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  • Chemistry  (57)
  • Cell & Developmental Biology  (8)
  • Animals
  • 1955-1959  (65)
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  • 1
    Electronic Resource
    Electronic Resource
    Über die Darstellung von 1.12;2.3;10.11-Tribenzo-perylen und 1.12;4.5;8.9-Tribenzo-perylen (1958)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 91 (1958), S. 2151-2157 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Bei der Reaktion von 2.3;10.11-Dibenzo-perylen (I) mit Maleinsäureanhydrid wird ausschließlich das 1.12;2.3;10.11-Tribenzo-perylen-dicarbonsäureanhydrid (II) gebildet, bei dessen Decarboxylierung das 1.12;4.5;8.9-Tribenzo-perylen (XIII) entsteht. Dessen Struktur wurde durch eine unabhängige weitere Synthese bewiesen. Desgleichen wurde das isomere 1.12;4.5;8.9-Tribenzo-perylen (X) synthetisiert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19580911022
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  • 2
    Electronic Resource
    Electronic Resource
    Zinkstaub-Kompounds (1955)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 571-575 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zinc Dust CompoundsZinc dust compounds are consisting chiefly of zinc dust and small amounts of an adhesive and a solvent. The dry film should contain of 94 per cent of zinc dust at least. Under these conditions the particles are in metallic contact with each other as well as with the metal surface.The anti-corrosive properties of zinc dust compounds are due to cathodic protection as well as to sealing off the atmosphere. The cover becomes more compact by the formation of insoluble zinc salts which increase the anti-corrosive properties. Damaged spots of zinc dust compounds films in sea water prove better anti-corrosive properties than those of minium films. These products could also be applied to slightly rusted steel surfaces without any danger of under rusting. They are generally less surface sensitive than the usual anti-corrosive paints. Examples in practice prove their great possibilities of use. These compounds have proved to be good not only on iron and steel but also in the reconditioning of old hot galvanized constructions which had been exposed to atmosphere for a longer time.
    Notes: Zinkstaubkompounds sind Produkte, welche vorwiegend Zinkstaub und daneben kleinere Mengen eines Bindemittels und Lösungsmittel erhalten. Im trocknen Film sollen mindestens 90% Zinkstaub vorhanden sein.Hiermit wird erreicht, daß die Teilchen in metallischem Kontakt miteinander somit der Metalloberfläche stehen.Die Rostschutzwirkung der Zinkstaubkompounds beruht auf einem kathodischen Schutz sowie auf der Abdichtung des Untergrundes von der Atmosphäre. Die Schicht wird nämlich durch Bildung unlöslicher Zinksalze verdichtet und deren Schutzwirkung dadurch noch gesteigert. Im Meereswasser zeigen Zinkstaub-Kompounds einen höheren Rostschutz als Bleimennige bei beschädigten Stellen im Film. Auch auf leicht gerosteten Stahloberflächen lassen sich diese Produkte aufbringen, ohne daß die Gefahr der Unterrostung besteht.Sie sind also im allgemeinen weniger oberflächenempfindlich als die normalen Rostschutzfarben. Beispiele aus der Praxis zeigen ihre beachtlich weiten Anwendungsmöglichkeiten.Nicht nur auf Eisen und Stahl, sondern auch für die Aufarbeitung alter feuerverzinkter Konstruktionen, welche seit längerer Zeit der Atmosphäre ausgesetzt waren, haben die Kompounds sich bewährt.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19550061203
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  • 3
    Electronic Resource
    Electronic Resource
    Anstrich- und rostschutzgerechte Gestaltung der Konstruktion. Der Rostschutz beginnt am Reißbrett (1958)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 9 (1958), S. 197-202 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Designing of Constructions to Make Painting and Protection against Rust Easy (Protection against Rust Begins at the Drawing Board)Construction elements like inaccessible corners and narrow slits should be prevented. To avoid waterbags, channal and angle irons shall be arranged with their openings showing down. Acute angles and connections of lattice masts, tube bridges, and supports which cannot be cleaned easily are unsatisfactory for painting. You should prefer welded constructions to riveted ones, and tube constructions to those made of sectional iron. Horizontal surfaces are endangered by staying water, depositions of dust and soot, and mossy growth. Smoke gases should be kept off railway bridges by wooden shields. Riveted joints and slits must be sealed; bases of girders may not be set in concrete. Suspensors for scaffolds will help to reduce the costs of renovation. Stationnary cars on the underframe of bridges are very useful. Covered girders as well as overlapping joints, and nodal sheets must be painted before they are installed.Welded constructions have advantageously less starting points for rusting than riveted ones because rivet heads are very often the points of precocius rusting.
