Nordihydroguaiaretic acid blocks secretory and endocytic pathways in human dendritic cells

The authors evaluated the clinical longevity of a brand of porcelain veneers and the accompanying cementation system. Fifty-nine porcelain veneers were prepared and placed in 12 patients by one practitioner and evaluated by two evaluators using modified Ryge criteria at baseline and 12 months. Fifty-three veneers were evaluated similarly at 48 months. Plaque index and gingival index scores were recorded as well. At 48 months, the veneers had stable color, all margins were clinically acceptable, there was no secondary caries and the patients reported no sensitivity.     

Der elastisch-plastische Querpreßverband bei verschiedenen Fließgrenzen von Innen-und Außenteil

Zusammenfassung Gegenstand der Untersuchung sind die Bedingungen für die Plastizierung des Innenteils eines idealplastischen Pre?verbands. Dieses unerwünschte Ereignis kann eintreten, wenn die Flie?grenze des Innenteils kleiner als diejenige des Au?enteils ist.     

Comparison of nested PCR with immunofluorescent-antibody assay for detection of Ehrlichia canis infection in dogs treated with doxycycline

A partial 16S rRNA gene was amplified in Ehrlichia canis-infected cells by nested PCR. The assay was specific and did not amplify the closely related Ehrlichia chaffeensis, Ehrlichia muris, Neorickettsia helminthoeca, and SF agent 16S rRNA genes. The assay was as sensitive as Southern hybridization, detecting as little as 0.2 pg of E. canis DNA. By this method, all blood samples from four dogs experimentally infected with E. canis were positive as early as day 4 postinoculation, which was before or at the time of seroconversion. One hundred five blood samples from dogs from Arizona and Texas (areas of E. canis endemicity) and 30 blood samples from dogs from Ohio (area of E. canis nonendemicity) were examined by nested PCR and immunofluorescent-antibody (IFA) test. Approximately 84% of dogs from Arizona and Texas had been treated with doxycycline before submission of blood specimens. Among Arizona and Texas specimens, 46 samples were PCR positive (44%) and 80 were IFA positive (76%). Forty-three of 80 IFA-positive samples (54%) were PCR positive, and 22 of 25 IFA-negative samples (88%) were negative in the nested PCR. None of the Ohio specimens were IFA positive, but 5 specimens were PCR positive (17%). Our results indicate that the nested PCR is highly sensitive and specific for detection of E. canis and may be more useful in assessing the clearance of the organisms after antibiotic therapy than IFA, especially in areas in which E. canis is endemic.     

An experimental study of void fraction and heat transfer under upward and downward flow boiling conditions

Heat transfer coefficient and actual void fraction have been measured during upflow and downflow boiling of water in an annular channel. At the same values of pressure, mass flux, heat flux and flow quality significant difference of void fraction has been established in upflow and downflow. The upflow and downflow heat transfer coefficients did not deviate significantly from each other, if compared at identical values of pressure, mass flux, heat flux and actual void fraction.     

Untersuchungen an bewitterten Holzoberflächen—4. Mitteilung: Versuche mit einem Imprägnieranstrich auf Basis der Madison-Formula

Zusammenfassung Auf der Grundlage der vorangegangenen Untersuchungen wurde der ziemlich wetterbest?ndige, feuchtigkeitsschützende Impr?gnieranstrich “Madison-Formula” des Forest Products Laboratory/Madison, USA, unterschiedlich pigmentiert und, anstelle von Pentachlorphenol der Originalrezeptur, mit verschiedenen Fungiziden gegen dunkelf?rbende Schimmelpilze versehen. Die unpigmentierte Anstrichvariante erwies sich als zu wenig halthar, die wei? und die umbra pigmentierte dagegen als recht dauerhaft. 4 organische Metallsalzverbindungen, die im Laborversuch als die wirksamsten Fungizide ermittelt worden waren, konnten aufgrund der Ergebnisse der Freiland-Bewitterungsversuche nur teilweise befriedigen. Die beste Wirksamkeit zeigte eine Cu-Verbindung, die allerdings eine ausgepr?gte Eigenf?rbung besitzt. Einige Schutzmittel beeintr?chtigten die Anstrichhaltbarkeit. Pigmentierung und Fungizide hatten teilweise einen starken Einflu? auf die Holzfeuchte der Probebretter und auf die Holzfeuchteschwankungen.

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Investigations on weathered wood Surfaces—Part IV: Tests with an impregnating paint on “Madison Formula” basis

Summary On the basis of the previous investigations the rather weather and moistureproof impregnating paint “Madison-Formula” of the Forest Products Laboratory, Madison, USA, was pigmented to different degrees and provided with various fungicides against dark-staining mould fungi, instead of pentachlorphenol of the original formula. The non-pigmented paint was found to be less permanent, the white and umbra pigmented paint, however, proved quite resistant. Four organic metal salt composites, found to be the most efficient fungicides in laboratory experiments, were satisfactory only to some extent, as the results of field weathering revealed. A copper compound proved most efficient, which possesses, however, a pronounced natural colour. Some preservatives affect the durability of the paint. Pigmentation and fungicides partly had a strong effect on the wood moisture of the board specimens and on wood moisture variations.

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1. Mitteilung: Kühne, H., Leukens, U., Sell, J., W?lchli, O. [1970]; 2. Mitteilung: Sell, J., Leukens, U. [1971]; 3. Mitteilung: Sell, J. Leukens, U. [1971].     

Die Spannungen an der Trennfläche zwischen Halbraum und Halbzylinder bei Erregung durch eine ebene SH-Welle

Zusammenfassung Das Verschiebungs- und Spannungsfeld in einem elastischen Halbraum und einem an dessen Oberfl?che eingeschlossenen halbzylindrischen elastischen Einschlu? infolge der Erregung durch eine unter einem beliebigen Winkel einfallende ebene harmonische SH-Welle wird berechnet. Es folgt die Untersuchung des statischen Grenzfalls sowie des Grenzfalls einer unendlich kleinen Kerbe. Numerische Ergebnisse für die Amplituden der Spannungen an der Trennfl?che und deren Phasenwinkel als Funktionen des Ortes und der Frequenz bilden den Abschlu?.