes in IgA-AT serum level and radiological progression was shown (r=0.60, P〈0.01). Our studies suggested that the relationship between IgA-AT level and radiological progression of the disease should be considered. We cannot exclude the possibility that the constant high level of IgA-AT may cause worsening in bone erosions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00262087
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    The effect of intravenous cyclophosphamide pulse on peripheral blood lymphocytes in lupus erythematosus patients (1997)
    Springer
    Rheumatology international 17 (1997), S. 55-60 
    Details
    ISSN: 1437-160X
    Keywords: Key words Lupus erythematosus ; Cyclophosphamide ; Lymphocytes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In the present study we investigated the long-term effect of intravenous pulse cyclophosphamide (CY) on lymphocyte surface antigens in systemic lupus erythematosus (SLE) patients. Blood samples derived from 17 lupus erythematosus patients were analysed using two- and three-colour flow cytometry. During the CY therapy, the total number of T lymphocytes (CD3+) was reduced by 31.4%, B lymphocytes (CD19+) by 67.4% and NK cells (CD16+) by 27.4%. Six months after the end of the CY regimen, these values recovered to entry levels. At the onset of the study we observed increased percentages of CD3+ CD25+, CD3+ CD4– CD8–, CD4+ CD29+, CD19+ and CD19+ CD5+ cells. The CY treatment regimen decreased the CD3+ CD25+, CD3+ CD4– CD8–, CD19+ and CD19+ CD5+ cells, but increased the CD3+ CD8+ subpopulation. Taken together, a deficiency of CD8+ T cells associated with CD4+ CD29+ predominance may imply an immune regulatory imbalance leading to abnormal CD4+ cell activation and in consequence to autoimmunity. Depletion of CD19+ cells combined with an enlargement of CD8 cells as a result of CY therapy may reduce the enhanced immune response in SLE patients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00006852
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Tissue oxygen measurement and31P magnetic resonance spectroscopy in patients with muscle tension and fibromyalgia (1997)
    Springer
    Rheumatology international 16 (1997), S. 175-180 
    Details
    ISSN: 1437-160X
    Keywords: Fibromyalgia ; Back pain ; Muscle tension ; Tissue oxygen tension ; Magnetic resonance spectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Muscle tissue oxygen tension was measured by a polarographic oxygen fine-needle probe, and inorganic phosphate and creatine phosphate spectra were recorded using magnetic resonance spectroscopy in patients with chronic low back pain and in patients with fibromyalgia. Results were compared with healthy controls. The tissue oxygen tension was markedly higher in those with tense muscles than in normal subjects. Magnetic resonance spectra for inorganic phosphate were higher in patients demonstrating muscle contraction, and intracellular pH was shifted in the alkaline direction in cases with increased muscle tension. Results show that hypoxia is not the result of increased muscle tension, as was thought previously, but results from oversupply of oxygen demanded by the muscle, leading to increased capillary perfusion and rising oxygen tension.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01330292
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Reiselust statt Reisefrust Prävention sexuell übertragbarer Infektionen bei Reisenden durch die Bundeszentrale für gesundheitliche Aufklärung – Konzepte, Maßnahmen, Erfahrungen und Perspektiven (1999)
    Springer
    Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz 42 (1999), S. 412-420 
    Details
    ISSN: 1437-1588
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Mobility and migration pose increasing risks for the health of travellers. Prevention of such health risks, especially of infectious diseases in general and sexually transmitted infections in particular, is seen as a priority task in Germany. Since the eighties the federal agency for health education (BzgA) conceptualized and prioritized health education on travel-associated health risks and STDs. Prerequisites for successful STD prevention are:〈@Normal.lf〉█*To focus on individual independence and self-determination,〈@Normal.lf〉█*To integrate the messages into a positive valued context (health) to diminish avoidance and denial, █*To implement the messages with adequate tonality, functional information or original presentation,〈@Normal.lf〉█*Adequacy