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  • 1
    Electronic Resource
    Electronic Resource
    Bone-like tissue growth in the root canal of immature permanent teeth after traumatic injuries (2000)
    Copenhagen : Munksgaard International Publishers
    Dental traumatology 16 (2000), S. 0 
    Details
    ISSN: 1600-0595
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract – Following a severe traumatic incident to permanent immature teeth, the growth of calcified tissue in the pulp space may occasionally occur. This calcified tissue may be diffuse or in intimate contact with the dentine. It has been suggested that a wide open apex, severe damage to the root sheath, and the absence of infection are only some of the predisposing factors leading to this metaplasia of pulp tissue into bone-like tissue. Five cases are described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1034/j.1600-9657.2000.016006298.x
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  • 2
    Electronic Resource
    Electronic Resource
    Direct detection of a microlens in the Milky Way (2001)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 414 (2001), S. 617-619 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The nature of dark matter remains mysterious, with luminous material accounting for at most ∼25 per cent of the baryons in the Universe. We accordingly undertook a survey looking for the microlensing of stars in the Large Magellanic Cloud (LMC) to determine the fraction of Galactic dark ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/414617a
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  • 3
    Electronic Resource
    Electronic Resource
    Constant infusion of epinephrine, but not bolus treatment, improves haemodynamic recovery in anaphylactic shock in dogs (2004)
    Oxford, UK : Blackwell Science Ltd
    Clinical & experimental allergy 34 (2004), S. 0 
    Details
    ISSN: 1365-2222
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Objective Epinephrine (Epi) is the treatment of choice for reversing cardiovascular collapse in anaphylactic shock (AS). In this condition, most treatment guidelines have been anecdotally derived and no randomized clinical trials have been conducted. In the present study, we examined the time course of haemodynamic recovery in a canine model of AS when Epi was administered at the initiation of allergen challenge before fully developed shock had occurred.Methods Randomized, controlled, crossover studies were performed approximately 3–5 weeks apart in ragweed-sensitized dogs while the animals were ventilated and anaesthetized. Epi was administered by bolus intravenous (i.v.), subcutaneous (s.c.), intramuscular (i.m.) routes and by continuous i.v. infusion (CI). The findings obtained in the Epi treatment (T) studies were compared with those found in a no treatment (NT) study. In the bolus studies, Epi was administered at 0.01 mg/kg, while in the CI study, the dose of Epi was titrated to maintain mean arterial pressure (MAP) at 70% of preshock levels. MAP, cardiac output (CO), stroke volume (SV), and pulmonary wedge pressure (Pwp) were determined over a 3 h period.Results In the CI study, haemodynamics (CO, MAP, and SV) were significantly higher than those measured in the NT study and the bolus studies over approximately the first hour of the study. In the CI study, the amount of Epi infused was significantly less than in the bolus studies.Conclusion When administered at the initiation of allergen challenge, bolus treatment of Epi by i.m., i.v., or s.c. routes caused limited haemodynamic improvement in AS. In contrast, constant infusion of Epi at a lower total dose produced significant haemodynamic improvement. Within the limits of this anaesthetized canine model, the results suggest that CI should be the preferred route in the treatment of AS when this treatment option is available.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2222.2004.02106.x
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  • 4
    Electronic Resource
    Electronic Resource
    Rockfalls triggered by the ad 1356 Basle Earthquake (2003)
    Oxford, UK : Blackwell Publishing Ltd
    Terra nova 15 (2003), S. 0 
    Details
    ISSN: 1365-3121
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: In the Basle region of Switzerland we demonstrate that rockfall blocks can be dated accurately using the radiocarbon method. Soil beneath rockfall blocks containing organic macro-remains was sampled at four cliff sites in the Tabular Jura south-east of Basle. A lightweight drilling rig drills a 101-mm-diameter hole through rockfall blocks up to 6 m in height. A downhole sampler is used to recover soil samples from below the blocks. Eighteen radiocarbon dates on charcoal, wood, needles of conifers and organic macro-remains from 11 blocks gave dates between 970 and 440 bp. Calibrated ages range between ad 1210 and ad 1450. These results, along with field observations and historical research, suggest that a large number of blocks toppled as rockfalls within a short time interval in the epicentral area of the ad 1356 Basle earthquake.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3121.2003.00496.x
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  • 5
    Electronic Resource
    Electronic Resource
