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  • 1
    Electronic Resource
    Electronic Resource
    Insulin and the glucose-glucagon feedback mechanism in the duck (1976)
    Springer
    Diabetologia 12 (1976), S. 23-33 
    Details
    ISSN: 1432-0428
    Keywords: Duck ; glucose-glucagon feedback mechanism ; glucagon ; insulin ; glucose
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The relationship between insulin and the glucose-glucagon feedback mechanism was studied by testing the effectiveness of various routes, doses and timing of insulin administration prior to and during a glucose tolerance test in Peking ducks made transiently diabetic by subtotal pancreatectomy. Insulin injections or infusions given either before, or only during the glucose load, did not restore the A-cell response to glucose. Yet, if given both before and during the glucose test, in conditions which mimic the physiological basal insulin level and its variations (with, initially, intramuscular injections of 0.2 IU/kg and 8 μg/kg glucagon, every six hours, and then an intravenous injection of 3.6 mU/kg plus an infusion of 0.9 mU/kg/ minute for one hour), the normal glucagon response to glucose was re-established. Insulin must therefore be present, both before and during glucose stimulation, for glucose to be effective as an A-cell suppressor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01221961
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of insulin on glucagon secretion mediated via glucose metabolism of pancreatic A cells in ducks (1981)
    Springer
    Diabetologia 21 (1981), S. 72-77 
    Details
    ISSN: 1432-0428
    Keywords: Glucose ; insulin ; glucagon ; glucose metabolism ; A cell ; 2-deoxyglucose ; subtotal pancreatectomy ; ducks
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A possible action of insulin via glucose metabolism on the pancreatic A cell response to glucose, was studied in ducks. 2-Deoxyglucose, a non-metabolizable analogue of glucose was used. In normal ducks, the hyperglycaemia induced by 2-deoxyglucose (IV: 0.5 g/kg) resulted in hyperglucagonaemia, while the same degree of hyperglycaemia, induced by glucose infusion (IV injection 25 mg/kg, and infusion 5 mg/kg/min) immediately suppressed glucagon secretion. In diabetic ducks, two days after subtotal pancreatectomy, glucose responsiveness of the A cell was abolished, but could be restored by insulin treatment before (IM 0.2 U/kg insulin+8 μg/kg glucagon every 6 h) and during (IV 3.6 mU/kg+infusion 0.9 mU/kg/min) the glucose test (IV: 0.5 g /kg). The normal response of the A cell to glucose was not observed in diabetic insulin-treated ducks after the administration of 2-deoxyglucose (IV: 0.5 g/kg). These data suggest an inhibitory effect of the metabolism of glucose on the release of glucagon. In addition, the action of insulin on the A cell may be mediated by its effect on glucose metabolism within the A cell.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01789118
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of insulin on glucagon secretion mediated via glucose metabolism of pancreatic a cells in ducks (1981)
    Springer
    Diabetologia 20 (1981), S. 72-77 
    Details
    ISSN: 1432-0428
    Keywords: Glucose ; insulin ; glucagon ; glucose metabolism ; A cell ; 2-deoxyglucose ; subtotal pancreatectomy ; ducks
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A possible action of insulin via glucose metabolism on the pancreatic A cell response to glucose, was studied in ducks. 2-Deoxyglucose, a non metabolizable analogue of glucose was used. In normal ducks, the hyperglycaemia induced by 2-deoxyglucose (IV: 0.5g/kg) resulted in hyper glucagonaemia, while the same degree of hyper glycaemia, induced by glucose infusion (IV injection 25 mg/kg, and infusion 5 mg/kg/min) immediately suppressed glucagon secretion. In diabetic ducks, two days after subtotal pancreatectomy, glucose responsiveness of the A cell was abolished, but could be restored by insulin treatment before (IM 0.2 U/kg insulin + 8 μg/kg glucagon every 6 h) and during (IV 3.6 mU/kg + infusion 0.9 mU/kg/min) the glucose test (IV: 0.5 g /kg). The normal response of the A cell to glucose was not observed in diabetic insulintreated ducks after the administration of 2-deoxyglucose (IV: 0.5 g/kg). These data suggest an inhibitory effect of the metabolism of glucose on the release of glucagon. In addition, the action of insulin on the A cell may be mediated by its effect on glucose metabolism within the A cell.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00253821
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Pancreatic castleman disease: CT findings (1994)
    Springer
    Abdominal imaging 19 (1994), S. 160-161 
    Details
    ISSN: 1432-0509
    Keywords: Pancreas ; Castleman disease ; CT
