Polycyclic aromatic hydrocarbons (PAHs) are significant pollutants found in petroleum products. There is ample literature on the biodegradation of PAHs containing less than five rings, but little has been done on those with more than five rings. Coronene (CRN), a seven-ring-containing PAH, has only been shown to be degraded by one bacterial strain. In this study, a bacterial strain 10SCRN4D was isolated through enrichment in the presence of CRN and 10% NaCl (w/v). Analysis of the 16S rRNA gene identified the strain as Halomonas caseinilytica. The strain was able to degrade CRN in media containing 16.5–165 μM CRN with a doubling time of 9–16 hours and grew in a wide range of salinity (0.5–10%, w/v) and temperature (30–50°C) with optimum conditions of pH 7, salinity 0.5%–10% (w/v), and temperature 37°C. Over 20 days, almost 35% of 16.5 μM CRN was degraded, reaching 76% degradation after 80 days as measured by gas chromatography. The strain was also able to degrade smaller molecular weight PAHs such as benzo[a]pyrene, pyrene, and phenanthrene. This is the first report of Halomonas caseinilytica degrading CRN as the sole carbon source in high salinity, and thus highlights the potential of this strain in bioremediation.

The aim of the study was to assess the profile of EC (elemental carbon) and OC (organic carbon) temperature fractions in PM1 and PM2.5 samples and in wet deposition samples (material collected on a filter). The research was conducted at the urban background station in Zabrze (southern Poland) in the period of Oct 2020–Oct 2021. PM samples were collected with high-volume samplers; the automatic precipitation collector NSA 181 by Eigenbrodt was used to collect the deposition samples. Concentrations of EC and OC were determined using thermal-optical method (carbon analyzer from Sunset Laboratory Inc., “eusaar_2” protocol). Regardless of the type of research material, organic carbon constituted the dominant part of the carbonaceous matter, and this dominance was more visible in the non-heating season. The profile of temperature fractions of OC and EC was clearly different for dust washed out by precipitation. Noteworthy is a much lower content of pyrolytic carbon (PC) in OC, which can be explained by the fact that PC is most often combined with the water soluble organic carbon. In addition, a high proportion of the OC3 fraction was observed, followed by OC4, which may indicate that these fractions are of a more regional origin. With regard to the EC fractions, the differences are less visible and concern, in particular, the higher share of EC4 and the lower EC2. The obtained results may be a valuable source of information about the actual status of the carbonaceous matter and its transformation in the atmosphere.

In this paper the new transformation of coordinates in three-dimensional space has been given. This transformation allows determination of the coordinates of the points in the new Cartesian coordinate system based on the reference point with known coordinates in initial Cartesian coordinate system.

The article presents a family of modified the so called general polynomial transition curves, determined with the purpose of being applied at the design of the grade line of roads. The designing conditions of those curves have been provided alongside detailed information on determination of particular designing parameters. The application methods of those curves in the process of the grade line designing, based upon economically justified minimization of earth works, have been presented as well.

The paper presents the method of robust estimation of variance coefficient. The concept of YRestimation presented in (6] is generalised in case of dependent observations. The basis of the method is usage of reinforcement matrix which guarantees the robustness of the estimate. The reinforcement matrix which is closely connected with the weight function of M-estimation, gives a possibility to perform robust adjustment. Thus such a method is also presented. At last, an example is shown too.

The article deals with the problem of application of the dynamic model of the geodetic control network in monitoring the subsidence of earthen structures. A tentative model of a control network coupled with a soil environment functioning model has been presented herein alongside an organization pattern of measuring and control works. Against such background the purposefulness of the use of the suggested algorithm in monitoring the condition of earthen structures has been discussed together with specification of the conditions that should be satisfied to make the use of the algorithm possible.

This paper presents a new method of measuring of small inclination angles. The method consists in application of a pendulum with a diaphragm coworking with an optoelectronical barrier. Results of studies of the constructed device are also presented, they focused on determination of drift of the measured inclination angles as well as variation of the period of the complete oscillation of the pendulum for positive and negative angles of inclination. Variation of mean errors of the studied magnitudes for all test measuring series were analyzed graphically.

The article is an extension of the suggestion published earlier on determination of the relative position of a point. Introduction of formulas to convert ortho-Cartesian coordinates of points to nondimensional numerical coefficients alongside reverse converting formulas is the main part of the thesis. The said formulas have been completed with demonstrative examples that verify the correctness thereof.

The article presents the putting into practice of a neural state estimator for navigational measurements. One of the basic problems of sea navigation is considered, which is the statistic working out of navigational measurements with the purpose of determining the estimated vector of the vessel's movement and position.

The article presents a family of the so called multinomial transition curves. It is possible to conveniently form the curvatures of those curves through appropriate choice of minimum radius of curve R, tangent gradient at starting point tgu0, and the abscissa of ending point xK, which affects the value of elementary design parameter C=Rtgu0/xK. The possibility to select C values from interval < 1/3; 2/3 > and the unusual position of the curves within the Cartesian coordinate system make them remarkably useful for example at designing road grade lines in order to accomplish optimum compatibility with the relief. The foregoing being borne in mind, the article presents appropriate methods of designing road grade line with the use of the said curves.

The article presents the elementary coordinate calculating formulas (simple and reverse problems) of the Gauss-Kruger projection in wide meridional zone. The formulas that make it possible to calculate the values oflocal area distortions and reductions of directions, angles and lengths, have been presented as well.

This paper presents an analysis of the space, known in the theory of reliability, of observational gross errors or blunders absolutely undetectable in the least-squares estimation process in linear Gauss-Markov models. The analysis is based on a general relationship linking the observational disturbances and a model response. Although the definition of this space is identical with that given by [l] it is arrived at in a slightly different way. Several properties of this space are formulated, one of them showing its connection with the reliability level of a model with uncorrelated observations. Although the linearized models are included in the theory, the approach applied to them, being basically a simple extension of that proposed for linear models, can not be considered as a complete proposal for practical purposes. The theory is illustrated with examples taken from engineering surveys.