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  • 1
    Electronic Resource
    Electronic Resource
    Microfilariae in cytology smears: real culprits or trapped accidentally by needles? A study of 10 cases (2005)
    Oxford, UK : Blackwell Science Ltd
    Cytopathology 16 (2005), S. 0 
    Details
    ISSN: 1365-2303
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2303.2005.00281.x
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  • 2
    Electronic Resource
    Electronic Resource
    Vibrational analysis of the (B 2 П→X 2 П) system of NS (1963)
    Springer
    The European physical journal 173 (1963), S. 347-351 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A few red degraded bands attributable to NS have been reported earlier byFowler andBarker, Dressler andBarrow et al, and they occur in the same region (2300 to 2700 Å) as the bands of the known systems (C 2 ∑ +−X 2 П) and (A 2 Δ−X 2 П). Measurements made on the heads of some of these weak bands ledBarrow et al. to believe that these bands may form a system analogous to theβ-system of NO and be due to a2 П-2 П transition. The spectrum of NS has now been studied in a little more detail by means of an uncondensed discharge through dry nitrogen and sulphur vapour in the presence of argon and thirty three bands belonging to this system have been recorded in the region 2280 to 2760 Å. It has been found possible to represent the band heads by means of the equation $$^v {\text{head}} {\text{ = }} \left. {_{43182 \cdot 5}^{{\text{43311}} \cdot {\text{5}}} } \right\}_{ - [1219 \cdot 20(v'' + \tfrac{1}{2}) - 7 \cdot 48(v'' + \tfrac{1}{2})^2 ].}^{ + [761 \cdot 04(v' + \tfrac{1}{2}) - 5 \cdot 10(v' + \tfrac{1}{2})^2 ]}$$ . Taking the lower state doublet interval as 223 cm−1, it is shown that the separation in the upper state is 94 cm−1. The ratio of the force constants in the upper and the ground states is found to be 0·39 and is nearly the same as that in theβ-system of NO (0·30). The present vibrational analysis therefore supports the view that these new red degraded bands of NS arise from a (B 2 П→X 2 П) transition and the observed intensity distribution in the form of a wide parabola is also in qualitative agreement with what is expected from the moderately largeΔ r e (∼0·12Å) value.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01377832
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  • 3
    Electronic Resource
    Electronic Resource
    Oligomeric benzophenones as antioxidants for cellulose triacetate (1995)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 226 (1995), S. 47-52 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Filme aus Cellulosetriacetat wurden mit oligomeren 2-Hydroxy-4-alkoxybenzophenon-Derivaten stabilisiert und thermisch gealtert. Die oxidationshemmende Wirkung der oligomeren Stabilisatoren wurde durch Messung des Gewichtsverlusts, der Änderung von Carbonyl- und Hydroxy-Index sowie der Änderung der Bruchspannung und -dehnung ermittelt. Es wurde festgestellt, daß die Stabilisatorwirkung der oligomeren Benzophenone im allgemeinen besser ist als die der monomeren Vorstufen.
    Notes: Cellulose triacetate films stabilized with oligomeric 2-hydroxybenzophenone derivatives were subjected to oven ageing. The antioxidant efficiency of the oligomeric stabilizers was determined by carrying out measurements of percentage weight loss, change in carbonyl index and hydroxy index, and change in tensile strength and elongation at break. In general, the oligomeric benzophenones show better performance than their monomeric precursors in stabilizing cellulose triacetate.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1995.052260105
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  • 4
    Electronic Resource
    Electronic Resource
    Systematic study of ion-exchange properties and ligating behaviour of respropiophenone-formaldehyde copolymers (1989)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 165 (1989), S. 47-67 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Respropiophenon-Formaldehyd-Copolymere wurden durch Kondensation von 2,4-Dihydroxypropiophenon (Respropiophenon (RPP)) und Formaldehyd (F) in Gegenwart von NaOH oder H2SO4 als Katalysator mit unterschiedlichen molaren Anteilen der Monomeren hergestellt. Die Copolymeren wurden durch Elementaranalyse, IR-Spektroskopie, Viskositäts- und thermogravimetrische Untersuchungen charakterisiert. Ihr durchschnittliches Molekulargewicht wurde durch nichtwäßrige Leitfähigkeitstitrationen und Dampfdruckosmometrie bestimmt. Die Chelat-Ionenaustauscher-Eigenschaften wurden unter Anwendung der Batch-Gleichgewichtsmethod untersucht. Polychelate von Cu(II), Ni(II), Co(II), Mn(II), Zn(II), VO(II) und UO2(II) mit RPP-F-AI Copolymeren wurden horgestellt. Die analytischen Daten zeigen eine 1 : 2 Metall-Ligand-Stöchiometrie. Es wurden Elementaranalyse, magnetische, spektroskopische und thermische Eigenschaften der Polychelate ermittelt und mögliche Strukturen der Polychelate aufgezeigt. Alle Polychelate sind amorphe Pulver und unlöslich in den herkömmlichen organischen Lösungsmitteln.
    Notes: Respropiophenone-formaldehyde copolymers (RPP-F) were synthezised by the condensation of 2,4-dihydroxypropiophenone (respropiophenone (RPP)) and formaldehyde (F) in the presence of NaOH or H2SO4 as catalyst with varied molar ratios of reacting monomers. The copolymers were characterized by elemental analysis, IR spectra, viscosity, and TGA studies. Their M̄n was determined by nonaqueous conductometric titrations and vapour pressure osmometry (VPO). Chelation ion-exchange properties have also been studied employing the batch equilibration method. Polychelates of Cu(II), Ni(II), Co(II), Mn(II), Zn(II), VO(II), and UO2(II) with RPP-F-AI copolymer were prepared. The analytical data agree with 1 : 2 metal-ligand stoichiometry. Elemental analysis, magnetic, spectral, and thermal properties of polychelates have been studied and probable structures are assigned to the polychelates. All the polychelates are amorphous powders, insoluble in common organic solvents.
