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  • crystal structure  (4)
  • 23Na NMR  (2)
  • Feldmannia
  • 1
    Electronic Resource
    Electronic Resource
    Virus infections in three marine brown algae: Feldmannia irregularis, F. simplex, and Ectocarpus siliculosus (1993)
    Springer
    Hydrobiologia 260-261 (1993), S. 37-44 
    Details
    ISSN: 1573-5117
    Keywords: Virus infection ; marine ; Phaeophyceae ; Feldmannia ; Ectocarpus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Culture studies with healthy and virus-infected isolates of Ectocarpus siliculosus, Feldmannia simplex and F. irregularis gave the following results: Virus particles are produced in deformed reproductive organs (sporangia or gametangia) of the hosts and are released into the surrounding seawater. Their infective potential is lost after several days of storage under laboratory conditions. New infections occur when gametes or spores of the host get in contact with virus particles. The virus genome enters all cells of the developing new plant via mitosis. Virus expression is variable, and in many cases the viability of the host is not impaired. Infected host plants may be partly fertile and pass the infection to their daughter plants. Meiosis of the host can eliminate the virus genome and generate healthy progeny. The genome of the Ectocarpus virus consists of dsDNA. Meiotic segregation patterns suggest an intimate association between virus genome and host chromosomes. An extra-generic host range has been demonstrated for the Ectocarpus virus. Field observations suggest that virus infections in ectocarpalean algae occur on all coasts of the world, and many or all Ectocarpus and Feldmannia populations are subject to contact with virus genomes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00049001
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  • 2
    Electronic Resource
    Electronic Resource
    Transfer of a marine DNA virus fromEctocarpus toFeldmannia (Ectocarpales, Phaeophyceae): aberrant symptoms and restitution of the host (1993)
    Springer
    Protoplasma 175 (1993), S. 121-125 
    Details
    ISSN: 1615-6102
    Keywords: Ectocarpus ; Feldmannia ; Phaeophyceae ; DNA-virus, marine ; Intergeneric gene transfer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The marine brown algaEctocarpus siliculosus is invaded by a polyhedric virus, whose genome consists of circular, double-stranded DNA. In laboratory experiments this virus can infect a different host species,Feldmannia simplex. InfectedFeldmannia plants show severe somatic malformations. However, no functional virus particles are formed. SuchFeldmannia plants recover to resume a normal, symptom-free appearance. This result raises the possibility of intergeneric gene transfer in the natural habitat.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01385009
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  • 3
    Electronic Resource
    Electronic Resource
    Die Kristallstruktur des Natriumoxohydroxoaluminathydrates Na2[Al2O3(OH)2] · 1,5 H2O (1995)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 679-684 
    Details
    ISSN: 0044-2313
    Keywords: Sodium oxohydroxoaluminate hydrate ; Na2[Al2O3(OH)2] · 1.5 H2O ; crystal structure ; 27Al NMR ; 23Na NMR ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Crystal Structure of the Sodium Oxohydroxoaluminate Hydrate Na2[Al2O3(OH)2] · 1.5 H2OThe crystal structure of the sodium oxohydroxoaluminate hydrate Na2[Al2O3(OH)2] ·s 1.5 H2O (up to now described as Na2O · Al2O3 · 2.5 H2O and Na2O · Al2O3 · 3 H2O, respectively) was solved. The X-ray single crystal diffraction analysis (tetragonal, space group P-421m, a = 10.522(1) Å, c = 5.330(1) Å, Z = 4) results in a polymeric layered structure, consisting of AlO3/2(OH) tetrahedral groups. Between these layers the Na+ ions are situated, which form tetrameric groups of face-linked NaO6 octahedra. The involved O2- ions are due to Al—O—Al bridges, Al—OH groups and water of crystallization. 27Al and 23Na MAS NMR investigations confirm the crystal structure analysis. The relations between the crystallization behaviour of the compound and the constitution of the aluminate anions in the corresponding sodium aluminate solution and in the solid, respectively, are discussed.
