Wyniki wyszukiwania - AGRO

1

Heterogeneity of the bovine brain glutathione-S-transferase

100%

Baranczyk-Kuzma A., Drobisz D.

Acta Biochimica Polonica

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1993

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tom 40

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nr 1

2

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Comparison of three techniques to assess surface heterogeneity of solids in soils

88%

Polubesova T. A., Pachepsky Y. A., Hajnos M., Jozefaciuk G., Sokolowska Z.

International Agrophysics

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1997

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tom 11

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nr 3

3

Heterogeneity of extraparenchymal primitive neuroectodermal tumours within the craniospinal axis

88%

Izycka-Swieszewska E., Kloc W., Plata-Nazar K., Stefanowicz J., Drozynska E., Wozniak A., Gasecki D., Debiec-Rychter M.

Folia Histochemica et Cytobiologica

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2004

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tom 42

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nr 4

4

The heterogeneity of cell subtypes from a primary culture of human amniotic fluid

75%

Zhang S., Geng H., Xie H., Wu Q., Ma X., Zhou J., Chen F.

Cellular and Molecular Biology Letters

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2010

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tom 15

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nr 3

424-439

Heterogeneous human amniotic fluid contains various cell types. Herein, we report on the possibility of simultaneously isolating three subtypes of cells from one primary culture. Using a stainless steel instrument named a colony poculum, two of the three cell subtypes could be efficiently cultured, and these were further characterized. The results indicated that these two cell subtypes had different morphologies and were characterized by different cell marker expression profiles, including the differential expression of CD105, CD117 and EBAF. Furthermore, their gene expression array data revealed their different gene expression profiles. Although both cell types expressed several embryonic stem cell-specific markers, they were non-tumorigenic in vivo. This paper not only provides new insight into the heterogeneity of human amniotic fluid, it also presents a simple yet efficient cell isolation method. These results will contribute to the thorough investigation of the properties and potential future applications of human amniotic fluid-derived cells.

5

Characterization of Staphylococcus epidermidis isolates cultured from patients with infected hip prostheses

75%

Bogut A., Niedzwiadek J., Strzelec-Nowak D., Plewik D., Mazurkiewicz T., Marczynski W., Olender A.

Health Problems of Civilization

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2018

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tom 12

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nr 2

Background. Coagulase negative staphylococci are at the forefront of etiologic agents of periprosthetic joint infections (PJIs). The purpose of the study was to characterise causative isolates (n=19) of Staphylococcus epidermidis (SE) – with emphasis on their phenotypic and genotypic heterogeneity. Material and methods. The isolates were cultured from multiple samples obtained perioperatively during revision surgery from 14 patients with clinically and/or microbiologically proven PJI. Phenotypic heterogeneity included variations of colony morphologies, drug resistance patterns and/or the capability of the biofilm formation and was verified by the DNA fingerprinting assay. Results. Phenotypic discrepancies were observed between isolates cultured from 5 patients (35.7%). The genotyping assay identified 3 pairs of isolates as unrelated; single pairs were genetically related and indistinguishable. The biofilm production was detected in 17 isolates, among which 5 (29.4%) were proficient biofilm formers harbouring the icaADBC genes. Additionally, one ica-positive isolate produced a moderate, protease-sensitive biofilm. The remaining isolates were moderate biofilm producers among which four developed protease-sensitive biofilms. Conclusions. The majority of PJIs are monoclonal; nevertheless, phenotypic diversity of SE is a frequent phenomenon which can complicate the diagnostic proceeding. Adherence ability is an important pathogenic trait of SE although the chemical composition of the resultant biofilm, its intensity and regulation of development can vary.

6

Morphological heterogeneity of dendritic cells in the rat thymus

75%

Jaroszewski J., Brelinska R.

Folia Morphologica

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1998

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tom 57

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nr 1

7

Surface heterogeneity effects in water vapour adsorption on clay minerals

75%

Sokolowska Z., Stawinski J., Sokolowski S.

International Agrophysics

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1992

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tom 06

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nr 3-4

8

Heterogeneity in the differentiation and function of CD8plus T cells

63%

Mittrucker H.-W., Visekruna A., Huber M.

Archivum Immunologiae et Therapiae Experimentalis

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2014

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tom 62

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nr 6

9

Gap regeneration in near-natural European beech forest stands in Central Bohemia - the role of heterogeneity and micro-habitat factors

63%

Bilek L., Remes J., Podrazsky V., Rozenbergar D., Diaci J., Zahradnik D.

