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  • Chemistry  (9,236)
  • 2005-2009  (13)
  • 1950-1954  (9,223)
  • 1
    Publication Date: 2009-07-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Diederich, Francois -- England -- Nature. 2009 Jul 2;460(7251):33. doi: 10.1038/460033c.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19571863" target="_blank"〉PubMed〈/a〉
    Keywords: Chemistry ; Internet ; Periodicals as Topic/*standards/*trends ; Printing/*trends ; Societies, Scientific
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 2
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2009-11-07
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogel, Gretchen -- New York, N.Y. -- Science. 2009 Nov 6;326(5954):788-91. doi: 10.1126/science.326_788.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19892956" target="_blank"〉PubMed〈/a〉
    Keywords: *Academies and Institutes/economics/organization & administration ; Anthropology ; Biology ; Chemistry ; Germany ; Germany, East ; Physics ; Research Personnel ; Universities
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 2021-05-19
    Description: The anthropogenic affectation was evaluated on the coast N of the Gulf of Batabanó in May 2003 (corresponding to the provinces of Matanzas and Havana), in areas located in the line of the coast. The results were compared with the historical information of the sector. In the coast N and the Ensenada of the Broa, the parameters oxygen saturation, DBO5 and DQO showed characteristic high values of eutrofication. The biggest contribution in the Cianoficies was in the near coastal areas to sources of organic contamination. In the case of the nutrients they show specific data of mesothrofic waters with tendency to the eutrofization and the silts presented a high affectation for toxic metals. The area near to Guanímar is distinguished to present conditions of organic contamination that favor heterothrofic conditions, corroborated by a prevalence of the processes of mineralization of the organic matter over primary production and lows values of fitoplankton concentration. On the contrary, in the region of Surgidero of Batabanó, the processes of synthesis of organic matter prevail suggested by a high primary production, and concentration of fitoplankton, with low breathing levels and mineralization of the organic matter, that indicates that the system is behaving autothrofically. In a general way, this sector is very affected by the anthropogenic impact. The information obtained is of great importance for the development of the fishing and tourist industries in the area.
    Description: Published
    Keywords: Phytoplankton ; Water quality ; Primary production ; Chemistry ; Environmental monitoring ; Phytoplankton ; Water quality ; Primary production ; Chemistry ; Environmental monitoring
    Repository Name: AquaDocs
    Type: Proceedings Paper
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  • 4
    Publication Date: 2020-12-21
    Description: This paper introduces the three-dimensional Hamburg Model of the Neutral and Ionized Atmosphere (HAMMONIA), which treats atmospheric dynamics, radiation, and chemistry interactively for the height range from the earth’s surface to the thermosphere (approximately 250 km). It is based on the latest version of the ECHAM atmospheric general circulation model of the Max Planck Institute for Meteorology in Hamburg, Germany, which is extended to include important radiative and dynamical processes of the upper atmosphere and is coupled to a chemistry module containing 48 compounds. The model is applied to study the effects of natural and anthropogenic climate forcing on the atmosphere, represented, on the one hand, by the 11-yr solar cycle and, on the other hand, by a doubling of the present-day concentration of carbon dioxide. The numerical experiments are analyzed with the focus on the effects on temperature and chemical composition in the mesopause region. Results include a temperature response to the solar cycle by 2 to 10 K in the mesopause region with the largest values occurring slightly above the summer mesopause. Ozone in the secondary maximum increases by up to 20% for solar maximum conditions. Changes in winds are in general small. In the case of a doubling of carbon dioxide the simulation indicates a cooling of the atmosphere everywhere above the tropopause but by the smallest values around the mesopause. It is shown that the temperature response up to the mesopause is strongly influenced by changes in dynamics. During Northern Hemisphere summer, dynamical processes alone would lead to an almost global warming of up to 3 K in the uppermost mesosphere.
