Search results for "magno"
showing 10 items of 157 documents
Giant enhancement to spin battery effect in superconductor/ferromagnetic insulator systems
2021
We develop a theory of the spin battery effect in superconductor/ferromagnetic insulator (SC/FI) systems taking into account the magnetic proximity effect. We demonstrate that the spin-energy mixing enabled by the superconductivity leads to the enhancement of spin accumulation by several orders of magnitude relative to the normal state. This finding can explain the recently observed giant inverse spin Hall effect generated by thermal magnons in the SC/FI system. We suggest a nonlocal electrical detection scheme which can directly probe the spin accumulation driven by the magnetization dynamics. We predict a giant Seebeck effect converting the magnon temperature bias into the nonlocal voltag…
Testing the ontogenetic base for the transient model of inflorescence development
2013
† Backgrounds and Aims: Current research in plant science has concentrated on revealing ontogenetic processes of key attributes in plant evolution. One recently discussed model is the ‘transient model’ successful in explaining some types of inflorescence architectures based on two main principles: the decline of the so called ‘vegetativeness’ (veg) factor and the transient nature of apical meristems in developing inflorescences. This study examines whether both principles find a concrete ontogenetic correlate in inflorescence development. † Methods: To test the ontogenetic base of veg decline and the transient character of apical meristems the ontogeny of meristematic size in developing inf…
Elementos utópicos en la India descrita por Onesícrito
2003
Onesícrito fue uno de los intelectuales más destacados de entre los que acompañaron a Alejandro Magno en su legendaria campaña. Desempeñó importantes cometidos: se entrevistó con los "gimnosofístas", fue el timonel de la nave real y, ante todo, es conocido por haber escrito una obra en la que, entre otros elementos, había una descripción del utópico reino de Musícano y de la región de Catea.
Cytotoxicity of 40 Egyptian plant extracts targeting mechanisms of drug-resistant cancer cells
2019
Abstract Background The multidrug resistance (MDR) phenotype encounters a major challenge to the success of established chemotherapy in cancer patients. We hypothesized that cytotoxic medicinal plants with novel phytochemicals can overcome MDR and kill MDR-cells with similar efficacy as drug sensitive cells. Purpose We evaluated plant extracts from an unexplored ecosystem in Egypt with unusual climate and nutrient conditions for their activity against sensitive and multidrug-resistant cancer cell lines. Material and methods/study design Methylene chloride: methanol (1:1) and methanol: H2O (7:3) extracts of 40 plants were prepared resulting in a sum of 76 fraction containing compounds with v…
Algunos episodios de la vida de Alejandro en la literatura medieval latina y romance
2015
La fuente clásica principal de la tradición medieval latina y vernácula de la vida de Alejandro Magno es la Historia de Alejandro de Quinto Curcio, principal referencia de la epopeya medieval Alexandreis de Gautier de Châtillon, que influyó grandemente a su vez en el Libro de Alexandre. Otra rama de la tradición la representa el Pseudo-Calístenes y sus traducciones latinas medievales, de Julio Valerio y del Arcipreste León de Nápoles. El estudio de algunos episodios significativos de la vida del emperador macedonio en diversas obras medievales latinas y vernáculas servirá para ponerlas en relación con esta doble tradición, la primera más histórica y la segunda novelesca. The main classical …
Molecular cloning and functional bacterial expression of a plant glucosidase specifically involved in alkaloid biosynthesis.
2000
Monoterpenoid indole alkaloids are a vast and structurally complex group of plant secondary compounds. In contrast to other groups of plant products which produce many glycosides, indole alkaloids rarely occur as glucosides. Plants of Rauvolfia serpentina accumulate ajmaline as a major alkaloid, whereas cell suspension cultures of Rauvolfia mainly accumulate the glucoalkaloid raucaffricine at levels of 1.6 g/l. Cell cultures do contain a specific glucosidase. known as raucaffricine-O-beta-D-glucosidase (RG), which catalyzes the in vitro formation of vomilenine, a direct intermediate in ajmaline biosynthesis. Here, we describe the molecular cloning and functional expression of this enzyme in…
Inelastic neutron scattering measurements on Nd2Fe14B and Y2Fe14B single crystals
1992
Abstract Inelastic neutron scattering measurements have been carried out on Nd 2 Fe 14 B and Y 2 Fe 14 B single crystals. Temperature dependent acoustic magnon dispersion curves have been found along the high-symmetry directions [0,0,1] and [1,0,0] with a gap at (0,0,2). Soft mode behaviour at spin wave vector q = 0 was observed for Nd 2 Fe 14 B near the spin reorientation temperature. The inelastic scattering intensity decreases steeply for larger q . Therefore, the dispersion curves could be measured until the middle of the Brillouin zone only. The experimental results are discussed in the frame of a classical spin wave model.
Botāniskā dārza sekciju "Augu daudzveidības pētījumi ex situ" un "Augu selekcija un introdukcija" tēžu krājums (2020. gada 30. janvāris, LU Botāniska…
2020
Latvijas Universitātes 78. starptautiskā zinātniskā konference LU Botāniskajā dārzā notiek 2020. gada 30. janvārī. Krājumā ir 13 ziņojumu kopsavilkumi: pieci kopsavilkumi LU prioritārās tēmas "Ekoloģija un bioloģiskā daudzveidība" apakštēmas/sekcijas "Augu daudzveidības pētījumi ex situ" un astoņi kopsavilkumi sekcijas "Augu selekcija un introdukcija" ziņojumiem.
GIAN DOMENICO ROMAGNOSI INVENTORE DEL DIRITTO AMMINISTRATIVO?
2016
Il presente lavoro mira a verificare il grado reale di originalità del primo grande studioso italiano di diritto amministrativo: Gian Domenico Romagnosi. Lo studio delle fonti mostra che Egli fu debitore della dottrina giuridica francese degli inizi del XIX sec.. Tuttavia, nei rispetti del primato rivoluzionario della legge, il suo ancoraggio alla settecentesca ragione naturale lasciava aperto uno spazio di "giuridicità" dove la legge non poteva arrivare o dove era bene che non arrivasse: uno spazio sottoposto al principio di proporzionalità. E fu proprio grazie all'equità, non alla legge, che il Conseil d'État costruì il più grande judge-made law del XIX sec. e quelle straordinarie garanzi…
Orobanche australis Moris ex Bertol. the correct name for O. thapsoides Lojac. (Orobanchaceae)
2022
The taxonomic relationships between Orobanche australis and O. thapsoides are analyzed through the study of the original material. These species are also compared with other morphologically similar ones occurring in the Mediterranean (O. canescens, O. pubescens, O. palaestina, O. amethystea). The lectotype of O. palaestina is designated. From the comparison of these taxa it is evident that O. australis and O. thapsoides refer to the same taxon, to which the name O. australis must be given by priority. The distribution of this species includes Sardinia, Sicily, Peninsular Italy and Southern France. It grows on pastures from the sea level to about 1000 m of altitude, host of Asteraceae. An id…