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  • 1985-1989  (7)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 116 (1985), S. 1291-1304 
    ISSN: 1434-4475
    Keywords: Schiff-base complexes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es wurden Aryliden-Anthranilsäure-Schiff-Basen mit Th(IV), UO2(II), La(III), Ce(III) und Zr(IV) isoliert und mittels Elementaranalysen, Elektronen-und IR-Spektroskopie und Leitfähigkeitsmessungen untersucht. Es wird aus den Untersuchungen geschlossen, daß Salicylidenanthranilsäure (L 3) als bivalenter dreizähniger ONO-Ligand (L −2) an das Metallion koordiniert, währenddessen die anderen Liganden als monovalente zweizähnige Liganden agieren. Außerdem wurden Struktureffekte dieser Verbindungen in bezug auf ihre Komplexbildungstendenz untersucht. Die Möglichkeit, daß der Cu(II)-Komplex vonL 3 über die Koordination mit dencis-Sauerstoff-Atomen und unter Bildung eines zweikernigen Metallkomplexes als zweizähniger Ligand agieren kann, wurde untersucht.
    Notes: Abstract Arylidene-anthranilic acidSchiff base complexes with Th(IV), UO2(II), La(III), Ce(III), and Zr(IV) have been isolated and studied by several techniques, e.g. elemental analysis, electronic and IR spectra and conductance measurements. It is concluded that the salicylideneanthranilic acidL 3 is coordinated to the metal ion as bivalent tridentate ONO ligand (L −2) while the other ligands behave as monovalent bidentate ON ligands. Furthermore, the molecular structure effect of these compounds on their tendency towards complex formation was investigated and discussed. The possibility that the Cu(II) complex ofL 3 can act as bidentate ligand, coordinating through itscis-oxygen atoms to form binuclear metal complexes was studied.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Clinical rheumatology 8 (1989), S. 393-397 
    ISSN: 1434-9949
    Keywords: Sickle Cell ; Avascular Necrosis ; Arthritis ; Temporomandibular Joint
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Avascular necrosis of temporomandibular joint (TMJ) in sickle cell disease was not reported in patients suffering from this disease. In this report, we present a case of a young Saudi female with avascular necrosis of the left temporomandibular joint associated with avascular necrosis of head of left femur, and early changes of infarction of the humeral head of the left shoulder. Clinical examination, laboratory investigations, tomography and computerized tomography scanning, confirmed the diagnosis of sickle cell disease, and the development of avascular necrosis of the left temporomandibular joint.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1439-0973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei 94 Kindern mit akuter Hepatitis im Alter von zwei bis 14 Jahren wurde bei Einweisung in das Embaba Fever Hospital in Kairo, Ägypten, im Zeitraum von Januar bis April 1983 eine ätiologische Abklärung mittels Seromarkern für Hepatitis A, B und D vorgenommen. Bei 4% der Kinder wurde eine Hepatitis A, bei 33% eine Hepatitis B, bei 10% eine akute Hepatitis bei HBsAg-Trägerstatus, bei 2% eine Doppelinfektion mit HAV und HBV und bei 50% eine Non-A, Non-B-Hepatitis diagnostiziert. 96% der Kinder hatten eine Hepatitis A durchgemacht. 17% (fünf der 29 getesteten) Kinder mit akuter Hepatitis B wiesen Anti-delta-Antikörper auf. 15% (sechs von 40) HBsAg-positive Kinder waren HBeAg positiv. Bei zwei Patienten fanden sich gleichzeitig HBsAg und anti-HBs. Klinische, epidemiologische und biochemische Befunde wurden differential-diagnostisch ausgewertet, sie trugen jedoch nicht zu einer Differenzierung zwischen Hepatitis B und NANB bei. Bei HBV-Infektionen waren Buben häufiger betroffen. 58% der Kinder mit HBV- und 70% der Kinder mit NANB-Virus-Infektionen wiesen keine Risikofaktoren auf. 42% der übrigen mit HBV und 30% der mit NANB-Viren infizierten Kinder hatten Injektionen oder einen chirurgischen Eingriff erhalten, in keinem Fall war eine Bluttransfusion erfolgt oder Kontakt mit einem Hepatitisfall bekannt.
    Notes: Summary Seromarkers for hepatitis A, B and D were used to determine the cause of acute hepatitis in 94 children (age 2 to 14 years) propsectively studied when they were admitted to Embaba Fever Hospital in Cairo, Egypt, between January and April 1983. The diagnoses were: hepatitis A (4%), hepatitis B (33%), acute hepatitis in HBsAg carriers (10%), dual infections with A and B (2%), and hepatitis non-A, non-B (NANB) (50%). Past hepatitis A was diagnosed in 96%. Among acute hepatitis B infections, 17% (5 of 29 tested) had anti-delta antibody; of HBsAg positive persons, 15% (6 of 40) were HBeAg positive. Two patients had simultaneous presence of HBsAg and anti-HBs. For differential diagnosis, clinical, epidemiological, and biochemical findings were evaluated but did not distinguish hepatitis B from NANB hepatitis. Males predominated for HBV infections. No risk factors were found for 58% of HBV and 70% of NANB infections; of the remaining patients, 42% percent of HBV and 30% of NANB infections were associated with injections or surgery but none with transfusion or known contact with hepatitis cases.
