scholarly journals Generalized P colonies with passive environment

2018 ◽  
Vol 724 ◽  
pp. 61-68
Author(s):  
Lucie Ciencialová ◽  
Luděk Cienciala ◽  
Petr Sosík
Keyword(s):  
P Colonies

P Colonies with Evolving Environment

2017 ◽  
pp. 151-164 ◽  
Author(s):  
Lucie Ciencialová ◽  
Luděk Cienciala ◽  
Petr Sosík
Keyword(s):  
P Colonies

scholarly journals Metallophores associated with Trichodesmium erythraeum colonies from the Gulf of Aqaba

Metallomics ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1547-1557 ◽  
Author(s):  
Martha Gledhill ◽  
Subhajit Basu ◽  
Yeala Shaked
Keyword(s):  
Microbial Population ◽  
Gulf Of Aqaba ◽  
Trichodesmium Erythraeum ◽  
P Colonies

Colonies of the marine diazotroph Trichodesmium host a complex microbial population. We show that colony consortia produce metallophores that likely influence the bioavailability of the trace nutrient iron within the colony microenvironment.

A class of restricted P colonies with string environment

2016 ◽  
Vol 15 (4) ◽  
pp. 541-549 ◽  
Author(s):  
Luděk Cienciala ◽  
Lucie Ciencialová ◽  
Erzsébet Csuhaj-Varjú
Keyword(s):  
P Colonies

P Colonies Processing Strings

2014 ◽  
Vol 134 (1-2) ◽  
pp. 51-65 ◽  
Author(s):  
Luděk Cienciala ◽  
Lucie Ciencialová ◽  
Erzsébet Csuhaj-Varjú
Keyword(s):  
P Colonies

scholarly journals Clonal analysis of the late stages of erythroleukemia induced by two distinct strains of Friend leukemia virus.

1981 ◽  
Vol 1 (8) ◽  
pp. 721-730 ◽  
Author(s):  
D Mager ◽  
M E MacDonald ◽  
I B Robson ◽  
T W Mak ◽  
A Bernstein
Keyword(s):  
Progenitor Cells ◽  
Cell Lines ◽  
Single Cells ◽  
Leukemia Virus ◽  
Significant Proportion ◽  
Erythroid Progenitor ◽  
Self Renewal ◽  
Friend Leukemia ◽  
P Colonies ◽  
Friend Leukemia Virus

We observed striking differences between the tumorigenic colony-forming cells present in the spleens of mice late after infection with the anemia-inducing strain of Friend leukemia virus (strain FV-A) and those present after infection with the polycythemia-inducing strain (strain FV-P). Cells within primary colonies derived from FV-A- and FV-P-transformed cells (CFU-FV-A and CFU-FV-P, respectively) contained hemoglobin and spectrin, indicating that the CFU-FV-A and CFU-FV-P were transformed erythroid progenitor cells. The proportion of cells containing hemoglobin was relatively high (> 25%) in newly isolated cell lines derived from CFU-FV-P colonies, whereas cell lines derived from CFU-FV-A colonies had only low levels (0 to 2%) of hemoglobin-containing cells. A high proportion of the cell lines derived from CFU-FV-A colonies responded to pure erythropoietin and accumulated spectrin and hemoglobin, whereas the cell lines derived from CFU-FV-P colonies did not. A cytogenetic analysis indicated that primary CFU-FV-P colony cells were diploid, whereas chromosomal aberrations were observed in the immediate progeny of CFU-FV-A. The presence of unique chromosomal markers in the majority of the cells within individual colonies derived from CFU-FV-A suggested that these colonies originated from single cells. Finally, leukemic progenitor cells transformed by strain FV-A appeared to have an extensive capacity to self-renew (i.e., form secondary colonies in methylcellulose), whereas a significant proportion of the corresponding cells transformed by strain FV-P did not. In addition, the self-renewal capacity of both CFU-FV-A and CFU-FV-P increased as the disease progressed. From these observations, we propose a model for the multistage nature of Friend disease; this model involves clonal evolution and expansion from a differentiating population with limited proliferative capacity to a population with a high capacity for self-renewal and proliferation.

scholarly journals Susceptibility of Bee Larvae to Chalkbrood in Relation to Hygienic Behaviour of Worker Bees in Colonies of Chosen Races of Honeybee (Apis Mellifera )

2014 ◽  
Vol 58 (1) ◽  
pp. 119-126 ◽  
Author(s):  
Beata Panasiuk ◽  
Małgorzata Bieńkowska ◽  
Dariusz Gerula ◽  
Paweł Węgrzynowicz
Keyword(s):  
Apis Mellifera ◽  
Correlation Coefficient ◽  
Field Conditions ◽  
Ascosphaera Apis ◽  
Hygienic Behaviour ◽  
Apis Mellifera Carnica ◽  
Apis Mellifera Mellifera ◽  
Apis Mellifera Caucasica ◽  
P Colonies ◽  
Bee Colonies

Abstract The susceptibility of bee larvae to Ascosphaera apis infestation and the hygienic behaviour of worker bees in relation to A. apis infected and freeze-killed brood were evaluated in three races of bees: Apis mellifera carnica, Apis mellifera caucasica, and Apis mellifera mellifera. Experimental bee colonies were evaluated in field conditions during the three beekeeping seasons. The lowest percentage of infected larvae was observed in car GR1 and mel A colonies (8.5% and 15%, respectively) and the highest in car Mr and cau P colonies (21% and 24.3%, respectively). Bees in the car GR1 and mel A colonies removed mummified brood in a shorter period of time (6.5 and 7.1 days on average, respectively) than car Mr and cau P colonies (above 8 days). Bees in the mel A and car GR1 colonies cleaned significantly more cells with freeze-killed brood within 24 and 48 hours (above 70% and 80% on average, respectively) than car Mr and cau P colonies (on average 10 - 20% lower cleaning rate). A low correlation coefficient was found for the susceptibility of larvae to A. apis infection and hygienic behaviour.

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