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Search Results: 1 - 10 of 316 matches for " Danuta Schymura "
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Antennal expression pattern of two olfactory receptors and an odorant binding protein implicated in host odor detection by the malaria vector Anopheles gambiae
Danuta Schymura, Maike Forstner, Anna Schultze, Thomas Kr?ber, Luc Swevers, Kostas Iatrou, Jürgen Krieger
International Journal of Biological Sciences , 2010,
Abstract: Odor-detection in the malaria mosquito Anopheles gambiae involves large families of diverse proteins, including multiple odorant binding proteins (AgOBPs) and olfactory receptors (AgORs). The receptors AgOR1 and AgOR2, as well as the binding protein AgOBP1, have been implicated in the recognition of human host odors. In this study, we have explored the expression of these olfactory proteins, as well as the ubiquitous odorant receptor heteromerization partner AgOR7, in the thirteen flagellomeres (segments) of female and male antenna. Expressing cells were visualized by adapting a whole mount fluorescence in situ hybridization method. In female mosquitoes, AgOR1-expressing olfactory receptor neurons (ORNs) were almost exclusively segregated in segments 3 to 9, whereas AgOR2-expressing ORNs were distributed over flagellomeres 2 to 13. Different individuals comprised a similar number of cells expressing a distinct AgOR type, although their antennal topography and number per flagellomere varied. AgOBP1-expressing support cells were present in segments 3 to 13 of the female antenna, with increasing numbers towards the distal end. In male mosquitoes, total numbers of AgOR- and AgOBP1-expressing cells were much lower. While AgOR2-expressing cells were found on both terminal flagellomeres, AgOR1 cells were restricted to the most distal segment. High densities of AgOBP1-expressing cells were identified in segment 13, whereas segment 12 comprised very few. Altogether, the results demonstrate that both sexes express the two olfactory receptor types as well as the binding protein AgOBP1 but there is a significant sexual dimorphism concerning the number and distribution of these cells. This may suggest gender-specific differences in the ability to detect distinct odorants, specifically human host-derived volatiles.
An upper bound on the volume of the symmetric difference of a body and a congruent copy
Daria Schymura
Mathematics , 2010,
Abstract: Let A be a bounded subset of IR^d. We give an upper bound on the volume of the symmetric difference of A and f(A) where f is a translation, a rotation, or the composition of both, a rigid motion. The volume is measured by the d-dimensional Hausdorff measure, which coincides with the Lebesgue measure for Lebesgue measurable sets. We bound the volume of the symmetric difference of A and f(A) in terms of the (d-1)-dimensional volume of the boundary of A and the maximal distance of a boundary point to its image under f. The boundary is measured by the (d-1)-dimensional Hausdorff measure, which matches the surface area for sufficiently nice sets. In the case of translations, our bound is sharp. In the case of rotations, we get a sharp bound under the assumption that the boundary is sufficiently nice. The motivation to study these bounds comes from shape matching. For two shapes A and B in IR^d and a class of transformations, the matching problem asks for a transformation f such that f(A) and B match optimally. The quality of the match is measured by some similarity measure, for instance the volume of overlap. Let A and B be bounded subsets of IR^d, and let F be the function that maps a rigid motion r to the volume of overlap of r(A) and B. Maximizing this function is a shape matching problem, and knowing that F is Lipschitz continuous helps to solve it. We apply our results to bound the difference |F(r) - F(s)| for rigid motions r,s that are close, implying that F is Lipschitz continuous for many metrics on the space of rigid motions. Depending on the metric, also a Lipschitz constant can be deduced from the bound.
Influence of Ageing with UV Radiation on Physicochemical Properties of Acrylic-Polyurethane Coatings  [PDF]
Danuta Kotnarowska
Journal of Surface Engineered Materials and Advanced Technology (JSEMAT) , 2018, DOI: 10.4236/jsemat.2018.84009
Abstract: Investigated systems of acrylic-polyurethane coatings consisted of three kinds of coatings: base coat (acrylic), intermediate (polyurethane) and top coat (acrylic); each made up of two layers. Mean thickness of the coating system was equal (145 ± 1) μm. In time of accelerated UV ageing, electromagnetic radiation was emitted of wave length in the range (300 - 400) nm which was progressively inducing a destruction of coatings chemical structure, especially photooxidation and photolysis of coating material. Carried out X-ray investigations revealed increased contents of oxygen in aged coatings due to their photooxidation which resulted in increased tendency of coating microfragments to chip off from surface layer with the ageing time flow. The hardness increase of UV aged coatings was also observed which intensified their surface layer brittleness. This contributed to their thickness decrease by more than 10% after 2016 h of ageing. Photodestruction of UV aged coatings was documented as well by characteristics obtained during investigations carried out with DMA method use. A noticeable physical destruction of the coatings was observed in the form of silver cracks, etchings and grooves in surface layer as well as craters extending also into interlayer. Processes of physical and chemical destruction undergoing in aged coatings influenced roughness profile change and coatings surface topography shaping. After 2016 h of UV ageing, the roughness parameters (Ra, Rz, Rt) increased several times. Long-lasting UV radiation influence on the surface of investigated acrylic-polyurethane coating systems contributed to their decorativeness loss. Microscopic examinations revealed colour change (yellowing) of blue pigment contained in polyurethane interlayer. Decline in coating gloss was also observed as the result of surface roughness increase.
