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  • Electronic Resource  (54)
  • Polymer and Materials Science  (48)
  • Physics  (4)
  • Gastric cancer  (2)
  • Pathogenesis  (2)
  • 61.16.Bg  (1)
  • Acute gastric mucosal lesion (AGML)  (1)
Material
  • Electronic Resource  (54)
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 351 (1980), S. 267-276 
    ISSN: 1435-2451
    Keywords: Stenosis of papilla ; Pathogenesis ; Diagnosis ; Therapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Diagnostik der gutartigen Papillenstenose basiert auf der präoperativen endoskopisch retrograden Cholangio-Pankreaticographie (ERCP), der peroperativen Cholangiographie und Debimetrie mit diagnostischer Papillenbougierung. Die mit diesen Methoden erzielte hohe Trefferquote [14] berechtigt diese aufwendigen Verfahren konsequent anzuwenden. Die Therapie besteht bei der reversiblen Stenose in der Beseitigung des dafür verantwortlichen Entzündungsherdes (Cholecystolithiasis und Choledocholithiasis). Die irreversiblen Papillenstenosen sind ausschließlich durch Sphincterotomie bzw. Papillotomie erfolgreich zu behandeln.
    Notes: Summary The diagnostics of benign stenosis of the papilla is based on the preoperative endoscopic retrograde cholangiopancreatography (ERCP) and preoperative cholangiography and debimetry with diagnostic dilatation of the papilla. The high rate of positive results achieved with these difficult procedures necessitate their use. The therapy of reversible stenosis consists of the eradication of the responsible inflammatory focus (cholecystolithiasis and choledocholithiasis). Irreversible stenoses of the papilla are without exception successfully treated with sphincterotomy or papillotomy.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 359 (1983), S. 65-73 
    ISSN: 1435-2451
    Keywords: Vitamin-A ; Gastric cancer ; Chemical carcinogenesis ; Tumor promotion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In einer Untersuchung an 82 Wistar-Ratten wurden Carcinome des Drüsenmagens mit MNNG erzeugt. Ein Teil der Tiere erhielt zusätzlich hohe Dosen Vitamin A. Wir sahen eine statistisch signifikante Zunahme der Invasionstiefe und damit der Progression des Tumorstadiums unter Vitamin A-Einfluß. Die Häufigkeit des Auftretens von Tumoren war hingegen nicht signifikant verändert. Als Ursache des tumorfördernden Einflußes von Vitamin A in unserem Experiment ist vor allem sein labilisierender Effekt auf celluläre Membransysteme zu diskutieren: 1. Durch Zerstörung lysosomaler Membranen werden Enzyme, Cancerogene und Viren freigesetzt, die direkt oder indirekt zu einer Alteration der DNA führen. 2. Durch Schädigung der Zellmembranen geht die Kontaktinhibition verloren.
    Notes: Summary Carcinomas of the glandular stomach were induced in 82 Wistar rats by means of MNNG1. Part of the group also received high doses of Vitamin A. A consistently significant increase in depth of invasion, i. e. progression of the pathological tumor stage, was observed under the influence of Vitamin A. The frequency of tumor occurrence was not significantly altered. The labilizing effect of Vitamin A on cellular membrane systems is the probable mechanism of Vitamin A's tumor-promoting influence in our experiment: 1. By way of destruction of lysosomal membranes, enzymes, cancerogens, and viruses would be released, leading directly or indirectly to an alteration of the DNA. 2. Damage of cell membranes would lead to loss of the contact inhibition.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 358 (1982), S. 53-55 
    ISSN: 1435-2451
    Keywords: Gastric cancer ; Evaluation ; Technique ; Magenkrebs ; Bilanz nach 100 Jahren ; Taktik ; Technik
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Theodor Billroth konzipierte vor 100 Jahren die Technik der Magencarcinom-Resektion und zeitlos gültig die taktischen Prinzipien der radikalen kurativen Krebsoperation am Magen.
    Notes: Summary A hundred years ago Theodor Billroth devised the technique of gastric cancer resection and the perpetually valid tactical principles of radical curative gastric cancer surgery.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 368 (1986), S. 29-40 
    ISSN: 1435-2451
    Keywords: Sequelae of irradiation in intestinal tract ; Pathogenesis ; Clinical aspects ; Treatment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Behandlung unerwünschter Folgen einer Strahlentherapie am Darmtrakt ist durch die Zeit ein vielfältig schwieriges Problem geblieben. Wir berichten über Erfahrungen, die wir an einem Kollektiv von 285 Patienten gewonnen haben; von diesen wurden 159 (= 55,8%) operiert. Dominierende Indikationen waren Stenosen und entzündliche Veränderungen des Darmrohres sowie Fistelbildungen. Es verstarben 7 Patienten (= 4,4%). Die Ergebnisse lassen eine deutliche Minderung bislang bekannter Risiken erkennen.
