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The seasonal variation of the hydrolytic activities acid and alkaline phosphatase, α-glucosidase and protease, was studied in both the aerated and anoxic phases of a full-scale membrane bioreactor (MBR) (total operational volume = 28.2 m(3)), operated in pre-denitrification mode and fed real urban wastewater. Non-metric multidimensional scaling (MDS) and(More)
Although educational experts recommend the use of formative assessment, there is a dearth of empirical studies on its impact on academic achievement. In this research the authors analyse to what extent participation and performance in formative assessment are associated with positive academic outcomes of pre-graduate students of health sciences. A total of(More)
In 1994, Madoni created the Sludge Biotic Index (SBI) based on the presence and abundance of certain key protozoan groups. The use of this index has become increasingly common in wastewater treatment plant control and its applicability has been demonstrated. In this study, we applied the SBI index to a pilot-scale membrane bioreactor equipped with(More)
INTRODUCTION The huge influx of women into medicine may modify discriminatory attitudes towards health professionals. The aim of this study was to confirm the possible influence of health professionals' biological sex on the perception of the suitableness of health claims and on the attribution of responsibility in the case of presumed malpractice. (More)
Evolution of filamentous bacteria in two full-scale experimental MBR systems (microfiltration and ultrafiltration) was studied during two years. Sludge Retention Time (SRT) and Hydraulic Retention Time (HRT) were modified and acted as variables, together with temperature and variation in loading. With SRT values between 20 and 35 d and HRT between 31 and 40(More)
The aim of our study consists of contributing information on the relationship between the personality variables derived from Gray's model and the conduct that accompanies the infringement of the road traffic rules. Seven hundred and ninety-two adults of both sexes took part in the study (389 men and 403 women), all of whom had driving licences and drove(More)
Textbook options are expanding and the electronic text is poised to become prevalent in the college classroom. Cost pressures are driving this trend even as the academic value of e-textbooks has yet to be established. Limited research is available that examines the effectiveness of the e-textbook as a learning tool. This paper presents the results of a(More)
OBJECTIVE To determine the location of hyperhidrosis, the accompanying signs and symptoms, and patient anxiety assessed on 2 scales and standardized psychometric instruments. PATIENTS AND METHODS A prospective study of patients with hyperhidrosis was carried out between September 1, 2001 and June 30, 2003 with a self-administered preoperative(More)
Lutzomyia cruciata Coquillet (Diptera: Psychodidae: Phlebotominae) is a potential vector of Leishmania sp.; its geographical distribution in Mexico is widespread, but its life history is unknown. The present study gives relevant information on the life cycle, morphology, survival and reproduction of Lu. cruciata observed over successive generations under(More)
This paper explores the links between unemployment, retirement and their associated public insurance programs. It is a contribution to a growing body of literature focused on a better understanding of the labor behavior of advanced-age workers, which has gained importance as the pension crisis looms. The analysis combines a detailed exploration of the(More)