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1Author    Sabine Rings3, Vladislav Ischenkob, Martin Jansenb, Sonderdruckanforderungen An, ProfM. JansenRequires cookie*
 Title    Darstellung und Strukturanalyse von Lithium- [tetrakis-(methylamino-)aluminat] Preparation and Crystal Structure of Lithium[tetrakis-(methylamino-)aluminate]  
 Abstract    The preparation and spectroscopic data of the new ternary amide LiAl(NHCH3)4 are reported. The structure of the title compound has been determined from X-ray powder diffraction data (tetragonal, 14,, a = 14.000(4) A, c = 9.275(2) A, 210 reflections, R = 3.75%, weighted R = 5.10%). Both the lithium and the aluminium atoms are coordinated tetrahedrally by nitrogen atoms. Edge-sharing pairs of lithium centered and aluminium centered tetrahedra are connected to each other in helical chains forming a 3D-framework via the remaining vertices. A comparison of the projection of the crystal structure of LiAl(NHCH3)4 along the c-axis to those of cristobalite and of hollandite, (Ba,K)2 (M n,Fe)80 16, reveals similarities with respect to both the connectivity and the topology of ring structures. 
  Reference    Z. Naturforsch. 55b, 730—734 (2000); eingegangen am 20. April 2000 
  Published    2000 
  Keywords    Amides, Lithium, Aluminium 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0730.pdf 
 Identifier    ZNB-2000-55b-0730 
 Volume    55 
2Author    Ursula Eberz, Werner Seelentag, Hans-Uwe SchusterRequires cookie*
 Title    Zur Kenntnis farbiger ternärer und quaternärer Zintl-Phasen Coloured Ternary and Quaternary Zintl-Phases  
 Abstract    Ternary and quaternary, mostly coloured compounds of Au, Pd and Pt, resp., with Li, Mg, Sc and Sn were prepared and structurally investigated. They crystallize in a "filled" Zinkblende type structure (space group F?3m) and can be characterized as ternary or quaternary Zintl-phases. Colours seem to depend on unfilled d-orbitals of Au, Pd or Pt. 
  Reference    Z. Naturforsch. 35b, 1341—1343 (1980); eingegangen am 5. August 1980 
  Published    1980 
  Keywords    Lithium, Magnesium, Scandium, Gold, Palladium 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1341.pdf 
 Identifier    ZNB-1980-35b-1341 
 Volume    35 
3Author    Ch LangRequires cookie*
 Abstract    Single crystals of LiBa2Cu30 6 have been pre­ pared by recrystallization from melts in a stream of dry Argon as well as by spontaneous CO 2-LASER heating. It crystallizes with orthorhom bic symmetry, space group -Fmmm, a = 8,219(2), b = 11,520 (2), c = 14,284(3) A, Z = 8. The crystal structure is isotypic to NaBa2Cu30 6. 
  Reference    Z. Naturforsch. 50b, 681—683 (1995); eingegangen am 19. September 1994 
  Published    1995 
  Keywords    Lithium, Barium, Copper, Oxide 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0681_n.pdf 
 Identifier    ZNB-1995-50b-0681_n 
 Volume    50 
4Author    Uwe Klingebiel, Brigitte Tecklenburg, Mathias Noltemeyer, Dieter Schmidt-Bäse, Regine Herbst-IrmerRequires cookie*
 Title    Cyclodisilazane in cis-Konformation -eine einfache Synthese Cyclodisilazanes in cis Conformation -a Facile Synthesis  
 Abstract    Dilithium derivatives of bis(silylamino)fluorosilanes (1-3) react with chlorotrimethylsilane to give dilithium derivatives of the corresponding bis(silylamino)chlorosilanes and Me3SiF. LiCl-elimination in the presence of THF leads to the formation of silaamidides, which are 
  Reference    Z. Naturforsch. 53b, 355—360 (1998); eingegangen am 14. Januar 1998 
  Published    1998 
  Keywords    Silicon, Lithium, Silylamide, Silaamidide, Cyclodisilazane 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0355.pdf 
 Identifier    ZNB-1998-53b-0355 
 Volume    53 
5Author    G. H., W.Requires cookie*
 Title    Isotopieeffekte in der Grenzschicht anorganischer Lösungen Isotope Effects at the Surface o f Inorganic Solutions  
 Abstract    Isotope effects were investigated at the surface of aqueous lithium and calcium salt solutions. The dependence on the temperature in the gas phase was determined. The surfaces of the solutions were isolated by spray experiments. In the case of calcium salt solutions an enrichment of the lighter isotope 40Ca in relation to the heavier isotopes 44Ca and 48Ca was found at the solution surface. The experiments with lithium fluoride and lithium iodide gave inverse isotope effects. The calcium isotope effect could be qualitatively explained by the Gibbs theorem. The isotope separation of lithium possibly can be referred to the more covalent bonding character than the ionic one of lithium compounds at the solution surface. 
