Search results for "PLUT"
showing 10 items of 153 documents
Environmental distribution and diversity of Bacillus thuringiensis in Spain.
1998
Bacillus thuringiensis was isolated from 301 out of 1,005 samples collected in Spain from agricultural and non-cultivated soils, dust from stored products, and dead insects. Based on the production of parasporal crystals, 1,401 isolates were identified as B. thuringiensis after examining 11,982 B. thuringiensis-like colonies. We found a greater presence of B. thuringiensis in dust from grain storages than in other habitats. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis of the spore-crystal mixtures revealed diverse populations of B. thuringiensis which were differentiated in at least 92 distinct protein profiles. Serological identification also showed great diversity among the S…
Efficiency of dihydroxamic and trihydroxamic siderochelates to extract uranium and plutonium from contaminated soils
2021
International audience; Actinide-based mineral phases occurring in contaminated soils can be solubilized by organic chelators excreted by plants, such as citrate. Herein, the efficiency of citrate towards U and Pu extraction is compared to that of siderophores, whose primary function is the acquisition of iron(III) as an essential nutrient and growth factor for many soil microorganisms. To that end, we selected desferrioxamine B (DFB) as an emblematic bacterial trishydroxamic siderophore and a synthetic analog, abbreviated (LCy,Pr)H2, of the tetradentate rhodotorulic acid (RA) produced by yeasts. Firstly, the uranyl speciation with both ligands was assessed in the pH range 2–11 by potentiom…
Resonance ionization mass spectroscopy for trace determination of plutonium in environmental samples
1997
Resonance ionization mass spectroscopy (RIMS) is a sensitive and isotope selective method and well suited for trace analysis of plutonium in the environment. After the chemical isolation of plutonium from soil, air filters or urine, e.g., it is electrolytically deposited as hydroxide on a tantalum backing and covered with a thin titanium layer. By heating such a sandwich filament in the RIMS-apparatus under vacuum an atomic beam of plutonium is produced. The atoms are ionized by a three-step resonant excitation using pulsed dye lasers, and the ions are mass-selectively detected with a time-of-flight (TOF) spectrometer and a multi channel plate detector. RIMS yields a low detection limit of …
Las cuatro muertes de Cleonice: poder, sexo, violencia y fantasmas
2019
Greek tradition links the death of regent Pausanias of Sparta with ghosts. In this paper, we focus on the well-known episode that revolves around Pausanias himself and a Byzantine maiden and is transmitted by Aristodemus, Plutarch and Pausanias Periegetes. The multiplicity of versions demands a comparative analysis, which we carry out taking into account the three spaces where the narrative action takes place (civic, intimate and ritual spaces). Results indicate a concordance between Plutarch and Pausanias Periegetes, as well as a dissonance between them and Aristodemus. This difference especially affects the narrative treatment of the maiden, a ghost properly so-called in Plutarch and Paus…
Libros bajo el hierro incandescente: marcas de fuego en los fondos de la Biblioteca Histórica
2022
Se presentan las marcas de fuego, recientemente localizadas en la colección Francisco Guerra de la Biblioteca Histórica de la Universidad Complutense, como contribución al rico o ámbito de estudio en procedencias coloniales. Colocadas en el canto de los libros, esta práctica de marcaje, utilizada por las comunidades religiosas novohispanas, perseguía no sólo el refuerzo de la seguridad de la colección, sino la distinción de las piezas más singulares. Esta tarea de identificación se ha podido abordar gracias a la cooperación del Catálogo Colectivo de Marcas de Fuego, promovido por la Biblioteca Histórica “José María Lafragua” y la Biblioteca Franciscana”, con el fin de reconstruir la colecci…
