bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect Of Five Proteases Including Alcalase, Flavourzyme, Papain, Proteinase K And Trypsin On Antioxidative Activities Of Casein Hydrolysate From Goat Milk
Authors: Shu Guowei , Zhang Qian , Chen He , Wan Hongchang , Li Hong
Published: May 2018

Oxidation was related to the pathogenesis of human diseases. Adequate intake of antioxidant activity of food can reduce the levels of free radicals, prevent lipid peroxidation, and help the body against diseases. In the paper, casein from goat milk was hydrolyzed by five commercial proteases, namely, Alcalase, flavourzyme, papain, proteinase K and trypsin. The antioxidant activities of casein hydrolysates were assessed by evaluating hydrolysis degree, DPPH radical-scavenging activity, metal-chelating activity and superoxide radical scavenging activity. The results showed as follows: the DH of proteinase K, Alcalase, and trypsin were higher significantly than those of papain and flavourzyme. The Fe2+-chelation activity and superoxide radical scavenging activity of casein hydrolysates from goat milk by Alcalase was higher than the others, the DPPH scavenging activities of casein hydrolysates by Alcalase and papain was higher than the others and the DPPH scavenging activities by Alcalase and papain had no significant diffierence (p<0.05), so the optimal proteinase for hydrolysis casein from goat milk to produce antioxidant peptide was Alcalase.
Antimicrobial Effects Of The Ethanolic Extracts And Essential Oils Of Tanacetum Vulgare L From Romania
Authors: Mureşan Maria Lucia
Published: May 2018

This paper investigates the antimicrobial action of the extracts and essential oil of wildgrowing Tanacetum vulgare L on: Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa and Bacilus subtilis, using the diffusion disc method. The essential oils but also the ethanolic extracts tested exhibited moderate action on Staphilococcus aureus and Bacillus subtilis and low action on E. coli and Pseudomonas aeruginosa. The moderate antimicrobial activity is related to the amount of some chemical components of the essential oil of T. vulgare flos. Thus, this paper presents also the quantitative and qualitative analysis of the essential oils of T. vulgare harvested from two different habitats. The essential oils obtained by steam-distillation were analysed by gas-cromatography coupled with mass spectrometry (GC-MS).
Human Simulation in the Assembling and Disassembling Activities
Authors: Ghinea Rares Adrian , Popister Florin , Kiss Robert
Published: May 2018

The present paper proposes a simulation algorithm of the human operator in the assembly and disassembly operations. It is presented a methodology of simulation of the human operator’s in the virtual environment as well as the steps to allow identification of the variables of the simulation for an operation of assembly/disassembly/maintenance of a pneumatic valve. The time period of the tasks used in the simulation carried out in Delmia V5 are based on the time period that a real operator requires in order to complete these same tasks
Independent [1,2]-number versus independent domination number
Authors: Aleid Sahar A. , Mora Mercè , Puertas María Luz
Published: May 2018

A [1; 2]-set S in a graph G is a vertex subset such that every vertex not in S has at least one and at most two neighbors in it. If the additional requirement that the set be independent is added, the existence of such sets is not guaranteed in every graph. In this paper we provide local conditions, depending on the degree of vertices, for the existence of independent [1; 2]-sets in caterpillars. We also study the relationship between independent [1; 2]-sets and independent dominating sets in this graph class, that allows us to obtain an upper bound for the associated parameter, the independent [1; 2]-number, in terms of the independent domination number.
Square Roots of Real 3 × 3 Matrices vs. Quartic Polynomials with Real Zeros
Authors: Anghel Nicolae
Published: May 2018

Abstract There is an interesting analogy between the description of the real square roots of 3×3 matrices and the zeros of the (depressed) real quartic polynomials. This analogy, which in fact better explains the nature of the zeros of those polynomials, is unveiled through a natural use of the Cayley-Hamilton theorem.
Some Improvements of Hölder's Inequality on Time Scales
Authors: Dinu Cristian , Stancu Mihai , Dănciulescu Daniela
Published: May 2018

The theory and applications of dynamic derivatives on time scales have recently received considerable interest. In this paper, we define a function using the combined diamond- α integral, investigate its monotonicity and give some refinements for Hölder's inequality. We present some applications for ℤ and ℝ.
A note on generalization of Zermelo navigation problem on Riemannian manifolds with strong perturbation
Authors: Kopacz Piotr
Published: May 2018

We generalize the Zermelo navigation on Riemannian manifolds (M; h), admitting a space dependence of a ship's speed 0 < |u(x)|h ≤ 1 in the presence of a perturbation W̃ determined by a strong (critical) velocity vector field satisfying |W̃ (x)|h = |u(x)|h, with application of Finsler metric of Kropina type.
Positive bounded solutions for nonlinear polyharmonic problems in the unit ball
Authors: Mâagli Habib , Zine El Abidine Zagharide
Published: May 2018