    Description: Published
    Description: 3903-3931
    Description: reserved
    Keywords: Sensitivity ; Chemistry ; 01. Atmosphere::01.01. Atmosphere::01.01.02. Climate
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 5
    Publication Date: 2023-01-19
    Description: Bromine monoxide (BrO) and sulphur dioxide (SO2) abundances as a function of the distance from the source were measured by ground-based scattered-light Multi AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) in the volcanic plumes of Mt. Etna on Sicily, Italy in August-October 2004 and May 2005 and Villarica in Chile in November 2004. BrO and SO2 spatial distributions in a cross section of Mt. Etna’s plume were also determined by Imaging DOAS. We observed an increase in the BrO/SO2 ratio in the plume from below the detection limit near the vent to about 4.5 x 10-4 at 19 km (Mt. Etna) and to about 1.3 x 10-4 at 3 km (Villarica) distance, respectively. Additional attempts were undertaken to evaluate the compositions of individual vents on Mt. Etna. Furthermore, we detected the halogen species ClO and OClO. This is the first time that OClO could be detected in a volcanic plume. Using calculated thermodynamic equilibrium compositions as input data for a one–dimensional photochemical model, we could reproduce the observed BrO and SO2 vertical columns in the plume and their ratio as function of distance from the volcano as well as vertical BrO and SO2 profiles across the plume with current knowledge of multiphase halogen chemistry, but only when we assumed the existence of an ”effective source region”, where volcanic volatiles and ambient air are mixed at about 600°C (in the proportions of 60% and 40%, respectively)
    Description: Published
    Description: D06311
    Description: 3V. Proprietà chimico-fisiche dei magmi e dei prodotti vulcanici
    Description: JCR Journal
    Description: open
    Keywords: Chemistry ; Volcanic Plumes ; 04. Solid Earth::04.08. Volcanology::04.08.01. Gases ; 04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring ; 04. Solid Earth::04.08. Volcanology::04.08.07. Instruments and techniques
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 6
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2007-02-10
    Description: Achieving a fundamental understanding of the phenomena that will underpin both global stewardship and future technologies in energy calls for a thoughtful balance between large-scale immediate solutions using existing technology and the fundamental research needed to provide better solutions in the 50-year period.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Whitesides, George M -- Crabtree, George W -- New York, N.Y. -- Science. 2007 Feb 9;315(5813):796-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA. gwhitesides@gmwgroup.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17289985" target="_blank"〉PubMed〈/a〉
    Keywords: Biomass ; Biotechnology ; Carbon Dioxide/chemistry ; Catalysis ; Chemical Phenomena ; Chemistry ; Electricity ; Electrodes ; *Energy-Generating Resources ; Environment ; Photosynthesis ; *Research ; Solar Energy
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 7
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2007-12-22
    Description: The runners-up for 2007's Breakthrough of the Year include advances in cellular and structural biology, astrophysics, physics, immunology, synthetic chemistry, neuroscience, and computer science.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉New York, N.Y. -- Science. 2007 Dec 21;318(5858):1844-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18096772" target="_blank"〉PubMed〈/a〉
    Keywords: Algorithms ; Animals ; Cellular Reprogramming ; Chemical Phenomena ; Chemistry ; Cosmic Radiation ; Humans ; Imagination ; Memory ; Physical Phenomena ; Physics ; Pluripotent Stem Cells ; Receptors, Adrenergic, beta-2/chemistry ; *Science ; T-Lymphocyte Subsets/cytology/immunology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
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    Alexandria: National Institute of Oceanography and Fisheries
    Publication Date: 2021-05-19
    Description: This journal is published by the NIOF, Egypt
    Description: Lake Manzalah; the largest delta Lake in Egypt represents a dynamic system that has been undergoing continuous and pronounced changes since long times. In the last year’s this Lake faced drastic problems that retarded its environmental and fisheries development; the most serious one is the discharge of waste water. It is attempted in the present study to investigate the chemical characters of Lake Manzalah water during 2001-2002. Water temperature ranged from an average of 12.35oC in January and 29.14oC in July. Dissolved Oxygen, pH and total dissolved solids were found in ranges optimum for the living of marine and freshwater fish species. The average concentrations of nutrients lied in the following ranges: 1.24 to 4.89 μmol PO4 -3 l-1 , 5.08 to 28.73 μmol SiO4 -2 l-1 and 1.81 to 17.7 μ_mol NO3-1 l-1 The concentrations of phosphorus and nitrogen compounds were found to be relatively higher at the southern regions of the Lake near to the outlets of the drains.
    Description: NIOF
    Description: Published
    Keywords: Hydrography ; Water ; Chemistry ; Chemical composition ; Water content ; Environment ; Chemical composition ; Environments ; Water content ; Fisheries
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
    Format: 1623488 bytes
    Format: 46916 bytes
    Format: application/pdf
    Format: application/pdf
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  • 9
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2006-07-22
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Szathmary, Eors -- New York, N.Y. -- Science. 2006 Jul 21;313(5785):306-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Biology, Eotvos University Budapest, and Collegium Budapest (Institute for Advanced Study), 2 Szentharomsag utca, H-1014 Budapest, Hungary. szathmary@colbud.hu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16857926" target="_blank"〉PubMed〈/a〉
    Keywords: *Biological Evolution ; Chemical Phenomena ; Chemistry ; Computational Biology ; Cooperative Behavior ; Cultural Evolution ; Exobiology ; Humans ; Language ; Models, Biological ; Models, Theoretical ; Molecular Biology ; Origin of Life ; *Research ; Selection, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2006-11-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Enserink, Martin -- New York, N.Y. -- Science. 2006 Nov 24;314(5803):1235-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17124302" target="_blank"〉PubMed〈/a〉
