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  • 1
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 67-68 (Apr. 1999), p. 119-124 
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0428
    Keywords: Keywords Circular dichroism ; collagen IV ; diabetes ; glycation ; nephropathy.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Glycation of basement membrane collagen IV has been implicated as a major pathogenetic process leading to diabetic microvascular complications. To evaluate the relevance of carbohydrate-induced modifications on collagen IV in diabetic nephropathy, we isolated the cross-linking domains 7S and NC1 from the glomerular basement membrane (GBM) of patients with diabetes mellitus. Modifications characteristic for glycated proteins were identified when the domains from diabetic kidney were compared with the same domains from human placenta as an unmodified control. In both domains a marked formation of inter-and intramolecular cross links could be demonstrated by SDS-PAGE. Furthermore circular dichroism studies showed a decrease in helicity of the 7S domain from human diabetic kidneys of 13 %, indicating denaturation already at room temperature. Thermal transition profiles, showing a shift of the denaturation temperature towards a lower temperature, with loss of a distinct second melting point, confirmed this observation. Our data provide further evidence for a possible role of protein-modification by glycoxidative reactions in the onset of diabetic nephropathy in vivo. [Diabetologia (1998) 41: 1073–1079]
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-0509
    Keywords: Key words: Gallbladder disease—Radiologic diagnosis—Adenomyomatosis.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Background: To demonstrate the radiologic–pathologic correlation of adenomyomatosis of gallbladder (GBA) and emphasize the role of high-resolution real-time ultrasound (RTUS) in the diagnosis of GBA. Methods: Ten (four male and six female, mean age = 49 years) patients with proven GBA (three diffuse, three segmental, and four fundal) diagnosed by histopathology or confirmed by oral cholecystography (OCG) were reviewed. Radiologic studies included OCG (n = 8), RTUS (n = 8), and computed tomography (CT; n = 4). Six patients subsequently underwent cholecystectomy. Results: Histopathologic correlation between pathologic specimens and OCG, RTUS, and CT was possible in six patients. The diagnostic criteria with ultrasound included numerous tiny intramural cysts containing echogenic foci with reverberation artifacts and associated segmental or diffuse gallbladder wall thickening. OCG with fatty meal demonstrated intramural diverticula. Localized fundal GBA was better visualized on RTUS and CT scan than on OCG. Conclusion: Accurate diagnosis of GBA may be made by either OCG or high-resolution RTUS preoperatively. CT scan may used as an alternative method to help make the diagnosis in equivocal cases.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1084
    Keywords: Key words: Liver metastases ; Interventional treatment modalities ; Alcohol injection ; Drug instillation ; Radiofrequency ablation ; Cryotherapy ; Laser-induced interstitial thermotherapy ; Regional chemoembolisation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The liver is the most common site of metastatic tumour deposits. Hepatic metastases are the major cause of morbidity and mortality in patients with gastrointestinal carcinomas and other malignant tumours. The rationale and results for interventional therapeutic techniques in the treatment of liver metastases are presented. For the treatment of patients with irresectable liver metastases, alternative local ablative therapeutic modalities have been developed. Technique and results of local interventional therapies are presented such as microwave-, radiofrequency (RF)- and ultrasound ablation, and laser-induced interstitial therapy (LITT), cryotherapy and local drug administration such as alcohol injection, endotumoral chemotherapy and regional chemoembolisation. In addition to cryotherapy, all ablative techniques can be performed percutaneously with low morbidity and mortality. Cryotherapy is an effective and precise technique for inducing tumour necrosis, but it is currently performed via laparotomy. Percutaneous local alcohol injection results in an inhomogeneous distribution in liver metastases with unreliable control rates. Local chemotherapeutic drug instillation and regional chemoembolisation produces relevant but non-reproducible lesions. Laser-induced interstitial thermotherapy (LITT) performed under MRI guidance results in precise and reproducible areas of induced necrosis with a local control of 94 %, and with an improved survival rate. Interventional therapeutic techniques of liver metastases do result in a remarkable local tumour control rate with improved survival results.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    European radiology 9 (1999), S. 1479-1487 
    ISSN: 1432-1084
