Full-text resources of PSJD and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl
Preferences help
Polish version English version Language
enabled [disable] Abstract
Number of results

Results found: 2

Number of results on page
first rewind previous Page / 1 next fast forward last

Search results

Search:
in the keywords:  jakość powietrza
help Sort By:

help Limit search:
first rewind previous Page / 1 next fast forward last
1
Publication available in full text mode
Content available

Czy zwiększona zawartość dwutlenku węgla w powietrzu ma wpływ na sprawność intelektualną człowieka?

100%
Murkowski A., Skórska E.
Kosmos
|
2016
|
vol. 65
|
issue 4
631-636
PL
Szczególnym składnikiem powietrza atmosferycznego jest dwutlenek węgla, którego zawartość systematycznie wzrasta i w 2015 r. przekroczyła 400 ppm. Według norm europejskich i amerykańskich w pomieszczeniach zamkniętych zawartość CO2 nie powinna przekraczać 1000 ppm. Pomiary wykonane w pomieszczeniach szkolnych i salach uczelnianych wykazywały wielokrotne przekroczenie tej wartości, osiągając nawet 7000 ppm. Do niedawna uważano, że umiarkowanie podwyższone stężenie dwutlenku węgla (do ok. 5000 ppm) powoduje jedynie przejściowy dyskomfort (ból głowy, złe samopoczucie, niepokój), bez istotnego wpływu na funkcje umysłowe i jakość wykonywanej pracy. Coraz liczniejsze badania wskazują jednak na obniżoną zdolność percepcji i sprawność intelektualną, gdy zawartość CO2 w pomieszczeniach przekracza 1400 ppm. W bardzo starannie przeprowadzonych eksperymentach amerykańskich wykazano, że nawet przy umiarkowanie podwyższonym poziomie (2500 ppm CO2) może nastąpić upośledzenie działań decyzyjnych, zdolność do podejmowania inicjatywy i umiejętność myślenia strategicznego.
EN
Carbon dioxide is a specific component of atmospheric air, its content steadily increases, and in 2015 it exceeded 400 ppm. According to European and American standards indoor CO2 content should not exceed 1000 ppm. Measurements taken in school classrooms and university auditoria showed that this value was exceeded multifold, reaching reaching even 7000 ppm. Until recently it was thought that a moderately elevated levels of carbon dioxide (up to approx. 5000 ppm) cause only temporary discomfort (headaches, feeling unwell, anxiety), without significantly affecting the quality of work and mental functions. Increasing number of observations indicate a decreased ability of perception and intellectual performance, when the CO2 content in the room exceeds 1400 ppm. Very carefully conducted experiments in USA have demonstrated that even moderately elevated levels (2500 ppm CO2) can impair decision-making activities, the ability to take initiative and ability to think strategically.
2
Content available remote

Evaluation Of The Usefulness Of Spider Webs As An Air Quality Monitoring Tool For Heavy Metals

72%
Rybak J., Spówka I., Zwoździak A., Fortuna M., Trzepla-Nabagło K.
|
|
issue 3
389-400
EN
The study aims at evaluating whether webs reflect the level of air pollution measured with conventional methods. Webs of species Malthonica silvestris (l. KOCH, 1872) (Araneae: Agelenidae) were sampled. Samples were analyzed for heavy metals (Pb, Zn) content. According webs analyses and classic measurements three traffic-oriented sites in Wroclaw (South-West Poland) showed significantly higher mean concentrations of heavy metals than two other sites situated in quieter, low traffic areas. A very strong significant positive correlation was revealed among average concentrations of Zn and Pb associated with fine particulate matter of atmospheric aerosol (PM1) and webs. We also observed a very strong significant positive correlation among Zn and Pb concentrations on webs and PM2.5. Any significant correlation among PM-emission fractions 2.5 and 10 and associated heavy metals and dust deposited on spider webs was not observed. Although spider webs proved useful indicators of environmental pollution the obtained results suggest that this tool should be used to evaluate the emission of heavy metals in the similar way as other bioindicators such as mosses and lichens are commonly used. The measured concentrations on webs do not reflect results obtained with classic methods. We conclude that spider webs are good for bioindication of road traffic emissions, they could be even more reliable compared to use of some other bioindicators whose activity is often limited by the lack of water and sun.
first rewind previous Page / 1 next fast forward last
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.