Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2007 (vol. 55), issue 5
Vliv uhelných popelů na kvalitu kukuřice. Část 2. Mikroelementy.
The effect of hard coal ashes on the quality of maize yield. Part 2. Microelements
Jacek Antonkiewicz, Tomáš Lošák
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 9-16 | DOI: 10.11118/actaun200755050009 
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:...
Genové a genotypové četnosti mléčného proteinu kappa kaseinu u býků v inseminaci plemene českého strakatého a holštýnského
Allele and genotype frequencies of milkprotein kappa-casein (CSN3) in artifical insemination bulls of Czech Fleckvieh and Holstein breed
Jiří Bezdíček
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 17-22 | DOI: 10.11118/actaun200755050017
This thesis was meant to evaluate allele and genotype frequencies of kappa-casein (CSN3) in artificial insemination bulls in the Czech Republic of Czech Fleckvieh breed (n = 133) and Holstein breed (n = 58). Studied bulls were born between 1990 and 2005. Calculation was made by PowerMarker (Liu K., Muse S.V. 2005). Genotype frequencies established in Czech Fleckvieh bulls were AA = 0.391 AB = 0.4887 AE = 0.0075 BB = 0.0902 BE = 0.0226 and EE = 0 and allele frequencies were A = 0.6391 B = 0.3459 E = 0.015. Genotype frequencies established in Holstein bulls were AA = 0.5517 AB = 0.2759 AE = 0.1207 BB = 0 BE = 0.0345 and EE = 0.0172 and allele frequencies...
VYUŽITÍ KULTIVAČNÍCH A BIOCHEMICKÝCH METOD A POLYMERÁZOVÉ ŘETĚZOVÉ REAKCE PRO STANOVENÍ CLOSTRIDIUM TYROBUTYRICUM
Detection of Clostridium tyrobutyricum using cultivation and biochemical methods and polymerase chain reaction
Radka Burdychová, Pavla Sládková
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 23-28 | DOI: 10.11118/actaun200755050023
Anaerobic spore-forming bacteria of the genus Clostridium are commonly present in raw milk and some milk products. Their spores can survive pasteurization and can provoke so called late blowing defect in cheese caused by butyric acid fermentation. The only species of the genus Clostridium that is able to provoke late blowing is Clostridium tyrobutyricum.In this work, two cultivation methods for detection of butyric acid producing clostridia in raw and pasteurized milk and in cheese samples were compared. The results show that tube method is suitable for route identification (in concentration 102 CFU/ml or /g) of...
HODNOCENÍ PENETRAČNÍHO ODPORU PŮDY V MEZIŘADÍ VINIC S OHLEDEM NA POUŽÍVANÝ TECHNOLOGICKÝ POSTUP
The classification of penetration resistance of soil in interrow of vineyards in relation to technological procedure
Patrik Burg
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 29-36 | DOI: 10.11118/actaun200755050029
There is registered approximately 18 600 ha of intensive vineyards in this time in CZ. The intensive viticulture production is represent with high parts of working operations practise by the help of mechanization. Frequency of passages by mechanization in interrow of descent is different by single variants of production processes. Their number movening currently abreast 15-18 per annum. Their ground is soil compression, that is highest in tracked lines and middle of the interrow. If the compaction reach over the critical limit can be this state escorted by weighty incidence (decrease of decree, increasing by power severity by soil cultivation and other).
Vliv redukce listové plochy na výnos a kvalitu cukrovky (Beta vulgaris L. var. altissima Döll)
The effect of leaf area reduction on the yield and quality of sugar beet (Beta vulgaris L. var. altissima Döll)
Radim Cerkal, Jan Dvořák, Karel Vejražka, Jiří Kamler
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 37-44 | DOI: 10.11118/actaun200755050037
The yield of sugar beet is directly affected by LAI (leaf area index) and values of LAD (leaf area duration). The integral leaf area plays, except for other factors, an important role during the damage or reduction of leaf apparatus. There are many sources of leaf damage: natural disasters (hailstorm), diseases, pests (including game browsing) etc. The intensity of the root production and quality differs in relation to the growth stage of the damage plant. The aim of this study was to evaluate the extent of losses in the root yield and the quality of sugar beet upon gradual reduction of the leaf area. Two diploid varieties Monza and Compact were used...
