Autor: Pielech-Przybylska, Katarzyna - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Buckwheat as an Interesting Raw Material for Agricultural Distillate Production
Autorzy:: Ługowoj, Szymon
Balcerek, Maria
Pielech-Przybylska, Katarzyna
Powiązania:: https://bibliotekanauki.pl/articles/1369595.pdf
Data publikacji:: 2020
Wydawca:: Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:: buckwheat
reducing sugars
starch content
ethanol fermentation
agricultural distillate
volatile compounds
Opis:: The objective of this study was to assess the suitability of buckwheat grain for agricultural distillate production. The effects of the method of starch liberation on the physicochemical composition of the prepared mashes, fermentation results, the concentration of volatile compounds in the obtained distillates, and their organoleptic features, were investigated. The raw materials used were two cultivars of buckwheat grains, Panda and Kora. Both cultivars were characterized by similar starch content, however Panda cultivar had a significantly higher content of reducing sugars. Fermentation of the Kora cultivar-based mashes resulted in a higher fermentation efficiency (up to approximately 85% of the theoretical yield) compared to the Panda cultivar-based mashes (up to approx. 75%). Of the tested methods of starch liberation, the pressure-thermal treatment was revealed as superior, especially in the case of the Panda cultivar. In the case of the Kora cultivar, both the pressure-thermal method and the pressureless method of starch liberation resulted in a high process efficiency (up to 85% of the theoretical). Supplementation of the buckwheat mashes with (NH4)2HPO4 improved fermentation results. The highest scores in sensory assessment were given to distillates from mashes prepared with the pressure-thermal treatment, which contained relatively low concentrations of undesirable compounds, such as acetaldehyde and methanol, and revealed pleasant organoleptic features.
Źródło:: Polish Journal of Food and Nutrition Sciences; 2020, 70, 2; 125-137
1230-0322
2083-6007
Pojawia się w:: Polish Journal of Food and Nutrition Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The efficiency of nuisance relief by filtering facepiece respirators used by workers exposed to agricultural odours
Autorzy:: Okrasa, Małgorzata
Majchrzycka, Katarzyna
Szulc, Justyna
Pielech-Przybylska, Katarzyna
Powiązania:: https://bibliotekanauki.pl/articles/22639563.pdf
Data publikacji:: 2023-12-15
Wydawca:: Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:: agriculture
microbiological contamination
odour nuisance
filtering facepiece respirators
Time4Mask
worker safety and well-being
Opis:: Background The study aimed to evaluate the effectiveness of filtering facepiece respirators (FFRs) in reducing odour nuisances in agricultural work environment. Additionally, an assessment was conducted on the microbiological contamination of FFRs and the functionality of Time4Mask application in enhancing workplace safety. Material and Methods Two types of FFRs were used for the study: with absorbing properties and reference ones. The research was carried out in 6 livestock rooms during a 1-week period in early spring (February–March 2021) on a farm in central Poland. The microclimate conditions (thermoanemometer), and particulate matter concentrations (laser photometer) were assessed. Additionally, the odour content in the studied rooms and the breathing zone of FFR users (gas chromatography with mass spectrometry) were evaluated. The number of microorganisms on the respirators was determined (cultivation method), followed by their identification (biochemical tests, taxonomic keys). Breakthrough curves were determined for both FFR types to assess absorption capabilities. Results The average temperature in the livestock rooms was about 13°C, relative humidity – 53%, air flow velocity – 0.21 m/s, and particulate matter concentration – 0.216 mg/m³. A significant variety of odorants was found in the environment and the breathing zone under the FFRs. Bacterial counts ranged between 2.4 × 10¹ and 2.6 × 10² CFU/cm², fungi between 3.2 × 10⁰ and 5.4 × 10¹ CFU/cm², xerophilic fungi from 4.4 × 10⁰ to 4.0 × 10¹ CFU/cm², mannitol-positive staphylococci between 1.6 × 10¹ and 1.0 × 10² CFU/cm², and haemolytic staphylococci from 2.2 × 10¹ to 4.5 × 10¹ CFU/cm², depending on the respirator type. Respirators were colonized by bacteria from the genera: Bacillus, Staphylococcus, actinobacteria Streptomyces sp., and fungi: Candida, Absidia, Aspergillus, Mucor, and Penicillium. Respirators with absorbing properties had over 8-times longer breakthrough time than reference ones. Conclusions Respirators with activated carbon effectively improved work comfort when exposed to odours. Due to growth of microorganisms in the respirator materials, periodic replacement is necessary. It is crucial to provide workers with information about the safe-use time of respirators, considering environmental conditions. This is achievable using modern IT tools like Time4Mask application.
