Research Institute of Agricultural Engineering

Prague, Czech Republic

Research Institute of Agricultural Engineering

Prague, Czech Republic
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Pecen J.,Czech University of Life Sciences | Zabloudilova P.,Research Institute of Agricultural Engineering
NANOCON 2016 - Conference Proceedings, 8th International Conference on Nanomaterials - Research and Application | Year: 2016

The paper deals with a change in the luminous radiation reflected by surfaces with coats with photocatalytic active particles. In the executed laboratory experiments, we used two commercially available coats with photocatalysts on the basis of TiO2 and one coat without photocatalytic active particles. As the luminous radiation source, we used two different light sources with different spectre. The used light sources provided same radiation intensity at the place of measuring of the reflection from the surface of the sample. In individual phases of the experiments, we repeatedly measured the values of impacting and reflected radiation depending on the type of the coat, its moisture and the used luminous radiation source. The coats were applied to the area of 10×10 cm according to the recommendation of the manufacturer. The weight of the coat on thus prepared samples was ascertained by weighing the sample after it dries out. With regard to the elimination of various inhomogeneities in the coat layer on the sample surface, each sample was repeatedly measured both for impacting and reflected radiation (always after having been turned by 90°). The relation between the moisture of the coat and the reflected light radiation was non-linear and the value of reflected radiation decreased with increasing moisture of the coat layer. With increasing moisture of the coat, we also observed shift in the spectre of reflected radiation towards longer wavelengths.


Borovec R.,Research Institute of Agricultural Engineering | Skuhrovec J.,Czech Republic Crop Research Institute
Acta Entomologica Musei Nationalis Pragae | Year: 2015

The subgenus Neosciaphobus Apfelbeck, 1922 of the genus Sciaphobus K. Daniel, 1904 (Coleoptera: Curculionidae: Entiminae: Sciaphilini) is discussed, revised, redefi ned, redescribed and keyed. All included species are redescribed and illustrated. A review of the species of the subgenus Sciaphobus s. str. without long elytral erect setae is given. Sciaphobus (Neosciaphobus) angustus sp. nov. from Albania, S. (Sciaphobus) formaneki sp. nov., and S. (Sciaphobus) pelikani sp. nov. from Montenegro are described and compared with similar species. Four new synonyms are proposed: Sciaphobus curvimanus Apfelbeck, 1922 = S. muelleri Penecke, 1928, syn. nov.; S. squalidus (Gyllenhal, 1834) = Sciaphobus balcanicus Apfelbeck, 1922, syn. nov. = Sciaphobus squalidus alternans Apfelbeck, 1922, syn. nov. = Sciaphobus squalidus ovalipennis Apfelbeck, 1922 syn. nov. A neotype for Sciaphilus subnudus Desbrochers des Loges, 1892 is designated; lectotypes for the following species are designated: Eusomus setosulus Germar, 1824, Polydrusus squalidus Gyllenhal, 1834, Polydrusus vittatus Gyllenhal, 1834, Sciaphilus beckeri Stierlin, 1863, Sciaphobus balcanicus Apfelbeck, 1922, Sciaphobus scheibeli Apfelbeck, 1922, Sciaphilus smaragdinus Boheman, 1840, and Thylacites ningnidus Germar, 1824 Sciaphobus rasus (Seidlitz, 1867) is tranferred from the subgenus Neosciaphobus to the nominotypical subgenus. All the examined types of both subgenera are commented on. Female genitalia of the genus are studied and illustrated for the first time. The following new country records are presented: Sciaphobus ningnidus from Croatia and Montenegro, S. reitteri from Croatia, and S. squalidus from Moldova and Greece. © 2015, National Museum/Narodni muzeum. All rights reserved.