    Notes: Die Kristallstruktur des Natriumoxohydroxoaluminathydrates Na2[Al2O3(OH)2] · 1,5 H2O - bisher in der Literatur als Na2O · Al2O3 · 2,5 H2O bzw. Na2O · Al2O3 · 3 H2O bezeichnet - wird bestimmt. Die Einkristallröntgenstrukturanalyse (tetragonal, Raumgruppe P-421m, a = 10,522(1) Å, c = 5,330(1) Å, Z = 4) ergibt eine aus AlO3/2(OH)-Tetraedern aufgebaute, polymere Schichtstruktur. Die zwischen den Schichten angeordneten Na+-Ionen bilden mit O2--Ionen von Al—O—Al-Brücken, Al—OH-Gruppen und von Kristallwasser NaO6-Oktaeder, die über gemeinsame Flächen zu tetrameren Baugruppen verknüpft sind. 27Al- und 23Na-MAS-NMR-Messungen bestätigen die Kristallstrukturanalyse. Die Beziehungen zwischen dem Kristallisationsverhalten der Verbindung und der Konstitution der Aluminatanionen in der entsprechenden Natriumaluminatlösung bzw. in der kristallinen Verbindung werden diskutiert.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19956210430
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  • 4
    Electronic Resource
    Electronic Resource
    Über kristalline Natriumhydroxogallate (1997)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 1483-1488 
    Details
    ISSN: 0044-2313
    Keywords: Nonasodium bis(hexahydroxogallate) trihydroxide hexahydrate ; decasodium bis(hexahydroxogallate) tetrahydroxide ; disodium tetrahydroxogallate chloride ; crystal structure ; 71Ga MAS NMR ; 23Na MAS NMR ; DTA, DTG, guinier lenné technique ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: About Crystalline Sodium HydroxogallatesTwo crystalline sodium hydroxogallates 4,5 Na2O · Ga2O3 · 13,5 H2O (I) and 5 Na2O · Ga2O3 · 8 H2O (II), as well as a crystalline phase of the composition Na2O · Ga2O3 · 4 H2O · 2 NaCl (III) are described.
    Notes: Es werden zwei kristalline Natriumhydroxogallate 4,5 Na2O · Ga2O3 · 13,5 H2O (I) und 5 Na2O · Ga2O3 · 8 H2O (II) sowie eine kristalline Phase der Zusammensetzung Na2O · Ga2O3 · 4 H2O · 2 NaCl (III) beschrieben.(I) kristallisiert aus Natriumgallatlösungen eines breiten Konzentrationsfeldes und hat nach Einkristallröntgenstrukturanalyse [1] eine dreidimensional vernetzte Struktur aus monomeren [Ga(OH)6]3--Anionen, die über NaO6-Koordinationspolyeder untereinander verbunden sind; daneben sind Kristallwasser und weitere Hydroxidionen enthalten.Damit ist (I) als Nonanatrium-bis(hexahydroxogallat)-trihydroxid-hexahydrat (Na9[Ga(OH)6]2(OH)3 · 6 H2O) zu formulieren; Isotypie besteht zu dem entsprechenden Natriumhydroxoaluminat [2, 3]. 5 Na2O · Ga2O3 · 8 H2O II) läßt sich aus (I) in Gegenwart von Natriumhydroxid durch Entwässern über P4O10 bei Raumtemperatur unter Schutzgas (N2) erhalten. Es kristallisiert tetragonal, ist isotyp mit Na10[Al(OH)6]2(OH)4 [4] und dementsprechend als Na10[Ga(OH)6]2(OH)4 zu formulieren. Durch Zusatz von Natriumchlorid zu Natriumgallatlösungen läßt sich Na2O · Ga2O3 · 4 H2O · 2 NaCl (III) isolieren, das ebenfalls tetragonal und isotyp zu Na2[Al(OH)4]Cl [5] ist. Es handelt sich demnach um das Dinatriumtetrahydroxogallatchlorid Na2[Ga(OH)4]Cl. Die Ergebnisse der 71Ga- und 23Na-MASNMR-Messungen an den Verbindungen (I) bis (III) und deren thermisches Verhalten werden diskutiert.