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Computed tomography findings in a case of pancreatic localization of Castleman disease are presented correlated with histological findings. This is the second observation in the literature of pancreatic involvement with an unusual histological form.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00203494
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  • 5
    Electronic Resource
    Electronic Resource
    A new approach to enhance growth and nodulation of Acacia mangium through aeroponic culture (1997)
    Springer
    Biology and fertility of soils 25 (1997), S. 7-12 
    Details
    ISSN: 1432-0789
    Keywords: Key words Aeroponic culture ; N2-fixation ; Acacia mangium ; Bradyrhizobium spp. ; Hypernodulation ; Tree saplings ; Imperata cylindrica
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract This work was designed to determine whether a plant culture method on non-solid media could be used as an alternative for inoculation of Acacia mangium with selected strains of Bradyrhizobium spp. A. mangium seedlings were grown and inoculated with Bradyrhizobium strain Aust13c and strain Tel2 in hydroponics, aeroponics and sand. Aeroponics was found to be the best system of the three, allowing the production of tree saplings 1 m in height after only 4 months in culture. Moreover, compared to plants grown in liquid or sand media, aeroponically grown saplings inoculated with Bradyrhizobium spp. developed a very high number of small nodules distributed all along the root system, resulting in an increase in nitrogen and chlorophyll content in plant tissues. We propose aeroponics as an alternative method to classical soil inoculation procedures for the production of hypernodulated legume tree saplings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003740050272
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  • 6
    Electronic Resource
    Electronic Resource
    Mediastinal lymphangioma in adults: CT and MR imaging features (2000)
    Springer
    European radiology 10 (2000), S. 1310-1314 
    Details
    ISSN: 1432-1084
    Keywords: Key words: Thorax ; Mediastinum ; Lymphangioma ; CT ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Adult mediastinal lymphangiomas are rare lesions the diagnosis of which is difficult based on imaging studies. A retrospective study of CT, MR, and pathologic findings of mediastinal lymphangioma was performed in order to correlate pathological and imaging findings. Nine cases of adult lymphangiomas were identified in the records of our institution over a 12-year period. The CT, MR, and pathologic findings were reviewed. Lesions were classified pathologically as unilocular, cavernous, and intermediate types. Pathologic examination identified six cases of unilocular lesion, two cases of cavernous type, and one intermediate type. The CT features (n = 9) included a smoothly marginated non-enhancing mass of water attenuation (n = 7), a non-enhancing mass of soft tissue attenuation (n = 1), and an enhancing multiseptated mass (n = 1). Lesions were located in the anterior mediastinum (n = 2), right paratracheal (n = 4), subcarinal (n = 1), aortopulmonic window (n = 1) areas, and below the left hilum extending into the posterior mediastinum (n = 1). The MR features (n = 3) were characterized by an enhancing multicystic and multiseptated appearance, evocative of a cavernous type in two cases. The CT appearance of mediastinal thoracic lymphangioma is variable depending on the pathologic type. The most common unilocular type is a non-enhancing thin-walled mass on CT. A less frequent cavernous type can be suggested based on a multiseptated and loculated mass on CT and/or MR examination.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003300000380
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  • 7
    Electronic Resource
    Electronic Resource
    Exogenous lipoid pneumonia: HRCT, MR, and pathologic findings (1999)
    Springer
    European radiology 9 (1999), S. 1190-1196 
    Details
    ISSN: 1432-1084
    Keywords: Key words: Lipoid pneumonia ; Diagnosis ; Lung ; Disease ; CT ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The objective of this study was to describe high-resolution CT (HRCT) and MR findings of exogenous lipoid pneumonia and to correlate them with pathologic findings. A retrospective review of the medical records of our institution revealed seven patients with a diagnosis of lipoid pneumonia based on clinical data, chest films, bronchoalveolar lavage, and follow-up. Both HRCT and MR imaging were reviewed by two readers. Pathologic examination of the resected specimen or surgical biopsies were also reviewed in the four available cases. The HRCT findings were pulmonary consolidations (n = 6) with fatty (n = 3) or unspecific but low attenuation values (n = 3), areas of ground-glass opacities (n = 5), septal lines, and centrilobular interstitial thickening (n = 5). In five of the seven cases, a crazy-paving pattern of various spread was also