Maresova K.,Research Institute of Agricultural Engineering | Maresova K.,Charles University | Kollarova M.,Research Institute of Agricultural Engineering
Waste Management | Year: 2010

The temperature of matured compost is an indicator of feedstock quality and also a good feedback informing about the suitability of an applied technological procedure. Two independent experiments using the technology of windrow composting at open area were conducted with the final goal to evaluate the effect of compost pile covering (in comparison with uncovered piles) on the course of composting process - behaviour of temperature over time and oxygen content. Two types of sheets were used - Top Tex permeable sheet and impermeable polyethylene sheet. The experiment I (summer months) aimed at comparison of efficiency between the Top Tex sheet cover and the uncovered compost piles, while experiment II (autumn months) compared treatments using the Top Tex sheet and polyethylene sheet by contrast. Within the experiment I the composts consisted of cattle slurry and fresh grass matter at a ratio of 1:1, in case of experiment II consisted of pig/cattle manure, fresh grass matter and chipped material at a ratio of about 1:2:1. The obtained data showed no significant differences among the cover treatments according to ANOVA. The only exception was oxygen content in pile 4 (experiment II) under Top Tex sheet, where a markedly higher oxygen content than under polyethylene sheet was measured during the whole composting period. It was the only case where statistical analysis proved a significant difference; the p-value was 0.0002. © 2010 .


Pecen J.,Czech University of Life Sciences | Zabloudilova P.,Research Institute of Agricultural Engineering
Engineering for Rural Development | Year: 2015

The objective of this paper was determination of the reflectance coefficient of selected materials that can be used as bedding in barns for farm animals (partially dehydrated digestate from BGS and the same partially dehydrated digestate with the addition of calcium hydroxide (hydrated lime in the form of powder) in the amounts 0.25, 0.125 and 0.0625 kg per 1 kg of partially dehydrated digestate) depending on the optical properties of the light sources used in barns (mainly in particular linear fluorescent lights) and dampness of these materials. We compare the spectra of impacting and reflected light including their energy. We ascertained that with the increasing dampness of the bedding material, a small but varying shift in wavelengths of the spectrum of the reflected light towards higher values occurred for all materials. At the same time, also the value of the colour temperature of the reflected light changed. The impacting and also reflected light and their spectra were measured by the radiometer with 0.5 nm resolution. Measuring was executed in the measuring device and repeated for each selected bedding material and each light source. All results were statistically processed by non-parametrical methods due to small sets of the measured data.


Cespiva M.,Research Institute of Agricultural Engineering | Zabloudilova P.,Research Institute of Agricultural Engineering
Engineering for Rural Development | Year: 2015

Livestock farming is one of the biggest sources of ammonia emissions, which are very dangerous for environment. There are many possibilities for ammonia emissions reducing. Using of biotechnological agents is one of the cheapest ways for ammonia emissions decreasing. This article describes the procedure and the results of emissions measurements in a pig house and in a poultry house, where one of enzymatic biotechnological agent was used. Ammonia emissions decreasing in both tests for more than 20 % was proved. Another benefit of the biotechnological agent was shown, too. The fattening period of broilers was reduced and the final weight of pigs was increased in comparison with the reference group without agent application. Better feeding conversions in both tests were proved.


Soucek J.,Research Institute of Agricultural Engineering
Research in Agricultural Engineering | Year: 2014

The research, whose results are presented, is aimed at determination of development of moulds number in wood chips under different storage temperatures. The experiments were carried out with the moisture of samples 65%, 22% and 1%. During the long-term storage the effect of water content in material on development of moulds can be recorded. The risks linked to mould occurrence can be considerably eliminated by reduction of water content.


Pexa M.,Czech University of Life Sciences | Kubin K.,Research Institute of Agricultural Engineering
Research in Agricultural Engineering | Year: 2012

This paper describes the effect of a mixture of rapeseed methyl ester and diesel oil on fuel consumption and power parameters of tractor engine. The hydraulic dynamometer was used to load the engine of Zetor Forterra 8641 tractor over rear power take-off. The measured tractor is almost new with less than 100 h worked. The measurements were realized for several ratios of diesel oil and rapeseed methyl ester (from pure diesel to pure rapeseed methyl ester). The engine was loaded by the dynamometer in several working points which were predefined by engine speed and its torque. The fuel consumption was measured by the flow meter in each of these points. The reduction of engine's power parameters and the increase of specific fuel consumption are expected due to the nature of rapeseed methyl ester such as e.g. lower calorific value.