    Notes: Zu vermeiden sind unzugängliche Ecken und schmale Fugen. U-Eisen und Winkeleisen sollen mit der Öffnung nach unten angeordnet werden, um Wassersäcke zu vermeiden. Anstrichtechnisch mangelhaft sind auch spitze Winkel und schwer zu reinigende Anschlüsse bei Gittermasten, Rohrbrücken und Stützen. Geschweißte Konstruktionen sind den genieteten vorzuziehen, Rohrkonstruktionen solchen aus Profileisen. Waagerechte Flächen sind durch Wasseransammlungen, Staub- und Rußablagerung und Bildung von Moospolstern gefährdet. Bei Eisenbahnbrücken sind Rauchgase durch Holzschilder abzuwehren. Nietstellen und Fugen sind gut zu verkitten, Trägerfüße sind zweckmäßig nicht einzubetonieren. Durch Aufhängevorrichtungen für die Rüstung kann der Erneuerungsanstrich verbilligt werden. Bei Brücken sind stationäre Wagen zur Befahrung der Unteransicht am Platze. Verdeckte Träger sowie sich überdeckende Laschen und Knotenbleche müssen den endgültigen Anstrich vor der Montage erhalten.Geschweißte Konstruktionen haben gegenüber genieteten den Vorteil, weniger Ansatzpunkte zur Rostbildung zu bieten, während im besonderen Nietköpfe häufig Ausgangspunkte vorzeitigen Rostens sind.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19580090402
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  • 4
    Electronic Resource
    Electronic Resource
    Korrosionsschutz durch Anstriche im Spiegel der Statistik und am Beispiel einiger markanter Stahlbauwerke (1959)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 10 (1959), S. 442-445 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Corrosion Protection by Paint Systems, as Appraised by Statistics and Exemplified by Some Prominent Steel BuildingsThe technical literature contains a number of data concerning losses due to corrosion (in quantitative and monetary terms), the cost of corrosion protection (cost of labour and materials, etc.), and the size (in square metres) of the surface areas of steel buildings to be protected by paint systems. An attempt has been made to determine these items statistically.The example of the history of the paint protection of a prominent steel structure, viz. the Eiffel Tower, shows that effective corrosion protection by means of paints is possible if the coats are renewed in good time.
    Notes: Über die Verluste durch Korrosion (mengenmäßig und kostenmäßig), über die Kosten für den Korrosionsschutz (Löhne, Material usf.), über die Größe der durch Anstrichmittel zu schützenden Stahlbauten (m2), sind in der Literatur eine Anzahl von Angaben zu finden. Es wurde versucht, die Werte statistisch zu erfassen.Ferner wird am Beispiel eines bekannten Stahlobjektes, des Eiffelturmes, mittels der Anstrichgeschichte dieses Objektes gezeigt, daß ein Korrosionsschutz durch Anstriche möglich ist, wenn sie in den erforderlichen Zeiträumen erneuert werden.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19590100706
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  • 5
    Electronic Resource
    Electronic Resource
    Dokumentation und Rostschutz durch Anstriche (1958)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 9 (1958), S. 681-686 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Documentation and Protection against Corrosion by PaintsThe protection against corrosion by painsts plays an important part in the range of protective methode available.Modern paints differ considerably from those used thirty or even ten years ago.Successive developments require continuous testing. The recording and evaluation of the results of short-term tests in the laboratory, of weathering tests and practical applications are usually unsatisfactory.A significant documentation would enable a successful comparison and interpretation of results to be given. Thus, some directions on how to prepare a documentation are given.Besides the standard DIN 53210 “Determination of the Degree of Rusting” there is a draft on the determination of the quality of a paint coat. Results are collected in card index files.