VLIV DÉLKY ZRÁNÍ OLOMOUCKÝCH TVARŮŽKŮ NA JEJICH SENZORICKÉ A TEXTURNÍ VLASTNOSTI
The influence of ripening of Olomouc cheese on its sensory and texture properties
Olga Cwiková, Šárka Nedomová
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 45-50 | DOI: 10.11118/actaun200755050045
The ripened cheese is typical by taste and aroma and texture also. The object of research was the influence of ripening on sensory and texture properties of Olomouc cheese with the determination the optimum lenght of ripening for consumers. High storage temperature of curd, deficiency of air oxygen and some other factors determine the senzory characteristics of this type cheese. The samples were taken from the factory directly and stored in the same conditions in cold (7 °C) during 5 weeks. Aroma, colour, appearance, level of ripening, consistence, taste, dry matter and texture analysis by TIRA machine 27 025 were followed. Cutting test measured the...
Vliv přídavku vybraných karagenanů na viskoelastické vlastnosti modelových tavených sýrů
The effect of addition of selected carrageenans on viscoelastic properties of model processed cheese spreads
Michaela Černíková, František Buňka, Vladimír Pavlínek, Pavel Březina, Jan Hrabě, Stanislav Kráčmar
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 51-58 | DOI: 10.11118/actaun200755050051
The effect of 0.25% w/w κ-carrageenan and ι-carrageenan on viscoelastic properties of processed cheese were studied using model samples containing 40% w/w dry matter and 45 and 50% w/w fat in dry matter. Experimental samples of processed cheese were evaluated after 14 days of storage at the temperature of 6 ± 2 °C. Basic parameters of processed cheese samples under study (i.e. their dry matter content and pH) were not different (P ≥ 0.05). There were no statistically significant differences in values of storage modulus G' [Pa], loss modulus G'' [Pa] and tangent of phase shift angle tan δ [-] for the reference frequency of...
STRAVITELNOST ORGANICKÉ HMOTY SMĚSNÝCH KRMNÝCH DÁVEK S PŘÍDAVKEM KVASINKOVÉ KULTURY METODOU IN VITRO
Digestibility of organic matter of total mixed rations with the supplementation of yeast culture using the in vitro method
Jan Doležal, Petr Doležal
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 59-64 | DOI: 10.11118/actaun200755050059
We conducted this study to evaluate the new in vitro system, DAISYII to determine organic matter (OM) digestibility in ruminant feedstuffs with and without addition of the yeast culture (RUMEX) in the amount of 0 grams; 0.30 grams and 2.40 grams/2L of rumen fluid. Three types of total mix rations (TMR) were used in the experiment. Feedstufs samples were mixed in the ruminal fluid of cows. The material was incubated at 39 degrees of Celsius for 48 hours. Results from the DAISYII were compared with one another. Higher fibrous material content in 1 kilogram of dry matter (145.4 grams or 218.6 grams) and less energy ME (10.24...
Stanovení větrné eroze v působnosti větrolamů
Determination of wind erosion next to shelterbelts
Jana Dufková
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 65-70 | DOI: 10.11118/actaun200755050065
The influence of shelterbelts on the erodibility of soil by wind was studied at three chosen shelterbelts of Southern Moravia, Czech Republic - near the shelterbelts in the cadastral areas of Dolní Dunajovice, Micmanice and Suchá Loz. Ambulatory measurements of wind velocity as so as soil sampling for soil humidity analyses, non-erodible and clay particles analyses were done during the year of 2006. Subsequently, real erodibility of soil by wind was determined at these three areas. Results of the measurements and calculations verify positive effect of shelterbelts consisted in wind velocity decreasing (at about 78% in average), soil humidity increasing...
