bluuebunny/crossref_metadata_2025_split huggingface dataset:
Uncertainty analysis of measuring system for instantaneous power research
Authors: Dzwonkowski Ariel , Swędrowski Leon 
Published: May 2018

Abstract
The electrical power drawn by an induction motor is distorted in case of appearance of a certain type of failures. Under spectral analysis of the instantaneous power one obtains the components which are connected with definite types of damage. An analysis of the amplitudes and frequencies of the components allows to recognize the type of fault.
The paper presents a metrological analysis of the measurement system used for diagnosis of induction motor bearings, based on the analysis of the instantaneous power. This system was implemented as a set of devices with dedicated software installed on a PC. A number of measurements for uncertainty estimation was carried out. The results of the measurements are presented in the paper. The results of the aforementioned analysis helped to determine the measurement uncertainty which can be expected during bearing diagnostic measurements, by the method relying on measurement and analysis of the instantaneous power of an induction machine.
Algorithm for Simultaneous Parameter Estimation of A Multiharmonic Signal
Authors: Petrović Predrag B. 
Published: May 2018

Abstract
Estimating the fundamental frequency and harmonic parameters is basic for signal modelling in a power supply system. Differing from the existing parameter estimation algorithms either in power quality monitoring or in harmonic compensation, the proposed algorithm enables a simultaneous estimation of the fundamental frequency, the amplitudes and phases of harmonic waves. A pure sinusoid is obtained from an input multiharmonic input signal by finite-impulse-response (FIR) comb filters. Proposed algorithm is based on the use of partial derivatives of the processed signal and the weighted estimation procedure to estimate the fundamental frequency, the amplitude and the phase of a multi-sinusoidal signal. The proposed algorithm can be applied in signal reconstruction, spectral estimation, system identification, as well as in other important signal processing problems. The simulation results verify the effectiveness of the proposed algorithm.
Problem of Profile Matching in Sphericity Measurements by the Radial Method
Authors: Janecki Dariusz , Adamczak Stanisław , Stępień Krzysztof 
Published: May 2018

Abstract
At the Kielce University of Technology a new concept of accurate measurements of sphericity deviations of machine parts has been developed. The concept is based upon measurement of roundness profiles in many clearly defined cross-sections of the workpiece. Measurements are performed with the use of typical radial measuring instrument equipped with a unit allowing accurate positioning of the ball. The developed concept required finding a solution to numerous problems relating to the principle of the radial measurement. One of the problems to be solved was matching of measured roundness profiles. The paper presents an outline of the developed concept of sphericity measurement, a mathematical model of profile matching and results of the verification of the model.
Antibiotic resistance genes and virulence factors in Enterococcus faecium and Enterococcus faecalis from diseased farm animals: pigs, cattle and poultry
Authors: Sˇ Eputiene˙ V. , Bogdaite˙ A. , Ruzˇauskas M. , Suzˇiede˙Liene˙ E. 
Published: May 2018

AbstractEighty enterococcal isolates (E. faecium, n=38,E. faecalis, n=42) from diseased farm animals (swine, cattle, poultry) in Lithuania have been studied for the prevalence of antibiotic resistance and for resistance and virulence genetic determinants. 86% ofE. faeciumand 71% ofE. faecalisisolates were multidrug resistant (resistant to three or more unrelated antibiotics). Resistance to aminoglycosides, tetracycline and erythromycin was found most frequently in both species (61%, 69%) and was linked toaph(3’)-IIIa,aac(6’)-Ie-aph(2”)-Ia,ant(6)-Ia (aminoglycoside resistance),tetM,tetL(tetracycline resistance),ermA,ermB(erythromycin resistance) gene combinations, which were supplemented with chloramphenicol resistance genescatA7,catA8(E. faecalis) andcatA9(E. faecium). AllE. faecalisisolates harboured genes coding for virulence factorsagg,esp,fsr gelEalone or in combinations with the high prevalence ofespgene in isolates from cattle (63%) and pigs (79%). The origin- dependent incidence ofagggene variantsprgBandasp1was observed. The results indicate the existence of a large pool of potentially virulent and multidrug resistantE. faecalisin diseased farm animals posing risk to humans.
Anatoxin-a induces apoptosis of leukocytes and decreases the proliferative ability of lymphocytes of common carp (Cyprinus carpio L.) in vitro
Authors: Bownik A. , Rymuszka A. , Sierosławska A. , Skowroński T. 
Published: May 2018

