The Crystal Structure of LiNb3O8.

Lundberg, Monica; Kjekshus, Arne; Lindberg, Bengt; Svensson, Sigfrid; Koskikallio, Jouko; Kachi, Sukeji

doi:10.3891/acta.chem.scand.25-3337

Cited by 53 publications

(20 citation statements)

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“…(4) Jacobson, Collins & Fender (1974). (5) Lundberg (1971). (6) Waltersson, Werner & Wilhelmi (1977a).…”

Section: Resultsmentioning

confidence: 99%

A method, based upon `bond-strength' calculations, for finding probable lithium sites in crystal structures

Waltersson¹

1978

Acta Cryst Sect A

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A method for finding probable Li positions in a given oxygen matrix in crystals is described. It is formally based upon bond strength-bond length discussions. The sums of bond strengths for simulated Li atoms are calculated and printed in three-dimensional maps. The method is tested on nine structures containing Li atoms. In five of these the Li sites are known from neutron diffraction studies, in two from X-ray powder diffraction data sets, and in the other two from X-ray single-crystal investigations. The calculated Li coordinates in all the tests are in fair agreement with the experimentally observed positions. The method is therefore likely to provide an auxiliary tool for determining Li sites in X-ray crystal structure studies.

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“…(4) Jacobson, Collins & Fender (1974). (5) Lundberg (1971). (6) Waltersson, Werner & Wilhelmi (1977a).…”

Section: Resultsmentioning

confidence: 99%

A method, based upon `bond-strength' calculations, for finding probable lithium sites in crystal structures

Waltersson¹

1978

Acta Cryst Sect A

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“…However, this diagram does not show the compound LiNb 0" which is known to occur in this system [8,9,10],…”

Section: Discussion Of Resultsmentioning

confidence: 99%

“…TTBs -A nonstoichiometric solid solution having an orthorhombic distortion of a tetragonal tungsten bronze-type lattice with superstructure indicating a tripled cell. 4:9 -A compound having the apparent composition 4K20:9Nb205 (KsNbi 301,9 …”

Section: Thetamentioning

confidence: 99%

Alkali oxide-tantalum oxide and alkali oxide-niobium oxide ionic conductors

Roth¹,

Parker²,

Brower³

et al. 1974

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“…Modulatory effects of neuropeptides on the actions of 'classical' neurotransmitters, in the absence of direct effects of the peptides on their own, have been demonstrated for other types of cells. Thus, substance P and somatostatin inhibit nicotinic reponses in adrenal medullary cells (Mizobe et al, 1979;Role et al, 1981), and VIP potentiates responses at muscarinic cholinergic receptors in the salivary gland (Lundberg, 1981). These observations raise the question of how the binding of neuropeptides modulates the response to a primary ligand.…”

Section: Introductionmentioning

confidence: 99%

Somatostatin alters beta-adrenergic receptor-effector coupling in cultured rat astrocytes.

Niehoff¹,

Mudge²

1985

The EMBO Journal

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The neuropeptide somatostatin potentiates beta‐adrenergic receptor‐mediated cAMP formation in astrocytes derived from neonatal rat cortex but does not affect cAMP levels by itself. beta‐Adrenergic receptors in these cells can be specifically labeled with the high affinity antagonist [125I] cyanopindolol ([125I]CYP). In addition, astrocytes display both high and low affinity binding sites for the agonist isoproterenol, which are thought to represent receptors which are coupled or uncoupled, respectively, to the guanine nucleotide regulatory protein. We find that somatostatin does not modify beta‐receptor density, nor receptor affinity for either the antagonist ([125I]CYP) or for the agonist isoproterenol. In the presence of the guanine nucleotide analogue, Gpp(NH)p, only low affinity (uncoupled) displacement of [125I]CYP binding by isoproterenol is observed. However, somatostatin (1 microM), when added to the cells together with Gpp(NH)p, prevents the nucleotide‐induced loss of the high affinity (coupled) component of agonist displacement. This result suggests that somatostatin increases noradrenaline‐induced cAMP production by enhancing coupling between the beta‐receptor and the stimulatory guanine nucleotide regulatory protein.

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The Crystal Structure of LiNb3O8.

Cited by 53 publications

References 0 publications

A method, based upon `bond-strength' calculations, for finding probable lithium sites in crystal structures

A method, based upon `bond-strength' calculations, for finding probable lithium sites in crystal structures

Alkali oxide-tantalum oxide and alkali oxide-niobium oxide ionic conductors

Somatostatin alters beta-adrenergic receptor-effector coupling in cultured rat astrocytes.

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