Bonding of wood

The paper presents the results of strength tests of joints made using six different adhesives destined by their producers for bonding wood. Bonded samples were made from seven sorts of wood commonly growing in the Czech Republic, namely ash, beach, cherry, maple, pine, spruce and walnut. From semi-products (boards, planks, squared timber logs) the test samples of dimensions 25 × 100 mm and 4 mm thickness were cut out in the direction of year rings. Always two samples were bonded together so that their overlap was of 12.5 mm. All these assemblies were loaded using the universal testing machine up to their rupture. The rupture force and the rupture type (rupture in the joint, in the bonded material) were registered. The aim of the tests was to assess the influence of the used adhesive on the bonded joint strength at different woods, to assess the variability of the adhesive consumption at the manual adhesive application by different workers and to determine costs for bonding of different woods using different adhesives. From the results it follows that between six tested adhesives used for bonding of seven sorts of wood, considerable differences exist not only as regards their price, but also their quality. From the results it also follows that the manual adhesive application is very unequal, because it depends on the dexterity and care of the worker. Next, the costs for bonding of different woods using different adhesives were determined.

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EFFECT OF STORAGE DURATION ON MECHANICAL PROPERTIES OF BELLO EGGPLANT FRUIT UNDER QUASI COMPRESSION LOADING

International Journal of Research -GRANTHAALAYAH ◽

10.29121/granthaalayah.v7.i5.2019.850 ◽

2019 ◽

Vol 7 (5) ◽

pp. 311-320

Author(s):

Umurhurhu Benjamin ◽

Uguru Hilary

Keyword(s):

Mechanical Properties ◽

Strong Dependence ◽

Testing Machine ◽

Storage Period ◽

Maturity Stage ◽

Rupture Force ◽

Storage Duration ◽

Compression Loading ◽

Universal Testing ◽

Rupture Energy

The mechanical properties of eggplant fruit (cv. Bello) harvested at physiological maturity stage were evaluated in three storage periods (3d, 6d and 9d). These mechanical parameters (rupture force, rupture energy and deformation at rupture point) were measured under quasi compression loading, using the Universal Testing Machine (Testometric model). The fruit’s toughness and rupture power were calculated from the data obtained from the rupture energy and deformation at rupture point. Results obtained showed that mechanical properties of the Bello eggplant fruit exhibited strong dependence on the storage period. The results showed that as the Bello fruit stored longer, its rupture force and rupture energy decreased from 812 N to 411 N, and 5.58 Nm to 3.11 Nm respectively. While the rupture power decreased from 1.095 W to 0.353 W. On the contrary, the toughness and deformation at rupture increased from 0.270 mJ/mm3 to 0.403 mJ/mm3, and 16.99 mm to 25.22mm respectively during the 9 days storage period. The knowledge of the mechanical properties of fruits is important for their harvest and post-harvest operations, therefore, information obtained from this study will be useful in the design and development of machines for the mechanization of eggplant production.

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Bonding of plywood

Research in Agricultural Engineering ◽

10.17221/39/2015-rae ◽

2016 ◽

Vol 62 (No. 4) ◽

pp. 198-204

Author(s):

M. Brožek

Keyword(s):

Tensile Strength ◽

Testing Machine ◽

Strength Testing ◽

Bonded Joints ◽

Rupture Force ◽

Oblique Direction ◽

Direction Angle ◽

Economical Evaluation ◽

Wood Bonding ◽

Strength Tests

The contribution contains results of bonded joints strength tests. The tests were carried out according to the modified standard ČSN EN 1465 (66 8510):2009. The spruce three-ply wood of 4 mm thickness was used for bonding according to ČSN EN 636 (49 2419):2013. The test samples of 100 × 25 mm size were cut out from a semi-product of 2,440 × 1,220 mm size in the direction of its longer side (angle 0°), in the oblique direction (angle 45°) and in the direction of its shorter side (crosswise – angle 90°). The bonding was carried out using eight different domestic as well as foreign adhesives according to the technology prescribed by the producer. All used adhesives were designated for wood bonding. At the bonding the consumption of the adhesive was determined. After curing, the bonded assemblies were loaded using a universal tensile-strength testing machine up to the rupture. The rupture force and the rupture type were registered. Finally, the technical-economical evaluation of the experiments was carried out.

