Search results for "BOLD"

Herbicidal Activity of Peumus boldus and Drimys winterii Essential Oils from Chile

2011

[EN] The essential oil composition of Peumus boldus and Drimys winterii was analyzed by means of capillary GC-FID and GC-MS. More than 96% of the total oil components (43 and 54 compounds, respectively) were identified, with ascaridole (51.17 ± 9.51), p-cymene (16.31 ± 2.52) and 1,8-cineole (14.45 ± 2.99) as the main compounds in P. boldus and ¿-eudesmol (21.65 ± 0.41), followed of elemol (12.03 ± 0.34) and terpinen-4-ol (11.56 ± 1.06) in D. winterii. The herbicidal activity was tested against Amaranthus hybridus and Portulaca oleracea. P. boldus essential oil was the most phytotoxic against both weeds, inhibiting seed germination and seedling growth at all concentrations assayed (0.125-1 ¿…

Humboldt sobre Hermann y Dorothea de Goethe

2015

Esta intervención mía en este contexto tiene que ver con un proyecto de traducción del estudio de Humboldt sobre la epopeya o idilio de Goethe, Hermann y Dorothea. El texto de Humboldt es de 1798. El poema de Goethe, de 1797. El poema de Goethe es una obra en verso, en hexámetros. En una especie de prólogo en verso, asimismo en hexámetros, que Goethe escribió más tarde y que a veces se adjunta a la edición de Hermann y Dorothea, Goethe se define como el último homérida y se remite a la cultura clásica

Leopold von Ranke. Gli anni della formazione

2005

Prima monografia italiana sull'argomento, nella quale si mostra il posto che Ranke ha nella storia della filosofia classica tedesca.

The effect of S-(+)-boldine on the α1-adrenoceptor of the guinea-pig aorta

1996

1. The cardiovascular activity of S-(+)-boldine, an aporphine alkaloid structurally related to papaverine, was determined. The work includes functional studies on guinea-pig isolated aorta contracted with noradrenaline, caffeine, KCl or Ca2+, and on guinea-pig trachea contracted with acetylcholine or histamine. 2. S-(+)-boldine inhibited in a concentration-dependent manner the contractile response evoked by noradrenaline (10 microM) in guinea-pig aorta (IC50 = 1.4 +/- 0.2 microM) while the KCl depolarizing solution (60 mM)- or the Ca2+ (1 mM)-induced contractions were only partially affected by boldine up to 300 microM. In contrast, papaverine relaxed noradrenaline (NA), KCl or Ca2+ induced…

Noticias del botánico aragonés Baltasar Boldó

2018

Conocidos hoy los trabajos naturalísticos de Baltasar Boldó, traemos aquí varias noticias nuevas de su paso por la Universidad de Zaragoza y por la isla de Cuba. / Although the Naturalist work of Baltasar Boldó is already well-known, we bring new news of his stay both in the Universidad de Zaragoza and Cuba.

Author response: Cortex-wide BOLD fMRI activity reflects locally-recorded slow oscillation-associated calcium waves

2017

A possible structural determinant of selectivity of boldine and derivatives for the alpha 1A-adrenoceptor subtype.

1996

1. The selectivity of action of boldine and the related aporphine alkaloids, predicentrine (9-O-methylboldine) and glaucine (2,9-O-dimethylboldine) and alpha 1-adrenoceptor subtypes was studied by examining [3H]-prazosin competition binding in rat cerebral cortex. WB 4101 and benoxathian were used as selective alpha 1A-adrenoceptor antagonists. 2. In the competition experiments [3H]-prazosin (0.2 nM) binding was inhibited by WB 4101 and benoxathian. The inhibition curves displayed shallow slopes which could be subdivided into high and low affinity components (pKi = 9.92 and 8.29 for WB 4101, 9.35 and 7.94 for benoxathian). The two antagonists recognized approximately 37% of the sites with h…

Dialogo Politico

2015

Celebre dialogo in cui Ranke espone con efficacia il cosmo delle sue idee sulla storia, il senso scientifico dei dati, la tensione storica, le possibilità gnoseologiche della storiografia. In this well-known essay Ranke lays out his ideas upon history, historical forces and historiographical epistemology.

Different mechanism of relaxation induced by aporphine alkaloids in rat uterus.

1993

Abstract We have examined the uterine relaxant action of three aporphine molecules (S-glaucine, S-boldine and R-apomorphine) in two experimental conditions, with and without calcium in the bathing solution, and compared these effects with those obtained with the calcium antagonists verapamil and diltiazem. The present study shows that the alkaloids relax the uterine muscle but with different mechanisms of action. In Ca2+-containing solution all three alkaloids relaxed the uterus previously contracted by KCl or acetylcholine, but in Ca2+-free medium only R-apomorphine was able to relax oxytocin-induced contraction. The calcium antagonists, verapamil and diltiazem, relaxed KCl- or acetylcholi…

fMRI (Risonanza Magnetica funzionale)

2014

Ruolo della Risonanza Magnetica funzionale nel panorama delle tecniche RM "avanzate".