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Results 5251 to 5280 of 5824:

Effect of selected fattening performance and carcass value traits on textural properties of beef

J. Sochor, J. Simeonovová, J. Šubrt, J. Buchar

Czech J. Anim. Sci., 2005, 50(2):81-88 | DOI: 10.17221/3999-CJAS

Fifty-one crossbreed young bulls, progenies of Charolais (CH), Czech Pied (CP), Simmental (SI) and Blonde d'Aquitaine (BA) beef cattle bred at the paternal position crossed by Czech Pied at the maternal position, were reared in a typical production system and slaughtered at an average age of 578 days and live weight of 656 kg. The animals were evaluated for fattening performance and carcass quality traits (live weight at slaughter, age at slaughter, total weight gain, carcass weight, dressing percentage, net daily gain) and meat quality characteristics (dry matter, proteins, fat, ash, pH48, water holding capacity, remission, collagen, area of M. longissimus dorsi and cooking loss). Correlation coefficients were determined in order to discover which of the above-mentioned characteristics influenced textural properties measured by Warner-Bratzler (WB) shear device and compression test (TPA). It can be concluded from the overall assessment of the correlation coefficients that slaughter age (r = 0.68, P < 0.001), net daily gain (r = -0.54, P < 0.001), average lifetime daily gain (r = -0.50, P < 0.001) and pH48 (r = -0.51, P < 0.001) had the major influence on the textural properties measured by WB shears. Meat texture expressed by TPA was mainly influenced by live weight at slaughter (r = 0.55, P < 0.001), carcass weight (r = 0.50, P < 0.001) and pH48 (r = -0.54, P < 0.001). Significant differences (P < 0.001) were found out for the age at slaughter (CH × BA) and (CP × BA), slaughter weight (CP × SI) and (CP × BA) and carcass weight (CP × BA). At the same level of significance further differences were found out for pH48 and water holding capacity (CP × SI), (CP × BA) and cooking loss (CH × CP). Highly significant differences (P < 0.01) in the textural properties (measured by WB shears) were determined between the following breeds: (CH × BA) and (CP × BA). At the level of significance P < 0.05, the highest differences were identified between (CH × SI) and (CP × SI). TPA test showed statistically significant differences between (CH × CP), (CP × SI) breeds at the level P < 0.05.

The use of molecular markers for characterisation of spring barley for breeding to Fusarium head blight resistance

M. Špunarová, J. Ovesná, L. Tvarůžek, L. Kučera, J. Špunar, I. Hollerová

Plant Soil Environ., 2005, 51(11):483-490 | DOI: 10.17221/3621-PSE

Fusarium head blight (FHB) is a barley disease, which occurs every year in various areas of barley cultivation all over the world and the increasing incidence has been confirmed in the Czech Republic also during the last years. We aimed to emply AFLP (Amplified fragment length polymorphism) and SSR (Single sequence repeats) markers to describe diversity among breeding lines with a sufficient level of resistance towards FHB and to find marker(s) associated with the analysed traits. The number of eight accessions including five expected resistance donors and three sensitive lines were tested in the field and laboratory. The field values and the amount of deoxynivalenol were positively correlated (r = 0.92). The laboratory test and content DON manifested also a high correlation (r = 0.73). Several DH lines developed from androgenetic barley progenies of the F1 hybrids between the susceptible line PI 383933 and resistant line PEC 210 or the susceptible line PI 383933 and resistant cultivar Chevron were found resistant towards Fusarium infection in both the field and laboratory tests. Low infestation was found at line DH 37 from combination Chevron × PI 383933 and lines DH48, DH49, DH50 and DH55 from the combination PEC 210 × PI 383933. Cluster analyses based on 68 AFLP and 18 SSR markers demonstrate a genetic relationship among parental genotypes and DH lines.Some DH lines combined a sufficient degree of resistance against FHB and extract content (basic parameters malting quality). Statistically significant differences in malt-extract values were observed between groups of the DH lines possessing and not possessing the AFLP marker CAA/AGC 341bp. The markers will be further evaluated and optionally used for MAS.

