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EN
Field study was performed on Haplic Luvisol soil to determine the effects of soil compaction and straw mulching on microbial parameters of soil under soybean. Treatments with different compaction were established on unmulched and mulched with straw soil. The effect of soil compaction and straw mulching on the total bacteria number and activities of dehydrogenases, protease, alkaline and acid phosphatases was studied. The results of study indicated the decrease of enzymes activities in strongly compacted soil and their increase in medium compacted soil as compared to no-compacted treatment. Mulch application caused stimulation of the bacteria total number and enzymatic activity in the soil under all compaction levels. Compaction and mulch effects were significant for all analyzed microbial parameters (P<0.001).
EN
Sandy sediments coming from three beaches of the southern Baltic Sea were collected and analyzed. Investigated beaches were divided according to strength of anthropogenic impact and degree of sheltering. The first beach was situated in Ustka on the eastern side of the mouth of the Słupia River, second in Czołpino and the last one in Puck. Core sediment samples were collected seasonally, depending on the influence of the sea water on the examined sediments. At each station, surface sediments (0-5 cm) were collected as well as sediments at the depth of 10-15 cm. The general content of organic matter, proteins, lipids, carbohydrates, organic carbon and total bacterial number were determined. The results of the conducted tests reveal, that anthropopressure, degree of sheltering, the depth where the collected sediments were taken and the direct influence of the sea water on the sediments have impact on the chemical composition of organic matter and bacterial number in beach sediments.
PL
Pobierano i analizowano piaszczyste osady pochodzące z trzech plaż południowego Bałtyku, które zostały podzielone na podstawie wpływu antropopresji i stopnia osłonięcia plaży. Pierwsza plaża położona była w Ustce we wschodniej części ujścia rzeki Słupi, druga w Czołpinie, a ostatnia w Pucku. Próbki osadów plażowych zbierano sezonowo, w zależności od wpływu wody morskiej na badane osady. Na każdym stanowisku pobierano osady powierzchniowe (0-5 cm), a także osady na głębokości 10-15 cm. Określono zawartość materii organicznej, białek, lipidów, węglowodanów, węgla organicznego i całkowitej liczby bakterii. Wyniki przeprowadzonych badań wykazały, że antropopresja, stopień osłonięcia plaży, głębokość pobieranych osadów i bezpośredni wpływ wody morskiej na osady oddziałują na skład chemiczny materii organicznej i liczbę bakterii w osadach plażowych.
EN
The effects of inorganic nutrients (N, P) enrichment of mesotrophic lake water on changes in bacterial and protistan (heterotrophic nanoflagellates and ciliates) communities compositions were studied in the mesocosm experiment. Phosphorus (PO₄³⁻) and nitrogen (NH₄⁺) alone and in combination were added to three types of experimental mesocosms. Mesocosms results suggested that simultaneous addition of P and N stimulated phytoplankton growth and production rates of bacterial biomass its turnover rate. Strong positive correlations between chlorophyll a and bacterial secondary production rates suggested that bacteria were mainly controlled by organic substrates released in course of phytoplankton photosynthesis. Both nutrients increased distinctly protistan biomass and resulted in the shift in ciliate community composition from algivorous to large omnivorous species. The response of bacterial numbers and biomass to nutrients addition was less evident. However, intensive grazing caused their dynamic changes. Fluorescence in situ hybridization (FISH) revealed only small changes in bacterial taxonomic composition. There was an apparent shift in dominance from Cytophaga-Flavobacterium to the Alphaproteobacteria group in the mesocosm with simultaneous addition of P and N, which positively related to increased abundance of bacterivorous protists. Experiment demonstrated that inorganic N and P nutrients directly influenced the bottom-down control of microbial communities, which had a crucial effect on morphological diversity of bacteria.
EN
The present paper provides an account of a study on benzene, toluene and xylene degradation by neustonic and planktonic bacteria in lake Jeziorak Mary. Aromatic hydrocarbons were better decomposed by neustonic bacteria than planktonic bacteria. Moreover, the obtained data point to the total number of bacteria and heterotrophic bacteria number being greater in surface microlayer than in subsurface water.
