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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.
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.
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.
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.
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