Search results for "amine"

The ground electronic state of KCs studied by Fourier transform spectroscopy

2008

We present here the first analysis of laser induced fluorescence (LIF) of the KCs molecule obtaining highly accurate data and perform a direct potential construction for the X (1)Sigma(+) ground state in a wide range of internuclear distances. KCs molecules were produced by heating a mixture of K and Cs metals in a heat pipe at a temperature of about 270 degrees C. KCs fluorescence was induced by different laser sources: the 454.5, 457.9, 465.8, and 472.7 nm lines of an Ar(+) laser, a dye laser with Rhodamine 6G dye (excitation at around 16 870 cm(-1)), and 850 and 980 nm diode lasers (11 500-11 900 and 10 200-10 450 cm(-1) tuning ranges, respectively). The LIF to the ground state was recor…

Micellization properties of cardanol as a renewable co-surfactant

2015

With the aim to improve the features of surfactant solutions in terms of sustainability and renewability we propose the use of hydrogenated natural and sustainable plant-derived cardanol as an additive to com- mercial surfactants. In the present study we demonstrated that its addition, in amounts as high as 10%, to commercial surfactants of different charge does not significantly affect surfactant properties. Conversely, the presence of hydrogenated cardanol can strongly affect spectrophotometric determination of CMC if preferential interactions with the dyes used take place. This latter evidence may be profitably exploited in surfactant manufacturing by considering that the concurrent pres…

Both Short- and Long-Acting D-1/D-2 Dopamine Agonists Induce Less Dyskinesia than l-DOPA in the MPTP-Lesioned Common Marmoset (Callithrix jacchus)

2002

Abstract The current concept of dyskinesia is that pulsatile stimulation of D-1 or D-2 receptors by l -DOPA or short-acting dopamine agonists is more likely to induce dyskinesia compared to long-acting drugs producing more continuous receptor stimulation. We now investigate the ability of two mixed D-1/D-2 agonists, namely pergolide (long-acting) and apomorphine (short-acting), to induce dyskinesia in drug-naive MPTP-lesioned primates, compared to l -DOPA. Adult common marmosets ( Callithrix jacchus ) were lesioned with MPTP (2 mg/kg/day sc for 5 days) and subsequently treated with equieffective antiparkinsonian doses of l -DOPA, apomorphine, or pergolide for 28 days. l -DOPA, apomorphine, …

Land area fractions and population fractions exposed to extreme climate impact events derived from ISIMIP2b output data

2020

This dataset contains the land area fractions and population fractions exposed ('le' for land exposed and 'pe' for population exposed) to the following six extreme climate impact events: crop failures (lec/pec), drought (led/ped), heatwaves (leh/peh), river floods (ler/per), tropical cyclones (let/pet) and wildfire (lew/pew). It is the data behind Lange et al., 2020. The data are provided on a global 0.5° grid and in annual time steps. It was derived from multi-model climate impacts simulations generated within the second round (ISIMIP2b, https://www.isimip.org/protocol/2b, Frieler et al., 2017) of the Intersectoral Impact Model Intercomparison Project (ISIMIP, https://www.isimip.org). The …

Feature selection for distance-based regression: An umbrella review and a one-shot wrapper

2023

Feature selection (FS) may improve the performance, cost-efficiency, and understandability of supervised machine learning models. In this paper, FS for the recently introduced distance-based supervised machine learning model is considered for regression problems. The study is contextualized by first providing an umbrella review (review of reviews) of recent development in the research field. We then propose a saliency-based one-shot wrapper algorithm for FS, which is called MAS-FS. The algorithm is compared with a set of other popular FS algorithms, using a versatile set of simulated and benchmark datasets. Finally, experimental results underline the usefulness of FS for regression, confirm…

Changes in the contractility of colon from hypoxanthine-guanine phosphoribosyltransferase (HPRT) knockout mice (Lesch-Nyhan disease)

2009

Perspectives on Leadership in Early Childhood Education and Care Centers Through Community of Practice

2021

This article investigates early childhood education and care (ECEC) leadership through the concept of community of practice (COP). The focus is on ECEC leaders’ perceptions regarding their leadership during the educational changes taking place in the context of Finnish ECEC. The purpose is to increase understanding of how leaders see themselves in relation to the ECEC multi professional working community and practices of distributed leadership. The data are five focus group interviews of ECEC leaders analyzed with directed content analysis within the theoretical frame of domain, practice, and community forming the core of COP in Lave and Wenger. The results show how all three COP component…

Views from the Inside: Roles of Deputy Directors in Early Childhood Education in Finland

2021

This study explored the perceptions of deputy directors about their leadership in Early Childhood Education (ECE) centres in Finland. Our aim was to look beyond task distribution and understand how deputy directors enacted leadership with their colleagues. Six deputy directors employed in one municipality in Finland participated in this study. Interviewed individually, the participants discussed how they themselves perceived being in a leadership position and what their leadership looked like in practice. The emphasis they placed on the various relationships highlight the importance of paying attention to the relational dynamics amongst staff within a centre, taking into account both formal…

Voices heard and lessons learnt : Exploring multiple knowledges and local participation in a community-based integrated early childhood development p…

2019

Abstract Following calls for diverse and contextual perspectives of the rich lives of young children, their families and communities from/in the Global South, this paper presents critical reflections emerging from a three-year (2016-2019) communitybased Integrated Approach to Early Childhood Development (ECD) project implemented in the rural Eastern Cape Province, South Africa. It explores the critical relationship established between a range of stakeholders involved in this project as reflected on by two community activists working together in the area of early childhood in the province for thirty years. This article highlights the importance of situating any community development initiati…

Sapotrophical development of fusarium graminearum : respective role of different natural habitats of the fungus in the wheat infectious process in Bu…

2012

Fusarium Head Blight (FHB), mainly caused by the fungal species Fusarium graminearum, is one of the most important disease altering wheat crops in Burgundy. Moreover the plant-pathogen interaction leads to the production of mycotoxins potentially toxic for humans and animals.The only alternative to date to prevent the development of the disease is to control the saprotrophic development of F. graminearum in its natural habitat, i.e. weeds, soil and crops residues. Due to the trend of reduced tillage, special attention should be paid to the role of crop residues in the survival and development of F. graminearum.Two approaches were chosen to better understand the saprotrophic development of F…