Abstract
Cyanobacteria (Cyanophyta, Cyanoprocaryota, Cyanobacteria) (blue-green algae) are procaryotic phototrophic microorganisms playing an important ecological role in the freshwater and marine environment as primary producers. However, as a consequence of water eutrophication observed in many reservoirs in different parts of the world, these microorganisms form massive scums, known as water blooms, releasing cyanotoxins hazardous to fish and other aquatic organisms. Cyanotoxins are cyanobacterial secondary metabolites of various chemical structures harmful to humans, terrestial and aquatic animals such as fish. The most abundant cyanotoxins are microcystins and hepatotoxins inducing toxic changes in fish liver, kidney, gills, digestive tract and immune system. Very little is known on the effects of alkaloid neurotoxic anatoxin-a on fish and their immunity. The aim of this study was to assess the in vitro influence of anatoxin-a on immune cells isolated from the common carp (Cyprinus carpio L.). The leukocyte intracellular level of ATP was reduced only at the highest concentration of anatoxin-a. Apoptotic and necrotic leukocytes were observed at the lower and the highest concentrations of anatoxin-a, respectively. Elevated activity of caspases 3/7 after 2 hours and a concentration-dependent decrease in the proliferative ability of T and B lymphocytes was also observed. The results suggest that anatoxin-a could be a possible immunotoxic agent in the aquatic environment and may increase the susceptibility of fish to infectious and neoplastic diseases. Therefore, constant monitoring of anatoxin-a and its producers in lakes and fish ponds should be performed
Effects of Se deficiency on serum histamine concentration and the expression of histamine H2 receptor in the jejunum of chickens
Authors: Wang Guo-Qing , Wang Hong-Hai , Wang Hai-Xia 
Published: May 2018

Abstract
The present study was designed to investigate the influence of Se deficiency on serum histamine concentration and the expression of histamine receptor in the jejunum of chickens. Forty neonatal chickens were randomly divided into two groups. Experimental chickens were fed a low-Se diet (0.034 mg/kg), whereas chickens in the control group were fed a diet with a Se level of 0.229 mg/kg. Ten chickens were sacrificed on days 30, 45, 60 and 75. Blood and jejunum samples were collected. Histamine concentration in the jejunum was measured by ELISA, the jejunal mast cell (MC) ultrastructure was studied by transmission electron microscopy, and the expression level of histamine H2 receptor (H2R) mRNA in the jejunum was examined using real-time PCR. Results: The jejunal histamine concentration in chickens fed the low-Se diet was significantly higher than that in the control group (P<0.01). Se deficiency induced degranulation of MC in the jejunum of chickens in the low-Se diet group; their cytoplasm was filled with fused granules and vacuoles. The expression level of jejunal H2R mRNA in chickens fed the low-Se diet was also significantly higher than that in the control group (P<0.01). The results obtained suggest that Se deficiency stimulates MC degranulation and release of histamine, binding H2R promotes both regulation of digestion and cell proliferation while protects the jejunum from injury induced by Se deficiency.
Molecular diagnostics of Sarcocystis spp. infections
Authors: Stojecki K. , Karamon J. , Sroka J. , Cencek T. 
Published: May 2018

Abstract
Protozoa of the genus Sarcocystis (phylum Apicomplexa, family Sarcocystidae) is one of the most common parasites affecting animals. Interspecies diagnostic of Sarcocystis genus was based on electron microscopy for many years. Because of absence of visible differences between species with reachable magnifications, light microscopy is useless. In many cases serological diagnostic method have lack of sensitivity. A variety of molecular methods have been developed and used to detect and identify Sarcocystis spp. and to assess the genetic diversity among this protozoan from different population/hosts. Nowadays, molecular diagnostic is the common, time/cost effective method used all over the world to interspecies differentiation.
Influence of rapeseed meal on lard stability
Authors: Kreps František , Schmidt Štefan , Vrbiková Lenka , Tmáková Lenka , Hlásniková Jarmila , Sekretár Stanislav 
Published: May 2018

