Results 121 to 130 of about 21,286 (231)

Hygroscopic properties of water-soluble matter and humic-like organics in atmospheric fine aerosol [PDF]

open access: yesAtmospheric Chemistry and Physics, 2004
Ambient continental-rural fine aerosol (K-puszta, Hungary, PM1.5) was sampled on quartz fibre filters in winter and summer 2001. Water-soluble matter (WSM) was extracted in MilliQ-water, and, in a second step, solid phase extraction was used to ...
M. Gysel   +6 more
doaj  

\u3csup\u3e13\u3c/sup\u3eC NMR Analysis of Biologically Produced Pyrene Residues by \u3cem\u3eMycobacterium\u3c/em\u3e sp. KMS in the Presence of Humic Acid [PDF]

open access: yes, 2007
Cultures of the pyrene degrading Mycobacterium sp. KMS were incubated with [4-13C]pyrene or [4,5,9,10-14C]pyrene with and without a soil humic acid standard to characterize the chemical nature of the produced residues and evaluate the potential for ...
Holz, Richard C.   +2 more
core   +1 more source

Photoreductive Dissolution of Iron Oxides Trapped in Ice and Its Environmental Implications [PDF]

open access: yes, 2010
The availability of iron has been thought to be a main limiting factor for the productivity of phytoplankton and related with the uptake of atmospheric CO_2 and algal blooms in fresh and sea waters. In this work, the formation of bioavailable iron (Fe(II)
Choi, Wonyong   +4 more
core   +1 more source

Spectroscopic characterization of humic and fulvic acids in soil aggregates, Brazil. [PDF]

open access: yesHeliyon, 2020
Machado W   +3 more
europepmc   +1 more source

Effects of Forest Fires on the Organic Matter of Soils in Plana аnd Ihtimanska Sredna Gora Mountains

open access: yesПочвознание, агрохимия и екология, 2011
This study deals with the effects of forest fires on the soil organic matter (SOM) аnd the quantity of Humic acids (НА) and Fulvic acids (FA). The function of fire type (surface or crown), dominant tree species and soil characteristics are also studied ...
Emiliya Velizarova, Ekaterina Filcheva
doaj  

Studies of semiquinone free radicals by ESR in the whole soil, HA, FA and humin substances

open access: yesJournal of the Brazilian Chemical Society, 2004
In this work it was studied soil organic matter from a gley soil, using ESR (electron spin resonance spectroscopy). The studied soil samples were collected in Rio de Janeiro, Brazil.
Saab Sérgio C, Martin-Neto Ladislau
doaj  

Radiocaesium in the fungal compartment of forest ecosystems [PDF]

open access: yes, 2003
Fungi in forest ecosystems are major contributors to accumulation and cycling of radionuclides, especially radiocaesium. However, relatively little is known about uptake and retention of 137Cs by fungal mycelia.
Vinichuk, Mykhaylo
core  

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