In this paper, we study the existence of positive solutions for the following nonlinear polyharmonic equation (-∆)mu+λf(x, u) = 0 in B; subject to some boundary conditions, where m is a positive integer, λ is a nonnegative constant and B is the unit ball of ℝn (n ≥ 2). Under some appropriate assumptions on the nonnegative nonlinearity term f(x, u) and by using the Schäuder fixed point theorem, the existence of positive solutions is obtained. At last, examples are given for illustration.
On logarithmic residue of monogenic functions in a three-dimensional commutative algebra with one-dimensional radical
Authors: Pukhtaievych Roman , Plaksa Sergiy
Published: May 2018

We consider monogenic functions taking values in a three-dimensional commutative algebra A2 over the field of complex numbers with one- dimensional radical. We calculate the logarithmic residues of monogenic functions acting from a three-dimensional real subspace of A2 into A2. It is shown that the logarithmic residue depends not only on zeros and singular points of a function but also on points at which the function takes values in ideals of A2, and, in general case, is a hypercomplex number.
Bounds on the Third Order Hankel Determinant for Certain Subclasses of Analytic Functions
Authors: Vijayalakshmi S.P. , Sudharsan T.V. , Breaz Daniel , Subramanian K.G.
Published: May 2018

Let A be the class of analytic functions f(z) in the unit disc ∆ = {z ∈ C : |z| < 1g with the Taylor series expansion about the origin given by f(z) = z+ ∑n=2
∞ anzn, z ∈∆ : The focus of this paper is on deriving upper bounds for the third order Hankel determinant H3(1) for two new subclasses of A.
Landscape function analysis as a base of landscape visions
Authors: Filepné Kovács Krisztina , Valánszki István , Sallay Ágnes , Jombach Sándor , Mikházi Zsuzsanna , Kollányi László
Published: May 2018

An essential condition for the success of rural areas is the harmonious enforcement of ecologic, economic, and other educational, cultural, aesthetic goods/services of landscape, diversity of landscape functions. Landscape function analysis is a useful tool for the complex evaluation of rural regions. Using statistic and spatial data, we explored the landscape resources, potentials, and limitations of two pilot regions. But what about the future? Based on the landscape function analysis, we have defined special types of regions/landscape visions according to the long-term ability to retain population by the comparison of economic, production, and habitat value of the landscape.
If Development, Then Sustainability
Authors: Bóna Péter
Published: May 2018

The aim of this study is to explore how the effects of components belonging to the concept of strategic management system influence outstanding achievement and success in the processing industry in Hungary as well as the sustainability success component within that. In order to do that, the study defines the factors having an influence. Thereafter, it explains the successful operation of companies with the help of factors emerging via path analysis using regression models. It uses the balanced scorecard as a tool for success criteria describing success. This is a non-market aspect that has an impact on the whole system, making it of crucial importance. Via the exploration of effects, it can be shown the deliberate use of those factors that generate outstanding results and success from the point of view of sustainability, and thus internal development, customer appreciation, and financial success. By taking the results of the research into consideration, it will also be revealed that success factors in the processing industry in Hungary have the most direct and the largest impact on outstanding sustainability performance.
A Repression of Czechoslovak Citizens in the USSR
Authors: Hornik Jan
Published: May 2018

Around 30,000 citizens of pre-war Czechoslovakia were persecuted in the Soviet Union, at least 5.000 originated from Czech lands. One of the groups consist of the people who in the period of 1939-1942 sought refuge in the USSR from German or Hungarian Nazism, or who wanted to actively fight against it. They ended up in the Gulag, from which they were freed during an amnesty linked to the creation of a Czechoslovak unit in the USSR. Many were Czechoslovak Jews, including those who escaped from the Nazi concentration camp in Poland. Nisko, while thousands were inhabitants of Carpathian Ruthenia.
The sharp version of a strongly starlikeness condition
Authors: Engel Olga , Juma Abdul Rahman S.
Published: May 2018

In this paper we give the best form of a strongly starlikeness condition. Some consequences of this result are deduced. The basic tool of the research is the method of differential subordinations.
Extensional quotient coalgebras
Authors: Mavoungou Jean-Paul
Published: May 2018

Given an endofunctor F of an arbitrary category, any maximal element of the lattice of congruence relations on an F-coalgebra (A, a) is called a coatomic congruence relation on (A, a). Besides, a coatomic congruence relation K is said to be factor split if the canonical homomor-phism ν : AK → A
∇
A
splits, where ∇
A is the largest congruence relation on (A, a). Assuming that F is a covarietor which preserves regular monos, we prove under suitable assumptions on the underlying category that, every quotient coalgebra can be made extensional by taking the regular quotient of an F-coalgebra with respect to a coatomic and not factor split congruence relation or its largest congruence relation.
Sesquilinear version of numerical range and numerical radius
Authors: Moradi Hamid Reza , Omidvar Mohsen Erfanian , Dragomir Silvestru Sever , Khan Mohammad Saeed
Published: May 2018

In this paper by using the notion of sesquilinear form we introduce a new class of numerical range and numerical radius in normed space 𝒱, also its various characterizations are given. We apply our results to get some inequalities.
An explicit formula for derivative polynomials of the tangent function
Authors: Qi Feng , Guo Bai-Ni
Published: May 2018

