Entity

Time filter

Source Type


Singh S.K.,Eastern Regional Center | Pocs T.,Eszterhazy Karoly University
Cryptogamie, Bryologie | Year: 2016

Cololejeunea indica Pandé & Misra (Lejeuneaceae: Marchantiophyta) previously treated as a synonym of C. spinosa (Horik.) Pandé & Misra, is reinstated as a distinct species. It is characterised by a 4-celled, elongate vitta accompanied by basal ocelli and the presence of a single-celled stylus. Cololejeunea planiflora Benedix is a new synonym of Cololejeunea indica. A detailed description is provided, based on new and recent collections of this species from Mizoram. © 2016 Adac. Tous droits réservés. Source


Pocs T.,Eszterhazy Karoly University | Ochyra R.,Polish Academy of Sciences | Bednarek-Ochyra H.,Polish Academy of Sciences
Cryptogamie, Bryologie | Year: 2016

A taxonomic history of Lepidozia cupressina (Sw.) Lindenb. (Jungermannia cupressina Sw.) is presented and its diagnostic characters and variability in sub-Saharan Africa are thoroughly discussed. Three subspecies are currently distinguished in this region, namely subsp. cupressina, subsp. africana (Steph.) Pócs, stat. et comb. nov., which occurs in the East African Indian Ocean islands and in the Eastern Arc of continental East Africa, as well as on the island of St. Helena in the Atlantic Ocean, and subsp. natalensis (Steph.) Pócs which is restricted to southern Africa. The other two subspecies, subsp. pinnata (Hook.) Pócs and subsp. quinquefida (Steph.) Pócs, are merged with the type subspecies of L. cupressina. A key to the recognition of the subspecies of L. cupressina is provided. Lepidozia chordulifera Taylor, a temperate species widely distributed in southern South America, is taxonomically assessed and some of its diagnostic traits are illustrated. It is considered to be conspecific with L. cupressina subsp. cupressina. Thanks to this taxonomic conclusion the range extension of L. cupressina in southern South America, including the Falkland Islands, is sanctioned and, additionally, distribution of this species is extended to subantarctic South Georgia and the northern maritime Antarctic. The current geographical range of L. cupressina is reviewed and mapped and it may be designated as a bipolar temperate species with numerous transitional stations in the tropical mountains. In the Southern Hemisphere L. cupressina is a typical Afro-American oreophyte. © 2016 Adac. Tous droits réservés. Source


Marekha B.A.,Lille University of Science and Technology | Marekha B.A.,French National Center for Scientific Research | Koverga V.A.,Lille University of Science and Technology | Koverga V.A.,University of Kharkiv | And 6 more authors.
Journal of Physical Chemistry B | Year: 2016

Description of the local microscopic structure in ionic liquids (ILs) is a prerequisite to obtain a comprehensive understanding of the influence of the nature of ions on the properties of ILs. The local structure is mainly determined by the spatial arrangement of the nearest neighboring ions. Therefore, the main interaction patterns in ILs, such as cation-anion H-bond-like motifs, cation-cation alkyl tail aggregation, and ring stacking, were considered within the framework of the nearest-neighbor approach with respect to each particular interaction site. We employed classical molecular dynamics (MD) simulations to study in detail the spatial, radial, and orientational relative distribution of ions in a set of imidazolium-based ILs, in which the 1-butyl-3-methylimidazolium (C4mim+) cation is coupled with the acetate (OAc-), chloride (Cl-), tetrafluoroborate (BF4 -), hexafluorophosphate (PF6 -), trifluoromethanesulfonate (TfO-), or bis(trifluoromethanesulfonyl)amide (TFSA-) anion. It was established that several structural properties are strongly anion-specific, while some can be treated as universally applicable to ILs, regardless of the nature of the anion. Namely, strongly basic anions, such as OAc- and Cl-, prefer to be located in the imidazolium ring plane next to the C-H2/4-5 sites. By contrast, the other four bulky and weakly coordinating anions tend to occupy positions above/below the plane. Similarly, the H-bond-like interactions involving the H2 site are found to be particularly enhanced in comparison with the ones at H4-5 in the case of asymmetric and/or more basic anions (C4mimOAc, C4mimCl, C4mimTfO, and C4mimTFSA), in accordance with recent spectroscopic and theoretical findings. Other IL-specific details related to the multiple H-bond-like binding and cation stacking issues are also discussed in this paper. The secondary H-bonding of anions with the alkyl hydrogen atoms of cations as well as the cation-cation alkyl chain aggregation turned out to be poorly sensitive to the nature of the anion. © 2016 American Chemical Society. Source


Csutoras C.,Eszterhazy Karoly University | Racz L.,Eszterhazy Karoly University | Racz K.,Egri Korona Winehouse Ltd. | Futo P.,Eszterhazy Karoly University | And 2 more authors.
Microchemical Journal | Year: 2013

The change of ochratoxin A (OTA) content during must fermentation processes in different white, rose and red must samples was investigated by the use of selected yeast strains of Saccharomyces cerevisiae as starter cultures. Levels of OTA in wine must and lees were determined by high-performance liquid chromatography (HPLC) combined with diode array detection (DAD). Due to the addition of yeast strains the OTA concentration of the liquid phase decreased by 73-90%, while in the lees it increased continuously during the 90 day long fermentation period. The removal efficiency of OTA increased in the following order: white < rose < red musts. The fermentation process and the life-circle of the yeast strains were not affected by the added amount of OTA. © 2012 Elsevier B.V. Source


Del Carlo M.,University of Teramo | Sergi M.,University of Teramo | Giuliani M.,University of Teramo | Compagnone D.,University of Teramo | Kiss A.,Eszterhazy Karoly University
Lecture Notes in Electrical Engineering | Year: 2011

In the present study we report the use of gold screen printed electrodes for the detection of the oxidized form of Benzo[a]pyrene via DNA based sensing. Benzo[a]pyrene-r-7,t-8-dihydrodiol-t-9,10-epoxide (DE-BaP) was the target molecule. Our approach consisted in the design of an electrochemical biosensor able to generate a response upon the formation of a stable adduct between DNA and DE-BaP. Such a device should be, in principle, able to predict the formation of an adduct between an immobilized DNA strand and the toxic molecule. © 2011 Springer Science+Business Media B.V. Source

Discover hidden collaborations