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  • 1
    Electronic Resource
    Electronic Resource
    Littrow configuration tunable external cavity diode laser with fixed direction output beam (2001)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 72 (2001), S. 4477-4479 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We have developed an enhanced Littrow configuration extended cavity diode laser (ECDL) that can be tuned without changing the direction of the output beam. The output of a conventional Littrow ECDL is reflected from a plane mirror fixed parallel to the tuning diffraction grating. Using a free-space Michelson wavemeter to measure the laser wavelength, we can tune the laser over a range greater than 10 nm without any alteration of alignment. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1419217
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  • 2
    Electronic Resource
    Electronic Resource
    Patellarsehnenruptur nach vorderer Kreuzbandrekonstruktion mit autologem Patellarsehnen-Knochen-Transplantat Eine Kasuistik (2000)
    Springer
    Der Unfallchirurg 103 (2000), S. 1124-1127 
    Details
    ISSN: 1433-044X
    Keywords: Schlüsselwörter Patellarsehnenruptur ; Kreuzbandersatzplastik ; Faszia-Lata-Streifen ; Keywords Rupture of the patellar ligament ; Anterior cruciate ligament reconstruction ; Fascia-lata-strip
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Patellar ligament ruptures due to a complication after usage of bone-tendon autograft for an anterior cruciate ligament reconstruction happens seldom. During surgeries to restore continuity a fascia-lata-strip may be wrapped in and fixated to secure the primary tendon suture. This may be done in addition to the usually employed patella-tibial wiring cerclage. Whether a matrix for the scarred healing tendon will be created in addition to the construction of a support for the primary tendon seam without a foreign body reaction has to be left to further histological clarifications that cannot be implemented in the present casuistry.
    Notes: Zusammenfassung Eine Patellarsehnenruptur als Komplikation bei Entnahme des Knochenblock-Sehnen-Transplantates zur vorderen Kreuzbandersatzplastik ist selten. Bei kontinuitätswiederherstellenden Eingriffen kann zur Sicherung der primären Sehnennaht neben der üblicherweise verwendeten patellotibiale Drahtzerklage zusätzlich ein Faszia-LataStreifen eingeschlagen und fixiert werden. Ob zusätzlich zur Konstruktion eines Widerlagers für die primäre Sehnennaht bei fehlender Fremdkörperreaktion auch eine Matrix für die narbig einheilende Sehne geschaffen wird, muss weiterführenden histologischen Klärungen vorbehalten bleiben, die in vorliegender Kasuistik nicht durchgeführt werden konnten.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001130050678
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Influence of Body Composition on Quantitative Ultrasound Parameters of the Os Calcis in a Population-Based Sample of Pre- and Postmenopausal Women (2000)
    Springer
    Calcified tissue international 66 (2000), S. 5-10 
    Details
    ISSN: 1432-0827
    Keywords: Key words: Ultrasound densitometry — Body composition — Fat mass — Lean body mass — Epidemiology.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Abstract. Body mass is known to be related to measures of bone mineral density (BMD) as well as to parameters of quantitative ultrasound (US). To examine the effect of the body compartment's fat mass and lean body mass on quantitative ultrasonic bone parameters, data from a sample of 3241 German women were analyzed. Anthropometric measures, including skinfold thickness, were obtained from standardized measurements, and fat and lean body mass were derived from classical regression formulas based on skinfold measurements. Ultrasonic bone measurements were performed on the right os calcis, and speed of sound (SOS) and broadband ultrasound attenuation (BUA) were determined. Women were grouped into pre- and postmenopausal status; postmenopausal women were further stratified into ever and never hormone-replacement user. Correlation analysis indicated lean body mass to be stronger correlated with BUA than fat mass in both pre- (r = 0.23; P= 0.0001) and postmenopausal women with (r = 0.19; P= 0.0001) and without hormone replacement therapy (HRT) (r = 0.26; p = 0.0001). SOS demonstrated very small or no associations with body mass or its components. Multiple linear regression models were used to describe the relationship among body weight, fat mass, and lean body mass on BUA after adjustment for confounding variables. Both in pre- and postmenopausal women lean body mass was more strongly related to BUA than fat mass. However, body mass measures explained only small amounts of the overall variance in BUA (R2= 1–3% in premenopausal women; R2= 1% postmenopausal with HRT; R2= 4–5% in postmenopausal women without HRT). In conclusion, the strong influence of body mass and its components previously reported for BMD was not observed for quantitative ultrasonic bone parameters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002230050002
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    Paper (German National Licenses)
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