In the paper, the authors derive an explicit formula for derivative polynomials of the tangent function, deduce an explicit formula for tangent numbers, pose an open problem about obtaining an alternative and explicit formula for derivative polynomials of the tangent function, and recommend some papers closely related to derivative polynomials of other elementary and applicable functions.
Alien and invasive species in plant communities of the Vistula and Brennica rivers gravel bars (Western Carpathians, Poland)
Authors: Wilczek Zbigniew , Chabowska Zuzanna , Zarzycki Wojciech
Published: May 2018

Gravel bars are the initial habitats, inseparably connected to the mountain streams. On the one hand, they are an unstable substrate, influenced by the overflows and high waters; however, they are also exposed to strong sunlight and heat. This situation determines specific vegetation which, due to dynamic changes in the habitat, has a pioneer character. What is more, gravel bars are areas where many river migratory species and many random species appear. Among them, there are also synanthropic species. In years 2011-2012, floristic and phytosociological studies were conducted in the Silesian Beskids. The goal of these studies was to recognize the vegetation of the gravel bars of the Vistula and the Brennica rivers - from their springs in the Silesian Beskids to the point where the Brennica River flows into the Vistula River in the Silesian Foothills. The studied section of the two rivers is regulated. Particular attention was paid to the synanthropic species that pose a threat to the native flora. In 9 recognized types of plant communities, 293 vascular plant species were recognized. More than 15% of the flora were alien species (45) and 22 of them were considered to be invasive. The most common invasive species that were spotted included: Impatiens glandulifera, Heracleum mantegazzianum and Reynoutria japonica. Plant communities with the biggest number and share of alien species were Plantago major-Barbarea vulgaris community and Phalaridetum arundinaceae.
Employers as Nightmare Readers: An Analysis of Ethical and Legal Concerns Regarding Employer-Employee Practices on SNS
Authors: Suder Seili , Siibak Andra
Published: May 2018

The aim of this interdisciplinary paper is to study the social reality surrounding the data processing practices employers and employees engage in on social networking sites (SNS). Considering the lack of empirical studies, as well as the considerable uncertainty in the way personal data protection is implemented across the European Union (EU), the paper offers insights on the topic. Qualitative text analysis of semi-structured interviews with employers from the service sector (N=10) and the field of media and communication (N=15), as well as employers from organisations which had experienced various problems due to things their employees had posted on social media (N=14), and employees from the financial sector (N=15) were carried out to explore whether the data protection principles, which can be viewed as the most important guidelines for employers in the EU, are actually followed in their everyday SNS data processing practices. Even though the data protection principles emphasise the need for fair, purposeful, transparent, minimal and accurate processing of personal data, our interviews with employers and employees reveal that the actual SNS processing practices rarely live up to the standards. Our findings indicate that there is a growing mismatch between the social reality and legal requirements regarding data subjects.
Optimization of the Sandwich Column with the Truss Core Which is Subjected to the Compressive Loading
Authors: Nikolić Ružica R. , Djoković Jelena M. , Bujňák Ján
Published: May 2018

The sandwich structures have multifold advantages with respect to other types of structures. Besides the architectural possibilities due to their appearance, those structures can carry the same or even higher loads than some other similar structures. Optimization of the sandwich columns with the truss core, subjected to the compressive axial load, is presented in this paper. The two types of optimization were performed: the three-parameter and the four-parameter optimization - the so called full optimization. The optimization of the column geometry (face thickness, core member height and core member diameter and core height) was performed, from the aspect of the minimal weight of the structure in terms of the load index. It was performed for four types of restrictions imposed by the corresponding column failure modes: column buckling, truss macro-buckling, local buckling of the face and face wrinkling. The tree-parameter optimization resulted in somewhat larger weight of the column than the full, four-parameter optimization.
Numerical Analysis of Effectiveness of Strengthening Concrete Slab in Tension of the Steel-Concrete Composite Beam Using Pretensioned CFRP Strips
Authors: Jankowiak Iwona , Madaj Arkadiusz
Published: May 2018

One of the methods to increase the load carrying capacity of the reinforced concrete (RC) structure is its strengthening by using carbon fiber (CFRP) strips. There are two methods of strengthening using CFRP strips - passive method and active method. In the passive method a strip is applied to the concrete surface without initial strains, unlike in the active method a strip is initially pretensioned before its application. In the case of a steel-concrete composite beam, strips may be used to strengthen the concrete slab located in the tension zone (in the parts of beams with negative bending moments). The finite element model has been developed and validated by experimental tests to evaluate the strengthening efficiency of the composite girder with pretensioned CFRP strips applied to concrete slab in its tension zone.
Ecological and Economic Aspects of the Application of Sewage Sludge in Energetic Plant Plantations - A Swot Analysis
Authors: Wójcik Marta , Stachowicz Feliks , Masłoń Adam
Published: May 2018