  Reference    (Z. Naturforsch. 30b, 497—502 [1975]; eingegangen am 27. November 1974/28. Februar 1975) 
  Published    1975 
  Keywords    Surface Isotope Effects, Lithium, Calcium, Thermal Ionization Mass Spectrometry 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0497.pdf 
 Identifier    ZNB-1975-30b-0497 
 Volume    30 
6Author    Wolfgang Döring, Werner Seelentag, Werner Buchholz, Hans-Uwe SchusterRequires cookie*
 Title    Ternäre Alkalimetallverbindungen vom Mg32(Zn,Al)49-Typ mit Elementen der 4. Hauptgruppe Ternary Compounds of the Mg32(Zn, Al)49-Type Structure with Alkali Metals and IV B-Elements  
 Abstract    In the ternary systems Li-Cu-Si, Li-Ni-Si and Na-Au-Si (Ge, Sn) five phases could be prepared and characterized by single crystal investigations, which crystallize in a cubic body-centered lattice and are related to the Mg32(Zn, Al)49-type structure (T-phases). 
  Reference    Z. Naturforsch. 34b, 1715—1718 (1979); eingegangen am 26. Juli 1979 
  Published    1979 
  Keywords    Ternary Phases, Lithium, Sodium, Copper, Gold 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-1715.pdf 
 Identifier    ZNB-1979-34b-1715 
 Volume    34 
7Author    Hans-Uwe Schuster, Axel Czybulka, Detlef LastRequires cookie*
 Title    Preparation and Structure of LiPd2Tl  
 Abstract    A new ternary phase LiPd2Tl has been synthe­ sized. It crystallizes in a modified tetragonal A l3Ti-type-structure with the lattice constants a = 
  Reference    Z. Naturforsch. 45b, 1451—1452 (1990); eingegangen am 26. Januar 1990 
  Published    1990 
  Keywords    Ternary Compound, Lithium, Palladium, Thallium, Crystal Data 
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 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-1451_n.pdf 
 Identifier    ZNB-1990-45b-1451_n 
 Volume    45 
8Author    N.M U Rq, U. Iza3, S.G M AncaaRequires cookie*
 Title    On the Incorporation o f Li(I) into the Fluoroapatite Lattice  
 Abstract    a Instituto de Q ufm ica A nalftica, Facultad de Bioqufm ica, Q ufm ica y Farmacia, U niversidad N acional de Tucum än, 4000-Tucum an, A rgen tina b C entro de Q ufm ica Inorgänica (C E Q U I N O R), Facultad de C iencias Exactas, U n iversidad N acional de La Plata, C. C orreo 962, In attem pts to incorporate the L i(I) cation into the C a(II) position s o f the fluoroapatite lattice it has been sh ow n that the unit cell b eco m es increasingly distorted with the increase o f lithium concentration. C rystallographic data have been obtained from X-ray pow d er data. The infrared spectra o f th ese su bstitu ted apatites sh ow that the Li(I) incorporation has a n egligible effect on the strength o f the P-O bonds. 
