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Träfflista för sökning "WFRF:(Olsson Mats) srt2:(1995-1999)"

Sökning: WFRF:(Olsson Mats) > (1995-1999)

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  • Andreyev, Oleg A., et al. (författare)
  • Privatization of municipal property in Murmansk
  • 1995
  • Ingår i: Polar Geography. - : Taylor & Francis Group. - 1088-937X .- 1939-0513. ; 19:2, s. 88-106
  • Tidskriftsartikel (refereegranskat)abstract
    • This paper presents the results of a pilot study of privatization of municipal property in the Russian North based on data from the Murmansk city government. After a general overview of the process in Russia and Murmansk city, the paper outlines a number of positive and negative aspects of the privatization of city-owned enterprises on the basis of interviews conducted with the management of the newly privatized enterprises.
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5.
  • Baird, J C, et al. (författare)
  • Magnitude estimation of perceived odor intensity: Empirical and theoretical properties
  • 1996
  • Ingår i: Journal of Experimental Psychology: Human Perception and Performance. ; 22, s. 244-255
  • Tidskriftsartikel (refereegranskat)abstract
    • Four subjects judged the odor intensities of 7 pyridine concentrations and a blank. Computer simulations of a judgment model were compared with the empirical data. The model generates data patterns that closely mimic empirical findings. The following patt
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6.
  • Bemark, Mats, et al. (författare)
  • Purification and characterization of a protein binding to the SP6 κ promoter : A potential role for CArG-box binding factor-A in κ transcription
  • 1998
  • Ingår i: Journal of Biological Chemistry. - : Elsevier BV. - 0021-9258. ; 273:30, s. 18881-18890
  • Tidskriftsartikel (refereegranskat)abstract
    • A protein interacting with an A-T-rich region that is a positive control element within the SP6 κ promoter was purified and identified as CArG-box binding factor-A. The purified protein was shown to interact specifically with the coding strand of single-stranded DNA and, with lower affinity, with double-stranded DNA. A mutation that inhibited binding of the protein to the A-T-rich region also aborted the transcriptional stimulatory effect of the region. Two Ets proteins, PU.1 and elf-1, that have previously been shown to bind to an adjacent DNA element were shown to physically interact with CArG- box binding factor.A. An antiserum raised against the protein recognized two different forms indicating either that different splice-forms of CArG-box binding factor-A are expressed, or that the protein is subject to posttranslational modification.
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  • Bengtsson, Stefan, 1961, et al. (författare)
  • Integration of silicon and diamond, aluminum nitride or aluminum oxide for electronic materials
  • 1999
  • Ingår i: conference proceedings:III-V and IV-IV Materials and Processing Challenges for Highly Integrated Microelectronics and Optoelectronics. Symposium.. ; , s. 133-
  • Konferensbidrag (refereegranskat)abstract
    • Material integration for the formation of advanced silicon-on-insulator materials by wafer bonding and etch-back is discussed. Wafer bonding allows the combining of materials that it is not possible to grow on top of each other by any other technique. In our experiments, polycrystalline diamond, aluminum nitride or aluminum oxide films with thickness of 0.1-5 μm were deposited on silicon wafers. Bonding experiments were made with these films to bare silicon wafers with the goal of forming silicon-on-insulator structures with buried films of polycrystalline diamond, aluminum nitride or aluminum oxide. These silicon-on-insulator structures are intended to address self-heating effects in conventional silicon-on-insulator materials with buried layers of silicon dioxide. The surfaces of the deposited diamond films were, by order of magnitude, too rough to allow direct bonding to a silicon wafer. In contrast the deposited aluminum nitride and aluminum oxide films did allow direct bonding to silicon. Bonding of the diamond surface to silicon was instead made through a deposited and polished layer of polycrystalline silicon on top of the diamond. In the case of the aluminum nitride electrostatic bonding was also demonstrated. Further, the compatibility of these insulators to silicon process technology was investigated
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9.
