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Results 3661 to 3690 of 5716:

Species differentiation of thermotolerant Campylobacters based on distinctive banding patterns obtained by multiplex PCRFood Microbiology and Safety

Lucie VONDRÁKOVÁ, Sabina PURKRTOVÁ, Jarmila PAZLAROVÁ, Kateřina DEMNEROVÁ

Czech J. Food Sci., 2015, 33(1):27-31 | DOI: 10.17221/267/2014-CJFS

The differentiation of thermotolerant Campylobacter spp. on the species level (C. jejuni, C. coli, C. lari, and C. upsalien-sis) was provided. Identification is based on different banding patterns obtained for individual species during simple multiplex PCR where regions within the 23S rRNA gene are amplified using newly designed specific forward primers.

Efficacy and selectivity of pre-emergent sunflower herbicides under different soil moisture conditionsOriginal Paper

Miroslav JURSÍK, Josef SOUKUP, Josef HOLEC, Jiří ANDR, Kateřina HAMOUZOVÁ

Plant Protect. Sci., 2015, 51(4):214-222 | DOI: 10.17221/82/2014-PPS

We ranked the most frequently used pre-emergent herbicides in sunflower (Helianthus annuus) according to their efficacy and selectivity under different soil moisture conditions within 2008-2011. The efficacy of oxyfluorfen, aclonifen, acetochlor, dimethenamid, and propisochlor on the majority of weeds (Chenopodium album, Echinochloa crus-galli, Amaranthus retroflexus, Mercurialis annua,and Solanum physalifolium) was only slightly affected by the soil moisture and these herbicides can be used in arid and semiarid regions. The efficacy of linuron, prosulfocarb, and pethoxamid was strongly affected by soil moisture and was insufficient under dry conditions. The majority of herbicides showed good selectivity for sunflower. Crop injury rate of 5-15% was recorded after application of flurochloridone and acetochlor. For flurochloridone, the phytotoxicity increased due to irrigation after herbicide application. The highest sunflower injury rate (27-35%) was recorded after application of oxyfluorfen.

Nitrogen leaching and residual effect of barley/field bean intercroppingOriginal Paper

M. Mariotti, A. Masoni, L. Ercoli, I. Arduini

Plant Soil Environ., 2015, 61(2):60-65 | DOI: 10.17221/832/2014-PSE

Cereal/legume intercropping may improve resource use efficiency in agroecosystems and increase yield per unit surface area and yield stability. Two field bean (Vicia faba L.) and four barley (Hordeum vulgare L.) cultivars were mono- and intercropped (additive design) in a 2-year lysimeter experiment on a sandy loam soil. The aim was to test the effect of the cropping system on dry matter and N yield of forage, the residual effect on the subsequent ryegrass crop (Lolium multiflorum Lam. westerwoldicum), and NO3-N leaching in the rotation. Land equivalent ratios were 1.65 for dry matter and 1.67 for N yield, indicating a clear advantage of the intercrop over sole crops. Both species suffered from competition, especially in terms of N resources, but barley was less affected. Nitrate leaching was the lowest from intercrop. Preceding crop significantly affected dry matter, N content and NO3-N leaching of ryegrass. Field bean sole crop gave the highest benefits to ryegrass in terms of forage dry matter and N content, but also the highest NO3-N leaching, followed by the intercrop and the barley sole crop. Barley/field bean intercropping may be an effective strategy to reduce land requirements, N leaching losses and fertilizer inputs, thereby increasing the sustainability of farming systems.

The effect of sulphur fertilization on macronutrient concentrations in the post-harvest biomass of mustardOriginal Paper

K.J. Jankowski, Ł. Kijewski, S. Krzebietke, W.S. Budzyński

Plant Soil Environ., 2015, 61(6):266-272 | DOI: 10.17221/119/2015-PSE

The aim of this study was to determine the effect of sulphur (S) fertilization on macronutrient concentrations in the roots, straw and oil cake of white mustard and Indian mustard. The experiment was conducted in northeastern Poland (2006-2008). The highest content of N, P, K, Mg and S was noted in the oil cake of both mustard species. Sulphur fertilization increased S concentrations and had no effect on Mg concentrations in the roots of white mustard and Indian mustard. Sulphur fertilizers applied to soil significantly increased the content of N, K and Ca in the roots of Indian mustard, whereas they had no significant effect on the content of N, P and Ca, and decreased K concentrations in the roots of white mustard. Sulphur fertilization led to a significant decrease in N content, and an increase in the content of K and Ca in the straw of both mustard species. Sulphur fertilization significantly decreased P concentrations and increased S concentrations in the oil cake of both mustard species. In response to S fertilization, the content of N and K decreased in the oil cake of Indian mustard, but did not change significantly in the oil cake of white mustard. Therefore, S fertilization significantly differentiated the fertilizing value of post-harvest residues and the feeding value of white mustard and Indian mustard seeds.