    Notes: Summary The therapy of irradiation sequelae in the intestinal tract is still problematic. Within the period from 1967–1984 285 patients have been treated for late radiation injuries of the intestine. Our experiences are demonstrated and discussed with reference to the literature. Specific topics are: pathogenesis, clinical problems and aspects of conservative and operative treatment.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1434-6036
    Keywords: 79.20.Kz ; 61.46.+w ; 61.16.Bg
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The crystal and electronic structure of solidC 76 has been studied using transmission electron microscopy and electron energy-loss spectroscopy in transmission. C76 forms a close packed structure with an average facecentred cubic symmetry. From valence band and core electron excitations information on the dielectric function and the unoccupied density of states has been obtained.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 344 (1977), S. 141-155 
    ISSN: 1435-2451
    Keywords: Stress ulcer ; Acute gastric mucosal lesion (AGML) ; Gastric mucosal barrier-shock
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Das Stressulcus ist die akute Schleimhautläsion des oberen Intestinaltraktes, die im Rahmen einer Erkrankung oder deren Behandlung innerhalb von wenigen Tagen bei vorher magengesunden Patienten auftreten kann. Gefährdet sind Patienten mit großen Operationen, Verbrennungen und verschiedenen Formen des Schocks. Begünstigend wirken Komplikationen, wie respiratorische Insuffizienz, paralytischer Ileus und Infektionen. Das Durchschnittsalter beträgt 53 Jahre, Männer sind häufiger betroffen. Häufigster Manifestationsort ist der proximale Magen; seltener sind Duodenum und terminaler Oesophagus beteiligt. Makroskopisch finden sich meist multiple Erosionen und flächenhafte Ulcerationen, im Duodenum überwiegen die solitären Ulcera. Pathogenetisch sind im wesentlichen drei Faktoren beteiligt, die Salzsäure, eine schockbedingte Störung der Schleimhautmikrozirkulation und ein duodeno-gastraler Reflux von Gallensäuren und Lysolecithin. Häufigstes Symptom ist die Blutung, doch über 50% der Stressulcera verlaufen inapparent. 60–70% der Stressulcera kommen unter konservativen Maßnahmen zur Ausheilung. Unter den operativen Verfahren dominiert die Vagotomie in Kombination mit Umstechung oder Resektion. Zur Prophylaxe dienen eine Vermeidung von Schockzuständen und respiratorischer Insuffizienz, Magensaftdauerableitung, frühe orale Ernährung und intragastrale Applikation von Antacida und Cholestyramin.
    Notes: Summary Stress ulcer means an acute mucosal lesion of the upper gastrointestinal tract in sick patients, who have not had gastroduodenal ulcer before. Most often stress ulcers follow big operations, burns and different types of shock. Complications as respiratory insufficiency, paralytic ileus or infections favor the ulcer formation. The average age is 53 years, males are more often affected. The main localisation is the proximal stomach, less frequently the lesions are located in the duodenum and terminal oesophagus. The macroscopic type is an erosion or a superficial ulceration, a solitary ulcer is typically situated in the duodenum. From the view of pathogenesis three factors are mainly involved: hydrochlorid acid, a disturbance of microcirculation due to shock and a duodenogastric reflux of bile acids and lysolecithin. Most frequent symptom is upper gastrointestinal bleeding, but more than 50% are symptomless. Medical treatment is successful in 60–70%. The surgical treatment of choise is vagotomy in combination with circular sature or resection. Prevention of shock or respiratory insufficiency, permanent gastric suction, early food administration and intragastral application of antacids and cholestyramin are the essentials of stress ulcer prophylaxis.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 5 (1967), S. 555-568 
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A simple differential, isothermal calorimeter has been built to study the thermodynamics of interactions associated with a variety of polymer solution processes. The calorimeter is readily operated at temperatures ranging from ambient to about 200°C., temperature adjustments are rapid, and the apparatus is rugged enough to permit application to commercial process studies. Though less sensitive than microcalorimeters, it represents an attractive combination of satisfactory accuracy, speed, and flexibility of operation. The operation of the calorimeter is demonstrated by measurements of the heat of solution of sodium chloride in water and the heats of solution of various polyolefins in Tetralin and α-chloronaphthalene. The latter tend to confirm the presence of polymer aggregates in chloronaphthalene solutions below the thermodynamic melting temperature of the polymer.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 11 (1967), S. 1043-1053 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Time dependence in the melt indexing of polyolefins stabilized against thermally induced changes is well known, the prevalent effect being an increase in melt index toward a steady-state value. The melt index of polyethylenes compounded with carbon black has been found to decrease, in some cases radically, although oxygen uptake data show no evidence of thermal instability. The melt index-time plot can be restored to its normal shape by adding excess quantities of a standard thioether antioxidant. Data are rationalized by assuming that polyethylene adsorbs on the available pigment surface, forming a crosslink network. The thioether antioxidant, however, may adsorb preferentially, thereby restoring the normal response of the polymer to forces resulting in its capillary extrusion. The results emphasize the contribution of chain orientation effects to the time dependence of melt index.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 16 (1972), S. 539-543 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 20 (1976), S. 2663-2673 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Suzorite mica has been surface modified by microwave plasma treatment in ethylene gas. The surface-treated mica was used as a filler in polyethylene, polystyrene, and a mixture of these two polymers. Significant changes in rheological behavior ensue. These indicate that adhesion between polyethylene and irradiated mica is superior to that of interfaces using unirradiated mica. In contrast, ethylene irradiation reduces the ability of filled polystyrene compounds to store elastic energy in melt flow, an effect consistent with impaired adhesion at interfaces involving these components. An intermediate situation exists in the case of the two-polymer blend. The tensile properties of these systems also reflect surface treatment, reinforcement occurring in polyethylene-containing compounds, while the tensile properties of polystyrene composites deteriorate. Plasma-induced surface modifications of fillers to produce desired property changes in specified polymer matrixes are implied by the present work, but a fuller understanding of the chemistry of surface modification reactions is needed to substantiate these implications.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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