Growth characteristics of the endangered thick‐shelled river mussel (Unio crassus) near the northern limit of its natural range          下载免费PDF全文

Samuli Helama  Ilmari Valovirta  Jan Kresten Nielsen 《水产资源保护:海洋与淡水生态系统》2017,27(2):476-491

Food choices and health during military service: increases in sugar- and fibre-containing foods and changes in anthropometric and clinical risk factors     

Bingham CM  Lahti-Koski M  Absetz P  Puukka P  Kinnunen M  Pihlajamäki H  Sahi T  Uutela A  Jallinoja P 《Public health nutrition》2012,15(7):1248-1255

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Cupping of wooden cladding boards in cyclic conditions—a study of boards made of Norway spruce (Picea abies) and Scots pine sapwood (Pinus sylvestris)     

Jari Virta  Simo Koponen  Ilmari Absetz 《Wood Science and Technology》2005,39(6):431-438

The aim of the study was to examine how the thickness and species of softwood influence cupping during cyclic conditions. The study was conducted with full-scale test walls in laboratory conditions. On the basis of the results, the thickness and species of softwood both have a significant influence on cupping of the cladding board. The boards made of Norway spruce were considerably more resistant to cupping than those made of Scots pine sapwood. Boards made of Scots pine sapwood were more likely to remain curved after each drying period. It appears probable that the cupping sensitivity of Scots pine sapwood affects the durability of the cladding, e.g., causing cracking formation on the surface and peeling of the coating. From the curving results, it is possible to estimate surface elongation and durability of the wood surface and of the coating in cyclic conditions.  相似文献   

Effect of pulp and paper mill effluent (BKME) on physiological parameters of roach (Rutilus rutilus) infected by the digenean Rhipidocotyle fennica     

Jeney Z  Valtonen ET  Jeney G  Jokinen EI 《Folia parasitologica》2002,49(2):103-108

Physiological parameters were measured after experimental infection of roach (Rutilus rutilus L.) with Rhipidocotyle fennica Gibson, Valtonen et Taskinen, 1992 (Digenea) cercariae. The fish were caught from two lakes: a eutrophic bleached kraft mill effluent (BKME)-contaminated lake and an oligotrophic unpolluted lake. The intensity of infection was followed up to 10 days post infection (p.i.) and physiological parameters indicating non-specific stress responses and the condition of fish were examined simultaneously. The mean abundance, the number of parasites per fish, of R. fennica was significantly higher in the fish from the contaminated water during the first two days p.i., probably reflecting the decreased resistance of these fish to infection. The decrease of leukocrit, as well as the increase of the activity of transaminases (GOT and GPT) in infected fish of both groups are suggestive of pathological processes caused by cercariae penetrating the fish. A significantly lower leukocrit value, as well as higher alkaline phosphatase activity and plasma chloride levels were noted in fish originating from the contaminated lake compared to those from the unpolluted lake. No significant differences were noted in haematocrit, plasma protein and calcium values between the fish from the uncontaminated and contaminated lakes, or between the infected and uninfected control fish.  相似文献