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  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Steroid Biochemistry 9 (1978), S. 843 
    ISSN: 0022-4731
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Chromatography A 192 (1980), S. 240-246 
    ISSN: 0021-9673
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Chromatography A 152 (1978), S. 250-252 
    ISSN: 0021-9673
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Chromatography A 192 (1980), S. 240-246 
    ISSN: 0021-9673
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Clinical oral investigations 3 (1999), S. 194-200 
    ISSN: 1436-3771
    Keywords: Key words Elution ; Monomer ; TEGDMA ; HPLC ; Methacrylic acid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  The toxic effects of mercury derived from amalgam fillings have been a focus of controversy in Germany during the last 25 years. As alternatives to amalgam, composites are used widely to restore anterior and posterior permanent teeth. This study quantifies the amount of TEGDMA and methacrylic acid that can be derived from a polymerized commercial hybrid composite material. Different specimens were made with different curing methods with and without an oxygen inhibition layer. To simulate the removal of composite fillings, some samples were pulverized. The specimens were eluted in distilled water at 37°C for different time intervals. To check the influence of acid conditions, pulverized material was incubated in 6 M HCl. The separation of the eluted chemical resin components was done by HPLC. A defined mixture of pure components was used as an external standard for the identification and quantification of the eluted components. The results focus on the release of triethylenglycoldimethacrylate (TEGDMA) and methacrylic acid. Concerning the different incubation methods, the results showed higher TEGDMA elution with oxygen inhibited surface layer and with the pulverized samples. Within acid conditions, the amount of TEGDMA found was low, but the amount of methacrylic acid increased. Small resin monomers like TEGDMA are primarily eluted from composite in aqueous solutions. Within acid conditions a hydrolytic disintegration of the ester bonding of the monomers could be observed. Methacrylic acid – a substance with allergenic potential – could be detected.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Archives of gynecology and obstetrics 242 (1987), S. 179-181 
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Archives of gynecology and obstetrics 245 (1989), S. 149-154 
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In der Schwangerschaft trägt die Mutter ein mit eigener Antigenität ausgestattetes, wachsendes Transplantat, den Embryo oder Fetus. Bei regelrechtem Schwangerschaftsverlauf bildet das maternale Immunsystem blokkierende Faktoren, so daß der Embryo einer Abstoßung durch den mütterlichen Organismus entgeht. Störungen des immunologischen Gleichgewichtes zwischen mütterlichem Immunsystem und Embryo führen zum immunologisch bedingten Abort. Die Diagnostik besteht in dem fehlenden Nachweis schwangerschafts-schützender Faktoren. Neuerdings kann bei den Patientinnen mit immunologisch bedingter Abortneigung eine spezifische Immuntherapie zur Abortprophylaxe durchgeführt werden.
    Notes: Summary As etiological factors responsible for repeated miscarriages disturbances of the maternal-fetal immunoregulation are involved. Diagnostic aspects of the immunobiology of abortion and the clinical management of habitual abortion by immunotherapy are discussed.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1432-0711
    Keywords: Prenatal sex diagnosis ; Amniotic fluid testosterone ; Radioimmunoassay with and without chromatography ; Pränatale Geschlechtsdiagnose ; Fruchtwasser-Testosteron ; Radioimmunoassay mit und ohne Chromatographie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die radioimmunologische Bestimmung des immunoreaktiven (nicht chromatographisch separierten) Testosterons im Fruchtwasser erscheint zur fetalen Geschlechtsbestimmung nur bedingt geeignet. Durch Parallel-bestimmungen wird überprüft, ob die Messung von Testosteron (T) mit Chromatographie der Fruchtwasserproben gegenüber der Messung von immunoreaktivem Testosteron (iT) zu einer Verbesserung bezüglich der Diagnose des fetalen Geslechts führt. In 111 Fruchtwasserproben aus der 15.–19. Schwanger-schaftswoche wurden iT und T parallel bestimmt. Es ergeben sich signifikante Unterschiede der iT- und T-Mittelwerte zwischen beiden Geschlechtern (p 〈 0,001). Die 95%-Vertrauensbereiche der iT-Werte von männlichen und weiblichen Feten überschneiden sich beträchtlich. In den Überschneidungsbereich von 330,0–490,0 pg/ml fallen 32% (n = 19) der männlichen und 29% (n = 15) der weiblichen Werte. Im Gegensatz hierzu sind Überschneidungen der 95%-Vertrauensbereiche bei Messung der T-Konzentrationen nur in geringem Umfang nachweisbar. In den Überschneidungsbereich von 78,0–90,0 pg/ml fallen 10% (n = 6) der männlichen und 5,9% (n = 3) der weiblichen Werte. Durch die Messung von Testosteron nach Chromatographie der Proben konnte in 92% der Fälle eine richtige Geschlechtsdiagnose gestellt werden. Die chromatographische Vorreinigung des Fruchtwassers beseitigt geschlechtsspezifische Unterschiede kreuzreagierender Steroide im Fruchtwasser beider Geschlechter.
    Notes: Summary Amniotic fluid testosterone measured by radioimmunoassay (RIA) without chromatography (immunoreactive testosterone) seems not to be a definitive test for prenatal sex determination in all cases. In this study testosterone (T) levels measured by RIA with chromatography of the amniotic fluid samples were compared with immunoreactive testosterone (iT) values, to determine the predictive accuracy of the two methods. In 111 amniotic fluid samples between 15 and 19 weeks of gestation iT and T were measured parallelly. There are significant differences between iT- and T-means of both sexes (p 〈 0.001). 95%-confidence limits of iT-values of the male and female fetuses are largely overlapping. In contrast, the overlap of 95%-confidence limits of the T-values is only minor. The measurement of testosterone with chromatography of the amniotic fluid samples shows for prenatal sex determination in over 90% accuracy. This result is due to the elimination of sex-specific differences in crossreacting steroids within the amniotic fluid of both sexes.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Archives of gynecology and obstetrics 236 (1985), S. 153-160 
    ISSN: 1432-0711
    Keywords: Early pregnancy failure ; Concentrations of estradiol, progesterone, and 17-hydroxyprogesterone ; Clinical value
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Concentrations of estradiol (E2), progesterone (P), and 170H-progesterone (170H-P) were measured by radioimmunoassay in serum samples obtained from a group of 98 women with threatened (n = 60), incomplete (n = 22) or missed (n = 16) abortion between the 4th and 17th week of pregnancy. The diagnosis was based on the clinical symptoms and the results of ultrasound scanning. In threatened abortion 54, out of 60 E2 values were within the 95% normal range, including most of the cases in which abortion occured later. In incomplete abortion 18 of 21 E2 values were below the lower 95% confidence limit. In missed abortion, 11 of 15 E2 values were abnormal, being below the 95% normal range. Similar patterns in women with threatened, incomplete or missed abortion can be observed for values of P and 170H-P. Our results indicate that serum determinations of ovarian and placental steroids in women with early pregnancy failure are not of great clinical value.
    Type of Medium: Electronic Resource
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