| 1. |
- Lundgren, T, et al.
(författare)
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Saliva composition in children and young adults with Papillon-Lefèvre syndrome
- 1996
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Ingår i: Journal of Clinical Periodontology. - : Wiley. - 0303-6979 .- 1600-051X. ; 23:12, s. 1068-72
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Tidskriftsartikel (refereegranskat)abstract
- The aim of the present study was to evaluate the salivary secretion rate and composition in a group of 16 children and young adults (6-27 years) with Papillon-Lefèvre Syndrome (PLS), and to compare the findings with a group (n = 16) of healthy controls. Unstimulated and stimulated whole saliva was collected at least 2 h after meals and the secretion rate determined. The stimulated saliva was assessed for buffer capacity, total protein, peroxidase and hexosamine, while the unstimulated samples were evaluated for total protein, lysozyme, thiocyanate, lactoferrin and salivary IgA. Both the unstimulated (p < 0.01) and stimulated (p < 0.05) saliva secretion rates were significantly lower among the PLS patients compared with the controls. Furthermore salivary buffer capacity was significantly (p < 0.01) lower in the PLS patients. The total protein content in saliva was comparatively high in the study group, while the concentrations of immunoglobulins and non-immunoglobulins were within normal ranges. When calculating the output of the assessed antimicrobial factors, the mean peroxidase level in stimulated whole saliva was found to be significantly (p < 0.01) lower in the PLS patients than in the healthy controls. In conclusion, the present study indicates an impaired water secretion and a somewhat altered saliva gland function in children and young adults with PLS.
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| 2. |
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| 3. |
- Danilov, Roman, et al.
(författare)
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Influence of waste water from the paper industry and UV-B radiation on the photosynthetic efficiency of Euglena gracilis
- 1999
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Ingår i: Journal of Applied Phycology. - 0921-8971 .- 1573-5176. ; 11, s. 157-163
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Tidskriftsartikel (refereegranskat)abstract
- The green flagellate Euglena gracilis has been used as a model organism to elucidate the possible large-scale and short-term effects of waste substances from the pulp and paper industry on photosynthetic efficiency (PE). Different concentrations of waste substances before and after treatment in a cleaning system were studied. The uncleaned sample at concentrations up to 1:10 and the cleaned sample at concentrations up to 1:5 showed stimulating effects on the PE after 7 days of incubation compared to the control. The effects of waste substances on the PE of E. gracilis were also studied in combination with short-term studies (20 and 40 min) of ultraviolet-B radiation (UV-B, 280–320 nm). It was shown that increasing concentrations of the uncleaned sample had continuously stimulating effects on the PE and worked protectively against UV-B radiation. The cleaned sample exhibited no effects, or negative effects, on the PE of E. gracilis together with UV-B radiation compared to the experiments with only UV-B radiation. At the concentration 1:1 of the cleaned sample an increase in the PE was detected due to the high concentration of the coloured substances and a decrease in the UV-B penetration. PE revealed itself to be highly sensitive for detecting toxic effects on E. gracilis and is thus very promising for use in regular toxicity tests of waste water from pulp and paper industry.
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| 4. |
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| 5. |
- Ekelund, Nils, 1956-
(författare)
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Effects of protein synthesis inhibitors on photoinhibition by UV–B (280-320 nm) radiation in the flagellate Euglena gracilis
- 1996
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Ingår i: Scienta Marina. ; 60:1, s. 95-100
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Tidskriftsartikel (refereegranskat)abstract
- Irradiation of the flagellate Euglena gracilis by UV-B radiation resulted in inhibition of photosynthesis and motility. After 2 h of UV-B radiation (1.2 W m super(-2)) the rates of photosynthesis did not completely recover until after 24 h in visible light. After 24 h in darkness the rate of photosynthesis was lower but the recovery time in darkness after UV-B radiation was about the same as in the visible light. In the presence of lincomycin, inhibitor of chloroplast protein synthesis, therecovery of photoinhibition was totally blocked for up to 16 h recovery in visible light. However, after 24 h recovery in visible light together with lincomycin, photosynthesis was partially recovered but recovery in darkness together with lincomycindid not give any reparation at all of photosynthesis. The inhibition of motility had a slower recovery phase and had not fully recovered even after 72 h in visible light.
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| 6. |
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| 7. |
- Johansson, Gunvi, et al.