present, either isolated (n = 1) or surrounding a pulmonary consolidation. In two cases traction bronchiectasis and cystic changes consistent with fibrosis were seen. At MR imaging (n = 2) a pulmonary consolidation of high signal intensity on T1-weighted image consistent with lipid content was present in one case. Pathologic examination (n = 4) showed the coexistence of lobules with lesions of various ages, sometimes in contiguous lobules, within the same patient. Recent lesions were those with alveolar fill-in by spumous macrophages and almost normal alveolar walls and septae. In more advanced lesions, lobules were filled in with larger vacuoles often surrounded by inflammatory infiltrates of alveolar walls, bronchiolar walls, and septa. The oldest lesions were characterized by fibrosis and parenchymal distortion around large lipid-containing vacuoles. The HRCT findings reflect pathologic findings in exogenous lipoid pneumonia. Although non-specific, consolidation areas of low attenuation values and crazy-paving pattern are frequently associated in exogenous lipoid pneumonia and are indicative of the diagnosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003300050815
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  • 8
    Electronic Resource
    Electronic Resource
    Inflammatory myofibroblastic tumor of the lung (inflammatory pseudotumor): uncommon cause of solitary pulmonary nodule (1999)
    Springer
    European radiology 9 (1999), S. 1205-1207 
    Details
    ISSN: 1432-1084
    Keywords: Key words: Lung nodule ; CT ; Inflammatory pseudotumor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Lung inflammatory myofibroblastic tumor is an uncommon cause of solitary lung nodule (0.7 % of lung tumors). The principal site of inflammatory pseudotumor is the lung, but it can also occur elsewhere in various organs. Although benign, they may be locally very aggressive. Recurrent and multifocal forms have been described. Since they are likely to mimic malignant neoplasms, accurate histopathologic diagnosis is necessary in order to guide appropriate surgical excision and avoid aggressive treatments. We report a case of lung involvement in a young adult with radiologic and pathologic correlations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003300050818
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  • 9
    Electronic Resource
    Electronic Resource
    Radiological findings in nine AIDS patients with Rhodococcus equi pneumonia (1996)
    Springer
    European radiology 6 (1996), S. 826-830 
    Details
    ISSN: 1432-1084
    Keywords: AIDS ; Rhodococcus equi ; Mediastinal lymphadenopathy ; CT
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Rhodococcus equi (R. equi) infections have been incidentally reported as a cause of pulmonary infection in severely immunocompromised hosts, including AIDS patients. Our purpose is to describe the radiological findings in nine AIDS patients with R. equi pneumonia assessed by bronchoalveolar lavage (BAL), biopsies, cultures of sputum, and hemocultures. All patients were examined by chest radiographs and contrast-medium-enhanced chest CT. Dense pulmonary consolidations with or without cavitations accounted for the most striking radiological patterns. Chest CT also revealed six mediastinal involvements, strongly mimicking a lymphoma. Two of them had multiple bilateral pulmonary nodular opacities. Pleural effusion was not identified. Although intensive therapies were administered, seven among nine patients died within few months. In an AIDS patient living in a rural area or exposed to horses and presenting these radiological patterns, the possibility of R. equi pneumonia should be considered in the differential diagnosis along with other infectious diseases or lymphomas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00240680
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  • 10
    Electronic Resource
    Electronic Resource
    Mediastinal masses: diagnostic approach (1998)
    Springer
    European radiology 8 (1998), S. 1148-1159 
    Details
    ISSN: 1432-1084
    Keywords: Key words: Mediastinum ; CT ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. In most clinical situations the modern radiological approach to a mediastinal mass consists of performing a CT scan following the chest radiograph. Magnetic resonance imaging is indicated when CT findings are equivocal and as the first-line method in particular situations such as suspected involvement of the posterior mediastinum. In both techniques, tissular components of the mass assessed by density or signal intensity analysis, together with the precise location, are the leading edge of the radiological diagnosis. This review deals mainly with the differential diagnosis of primary neoplasms according to CT and MRI findings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003300050525
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