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The present work gives the results of the hydrobiological research of the middle course of the Bečva River in the river section between Valašské Meziříčí and Přerov, carried out in the years 2004 to 2007. Altogether, 65 taxa of macrozoobenthos were determined in the period 2000-2007 in the middle course of the Bečva River : Coelenterata (1 taxon), Oligochaeta (5 taxa), Hirudinea (3 taxa), Gastropoda (4 taxa), Isopoda (1 taxon), Amphipoda (2 taxa), Hydracarina (1? taxon), Ephemeroptera (7 taxa), Plecoptera (1 taxon), Odonata (3 taxa), Heteroptera (1 taxon), Megaloptera (1 taxon), Trichoptera (9 taxa), Coleoptera (3 taxa), Diptera (23 taxa). The number of zoobenthos taxa fell in the period 2004-2007 in comparison to period 2000-2002 from 51 taxa to 40 taxa. The decline of zoobenthos taxa was registered on study localities, as follows : Choryně (from 28 to 23 taxa), Hustopeče (from 27 to 25 taxa), Rybáře (from 35 to 28 taxa), Grymov (from 31 to 25 taxa). Average saprobity index of benthic community of the middle course of the Bečva River was 2.35. Average saprobity indices of monitored localities towards downstream were as follows: Choryně 2.41; Hustopeče 2.25; Rybáře 2.40; Grymov 2.34.

High quality and purity of DNA isolated from food and feed is essential for species identification and has unpredictable influences an effect of analysis. In this study, the efficiency of eight different methods for DNA isolation was investigated. For DNA extraction, the raw chicken meet, ham, sausages, tinned lunch meat, pate, tinned feeds for dogs, complete granulated feeds for dogs and chicken flour were used. Kits of several different producers, i.e.: NucleoSpin Food (Marchery-Nagel), Wizard Genomic DNA Purification Kit (Promega), Invisorb Spin Food Kit I (Invitek), Wizard SV Genomic DNA Purification System (Promega), JetQuick Tissue DNA Spin Kit (Genomed), RNA Blue (Top-Bio), JetQuick Blood & Cell Culture Kit (Genomed), QIAamp DNA Mini Kit and QIAamp DNA Blood Mini Kit (Qiagen) were employed in the study. Gel agarose electrophoresis for primary verification of DNA quality was performed. The isolates were subsequently assessed for quantity and quality using by spectrophotometer Nanodrop 2000 (Thermo Scientific). To verify of template usability and quality of isolated DNA, the polymerase chain reaction (PCR) was used.
Differences between isolated DNA from tinned products and meat, ham, sausage, granulated dog feed and chicken flour were found. In tinned food and feed, the DNA was more degraded, DNA content and DNA purity was lower and also PCR amplification was the most difficult. Overall DNA yield and quality have important influence on PCR products amplification. The best results were obtained with NucleoSpin Food and JetQuick Tissue DNA Spin Kit. DNA extracted by these methods proved highest yields, purity and template quality in all foods and feeds and the results of PCR analysis are excellent reproducible. Analyses showed that results depended on different food or feed using and different isolation system.
The results of this work will be utilized to choose the suitable isolating kit for educational course, which is designed for students and also for following research and analyses.

The orientation of the research work for the exploitation of the preventive tools for the decrease of biodegradable waste comes out from the requirements, which are reposed on Czech Republic as a valid member of European Union. The Czech Republic have to follow the legislative requirements, which are defined for the waste treatment, in this case it deals with the EC Landfill Directive (1999/31/ES). The directive undertakes for the EU members to limit the volume of the biodegradable waste on the landfills. The main sense of this restriction is to reduce the volume of the emitted gas, mainly methane, into atmosphere. Therefore, it was assigned the Waste Management Plan of the Czech republic, which states in the interest of the strategic goals (the decrease of the specific waste production independently on the level of the economic growth, the maximal waste exploitation as a reserve of the primary natural resources and the minimalization of negative impacts on human health and environment by the waste treatment) the goal achievement in its binding part, what's the decrease of maximal volume of the biodegradable municipal waste deposited in landfills, thus the rate of this element will be the most 75% weighted in 2010, the most 50 % weighted in 2013 and the most 35 % weighted from the total volume rised in 1995. One of the ways, how to achieve the required reduction of the waste volume deposited in the landfills, is consistent exercitation of the preventive methods and the sound agricultural and sound operating practice methods. The main goal of the work consists in creation of methodics for the make prognosis of the region development charging by the biodegradable waste in the preventive tool exploitation. I identified the typical sources of biodegradable waste and the key areas of their uprise after the evaluation of environmental gains of the selected preventive projects by the creation of methodics. After this manner of data acquirement, I proposed and defined the indicators, which serve for the creation of model database of environmental gains in the regional measure, especially collection area of landfill.

