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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 119 (1975), S. 279-291 
    ISSN: 1432-1076
    Keywords: Vitamin A ; Carotene ; Retinol-binding protein ; Prealbumin ; Cystic fibrosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei 42 Patienten mit cystischer Fibrose (CF) und bei 92 Normalpersonen wurden die Serumkonzentrationen von Vitamin A, Carotin, retinolbindendem Protein (RBP) und Präalbumin (PA) bestimmt. Alle Patienten mit CF erhielten Vitamin A-Palmitat in Form eines Multivitaminpräparates in der doppelten empfohlenen Dosis für Gesunde. Bei der statistischen Prüfung waren die Serumkonzentrationen von Vitamin A, Carotin und RBP bei den Patienten mit CF im Vergleich zu den Normalpersonen erniedrigt (P〈0,001). Für das PA ließ sich zwischen beiden Gruppen ein statistisch signifikanter Unterschied nicht sichern. Bei den Normalpersonen fand sich nur für das PA ein altersabhängiger Anstieg (r=0,455, P〈0,001). Bei den Patienten mit CF nahmen die Serumkonzentrationen von Vitamin A in Korrelation zum Lebensalter ab (r=−0,423, P〈0,01). PA und RBP sowie RBP und Vitamin A waren bei beiden Gruppen signifikant gleichsinnig korreliert (P〈0,001). Bei den Normalpersonen ergab sich auch zwischen Vitamin A und Carotin eine positive Korrelation (r s=0,606, P〈0.001), während bei den Patienten mit CF diese Beziehung schwächer signifikant war (r s=0,311, P〈0,02).
    Notes: Abstract Vitamin A, carotene, retinol-binding protein (RBP), and prealbumin (PA) have been measured in 42 children and adolescents with cystic fibrosis (CF) and in 92 normal controls. All patients with CF were on vitamin A palmitate in twice the dose for normals. For statistical analysis U-test of Wilcoxon, Mann and Whitney, parametric correlation coefficient and Spearman's rank correlation coefficient were used. Compared with those in normal controls mean serum concentrations of vitamin A, carotene and RBP were depressed in patients with CF (P〈0.001), whereas PA levels did not differ significantly from those of normal individuals. In normal controls there was only in serum concentration of PA an elevation with age (r=0.455, P〈0.001). In patients with CF, serum concentration of vitamin A decreased in correlation with age (r=−0.423,P〈0.01). PA and RBP as well as RBP and vitamin A were positively related in both groups (P〈0.001). In normal individuals there was a highly significant correlation between serum concentrations of vitamin A and carotene (r s=0.606, P〈0.001), whereas in patients with CF this relationship was less significant (r s=0.311, P〈0.02).
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 156 (1997), S. 889-890 
    ISSN: 1432-1076
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 122 (1976), S. 241-248 
    ISSN: 1432-1076
    Keywords: Alpha1-fetoprotein ; Cystic fibrosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei 38 Kindern und Jugendlichen mit cystischer Fibrose, 19 gesunden Kindern und 62 gesunden Erwachsenen wurden die Serumkonzentrationen des Alpha1-Feto-proteins im Radioimmunoassay bestimmt. 97,5% der Alpha1-Fetoprotein-Werte der Patienten mit cystischer Fibrose und 95% der Meßwerte der gesunden Kinder lagen innerhalb des Normbereiches (1–9 ng/ml), der für gesunde Erwachsene ermittelt worden war. Aufgrund unserer eigenen Untersuchungsergebnisse und bei kritischer Bewertung der bisher publizierten Befunde erscheint die Alpha1-Fetoprotein-Bestimmung im Serum zur Erfassung der homozygoten und heterozygoten Genträger der cystischen Fibrose nicht geeignet.
