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| 6. |
- Ahlenius, Sven, et al.
(author)
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Prolongation of the ejaculation latency in the male rat by thioridazine and chlorimipramine.
- 1979
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In: Psychopharmacology. - 0033-3158 .- 1432-2072. ; 65:2, s. 137-140
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Journal article (peer-reviewed)abstract
- Thioridazine (3 mg/kg) and chlorimipramine (1.5–6.0 mg/kg) prolonged the ejaculation latency and increased the number of mounts but did not change the number of intromissions preceding ejaculation. Blockade of peripheral and central noradrenaline receptors by phentolamine and phenoxybenzamine respectively resulted in a suppression of all aspects of the sexual behavior with increasing doses. dl-5-HTP (25–100 mg/kg) in combination with an inhibitor of peripheral 5-HTP decarboxylase (benserazide, 25 mg/kg) produced, like chlorimipramine and thioridazine, a prolongation of ejaculation latency and an increase in the number of mounts preceding ejaculation. Selective inhibition of 5-HT reuptake however, by zimelidine (0–20 mg/kg) or alaproclate (0–20 mg/kg) did not affect the mating behavior. At higher doses of these drugs some animals failed to initiate sexual activities. There was an increase in the postejaculatory interval but no change in the ejaculatory latency.It is concluded that the prolonged ejaculation latencies observed following treatment with thioridazine or chlorimipramine is not due to a blockade of central or peripheral adrenergic -receptors.
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| 17. |
- Akselsson, Roland, et al.
(author)
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PIXE Analysis Research in Lund
- 1979
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In: IEEE Transactions on Nuclear Science. - 0018-9499. ; NS-26:1, s. 1358-1362
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Journal article (peer-reviewed)abstract
- Protons or a-particles from a 3 MV tandem Pelletron are used to induce characteristic x-rays, which are detected by a Si(Li)-detector. To optimize the quality and speed of data taking we use an absorber with a hole, pile-up rejection and on-demand beam. Forty samples may be entered simultaneously into the vacuum, and their positioning is operated by pushbuttons. The system is prepared for minicomputer steering. PIXE is combined with analysis of backscattered particles and in some cases γ-ray detection from a 19F(p,αγ) 160-reaction. At different stages of development we have a bent-chrystal spectrometer, microbeam and facilities to extract the beam from vacuum. In the introduction of PIXE to applied fields, it is important, that physicists take part in identifying, planning and performing suitable projects e.g. experiments where rapid multielemental analysis of many samples is crucial. In Lund we investigate the elemental composition of size-fractionated airborne particles from work environments and ambient air. The objectives are then to learn about sources, transport and deposition of particles and to contribute to the understanding of relations between exposure and health effects. We are also developing procedures for trace elemental analysis of water. Detection limits in the range of 0.1 ppb have been demonstrated. In other projects in progress biological and mineralogical samples are analysed.
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| 18. |
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Aktuell litteratur
- 1979
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In: Kulturminnesvård. - Stockholm : Riksantikvarieämbetet. - 0346-9077. ; :3, s. 35-38
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Journal article (pop. science, debate, etc.)
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| 19. |
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| 20. |
- Alexandersson, Kerstin, 1940-
(author)
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Remisser och yttranden : förenklad byggnadslovsprövning
- 1979
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In: Kulturminnesvård. - Stockholm : Riksantikvarieämbetet. - 0346-9077. ; :1, s. 42-48
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Journal article (pop. science, debate, etc.)abstract
- Enligt betänkandet skall en förenklad byggnadslovsprövning i första hand uppnås genom slopandet av byggnadslovsplikten för vissa åtgärder. Det framhålls dock att byggnader av kulturhistoriskt intresse givetvis inte får förvanskas genom okontrollerade åtgärder. Riksantikvarieämbetet har yttrat sig över rubr betänkande, (Ds Bo 1978:3).
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| 21. |
- Alexandersson, Kerstin
(author)
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Riktlinjer för energipolitiken
- 1979
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In: Kulturminnesvård. - Stockholm : Riksantikvarieämbetet. - 0346-9077. ; :3, s. 25-27
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Journal article (pop. science, debate, etc.)abstract
- Den 9 mars 1979 presenterade regeringen en ny energipolitiskproposition (1978/79:115). I propositionen föreslås riktlinjernaför energipolitiken fram till omkring 1990.
