550 research outputs found
Maximizing stakeholders' interests: An empirical analysis of the stakeholder approach to corporate governance
The purpose of this paper is to build on the emerging stakeholder model of corporate governance by analyzing the CSR function at board level, board diversity, and stakeholder engagement, and how it relates to financial performance. Based on an empirical study of an international sample of large companies, we find board responsibility for CSR to be a key factor in promoting engagement with primary and secondary stakeholders of the firm. Depending on the legal tradition of the country in which the company is based, we find evidence that board diversity and stakeholder engagement are positively correlated with firm financial performance.Corporate governance; corporate social responsibility; board diversity; stakeholder engagement; firm performance;
An optimization of the work disruption by 3D cavity mapping using GPR: A new sewerage Project in Torrente (Valencia, Spain)
[EN] This paper describes the inspection for cavity detection in an urban area in Torrente (Valencia, Spain). A shallow cave was found during the excavation work for a new sewerage project. Digging activities were stopped immediately and a GPR survey (400 MHZ antenna) was required to reorganise the sewerage planning. The 3D GPR-mapping pinpointed most of the detected cavities on one side of the street. As a result, the sewerage system layout was moved to the side of the street where less evidence of cavities was detected. Therefore, GPR technique is a helpful tool for minimizing costs, time, work safety risks and inconveniences to people living in the neighbourhood during civl engineering works, especially in urbanised areas.Garcia-Garcia, F.; Valls-Ayuso, A.; Benlloch Marco, J.; Valcuende Payá, MO. (2017). An optimization of the work disruption by 3D cavity mapping using GPR: A new sewerage Project in Torrente (Valencia, Spain). Construction and Building Materials. 154:1226-1233. doi:10.1016/j.conbuildmat.2017.06.116S1226123315
Identification Of Mitotically Competent SOX2+ Cells In White Matter Of Normal Human Adult Brain
SOX2 expression is linked to the undifferentiated state of stem cells in mammalian neurogenic niches. While its expression has been reported in the adult human subventricular zone (SVZ), to date it has not been detected in adult human white matter. Here we describe a population of SOX2+ cells from the white matter of the adult human temporal lobe, which proliferate and express glial markers in vitro
Recommended from our members
Proteins Encoded by the gerP Operon Are Localized to the Inner Coat in Bacillus cereus Spores and Are Dependent on GerPA and SafA for Assembly.
The germination of Bacillus spores is triggered by certain amino acids and sugar molecules which permeate the outermost layers of the spore to interact with receptor complexes that reside in the inner membrane. Previous studies have shown that mutations in the hexacistronic gerP locus reduce the rate of spore germination, with experimental evidence indicating that the defect stems from reduced permeability of the spore coat to germinant molecules. Here, we use the ellipsoid localization microscopy technique to reveal that all six Bacillus cereus GerP proteins share proximity with cortex-lytic enzymes within the inner coat. We also reveal that the GerPA protein alone can localize in the absence of all other GerP proteins and that it has an essential role for the localization of all other GerP proteins within the spore. Its essential role is also demonstrated to be dependent on SafA, but not CotE, for localization, which is consistent with an inner coat location. GerP-null spores are shown also to have reduced permeability to fluorescently labeled dextran molecules compared to wild-type spores. Overall, the results support the hypothesis that the GerP proteins have a structural role within the spore associated with coat permeability.IMPORTANCE The bacterial spore coat comprises a multilayered proteinaceous structure that influences the distribution, survival, and germination properties of spores in the environment. The results from the current study are significant since they increase our understanding of coat assembly and architecture while adding detail to existing models of germination. We demonstrate also that the ellipsoid localization microscopy (ELM) image analysis technique can be used as a novel tool to provide direct quantitative measurements of spore coat permeability. Progress in all of these areas should ultimately facilitate improved methods of spore control in a range of industrial, health care, and environmental sectors.1. Engineering and Physical Sciences Research Council Centre for Doctoral Training in Sensor Technologies and Applications (EP/L015889/1)
2. Cambridge Nehru Scholarship
3. Raymond and Beverly Sackler Foundation
4. MedImmun
Evaluation of different postharvest conditions to preserve the amount of bioactive compounds, physicochemical quality parameters and sensory attributes of ‘Sweetheart’ cherries.