Sewage sludge management in Poland is a relatively new field of waste management called “in statu nascendi”, the standards of which have not been recognized yet. It also requires the implementation of new solutions in the field of sewage sludge. So far, the most popular method of sewage sludge utilization has been landfill disposal. In line with the restriction placed on landfill waste with a calorific value above 6 MJ/kg introduced on 1 January 2016, agricultural use and thermal methods are particularly applied. Municipal sewage sludge may be successfully used in the cultivation of energetic plant plantations. The aforementioned waste could be treated as an alternative to traditional mineral fertilizers, which in turn might successfully provide valuable nutrients for plants. This paper illustrates the SWOT analysis (Strengths, Weaknesses, Opportunities, and Threats) associated with the use of sewage sludge from Świlcza-Kamyszyn WTTP (Podkarpackie Province, Poland) for agricultural purposes. This analysis could be useful in evaluating the utility of sewage sludge in perennial plant plantations in order to determine the appropriate waste management strategies.
Treatment of peritoneal metastases from gastric carcinoma
Authors: Polkowski Wojciech P. , Rawicz-Pruszynski Karol , Mielko Jerzy , Geca Katarzyna , Skorzewska Magdalena , Cisel Bogumila
Published: May 2018

Patients with advanced gastric cancer and positive peritoneal cytology and/or peritoneal dissemination are deemed to be incurable and to hold dismal prognosis. So far, the only treatment option for these patients has been palliative systemic (chemo)therapy. However, for the last three decades, great progress has been made in attempts to treat (potential) peritoneal dissemination by means of complete cytoreductive surgery combined with hyperthermic intraperitoneal chemotherapy (HIPEC) after preoperative systemic therapy. This review is focused on the recent achievements of this multimodal strategy. Additionally, the review stands as background for the 4thInternational Conference “Advances in Surgical Oncology” that was held at the Medical University of Lublin (Poland) in November 2017, and dedicated to cytoreductive surgery and HIPEC for advanced gastric cancer.
Does additional HIPEC help after CRS in peritoneal disseminated gastric cancer?
Authors: Rau Beate , Pachmayr Eva , Klos Dusan , Thuss-Patience Peter , Brandl Andreas
Published: May 2018

The incidence of synchronous or metachronous peritoneal metastases (PM) in patients with locally advanced gastric cancer is high, and associated with a poor prognosis. The recommended therapeutic option for these patients is systemic chemotherapy and leads to a median of 7-8 months. However, new approaches like cytoreductive surgery and hyperthermic intraperitoneal chemotherapy might help to improve the median survival in selected patients.

Indications, patient selection and the choice of the chemotherapeutic agent are described in this manuscript, as well as an overview of the most recent literature about this topic.
Microbiological monitoring in patients with advanced ovarian cancer before and after cytoreductive surgery – a preliminary report
Authors: Szymankiewicz Maria , Koper Krzysztof , Dziobek Konrad , Kojs Zbigniew , Wicherek Lukasz
Published: May 2018

Multidrug-resistant organisms (MDROs) are becoming an increasing problem in hospitals. It is believed that screening patients for the incidence of MDROs prior to hospital admission not only allows for the proper management of infection following medical procedures, but can also potentially reduce the transmission of these bacteria to other patients.

The aim of this study was to assess the carriers of selected MDROs in the gastrointestinal tract among patients with advanced ovarian cancer admitted to the hospital for cytoreductive surgery and to estimate the possible relationship between rectal colonization with these organisms and nosocomial infections.

From December 2013 to May 2014, we evaluated the colonization with VRE (vancomycin-resistant Enterococcus), E. coli KPC+ (class A carbapenemase producing Escherichia coli), E. coli MBL+ (class B carbapenemase, metallo-ß lactamase producing Escherichia coli), and E. coli ESBL+ (extended-spectrum ß-lactamase producing Escherichia coli) in 42 patients. The patients were divided into two subgroups corresponding to the extent of their surgery: the first subgroup consisted of patients with large bowel resection (n=18) and the second subgroup of patients without resection (n=24). A rectal swab was taken within 24 hours of admission. Perioperative infectious complications were analyzed for the first 90 days following surgery with regard to the type of infection and the occurrence of examined MDROs.

In our study, 2.4 % of all patients (23.8/1,000 hospitalizations) were colonized with ESBL - producing Escherichia coli: 0.0 % in the first subgroup and 4.2% in the second subgroup, respectively. We did not identify any patients who were colonized with VRE, E. coli MBL+, or E. coli KPC+. Surgical site infections were seen in 8 (19.1%) out of 42 patients. We were, therefore, unable to confirm a relationship between MDROs colonizing the large bowel and the etiological agents of perioperative infections. However, despite the lack of identification of MDROs as etiological agents of postoperative infection, the risk of serious infectious complications, combined with the changing epidemiological situation, means that microbiological monitoring should be performed in patients with ovarian cancer before and after cytoreductive surgery.
Deformation induced topographic effects in inversion of temporal gravity changes: First look at Free Air and Bouguer terms
Authors: Vajda Peter , Zahorec Pavol Pavol , Papčo Juraj , Kubová Anna
Published: May 2018