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| 22. |
- Alfvén, Hannes
(author)
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Annihilation model of quasi-stellar objects
- 1979
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In: Astrophysics and Space Science. - : Kluwer Academic Publishers. - 0004-640X .- 1572-946X. ; 64:2, s. 401-419
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Journal article (peer-reviewed)abstract
- The possibility that annihilation is a major source of energy in cosmic physics is discussed. Since Klein suggested that the Universe might be matter-antimatter symmetric over two decades ago, there have been a significant number of papers developing the consequences of this view. These, however, have been largely ignored in the general literature. There have also been a number of papers claiming to prove that there cannot be antimatter anywhere in the observable Universe. In the first part of this paper an assessment of the differing views is given, and it is shown that none of the arguments against antimatter is convincing. The existence of antimatter is not in conflict with any observational fact. The reason for the negative attitude towards the existence of antimatter seems to be that this view is in conflict with a number of speculative but ‘generally accepted’ theories. However, recent magnetospheric and heliospheric research, includingin situ measurements of cosmic plasmas, is now drastically changing cosmic plasma physics in a way that leads to growing scepticism about quite a few of the speculative theories.An attempt is made to develop a simple phenomenological model of QSOs based on star-antistar collisions. This model can account for such basic observational properties as the acceleration to very large (non-cosmological) velocities, the existence of broad emission lines, and at the same time narrow absorption lines with different redshifts. The absence of blueshifts is also explained. The model predicts that relatively young QSOs should be at cosmological distances whereas the old ones may very well be much closer to us than indicated by their redshift.
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| 25. |
- Alfvén, Hannes
(author)
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Electric-current model of the magnetosphere
- 1979
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In: ESA Journal. - : European Space Agency. - 0379-2285. ; 3:2, s. 91-99
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Journal article (peer-reviewed)abstract
- A translation of the traditional field description of the magnetosphere into a particle (electric current) description is offered. Focus is on the energy transfer from the solar wind. The solar wind flow through the magnetic field acts as an electric generator. Its power is transferred to the magnetosphere through four main circuits. These are the magnetopause circuit, the solar wind/auroral circuit, the tail circuit, and the front circuit. A fifth circuit, the substorm circuit, is also very often energized. When the tail circuit flares, the current is partly redirected over the auroral zone, flowing in what is called the 'substorm circuit'.
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| 27. |
- Alfvén, Hannes
(author)
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Hubble expansion in a Euclidean framework
- 1979
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In: Astrophysics and Space Science. - : Kluwer Academic Publishers. - 0004-640X .- 1572-946X. ; 66:1, s. 23-37
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Journal article (peer-reviewed)abstract
- There now seems to be strong evidence for a non-cosmological interpretation of the QSO redshift — in any case, so strong that it is of interest to investigate the consequences. The purpose of this paper is to construct a model of the Hubble expansion which is as far as possible from the conventional Big Bang model without coming in conflict with any well-established observational results (while introducing no new laws of physics). This leads to an essentially Euclidean metagalactic model (see Table I) with very little mass outside one-third or half of the Hubble radius. The total kinetic energy of the Hubble expansion need only to be about 5% of the rest mass energy.Present observations support backwards in time extrapolation of the Hubble expansion to a ‘minimum size galaxy’R m , which may have any value in 0Some of the conclusions based on the Big Bang hypothesis are criticized and in several cases alternative interpretations are suggested. A comparison between the Euclidean and the conventional models is given in Table III.
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| 28. |
- Alfvén, Hannes
(author)
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Observations and cosmology
- 1979
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In: Chemiker-Zeitung. - : Dr. Alfred Hüthig Verlag, GMBH, Heidelberg. - 0009-2894. ; 103:10, s. 334-336
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Journal article (other academic/artistic)
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| 29. |
- Alfvén, Hannes
(author)
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Origin of cosmic magnetic-fields
- 1979
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In: Physics of the Earth and Planetary Interiors. - : Elsevier BV. - 0031-9201 .- 1872-7395. ; 20:2-4, s. 185-191
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Journal article (peer-reviewed)abstract
- A summary is given of the reasons why an understanding of cosmic hydromagnetic phenomena is impossible without describing them explicitly by electric currents. This applies also to the production of cosmic magnetic fields. The purpose of the paper is to demonstrate that a simple translation from the traditional magnetic field description to a current description gives important new aspects of cosmical electrodynamics, including a new approach to the production of magnetic fields.One of the results is that the kink-instability of electric currents is found to be the basic physical phenomenon responsible for magnetic flux generation in cosmical physics. Laboratory plasma experiments demonstrate the existence of a simple mechanism for flux amplification, and it seems obvious that the same mechanism should work also under cosmical conditions.A simple model is discussed. We start from a poloidal magnetic field (which may be extremely weak). Differential motions change the field configuration which means that kinetic energy is transferred into magnetic energy of induced toroidal fields. The currents associated with these get unstable when the toroidal energy exceeds the poloidal energy resulting in an amplification of the original poloidal field.This simple process of transfer of kinetic energy into poloidal magnetic energy is probably the main mechanism for magnetic flux generation in low density cosmic plasmas. In view of the serious difficulties of planetary dynamo theories, attempts should be made to develop it into a theory of the magnetization of celestial bodies.
