Search results for "Bell"
showing 10 items of 1130 documents
Selective regional distribution of tubulin induced in cerebrum by hyperammonemia
1989
Ingestion of ammonium induces hyperammonemia which increases tubulin content in cerebrum but not in cerebellum. We have dissected 11 discrete areas of cerebrum and quantified the tubulin content in control and hyperammonemic rats. An heterogeneity in the induction of tubulin is shown. The areas more affected are ventral hippocampus, dorsal hippocampus, hypothalamus, septum, reticular formation and frontal cortex, in which tubulin content increased by 63%, 27%, 32%, 48%, 45%, and 25%, respectively, after two months of feeding the ammonium diet.
Pedaleo de brazos en personas con lesión medular, parálisis cerebral o ataxia cerebelosa: Parámetros fisiológicos. [Armcrank pedaling in persons with…
2016
espanolLos desordenes neurologicos generan afectacion fisica y derivan en sedentarismo, enfermedades coronarias y obesidad o diabetes, reduciendo tanto la esperanza como la calidad de vida. La oferta de actividad fisica adaptada es escasa por falta de informacion especifica sobre la forma de adecuarlo y dosificarlo a las personas que presentan estos desordenes. Con el fin de comparar el efecto del ejercicio de pedaleo de brazos sobre la respuesta fisiologica y la percepcion del esfuerzo, en 8 personas con lesion medular, 4 con paralisis cerebral y 4 con ataxia de Friedreich, se analizo su respuesta fisiologica, asi como su percepcion subjetiva al esfuerzo, frente a un grupo Control (16 part…
Two new sesquiterpene derivatives from the Tunisian endemic Ferula tunetana Pom.
2010
A new sesquiterpene ester, tunetanin A (1), a new sesquiterpene coumarin, tunetacoumarin A (2), together with eight known compounds, i.e., coladin (3), coladonin (4), isosmarcandin (5), 13-hydroxyfeselol (6), umbelliprenin (7) propiophenone (8), beta-sitosterol (9), and stigmasterol (10), were isolated from the roots of Ferula tunetana. Their structures were elucidated on the basis of extensive spectroscopic methods, including 1D- and 2D-NMR experiments and MS analysis, as well as by comparison with published data. The cytotoxicity of compounds 1-7 towards two human colon cancer cell lines, HT-29 and HCT 116, was evaluated. Compounds 3, 4, and 6 showed weak cytotoxic activities.
Monotone Concave Operators: An application to the existence and uniqueness of solutions to the Bellman equation
2008
We propose a new approach to the issue of existence and uniqueness of solutions to the Bellman equation, exploiting an emerging class of methods, called monotone map methods, pioneered in the work of Krasnosel’skii (1964) and Krasnosel’skii-Zabreiko (1984). The approach is technically simple and intuitive. It is derived from geometric ideas related to the study of fixed points for monotone concave operators defined on partially order spaces.
A comparative analysis to study editing of small noncoding BC200- and Alu transcripts in brain of prion-inoculated rhesus monkeys (M. Mulatta).
2012
Small retroelements (short interspersed elements, abbreviated SINEs) are abundant in vertebrate genomes. Using RNA isolated from rhesus monkey cerebellum and buffy coat, reverse-transcription polymerase chain reaction (RT PCR) was applied to clone cDNA of BC200 and Alu RNAs. Transcripts containing Alu-SINE sequences may be subjected to extensive RNA editing by ADAR (adenosine deaminases that act on RNA) deamination. Abundance of Alu transcripts was determined with real-time RT PCR and was significantly higher than BC200 (brain cytoplasmic) in cerebellum. BC200 transcripts were absent from buffy coat cells. Availability of the rhesus genome sequence allowed the BC200 transcripts to be mapped…
La trahison au Moyen Âge
2009
La trahison est une préoccupation constante de la société médiévale, difficile à appréhender à des siècles de distance car ses acceptions sont fluctuantes et ses visages multiples. Réunis en congrès à Lyon au mois de juin 2008, plusieurs chercheurs - historiens des textes et des images, littéraires, juristes, épigraphistes - travaillant sur l'ensemble des Ve-XVe siècles, ont croisé leurs approches pour parvenir à cerner ce que les hommes du Moyen Âge considéraient comme trahison et quel était le contenu de leur discours sur le sujet. La présente synthèse regroupe leurs contributions et fait état de leurs réflexions et conclusions. Dans une société très normalisée comme l'est la société médi…
Espanya: un indret on tot podria ser jurídicament diferent
2022
Els intel·lectuals espanyols davant les «altres» cultures | Conversa amb Víctor Gómez Pin | Ernst Cassirer, Pedro Ruiz, Jordi Nieva, Carles Torner, Jordi Palafox, Josep V. Boira
Reminiscenze e rielaborazioni avianee in due carmi di Bellino Bissolo (Spec. vite I 5; I 9)
2020
L'intervento è dedicato alla figura e all'opera di Bellino Bissolo, poeta milanese del Duecento, autore di tre testi didattico-moralistici in latino e in distici elegiaci, il «Liber legum moralium», il «De regimine vite et sanitatis» e, soprattutto, lo «Speculum vite». Nella prima parte del testo viene tracciato lo "status quaestionis" relativo all'autore, all'opera e agli studi su di essa. La seconda e più ampia parte è invece fondata sulla lettura e l'analisi di due brevi componimenti dello «Speculum vite» (I 5; I 9), di carattere e impianto narrativo-favolistico, per entrambi i quali si ipotizza una fruizione, da parte del Bissolo, delle favole di Aviano, che tanto successo hanno avuto n…
Dynamics of nitrogen uptake in young 'Nocellara del Belice' olive trees
2008
Involvement of the long arm of chromosome 9 in medulloblastoma in an adult.
1997
Abstract Medulloblastoma is the most common primitive neuroectodermal tumor (PNET) in children, but is very rare in adults. An isochromosome for the long arms of 17, i(17q), is found in about 30% of pediatric cases. Cytogenetic studies in adults are very scarce; only six cases have been described cytogenetically: three cases had normal karyotype, two were studied partially, and another presented only two clonal structural anomalies: del(9)(q12) and del(11)(q22). We studied the chromosomes from medulloblastoma in a 27-year-old woman and found one hypotetraploid stemline with clonal alterations. In the structural anomalies, chromosomes 3, 9, 12, and i(17q) were involved. Chromosome 9 presente…