HISTO-ANATOMICAL AND PRELIMINARY CHROMATOGRAPHIC ANALYSIS ON POLYGALA VULGARIS L. (POLYGALACEAE) SPECIES

The paper highlights the histo-anatomical investigation of root, rhizome, aboveground stem and leaf of Polygala vulgaris L. (Polygalaceae) species, harvested in August 2016, from southern Romania, as well as the preliminary thin-layer chromatographic analysis of the polyphenols content of the aerial parts (Polygalae vulgaris herba). Rutin was identified and quantified starting from the 11 TLC fingerprint bands

HISTO-ANATOMICAL AND PRELIMINARY TLC ANALYSIS ON TEUCRIUM CHAMAEDRYS L. (LAMIACEAE) SPECIES

For Teucrium chamaedrys L. (Lamiceae) species, harvested in July 2016, from Dolj County (southwestern Romania), the paper presents the histo-anatomical investigation of roots, rhizomes, stolons, aboveground stems and leaves, and the preliminary TLC analysis of the poyphenols from the aerial parts (Teucriiherba). Chlorogenic acid was identified starting from the 11 fingerprint chromatographic bands

Quasilinear Schr\"odinger equations I: Small data and quadratic interactions

In this article we prove local well-posedness in low-regularity Sobolev spaces for general quasilinear Schr\"odinger equations. These results represent improvements of the pioneering works by Kenig-Ponce-Vega and Kenig-Ponce-Rolvung-Vega, where viscosity methods were used to prove existence of solutions in very high regularity spaces. Our arguments here are purely dispersive. The function spaces in which we show existence are constructed in ways motivated by the results of Mizohata, Ichinose, Doi, and others, including the authors.Comment: 25 pages, 0 figures, References Updated, Typos Fixe

On the ill-posedness result for the BBM equation

We prove that the initial value problem (IVP) for the BBM equation is ill-posed for data in Hs(R), s < 0 in the sense that the ow-map u0 7! u(t) that associates to initial data u0 the solution u cannot be continuous at the origin from Hs(R) to even D0(R) at any _xed t > 0 small enough. This result is sharp.Fundação para a Ciência e a Tecnologia (FCT

Genomic insights into the origin of farming in the ancient Near East

We report genome-wide ancient DNA from 44 ancient Near Easterners ranging in time between ~12,000 and 1,400 BC, from Natufian hunter–gatherers to Bronze Age farmers. We show that the earliest populations of the Near East derived around half their ancestry from a ‘Basal Eurasian’ lineage that had little if any Neanderthal admixture and that separated from other non-African lineages before their separation from each other. The first farmers of the southern Levant (Israel and Jordan) and Zagros Mountains (Iran) were strongly genetically differentiated, and each descended from local hunter–gatherers. By the time of the Bronze Age, these two populations and Anatolian-related farmers had mixed with each other and with the hunter–gatherers of Europe to greatly reduce genetic differentiation. The impact of the Near Eastern farmers extended beyond the Near East: farmers related to those of Anatolia spread westward into Europe; farmers related to those of the Levant spread southward into East Africa; farmers related to those of Iran spread northward into the Eurasian steppe; and people related to both the early farmers of Iran and to the pastoralists of the Eurasian steppe spread eastward into South Asia