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Wyszukujesz frazę "yeast cell" wg kryterium: Temat

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    Wyświetlanie 1-12 z 12
    Tytuł:
    Changes in cell numbers and the ATP content in immobilized yeast cells during the continuous ethanol fermentation
    Autorzy:
    Paterczyk, J.
    Trzcinska, M.
    Sieliwanowicz, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1371452.pdf
    Data publikacji:
    1992
    Wydawca:
    Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
    Tematy:
    porous glass
    cell number
    immobilization
    calcium alginate
    ethanol fermentation
    yeast cell
    Saccharomyces cerevisiae
    Źródło:
    Polish Journal of Food and Nutrition Sciences; 1992, 01, 4; 29-36
    1230-0322
    2083-6007
    Pojawia się w:
    Polish Journal of Food and Nutrition Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Difference in the late ergosterol biosynthesis between yeast spheroplasts and intact cells
    Autorzy:
    Ferrante, Terenzio
    Viola, Franca
    Balliano, Gianni
    Oliaro-Bosso, Simonetta
    Powiązania:
    https://bibliotekanauki.pl/articles/1038831.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    yeast cell wall
    spheroplasts
    late sterol biosynthesis
    engineered yeast strains
    Erg27p
    Erg7p
    Opis:
    A comparative study on post-squalene sterol synthesis in intact yeast cells and spheroplasts was carried out with strains from three genera (Saccharomyces cerevisiae, Schizosaccharomyces pombe, Pichia pastoris) as well as with engineered S. cerevisiae cells altered in regard to the late ergosterol synthesis pathway. A common outcome of incubation experiments with radioactive acetate was that in intact cells the metabolic pathway flows till its specific end product (ergosterol and its precursor, depending on the enzyme deficiency), whereas in spheroplasts the pathway was stalled some step upstream. For example, in spheroplasts from wt strains, non-cyclic triterpenes squalene and oxidosqualene accumulated as though the metabolic path was kept from producing steroid-shaped molecules different from the end product. Accumulation of non-cyclic triterpenes was observed also in spheroplasts from S. cerevisiae cells lacking 3-ketosteroid reductase activity, an enzyme belonging to the C4-demethylase complex. When production of cyclic triterpenes was compromised by loss or poor functionality of oxidosqualene cyclase (EC 5.4.99.7), the difference between intact cells and spheroplasts was still remarkable, yet limited to the different oxido/dioxidosqualene ratio. The characteristics of spheroplasts as non-proliferating cells may partially explain the observed differences in post-squalene pathway from intact cells. We cannot say if the difference in metabolic pathways in spheroplasts and intact cells is a rule. We think, however, that it is worthwhile to search for an answer, as a wider picture of the points where the metabolic pathways are stalled in spheroplasts could provide original ideas about the metabolic network in yeast.
    Źródło:
    Acta Biochimica Polonica; 2016, 63, 2; 371-375
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie ultradźwięków w procesach dezintegracji
    Application of ultrasound in disintegration processes
    Autorzy:
    Bałdyga, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2072515.pdf
    Data publikacji:
    2013
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    CFD
    dezintegracja komórek drożdży
    dezintegracja agregatów krzemionki
    sonikacja
    ultradźwięki
    agglomerate disruption
    yeast cell disruption
    sonication
    ultrasounds
    Opis:
    Praca dotyczy dezintegracji przy użyciu ultradźwięków cząstek zawartych w zawiesinie w tzw. procesie sonikacji. Efekty praktycznego korzystania z sonikacji w procesach dezintegracji przedstawiono na przykładach dyspersji aglomeratów Aerosilu i dezintegracji komórek drożdży. Porównanie danych eksperymentalnych z wynikami symulacji wymagało przeprowadzenia obliczeń CFD. Przedstawione rezultaty potwierdzają użyteczność modelowania dla prawidłowego projektowania procesów dyspersji metodą sonikacji.
    Ultrasonic cell and agglomerate disruption is investigated experimentally and numerically. The CFD modeling is applied to predict spatial distribution of acoustic pressure in the system equipped with ultrasonic disintegrator. Examples for disintegration by ultrasounds are presented for yeast cells and silica agglomerates. Comparison of model predictions with experimental data shows that numerical methods are helpful for interpretation and design of sonication processes.
    Źródło:
    Inżynieria i Aparatura Chemiczna; 2013, 3; 144--146
    0368-0827
    Pojawia się w:
    Inżynieria i Aparatura Chemiczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gastric secretion and the pathogenesis of peptic ulcer in the Helicobacter pylori infection
    Autorzy:
    Konturek, P C
    Konturek, J.W.