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Presence of Arcobacter species in pet cats and dogs in the Czech Republic

Veterinární Medicína ◽

10.17221/273/2015-vetmed ◽

2017 ◽

Vol 61 (No. 8) ◽

pp. 449-455

Author(s):

M. Pejchalova ◽

S. Zabcikova ◽

L. Silhova ◽

D. Silha ◽

I. Brozkova ◽

...

Keyword(s):

Czech Republic ◽

Gel Electrophoresis ◽

Dna Isolation ◽

Human Infection ◽

Chain Reaction ◽

The Czech Republic ◽

Two Samples ◽

Arcobacter Butzleri ◽

Polymerase Chain

This study was conducted to evaluate the occurrence of the genus Arcobacter in cats and dogs in the Czech Republic. These animals may be carriers of the bacteria and potential sources of human infection. Oral smears were collected from animals using smear swabs and brushes. Based on previous studies, commercially available DNA kits were used for DNA isolation. Samples were analysed using polymerase chain reaction (PCR) and evaluated using gel electrophoresis. Overall, 178 oral smears were tested, of which 108 were from dogs and 70 were from cats. Out of all smears, five were positive, of which four samples were from dogs and one from a cat. In all five positive cases, PCR confirmed the presence of Arcobacter butzleri. In follow-up sampling, the presence of Arcobacter butzleri was demonstrated in two samples from a dog.

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PCR detection of Bartonella spp. in the dog

Acta Veterinaria Brno ◽

10.2754/avb201483020079 ◽

2014 ◽

Vol 83 (2) ◽

pp. 79-82 ◽

Cited By ~ 2

Author(s):

Jarmila Konvalinová ◽

Vlasta Svobodová ◽

Dobromila Molinková ◽

Miroslav Svoboda

Keyword(s):

Polymerase Chain Reaction ◽

Czech Republic ◽

Clinical Symptoms ◽

Bartonella Henselae ◽

Chain Reaction ◽

The Czech Republic ◽

Two Samples ◽

Healthy Dogs ◽

Polymerase Chain ◽

First Time

Our study aimed at using PCR to identify the incidence ofBartonellaspp. in blood of dogs. Altogether 286 dogs of 92 breeds aged 3 month to 17 years were tested from October 2008 to December 2009. Healthy dogs as well as dogs with various clinical symptoms of disease were included in the group. Samples were tested by polymerase chain reaction (PCR) specific for the presence ofBartonellaspp. Following the DNA examination in 286 dogs by PCR and subsequent sequencing, two samples were identified asBartonella henselae(0.7%). Other species ofBartonellawere not found. It was the first time in the Czech Republic when incidence ofBartonellaspp. was determined in dogs.

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Store personality and behavioral intentions of customers: a comparative study of retail industry in the Czech Republic and Sri Lanka

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis ◽

10.11118/actaun201260070477 ◽

2012 ◽

Vol 60 (7) ◽

pp. 477-484 ◽

Cited By ~ 1

Author(s):

W. M. C. Bandara Wanninayake

Keyword(s):

Czech Republic ◽

Sri Lanka ◽

Behavioral Intentions ◽

Brand Personality ◽

The Czech Republic ◽

Cultural Contexts ◽

Loyal Customer ◽

Two Samples ◽

Branding Strategies ◽

The Impact

Brand personality is recognized as a key platform for developing a loyal customer base for service organizations. When it comes to the modern retail sector, self-service supermarkets are highly concerned about branding strategies for attracting customers to their stores. However, the impacts of brand personality of supermarkets can vary in different cross-cultural contexts. Hence, in this study, researchers examined this issue by selecting two samples: from Sri Lanka and from the Czech Republic, with the purpose of comparing the impact of brand personality on customer behavioral intentions in two different cultural contexts. For the first sample, 150 regular shoppers were randomly selected in Colombo (Sri Lanka), and data was collected from a researcher administrated questionnaire. The second sample was drawn from Zlin, (the Czech Republic) where data was collected from 120 customers via using a self-administrated questionnaire. Principle component analysis and multiple regressions were used for data analysis and for testing hypotheses. This paper concludes by explaining the implications for modern retailers in designing their branding strategies, and by comparing which aspects of brand personalities of supermarkets are important in two different contexts.