Źródło:: Medycyna Pracy. Workers’ Health and Safety; 2023, 74, 5; 363-375
0465-5893
2353-1339
Pojawia się w:: Medycyna Pracy. Workers’ Health and Safety
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The evaluation of microbial contamination in the working environment of tanneries
Ocena zanieczyszczenia mikrobiologicznego na stanowiskach pracy w garbarniach
Autorzy:: Skóra, Justyna
Gutarowska, Beata
Stępień, Łukasz
Otlewska, Anna
Pielech-Przybylska, Katarzyna
Powiązania:: https://bibliotekanauki.pl/articles/2166284.pdf
Data publikacji:: 2014-10-28
Wydawca:: Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:: garbarnia
bioaerozol
zanieczyszczenie mikrobiologiczne
wskaźniki mikrobiologiczne
tanneries
bioaerosols
microbial contamination
microbial indicators
Opis:: Background: Due to their animal material processing, tannery workers may be exposed to biological agents. The aim of the study was the microbial contamination assessment of tanneries with different production specifications. Health risk was estimated based on particle size distribution. Moreover, indicators of microbial contamination of tanneries were selected. Materials and Methods: The studies were conducted in 2 types of tanneries - processing raw hides and producing chrome-tanned leather. Air was sampled with MAS-100 Eco Air Sampler, leathers using RODAC Envirocheck® contact plates and swab method, microbial numbers were determined by a culture method. For the bioaerosols size distribution analysis, a six-stage Andersen sampler was used; identification was performed using microscopy and biochemical methods. Microbial contamination was identified by 16S RNA and ITS1/2 rDNA analysis for bacteria and fungi respectively. Results: The microbial number in the air ranged between 1.2×10³ and 3.7×10³ CFU/m³. While on the leather, it ranged between 7.6×10¹ and 5.5×10⁵ CFU/100 cm². Bacteria dominated in the tanneries (air: 51-92%, leathers: 60-100%). Results indicate that potential health risks arise from the fungal small bioaerosol particles presence (0.65-2.1 μm). Eleven indicator microorganisms were determined: B. pumilus, B. subtilis, B. cereus, C. lubricantis, C. cladosporioides, P. commune, P. echinulatum, P. chrysogenum, P. crustosum, C. parapsilosis and C. albidus. Conclusions: Microbial contamination evaluation in the tanneries showed the increased bacteria and fungi number in the air in relation to the outdoor air, which indicates an occupational inhalation risk to workers. The designated indicators of microbial contamination in the tanneries are associated with their specific and potentially pathogenic working environment. Med Pr 2014;65(1):15–32
Wstęp: Z powodu przetwarzania surowca zwierzęcego w garbarniach pracownicy mogą być narażeni na czynniki biologiczne. Celem badań była ocena zanieczyszczenia mikrobiologicznego w garbarniach o różnej specyfice produkcji. Określono także ryzyko zdrowotne w oparciu o rozkład ziarninowy bioaerozolu. Ponadto wyznaczono wskaźniki zanieczyszczenia mikrobiologicznego w garbarniach. Materiał i metody: Badania przeprowadzono w dwóch rodzajach garbarni - przetwarzających skóry surowe i chromowo garbowane (wet blue). Powietrze pobierano próbnikiem MAS-100 Eco, próby ze skór, używając płytek odciskowych RODAC Envirocheck® i metody tamponowej, a liczbę mikroorganizmów określano metodą hodowlaną. Rozkład cząstek biooaerozolu wykonano z użyciem 6-stopniowego impaktora Andersena. Identyfikację drobnoustrojów wykonano metodą mikroskopową i testami biochemicznymi. Wskaźniki zanieczyszczenia mikrobiologicznego identyfikowano, analizując odpowiednio dla bakterii i grzybów sekwencje 16S RNA i ITS1/2 rDNA. Wyniki: Liczebność mikroorganizmów w powietrzu w garbarniach kształtowała się w granicach 1,2×10³-3,7×10³ jtk/m³. Skóry były zanieczyszczone mikrobiologicznie w granicach 7,6×10¹-5,5×10⁵ jtk/100 cm². W garbarniach dominowały liczbowo bakterie (w powietrzu: 51-92%, na skórach: 60-100%). Wskazano na zagrożenie zdrowotne wynikające z obecności cząstek bioaerozolu grzybowego o rozmiarach 0,65-2,1 μm. Wyznaczono 11 gatunków drobnoustrojów wskaźnikowych dla garbarni: B. pumilus, B. subtilis, B. cereus, C. lubricantis, C. cladosporioides, P. commune, P. echinulatum, P. chrysogenum, P. crustosum, C. parapsilosis i C. albidus. Wnioski: Ocena zanieczyszczenia mikrobiologicznego w garbarniach wykazała podwyższoną liczebność bakterii i grzybów w powietrzu w stosunku do powietrza atmosferycznego, co świadczy o występowaniu narażenia inhalacyjnego pracowników. Wyznaczone wskaźniki zanieczyszczenia mikrobiologicznego w garbarni są związane ze specyfiką środowiska pracy i potencjalnie chorobotwórcze. Med. Pr. 2014;65(1):15–32
Źródło:: Medycyna Pracy; 2014, 65, 1; 15-32
0465-5893
2353-1339
Pojawia się w:: Medycyna Pracy
Dostawca treści:: Biblioteka Nauki

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