    Konturek, S.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/69870.pdf
    Data publikacji:
    1996
    Wydawca:
    Polskie Towarzystwo Fizjologiczne
    Tematy:
    gastric microbiology
    pathogenesis
    infection
    gastric washing
    Campylobacter
    gastric acid
    peptic ulcer
    muscle fibre
    dog
    gastric secretion
    stomach
    leucocyte
    Vibrio rugula
    gastrointestinal tract
    cat
    mice
    epithelial cell
    Pseudomonas aeruginosa
    duodenal ulcer
    gastric mucosa
    gastric pathology
    Helicobacter pylori
    gastric milieu
    mouse
    spiral bacteria
    yeast cell
    Źródło:
    Journal of Physiology and Pharmacology; 1996, 47, 1
    0867-5910
    Pojawia się w:
    Journal of Physiology and Pharmacology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Relationship between the replicative age and cell volume in Saccharomyces cerevisiae
    Autorzy:
    Zadrag, Renata
    Kwolek-Mirek, Magdalena
    Bartosz, Grzegorz
    Bilinski, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/1041168.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    replicative aging
    Saccharomyces cerevisiae
    cell volume
    yeast
    Opis:
    Reaching the limit of cell divisions, a phenomenon referred to as replicative aging, of the yeast Saccharomyces cerevisiae involves a progressive increase in the cell volume. However, the exact relationship between the number of cell divisions accomplished (replicative age), the potential for further divisions and yeast cell volume has not been investigated thoroughly. In this study an increase of the yeast cell volume was achieved by treatment with pheromone α for up to 18 h. Plotting the number of cell divisions (replicative life span) of the pheromone-treated cells as a function of the cell volume attained during the treatment showed an inverse linear relationship. An analogous inverse relationship between the initial cell volume and replicative life span was found for the progeny of the pheromone-treated yeast. This phenomenon indicates that attaining an excessive volume may be a factor contributing to the limitation of cellular divisions of yeast cells.
    Źródło:
    Acta Biochimica Polonica; 2006, 53, 4; 747-751
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hypothesis: cell volume limits cell divisions
    Autorzy:
    Biliński, Tomasz
    Bartosz, Grzegorz
    Powiązania:
    https://bibliotekanauki.pl/articles/1041184.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    replicative aging
    Saccharomyces cerevisiae
    cell volume
    yeast
    Opis:
    Mammalian somatic cells and also cells of the yeast Saccharomyces cerevisiae are capable of undergoing a limited number of divisions. Reaching the division limit is referred to, apparently not very fortunately, as replicative aging. A common feature of S. cerevisiae cells and fibroblasts approaching the limit of cell divisions in vitro is attaining giant volumes. In yeast cells this phenomenon is an inevitable consequence of budding so it is not causally related to aging. Therefore, reaching a critically large cell volume may underlie the limit of cell divisions. A similar phenomenon may limit the number of cell divisions of cultured mammalian cells. The term replicative (generative) aging may be therefore illegitimate.
    Źródło:
    Acta Biochimica Polonica; 2006, 53, 4; 833-835
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Immobilization of permeabilized cells of baker’s yeast for decomposition of H2O2 by catalase
    Autorzy:
    Trawczyńska, Ilona
    Powiązania:
    https://bibliotekanauki.pl/articles/778357.pdf
    Data publikacji:
    2019
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    cell permeabilization
    baker’s yeast
    hydrogen peroxide
    immobilization
    biocatalyst
    Opis:
    Permeabilization is one of the effective tools, used to increase the accessibility of intracellular enzymes. Immobilization is one of the best approaches to reuse the enzyme. Present investigation use both techniques to obtain a biocatalyst with high catalase activity. At the beginning the isopropyl alcohol was used to permeabilize cells of baker’s yeast in order to maximize the catalase activity within the treated cells. Afterwards the permeabilized cells were immobilized in calcium alginate beads and this biocatalyst was used for the degradation of hydrogen peroxide to oxygen and water. The optimal sodium alginate concentration and cell mass concentration for immobilization process were determined. The temperature and pH for maximum decomposition of hydrogen peroxide were assigned and are 20°C and 7 respectively. Prepared biocatalyst allowed 3.35-times faster decomposition as compared to alginate beads with non permeabilized cells. The immobilized biocatalyst lost ca. 30% activity after ten cycles of repeated use in batch operations. Each cycles duration was 10 minutes. Permeabilization and subsequent immobilization of the yeast cells allowed them to be transformed into biocatalysts with an enhanced catalase activity, which can be successfully used to decompose hydrogen peroxide.