Organic agriculture as one of aspects of multifunctional agriculture

I. Brožová

Agric. Econ. - Czech, 2005, 51(2):51-56 | DOI: 10.17221/5076-AGRICECON

The incorporation of Czech agrarian sector in the Common Agricultural Policy of the EU means also the application of so called "European Model of Agriculture" which reacts to a basic requirement of socially balanced and sustainable agriculture which contributes to maintenance and an improvement of the European agricultural cultural landscape. In connection with it, a new strategy of agrarian policy was set according to which the orientation of Czech agrarian sector changes in a principal way, which was focused up to now only on the production function and also its other functions become more important, above all in the environmental and social, so non-production area. One of the aspects of multifunctional agriculture is an organic agriculture, a system which fulfills visions of sustainable agriculture.

Possibilities of pre-emergence and post-emergence herbicide applications in Prunella vulgaris L. growth

J. Neugebauerová, K. Petříková

Hort. Sci. (Prague), 2004, 31(3):115-118 | DOI: 10.17221/3803-HORTSCI

Possibilities of herbicide applications to the self-heal (Prunella vulgaris L.) growth were tested in 1997-1998. Experiments showed that the application of pre-emergence herbicides in the Prunella vulgaris L. growth was efficient when 3 l/ha ofherbicide with 500 g/lisoproturon as an active ingredient were used. Herbicide applications had no influence on the emergence rate of direct seeding. Among the post-emergence herbicides it is possible to use glyphosate-IPA in 50% concentration by the wick applicator to Elytrigia repens (L.) Nevski. The results of these experiments can be used as a basis for testing the herbicide biological efficacy in the framework of minority indications for cultivated medicinal plants. .

Regional development in Slovakia - developmental trends and social-spatial impacts

P. Gajdoš

Agric. Econ. - Czech, 2005, 51(6):257-264 | DOI: 10.17221/5105-AGRICECON

The study deals with the problems of regional development in Slovakia, with the emphasis on presentation and critical reflexion of specific features and basic developmental tendencies characterizing the regional development in the transformation period (after 1990). The regional development is presented in broader social contexts of the development of the Slovak society, with the emphasis on its modernization stage, as well as the social-economic and social-spatial changes, characterizing the society development in the transformation period. The social and social-spatial implications and impacts of this development on social segments of the society, territorial and regional units and their social potentials are pointed out. In the conclusion, the dispositions of the regions and the developmental trends of the regional development of Slovakia are confronted with the conditions for the information society development.

Significance of different types and levels of antigen-specific immunity to Actinobacillus pleuropneumoniaeinfection in piglets

K. Nechvatalova, P. Knotigova, J. Krejci, M. Faldyna, E. Gopfert, P. Satran, M. Toman

Vet Med - Czech, 2005, 50(2):47-60 | DOI: 10.17221/5596-VETMED

The aim of the study was to verify under experimental conditions the hypothesis that a reliable protection of piglets against Actinobacillus pleuropneumoniae (App) infection can be obtained by colostrum-derived antibodies and/or a low-dose infection from sows naturally infected with App. Twenty-eight piglets were allocated into four groups. Piglets of groups 1A and 1B were the progeny of App-seronegative sows, piglets of groups 2A and 2B originated from App-seropositive sows. At the age of 4 weeks, piglets in groups 1A and 2A were exposed to a low infection dose with the pathogenic strain of App serotype 9 (4 × 104 CFU/ml). At the age of 8 weeks, all four groups of piglets were exposed to the App serotype 9 challenge (2.5 × 107 CFU/ml). We compared the differences in clinical, radiological, pathological changes and cytological findings in blood and bronchoalveolar lavage samples between groups with different levels of antigen-specific immunity after challenge. Piglets that obtained colostrum-derived antibodies and experienced a low-dose App infection were best protected against App challenge. More apparent clinical and pathological changes were observed in groups protected with either only colostrum-derived antibodies or active immunity induced by a preceding low-dose infection. However, none of the types of protection prevented developing of the disease and characteristic changes in the lungs. Cell counts changes in blood and lavage gave evidence of only bacterial infection in progress; however, between-group differences were not marked. Antibodies (IgG, IgA) present in the respiratory tract at the time of challenge played a major role in protection against App infection.

