Search results for "Vis"

α-Conotoxins EpI and AuIB switch subtype selectivity and activity in native versus recombinant nicotinic acetylcholine receptors

2003

The Xenopus laevis oocyte expression system was used to determine the activities of alpha-conotoxins EpI and the ribbon isomer of AuIB, on defined nicotinic acetylcholine receptors (nAChRs). In contrast to previous findings on intracardiac ganglion neurones, alpha-EpI showed no significant activity on oocyte-expressed alpha3beta4 and alpha3beta2 nAChRs but blocked the alpha7 nAChR with an IC50 value of 30 nM. A similar IC50 value (103 nM) was obtained on the alpha7/5HT3 chimeric receptor stably expressed in mammalian cells. Ribbon AuIB maintained its selectivity on oocyte-expressed alpha3beta4 receptors but unlike in native cells, where it was 10-fold more potent than native alpha-AuIB, had…

Characterization and antimicrobial activity of the volatile components of the flowers of Magydaris tomentosa (Desf.) DC. collected in Sicily and Alge…

2014

The essential oils of the flowers of Magydaris tomentosa (Desf.) DC. (Apiaceae) collected in Sicily (MSi) and Algeria (MAl), respectively, were obtained by hydrodistillation, and their compositions were analysed. The analyses allowed the identification and quantification of 23 components in MSi and 60 compounds in MAl, respectively, showing a very different profile in the composition of the two populations. The main components of MSi were cembrene (28.2%), α-springene (17.5%) and β-springene (14.8%), also present in MAl but in lesser amount (0.4%, 1.8% and 0.9%, respectively), whereas the principal constituents of MAl were (E)-nerolidol (35.4%), α-costol (13.3%) and β-costol (6.8%). Both MS…

A 2600-year record of past polycyclic aromatic hydrocarbons (PAHs) deposition at Holzmaar (Eifel, Germany)

2014

Polycyclic aromatic hydrocarbons (PAHs) are a proxy for climate- and human-related historical fire activity which has rarely been used beyond 1800 AD. We explored the concentration and composition patterns of PAHs together with other proxies (charcoal, C, N, S, δ13C, δ15N, and δ34S) in a sediment core of Holzmaar as indicators of variations in climate and anthropogenic activity over the past 2600 years. The concentrations of pyrogenic PAHs remained low (< 500 ng g− 1) from the pre-Roman Iron Age (600 BC) until the first significant increases to ca. 1000–1800 ng g− 1 between 1700 and 1750 AD related to regional iron production. The highest increases in pyrogenic PAH concentrations occurred w…

Zooloģijas muzeja raksti, Nr. 15 Vertebrata

1976

Zooloģijas muzeja raksti, Nr. 12 Vertebrata

1975

Linguistica Lettica, Nr. 5

1999

Valoda: nozīme un forma. 4: Kategoriju robežas gramatikā

2014

Rakstu krājums "Valoda: nozīme un forma. 4. Kategoriju robežas gramatikā" ir LU 71. konferences Humanitāro zinātņu fakultātes Latviešu un vispārīgās valodniecības katedras 27.02.2013. rīkotās sekcijas referātu apkopojums.

Appartenenza e alterità: sull’idea di cittadinanza nell’esperienza giuridica romana

2022

The paper discusses a plethora of ideas regarding the concept of Roman citizenship, which is addressed in the light of a theory of fellowship (meaning ‘to be part of a given community’) and a theory of otherness (meaning ‘a relationship with someone who is not part of a given community’). There will be a brief overview of the development of citizenship in Ancient Roman history (during the period of Kings, Republican and Imperial Rome). Several interpretations of well-known phrases, such as ‘civis Romanus sum’ or ‘adipisci civitatem ob virtutem’, are discussed and many phenomena are analyzed, such as the expulsion of the Latin population from Rome in the second century B.C. The purpose of th…

Translation ‘going social’? Challenges to the (Ivory) Tower of Babel

2010

The discussion of “turns” or “paradigmatic shifts” which we can witness in the last few years in Translation Studies undoubtedly testifies to the discipline’s increasing establishment and recognition within the scientific community and of the increasing practice of a transdisciplinary research. These shifts also include what has been called the “sociological turn”, which comprises the cluster of questions dealing not only with the networks of agents and agencies and the interplay of their power relations, but also the social discursive practices which mould the translation process and which decisively affect the strategies of a text to be translated. This paper seeks to foreground some of t…