Estudio fitoquímico preliminar del extracto etanólico de la corteza de Virola peruviana (A.DC.) Warb. (Myristicaceae)

Se presentan los resultados de la marcha fitoquímica preliminar de la corteza de Virola peruviana (extracto etanólico total) y de actividad biológica frente a Artemia salina (extracto etanólico y las tres fracciones obtenidas a través de fraccionamiento soxhlet correspondientes a los solventes Eter de petróleo (EDP), cloroformo (CHCl3) y acetato de etilo (AcOEt) utilizando el software Probit con un nivel de confianza del 95%. Se detectó presencia de alcaloides, esteroides y/o triterpenoides y lactonas terpénicas en poca cantidad y taninos en mayor cantidad. Ninguno de los extractos probados en el bioensayo es activo frente a Artemia salin

Estudio fitoquímico preliminar del extracto etanólico de la corteza de Virola peruviana (A.DC.) Warb. (Myristicaceae)

Se presentan los resultados de la marcha fitoquímica preliminar de la corteza de Virola peruviana (extracto etanólico total) y de actividad biológica frente a Artemia salina (extracto etanólico y las tres fracciones obtenidas a través de fraccionamiento soxhlet correspondientes a los solventes Eter de petróleo (EDP), cloroformo (CHCl3) y acetato de etilo (AcOEt) utilizando el software Probit con un nivel de confianza del 95%. Se detectó presencia de alcaloides, esteroides y/o triterpenoides y lactonas terpénicas en poca cantidad y taninos en mayor cantidad. Ninguno de los extractos probados en el bioensayo es activo frente a Artemia salin

Cell Cycle Arrest of Stamen Initials in Maize Sex Determination

The maize sex determination pathway results in the arrest of stamen in ear spikelets and the abortion of pistils in both the tassel spikelets and in the secondary florets of ear spikelets. Arrested stamen cells showed no signs of DNA fragmentation, an absence of CYCLIN B expression, and an accumulation of the negative cell cycle regulator WEE1 RNA

Search for the Standard Model Higgs Boson in the Decay Channel H -> ZZ -> 4l in pp Collisions at root s=7 TeV

A search for a Higgs boson in the four-lepton decay channel H→ZZ, with each Z boson decaying to an electron or muon pair, is reported. The search covers Higgs boson mass hypotheses in the range of 110100GeV (with 13 below 160GeV), while 67.1±6.0 (9.5±1.3) events are expected from background. The four-lepton mass distribution is consistent with the expectation of standard model background production of ZZ pairs. Upper limits at 95% confidence level exclude the standard model Higgs boson in the ranges of 134-158GeV, 180-305GeV, and 340-465GeV. Small excesses of events are observed around masses of 119, 126, and 320GeV, making the observed limits weaker than expected in the absence of a signal. © 2012 CERN

Impact of PhACs on Soil Microorganisms

International audienceThe use of reclaimed water in crop irrigation helps to mitigate water shortage. The fertilization of arable soils with sewage sludge, biosolids, or livestock manure reduces extensive application of synthetic fertilizers. However, both practices lead to the introduction of pharmaceutical active compounds (PhACs) in arable soil, known to host a wide range of living organisms, including microorganisms which are supporting numerous ecosystem services. In soils, the fate of PhACs is governed by different abiotic and biotic processes. Among them, soil sorption and microbial transformation are the most important ones and determine the fate, occurrence, and dispersion of PhACs into the different compartments of the environment. The presence of PhACs in soils can compromise the abundance, diversity, and activity of the soil microbial community which is one of the key players in a range of soil ecosystem services. This chapter reviews the current knowledge of the effects of PhACs, commonly found in wastewater effluents and derived organic fertilizers, on the soil microbial community