The paper evaluates seven years (1993-1999) of Soil organic matter supply monitoring in multifactor field trials conducted by the Agricultural Research Institute in Kroměříž, Czech Republic, (mean annual temperature 8.9 °C, total annual precipitation 599 mm, medium Luvi-Haplic Chernozem). The studied plots were a part of nine-crop rotation: alfalfa the 1^st and 2^nd year, winter wheat, spring barley, sugar beet, spring barley, winter wheat, silage maize and spring barley. The Soil organic matter supply was measured on four plots: winter wheat after spring barley (var. 1), winter wheat after alfalfa (var. 2), spring barley after winter wheat (var. 3) and spring barley after sugar beet (var. 4). Soil samples were taken from April to July (14-day period) from topsoil (0-30 cm) and subsoil (30-60 cm). The content of Soil organic matter was determined by wet oxidation. Using bulk density, the C content (%) was converted to C supply (t.ha^-1). Average yield (t.ha^-1) reached 6.54 t/ha (var. 1), 7.47 t/ha (var. 2), 6.52 t/ha (var. 3) and 7.20 t/ha (var. 4). Evaluation of the results was carried out by the analysis of variance and time changes by the second-degree regression analysis. Results demonstrated that Soil organic matter supplies were significantly changed in topsoil. The highest supplies were found in barley after sugar beet (118 t.ha^-1), the lowest ones in wheat after alfalfa (111 t.ha^-1). As for the cereal species generally, it was documented that in topsoils under barley the supplies were higher than under winter wheat. In subsoil, there were significant differences between wheat after alfalfa (111 t.ha^-1) and barley after wheat (104 t.ha^-1). As for a difference in the Soil organic matter supply in subsoil according to the cereal species the situation was contrary than in topsoil. Higher supplies were under wheat. Generally (topsoil and subsoil), the highest supply of Soil organic matter was in barley after sugar beet (224 t.ha^-1) and similarly in wheat after alfalfa (222 t.ha^-1). The smallest supply was in the variant of wheat after barley (217 t.ha^-1). In topsoil, the average supply of humus was 114 t.ha^-1 and that in subsoil was 107 t.ha^-1 the difference being statistically significant.

The study presents the results of research on the use of barley caryopses hardness for prediction of the malting quality. Grain hardness was determined by three methods: Particle size index (PSI), hardness according to Brabender (BRA) and grain milling energy (GME). The correlations among methods for determining the kernel hardness were estimated as well among selected technological traits of barley and malt and kernel hardness. Significant correlations were found among PSI values and Final attenuation of laboratory wort from malt (0.73*) a Glycidic extract (0.70*). Values of kernel hardness measured by BRA significantly correlated with Final attenuation of laboratory wort from malt (-0.80*) and Soluble nitrogen of malt (0.64*). Grain milling energy values were statistically significant correlated with Nitrogen content in malt (0.64*). The preliminary results confirmed the possibility to use kernel hardness for prediction of some malting quality traits. Further studies will be done on larger number of samples.

The most business entities in Europe are small or medium-sized enterprises (SME), which have a legal obligation to prepare financial statements in accordance with a set of accounting principles accepted in their country. Those statements are available to creditors, suppliers, and national governments but they could be badly understandable to creditors, suppliers and subjects in other countries. This is a great obstacle of their activities in the EU internal market. The existence of 27 different national accounting systems in the EU can be held for the most important obstacle.
There are many ways how to develop compatible accounting standards for SMEs but the most significant activity in this field is the research project of IASB (International Accounting Standards Board). IASB has developed IFRS (International Financial Reporting Standards). Even though IFRS are suitable for all enterprises, their application in case of SMEs would be very expensive and could significantly increase compliance costs of taxation. This development has not been finished yet and there are still some problems which need to be solved before the introduction of accounting standards to the public.
The research has shown that IFRS for SMEs should be used mainly by the entities which do not have public accountability - i.e. that its equities are not publicly traded and do not hold assets in a fiduciary capacity for a broad group of outsiders. This paper discusses those IFRS modifications, which should be done in case of SMEs.