Kotus M.,Slovak University of Agriculture | Pexa M.,Czech University of Life Sciences | Kubin K.,Research Institute of Agricultural Engineering
Journal of Central European Agriculture | Year: 2013

The paper describes the modeling of NRTC (Non-Road Transient Cycle) test procedure based on previously measured characteristics of fuel consumption, carbon monoxide (CO), carbon dioxide (CO2), hydrocarbons (HC), nitrogen oxides (NOx) and particulates (PM) production. It makes possible to compare the current technical condition of an internal combustion engine of an agricultural tractor with its previous state or other tractor's engine. Based on measured characteristics, it is also possible to model any other cycle without further measurements (NRSC test procedure, cycle for specific conditions - mountain tractor, etc.). The result may thus contribute to improving the environment by reducing the production of harmful substances emitted into the air and save money due to reduced fuel consumption.


Borovec R.,Research Institute of Agricultural Engineering | Perrin H.,CNRS Systematics, Biodiversity and Evolution Institute
Zootaxa | Year: 2016

Chiloneus globulus sp. nov. and C. tenietensis sp. nov. from Algeria are described, illustrated and compared with closely related species. The following new combinations are proposed: Chiloneus barbaricus (González, 1970) from Desbrochersella, Chiloneus innotatus (Pic, 1927) from Sciaphilus, Desbrochersella diversepubens (Pic, 1904) and Desbrochersella microps (Desbrochers des Loges, 1897) from Chiloneus, Myochlamys convexiceps (Desbrochers des Loges, 1896), Polydrusus (Leucodrusus) henoni (Allard, 1869) and Sericopholus murinus (Desbrochers des Loges, 1896) from Chiloneus. The following new synonymies are proposed: Chiloneus alboscutellaris (Pic, 1917) as a junior synonym of Chiloneus submaculatus (Pic, 1917), Chiloneus curtipennis (Pic, 1917) as a junior synonym of Desbrochersella diversepubens (Pic, 1904), Chiloneus dividuus (Pic, 1904) as a junior synonym of Chiloneus pennatus (Faust, 1885), Chiloneus inhumeralis (Pic, 1903) as a junior synonym of Chiloneus chobauti (Desbrochers des Loges, 1897), Chiloneus nasutus (Desbrochers des Loges, 1897) as a junior synonym of Chiloneus pertusicollis (Fairmaire, 1868), Chiloneus nitens (Pic, 1904) as a junior synonym of Chiloneus cinerascens (Rosenhauer, 1856), Chiloneus insulanus (González, 1970) as a junior synonym of Chiloneus innotatus (Pic, 1927), Chiloneus pilosulus Normand, 1953 as a junior synonym of Chiloneus vaulogeri (Pic, 1896), Chiloneus ruficornis (Allard, 1869) as a junior synonym of Chiloneus pertusicollis (Fairmaire, 1868), Chiloneus seminitidus (Hustache, 1941) as a junior synonym of Chiloneus cinerascens (Rosenhauer, 1856), Chiloneus subannulipes (Pic, 1917) as a junior synonym of Chiloneus minutissimus (Pic, 1904), Chiloneus subglobatus (Desbrochers des Loges, 1892) as a junior synonym of Chiloneus chevrolati Tournier, 1874, Chiloneus theresae (Pic, 1945) as a junior synonym of Chiloneus brevithorax Desbrochers des Loges, 1874, Chiloneus tuniseus (Desbrochers des Loges, 1897) as a junior synonym of Chiloneus brevipilis Desbrochers des Loges, 1893, Desbrochersella nitidipennis Pic, 1927 as a junior synonym of Chiloneus minutissimus (Pic, 1904), Pleurodirus alluaudi (Pic, 1903) as a junior synonym of Chiloneus vaulogeri (Pic, 1896), Sericopholus triangulifer (Desbrochers des Loges, 1903) as a junior synonym of Sericopholus murinus (Desbrochers des Loges, 1896). Lectotypes of the following species are designated (current names added in brackets when different): Alophinus triangulifer