Growth requirements of different potato cultivarsOriginal Paper

R. Bernik, I. Demsar, J. Potrpin

Plant Soil Environ., 2015, 61(12):553-559 | DOI: 10.17221/542/2015-PSE

A field trial with four potato cultivars (Faluka, Manitou, Madeleine and Stirling) was conducted in two consecutive years (2012 and 2013) at a laboratory field of Biotechnical Faculty in Ljubljana. The aim of the study was to evaluate different requirements of the selected cultivars in regard to the ridge and tuber cluster. The following parameters were defined and monitored: area of the form surrounding the tubers (ellipse), cross-sectional area of the ridge, vertical and horizontal tuber span in the ridge, the length of semi-axes (a) and (b) of the ellipse, minimum distance of tubers and ellipse from the outer ridge side. The results of 2012 trial indicated that the minimal ellipse method defining the ellipse was not satisfactory as statistical significance was limited due to a large volume of vacant space in the ridge not occupied by potato tubers. Therefore, the mathematical model was upgraded in 2013 and a physical parameter (tuber mass) was incorporated in the equation to better depict the tuber cluster. The trials were designed as a randomized block with five repetitions. The largest ellipse, horizontal tuber span in the ridge and the longest semi-axis (a) were recorded for the cv. Manitou resulting in the highest yield. However, no statistical differences were recorded in the horizontal tuber span, the length of the semi-axis (a) or cross-sectional area of the ridge among cultivars analysed. It was determined that different cultivars require specific growth space in the potato ridge. Moreover, the newly developed method proved efficient for determining growth requirements of potato tubers in the ridge.

Evidence of Anaplasma spp. exposure in native Korean goats (Capra hircus coreanae)Original Paper

S.H. Lee, B.Y. Jung, D. Kwak

Vet Med - Czech, 2015, 60(5):248-252 | DOI: 10.17221/8176-VETMED

Anaplasmosis in animals is caused by Anaplasma spp. including A. phagocytophilum, A. marginale, A. centrale, A. ovis, and A. bovis, which are obligate intracellular rickettsial pathogens transmitted by ticks. Infection in animals is considered an important constraint on livestock production. In Korea, the prevalence of Anaplasma spp. has been investigated in several species, including cattle, dogs, and rodents, but there are no available data on anaplasmosis in goats. The purpose of this study was to investigate the presence of Anaplasma spp. in native Korean goats (Capra hircus coreanae) using a commercial competitive ELISA which specifically detects antibodies against A. marginale, A. centrale, and A. ovis. A total of 36 (6.6%) of 544 goat serum samples tested seropositive for Anaplasma spp. With regard to age, 4.9% (7/144), 9.5% (27/283), and 1.7% (2/117) of samples tested seropositive in the young (< 1 year), adult (≥ 1 year), and unknown age groups, respectively, with significant differences among groups (P < 0.05). The seroprevalence by region was 1.7% (2/121), 2.6% (2/77), and 9.2% (32/346) in the northern, central, and southern regions, respectively, with significant differences among regions (P < 0.05). With regard to the season of sample collection, 3.3% (4/122) and 7.6% (32/422) samples tested seropositive during the cold and warm seasons, respectively. To the best of our knowledge, this is the first known study reporting the seroprevalence of Anaplasma spp. in native Korean goats. Despite the relatively low prevalence of Anaplasma spp. in native Korean goats compared with that in animals from other countries, these results should not be disregarded because infection with Anaplasma spp. in animals has long been recognised, and the potential for horizontal transmission cannot be excluded.

Effects of rubber-tired skidder and farm tractor on physical properties of soil in plantation areas in the north of IranOriginal Paper

M. Nikooy, S. Ahrari, A. Salehi, R. Naghdi

J. For. Sci., 2015, 61(9):393-398 | DOI: 10.17221/125/2014-JFS

Physical properties of soil can be affected by machines that are used for skidding which have the potential to impact soil sustainability and forest productivity. The present study evaluated the effect of timber skidding by a rubber-tired skidder and farm tractor on the soil physical properties. The study site was located in Hafdaghanan plantation region in the north of Iran. Two treatments that consisted of skidding by HSM 904 skidder and ITM285 farm tractor equipped with trailer were applied. The trails were included in three traffic levels: primary, secondary and tertiary. Treatment effects were tested using analysis of variance (ANOVA) with skidding machine types and traffic levels. Results indicated that machine type and traffic intensity are the effective factors on soil physical properties. The results showed that with an increase of traffic frequency, bulk density increased but total porosity and soil water content decreased. The results of the study provide clear evidence that farm tractor is a more environmentally friendly machine than rubber-tired skidder in the plantation area.

The "Breme" red onion: effects of home-storage methods on quercetin and quercetin-glycoside contentsFood Chemistry and Safety

Elena DOZIO, Alessandra BARASSI, Alessandro RAVELLI, Ilaria ANGELI, Franco LODI, Gian Vico MELZI d'ERIL, Massimiliano M. CORSI ROMANELLI

Czech J. Food Sci., 2015, 33(5):405-409 | DOI: 10.17221/622/2014-CJFS

The "Breme" onion is a red-skinned cultivar growing in the northwest Italy. To date, its nutrient composition has not been described. In this study, we quantified the contents of quercetin (Q) and its glycosides and we studied their stability in the dependence on the local home-storage methods storage at 4°C and freezing. Quercetin-3,4'-O-diglycoside (3,4'-Qdg) was the most abundant form, followed by quercetin-4'-O-diglycoside (4'-Qmg ) and Q. We observed the reduction in the contents of all the analysed flavonols after storage at 4°C and after storage in frozen state. No changes have been observed in the ratio Q/3,4'-Qdg + 4'-Qmg, as well as in 3,4'-Qdg /4'-Qmg between the fresh, stored at 4°C, and frozen onions. This could suggest an overall condition of instability, not the activation of a selective deglycosylation pathway. In conclusion, our study shows that the "Breme" onion is mainly rich in 3,4'-Qdg and that home-storage methods do not preserve the stability of some important health-promoting molecules.

