| 1. |
- Aspengren, Sara, 1977, et al.
(author)
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Noradrenaline- and melatonin-mediated regulation of pigment aggregation in fish melanophores
- 2003
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In: Pigment Cell Research. - : Wiley. - 0893-5785. ; 16:1, s. 59-64
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Journal article (peer-reviewed)abstract
- The effects of melatonin and noradrenaline (NA) on bi-directional melanosome transport were analysed in primary cultures of melanophores from the Atlantic cod. Both agents mediated rapid melanosome aggregation, and by using receptor antagonists, melatonin was found to bind to a melatonin receptor whereas NA binds to an α2-adrenoceptor. It has previously been stated that melatonin-mediated melanosome aggregation in Xenopus is coupled with tyrosine phosphorylation of a so far unidentified high molecular weight protein and we show that although acting through different receptors and through somewhat different downstream signalling events, tyrosine phosphorylation is of the utmost importance for melanosome aggregation mediated by both NA and melatonin in cod melanophores. Together with cyclic adenosine 3-phosphate-fluctuations, tyrosine phosphorylation functions as a switch signal for melanosome aggregation and dispersion in these cells.
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| 2. |
- Karlsson, Per Erik, 1957, et al.
(author)
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A cumulative ozone uptake-response relationship for the growth of Norway spruce saplings
- 2004
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In: Environmental Pollution. - : Elsevier BV. - 0269-7491. ; 128:3, s. 405-417
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Journal article (peer-reviewed)abstract
- Norway spruce saplings [Picea abies (L.) Karst.] were exposed during four growing seasons to different ozone treatments in open-top chambers: charcoal filtered air (CF), non-filtered air (NF) and non-filtered air with extra ozone (NF+, 1.4xambient concentrations). The CF and NF + ozone treatments were combined with phosphorous deficiency and drought stress treatments. The total biomass of the trees was harvested at different intervals during the experimental period. The ozone uptake to current-year needles of the Norway spruce saplings was estimated using a multiplicative stomatal conductance simulation model. There was a highly significant correlation between the reduction of total biomass and the estimated cumulative ozone uptake, which did not vary when different thresholds were applied for the rate of ozone uptake. The reduction of the total biomass was estimated to 1 per 10 mmol m(-2) cumulated ozone uptake, on a projected needle area basis. (C) 2003 Elsevier Ltd. All rights reserved.
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| 3. |
- Karlsson, Per Erik, 1957, et al.
(author)
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Impact of ozone on the growth of birch (Betula pendula) saplings
- 2003
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In: Environmental Pollution. - 0269-7491. ; 124:3, s. 485-495
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Journal article (peer-reviewed)abstract
- Saplings of one half-sib family of birch, Betula pendula, were exposed to three levels of ozone in open-top chambers (OTCs) during two growing seasons 1997-1998. The ozone treatments were non-filtered air (NF, accumulated daylight AOT40 over the two growing seasons of 3.0 mul l(-1) h), non-filtered air with extra ozone (NF +, accumulated daylight AOT40 of 27.3 mul l(-1) h) and nonfiltered air with additional extra ozone (NF++, accumulated daylight AOT40 of 120 mul l(-1) h), The birch saplings, including the roots, were harvested after the first and second growing seasons. After the first growing season, the NF++ treatment reduced the total wood biomass by 22%, relative to the NF treatment. There was no further reduction of the total wood biomass in the NF++ treatment after the second growing season. The root biomass was reduced by 30% after the first growing season. The shoot/root ratio, as well as the proportional biomass of leaves, were increased by ozone during both years. The ozone impact on the relative growth rate was estimated to -2% per 10 mul l(-1) h daylight AOT40 per growing season. (C) 2003 Elsevier Science Ltd. All rights reserved.
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| 4. |
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| 5. |
- Maximov, Ivan, et al.
(author)
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Nanoimprint technology for fabrication of three-terminal ballistic junction devices in GaInAs/InP
- 2003
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In: Microelectronic Engineering. - 1873-5568. ; 67-8, s. 196-202
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Journal article (peer-reviewed)abstract
- We present processing technology based on nanoimprint lithography (NIL) and wet etching for fabrication of GaInAs/InP three-terminal ballistic junction (TBJ) devices. To transfer sub-100 nm features into a high-mobility InP-based 2DEG material, we used SiO2/Si stamps made with electron beam lithography and reactive ion etching. After the NIL, the resist residues are removed in oxygen plasma followed by wet etching of GaInAs/InP to define the M-structures. Fabricated TBJ-devices are characterized using scanning electron microscopy and electron transport measurements. Highly non-linear electrical characteristics of the TBJ structures are demonstrated and compared with E-beam defined devices. (C) 2003 Elsevier Science B.V. All rights reserved.
