Search results for "Lucan"
showing 10 items of 161 documents
Localized versus systemic effect of arbuscular mycorrhizal fungi on defence responses to Phytophthora infection in tomato plants
2002
Development of biological control for plant diseases is accepted as a durable and environmentally friendly alternative for agrochemicals. Arbuscular mycorrhizal fungi (AMF), which form symbiotic associations with root systems of most agricultural, horticultural and hardwood crop species, have been suggested as widespread potential bioprotective agents. In the present study the ability of two AMF (Glomus mosseae and Glomus intraradices) to induce local or systemic resistance to Phytophthora parasitica in tomato roots have been compared using a split root experimental system. Glomus mosseae was effective in reducing disease symptoms produced by P. parasitica infection, and evidence points to …
Il discorso sui 'metalla' fra ideologia, poetica e retorica. Da Cicerone a Prudenzio
2002
L'articolo mira a ricostruire, attraverso un percorso per sondaggi e campioni, l'ampio dibattito sviluppato dalla cultura latina intorno al tema dello sfruttamento delle risorse minerarie in un arco di tempo che va dalla tarda repubblica al V secolo d. C. Analizzando una serie di testi appartenenti ad epoche, generi ed autori diversi (Cicerone, Ovidio, Manilio, Seneca, Lucano, Silio Italico, Tiberiano, Prudenzio) si pone in luce la natura eminentemente etico-culturale, e assai spesso moralistica, dell'interesse mostrato dagli scrittori latini per questo tipo di tematiche. Al contempo, tuttavia, si segnala un significativo slittamento prospettico nelle varie fasi della storia culturale roman…
Chemiluminescence response of ß-glucan stimulated leukocytes isolated from different tissues and peritoneal cavity of Dicentrarchus labrax
2003
Abstract The respiratory burst of leukocytes isolated from sea bass ( Dicentrarchus labrax ) pronephros, peritoneal cavity (P.C.), spleen and blood, was measured by a chemiluminescence (CL) assay after stimulation with β-glucan. The CL response by P.C. and pronephros leukocytes was significantly higher than that expressed by a similar number of cells separated from spleen and blood. This probably reflects the observation that the proportion of macrophages and neutrophils was highest in the populations of leukocytes from peritoneal cavity and pronephros. Comparative observations showed a higher degree of yeast phagocytosis by leukocytes taken from peritoneal cavity than the pronephros. Moreo…
Investigation of a Killer Strain of Zygosaccharomyces Bailii
1993
Summary: The yeast Zygosaccharomyces bailii strain 412 was found to liberate a killer toxin (KT412) lethal to sensitive strains of Saccharomyces cerevisiae and Candida glabrata. Culture supernatants of the killer strain were concentrated by ultrafiltration and the extracellular protein was purified by gel filtration and ion-exchange chromatography. Gel filtration and SDS-PAGE of the electrophoretically homogeneous killer protein indicated an apparent molecular mass of 10 kDa. The killer toxin KT412 is probably not glycosylated since it did not show any detectable carbohydrate structures. KT412 was bound to sensitive but not to resistant yeast cells. The mannan, and not the glucan, fraction …
Role of Pir1 in the construction of the Candida albicans cell wall
2004
Searches in a Candida albicans database (http://genolist.pasteur.fr/CandidaDB/) identified two Individual Protein Files (IPF 15363 and 19968) whose deduced amino acid sequences showed 42 % and 45 % homology with Saccharomyces cerevisiae Pir4. The two DNA sequences are alleles of the same gene (CaPIR1) but IPF 19968 has a deletion of 117 bases. IPF 19968 encodes a putative polypeptide of 364 aa, which is highly O-glycosylated and has an N-mannosylated chain, four cysteine residues and seven repeats. Both alleles are expressed under different growth conditions and during wall construction by regenerating protoplasts. The heterozygous mutant cells are elongated, form clumps of several cells an…
Use of microbial enzyme on brewing
2015
Injectable hydrogel formulations to host adipose stem cell spheroids for stemness maintenance and bone and cartilage regeneration
2021
Adipose-derived mesenchymal stem cells (ASCs) represent a great promise for tissue regeneration as fat is a very abundant source of stem cells (1) and owing to their ability to self-renew and differentiate into specific tissue types (2). In general, they are usually cultured as two-dimensional (2D) adherent monolayers, not representative of the in vivo condition, often entailing lower cell viability and, more in general, a lower “cell quality” in terms of regenerative potential (3, 4). When ASCs are cultured in low adhesion flasks and with a suitable culture medium, they aggregate in the form of three-dimensional spheroids (SASCs). The incorporation of these spheroids into injectable, in-si…
Idrogeli a base di xiloglucano e k-carragene con sferoidi di cellule staminali adipose umane come scaffolds per la medicina rigenerativa
2019
Con l’obiettivo di sviluppare scaffold per la rigenerazione dei tessuti umani con sferoidi di cellule staminali adipose (S-ASC), questo lavoro indaga le proprietà degli idrogeli formati da dei polisaccaridi che subiscono transizioni sol-gel indotte dalla temperatura e le loro miscele: k-carragene (k-C) e xiloglucano parzialmente degalattosilato (Deg-XG). Gli idrogeli sono network polimerici idrofili rigonfiati dall'acqua. La morfologia e le proprietà meccaniche degli idrogeli sono fortemente influenzate dalla loro composizione, grado di reticolazione e di rigonfiamento. Quando sono progettati come scaffold, devono avere sufficiente integrità meccanica per fornire supporto alle cellule, dall…
GALACTOSE-DECORATED POLYMERIC CARRIERS FOR HEPATOCYTE-SELECTIVE DRUG TARGETING
2015
In this paper, the current available strategies to realize galactose-decorated nanostructured polymeric systems are summarized. These carriers are designed in order to obtain targeted drug delivery to hepatocytes via galactose (GAL) moieties, i.e., for the treatment of viral hepatitis or liver cancer that are the greater causes of global disability and mortality. Usually, the main followed strategy to obtain galactosylated polymeric carriers is to use galactosylated copolymers. The chemical modifications of preformed polymers with sugar-containing reagents is followed for obtaining lactosaminated human albumin, galactosylated phospholipid-polyaminoacid and polylactide (PLA)- polyaminoacid c…