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  • 1
    Electronic Resource
    Electronic Resource
    Action of phenols on the corrosion of 3S aluminium in hydrochloric acid solutions (1973)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 24 (1973), S. 964-966 
    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: Wirkung von phenolen auf die Korrosion von Al 3S in SalzsäurelösungenDie inhibierende Wirkung einiger Phenole auf die Korrosion von Eisen in 0,5 n Salzsäure ist abhängig von der Konzentration und der Konstitution des jeweiligen Inhibitors. Die Wirkung nimmt ab in der Reihenfolge p-Thiokresol 〉 Pyrogallol 〉 Reihenfolge 〉 Phenol 〉 p-Kresol 〉 m-Kresol 〉 o-Kresol. Der geringe Hemmwert der Kresole scheint durch die Elektronendonator-Wirkung der CH3-Gruppen und durch deren Wechselwirkung mit der ebenfalls als Elektrodonator auftretenden OH-Gruppe bedingt zu sein. Die SH- und OH-Gruppen scheinen die Adsorption an den kathodischen Stellen ebenso zu erleichtern, wie es die π-Elektronen des aromatischen Ringes tun.
    Notes: The inhibiting effect of some phenols on the corrosion of iron in 0.5 N hydrochloric acid depends from the concentration and the constitution of the particular inhibitor. The effect decreases in the following order; p-thiocresol 〉 pyrogallol 〉 resorcinol 〉 phenol 〉 p-cresol 〉 m-cresol 〉 o-cresol. The low inhibiting power of the cresols appears to be due to the cresol appears to be due to the electron donating capacity of th CH3 groups and their interaction with OH groups which is an electron donator, too. The SH and OH groups appear to facilitate the adsorption on cathodic sites as do the π-electrons of the aromatic annulus.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19730241106
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  • 2
    Electronic Resource
    Electronic Resource
    The molecular structures of benzoic acids and their inhibitive action on 3S aluminium in hydrochloric acid solution (1973)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 24 (1973), S. 1036-1038 
    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: Wirkung von Phenolen auf die Korrosion von Aluminium 3 S in SalzsäurelösungenUntersucht wurde der Einfluß von Phenol, p-Kresol, o-Kresol, m-Kresol, Pyropgallol, Resorcin und p-Thiokresol auf Korrosion von Aluminium 3 S in 0,5 n Salzsäure. Das kathodische Verhalten wurde dabei galvanostatisch untersucht. Die Wirkung der Inhibitoren ist abhängig von den Substitionen und deren Stellung im Ring. Nimmt ab in Reihenfolge p-Thiokresol  -  Pyrogallol  -  Resorcin  -  Phenol  -  p-Kresol  -  m-Kresol  -  o-Kresol. Die Inhibitoren werden bevorzugt an den kathodischen Stellen adsorbiert.
    Notes: The influence of phenol, p-cresol, o-cresol, m-cresol, pyrogallol, résorcinol and P-thiocresel on the corrosion of A1 3 S in 0.5 n hydrochlorid acid has been studied; the cathodic behaviour was investigated by a galvanostatic method. The efficiency of the inhibitors depends from the substituents and their position in the ring. It decreases in the order p-thiocresol  -  py-rogallol  -  resorcinol  -  phenol - p-cresol  -  m-cresol  -  o-cresol. The inhibitors are preferentially adsorbed at the cathodic sites.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19730241204
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  • 3
    Electronic Resource
    Electronic Resource
    Corrosion inhibitors for aluminium and its alloys in neutral media (1974)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 25 (1974), S. 753-756 
    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: Korrosionsinhibitoren für Aluminium und dessen Legierungen in neutralen MedienAusgehend von bisher bekannten Inhibitoren für Wasser, Natriumchlorid und andere Salzlösungen wird über neue Ergebnisse berichtet, die mit der Inhibierung in Natriumpersulfatlösungen erhalten wurden. Die dabei untersuchten Inhibitoren zeigen zunehmende Wirksamkeit in der Reihe Nicotinsäure - Chinolin - Pyridin-alpha-Picolin-2,4-Lutidin. Die Wirksamkeit ist vor allem bedingt durch das Stickstoffatom, das die Chemisorption der Verbindung an der Oberfläche des Metalls erleichtert. Die Wirksamkeit läßt sich erklären durch die Erhöhung der Elektronendichte des heterocyclischen Systems am Stickstoff.