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| 6. |
- Mårtensson, Lena, et al.
(author)
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Subcutaneous versus intracutaneous injections of sterile water for labour analgesia : a comparison of perceived pain during administration
- 2000
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In: British Journal of Obstetrics and Gynecology. - : Wiley-Blackwell. - 1470-0328 .- 1471-0528. ; 107:10, s. 1248-1251
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Journal article (peer-reviewed)abstract
- Objective To investigate whether, during injections of sterile water, there is any difference in perceived pain between intracutaneous and subcutaneous injections.Design Blind controlled trial with cross-over design.Setting Göteborg and Skövde, Sweden.Participants One hundred healthy female volunteers.Methods The women were randomised into two groups and subjected to two trials, within one week of each other. During the first trial one group ( n= 50 ) received the intracutaneous injection first, followed by the subcutaneous injection. The second group ( n= 50 ) was given the subcutaneous injection first, followed by intracutaneous injection. In both groups all the injections were given in reverse order during the second trial.Main outcome measures Experienced pain during the administration of sterile water injections, measured by visual analogue scale.Results The analysis showed intracutaneous injections to be significantly more painful than subcutaneous injections, even after adjusting for injection day and for left/right site of injection (mean 60.8 vs 41.3, P < 0.001 ).Conclusions The findings suggest that the less painful subcutaneous injection technique should be used.
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| 7. |
- Wallin-Ashcroft, Anna-Lena, 1943-
(author)
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Great men and charming creatures : on male and female terms in eighteenth century novels
- 2000
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Doctoral thesis (other academic/artistic)abstract
- A corpus of terms for human beings collected from 18th century novels is studied from a broad sociolinguistic perspective. A summary of recent linguistic theories and a survey of 18th century culture and society are provided as background.The basic assumption is that the meaning of words is dependent on human beings and their society and that shifts in meaning are linked to changes in attitudes, culture and social structure. Terms used for men and women therefore mirror the concepts of 'male' and 'female' in a society.Gender differences found in various semantic fields are presented and discussed. Prototypes for certain terms are suggested by means of frame analysis. Sense developments are traced and related to societal changes. Differences in male and female usage are discussed.The findings are analyzed in terms of the following contrasts within the concepts of 'male' and 'female': spirit/matter; power/dependency; active/passive; varied/limited.
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| 8. |
- Wallin, Lena, et al.
(author)
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Follow-up of acute pyelonephritis in children by Tc-99m DMSA scintigraphy - Quantitative and qualitative assessment
- 2001
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In: Clinical Nuclear Medicine. - 0363-9762. ; 26:5, s. 423-432
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Journal article (peer-reviewed)abstract
- Purpose: The author's goal was to create a system to identify children at risk for development of progressive renal damage, Methods: Thirty-four children were examined with Tc-99m DMSA scintigraphy in the acute stage of an initial episode of pyelonephritis, after 6 months, and again after 1 year, The scintigraphic findings were correlated with clinical and laboratory data, Results: All children had parenchymal defects in the acute stage: 93% of the kidneys and 85% bilaterally, After 6 months, the defects had diminished or disappeared in 66% of the kidneys, New defects appeared in 22%, At 1 year, no further improvement was seen in the kidneys, with an improved or unchanged pattern at 6 months, New defects appeared in 34%, Mean kidney activity uptake expressed as the percentage of administered dose (KU/AD), was low in the acute stage, increased at 6 months, with no further significant increase at 1 year, Eighty-three percent of children with urine cultures growing greater than or equal to 10(4) bacteria/ml at follow-up had decreased KU/AD values, whereas all children with urine cultures growing < 10(4) bacteria/ml had increased KU/AD values. Conclusions: Quantitative assessment increases the sensitivity of Tc-99m DMSA scintigraphy. Follow-up with this method makes it possible to identify the children with decreasing renal tubular function who may be at risk for progressive renal damage, Moderate bacteria of 104 bacteria/ml urine is associated with deterioration of renal tubular function.
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