Tifones y gigantes en el mundo macedonio: el rey como símbolo del orden cósmico

Este artículo analiza la existencia de un posible ritual en la antigua Macedonia que fuese similar al Akîtu babilonio. Pensamos que la victoria de Zeus sobre sus enemigos en la gigantomaquia y tifonomaquia fue celebrada por los reyes macedonios para fortalecer su posición en el poder. Aunque no hay evidencias directas de ello, tenemos una serie de diferentes fuentes en las cuales los macedonios están relacionados directa o indirectamente con Tifón y los gigantes. Además, la estratégica importancia del monte Olimpo para los macedonios nos hace pensar que la victoria de Zeus sobre las fuerzas del mal fue conmemorada de alguna forma por ellos.

FACS-based purification of Arabidopsis microspores, sperm cells and vegetative nuclei

Background: The male germline in flowering plants differentiates by asymmetric division of haploid uninucleated microspores, giving rise to a vegetative cell enclosing a smaller generative cell, which eventually undergoes a second mitosis to originate two sperm cells. The vegetative cell and the sperm cells activate distinct genetic and epigenetic mechanisms to control pollen tube growth and germ cell specification, respectively. Therefore, a comprehensive characterization of these processes relies on efficient methods to isolate each of the different cell types throughout male gametogenesis. Results: We developed stable transgenic Arabidopsis lines and reliable purification tools based on Fluorescence-Activated Cell Sorting (FACS) in order to isolate highly pure and viable fractions of each cell/nuclei type before and after pollen mitosis. In the case of mature pollen, this was accomplished by expressing GFP and RFP in the sperm and vegetative nuclei, respectively, resulting in 99% pure sorted populations. Microspores were also purified by FACS taking advantage of their characteristic small size and autofluorescent properties, and were confirmed to be 98% pure. Conclusions: We provide simple and efficient FACS-based purification protocols for Arabidopsis microspores, vegetative nuclei and sperm cells. This paves the way for subsequent molecular analysis such as transcriptomics, DNA methylation analysis and chromatin immunoprecipitation, in the developmental context of microgametogenesis in Arabidopsis.

Sensory gating and its modulation by cannabinoids: electrophysiological, computational and mathematical analysis

Gating of sensory information can be assessed using an auditory conditioning-test paradigm which measures the reduction in the auditory evoked response to a test stimulus following an initial conditioning stimulus. Recording brainwaves from specific areas of the brain using multiple electrodes is helpful in the study of the neurobiology of sensory gating. In this paper, we use such technology to investigate the role of cannabinoids in sensory gating in the CA3 region of the rat hippocampus. Our experimental results show that application of the exogenous cannabinoid agonist WIN55,212-2 can abolish sensory gating. We have developed a phenomenological model of cannabinoid dynamics incorporated within a spiking neural network model of CA3 with synaptically interacting pyramidal and basket cells. Direct numerical simulations of this model suggest that the basic mechanism for this effect can be traced to the suppression of inhibition of slow GABAB synapses. Furthermore, by working with a simpler mathematical firing rate model we are able to show the robustness of this mechanism for the abolition of sensory gating.

Ferns and fern allies of Guatemala. Robert G. Stolze ; the genus Elaphoglossum by: John T. Mickel ; the genus Thelypteris by: Alan R. Smith.

n.s. no.6(1981)

Pteridophyta of Peru. Rolla M. Tryon, Robert G. Stolze ; with the collaboration of: R. James Hickey, Benjamin Øllgaard.

n.s. no.34(1994)

Partie occidentale de l'Empire de Russie, où se trouve distinguée la Russie européenne, divisée par ses gouvernemens ou provinces de Dwinskoy, Oloneckoy, Bielozerskoy, Archangel, Nowogorod, Wolockoy, Ustiuskoy, Moscow, Kiowie, Bielogorod, Woroneskoy, et la Petite Tatarie. La partie Asiatique contient les provinces de Berezowskoy, Mangajeiskoy, Wiatka, Solkamskoy, Pelymskoy, ... Le gouvernement d'Astrachan et les confins du royaume des Kalmaks Eleuths. Dressée d'après les cartes d l'Atlas Russien par le s.r Robert de Vaugondy, fils de m.r Robert geographe ordin'. du roi. Avec privilege 1750.

[N. 1:9000000].

Partie septentrionale de la Russie Européenne òu sont distinguées éxactement toutes les provinces, d'aprés le détail de l'Atlas Russien. Par le s.r Robert de Vaugondy fils. géog. ordin'. du roi. Avec privilége 1753.

Janamittakaavat: Mille pas geometriques ; Woerstes de Russie.

Partie septentrionale de la Russie Européenne òu sont distinguées éxactement toutes les provinces, d'aprés le détail de l'Atlas Russien. Par le s.r Robert de Vaugondy fils. géog. ordin'. du roy.

Janamittakaavat: Milles d'Italie ; Woerstes de Russie.

Curlande, Livonie, Ingrie et partie meridionale de Finlande. Par le s.r Robert de Vaugondy fils de m.r Robert geogr. ordin. du roi. Avec privilege 1749.

Janamittakaava: Lieues marines.

[4/7/20, McGoldrick Field, Brooklyn, les pentathlètes R. N.] Irving, Leon Perrine [University of Idaho], Joseph Baker [University of Michigan], Brutus Hamilton [University of Missouri], Everett [Lewis] Bradley [University of Kansas], R. [Robert] Le Gendre [Georgetown University] : [photographie de presse] / [Agence Rol]

R��férence bibliographique : Rol, 60119