Search results for "RACE"

Current and New Insights in the Sustainable and Green Recovery of Nutritionally Valuable Compounds from Stevia rebaudiana Bertoni.

2015

International audience; The South American plant Stevia rebaudiana Bertoni is a great source of noncaloric sweeteners (steviol glycosides), mainly concentrated in its leaves, but also has important antioxidant compounds (vitamin C, polyphenols, chlorophylls, and carotenoids) and other important macro- and micronutrients such as folic acid and all of the essential amino acids except tryptophan. Traditionally, conventional methods have been used to recover nutritionally valuable compounds from plant food matrices. However, nowadays, the need for obtaining greener, sustainable, and viable processes has led both food industries and food scientists to develop new processes in full correspondence…

A Concentric CSR Roadmap Model for Host Community Relations in the Global South

2014

The purpose of this article is to find new Corporate Social Responsibility (CSR) approaches for corporate-community relationships in the global South and hence to achieve some distance from the Northern ethos. The article is based on a case study from the Brazilian pulp and paper sector. Veracel Celulose, a multinational corporation, is a joint venture between the Brazilian Fibria Celulose (formerly Aracruz Celulose) and the Swedish-Finnish Stora Enso. First, Veracel’s production impacts on the Indigenous community, the Pataxó Indians, are examined. Second, Veracel’s CSR policy and its subsequent impact are brought under closer scrutiny by juxtaposing corporate words with corporate actions.…

Analysis of the polypeptide composition of the cell walls of Neurospora crassa. Similarities with the proteinaceous material secreted by the slime va…

1991

The polypeptide composition of cell walls from the wild-type strain of Neurospora crassa is compared with that of the proteinaceous extracellular coat (PEM) secreted by the slime strain of this fungus. Analyses included determination of the polypeptide pattern by polyacrylamide gel electrophoresis and blotting followed by staining with Concanavalin A and antibodies raised against the overall antigenic components present in either (whole cell walls or PEM) structure. A complex protein assortment was found associated to the walls of the wild type strain. The similarities observed between the polypeptide patterns of the cell walls and PEM, in addition to the immunological cross-reactivity exhi…

Strategie di difesa in risposta a stress in embrioni di riccio di mare: L'embrione di riccio di Paracentrotus lividus come modello sperimentale per l…

2013

Negli ultimi decenni, grazie alle nuove tecnologie e alla maggiore disponibilità di strumenti di ricerca, il campo riguardante lo studio delle strategie di difesa attivate nella risposta a stress, compresi i meccanismi di apoptosi e autofagia, è divenuto molto ampio ed è in continua espansione. Sin dagli albori della Biologia, gli studi condotti sul modello sperimentale di riccio di mare hanno permesso di ottenere conoscenze di base, spesso applicabili ad altri modelli biologici. I dati riportati nel presente libro dovrebbero aiutare a far luce sui meccanismi di difesa che le cellule sono in grado di attivare, in caso di necessità, se esposte a sfavorevoli condizioni ambientali. Le osservaz…

Mutation of a critical tryptophan to lysine in avidin or streptavidin may explain why sea urchin fibropellin adopts an avidin-like domain

1999

Sea urchin fibropellins are epidermal growth factor homologues that harbor a C-terminal domain, similar in sequence to hen egg-white avidin and bacterial streptavidin. The fibropellin sequence was used as a conceptual template for mutation of designated conserved tryptophan residues in the biotin-binding sites of the tetrameric proteins, avidin and streptavidin. Three different mutations of avidin, Trp-110-Lys, Trp-70-Arg and the double mutant, were expressed in a baculovirus-infected insect cell system. A mutant of streptavidin, Trp-120-Lys, was similarly expressed. The homologous tryptophan to lysine (W--K) mutations of avidin and streptavidin were both capable of binding biotin and bioti…

Metabolism and Lysine Biosynthesis Control in Brevibacterium Flavum: Impact of Stringent Response in Bacterial Cells

2005

Parameters affecting lysine biosynthesis by Brevibacterium flavum RC 115 cells under stringent response conditions (test guanosine 5′-diphosphate 3′-diphosphate accumulation in cells) caused by threonine limitation were investigated. Experimental results confirmed that an increase in lysine biosynthesis by this bacterium under stringent response conditions might be a result of an increase in the intracellular concentration of NADPH as well as lysine export activity.

Poly(γ-Glutamic Acid) as an Exogenous Promoter of Chondrogenic Differentiation of Human Mesenchymal Stem/Stromal Cells

2015

Cartilage damage and/or aging effects can cause constant pain, which limits the patient's quality of life. Although different strategies have been proposed to enhance the limited regenerative capacity of cartilage tissue, the full production of native and functional cartilaginous extracellular matrix (ECM) has not yet been achieved. Poly(γ-glutamic acid) (γ-PGA), a naturally occurring polyamino acid, biodegradable into glutamate residues, has been explored for tissue regeneration. In this work, γ-PGA's ability to support the production of cartilaginous ECM by human bone marrow mesenchymal stem/stromal cells (MSCs) and nasal chondrocytes (NCs) was investigated. MSC and NC pellets were cultur…

Reproducibility of trace element time-series (Na/Ca, Mg/Ca, Mn/Ca, Sr/Ca, and Ba/Ca) within and between specimens of the bivalve Arctica islandica – …

2017

Abstract Trace element time-series in bivalve mollusk shells and other (biogenic) materials can potentially serve as environmental proxies. Yet, the applicability of element-to-calcium ratios is often challenging, because non-environmental factors such as vital effects distort or mask environmental signals. If a trace element time-series is driven by an environmental factor, it should be reproducible within and between coeval specimens of the same species. In the present study, we tested whether time-series of trace element-to-calcium ratios can be reproduced within and between coeval specimens of the bivalve Arctica islandica and thus whether an external signal is encoded in the temporal v…

A trace element perspective on Archean crust formation and on the presence or absence of Archean subduction

2008

Voice and authorial body in Juana Manso

2021

El estilo de Juana Manso fue calificado por Sarmiento como «escandaloso». Esa manera inequívoca de presentarse públicamente delimitó desde entonces un modo de existencia, de circulación y de funcionamiento de su figura autorial en el campo cultural argentino de mediados de siglo XIX. Este artículo se propone rastrear esta singular «puesta en escena» de la escritora como un dispositivo de enunciación que no se limita a sus textos, en la doble dimensión que ocupa, como autora y como actora de ese campo. ¿Cómo se construye, en esta puesta escena, su voz y su imagen?, ¿Cómo se difunde ese cuerpo de autora? En la conjunción de género y profesión, la función-Manso se concreta en un tono de escrit…