Reworking of the Tarim Craton by underplating of mantle plume-derived magmas: Evidence from Neoproterozoic granitoids in the Kuluketage area, NW China
2011
Abstract Most Neoproterozoic granitoids in the Kuluketage area, northern Tarim Craton are characterized by strongly depleted HREE abundances and high Sr/Y and (La/Yb) N ratios, showing typical geochemical features of adakitic rocks. Zircon U–Pb dating of three adakitic plutons yielded Neoproterozoic ages (754 ± 4, 790 ± 3 and 798 ± 3 Ma). The adakitic granitoids exhibit low MgO and TiO 2 contents. Their low Cr, Co and Ni abundances, low ɛ Hf ( t ) values (−21 to −11) and high FeO T /MgO ratios (mostly 2.2–2.9) preclude the possibility of being derived from partial melts of delaminated lower crust. The relatively low ɛ Hf ( t ) values and old Hf two-stage model ages ( T DM 2 = 2 . 42 – 3 .0 …
L'anima degli animali. Aristotele, frammenti stoici, Plutarco, Porfirio
2015
E' lecito maltrattare gli animali? E mangiarli? Molto del dibattito odierno sulla natura e sui diritti degli animali ha avuto prodromi antichi, anche se con categorie diverse dalle nostre. Il libro è una selezione di testi chiave sul tema, ritradotti per l'occasione e accompagnati da un commento storico-filologico, aprendo suggestive connessioni con la modernità. Il volume raccoglie l'ottavo e il nono libro della Historia animalium di Aristotele, i frammenti degli stoici sugli animali, i tre trattati di Plutarco sul vegetarianismo e sulla "questione animale" (il De esu carnium, il Bruta animalia ratione uti e il De sollertia animalium) e il De abstinentia di Porfirio
Zvaigžņotā Debess: 2014/15, Ziema (226)
2014
Contents: “ZVAIGŽŅOTĀ DEBESS” FORTY YEARS AGO: J.Stradiņš. Vestige of Otto Schmidt in Latvia (abridged) ; Leonora Roze. All-Union Conference in Latvian State University (abridged) ; DEVELOPMENTS in SCIENCE: K.Schwartz. Gravitational Waves and Cosmic Inflation ; DISCOVERIES: A.Alksnis. Light Echoes from Supernova 2014J in Galaxy M82 ; A.Alksnis. Discovery of the Benešov Meteorites 20 Years after the Bolide Event ; I.Pundure. Giant Filament on the Sun Watched by NASA's SDO ; I.Pundure. MAVEN’s Mars Exploration Mission Started ; SPACE RESEARCH and EXPLORATION: R.Misa. Plasma Engines and Ad Astra Rocket Company ; LATVIAN SCIENTISTS: J.Freimanis. Reviewing My 60 Years of Life (concluded) ; KĀRLI…
TIVOLI, HADRIAN'S VILLA: THE PLUTONIUM PROJECT (COMUNE DI TIVOLI, PROVINCIA DI ROMA, REGIONE LAZIO)
2021
The Universities of Pavia and Oxford continued their investigations in Villa Adriana, in the area called Plutonium, traditionally interpreted as a reproduction of the Underworld, and located on one of the highest rises of the complex, in the east part of the Villa. The excavations took place from 1 to 21 July 2019. A team of 12 graduate students and postdoctoral researchers took part in the project, both from Oxford and Pavia Universities (S. Andronio, I. Bossolino, E. Casarotti, A. Dalgkitsi, E. Di Virgilio, V. Jukic Buca, A. Poldi Allai, G. Restaino, T. Runeckles, A. Verde). Dr Gilberto Montali, from the University of Palermo, supervised the architectural survey and documentation of the a…
Il progetto Plutonium di Villa Adriana: prime considerazioni a margine del nuovo rilievo e prospettive di ricerca
2020
Nel corso del 2016 e 2017 la missione congiunta delle università di Oxford e Pavia ha condotto una serie di campagne di ricognizione, rilevamento (georadar e geomagnetico) e rilievo architettonico nell'area nota dalla letteratura archeologica come pertinente al Plutonium e Inferi di Villa Adriana. Il complesso, situato nella sona nord-orientale della Villa, in corrispondenza di un rilievo naturale e ai margini della proprietà demaniale è costituito da tre elementi principali: 1) una grotta artificiale/ninfeo, collocata all'estremità di una valletta artificiale, interamente scavata nel tufo (gli Inferi); 2) un grosso edificio costruito su alte sostruzioni concamerate (il Plutonium); 3) una r…