Go toArchive
Browse byFacets
Bookbag ( 0 )
'Manganese' in keywords
Results  32 Items
Sorted by   
Publication Year
2000 (2)
1998 (6)
1997 (3)
1996 (5)
1995 (3)
1991 (4)
1983 (1)
1980 (3)
1978 (3)
1977 (1)
21Author    Anne Utzolino, Karsten BluhmRequires cookie*
 Title    Neue Einsichten zur Stabilisierung des Hulsit-Strukturtyps am Beispiel von Mnl,2MnIII( B 0 ,) 0 2 und Mn,lSrMnlll( B 0 ,) 0 , New Insights into the Stabilization of the Hulsite Structure During Crystal Structure Determination of M nII2M nIII(B 0 3)0-) and MnllSrM nIII(B 0 3) 0 2  
 Abstract    The compounds MnII2M nIII(B 0 3)02 (I) and MnnSrM nm(B0 3)0 2 (II) were prepared by using a B20 3 flux technique. Single crystals were investigated by X-ray diffraction. I showed ortho-rhombic symmetry, space group D2h -Pbam (No. 55), a = 926.0; b = 1241.5; c = 304.96pm ; Z = 4 and II monoclinic symmetry, space group C2h -P2/m (No. 10), a = 1107.5; b = 311.04; c = 542.93 pm, ß = 95,10(2)°; Z = 2. M n '^ M n '^ B O d O i is isotypic with the mineral Lud­ wigite while MnnSrM nm(B0 3)0 2 is isostructural with the mineral Hulsite. In the structure of M niI2M nlll(B 0 :,) 0 2 (I) all metal point positions showed octahedral oxygen coordination, one point position is occupied by M nu . The structure of M nll2Sr2M nlll2(B O 02O 4 (II) contains five octahedrally coordinated metal sites, three of them statistically occupied by Mn:+ or Mn '+ and Sr2+. The incorperation of S r + seems to be responsible for the Hulsite structure. Both structures contain isolated, trigonal planar B 0 3 units and oxygen atoms that are not coordinated to boron. 
  Reference    Z. Naturforsch. 51b, 1433—1438 (1996); eingegangen am 12. April 1996 
  Published    1996 
  Keywords    Manganese, Strontium Borate Oxide, Ludwigite, Hulsite 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-1433.pdf 
 Identifier    ZNB-1996-51b-1433 
 Volume    51 
22Author    R. Rettich, Hk Müller-BuschbaumRequires cookie*
 Title    Isolierte MnCl6-Oktaeder im Oxohalogeno-Vanadat Ba5(Mg0,4Mn0,6)(V2O7)2MnCl6 Isolated MnCl6 Octahedra in the Oxohalogeno Vanadate Ba5(M g0 4Mn0 6)(V20 7)2MnCl6  
 Abstract    Single crystals o f Ba5(M g0 4Mn0 6)(V20 7)2MnCl6 have been prepared by solid state reactions of M g C 0 3, Mn20 3, V20<i and BaCl2 -2H20 below the melting point of BaCl2. The new vanadium oxide chloride crystallizesowith monoclinic symmetry, space group C2h-P2/c, a = 13.345(4), b = 5.711(2), c = 15.859(4) Ä, ß = 113.69(2)°, Z = 2. Special features of the crystal structure are isolated MnCl6 octahedra and layers created by divanadat groups and (M g,M n)06 octahedra. The ^ [(Mg,Mn)V20 7] nets of Ba5(Mg0 4Mn0 6)(V20 7)2MnCl6 are discussed with respect to other oxohalogeno vanadates containing divanadate groups. 