Enhanced hypericin production in Hypericum perforatum and Hypericum pruinatum in response to inoculation with two fungal pathogens

Cüneyt Çirak, Hasan Murat Aksoy, Ali Kemal Ayan, Saglam Birsen, Kevseroglu Kudret

Plant Protect. Sci., 2005, 41(3):109-114 | DOI: 10.17221/2725-PPS

Recent years has seen increasing interest in the genus Hypericum because it is the source of a variety of compounds and the biological activities of the genus are mainly derived from its hypericin content. The present study was conducted to determine whether this compound may be implicated as part of an inducible plant defense response in H. perforatum and H. pruinatum. Greenhouse-grown plants were inoculated with the plant pathogens Phytophthora capsici and Diploceras hypericinum. Hypericin levels of the Hypericum species increased significantly in response to inoculation with both pathogens. While up to now little effort has been made to determine whether hypericin is inducible by pathogen/herbivore attack or if it could play a role in plant defense, the present study indicates that hypericin is a component in inducible plant defense response of H. perforatum and H. pruinatum.

Land market development in the Czech Republic

E. Vrbová, J. Němec

Agric. Econ. - Czech, 2005, 51(5):216-220 | DOI: 10.17221/5098-AGRICECON

Land market in the Czech Republic is monitored by the Research Institute of Agricultural Economics on the sample of 24 districts (1/3 of the CR). Land prices depend on the area, culture and region of the plot. Sales of small plots (up to 1 ha) prevail. These plots are usually purchased for non-agricultural use and their prices are many times higher than prices of large plots (above 5 ha) which are usually bought for agricultural purpose. Land market is not well developed, only 0.2-0.4% of the monitored area is sold each year. But in the last years, it is increasing. Compared with land prices in the west EU countries, land market prices in the CR are low.

Production of Norway spruce (Picea abies [L.] Karst.) seedlings on substrate mixes using growth stimulants

M. Slávik

J. For. Sci., 2005, 51(1):15-23 | DOI: 10.17221/4540-JFS

We evaluated the growth of Norway spruce (Picea abies [L.] Karst.) seedlings on peat and bark substrates, on their mixes and on their mixes with agroperlite. We examined the basic quantitative traits (seedling diameters and heights), the number of produced seedlings per unit area, main root lengths, number of axial shoots and dry weight of shoots and roots. Besides the study of substrate influence on the biometrical characteristics of seedlings applied standard fertilisation an experiment was established as the second variant where the effect of biostimulants was tested; they were supplied by the Jaminex Company. The experiment was established with three replications by standard technologies used in forest operations. A conclusion can be drawn that in our experiments peat was found to be the most suitable substrate for production of Norway spruce seedlings. Positive effects of biostimulants were highly significant on almost all tested substrate mixes.

About phytopathological and histological aspects of Norway spruce dieback in the Orlické hory Mts.

M. Čermák, M. Martinková, D. Palovčíková, L. Jankovský

J. For. Sci., 2005, 51(8):348-358 | DOI: 10.17221/4570-JFS

The condition was evaluated of tissues of declining young spruce stands in selected localities of the Orlické hory Mts. It refers to stands occurring in top parts affected by an air pollution disaster in the last century. Several types of damage of a different symptomatic character were distinguished. A high NOx input appears to be the risk factor of spruce dieback in the Orlické hory Mts. One of the main causes in the complex of factors is the unbalanced cause of meteorological factors during the year and unbalance in mineral nutrition. The result is decrease in lignification, immaturity of tissues before the winter period and increased susceptibility of damaged tissues to parasites. Several potentially pathogenic species of micromycetes have been identified which can be considered to be significant pathogenic agents in case of declining spruce in the Orlické hory Mts., however, not a main cause.

Monitoring of antibiotic resistance in isolates of Actinobacillus pleuropneumoniaein the Czech Republic between 2001 and 2003