    Conference on the occasion of the 20th anniversary of the Psychosocial Care Unit at the Surgical University Hospital Heidelberg Looking back into the future – experiences, viewpoints and prospects in psychosocial oncology 8–9 October 1999, Heidelberg, Germany (2000)
    Springer
    Journal of cancer research and clinical oncology 126 (2000), S. 301-304 
    Details
    ISSN: 1432-1335
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004320050347
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  • 6
    Electronic Resource
    Electronic Resource
    Determination of nitric oxide metabolites by means of the Griess assay and gas chromatography–mass spectrometry in the cavernous and systemic blood of healthy males and patients with erectile dysfunction during different functional conditions of the penis (2000)
    Springer
    Urological research 28 (2000), S. 364-369 
    Details
    ISSN: 1434-0879
    Keywords: Key words Nitric oxide metabolites ; Erectile dysfunction ; Griess reaction ; Gas chromatography ; Mass spectrometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Recent research implicated that the relaxation of cavernous arterial and trabecular smooth muscle – the crucial event in penile erection – is initiated by the release of nitric oxide (NO) from nerve terminals within the cavernous tissue as well as from the endothelia that line the lacunar spaces and the intima of penile arteries. The present study was undertaken to determine whether plasma levels of the NO metabolites nitrate (NO− 3) and nitrite (NO− 2) in the systemic and cavernous blood of male subjects change during different penile conditions, and whether there is a difference in the NO− 3 and NO− 2 levels of normal males and patients with erectile dysfunction (ED). Twenty-four potent adult male volunteers and 15 patients with ED were exposed to visual and tactile erotic stimuli in order to elicit penile tumescence and, in the group of healthy volunteers, rigidity. Whole blood was aspirated from the corpus cavernosum and the cubital vein, and NO− 3 and NO− 2 levels were determined in plasma aliquots by means of the Griess reaction and a method combining gas chromatography and mass spectrometry (GC-MS). The mean systemic and cavernous plasma NO3 −/NO2 − level in blood samples obtained from the healthy volunteers was 25–31 μM when determined by means of the Griess reaction and 37–41 μM when measured by GC-MS. Both approaches revealed that NO3 −/NO2 − levels in the peripheral and cavernous blood do not change appreciably during developing erection, rigidity and detumescence. Moreover, no significant differences were found between NO3 −/NO2 − plasma levels in the systemic and cavernous blood samples taken from the normal subjects and patients during penile flaccidity, tumescence and detumescence. Our results may reflect the fact that NO metabolism in the corpora cavernosa in the phases of penile tumescence and rigidity may account for only a minor fraction of local levels of NO3 − and NO2 −, which may also derive from exogenous sources. Moreover, the basal levels of NO metabolites in the blood flushing the lacunar spaces of the cavernous body in the state of developing erection could conceal any release of NO that may occur within the penile tissue. Thus, we conclude that the quantification of NO metabolites by means of advanced detection methods, such as GC-MS, is of no use in the workup of ED.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002400000141
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  • 7
    Electronic Resource
    Electronic Resource
    Zur Kenntnis des Selenphotoelements. V (1941)
    Springer
    The European physical journal 118 (1941), S. 695-705 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Es wird die Einwirkung von α-Strahlen auf normale Selenphotoelemente verfolgt mit der Absicht, mit diesen intensiven Energieträgern im wesentlichen diejenige Zone — Randschicht — zu erfassen, welche für die charakteristischen Eigenschaften dieser Leiter-Halbleitersysteme als verantwortlich betrachtet wird und deren strukturelle Ergründung fortgesetzte Aufgabe des Experiments ist. Es findet sich, daß die α-Strahlung selbst in der verwandten Stärke keine meßbare elektromotorische Wirkung besitzt, daß sie aber die Photowirkung in einer Weise herabsetzt, die einer zeitlich schnell fortschreitenden, nahe vollständigen und nicht rückgängigen Zerstörung der für die Photowirkung maß-gebenden Bedingungen gleichkommt. Die Ursache dieser Erscheinung liegt, soweit bisher geprüft, weder in Veränderungen der optischen Eigenschaften, noch in groben Modifikationsänderungen des Selens. Auch sind elektrische Veränderungen im Gesamtmaterial des Halbleiters offenbar von nicht wesentlichem Einfluß, da die Wirkung ausschließlich der α-Strahlung zukommt, während intensive γ-Bestrahlung vergleichsweise bedeutungslos bleibt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01348116
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  • 8
    Electronic Resource
    Electronic Resource
    Über die Lichtdurchlässigkeit des amorphen Selens (1944)
    Springer