  Reference    Z. Naturforsch. 52b, 457—461 (1997); eingegangen am 15. Januar 1997 
  Published    1997 
  Keywords    Barium, Magnesium, Manganese, Chlorine, Vanadium Oxide 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0457.pdf 
 Identifier    ZNB-1997-52b-0457 
 Volume    52 
23Author    R. Rettich, Hk Müller-BuschbaumRequires cookie*
 Title    Ein [Ba(Ca,Mn)06]-Gerüst mit eingelagerten V-O-V-Gruppen in der Kristallstruktur von Ba(Ca0,6Mn0,4)V20 7 A [Ba(Ca,Mn)06] Framework with Incorporated V-O-V Groups in the Crystal Structure of Ba(CaQ 6Mn0 4)V20  
 Abstract    Single crystals of Ba(Ca<).6Mn0 4)V20 7 have been prepared by crystallization from melts. X-ray investigations revealed a new quaternary vanadium oxide of the type BaMV20 7. The M positions are occupied statistically by Ca2+ and Mn2+. The compound crystallizes wi|h orthorhombic symmetry, space group D^-Pnma, a = 15.429(2), b -5.7005(12), c = 7.364(2) A, Z = 4. The crystal structure can be interpreted as a [Ba(Ca,Mn)06] network with incorporated V-O-V groups. Considering the nearest O2-neighbours of the incorporated vanadium, the V-O-V groups are complemented to give V20 7 divanadate units. Ba(Ca« 6Mn0 4)V20 7 is isotypic to BaMV20 7 (M=Ca,Cd) but not to BaMnV20 7. 
  Reference    Z. Naturforsch. 52b, 785—789 (1997); eingegangen am 14. April 1997 
  Published    1997 
  Keywords    Barium, Calcium, Manganese, Vanadium Oxide, Crystal Structure 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0785.pdf 
 Identifier    ZNB-1997-52b-0785 
 Volume    52 
24Author    R. Rettich, Hk Müller-BuschbaumRequires cookie*
 Title    Zur Kristallchemie der Silber-Mangan-Oxovanadate Ag2BaMnV20 8 und (AgCa2)Mn2(V 04)3 On the Crystal Chemistry of the Silver Manganese Oxovanadates Ag?BaMnV?Oo and (AgCa2)Mn2(V 0 4)3  
  Reference    Z. Naturforsch. 53b, 291—295 (1998); eingegangen am 12. Januar 1998 
  Published    1998 
  Keywords    Barium, Calcium, Manganese, Vanadium Oxide, Crystal Structure 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0291.pdf 
 Identifier    ZNB-1998-53b-0291 
 Volume    53 
25Author    R. Rettich, Hk Müller-BuschbaumRequires cookie*
 Title    Darstellung und Strukturbeschreibung von NaCa3 Mn(V2O7)(V3 O10) Preparation and Structure o f NaCa3M n(V2O 7)(V3O 10)  
 Abstract    Single crystals of NaCa3Mn(V2O7)(V3O 10) have been prepared by crystallization from flux in argon atmosphere. X-Ray single crystal methods led to triclinic symmetry, space group C '-P l, 
  Reference    Z. Naturforsch. 53b, 507—511 (1998); eingegangen am 22. Januar 1998 
  Published    1998 
  Keywords    Sodium, Calcium, Manganese, Vanadium Oxide, Crystal Structure 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0507.pdf 
 Identifier    ZNB-1998-53b-0507 
 Volume    53 
26Author    M. Staack, Hk Müller-BuschbaumRequires cookie*
 Title    Ba4M n2Ag20(As04)4? ein Barium-Mangan-Oxid-Arsenat mit nichtlinearen O-Ag-O-Hanteln. Ba4Mn2Ag2 0 (As0 4 )4, a Barium Manganese Oxide-Arsenate Showing Nonlinear O-Ag-O Dumbbells  
 Abstract    Single crystals of Ba4Mn2 Ag20 (A s04)4 have been prepared by solid state reactions using me­ tallic silver as reactant. X-ray techniques led to monoclinic symmetry, space group D2h-P2,/m, 
  Reference    Z. Naturforsch. 53b, 512—516 (1998); eingegangen am 29. Januar 1998 
  Published    1998 
  Keywords    Barium, Manganese, Silver, Oxide-Arsenate, Crystal Structure 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0512.pdf 
 Identifier    ZNB-1998-53b-0512 
 Volume    53 
27Author    Jutta Knaudta, Stefan Försterb, Ulrich Bartsch3, Anton Riekerb, Ernst-G JägeraRequires cookie*
 Title    Catalytic Oxidation of a Trialkyl-Substituted Phenol and Aniline with Biomimetic Schiff Base Complexes  
 Abstract    The catalytic oxidation of 2,4.6-tri-f6rr-butylphenol and 2,4,6-tri-te/-r-butylaniline with mo­ lecular oxygen and rerf-butylhydroperoxide was investigated using biomimetic Mn-, Fe-and Co-complexes as catalysts. The catalytic activity and product distribution were determined and compared with those observed in the reactions of the well-known Co(salen) complex. 