Characteristics and risk factors of dog aggression in the Slovak RepublicOriginal Paper

R.E. Matos, T. Jakuba, I. Mino, M. Fejsakova, A. Demeova, J. Kottferova

Vet Med - Czech, 2015, 60(8):432-445 | DOI: 10.17221/8418-VETMED

Canine aggression is a widespread problem which receives a lot of attention from the media. It has important consequences in terms of public health and animal welfare. To address this issue it is necessary to first determine its epidemiological characteristics in the target population. This study was aimed at exploring the characteristics and determining the risk factors for dog aggression in the Slovak Republic and, in particular, for aggression directed at humans. For this purpose, we used a questionnaire directed to dog owners which included information about dog and owner characteristics, housing, training and fear behaviour. From the 177 analysed questionnaires, 67% portrayed dogs with some type of aggressive behaviour. Half of the animals showed some degree of owner-directed aggression and almost 40% were aggressive towards unfamiliar people. The approach of an unfamiliar male was the situation that stimulated most dogs to behave aggressively (33.3%) and a small percentage (2.3%) of the animals always showed aggression when approached by an unfamiliar child. Multivariate logistic regression models found that "owner's age" (OR, 0.96; 95% CI, 0.93 - 0.99) and "neuter status" (OR, 0.36; 95% CI, 0.13-0.98) were significantly associated (P < 0.05) with the exhibiting of aggressive behaviour in different contexts. "Dog's sex" (OR, 2.16; 95% CI, 1.09-4.27) and "type of training" (OR, 2.32; 95% CI, 1.19-4.80) were significantly associated (P < 0.05) with the exhibiting of aggressive behaviour towards familiar people. Younger owners were more likely to have aggressive dogs and neutered dogs were less likely to be aggressive in different contexts. Male dogs and dogs with informal training were more likely to be aggressive towards familiar people. Manifestations of fear were significantly associated with the expression of aggressive behaviour in all models. This study provides the first preliminary results on the characteristics and potential risk factors for human-directed aggression in Slovakia. The analysis of these data may help in determining which preventive measures should be given priority in this country.

Stem rust resistance in 1BL.1RS and 2RL.2BS double wheat-rye translocation linesOriginal Paper

Mahbubjon RAHMATOV, Larisa GARKAVA-GUSTAVSSON, Ruth WANYERA, Brian STEFFENSON, Matthew ROUSE, Eva JOHANSSON

Czech J. Genet. Plant Breed., 2015, 51(4):148-154 | DOI: 10.17221/80/2015-CJGPB

The wheat stem rust pathogen, Puccinia graminis f.sp. tritici, is a significant and devastating disease of wheat crops worldwide. Wheat has many wild relatives in which to source new resistance genes, including the cereal crop of rye in the tertiary genepool. The aim of this study was to assess the reaction of 1BL.1RS and 2RL.2BS double wheat-rye translocation lines to virulent stem rust races from Africa and North America. BC1F3 and BC1F4 populations from a cross between the line KR99-139 (a double wheat-rye translocation line with 1BL.1RS and 2RL.2BS) and the bread wheat cultivar Topper were used in the study. Several of the populations homozygous for 1BL.1RS and heterozygous for 2RL.2BS showed resistance and low severity adult plant resistance (20RMR-50MSS) to the African stem rust race TTKSK in the field. None of the tested populations with varying chromosome combinations showed seedling resistance to any of the tested stem rust races. Thus, these resistant populations likely carry gene/s effective at the adult plant stage since all stage resistance genes with major effect appear to be absent based on the seedling assays. Resistant lines combined three chromosomes (1RS, 2RS and 2BS) which make their direct use in breeding more complicated. Mapping studies followed by potential transfer of genes between 2R and 2B will make the identified minor genes more useful in wheat breeding.

Chemical fractions and bioavailability of nickel in alluvial soilsOriginal Paper

M. Barman, S.P. Datta, R.K. Rattan, M.C. Meena

Plant Soil Environ., 2015, 61(1):17-22 | DOI: 10.17221/613/2014-PSE

The present study was undertaken to sequentially fractionate nickel (Ni) in soils of divergent physicochemical characteristics and evaluate the contribution of different fractions towards plant uptake. For this, fifteen bulk surface (0-15 cm) soil samples were collected from the cultivated fields of northwestern Indo-Gangetic alluvial plains. A pot experiment was conducted with these soils to assess the contribution of soil Ni fractions to plant uptake using soybean as test crop. Results showed that residual Ni was the most dominant fraction in soil constituting 3.19-63.6% of total Ni. The water soluble plus exchangeable Ni accounted for only 0.70-4.04% of total soil Ni. Organically bound Ni varied from 1.60-6.85% of total Ni; these values are relatively lower as compared to those reported for temperate soils. Correlation studies showed that the free iron oxide (Fe2O3) and soil organic carbon correlated with various fractions of Ni in soil. Water soluble plus exchangeable and organically bound are the dominant fractions which contributed positively and manganese oxide (MnO2) bound and residual fractions contributed negatively towards the phytoavailability of Ni in soil.