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  • 4
    ISSN: 1573-7195
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Resumé Les niveaux de prostaglandine utérine (PG) et les réactions cellulaires aux DIU ont été évalués chez soixante femmes. Celles qui utilisaient ces dispositifs depuis peu de temps (n=30) ont été étudiées dans un cycle contrôle et 3 mois après l'insertion, alors que les utilisatrices à plus long terme (n=30) ont été examinées au moins 2 ans après l'insertion du dispositif. On a procédé à un lavage utérin pendant la phase proliféative et lutéinique de chaque cycle menstrual examiné; les constituants cellulaires ont été comptés et les niveaux de PGE2 et PGF2alpha, ainsi que leurs métabolites 13,14-dihydro-15-cétones ont été mesurés. On a constaté une élévation significative des niveaux de PG dans le lavage utérin effectué peu de temps après l'insertion du DIU, notamment pendant la phase lutéinique. On a toutefois observé une réduction significative des niveaux de PG chez les utilisatrices de longue date, bien que la réaction cellulaire ait marqué une augmentation continue. L'absence de corrélation entre les réactions biochemique et biologique laisse penser qu'aucune des deux ne dépendait totalement de l'autre. La baisse des niveaux de PG chez les utilisatrices à long terme ne vient pas à l'appui du concept qui attribue un rôle-clé à ces substances dans le mécanisme d'action des DIU. L'élévation passagère des niveaux de PG après l'insertion coincïde avec la phase d'augmentation de l'écoulement sanguin et des douleurs.
    Abstract: Resumen En sesenta mujeres se evaluaron los niveles de prostaglandina uterina (PG) y la reacción celular en respuesta a los DIU. Se estudiaron pacientes que los usaron por poco tiempo (n=30) en un ciclo de control y 3 meses después de la inserción de un DIU. Las pacientes que los usaron por largo tiempo (n =30) fueron estudiadas a no menos do dos años despues de la inserción del dispositivo. Se hizo un lavado uterino en la fase proliferativa y luteal de cada ciclo menstrual investigado; se contaron los componentes celulares y se midieron los niveles de PGE2, PGF2alpha y sus 13,14-dehidro-15-ketometabolitos. Se observó un aumento significativo en los niveles de PG en el lavado uterino poco despues de la inserción del DIU, particularmente en la fase luteal. Sin embargo, hubo una reducción significativa en las usuarias a largo tiempo aunque la reacción celular mostró un incremento continuo. La ausencia de correlación entre las respuestas bioquímicas y biológicas indicó que ninguna era totalmente dependiente de la otra. Los disminuidos niveles de PG en las usuarias a largo tiempo, no corroboran el concepto de un rol clave para estas substancias en el mecanismo de acción de los DIU. El aumento temporario en los niveles de PG posterior a la inserción, coincide con la fase de mayor sangrado y dolor.
    Notes: Abstract Uterine prostaglandin (PG) levels and cellular reaction in response to IUDs were elevated in sixty women. Short-term users (n=30) were studied in a control cycle and 3 months after IUD insertion, and long-term users (n=30) were studied at least 2 years after device insertion. A uterine wash was performed in the proliferative and luteal phase of each investigated menstrual cycle; the cellular components were counted and levels of PGE2, PGF2alpha and their 13,14-dihydro-15-keto metabolites measured. A significant rise in PG levels was observed in the uterine wash shortly after IUD insertion, particularly in the luteal phase. However, there was a significant reduction in PG levels among long-term users, though the cellular reaction showed a continued increment. The absence of correlation between the biochemical and biological responses indicated that neither of them was totally dependent on the other. The decreased PG levels among long-term users does not support the concept of a key role for these substances in the mechanism of action of IUDs. The temporary post-insertion rise in PG levels coincides with the phase of increased bleeding and pain.