  Reference    Z. Naturforsch. 52b, 1281 (1997); received July 2 1997 
  Published    1997 
  Keywords    Lithium, F luoroapatite, Crystal D ata, IR Spectra 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-1281_n.pdf 
 Identifier    ZNB-1997-52b-1281_n 
 Volume    52 
9Author    Brogå, A. JohnssonRequires cookie*
 Abstract    Recent findings indicate that lithium belongs to the group of rather exclusive agents which affect the period of circadian clocks: The period of the cir­ cadian petal movements of Kalanchoe is increased by about 2 hours in 5 m M LiCl 2. In the present paper we will report an action of lithium on a much more rapid oscillation, which under certain circum­ stances occurs in stomatal regulation. These oscil­ lations are found to be remarkably slowed down by lithium, in analogy to the circadian oscillations of Kalanchoe. Material and Methods 
  Reference    (Z. Naturforsch. 29c, 298 [1974]; received February 11 1974) 
  Published    1974 
  Keywords    Lithium, Stomata, Plant Rhythm, Cell Permeability 
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 TEI-XML for    default:Reihe_C/29/ZNC-1974-29c-0298_n.pdf 
 Identifier    ZNC-1974-29c-0298_n 
 Volume    29 
10Author    Werner Buchholz, Hans-Uwe SchusterRequires cookie*
 Title    Die Verbindungen MgFe6Ge6 und LiCo6Ge6 The Compounds MgFeßGee and LiCoöGee  
 Abstract    The hexagonally crystallizing compounds MgFeeGeß and LiCoeGeß were prepared and structurally characterized by single crystal investigations. The lattice constants are a = 506.7 pm, c — 804.5 pm, c/a—1.58s for MgFe6Ge6 and a = 504.8 pm, c = 772.9 pm, c/a = 1.53i for LiCoßGee. The structures (space group P6/mmm) are closely related to the structure of LiFeeGe6 and the B35-type structure of FeGe. 
  Reference    Z. Naturforsch. 33b, 877—880 (1978); eingegangen am 26. Mai 1978 
  Published    1978 
  Keywords    Ternary Germanium Compounds, Magnesium, Iron, Lithium, Cobalt, Crystal Structure 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0877.pdf 
 Identifier    ZNB-1978-33b-0877 
 Volume    33 
11Author    Yoshitaka Matsushitab, MercouriG. KanatzidisRequires cookie*
 Title    Synthesis and Structure of I ^ G e S  
 Abstract    The compound Li4 GeS4 has been prepared as transparent, light yellow moisture-sensitive crystals. Li.(GeS4 belongs to the space group Pnma with a = 14.107(6) A, b = 7.770(3) A and c = 6.162(2) A. The crystal structure was solved by direct-methods. The final R and /?H-values are 1.85 and 1.65% for 866 observed reflections. The Li4 GeS4 structure has three crystallographically independent lithium sites and one germanium site. The lithium atoms adopt two different coordination types. The Lil atom is coordinated to five sulfur atoms in a square pyramidal geometry, while the Li2 and Li3 atoms have distorted tetrahedral coordination. The Ge atom is tetrahedrally coordinated by four sulfur atoms and is found as [GeS4 ]4-units. The anisotropic three-dimensional crystal structure of Li4 GeS4 is described. 