Effect of zinc application timing on yield formation by two types of maize cultivarsOriginal Paper

J. Potarzycki, K. Przygocka-Cyna, W. Grzebisz, W. Szczepaniak

Plant Soil Environ., 2015, 61(10):468-474 | DOI: 10.17221/488/2015-PSE

The yield forming response of maize cultivar to zinc (Zn) application depends on its timing. This hypothesis was validated in 2007, 2008, 2009 and 2010 growing seasons. The zinc treatments as the first factor were: NPK; NPK + Zn applied before sowing; NPK + Zn applied to maize at the stage of 4th leaf. The second factor was the maize type: stay-green (modern cultivars) - Paroli, Veritis, Anamur; classical (old cultivars) - Inagua, Kirola. The grain yield of modern cultivars responded the best to zinc applied before sowing, whereas the old ones, when applied to foliage. The yield of the stay-green maize depended upon the number of kernels per row, whereas the classical one on all yield structural components. The zinc management in the modern cultivars should be oriented towards maximization of the number of kernels per row, whereas in the old one on its optimization with the simultaneous kernel weight increase. The positive impact of zinc application before sowing on dry matter translocation from vegetative tissues to growing kernels underlines its practical usefulness, especially in areas with frequent water shortage during maize growth.

Effects of a low-phosphorus diet and exogenous phytase on performance, egg quality, and bacterial colonisation and digestibility of minerals in the digestive tract of laying hensOriginal Paper

M. Englmaierová, M. Skřivan, E. Skřivanová, I. Bubancová, L. Čermák, J. Vlčková

Czech J. Anim. Sci., 2015, 60(12):542-549 | DOI: 10.17221/8596-CJAS

The objective of the experiment was to determine the effects of different levels of phytase (0, 150, 250, and 350 phytase units (FTU)/kg; F) produced by Aspergillus niger in the diets of hens fed decreased contents of non-phytate phosphorus (1.8 and 2.1 g/kg; NPP) on the hen performance, egg quality, digestibility of calcium and phosphorus in the ileum, and representation of bacterial species in the ileum and caecum. The diet with 2.1 g/kg of NPP and 350 FTU/kg significantly decreased egg weight (P < 0.001) and egg mass production (P < 0.001). However, this treatment had the highest values for shell percentage (P = 0.002), shell thickness (P = 0.006), and shell index (P = 0.003). The supplementation with F at 350 FTU/kg to the diet with 1.8 g/kg of NPP increased the shell quality to a level that was comparable with the eggs from the hens fed the diet with only 2.1 g/kg of NPP. With the addition of F (350 FTU/kg) to the mixed feed with 1.8 g/kg of NPP, the digestibility of calcium and phosphorus in the ileum increased by 6.1% and 7.4%, respectively, although the increases were not significant. Additionally, the frequency of Lactobacillus spp. was higher in the ileum and caecum of hens fed the diet enriched with F than in those fed a diet without F addition. The dietary manipulations with NPP and F improved some performance and shell quality characteristics, and the addition of 3-phytase at a level of 350 FTU per kg to the low-P diet increased the digestibility of minerals and changed the microflora of the digestive tract.

Potential microbiological threat to the Vistula waters by its tributaries in the vicinity of KrakówOriginal Paper

Anna LENART-BOROŃ, Monika PUCHAŁA, Piotr BOROŃ

Soil & Water Res., 2015, 10(2):130-136 | DOI: 10.17221/205/2014-SWR

The Vistula is the longest river in Poland. It stretches from the Silesian Beskids to the Gulf of Gdańsk. Water from the Vistula is the source of drinking water for many cities and is used in industry, and therefore its quality and microbiological purity is an important issue. The quality of water in the Vistula depends, among others, on the quality of water in its basin. The aim of this study is to assess microbiological hazard to the Vistula waters from its tributaries in the vicinity of Kraków. The analyses were carried out on 10 tributaries of the Vistula: Pr±dnik, Dłubnia, Drwina Długa, Drwinka, Raba, Uszewka, Szreniawa, Uszwica, Kisielina, and Dunajec. The examinations were carried out in four series, from May 2012 to March 2013. The numbers of coliforms, faecal coliforms, Enterococcus faecalis, and sulphate reducing Clostridium were determined using the membrane filtration method, while the serial dilutions method was used to determine the numbers of mesophilic and psychrophilic bacteria, Staphylococcus and Salmonella. There was a large variation in the number of microorganisms in the examined watercourses, however in most cases the water could be classified as clean, whereas waters of the Vistula in the vicinity of Kraków are microbiologically contaminated. Thus, the examined watercourses do not pose a serious threat to the quality of the Vistula. Among the analyzed tributaries, the waters of the Pr±dnik were characterized by the worst sanitary condition, while the best microbiological quality was observed in the Dunajec.

Cross border protection of the clusters' intellectual property in the agricultural sectorOriginal Paper

Mirjana KRANJAC, Uroą SIKIMIĆ, Marija VUJAKOVIĆ, Istvan MOLNAR

Agric. Econ. - Czech, 2015, 61(1):23-30 | DOI: 10.17221/130/2014-AGRICECON

The goal of the paper is to analyse the potential for the innovation of cross border clusters from the sector of agriculture. The methodology which is used is the research of intellectual property (IP) of the clusters' members and clusters by using a specific questionnaire for clusters in two countries: Hungary and Serbia. The analysis of results shows a high level of innovativeness within the clusters' members and the need of protection of their intellectual achievements. The similar results were achieved in both countries. They show that the IP rights at the level of clusters should be protected as the cross border trademark and the name of origin. The scientific contribution of this paper is to introduce the concept of the joint cross border IP protection for two or more clusters from different countries which might be applied across the EU.