VALIDACE POUŽITELNOSTI ALGORITMU RELATIVNÍHO SYNTETICKÉHO UKAZATELE KVALITY SYROVÉHO MLÉKA (SQSM) PRO KONZISTENTNÍ MODIFIKACI FARMÁŘSKÉ CENY
A validation of algorithm practicability of the relative synthetic raw milk quality indicator (SQSM) for consistent modification of farmer price
Oto Hanuš, Libor Janů, Marcela Vyletělová, Antonín Macek
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 71-82 | DOI: 10.11118/actaun200755050071
This paper is focused on validation of new synthetic raw cow milk quality indicator which was calculated according to previously developed algorithm. The aim was to carry out a synthesis of values of individual milk quality indicators (MQIs) into one standardized relative milk quality indicator (SQSM). This is useable for farmer milk price modification according to milk quality in dependence on its change in every case. It is a possible ground for consistent milk payment according to its quality. This work is fifth step in the row of works. It is carried out in terms of next promotion of the milk foodstuff chain safety and for the improvement of the...
VLIV PROSTŘEDÍ NA VÝNOS A OBSAH SILICE KMÍNU KOŘENNÉHO (CARUM CARVI L.)
Environmental influence over the emblements and content of the caraway essential oil (Carum carvi L.)
Jaroslav Králík, Miroslav Jůzl, Blanka Kocourková
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 83-94 | DOI: 10.11118/actaun200755050083
The work deals with the possibility of improvement of qualitative and quantitative parameters of caraway (Carum carvi L.). The yield of the achenes is not satisfactory during last years and qualitative demands are clarify in correspondence to the market. The possibilities of this variation can be found in growing technology and in variety spectrum. The influence of weather is inconsiderable. Therefore, the experiments with three varieties were found (PROCHAN, KEPRON and REKORD). They were cultivated in cover crop and as pure growth on three sites. The yield components were evaluated in all variants: the yield of the achenes from m2,...
SENZORICKÉ HODNOCENÍ FERMENTOVANÝCH BIO SALÁMŮ
Sensory analysis of organic produced fermented salamis
Marcela Králíková, J. Jandásek, Alžbeta Jarošová, Květoslava Šustová
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 95-100 | DOI: 10.11118/actaun200755050095
The aim of my work was sensory analysis of organically produced fermented salamis and their comparison with conventionally produced salami. The products used in the analysis were: Bio Uherský salám with sea salt, Bio Uherský salám with kitchen salt and conventionally produced Uherský salám. The following parameters were analyzed: slice appearance, texture, aroma and taste. The sensory analysis was carried out by 93 students, as part of practical exercises of a sensory analysis course. Samples were compared and significant differences (P < 0,01) were found in texture, slice appearance and colour. Both salamis of organic origin were firmer, slice...
Sedm nových druhů podrodu Glaucolepis Braun z jižní Evropy (Lepidoptera: Nepticulidae, Trifurcula)
Seven new species of the subgenus Glaucolepis Braun from southern Europe (Lepidoptera: Nepticulidae, Trifurcula)
Zdeněk Laštůvka, Aleš Laštůvka
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 101-110 | DOI: 10.11118/actaun200755050101
Seven new species of the subgenus Glaucolepis Braun, 1917 of the genus Trifurcula Zeller, 1848 have been described from southern Europe, viz. Trifurcula (Glaucolepis) helladica Z. Laštůvka & A. Laštůvka sp. n. from Peloponnisos and Crete, Greece, T. (G.) corleyi Z. Laštůvka & A. Laštůvka sp. n. from Spain and Portugal, T. (G.) andalusica Z. Laštůvka & A. Laštůvka sp. n. from Andalusia, T. (G.) pederi Z. Laštůvka & A. Laštůvka sp. n. and T. (G.) salvifoliae Z. Laštůvka & A. Laštůvka sp. n. from various parts of Spain, T. (G.) montana Z. Laštůvka, A. Laštůvka &...
ANALÝZA PRODUKČNÍ KAPACITY BIOMASY SPOLEČENSTVA SALIX ALBA L. NA JIŽNÍ MORAVĚ
Production capacity of biomass of the floodpain community of Salix alba L. in southern Moravia
Diana López
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 111-116 | DOI: 10.11118/actaun200755050111
The paper deals with the study of the production capacity of biomass in the seven-year stand of Salix alba L. The communities originated in the process of primary succession in the area of the middle Nové Mlýny reservoir on a newly established island. Already since the first stages, the communities have been monitored. Results have shown that white willow behaves as an R-strategist with fast growth in youth. Moreover, the growth is supported by optimum environmental conditions (soils richly supplied with nutrients and water, long growing season). Accumulated phytomass amounted 102,7 t.ha-1 at the age of 7 years and the yield reached...
