Search results for "CuO"
showing 10 items of 497 documents
L'educazione di genere nella scuola dell'infanzia: un percorso di autovalutazione riflessiva con le insegnanti tra Palermo e Curitiba
Cellular and Subcellular Localization of Peroxidase Isoenzymes in Plants and Cell Suspension Cultures from Lupinus polyphyllus
1989
Abstract , leaf protoplasts and cell suspension cultures of Lupinus polyphyllus and isolated vacuoles were studied for cellular and subcellular localization of peroxidase isoenzymes. Isoelectric focusing revealed 16 peroxidase isoenzymes. The basic peroxidase isoenzymes are predominantly localized in the vacuole and, to a minor degree, unbound in the intercellular space. The acidic isoenzymes are cell wall-bound in plants and not detectable in suspension-cultured cells. Large amounts (up to 11.0 U/ml) of a single basic isoenzyme are detectable in the spent medium of cell suspension cultures.
Follicle Cells of Styela plicata Eggs (Ascidiacea)
2001
Styela plicata eggs are surrounded by large follicle cells that at LM appear as highly vacuolated and columnar in shape; at the apical end of each cell lies a very large and clear vacuole, half of which extends inward. Electron microscope observations show a Single layer of largely spaced box-like follicle cells; the close cell-cell contact at their base is realized by interdigitations. The cell surface shows a peculiar structure, more developed in the latero-basal regions, consisting of a complex of membrane extensions, i.e. microvilli, filopodia and lamellipodia. Filopodia irradiate in all directions towards the adjacent cells and the outermost vitelline coat, thus creating a complex netw…
The Follicle Cells of Styela Plicata (Ascidiacea, Tunicata): A Sem Study
2000
The morphological aspect of the follicle cells of Styela plicata eggs is described by means of scanning electron microscope investigations. The follicular layer is made of spaced, cylindrical box-like cells which are arranged hexagonally. They adhere to the egg through a complex network of membrane extensions making an overall thin layer on the vitelline coat. The walls of the follicle cells are plentifully provided with microvilli, filopodia and lamellipodia, which allow a connection among the cells. At their apical end lies a large vacuole containing a granule, probably involved in secretion. At insemination the majority of spermatozoa is distributed on the apical membrane of the follicle…
Are Heme-Dependent Enzymes Always Using a Redox Mechanism? A Theoretical Study of the Kemp Elimination Catalyzed by a Promiscuous Aldoxime Dehydratase
2020
The design of biocatalysts is a goal to improve the rate, selectivity and environmental friendship of chemical processes in biotechnology. In this regard, the use of computational techniques has provided valuable assistance in the design of enzymes with remarkable catalytic activity. In this paper, hybrid QM/MM simulations have allowed getting an insight into the mechanism of a promiscuous aldoxime dehydratase (OxdA) for the Kemp elimination. We first demonstrate that, based on the use of linear response approximation (LRA) methods, the lowest energy electronic state of the benzisoxazole placed in the active sit of OxdA corresponds to a singlet state, being the triplet and the quintet state…
The Formation of The Plant Vacuolar System
1999
The plant vacuole is a multifunctional subcellular compartment. In general, the vacuolar system is constituted of a single or few vacuoles. About 80% of the volume of mature plant cells is occupied by vacuoles. These organelles are limited by a single membrane, the tonoplast. According to the cell type and to particular functions, the vacuolar content can vary from a homogeneous consistency to a heterogeneous matrix containing crystalloid structures (Boiler, Wiemken, 1986; Marty et al., 1980). From the biotechnological point of view, the endomembrane system of plants, particularly the ER and vacuoles, can be envisioned as the ultimate environment for stable protein accumulation. Several rep…
A barley (Hordeum vulgare L.) LEA3 protein, HVA1, is abundant in protein storage vacuoles
1996
The HVA1 protein belongs to the LEA3 group, which is expressed during the late stage of seed maturation. It is also induced by exogenous abscisic acid (ABA) and a variety of environmental stresses in germinating barley (Hordeum vulgare L.). In the present work, the potential role of HVA1 was investigated by studying its tissue distribution and subcellular localization in mature and stressed seeds by immuno-microscopic methods. In the mature seed, HVA1 protein was detected in all tissues except the non-living starchy endosperm. During germination the amount of HVA1 protein decreased but did not totally disappear. Incubation with 100 μM ABA, cold treatment or drought stress dramatically incre…
Niveles de trombopoyetina en humor acuoso de pacientes con uveítis anterior aguda no infecciosa
2015
Niveles de trombopoyetina en humor acuoso de pacientes con uveítis anterior aguda no infecciosa Introducción: Las uveítis anteriores agudas no infecciosas (UAANI) son idiopáticas, aunque ligadas a estímulos ambientales y genéticos. Están relacionadas con la respuesta inmune innata y adaptativa. Han sido aisladas citoquinas y factores de crecimiento celular (PEDF y VEGF) en el ojo y el suero de pacientes con uveítis. Los factores de crecimiento (FC) controlan el crecimiento y la diferenciación celular, la alteración del proceso de señalización mediado por FC está relacionado con muchas enfermedades inflamatorias. La trombopoyetina (TPO) es un FC sintetizado en hígado, regula la megacariopoye…
Flipped learning e gioia del lavoro ben fatto. Una ricerca con i futuri docenti di scuola primaria e dell'infanzia
2019
La formazione iniziale degli insegnanti richiede un approccio sistemico e modelli formativi per la promozione di interventi finalizzati a favorire negli studenti la consapevolezza del valore dello studio in un quadro orientato a favorire i risultati della formazione così come definiti dai Descrittori di Dublino e a sostenere l'apprendimento responsabile dello studente. La promozione della qualità della didattica universitaria ha come scopo fondamentale quello di garantire agli studenti un apprendimento significativo ed efficace. Initial teacher training requires a systemic approach and training models for the promotion of interventions aimed at encouraging students to evaluate the value of …
Prevenire l’insuccesso scolastico nella scuola secondaria di primo grado: scuola e territorio dialogano
2017
Con il lavoro di co-progettazione per la promozione di una rete integrata tra soggetti pubblici e privati attraverso lo sviluppo di una metodologia di sistema, l’ideazione e realizzazione di strumenti di supporto, è stato offerto un contributo per il contrasto del fenomeno della dispersione scolastica e per la prevenzione del rischio di marginalità sociale negli adolescenti di Palermo. Il progetto ha coinvolto 172 studenti, 171 genitori e 29 docenti di tre scuole secondarie di primo grado, 10 operatori del terzo settore del territorio del Comune di Palermo. Si è partiti dal presupposto che per favorire la dimensione orientativa della scuola media fosse necessario incentivare il dialogo tra …