  Reference    (Z. Naturforsch. 53b, 23—30 [1998]; received October 10 1997) 
  Published    1998 
  Keywords    Lithium, Germanium, X-Ray Data, Crystal Structure, Raman Spectra 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0023.pdf 
 Identifier    ZNB-1998-53b-0023 
 Volume    53 
12Author    B. Erthold Kersting, G. Unther SteinfeldRequires cookie*
 Title    On the M etalation o f 2,6-Dimethyl-4-ter/-butyl-thiophenol  
  Reference    Z. Naturforsch. 53b, 1239—1240 (1998); received August 5 1998 
  Published    1998 
  Keywords    M etalation, 2, 6-Dim ethyl-4-rm -butyl-thiophenol, Lithium, Sulfur 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-1239_n.pdf 
 Identifier    ZNB-1998-53b-1239_n 
 Volume    53 
13Author    H. Stieve, M. Pflaum, J. Klomfaß, H. G. AubeRequires cookie*
 Title    Calcium/Sodium Binding Competition in the Gating of Light-Activated Membrane Conductance Studied by Voltage Clamp Technique in Limulus Ventral Nerve Photoreceptor  
 Abstract    The mem brane current vs. voltage dependence was measured in Limulus ventral nerve photo­ receptors at various external C a2+ and N a+ concentrations, using the voltage clam p technique. Lowering the external concentration of the divalent cations Ca~+ and Mg+ to < 1 |im ol/l by adding EDTA causes 1) the light-induced transient conductance increase to disappear and 2) Irev J d ! the reversal potential of the mem brane current in the dark to shift to a positive value between + 10 and + 2 0 mV. This value is about the same as the (V^J-l), reversal potential of the total light current under normal ionic conditions. If the external N a+ is lowered to 50 mmol/1 (i.e. 10% of the normal concentration) simultaneously with the lowering o f the divalent cation concentration described above, the light response is not abolished and V TevJ p is shifted less. The extent of this antagonism depends on the sodium sub­ stitute; it is stronger if choline is used instead of lithium. Lowering of sodium alone to 50 mmol/1, in a saline containing normal C a2+ and Mg2+ concen­ trations, does not change the mem brane dark current vs. voltage curve and so is not altered; VT ^ A J L, the reversal potential of the light-induced current, however, is reduced by 10 mV (from + 2 0 to + 1 0 mV). This reduction in %evA JL can be accounted for by the reduction of the sodium gradient across the cell membrane. Raising the external C a2+ concentration to 40 or 100 mmol/1 has no conspicuous effect on the mem brane current vs. voltage dependence and the gating o f the light-induced conductance in­ crease. The results are consistent with our working hypothesis that the gating o f the light-activated ion channels in Limulus photoreceptor is controlled by negative binding sites for which calcium-and sodium ions compete with antagonistic actions. Abbreviations: ReP, receptor potential (m embrane voltage response to the light stimulus); HMAX [mV], peak am pli­ tude of the ReP; PMP [mV], pre-stimulus mem brane po­ tential (difference between the extracellularly recorded zero line and the intracellularly recorded base line; initial and final zero were averaged to compensate for drift); VM [mV], mem brane voltage; J M [nA], mem brane current; J d [nA]» dark current, m em brane current during voltage clamp, measured 1 s after clam p onset; J L [nA], am plitude o f total light current; am plitude of total m em brane current following the light flash (J D + A JL)\ AJL, am plitude of light-induced current; ^ ev7D [mV], reversal potential of dark current; ^ ev7 L[mV], reversal potential of light cur­ rent; I(evj y L[mV], reversal potential of the light-induced current evoked by the light stimulus; g G [|iS], membrane (slope) conductance in the dark; ^lD 1^], total membrane (slope) conductance during illum ination; J g L[|iS], light induced mem brane (slope) conductance; PS, physiological saline (see Table I); [N a+]ex[Ca2+]ex, sodium, or calcium ion concentration of the external saline; EDTA, ethylene dimethyl tetra acetic acid; EGTA, ethylene glycol-bis (2-aminoethylether) N ,N '-tetra acetic acid. 