Studies on the effect of ashes on maize were conducted as a pot experiment on mineral soil, to which between 13.33 and 800.0 g ash∙pot^-1 was added, corresponding to the doses of between 10 and 600 t∙ha^-1. The research aimed to learn the effect of diversified ash doses on the content, uptake and proportions between Fe, Co, Mn, Al and Si in maize. It was found that with increasing ash dose in soil were significantly increasing the concentration of Fe and Si in plants (Fe: 110.15-209.96 mg.kg^-1 d.m.; Si: 40.60-76.10 mg.kg^-1), whereas concentrations of Co, Mn and Al in maize were decreasing (Co: 0.30-0.11 mg.kg^-1 d.m.; Mn: 207.83-44.65 mg.kg^-1; Al: 300.09-179.80 mg.kg^-1 d.m). Higher contents of the studied elements were detected in maize roots than in its aboveground parts. Obtained yield of maize aboveground parts from the objects where solely ash was used as the substratum was characterized by the optimal content of Fe (104.61 mg.kg^-1 d.m.), but deficient concentration of Mn (29.69 mg.kg^-1 d.m.) and Co (0.01 mg.kg^-1 d.m.). In effect of growing ash doses in soil Fe:Co, Fe:Mn, Fe:Al and Mn:Co ratios were widening, whereas Fe:Si, Mn:Al, Mn:Si and Al:Si ratios were narrowing. Growing ash doses in soil influenced a decreased uptake of Co, Mn and Al and increased Si absorption by maize.

Lilac sage (Whorled sage), as one of the medicinal plants chosen as perspective for the recultivation of flowering meadows in the Czech Republic, was studied for the variability of its morphological characters, seed quality and content of essential oil. Seven particular populations of this genus were studied in the Czech Republic and there were found statistically significant differences in morphological characters (height and width of plants, length and width of leaves and length of inflorescences) but not in the content of the essential oil. Studied populations reached only between 0.028 and 0.072% of essential oil in dry mass and also the quality of seeds was found very low (germination between 0-52%) in the seeds from natural localities but this fact could be influenced by testing method.

The aim of this study was to determine the effect of a yeast culture (Saccharomyces cerevisiae CNCM I - 1077) addition in the diet of dairy cows on their rumen fermentation. Animals received a diet consisting of good maize silage with a higher dry matter content (18 kg), 6 kg of lucerne haylage, 5 kg of pea - silage, 3 kg of ensiled high moisture crimped corn, 1 kg of meadow hay, rape-cake 1 kg, brewer's grain silage 4 kg, and 8.0 kg feed mixture. The yeast culture was added to the mixture in the dose 2.8*10¹⁰ cfu/day and cow. The supplement of yeast culture showed a positive effect on ruminal VFA production by experimental group cows in comparison with control, higher production (P < 0.01) of acetic acid (58.50 ± 1.2583^b vs. 51.833 ± 2.409^a %), and lower production of propionic and butyric acid (24.667 ± 1.3744^a vs. 28.833 ± 1.863^b %). The average utilisation of ammonia was higher by cows in treated group (12.267 ± 0.754 mmol/L), but difference was not significant. The difference in number of protozoa of cows in the control and experimental groups was significant (P < 0.05) different (308.333 ± 24.390^a vs. 342.333 ± 10.9341^b ths /1 ml of rumen fluid).

The decision support systems commonly used in industry and economy managerial practice for optimizing the processes are based on algoritmization of the typical decision problems. In Czech forestry business, there is a lack of developed decision support systems, which could be easily used in daily practice. This stems from the fact, that the application of optimization methods is less successful in forestry decision making than in industry or economy due to inherent complexity of the forestry decision problems. There is worldwide ongoing research on optimization models applicable in forestry decision making, but the results are not globally applicable and moreover the cost of possibly arising software tools are indispensable. Especially small and medium forestry companies in Czech Republic can not afford such additional costs, although the results of optimization could positively influence not only the business itself but also the impact of forestry business on the environment. Hence there is a need for user friendly optimization models for forestry decision making in the area of Czech Republic, which could be easily solved in commonly available software, and whose results would be both, realistic and easily applicable in the daily decision making.
The aim of this paper is to develop the optimization model for the machinery use planning in Czech logging firm in such a way, that the results can be obtained using MS EXCEL. The goal is to identify the integer number of particular machines which should be outsourced for the next period, when the total cost minimization is required. The linear programming model is designed covering the typical restrictions on available machinery and total volume of trees to be cut and transported. The model offers additional result in the form of optimal employment of particular machines. The solution procedure is described in detail and the results obtained are discussed with respect to its applicability in practical forestry decision making. The possibility of extension of suggested model by including additional requirements is mentioned and the example for the wood manipulation requirement is shown.