Sweet cherries (Prunus avium L.) ‘Sweetheart’ were harvested at different production regions from Portugal (Cova da Beira and Portalegre) and Spain (Valle de Jerte). Cherries were harvested at their commercial maturation according to the empirical knowledge of external color corresponding to good quality. Fruits were stored and evaluated in order to study their quality on the harvest day and during a period of 21 days, at cold storage (1 ºC, 95% RH). The sweet cherry ‘Sweetheart’ is a well-known variety and a highly appreciated one but fruits present a short shelf life. On the other hand the effect of different “terroir” on cherry characteristics should be known and clarified. Fruits from day 0, considered without storage, were kept at 20ºC and analyzed. Every weak, 3 replicas were randomly picked up and 10 fruits from each one were submitted to several analyses after fruit temperature stabilized at 20ºC. Several quality parameters were evaluated: external colour (L*, a*, b*), texture, soluble solids content (SSC), titratable acidity (TA) and the ratio between soluble solid contents (SSC) and tritratable acidity (TA). Fruits from different orchards and locations were significantly different according to these parameters. Fruits from Cova da Beira were less firm comparing with other two regions, Valle de Jerte and Portalegre, which may indicate a higher maturation rate at harvest in those fruits. This is in accordance with SSC/titratable acidity rate suggesting a late harvest in Cova da Beira comparing with other two orchards, however fruits from Cova da Beira exhibit a poor color at harvest. These results clearly showed a lower correlation between SSC and firmness considering fruits origin
Dynamic regulation of serum aryl hydrocarbon receptor agonists in MS
Objective: Several factors influence the clinical course of autoimmune inflammatory diseases
such as MS and inflammatory bowel disease. Only recently, the complex interaction between
the gut microbiome, dietary factors, and metabolism has started to be appreciated with regard
to its potential to modulate acute and chronic inflammation. One of the molecular sensors that
mediates the effects of these environmental signals on the immune response is the aryl hydrocarbon receptor (AHR), a ligand-activated transcription factor with key functions in immune cells.
Methods: In this study, we analyzed the levels of AHR agonists in serum samples from patients
with MS and healthy controls in a case-control study.
Results: We detected a global decrease of circulating AHR agonists in relapsing-remitting MS patients as compared to controls. However, during acute CNS inflammation in clinically isolated syndrome or active MS, we measured increased AHR agonistic activity. Moreover, AHR ligand levels
in patients with benign MS with relatively mild clinical impairment despite longstanding disease
were unaltered as compared to healthy controls.