K. Nedbalcova, P. Satran, Z. Jaglic, R. Ondriasova, Z. Kucerova

Vet Med - Czech, 2005, 50(5):181-185 | DOI: 10.17221/5613-VETMED

During the period of 2001 and 2003 a total of 238 isolates of Actinobacillus pleuropneumoniae obtained from 26 pig herds in the Czech Republic (2001 - 73 isolates, 2002 - 110 isolates, 2003 - 55 isolates) were examined for antibiotic resistance by disc diffusion method. Resistance to erythromycin (95.5% to 98.6%), streptomycin (76.4% to 82.7%) and tiamulin (72.7%) was detected most frequently over the whole monitored period. High increase in percentage of resistant isolates to tetracycline (2001 - 11.0%, 2002 - 36.4%, 2003 - 81.8%), doxycycline (2001 - 9.6%, 2002 - 34.6%, 2003 - 61.8%), nalidixic acid (2001 - 2.7%, 2002 - 14.5%, 2003 - 45.5%), and norfloxacin (2001 - 0%, 2002 - 7.3%, 2003 - 34.6%) was found, while differences in resistance to cephalotine (2001 - 1.4%, 2002 - 7.3%, 2003 - 9.1%), cotrimoxazol (2001 - 4.1%, 2002 - 10.0%, 2003 - 7.3%), amoxicillin (2001 - 12.3%, 2002 - 12.7%, 2003 - 10.9%) and amoxicillin-clavulanic acid (2001 - 9.6%, 2002 - 9.1%, 2003 - 10.9%) were small. Prevalence of isolates resistant to sulfasomidine was detected decreasing (2001 - 43.8%, 2002 - 47.3% and 2003 - 29.1%).

Haematology and plasma chemistry of Bornean river turtles suffering from shell necrosis and haemogregarine parasites

Z. Knotkova, S. Mazanek, M. Hovorka, M. Sloboda, Z. Knotek

Vet Med - Czech, 2005, 50(9):421-426 | DOI: 10.17221/5643-VETMED

Nine Bornean river turtles (Orlitia borneensis, Gray, 1873) suffering from lethargy, ulcerations and caseous necrosis of the plastron were evaluated for haematology and plasma chemistry. Intra-erythrocytic haemogregarine parasites were associated with anaemia, low haemoglobin, basophilia, eosinophilia, heterophilia and azurophilia. After eight months of treatment consisting of antibiotics, debridement and scrubbing of lesions with enilconazole or povidone iodine, rehydration, deworming and tube feeding, lymphocytes, basophils, eosinophils, heterophils and azurophils returned to the normal ranges. Haematocrit, RBC and haemoglobin concentration were under the normal ranges in 24 months. A progressive decrease in haemogregarine parasitaemia was also seen, however, haematologic changes could not be definitely attributed to these parasites.

Infestation of poppy cultures with the poppy stem gall wasp (Timaspis papaveris) Cynipidae: Hymenoptera

Josef Šedivý, Pavel Cihlař

Plant Protect. Sci., 2005, 41(2):73-79 | DOI: 10.17221/2746-PPS

The mortality of pupae in stems lying on the ground during hibernation was 51.7% in 2003. The emergence of adults in 2003 and 2004 was monitored from late April to early July by photoeclectors placed on fields that grew poppy the previous year. Most adult gall wasps emerged in April to early May 2004. The occurrence of females ovipositing on poppy stems varied from April to July and the degree of damage to the plants increased. Most frequently the females oviposited in the first stem internodes. The infestation of poppy cultures with the gall wasps was almost uniform, the number of infested plants increasing still in June. In late June, only seven out of 600 plants were not infested. Green sticks covered with non-coagulating glue and placed in the poppy field, indicated the stem heights frequented by ovipositing females. The gall wasp larvae were parasitised by Trichomalus bracteatus Walker and Pseudotorymus papaveris Ruschka, with T. bracteatus predominating. Most frequently, gall wasp larvae inside the seventh internode were parasitised by this species.

Alleles controlling apple skin colour and incompatibility in new Czech apple varieties with different degrees of resistance against Venturia inaequalis CKE.

M. Melounová, P. Vejl, P. Sedlák, J. Blažek, J. Zoufalá, Z. Milec, H. Blažková

Plant Soil Environ., 2005, 51(2):65-73 | DOI: 10.17221/3557-PSE

The skin colour of 21 varieties was assessed on a molecular level. Four varieties had yellow skin colour with the genotype constitution a1a1, a1a2 or a2a2. Seventeen varieties had dominant red colour. Homozygous A1A1 constitution was present in 7 varieties, and heterozygous constitution A1a1 or A1a2 was found in the rest of the assessed varieties. The S-alleles controlled the incompatibility system of the pistil. Their detection is possible by means of the PCR method on the basis of allele specific primers. Six S-alleles (S1, S2, S3, S5, S7 and S9) were studied in the same collection of 21 diploid Czech varieties. This paper brings new findings on S-allele characterization, because the Czech varieties have not yet been studied on a molecular level. Both types of S-allele were found in 12 varieties. Only one type of S-allele was described in 9 varieties. Simultaneously, the presence of the Vf gene was screened in the collection of 21 Czech apple varieties. Ten varieties with a field resistance against the scab had a heterozygous constitution of the Vf gene. All 11 susceptible varieties were recessive homozygous vfvf.

