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Health risk assessment related to hydrogen peroxide presence in the workplace atmosphere – analytical methods evaluation for an innovative monitoring protocol

100%

Mucci N., Dugheri S., Bonari A., Farioli A., Rapisarda V., Garzaro G., Cappelli G., Arcangeli G.

International Journal of Occupational Medicine and Environmental Health

2020

vol. 33

issue 2

137-150

ObjectivesHydrogen peroxide (HP) accounts for 15% of the total global chemical revenue. According to the National Institute of Occupational Safety and Health, the HP concentration immediately dangerous to human life or health is 75 ppm. Operators exposed to HP should pay attention when choosing the monitoring technique that should be specific and sensitive enough to discriminate the exposure levels from background concentrations. In order to assess the long- and short-term exposure to HP in disinfection processes, the authors compared 6 industrial hygiene monitoring methods to evaluate their efficiency in measuring airborne HP concentrations.Material and MethodsAirborne HP concentrations were evaluated using an on-fiber triphenylphosphine solid-phase microextraction method, and they were compared with those obtained using a 13-mm Swinnex titanium oxysulfate filter holder and 4 portable direct-reading electrochemical sensors. A survey carried out in wood pulp bleaching, food and beverage disinfection processing, and in a hospital department to reduce the risk of spreading nosocomial infections, was performed during routine operations to access the risk of HP occupational exposure.ResultsThrough the generation of HP gaseous dynamic atmospheres (0.1–85 ppm), the authors evaluated the consistency of the results obtained using the 6 methods described. The monitoring campaigns showed that the increase in HP could be relatively high (until 67 ppm) in food and beverage processing.ConclusionsIn the authors’ opinion, the current 8-h time-weighted average limits of 1 ppm for HP do not reflect the actual risk; a short-term exposure limit would, therefore, provide a much better protection.

Poliaminy – być albo nie być dla rośliny

67%

Ciąćka K., Krasuska U.

Edukacja Biologiczna i Środowiskowa

2014

issue 2

3-10

Putrescyna (Put), spermidyna (Spd) oraz spermina (Spm) należą do klasycznych poliamin (PA), występujących u wszystkich żywych organizmów. W przypadku roślin związki te znane są przede wszystkim z dobroczynnej roli, którą odgrywają podczas stresów biotycznych i abiotycznych, jednak pełnią również szereg innych ważnych funkcji, umożliwiających prawidłowe funkcjonowanie komórek. Oprócz bezpośredniego wpływu na procesy życiowe komórki, coraz liczniejsze badania wskazują na współdziałanie PA z cząsteczkami sygnałowymi takimi jak nadtlenek wodoru (H2O2) i tlenek azotu (NO) w ścieżkach transdukcji sygnałów. Zarówno nadmiar jak i brak PA negatywnie wpływa na losy komórki, stąd też istotna jest regulacja biosyntezy i degradacji PA warunkująca ich równowagę. Niniejsza praca stanowi przegląd wiadomości na temat PA i ich oddziaływania na życie roślin.

Putrescine (Put), spermidine (Spd) and spermine (Spm) are basic polyamines (PAs), occurring in every one living organism including plants. Polyamines belong to the group of plant growth regulators and are well recognized due to their protecting role during plant response to biotic and abiotic stresses. PAs play also a crucial role in regulation of many physiological processes e.g. seed germination or plant senescence. Both, excess and deficit of PAs is deleterious for cells. Therefore, control of PAs biosynthesis and degradation determining their homeostasis is of high importance. PAs synthesis is link to pathways of ethylene and nitric oxide (NO) biosynthesis, while PAs catabolism leads to hydrogen peroxide (H2O2) production, thus it is clear that PAs operate in a network with classical phytohormones and signaling molecules. The work summarizes the current knowledge on PAs metabolism and their impact on growth and development of plants.

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1 Edukacja Biologiczna i Środowiskowa

1 International Journal of Occupational Medicine and Environmental Health

1 Arcangeli G.

1 Bonari A.

1 Cappelli G.

1 Ciąćka K.

1 Dugheri S.

1 Farioli A.

1 Garzaro G.

1 Krasuska U.

1 Mucci N.

1 Rapisarda V.

1 2020

1 2014

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Health risk assessment related to hydrogen peroxide presence in the workplace atmosphere – analytical methods evaluation for an innovative monitoring protocol

Poliaminy – być albo nie być dla rośliny