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2. Non-singular covers over ordered monoid rings
- Creator:
- Bican, Ladislav
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- hereditary torsion theory, torsion theory of finite type, Goldie’s torsion theory, non-singular module, non-singular ring, monoid ring, precover class, and cover class
- Language:
- English
- Description:
- Let G be a multiplicative monoid. If RG is a non-singular ring such that the class of all non-singular RG-modules is a cover class, then the class of all non-singular Rmodules is a cover class. These two conditions are equivalent whenever G is a well-ordered cancellative monoid such that for all elements g, h ∈ G with g < h there is l ∈ G such that lg = h. For a totally ordered cancellative monoid the equalities Z(RG) = Z(R)G and σ(RG) = σ(R)G hold, σ being Goldie’s torsion theory.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
3. Response to microclimate of morphological leaf attributes, photosynthetic and water relations of evergreen sclerophyllous shrub species
- Creator:
- Gratani, L.
- Format:
- Type:
- model:internalpart and TEXT
- Language:
- Multiple languages
- Description:
- Leaf adaptatíons of Quercus ilex L., Phillyrea latifolia L. and Pistacia lentiscus L. to various environmental conditions námely from the viewpoint of the differences of leaf area, dry mass, chlorophyll (Chl) content, sclerophylly index, succulence index and net photosynthetic rate are shown. Irradiance was the most important factor to miluence leaf temperature, stomatal conductance (g^) and transpiration rate (E). Under canopy layer low red-far red ratio reduced Pn- Shade leaves were enriched by Chl b. Chl content and sclerophylly index were good leaf characteristics to express adaptability of plants to microclimate.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
4. Toxoplasma gondii-altered host behaviour: clues as to mechanism of action
- Creator:
- Webster, Joanne P. and McConkey, Glenn A.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Toxoplasma gondii, rodents, behaviour, schizophrenia, mechanisms, and dopamine
- Language:
- English
- Description:
- A convincing body of evidence now exists, from both human and animal studies, and encompassing epidemiological to experimental, to indicate that the common protozoan Toxoplasma gondii can cause specific behavioural changes in its host. Such behavioural alterations are likely to be the product of strong selective pressures for the parasite to enhance transmission from its intermediate host reservoir, primarily rodent, to its feline definitive host, wherein sexual reproduction can occur and the parasite's life cycle completed. Here we consider what the available data to date may reveal about the potential mechanisms involved, the future research that needs to be performed, and the subsequent implications for animal and human health.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public