The paper includes results of research work dealing with the study of the effect of mixing the traditional urea-formaldehyde adhesive Kronores CB 1100 D and the urea-formaldehyde adhesive Kronores CB 1200 D characterised by increased reactivity for selected physical and mechanical properties of particleboards, the content of free formaldehyde and productivity of the production line of particleboards. Within the research, other potential factors affecting properties of particleboards were also studied. Present adhesive prescriptions (1) and five experimental prescriptions were evaluated. In conclusion, optimum prescriptions were determined fulfilling the CSN EN 312 standard requirements for physical and mechanical properties of particleboards of P 2 class and a pressing factor was defined substantially affecting the rate of a production line or production productivity.

The paper presents the software procedure (using MAPLE 11) intended for considerable reduction of digital image data set to more easily treatable extent. The example with image of peach stone is presented. Peach stone, displayed on the digital photo, was represented as a polygon described by the coordinates of the pixels creating its perimeter. The photos taken in high resolution (and corresponding data sets) contain coordinates of thousands of pixels - polygon's vertexes. Presented approach substitutes this polygon by the new one, where smaller number of vertexes is used. The task is solved by use of adapted least squares method. The presented algorithm enables reduction of number of vertexes to 10 % of its original extent with acceptable accuracy +/- one pixel (distance between initial and final polygon). The procedure can be used for processing of similar types of 2D images and acceleration of following computations.

Series of the indentation of the ball (10 mm in diameter) by the constant speed into blocks of Edam cheese has been conducted. The indentation tests were performed at different speeds (1, 5, 10, 20 and 100 mm/min), and the corresponding force-displacement responses were fitted with an analytical solution to obtain the time-dependent constants and the instantaneous force-displacement response. The measurement has been performed for the cheeses of different stages of their maturity. The dependence of the indentation force on the penetration depth has been evaluated. This dependence can be fitted by a polynom. The indentation force decreases with cheese fat content. It increases with the loading rate. Its value also decreases with the time of the cheese ripening. The recently proposed method for the indenation of the ball into viscoelastic solids has been used for our data analysis. This procedure, which needs the use of the numeric methods, enables to obtain stress relaxation moduli, which describe the viscoelasticity of the tested materials. The obtained moduli describe the stage of the cheese maturity.

Besides agricultural primary production, the food industry and all other branches of the economy /services/ it is the information and communication technology used in retail that is one of the factors that markedly influence food retail. Therefore it is necessary to analyse the effect of electronic transactions that are used by food retail to attract and acquire other target groups of the consumers purchasing food. Though globally the retail companies (for ex. in Great Britain) invest in this technology heavily in order to increase their competitiveness on the market the food e-business in the Czech Republic has been more or less stagnating, though the recent years have been showing slight increase of interest in this form of shopping. This article identifies both the positive and the negative reasons of this situation. The technological level of computer network and its high accessibility proven by the fact that the vast majority of consumers can use internet for purchasing any kind of goods incl. food can be considered the positive reason. On the other hand the poor offer of food presented on the internet by retailers who - for fear of low demand for other kinds of food - focus mainly on beverages and dry food can be considered one of the negatives. The weakest point here is the timely delivery of goods in unchanged quality. Despite these facts the purchasing of food via internet can still serve well for busy or handicapped customers with limited mobility.

Risk management should ensure a company to be able to react to possible future situations in a good advance and through variant solutions. This should minimize both, a risk and possible negative risk consequences especially on trade and on a single existence of a company. Solution of negative consequences of risks is the one of important goals and of investigation of companies' management as well as of companies' owners. Submitted article presents the procedure of entities' risks selection for the purpose of their negative consequences covering by the means of insurance. This procedure has been elaborated by the author based on secondary research as well as on primary research. Author's primary research has been focused especially on observation and analysis of several tens of entities. The procedure presented in this article has been also fruitfully implemented in observed entities. The content of this article would become an asset of risk management as of the branch of science; it would be a benefit for insurance as for connected branch, and also for the sphere of management economics.