Abstract
The experiment focused on the possibility to utilise the antioxidant potential of rapeseed meal to stabilize fats. The lard, which was used for this purpose, was characterized by gas chromatography. At first the non-sieved meal was added in lard. It is the least technologically difficult method of utilizing meal. Then, the meal was sieved to obtain five fractions, which were added to lard. The aim was to find a fraction of meal that would best stabilize the lard. The results of lard stability with added fractions were compared with the stability of lard enriched with non-sieved meal. Finally, we obtained ethanol and ethyl acetate extracts from non-sieved meal and from the fraction which was the best stabiliser of lard. The aim was to study the effect of these extracts on the stability of lard.
Rapeseed meal has stabilized the lard already at 0.5 wt. % content. The non-sieved meal addition of 1, 2 or 4 wt. % has improved the stability of lard by 1.2-2 times. Adding 8-15 wt. % of meal into lard has increased its stability by 3-8 times. The best lard stability has been determined in the fraction retained on the sieve with mesh size 0.15 mm. The lard with added sieved meal has gained a comparable stability the same as after addition of non-sieved meal. The lard with the same additions of extracts (ethanol and ethyl acetate) from non-sieved meal and from meal with sizes 0.15-0.315 mm was more stable than the lard with addition of meal alone. The lard containing ethanol extracts (0.5 wt. %) has a better stability than the lard containing butylated hydroxytoluene (0.02 wt. %).
Ion-pairing in aqueous solutions of peroxodisulfates
Authors: Balej Jan 
Published: May 2018

Abstract
Probable values of the degree of ion-pairing (ion-association) of aqueous solutions of alkali metal and ammonium peroxodisulfates have been calculated for various estimated values of association constants, in dependence a) on the concentration of the binary solution, b) on the concentration of the other electrolyte in the polycomponent solution with the common ion, able or not able to form ion pair, and c) on the value of the activity quotient Qa. It followed that in the presence of another component with a common cation and neglecting the influence of activity coefficients, the ion-association degree of peroxodisulfate α > 0.5 in solutions with total molality mt > 0.1 mol kg-1; as mostly Qa < 1.0, the ion-association degree is even higher so that in such cases the alkali metal and ammonium peroxodisulfates can prevailingly behave as uni-univalent electrolytes. In agreement with these results, evaluation of the solubility of sodium, potassium and ammonium peroxodisulfates in some ternary and quaternary systems has been performed under the simplified assumption of a complete ion-association to MS2O81- ions. It has been shown that the mean deviations between the calculated and observed solubilities of the crystallizing components are almost equally low as under the assumption of a total dissociation of the corresponding substances. The results indicated that the prevailing ion-association of more concentrated solutions of peroxodisufates could be taken as an acceptable approach for the quantitative evaluation of physico-chemical behaviour of systems containing peroxodisulfates.
Influence of aerobic and anaerobic conditions on the growth and metabolism of selected strains of Lactobacillus plantarum
Authors: Smetanková Jana , Hladíková Zuzana , Valach František , Zimanová Michaela , Kohajdová Zlatica , Greif Gabriel , Greifová Mária 
Published: May 2018

Abstract
Three wild strains of Lactobacillus plantarum were investigated for their growth and ability to produce lactic acid, acetic acid and ethanol under aerobic and anaerobic conditions. They were tested at three different temperatures (30 °C, 37 °C and 45 °C). The growth of lactobacilli was studied by measuring optical density (OD) at λ = 600 nm and pH value at the following times. With increasing temperature difference of cell yield was observed. The final cell yield under aerobic conditions was higher. Organic acids and ethanol were analysed using an HPLC RID method. Formation of lactic acid (as the major metabolite) was the slowest during cultivation at 30 °C, but the final amount of lactic acid showed the highest values. Concentrations of metabolites produced by lactobacilli after 48th hours of cultivation were: 9.18-11.48 g.dm-3 (lactic acid), 0.84-1.65 g.dm-3 (acetic acid) and 2.51-4.03 g.dm-3 (ethanol). No significant differences (p = 0.05) were found in production of lactic acid and ethanol by different bacterial strains under aerobic and anaerobic conditions. Statistically significant differences (p = 0.05) were observed in production of acetic acid by 2L2 under aerobic and anaerobic conditions and for production of ethanol under anaerobic conditions by strains 1L5 and 2L2.
Bioacoustics of Isophya Dobrogensis, a Romanian Endemic Bush-Cricket (Orthoptera: Phaneropteridae)
Authors: Iorgu Ionuţ Ştefan 
Published: May 2018

