| 1. |
- Juutinen, S, et al.
(author)
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Band structures in Ba-132
- 1995
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In: PHYSICAL REVIEW C-NUCLEAR PHYSICS. - : AMER INST PHYSICS. ; 52:6, s. 2946-2954
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Journal article (other academic/artistic)abstract
- Excited states of Ba-132 were studied in an experiment utilizing the Sn-124(C-13,5n) reaction at a beam energy of 65.5 MeV. The level scheme of Ba-132 was considerably extended from what was previously known. Evidence is presented for neutron h(11/2) alig
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| 2. |
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| 3. |
- Markkola, A M, et al.
(author)
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Scots pine responses to CO2 enrichment--I. Ectomycorrhizal fungi and soil fauna.
- 1996
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In: Environmental Pollution. - : Elsevier. - 0269-7491 .- 1873-6424. ; 94:3, s. 309-16
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Journal article (peer-reviewed)abstract
- Ectomycorrhizal Scots pine seedlings were grown in unfertilized forest soil at ambient and double (ca 700 ppm) atmospheric concentrations of CO2. The biomass of seedlings and fungal biomass both in the roots and in the soil and the numbers of certain groups of soil animals were measured under summer conditions and after an artificial winter acclimation period. No biomass parameter showed any significant change due to CO2 elevation. Increases were found during the winter acclimation period in total and fine root biomasses, fungal biomass in the soil and total fungal biomass both in the roots and in the soil, while the ratio of needle biomass: fungal biomass and the shoot: root ratio decreased. The N concentration in previous-year needles was lower in the double CO2 environment than with ambient CO2. Enchytraeids almost disappeared in the double CO2 environment during winter acclimation, while the numbers of nematodes increased at the same time in both treatments.
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| 4. |
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| 5. |
- Markkola, A.M., et al.
(author)
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Estimates of fungal biomass in Scots pine stands on an urban pollution gradient
- 1995
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In: New Phytologist. - : Wiley. - 0028-646X .- 1469-8137. ; 131:1, s. 139-147
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Journal article (peer-reviewed)abstract
- Biomasses of ectomycorrhizal and saprotrophic fungal communities partitioned into sporophores and non‐reproductive structures were estimated in mature Scots pine (Pinus sylvestris L.) stands along an urban nitrogen and sulphur pollution gradient in northern Finland. The average total biomass of fungi varied in the four pollution zones from 14.6 to 20.2 g d. Wt kg−1 soil d. wt and from 73.3 to 108.0 g d. Wt m−2, the mycelia of both mycorrhizai and saprotrophic fungi in the soil comprising 72–80% of the total. The annual carbon allocation to the fungal communities was calculated to vary between 9 and 26% of the estimated annual carbon assimilation at the Scots pine sites. The size of the mean fungal biomass fractions decreased in the following sequence: mycelia in the soil > fungal biomass in fine roots estimated in terms of chitin > sclerotia > fungal biomass in fine roots estimated in terms of ergosterol > sporopbores of mycorrhizal fungi > sporophores of saprotrophie fungi. A positive correlation was obtained between the number of Scots pine mycorrhiza and the average sporophore yield of mvcorrhiaal fungi for three successive years. Tbe sporophore biomass of the mycorrhizal fungi was smaller at the most polluted than at the least polluted sites. The total fungal biomass allocation was not affected by urban pollution.
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