Wyniki wyszukiwania - Biblioteka Nauki

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Analiza krytyczna nazwy i treści „arbitrage pricing theory" - czas zmiany paradygmatu?

100%

Kral M. , Rówińska M.

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

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2015

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tom z. 83

355--366

PL

Niniejszy artykuł jest poświęcony analizie problematyki dwóch kategorii ekonomicznych, tj. klasycznego arbitrażu finansowego i zasady Carry trade. Z klasycznym arbitrażem finansowym ściśle wiąże się Arbitrage Pricing Theory (dalej APT), używana na podstawie artykułu S. Rossa. Autorzy niniejszego artykułu w swoim krytycznym podejściu do APT zwracają uwagę na definicję arbitrażu cenowego (w jego formach klasycznej i czasowej). Z przeprowadzonej krytycznej analizy etymologicznej wynika, że w rzeczywistości założenia teorii ATP S. Rossa nie odpowiadają klasycznej definicji arbitrażu finansowego.

EN

This article is dedicated to critical analysis of two economic categories: classic financial arbitrage and Carry trade. Authors of this article in their critical approach to Arbitrage Pricing Theory (APT) pay attention to a definition of pricing arbitrage (in its classic and transitory forms). As a result it appears that in reality assumptions of APT theory by S. Ross do not comply with the classic definition of financial arbitrage.

2

The wheeled-tracked drive of a tractor

100%

Hlavna V. , Kral M.

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tom R. 95, z. 6-M

228-233

EN

The presentation deals with ways of possible increase in the engagement coefficient, decrease of the mean tractive consumption and increase in the use of a traction vehicle with a wheeled-tracked drive.

PL

W pracy omówiono możliwości zwiększenia sprawności układu gąsienicowego, zmniejszenia średniego zużycia paliwa oraz rozszerzenia zastosowań ciągników z napędem kołowo-gąsienicowym.

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Nest losses of cavity nesting birds caused by dormice [Gliridae, Rodentia]

100%

Adamik P. , Kral M.

Acta Theriologica

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2008

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tom 53

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nr 2

EN

Mammals are common predators on bird nests. However, their species identity frequently remains unknown. Here we present long-term data (1975–2005) from a central European woodland on the predatory effect of three dormice species (Rodentia, Gliridae) on cavity-nesting birds. Dormice are mostly frugivorous during the active late-summer season, but shortly after they terminate hibernation, they frequently depredate cavity-nesting-bird nests. The seven bird species studied, lost on average between 2.9 to 18.4% of their broods. MigratoryFicedula flycatchers suffered the highest brood losses, while the residentParus titmice and the nuthatchSitta europaea had much lower brood losses. The three dormice species differed significantly in their predatory effect during different avian breeding stages. The edible dormouseGlis glis (Linnaeus, 1766) depredated both eggs and nestlings equally, while the common dormouseMuscardinus avellanarius (Linnaeus, 1758) and the forest dormouseDryomys nitedula (Pallas, 1778) destroyed more nests during egg laying and the incubation period. Among adult birds, females were taken more frequently by dormice than males. Among avian species, adultFicedula flycatchers were more often depredated than the titmice and nuthatch. Our study provided further evidence, that among the traditional studies on the costs of reproduction, parental mortality at the nests needs to be considered and that incubating or brooding females might be under higher predation risk than the males.

4

Effect of probiotics and thyme essential oil on the essential amino acid content of the broiler chicken meat

80%

Alfaig E. , Angelovicova M. , Kral M. , Bucko O.

Acta Scientiarum Polonorum. Technologia Alimentaria

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2014

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tom 13

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nr 4

EN

Background. Differences in the types and percentages of essential amino acids (EAAs) in food could influence the value of protein consumed and proteins with a high content of EAAs are the most important components of poultry meat. The use of probiotics for meat and carcass quality improvement has been questioned, while feed supplementation with thyme essential oil (TEO) could be considered as useful natural supplement to be applied in the poultry industry to improve meat quality. Material and methods. Day-old broilers Ross 308 (n = 400) were randomly divided into four groups based on the feed supplement as follows: control, probiotics 0.05%, TEO 0.05% and combination of probiotics and TEO, while the fattening period was 42 days. Six birds of both sexes from each group were selected as a sample, slaughtered and then stored (-18°C) for 6 months till the analysis. The muscular homogeneous sample (50 g) ffom the breast and thigh of each sample bird was analysed by the Fourier Transform Inffared Spectroscopy method using the device Nicolet 6700. The essential amino acids content was determined and the ąuality indicators include Chemical score, amino acid score, EAA index and biological value were calculated. Results. The obtained results show that for all the tested EAAs of the breast and thigh muscles, the content numerically increased gradually and progressively within the groups as the control scored the minimum followed by the probiotics group, then the combination group and finally the TEO group which scored the highest results. Conclusion. It can be concluded that the TEO promoted the increase of all the EAAs and consequently the quality indicators with significant different compared with the control group and significantly different for some EAAs and quality indicators compared with the probiotics group and the combination group.

5

Agriculture of the Czech Republic in the 21st century: from productivism to post-productivism

80%

Veznik A. , Kral M. , Svobodova H.

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nr 4

6

Effect of probiotics and thyme essential oil on the texture of cooked chicken breast meat

70%

Alfaig E. , Angelovicova M. , Kral M. , Vietoris V. , Zidek R.

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nr 4

EN

Background. Texture is probably the single most critical quality factor associated with the consumers’ ultimate satisfaction with a poultry meat product and can be affectcd by several factors including the type of feed used for chickens fattening. The use of probiotics for meat and carcass quality improvement has been questioned, while the possibility of deposition of essential oils in various muscle tissues can alter the sensory attributes of the chicken’s meat. Material and methods. Probiotics and thyme essential oil in the percentage of 0.05% were used as feed supplements for Ross 308 broiler chickens, as the broilers were reared in four separated groups based on the feed supplement as follows: control, probiotics, thyme essential oil and combination of probiotics and thyme essential oil group, while the fattening period was 42 days. TA.XT Plus-Texture analyser apparatus was used for determination of the texture profile and Warner Bratzler shear force for the cooked breast meat. Results. Warner Bratzler shear test results showed that the tested feed additives were not affecting the texture of the chicken breast meat, while probiotic appears to have moderately effect on the hardness, cohesiveness, springiness and chewiness attributes of the cooked breast meat compared with the other groups, this effect of probiotics considered as negligible, as the results showed that all the tested groups meat were very tender according to the tendemess scale. Conclusions. According to the obtained results it can be concluded the combination of probiotics and thyme group resulted in the lowest score for the hardness, cohesiveness, springiness and chewiness attributes, while probiotics group scored the highest compared with the control.

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Wpływ Wołochów na kulturę pasterską i kuchnię Karpat

51%

Migdal W. , Golian J. , Marcincak S. , Kral M. , Walczycka M. , Domagala J. , Najgebauer-Lejko D. , Migdal L.

Przegląd Hodowlany

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2020

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tom 88

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nr 5