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Selected physical and chemical properties for evaluating brown coals used for soil reclamation
J. Kwiatkowska,Z. Soko？…？？owska,A. Maciejewska
International Agrophysics , 2006,
Abstract: In this study some selected physical and chemical measurable parameters were determined and discussed. These parameters can be used for screening brown coals with respect to their suitability for soil reclamation purposes. Structural parameters, such as total cumulative volume, specific surface area, average pore radius, pore size distribution and total porosity were evaluated as a tool for the final selection of the suitable brown coal materials for reclamation purposes. The investigations were carried out using samples of brown coal from the opencast in Livno (Bosnia and Herzegovina) and brown coal material (BC1) from the Konin (Poland) deposit. Samples were taken from different depths to evaluate the effect of depth on the studied properties. Based on results of S, C, N, ash, humic acids contents, it can be stated that the brown coal from Livno (BC4) was the worst material to be used as a soil conditioner and/or for soil reclamation purposes. Brown coal samples from Livno were characterized by a very high acidity, thus in the case of their application for reclamation of soil contaminated with heavy metals, they have to be mixed with lime. The specific and bulk density of brown coal from Konin were lower than for brown coals from Livno. The structural parameters can be recommended as a tool for final selection of suitable brown coal materials for soil reclamation.
The submarine groundwater discharge as a carbon source to the Baltic Sea
B. Szymczycha,A. Maciejewska,A. Szczepanska,J. Pempkowiak
Biogeosciences Discussions , 2013, DOI: 10.5194/bgd-10-2069-2013
Abstract: Submarine Groundwater Discharge (SGD) is an important, yet poorly recognized pathway of material transport to the marine environment. This work reports on the results of dissolved inorganic carbon (DIC) and dissolved organic carbon (DOC) concentrations in the groundwater seeping to the Bay of Puck. The loads of carbon via SGD were quantified for the Baltic Sea sub-basins and the entire Baltic Sea. The annual averages of DIC and DOC concentrations in the groundwater were equal to 64.5 ± 10.0 mg C L 1 and 5.8 ± 0.9 mg C L 1. The DIC and DOC fluxes via SGD to the Baltic Sea were estimated at 283.6 ± 66.7 kt yr 1 and 25.5 ± 4.2 kt yr 1. The SGD derived carbon load to the Baltic Sea is an important component of carbon budget, which turns the status of the sea into firmly heterotrophic. The carbon load to the World Ocean, which was calculated basing on few reports on groundwater discharges and the measured carbon concentrations, amounts to- (142–155) × 103 kt yr 1 (DIC), and (13–14) × 103 kt yr 1 (DOC). The carbon flux via SGD amounts to some 25% of the riverine carbon load, and should be included into the World Ocean carbon budget.
The angiotensin converting enzyme gene i/d polymorphism in ellite polish and lithuanian judo players
P Cieszczyk,A Maciejewska,M Sawczuk,K Ficek
Biology of Sport , 2010,
Abstract: A common polymorphism in the angiotensin converting enzyme I gene (the ACE I/D variant) represents one of the first characterized and the most widely studied genetic variants in the context of elite athletes status and performance related traits. The aim of this study is to perform preliminary studies to analyze the possible importance of the ACE gene polymorphisms in elite Polish and Lithuanian judo players and sedentary individuals representing the possible relationships with genotype and physical performance. 28 male of elite Polish and Lithuania judo players were recruited for this study. For controls samples were prepared from 115 unrelated volunteers. DNA was extracted from the buccal cells donated by the subjects, and the PCR amplification of the polymorphic region of ACE gene contained either the insertion (I) or deletion (D) fragment was performed. Compared with sedentary controls, the frequency of I allele differ significantly from that found in judo player’s group: 60.7% vs. 44.3%(p=0.02) and ACE genotype frequency amongst the whole athletes group (28.6% II, 64.3% ID, 7.1% DD) was also different from expected values (control group 19.1% II, 50.4% ID, 30.4% DD; p=0.019). Our investigation have proved the ACE I/D allele could be one of the factors influencing the elite endurance exercise performance. The research suggests that those most predisposed to judo are individuals with the allele distribution in the ACE gene that is most significant with regard to the duration of a fight, and not with regard to the character of the performed moves, as could be supposed.