  • Bergh, Gösta, et al. (författare)
  • Altered expression of the retinoblastoma tumor-suppressor gene in leukemic cell lines inhibits induction of differentiation but not G1-accumulation
  • 1997
  • Ingår i: Blood. - 1528-0020. ; 89:8, s. 2938-2950
  • Tidskriftsartikel (refereegranskat)abstract
    • The retinoblastoma tumor-suppressor gene, RB, has been implicated in tumor suppression, in regulation of the cell cycle, and in mediating cell differentiation. RB is necessary for hematopoiesis in mice, and aberrant RB-expression is associated with the progress and prognosis of leukemia. We have used antisense oligonucleotides, established clones stably expressing an antisense RB construct, and also established clones over expressing the retinoblastoma protein (pRb) to study the role of RB expression in monocytic differentiation induced by all-trans retinoic acid (ATRA) or 1-alpha-25-dihyroxycholecalciferol (Vit D3) in the monoblastic cell line U-937 and erythroid differentiation induced by transforming growth factor beta1 (TGFbeta1) and hemin in the erythroleukemic cell line K562. A reduction in pRb production in antisense RB-transfected U-937 clones was shown. Antisense oligonucleotides as well as expression of the antisense RB construct suppressed differentiation responses to ATRA or Vit D3, as judged by the capability to reduce nitro blue tetrazolium, by the appearance of monocyte-related cell surface antigens and by morphologic criteria. K562 cells showed decreased differentiation response to TGFbeta1, but not to hemin, when incubated with antisense oligonucleotides. U-937 antisense RB-transfected cells were also suppressed in their ability to upregulate levels of hypophosphorylated pRb when induced to differentiate. Although U-937 cells incubated with antisense oligonucleotides and clones expressing the antisense RB construct were hampered in their ability to differentiate on incubation with ATRA or Vit D3, the induced G0/G1-accumulation was similar to differentiating control cells treated with ATRA or Vit D3. Intriguingly, U-937 clones overexpressing RB were also inhibited in their differentiation response to ATRA or Vit D3 but not inhibited in their ability to respond with G0/G1 accumulation when induced with these substances. The results indicate that pRb plays a role in induced differentiation of U-937 cells as well as K562 cells involving mechanisms that, at least partially, are distinct from those inducing G1 accumulation.
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10.
  • Bignert, Anders, et al. (författare)
  • Temporal trends of organochlorines in Northern Europe, 1967–1995. Relation to global fractionation, leakage from sediments and international measures
  • 1998
  • Ingår i: Environmental Pollution. - 0269-7491 .- 1873-6424. ; 99:2, s. 177-198
  • Tidskriftsartikel (refereegranskat)abstract
    • The time trend monitoring of organochlorine pollution was carried out in Sweden since the late 1960s. This report presents data on concentrations of DDT, PCB, HCHs and HCB in biota samples collected and analysed annually. All the matrices and compounds studied show a significant decrease over time. The data cover severely polluted Swedish marine and fresh water in southern Sweden as well as locally unpolluted waters in remote northern Arctic regions of Sweden. A total of 13 time series representing different locations and species are presented for the different pollutants. The period studied covers the time when pollution was serious as well as the time of recovery. All monitoring activities were carried out at the same laboratories over the entire study period, which means that comparability over time is good in the sets of data presented. The various time trends show a convincing agreement with trends and annual change over time, although the concentrations differ between the species and locations investigated, the highest concentrations being in the south. Since the annual changes are normally similar regardless of locations and species, spatial variations in concentrations remain over time, although concentrations are lower today. The onset of changes in concentrations over time can be related to international measures or other circumstances that lowered releases into the environment. Similarities in the annual changes, as well as the time when changes began, are discussed with respect to suggested hypotheses on the fate of the investigated organochlorines. It was not possible to verify that the oxygenation of anoxic sediments mobilised old pollution in Baltic sediments. Neither was it possible to conclude that eutrophication has caused a measurable effect on the rate and timing of the decreases. Finally, long-range transport to Arctic regions seems to be due more to a one step transport than to the ‘Grass-hopper’ effect. The comprehensive database used, clearly shows how important it is to have datasets big enough to describe between-year variation before attempting to evaluate the time trend. In addition, if between-year variation is not known, it is then also difficult to evaluate spatial variation on the basis of single year observations.
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  • Resultat 1-10 av 103
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