PL
Celem pracy jest wykazanie obecności bakterii w materiale pobranym z cewników dializowanych owiec w formie badań wstępnych. Pięć permanentnych kateterów zostało założonych pięciu owcom w żyłę szyjną zewnętrzną. Materiał do badań w postaci heparyny o stężeniu 1250 j.m./ml pobierano ze światła cewnika co 10 dni na przestrzeni czasu, w którym odbywały się dializy. Przeprowadzono 30 analiz mikrobiologicznych w celu określenia ogólnej liczby bakterii, bakterii Echerichia coli oraz bakterii z grupy coli. W 50% prób wykazano obecność drobnoustrojów, z czego tylko w jednej stwierdzono obecność bakterii z grupy coli. Implantacja permanentnych cewników hemodializacyjnych wiąże się z ryzykiem wystąpienia infekcji wtórnych. Wyniki badań wskazują na możliwość wystąpienia zakażeń odcewnikowych i rozwinięcie ewentualnej bakteriemii u hemodializowanych zwierząt.
EN
The aim of the study is to evaluate the presence of bacteria in material collected from catheter lumen in dialyzed sheep as a preliminary study. Five permanent catheters were inserted into the external jugular vein of five sheep. Every 10 days during two months the 1250 j.m./ml heparin from catheters was collected to examination. The 30 microbiological analyses were carried out to define the total number of bacteria, Echerichia coli and coliform bacteria. The microorganisms were isolated from 50% samples but only one of the 30 samples contained coliform bacteria. The dialysis catheters are a common cause of infections in hemodialysis patients. The results demonstrated the possibility of catheter-related bacteremia in animals with hemodialysis catheters.
PL
Badania jakości mikrobiologicznej powietrza wewnętrznego na terenie Wydziału Budownictwa i Inżynierii Środowiska przeprowadzono metodą sedymentacyjną. Wykonano sześć serii pomiarowych od jesieni 2002 roku do wiosny 2003 roku. Otrzymane wyniki badań wskazują na zanieczyszczenie mikrobiologiczne powietrza wewnętrznego w badanym budynku. Przekroczenia norm jakości powietrza dotyczą przede wszystkim gronkowców i promieniowców, a także ogólnej liczby bakterii.
EN
The investigation of microbiological rate of indoor air pollution on Faculty of Building and Environmental Engineering at Białystok University of Technology were made by sedimentation method in accordance with Polish standards (PN-89/Z-04111/01,02,03). Six series of measurements were carried out from autumn 2002 to spring 2003. The results show bad microbiological quality of indoor air on Faculty of Building and Environmental Engineering at Białystok University of Technology. It was found that the number of Stphylococcus, Actinomycetales as well as the total count of bacteria were too high and broke the Polish regulations of the clear air. Because of the students' and other workers' safety, monitoring of microbiological pollution of the indoor air must be done and existing emergency to improve the quality of the air must be lead.
PL
Badano jak zmienia się liczebność trzech podstawowych grup drobnoustrojów: bakterii, grzybów, promieniowców oraz poziom biomasy żywych mikroorganizmów w glebie, do której dodano różne ilości oleju napędowego do silników Diesla.
EN
In laboratory conditions the influence of Diesel fuel oil on the total number bacteria, fungi, actinomycetes and content of microbial biomass in soil was studied. The fuel oil was applied at dosage of 1, 2 and 5 g/100 g of soil. Samples of soil were analysed 1, 7, 14, 21 and 150 days after oil applied. Microbiological analyses involved determinations of the total number of bacteria and actinomycetes (on Bunta-Roviry medium) and fungi (on Martins agar) by the plate method. The content of microbial biomass in soil was determined using the physiological method of Anderson and Domsch. Diesel fuel oil application caused the changes of total number of investigated groups of soil microorganisms. These results were confirmed by the investigated groups of soil microorganisms. These results were confirmed by the investigation on microbial biomass in soil. In the most of cases the fuel oil was the most stimulated for the number of bacteria and the most inhibited for actinomycetes in comparision with soil without oil (control). From soil with Diesel fuel oil addition Pseudomonas, Arhtrobacter, Bacillus and Penicillium, Aspergillus, Fusarium, Trichoderma strains were isolated. The possibility of the fuel oil as sourse of carbom utilization by these strains will be investigate.
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