(I) crystallizes from sodium gallate solutions in a wide concentration field; from the X-ray single crystal diffraction analysis [1] results a three dimensional network structure, consisting of monomeric [Ga(OH)6]3- anions connected by NaO6 octahedra groups. Furthermore the structure contains water of crystallization and further hydroxide ions. (I) has to be formulated as nonasodium bis(hexahydroxogallate) trihydroxide hexahydrate Na9[Ga(OH)6]2(OH)3 · 6 H2O; it is isotypic with the corresponding sodium hydroxoaluminate [2, 3]. 5 Na2O · Ga2O3 · 8 H2O (II) was obtained from (I) in presence of sodium hydroxide by dehydration over P4O10 in an inert atmosphere (N2) at room temperature. (II) crystallizes tetragonally and is isotypic with Na10[Al(OH)6]2(OH)4 [4]. Accordingly it could be described as a decasodium bis(hexahydroxogallate) tetrahydroxide, Na10[Ga(OH)6]2(OH)4. Na2O · Ga2O3 · 4 H2O · 2 NaCl (III) was obtained by addition of sodium chloride to sodium gallate solutions, (III) crystallizes also tetragonally and is isotypic with (Na2[Al(OH)4]Cl [5]. Correspondingly, it has to be formulated as disodium tetrahydroxogallate chloride Na2[Ga(OH)4]Cl. The results of 71Ga and 23Na MAS NMR investigations of the compounds (I) to (III) and their thermal behaviour are discussed.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19976230925
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  • 5
    Electronic Resource
    Electronic Resource
    Zur Kenntnis des Natrium-tetrahydroxoaluminat-chlorids Na2[Al(OH)4]Cl (1994)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 771-776 
    Details
    ISSN: 0044-2313
    Keywords: Tetrahydroxoaluminate chloride, Na2[Al(OH)4]Cl ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Sodium Tetrahydroxoaluminate Chloride Na2[Al(OH)4]ClThe hitherto unknown compound Na2[Al(OH)4]Cl was prepared by crystallisation from a NaCl containing sodium aluminate solution. According to the X-ray single crystal investigation (tetragonal, space group P4/nmm, a = 7.541 Å, c = 5.059 Å, Z = 2) the compound represents the first example of a crystalline hydroxoaluminate with monomeric [Al(OH)4]- anions. Cl- shows a quadratic anti prismatic coordination to 4 Na+ and over hydrogen bonds to 4 O2- while Na+ is octahedrally coordinated by 4 O2- and 2 Cl- (axial). The results of the crystal structure analysis are confirmed by 27Al and 23Na MAS NMR investigations. Na2[Al(OH)4]Cl decomposes at about 200°C without intermediates under formation of β-NaAlO2 and NaCl.
