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  • 1
    Electronic Resource
    Electronic Resource
    A system to study the stability of the wires of multiwire proportional chambers exposed to a 10 G time variable force field (1991)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 62 (1991), S. 2022-2025 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We report the results of a system to test the behavior of the wires of multiwire proportional chambers (MWPC) exposed for 10 min to a uniform force field of about 10 G strength and variable in time in the frequency range 0–2000 Hz. This acceleration will be present when the chambers, mounted inside a cosmic ray spectrometer, are launched by the Space Shuttle towards the NASA Space Station "FREEDOM.'' We have reproduced these conditions in the laboratory by an electronic device and we have found that, after repeated cycles of this treatment, the wire performance remained unchanged. This system can also be used to control the tension of the wires of a MWPC during its normal testing procedure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1142358
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  • 2
    Electronic Resource
    Electronic Resource
    Electrocatalytic Properties of Ni-Zr Based Amorphous and Nanocrystalline Alloys (1996)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 235-238 (Oct. 1996), p. 911-916 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/02/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.235-238.911.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    The Auxiliary Electrode for TiCl〈sub〉2〈/sub〉 Electrolysis Design of Anodes (1991)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 73-75 (Jan. 1991), p. 457-464 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/21/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.73-75.457.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Non-small-cell lung cancer: detection of mediastinal lymph node metastases by endoscopic ultrasound and CT (1996)
    Springer
    European radiology 6 (1996), S. 19-24 
    Details
    ISSN: 1432-1084
    Keywords: Computed tomography studies ; Endoscopic ultrasonography ; cancer ; Mediastinum Neoplasms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In this prospective study endoscopic ultra-sound (EUS) and computed tomography (CC) were evaluated to compare diagnostic accuracy of the two methods. They were performed for nodal staging in selected patients admitted to our institution for non-small-cell lung cancer (NSCLC). from February 1992 to July 1993. 45 patients were recruited for the study When N3 and N2 nodal involvement were excluded on standard chest X-ray. All the patients completed EUS TS and CT exams for staging before treatment. The results of sensitivity, specificity and accuracy were obtained in 30 patients who underwent surgical treatment with macroscopically radical resection of T and N. which allowed a complete surgical and histological comparison of CT and EUS findings. On a her-patient basis CT results were: sensitivity 63.0%. specificity 78.9 % and accuracy of 73.3 on a nodal station basis sensitivity: specificity and accuracy were 70.0%, 85.1% and 81.6% respectively. The EUS evaluation showed, on a per-patient basis, values of sensitivity 45.5%. specificity and overall diagnostic accuracy of 53.3%. On I nodal station basis the results were 50.0%,and 78.2% respectively. The results obtained in the 30 patients when both techniques were taken in association regarding sensitivity (90.9%), sspecificity (73.7%) and accuracy (80.0%) on a per-patient basis suggest that the assocation of EUS and CT offers the best approach for preoperative e staging of NSCL.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00619947
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  • 5
    Electronic Resource
    Electronic Resource
    Diagnosis and treatment of diverticular disease (1999)
    Springer
    Surgical endoscopy and other interventional techniques 13 (1999), S. 430-436 
    Details
    ISSN: 1432-2218
    Keywords: Key words: Consensus development conference — Diverticulitis — Contrast enema — Hartmann resection — Laparoscopic colectomy — Intraabdominal infections
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: With the aim of resolving the current controversy over the diagnosis and treatment of diverticular disease, this consensus development conference set out to summarize the actual state of the art. Methods: A multidisciplinary panel of international experts (n= 16) was selected to take part in the consensus process. Prior to the conference, all experts were asked to answer a series of questions on diverticular disease. The consensus statement compiled out of these evaluations was modified during a joint meeting of the panel members, then presented for discussion in a public session, and finally revised by the expert panel. The finalized statement was mailed to all panel members for approval (Delphi method). Results: Asymptomatic diverticulosis, diverticular disease (with actual or recurrent symptoms), and complicated diverticular disease were defined separately. No agreement was reached on whether barium enema or colonoscopy is the better choice as an initial diagnostic tool in uncomplicated cases. In complicated cases, computed tomography is recommended for diagnosis. After two attacks of diverticular disease, elective resection should be considered. For patients in whom a concomitant carcinoma cannot be excluded and those with chronic complications (fistula, stenosis, or bleeding) surgery is also indicated. Laparoscopic sigmoid colectomy is recommended only for uncomplicated and, after percutaneous drainage of abscesses, Hinchey stage I and II cases. Conclusions: Laparoscopic surgery has already begun to influence the management of diverticular disease, but the randomized controlled trials needed to support therapy decisions are largely missing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004649901007
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  • 6
    Electronic Resource
    Electronic Resource
    Small-cell carcinoma of the esophagus (1990)
    Springer
    Surgical endoscopy and other interventional techniques 4 (1990), S. 118-121 
    Details
    ISSN: 1432-2218
    Keywords: Esophageal small-cell carcinoma ; Endoscopic treatment ; Nd: YAG laser therapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A case of primary carcinoma of the esophagus is presented that consisted of poorly differentiated small-cell carcinoma. The patient underwent endoscopic treatment, first with an Nd: YAG laser and, finally, with bougienage and the insertion of a prosthesis in order to relieve dysphagia and improve the nutritional status and quality of life. Even though it is generally uncommon for laser therapy to be chosen as a primary mode of treatment, the results obtained should permit to overcome this lack of confidence in the choice of laser treatment for small-cell carcinoma of the esophagus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00591274