We review here the gravitational effects on the temporal (time-lapse) gravity changes induced by the surface deformation (vertical displacements). We focus on two terms, one induced by the displacement of the benchmark (gravity station) in the ambient gravity field, and the other imposed by the attraction of the masses within the topographic deformation rind. The first term, coined often the Free Air Effect (FAE), is the product of the vertical gradient of gravity (VGG) and the vertical displacement of the benchmark. We examine the use of the vertical gradient of normal gravity, typically called the theoretical or normal Free Air Gradient (normal FAG), as a replacement for the true VGG in the FAE, as well as the contribution of the topography to the VGG. We compute a topographic correction to the normal FAG, to offer a better approximation of the VGG, and evaluate its size and shape (spatial behavior) for a volcanic study area selected as the Central Volcanic Complex (CVC) on Tenerife, where this correction reaches 77% of the normal FAG and varies rapidly with terrain. The second term, imposed by the attraction of the vertically displaced topo-masses, referred to here as the Topographic Deformation Effect (TDE) must be computed by numerical evaluation of the Newton volumetric integral. As the effect wanes off quickly with distance, a high resolution DEM is required for its evaluation. In practice this effect is often approximated by the planar or spherical Bouguer deformation effect (BDE). By a synthetic simulation at the CVC of Tenerife we show the difference between the rigorously evaluated TDE and its approximation by the planar BDE. The complete effect, coined here the Deformation Induced Topographic Effect (DITE) is the sum of FAE and TDE. Next we compare by means of synthetic simulations the DITE with two approximations of DITE typically used in practice: one amounting only to the first term in which the VGG is approximated by normal FAG, the other adopting a Bouguer corrected normal FAG (BCFAG).
Bioindication assessment of activated sludge Adaptation in a Lab-Scale Experiment
Authors: Babko Roman , Kuzmina Tatiana , Jaromin-Gleń Katarzyna , Bieganowski Andrzej
Published: May 2018

The adaptation of activated sludge from the Hajdow sewage treatment plant in a laboratory SBR was studied. The structure of the ciliate assembly was considered as a criterion. 32 ciliate species were found during the experiment. The composition and changes in the ciliate community structure during the process of activated sludge adaptation was examined. In the process of adaptation, reduction was observed in the number of ciliate species together with an increase in assembly total abundance. The decrease in the Shannon diversity index and equitability index in the adaptation process was observed. In the process of adaptation, two states of ciliate assembly were marked out - unstable transient period and stable period. During the transient period, reduction of ammonium utilization efficiency down to 50% and its subsequent increase up to 80% in the stable period were observed. In the transient period, the Simpson dominance index remained low but increased in the stable period. At a temperature of 10°C, the transient period lasted from six to nine days. After the stabilization process, the diversity of the ciliate assemblage remained at a lower level. Rarefaction methods showed that the number of potential ecological niches of ciliate amounted to 30 in the adaptation period, whereas there were only 15-20 ecological niches in adapted sludge.
Towards Methodological Problems of Trophic State Assessment of Running Waters
Authors: Neverova-Dziopak Elena , Kowalewski Zbigniew
Published: May 2018

Deep analysis of trophic state assessment methods has led to conclusion, that currently there is no universal methodology and existing methods are characterized by significant shortcomings. The approach proposed by the authors is different from generally used. Authors start from the assumption, that trophic state can be reflected by the state of biotic balance, which can be described by the values of Index of Trophic State. Researches were carried out in order to assess the trophic state of running waters and to estimate the limiting role of biogenic substances for eutrophication process development on the base of author's concept founded on above mentioned index.
In the shadow of urban development. Postwar depopulating towns in Poland, 1946-1990
Authors: Kantor-Pietraga Iwona
Published: May 2018

The article addresses the problem of depopulating towns in the postwar period (1946–1990) in Poland. The essence of this study is to highlight the problem rather neglected in scientific research on two levels – empirical and explanatory. In the article, a full inventory of towns, which recorded a decrease in population, in the period, was made on the basis of available statistical sources and relating studies on the issues of population. Due to short-term population swings, only the facts related to depopulation that took place in perspective of the designated research sub-periods were taken into consideration: 1946–1950, 1950–1960, 1960–1970, 1970–1980 and 1980–1990. The analysis was made on the basis of the contemporary administrative division of the country into provinces. The primary purpose of the article was an attempt to answer the question regarding the role of depopulation in the socialist period and the possible connotations of this fact, in relation to population loss reported presently in Polish towns. The starting point was, however, a detailed discussion of conditions of urban depopulation in the socialist period. It was recognized that the understanding of this genetically multifaceted problem should form the basis of interpretation to any generalizations made in relation to the past, present and future demographic changes in Poland and other countries. It was also found that understanding the facts connected with demographic development should be a canon of research conducted with reference to the analysed problems. The raised issue of demographic decrease in Polish towns during the socialist period, falls within such an explanatory model.
Congress Tourism As A Market Niche Of Business Tourism
Authors: Šušić Vukašin , Mojić Jovica
Published: May 2018