    Notes: Der Korrosionsschutz durch Anstriche nimmt bei den zur Verfügung stehenden Schutzverfahren einen breiten Raum ein. Die heute verwendeten Anstrichmittel unterscheiden sich erheblich von denen, die man vor 30 Jahren benutzt hat und selbst von denen, die vor 10 Jahren in Gebrauch waren.Diese ständige Weiterentwicklung erfordert eine fortlaufende Erprobung. Die Erfassung und Auswertung von Ergebnissen bei Kurzprüfungen im Labor, Bewitterungsprüfungen und bei der Anwendung in der Praxis, ist in der Regel unbefriedigend. Aber erst durch eine sinnvolle Dokumentation der Prüfergebnisse können diese mit einander verglichen und ausgewertet werden.Nachfolgend werden Wege aufgezeigt, wie dieses erfolgen kann. Neben der DIN 53210 „Bestimmung des Rostgrades“ wird ein Schema zur Beurteilung des Zustandes des Anstriches mitgeteilt. Die Ergebnisse werden in Karteikarten erfaßt.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19580091102
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  • 6
    Electronic Resource
    Electronic Resource
    A study of laminar-flow heat transfer in tubes (1957)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 3 (1957), S. 172-175 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The general problem of heat transfer to fluids in laminar flow in tubes is discussed, a new procedure for the measurement of local laminar-flow heat transfer coefficients is described, and an empirical equation is presented for the correlation of data for local heat transfer rates to liquids flowing upward in laminar flow in vertical tubes under conditions of constant heat flux at the tube wall.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690030208
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  • 7
    Electronic Resource
    Electronic Resource
    Discharge coefficients through perforated plates at reynolds numbers of 400 to 3,000 (1958)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 4 (1958), S. 266-268 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The correlation of Kolodzie and Van Winkle (3) for predicting dry plate orifice coefficients through perforated plates originally covering a Reynolds number range of 2000 to 20,000 has been extended to apply to Reynolds numbers as low as 400. The correlation applies to column diameters ranging from 3 to 15 in.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690040306
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  • 8
    Electronic Resource
    Electronic Resource
    Greetings - - (1955)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 1 (1955), S. 7-7 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690010101
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  • 9
    Electronic Resource
    Electronic Resource
    Use of the redlich and kwong equation of state in calculating thermodynamic properties of gases from experimental compressibility data (1955)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 1 (1955), S. 100-104 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Convenient and accurate methods of calculating the thermodynamic properties of gases from experimental compressibility-factor data through the use of the Redlich and Kwong equation of state are presented. Analytical and graphical methods are combined. As an example, fugacity and activity coefficients are calculated for the nitrogen-ethylene system at 50°C. for pressures up to 500 atm.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690010115
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  • 10
    Electronic Resource
    Electronic Resource
    Mass transfer in a continuous-flow mixing vessel (1957)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 3 (1957), S. 283-286 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Mass transfer coefficients have been determined for the dissolution of Na2S2O3·5H2O crystals in water under conditions of turbulent agitation in a mixing vessel. The dissolution was carried out in a steady-flow process in which the area of selt crystals and the concentration of the solution in the mixing vessel were constant during each run. A comparison is made with previously unpublished results for batch runs in a similar system, and a method is developed for calculating the surface area of salt particles suspended in the mixing vessel under steady-flow conditions.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690030227
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