    Keywords: Chemistry ; *Cooking ; *Food ; France ; History, 20th Century ; History, 21st Century
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 11
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2006-04-29
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Enserink, Martin -- New York, N.Y. -- Science. 2006 Apr 28;312(5773):512.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16645058" target="_blank"〉PubMed〈/a〉
    Keywords: Chemistry ; China ; *Fatty Acids ; France ; History, 21st Century ; *Theft
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 12
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2005-05-10
    Description: Here we describe the requirements of an e-Infrastructure to enable faster, better, and different scientific research capabilities. We use two application exemplars taken from the United Kingdom's e-Science Programme to illustrate these requirements and make the case for a service-oriented infrastructure. We provide a brief overview of the UK "plug-and-play composable services" vision and the role of semantics in such an e-Infrastructure.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hey, Tony -- Trefethen, Anne E -- New York, N.Y. -- Science. 2005 May 6;308(5723):817-21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Engineering and Physical Sciences Research Council, Polaris House, North Star Avenue, Swindon SN2 1ET, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15879209" target="_blank"〉PubMed〈/a〉
    Keywords: Chemical Phenomena ; Chemistry ; Combinatorial Chemistry Techniques ; *Computational Biology ; *Computer Communication Networks ; *Computing Methodologies ; Databases as Topic ; Graves Disease/genetics ; *Internet ; *Research ; *Software ; Williams Syndrome/genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 13
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2005-10-22
    Description: If you trust the conventional wisdom, Amy Palmer and Alexis Templeton did a lot of things wrong in their job search. Then why did things turn out so right?〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Austin, Jim -- New York, N.Y. -- Science. 2005 Oct 21;310(5747):518-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16239480" target="_blank"〉PubMed〈/a〉
    Keywords: *Career Choice ; *Career Mobility ; Chemical Phenomena ; Chemistry ; Education, Graduate ; *Faculty ; Microbiology ; *Research ; United States ; *Universities
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 14
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 275 (1954) 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 15
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 275 (1954), S. 289-296 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Vorversuche mit den reinen Pentoxyden Nb2O5 und Ta2O5 lieferten die bereit von BRAUER gefundenen Modifikationen T—Nb2O5, M—Nb2O5, H—Nb2O5 und T—Ta2O5 Außerdem ergab sich, daß Ta2O5 aus dem Schmelzfluß in einer weiteren  -  vermutlich in der von LAGERGREN und MAGNÉLI schon beobachteten  -  Modifikation kristallisiert.Die Pentoxyde Nb2O5 und Ta2O5 sind im festen Zustand miteinander mischbar. Die tantalreiche Mischphase besitzt das T-Gitter; die niobreiche Mischphase liegt in der MH-Form vor. Die Grenzzusammensetzung, bei der die T—MH-Umwandlung eintritt wurde für 900, 1050 und 1200°C bei 84, 67 und 61 Mol-% Nb2O5 gefunden. Ein heterogenes Gebiet, in dem beide Phasen nebeneinander vorliegen, kann nur klein sein. Die T—MH-Umwandlung ist bei entsprechender Variation der Zusammensetzung der Pentoxydphase reversibel durchführbar. Die Existenz einer instabilen, tantalreichen MH-Phase wurde nachgewiesen. Zwischen den Phasen T—Nb2O5, T—Ta2O5, MH—Nb2O und MH—Ta2O5 besteht Isodimorphie.
    Additional Material: 3 Ill.
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  • 16
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 275 (1954), S. 301-319 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Nach umfangreichen Untersuchungen über die Reproduzierbarkeit von Metallpotentialen gegenüber fremdionigen(2) Lösungen und die zu deren Erzielung erforderlichen Voraussetzungen wurden die Potentiale von Pt, Ag, Au, Hg, Cu und Graphit gegenüber wäßrigen Lösungen von HClO4 bzw. NaOH verschiedener Konzentrationen gemessen. Die Ergebnisse werden durch eine Potentialtheorie gedeutet, die als Primärvorgang die Adsorption von Lösungsmittelmolekeln an der Elektrodenoberfläche zugrunde legt, die dann weitere potentialbildende Sekundärvorgänge auslösen kann. Bei Vorliegen mehrerer potentialbildender Systeme entscheidet die Potentialstabilität über die Potentialbestimmung.
    Additional Material: 7 Ill.
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  • 17
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 275 (1954) 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 18
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 275 (1954), S. 327-330 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Hydroxylamin wird durch Kaliumnitrosodisulfonat unter Bildung von Distickstoffmonoxyd, Kaliumhydroxylamindisulfonat und Wasser glatt dehydriert.Kaliumhydroxylamindisulfonat läßt sich bromatometrisch bequem und genau bestimmen.
    Type of Medium: Electronic Resource
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  • 19
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 275 (1954), S. 1-20 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Durch thermische Spaltung von Germaniumtetrachlorid im Abschreckrohr gelang es, ein Germaniummonochlorid der Formel (GeCl)x darzustellen. Sein Existenzbereich wurde ermittelt. Thermische Zersetzung dieses Monochlorids führt je nach Art der Reaktionsbedingungen neben Germaniumtetrachlorid zu kristallinem Germaniumdichlorid, höheren Germaniumchloriden und metallischem Germanium.  -  Es konnte ein Digermaniumhexachlorid der Formel Ge2Cl6 dargestellt werden.
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  • 20
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 275 (1954), S. 297-300 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es werden die vorläufigen Strukturuntersuchungsergebnisse der von uns aufgefundenen 2. Modifikation des Claudetits mitgeteilt. Der Claudetit II kristallisiert in den Raumgruppen C2(2) oder Cs(2). Die Gitterabmessungen sind: a1 = 7,99 Å; a2 = 4,57 Å; a3 = 9,11 Å; α2 = 78°19′; Z = 4 Formeleinheiten As2O3; ϱr = 4,02 g/cm3. An Hand von PATTERSON-, gemischten PATTERSON- und Fourier-Synthesen kann gezeigt werden, daß die Verknüpfung der Atome in beiden Claudetitmodifikationen ähnlich ist.
