Search results for "ATRA"
showing 10 items of 381 documents
Ensanchamiento y elevación del suelo sinusal maxilar con osteotomos compresivos
2006
Objetivo: El objetivo de este artículo es evaluar la eficacia de la técnica del ensanchamiento alveolar posterior y elevación del reborde alveolar del maxilar superior mediante el uso de los osteótomos compresivos ( Quirurgical Bontempi, España) especialmente diseñados para los implantes Osseotite NT y Osseotite NT Certain de 3i ( Implants Innovations, USA). Material y métodos: En el estudio se incluyeron 24 pacientes (16 mujeres y 8 hombres) siguiendo los criterios de inclusión y exclusión de Albrektsson, que presentaban un déficit óseo en anchura y altura del maxilar superior. Se colocaron 48 implantes Osseotite ( cuatro Osseotite Standard, seis Ossoetite NT y treinta y ocho NT Certain (3…
«La speranza de’ regni». Celebrazione e spettacolo in tre 'feste' napoletane: Paisiello (1768), Jommelli (1772), Cafaro (1775)
2011
The genre of 'festa teatrale' had a large diffusion and a great social and political importance in the Neapolitan culture of the Eighteenth Century. The article examines three main examples, created in connection with crucial dynastic events: the marriage of the young king Ferdinand IV with Maria Carolina of Absburg in 1768, the birth of their first daughter in 1772, and the birth of their first son (and hereditary prince) in 1775. The librettos and the scores are analyzed in detail, with a specific focus on allegorical and celebratory features.
Pasquale Cafaro - Il natal d'Apollo, partitura
2022
Description of the score of Pasquale Cafaro's "Il natal d'Apollo", a 'festa teatrale' on text by Saverio Matteri composed to celebrate the birth of prince Carlo Tito (1775), son of the kings of Naples Ferdinand IV and Maria Carolina, with brief discussion of the most interesting dramaturgical and musical features.
New oxidative derivatives of atractyligenin and their cytotoxic activity
2006
ent-Kauranes are naturally occurring diterpenoids isolated from several families, such as Asteraceae and Lamiaceae. These compounds have attracted interest because of their structures and their biological activities as anti-tumorals, anti-HIV and anti-bacterials [1]. Extensive chemical work [2] was carried out on the structure of atractyligenin, the nor-diterpene aglycone of the glucoside atractyloside, occurring, together with its diterpene homologous carboxy-atractyloside, in the root of Atractylis gummifera L. (Compositae). The interest for these compounds was stimulated by the high toxicity [3] of both glucosides, responsible of many deadly poisoning in past time. Due to the 15-hydroxyl…
The Structure and the Stereochemistry of Atractyliretin
1986
The nor-kaurane diterpene Atractyliretin was obtained by acid hydrolysis of Atractyloside, a toxic substance isolated from ATRACTYLIS GUMMIFERA L (Compositae). On the basis of spectral (IR, (1)H-NMR, (13)C-NMR and MS) analysis and chemical degradation its structure and stereochemistry was identified as 4.
The Effect of Temperature and Radical Protection on the Photoinhibition of Spinach Thylakoids
1992
Photoinhibition of spinach thylakoids was studied by examination the inactivation of different parts of the electron transport chain, the decline of the variable fluorescence and the loss of atrazine binding sites. The results obtained after photoinhibition at 20° C and 0° C revealed an inactivation at the QB-site of the D1-protein as the first event in the course of photoinhibition. The natural antioxidants glutathione and ascorbate as well as the enzymes SOD and catalase diminished photoinhibition to similar extents. Further protection was achieved through combination of both radical defense systems. In addition to the radical scavenging properties glutathione and ascorbate have reducing …
Quantum dots functionalised artificial peptides bioinspired to the D1 protein from the Photosystem II of Chlamydomonas reinhardtii for endocrine disr…
2021
Herein we describe the design and synthesis of novel artificial peptides mimicking the plastoquinone binding niche of the D1 protein from the green photosynthetic alga Chlamydomonas reinhardtii, also able to bind herbicides. In particular, molecular dynamics (MD) simulations were performed to model in silico the behaviour of three peptides, D1Pep70-H, D1Pep70-S264K and D1Pep70-S268C, as genetic variants with different affinity towards the photosynthetic herbicide atrazine. Then the photosynthetic peptides were functionalised with quantum dots for the development of a hybrid optosensor for the detection of atrazine, one of the most employed herbicides for weed control in agriculture as well …
Paratransgenic manipulation of a tsetse microRNA alters the physiological homeostasis of the fly’s midgut environment
2021
Tsetse flies are vectors of parasitic African trypanosomes, the etiological agents of human and animal African trypanosomoses. Current disease control methods include fly-repelling pesticides, fly trapping, and chemotherapeutic treatment of infected people and animals. Inhibiting tsetse’s ability to transmit trypanosomes by strengthening the fly’s natural barriers can serve as an alternative approach to reduce disease. The peritrophic matrix (PM) is a chitinous and proteinaceous barrier that lines the insect midgut and serves as a protective barrier that inhibits infection with pathogens. African trypanosomes must cross tsetse’s PM in order to establish an infection in the fly, and PM struc…
Prassi teatrale e didattica inclusiva: una prospettiva di intervento formativo
2017
Il vistoso cambiamento di paradigma pedagogico, registrato negli ultimi anni in Italia, ha visto il passaggio dal concetto di integrazione al costrutto più complesso di inclusione, secondo cui non è richiesto tanto l’adattamento del soggetto disabile al contesto scolastico, bensì il contrario. Secondo Gardou (2015), la categoria di “accessibilità” costituisce l’assioma di ogni pratica inclusiva e includere equivale a rendere possibile a tutti l’accesso alla formazione, alla vita sociale, culturale e civile rispettando i bisogni particolari di ciascuno. A ciò si aggiunga che «[…] è doveroso e necessario capire come favorire le “integrazioni” nella classe […] ogni singolo ragazzo porta specif…
Survey of neonatal respiratory care and surfactant administration in very preterm infants in the Italian neonatal network
2013
INTRODUCTION: Variation of respiratory care is described between centers around the world. The Italian Neonatal Network (INN), as a national group of the Vermont-Oxford Network (VON) allows to perform a wide analysis of respiratory care in very low birth weight infants. METHODS: We analyzed the dataset of infants enrolled in the INN in 2009 and 2010 and, for surfactant administration only, from 2006 to 2010 from 83 participating centers. All definitions are those of the (VON). A questionnaire analysis was also performed with a questionnaire on centers practices. RESULTS: We report data for 8297 infants. Data on ventilator practices and outcomes are outlined. Variation for both practices and…