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| 30. |
- Alfvén, Hannes
(author)
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Science, progress and destruction
- 1979
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In: Bulletin of the atomic scientists. - Chicago, Ill. : Educational Foundation for Nuclear Science. - 0096-3402 .- 1938-3282. ; 35:3, s. 68-71
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Journal article (peer-reviewed)
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| 31. |
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| 35. |
- Allard, Elisabeth, 1932-
(author)
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Råd och anvisningar till vattenärenden
- 1979
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In: Kulturminnesvård. - Stockholm : Riksantikvarieämbetet. - 0346-9077. ; :6, s. 41-
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Journal article (pop. science, debate, etc.)abstract
- Råd och anvisningar för kulturminnesvårdens medverkan konmer att utarbetas av riksantikvarieämbetet. Vattenlagsutredningens betänkande från 1977 kommer att behandlas av lagrådet under våren 1980. Ämbetet vill avvaktaden slutliga behandlingen av lagförslaget.
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| 36. |
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| 37. |
- Allwood, Jens, 1947
(author)
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Ickeverbal kommunikation - en översikt
- 1979
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In: In: Stedje, A., & af Trampe, P. (eds.) Tvårspråkighet (Papers from the Second Nordic Conference on Bilingualism). Stockholm: Akademilitteratur. - 9174100904
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Journal article (peer-reviewed)
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| 38. |
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| 41. |
- Alm Carlsson, Gudrun
(author)
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Burlins kavitetsteori
- 1979
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Reports (other academic/artistic)abstract
- Burlins kavitetsteori är en generell teori i den meningen att inga krav finns på detektorns dimensioner jämfört med sekundärelektronernas räckvidder. Detektorn måste dock vara "tunn" för fotonerna dvs inte ge någon nämnvärd attenuering av de mot detektorn infallande fotonerna
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| 46. |
- Alm, Ove, et al.
(author)
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Thermal conductivity of NaF at high pressures
- 1979
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In: High Temperatures-High Pressures. - 0018-1544 .- 1472-3441. ; 11, s. 339-341
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Journal article (peer-reviewed)abstract
- The thermal conductivity, λ, of NaF was measured over the pressure range 0-3 GPa at room temperature. An approximately linear variation of λ with P was observed in this range, and the ratio λ(P)/λ(0) was found to be 1.12 for P = 1 GPa.
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| 47. |
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| 48. |
- Alpgård, Kim, 1944-
(author)
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Properties of strange particles produced in proton-proton interactions at 19 GeV/c
- 1979
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Doctoral thesis (other academic/artistic)abstract
- Production of strange particles in proton-proton interactions at 19 GeV/c is studied. The experiment has been carried out within the Scandinavian Bubble Chamber collaboration and is based on 400.000 pictures exposed at the CERN 2m Hydrogen Bubble Chamber. The main emphasis is on final states containing 2 seen neutral strange particles, viz. AK0 or K0K-0, which are compared with final states containing only one seen strange particle. General aspects on the production properties are presented as well as a more detailed investigation of the polarization properties of the A-hyperon. A search for charmed final states in our sample of neutral strange particles is presented as well.
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| 49. |
- Alsmark, Gunnar
(author)
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Herdar på Korsika
- 1979
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Doctoral thesis (other academic/artistic)
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| 50. |
- Aly, Gharib, et al.
(author)
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Simulation and design of distillation units for treatment of sulphite pulping condensates to recover methanol and furfural. Part II: Applicability of multi-effect distillation using live steam
- 1979
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In: Canadian Journal of Chemical Engineering. - : Wiley. - 0008-4034 .- 1939-019X. ; 57:3, s. 316-320
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Journal article (peer-reviewed)abstract
- A distillation unit has been designed for a capacity of 73 t/h of condensate and for at least 90% recovery of the contaminating organics. This unit consists of three columns: a primary stripper to remove volatile organics and two upgrading columns to purify the methanol and furfural byproducts. Three different energy-saving alternatives for satisfying the energy requirements have been studied: utilisation of secondary steam from the evaporation plant, and application of the principle of multi-effect distillation in one-stripper and in two-stripper configurations. Investment cost needed in all alternatives amounts to 5.5–6.0 MCr (millions of Swedish Crowns) while operating cost varies between 0.8–3.1 MCr. The first design alternative has a payoff period of 2.3 years while the two multi-effect distillation alternatives have a payoff period of about 3 years.
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