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  • 21
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 275 (1954), S. 320-326 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wurden Darstellungsmethode und Eigenschaften der Selenide und Telluride des Urans untersucht. USe (a = 5,739 kX) und UTe (a = 6,151 kX) besitzen NaCl-Struktur.Die Möglichkeit von Bildung von festen Lösungen der Uranmonochalkogenide mit Uranmonoverbindungen der Elemente der V. Gruppe wurde untersucht; die Gitterkonstanten der Mischkristallreihen U(As, Se) und U(Sb, Te) wurden festgestellt.U3Te4 ist kubisch, (Th3P4-Typ a0 = 9,378 kX), UTe2 tetragonal (a = 3,998 kX, c/a = 1,865), UOSe tetragonal (PbFCl-Typ, a = 3,893 kX, c/a = 1,789). Einige Synthesen des UOSe werden beschrieben.
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  • 22
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 275 (1954), S. 331-337 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wurden Versuche zur Ermittlung der Konstitution des gelben Komplexes durchgeführt, der beim Zusammengießen von sauren Titansalzlösungen mit Wasserstoffperoxyd entsteht. Die Konzentration der TiO2--Ionen betrug stets 0,0005 Mole/1, die der Säure variierte von 0,1 bis 1,0 Mole/l. Das Molverhältnis [H2O2]/[TiO2+] wurde zwischen 0,1 und 8,0 geändert. Es wurden Extinktionsmessungen in verd. H2SO4, HCl, HNO3 und HClO4 ausgeführt und gefunden, daß Anionen an dem Aufbau des Komplexes in Lösung nicht beteiligt sind. Der Komplex ist positiv geladen, sein molarer Extinktionskoeffizient ist 594 für Licht von der Wellenlänge 436 mμ, die Komplexdissoziationskonstante wurde zu 5,4 · 10-5 bestimmt.
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  • 23
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 275 (1954), S. 338-348 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Umsetzung zwischen SO3 und NH3 in nichtwäßrigem und in wäßrigem Medium wurde studiert. Es zeigte sich, daß der primäre Schritt der Reaktion nicht die Bildung der Amidosulfonsäure sein kann. Primär entsteht vielmehr Sulfimid, O2SNH. Sulfimid polymerisiert sich leicht zu einem Trimeren, einem Tetrameren oder einem kettenförmig gebauten höheren Polymeren; letzteres reagiert mit SO3 und H2SO4 zu Polysulfimidsulfonsäuren. Die Hydrolyse dieser Sulfonsäuren führt zu den gleichen Produkten, die man direkt bei der Reaktion von SO3 und NH3 in wäßriger Lösung erhält.
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  • 24
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 275 (1954), S. 59-64 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wurden Elektrolytchrom-Präparate hergestellt. Von den in der Achatmühle gemahlenen Präparaten wurden die Suszeptibilitäten nach Gouy bestimmt. Die achatpulverkorrigierten Suszeptibilitäten, gegen den Oxydgehalt der Präparate aufgetragen, liegen auf einer Geraden. Die Extrapolation auf den Oxydgehalt Null ergibt den Wert \documentclass{article}\pagestyle{empty}\begin{document}$$ \chi _\infty = + 2,65 \cdot 10^{ - 6}\; {\rm bzw}{\rm .}\chi _{{\rm Atom}} = + 138 \cdot 10^{ - 8} $$\end{document}.
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    Zeitschrift für anorganische Chemie 275 (1954), S. 21-31 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wurden die bei der Einwirkung von wäßrigem KF auf MoO3 und WO3 entstehenden Bodenkörper isoliert und untersucht. Im System MoO3—KF—H2O konnte die Existenz von fünf verschiedenen Verbindungen nachgewiesen werden: K3MoO3F3 (I), K2MoO3F2 · H2O (II), K3Mo4O13F · 3 H2O (III), K2MoO2F4 · H2O (IV) und K2Mo4O13 (V). Die durch Entwässern von (III) erhaltene Verbindung K3Mo4O13F ist instabil und nicht mit der im System K2Mo4O13/KF vorkommenden inkongruent schmelzenden Verbindung K3Mo4O13F identisch. (II) läßt sich entwässern; die wasserfreie Verbindung K2MoO3F2 ist instabil und zerfällt beim Schmelzen in (I) und MoO3. Im System WO3—KF—H2O konnte die Existenz nur einer Verbindung K2WO3F2 · H2O nachgewiesen werden.
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 64-67 
    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
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 118-118 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 195-195 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 197-197 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 56-64 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 79-80 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 78-78 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. I 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954) 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 138-139 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 151-155 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 139-140 
    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: Protective Lead Coating by PaintThe number of metallic pigments capable of being used as a rust preventative is small. Ultra-finely pulverised lead has proved to be far superior to all other metals. However, the addition of a binder in all respects suitable to the pigment is an absolute necessity when lead is used. Chlorinated rubber has been proved to be of particular value in this respect. The use of “Plumbol” paint also applies a coating of lead on the surface of iron, one coat of which has the same protective value as three or four coats of oil-bound paints. Weathering tests have also substantiated the protective value of lead coating paints as compared with the usual oil-bound paints. A maximum of protection is obtained against the action of certain chemical agents (soda lye, potash lye, sulphurous acid, sulphuric acid, acetic acid and other cold dilute acids), but no protection against the effect of nitrose (a solution of nitrosyl sulphuric acid in sulphuric acid, formed in the lead-chamber process) fumes and nitric acid results. Generally speaking, a coating of „Plumbol“ paint affords the same protection as a coating of metallic lead the same thickness.