New EU Member States: booming agro-food trade, Poland ahead - Scientific Information

Z. Lukas

Agric. Econ. - Czech, 2005, 51(4):175-180 | DOI: 10.17221/5091-AGRICECON

Some aspects of land market in Central and Eastern European countries: focus on Slovakia

P. Bielik, E. Horská, N. Turčeková

Agric. Econ. - Czech, 2005, 51(8):335-341 | DOI: 10.17221/5116-AGRICECON

The presented research was done in two different regions in Slovakia, characterized by different soil and natural conditions and also production and economic results. The micro-economic analysis was aiming not only at private farmers but also at other legal entities using land for production of agricultural products. The first monitored group consisted of 412 private farmers, farming in average 43.2 ha of agricultural land. The second group consisted of 150 businesses, having 1 866 ha of agricultural land in average. The paper also shows different problems of restructuring land markets in some countries of Central and Eastern Europe.

Soil forming role of birch in the Ore Mts.Original Paper

I. Ulbrichová, V. V. Podrázský, M. Slodičák

J. For. Sci., 2005, 51(20):54-58 | DOI: 10.17221/11850-JFS

Large areas were deforested as a consequence of the immission calamity in the Czech Republic in the last decades. As a part of restoration activities, preparatory species were utilized, both planted and sown, to cover forest soils, to prevent soil erosion and to regenerate forest microclimate, necessary for reintroduction of target, climax species. Birch (especially Betula pendula Roth.) was among the mostly common preparatory species. Presented paper documents the effects of birch in the case of its cultivation on an intact soil. In this case, birch was documented as a species suitable in a short-time perspective, improving soil characteristics and forming effective shelter against increased humus mineralization.

Application of ionising radiation for the stabilisation of Trichoderma viride cellulases

Vít Plaček, Karel Vacek, Jan Káš, Kateřina Demnerová, Jarmila Zídková, Jiří Sajdok

Czech J. Food Sci., 2005, 23(3):111-115 | DOI: 10.17221/3379-CJFS

The solutions of cellulolytic enzymes designated as standards for the cellulase activity assay were exposed in sealed glass ampoules (containing at least 100 Cx-units per ml in 30% w/w glycerol) to gamma radiation within the dose interval of 0-18 kGy. Glycerol was found to be the best enzyme stabiliser, however, the dose for the decontamination had to be increased in comparison with the original solution because glycerol protected also the contaminating microflora. The preparation after such treatment (30% of glycerol, dose 7 kGy) retained about 95% of the initial enzymatic activity without any decrease taking place in the following 6 months. The loss of the side activities did not exceed 10.5% and no bacterial contamination was detected either after 6 months of storage following the irradiation. No difference was found in the immunoreactivity of cellulases or in protein chromatografic (FPLC) pattern between the original and the irradiated enzyme preparations.

Current knowledge on koi herpesvirus (KHV) - a review

D. Pokorova, T. Vesely, V. Piackova, S. Reschova, J. Hulova

Vet Med - Czech, 2005, 50(4):139-148 | DOI: 10.17221/5607-VETMED

The first outbreaks of a disease connected with high mortality of common carp and koi carp caused by koi herpesvirus (KHV) were reported in 1998 in Israel and in the United States. Since then, several cases have been confirmed all over the world. At present, this viral disease is considered to be one of the most risky factors affecting populations of common carp and koi carp. Affected fish become disoriented and swim erratically with high breathing frequency, swollen gills and partially local skin lesions. The virus was isolated from the tissues of fish showing signs of the disease and subsequently cultured on koi fin (KF-1) cells. Electron microscopic examinations revealed morphological signs identical with viruses of the family Herpesviridae. Analysis of virion polypeptides and gene DNA showed the differences between KHV and the well-known herpesvirus of cyprinids, Herpesvirus cyprini (CHV), and Channel catfish virus (CCV). Water temperature is a factor influencing the onset and severity of disease. Fish seem most susceptible at water temperatures of 18-28°C, no morbidities occur at 13°C and 30°C. At present, diagnosis of KHV is mainly based on detection of viral DNA by PCR method.