The paper is aimed at the evaluation of a relationship between the rate of investments and the rate of savings in selected Central European countries. A reference period for the analysis is 1995-2009. In all analysed Central European countries, the rate of investments permanently exceeded (but exceptions) the rate of savings in the period under investigation. Through fitting the development series of a calculated indicator as a difference of the rate of investments and the rate of savings in monitored countries by a polynomial of the second degree it was possible to compare developmental trends of this indicator in particular countries involved in this analysis. Polynomial trends of the difference indicator of the rate of investments and the rate of savings in Central European countries in the monitored period indicate similar developmental tendencies characterized (at the beginning of the reference period) by increasing the imbalance of the rate of investments and the rate of savings (on average until about 2003) and then by follow-up tendencies towards the gradual return to the balance. For the purpose of comparison, a difference was also monitored between the rate of investments and the rate of savings in EU15 countries as a whole, which permanently fluctuated around zero. The mean value of this indicator amounted to 0.11% for the period 1995-2009. Thus, in EU15 countries, the rate of investments roughly corresponded to the rate of savings (on a long-term basis). Based on this analysis, it follows that there is a correlation between the rate of investments and the rate of savings. Calculated parameters of particular regression functions are presented as Results in this paper. Indices of correlation and types of a regression function were calculated for particular countries. For the Czech Republic, these results are statistically highly significant using all three types of regression functions. In Poland, they can be indicated as statistically significant using the polynomial of the second and third degrees similarly as in Slovakia. In Hungary, already the use of a polynomial of the first degree results in statistically significant results. Using a polynomial of the third degree gives statistically highly significant results. The intertemporal analysis of investments and savings presented in this paper can be also used and developed as part of the problem of an intertemporal approach to the balance of payments.

In this experiment on three dairy cows with the ruminal and duodenal T-cannulas, the actual and predicted amino acid (AA) profiles of the protein fraction flowed to the small intestine were compared. The prediction was calculated by two methods: with the use of mean published AA profile of microbial protein and of experimentally determined one. The actual AA profile of digesta protein was corrected for glycine (Gly) of bile origin. In comparison to the published AA profile of microbial protein the use of the actual one did not contribute to an improvement of prediction accuracy (mean prediction error: 7.36 vs. 7.54 %, respectively). Inaccurate determination of AA composition of undegraded feed protein and the insufficient correction for Gly of bile origin were the probable sources of the residual variability.

This paper proposes an analysis of the possible means for eliminating risks due to liability for environmental damage caused by the actions of an operator whose activities potentially threaten the natural environment and may cause biodiversity damage. Risks are assessed with regard to risk insurability criteria for potential damage to the natural environment. The importance of risk management is stressed in the new form known as Enterprise Risk Management. Risk management is becoming increasingly important as part of the Solvency II concept, currently in preparation by European Commission, whose first and second pillars accent risk management in financial institutions and consistent quantification of existing, hidden and potential risks.
This paper focuses on an analysis of specific presumptions about the insurability of risk as concerns environmental insurance. The paper was written as part of research project MSM 6215648904, carried out by the Faculty of Business and Economics, under the name "The Czech Republic in the processes of integration and globalization, and the development of the agriculture and service sector in the new conditions of the integrated European market", following the goals and methodology of the research project.

Routine milk analyses using the efficient indirect infra-red method are important for the milk food chain quality. The reliability of the results depends on the calibration quality. It is important to use a relevant set of reference calibration samples (RCSs). RCSs with right range of values can be prepared using various methods. This paper was aimed to balance the impacts of dilution for decrease of main components in RCSs because of minimal change of matrix interference effects. Cow milk samples (MSs) were diluted (4/1) using distilled water, NaCl solution and a solution with specific composition (SC; because of disturbance in the balance of the milk matrix (NaCl 1.145; KCl 0.849; K₂HPO₄ 1.8463; citric acid 1.7; urea 0.3 g/l)) for reduction in main milk components. Fat (F), crude protein (CP), lactose (L), milk freezing point (MFP), osmolality (OS) and electrical conductivity (EC) were measured in all (original as well as modified) MSs. The lowest MFP and OS were in the original milk -0.5559 °C and 274.5 mOsmol/kg. The MFP was increased to -0.4369 °C and osmolality decreased to 217.83 mOsmol/kg by the addition of water. The MFP was decreased (-0.4903 °C) and returned to original milk value by the addition of NaCl solutin. MFP was -0.4788 °C due to SC addition. The decrease was less than for NaCl. The ability of other SC components (K₂HPO₄, KCl, citric acid and urea) to MFP decrease is less than for NaCl solution. EC was highest for NaCl set 4.69 mS/cm, EC for SC was 4.48 mS/cm (P < 0.001). The original MSs set showed EC 4.27 mS/cm. The SC was the nearest to original MSs in terms of total mineral composition. ECs for both modifications differed (P < 0.001) from original MSs. The procedure is applicable for balance of interference effects of milk matrix because of relevant calibration.