    Additional Material: 8 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1989.051650105
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  • 5
    Electronic Resource
    Electronic Resource
    Resacetophenone-formaldehyde resins, I. Metal chelates (1981)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 93 (1981), S. 1-10 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Es werden die Synthese und Eigenschaften eines Resacetophenon (2,4-Dihydroxiacetophenon)-Formaldehyd Harzes beschrieben. Das mittlere Molekulargewicht des Harzes, durch Dampfdruckosmometrie und wasserfreie konduktometrische Titration bestimmt, beträgt 2500 bzw. 2200 g/mol.Von diesem Harz wurden Cu(II)-, Ni(II)- und Co(II)-Chelate hergestellt. Die Elementaranalyse der Chelate ergab ein Verhältnis Metall : Ligand von 1:2. Aus den Reflexionspektren der Chelate konnte geschlossen werden, daß Ni(II)- und Co(II)-Chelate eine tetraedrische Struktur haben, während Cu(II)-Chelate eine quadratisch-ebene Struktur zeigen. Infrarotuntersuchungen zeigen, daß die Metalle über den Sauerstoff der Carbonyl-und Phenolgruppe gebunden sind. Auch die Anwesenheit von Methylenbrücken ist aus den IR-Messungen zu erkennen. Die thermischen Eigenschaften des Harzes und seiner Metallchelate werden diskutiert.
    Notes: Synthesis and properties of a resacetophenone-formaldehyde resin are described. The number average molecular weight of the resin determined by vapour pressure osmometry and nonaqueous conductometric titration is 2500 and 2200 g/mol, respectively.Cu(II), Ni(II) and Co(II) chelates of the resin were prepared. The elemental analysis of chelates indicated a metal to ligand ratio 1:2. From the diffuse reflectance spectra of the chelates it could be concluded that Ni(II) and Co(II) chelates have a tetrahedral structure while Cu(II) chelate has a square planar structure. Infrared spectral studies showed that the metals are co-ordinated through the oxygen of the carbonyl and phenolic groups. The presence of methylene bridges was also indicated from IR spectral studies. The thermal properties of the resin and its metal chelates are discussed.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1981.050930101
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  • 6
    Electronic Resource
    Electronic Resource
    Resacetophenone-formaldehyde resins, IIPart I cf. lit.5.. Chelation ion-exchange properties (1981)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 93 (1981), S. 11-17 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Resacetophenon-Formaldehyd-Harze erwiesen sich für verschiedene Metallionen als selektiv komplexierende Ionenaustauscherharze. Zur Bestimmung der Selektivität der Metallionenaufnahme wurde eine Gleichgewichts-batch-Methode angewandt. Die Methode beinhaltet die Messung der Verteilung eines gegebenen Metallions zwischen einer wäßrigen Lösung und dem Harz. Die Untersuchung wurde über einen weiten pH-Bereich und in Medien verschiedener Ionenstärke durchgeführt.
    Notes: The resacetophenone-formaldehyde (RAP-F) resin showed to be a selective chelating ion-exchange resin for certain metal ions. A batch equilibration method was used in the study of the selectivity of metal ion uptake. The method involved the measurement of distribution of a given metal ion between an aqueous solution and the resin. The study was carried out over a wide pH range and in media of various ionic strengths.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1981.050930102
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  • 7
    Electronic Resource
    Electronic Resource
    Resacetophenoneoxime-formaldehyde resins, IV. Chelation ion-exchange properties (1982)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 105 (1982), S. 75-81 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Resacetophenonoxim-Formaldehyd-Harze erwiesen sich für verschiedene Metallionen als selektiv komplexierende Ionenaustauscherharze. Zur Bestimmung der Selektivität wurde eine Gleichgewichts-batch-Methode angewandt. Die Methode beinhaltet die Messung der Verteilung eines gegebenen Metallions zwischen einer wäßrigen Lösung und dem Harz. Die Untersuchung wurde in einem weiten pH-Bereich und in Medien verschiedener Ionenstärke durchgeführt.
    Notes: Resacetophenoneoxime-formaldehyde resins showed to be selective chelating ion exchange resins for certain metal ions. A batch equilibrium method was used in the study of the selectivity of metal ion uptake. The method involved the measurement of distribution of a given metal ion between an aqueous solution and the resin. The study was carried out over a wide pH range and in media of various ionic strengths.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1982.051050108
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  • 8
    Electronic Resource
    Electronic Resource
    Resacetophenone oxime-formaldehyde resin and its metal chelates. III (1982)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 20 (1982), S. 205-212 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In this paper the synthesis and properties of resacetophenone oxime-formaldehyde resin are described. The number-average molecular weights of the resin determined by vapor-pressure osmometry and nonaqueous conductometric titration are 2200 ± 10% and 2500 g/mol, respectively. Cu(II), Ni(II), and Co(II) chelates of the resin were prepared. Elemental analysis of the chelates indicates a metal to ligand ratio of 1:2. The diffuse reflectance spectra and magnetic moments of Ni(II) and Co(II) chelates show tetrahedral structure, whereas Cu(II) chelate shows a square planar structure. Infrared spectral studies show that the metals are coordinated through the nitrogen of the oximino group and oxygen of the phenolic group. The presence of methylene bridges is also indicated by IR spectral studies. The thermal behavior of the resin and its metal chelates are also discussed.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1982.170200121
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