    Notes: On the basis of results so far available on inhibitors for water, sodium chloride and other salt solutions new results are reported which were obtained with respect to the inhibition in sodium persulfate solutions. The inhibitors studied in this context show increasing efficiency in the order nicotinic acid - quinonline - pyridine - alpha-picoline - 2,4-lutidine. The efficiency is primarily due to the nitrogen atom facilitating chemisorption of the particular compound to the metal surface. The efficiency may be interpreted in terms of the increased electron density of the heterocyclic system at the nitrogen atom.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19740251011
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  • 4
    Electronic Resource
    Electronic Resource
    Field ecology and behaviour of the rhesus macaque (Macaca mulatta): I. Group composition, home range, roosting sites, and foraging routes in the Asarori Forest (1978)
    Springer
    Primates 19 (1978), S. 483-492 
    Details
    ISSN: 0032-8332
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The data presented here resulted from about 1,100 observation hours in a nine-month field study of rhesus monkey from January to October 1976 in the Asarori Forest, Dheradun. Six groups were studied, the group size varied from 6–90 individuals. With the exception of one group, all were of the bisexual multimale type. The number of adult males per group varied from two to seven, and of adult females from 4 to 27. The adult sex ratio was male 1 to females 2.2–3.7 (mean 1:2.7). The exceptional group originally consisted of five juveniles only (3 ♂, 2 ♀); later on an adult male joined the group. Home ranges varied from 1.3–13.4 km2 and overlapped extensively with another. The area of home range showed straight line relationship with group size. Roosting sites were not fixed but changed from night to night. The straight line distance between one night to the next varied from 75–2,500 m. Foraging routes per day ranged from 1,050–3,500 m (mean 1,803.3±160.2). There is a significant relationship between the foraging route (L) and the straight line distance between roosting sites (D). The ratio D/L varies from 0.14–0.87.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02373310
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  • 5
    Electronic Resource
    Electronic Resource
    On the dynamics of the hanuman langur populations of jodhpur (Rajasthan, India) (1981)
    Springer
    Primates 22 (1981), S. 182-191 
    Details
    ISSN: 0032-8332
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The city of Jodhpur (26°18′N, 73°8′E) supports a population of about 900 hanuman langurs (Presbytis entellus) divided into 24 bisexual troops and 12 all-male bands in an area of 60 km2. This population has been censused from 1968 to 1978. Over this period the population of bisexual troops has remained stable around 700, while the population of all-male bands has increased from 160 to 230 individuals. The bisexual troops show a tendency towards a reduction in population growth rate with increasing troop size, with troops over 50–60 tending to split. Very small troops may grow by large scale immigration. Although a number of male changes and mortality through infanticide have been recorded, there is no evidence of a regular periodicity in the occurrence of initial, growth and mature phases in the life history of a bisexual troop. Unlike the bisexual troops, the all-male bands show no tendency towards a reduction in growth rate with the increase in band size, but show a continuous growth of band size over the study period. Langurs of Jodhpur rely heavily on cultivated fields for their sustenance. This cultivation has been on increase over the study period, and since the males invade cultivation more readily, they may have been able to take fuller advantage of these increasing resources and affect a population increase that has not been possible for the bisexual troops.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02382609
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  • 6
    Electronic Resource
    Electronic Resource
    Infanticide and social change in two groups of the hanuman langur,Presbytis entellus, at Jodhpur (1979)
    Springer
    Primates 20 (1979), S. 293-300 
    Details
    ISSN: 0032-8332
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Infanticide and social change in two neighbouring bisexual groups of the langur,Presbytis entellus, at Jodhpur (at the eastern edge of the Great Indian Desert), during a two-year period are described. Here the fluidity of leadership is more marked than in other primates. The change of leadership is sometimes associated with infanticide. Other features noted were: that neighbouring bisexual groups may temporarily fuse into one; and that intergroup presentations and copulations may occur.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02373381
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