Conclusions: Collectively, these data suggest that AHR agonists in serum are dynamically modulated during the course of MS. These findings may guide the development of biomarkers to monitor disease activity as well as the design of novel therapeutic interventions for MSInstituto de Salud Carlos III, Unión Europea PT13/0010/004
Suppressor of fused associates with dissemination patterns in patients with glioma
Gliomas are the most common brain tumors, which present poor prognosis, due, in part, to tumor cell migration and infiltration into distant brain areas. However, the underlying mechanisms causing such effects are unknown. Hedgehog (HH)-Gli axis is one of the signaling pathways involved, with a high number of molecular mediators. In this study, we investigated the association between HH-Gli intermediates and clinical parameters. We found that high levels of SuFu are associated with high dissemination patterns in patients with glioma. Therefore, we analyzed SuFu expression data in three glioma cohorts of surgical samples (N =1,759) and modified its expression in Glioblastoma Cancer Stem Cells (GB CSC) in vitro models. Our data reveal that SuFu overexpression increases cancer stemness properties together with a migratory phenotype. This work identifies SuFu as a new molecular player in glioma cell migration and a promising target to develop blocking agents to decrease GB dissemination.This research was funded by grants from the "Proyectos de Investigación en Salud" (PI21/01353) and La Universidad Francisco de Vitoria-Banco Santander (UFV2021-23).S
The compositionally distinct cyanobacterial biocrusts from brazilian savanna and their environmental drivers of community diversity
Machado de Lima, Náthali Maria. São Paulo State University (UNESP). Microbiology Graduation Program. Department of Zoology and Botany. São Paulo, Brazil.Cámara Fernandes, Vanessa Moreira. Arizona State University. Center for Fundamental and Applied Microbiomics. Biodesign Institute. Tempe, Arizona, United States.Roush, Daniel. Arizona State University. Center for Fundamental and Applied Microbiomics. Biodesign Institute. Tempe, Arizona, United States.Velasco Ayuso, Sergio. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.Rigonato, Janaina. University of São Paulo (USP). Center for Nuclear Energy in Agriculture (CENA). Piracicaba, Brazil.Garcia Pichel, Ferran. Arizona State University. Center for Fundamental and Applied Microbiomics. Biodesign Institute. Tempe, Arizona, United States.Zanini Branco, Luis Henrique. São Paulo State University (UNESP). Microbiology Graduation Program. Department of Zoology and Botany. São Paulo, Brazil.10The last decade was marked by efforts to define and identify the main cyanobacterial players in biological crusts around the world. However, not much is known about biocrusts in Brazil’s tropical savanna (cerrado), despite the existence of environments favorable to their development and ecological relevance. We examined the community composition of cyanobacteria in biocrusts from six sites distributed in the Southeast of the country using high throughput sequencing of 16S rRNA and phylogenetic placement in the wider context of biocrusts from deserts. Sequences ascribable to 22 genera of cyanobacteria were identified. Although a significant proportion of sequences did not match those of known cyanobacteria, several clades of Leptolyngbya and Porphyrosiphon were found to be the most abundant. We identified significant differences in dominance and overall composition among the cerrado sites, much larger than within-site variability. The composition of cerrado cyanobacterial communities was distinct from those known in biocrusts from North American deserts. Among several environmental drivers considered, the opposing trend of annual precipitation and mean annual temperature best explained the variability in community composition within Brazilian biocrusts. Their compositional uniqueness speaks of the need for dedicated efforts to study the ecophysiology of tropical savanna biocrust and their roles in ecosystem function for management and preservation
Beyond the Warburg Effect: Oxidative and Glycolytic Phenotypes Coexist within the Metabolic Heterogeneity of Glioblastoma.
Glioblastoma (GBM) is the most aggressive primary brain tumor, with a median survival at diagnosis of 16–20 months. Metabolism represents a new attractive therapeutic target; however, due to high intratumoral heterogeneity, the application of metabolic drugs in GBM is challenging. We characterized the basal bioenergetic metabolism and antiproliferative potential of metformin (MF), dichloroacetate (DCA), sodium oxamate (SOD) and diazo-5-oxo-L-norleucine (DON) in three distinct glioma stem cells (GSCs) (GBM18, GBM27, GBM38), as well as U87MG. GBM27, a highly oxidative cell line, was the most resistant to all treatments, except DON. GBM18 and GBM38, Warburg-like GSCs, were sensitive to MF and DCA, respectively. Resistance to DON was not correlated with basal metabolic phenotypes. In combinatory experiments, radiomimetic bleomycin exhibited therapeutically relevant synergistic effects with MF, DCA and DON in GBM27 and DON in all other cell lines. MF and DCA shifted the metabolism of treated cells towards glycolysis or oxidation, respectively. DON consistently decreased total ATP production. Our study highlights the need for a better characterization of GBM from a metabolic perspective. Metabolic therapy should focus on both glycolytic and oxidative subpopulations of GSCs.post-print3439 K
- …