Species level identification of thermotolerant campylobacters

I. Kolackova, R. Karpiskova

Vet Med - Czech, 2005, 50(12):543-547 | DOI: 10.17221/5663-VETMED

The aim of this study was to compare the phenotypic and genotypic based methods for species identification of thermotolerant campylobacters of human and food origin from the Czech Republic. Phenotypic methods are time-consuming and sometimes lead to intermediate results, therefore replacement by more specific and rapid methods are needed. Out of a total of 911 campylobacter strains tested, 800 human isolates were received from the clinical bacteriology laboratories from 5 regions and 111 foodstuff isolates (raw chicken and pork meat from retail market) originated from the routine examination in our laboratory. Based on the PCR method 85.1% of these strains were identified as C. jejuni, 12.5% as C. coli and 2.3% as mixed cultures of C. jejuni and C. coli. When species determination of campylobacters was based on conventional methods (hippurate hydrolysis test), 28.5% of the isolates were not identified correctly. The mixed cultures of campylobacters have not been detected without further subculturing of strains, which takes several days and enormously extends the identification process. The use of the PCR method showed to be a useful tool for species identification of Campylobacter spp.

Reaction of selected winter wheat varieties to autumnal infection with Wheat dwarf virus

Lenka Širlová, Josef Vacke, Michala Chaloupková

Plant Protect. Sci., 2005, 41(1):1-7 | DOI: 10.17221/2732-PPS

The response of 25 registered winter wheat varieties to autumnal infection with Wheat dwarf virus (WDV) was studied in small plot trials in two years. The materials were infected by vectors, leafhopper Psammotettix alienus Dahlbom, 1851 from three-leaf stage to tillering. The symptoms expression was monitored in spring and plant height, weight of above ground biomass and grain yield were observed in summer. All tested varieties were evaluated as susceptible and divided into three groups: varieties Banquet and Svitava with 87.3-93.1% grain yield reduction as moderately susceptible, varieties Clever, Drifter, Niagara and Rialto with 95.6-97.68% grain yield reduction as susceptible and varieties Apache, Batis, Bill, Complet, Contra, Corsaire, Ludwig, Mladka, Nela, Record, Rheia, Semper, Sepstra, Solara, Sulamit, Tower, Trend, Vlasta and Winsdor with 99.7-100% grain yield reduction as very susceptible. Statistically significant differences were observed between moderately susceptible and susceptible varieties as well as very susceptible ones in absorbency values by means of DAS-ELISA.

Induced spawning in bream (Abramis brama L.) using pellets containing GnRH

D. Kucharczyk, R. Kujawa, A. Mamcarz, K. Targońska-Dietrich, E. Wyszomirska, J. Glogowski, I. Babiak, T. Szabó

Czech J. Anim. Sci., 2005, 50(3):89-95 | DOI: 10.17221/4000-CJAS

Wild spawners of common bream, Abramis brama, were caught in the Kortowskie Lake (north Poland) and transported to a hatchery for artificial spawning. Fish were hormonally induced using GnRH analogue combined with metoclopramide (ovopel). The results of bream reproduction in captivity were compared with fish treated with the combination of hCG and CPE and with control group injected saline. Males from treated groups produced significantly more milt (over 4.3 ml/kg vs. 2.1) of better qualities: spermatozoon concentration (over 9.3 × 109 vs. 6.8) and motility (over 85% vs. 62). Females from the control group did not spawn whereas those from hormonally induced groups ovulated: 62% after CPE treatment and 100% after GnRHa treatment. Generally, the fish after ovopel stimulation showed the best hatchery parameters.