  Reference    (Z. Naturforsch. 55b, 86—93 [2000]; received Septem ber 22 1999) 
  Published    2000 
  Keywords    Biomimetic Catalysts, Oxidation, Macrocycles, Manganese, Iron, Cobalt 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0086.pdf 
 Identifier    ZNB-2000-55b-0086 
 Volume    55 
28Author    JohannesA. Schmitt, Hans-Ulrich Meisch, W. Olfgang ReinleRequires cookie*
 Title    Schwermetalle in höheren Pilzen, II * Mangan und Eisen Heavy Metals in Higher Fungi, II Manganese and Iron  
 Abstract    In several series of 262 samples, Higher Fungi, especially from the Tremellales and Gastero-mycetes, were analyzed by atomic absorption spectroscopy on their content of the trace metals manganese and iron. Both elements were found to be present in higher concentrations in some species of the Trem ellales and P hallales. In the case of wood-destroying fungi, the Fe-and Mn-contents of the substrates were compared to those of the corresponding fungi. Only the species with the highest level of these metals reached the same contents as their substrates or a poor enrichment. Among the remaining species of the Higher Fungi, only in the case of the epigean P hallales, a possible biochemical role of manganese has been discussed. 
  Reference    (Z. Naturforsch. 32c, 712 [1977]; eingegangen am 20. Juni 1977) 
  Published    1977 
  Keywords    Manganese, Iron, Higher Fungi, Tremellales, Gasterales 
  Similar Items    Find
 TEI-XML for    default:Reihe_C/32/ZNC-1977-32c-0712.pdf 
 Identifier    ZNC-1977-32c-0712 
 Volume    32 
29Author    Jan-K Arel Buijink, M. Athias, Noltemeyer Und, FrankT. EdelmannRequires cookie*
 Title    Metall-N,N  
 Abstract    -bis(trimethylsilyl)benzamidinate: Synthese und Kristallstruktur von Bis[N,N-bis(trimethylsilyl)benzamidinato)chroni(II), [P hC (N SiM e3)2l2Cr Metal-N,N'-bis(trimethylsilyl)benzamidinates: Synthesis and Crystal Structure of Bis[N,N'-bis(trimethylsilyl)benzamidinato]chromium(II), [PhC(NSiM e3)2]2Cr The preparation o f N,N'-bis(trimethylsilyl)benzamidinates o f chromium, manganese, zinc and bismuth is described. The chromium(II) derivative [PhC(NSiM e3)2]2Cr (2) has been char­ acterized by an X-ray structure determination. Treatment o f CpTiCl3 with one equivalent o f N a[PhC (N SiM e3),] • 0.5 Et^O yields the mixed Cp/benzamidinate complex [PhC(NSiM e3)2]CpTiCl2 (9). 
  Reference    Z. Naturforsch. 46b, 1328—1332 (1991); eingegangen am 26. April 1991 
  Published    1991 
  Keywords    N, N'-Bis(trim ethylsilyl)benzam idinates, Chromium, Manganese, Zinc, Bismuth 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/46/ZNB-1991-46b-1328.pdf 
 Identifier    ZNB-1991-46b-1328 
 Volume    46 
30Author    AnjaL. Oose, W. Illiam, S. SheldrickRequires cookie*
 Title    Quaternary Selenidogermanates(IV) A3[AgGe4Se10]*2H2O and A2[MnGe4Se10]*3H2O (A = Rb, Cs) with Open Framework Structures  
 Abstract    Hydrothermal reaction of Ge and Se with Ag(CH3COO) in the presence of alkali metal carbonates affords the open framework selenidogermanates(IV) A^fAgGejSeiol ^H^O (A = Rb, Cs), 1 and 2, which contain corner linked adamantane-like Ge4Seio cages and AgSe4 tetrahedra. The analogous reaction with Mn(CHiCOO)2 yields the isostructural tetragonal compounds A2[MnGe4Seio]-3 H2 0 (A = Rb, Cs), 3 and 4. The cations are sited at a general position in the channels of the silver bridged anionic framework of 1 and 2 and exhibit a disordered pattern of occupation (s.o.f. = 0.75) with one of the two crystallographically independent water oxygen atoms 0 (2) (s.o.f. = 0.25). In contrast, the Rb+ cations in 3 are disordered over all three cation/oxygen sites, and the cation/water occupation pattern is fully reversed for the larger Cs+ cations in 4 in comparison to 1 and 2. 