  Reference    Z. Naturforsch. 40c, 278—291 (1985); received N ovember 19 1984 
  Published    1985 
  Keywords    Limulus Ventral Nerve Photoreceptor, Current-Voltage Relation, Varied External Calcium and Sodium Concentration, Calcium /Sodium Binding Competition, Lithium 
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 TEI-XML for    default:Reihe_C/40/ZNC-1985-40c-0278.pdf 
 Identifier    ZNC-1985-40c-0278 
 Volume    40 
14Author    Hennig Stieve, Gabriele Rüsing, Weijia Yuan, H.Thomas HennigRequires cookie*
 Title    The Effects of Externally Applied Lithium and Strontium on the Arsenazo-Monitored Cytosolic Calcium Signal of the Limulus Ventral Photoreceptor  
 Abstract    The intracellular arsenazo signal indicating the transient light-evoked change in cytosolic Ca2+ (or Sr2+) concentration was measured in Lim ulus ventral photoreceptor simultaneously with the receptor potential at 15 °C. The decline of the arsenazo signal has two phases (D 1 and D 2) when the photoreceptor is bathed in physiological saline. 1. When calcium is replaced by strontium in the superfusate both receptor potential and arsenazo signal are markedly increased in amplitude and the membrane potential is hyper­ polarized. The decline of the arsenazo signal is prolonged and becom es monophasic; the fast phase D 1 of the decline disappears. 2. In strontium saline under voltage clamp conditions the slope o f the monophasic decline of the arsenazo signal is the steeper the more negative the membrane voltage. 3. After replacing sodium by lithium in the superfusate the rise of the receptor potential and of the arsenazo signal are not much altered. The decline of the arsenazo signal, however, is slowed down more than 3-fold; this is due to the complete suppression of the fast phase D1 and the retardation o f the slow phase D 2 of the calcium re-decline. Interpretation: 1. The N a -C a exchanger can accept strontium as a calcium substitute. Strontium has a weaker desensitizing action than calcium. Strontium is not -or only very little -taken up by the endoplasmic cisternae. 2. In sodium-free lithium saline the N a -C a exchanger, the N a -K ATPase and the calcium uptake system of the endoplasmic cisternae do not function. Therefore the intracellular calcium level rises. Abbreviations: Arsenazo III, 2,2'-(l,8-dihydroxy-3,6-di-sulfo-2-naphthalene-bis(azo)dibenzenearsonic acid; AS, arsenazo signal; cGMP, guanosine 3':5'-cyclic m ono­ phosphate; D l , D 2 , fast and slow phase o f decline of the arsenazo signal; EGTA, ethylene glycol-bis(ß-aminoethylether)-N,N,N',N'-tetraacetic acid; calcium chelating agent; F, area, time integral of light-evoked sig­ nal; Hmax, peak height of a light-evoked signal; IP3, ino­ sitol 1,4,5-trisphosphate; Mi, initial slope, mean slope of rise from end of latency until half height o f the signal; Mm, median slope of rise, slope of rise at half height of the signal; PMP, prestimulus membrane potential; PS, physiological saline; ReP, receptor potential, light-evoked membrane voltage signal; SRC, subrhabdomeric cisternae; Tlat, latency, time from stimulus onset to first significant start of the response; Tmax, time-to-peak from stimulus onset; Tr, rise time (Tmax -Tlat); T2, decay time, time during which the response decays from its maximum to 50% of that value. 
  Reference    Z. Naturforsch. 49c, 372 (1994); received March 14 1994 
  Published    1994 
  Keywords    Limulus Photoreceptor, R eceptor Potential, Intracellular Arsenazo Signal, Cytosolic Calcium or Strontium Transient, Lithium 
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 TEI-XML for    default:Reihe_C/49/ZNC-1994-49c-0372.pdf 
 Identifier    ZNC-1994-49c-0372 
 Volume    49 
15Author    Anders Johnsson, Wolfgang Engelmann, Burkhard Pflug, W. Aldem, Ar KlemkeRequires cookie*
 Title    Influence of Lithium Ions on Human Circadian Rhythms  
 Abstract    Lithium carbonate lengthens the circadian period in humans under temporal isolation (arctic summer four groups. L i+ ions are known to change the period length of several circadian rhythm s in plants and animals [1], In all cases reported so far the effect is a lengthening o f the free running period. An experiment has been performed on a single person in an isolation unit to test whether L i+ acts on hum an circadian rhythms and the results provided have not been conclusive [2]. We have conducted an experiment to determine the influence o f L i+ on the hum an circadian system under arctic sum m er conditions. The continuous light and abscence o f other 24 h tim e cues allows free run o f hum an circadian rhythms [3]. In this brief report, we present some salient results of the effects of Li+ on the tem perature-, sleep-wakefulness-, and activity rhythm in some humans. More details of this investigation will be published elsewhere. 
  Reference    Z. Naturforsch. 35c, 503—507 (1980); received January 14 1980 
  Published    1980 
  Keywords    Dedicated to Prof C H Hertz, Lund University, Sweden, on His 60th Birthday Circadian Rhythms, Lithium, Body Temperature, Activity, Svalbard-Spitsbergen 
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 TEI-XML for    default:Reihe_C/35/ZNC-1980-35c-0503.pdf 
 Identifier    ZNC-1980-35c-0503 
 Volume    35