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Prediction of Joint Strength and Effect of the Surface Treatment on the Single Overlap Adhesive Joints

U Porto Journal of Engineering ◽

10.24840/2183-6493_003.003_0001 ◽

2018 ◽

Vol 3 (3) ◽

pp. 1-16

Author(s):

Filipe A. G. Giesteira ◽

E. A. S. Marques ◽

R. J. C. Carbas ◽

L. F. M. da Silva

Keyword(s):

Surface Treatment ◽

Joint Strength ◽

Failure Load ◽

Testing Machine ◽

Adhesive Joints ◽

The Other ◽

Material Surface ◽

Joint Configuration ◽

Universal Testing ◽

Two Component

A two-component high-ductility adhesive (acrylic and catalyst based), SikaFast® - 5211 NT, was used to bond single overlap joints with mild steel adherends and 25 mm of overlap. One joint configuration used treated bonding surfaces while the other was did not employ treatment of the adherend surfaces, with the aim of studying the influence of the material surface treatment. The specimens were tensile tested in a INSTRON® universal testing machine and the non-treated surface have shown a strength four times lower than the treated surface. Several analytical methods were used to predict joint strength, with two methods achieving reasonably accurate failure load predictions.

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Effect of Changing the Parameters of the Multi Jet Fusion (MJF) Process on the Spatial Objects Produced

Problems of Mechatronics Armament Aviation Safety Engineering ◽

10.5604/01.3001.0014.5644 ◽

2020 ◽

Vol 11 (4) ◽

pp. 61-72

Author(s):

Maciej CADER ◽

Wojciech KIŃSKI

Keyword(s):

Tensile Test ◽

Measurement System ◽

High Speed ◽

Testing Machine ◽

Spatial Objects ◽

Universal Testing Machine ◽

Universal Testing ◽

Static Tensile Test ◽

Strength Tests ◽

Static Tensile

This paper describes the principle of operation of Multi Jet Fusion (MFJ) technology in detail. Hybrid strength tests were carried out using an INSTRON 5967 universal testing machine controlled by the Bluehill 3 program and coupled with the ARAMIS measurement system (GOM, Gmbh), enabling the monitoring of deformations in three axes, using a system of high-speed cameras. The results are given of the static tensile test of samples in two printing modes characteristic of the MJF technology – FAST and BALANCE.

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NINE YEAR CHANGES IN PREVALENCE OF COGNITIVE IMPAIRMENT IN THE CZECH REPUBLIC

Innovation in Aging ◽

10.1093/geroni/igz038.3178 ◽

2019 ◽

Vol 3 (Supplement_1) ◽

pp. S865-S866

Author(s):

Dominika Seblova ◽

Marie Kuklova ◽

Miloslav Kopecek ◽

Pavla Cermakova ◽

Carol Brayne ◽

...

Keyword(s):

Cognitive Impairment ◽

Czech Republic ◽

North America ◽

Eastern Europe ◽

Western Europe ◽

Central And Eastern Europe ◽

Blood Cholesterol ◽

Sensitivity Analyses ◽

The Czech Republic ◽

Two Samples

Abstract Studies from North America and Western Europe suggest stable or declining trends in impaired cognition. Nevertheless, data on changes in cognitive health from Central and Eastern Europe are largely lacking. Therefore, we aimed to examine changes in the age-specific prevalence of cognitive impairment in the Czech Republic, a country in Central Europe. To this aim we used two samples from the population-based Czech Survey on Health, Ageing and Retirement in Europe (SHARE). Age-specific prevalence of cognitive impairment (defined based on scores in verbal fluency, immediate recall, delayed recall and temporal orientation) was compared between participants in wave 2 (2006/2007; n=1,107) and wave 6 (2015; n=3,104). Logistic regression was used to estimate the association between wave and cognitive impairment, step-wise adjusting for sociodemographic and clinical characteristics. Multiple sensitivity analyses, focusing on alternative operationalisations of relative cognitive impairment, impact of missing cognitive data and survival bias, were carried out. The most conservative estimate suggested that the age-specific prevalence of cognitive impairment declined by one fifth, from 11% in 2006/2007 to 9% in 2015. Decline was observed in all sensitivity analyses. Multivariate decomposition for nonlinear models was used to examine which predictors explain the change in prevalence. Reduction in physical inactivity, control of high blood cholesterol and increases in length of education were the main predictors contributing to decline in cognitive impairment. In conclusion, our findings are in line with those found in North America and Western Europe even though countries in Central and Eastern Europe, including Czech Republic, have poorer risk profiles.

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