Congress tourism is a highly lucrative segment of the tourist offer, which usually happens outside the tourist season. The development of congress tourism requires the existence of high-quality congress tourism offer that will meet the needs of the participants and organizers of the conference. Participants in congresses are demanding guests, but also capable of payment, but they need to ensure all necessary preconditions for quality work, but also to adequately have free time. In this regard, the fundamental role of congress tourism is to promote tourism with well-organized system of promotional activities, continuing education, personnel, market research, application of quality standards etc. Congress tourism, and all the facilities are very important in the future tourism development in Serbia, especially when it comes to large gatherings that generate significant revenue. The aim of this paper is to analyze the main characteristics of congress tourism market in the world and Serbia, which has all the requirements to become a leading destination of this form of tourism in Southeastern Europe.
Leader – Ex-Post Evaluation of the Delivery Mechanism / Leader – Ex-Post Hodnotenie Implementačného Mechanizmu
Authors: Bumbalová Monika , Takáč Ivan , Valach Martin , Tvrdoňová Jela
Published: May 2018

LEADER approach represents one of the basic pillars of current rural development policy implemented at the European level. Logical foundation of the approach is based on 7 key features, which should be horizontally presented throughout the whole delivery mechanism. That is why the presented paper is oriented on answering the research question: to what extent was delivery mechanism of LEADER (at the level of managing authority and local action groups) during the programming period 2007-2013 supporting the implementation of 7 features of LEADER approach. In order to fulfi l the stated objective there must be individual steps of delivery mechanism defi ned at both levels, consequently all the features of LEADER approach were described and the criteria of success - benchmarks were determined. Mutual linking of these steps resulted in creation of an implementation matrix what represents a visual outcome of the study.
Obligations Related to the Transportation of pet Animals (Eu Legislation) / Povinnosti Súvisiace S Prepravou Spoločenských Zvierat (Európska Legislatíva)
Authors: Pavlíková Barbara
Published: May 2018

A present paper deals with the question very often solved by the pet owner all around the EU Member States. It provides a closer look at the obligations associated with the travelling with the pet animals between the Member States or between the Member State and the third countries. It is focused on non-commercial transportation of pets, as vacation, trip, etc. Contribution by the means of synthesis, analysis and comparison offers an overview of the fundamental EU legislative acts in the fi eld in question. It also addresses the issue of pet passports, the most important identifi cation document, required for pet animals at the EU territory. Defi nitions of the frequently used terminology are listed.
The PE Ratio and the Predicted Earnings Growth – the Case of Poland
Authors: Kurach Radosław , Słoński Tomasz
Published: May 2018

We examine the components of equity returns on the Polish capital market. To analyse the underlying complexity of returns we took into consideration the model designed by Leibowitz (1999). This model captures three factors: dividend yield, expected growth in earnings and expected change in price-to-earnings (PE) ratio. We applied this model to analyse the average discount/premium not only to particular shares but to market averages as well. Firstly, we examined the variation of PE across the companies (as adapted from Penman (1996)) to analyse the average rate of return and their striking distance of individual stocks from a ‘normal’ level. Then we checked the transitory earnings in the portfolios of high PE, whereby a fall in current earnings relative to sustainable level of earnings leads to a transitory high PE ratio. We expect that the effect of transience in current year earnings can be significant. Lastly, we analysed the individual companies in order to check what percentage of companies give a “correct” signal about future prospects.
The influence of seedling density in containers on morphological characteristics of European beech
Authors: Wrzesiński Piotr
Published: May 2018

This study examines the influence on growth parameters, in particular the morphological features of the root system, of 1-year-old European beech seedlings cultivated in containers with two different densities. The experiment was conducted in the container nursery in Skierdy (Forest District of Jabłonna) in spring 2011. After 10 months of cultivation in Hiko polyethylene containers, above- and below-ground parts of the seedlings were measured. The measurements of the root system were conducted with a scanner and the WinRHIZO software. No influence due to the seedling density on either shoot height or thickness was observed, but instead the research showed that different seedling densities affected the development of root systems. The mean root thickness and dry mass of the European beech seedlings were significantly higher at the lower density. The influence of seedling density on the development of root mass deserves special attention as it is the most important factor affecting future growth of the seedlings during cultivation. This tendency also suggests that the amount of nutrients allocated to shoot development may be higher in order to improve the efficiency of photosynthesis. At both densities, differences in biomass accumulation affected the root-toshoot ratio. In seedlings cultivated at the lower density, the increased dry root matter of the seedlings resulted in a significant increase in the root-to-shoot ratio. This may cause a potential growth advantage of these seedlings after they are planted and may thus result in a more productive cultivation.
The influence of the cutting attachment on vibrations emitted by brush cutters and grass trimmers
Authors: Wójcik Krzysztof
Published: May 2018

Generally, the choice of cutting attachment used in brush cutters for brushwoods and grasses depends on the type of work, on one hand, and the size of the engine, on the other. However, at the same time, the use of individually chosen cutting elements entails a certain risk of vibration resulting from their varying design and size, which has a big impact on comfort and working time, but most importantly on operator health.

