| 1. |
- Sorensen, S.L., et al.
(författare)
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A normal-incidence beam line at the MAX storage ring
- 1990
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Ingår i: Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. - 0168-9002. ; 297:1-2, s. 296-300
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Tidskriftsartikel (refereegranskat)abstract
- A 1-m normal-incidence monochromator has been designed and installed on a bending-magnet beam line at the MAX storage ring in Lund. The optical properties of the beam line have been investigated via ray-tracing studies and with flux measurements of the beam line-monochromator combination. A resolution of 0.9 Å at 919.8 Å was measured in first-order diffraction with an argon hollow-cathode lamp for slit openings of 100 μm. A photon flux of 2.0 × 1010 at 550 Å with 250 μm slits was measured with a calibrated GaAs photodiode through a 1.5-mm diameter aperture in an aluminum mask on the photodiode. The new instrument has a microcomputer controlled mechanism which optimizes focussing requirements for a scanning monochromator with the requirement of fixed slits and fixed exit beam.
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| 2. |
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| 3. |
- 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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| 4. |
- 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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| 5. |
- 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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| 6. |
- Henriksson, Anders E., et al.
(författare)
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Upper gastrointestinal bleeding. With special reference to blood transfusion.
- 1991
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Ingår i: European Journal of Surgery. - 1102-4151 .- 1741-9271. ; 157:3, s. 193-6
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Tidskriftsartikel (refereegranskat)abstract
- Upper gastrointestinal haemorrhage in 978 unselected patients during a 9-year period was reviewed in regard to incidence, diagnosis, treatment and mortality rate. The annual incidence was 1/1,000 of the catchment population. The source of bleeding was established in 89% of cases. Peptic ulcer accounted for 53% of total admissions. Blood transfusion was given only when the haemoglobin was less than 8.0 g/dl or if the patient was in shock. Emergency surgery was performed on only 31 patients (3%). The perioperative mortality was 13% and the overall mortality 6%. It is concluded that current treatment policy resulted in low rates of operation and mortality in these unselected cases of upper gastrointestinal haemorrhage. The results support the theory that a hypercoagulable state in gastrointestinal bleeding is counteracted by citrated stored blood.
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| 7. |
- Holgersson, J, et al.
(författare)
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Glycolipid- and glycoprotein-based blood group A antigen expression in human thrombocytes. A1/A2 difference.
- 1990
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Ingår i: Glycoconjugate journal. - 0282-0080. ; 7:6, s. 601-8
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Tidskriftsartikel (refereegranskat)abstract
- Total non-acid glycolipid fractions and total sodium dodecylsulphate (SDS) solubilized protein fractions were isolated from human thrombocytes obtained from single human donors having different blood group A1/A2 phenotypes. The blood group A glycolipid antigens were characterized by immunostaining of thin layer plates with different monoclonal anti-A antibodies. The glycoproteins carrying blood group A epitopes were identified by SDS-PAGE and Western blot analysis using a monoclonal anti-A antibody. Blood group A glycolipid antigens were found in both A1 and A2 thrombocytes but the A2 individuals expressed at least ten times less A glycolipids compared to the A1 individuals. Expression of A type 3/4 chain and small amounts of A type 1 chain glycolipids were seen in thrombocytes of both A1 and A2 individuals, while the type 2 chain A glycolipids appeared to be missing from the A2 thrombocytes. Blood group A reactive glycoproteins were only found in thrombocytes of A1 individuals and could not be detected in A2 individuals or a blood group O individual. The major blood group A glycoprotein were found as a double band migrating in the 130 kDa region.
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| 8. |
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