Enterococci from rabbits - potential feed additive

M. Simonová, A. Lauková, I. Štyriak

Czech J. Anim. Sci., 2005, 50(9):416-421 | DOI: 10.17221/4221-CJAS

Enterococci (58) from faeces of rabbits of various age (from 2 months to 3 years) and 5 different rabbit farms were isolated and tested for survival in the presence of oxgall, lactic acid production, urease activity, resistance to low pH as well as their binding ability was tested. Fifty percent of enterococcal isolates were identified as Enterococcus faecium, 19% as E. faecalis. All strains showed good survival in the presence of 5% oxgall. The urease activity of isolates was in the range from 0.013 to 17.13 nkat/ml, only E. faecalis EE229 strain did not produce any urease. The survival of strains was tested at pH 3.0 and the percentage of their survival ranged between 62.0% and 90.0%. E. faecium EF1819 strain was found to show the best survival ability at low pH. Particle agglutination assay values of selected enterococci expressed only negative (0) or weakly positive (1) binding of heparin, bovine fibrinogen, porcine fibronectin and lactoferrin. Based on the results, most of the selected enterococci could be promising probiotic feed additives.

New possibilities of identifying social capital for its use in sustainable rural development

M. Lošťák

Agric. Econ. - Czech, 2005, 51(2):57-63 | DOI: 10.17221/5077-AGRICECON

In relation to sustainable rural development, the paper starts with the question of its conditions. One of them is social acceptance of various projects or programmes. This issue is joined with the co-ordination of human activities. The mechanism facilitating the co-ordination in contemporary societies is related to social capital. Its concept is outlined through the references to the basic literature about the topic. Using content analysis, based on the quantification of the categories created through the analysis of the literature about the topic, the social capital in selected municipalities is investigated. The main aim of the paper, however, is to show the role of this method in social capital fast identification. Although the approach necessitates further elaboration, it can be considered as the first important step in the practice of development activities. The background of the paper reflects the challenges of the World Bank concerning the elaboration and development of the new methods of measuring social capital.

Czech LETS (empirical study on local complementary currencies in the Czech Republic)

L. Zagata

Agric. Econ. - Czech, 2005, 51(6):271-278 | DOI: 10.17221/5107-AGRICECON

The presented theoretical reflection of the institutionalization of money shows that the given features of money are always linked to certain social conditions. Nowadays there are visible several attempts to establish local currencies, which would work as a complement of national currencies and which be able to fulfill other functions than the purely economic ones. The circulation of the "own" currency brings all kinds of benefits to community members. The goal of this work is to elucidate in empirical perspective mechanism of the local currency systems operating in the Czech Republic. Results of the research show a peculiar form of the LETS, which tend to divert from the rather formalized trading systems known in the Western Europe.

Importance of the integrated purchasing for food businesses

O. Tvrdoň, R. Presová

Agric. Econ. - Czech, 2005, 51(11):521-529 | DOI: 10.17221/5147-AGRICECON

The paper describes the importance of integrated purchasing for agrarian businesses and for retail chains, i.e. on two opposite sides of the different economic and negotiating power. It points out the trends of the modern purchasing, economic benefits of long-term business relations, and the importance of objectively settled terms of payment for the purchased products. The paper emphasizes the specifics of sales cooperatives of farmers as a modern element of sales and purchasing activities of the agricultural primary production.

Real potentials of social forest functions of selected forest stands at Židlochovice Forest Enterprise

P. Kupec

J. For. Sci., 2004, 50(4):190-198 | DOI: 10.17221/4614-JFS

Social functions of forests were evaluated at Židlochovice Forest Enterprise by applying the method of Vyskot et al. (1996-2002). Real potentials of social forest functions were determined for all stand groups included in a forest management plan (FMP). The results of evaluation were processed in a database and projected in GIS. Tables and charts were used for the evaluation of results. We can claim on the basis of the results that the forest stands of the examined area are characterized by a very high potential to fulfil a bio-production social function. On the contrary, they have a low potential to fulfil social functions of ecological stabilization and edaphic soil conservation and hydric-hydrological function. The results of evaluation of the real potentials of social forest functions at Židlochovice Forest Enterprise are represented by the forest stands of management group No. 19 of forest management plan area Židlochovice.

