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  • 1990-1994  (5)
  • 1992  (5)
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Journal of chemical crystallography 22 (1992), S. 523-526 
    ISSN: 1572-8854
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract The title compound C4H12PtN10Br4 was prepared and characterized by means of X-ray, and IR measurements. The crystals are monoclinic, space groupP21/c, (C 2h 5 No. 14) witha=6.875(1),b=15.478(2),c=7.074(1)Å,β=90.98(1) andZ=2. The structure was solved by the heavy-atom method, and least-squares refinement of structural parameters led to a conventionalR factor of 0.031 (R w=0.030) for 733 independent reflections. The compound exhibits discrete monometallic units with the 1,2,4-triazolium ion acting as modentate ligand. The structure consists of centrosymmetric units in which the platinum atom is coordinated in perfectly planar geometry by two nitrogen and two bromine atoms. The NH and NH2 group of the guanazolium unit are involved in intermolecular hydrogen bonds. Infrared bands are diagnostic of the coordination environments around the metal atoms.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Journal of chemical crystallography 22 (1992), S. 145-149 
    ISSN: 1572-8854
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract The title compound [C2H5N4S]4[Bi2Br10]; [HL]4[Bi2Br10] (L=2,5-diamino-1,3,4-thiadiazole) was prepared and characterized by means of X-ray, and IR measurements. The structure was solved by the heavy-atom method, and least-squares refinement of structural parameters led to a conventionalR factor of 0.036 (R w =0.032) for 2425 independent reflections. The crystal consists of a condensed [Bi2Br10]4− anion and four HL+ cations. The anion has three bromine atoms involved in hydrogen bonds with N-bonded H atoms; the nonprotonated nitrogen atom of the cation is involved in hydrogen bonds too. The metal atoms have distorted octahedral geometry.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    ISSN: 1432-2323
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: Résumé L'activité électromyographique de l'intestin grêle a été étudiée chez 28 patients ayant eu des interventions portant sur le l'estomac, les voies biliaires ou le pancréas et comportant une reconstruction avec une anse en Y. Chez huit de ces patients, l'intervention initiale pendant laquelle cette anse en Y avait été mopntée, datait de 1 à 5 ans (anse en Y dite “chronique”). Chez les 20 autres patients, les électrodes pour mesurer l'activité électrique ont été placées pendant l'intervention initiale (anse en Y dite “récente”). Les quatre phases du complexe moteur migrateur (CMM) ont été identifiées sur l'intestin et sur l'anse en Y. La durée du CMM a été de 82.4 ± 22.3 min chez les patients ayant une anse en Y “chronique”, et de 89.0 ± 25.1 min chez les patients ayant une anse en Y “récente”. Pendant l'alimentation, la courbe d'activité dite “d'alimentation” a remplacé les CMM dans le tube intestinal en entier, y compris l'anse en Y chez 16 des 21 enregistrements (76.2%) des patients ayant une anse en Y “chronique” et chez 27 des 32 (84.4%) enregistrements des patients ayant une anse en Y “récente”. La durée des courbes dites “d'alimentation” a été de 170 ± 34 min chez les patients avec une anse en Y “chronique” et de 154 ± 26 min chez les patients avec une anse en Y “récente”. Les résultats de cette étude indiquent que l'activité électromyographique des anses en Y est normale pendant le jeûne et pendant l'alimentation, et ce même plusieurs années après la confection d'une anse en Y.
    Kurzfassung: Resumen Se estudió la motilidad electromiográphica del tracto gastrointestinal de 28 pacientes sometidos a operaciones gástricas, biliares y pancreáticas con reconstrucción de tipo Roux-en-Y. El asa de Roux-en-Y fue construida 1–5 años antes del estudio en un grupo de ocho pacientes (Roux-en-Y crónica) y en otro grupo de 20 lose electrodos fueron implantados durante la operación (Roux-en-Y reciente). Se identificaron las cuatro fases del complejo motormigratorio en el tracto gastrointestinal, incluso en el asa de Roux-en-Y. La duración del CMM fue 82.4 ± 22.3 min en los pacientes con Roux-en-Y crónica y 89.0 ± 25.1 min en los pacientes con Roux-en-Y reciente. Con la ingesta de alimento se substituyó el CMM por el patrón postalimentación en la totalidad del tracto gastrointestinal incluso en el asa de Roux-en-Y, en 16 de los 21 registros (76.2%) de los pacientes con Roux-en-Y crónica y en 27 de los 32 registros (84.4%) de los pacientes con Roux-en-Y reciente. La duración del patrón postalimentacón fue 170 ± 34 min en los pacientes con Roux-en-Y crónica y 154 ± 26 min en los pacientes con Roux-en-Y reciente. Los hallazgos en este estudio indican que la actividad electromiográphica del asa de Roux-en-Y es normal durante las fases de ayuno o de alimentación, aún transcurridos muchos años de la confección del Roux-en-Y.
