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nr 4(60)
269-278
EN
In the final chapter of 'Utilitarianism', J.S. Mill accounts for a distinctive feature of morality by calling upon the categories of compulsion and punishment. At the same time, he attempts to distinguish justice from other branches of morality. In doing this, he falls back on the distinction between duties of perfect and imperfect obligation: the former, unlike the latter, confer on some people certain rights. However, Mill does not explain how it is possible for the province of beneficence to bear this characteristic and yet remain within morality regarded as the domain of sanction and compulsion. The purpose of the paper is to try to resolve the problem in question on the basis of an expressivistic metaethical theory which draws on Mill's work. According to this approach, the distinctive feature of moral statements lies in the fact that they express the acceptance of two norms: the first one 'prima facie' prescribes to everyone that the judged thing is to be chosen or forbids it and the second 'prima facie' tells everyone to act so as to effectively influence those who do not observe the former norm. Then, the domain of perfect obligation is explained as constituted by these moral judgements which are accompanied by negative evaluations of acts consisting in tolerating an individual's breaking (or aiming to break) the first norm. Respectively, supererogation is taken to be bound up with positive evaluations of tolerance for people who do not act in the required way. Thus, supererogatory judgements belong to the province of morality because they are connected with the acceptance of the norm exhorting to influence perpetrators, and yet they do not cease to be norms of beneficence, for they are bound up with the judgements which prohibit resorting to coercive measures against wrongdoers. Very importantly, the postulated solution is fully compatible with adopting a utilitarian stance in normative ethics.
12
Content available Przemiany metanu w środowiskach torfowych
51%
EN
The aim of our study was to identify the methanotrophic group of bacteria inhabiting coal mine rocks at the Jastrzębie-Moszczenica (Jas-Mos) coal mine, by application of molecular techniques: polymerase chain reaction (PCR) and fluorescence in situ hybridization (FISH). In the first stage of the experiment, methanotrophic activity (AM) of the rock material at different temperatures (20 and 30ºC) and methane (CH₄) concentrations (1, 5, 10, 20%) was determined. AM noted both in 20 and 30ºC reached a similar level equaling c.a. 0.2 µM CH₄ g⁻¹·day⁻¹. The PCR reactions were performed using primers specific for pmoA gene (encoding a key subunit of particulate methane monooxygenase) – A189f and mb661, whereas FISH was realized with Mg705, Mg84 (Type I of methanotrophs), and Ma450 (Type II of methanotrophs) probes. Sequence analysis of pmoA gene demonstrated that microorganisms, being present in the investigated rocks material were similar with 95-100% identity to the following methanotrophs genera: Methylosinus, Methylobacter, Methylocystis. Concentrations of CH₄ between 1-10% did not affect on bacterial variability, but in combination with 20% of CH₄, significant dominance of methanotrophic bacteria Type I was stated.
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