Desbrochers des Loges, 1903 (currently Sericopholus murinus (Desbrochers des Loges, 1896)), Alophinus triangulifer v. subuniformis Pic, 1904 (currently Sericopholus murinus (Desbrochers des Loges, 1896)), Chiloneus algericus Desbrochers des Loges, 1871 (currently Chiloneus infuscatus (Chevrolat, 1861)), Chiloneus brevipilis Desbrochers des Loges, 1893, Chiloneus carinidorsum Desbrochers des Loges, 1871, Chiloneus chevrolati Tournier, 1874, Chiloneus murinus Desbrochers des Loges, 1896 (currently Sericopholus murinus (Desbrochers des Loges, 1896)), Chiloneus ottomanus Desbrochers des Loges, 1892, Chiloneus veneriatus Normand, 1937, Eusomus sphaeropterus Allard, 1869 (currently Chiloneus pertusicollis (Fairmaire, 1868)), Foucartia ruficornis Allard, 1869 (currently Chiloneus pertusicollis (Fairmaire, 1868)), Holcorhinus parvus Stierlin, 1899 (currently Chiloneus chevrolati Tournier, 1874), Platytarsus vaulogeri Desbrochers des Loges, 1897 (currently Chiloneus barbaricus (González, 1970)), Sciaphilus alboscutellaris Pic, 1917 (currently Chiloneus submaculatus (Pic, 1917)), Sciaphilus alluaudi Pic, 1903 (currently Chiloneus vaulogeri (Pic, 1896)), Sciaphilus chobauti Desbrochers des Loges, 1897 (currently Chiloneus chobauti (Desbrochers des Loges, 1897)), Sciaphilus convexiceps Desbrochers des Loges, 1896 (currently Myochlamys convexiceps (Desbrochers des Loges, 1896)), Sciaphilus curtipennis Pic, 1917 (currently Desbrochersella diversepubens (Pic, 1904)), Sciaphilus diversepubens Pic, 1904 (currently Desbrochersella diversepubens (Pic, 1904)), Sciaphilus dividuus Pic, 1904 (currently Chiloneus pennatus (Faust, 1885)), Sciaphilus inhumeralis Pic, 1903 (currently Chiloneus chobauti (Desbrochers des Loges, 1897)), Sciaphilus innotatus Pic, 1927 (currently Chiloneus innotatus (Pic, 1927)), Sciaphilus microps Desbrochers des Loges, 1897 (currently Desbrochersella microps (Desbrochers des Loges, 1897)), Sciaphilus minutissimus Pic, 1904 (currently Chiloneus minutissimus (Pic, 1904)), Sciaphilus nasutus Desbrochers des Loges, 1897 (currently Chiloneus pertusicollis (Fairmaire, 1868)), Sciaphilus nitens Pic, 1904 (currently Chiloneus cinerascens (Rosenhauer, 1856)), Sciaphilus pertusicollis Fairmaire, 1868 (currently Chiloneus pertusicollis (Fairmaire, 1868)), Sciaphilus pruinosus Desbrochers des Loges, 1896 (currently Chiloneus pennatus (Faust, 1885)), Sciaphilus subannulipes Pic, 1917 (currently Chiloneus minutissimus (Pic, 1904)), Sciaphilus submaculatus Pic, 1917 (currently Chiloneus submaculatus (Pic, 1917)), Sciaphilus vaulogeri Pic, 1896 (currently Chiloneus vaulogeri (Pic, 1896)). © Copyright 2016 Magnolia Press.


Hanc A.,Czech University of Life Sciences | Pliva P.,Research Institute of Agricultural Engineering
Journal of Material Cycles and Waste Management | Year: 2013

This study was implemented to investigate the effect of using pre-composted and raw kitchen waste with the addition of woodchips and paper in vermicomposting with regard to temperature, loss of weight, fluctuation of total and available content of nutrients and viability of earthworms. Kitchen bio-waste must be pre-composted for more than 2 weeks to reach a temperature below 25 °C. Vermicomposting increased the total content of N, P, K, Ca and Mg and the availability of P and K. Addition of used paper into kitchen bio-waste proved to be a suitable feed for earthworms. On the basis of the obtained data, a new type of vermireactor for separated pre-composting and subsequent vermicomposting of food waste has been developed. © 2013 Springer Japan.

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