Assessment of the Erosive Wear Kinetics of Epoxy Coatings Modified with Nanofillers  [PDF]
Danuta Kotnarowska, Micha? Przerwa
Journal of Surface Engineered Materials and Advanced Technology (JSEMAT) , 2013, DOI: 10.4236/jsemat.2013.31A013
Abstract:

The paper presents results of investigation on the erosive wear kinetics of epoxy coatings modified with alumina or silica nanoparticles. Natural weathering caused a decrease of their erosive wear resistance. After a 3-year natural weathering, highest erosive wear resistance showed the epoxy coating modified with alumina nanoparticles.

Solar ultraviolet-B exposure and cancer incidence and mortality in the United States, 1993–2002
Francis P Boscoe, Maria J Schymura
BMC Cancer , 2006, DOI: 10.1186/1471-2407-6-264
Abstract: We extend the analysis of this relationship to include cancer incidence as well as mortality, using higher quality and higher resolution data sets than have typically been available. Over three million incident cancer cases between 1998 and 2002 and three million cancer deaths between 1993 and 2002 in the continental United States were regressed against daily satellite-measured solar UV-B levels, adjusting for numerous confounders. Relative risks of reduced solar UV-B exposure were calculated for thirty-two different cancer sites.For non-Hispanic whites, an inverse relationship between solar UV-B exposure and cancer incidence and mortality was observed for ten sites: bladder, colon, Hodgkin lymphoma, myeloma, other biliary, prostate, rectum, stomach, uterus, and vulva. Weaker evidence of an inverse relationship was observed for six sites: breast, kidney, leukemia, non-Hodgkin lymphoma, pancreas, and small intestine. For three sites, inverse relationships were seen that varied markedly by sex: esophagus (stronger in males than females), gallbladder (stronger in females than males), and thyroid (only seen in females). No association was found for bone and joint, brain, larynx, liver, nasal cavity, ovary, soft tissue, male thyroid, and miscellaneous cancers. A positive association between solar UV-B exposure and cancer mortality and incidence was found for anus, cervix, oral cavity, melanoma, and other non-epithelial skin cancer.This paper adds to the mounting evidence for the influential role of solar UV-B exposure on cancer, particularly for some of the less-well studied digestive cancers. The relative risks for cancer incidence are similar to those for cancer mortality for most sites. For several sites (breast, colon, rectum, esophagus, other biliary, vulva), the relative risks of mortality are higher, possibly suggesting that the maintenance of adequate vitamin D levels is more critical for limiting tumor progression than for preventing tumor onset. Our findings ar
Probabilistic Matching of Planar Regions
Helmut Alt,Ludmila Scharf,Daria Schymura
Computer Science , 2009,
Abstract: We analyze a probabilistic algorithm for matching shapes modeled by planar regions under translations and rigid motions (rotation and translation). Given shapes $A$ and $B$, the algorithm computes a transformation $t$ such that with high probability the area of overlap of $t(A)$ and $B$ is close to maximal. In the case of polygons, we give a time bound that does not depend significantly on the number of vertices.
New Solid Phase Synthesis of Distamycin Analogues
Drozdowska Danuta
Molecules , 2011, DOI: 10.3390/molecules16043066
Abstract: A novel and straightforward solid phase synthesis of distamycin analogues containing benzene units has been developed.
Drozdowska D., New Solid Phase Synthesis of Distamycin Analogues. Molecules, 2011, 16, 3066-3076
Danuta Drozdowska
Molecules , 2011, DOI: 10.3390/molecules16075753
Abstract: The author wishes to make the following correction to this paper [1]: The correct author’s name is: Danuta Drozdowska.
Sheep market after Poland's EU accession
Danuta Zawadzka
Annales UMCS, Zootechnica , 2010, DOI: 10.2478/v10083-010-0006-x
Abstract: The sheep population in Poland has been decreasing for more than twenty years. Only the intensity of the process changes. Initially, after Poland's EU accession, this intensity was significantly weakened but now it once again starts to gain in force. Sheep farming development depends, inter alia, on the procurement price for live sheep. Due to the sheep export, which predominates production, these prices are not dependent on the demand and supply on the domestic market. The level of these prices is determined by several factors such as the exchange rate of PLN against euro, as well as the prices of sheep and lambs in the European Union. Strengthening PLN deteriorates the profitability of Polish export of sheep and sheep prices drop. In a reverse situation, i.e. when PLN weakens, the profitability of export increases and, in turn, the procurement prices of live sheep grow as well. Subsidies for farmers depend on the exchange rate of PLN against euro too. However, the influence of the subsidies is limited and it can be efficient in a specific market situation.
Curva nacional de distribución de peso al nacer según edad gestacional: Chile, 1993 a 2000 A national birth weight distribution curve according to gestational age in Chile from 1993 to 2000
Danuta Rajs
Revista médica de Chile , 2005,
Abstract:
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