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Träfflista för sökning "LAR1:lu ;lar1:(lnu);srt2:(1985-1989)"

Sökning: LAR1:lu > Linnéuniversitetet > (1985-1989)

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1.
  • Berggren, Lars, et al. (författare)
  • Arbetsmiljö, hälsa och arbetarskydd
  • 1988. - 1
  • Ingår i: Metall 100 år. - Stockholm : Svenska metallindustriarbetarförbundet. ; , s. 53-82, s. 53-82
  • Bokkapitel (populärvet., debatt m.m.)
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2.
  • Larsson, Per, et al. (författare)
  • An attempt to measure the flow of chlorinated hydrocarbons, such as PCBs, from water to air in the field
  • 1987
  • Ingår i: Environmental Pollution. - : Elsevier BV. - 0269-7491 .- 1873-6424. ; 44:3, s. 219-225
  • Tidskriftsartikel (refereegranskat)abstract
    • A field sampling device to study the transport of aromatic, persistent chlorinated hydrocarbons from water to air was constructed. It was tested in large, outdoor artificial ponds contaminated with polychlorinated biphenyls (PCBs). The PCB compounds volatilised to air at a rate of 0·9 to 9·6 ng m−2 h−1 depending on levels of PCBs in the water and water temperature. 
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3.
  • Larsson, Per, et al. (författare)
  • Atmospheric transport of chlorinated hydrocarbons to Sweden 1985 compared to 1973
  • 1989
  • Ingår i: Atmospheric Environment. - : Elsevier BV. - 1352-2310 .- 1873-2844 .- 0004-6981. ; 23:8, s. 1699-1711
  • Tidskriftsartikel (refereegranskat)abstract
    • The atmospheric fallout of DDT and DDE (ΣDDT) over Sweden has decreased during the last decade. Today long-range transport from southern sources outside the country dominates the inflow. This was reflected in a decreasing south-to-north gradient of the compounds in atmospheric deposition and in the lower atomosphere. The fallout of PCBs was similar in 1984–1985 and 1972–1973, and today local contamination by combustion is more prominent than it was 10 years ago, even though PCB restrictions have been in force during the interim. Since PCB deposition is higher in the coastal areas than in the inland regions, other sources, such as volatilization from the seas and long-range transport also contribute to PCBs in fallout. The levels of PCB and ΣDDT in the lower atmosphere were positively correlated with temperature. Consequently, the compounds tended to be in the gas phase during the warmer summer period whereas during winter they were more liable to be adsorbed to particles, partition to airborne water and contribute in fallout. From each sampling station a chromatographic 'fingerprint' of pollutants in airborne fallout and in the lower atmosphere was obtained. The fingerprint was the combined result of the station's location and climate. The results show that considerable amounts of chlorinated pollutants are being transported to and within Sweden via the atmosphere. 
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4.
  • Larsson, Per, et al. (författare)
  • Microbial degradation of xenobiotic, aromatic pollutants in humic water
  • 1988
  • Ingår i: Applied and Environmental Microbiology. - 0099-2240 .- 1098-5336. ; 54:7, s. 1864-1867
  • Tidskriftsartikel (refereegranskat)abstract
    • The microbial degradation of a number of 14C-labeled, recalcitrant,aromatic pollutants, including trichloroguaiacol and di-, tri-,and pentachlorophenol, was investigated in aquatic model systemsin the laboratory. Natural, mixed cultures of microorganismsin the water from a brown-water lake with a high content ofhumic compounds mineralized all of the tested substances toa higher degree than did microorganisms in the water from aclear-water lake. Dichlorophenol was the most rapidly degradedpollutant. 
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5.
  • Okla, Lennart, et al. (författare)
  • Day-night differences in volatilization rates of polychlorinated biphenyls from water to to air
  • 1987
  • Ingår i: Environmental Toxicology and Chemistry. - : Wiley. - 0730-7268 .- 1552-8618. ; 6:9, s. 659-662
  • Tidskriftsartikel (refereegranskat)abstract
    • The transport rate of polychlorinated biphenyls (PCBs) from water to air was followed in a large (50-m3) artificial pond. The transport rate across the water/air interface during the day exceeded the rate at night and was positively correlated to air temperature. Volatilization is probably responsible for the PCB transfer. 
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6.
  • Olofsson, Gunnar, et al. (författare)
  • Marx som samhällsvetenskaplig teoretiker
  • 1988
  • Ingår i: Samhällsvetenskapens klassiker. - Lund : Studentlitteratur AB. - 9144251211 ; , s. 145-172
  • Bokkapitel (övrigt vetenskapligt/konstnärligt)
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7.
