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  • 1
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 94 (1991), S. 1970-1975 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Collisions of excited 113Cd(5 3P1) atoms with various molecular gases (N2, H2, D2, CO, CO2, CH4, C2H6, C2H4, O2) have been investigated using atomic fluorescence spectroscopy. By selective excitation of a hyperfine structure level with a pulsed dye laser and studying the time dependence of the fluorescence signals as a function of the buffer gas density the cross sections for quenching, fine structure transfer, and hyperfine structure transfer could be obtained. For N2 molecules the collisions can be described by a decoupling model as has been shown previously for the noble gases as collision partners.
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  • 2
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Chlamydiae possess a genus-specific epitope that is located on the lipopolysaccharide (LPS) and is composed of a 3-deoxy-d-manno-octulosonic acid (Kdo) trisaccharide of the sequence αKdo-(2→8)–αKdo–(2→4)-αKdo. In Chlamydia trachomatis, this trisaccharide is biosynthetically generated through the action of a multi-functional Kdo-transferase encoded by the gene gseA. gseA of Chlamydia psittaci 6BC was cloned and expressed in a rough mutant (Re chemotype) of Escherichia coli (strain F515) that contains an LPS with only two α2→4-linked Kdo residues. Recombinant strains were able to add the immunodominant Kdo residue in a α2→8-linkage to the parental LPS, as determined by SDS–PAGE and Western blot analysis using a monoclonal antibody against the genus-specific epitope. The DNA sequence of gseA was determined and aligned to that published recently for C. trachomatis serovar L2. Most surprisingly, the two deduced amino acid sequences shared only an overall homology of 67%. Thus, gseA exhibits species specificity at the DNA level, whereas its gene product results in the synthesis of a carbohydrate antigen with genus specificity.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    European journal of orthopaedic surgery & traumatology 4 (1994), S. 143-148 
    ISSN: 1432-1068
    Keywords: Ligament croisé antérieur ; Résultats cliniques ; Contrôle de qualité ; Mesure instrumentale de la laxité ; Evaluation isocinétique de la fonction musculaire ; Anterior cruciate ligament ; Clinical scores ; Quality control ; Instrumented laxity testing ; Isokinetic muscle force
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary An objective functional evaluation after acute repair of unilateral anterior cruciate ligament (ACL) rupture was performed in a homogeneous group of 37 patients at a mean of 44.4 months after trauma. A patient questionnaire, standardized clinical testing, instrumented laxity testing and concentric isokinetic muscle torque evaluation were included. Instrumented laxity testing proved to be closely correlated with the pivot shift test (r=0.54, p〈0.001) and the Lachman test (r=0.73, p〈0.001), but offered a far better resolution. The degree of anterior instability as measured could be shown to correlate negatively with the isokinetic flexor muscle torque (r=−0.61, p〈0.001) and the hamstring/quadriceps ratio (r=−0.44, p〈0.05). The intraindividual differences of instrumented laxity testing revealed that a significant degree of instability (〉2 mm) was present in 49% of the patients contrasting with the good result in the Lysholm score (mean=84.5 pts.) and a 74% rate of satisfied patients. Instrumented laxity testing makes a significant contribution to objective evaluation of functional results after ACL repair.
    Notes: Résumé Une évaluation fonctionnelle objective a été effectuée après réparation unilatérale de rupture du ligament croisé antéro-externe (LCAE) dans une série homogène de 37 patients, avec un recul moyen de 44,4 mois par rapport au traumatisme. Un questionnaire, un contrôle clinique standardisé, des tests instrumentaux de laxité ligamentaire ainsi qu'une évaluation du moment de torsion musculaire isokinétique concentrique furent utilisés. Le contrôle instrumental de la laxité ligamentaire peut être considéré comme très proche du test d'instabilité du pivot (r = 0,54, p 〈 0,001) et le signe de Lachman (r = 0,73, p 〈 0,001) mais est plus rapidement décisif. Le degré d'instabilité antérieure mesuré pourrait être considéré comme corrélé négativement avec le moment de torsion musculaire isokinétique concentrique (r = 0,61, p 〈 0,001) et le rapport ischio-jambiers/quadriceps (r = 0,44, p 〈 0,005). Les différences entre les sujets des tests instrumentaux de laxité ligamentaire révèlèrent qu'un degré significatif d'instabilité (〉 2 mm) existait chez 49 % des patients, ce qui contraste avec les bons résultats au score de Lysholm (moyenne : 84,5 points) et une proportion de 74 % de patients satisfaits. Ainsi le test instrumental de laxité ligamentaire apporte-t-il une contribution importante à l'évaluation fonctionnelle post-opératoire des ligamentoplasties du LCAE.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    European radiology 4 (1994), S. 584-586 
    ISSN: 1432-1084
    Keywords: Pineal body, neoplasms ; Bone neoplasms, secondary
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A case of histologically proven skeletal metastases from pineoblastoma is presented. The primary tumor was initial1y treated by surgery and radiotherapy. To the best of our knowledge this is the third reported case of skeletal metastases arising from such primary tumor.