    Notes: Die bisher unbekannte Verbindung Na2[Al(OH)4]Cl wurde durch Kristallisation aus mit NaCl versetzter Natriumaluminatlösung erhalten. Entsprechend der Röntgenstrukturanalyse an einem Einkristall (tetragonal, Raumgruppe P4/nmm, a = 7,541 Å, c = 5,059 Å, Z = 2) liegt mit dieser Verbindung erstmals ein Beispiel für ein kristallines Hydroxoaluminat mit monomeren [Al(OH)4]--Anionen vor. Cl- ist quadratisch antiprismatisch mit 4 Na+ sowie über Wasserstoffbrückenbindungen mit 4 O2- koordiniert, während Na+ oktaedrisch von 4 O2- und 2 Cl- (axial) umgeben ist. Die Ergebnisse der Kristallstrukturanalyse werden durch 27Al- und 23Na-MAS-NMR-Messungen bestätigt. Na2[Al(OH)4]Cl zersetzt sich ohne Zwischenprodukte bei 200°C zu β-NaAlO2 und NaCl.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19946200432
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  • 6
    Electronic Resource
    Electronic Resource
    Nonanatrium-bis(hexahydroxoaluminat)-trihydroxid-hexahydrat (Na9[Al(OH)6]2(OH)3 · 6H2O) - Kristallstruktur, NMR-Spektroskopie und thermisches Verhalten (1996)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 1799-1805 
    Details
    ISSN: 0044-2313
    Keywords: Nonasodium bis(hexahydroxoaluminate) trihydroxide hexahydrate ; Na9[Al(OH)6]2(OH)3 · 6H2O ; crystal structure ; 27Al NMR ; 23Na NMR ; DSC ; DTG ; hydrogen bond ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Nonasodium Bis(hexahydroxoaluminate) Trihydroxide Hexahydrate (Na9[Al(OH)6]2(OH)3 · 6H2O) - Crystal Structure, NMR Spectroscopy and Thermal BehaviourThe crystal structure of the nonasodium bis(hexahydroxoaluminate) trihydroxide hexahydrate Na9[Al(OH)6]2(OH)3 · 6H2O (4.5 Na2O Al2O3 · 13.5 H2O) (up to now described as 3 Na2O · Al2O3 · 6H2O, 4Na2O · Al2O3 · 13 H2O and [3 Na2O · Al2O3 · 6H2O] [xNaOH · yH2O], respectively) was solved. The X-ray single crystal diffraction analysis (triclinic, space group P1, a = 8.694(1) Å, b = 11.344(2) Å, c = 11.636(3) Å, α = 74.29(2)°, β = 87.43(2)°, γ = 70.66(2)°, Z = 2) results in a structure, consisting of monomeric [Al(OH)6]3- aluminate anions, which are connected by NaO6 octahedra groups. Furthermore the structure contains both, two hydroxide anions only surrounded by water of crystallization and OH groups of [Al(OH)6]3- aluminate anions and a hydroxide anion involved in three NaO6 coordination octahedra directly and moreover connected with a water molecule by hydrogen bonding. The results of 27Al and 23Na-MAS-NMR investigations, the thermal behaviour of the compound and possible relations between the crystal structure and the conditions of coordination in the corresponding sodium aluminate solution are discussed as well.
    Notes: Die Kristallstruktur des Nonanatrium-bis(hexahydroxoaluminat)-trihydroxid-hexahydrates Na9[Al(OH)6]2(OH)3 · 6H2O (4,5 Na2O · Al2O3 · 13,5 H2O) - bisher in der Literatur als 3Na2O · Al2O3 · 6H2O, 4Na2O · Al2O3 · 13 H2O bzw. [3 Na2O · Al2O3 · 6H2O] [x NaOH · y H2O] bezeichnet - wurde bestimmt. Aus der Einkristallröntgenstrukturanalyse (triklin, Raumgruppe P1, a = 8,694(1) Å, b = 11,344(2) Å, c = 11,636(3) Å, α = 74,29(2)°, β = 87,43(2)°, γ = 70,66(2)°, Z = 2) ergibt sich eine Struktur aus monomeren [Al(OH)6]3--Aluminatanionen, die über NaO6-Koordinationsoktaeder untereinander verbunden sind. Die Struktur enthält weiter zwei Hydroxidionen, die koordinativ nur mit Kristallwasser und OH-Gruppen der [Al(OH)6]3--Aluminatanionen in Verbindung stehen, sowie ein drittes, das an drei NaO6-Koordinationsoktaedern beteiligt und außerdem über eine Wasserstoffbrückenbindung mit einem Wassermolekül verbunden ist. Die Ergebnisse von 27Al- und 23Na-MAS-NMR-Messungen, das thermische Verhalten der Verbindung sowie mögliche Beziehungen zwischen der Struktur der kristallinen Verbindung und den Koordinationsverhältnissen in der entsprechenden Natriumaluminatlösung werden diskutiert.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19966221027
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