Phosphorylated ERK5/BMK1 transiently accumulates within division spindles in mouse oocytes and preimplantation embryos
Zuzanna Maciejewska,Aude Pascal,Jacek Z. Kubiak,Maria A. Ciemerych
Folia Histochemica et Cytobiologica , 2011, DOI: 10.5603/9450
Abstract: MAP kinases of the ERK family play important roles in oocyte maturation, fertilization, and early embryo development. The role of the signaling pathway involving ERK5 MAP kinase during meiotic and mitotic M-phase of the cell cycle is not well known. Here, we studied the localization of the phosphorylated, and thus potentially activated, form of ERK5 in mouse maturing oocytes and mitotically dividing early embryos. We show that phosphorylation/dephosphorylation, i.e. likely activation/inactivation of ERK5, correlates with M-phase progression. Phosphorylated form of ERK5 accumulates in division spindle of both meiotic and mitotic cells, and precisely co-localizes with spindle microtubules at metaphase. This localization changes drastically in the anaphase, when phospho-ERK5 completely disappears from microtubules and transits to the cytoplasmic granular, vesicle-like structures. In telophase oocytes it becomes incorporated into the midbody. Dynamic changes in the localization of phospho-ERK5 suggests that it may play an important role both in meiotic and mitotic division. (Folia Histochemica et Cytobiologica 2011, Vol. 49, No. 3, 528–534)
Pollen morphology of the Polish species of the family Caprifoliaceae. Part 1
Irmina Maciejewska
Acta Societatis Botanicorum Poloniae , 1997, DOI: 10.5586/asbp.1997.017
Abstract: This paper contains results of studies on pollen morphology of 5 Polish species of the family Caprifoliaceae (genera Sambucus and Viburnum). The pollen has been examined with LM and SEM. Besides detailed descriptions, series of microphotographs are presented. All examined species have small to medium-sized grains, with prolate polar axis, reticulate ornamentation (at least in mesocolpia), relatively long ectoapertures and with often visible equatorial bridges. Extent of fusion of capita in muri allows to divide observed pollen grains into 2 subtypes: one for examined Sambucus species and for V. opulus, the second for V. lantana.
Pollen morphology of the Polish species of the family Caprifoliaceae. Part 2
Irmina Maciejewska
Acta Societatis Botanicorum Poloniae , 1997, DOI: 10.5586/asbp.1997.018
Abstract: This paper presents further results of studies on pollen morphology of the family Caprifoliaceae. Besides detailed descriptions of 6 species of genera Linnaea and Lonicera, series of LM and SEM microphotographs are included. All examined species have pollen grains of medium- or large-sized, with oblate forms, echinate (microechinate) ornamentation and short ectoaperture, often margined by costa. Length of spines and density of their distribution on the tectum allow to distinguish Linnaea and Lonicera subtypes. The key for determination of 11 Caprifoliaceae species, based on pollen morphology is proposed too.
