44 research outputs found
Breeding raptors in Łagiewniki forest in 2009-2010
Three breeding species of raptors were observed in Łagiewnicki Forest in 2009-2010
(number of breeding pairs): Common Buzzard Buleo buteo (5-6 pairs), Goshawk Accipiter gentilis
(5 pairs), Sparrowhawk A ccipiter nisus (6 - 8 pairs). In the paper, the changes in raptor’s number
during last 50 years are described and possible reasons of the changes are discussed.Zadanie pt. „Digitalizacja i udostępnienie w Cyfrowym Repozytorium Uniwersytetu Łódzkiego kolekcji czasopism naukowych wydawanych przez Uniwersytet Łódzki” nr 885/P-DUN/2014 dofinansowane zostało ze środków MNiSW w ramach działalności upowszechniającej naukę
Measurement of Rotational Events in Regions Prone to Seismicity: A Review
On the basis of the explanation of rotational seismology as an area of study, a modern approach to the seismic rotation in various continuum models is summarized. The aim of this chapter is to formulate the fundamental requirements for rotational seismometer. Consequently, a review of all existing technologies of rotational seismometers including mechanical, electrochemical, magnetohydrodynamical, as well as optical type solutions is discussed. The analysis of their parameters that considers technical requirements enforced by rotational seismology has indicated an optical instrument using a Sagnac interferometer as the best solution. Fibre-Optic System for Rotational Events & phenomena Monitoring (FOSREM) with its main parameters and features is described as an example of such solution. Moreover, the example of rotational events recorded in Książ observatory, Poland, using mechanical rotational seismometers and FOSREM is presented. There are data for M = 3.8 earthquake near Jarocin, Poland on the 2012.01.06 at 15:37:56 at a distance of about 200 km from Książ. Although the used devices have totally different designs, the results obtained using FOSREM and the results calculated by mechanical devices show compatibility in rotational signals
Cytogenetic and molecular genotyping in the allotetraploid Festuca pratensis × Lolium perenne hybrids
Background: Species of the Festuca and Lolium genera, as well as intergeneric Festuca × Lolium (Festulolium)
hybrids, are valuable fodder and turf grasses for agricultural and amenity purposes worldwide. Festulolium hybrids
can merge in their genomes agronomically important characteristics. However, in polyploid plants, especially in
allopolyploids, the hybridization of divergent genomes could contribute to various abnormalities, such as variability
in chromosome number, structural rearrangements, and/or disorders in inheritance patterns. Here we studied these
issues in allotetraploid Festuca pratensis × Lolium perenne hybrids.
Results: Cytogenetic procedures, including fluorescent in situ hybridization, genomic in situ hybridization, and
molecular markers – inter-simple sequence repeats (ISSR) were exploited. This cytogenetic approach indicated the
dynamics in the number and distribution of ribosomal RNA genes and structural rearrangements for both parental
genomes (Festuca and Lolium) in hybrid karyotypes. The separate analysis of F. pratensis and L. perenne
chromosomes in hybrid plants (F2-F3 generations of F. pratensis × L. perenne) revealed the asymmetrical level of
rearrangements. Recognized structural changes were mainly located in the distal part of chromosome arms, and in
chromosomes bearing ribosomal DNA, they were more frequently mapped in arms without this sequence. Based on
the ISSR markers distribution, we found that the tetrasomic type of inheritance was characteristic for the majority of
ISSR loci, but the disomic type was also observed. Nonetheless, no preference in the transmission of either Festuca or
Lolium alleles to the following generations of allotetraploid F. pratensis × L. perenne hybrid was observed.
Conclusion: Our study reports cytogenetic and molecular genotyping of the F. pratensis × L. perenne hybrid and its
following F2-F3 progenies. The analysis of 137 allotetraploid F. pratensis × L. perenne hybrids revealed the higher level of
recombination in chromosomes derived from F. pratensis genome. The results of ISSR markers indicated a mixed model
of inheritance, which may be characteristic for these hybrids
Structural Analysis of the SANT/Myb Domain of FLASH and YARP Proteins and Their Complex with the C-Terminal Fragment of NPAT by NMR Spectroscopy and Computer Simulations
FLICE-associated huge protein (FLASH), Yin Yang 1-Associated Protein-Related Protein(YARP) and Nuclear Protein, Ataxia-Telangiectasia Locus (NPAT) localize to discrete nuclearstructures called histone locus bodies (HLBs) where they control various steps in histone geneexpression.Near the C-terminus, FLASH and YARP contain a highly homologous domainthat interacts with the C-terminal region of NPAT. Structural aspects of the FLASH–NPAT andYARP–NPAT complexes and their role in histone gene expression remain largely unknown. In thisstudy, we used multidimensional NMR spectroscopy andin silicomodeling to analyze the C-terminaldomain in FLASH and YARP in an unbound form and in a complex with the last 31 amino acidsof NPAT. Our results demonstrate that FLASH and YARP domains share the same fold of a tripleα-helical bundle that resembles the DNA binding domain of Myb transcriptional factors and theSANT domain found in chromatin-modifying and remodeling complexes. The NPAT peptide containsa singleα-helix that makes multiple contacts withα-helices I and III of the FLASH and YARP domains.Surprisingly, in spite of sharing a significant amino acid similarity, each domain likely binds NPATusing a unique network of interactions, yielding two distinct complexes.In silicomodeling suggeststhat both complexes are structurally compatible with DNA binding, raising the possibility that theymay function in identifying specific sequences within histone gene clusters, hence initiating theassembly of HLBs and regulating histone gene expression during cell cycle progression
The correlation of protein peroxidation with morphological changes in experimental oestradiol-induced carcinogenesis
Oestradiol-induced male Syrian hamster carcinogenesis is a well-known experimental
model of human cancer of the breast, ovary and uterus. The pathomechanism
postulated in this model is 4-hydroxylation of oestradiol and further
free radical formation. The same process is suspected in human breast cancer.
Dynamic changes in protein peroxidation were reported during the tumour induction.
In this paper we try to correlate the protein peroxidation markers with
the histopathological progression of the changes. The biochemical and histopathological
evaluations were performed after 1, 3, 6 and 9 months of the
hormone exposition. Significant protein peroxidation was observed as soon as
after 1 month and increased further until the 6th month. After 9 months however,
it was not significantly different from the control. The discrete histopathological
changes after 1 month, progressed into tubular and interstitial hyperplasias
after 3 and 6 months. After 9 months several dysplastic areas, sometimes
with features of carcinoma in situ, were observed. The severe 9-month histopathological
changes did not correlate with the protein peroxidation