    Notes: Die Zahl der verwendungsfähigen metallischen Pigmente in Rostschutzfarben ist gering. Feinstgepulvertes Blei zeigt sich allen übrigen Metallen überlegen. Erforderlich ist bei Bleiverwendung ein dem Pigment vollkommen angepaßter Bindemittelzusatz. Chlorkautschuk hat sich hier besonders bewährt. Man erzielt durch den „Plumbol“-Pinselaufstrich gleichsam eine „Verbleiung„ des Eisens. Im Effekt ist ein einmaliger Aufstrich einer 3-4 - fachen Ölfarbauflage ebenbürtig.  -  Bewitterungsversuche zeigen vergleichsweise die wesentlich bessere Schutzwirkung der „Pinselverbleiung“ gegenüber den üblichen Ölanstrichen. Der Schutz erweist sich gegen chemische Agentien (Natronlauge, Kalilauge, schweflige Säure, Schwefelsäure, Essigsäure und andere verdünnte kalte Säure, Schwefelsäure, Essigsäure und andere verdünnte kalte Säure, Essigsäure und andere verdünnte kalte Säuren) als äußerst widerstandsfähig. Nicht jedoch gegen nitrose Gase und Salpetersäure.  -  eine „Plumbol“- Anstrich-Folie bietet im im allgemeinen den gleichen Schutz wie eine Schicht von metallischem Blei gleicher Dicke.
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 237-237 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. I 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 178-182 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
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    Keywords: Chemistry ; Polymer and Materials Science
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    Description / Table of Contents: Temporary Anti-corrosive MeasuresThe article opens with a survey of the various methods employed for ensuring temporary protection against rust. The following points are then discussed:  -  creation of a non-corrosive ambient atmosphere, use of special removable protective coatings (having an oil, wax or patty base). Particular attention is paid to the use of Dicyclorhexylammonium nitrite (VPI) and to modern anticorrosion compounds having a mineral oil base. Some practical examples of the application of these protective coatings for interior and exterior surfaces are included. The removal of such coatings is then discussed. The article closes with a brief discussion on tests suitable for testing temporary anti-corrosive compounds. A compendious bibliography on the subject is appended.
    Notes: Es wird eine Übersicht über die verschiedenen Methoden des temporären Rostschutzes gegeben. Behandelt werden: Schaffung einer nicht angreifenden Atmosphäre  -  Verwendung geeigneter Schutzüberzüge (abziehbar und auf der Basis von Ölen, Wachsen und Fetten). Besonders eingegangen wird auf den Schutz durch Dicyclohexylammoniumnitrit (VPI) und auf moderne Rostschutzmittel auf der Mineralölbasis. Praktische Beispiele für die Anwendung dieser Rostschutzmittel für innere und äußere Oberflächen werden angegeben. Dann wird die Entfernung der Überzüge besprochen. Zum Schluß werden verschiedene Kurzprüfungen für temporäre Rostschutzmittel diskutiert und das ziemlich umfangreiche Schrifttum angegeben.
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 182-184 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 192-194 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 196-196 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 197-197 
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 271-274 
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 277-277 
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 418-420 
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 422-424 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 425-430 
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    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: Reactions in the Intermediate Stratum between Iron and Coating Systems and the Effect of InhibitorsCorrect surface pre-treatment of iron and steel is regarded as irremissible for good performance and maximum service life of a coating system in corrosion control. The peculiar features of surface texture are characterized by a mosaic of anodic and cathodic ranges. Industry's tendency to speed up every process to the utmost calls for quick drying paints. Their wetting properties and their water permeability determine adhesion characteristics and electrochemical attack. Therefore, the paint chosen has to correspond with the pre-treatement applied to the surface or vice versa. The addition of suitable inhibitors contributes to the efficiency and performance of the coating. Combinations of inhibitors with ionadsorbing film-forming materials create an active intermediate stratum between metal and paint, improving adhesion and preventing corrosion. The development of a special surface-technology is necessary for pursuing the aim of prolonging the life of steel structures and/ or reducing maintenance costs, even under the most severe service conditions.
    Notes: Eine fachgemäße Vorbehandlung der Oberfläche von Eisen und Stahl, die als Mosaik anodischer und kathodischer Bereiche aufgefaßt werden kann, ist für dauerhafte Rostschutzanstriche eine unerlässliche Vorbedingung. Das moderne Fertigungstempo zwingt die Industrie zur Verwendung rasch trocknender Anstriche; deren Benetzungsvermögen bedingt die Haftung und deren Wasserdurchlässigkeit die elektrochemischen Vorgänge in der Grenzschicht. Die Anstriche müssen also der Vorbehandlung des Eisens entsprechen, oder diese Vorbehandlung hat sich nach den gewählten Anstrichmitteln zu richten. Zusatz geeigneter Hemmstoffe verbessert die Rostschutzwirkung erheblich. Kombinationen von Hemmstoffen mit ionenabsorbierenden Filmbildern führen zu aktiven Zwischenschichten, die zur Erhöhung der Haftfestigkeit und zur Verhütung von Unterrostungen beitragen. Schließlich wird eine Oberflächen-Technologie postuliert, die sich die Verlängerung der Lebensdauer von Stahlkonstruktionen und/oder eine Verminderung ihrer Unterhaltskosten, auch unter schwierigsten äußeren Bedingungen, zum Ziel setzt.