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  • 5
    ISSN: 1432-1173
    Keywords: Schlüsselwörter Livedo racemosa ; Acrodermatitis chronica atrophicans ; Borreliose ; Keywords Livedo racemosa ; Acrodermatitis chronica atrophicans ; Borreliosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract Classic variants of cutaneous borreliosis are erythema chronicum migrans (ECM), lymphadenosis benigna cutis (LBC) and acrodermatitis chronica atrophicans (ACA). Other dermatoses have been reported in the literature as possibly linked to borreliosis. A 59-year old female patient was seen in the late phases of cutaneous borreliosis with histologically confirmed ACA. In addition, prominent livedo racemosa was seen on the legs, also showing tissue changes similar to those of ACA. Borrelia burgdorferi infection was serologically confirmed by the presence of anti-IgM and anti-IgG antibodies. The clinical spectrum of late cutaneous borreliosis should be enlarged to include livedo racemosa.
    Notes: Zusammenfassung Klassische kutane Varianten der Borreliose sind das Erythema chronicum migrans (ECM), die Lymphadenosis cutis benigna (LCB) und die Acrodermatitis chronica atrophicans (ACA). Darüber hinaus gibt es seltenere, bislang nur kasuistisch beschriebene Dermatosen, der denen der Zusammenhang zu einer Borreliose vermutet wird. Hier berichten wir über eine 59jährige Patientin, die sich bereits im Spätstadium einer Borreliose befand. Einerseits zeigte die Patientin eine Acrodermatitis chronica atrophicans, die histologisch gesichert wurde. Zusätzlich lag eine Livedo racemosa an den unteren Extremitäten vor, die histologisch ebenfalls charakteristische Merkmale einer kutanen Borreliose aufwies. Serologisch ließ sich die Borrelieninfektion durch das Vorhandensein von Antikörpern der Klassen IgM und IgG gegen Borrelia burgdorferi bestätigen. Wir schlagen vor, das bekannte klinische Spektrum der späten kutanen Borreliosen mit dem möglichen Auftreten einer Livedo racemosa zu erweitern.
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  • 6
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In June and July 1984 phytoplankton distribution was investigated in the Fram Strait between Greenland and Svalbard. Chlorophylla, particulate organic carbon, nitrate and phytoplankton species composition were determined from six different depths in the upper 200 m of the water column. Multivariate analysis methods were applied to identify phytoplankton communities in relation to different hydrographic regimes. Three main domains could be distinguished in terms of both hydrography and biology: (1) the East Greenland shelf polynya with a high biomass mainly produced by chain-forming diatoms, (2) the ice-covered East Greenland Current with an extremely low standing stock dominated by flagellates and (3) the marginal ice zone with a biomass maximum in 20 to 40 m depth formed by diatoms, dinoflagellates andPhaeocystis pouchetii.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 71 (1993), S. 664-671 
    ISSN: 1432-1440
    Keywords: Interleukin-6 ; Autoimmune diseases ; Rheumatoid arthritis ; Mesangioproliferative glomerulonephritis ; Systemic lupus erythematosus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Journal of orofacial orthopedics 53 (1992), S. 111-116 
    ISSN: 1615-6714
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The aim of the present in-vitro study was to evaluate the changes in pulp temperature associated with thermal debonding of ceramic brackets using the Ceramic Debonding Unit (Dentaurum). In addition, several forms of false usage were simulated. Instead of thermoelements, the non-contact infrared thermography device SST/THETA 1000 (Heimann) was employed for the dynamic measurement of pulp temperature. Successful debonding after a single activation resulted in a maximal temperature change of 3°C. These in vitro results indicate that the Ceramic Debonding Unit-properly applied—is gentle on the pulp tissue. If debonding fails, the increase in temperature is higher. The influence of differing bracket base morphologies and various resins on electrothermal debonding are discussed.