    Notizen: Abstract The electromyographic activity of the gastrointestinal tract was studied in 28 patients undergoing gastric, biliary, and pancreatic operations with reconstruction of the gastrointestinal tract with a Roux-en-Y limb. The Roux-en-Y limb was constructed 1 to 5 years before the study in 8 patients (chronic Roux-en-Y) and at the operation in which the electrodes were implanted in 20 patients (recent Roux-en-Y). All four phases of the migrating motor complex (MMC) were identified in the gastrointestinal tract, including in the Roux-en-Y limb. The duration of the MMC was 82.4 ± 22.3 min in the patients with chronic Roux-en-Y and 89.0 ± 25.1 min in the patients with recent Roux-en-Y. Food ingestion converted the MMC to the fed pattern in the entire gastrointestinal tract, including the Roux-en-Y limb in 16 (76.2%) of 21 recordings of the patients with chronic Roux-en-Y and in 27 (84.4%) of 32 recordings of the patients with recent Roux-en-Y. The duration of the fed pattern was 170 ± 34 min in the patients with chronic Roux-en-Y and 154 ± 26 min in the patients with recent Roux-en-Y. The findings of this study indicate that the electromyographic activity of the Roux-en-Y limb is normal during both fasting and fed states, even many years after the construction of the Roux-en-Y.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    ISSN: 1432-1971
    Schlagwort(e): Congenital aortic regurgitation ; Echocardiography ; Angiography
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Congenital aortic regurgitation is an extremely rare cardiac lesion. This is a case report of an infant with a severe degree of valve regurgitation due to absence of the noncoronary aortic cusp. We show the echocardiographic, angiographic, and surgical aspects of the case, emphasizing the importance of a precise anatomical diagnosis and the problems of early valve replacement.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Springer
    Lung 170 (1992), S. 249-265 
    ISSN: 1432-1750
    Schlagwort(e): Lung cancer ; Non-small cell lung cancer ; Small cell lung cancer ; Chemotherapy-Radiotherapy
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract This article describes the current approach to the systematic management of both small cell and non-small cell lung cancer (NSCLC). The treatment of stages I, II, and IIIa NSCLC is surgical resection. Although adjuvant chemotherapy in stage I disease offers no survival benefit, the role of adjuvant chemotherapy in stage II and IIIa NSCLC remains controversial. Results of pilot studies using neoadjuvant chemotherapy in stage IIIa NSCLC are encouraging and data from ongoing randomized trials are awaited with interest. For locally advanced NSCLC, chest irradiation remains the standard of care. However, the addition of systemic chemotherapy holds promise. The impact of cisplatin-based regimens on overall survival in stage IV NSCLC remains disappointing. The introduction of newer agents, such as 7-ethyl-10-[4-(1-piperidino)-1-piperidino] carbonyloxycamptothecin (CPT-11), a topoisomerase-I inhibitor, has shown early favorable results. Chemotherapy is the most important therapeutic modality in the management of small cell lung cancer because of this cancer's propensity for early dissemination. In limited stage small cell lung cancer, chest radiotherapy, particularly if used early and concurrently with chemotherapy, may improve survival, but at the expense of increased toxicity. The role of prophylactic brain irradiation remains controversial in limited-stage disease. Chemotherapy is also the most important treatment modality in extensive-stage disease, but its role is only palliative. Radiotherapy is reserved primarily for disease-related complications in patients in whom chemotherapy has failed.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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