    The European physical journal 122 (1944), S. 49-61 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Es wird die Lichtdurchlässigkeit von durch Kathodenzerstäubung hergestellten amorphen roten Selenschichten verschiedener Dicke im sichtbaren Gebiet und im anschließenden Ultrarot bis gegen 5 μ hin systematisch untersucht und ihre Abhängigkeit von der Temperatur zwischen − 150 und + 150° C verfolgt. Wenn auch die Genauigkeit der quantitativen Einzelergebnisse offenbar durch die Schwierigkeit der Dickenbestimmung und durch geringe, aus der Herstellungsweise der Schichten sich ergebende strukturelle Verschiedenheiten derselben beschränkt ist, so führt doch die mögliche einheitliche Zusammenfassung des umfangreichen Beobachtungsmaterials zu einer einwandfreien Kenntnis des durchschnittlichen Verhaltens des untersuchten Stoffes. Der festgestellte Temperatureinfluß besteht in einer mit abnehmender Temperatur erheblich steigenden Begünstigung der Durchlässigkeit nach kürzeren Wellen kin, während er im langwelligen Gebiet stark zurücktritt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01336787
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  • 9
    Electronic Resource
    Electronic Resource
    Zur Gehaltsbestimmung radioaktiver Lösungen (1941)
    Springer
    The European physical journal 118 (1941), S. 357-374 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Es wird ein auf kleinsten Gehalt noch weit unterhalb 0,01 mg Ra-Äquiv. anwendbares Verfahren zur raschen quantitativen Bestimmung von Ra, MTh und Ra Th in einem beliebigen Gemisch dieser Stoffe beschrieben und seine Leistungsfähigkeit und Zuverlässigkeit durch eine eingehende systematische Untersuchung nachgewiesen. Dasselbe besteht in einer kombinierten Anwendung von Emanations-undγ-Strahlmessungen an Lösungen unter Berücksichtigung der besonderen Verhältnisse, welche die Gegenwart von Thor-Emanation mit sich bringt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01364679
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  • 10
    Electronic Resource
    Electronic Resource
    Bildgebende Verfahren in der Diagnostik des Herzens (2000)
    Springer
    Der Radiologe 40 (2000), S. 103-110 
    Details
    ISSN: 1432-2102
    Keywords: Schlüsselwörter ; Kardiale Bildgebung ; Angiographie ; Nuklearmedizin ; Magnetresonanztomographie ; Computertomographie ; Key word ; Cardiac imaging ; Angiography ; Nuclear imaging ; Magnetic resonance tomography ; Computed tomography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Purpose: Cardiac imaging includes determination of the size and structure of the cardiac chambers, valves, great vessels and the coronary arteries, chamber and valvular function, myocardial perfusion, viability and metabolism. Material and methods: Chest roentgenography, angiography, echocardiography and nuclear imaging are commonly used but computed tomography and magnetic resonance imaging also offer a promising potential. Results: Coronary angiography is the gold standard in assessing coronary anatomy. Fast CT technologies such as electron-beam and multi-row-CT are promising non-invasive imaging modalities in the assessment of coronary artery disease. With intravascular ultrasound early stages of coronary atherosclerosis can be detected. For the assessment of myocardial perfusion and viability as well as cardiac function, scintigraphic methods are widely accepted. However, MRI methods have also reached a high degree of accuracy. Evaluation of chamber and valvular function is, due to its wide availability, the field of echocardiography. Conclusions: In clinical routine chest roentgenography, angiography, echocardiography and nuclear imaging are well established. The value of computed tomography and magnetic resonance imaging in the evaluation of coronary artery disease, myocardial perfusion, viability and metabolism is yet to be defined.
    Notes: Zusammenfassung Zielsetzung: Anforderungen an die kardiale Bildgebung sind die Darstellung der Anatomie der Herzhöhlen, Herzklappen, Koronararterien und der großen Gefäße, Parameter der Ventrikel- und Klappenfunktion, der Myokardperfusion, Myokardvitalität und des myokardialen Stoffwechsels. Material und Methode: In der Bildgebung kommen neben den etablierten Standardverfahren wie Röntgen, Angiographie, Echokardiographie und nuklearmedizinischen Methoden auch neuere Verfahren der Computer- und Magnetresonanztomographie zum Einsatz. Ergebnisse: Die Koronarangiographie ist der Goldstandard in der Darstellung des gesamten Koronarsystems. In der Diagnostik der koronaren Herzerkrankung zeigen schnelle CT-Verfahren wie die Elektronenstrahltomographie (EBT) und die Mehrzeilendetektor-CT (MDCT) Vorteile gegenüber der Kernspintomographie. Frühstadien der koronaren Arteriosklerose können nur mit dem intravaskulären Ultraschall (IVUS) erkannt werden. Nuklearmedizinische Methoden sind in der Untersuchung der Myokardperfusion und -vitalität etabliert. Mit der MRT scheint eine qualitative und quantitative Bestimmung der regionalen Perfusion, Funktion und Vitalität möglich zu sein. Die Untersuchung der linksventrikulären Funktion und der Herzklappen ist die Domäne der Echokardiographie. Schlussfolgerung: In der klinischen Routine sind die Angiographie, Echokardiographie und die Nuklearmedizin etablierte Methoden. Der Stellenwert der Magnetresonanz- und Computertomographie in der Diagnostik der koronaren Herzerkrankung und der Herzfunktion, Perfusion und Vitaltät ist noch nicht definiert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001170050017
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