Search results for "Activity"
showing 10 items of 7178 documents
Structural Motifs of Alkali Metal Superbases in Non‐coordinating Solvents
2020
Abstract Lochmann–Schlosser superbases (LSB) are a standard reagent in synthetic chemistry to achieve an exchange of a proton on an organic framework with an alkali metal cation, which in turn can be replaced by a wide range of electrophilic groups. In standard examples, the deprotonating reagent consists of an equimolar mixture of n‐butyllithium and potassium t‐butoxide. However, the nature of the reactive species could not be pinned down either for this composition or for similar mixtures with comparable high reactivity. Despite the poor solubility and the fierce reactivity, some insights into this mixture were achieved by some indirect results, comparison with chemically related systems,…
Antibacterial Activity of Positively and Negatively Charged Hematite (α-Fe2O3) Nanoparticles to Escherichia coli, Staphylococcus aureus and Vibrio fi…
2021
This research and work has been supported by the European Regional Development Fund within the Activity 1.1.1.2 “Post-doctoral Research Aid” of the Specific Aid Objective 1.1.1 (i.e., “to increase the research and innovative capacity of scientific institutions of Latvia and the ability to attract external financing, investing in human resources and infrastructure”) of the Operational Programme “Growth and Employment” (No. 1.1.1.2/VIAA/2/18/331).
Test-retest reliability of survey items on ownership and use of physical activity trackers
2019
Background: Researchers are interested in using digital tools, such as physical activity trackers (PAT), to promote and measure physical activity. PAT is a fast-growing research area that measures movement therefore, reliable questions on the ownership and use of PATs among adolescent populations need to be developed. Objective: The aim of this study was to conduct an intra-rater test-retest reliability study on PAT survey items used for surveillance purposes among young adolescents in ownership and use of smartphone applications (apps) and heart rate monitors (HRM). Methods: Young adolescents (N = 755; 11-, 13-, and 15-year-olds) in the Olomouc region of the Czech Republic were recruited t…
Requalification of the Tobacco Factory in Palermo with destination to social finalities
2016
From the Sixties and for many years later the construction of new buildings, both public and residential, has made our cities more and more large, with a great squandering of ground, pollution and reduction of the green areas. A necessary trend reversal has implied a growing interest towards the rehabilitation and requalification of the brownfields. These, both inside the urban fabric and in suburban areas, offer complexes of buildings with great potentiality for a sustainable reuse both from the social point of view and from the environmental one. The large dimensions, the great spans and the materials usually used make these buildings suitable to a recovery which makes possible a rehabili…
Habitual physical activity and heart rate variability in 12-year old children
2012
ABSTRACT Wennman, Heini 2012. Habitual physical activity and heart rate variability in 12-year old children. Department of Biology of Physical Activity, University of Jyväskylä, 92p. The study of heart rate variability (HRV) provides useful information about the function of the cardiac autonomic nervous system. The effects of many environmental factors on HRV are well known, but the associations between physical activity (PA) and HRV, especially in children, are less investigated. Higher HRV is related to health and many pathologic conditions are associated with reduced HRV. Exercise causes HRV to diminish, but improves HRV in long term. PA promotes many health related changes in energy met…
Lavatanssiko liikuntaa? : lavatanssi-illan fyysinen aktiivisuus ja kuormittavuus sekä niihin yhteydessä olevat tekijät
2012
Lavatanssi on kasvattanut suosiotaan viime vuosikymmeninä. Terveys- ja kuntoliikuntamuotona sitä on tutkittu varsin vähän. Tutkimuksen tarkoituksena oli selvittää lavatanssin fyysistä aktiivisuutta ja kuormittavuutta sekä niihin yhteydessä olevia tekijöitä. Yhden tanssi-illan aikana tammikuussa 2011 tanssijoiden fyysistä kuormittavuutta mitattiin sykemittareilla ja fyysistä aktiivisuutta selvitettiin askelmittareilla. Taustatietoja kerättiin sähköisellä kyselylomakkeella. Tutkimukseen osallistui 58 vapaaehtoisesti ilmoittautunutta tanssinharrastajaa. Kolmen tunnin lavatanssi-illan aikana tutkittavien keskisyke oli 116 ± 16 bpm, korkein syke 160 ± 15 bpm, ja energiankulutus miehillä 2043 ± 5…
The relationship between leisure-time physical activity and stress on workdays with special reference to heart rate variability analyses
2016
The purpose of this study was to investigate how physical activity (PA), cardio- respiratory fitness, and body composition are associated with objective heart rate variability (HRV)-based indicators of stress and recovery on workdays. Additionally, the association of subjective self-reported stress with HRV-based stress was investigated. Samples of 81 healthy men (age 26–40 years), and 16 275 Finnish employees (6863 men and 9412 women; age 18–65 years) were assessed in the cross-sectional analyses. A sample of 221 overweight psychologically distressed individuals (36 men and 185 women; age 26–60 years) was examined in both cross-sectional and longitudinal analyses. HRV-based stress and reco…
Sympathetic nervous system synchrony between participants of couple therapy
2017
Synchrony, or the moment-by-moment coordination between people in social situations, has been connected with increased liking and rapport. However, this type of synchrony is an underexplored area with regard to autonomic nervous system activity. The purpose of this research was to study physiological synchrony between participants in couple therapy by focusing on the sympathetic nervous system (SNS), which reflects arousal and emotional reactions. The data comprised 12 couple therapy cases (24 clients, 10 therapists) participating in the Relational Mind in Events of Change in Multiactor Therapeutic Dialogues (2013-2016) research project. Electrodermal activity (EDA) and heart rate were reco…
Associations Between Sympathetic Nervous System Synchrony, Movement Synchrony, and Speech in Couple Therapy
2022
Background: Research on interpersonal synchrony has mostly focused on a single modality, and hence little is known about the connections between different types of social attunement. In this study, the relationship between sympathetic nervous system synchrony, movement synchrony, and the amount of speech were studied in couple therapy. Methods: Data comprised 12 couple therapy cases (24 clients and 10 therapists working in pairs as co-therapists). Synchrony in electrodermal activity, head and body movement, and the amount of speech and simultaneous speech during the sessions were analyzed in 12 sessions at the start of couple therapy (all 72 dyads) and eight sessions at the end of therapy (…
Reaction of polyamines with diethyloxalate: a convenient route for the synthesis of tetraazacycloalkanes
2006
International audience; The reactivity of various polyamines with diethyloxalate has been investigated. It appears that, in similar experimental conditions, primary diamines give predominantly [2+2] adducts while the use of secondary benzylated polyamines results in [1+1] condensation. Although the intermediate tetraamides formed in the first case are extremely poorly soluble and show very slow reactivity towards reducing agents, cyclam has been obtained by using ultrasounds during the reaction of the corresponding tetraoxomacrocycle with BH 3 /THF. The [1+1] cyclization reaction of diversely N-benzylated linear tetraamines, whose selective syntheses have been devised herein, gives access t…