Effects of inactivated Parapoxvirus ovis on polymorphonuclear leukocyte function and myeloperoxidase activity in horsesOriginal Paper

S. Ulgen, C.P. Yaramis, E. Rayaman, U. Soyogul Gurer, M.E. Or, A.O. Sehirli

Vet Med - Czech, 2014, 59(12):631-636 | DOI: 10.17221/7823-VETMED

Immunomodulatory products have been used for years in veterinary medicine. Inactivated Parapoxvirus ovis (iPPVO) is currently used in equine medicine as an immunomodulator to improve the immune system and as a prophylactic treatment to prevent or treat infectious diseases. This study was designed to determine the effects of iPPVO on polymorphonuclear leukocyte (PMNL) function (phagocytosis and intracellular killing activity) and the myeloperoxidase (MPO) activity of PMNLs in horses. Twenty-four healthy English thoroughbred horses with an average age of 11 years were included in the study. Venous blood samples (10 ml) were taken before (agent-free controls) and after the administration of iPPVO (2 ml i.m. injection on Days 1, 3, and 5). PMNLs (1 × 107 cells/ml) were isolated from venous blood containing EDTA (0.1 g/ml) with Ficoll-Hypaque gradient centrifugation. Cellular phagocytosis and intracellular killing activities were assayed using a modification of Alexander's method before and after treatment with iPPVO. MPO activity was also measured. The administration of iPPVO significantly increased the phagocytic, intracellular killing, and MPO activities of equine PMNLs (P = 0.0058, P = 0.0050, and P = 0.0070, respectively). This study demonstrates a strong correlation between MPO activity and PMNL function. The administration of iPPVO to horses has a supportive effect on their cellular immunity and an immunomodulatory effect against equine viral infections.

Prevalence of Trichinella spp. antibodies in wild boars (Sus scrofa) and domestic pigs in KoreaOriginal Paper

H.J. Kim, W.S. Jeong, E.M. Kim, S.G. Yeo, D.J. An, H. Yoon, E.J. Kim, C.K. Park

Vet Med - Czech, 2015, 60(4):181-185 | DOI: 10.17221/8105-VETMED

Trichinellosis is a parasitic zoonosis that is of importance to public health; human trichinellosis usually occurs when improperly cooked pork or wild animal meat is consumed. The purpose of this study was to determine the nationwide seroprevalence of Trichinella infection in wild boar and domestic pig populations in Korea. Using ELISA, we detected no seropositivity among the serum samples of 2350 domestic pigs collected in 2013, indicating that the domestic cycles of Trichinella spp. have disappeared from the domestic pig population in Korea. In contrast, approximately 13% of the 434 wild boars hunted in 2013 were seropositive. Furthermore, the seroprevalence of six of the seven provinces was between 6.7% and 18.3%, indicating that Trichinella infection occurred in the wild boar population throughout the country. The results of this study suggest that Trichinella circulates in the wild boar population and could be transmitted from infected wild boars to other wildlife, domestic pigs, and humans in Korea. Therefore, we recommend continued surveillance of Trichinella infection prevalence in wild animals and an appropriate strategy to prevent human infection in Korea.

Microbial contamination of paper-based food contact materials with different contents of recycled fiberFood Microbiology and Safety

Zuzana Hladíková, Kristina Kejlová, Jitka Sosnovcová, Dagmar Jírová, Adam Vavrouą, Stanislav Janouąek, Milada Syčová, Vladimír ©pelina

Czech J. Food Sci., 2015, 33(4):308-312 | DOI: 10.17221/645/2014-CJFS

Recycled paper is commonly used in food packaging industry, especially for disposable products. The material coming into direct contact with food products must not represent a source of contamination for food in accordance with the Framework Regulation (EC) No. 1935/2004 containing the general requirements on all food contact materials. In the present study, the microbial purity of 31 paper-based materials with different contents of recycled matter (0-100%) was evaluated using a standard method based on the disintegration of paper. The results of the present study indicate the existing relation between the use of recycled fibers and the content of microorganisms. The increased amount of recycled fibers significantly increased the amount of bacteria in the paper samples. The highest content of microorganisms was observed in the case of paper with the highest recycled fiber content. Total counts of bacteria ranged from 5.0 × 101 to 1.2 × 105 CFU/g. Moulds were detected only in three paper samples. As the microorganisms present in food packaging may penetrate into foodstuffs (particularly those with high contents of water or fat) and have an adverse effect on end-consumers' health, microbial criteria for food packaging should be included into the EU legislation.