Dendrobiology

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2014

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tom 71

Gap regeneration in a European beech (Fagus sylvatica L.) forest reserve was analyzed in relation to within-gap resource heterogeneity and ground vegetation competition. The study was carried out in two one-hectare permanent research plots (PRP) which included five smaller research plots (RP) encompassing two large gaps (500–700 m2), two small gaps (300–400 m2), and location under canopy. The coverage of woody regeneration, ground vegetation, dead wood, seedling density in eight height classes, characteristics of dominant trees of the beech regeneration, and the total thickness of holorganic horizons were measured. Soil moisture and light conditions were also assessed in selected sample plots. The relative direct and diffuse light was estimated by hemispherical photography. Small gaps showed both the highest cover of tree regeneration and the highest density of individuals per hectare. Slightly less regeneration was recorded in large gaps, while under closed canopy, regeneration densities were 5–10 times lower than in small gaps. Beech regeneration cover and the size (diameter and height) of dominant beech seedlings were positively related to relative diffuse light and negatively related to ground vegetation cover. The latter was positively related to diffuse light and soil moisture content. A pronounced statistically significant contrast in the cover and size of beech regeneration in relation to micro-site conditions (diffuse light, cover of graminoids) was only confirmed between sample plots located below canopy cover and those within gaps. Graminoids, in particular Calamagrostis epigejos L., occurred mainly in the large gap centre and along the southernmost edge of the large gap, increasing competition for resources here. The cumulative cover of ground vegetation and regeneration was relatively low (9–56%) compared with more mesic natural beech forests. The indicated negative influence of direct light at the northern gap edge suggests that extension of gaps on comparable sites in managed forest should not proceed in this direction.

10

Distribution and heterogeneity of heterochromatin in the European huchen (Hucho hucho Linnaeus, 1758) (Salmonidae)

63%

Kucinski M., Ocalewicz K., Fopp-Bayat D., Liszewski T., Furgala-Selezniow G., Jankun M.

Folia Biologica

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2014

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tom 62

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nr 2

11

Antioxidant protection against cosmic radiation-induced oxidative stress at commercial flight altitude

63%

Mitrea D. R., Mortazavi Moshkenanf H., Hoteiuc O. A., Bidian C., Toader A. M., Clichici S.

Journal of Physiology and Pharmacology

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2018

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tom 69

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nr 4

12

Heterogeneity of antibody response to mycobacterial antigens in different clinical manifestations of pulmonary tuberculosis

63%

Demkow U., Filewska M., Michalowska-Mitczuk D., Kus J., Jagodzinski J., Zielonka T., Zwolska Z., Wasik M., Rowinska-Zakrzewska E.

Journal of Physiology and Pharmacology. Supplement

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2007

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tom 58

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nr 5

13

Sequence heterogeneity of the envelope-like domain in cultivated allotetraploid Gossypium species and their diploid progenitors

63%

Hafez E. E., Abdel G. A. A., Paterson A. H., Zaki E. A.

Journal of Applied Genetics

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2009

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tom 50

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nr 1

17-23

Retroviral envelope (env)-like sequences in 2 cultivated allotetraploid cottons and their diploid progenitors have been identified and characterized in this study. DNA sequence analysis reveals that these sequences are heterogeneous. The observed sequence diversity, however, seems to preserve coding information. This is evidenced by the detection of the transmembrane domain (TM), which is the most conserved feature of the divergent retroviral env genes. The high ratio of synonymous to nonsynonymous changes suggests that these sequences are evolving under purifying selection. Phylogenetic analysis shows that Gossypium sequences closely cluster with a lineage of plant endogenous retroviruses that have an env-like gene. These results provide evidence for the antiquity and the wide diversity of env-like sequences in the Gossypium genome.

14

Grey Heron Ardea cinerea productivity in relation to habitat features and different spatial scales

63%

Manikowska-Slepowronska B., Slepowronski K., Jakubas D.

Polish Journal of Ecology

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2016

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tom 64

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nr 3

Life history traits of birds like survival or reproduction are strongly related to habitat features which affect food and nest-site availability. However, impact of habitat variables on life-history traits, which may be scale-dependent is barely studied. We investigated the relationships between landscape features and productivity (expressed as the number of 21–38 day old chicks per nest) of a colonial waterbird, the Grey Heron Ardea cinerea in northern Poland. In 2014 we analysed the landscape features (hydrographic features, habitat area, habitat patchiness and distances to the nearest water bodies, coastline, rivers/canals, buildings and roads) around the six colonies. We analysed all those features in four spatial scales around the colony: close proximity of the colony (0–1 km), closer foraging grounds (0–10 km), far foraging grounds (0–20 km) and far foraging grounds excluding close foraging areas and proximity of the colony (10–20 km). The differences in productivity among the colonies was not significant in the studied year (mean number of chicks ± SD: 3.57 ± 0.52). At each spatial scale excluding 10–20 km radius, Grey Heron productivity increased with increasing habitat heterogeneity and decreased with increasing length of rivers/canals and area of pastures. The results of this study indicate that the spatial scale of 0–10 km was the best to indicate relationships between landscape features and productivity in herons. Distance to the nearest river/canal banks, buildings and roads were related positively to productivity. Our study revealed the importance of landscape complexity of aquatic and terrestrial habitats for the Grey Heron productivity.