Mapování výskytu virových chorob révy vinné: GFLV a ArMV ve vinicích Šlechtitelské stanice vinařské v Polešovicích
Mapping of the occurrence of grapevine viruses: GFLV and ArMV in vineyards of the grapevine breeding station Polešovice
Pavel Pavloušek
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 117-122 | DOI: 10.11118/actaun200755050117
Due to their worldwide distribution and also detrimental potential virus diseases of grapevine are economically very important. In grapevine plants Grapevine fanleaf virus (GFLV) and Arabis mosaic virus (ArMV) is one of the most harmful virus pathogens. The aim of this study was evaluate the occurrence of GFLV and ArMV in vineyards of the Grapevine Breeding Station Polešovice (Czech Republic) using the ELISA test and visual symptoms. In every year from 2001-2004 altogether 225 grapevine plants were tested for the occurrence of GFLV and ArMV. In case of GFLV positive results were obtained in 43 plants, i. e. in 19.11% of all samples. In case of ArMV...
METODA HODNOCENÍ VĚTROLAMŮ JAKO PODKLAD PRO STANOVENÍ JEJICH ÚČINNOSTI
A metod for evaluation of the shelterbelts as a material for determination of thein efficiency
Jana Podhrázská
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 123-130 | DOI: 10.11118/actaun200755050123
This contribution presents the method of evaluation of the shelter-belts by using the referential points system. This method is based on evaluation the main characteristics of shelter-belts. There were evaluated the parameters of single shelter-belts, as well as their integration to the ecological network of the landscape. By this there was created the points system, which makes into account the age, height, width, length and gaps of the shelter-belt. In evaluation of the network (space layout) of shelterbelts threw were evaluated parameters of distance, relation to the systems of ecological stability and the integration to the geomorphology of the...
Vliv drobných zemních savců na výsadbu buku (Fagus sylvatica) ve smrkové monokultuře
The impact of small terrestrial mammals on beech (Fagus sylvatica) plantations in spruce monoculture
Luboš Purchart, Josef Suchomel
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 131-136 | DOI: 10.11118/actaun200755050131
Little is known about the impact of small terrestrial mammals on forest regeneration as yet. In order to determine the level of small rodent impact on artificial forest regeneration, 508 saplings have been researched in a spruce monoculture in the Drahany Uplands. With the objective to hone the interpretation of the data, small terrestrial rodents were trapped to help determine species spectrum. The occurrence of Apodemus flavicollis, Clethrionomys glareolus and Sorex araneus was verified. In 52 cases damage to the trunk caused by small rodents was monitored (10.1% of all saplings). 8 specimens (1.6%) had their branches nibbled...
Analýza odezvy dynamického buzení skořápek slepičích vajec
Response analysis of the dynamic excitation of hen eggs
Libor Severa
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 137-146 | DOI: 10.11118/actaun200755050137
Commercially produced hen eggs have been tested by means of dynamic excitation of the egg-shells with following analysis of their response. The falling steel ball have been chosen as a exciting instrument and the laser vibrometer have been used as a measuring device for the egg response. The reproductibility of the experiments has been relatively high and the surface velocity has been found to be significantly dependent on the position around the meridian. Analysed frequency spectrum has shown the peak frequency and frequency history. Proposed numerical model has demonstrated reasonable agreement with experimental results and can be used as an effective...
Hybridizace švestky domácí a meruňky purpurové (Prunus domestica L. x Armeniaca dasycarpa Ehrh.)
Hybridization of domestic prunes with black apricot (Prunus domestica L. x Armeniaca dasycarpa Ehrh.)
Igor Vasilevich Soldatov, Petr Salaš
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 147-154 | DOI: 10.11118/actaun200755050147
Within the framework of hybridization of domestic prunes and black apricots (Prunus domestica L. x Armeniaca dasycarpa Ehrh.) altogether sixteen plants were obtained, of which twelve were identified as hybrids and were kept alive, the same as the variety Jibeck. In hybrids, various degrees of domination of morphological traits of domestic prune were observed. Traits of black apricot were manifested weakly in seven hybrids and in the other five and in the variety Jibeck more perfect, semi dominant. In latter the effect of double set of genes was manifested, which was brought into the zygote by unreduced microspores of the black apricot....
