Search results for "Performance."
showing 10 items of 4178 documents
Derivatization of ephedrine with o-phthaldialdehyde for liquid chromatography after treatment with sodium hypochlorite.
2000
The usefulness of the reaction with NaClO followed by derivatization with o-phthaldialdehyde (OPA) and N-acetyl-L-cysteine (NAC) has been investigated for the chromatographic analysis of ephedrine. The influence of parameters affecting the two-stage reaction has been evaluated, including concentration of NaClO, time of reaction, temperature and pH. On the basis of these studies, conditions for the pre-column and (automated) post-column determination of ephedrine are presented. The described conditions have been applied to the measurement of ephedrine in the concentration intervals 0.2-20.0 microg/ml and 2.0-50.0 microg/ml for the pre-column and post-column methods, respectively. The possibi…
The Role of Equity Crowdfunding Campaigns in Shaping Firm Innovativeness: Evidence from Italy
2023
PurposeThis paper aims to contribute to the scientific debate concerning the impact of equity crowdfunding on the performance of crowdfunded firms after campaigning. To this aim, the purpose of this paper is to investigate the relationship between the characteristics of the campaign and the subsequent firm innovativeness.Design/methodology/approachThis study adopts a quantitative research approach to evaluate if the entrepreneurial choices affecting the characteristics of the equity crowdfunding campaigns have an impact on the post-campaign firm innovativeness.FindingsThe results of the models show that the campaign characteristics have a direct impact on the firm innovativeness, both in te…
Physico-chemical stability of eribulin mesylate containing concentrate and ready-to-administer solutions.
2013
Objectives The aim of this study was to determine the stability of commercially available eribulin mesylate containing injection solution as well as diluted ready-to-administer solutions stored under refrigeration or at room temperature. Methods Stability was studied by a novel developed stability-indicating reversed-phase high-performance liquid chromatography (RP-HPLC) assay with ultraviolet detection (detection wavelength 200 nm). Triplicate test solutions of eribulin mesylate containing injection concentrate (0.5 mg/mL) and with 0.9% sodium chloride solution diluted ready-to-administer preparations (0.205 mg/mL eribulin mesylate in polypropylene (PP) syringes, 0.020 mg/mL eribulin mesyl…
Relationship among Perceived Dynamism, Technological Posture and Innovation Performance
2014
A main strategic election for a firm is its technological posture, which can be understood as its propensity to innovate and the moment for the introduction of technological changes into the market. This paper, which focuses on the renewable energy industry in Spain, establishes that in environments in which dynamism is understood by managers as high, and the appreciation of change is greater, firms develop a greater tendency towards technological leadership postures (pioneer or first-mover strategy) rather than conservative or follower postures (last-mover strategy). The results of the analysis, carried out through a structural equation model based on the partial least squares (PLS) techni…
Self-efficacy in volleyball: What has been evaluated? A systematic review
2019
Self-efficacy in sport has been the object of study in different modalities, including volleyball. The aim of the present study was to verify, by means of a systematic review, what has been evaluated in volleyball self-efficacy studies. The APA, PsycInfo, Bireme, Eric, Science Direct, Pubmed and Scopus databases were used to carry out the search. After the search, the articles were selected using the inclusion and exclusion criteria, resulting in 7 articles. The results point to a lack of clarity in the instruments for assessing self-efficacy in volleyball, with regard to the technical, tactical, physical or psychological attributes they are designed to measure. Few articles have described …
Práctica deportiva extraescolar y su relación con el autoconcepto y el rendimiento académico
2018
La falta de actividad física en la sociedad es uno de los factores de riesgo más importantes para sufrir enfermedades y una de las causas de muerte más representativas. La sociedad propone alternativas, pero cada vez más sedentarias y es por ello que la práctica deportiva debe potenciarse para ayudar a tener una buena calidad de vida, mejorando a nivel físico, pero también a nivel de autoconcepto, rendimiento académico y a nivel social, por lo que es una buena herramienta para propiciar el desarrollo integral de las personas. En este estudio se ha analizado el autoconcepto, el rendimiento académico y la práctica deportiva extraescolar de los alumnos, con la intención de comprobar si el hech…
Crash modeling for urban roundabouts: a case study
2013
In many cities and towns, a large number of intersections are considered sites with promise for safety and operational improvements. Several studies have been carried out in many countries to establish relationships between crashes and flow and non-flow explanatory variables, using statistical tools to investigate factors critical to road safety. Starting from a brief review of existing information and analysis on the issue, this article summarizes the findings of an exploratory analysis aimed at modeling injury crashes for a sample of urban roundabouts. The methodological path followed in this research allowed to handle issues associated with the estimation of a safety performance function…
Efecto de un programa de intervención sobre el estrés percibido, autoestima y rendimiento en jóvenes pilotos de motociclismo de elite
2013
En la especialidad deportiva de motociclismo la literatura científica se ha centrado en aspectos tecnológicos, de seguridad, incluso patrones de lesiones, existiendo poca información sobre variables psicológicas de los deportistas. El objetivo de nuestro estudio fue evaluar si el efecto de una intervención en habilidades técnicas y condición física sobre la percepción de estrés, autoestima, la autovaloración, la valoración de otros, y finalmente la ejecución. La muestra estuvo compuesto por 27 pilotos jóvenes de élite, participantes del Red Bull Moto GP Rookies Cup, de los cuales 16 sujetos realizaron un programa de intervención (Grupo Experimental, GE), mientras que el resto fue el Grupo C…
Can We Buy Virtue? Implications from State University Funding On Musical Instrument Performance Teacher Mandate
2021
Recent world developments have put a strain on the humanities in general, and higher education music performance study degree-programmes in particular. In an educational system currently promoting consumer-product relationships where the music performance teacher is very much accountable for the students’ development into professional musicians and, recently, also sustainable world citizens, we must give more attention to what, whom and why we educate? This chapter is an armchair analytical philosophical continuation of a paper published elsewhere (Rolfhamre, 2020). Taking the lead from Julia Annas’ (2011) virtue-as-skill, I will, here, elaborate on what implications the Norwegian state hig…
The role of crystalline, mobile amorphous and rigid amorphous fractions in the performance of recycled poly (ethylene terephthalate) (PET)
2012
[EN] The action of thermo-mechanical degradation induced by mechanical recycling of poly(ethylene terephthalate) was simulated by successive injection moulding cycles. Degradation reactions provoked chain scissions and a reduction in molar mass mainly driven by the reduction of diethyleneglycol to ethylene glycol units in the flexible domain of the PET backbone, and the formation of -OH terminated species with shorter chain length. The consequent microstructural changes were quantified taking into account a three-fraction model involving crystalline, mobile amorphous (MAF) and rigid amorphous fractions (RAF). A remarkable increase of RAF, to a detriment of MAF was observed, while the percen…