The aim of the study is a preliminary analysis of the dangers due to vibration of brush cutters and to determine how the choice of the cutting attachment affects the intensity of the vibrations emitted by the machine. Furthermore, one aim was to determine the daily vibration exposure, relative to an equivalent value of vibration, experienced by the device operator.

This study involved four models of brush cutters with three machines of each model, differing in size (displacement and engine power) and equipped with six different cutting elements. A vibration acceleration test was carried out in accordance with the applicable PN-EN ISO 5349-1 and 2: 2004 and Directive 2002/44 / EC.

An analysis of the obtained results leads to the conclusion that the examined professional brush cutters emit vibrations of such intensity that the daily exposure limit (5 m s−2) is exceeded more than two-fold. One cannot directly determine the influence on vibration intensity by the type of cutting attachment or the exhaust, but it should be noted that use of a cutting unit as recommended by the manufacturer creates less harmful vibrations, especially when the engine runs at the nominal rotational speed. In order to minimise the risk due to vibrations from brush cutters, engines with a cylinder capacity below 45 cm3 are recommended to be equipped with trimmer heads and disk knives, while engines with over 50 cm3 should run with circular saws.
Comparing Empetro nigri-Pinetum and Vaccinio uliginosi-Betuletum pubescentis soils in terms of organic matter stocks and ecochemical indices in the Słowiński National Park
Authors: Jonczak Jerzy , Parzych Agnieszka
Published: May 2018

We conducted comparative studies on soil organic matter stocks and indices of the soil’s ecochemical state under Empetro nigri-Pinetum (En-P) and Vaccinio uliginosi-Betuletum pubescentis (Vu-Bp) in the Słowiński National Park. The investigated plant communities are associated with Arenosols that developed from eolian sands and are exposed to high groundwater levels. The presence of fossil Histosol at a depth of 75 cm in the Vu-Bp stand, which lies below the current groundwater level, is the factor that sets both stands apart. The fossil soil strongly differs from Arenosol in terms of its chemical composition. A high abundance of nutrients in bioavailable forms in the soil is one of the reasons for natural renewal of downy birch in the stand, which presence in turn affects the turnover of elements and the properties of Arenosol. The results of our studies confirm the existence of strong feedback between the soil and plant communities. Soils under the mixed pine-birch Vu-Bp stand are characterized by smaller stocks of organic matter and total organic carbon (TOC) contained in the ectohumus as compared to the soils under the pure pine En-P stand. The opposite is found in the humic horizon. Additionally, in the Vu-Bp stand we observed greater accumulation of total nitrogen (TN) in ectohumus, which is reflected in lower TOC:TN ratios. The contents of TN and TOC:TN ratios in humic horizons were similar in both stands. The soils under En-P were more strongly acidified, especially in O-horizons. Mineral horizons in both stands were characterized by a very small sorptive capacity, which increased in ectohumus and fossil soil. Significant differences between the stands were observed in the ionic composition of sorptive complexes. The soils under Vu-Bp stand were more strongly saturated with basic cations, predominantly calcium. In soil solums of both stands, we observed a deficit of bioavailable potassium and magnesium, which was partially compensated by significant amounts of these components in ectohumus and fossil soil in the Vu-Bp stand. Despite a strongly acidic pH, molar Ca:Al ratios suggest that there are no phytotoxic effects due to free aluminium in ectohumus, while they are unlikely in mineral horizons. The risk of phytotoxic effects is reduced by the influx of calcium from groundwater.
The influence of drought on the water uptake by Scots pines (Pinus sylvestris L.) at different positions in the tree stand
Authors: Boczoń Andrzej , Wróbel Michał
Published: May 2018

Periodically occurring drought is typical for the climate of Poland. In habitats supplied exclusively with rain water, tree stands are frequently exposed to the negative effects of water deficit in the soil. The aim of this study was to examine the water uptake and consumption of two individual Scots pine trees under drought conditions. The trees were located at different positions within the stand and at the time of study were over 150 years old. Soil moisture, availability of soil water and the quantity of water uptake by the individual trees were examined by measuring the water velocity inside the trunks (Thermal Dissipation Probe method).

Two periods of intense drought occurred in the summer 2006 only a few days apart. Before the drought, pine No. 1 (dominant) took up 66.7 dm3 water per day and pine No. 2 (co-dominant) took up 52.3 dm3 per day. The observed responses of the examined pines to the first period of drought were similar: the low soil water content resulted in a suppression of water uptake in both trees. After the end of the drought period however, the recovery responses of the two trees were different. Pine No. 1 resumed water uptake at values similar to those before the drought. Pine No. 2 on the other hand did not resume water uptake. We conclude that in case of this second tree the vegetative season possibly ended already at the end of June.
Plans for the development of infrastructure and tourism activities in landscape parks under the State Forests’ administration
Authors: Referowska-Chodak Ewa
Published: May 2018

The aim of the study was to present plans (up to 2030) for the development of infrastructure and tourism activities in the Polish landscape parks located in the area of the State Forests’ administration.