Cocaine- and amphetamine-regulated transcript immunoreactive nerve fibres in the mucosal layer of the canine gastrointestinal tract under physiological conditions and in inflammatory bowel diseaseOriginal Paper

A. Rychlik, S. Gonkowski, M. Nowicki, J. Calka

Vet Med - Czech, 2015, 60(7):361-367 | DOI: 10.17221/8383-VETMED

The objective of this study was to determine the effect of canine inflammatory bowel disease (IBD) on the density of cocaine- and amphetamine-regulated transcript (CART) immunoreactive nerve fibres in the mucosa of different sections of the gastrointestinal tract. Fibre density was analysed in mucosal specimens from the duodenum, jejunum and descending colon of healthy dogs and patients with inflammatory bowel disease of varying intensity. Nervous fibres were stained in single-cell immunofluorescence assays. The density of CART-immunoreactive fibres was determined using a semi-quantitative approach by counting the number of fibres in the field of view (0.1 mm2). An increase in the density of CART-immunoreactive fibres was observed in dogs with moderate and severe IBD in comparison with healthy subjects. The results suggest that the presence of CART in enteric nerve fibres could play a role in the pathogenesis and development of canine IBD.

Evaluation of selected Cucumis sativus accessions for resistance to Pseudoperonospora cubensis in EgyptOriginal Paper

Elmahdy Ibrahim METWALLY, Mohamed Tawfik RAKHA

Czech J. Genet. Plant Breed., 2015, 51(2):68-74 | DOI: 10.17221/12/2015-CJGPB

Downy mildew [Pseudoperonospora cubensis (Berk. & Curt.) Rostov] is a major destructive disease of cucumber (Cucumis sativus L.) worldwide. Resistant cultivars were recently introduced into Egypt, but yield losses were high if no fungicides were used. The objective of this study was to identify sources of resistance to downy mildew among Plant Introduction (PI) cucumber accessions from the U.S. National Plant Germplasm System. We evaluated 133 such accessions for downy mildew resistance under natural field epidemics during the summer 2013 at El-Beheira Governorate, Egypt. Mean ratings for downy mildew leaf damage ranged from 1 to 9 on a 0 to 9 scale. We classified 18 PI accessions (13.5%) as highly resistant (rating of 1.0-2.0), 46 (34.5%) as moderately resistant (rating 2.1-4.0), 40 (30%) as intermediate (rating 4.1-6.0), 12 (9%) as moderately susceptible (rating 6.1-7), and 17 (13%) as highly susceptible (rating > 7.1). The most resistant PI accessions were PI 432870, PI 432873, PI 432878, PI 432884, and PI 432886 with a rating of 1, which originated from China. The most susceptible PI accessions were Ames7736, PI 211979, PI 288991, PI 288992 and PI 289698 with a rating of 9. The five most resistant and five most susceptible accessions were further evaluated in replicated experiments during the summer 2014. Results from the repeated test confirmed the results from the first screening. No PI accession was found immune to downy mildew. However, high levels of resistance were observed in several PI accessions that could be useful for the breeding for resistance to P. cubensis in cucumber.

Variability in macroelement content in the aboveground part of Helianthus tuberosus L. at different nitrogen fertilization levelsOriginal Paper

B. Sawicka, D. Kalembasa, D. Skiba

Plant Soil Environ., 2015, 61(4):158-163 | DOI: 10.17221/956/2014-PSE

The contents of nitrogen (N), potassium, phosphorus, calcium, magnesium and sodium were estimated in tubers of Jerusalem artichoke Helianthus tuberosus coming from the field experiment conducted over 2010-2012. The experimental factors were the cultivars of Jerusalem artichoke cvs. Albik and Rubik and different nitrogen fertilization levels, against phosphorus and potassium fertilization and the full dose of manure. Determination of elements in the soil and the dry weight of the aerial parts are performed by standard methods. When using a fixed level of phosphorous-potassium fertilizer, the highest sodium content was obtained at a level of 50 kg N/ha, magnesium and sulphur at a dose of 100 kg of N, nitrogen - 150 kg N/ha, potassium and calcium - in the objects of fertilizer phosphorus-potassium, and phosphorus - in the building control without fertilization. Cv. Albik proved to be more abundant in mineral elements than cv. Rubik. The latter was characterized by a higher stability of characteristics.

Computed tomography-guided cementoplasty combined with radiation therapy for an aneurysmal bone cyst in a dog: a case reportCase Report

M. Vignoli, L. Stehlik, R. Terragni, L. Cavallo, P. Proks

Vet Med - Czech, 2015, 60(2):109-114 | DOI: 10.17221/7986-VETMED

Aneurysmal bone cysts are expansile osteolytic bone lesions that can manifest clinically as lameness, pain and swelling. In humans, aneurysmal bone cysts are considered benign tumours that have been classified as primary or secondary to a previous coexisting lesion. Local recurrence after treatment or malignant transformation has been reported in both humans and in a dog. Different treatment options have been proposed. This report describes the treatment of an 11-month-old Irish wolfhound with an aneurysmal bone cyst with a combination of computed tomography-guided cementoplasty and radiation therapy, 30 Gy delivered in 10 fractions. The dog recovered completely, with no lameness observed 30 months after treatment.

