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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 49 (1994), S. 0 
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: One hundred ASA grade 1 and 2 patients requiring orotracheal intubation for various general surgical procedures were randomly assigned to receive either expert rigid laryngoscopic or novice fibreoptic orotracheal intubation under total intravenous anaesthesia. Five anaesthesia residents in the 4th year, with no prior experience in fibreoptic laryngoscopy, participated in a fibreoptic training course, viewing two instructional videos and practising on the intubation manikin. Each resident intubated 20 patients in a randomised fashion either as an expert laryngoscopist or as a fibreoptic novice. The time (SEM) to achieve successful intubation was statistically different for fibreoptic and rigid intubation (77.2 (5.1) s vs 17.7 (1.6) s, p 〈 0.01). The time to achieve successful rigid laryngoscopic intubation remained constant over the ten intubations, whereas time required for fibreoptic intubation decreases significantly (p 〈 0.01). The learning objectives (fibreoptic intubation times in 60 s or less and with 90% or greater success rate on the first intubation attempt) were met by all residents. The haemodynamic profile was similar for fibreoptically intubated and conventionally intubated patients and there was no difference between the first two or the last two fibreoptive or rigid intubations. The study was designed to detect a difference of 10% in means (assuming β= 0.05 and 0.2). The incidence of postoperative sore throat, dysphagia or hoarsensess was similar in both groups. We conclude that routine fibreoptic orotracheal intubation in ASA grades 1 and 2 surgical patients is justifiable for teaching this valuable technique. since it increases clinical exposure to fibreoptic intubation, which should be learned and mastered by all anaesthetic residents by completion of their residency.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Thermochimica Acta 57 (1982), S. 309-315 
    ISSN: 0040-6031
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 663-669 
    ISSN: 0044-2313
    Keywords: Dicopper(I)-octa-μ3-halogeno-hexahalogeno-octahedro-hexamolybdate(II) ; crystal structure ; Mo6X14-group ; trigonal planar CuX3-group ; ionic conduction ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Trigonal Planar CuX3-Groups in Cu2Mo6X14, X = Cl, Br, ICu2Mo6Cl14 (I), Cu2Mo6Br14 (II) and Cu2Mo6I14 (III) were synthesized by thermal treatment of corresponding mixtures of copper(I) and molybdenum(II) halides. The crystal structures were determined by single crystal X-ray analyses. I and II show isotypism, cubic, Pn3 (no. 201, sec. setting), Z = 4, I: a = 12.772(3) Å, II: a = 13.350(2) Å. III shows a new structural type, orthorhombic, Pbca (No. 61), Z = 4, a = 16.058(3) Å, b = 10.643(2) Å, c = 16.963(3) Å. Trigonal planar CuX3 units were found in I—III. Structural behaviour relations are discussed, especially with regard to ionic conductivity.
    Notes: Cu2Mo6Cl14 (I), Cu2Mo6Br14 (II) und Cu2Mo6I14 (III) wurden durch thermische Behandlung der Gemenge der binären Halogenide CuX und Mo6X12 im molaren Verhältnis 2:1 in einkristalliner Form erhalten. Röntgenographische Strukturbestimmung wurde an Einkristallen durchgeführt. I und II zeigen Isotypie, Pn3 (Nr. 201, sec. setting) Z = 4, I: a = 12,772(3) Å, II: a = 13,350(2) Å. III weist eigenen Strukturtyp auf: Pbca (Nr. 61), Z = 4, a = 16,058(3) Å, b = 10,643(2) Å, c = 16,963(3) Å. In I—III liegen trigonal planare CuX3-Gruppen vor. Bindungsverhältnisse und Meßergebnisse der Ionenleitfähigkeit werden diskutiert.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 491 (1982), S. 191-198 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation and Crystal Structure of TlPb8O4Br9Analytical characterisation and crystal structure determination of TlPb8O4Br9 is reported. This compound is related with the “R-Phase” of the PbO/PbBr2-system. The difference between the reported compound and the “R-Phase” is shown, although their is accordance of the lattice constants. X-ray investigations yield the following crystallographic data: tetragonal system, space group P4/n (No 85), crystal axis a = 12.337, c = 8.214 Å. The crystal structure is described and the observation of the isolated structure group [Pb8O4]8+ is pointed out.