At the end of 2013, a survey was conducted the results of which were verified and their analysis completed in 2014. The questionnaire was sent to the directorates of all 122 parks. 70.5% of the directorates replied to the open question inquiring about their plans and demands for tourist activities (including educational tourism) and recreation. These were then correlated to parks in areas under the State Forests’ administration.

The most commonly proposed/planned actions by the directorates in cooperation with the Forest Districts are: construction of new educational paths (in 41.9% of parks), maintaining the existing ones (24.4%) and the organization of tourism/recreation and educational events (22.1%). The largest share of proposed/planned actions without the cooperation of the Forest Districts comes from the creation of new routes/trails, parking lots, etc. along with their equipment (36.0%), construction of tourist infrastructure (bins, benches, tables, shelters, fire circles, sightseeing towers, bridges, 18.6%) and the issuing of maps, brochures, guides or other publications (17.4%).

However, it is of particular importance to take the need for nature conservation in the development of tourism and recreation in areas of landscape parks into account. The literature provides a number of helpful solutions. Furthermore, such activity requires broad cooperation supported by external funds especially between the parks, Forest Districts and municipalities.

It is also important to continue the environmental education of both, visitors and locals, as well as the promotion of eco-tourism and responsible use of the environment.
The vulnerability of silver fir populations to damage from late frosts
Authors: Klisz Marcin , Jastrzębowski Szymon , Ukalska Joanna , Przybylski Paweł , Matras Jan , Mionskowski Marcin
Published: May 2018

The aim of the study was to determine the vulnerability of selected silver fir populations to damage from late frost in the climatic conditions of south-eastern Poland. To determine the vulnerability of apical and lateral shoots to damage caused by late frosts, we observed four test plots in 2009 and 2014, each containing progenies of selected seed stands. Our statistical analyses were based on a model incorporating the following variables: site, year, type of frost damage, population as well as the possible interaction between these variables. Significant differences between the populations were found in terms of their sensitivity to damage from low temperature occurring during the growth period. Furthermore, we indirectly demonstrated differences in the severity of late frost on the experimental plots, as well as the intensity and variability of late frost shoot damage. Based on these results, we divided the studied populations into two groups of low (EF, KRA1 and NAR) and high (LES2 and BAL2) sensitivity to late frost damage.
The change in weight and surface temperature of a pine cone (Pinus sylvestris L.) as a result of microwave irradiation
Authors: Aniszewska Monika
Published: May 2018

In this article, the author investigates the change of weight and temperature of pine cones in a microwave oven over the following range of microwave irradiation power (PMF): 800, 620, 440, 260 and 130 W.

Cones were divided into groups according to their weight and the author examined the influence of PMF on their water content and drying rate. The process is described with the help of mathematical equations and curves. The cones were irradiated in the microwave until all cones of the given group began to open the first scales. Small cones required longer exposure times to PMF than medium and large cones in order to cause scale opening. The most efficient of the five settings was a irradiation power of 620 W with an exposure time to microwaves for no longer than 20 seconds.

In the second part of the study, the author analyses the changes of temperature on the cone surface using a thermal imaging camera. The values of surface temperature depended on irradiation power and the duration of irradiation.
The use of phosphates in forestry
Authors: Tkaczyk Miłosz , Kubiak Katarzyna A. , Sawicki Jacek , Nowakowska Justyna A. , Oszako Tomasz
Published: May 2018

Phosphite preparations are now an important alternative in plant protection against new, invasive pathogens of the genus Phytophthora and/or Pythium. It is crucial to intervene when alien, invasive oomycetes are carried to plantations or forest stands and attack fine roots via zoospores. The aim of this paper was to demonstrate the possibility of phosphite application to induce resistance to tree pathogens. Phosphate-based fertilizers have been used successfully in nurseries, where application is relatively easy by means of foliar sprays. the traditional fungicides, which are effective in combating fungi, however, fail to control oomycetes. Instead, they mask the disease, which, in turn, causes serious damage to seedlings after they have been planted in a suitable environment. Moreover, the number of effective fungicides available for forest plant protection has continued to decrease in the last decade. The effectiveness of the chemicals is reduced due to their frequent use and their similarity in terms of the active compound or the mechanism of action. Given the low diversity of active compounds, it is necessary to monitor the development of resistance of pathogens to fungicides by means of molecular biology (sequencing and quantitative PCR). Minimising the undesired side effects of chemicals on both, mycorrhizal fungi and pathogens can be achieved by strict adherence to rigorous security measures and, where possible, frequently changing the active compounds to alternatives such as phosphites. The significance of phosphate and phosphite uptake by trees is still a matter of debate, especially under field conditions. Nevertheless, phosphites are environmentally friendly compounds, which constitute an alternative or complement to the traditional chemicals (in accordance with the Directive on Integrated Plant management).