Influence of different essential oils on refrigerated fish patties produced from bonito fish (Sarda sarda Bloch, 1793)Food Analysis, Food Quality and Nutrition

Husnu Sahan GURAN, Gulsum OKSUZTEPE, Ozlem Emir COBAN, Gokhan Kursad INCILI

Czech J. Food Sci., 2015, 33(1):37-44 | DOI: 10.17221/188/2014-CJFS

The effects of different concentrations of thyme (group T), clove (group Cl), and rosemary (group R) extracts on the microbiological, chemical, and sensory attributes of fish patty made from the bonito fish (Sarda sarda Bloch, 1793) were investigated. The numbers of total mesophilic aerobic bacteria, coliform bacteria, Staphylococcus-Micrococcus spp. and yeasts and moulds in group R were lower than those of the other groups during storage (P < 0.05). During the storage period, total volatile basic nitrogen (TVB-N), thiobarbituric acid index (TBA-i), peroxide values, and free fatty acid content gradually increased in all groups, and significant differences were found between the groups (P < 0.05). The results of sensory evaluation showed that the shelf life of fish patties was 4 days for the control group, and 8, 10, and 14 days for the groups treated with thyme, clove and rosemary essential oil, respectively (P < 0.05). In conclusion, the addition of essential oils showed a positive effect on the product shelf-life; and in particular, rosemary essential oil produced a remarkable effect.

Laparoscopic abomasal cannulation in sheepOriginal Paper

S.X. Zhang, K. Fu, X.Y. Chi, J.T. Zhang, L. Gao, H.B. Wang

Vet Med - Czech, 2015, 60(6):314-322 | DOI: 10.17221/8246-VETMED

Abomasal cannulation, an important research tool in experimental procedures, provides a method for the placement of an abomasal cannula in sheep. The aim of this study was to describe a technique for laparoscopic abomasal cannulation in sheep. It was performed in six anaesthetised sheep positioned in dorsal recumbency using three portals in the abdomen. The first absorbable traction suture was placed 1 cm cranial to the determined abomasal cannula site. A stab incision was made with a laparoscopic monopolar hook electrode in the middle of a purse-string suture placed around the abomasal cannula site. The T-shaped cannula was inserted into the abomasum lumen through the stab incision, and the second traction suture was then placed 1 cm caudal to the abomasal cannula site. The T-shaped abomasal cannula was pulled out of the abdominal cavity through the exit wound located 3-5 cm lateral and 10-12 cm cranial to the right side of the umbilicus. The two traction sutures were tied. The T-shaped cannula was secured to the skin with a finger-trap suture. Repeat laparoscopy was performed 1 month later. Firm adhesion between the abomasum and abdominal wall was observed in all sheep, with no evidence of leakage or peritonitis. No major intraoperative or postoperative complications were encountered. The median surgical time was 49 min, with a range from 42 to 58 min. The abomasal contents were collected easily. In conclusion, laparoscopic abomasal cannulation is safe and easy to perform. Its low complication rates and the "ideal" placement of the tube into the abomasum make it an especially attractive alternative to traditional surgical abomasal cannulation in veterinary practice.

Serological and molecular detection of Anaplasma phagocytophilum in horses reared in KoreaOriginal Paper

S.H. Lee, K.T. Kim, S.H. Yun, E. Choi, G.H. Lee, Y.S. Park, K.H. Cho, S. Yi, O.D. Kwon, T.H. Kim, D. Kwak

Vet Med - Czech, 2015, 60(10):533-538 | DOI: 10.17221/8491-VETMED

The objective of this study was to investigate the nationwide prevalence of Anaplasma phagocytophilum in horses reared in Korea using a commercial ELISA kit and two different nested PCR (nPCR) analyses. Our analysis showed that 2.9% (true prevalence: 3.1%, 16/549) of the horses were seropositive by ELISA, and none were positive by the two nPCR analyses. Significant differences were observed in the ELISA results when the data were analysed according to breed and geographic region. In light of a recent case of human granulocytic anaplasmosis in Korea and the predicted increase in the number and distribution of ticks due to global warming, continuous monitoring and appropriate control programs for Anaplasma spp. and other tick-borne pathogens need to be established.

Communities of oribatid mites and heavy metal accumulation in oribatid species in agricultural soils in Egypt impacted by waste water

Hamdy Mahmoud EL-SHARABASY, Ahmed IBRAHIM

Plant Protect. Sci., 2010, 46(4):159-170 | DOI: 10.17221/31/2010-PPS

The continued use of waste water for irrigation of agricultural fields in Egypt may lead to accumulation of heavy metals in soils and adverse effects on soil-living communities. We investigated responses of oribatid communities to heavy metal contamination in mango plantations irrigated by the Ismailia canal in the Suez region. Mean concentrations of heavy metals determined in irrigation water were considerably above the recommended levels. Concentrations of metals in agricultural soil were however below the permissible levels. A comparison with concentrations of a typical uncontaminated soil in this area revealed that the Ismailia water canal used for irrigation of agricultural land has elevated levels of heavy metals. The results of our ecological survey showed that the abundance and structure of the soil oribatid communities were not influenced by levels of heavy metals in the soil. We also showed that the diversity index can be a valuable tool for assessing the possible impact of pollutants on different species of oribatid mites. The oribatid species appeared to be accumulating different amounts of heavy metals when characterised by their bioconcentration factors. Most species were poor zinc accumulators. The accumulation of heavy metals in the body of oribatids was not strictly determined by their body size or by the trophic level. In conclusion, our study showed that mango plantations impacted by waste water from the Ismailia canal are accumulating heavy metals in their soils above the background concentrations, but ecological effects on soil-living communities are not apparent yet.