15

The slope aspect affects the heterogeneity and growth of ground vegetation in deciduous temperate forest

63%

Chmura D.

Polish Journal of Ecology

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2008

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tom 56

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nr 3

463-470

The species richness, H’ and D’ diversity and evenness J in southwestern- and northeastern-facing slopes were compared and height of twelve herbaceous plant species was measured five times during vegetation season in old-growth beech forest. The opposite slopes chosen for studies were similar in relation to slope inclination, type of soil, species composition and canopy cover. Two study plots 60 m2 encompassing two rows of 1- by 2-m 15 rectangular quadrates2 were established. The study revealed that northern slopes were characterized by significantly lower mean species diversity (H’ = 0.82; D’ = 0.47) compared to southern slopes (H’ = 1.2; D’ = 0.59), similar evenness (ca. J = 0.72) and higher heterogeneity with respect to spatial structure using Euclidean distance and range of DCA scores of quadrates of plots. Two-way ANOVA yielded significant differences of effect of slope aspect (P <0.001) and period of time (P <0.01) on average vegetation height. Nevertheless, interaction of time and aspect turned out to be insignificant. The highest mean values of height of plants were observed at the end of July and the end of June. Generally plants growing on north-facing slope were taller and had higher cover than those growing in southern sloped forest. This can be the result of lower species diversity on northeastern slope which favours development of individual species in conditions of weak interspecific competition and stronger intraspecific interactions.

16

The method of regional assessment of vehicles’ exploitation safety in conditions of heterogeneity of statistical variables

63%

Burski Z., Burski P., Burski A.

Teka Komisji Motoryzacji i Energetyki Rolnictwa

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2008

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tom 08a

17

Functional and structural heterogeneity of nucleoli: the dependence of the activity of transport of newly synthesized rRNA on nucleolar size and phase of the cell cycle

63%

Kwiatkowska M., Maszewski J.

Folia Histochemica et Cytobiologica

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1985

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tom 23

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nr 3

18

Heterogeneity among neutrophils

63%

Garley M., Jablonska E.

Archivum Immunologiae et Therapiae Experimentalis

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2018

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tom 66

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nr 1

19

Heterogeneity of methicillin-sensitive Staphylococcus pseudintermedius strains isolated from diseased dogs

63%

Garbacz K., Piechowicz L., Zarnowska S., Haras K., Dabrowska-Szponar M.

Polish Journal of Veterinary Sciences

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2011

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tom 14

|

nr 2

Thirty nine canine S. pseudintermedius strains were examined for antibiotic susceptibility and genetic polymorphisms. All strains were methicillin-sensitive S. pseudintermedius (MSSP). Resistance to penicillin was most prevalent (66.6%), followed by resistance to neomycin (56.4%), erythromycin (53.8%), clindamycin (48.7%), chloramphenicol (48.7%), and tetracycline (46.2%). Pulsed-field electrophoresis (PFGE) showed a high genetic polymorphism in the investigated strains.

20

The alpha and beta diversities in the fish assemblages of the Promissao Reservoir [SP-Brazil]: scales, complexities and ecotone heterogeneity

63%

Amaral B. D., Petrere M.,Jr.

International Journal of Ecohydrology and Hydrobiology

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2001

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tom 01

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nr 1-2

This paper characterizes the fish community and its interaction with different ecotones within the reservoir. The transformation of a river basin into a cascade of reservoirs produces new ecotones which interact differentially with the spatial\temporal distribution of fish species, their diversity, trophic structures, etc. So the variations of the fish fauna are described to understand better the practices of conservation and management of these reservoirs. The concepts of α and β diversities are related to the concepts of scale, complexity and heterogeneity. Scale comprises the longitudinal, horizontal and vertical variation which are represented by the complexity and heterogeneity of the fish community in the reservoir. Complexity exhibits the variations in ecological data interpretation according to environmental variability or type of data. Heterogeneity describes the variations in species assemblages related to different ecotones. The sampled ecotones were: forest, agricultural land, beaches and mouths of tributaries, each with three replications. Cluster analysis of the environmental factors revealed two distinct ecotonal groups: i) forest, agricultural land and beach; and ii) the tributary mouths. The ANOVAS indicated two possible patterns of α diversity: 1- heterogeneity within the fish community represented by number of species, and differences between the ecotones; 2- homogeneity within the fish community described by the biomass of different species. The β diversities were congruent with environmental factors giving evidence of the horizontal scale within the reservoir. The forest ecotones revealed higher heterogeneity in the coexistence of fish species than did the with other ecotones. This fact is explained by the littoral areas close to the forest fragments with more refuge, increasing the environmental structural diversity. So it reinforces the importance of the forest as refuge enhancing fish dispersal. The fish assemblages related to agricultural land and beaches were more similar. Agricultural land and pasture ware the dominant ecotone on the reservoir margins.

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