The Late Miocene forest was discovered in the opencast lignite mine of Bükkábrány which is situated in the foothills of the Bükk Mountains (NE Hungary). Sixteen stumps were exposed upright in 2007 at their original position. Five stumps were installed in the Ipolytarnóc Fossils Nature Reserve. They are identified in the present paper. The wood of one fossil trunk (No. 1) has been identified as Glyptostroboxylon rudolphii, which represents the wood of Glyptostrobus. Its main microscopic features are: visible growth rings, gradual transition between early- and late wood, rather small opposite bordered pits in 1-2 loosely spaced vertical rows with infrequent crassulae, uniseriate rays formed of procumbent cells without ray tracheids, 1-3 "glyptostroboid" cross-field pits per field and resin canals absent. The four remaining stumps (Nos. 2-5) have been identified as Taxodioxylon germanicum. Their main microscopic features are: growth rings, abrupt transition between early- and late wood, opposite bordered pits in 1-3 regular vertical rows with frequent crassulae, uniseriate rays formed of procumbent cells without ray tracheids, 1-3 taxodioid cross-field pits per field arranged mostly in one horizontal row, axial parenchyma both in early and late wood (diffuse arrangement) with smooth transverse end walls and resin canals absent. This species most probably represents the wood of Sequoia.

The goal of this article is to project the complex access to the analyses of sources of local flash-flood of watched watershed area of Moštěnka River. In article is used space modeling a space analysis. Consequently to assess the prepared built-technical arrangements and to project alternative, complement, not invasive arrangements. The article presents the fundamental results of applied research, which was in 2007 and 2008. The article shows, that the built-technical arrangements in combination with not invasive, organized arrangements markedly reduce fall-outs of flash-flood. The results was presented and devolved on the Department of landscape planning Kyjov town and to city managers of interested villages. The state ameliorative management, villages and farmers cooperation will be investors.

The objective of this work was to find an effective method of polyploidy induction using chemomutagens, colchicine and oryzalin, in diploid cultivar of Phlox paniculata 'Fujiyama' (syn. Mt. Fuji, Fuji). Ploidy level was determined by the flow cytometry method (FCM). Two methods of treating the explants (in vitro regenerated shoots) were tested; chemomutagen infiltration from nutrient media ("the infiltration method") and dipping of the explants in a chemical mutagen solution ("the dip method"). The highest values of tetraploid (5%), mixoploid (1.67%) frequency and polyploidization efficiency (1.25) were found in explants treated with 0.2% colchicine for 24 h in the dip method. Concentrations of 10 µM oryzalin and 0.2% colchicine for 14 d were the most effective for obtaining tetraploids in the infiltration method. The results will be exploited to other P. paniculata cultivars for breeding of this species.

The work is focused on quantification of influence of operation on flow properties of motorcycle engine oil. Three different kinds of synthetic engine oil (MOTUL) were tested, namely unused oil, run-in oil (650 km after engine reboring) and regular engine oil (6200 km of motorcycle operation). The samples were frozen to below zero temperatures and kinematic viscosity was continuously monitored in the range of -5 °C and +115 °C. Consequently, the kinematic viscosity at reference temperatures of 0, 40 and 100 °C was compared. Viscosity was measured by digital viscometer with concentric cylinders measuring geometry. The biggest difference occurred in case of lower temperatures where e.g. at 0 °C decrease to 29 % and 43 % of its original value was detected for used oil and run-in oil respectively. Flow behavior was modeled using several mathematical models -Arrhenius equation, exponential, and Gaussian equation. The best match between experimental and computed data was received in case of Gaussian fit with R² = 0.997 and 0.992 for run-in and used oil, respectively. The models are generally usable for description of rheological behavior of given engine oil.