    Notes: Zusammenfassung Ziel der vorliegenden In-vitro-Studie war es, die durch thermische Abnahme von Keramikbrackets mit der “Ceramic Debonding Unit” (Fa. Dentaurum) entstehenden Temperaturänderungen in der Pulpa zu untersuchen. Zusätzlich wurden verschiedene Formen der Fehlbedienung simuliert. Anstelle von Thermoelementen wurde erstmals das berührungsfrei arbeitende Infrarotthermografiegerät SST/THETA 1000 (Fa. Heimann) zur dynamischen Temperaturmessung in der Zahnpulpa eingesetzt. Es zeigte sich, daß eine erfolgreiche Bracketabnahme nach einfacher Aktivierung Temperaturveränderungen von maximal 3°C zur Folge hat. Insofern sprechen die gefundenen In-vitro-Ergebnisse dafür, daß die „Ceramic Debonding Unit” bei ordnungsgemäßem Einsatz ein pulpaschonendes Verfahren darstellt. Gelingt die Bracketabnahme nicht, so ist die Temperatursteigerung bei belassenem Widerstandsdraht größer. Der Einfluß unterschiedlicher Bracketbasenmorphologien sowie differiender Adhäsivkunststoffe auf das Thermodebonding werden diskutiert.
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of orofacial orthopedics 53 (1992), S. 211-217 
    ISSN: 1615-6714
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Discolouring and layers on bands and restorations during fixed orthodontic therapy are well known clinical phenomenon. Because of the complexity of etiological factors an in-vitro model was used in this study. Aim of the study was to examine the amounts and sort of metals which are dissolved. Therefore, respectively 25 normed MOD-cavities in Frasaco-teeth were filled with a non gamma-2-amalgam (Amalcap plus, Vivadent) and condensed manually or mechanically. In addition, ten crowns of a high golden (Maingold SG, Heraeus) as well as a palladium basis alloy (Albabond A, Heraens) were casted. Then they were banded with stainless steel bands (Dentaurum) and cemented with a glass ionomer cement (Ketac Cem, Espe). The probes were given into a 0,1 molar lactic acid for seven days at 37°C. Using ICP (ion coupled plasma) analysis the corrosion solution was examined for elements. High levels of Zn- and Al-ion contents were found, which are components of the used cements. The filling materials theirselves mainly set free small amounts of Ag, Sn or Cu. The steel band released Fe, Cr, Ni and Ti. The combination of filling material and band resulted in a higher release of most ions.
    Notes: Zusammenfassung Verfärbungen und Auflagerungen an Bändern und Füllungen während Multibandbehandlung sind ein bekanntes klinisches Phänomen. Aufgrund der komplexen Ätiologie wurde in der vorliegenden Untersuchung ein In vitro-Modell gewählt. Ziel der Studie war es, einen Einblick in die Mengen der freigesetzten Ionen und die bevorzugten Metalle zu erhalten. Dazu wurden je 25 genormte MOD-Kavitäten an Frasaco-Zähnen mit einem Non-gamma-2-Amalgam (Amalcap plus, Vivadent) per Hand oder maschinell kondensiert. Zusätzlich wurden je zehn Kronen einer hochgoldhaltigen (Maingold SG, Heraeus) und einer Palladiumbasis-Legierung (Albabond A, Heraeus) bergestellt. Auf alle Proben wurden kieferorthopädische Bander (Dentaurum-Molarenband) mit Glasionomerzement befestigt (Ketac Cem, Espe) und für sieben Tage bei 37°C in einer 0,1 molaren Milchsäure-Kochsalz-Lösung gelagert. Mittels Ion-Coupled-Plasma-(ICP-)Analyse wurden die in der Korrosionslösung befindlichen Elemente analysiert. Es zeigten sich sehr hohe Al- und Zn-Konzentrationen, die auf die Auflösung der Betestigungszemente zurückzuführen sind. Aus den jeweiligen Füllungswerkstoffen wurden vor allein Ag, Sn oder Cu freigesetzt, während aus dem Band Fe, Cr, Ni und Ti stammten. In der Kombination Stahlband und Fühlungswerkstoff kam es in den meisten Fällen zu einer gesteigerten Ionenabgabe.