Distribution and attack behaviour of the red turpentine beetle, Dendroctonus valens, recently introduced to China

B. Gao, X. Wen, H. Guan, M. Knížek, J. Žďárek

J. For. Sci., 2005, 51(4):155-160 | DOI: 10.17221/4554-JFS

The red turpentine beetle, Dendroctonus valens LeConte (Coleoptera: Scolytidae), was found for the first time in China in Yangcheng and Xinshui counties, Shanxi province in 1998, and in Hebei province in 1999. The beetle mostly attacks the oil pine Pinus tabulaeformis Carriére. By 2003 the beetle was found in 85 counties of three provinces in north China and the area of infested pine forests covered more than 700,000 ha. The elevation above sea level of forests infested is more than 800 m. The beetles most frequently attack trees on hilltops and at the forest edge, fewer attacks occur in the centre of the stand. This correlates with the damage done to the trees by wind or man. Weak and dying trees are more vulnerable to attack than healthy ones. The most attractive breeding sites are fresh stumps. The population density of the beetles is higher in the forests on northern slopes than on southern slopes. Most of the bores in the trunk are less than 0.5 m above ground; the galleries are found also on roots.

Can artificial wounding of beech stems induce necroses?

A. Cicák, I. Mihál

J. For. Sci., 2005, 51(12):559-563 | DOI: 10.17221/4588-JFS

The paper presents data on the induction of necroses after small injuries to beech stems caused by electrodes during measuring cambium electric resistance. Altogether 121 beech stems of tree class 1-3 (according to Kraft) were evaluated. Among 2,904 mechanical injuries in 121 stems evaluated (24 per stem), 155 injuries induced necroses, hence each 19th injury induced necrosis. Most stems (33.06%) showed one necrosis, few stems (4.96%) showed even four necroses. 28.93% of stems did not show any necrosis. In order to prevent the infection of wounds and subsequent induction of necroses the authors recommend to treat any wounds with a suitable fungicide after using an equipment causing even negligible wounds of stems.

Detection of bovine and human tuberculosis in cattle and other animals in six Central European countries during the years 2000-2004

I. Pavlik, I. Trcka, I. Parmova, J. Svobodova, I. Melicharek, G. Nagy, Z. Cvetnic, M. Ocepek, M. Pate, M. Lipiec

Vet Med - Czech, 2005, 50(7):291-299 | DOI: 10.17221/5626-VETMED

During a five year period (2000-2004), the incidence of bovine and human tuberculosis in cattle and other animals from six Central European countries was evaluated: Croatia (HRV), the Czech Republic (CZE), Hungary (HUN), Poland (POL), Slovakia (SVK), and Slovenia (SVN). These countries, lying between the Baltic and the Adriatic seas, cover an area of 610 402 km2 and had more than 68 million inhabitants and 9 330 264 cattle in 2003. Successful national control programmes against bovine tuberculosis in cattle were carried out up until 1980: HRV (1953-1966), CZE (1959-1968), HUN (1962-1980), POL (1959-1975) SVK (1959-1968), and SVN (1962-1973). During the entire monitored period skin testing with bovine tuberculin in all cattle older than two years was carried out regularly either once a year or every second year. Five of these countries (CZE, HUN, POL, SVK, and SVN) joined the EC on May 1st, 2004. CZE and SVK were officially declared free of bovine tuberculosis in cattle on March 31st, 2004 (Commission Decision No. 2004/320/EC) and March 4th, 2005 (Commission Decision No. 2005/179/EC), respectively. Bovine tuberculosis was diagnosed in a total of 188 cattle herds in the study area: 145 (77.1%) outbreaks in small herds (< 10 cows) and 43 (22.9%) outbreaks in large herds (≥ 10 cows). The last cases of bovine tuberculosis in cattle in SVK and in the CZE were diagnosed in 1993 and 1995, respectively. During the monitored period, bovine tuberculosis was diagnosed in animal species other than cattle found in zoological gardens: in two Bactrian camels (Camelus ferus) in the CZK, in one Siberian tiger (Panthera tigris f. altaica) in HUN, in one bison (Bison bison) and one eland (Taurotragus oryx) in POL, and in one dromedary camel (Camelus dromedarius) and two bison in SVN. In wild animals, bovine tuberculosis was diagnosed in wild boar (Sus scrofa) in HUN (n = 14) and HRV (n = 1), in six red deer (Cervus elaphus) in HUN, in 14 European bison (Bison bonasus f. bonasus) and two roe deer (Capreolus capreolus f. capreolus) in POL. Infections caused by Mycobacterium tuberculosis were also diagnosed in four cattle and two pigs in POL, in one cattle in SVN, in one dog (Canis lupus f. familiaris) in the CZE and in one dog in HUN. M. africanum was diagnosed in one hyrax (Procaria habessinica) in a zoological garden in HRV.

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