1000 resultados para Beta hCG livre


Relevância:

20.00% 20.00%

Publicador:

Resumo:

In this paper we show that the orthorhombic phase of FeSi2 (stable at room temperature) displays a sizable anisotropy in the infrared spectra, with minor effects in the Raman data too. This fact is not trivial at all, since the crystal structure corresponds to a moderate distortion of the fluorite symmetry. Our analysis is carried out on small single crystals grown by flux transport, through polarization-resolved far-infrared reflectivity and Raman measurements. Their interpretation has been obtained by means of the simulated spectra with tight-binding molecular dynamics.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

The beta 2-adrenergic receptor undergoes isomerization between an inactive conformation (R) and an active conformation (R*). The formation of the active conformation of the receptor molecule can be promoted by adrenergic agonists or by mutations in the third cytoplasmic domain that constitutively activate the receptor. Here we show that, of several beta-adrenergic receptor-blocking drugs tested, only two, ICI 118551 and betaxolol, inhibit the basal signaling activity of the beta 2-adrenergic receptor, thus acting as negative antagonists. We document the molecular properties of the more efficacious ICI 118551; (i) it shows higher affinity for the inactive form of the receptor and (ii) it inhibits the spontaneous formation of a beta-adrenergic receptor kinase substrate by the receptor. These properties are opposite those of adrenergic agonists, indicating that, in a fashion reciprocal to that of agonists, negative antagonists promote the formation of an inactive conformation of the receptor.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

The book of Joshua is in the very center of the recent discussion about the existence of a coherent deuteronomistic redaction in Deut to 2 Kings during the exilic period. This article analyses the beginning (Josh 1.1-9) and the end (Josh 23 and 24) of Josh. Josh 1.1-2,5-7 and chapter 23 belong to the dtr edition. Josh 23 was followed by Judg 2.6ff. During the Persian period, Deuteronomists and priests intended to publish one Law for the whole community. There was probably a discussion whether the Torah should be a Penta- or a Hexateuch. This discussion may explain such a text as Josh 24 which clearly tries to construct an Hexateuch (cf. also Gen. 50.25: Exod 13.19; Josh 24.32). But since the Torah is about foundations, the main theological trends agreed to have its end with the death of Moses.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

OBJECTIVE: Our laboratory has previously established in vitro that a caspase-generated RasGAP NH(2)-terminal moiety, called fragment N, potently protects cells, including insulinomas, from apoptotic stress. We aimed to determine whether fragment N can increase the resistance of pancreatic beta-cells in a physiological setting. RESEARCH DESIGN AND METHODS: A mouse line, called rat insulin promoter (RIP)-N, was generated that bears a transgene containing the rat insulin promoter followed by the cDNA-encoding fragment N. The histology, functionality, and resistance to stress of RIP-N islets were then assessed. RESULTS: Pancreatic beta-cells of RIP-N mice express fragment N, activate Akt, and block nuclear factor kappaB activity without affecting islet cell proliferation or the morphology and cellular composition of islets. Intraperitoneal glucose tolerance tests revealed that RIP-N mice control their glycemia similarly as wild-type mice throughout their lifespan. Moreover, islets isolated from RIP-N mice showed normal glucose-induced insulin secretory capacities. They, however, displayed increased resistance to apoptosis induced by a series of stresses including inflammatory cytokines, fatty acids, and hyperglycemia. RIP-N mice were also protected from multiple low-dose streptozotocin-induced diabetes, and this was associated with reduced in vivo beta-cell apoptosis. CONCLUSIONS: Fragment N efficiently increases the overall resistance of beta-cells to noxious stimuli without interfering with the physiological functions of the cells. Fragment N and the pathway it regulates represent, therefore, a potential target for the development of antidiabetes tools.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Comprend : [Fig. p.75 : astronomie. XVIè siècle.] La création du monde. [cote : microfilm m 9658/R 34080] ; [Fig. p.87 : astronomie. XVIè siècle.] Figure de titubation du firmament. [cote : microfilm m 9658/R 34080] ; [Fig. p.143 : astronomie. XVIè siècle.] Figure des quatre saisons du monde. [cote : microfilm m 9658/R 34080] ; [Fig. en reg. p.180 : astronomie. XVIè siècle.] Figure de la création du monde. [cote : microfilm m 9658/R 34080] ; [Fig. p.181 : astronomie. XVIè siècle.] Figure de titubation du Firmament. [cote : microfilm m 9658/R 34080] ; [Fig. en reg. p.181 : astronomie. XVIè siècle.] Figure des saisons et âges du monde. [cote : microfilm m 9658/R 34080]

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Comprend : [Fig. au titre : Pierre de Crescent dictant ou enseignant la matière de son ouvrage.] [cote : microfilm m 11611/R 70185] ; [pl. en reg. folio Aii : scène de dédicace. Pierre de Crescent remettant son livre au Roi Charles V.] [cote : microfilm m 11611/R 70185] ; [Fig. folio Bi : scène de taille des arbres, de construction d'un édifice. Vue d'une cour de ferme. Scène de taille de la vigne. (Cette gravure est une reprise de l'édition de 1486. Elle est également réemployée dans la présente édition de ; [Fig. folio Cii : scène de taille des arbres, coupe et greffons. (Cette gravure est réemployée dans la présente édition de 1516 aux folios XIVI et CXXXV.)] [cote : microfilm m 11611/R 70185] ; [Fig. folio XXii : scène de semailles et de moissons. (Cette gravure est une reprise de l'édition de 1486.)] [cote : microfilm m 11611/R 70185] ; [Fig. folio FXVi verso : manières d'utiliser les plantes et les herbes. Séchage, distillation ou infusion, préparation et conditionnement à des fins médicinales.] [cote : microfilm m 11611/R 70185] ; [Fig. folio XCiii verso : animaux fabuleux ou exotiques : licorne, chameau, éléphant, cerf, lion, panthère, singe, hérisson et autres.] [cote : microfilm m 11611/R 70185] ; [Fig. folio LXViii : scène de chasse. Chasse au faucon avec une arbalète. (Cette gravure est une reprise de l'édition de 1486.)] [cote : microfilm m 11611/R 70185] ; [Fig. folio LXXXiii verso : calendrier des saisons et des mois. Activités agricoles selon les périodes de l'année.] [cote : microfilm m 11611/R 70185]

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Comprend : [Fig. p.1 du Prologue : Pierre de Crescent remettant son livre au Roi Charles V] [cote : microfilm m 9883/R 33444] ; [Fig. folio ai : scènes de taille des arbres, de construction d'un édifice. Vue d'une cour de ferme. Scène de taille de la vigne.] [cote : microfilm m 9883/R 33444] ; [Fig. folio fi : scènes de semailles et de moissons.] [cote : microfilm m 9883/R 33444] ; [Fig. folio 1 du livre X : scène de chasse. Fauconnerie. Chasse du cerf et du sanglier. Chasse des oiseaux à l'arbalète.] [cote : microfilm m 9883/R 33444]