Management of maize stand height using growth regulatorsOriginal Paper

Tomáą SPITZER, Petr MÍ©A, Jan BÍLOVSKÝ, Jan KAZDA

Plant Protect. Sci., 2015, 51(4):223-230 | DOI: 10.17221/105/2014-PPS

Effect in reducing maize plant height using growth regulators ethephon, chlormequat chloride (CCC), CCC + ethephon, and mepiquat chloride + prohexadione-Ca was studied in field experiments during 2010 and 2011. It was found that maize plant height could be reduced by as much as 125 cm (49% of control) using a double application of ethephon (576 g a.i./ha) at growth stages BBCH 18-19 and BBCH 34-36. The other growth regulators displayed weak or no influence. An optimum level of shortening was achieved using ethephon (576 g a.i./ha) at BBCH 34-36 (reducing plant height by 40-90 cm), but it is necessary to count upon yield loss of 0.5-0.6 t/ha.

Soil characteristics and crop yields under different tillage techniquesOriginal Paper

G. Mühlbachová, H. Kusá, P. Růľek

Plant Soil Environ., 2015, 61(12):566-572 | DOI: 10.17221/567/2015-PSE

The field experiment with different soil tillage treatments has been carried out in Prague-Ruzyně locality (Czech Republic) since 1995. Data of two growing cycles in the years 2007-2010 and 2011-2014 were evaluated. Tillage technique was decisive for changes in soil characteristics and crop yields. Bulk density, organic carbon (Corg) and microbial biomass C (Cmic) were more equilibrated throughout all tested soil layers (0-0.1; 0.1-0.2 and 0.2-0.3 m) in conventional tillage (CT). In reduced tillage (RT) and no-tillage (NT) treatments significant accumulation of Corg and increase of Cmic in the surface layer were found, compared to CT. No significant differences in Corg and Cmic between two growing cycles were determined; however, mostly higher values were obtained in the top layer of NT during the second growing period. Higher bulk density under conservation tillage techniques did not negatively affect soil characteristics and should be taken in consideration for data evaluation as it can alter interpretation of their changes in the soil profile. Crop yields were comparable in CT and RT. Yield decrease in NT was mostly observed for winter wheat and pea. Beneficial effects of RT and NT conserving soil moisture on crop yield were not observed in dry years.

Evaluation of platelet function in horses undergoing colic surgery using the PFA-100 platelet function analyserOriginal Paper

A. Iwaszko-Simonik, S. Graczyk

Vet Med - Czech, 2015, 60(9):476-482 | DOI: 10.17221/8438-VETMED

Acute colic in horses, especially presentations requiring surgical correction, such as large colon volvulus, very often involves defective or excess platelet activation. The PFA-100 is a new point-of-care analyser that evaluates platelet function by measuring closure time (CT) in the whole blood of healthy horses in a standardised manner. However, there are no reports on platelet function in horses with colic measured by the PFA-100. The aim of the present study was to investigate platelet function in a group of horses suffering ascending colon displacement (ACD) and who underwent surgery compared to a group of control (C) horses. Thirty ACD cases and twenty untreated clinically healthy control horses were included. Blood samples were collected from the ACD horses prior to and 24, 48 and 72 h after laparotomy. Red blood cell count (RBC), haematocrit (HCT), haemoglobin (Hb) concentration, white blood cell count (WBC), total plasma protein (TP) concentration, platelet count (PLT), platelet volume (MPV) and ADP closure time (CT-ADP) were measured. CT was determined on a PFA-100® device using collagen/ADP cartridges. There were no significant differences in RBC, PLT and MPV between C and ACD horses pre-operatively. Reduced PLT was observed in the post-operative period. The mean CT-ADP of C horses was 96.43 ± 12.53 and 91.43 ± 2.51 seconds in the ACD group prior to surgery. CT-ADP was changed after surgery whereby CT-ADP time was more than doubled. We conclude that the PFA-100® can be used to detect platelet function defects in horses.

Selecting plants with increased total polyphenol oxidases in the genus TrifoliumOriginal Paper

Hana JAKE©OVÁ, Jana ŘEPKOVÁ, Jan NEDĚLNÍK, David HAMPEL, Jana DLUHO©OVÁ, Martina SOLDÁNOVÁ, Martina O©«ÁDALOVÁ

Czech J. Genet. Plant Breed., 2015, 51(4):155-161 | DOI: 10.17221/107/2015-CJGPB

One of the aims in red clover (Trifolium pratense) breeding is to increase the polyphenol oxidase (PPO) activity, which may effectively reduce protein breakdown in silage and when cattle are fed by fresh clover. We analysed total PPO activity spectrophotometrically and on the level of gene expression using real-time quantitative PCR in single plants derived from an interspecific T. pratense × T. medium hybrid. Experiments were performed for two years and evaluated according to the general linear model with three factors (family, year, and cut). The analysis revealed considerable variability in total PPO activity between individuals and between families. Four families and two individuals with significantly higher PPO activity were selected. Their PPO activity ranged from 3.411 to 3.547 mkatal/min/g and from 4.041 to 5.731 mkatal/min/g, respectively, in comparison with the control variety Amos (2.370 mkatal/min/g). The majority of PPO transcripts were expressed by the two genes PPO1/5 and PPO2. In some genotypes, the PPO5 gene was expressed. Quantitative PCR confirmed the highest activity of PPO genes in seven hybrid plants with higher DNA contents corresponding to 30 chromosomes with 815 013 copies per plant. Our results indicate the suitability of combining two methods for improved selection: initial expression analysis to assess the PPO transcript level indicating gene activity and subsequent enzymatic assay.

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