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  • 7
    Electronic Resource
    Electronic Resource
    Diagnosis and treatment of common bile duct stones (CBDS) (1998)
    Springer
    Surgical endoscopy and other interventional techniques 12 (1998), S. 856-864 
    Details
    ISSN: 1432-2218
    Keywords: Key words: Common bile duct stones — Gallbladder — Bile duct calculi — Laparoscopic cholecystectomy — Endoscopic retrograde cholangiopancreaticography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: Common bile duct stones (CBDS) are a frequent problem (10–15%) in patients with symptomatic cholecystolithiasis. Over the last decade, new diagnostic and surgical techniques have expanded the options for their management. This report of the Consensus Development Conference is intended to summarize the current state of the art, including principal guidelines and an extensive review of the literature. Methods: An international panel of 12 experts met under the auspices of the European Association of Endoscopic Surgery (EAES) to investigate the diagnostic and therapeutic alternatives for gallstone disease. Prior to the conference, all the experts were asked to submit their arguments in the form of published results. All papers received were weighted according to their scientific quality and relevance. The preconsensus document compiled out of this correspondence was altered following a discussion of the external evidence made available by the panel members and presented at the public conference session. The personal experiences of the participants and other aspects of individualized therapy were also considered. Results: Our panel of experts agreed that the presence of common bile duct stones should be investigated in all patients with symptomatic cholecystolithiasis. Based on preoperative noninvasive diagnostics, either endoscopic retrograde cholangiopancreaticography (ERCP) or intraoperative cholangiography should be employed for detecting CBDS. Eight of the 12 panelists recommended treating any diagnosed CBDS. For patients with no other extenuating circumstances, several treatment options exist. Stones can be extracted during ERCP, or either before or (in exceptional cases) after laparoscopic or open surgery. Bile duct clearance should always be combined with cholecystectomy. Evidence for further special aspects of CBDS treatment is equivocal and drawn from nonrandomized trials only. Conclusions: The management of common bile duct stones is currently undergoing some major changes. Many diagnostic and therapeutic strategies need further study.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004649900729
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  • 8
    Electronic Resource
    Electronic Resource
    Self-expanding tracheobronchial stents using flexible bronchoscopy (1994)
    Springer
    Surgical endoscopy and other interventional techniques 8 (1994), S. 411-413 
    Details
    ISSN: 1432-2218
    Keywords: Self-expanding tracheobronchial stents ; Flexible bronchoscopy ; Clinical experience
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Endoscopic insertion of tracheobronchial stents is indicated to achieve patency of the airway in case of malignant or benign obstructing lesions. Until now, the placement of prostheses has required a rigid bronchoscope with specially designed insertion instruments. Self-expanding stents are currently used to treat stenoses of different hollow organs (vessels, urinary tract, gastrointestinal tract, bile duct, respiratory tract). We report the first case of a self-expanding stent implanted in the trachea and right main stem bronchus using flexible videobronchoscope under local anesthesia. The procedure was easy, safe, effective, and well tolerated. No complications occurred.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00642444
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  • 9
    Electronic Resource
    Electronic Resource
    The Comparative Effects of Subchronic Administration of Triphenyltin Acetate (TPTA) on the Hepatic and Renal Drug-Metabolizing Enzymes in Rabbits and Lambs (1997)
    Springer
    Veterinary research communications 21 (1997), S. 117-125 
    Details
    ISSN: 1573-7446
    Keywords: cytochrome ; enzymes ; kidney ; liver ; rabbit ; sheep ; toxicity ; triphenyltin ; tin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Nebbia, C., Dacasto, M., Ceppa, L., Gennaro Soffietti, M., Spinelli, P., Bergo, V. and Di Simplicio, P., 1997. The comparative effects of subchronic administration of triphenyltin acetate (TPTA) on the hepatic and renal drug-metabolizing enzymes in rabbits and lambs. Veterinary Research Communications, 21 (2), 117-125 The purpose of this study was to determine whether subchronic (70 days) oral exposure to moderate to high levels of triphenyltin acetate (TPTA), an organotin derivative used worldwide, would affect the microsomal hepatic and renal drug-metabolizing enzymes in rabbits and lambs. Rabbits were offered a diet containing 0, 15, 75 or 150 ppm TPTA, while lambs were daily given 0, 1.5 or 7.5 mg TPTA per kg bw. The tin content in the liver and kidneys was measured by atomic absorption spectrophotometry. In the rabbits' livers, TPTA failed to affect the cytochrome P450 content, or the oxidative, hydrolytic (carboxylesterase) or conjugative (UDPG-transferase) enzyme activities studied. In contrast, a striking dose-related increase in both P450 content and carboxylesterase activity (up to 280%) was detected in the rabbits' kidneys, but the ECOD and EROD activities were respectively unchanged or moderately depressed. None of the enzymes studied showed statistically significant changes in the ovine hepatic or renal subfractions. The results suggest that repeated exposure to TPTA could lead to the induction of a particular P450-isoenzyme in rabbit kidneys which is concerned with the metabolism of endogenous compounds (e.g. steroids, prostaglandins, thromboxanes). The lack of significant tissue- and species-related differences in the concentration of tin supports the hypothesis that the changes observed in the rabbits' kidneys may not have been caused solely by the accumulation of the metal in the tissues.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005761302088
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