FUNKČNĚ-ESTETICKÉ HODNOCENÍ KRAJINY
Functional and aesthetical evaluation of landscape
Dagmar Stejskalová
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 155-164 | DOI: 10.11118/actaun200755050155
Functional and aesthetical evaluation of landscape was used in the framework of Project QF4061 Landscape Plan of a Microregion in connection with the proposal of landscape measures to be taken in an important watercourse. As a part of the project the methodology of functional and aesthetical evaluation of landscape was defined as a method of landscape spatial planning. The methodology consists in the creation of landscape "matrix" as a landscape network of a definite size. The criteria of evaluation of the particular squares of this landscape matrix were defined in the framework of methodology. The defined criteria are not invariable, but they are...
Studium synuzie drobných zemních savců (Insectivora, Rodentia) Kelečské pahorkatiny - Česká republika
A study of the synusia of small terrestrial mammals (Insectivora, Rodentia) of the Kelečská pahorkatina Upland - Czech Republic
Josef Suchomel
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 165-170 | DOI: 10.11118/actaun200755050165
In 2006 to 2007, the community of small terrestrial mammals was studied in a natural forest area of the Kelečská pahorkatina Upland situated on the boundary-line of the Oderské and Hostýnské vrchy Hills (district of Přerov, Czech Republic). Biotopes under study represented artificial plantings of beech, mature production forest stands and forest reserves. In total, 83 small terrestrial mammals of six species were caught by means of snap traps laid in lines. The majority of species colonized young plantings (n = 6, H'= 1.35), high forests showing lower diversity (n = 4, H'= 0.76). In 2006, population densities of small mammals were very low. In 2007,...
ZOOPLANKTON A ZOOBENTOS RYBNÍKŮ ŽĎÁRSKÉHO REGIONU
Zooplankton and zoobenthos of the ponds in the Žďár region
Ivo Sukop
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 171-180 | DOI: 10.11118/actaun200755050171
In the years 1989-2000, the species composition and seasonal dynamics of zooplankton and zoobenthos in six ponds in the Žďár region were monitored. Altogether 83 taxa of water invertebrates were determined. Size and species composition of zooplankton and zoobenthos in studied ponds was influenced by fish stocks.
Vliv teploty a vodní aktivity na sdílení tepla u lístků petrželové natě v rozsahu teplot 10-30 °C
Effect of temperature and water activity on heat transfer in parsley leaves in the range of temperatures 10-30 °C
Jiří Štencl
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 181-186 | DOI: 10.11118/actaun200755050181
The equilibrium moisture contents of parsley leaves were measured by the gravimetric dynamic method with continuous recording of changes in sample weight. Consequently water activity values were determined. Henderson equation was found to be a good model both for moisture adsorption and desorption. Isosteric heat of sorption was defined and determined in the temperature range of 10-30 °C. Clausius-Clapeyron equation was used to calculate the isosteric heat of sorption since no dependence on temperature in the analysed range was observed. The isosteric heats of sorption (qnst) were indicated graphic in the form qnst...
SLEDOVÁNÍ ZMĚN SENZORICKÝCH VLASTNOSTÍ BÍLÝCH JOGURTŮ PO DOBU JEJICH MINIMÁLNÍ TRVANLIVOSTI
Changes monitoring of white yoghurts sensorial characteristic during their minimal endurance time
Hana Šulcerová, Květoslava Šustová
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 187-196 | DOI: 10.11118/actaun200755050187
Besides chemical and microbial parameters of white yoghurts, other quality indexes are also one of sensorial features. Products introduced in market have to fulfil set criteria. One of them is minimum endurance time. Of course, even during this period certain sensorial changes appear which can influence customer choice at repetitional purchase. Samples of white yoghurts of different fat proportion from different producers were evaluated by qualified staff. Samples were given to the lab right from the producer and assessed on their production day. Changes of particular descriptors were monitored depending on length of storage and fat proportion during...