    Notes: Die Verbindung TlPb8O4Br9 wird analytisch charakterisiert und mit der sogenannten R-Phase des Systems PbO/PbBr2 verglichen. Die ermittelte Kristallstruktur wird vorgestellt und diskutiert. Bemerkenswert ist das Auftreten von diskreten Baugruppen [Pb8O4]8+, die untereinander durch eine Bromidionenumgebung abgeschirmt sind. Kristallographische Daten: Tetragonales Kristallsystem, Raumgruppe P4/n (No. 85), a = 12,337, c = 8,214 Å. Es wird ausgeführt, daß die für die R-Phase genannte Zusammensetzung trotz annähernd gleicher Metrik nicht für die vorliegende Verbindung zutreffen kann.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 550 (1987), S. 102-108 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation and Crystal Structure of Lead(II) MonoglycerolateCrystals of lead(II) monoglycerolate, of a quality suitable for diffraction studies, have been prepared from an alkaline plumbate solution and an excess of glycerol. The compound crystallizes in the monoclinic space group P21/c with a = 5.617(6) Å, b = 9.471(8) Å, c = 9.726(7) Å, β = 102.65(11)°. The structure was refined by full matrix least-squares techniques to an R value (1026 F0) of 0.078. The compound to which the formula Pb(C3H6O3) could be assigned, is polymeric in one direction. The lead and a part of the oxygen atoms built up a zig-zag chain parallel to the aaxis. The oxygen form a distorted tetragonal pyramid with lead at the apex. A decomposition temperature of 235°C has been determined.
    Notes: Blei(II)-monoglycerat kristallisiert monoklin (Raumgruppe P21/c) mit a = 5,617(6) Å, b = 9,471(8) Å, c = 9,726(7) Å, β = 102,65(11)° und Z = 4. Die Verfeinerung der Kristallstruktur mittels der Methode der kleinsten Fehlerquadrate ergab R = 0,078.Pb(C3H6O3) zeigt einen bemerkenswerten Aufbau. An der Koordination von Blei sind jeweils vier Glyceratdianionen beteiligt. Dabei heben sich Vierecke, die aus Blei und Sauerstoff gebildet werden, heraus. Diese Vierecke sind zickzackförmig miteinander verbunden und verlaufen parallel zur a-Achse. Untereinander sind diese eindimensional unendlichen Zickzackbänder durch die Glyceratreste abgeschirmt. Nach DTA-Untersuchungen ist die Zersetzungstemperatur von Blei(II)-monoglycerat 235°C.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 566 (1988), S. 62-70 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal Structure of AgPb4O4Cl, a Curious Variant of the Tetragonal Structure Type of PbOAgPb4O4Cl was prepared for the first time and the crystal structure was explored by single crystal measurement. The compound crystallizes with tetragonal symmetry in space group P4/n - No. 85 with a = 8.197(2) Å, c = 6.257(4) Å and two formulae per unit cell. The structure was refined by full matrix least-squares techniques to an R value of 0.049. AgPb4O4Cl shows a typical layer structure. Layers of Pb2+, Ag+ and O2- are separated by chloride layers. The crystal-chemical relations to the structural arrangement of the tetragonal modification of PbO is shown.
    Notes: AgPb4O4Cl wurde erstmalig dargestellt und die Kristallstruktur an Einkristallen aufgeklärt. AgPb4O4Cl kristallisiert tetragonal (Raumgruppe P4/n - No. 85) mit a = 8,197(2) Å, c = 6,257(4) Å und Z = 2. Die Verfeinerung der Einkristallmessung mittels der Methode der kleinsten Fehlerquadrate ergab den Gütefaktor Rw = 0.049. AgPb4O4Cl zeigt eine Schichtstruktur, wobei Chloridionen die Schichten aus Pb2+, Ag+ und O2- trennen. Die kristallchemische Beziehung zum Aufbau der tetragonalen Modifikation von PbO wird dargelegt.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 597 (1991), S. 151-161 
    ISSN: 0044-2313
    Keywords: Silver lead oxybromide ; crystal structure ; layer structure ; crystal chemistry ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: AgPbOBr  -  a New Sillén Type? Preparation and Crystal StructureAgPbOBr was prepared for the first time. Its crystal structure was explored by single crystal X-ray diffraction. AgPbOBr crystallizes with tetragonal symmetry in space group P 4/nmm - No. 129 with a = 3.891(1) Å, c = 11.07(1) Å and two formulas per unit cell. Least squares refinement yields an weighted R-value of 0.065. AgPbOBr shows a layered structure with components of the crystal structure of red PbO as well as AgBr. Emphasized differences between the crystal structures of AgPbOBr and the X2-types after Sillén's notation [1] are characteristic. AgPbOBr is the first member of a new structure type, arranged between Sillén- and Aurivilliusphases [2].
