Ograniczanie wyników

Czasopisma help
Autorzy help
Lata help
Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 23

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  gas
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
The natural precedence of microorganisms growth on the damp surfaces is the formation of biofilm. The arising biolayer, stabilized by extracellular substances, is becoming hard to remove biological structure, the enzymatic activity of which can lead to violation of the packaging, and consequently to acceleration of the process of food spoilage. The microorganisms of Pseudomonas species are widely spread in food products’ environment. In order to perform the analysis three types of food wrapping foils from polyamide – polyethylene (PA/PE), which were kept in Pseudomonas culture, were used in the study. Two strains were used – the standard ATCC 15442 (WZ) and the strain isolated from pork-beef minced meat (MB) airtight packaged. All cultures were run at the temperatures 4°C and 20°C. It was reported that on all types of food wrapping foils biofilms were developed, which were formed by Ps. aeruginosa. The biolayers developed decreased permeability of foils, which was shown by restriction of permeability for gases. The changes of foils properties analysed here were most of all dependent on the type of the foil.
Primary energy consumption in Poland, European Union and word-wide has been presented. Energy sources as well as export-import balance of fossil fuels of selected countries have been correlated. The study allows to state that energy sources situation, availability of resources and vital investments require an intensive development of nuclear energy sector and renewable energy sources in Poland.
One of the modern techniques of mixture separation is the application of liquid membranes. They reveal the ability of selective transport of mixture components in which a liquid membrane constitutes a separate phase which separates two other liquid or gas phases. This property of membranes makes them useful in the textile and food industries, in hydrometallurgy, medicine, biotechnology, environmental protection, in the separation of hydrocarbons and gases, and in the concentration and separation of amino acids, metal ions and other mixtures and suspensions.
Our paper discusses many types of samplers used for collecting samples from precipitation and atmospheric deposits (fog and cloud water, dew, hoarfrost and rime). Equipment of various degrees of automation is presented. The paper also presents bibliographical information on the concentration range of inorganic and organic compounds in precipitation and atmospheric deposit samples, the storage and/or preparation of samples for analysis, and the techniques of final determination.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.