Abstract
The acoustic behavior of Isophya dobrogensis Kis, one of the 11 endemic Romanian Orthoptera species and one of the most vulnerable Orthoptera species in Europe, is described for the first time. Male song consists of long syllables with clear distinction between the opening hemisyllable and the closing one, comparable in structure with the audible signals of I. costata Brunner von Wattenwyl and I. longicaudata Ramme. Female acoustic response to male is one of the longest and most elaborated known within this genus.
Overview on the Chrysomeloidea Superfamily (Coleoptera: Cerambycidae, Orsodacnidae, Chrysomelidae) in Dobrogea (Romania)
Authors: Serafim Rodica , Maican Sanda 
Published: May 2018

Abstract
The study represents a synthesis about the distribution of the species from superfamily Chrysomeloidea in Dobruja (Dobrogea) region (South-eastern Romania). 407 species from 132 genera and 15 subfamilies are recorded, based on the published data and on the study of material preserved in the collections of the “Grigore Antipa” National Museum of Natural History (Bucharest) and the Institute of Biology Bucharest of the Romanian Academy. The species Lilioceris lilii (Scopoli), Oulema erichsonii (Suffrian), Euluperus cyaneus (Joannis) and Altica quercetorum quercetorum Foudras are mentioned for the first time in fauna of Dobrogea. Some endemic species are highlighted: Vadonia hirsuta (K. Daniel & J. Daniel), Dorcadion equestre transsilvanicum Ganglbauer, D.gashtarovi Sama, Dascălu & Pesarini, D. axillare Küster and Brachyta balcanica Hampe. Rosaliaalpina alpina Linnaeus, Morimus asper funereus Mulsant and Cerambyx cerdo cerdo Linnaeus are protected species, included in the annexes of the Council Directive 92/43/EEC on the conservation of natural habitats and wild fauna and flora. Also, Brachyta balcanica Hampe, Pedostrangaliaverticalis Germar and Neodorcadion exornatum (Frivaldsky von Frivald) are species of national interest requiring strict protection, listed in the Government Emergency Ordinance no. 57/2007 on the regime of natural protected areas, the conservation of natural habitats, wild fauna and flora. Among the rare species we mention: Coptosia albovittigera Heyden, Deroplia genei genei (Aragona), Phytoecia praetextata praetextata (Steven), Cerambyx miles Bonelli, C. welensii Kuster, Vadoniamoesiaca Daniel & Daniel, Cortodera differens Pic, Agapanthia kirbyi (Gyllenhal), Macropleamutica (Fabricius), Clytra valeriana (Ménétries) and Cryptocephalus bohemius Drapiez.
Observed and projected impacts of slow cultural eutrophication on the fish assemblages of a shallow tropical African reservoir
Authors: Mustapha Moshood K. 
Published: May 2018

Abstract
High concentrations of nitrate and phosphate which was above the normal natural background levels which ranged between 1.4 mg l-1 ±0.1 - 6.4 mg l-1 ±0.3 and 0.7 mg l-1 ±0.0 - 2.2 mg l-1 ±0.2 were recorded in Oyun reservoir, Offa, Nigeria, a shallow tropical African reservoir. The relatively high nitrate and phosphate load was observed to have come from a non-point source of run-off of nitro-phosphate fertilizers from nearby farmlands into the reservoir. This resulted in slow cultural eutrophication. This was observed to have impacted on the catch and fish assemblages of the reservoir with high abundance and dominance of pelagic phytoplanktivorous fishes such as cichlids, while benthic and non-phytoplanktivorous species were found in low abundance. Other possible impacts of the eutrophication when it becomes accelerated were discussed. Measures to reduce the eutrophication in order to enhance adequate fish assemblages and management techniques for sustainable exploitation of the fisheries in the reservoir were suggested.
Changes in land use in the buffer zone of lake of the Mała Wełna catchment
Authors: Ptak Mariusz , Ławniczak Agnieszka E. 
Published: May 2018