    Keywords: Key words: Interventional MRI ; Interstitial therapy ; MR-guided laser-induced interstitial thermotherapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The rationale and results for interstitial therapies via interventional MRI in the treatment of tumors in various regions are presented. Different interstitial treatment techniques are presented based on varying technologies both for tumor ablation and treatment monitoring. Data are presented based on 335 patients, 29–84 years of age (mean age 59 years, 196 men and 139 women) with a total of 932 liver tumors, 16 head and neck tumors and 14 abdominal recurrent pelvic and lymphatic tumors. All lesions had been treated with MR-guided laser-induced interstitial thermotherapy (LITT) via 2516 laser applications and 1856 cannulations. Data in the literature are extremely varying depending on author experience, treatment technique, and the included patient material. In our patient material we were able to achieve a local tumor control of 96.7 % depending on the size of the tumorous lesion, the topographical relationship, and the applied laser parameters. The overall cumulative survival rate of patients with liver metastases was 45.74 months (median 40.97 months, 95 % confidence interval 31.42–50.52). The cumulative survival rate of the patient group with hepatic metastases of colorectal carcinoma was 42.71 months (median 39.33 months, 95 % confidence interval 33.26–45.37). In patients with head and neck tumors a relevant reduction in clinically relevant symptoms such as pain, swallowing disorders, or nervous compression was achieved in 11 of 15 patients treated with LITT. In 14 soft tissue tumors, such as pelvic tumor recurrence and lymph node metastases, a local tumor control was obtained in 68 % of lesions. Interstitial therapies under interventional MRI guidance, such as LITT, results in a high local tumor control with an improved survival rate.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 55 (1999), S. 165-171 
    ISSN: 1432-1041
    Keywords: Key words Type 2 diabetes ; Repaglinide ; Glibenclamide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract Objective: To compare the efficacy and safety of repaglinide, a novel oral prandial glucose regulator, with that of glibenclamide, an oral hypoglycaemic agent, in the treatment of patients with type 2 diabetes. Methods: This was a 14-week, double-blind, parallel-group trail in which a total of 195 type 2 diabetic patients treated with oral hypoglycaemic agents were randomized to receive either repaglinide, administered preprandially three times daily, or glibenclamide, given preprandially once or twice daily, as per manufacturer's recommendations. Results: By the end of the study, the 2-h postprandial blood glucose values were lower in the repaglinide group than in the glibenclamide group, with the difference approaching statistical significance (repaglinide, 8.1 (0.6) mol · 1−1 vs glibenclamide, 9.1 (0.6) mmol · 1−1; P = 0.07). There was no statistically significant difference in the mean blood glucose level at the end of the study between the two groups (repaglinide, 7.1 (0.5) mmol · 1−1 vs glibenclamide, 7.4 (0.5) mmol·1−1; P = 0.42), and baseline HbA1C values had decreased to the same degree in both the repaglinide [7.8% (0.1%) to 7.5% 0.1%)] and the glibenclamide groups [8.0 (0.1%) to 7.6 (0.1%)]. There are no significant differences between the repaglinide and glibenclamide treatment groups in the levels of fasting blood glucose, fructosamine, fasting C-peptide, insulin and proinsulin. Neither treatment group showed any clinically significant changes in blood lipid profiles. Repaglinide and glibenclamide were both well tolerated. No significant differences were observed between the two treatment groups with respect to adverse events, including hypoglycaemic episodes and weight change. No accumulation of repaglinide was apparent during the maintenance period. Conclusion: Repaglinide is as well tolerated as glibenclamide and is equally effective in the management of type 2 diabetes. Repaglinide may, however, offer an improvement in postprandial blood glucose control compared with glibenclamide, thereby helping to reduce the relative long-term risk of diabetic complications.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 51 (1996), S. 327-330 
    ISSN: 1432-1041
    Keywords: Key words Hormone replacement therapy; estradiol ; pharmacokinetics ; bioequivalence ; postmenopausal volunteers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract Objective: Bioavailability of estradiol delivered from a newly developed matrix-type transdermal therapeutic system (MTTS) was compared with that of the conventional reservoir-type system (RTTS). Both formulations have a nominal delivery rate of 50 μg per day of 17β-estradiol (E2). Plasma concentrations of E2 and estrone (E1) were determined at steady state during a 96-h application of each formulation to 34 postmenopausal volunteers, using a two-stage randomized two-period crossover design. Results: The MTTS proved to be equivalent to the RTTS with respect to the extent of E2 absorption. Due to differences in patch design and composition, the rate of absorption was different between the two systems, with less fluctuating E2 plasma levels during application of the matrix system. Local tolerability and adhesion of MTTS appeared to be better than those of the reservoir system.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für Rheumatologie 56 (1997), S. 76-79 