    Notes: Abstract In 38 children and adolescents with cystic fibrosis, in 19 normal children and 62 healthy adults the serum α1-fetoprotein concentrations were measured by radioimmunoassay. In cystic fibrosis patients 97.5% and in normal children 95% of the α1-fetoprotein values were within the normal range for healthy adults (1–9 ng/ml). Critical judgement of the reported findings in literature and our own results demonstrate that the investigation of α1-fetoprotein in the serum cannot serve for detecting homozygotes of cystic fibrosis genes or heterozygote carriers.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A comparison is made between the second-order polarizabilities of nitropyridine derivatives determined with two different methods: electric-field-induced second-harmonic generation (EFISH) and a solvatochromic method. Both techniques yield the same values within the experimental errors, showing that the main contribution of the microscopic nonlinearity arises from a single intramolecular charge-transfer transition. Based on the quantum-mechanical two-level model, the solvatochromic method also yields important molecular parameters, such as transition and excited-state dipole moments. The second-order polarizabilities determined with the EFISH method are shown to follow the theoretical two-level dispersion.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 69 (1996), S. 13-15 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We show that the organic salt 4-N,N-dimethylamino-4′-N′-methyl-stilbazolium tosylate (DAST) is a very interesting material for electro-optic applications in the near infrared. The electro-optic coefficients, namely r111, r221, r331, r113, r223, and r333, were determined in the spectral range of 700 up to 1535 nm using optical samples cut from large high quality bulk crystals. DAST combines large electro-optic coefficients, e.g., r111=77±8 pm/V at λ=800 nm and r111=47±8 pm/V at λ=1535 nm, with low dielectric constants, e.g., ε1=5.2±0.4. This combination leads to large polarization-optical coefficients. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A case of an unusually early manifestation of autosomal dominant polycystic kidney disease (ADPKD) is reported that was prenatally diagnosed by ultrasound. The ultrasonographic picture showed greatly enlarged kidneys and increased echogenicity that was indistinguishable from cases of autosomal recessive polycystic kidney disease or Meckel syndrome without further information. Because of two further cases of early manifestation of ADPKD within the family reported (brother and cousin), as well as several other “familial” cases reported in the literature, we postulate that genetic factors are involved (modifying alleles). When repeated observations of “familial” cases of early manifestations of ADPKD are made, genetic counseling should be considered.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Der Gynäkologe 30 (1997), S. 170-180 
    ISSN: 1433-0393
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zusammenfassung Detaillierte Kenntnisse über die normale Morphogenese des Herzens beim Menschen sind die Voraussetzung für ein besseres Verständnis von pathologischen Entwicklungsabläufen. Die Kardiogenese vollzieht sich im wesentlichen zwischen der 3. bis 8. Woche post ovulationem, beginnt mit der Formierung des Herzschlauchs beim etwa 2 mm langen Embryo und ist letztendlich erst nach der Geburt mit dem Verschluß des Foramen ovale definitiv abgeschlossen. Der Prozeß der „Herzschleifenbildung“ schafft die formalen Grundlagen für einen der wichtigsten Entwicklungsschritte in der gesamten Organogenese des Herzens, nämlich der Scheidewandbildung bzw. Septierung des Hohlraumlumens in die getrennten Strombahnen des systemischen und pulmonalen Kreislaufsystems. Die beim Erwachsenen charakteristischen Lagebeziehungen der ventrikulären Ausflußbahnen zu einander sowie der Verwindung von Aorta und Pulmonalisstamm umeinander sind als das Ergebnis der komplexen, sich in Richtung des Blutstroms fusionierenden, paarigen Septenanlagen anzusehen. Die Morphogenese der großen herznahen Gefäßstämme sowie die des Ductus arteriosus Botalli sind entwicklungsmäßig eng miteinander verknüpft. Nach Umgestaltung des primär symmetrischen Kiemenbogenarteriensystems zum definitiven Aortenbogen und seiner Äste stellt der Ductus arteriosus Botalli die einzige Verbindung zwischen Körper- und Lungenkreislauf dar. Die sog. teratogenetischen Determinationsphasen repräsentieren jene Zeitspannen, die für die Entstehung bestimmter Herzfehlbildungen von Bedeutung sind, wobei unterschiedliche pathogenetische Mechanismen formal nahezu identische kardiovaskuläre Anomalien verursachen können.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1572-8951
    Keywords: EFISH ; second-order hyperpolarizability ; donor-acceptor group ; π-electron system ; semiempirical calculation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The second-order nonlinear optical properties of p-dimethylaminobenzylidene-1,3-indandione (DABI) have been measured using electric field-induced second-harmonic generation (EFISH) at wavelengths of 1064 nm and 1907 nm in dioxane. The absolute values of the microscopic hyperpolarizabilities are β1064 nm=1064×10−40 m4 V−1 and β1907 nm=150×10−40 m4 V−1. The condensation of 1,3-indandione with substituted aromatic aldehydes offers a pathway to a class of molecules with extended π-electron systems. In the case of DABI, semiempirical calculations and a simple, two-level model indicate that the relatively high values of the microscopic hyperpolarizability are due to several factors which, in combination, positively enhance the electron donor-acceptor group-induced polarizability of DABI. The nonlinear optical properties of DABI are compared with experimental data for 2-methyl-4-nitroaniline (MNA).
    Type of Medium: Electronic Resource
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