Search results for "SAC"

Evaluation of yeasts from Ecuadorian chicha by their performance as starters for alcoholic fermentations in the food industry

2020

Yeasts involved in the spontaneous fermentation of traditional beverages like chicha (indigenous Andean beer) may have the potential to be used as starter cultures to improve the quality and microbiological safety of these products, but also as non-conventional alternatives to other food alcoholic fermentations. In this research, we isolated, identified and characterised yeast strains from four Ecuadorian chichas made by using four different raw materials: rice (RC), oat (OC), grape (GC) and a mixture of seven corn varieties (yamor, YC). Finally, 254 yeast isolates were obtained and identified by molecular methods. Eleven yeast genera and 16 yeast species were identified with relatively few…

Spacer-separated sialyl LewisX cyclopeptide conjugates as potential E-selectin ligands.

2006

Completely protected sialyl LewisX azide was synthesized from a neolactosamine azide precursor carrying a 3-O-allyloxycarbonyl group as the temporary protecting group. After its Pd(0)-catalyzed deprotection and stereoselective alpha-fucosylation, the obtained LewisX azide was subjected to O-deacetylation in the galactose unit and subsequent regio- and stereoselective sialylation. Reduction of the anomeric azido group afforded the sialyl LewisX amine building block. Two molecules of this tetrasaccharide ligand were conjugated to a preformed cyclooctapeptide containing two equidistant l-asparagine units equipped with carboxy-terminated tetraethyleneglycol side chains to give, after deprotecti…

Glycosyl azides as building blocks in convergent syntheses of oligomeric lactosamine and Lewisx saccharides

1997

Abstract Oligosaccharides containing type 2 lactosamine repeating units, e.g. neo-lacto-octaose and trimeric Lewis x derivatives, are constructed using neo-lactosamine azide building blocks. The azido group provides a favorable protection of the anomeric position which is stable to versatile protecting group manipulations and glycosylation reactions. On the other hand, glycosyl azides can be converted into glycosyl fluorides via a 1,3-dipolar cycloaddition with di- tert -butyl-acetylenedicar☐ylate and subsequent treatment of the resulting N -glycosyl triazoles with hydrogen fluoride-pyridine complex. Activation of the lactosamine fluorides with Lewis acids affords the possibility to extend …

Systematic review and mixed treatment comparison meta-analysis of randomized clinical trials of primary oral antifungal prophylaxis in allogeneic hem…

2014

Background Antifungal prophylaxis is a promising strategy for reducing invasive fungal infections (IFIs) in allogeneic hematopoietic cell transplant (alloHCT) recipients, but the optimum prophylactic agent is unknown. We used mixed treatment comparison (MTC) meta-analysis to compare clinical trials examining the use of oral antifungals for prophylaxis in alloHCT recipients, with the goal of informing medical decision-making. Methods Randomized controlled trials (RCTs) of fluconazole, itraconazole, posaconazole, and voriconazole for primary antifungal prophylaxis were identified through a systematic literature review. Outcomes of interest (incidence of IFI/invasive aspergillosis/invasive can…

Nosacījuma palīgteikumi Britu nacionālā korpusa tirdzniecības sadaļā

2015

Bakalaura darbā tiek pētīti nosacjuma palīgteikumi Britu Nacionālā Korpusa tirzdniecības sadaļā. Pastāv dažādu veidu nosacījuma palīgteikumi, un to lietošanas nolūks atšķiras. Tie tiek izmantoti dažādās jomās: gan ikdienas komunikācijā, gan biznesa, gan tirzdniecības jomās. Nosacījuma palīgteikumus angļu valodā izmanto, lai izteiktu vispārīgus faktus un īstus vai neīstus notikumus. Darba mērķis ir izpētīt nosacījuma palīgteikumus Britu Nacionālā Korpusa tirzdniecības sadaļā, lai noskaidrotu, kādu funkciju tie pilda teikumos. Pētījuma darba metode ir kvantitatīva un kvalitatīva uz korpusu balstīta nosacījuma palīgteikumu analīze, izmantojot konkordances metodi. Pētījuma rezultāti attēlo visb…

Cotoneaster Majoricensis L. Sáez & Rosselló (Rosaceae), a New Species from Majorca (Balearic Islands, Spain)

2012

Abstract Saez, L. & J. A. Rossello (2012). Cotoneaster majoricensis L. Saez & Rossello (Rosaceae), a new species from Majorca (Balearic Islands, Spain). Candollea 67: 243–253. In English, English and French abstracts. A new species from the northern mountains of Mallorca (Balearic Islands), Cotoneaster majoricensis L. Saez & Rossello (Rosaceae), is described and illustrated. It belongs to section Cotoneaster Medik. and is morphologically close to Cotoneaster tomentosus (Aiton) Lindl. and Cotoneaster raboutensis K. E. Flink & al., differing however by various morphological characters. Data on taxonomic relationships, ecology, and conservation status of this new apparently narrow-ranged endem…

Bomberos pirómanos / 2

2008

Overexpression of a cell wall enzyme reduces xyloglucan depolymerization and softening of transgenic tomato fruits.

2010

Xyloglucan xyloglucosyltransferase/endohydrolase (XTHs: EC 2.4.1.207 and/or EC 3.2.1.151) has been proposed to have a dual role integrating newly secreted xyloglucan chains into an existing wall-bound xyloglucan and restructuring existing cell wall material by catalyzing transglucosylation between previously wall bound xyloglucan molecules. In this work we generated transgenic tomatoes with altered levels of an XTH gene. These transgenic fruits showed significant overexpression of the XTH proteins in comparison with the wild type. Specific XET activity was approximately 4.33 fold higher in the transgenic fruits compared with the wild type fruits, although in both cases the activity decrease…

Cloning and characterization of the phenylalanyl-tRNA synthetase β subunit gene fromCandida albicans

1998

A Candida albicans expression library was constructed from RNA isolated from regenerating protoplasts. A 1.4-kb cDNA clone was used to isolate a genomic fragment. Sequence analysis revealed an open reading frame of 593 amino acids with an overall identity of 63.6% with the phenylalanyl-tRNA synthetase beta subunit (FRS1) of Saccharomyces cerevisiae. We named it CaFRS1. It is located in a single copy in chromosome R, SfiI fragment M. Its expression showed a decrease during the cell wall regeneration process in protoplasts of both yeast and mycelial cells of C. albicans, suggesting its requirement thereof in initial steps of the cell wall synthesis.

Technological screening and application of Saccharomyces cerevisiae strains isolated from fermented honey by-products for the sensory improvement of …

2021

“Spiritu re fascitrari” is a Sicilian alcoholic beverage obtained through distillation of a decoction of spontaneously fermented honey by-products (FHP). The production process often leads to sensorial defects due to the unstable alcoholic fermentation. The objective of this work was to select Saccharomyces cerevisiae strains from FHP to be used as starter in decoction fermentation. Based on chemical, microbiological and technological data, from a total of 91 strains three S. cerevisae were selected for further testing to produce FHP at laboratory scale level. After FHP distillation, the analysis of volatile organic compounds showed a complex mixture of sensory active molecules, mainly alco…