    ISSN: 0340-1855
    Keywords: Schlüsselwörter Nicht-steroidale Antirheumatika ; Endoskopie ; gastroduodenale Läsionen ; Piroxicam-β-Cyclodextrin ; Piroxicam ; Key words Non-steroidal ; anti-inflammatory drugs ; endoscopy ; gastroduodenal damage ; piroxicam-β-cyclodextrin ; piroxicam
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung An 32 männlichen Freiwilligen wurde die gastroduodenale Verträglichkeit von Piroxicam-β-Cyclodextrin und Piroxicam im Rahmen einer doppelblind und parallel durchgeführten Studie geprüft. Piroxicam-β-Cyclodextrin und Piroxicam wurden in einer Tagesdosis von je 20mg über insgesamt 14 Tage verabreicht. Der Schleimhautbefund an Magen und Duodenum wurde endoskopisch bei Eintritt in die Studie sowie nach 14-tägiger Tabletteneinnahme untersucht. Die Schleimhautveränderungen wurden mittels eines modifizierten Schädigungs-Scores nach Lanza eingestuft. Piroxicam-β-Cyclodextrin erwies sich in dieser Untersuchungsreihe als signifikant besser verträglich als die Muttersubstanz Piroxicam. So zeigte sich ein Gesamtschädigungs-Score unter Piroxicam-β-Cyclodextrin nach 14 Tagen von 3±4 (Median 1) und unter Piroxicam einer von 6±4 (Median 8). Die Score-Werte ausschließlich für den Magen lauteten für Piroxicam-β-Cyclodextrin 2±3 (Median 1) und für Piroxicam 4±3 (Median 6). Die entsprechenden Werte für das Duodenum waren 2±4 (Median 0) sowie 4±5 (Median 0) (n.s.). Beide Medikamente wurden insgesamt gut vertragen. Zusammenfassend läßt sich sagen, daß eine alleinige morgendliche Gabe von 20mg Piroxicam-β-Cyclodextrin über 14 Tage die Magen- und Duodenalschleimhaut signifikant weniger schädigt als 20mg der Muttersubstanz Piroxicam.
    Notes: Summary The gastroduodenal tolerability of piroxicam-β-cyclodextrine was evaluated in a double-blind, parallel group study in 32 healthy male volunteers. The doses used were 20mg piroxicam-β-cyclodextrin vs 20mg piroxicam daily over a period of 14 days. Gastric tolerability was assessed by using upper endoscopy. Gastroscopy was performed at base-line and after the dosing period of 14 days. The mucosal lesions were scored using modified Lanza criteria. In comparison to piroxicam, piroxicam-β-cyclodextrine was significantly better tolerated after a 14 day dosing period. Mean gastric-duodenal score: Piroxicam-β-cyclodextrine 3±4 (median 1), piroxicam 6±4 (median 8). The score values for the stomach were for piroxicam-β-cyclodextrin 2±3 (median 1) and for piroxicam 4±3 (median 6). The corresponding values for the duodenal bulb 2±4 (median 0) and 4±5 (median 0), respectively. Both drugs averaged were generally well tolerated. In summary, piroxicam-β-cyclodextrin given as a 20mg single oral morning-dose over a 14-day period was significantly better tolerated than piroxicam 20mg with regard to gastroduodenal damage.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 1911-1916 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Epitaxial growth of PbSe on (111)- and (100)-oriented Si substrates without an intermediate buffer layer is studied. It is found that on Si(111) the orientation of the IV-VI layer can by varied from (100) at 200 °C to (111) at 400 °C substrate temperature. On Si(100), only (100)-oriented layers were obtained for the whole temperature range. (100)-oriented layers with thicknesses above 0.5 μm were cracked due to thermally induced mechanical strain on cooldown to room temperature. This strain cannot be relaxed by dislocation glide in the first glide systems as it is the case for (111)-oriented layers. The structural quality of (100)-oriented PbSe layers on Si(100) and Si(111) is inferior compared to layers grown with an intermediate BaF2/CaF2 or CaF2 buffer layer. This implies that the covalent/ionic PbSe/Si interface seems to impede high-quality epitaxy, contrary to the well known ionic/ionic IV-VI/IIa-fluoride interface. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 66 (1995), S. 2570-2573 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The x-ray transmission properties of a very thin polyimide window in the range 7–310 A(ring) have been investigated. The window is nominally 0.24 μm thick and is supported by a hexagonal polyimide grid. Transmission of over 60% and 80% at the oxygen Kα and carbon Kα lines, respectively, have been achieved. The use of such windows as the entrance window of a gas scintillation counter (GSPC) operating as a broadband spectrometer at XUV wavelengths is discussed. Overall detector efficiencies of greater than 10% for wavelengths less than 150 A(ring) are possible to achieve. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
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