MOŽNOSTI HODNOCENÍ TVRDOSTI ZRNA JEČMENE PŘÍSTROJEM DO-CORDER, JAKO PARAMETRU SLADOVÉ KVALITY
The evaluation of barley grain hardness measured by Do-Corder, as a malting quality parameter
Karel Vejražka
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 197-204 | DOI: 10.11118/actaun200755050197
There is a need for fast, cheap and sufficient accurate methods for prediction of barley grain quality. The determination of Brabender hardness seems to be promising. The aim of this work was to compare three different methods for evaluation of graphic output from Brabender farinograph and subsequently select the most optimal method for routine laboratory work. 108 samples (twelve cultivars from three localities and three years) were analyzed for grain hardness. Simultaneously selected parameters of grain and malt were determined. The correlations among methods for evaluation were estimated as well as among selected technological traits of barley grain...
Změny zásoby půdní organické hmoty v ornici a podorničí způsobené obilninami pěstovanými v osevních sledech
Changes in the soil organic matter supply in topsoil and subsoil caused by cereals grown in crop rotations
Vítězslav Vlček, Radomíra Střálková, Jitka Podešvová, Eduard Pokorný
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 205-210 | DOI: 10.11118/actaun200755050205
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 1st and 2nd 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...
VLIV KOROZE NA ÚNAVOVOU PEVNOST SVAROVÉHO SPOJE
Influence of corrosion on the fatigue strength of the weld joint
Michal Černý, Josef Filípek, Zbyněk Šoch
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 215-222 | DOI: 10.11118/actaun200755050215
The fatigue fractures represent the most frequent failure cause of the machines and machinery in general. Under cycling loading, the fracture is mainly propagating from the surface of the part - the place with highest value of stress concentration. Fatigue strength is decreased by presence of the cracks, inclusions and rugged surface. The paper is focused on monitoring of the crack propagation in weld and heat-affected zone during the fatigue test. Comparison of corrosion-free test samples and samples treated in the salt cabinet is presented.
Vhodnost termínu odběru vzorku révy vine pro testování GFLV a ArMV využitím ELISA metody
Suitability of the date of grapevine tissue sampling for tests of GFLV and ArMV presence using ELISA method
Pavel Pavloušek
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 223-228 | DOI: 10.11118/actaun200755050223
Grapevine fanleaf virus (GFLV) and Arabis mosaic virus (ArMV) are two important agents from the Nepoviruses genus. At present, serodiagnostic method is one of routine methods of virus pathogens testing also in grapevines. The aim of this study was to determine a suitable date of grapevine tissue sampling using the ELISA method and to follow visible symptoms of GFVL and ArMV infestation of vines. Positive results of tests for the occurrence of GFLV were obtained in the following growth stages: B (intensive growth - growth apex), C (beginning of flowering - young leaves) and D (beginning of flowering - inflorescence). Samples evaluated...
NETŘEBSKÉ TISY - JEJICH HISTORICKÝ A SOUČASNÝ STAV
Netreb's yews - their historical and present condition
Iva Roubíková
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 229-234 | DOI: 10.11118/actaun200755050229
Netřeb Natural Reservation (NR) was monitored in the frame of the project "Evaluation of historical and present state of common yew populations (Taxus L.) in the west part of Czech Republic to west from Vltava (river)". It was processed in the financial support of In - house Grant Agency at MUAF in Brno in the summer 2006. Netřeb is situated in harmonic landscape in the Domažlicko region. Netřeb yews are considered as the oldest together with Krompach yews in the Czech Republic. Dendrometrical methods and card comparison of the observation have used in this year. Interest is increment size of average perimeter 1.23 cm and tree height about 3.5...
Taxonomický status několika sibling species - parazitů člověka a jiných obratlovců
Taxonomic status of several sibling species - parasites in man and in other vertebrates
František Tenora
Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(5), 235-240 | DOI: 10.11118/actaun200755050235
The taxonomic status of several related species pairs of sibling species character is discussed. They are the following pairs: 1) Ascaris lumbricoides L., 1758; A. suum Goeze, 1782; 2) Rodentolepis nana (Siebold, 1852); R. fraterna (Stiles, 1906); 3) Hymenolepis flavopunctata (Weinland, 1858); H. diminuta (Rudolphi, 1819).