  Reference    Z. Naturforsch. 52b, 687—692 (1997); received March 13 1997 
  Published    1997 
  Keywords    Selenidogermanates(IV), Silver, Manganese, Hydrothermal Synthesis, Framework Structure 
  Similar Items    Find
 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0687.pdf 
 Identifier    ZNB-1997-52b-0687 
 Volume    52 
31Author    R. E. Wilkinson, R. R. DuncanRequires cookie*
 Title    Oxabetrinil Reversal of Metolachlor and Acid Soil Stress  
 Abstract    M etolachlor and excess M n:+ (acid soil stress) induce alterations in gibberellin precursor biosynthesis that can explain the morphological responses to these physiological stresses. O xa­ betrinil protects sorghum [Sorghum bicolor (L.) Moench] from the influence o f metolachlor and excess M n2+. Sorghum cultivar variations in response to excess M n2+ are explicable as dif­ ferential rates o f tvjf-kaurene biosynthesis between acid soil sensitive and tolerant cultivars. Concentrations o f M n2+ present in vegetative leaves and reproductive stem tissues were not different. Therefore, cultivar differences in e«/-kaurene biosynthesis explain the acid soil toler­ ance differences rather than differential M n2+ absorption, translocation, and/or compartmen-tation. M etolachlor and safener responses are found in cellular compartments and tissues that do not match a decreased herbicide concentration through absorption, transport, or degrada­ tion as a sole mode o f action for safeners. 
  Reference    Z. Naturforsch. 46c, 950 (1991); received March 26 1991 
  Published    1991 
  Keywords    Oxabetrinil, M etolachlor, Acid Soil Stress, Manganese, Isoprenoid Synthesis 
  Similar Items    Find
 TEI-XML for    default:Reihe_C/46/ZNC-1991-46c-0950.pdf 
 Identifier    ZNC-1991-46c-0950 
 Volume    46 
32Author    Koshi SaitoRequires cookie*
 Title    Acceleration of Enzyme-Dependent Carthamin Formation by Manganese with Diversed Valence States  
 Abstract    Effect of manganese with three different valence states on carthamin formation was studied by using freshly collected flowers from dyer's saffron (C. tinctorius) capitula. A t 1 -10 hm con­ centration, these cations accelerated markedly the carthamin formation induced by endoge­ nous enzyme(s) in the detached floral tissues. The acceleration was obviously dependent on the valence state o f the test metals, more pronounced by M n (V II) or M n (III) than by M n (II) at a series o f given ionic strengths. O n a 1 |aM level, M n (V II) and M n (III) accelerated the pigment accumulation by faster o f 9 and 8, resp. than M n (II) during 5 min incubation at 30 °C. M n (V II) and M n (III) acted on both fresh and boiled florets, while M n (II) exerted preferential­ ly its activity on intact materials. Possible im plication of manganese ions on the enzyme-cata-lyzed carthamin formation are discussed. 
  Reference    Z. Naturforsch. 46c, 1011—1016 (1991); received M ay 28/July 25 1991 
  Published    1991 
  Keywords    Carthamus tinctorius, Cartham in Form ation, Manganese, Diversed Valence State 
  Similar Items    Find
 TEI-XML for    default:Reihe_C/46/ZNC-1991-46c-1011.pdf 
 Identifier    ZNC-1991-46c-1011 
 Volume    46