Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl
Ograniczanie wyników
Czasopisma help
Lata help
Autorzy help
Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 27

Liczba wyników na stronie
first rewind previous Strona / 2 next fast forward last
Wyniki wyszukiwania
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 2 next fast forward last
EN
Reduction of the fungal community in soil caused by the addition of the fungicide methiram and the antibiotic actidione was accompanied by an intensive development of the community of copiotrophic bacteria. Irrespective of the fungal toxic substances used, there was a particularly conspicuous increase in the numbers of bacteria belonging to fluorescent Pseudomonas, among which three morphologically and physiologically different groups were distinguished. All the isolated strains of Pseudomonas were mycolytic and antibiotic for typical bacteria and actinomycetes; most of them decomposed methiram, but none decomposed actidione. Moreover, propagating rapidly in the presence of methiram were also bacteria from the species Vibrio proteolyticus (Aeromonas proteolyticus), and in the presence of actidione, bacteria from the species Sporocytophaga myxococcoides. The Vibrio strains, but not those of Sporocytophaga, were also mycolytic, like fluorescent Pseudomonas. Contrary to Pseudomonas, no strain of Vibrio nor of Sporocytophaga was antibiotic for typical bacteria and actinomycetes or able to decompose methiram or actidione.
EN
In incubation experiments the microbiological equilibrium of two sandy soils was unsettled using captan in a dose which considerably influenced fungi. The reduction of the fungal community contributed to an intensive multiplication of the bacteria detectable by the cultural method, particularly of the number of their eutrophic forms. However, the changes in the discussed ecotrophic group of bacteria were not accompanied by an increase in the total number of the soil bacteria community detectable with the help of the microscope and consisted for the most part from oligotrophic bacteria. Moreover, there was a continous declining tendency and overall microbial activity of the soil was in most instances reduced. All the described effects were intensified by the addition of fresh organic matter.
EN
The article reviews the main milk fat globule membrane (MFGM) protein, butyrophilin. Butyrophilin is an acidic, transmembrane glycoprotein which reveals the general receptor structure. Its unique location within the cell, the domain structure of the protein and site-specific expression occurring only during lactation indicate that butyrophilin protein is of great importance in milk lipid secretion process.
16
51%
EN
Mycotoxins have a proven toxic effect on the health of humans and animals. Nowadays, there is a focus on having a healthy lifestyle and consuming organic foods. High quality grain products, especially spelt products, which are an important element of a well-balanced diet have become more popular. The aim of this study was to determine the mycotoxin content in spelt products available on the Polish market. Spelt products were collected in 2009 and 2010 in eastern Poland. The Enzyme-Linked ImmunoSorbent Assay (ELISA) method was used to identify aflatoxins, ochratoxin A, T-2 toxin, deoxynivalenol, and zearalenone. The study confirmed that all investigated mycotoxins were present in spelt products.
EN
Effect of temperature of thermo-mechanical treatment of pine wood (Pinus sylvestris L.) veneers upon gloss and wettability. The aim of investigations was determination of gloss and wettability of pine wood veneers after thermo-mechanical treatment. Rotary cut veneer sheets of pine wood and moisture content of 5% were chosen for the experiments. In laboratory hydraulic press was densification at temperatures of 150, 180, and 210°C, pressure 3 MPa, and time 3 min. Gloss of veneers was determined with the photoelectric method with PICO GLOSS apparatus. Wettability measurements were performed microscope methods with the goniometric eąuipment. It was stated, that temperature of thermo-mechanical treatment influenced on the course of gloss and wettability.
PL
Wpływ temperatury procesu termo-mechanicznej modyfikacji fornirów z drewna sosny zwyczajnej (Pinus sylvestris L.) na połysk i zwilżalność. Celem badań było określenie wpływu temperatury procesu modyfikacji termo-mechanicznej fornirów z drewna sosny zwyczajnej na kształtowanie się połysku i zwilżalności powierzchni. Proces zagęszczania fornirów prowadzono w hydraulicznej prasie laboratoryjnej w temp. 150, 180 i 210°C, ciśnieniu jednostkowym 3 MPa oraz czasie 3 min. Połysk określono metodą fotoelektryczną przy zastosowaniu połyskomierza PICO GLOSS, model 503 prowadząc pomiary przy trzech kątach 20, 65 i 80°, odpowiednio wzdłuż i w poprzek włókien. Pomiary kąta zwilżania wykonano metodą mikroskopową. Na podstawie uzyskanych wartości, wyznaczono swobodną energię powierzchniową wraz z jej składowymi dyspersyjną i polarną. Stwierdzono, że prowadzenie obróbki termomechanicznej fornirów z drewna sosny w temp. 180 i 210°C powoduje zwiększenie stopnia połysku z efektu mat na półmat. Zwiększanie temperatury modyfikacji powodowało obniżanie wartości swobodnej energii powierzchniowej, co wynikało z obniżania składowej polarnej.
EN
The aim of this work was to provide some economic and technological aspects of using adhesion promoters in furniture industry. The specific surface of wood and plastics as materials for gluing, activation methods of the substrate with particular consult the adhesion promoters, emphasizing economic issues were characterized. It was stated, that physical activation methods require the highest investment costs incurred, but which are quickly compensate by the greater line efficiency and minimum waste. Alternative meriting the attention solution is the preparation of the substrate for gluing by the use of adhesion promoters, and then conducting connecting process with the use of conventional adhesive for the lower prices.
first rewind previous Strona / 2 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.