1,721,189 research outputs found
Comparative reactivities of phosphate ester cleavages by metallomicelles (vol 12, pg 6235, 1996)
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Design of a Synthetic Receptor for the Calmodulin-Binding Domain of Calcineurin
No full textThese paper reports the design of a helical hairpin peptide that binds specifically to the CaM-binding domain of calcineurin, a phosphatase involved in a number of signal transduction schemes
Psycho-physical conditions and hormonal secretion of nurses on a rapidly rotating shift schedule and exposed to bright light during night work
No full textThe psychophysical conditions of 15 young female nurses, working in a rapidly-rotating shift system (2-2-2-2), modified according to some psychophysiological criteria, and exposed to short periods (4 x 20 min) of bright light (2350 Lux) during their night duty, were studied in order to evaluate their adaptation to night work and to test a possible positive effect on it of bright light. Subjective evaluations of work load and psychophysical conditions, performance measures, hormonal excretion (cortisol, 6-sulphatoxymelatonin and catecholamines), oral temperature and activity-sleep logs were taken during the shiftwork cycle, comprising one morning, one afternoon and two consecutive nights under normal and bright light. The results showed that this rapidly-rotating shift system had little effect upon the normal circadian rhythms of the body. Moreover, the lengthening of the night shift to 10 h can be considered to be acceptable, provided that work load is reduced and there are sufficient rest pauses available. On the other hand, the reduction to 7 h of the length of the day shifts and delayed start of the morning shift to 07:00 h appeared to be convenient both in relation to the work load and sleep duration. Some positive effects of bright light upon psychophysical conditions and performance efficiency were noted, while hormonal excretion and body temperature did not show any effect of bright light; in particular, melatonin excretion was not suppressed appreciably by the bright light used
Influence of aggregation on redox potentials of amphiphilic Cu(II) complexes modeled after bleomycin antibiotics
No full textPsychophysical conditions and hormonal secretion in nurses on a rapidly rotating shift schedule and exposed to bright light during night work
No full textInvestigated the effect of rapidly-rotating shift schedules and bright light exposure on psychophysical conditions and hormonal secretion with 15 nurses. Ss completed performance measures, hormonal excretion, oral temperature and activity-sleep logs during the shiftwork cycle. Results show that the rapidly-rotating shift system had little effect upon normal circadian rhythms. Lengthening of the night shift to 10 hrs was acceptable, provided that work load was reduced and there were rest pauses available. Day shift reduction to 7 hrs and delayed start of the morning shift seemed convenient in relation to work load and sleep duration. Positive effects of bright light on psychophysical conditions and performance efficiency were noted, while hormonal excretion and body temperature showed no effect of bright light. (PsycLIT Database Copyright 1997 American Psychological Assn, all rights reserved
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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