  • Rodriguez, G, et al. (författare)
  • Sex differences in regional cerebral blood flow.
  • 1988
  • Ingår i: Journal of Cerebral Blood Flow and Metabolism. - : SAGE Publications. - 0271-678X .- 1559-7016. ; 8:6, s. 783-789
  • Tidskriftsartikel (refereegranskat)abstract
    • Regional cerebral blood flow was measured by the 133-xenon inhalation method during resting in 38 healthy men and 38 healthy women matched pairwise for age in the range 18-72 years. The results showed 11% higher global flow level in the women in all ages. A similar and significant regression of flow by age was seen for both sexes. The regional flow distribution also showed some sex-related differences. Frontal regions showed an asymmetry in the men with higher values on the right side. The female flows were more symmetric. As a hypothesis, it is suggested that the higher flow level in women may be a systemic phenomenon. In fact, other authors have found a higher cardiac index in females. The sex differences in regional flow pattern might be due to differences in the functional organization of the cortex and/or to differences in the mental processes of the "resting" state.
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8.
  • Tunving, K, et al. (författare)
  • Regional cerebral blood flow in long-term heavy cannabis use.
  • 1986
  • Ingår i: Psychiatry Research. - : Elsevier BV. - 0165-1781 .- 1872-7123. ; 17:1, s. 15-21
  • Tidskriftsartikel (refereegranskat)abstract
    • Regional cerebral blood flow (rCBF) was measured by the 133Xenon inhalation method in nine male chronic cannabis users. The rCBF level in cannabis users was significantly (11%) lower than that of age- and sex-matched healthy controls. Four of the subjects were reexamined after 9-60 days of detoxification and showed a significant (12%) increase of the CBF level at followup. No significant regional flow abnormalities were noted. The global CBF reduction seen in the early phase of detoxification is most likely the consequence of the dysfunction of the central nervous system accompanying chronic cannabis use.
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9.
  • von Schantz, Torbjörn, et al. (författare)
  • Female choice selects for a viability-based male trait in pheasants
  • 1989
  • Ingår i: Nature. - : Springer Science and Business Media LLC. - 0028-0836 .- 1476-4687. ; 337, s. 166-169
  • Tidskriftsartikel (refereegranskat)abstract
    • Recent theory on sexual selection1–4 suggests that females in species without paternal care choose mates by their secondary sexual characters because these indicate genotypic quality which will be transmitted to the offspring. These ideas are not yet empiri-cally supported as data quantifying the relationship between female mate choice and female reproductive success are lacking. Only in one case, in Colias butterflies, has it been demonstrated unequivo-cally that females choose 'good genotypes' as mates5 and there is only one study, on Drosophila, demonstrating that mate choice increases one component of offspring fitness6. Spur length of male pheasants (Phasianus colchicus) correlates with various fitness-related properties7. We here present the first experimental field data showing that female pheasants select mates on the basis of male spur length and that female mate choice correlates with female reproductive success. 
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10.
  • Weich, R G, et al. (författare)
  • Extracellular alkaline phosphatase activity in Ulva lactuca L
  • 1989
  • Ingår i: Journal of Experimental Marine Biology and Ecology. - : Elsevier BV. - 0022-0981 .- 1879-1697. ; 129:1, s. 33-44
  • Tidskriftsartikel (refereegranskat)abstract
    • Extracellular alkaline phosphatase activity (APA) was detected in the marine macroalga Ulva lactuca, cultivated in laboratory conditions under phosphate limitation. Algal discs were grown in continuous light and in darkness for a maximum of 205 h in sterilized seawater supplied with ammonium nitrate and various phosphate concentrations. APA and phosphate uptake in U. lactuca was stimulated in light whereas inhibition was detected in darkness. APA increased significantly during the cultivation in a phosphate-deficient medium but was suppressed at high external phosphate concentrations. In addition, pretreatment in penicillin over 48 h markedly enhanced enzyme activity during P limitation. The pretreatment in penicillin reduced the number of surface-associated bacteria. Our results indicate that APA in U. lactuca was dependent on the external phosphate concentration, energy from photophosphorylation and bacteria. Since intracellular polyphosphates and an orthophosphate pool still were displayed in 31P NMR spectra after cultivation at phosphate-limiting conditions, P deficiency was not suggested. Unfortunately, NMR spectra reflect total amounts of P compounds and local differences in the P status of the multicellular tissue could not be distinguished. Postulating a negative correlation between the P status and APA, a lower P status in meristematic areas during P limitation was suggested. Alkalisation of the growth medium during algal growth in light, and/or intracellular pH changes may additionally have affected enzyme production. 
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