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 237-237 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 244-246 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Description / Table of Contents: The Influence of Soil Dampness on the Velocity of Corrosion of Iron and lead in the EarthThe rate of corrosion of Iron and Lead was examined with respect to the element Pt/dam soil/base metal. It was found that, in sandy and clay sols, there are two varieties of corrosion, namely active behaviour of Iron and passive behaviour of Lead.
    Notes: Die Korrosionsgeschwindigkeit von Eisen und Blei wurde an dem Element Pt/feuchter Boden/unedleres Metall untersucht. Dabei ergab sich, daß in sand- und tonhaltigem Boden zwei Korrosionsarten zu unterscheiden sind, nämlich ein aktives Verhalten des Eisens und ein passives Verhalten des Blei.
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 251-257 
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    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: The Roof and its problems, with Special Reference to Flat RoofsThe demands of Builders and Users that a roof is required to meet, have changed decisively during the last decades. The disappearance of garrets, the use of flat roofs and present-day sawtoothed roofs required that a number of additional precautions be observed, which are supplemented by recognition of thier constructional and utilisation limitations. Some of the most important demands of to-day, such as minimum constructional requirements, heat retention, limitations of roof characteristics, properties of materials and desirable developments are indicated. Special emphasis is laid on the various effects of dampness and their prevention. The importance of the structure of the roof and ventilation are also emphasised.
    Notes: Die baulichen und benutzungsmäßigen Anforderungen an das Dach haben sich in den letzten Jahrzehnten in entscheidenden Teilen gewandelt. Wegfall des Dachraumes, Flachdächer und neuzeitlich Sägedachformen (Sheds) bedingen eine Reihe zusätzlicher Vorkehrungen, die ergänzt werden durch neue Erkenntnisse über konstruktive und benutzungsmäßige Bedingtheiten. Einige der wichtigsten neuen Forderungen, wie Konstruktions-Mindestforderungen, Wärmedämmung, Wärmestau, Abgrenzung der Dacheigenschaften, Material-Eigenschaften und erwünschte Entwicklungen werden aufgezeigt. Besonderer Nachdruck wird auf die unterschiedlichen Formen der Feuchtigkeitseinwirkungen und ihrer Abwehr gelegt und die Bedeutung ausreichender Dachaufgliederung und Lüftung nachgewiesen.
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 266-267 
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 269-271 
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 19-20 
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 26-28 
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 37-37 
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 38-38 
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 40-40 
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 56-56 
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 72-74 
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 84-87 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Description / Table of Contents: Cathodic corrosion PreventionThe article opens with a short definition of the term „Cathodic Corrosion Prevention“ and then describes the possibilities and limits of the application of cathodic protection by the use of outside current supplies in conjunction with an auxiliary insoluble anode. The appearance of cathodic corrosion, which limits the possibilities of this method of corrosion prevention, is described in detail.The results of tests made with iron and aluminum which was subjected to various representative forms of corrosion are given. The current required per sq. metre and per annum, as determined from these tests, forms a criterion for the cost of cathodic corrosion protection.
    Notes: Nach einer kurzen Definition des Begriffes „kathodischer Korrosionsschutz“ wird auf die Möglichkeiten und Grenzen der Anwendung des kathodischen Schutzes mit einer äußeren Stromquelle und einer unlöslichen Hilfsanode hingewiesen. Die Erscheinung der „kathodischen Korrosion“, die die Möglichkeiten der Anwendung des kathodischen Schutzes begrenzt, wird eingehend besprochen.Versuche mit Eisen und Aluminum in einigen typischen Korrosionsmitteln werden mitgeteilt, wobei der Bedarf an elektrischer Energie je m2 und Jahr einen Anhaltspunkt für die Kosten des kathodischen Schutzes gibt.
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 81-83 
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    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Description / Table of Contents: The Influence of the condition of the Surface of Iron upon the Rapidity of Corrosion when buried in SoilExperiments were made to determine the action of various soils sand, clay and loam upon elements Ferough (damp soil) Fe smooth and Ferough (soils I/II) Fesmooth. Current measurements made with element Ferough (damp soil) Fesmooth demonstrated that the reversal of direction of the current, which is dependent on the dampness of the soil, only takes place between very narrow limits. These limits are correlated to the point at which the soil saturated with water goes over to the unsaturated state.The period of time in which the potential difference between two electrodes of varying surface condition (Ferough Fesmooth) placed in soil, disappears after a definite quantity of electrolyte has been added, could be plotted as characteristic curves. Such curves could give information upon the increased soil activity.