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Tropical animal health and production 24 (1992), S. 145-156 
    ISSN: 1573-7438
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé L’une des plus grandes populations de dromadaires au monde vit en Somalie où l’on compte environ 5,3 millions de têtes élevées par des pasteurs nomades selon le mode traditionnel. L’intérêt pour le développement potentiel du cheptel camelin dans la zone centrale semi-aride du pays, a été à l’origine d’une enquête pour déterminer la productivité des troupeaux, les affections essentielles et vraisemblablement les points de convergence entre ces différents paramètres. Par le biais d’une approche systématique, des données ont été rassemblées sur les facteurs de production, le milieu, la gestion et les modes de faire-valoir et les variables d’ordre sanitaire. 1 039 dromadaires, répartis en 33 troupeaux, ont fait l’objet de cette étude dans la région centrale de la Somalie. La prévalence deTrypanosoma evansi a varié de 1,7 p. 100 avec les étalements de sang à 56,4 p. 100 par l’emploi du test micro-ELISA (micro-test d’immunoabsorption enzymatique). La séroprévalence de la brucellose a été évaluée à 1,9 p. 100 par le test standard de la séroagglutination et à 0,3 p. 100 par la fixation du complément. Enfin par l’emploid d’une équation de régression multiple, 1,5 p. 100 de la variation totale de la fertilité au sens large ont pu être expliqués grâce aux données recueillies avec la technique de centrigufation au microhématocrite et le micro test ELISA pour la recherche deTrypanosoma evansi, par la fixation du complément pour la brucellose, la taille des troupeaux et le taux de mortalité chez les jeunes. Au nombre des variables de la production des troupeaux, la taille différait de façon significative en fonction des differentes unités de gestion. Les taux de mortalité ches les jeunes, de même que ceux de la fertilité en général ont varié dans les sous-régions écologiques mais avec un effect marqué dans les zones qualifiées d’intérieures (Inland). Différentes associations sont également perceptibles au niveau de certaines variables telles que la demographie, la gestion et la pathologie. L’importance de la trypanosomose et de la brucellose au regard de la productivité des troupeaux ainsi que les mesures de contrôle pour en limiter les conséquences sur la production font l’objet d’une discussion.
    Abstract: Résumé En Somalia existe una de las poblaciones más numerosas de camellos en el mundo. Cerca de 5·3 millones de animales pertenecen a pastores nómadas, los que los manejan bajo sistemas tradicionales. Debido al interés de conocer el potencial productivo de los hatos en las regiones semiáridas de Somalia Central, se inició una investigatión acerca de las principales enfermedades y la asociación entre éstas y la productividad en general. Utilizando un enfoque de sistemas, se colectaron resultados de parámetros productivos, factores ambientales, sistemas de manejo y producción y variables sanitarias. Se estudiaron 1,039 camellos en 33 hatos. La prevalencia deTrypanosoma evansi fluctuó entre 17% en frotis de sangre, hasta 56.4% utilizando microELISA. La seroprevalencia de brucelosis fue de 1·9% con la prueba de aglutinación y de 0·3% con la prueba de fijación del complemento. Usando regresiones múltiples, 15% de la variación total de la tasa de fertilidad general, se pudo explicar relacionando ésta con los resultados de la técnica del microhematocrito utilizando centrifuga, de microELISA paraT. evansi, de fijación del complemento para brucelosis, con el tamaño del hato y con la tasa de mortalidad en animales jóvenes. Entre las variables de producción del hato, el tamaño del mismo difirió significativamente para las diferentes unidades de manejo. Las tasas de mortalidad de animales jóvenes y las de fertilidad, variaron de acuerdo a las subzonas ecológicas, con un efecto marcado en las zonas mediterraneas. Se presentaron también asociaciones entre variables demográficas, de manejo y sanitarias. Se discute la importancia de la tripanosomiasis y de la brucelosis, en relación con la productividad del hato y las medidas para controlarlas, minimizando así su efecto sobre la producción.
    Notes: Summary In Somalia, one of the world’s largest dromedary populations of about 5–3 million animals are kept by nomadic pastoralists under traditional management. Interest in the development potential of camel herds in the semi-aird areas of central Somalia initiated an investigation to determine the productivity of herds, their major diseases and likely associations among these parameters. Using a systems approach, data were collected for herd production parameters, environmental factors, management and production systems, and health variables. One thousand and thirty nine camels in 33 herds were studied in the central regions of Somalia.Trypanosoma evansi prevalence ranged from 1·7% in bloodsmears to 56·4% using enzyme-linked immunosorbent micro-assay (micro ELISA). Seroprevalence for brucellosis was determined as 1·9% by the standard agglutination test (SAT) and 0·3% by the complement fixation test (CFT). Using multiple regression, 15% of the total variation of the general fertility rate was explained by the results of the microhaematocrit centrifugation technique (MHCT) and the microELISA forT. evansi, CFT results for brucellosis, herdsize, and young stock death rate. Among herd production variables, herd size differd significantly for different management units. Young stock death rates, as well as general fertility rates varied in the ecological subzones with a marked effect in the zones labeled “Inland”. Various other associations were noted among demographic, husbandry and disease variables. The importance of trypanosomosis and brucellosis to the productivity of herds and measures to control their limiting effects on production were discussed.
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