for the target groups, █*To attract a high degree of attention, but to avoid distancing (no emphasis on prostitution, sex etc.), █*To offer personal references, █*To work with positive and encouraging messages, not with fear and threats. The evaluation of the education effects shows that nowadays especially travellers with increased STD risks also show better preventive behaviors. So far condom use increased from year to year, but now this seems to level off. Therefore it is important to continue and – if possible – to intensify prevention measures for travellers. Cooperative strategies with the travel industry will become more important. At the same time the quality of travel-associated health education and information has to be improved. Mobilität und Migration: zur Notwendigkeit der Prävention von Infektionskrankheiten
    Notes: Zusammenfassung Mobilität und Migration stellen regional und global ein wachsendes Risiko für die Gesundheit reisender Menschen dar. Die Prävention solcher gesundheitlichen Gefahren erhält gerade in Deutschland einen immer höheren Stellenwert. Von besonderer Bedeutung sind die weltweit zunehmenden Infektionskrankheiten, unter denen die sexuell übertragbaren Infektionen einen hohen Anteil haben. Seit den 80er Jahren hat die Bundeszentrale für gesundheitliche Aufklärung (BZgA) die Aufklärung über reisebedingte Gesundheitsrisiken und insbesondere über sexuell übertragene Infektionen konzeptualisiert und zu einem Arbeitsschwerpunkt gemacht. Grundvoraussetzungen für erfolgreiche STD-Prävention sind: █*Fokussierung der Eigenverantwortung und Selbstbestimmung des Individuums, █*Einbettung in positiv bewertete Themenzusammenhänge (Gesundheit) zur Verminderung von Abwehr und Verleugnung, █*eine adäquate „Tonalität” der Umsetzung mit sachlicher Information oder auch origineller Darstellungsweise. Die STD-Prävention soll also zielgruppenadäquat sein, hohe Aufmerksamkeit erreichen, aber nicht zur Distanzierung führen (keine Hervorhebung von Prostitution, Sex etc.); Differenzierung für persönliche Bezüge bieten und nicht mit Angst und Drohungen, sondern positiven und ermutigenden Botschaften arbeiten. Die Evaluation der Auklärungseffekte zeigt, daß heute gerade Reisende mit erhöhtem STD-Risiko auch in erhöhtem Maße präventives Verhalten zeigen. Der bisherige jährliche Anstieg der Kondomnutzung scheint jedoch derzeit in eine Stagnation überzugehen. Die Fortsetzung und womöglich Intensivierung der Schwerpunktsetzung der Prävention bei Reisen ist deswegen wichtig. Kooperationsstrategien mit der Reiseindustrie haben dabei einen wachsenden Stellenwert. Komplementär muß die Qualität reisebezogener Gesundheitsberatung besser gesichert und gefördert werden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001030050127
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Assessing the biodegradation potential of polymers in screening- and long-term test systems (1995)
    Springer
    Journal of polymers and the environment 3 (1995), S. 133-143 
    Details
    ISSN: 1572-8900
    Keywords: BOD respirometer ; anaerobic biodegradation ; poly(β-hydroxybutyrate) ; poly(ε-caprolactone) ; Bioceta ; Mater-Bi ; aquarium test system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract This paper presents a test scheme for assessing the biodegradation potential of polymers, starting with aquatic screening systems (aerobic and anaerobic) and continuing to long-term systems. At the end of the scheme the material has to prove its behavior under the relevant disposal conditions. Aerobic screening was performed mainly under aquatic conditions, but also in soil, using BOD-respirometry. Carbon balances were performed to obtain a better evaluation of the biodegradation potential. Under anaerobic conditions, biodegradation in an aquatic medium was followed by measuring CH4 and CO2 production. Polymers not fully degraded in the screening systems were tested in aquarium systems for at least 1 year. Biodegradation was followed by monitoring the DOC released in the water, mass loss, and microbial growth on the samples and in the water as well as via FTIR spectroscopy and SEM pictures. Results are presented for the polymers PHB, PHBV, PCL, Mater-Bi AI05H and ZF03U, and Bioceta. By combining the data from the screening with the aquarium system, a good picture of the degradation behavior of the polymers is obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02068464
    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...