4 research outputs found
International entrepreneurship in SMEs: a study of influencing factors in the textile industry
The final publication is available at Springer via http://dx.doi.org/10.1007/s11365-012-0242-3International entrepreneurship is an incipient research area with a rapidly increasing body of knowledge and contributions. An important part of this literature has focused on the analysis of the contributing factors to IE development. From these studies, this work attempts to analyse and validate through an integrative model the effect on this construct in SME of some of the main factors proposed by the literature such as Skills and Competences, Attitude and Proactiveness, Creativity and Innovation, Networking, Employees and Activity. To proceed with this aim, we conducted an empirical research focused on 174 textile SME in Spain. The results obtained confirm a positive relationship between the studied factors and the IE development. 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Criteria for efficient prevention of dissemination and successful eradication of Erwinia amylovora (the cause of fire blight) in Aragón, Spain
Erwinia amylovora was detected on pome fruits in the Aragón region (North-Eastern Spain), in a ca. 5 km radius area located in the mid Jalón river (mid Ebro Valley) in the province of Zaragoza, during 2000‒2003. Eight years have now passed since this pathogen was last detected, without new infections being reported in the same area. The bases for surveys and rapid eradication performed have been analyzed in detail to understand the reasons for the success in removing fireblight. The results demonstrate that intensive surveillance, risk assessment, plant analyses using accurate identification methods, and, especially, rapid total or selective eradication of infected trees in the plots have been very effective in preventing the generalized spread of fireblight and in delaying economic losses associated with this disease. Eradication and compensation to growers, estimated to cost approx. € 467,000, were clearly counterbalanced by the economic value of apple and pear production in the 2000‒2003 period (approx. € 368 million). Fire blight risk-assessment, using the MARYBLYT system, showed that climatic conditions in the studied area were favourable to infections during the analyzed period (1997‒2006). Molecular characterization of E. amylovora strains had revealed their homogeneity, suggesting that these fire blight episodes could have been caused by just one inoculum source, supporting the hypothesis that there was a unique introduction of E. amylovora in the studied area. Spatial spread of E. amylovora to trees was analyzed within six orchards, indicating an aggregated distribution model. This Spanish experience demonstrates the success of scientifically-based prevention methods that lead to the deployment of a fast and strict containment strategy, useful for other Mediterranean area
Combined synchronization and superovulation treatments negatively impact embryo viability possibly by the downregulation of WNT/beta-catenin and Notch signaling genes in the porcine endometrium
The combination of estrus synchronization and superovulation treatments introduces molecular modifications whose effects are yet to be disclosed. Here, reproductive parameters and gene expression changes in ovaries and endometrium were explored on day 6 after artificial insemination (AI), when synthetic progestin altrenogest (ALT) was combined with gonadotropins. Sows were administered ALT for 7 d beginning on the day of weaning and superovulated with equine chorionic gonadotropin (eCG) 24 h later and human chorionic gonadotropins (hCG) at the onset of estrus (SS-7 group; n = 6). The controls were either superovulated sows with eCG 24 h postweaning and hCG at the onset of estrus (SC group; n = 6) or sows with postweaning spontaneous estrus (NC group; n = 6). Ovary examination and embryo and tissue collection were performed in all sows via laparotomy on day 6 post-AI. RNA-Seq was conducted to analyze differentially expressed genes (DEGs) between groups. Statistical analysis of the reproductive parameters was conducted with ANOVA and Tukey post hoc tests. DEGs were analyzed with an ANOVA (fold changes &gt;= 2 or &lt;= 2, P value &lt;0.05). Hormonal treatments almost doubled (P &lt; 0.03) the number of corpora lutea (39.8 +/- 10.2 and 38.3 +/- 11.1 in SS-7 and SC sows, respectively) compared with that in the NC group (23.1 +/- 3.8). In contrast, embryo viability significantly decreased (P &lt; 0.003) in response to SS-7 treatment (75.1% +/- 15.2%) compared to SC and NC groups (93.8 +/- 7.6% and 91.8 +/- 6.9%, respectively). RNA-Seq analyses revealed 675 and 1,583 DEGs in the SS-7 group compared to both SC and NC groups in endometrial and ovarian samples, respectively. Interestingly, many genes with key roles in the Wnt/beta-catenin and Notch signaling pathways were differentially expressed in SS-7 sows relative to SC and NC groups (e.g., Ctnnb1, Myc, Gli3, Scyl2, Ccny, Daam1, Ppm1n, Rbpj, and Usp8). A key finding in this study was the downregulation of beta-catenin (Ctnnb1) gene expression in the SS-7 endometrium, suggesting that this treatment influences embryo-uterine dialogue by triggering a cascade of events leading to embryo maldevelopment. These data explain the proliferative defects in SS-7 embryos and suggest a novel mechanism of a porcine embryo-maternal crosstalk. Lay Summary Methods for porcine superovulation (increasing the number of ovulated oocytes per cycle) and estrus synchronization (grouping estrus sows on the same day) are available for assisted reproductive technologies, using hormonal treatments. The main goal of the present study was to understand how hormones used for these purposes influence gene expression patterns in the female reproductive tract (ovaries and endometrium). We observed that hormonal treatments (synchronization combined with superovulation) have the potential to alter ovarian and endometrial gene expression patterns, triggering improper follicle development and oocyte growth, and leading to abnormal embryonic development before implantation. Genes involved in two key metabolic pathways for embryo development (Wnt/beta-catenin and Notch signaling pathways) were dysregulated in reproductive tissues.Funding Agencies|Ministerio de Ciencia e Inovacion/Agencia Estatal de Investigacion/European Regional Development Fund [RTI2018-093525-B-I00]; Seneca Foundation [19892]; Swedish Research Council FORMAS Stockholm, Sweden [2019-00288]; European Unions Horizon 2020 research and innovation program under the MSCA [891663]</p