Discourse analysis as a tool for uncovering strengths in communicative practices of autistic individuals
Eliza Maciejewska
- , 2019, DOI: 10.1177/1461445619829237
Abstract: This article aims to show how discourse analysis can help identify and reinterpret the communicative practices of individuals with autism spectrum disorder, presenting them as co-constructed by the neurotypical interlocutor. The data described in the article come from three interviews with autistic adolescents. The participants completed two tasks: picture description and narrative production. The interviews were further analysed with the use of discourse analysis. The study demonstrates how the participants oriented to the interviewer’s utterances and what communicative strategies they used throughout the interview. Discourse analysis is presented as an approach to the study of autistic communication, which can substantially contribute to the current state of knowledge about autism spectrum disorder, and be an invaluable help for practitioners
Urban Airborne Lead: X-Ray Absorption Spectroscopy Establishes Soil as Dominant Source
Nicholas E. Pingitore, Juan W. Clague, Maria A. Amaya, Beata Maciejewska, Jesús J. Reynoso
PLOS ONE , 2009, DOI: 10.1371/journal.pone.0005019
Abstract: Background Despite the dramatic decrease in airborne lead over the past three decades, there are calls for regulatory limits on this potent pediatric neurotoxin lower even than the new (2008) US Environmental Protection Agency standard. To achieve further decreases in airborne lead, what sources would need to be decreased and what costs would ensue? Our aim was to identify and, if possible, quantify the major species (compounds) of lead in recent ambient airborne particulate matter collected in El Paso, TX, USA. Methodology/Principal Findings We used synchrotron-based XAFS (x-ray absorption fine structure) to identify and quantify the major Pb species. XAFS provides molecular-level structural information about a specific element in a bulk sample. Pb-humate is the dominant form of lead in contemporary El Paso air. Pb-humate is a stable, sorbed complex produced exclusively in the humus fraction of Pb-contaminated soils; it also is the major lead species in El Paso soils. Thus such soil must be the dominant source, and its resuspension into the air, the transfer process, providing lead particles to the local air. Conclusions/Significance Current industrial and commercial activity apparently is not a major source of airborne lead in El Paso, and presumably other locales that have eliminated such traditional sources as leaded gasoline. Instead, local contaminated soil, legacy of earlier anthropogenic Pb releases, serves as a long-term reservoir that gradually leaks particulate lead to the atmosphere. Given the difficulty and expense of large-scale soil remediation or removal, fugitive soil likely constrains a lower limit for airborne lead levels in many urban settings.
Numerical modelling of POC yearly dynamics in the southern Baltic under variable scenarios of nutrients, light and temperature
L. Dzierzbicka-Glowacka,K. Kuliński,A. Maciejewska,J. Jakacki
Ocean Science Discussions (OSD) , 2011, DOI: 10.5194/osd-8-675-2011
Abstract: This paper presents various scenarios of the particulate organic carbon (POC) in the southern Baltic Sea. The study is based on a one-dimensional Particulate Organic Carbon model (1-D POC). Mathematically, the pelagic variables of 1-D POC model are described by a second-order partial differential equations of the diffusion type with biogeochemical sources and sinks. The POC concentration is determined as the sum of phytoplankton, zooplankton and dead organic matter (detritus) concentrations. The temporal changes in the phytoplankton biomass are caused by primary production, mortality, grazing by zooplankton and sinking. The zooplankton biomass is affected by ingestion, excretion, faecal production, mortality, and carnivorous grazing. The changes in the pelagic detritus concentration are determined by input of: dead phytoplankton and zooplankton, natural mortality of predators, faecal pellets, and sinks: sedimentation, zooplankton grazing and biochemical decomposition. The 1-D POC model was used to simulate temporal dynamics of POC in the southern Baltic Sea (Gdansk Deep, Bornholm Deep and Gotland Deep) under scenarios characterized by different temperature, nutrients and light. Daily, monthly, seasonal and annual variabilities of POC in the upper water layer are presented for the different scenarios. The starting-point of the numerical simulations was assumed as average values of the investigated pelagic variables for 1965–1998 period. Two- to three-fold increases of POC concentrations in late spring were revealed as well as the shift towards postponed maximum POC concentration. It is speculated that, due to POC increase, oxygenation of under-halocline water layer will decrease, while supply of food to organisms from higher trophic level should increase.
FEM method with the use of Trefftz functions for determination of heat transfer coefficient in a minichannel
Piasecka Magdalena,Maciejewska Beata
EPJ Web of Conferences , 2012, DOI: 10.1051/epjconf/20122502022
Abstract: The paper presents the FEM method for determination of boiling heat transfer coefficient in cooling liquid flow in a rectangular minichannel with asymmetric heating. Experimental research has focused on the transition from single phase forced convection to nucleate boiling, i.e. the zone of boiling incipience. The “boiling front” location has been determined from the temperature distribution of the heated wall obtained from liquid crystal thermography. The main part of the test section has been a minichannel of pre-set depth from 0.7 to 2.0 mm, of different spatial orientations. Local values of heat transfer coefficient have been determined following the solution of the two-dimensional inverse heat transfer problem. This problem has been solved with the use of Trefftz functions. Trefftz functions have been used to construct base functions in the finite element method (FEMT).
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