| 1. |
- Almbladh, Carl-Olof, et al.
(author)
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BANDSTRUCTURE AND LOCALIZED DESCRIPTIONS OF NARROW-BAND SYSTEMS
- 1988
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In: Narrow-Band Phenomena—Influence of Electrons with Both Band and Localized Character. ; 184, s. 81-89
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Book chapter (peer-reviewed)abstract
- In this note I would like to give some personal views on the relevance of bandstructure treatments of narrow-band systems. At first sight one might think that bandstructure theory is not a very appropriate framework for quasi-localized electrons. Nevertheless, it has been found that density-functional (DF) theory in its modern form gives a rather impressive description of ground-state properties for the majority of systems, not only " in principle " but also in practice via calculations based on the local-density approximation (LDA). I will here discuss some key concepts in DF theory with emphasis on physical significance of the eigenvalues which appear in the DF one-electron-like equations. I will also to some extent discuss the dynamical selfenergy Σ, which describes the " one-electron " excitations reached by adding or removing an electron, although there is very little work done for narrow-band electrons.
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| 2. |
- Downs, Mark E.A., et al.
(author)
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Optical and electrochemical detection of DNA
- 1988
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In: Biomaterials. - : Elsevier. - 0142-9612 .- 1878-5905. ; 9:1, s. 66-70
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Journal article (peer-reviewed)abstract
- There is a growing demand for the production of a DNA biosensor with applications in medicine, the food industry, agriculture, veterinary science and environmental science. In this paper we describe methods for the optical and electrochemical detection of DNA using the enzyme horseradish peroxidase (EC 1.11.1.7) and glucose oxidase (EC 1.1.3.4). We have used bis-methylacridinium nitrate and luminol for the optical detection of DNA using a purpose built, inexpensive luminometer. Using this system detection limits of 10−11g of plasmid DNA have been observed. Electrochemical detection of DNA was carried out by the use of a fluoride ion selective electrode and stripping voltametry. DNA was detected down to 1 (10−9 − 10−10g of DNA by the enzymatic release of halogen ions from organohalogen compounds.
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| 3. |
- Ekström, Peter, et al.
(author)
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Antibodies against retinal photoreceptor‐specific proteins reveal axonal projections from the photosensory pineal organ in teleosts
- 1987
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In: Journal of Comparative Neurology. - : Wiley. - 0021-9967. ; 265:1, s. 25-33
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Journal article (peer-reviewed)abstract
- With the aid of specific antisera to the retinal proteins S‐antigen and α‐transducin and to the rhodopsin apoprotein opsin, we have labeled various cell populations in the pineal organ, parapineal organ, habenular nucleus, and subcommissural organ in two teleost species: the rainbow trout and the European minnow. Although these proteins are associated with photoreceptor functions, not only photoreceptor cells but also the majority of parenchymal cells in the pineal organ were immunoreactive. Immunoreactive cells with dendrite‐ and axonlike processes were observed also in the parapineal organ and the habenular nucleus. Furthermore, S‐antigen‐immunoreactive, long, axonal processes were observed in the pineal organ and could be traced from the pineal organ to the habenular nucleus and to the pretectal area. In the light of recent HRP electron microscopical and immunocytochemical studies we propose (1) that not only the classical pineal photoreceptor cells of poikilothermic vertebrates but also other types of CSF‐contacting neurons may be the phylogenetic ancestors of mammalian pinealocytes, and (2) a close interrelationship between the pineal organ and the limbic system, effectuated by the direct projections from pineal photoreceptors/CSF‐contacting neurons/pinealocytes to the habenular nucleus, and by displaced “pinealocytelike” elements scattered in the habenular nucleus.
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| 4. |
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| 5. |
- Wood, Sidney A J, et al.
(author)
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The role of the pharynx in speech.
- 1986
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In: Otolaryngology - head and neck surgery. Vol. 3, Larynx/hypopharynx, trachea/esophagus, thyroid/parathyroid. - 0801613280
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Book chapter (other academic/artistic)abstract
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| 6. |
- Åström, Karl Johan, et al.
(author)
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Expert Control
- 1986
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In: Automatica. - : Elsevier BV. - 0005-1098. ; 22:3, s. 277-286
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Journal article (peer-reviewed)abstract
- There has been substantial progress in the theory and practice of automatic control through application of mathematical analysis and numerics. Symbolic data processing has, however, so far only had marginal influence on control systems despite the fact that the actual engineering of control systems contains a substantial amount of heuristic logic. This paper shows how the logic may be replaced by an expert system. This leads to simplification of conventional systems and makes it possible to obtain control systems with new capabilities.
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