(författare)
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Young adults' views on dental care : a qualitative analysis
- 1996
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Ingår i: Scandinavian Journal of Caring Sciences. - : Blackwell Publishing. - 0283-9318 .- 1471-6712. ; 10:4, s. 197-204
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Tidskriftsartikel (refereegranskat)abstract
- The aim of the present study was to determine young adults' views on dental care. The gathered data were gleaned from interviews and analysed in accordance with comparative method. It was possible to discern the views from two perspectives: the patients' opinions regarding costs in relation to given functions within dental care, and the attitudes to given functions in dental care per se. Costs for information and service were deemed questionable, whereas the costs for examination and treatment were accepted. The patients' stance was active with respect to information and treatment, whereas a greater degree of passivity prevailed within the areas of examination and service. According to this report, maintaining cheap dental care rates was deemed important. The patients questioned having to pay for information perceived as irrelevant to dental care. They expressed a hidden wish to assume an active role while being given more information, and to exercise greater influence with reference to own dental care, but were not in the habit of stating their views to dental staff. Thus, continuous patient satisfaction studies are vital in order to meet this group's needs. One suggestion for further research is to study how young adults regard dental care based on the theory presented.
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| 8. |
- Nielsen, Tom, 1956-, et al.
(författare)
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Impact of natural and artificial ultraviolet-B radiation on motility and growth rate of marine dinoflagellates
- 1995
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Ingår i: Journal of Photochemistry and Photobiology. B. - 1011-1344 .- 1873-2682. ; 27, s. 73-79
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Tidskriftsartikel (refereegranskat)abstract
- The growth rates and motility of dinoflagellates were studied in the field in the presence or absence of UVB radiation, as well as in the laboratory under artificial radiation conditions. Photosynthetically active radiation (PAR, 400–700 nm) and UVB radiation showed large variations due to cloud cover and seasonal changes in natural daylight. In Swedish coastal water, UVB radiation was attenuated to about 10% of surface irradiance at a depth of 120 cm. There was no significant difference in the motility of two strains of Prorocentrum minimum (Atlantic, LAC4LI; Kattegat, LAC6KA83) kept in the water at different depths (35 and 120 cm) for 4 h, with or without natural solar UV radiation, except for a day with high UVB irradiance (1.2 W m−2), which decreased the motility at a depth of 35 cm for the two species). Simulated in situ experiments with 2 h natural daylight, with and without natural UV radiation (UVB, 1.6 W m−2), had a dramatic effect on the motility of Gyrodinium aureolum. Artificial UVB radiation from UV lamps (4 h, 2.72 kJ m−2 day−1, biologically effective UVB radiation, UVBBE) in the laboratory decreased the motility of Heterocapsa triquetra (LAC20) by 56% and the two strains of P. minimum (Atlantic, LAC4LI; Kattegat, LAC6KA83) by 43% and 36% respectively; the growth was inhibited for all species, as well as for Amphidinium carterae (LAC1KA83), when organisms were exposed to more than 0.7 kJ m−2 day−1 of UVBBE radiation.
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| 9. |
- Nygård, Charlotta, et al.
(författare)
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Effects of lead (PbCl2) on photosynthesis and respiration of the bladderwrack, Fucus vesiculosus, in relation to different salinities.
- 1999
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Ingår i: Water, Air and Soil Pollution. - 0049-6979 .- 1573-2932. ; 116:3-4, s. 549-565
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Tidskriftsartikel (refereegranskat)abstract
- The photosynthetic and respiratoric capacity of Fucus vesiculosus grown at three different levels of salinity (4.5, 8 and 20‰) was studied in the presence of different concentrations of lead (5, 10, 15, 20, 25, and 30 mg PbCl2 L-1). The studies were performed by using a light-pipette, which has a precisely defined light source of photosynthetic active radiation (PAR, 400-700 nm). The photosynthetic and respiratoric capacity of the algae were measured when exposed to light pulses with increasing irradiance and after 24 hr in seawater with the addition of lead. The results indicate that the photosynthetic capacity of F. visiculosus from 20‰ is more sensitive to lead compared to those from 8 and 4.5‰. The photosynthetic capacity was reduced by 69% at 30 mg PbCl2 L-1 compared to the control alga. The photosynthetic capacity of F vesiculosus from 8 and 4.5‰ was reduced by 38 and 15%. The respiratoric capacity of F. vesiculosus from 20‰ was reduced by 41% at 30 mg PbCl2 L-1. However, the respiratoric capacity of the algae from 4.5‰ increased by 55% at the same concentration of PbCl2. The results indicate that lead showed inhibitory effects on photosynthesis but a stimulatory effect on respiration of F versiculosus grown at low levels of salinity.
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