    Notes: Messungen über die unterschiedliche Bodenaggressivität (Sand, Ton und Lehm) wurden mit den Elementen Ferauh (feuchter Boden) Feglatt durchgeführt. Stromstärkemessungen mit dem Element Ferauh (feuchter Boden) Feglatt ergaben, daß Umkehr der Stromrichtung, die von der Feuchtigkeit des Bodens abhängt, nur in einem sehr engen Feuchtigkeitsbereich stattfindet, der dem Übergang von mit Wasser gesättigtem in den ungesättigten Boden zugeordnet ist.Die Zeit, in welcher das Potential zwischen zwei Elektroden verschiedener Oberflächenbeschaffenheit (Ferauh, Feglatt) in einem Boden nach Zufügen einer bestimmten Elektrolytmenge verschwindet, dürfte charakteristische Kurven ergeben, die Aufschluß über eine vergrößerte Bodenaggressivität liefern.
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 92-94 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Description / Table of Contents: The Basic Causes of “Short” Fractures in MetalsThis article forms a report on various lectures delivered at a Meeting which was held to determine the present extent of knowledge of “short” fractures. The lectures were published in Nos. 415 (1953) of the “Raeder Rundschau”, and dealt exhaustively with the phenomena of “short” fractures of various metals in use in industry, as well as of welded and non-welded components. The lectures also included a survey of the causes of “short” fractures as far as present-day knowledge and the various theories on fractures permitted. In addition, various important questions regarding the various methods of testing metals for their liability to short fracture “are discussed”.
    Notes: Referat über Vorträge anläßlich einer Tagung über den heutigen Stand des Sprödbruchproblems.  -  Die in Heft 4/5 (1953) der „Radex-Rundschau“ veröffentlichten Vorträge behandelten das grundsätzliche Erscheinungsbild des spröden Bruches bei verschiedenen metallischen Werkstoffen, ungeschweißten und geschweißten Konstruktionsteilen und gaben eine Uebersicht über die Entstehung von spröden Brüchen, soweit sie nach unseren heutigen Kenntnissen und Anschauungen über den Aufbau der metallischen Werkstoffe und auf Grund der Bruchtheorien abgeleitet werden könne. Ferner wurde auch eingehend die technisch wichtige Frage der Prüfverfahren zur Feststellung der Sprödbruchempfindlichkeit eines Werkstoffes erörtert.
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 104-106 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 98-104 
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 87-92 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Description / Table of Contents: Contributions to the Theory of Chemical Polarisation during Solution, Separation and Overstressing of MetalsIt was shown that the appearance of surface layers is an essential factor in the chemical polarisation which occurs during the solution, separation, overstressing, inhibitory action, polishing and passivity of metals. The surface layers exercise a restraining effect on the adjustment of the equilibrium of association. These layers are to be found on practically all metals and even in solutions which are capable of dissolving the material of which the layers are composed. They are created by a slowing down in the speed of the diffusion of the ions necessary for the dissolving of the metal in relation to the more rapid formation of layers on the surface of the metal. Such surface layers differ from the usual macromolecular surface layers, such as oxides or scale, rust, salts, etc., in their solubility. Their formation continues at a very high reproductive rate, even though the top layers are removed, and they form an indication of the behaviour of the metal in solutions after it has been subjected to suitable preliminary treatment. In contra-distinction to the irreversible macro-molecular surface layers, the afore-mentioned layers can be regarded as being reversible micro-molecular coverings.
    Notes: Es wird gezeigt, daß das Auftreten von Deckschichten ein wesentlicher Faktor bei der chemischen Polarisation, bei der Auflösung oder Abscheidung von Metallen, bei der Überspannung, Inhibitorwirkung, Glanzwirkung und Passivität ist. Die Deckschichten bewirken eine Hemmung der Gleichgewichtseinstellung. Sie sind auf praktisch allen Metallen und selbst in solchen Lösungen vorhanden, die an sich befähigt wären, die Deckschichtsubstanz aufzulösen. Sie entstehen durch eine geringere Geschwindigkeit des Diffusionsvorgangs, der für die Metallauflösung erforderlichen Ionen im Vergleich zur schnelleren Deckschichtenbildung unmittelbar auf der Metalloberfläche. Derartige Deckschichten unterscheiden sich wesentlich von den bekannten makromolekularen Deckschichten wie Oxyd- oder Zunderschichten, Rost, Salzschichten usw. durch ihre verschiedene Löslichkeit. Sie bilden sich selbst nach ihrer Entfernung immer wieder und zwar sehr gut reproduzierbar nach und sind ein Kennzeichen für das Metall hinsichtlich seines Verhaltens bei einer bestimmten Vorbehandlung in einer bestimmten Lösung. Sie können im Gegensatz zu den irreversiblen makromolekularen Deckschichten als reversible, mikromolekulare Bedeckungen angesehen werden.
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 94-98 
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    Keywords: Chemistry ; Polymer and Materials Science
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    Description / Table of Contents: Preparation and Passivation of light metals for paintingAluminum and magnesium alloys are forming natural oxide films, the strengthening of which is performed by several methods of chemical and electrolytic oxidation. Light metals are also protected by insoluble films of metal salts (phosphate films) in a similar manner as the iron metals. In recent years a new method was developed whereby metal organic protective films are produced by using so-called reaction primers (wash primers). All these protective films are functioning likewise as anticorrosive coatings and as adhesive substrates for paint and lacquer coatings.