    Notes: AgPbOBr wurde erstmalig dargestellt und die Kristallstruktur an Einkristallen aufgeklärt. Es kristallisiert tetragonal (Raumgruppe P4/nmm  -  No. 129) mit a = 3,891(1) Å, c = 11,07(1) Å und z = 2. Die Verfeinerung (LSQ) der Einkristallmessung liefert Rw = 0,065. AgPbOBr ist schichtförmig aufgebaut mit aus PbO und AgBr bestehenden Bereichen, die nahezu unverändert dem Bau von PbO und AgBr gleichen. Die Unterschiede zur Kristallstruktur der Sillén-Phasen vom X2-Typ [1] sind charakteristisch. AgPbOBr nimmt kristallchemisch eine Stellung zwischen den Sillén- und den Aurivillius-Phasen [2] (z. B. BiOCl und γ-Bi2 WO6) ein.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 977-980 
    ISSN: 0044-2313
    Keywords: Mercury(II) lead(II) oxide chloride ; synthesis ; crystal structure ; structural comparison ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: HgPb2O2Cl2, a “Perforated” Lead(II) OxideSingle crystals of HgPb2O2Cl2 were grown in a HgCl2 flux by reaction of PbO with HgCl2. Crystal structure analysis by single crystal X-ray methods were carried out. HgPb2O2Cl2 crystallizes monoclinic with a = 11.788(2) Å, b = 3.910(1) Å, c = 7.749(2) Å, β = 122.64(3)°, space group C2/m (No. 12) and Z = 2. HgPb2O2Cl2 is the first member of a new structure type, closely related to the structure of PbO.
    Notes: Einkristalle von HgPb2O2Cl2 wurden durch Umsetzung von PbO und HgCl2 in HgCl2-Schmelzen gezüchtet. An ihnen wurde der Aufbau mittels Einkristallröntgenstrukturanalyse bestimmt. HgPb2O2Cl2 kristallisiert monoklin mit a = 11,788(2) Å, b = 3,910(1) Å, c = 7,749(2) Å, β = 122,64(3)°, Raumgruppe C2/m (Nr. 12) und Z = 2. HgPb2O2Cl2 ist der erste Vertreter eines neuen Strukturtyps, der kristallchemisch von der Struktur von PbO ableitbar ist.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 408 (1974), S. 205-208 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: About Ag6(SO4)(SiO4)Hitherto unknown Ag6(SO4)(SiO4) has been prepared at 400-500°C under an oxygen pressure more than 1000 atm. By single crystal X-ray work the structure of tetragonal Ag6(SO4)(SiO4) has been elucidated: a = 7.060, c = 17.660 Å; D4h19-141/amd; Z = 4. The crystal structure shows a new type in which the tetrahedrally sulfat- and silicat groups are definite distinguishable. As well the both crystallographic silver positions show a different crystal-chemical character.
    Notes: Neu dargestellt wurde Ag6(SO4)(SiO4) bei 400-500°C unter einem Sauerstoffdruck größer als 1000 atm. Nach röntgenographischen Untersuchungen der rubinroten Einkristalle kristallisiert die Verbindung tetragonal: a = 7,060, c = 17,660 Å; D4h19-141/amd; Z = 4. Die Kristallstruktur von Ag6(SO4)(SiO4) stellt einen neuen Strukturtyp dar, worin die tetraedrischen Sulfat- und Silicatgruppen deutlich unterscheidbar sind. Ebenso weisen die beiden kristallographischen Silberpositionen verschiedenartige kristallchemische Charaktere auf.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 432 (1977), S. 141-146 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal Structure of Tl3PbCl5Single crystals of the compound Tl3PbCl5 were prepared. Tetragonal symmetry with the lattice parameters a = 844.8 pm, c = 1 491.2 pm was shown by X-ray investigations. Tl3PbCl5 belongs to the space group P41 (No. 76). The crystal structure was solved by MULTAN and refined till R = 0.050. The metal particles are surrounded by seven chloride ions. This polyhedras are connected in a 3-dimensional way. Tl3PbCl5 shows a new structure type, without any constitutional relations to Cs3CoCl5 or (NH4)3ZnCl5.
    Notes: Die Verbindung Tl3PbCl5 wurde in Einkristallen dargestellt und röntgenographisch untersucht. Die Kristalle zeigen tetragonale Symmetrie mit a = 844,8 pm, c = 1 491,2 pm und sind der Raumgruppe P41 (No. 76) zuzuordnen. Die Kristallstruktur wurde mit MULTAN bestimmt und bis zu einem R-Wert von 0,050 verfeinert. Die Thallium- und Bleiteilchen sind von sieben Chloridionen umgeben. Die Koordinationspolyeder sind untereinander dreidimensional verknüpft. Tl3PbCl5 kristallisiert in einem neuen Bautyp, der keinerlei strukturelle Beziehung zu Cs3CoCl5 oder (NH4)3ZnCl5 zeigt.
    Additional Material: 2 Ill.
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