Current issue: 53(3)

Under compilation: 53(4)

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Silva Fennica 1926-1997
1990-1997
1980-1989
1970-1979
1960-1969
Acta Forestalia Fennica
1953-1968
1933-1952
1913-1932

Articles by Tapio Klen

Category: Article

article id 5272, category Article
Alli Manninen, Pentti Heikkinen, Kaj Husman, Juhani Kangas, Tapio Klen, Ilkka Mononen. (1986). Klooratuille fenoksihapoille altistumisen vaikutus metsurin terveydentilaan vesakontorjuntatyössä. Silva Fennica vol. 20 no. 3 article id 5272. https://doi.org/10.14214/sf.a15451
English title: Effect of exposure to chlorinated phenoxy acid herbicides on the health of Finnish forest workers in silvicultural clearing work.

Exposure to phenoxy acids and their effect on worker’s health were studied among 35 exposed forest workers. The control group was 47 non-exposed loggers. The both groups were medically examined before and after their working period including such laboratory analyses as B-differential count, B-thrombocytes. In addition, the exposure to eight ULV sprayers and two clearing saw sprayers were measured in breathing zone.

The mean of phenoxy acid concentrations in urine among all the exposed workers after the working period was 6.5 μmol/l being significantly below the hygienic limit value (14 μmol/l). The mean concentrations of ULV sprayer workers was 7.3 μmol/l and of clearing saw sprayer workers 2.7 μmol/l. The mean of air concentrations among ULV sprayers was 0.23 mg/m3 and among clearing saw sprayers 0.06 mg/m3. No statistically significant differences were noticed in the hematologic parameters and in the enzyme activities of the liver, kidney and muscles between the exposed and control groups before or after the working period. So, it seems that these low exposure levels don’t cause sudden changes in health.

The PDF includes an abstract in English.

  • Manninen, ORCID ID:E-mail:
  • Heikkinen, ORCID ID:E-mail:
  • Husman, ORCID ID:E-mail:
  • Kangas, ORCID ID:E-mail:
  • Klen, ORCID ID:E-mail:
  • Mononen, ORCID ID:E-mail:
article id 5164, category Article
Juhani Kangas, Tapio Klen. (1982). Raivaussahan kantokäsittelylaitteen käyttäjän altistuminen torjunta-aineille. Silva Fennica vol. 16 no. 3 article id 5164. https://doi.org/10.14214/sf.a15079
English title: Exposure of forest workers to herbicides.

The purpose of this study was to measure workers’ exposure to MCPA and glyphosate when sprayers connected to the brush saws was used. A non-pressurized sprayer with a pump and a pressurized sprayer where dosage was regulated with manual control were studied. Exposure was measured from the breathing zone and urine samples.

MCPA collected from the breathing zone gathered into alcohol was 0.05 mg/m3 for the pressurized sprayer, 0.02 mg/m3 for the non-pressurized sprayer, and 0.04 mg/m3 (average) for both types of sprayers together.

MCPA in the breathing zone, collected from splashes and fog into a glass fibre filter, was 0.18 mg/m3 for the pressurized sprayer, 0.09 mg/m3 for the non-pressurized sprayer, and 0.12 mg/m3 for both sprayers used together. Glyphosate in the breathing zone, collected into sodium hydroxide was below 0.05 mg/m3.

In five urine samples taken after the work day there was on the average 0.4 mg/l MCPA, while in 21 samples the MCPA contents were under the definition limit (0.2 mg/l).

The PDF includes a summary in Finnish.

  • Kangas, ORCID ID:E-mail:
  • Klen, ORCID ID:E-mail:
article id 4999, category Article
Tapio Klen, Veikko Louhevaara. (1978). Metsurin suojavarusteiden aiheuttama lisäkuormitus. Silva Fennica vol. 12 no. 3 article id 4999. https://doi.org/10.14214/sf.a14853
English title: The additional physical strain caused by safety equipment in logging work.

The safety clothing, rubber safety boots, belt with lifting hooks and personal protectors can weight about 3 kg more than the normal work clothing including rubber boots. In order to evaluate the increase off the physical strain in logging work due to them, laboratory tests performed on tread mill were made. The physical strain increased 3–11% as estimated from heart rate and 4–8% as estimated from oxygen consumption measurements.

The PDF includes a summary in English.

  • Klen, ORCID ID:E-mail:
  • Louhevaara, ORCID ID:E-mail:

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