    Notes: Aluminium- und Magnesium-Legierungen bilden an der Luft natürliche Oxydhäute, deren Verstärkung durch die verschiedenen Verfahren der chemischen und elektrolytischen Oxydation der Leichtmetalle angestrebt wird. Außer durch die unlöslichen Oxydschichten werden Leichtmetalle ebenso wie Eisenmetalle auh durch unlösliche Metallsalzschichten (Phosphatfilme etc.) geschützt. Auch die durch die sog. Reaktionsprimer oder Metallwandler erzeugten metallorganischen Deckschichten werden als antikorrosive Überzüge und Haftgründe für die nachfolgende Lackierung angewendet.
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 107-110 
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 117-117 
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 118-118 
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. I 
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    Description / Table of Contents: Quartz Bricks and BlocksAt first only hollow-ware (tubes, vessels, etc.) suitable for the needs of the chemical and allied industries, was manufactured from quartz produced by fusing pure quartz sand. The production of solid articles was neglected, since the advantages of the non-porous structure, combined with its heat and chemical resistant properties, which protect quartzware from the action of pulverised, liquid and gaseous agents, was only realised later. It was the initiative of users which led to the production of quartz bricks, which were used in copper works, Siemens-Martin furnaces chemical works and certain specialised electric furnaces. These quartz bricks proved to be far superior to all other materials, but were found to be too small and too expensive. A well-known glassworks was successful in developing quartz bricks suitable for tank-linings, whereby a far superior quality of glass was obtained with less contamination, better colours and no bubbles, knots or streaks. The same type of brick was also found ot be of great use in chemical works. Quartz bricks and blocks were first produced by means of compressed resistance fusion and, later, by solid fusion, but in every case one fusion operation was required to produce one brick or block. Nowadays blocks are produced by cutting up billets of large cross-sectional area, so that they can be produced in large quantities at economic prices for all purposes where their application has proved successful.
    Notes: Quarzgut, erschmolzen aus reinem Quarzsand, wurde entsprechend den chemischen und ähnlichen Bedürfnissen vorwiegend als Hohlkörper (Rohre, Gefäße, u. ä.) hergestellt,  -  Vollkörper wurden vernachlässigt,  -  die Vorteile der nichtporösen Struktur wurden erst spät erkannt, die verbunden mit der thermischen und chemischen Festigkeit Quarzgut vor dem Angriff staubförmiger, flüssiger und gasförmiger Agenzien schützt. Erst Verbraucher-Initiative führte zum Quarzgut-Stein, der sich in Kupfer-Raffinier-, in Siemens-Martin-, in Spezial-Elektro-Öfen wie in chemische Analgen eingesetzt, allen anderen Stoffen überlegen erwies, aber zu klein und zu teuer war. Eine bekannte Glashütte entwickelte mit Erfolg den Quarzgut-Wannenstein und erzielte damit weit bessere Gläser,  -  weniger Verunreinigungen, bessere Farben, keine Blasen, Knoten, Schlieren! Der gleiche Stein bewährte sich dann auch für Chemische Großanlagen.  -  Quarzgut-Steine entstanden zunächst aus gepreßten Ein- oder Mehrstab-Widerstandsschmelzen, später aus Vollkörper-Schmelzen, doch ergab eine Schmelze nur einen Block. Heute können Blöcke von einem querschnitts-großen Strang abgetrennt und zerteilt werden,  -  so ist Massen-Herstellung zu billigen Preisen für alle erprobten Zwecke möglich.
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 141-147 
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 157-157 
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 168-172 
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    Description / Table of Contents: The Prevention of Water Corrosion in RefineriesThe protection of equipment against the corrosive effects of water is problem that affects underground storage tanks, boilers and other equipment. The degree of corrosion depends essentially on factors such as the presence and nature of im-purities in the water, temperatures prevailing in the system and the velocity of the flowing water. The following methods of corrosion prevention are discussed:  -  cathodic protection, organic coatings (paints), metallic coatings, the addition of corrosion retardants, pretreatment of the water (de-aeration) and choice of suitable metals or alloys as materials of construction.
    Notes: Der Korrosionsschutz von Anlagen gegen Wasser tritt in vielfältiger Gestalt auf, bei unterirdischen Lagertanks, Dampfkesseln und Freikonstruktionen. Für die Stärke des korrosiven Angriffes sind hierbei wesentlich maßgebend die Gegenwart und Natur von Verunreinigungen, die temperatur des Systems und die Strömungsgeschwindigkeit des Wassers. Von den Verfahren zur Korrosionskontrolle werden behandelt: Kathodischer Schutz, organische Überzüge (Anstriche), metallische Überzüge, Hemmstoffzusätze, Änderung der Umgebung durch Vorbehandlung (Entlüftung) der Wässer und Wahl geeigneter Metalle bzw. Legierungen.
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 194-195 
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 197-197 
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    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 223-224 
    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
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 230-233 
    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
    Type of Medium: Electronic Resource
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 235-236 
    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
    Type of Medium: Electronic Resource
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 238-240 
    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
    Type of Medium: Electronic Resource
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954) 
    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
    Type of Medium: Electronic Resource
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. I 
    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
    Type of Medium: Electronic Resource
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 398-401 
    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
    Type of Medium: Electronic Resource
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    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 5 (1954), S. 408-409 
    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
    Type of Medium: Electronic Resource
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