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  • 5
    ISSN: 1573-7195
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Resumé On a étudié chez 60 femmes les conséquences de l'administration par voie orale (100 mg/jour) d'indométhacine, puissant inhibiteur de la biosynthèse de la prostaglandine (PG), sur les niveaux de PG et le profil cellulaire dans les flux d'elimination utérine en résponse à l'utilisation d'un DIU (stérilet de Lippe, taille C). L'indométhacine a réduit le nombre des cellules tant pendant la phase folliculinique que pendant la phase lutéinique des cycles menstruels avant et après l'insertion du dispositif. Cet anti-inflammatoire a fait baisser les niveaux de PGE2 et de PGF2alpha au cours des deux phases du cycle avant l'insertion du stérilet. Après l'insertion, il n'a inhibé que la formation de la PGF2alpha et de son métabolite 13,14-dihydro-15-cétone pendant la phase lutéinique mais non pendant la phase folliculinique. Toutefois, chez les utilisatrices de longue date, ces substances ont fait baisser les niveaux de toutes les prostaglandines étudiées pendant la phase lutéinique et de la seule PGF2alpha et son métabolite pendant la phase folliculinique. Cet article examine les liens entre ces constatations et les mécanismes de l'action contraceptive des DIU ainsi que leurs effects secondaires.
    Abstract: Resumen En sesenta mujeres se estudió el efecto de la administración oral de indometacina (100 mg/día), un potente inhibidor de biosíntesis de prostaglandina (PG), en los niveles de PG y en el perfil celular en lavados uterinos, en respuesta al uso de un DIU (Asa de Lippes, tamaño C). La indometacina redujo el contaje celular en ambas fases, folicular y luteal, de los ciclos menstruales antes y después de la inserción del DIU. La droga antiinflamatoria disminuyó los niveles de PGE2 y PGF2alpha en ambas fases del ciclo antes de la inserción del DIU. Después de la inserción solamente inhibió la formación de PGF2alpha y sus 13,14-dehidro-15-keto metabolites en la fase luteal pero no en la fase folicular. Sin embargo, en las usuarias a largo plazo las drogas redujeron los niveles de todas las PG estudiadas en la fase luteal y solamente la PGF2alpha y sus metabolites en la fase folicular. Se discutieron las implicaciones de estos hallazgos en el mecanismo de la acción anticonceptiva de los DIU y sus efectos colaterales.
    Notes: Abstract The effect of oral administration of indomethacin (100 mg/day), a potent inhibitor of prostaglandin (PG) biosynthesis, on the PG levels and cellular profile in the uterine flushings in response to the use of an IUD (Lippes Loop size C) was studied in sixty women. Indomethacin reduced the cell counts in both follicular and luteal phases of menstrual cycles before and after IUD insertion. The anti-inflammatory drug decreased PGE2 and PGF2alpha levels in both phases of the cycle before IUD insertion. After insertion, it inhibited only the formation of PGF2alpha and its 13,14-dihydro-15-keto metabolite in the luteal phase but not in the follicular phase. In long-term users, however, the drugs reduced the levels of all PGs studied in the luteal phase and only PGF2alpha and its metabolite in the follicular phase. The implications of these findings in the mechanisms of contraceptive action of IUDs and their side effects are discussed.
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  • 6
    ISSN: 1432-1955
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Specific antischistosomal IgG, IgM, and IgE were estimated by ELISA in 117 rural school students before specific treatment with praziquantel monthly for 3–4 months thereafter. IgG and IgM were estimated as percentage of bound antibodies. IgE was estimated by avidin-biotin ELISA (AB-ELISA) as IU/ml using a panel of known IgE standards. Soluble surface Schistosoma mansoni adult worm antigen was used for all estimates. Total IgE was estimated in a smaller group by an ELISA kit. The percentage of specific IgE was calculated. A group of endemic controls (22 students) and non-endemic controls (17 cases) were included. Statistical analysis of results showed the specific immunoglobulins to be significantly reduced 2 months after treatment of the schistosomal cases. These reduced levels, however, were still significantly higher than those of controls. The presence of early hepatosplenomegaly and the co-existance of other parasites had no significant influence on the results. No correlation could be established between the levels of specific antischistosomal IgG, M and E and the intensity of infection. The significance of these results is discussed.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reaction of 5,6-dihydro-5-azacytidine hydrochloride 1 with 2-acetoxy-isobutyryl chloride produced 5′-O-(2,5,5-trimethyl-1,3-dioxolan-4-on-2-yl)-3′-O-acetyl-5,6-dihydro-2,2′-anhydro-1-β-D-arabinofuranosyl-5-azacytosine hydrochloride 2, which upon partial hydrolysis with EtOH/HCl at 4°C gave 3′-O-acetyl-5,6-dihydro-2,2′-anhydro-1-β-D-arabinofuranosyl-5-azacytosine hydrochloride 3. The hydrolysis of 3 with EtOH/HCl at 25°C gave 2,2′-anhydro-5,6-dihydro-1-β-D-arabinofuranosyl-5-azacytosine hydrochloride 4. Silylation oxidation of 3 and 4 with BSTFA or BSA in acetonitrile produced the N-substituted derivatives of 1-β-D-arabinofuranosyl-5-azacytosine 8 and 7, respectively.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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