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- Dunji, B. S., et al.
(författare)
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Green banana protection of gastric mucosa against experimentally induced injuries in rats
- 1993
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Ingår i: Scandinavian Journal of Gastroenterology. - : Informa UK Limited. - 0036-5521 .- 1502-7708. ; 28:10, s. 894-898
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Tidskriftsartikel (refereegranskat)abstract
- The protective capacities of fresh green (unripe) sweet bananas and of phosphatidylcholine and pectin (banana ingredients) against acute (ethanol- or indomethacin-induced) and chronic (indomethacin-induced) gastric mucosal lesions were evaluated in rats. Banana pulp was mixed with saline and given by gavage, as a pretreatment in a single dose. The identical protocol was used for pectin and phosphatidylcholine solution, and the dosages were adjusted to equal the amount of ingredients in the banana mixture, but higher concentrations were also given. The banana suspension reduced acute lesions, as did pectin and phosphatidylcholine in higher concentrations, but in concentrations as in fresh fruit no protective effects were observed except by pectin against indomethacin injury. In the model of chronic ulcers the banana suspension provided an incomplete and temporary protective effect. We conclude that the protective capacity of fresh green sweet bananas cannot be confined to only one active component. Pectin and phosphatidylcholine may protect gastric mucosa by strengthening the mucous-phospholipid layer, but the mechanism of protection afforded by bananas has to be further elucidated.
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- Dunjić, B. S., et al.
(författare)
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The rat gastric phospholipids : Increased in ulcerated mucosa and decreased after healing
- 1993
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Ingår i: European Surgical Research. - : S. Karger AG. - 0014-312X .- 1421-9921. ; 25:6, s. 376-382
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Tidskriftsartikel (refereegranskat)abstract
- The composition and content of the gastric phospholipids were followed during development and healing of indometha-cin-induced chronic, antral ulcers in rats. The individual phospholipids were identified by thin-layer chromatography and quantitatively estimated by spectrophotometric analysis of phosphate. No changes were found in phospholipid composition and content after a 24-hour fast or during the first 24 h after indomethacin was given. The total phospholipid content and the content of lysophosphatidylcholine and phosphatidylcholine were increased on the 5th day, when chronic ulcers were established. After 4 weeks, when the ulcers were healed, the total phospholipid content, and content of phosphatidylcholine, phosphatidylethanolamine and phosphatidylinositol, respectively, were decreased, while the content of lysophosphatidylcholine was increased. In conclusion, the composition and content of gastric phospholipids were altered in rats with ulcers as well as in rats with healed ulcers.
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- Glans, Peter, et al.
(författare)
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Determination of the lifetime width of the argon L1-hole state
- 1993
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Ingår i: Physical Review A (Atomic, Molecular, and Optical Physics). - 1050-2947. ; 47:2, s. 1539-1542
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Tidskriftsartikel (refereegranskat)abstract
- The width of the argon 2s level was experimentally obtained from x-ray emission-spectroscopy (2.25+/-0.15 eV) and x-ray photoelectron-spectroscopy (XPS) (2.25+/-0.05 eV) measurements. A theoretical value of 1.85 eV was obtained by a Green's-function calculation. A high-energy satellite located 2.7+/-0.2 eV above the L1-M2,3 x-ray emission transition was confirmed and identified as the 2s(-1)3p-1-->3p-2 double-hole transition. The XPS measurement of the argon 2s ionization energy gave a value of 326.25(5) eV.
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- Henriksson, Anders E., et al.
(författare)
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Hypercoagulability in acute bleeding peptic ulcer disease assessed by thrombin-antithrombin III concentrations.
- 1993
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Ingår i: European Journal of Surgery. - 1102-4151 .- 1741-9271. ; 159:3, s. 167-9
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE: To find out whether patients with acute bleeding peptic ulcers have hypercoagulable blood.DESIGN: Prospective open study.SETTING: District hospital in Sweden.SUBJECTS: 54 consecutive patients with duodenal ulcer (n = 25) and gastric ulcer (n = 29) admitted with haematemesis or melaena, or both.INTERVENTIONS: Diagnosis verified on admission by endoscopy, and healing was examined at follow up. Consumption of non-steroidal anti-inflammatory drugs, and smoking habits, were recorded.MAIN OUTCOME MEASURES: Coagulation of the blood monitored by concentrations of plasma thrombin-antithrombin III (TAT) complex in samples obtained on admission for the acute bleeding episode and at follow up 1-2 months later.RESULTS: The plasma TAT complex concentrations were raised during the acute bleeding episode (p < 0.001) compared with an age matched reference group. The TAT complex concentrations measured at follow up had returned to the reference range in all patients, whether or not their ulcers had healed.CONCLUSION: The results indicate that patients with acute haemorrhage from peptic ulcers have hypercoagulable blood during the acute episode.
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- Henriksson, Anders E., et al.
(författare)
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Time course of clotting and fibrinolytic markers in acute upper gastrointestinal bleeding : relation to diagnosis and blood transfusion treatment.
- 1993
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Ingår i: Blood Coagulation and Fibrinolysis. - 0957-5235 .- 1473-5733. ; 4:6, s. 877-80
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Tidskriftsartikel (refereegranskat)abstract
- One hundred consecutive patients with acute upper gastrointestinal bleeding were investigated. Blood coagulation and fibrinolytic activity were monitored by levels of plasma thrombin-antithrombin III (TAT) complex and plasmin-alpha 2-antiplasmin (PAP) complex in samples obtained from patients at admission with haematemesis and/or melana and in samples obtained from patients the first day after admission. Blood was transfused according to a restrictive policy. Median plasma TAT complex was significantly elevated both at admission and on the first day after admission compared with a reference group. Plasma PAP complex levels were normal at admission but decreased on the first day after admission. This decrease was independent of blood transfusion. The results indicate hypercoagulability at admission among patients with upper gastrointestinal haemorrhage reinforced by the development of a hypofibrinolytic state during the first day after admission. Restricted blood transfusion was not associated with any detectable change in blood coagulation or fibrinolysis in these patients.
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