Abstract
One of the most important elements in the protection of water quality is buffer zones. In order to protect water quality, appropriate management of these areas is necessary. In the paper, changes in the land use in the buffer zone of 200 m width around lakes in the Mała Wełna catchment over 20 years were analysed. For the study eight lakes larger than 50 ha were chosen. Changes in the land use within the buffer zone were studied from 1980 to 2000, based on topographic maps in the scale 1:10 000. Results show both positive and negative aspects of land changes. An increase in forested areas and grasslands through tilled land were positive aspects of these changes. On the other hand, the enhancement of suburban development in these zones caused increased probability of water pollution from these areas. Calculations of potential nutrient loading from different types of land use in these zones indicated an enhancement of nutrient sources in the lakes within the 20-year study period. However, these changes are not significant in comparison to the nutrient loads contributed by the tributaries. Our study indicated that in the case of flow lakes, more important is an improvement in water quality in the tributaries and a reduction in nutrient sources in the catchment with the purpose of reducing the input of nutrients into the lake. Management of the buffer zone is one of the issues which have to be taken into consideration in lake protection after elimination of the major water pollutant sources.
Addition of four new species to the genus Kisaura Ross, 1956 (Trichoptera: Philopotamidae) from the Indian Himalaya
Authors: SINGH PANDHER Manpreet , Singh Saini Malkiat , Ramamurthy V.V. 
Published: May 2018

Abstract
. This paper is a contribution to the knowledge of the Indian fauna of the genus Kisaura ROSS. Here we describe and illustrate four new species from the Indian Himalaya: Kisauraarunachalica and K. kamengensis (both from Arunachal Pradesh), K. meghalayaensis (from Meghalaya) and K. pupi (from Uttarakhand).
Biting midges of the genus Dasyhelea Kieffer (Diptera: Ceratopogonidae) in Poland
Authors: Dominiak Patrycja 
Published: May 2018

Abstract. This article reviews 30 species of biting midges of the genusDasyheleathat are known to occur in Poland. Diagnoses and detailed descriptions of adults are provided for all Polish species, as well as keys (based mainly on males) for the identification of subgenera and their included species.Dasyhelea excellentisBORKENT, 1997 is recognized as a new junior synonym ofDasyhelea bifidaZILAHI-SEBESS, 1936 (syn. n.) andDasyhelea lugensisBRODSKAYA, 1995 as a new junior synonym ofDasyhelea caesiaREMM, 1993 (syn. n.).Among the Polish biting midge fauna, most species of the genusDasyheleaare primarily arboreal, widely distributed Palaearctic species. The most species-rich samples were collected in the following regions: Eastern Baltic Lakelands (19 spp.), Southern Baltic Lakelands (16 spp.), Southern Baltic Coastlands (14 spp.) and Central Western Carpathians (12 spp.). The larvae were found in sap and tree holes, water accumulated in gutters and sinks, moist soil near fresh- and saltwater bodies, and peat bogs. Adults are known to visit flowers for nectar, and 16 Polish species were found on umbelliferous flowers.
Rare European donacid beetle Macroplea appendiculata PANZER, 1794 (Coleoptera: Chrysomelidae: Donaciinae) common in Polish fish ponds
Authors: Ścibior Radosław , Stryjecki Robert , Nieoczym Marek , Bezdĕk Jan 
Published: May 2018

ABSTRACT
Macroplea appendiculata PANZER, 1794 is an extremely rare species in Poland and Europe. This paper provides new data on the ecology of this species. 24 specimens of M. appendiculata were collected in fish ponds at Samoklęski. This beetle was caught mainly with active traps placed on the bottom, but it was not found in traps set just below the water surface. The data show that M. appendiculata is a typical benthic organism, moving vertically to only a small extent. The low rate of metabolism allows this beetle to inhabit waters of varied, as well as low, oxygen content. The occurrence of the most numerous population of M. appendiculata in fish ponds, currently known in Poland, indicates the crucial role of this kind of water body as a habitat for this species.
Modeling of pollutants in the air in terms of fire on dumps / Modelowanie zanieczyszczeń powietrza w warunkach pożaru na wysypisku
Authors: Biočanin Rade , Stefanov Sonja , Urošević Snežana , Mekić Sabahudin 
Published: May 2018

Abstract
Paper presents modelling of pollutants in the air in terms of fire on dumps. Uncontrolled fire on dumps where are tyre produce a lot of smoke and air pollutants, including benzene and polycyclic aromatic hydrocarbons (PAH). Great heat leads to the generation of pyrolytic oil which, when mixed with the fire extinguishing agent, contaminates the surrounding soil, surface water and underground water. Paper analyzes and presents in particular the emission factors of incomplete burning of waste car tyres. Metal dust emissions have been presented as well as volatile organic compund (VOC) emissions, slightly volatile organic compound (SVOC) emissions and emissions of polycyclic aromatic hydrocarbons (PAH). Evaluation of the effect on the air quality has been graphically presented by modelling of uncotrolled tyre burning by using EPA "SCREEN 3 MODEL".