    Źródło:
    Polish Journal of Chemical Technology; 2019, 21, 2; 59-63
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of sonication reactor geometry on cell disruption and protein release from yeast cells
    Autorzy:
    Bałdyga, J.
    Jasińska, M.
    Dzięgielewska, M.
    Żochowska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/950394.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cell disruption
    protein release
    Saccharomyces cerevisiae ultrasonication yeast
    dezintegracja komórek
    uwalnianie białka
    drożdże
    Opis:
    The measured rate of release of intercellular protein from yeast cells by ultrasonication was applied for evaluating the effects of sonication reactor geometry on cell disruption rate and for validation of the simulation method. Disintegration of two strains of Saccharomyces cerevisiae has been investigated experimentally using a batch sonication reactor equipped with a horn type sonicator and an ultrasonic processor operating at the ultrasound frequency of 20 kHz. The results have shown that the rate of release of protein is directly proportional to the frequency of the emitter surface and the square of the amplitude of oscillations and strongly depends on the sonication reactor geometry. The model based on the Helmholtz equation has been used to predict spatial distribution of acoustic pressure in the sonication reactor. Effects of suspension volume, horn tip position, vessel diameter and amplitude of ultrasound waves on the spatial distribution of pressure amplitude have been simulated. A strong correlation between the rate of protein release and the magnitude of acoustic pressure and its spatial distribution has been observed. This shows that modeling of acoustic pressure is useful for optimization of sonication reactor geometry.
    Źródło:
    Chemical and Process Engineering; 2018, 39, 4; 475--489
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microbial Fuel Cell With Cu-B Cathode Powering With Wastewater From Yeast Production
    Autorzy:
    Włodarczyk, B.
    Włodarczyk, P. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/124258.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    microbial fuel cell
    cathode
    wastewater treatment
    yeast industry
    renewable energy sources
    environment engineering
    Opis:
    With the increasing standard of living, energy consumption increases as well. So, waste production, including wastewater, increases as well. One of the types of wastewater is wastewater from yeast industry. Wastewater from this industry has not only a high pollutants load but it is produced in great amounts as well. Technical devices that can accomplish the wastewater treatment and electricity production from wastewater is a microbial fuel cell. In microbial fuel cells activated sludge bacteria can be used for electricity production during wastewater treatment. The possibility of using the Cu-B alloy as cathode catalyst for microbial fuel cells to wastewater treatment of wastewater from yeast industry is presented in this paper. The reduction time for COD with the use of microbial fuel cell with the Cu-B catalyst (with 5, 10 and 15% amount of B) is similar to the reduction time with aeration. The obtained power (4.1 mW) and the amount of energy (0.93 Wh) are low. But, if one can accept a longer COD reduction time, the obtained amount of energy will allow elimination of the energy needed for reactor aeration.
    Źródło:
    Journal of Ecological Engineering; 2017, 18, 4; 224-230
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of powering the microbial fuel cell with various kinds of wastewater
    Autorzy:
    Włodarczyk, Barbara
    Włodarczyk, Paweł P.
    Powiązania:
    https://bibliotekanauki.pl/articles/100985.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
    Tematy:
    microbial fuel cell
    wastewater treatment
    environmental engineering
    renewable energy sources
    clean technology
    process yeast wastewater
    Opis:
    The possibility to combine wastewater treatment and electricity production can accomplish a microbial fuel cell. Microbial fuel cells use glucose from wastewater as a fuel. In recent years, both production of municipal and industry wastewater increases very much. Municipal wastewater is directed to the wastewater treatment plant. While industry wastewater can be use as a fertilizer. But, both municipal and industry wastewater can be used in the microbial fuel cells. The comparison of powering the microbial fuel cell with municipal and process wastewater from yeast production is presented in this paper. The measurements covered comparison of changes in the concentration of COD in the reactor without aeration, with aeration and with using a microbial fuel cell (powered with municipal and industry wastewater). The results of measurements of COD showed no differences between the microbial fuel cell powered with municipal wastewater and the microbial fuel cell powered with process yeast wastewater. But, the power output is higher with using process yeast wastewater to powering the microbial fuel cell.
    Źródło:
    Infrastruktura i Ekologia Terenów Wiejskich; 2019, II/1; 131-140
    1732-5587
    Pojawia się w:
    Infrastruktura i Ekologia Terenów Wiejskich
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Progress of medically-related biotechnology in the post-genomic era
    Autorzy:
    Kozlowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/80941.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Arabidopsis
    biotechnology
    copy number variation
    enormous progress
    eukaryote
    genetic marker
    genome
    medical biotechnology
    metagenome
    microarray technology
    nematode
    non-coding RNA
    stem cell
    yeast
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2011, 92, 1
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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