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- Andersson, Eva, et al.
(författare)
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Trunk muscle strength in athletes.
- 1988
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Ingår i: Medicine & Science in Sports & Exercise. - 0195-9131 .- 1530-0315. ; 20:6, s. 587-93
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Tidskriftsartikel (refereegranskat)abstract
- Maximal voluntary strength of the trunk muscles was measured in 57 male elite athletes (soccer players, wrestlers, tennis players, and gymnasts), 14 female elite gymnasts, and in a normal group of 87 conscripts. Mean ages in the different groups ranged from 18-22 yr. An isokinetic (constant velocity) technique was used to record maximal torque produced by trunk and hip muscles during flexion, extension, and lateral flexion over the range of motion. The constant angular velocities used were 15 deg.s-1 and 30 deg.s-1, respectively. Isometric strength was measured in a straight body position (0 deg. of flexion). The measurements were made with the subjects in a horizontal position with the pivot point at the hip and at the lumbar (L2-L3) level. All male athlete groups showed higher peak torque values than the normals. The differences were largest in hip extension and trunk flexion. The male gymnasts also showed significantly higher peak values in hip flexion as compared to all other categories. There was no difference in strength per kg body weight between female gymnasts and untrained males, except in trunk extension. The position for peak torque occurred earlier in the movements for the athletes, especially for the gymnasts in extension movements and for the tennis players in flexion movements. In isometric contractions essentially the same strength differences were present as in the slow isokinetic contractions. In lateral flexion wrestlers and tennis players showed significantly higher strength in movements toward the nondominant side. Thus, differences were present between the athletes and the normals, some of which appeared to be sport specific and related to long-term systematic training.(ABSTRACT TRUNCATED AT 250 WORDS)
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- Andersson, Kent, et al.
(författare)
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PAH i småföretag. Mätning av polycykliska aromatiska kolväten i arbetsmiljön.
- 1985
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Arbetstagares exponering för 11 olika polycykliska aromatiska kolväten (PAH) bl.a. bensopyren har undersökts. Huvuddelen av de undersökta komponenterna är cancerogena och mutagena. Mätningarna som är av stickprovskaraktär har utförts inom följande branscher: bilverkstad, bussgarage, gjuterier (2st), grillrestaurang, rökerier (2st), sotning (2st) samt kreosotimpregnering (3st). Provtagningen har skett genom insamling av partiklar på glasfiberfilter. Totalt har 44 prov analyserats mha HPLC-fluorescensteknik. Vid kreosotimpregnering uttogs även prov på PAH i ångfasen. Insamling skedde på en polymer adsorbent, XAD-2. Resultaten visar att halterna av bensopyren genomgående är låga. I 33 av proven understeg halten 50 ng/m3 (1% av nivågränsvärdet).Totalhalten av de 11 st PAH-föreningar som analyserats varierar kraftigt men ligger vanligtvis mellan 30-300 ng/m3. Halter omkring 5000 ng/m3 förekommer. Bensopyren-halten utgör vanligen c:a 1-5 % av totalhalten identifierade PAH. Mätningar av ett 10-tal PAH-komponenter ger en bättre uppfattning och den totala PAH-belastningen i en arbetsmiljö jämfört med mätning av enbart bensopyren eftersom bensopyrens andel av den totala PAH-halten inte är konstant utan varierar stort.
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- Andersson, Rolf G, et al.
(författare)
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Studies of the mechanism of desensitization of anti-IgE-mediated histamine release from human basophils
- 1989
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Ingår i: Agents and actions. - 0065-4299. ; 27:1-2, s. 25-28
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Tidskriftsartikel (refereegranskat)abstract
- Human basophils became hyporesponsive to anti-IgE when exposed to this agent in the absence of Ca2+ for more than 10 min. The desensitization process proceeded in parallel to the releasing-process. The mechanism of desensitization seems to involve a very early step in the release-reaction, since the response to phospholipase A2 and diolein, agents involved in the release-reaction, was not affected by the desensitization.
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| 6. |
- Dagnegård, Eva, et al.
(författare)
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TEVE
- 1984
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- A screen oriented editor is described. The report contains an English summary followed by a detailed description in Swedish.
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