Track topics on Twitter Track topics that are important to you
U, Pu and Pu are present in soils mainly as a result of the local- and global-fallout from the atmospheric nuclear weapons tests carried out mainly in the 1950's and 1960's. In this work we provide new data on the presence of U and Pu in surface soils (i.e. up to 5 cm depth) from Chile and Africa. The results were obtained by low-energy Accelerator Mass Spectrometry (AMS). In the case of the Chilean samples, U/Pu atom ratios show a high variability and are in general higher than the reported value for the global fallout in the Northern Hemisphere, ranging from 0.2 to 1.5. The U atomic concentrations range from 3.5 × 10 to 9.1 × 10 atoms/g, and are at least two orders of magnitude lower than the reported values in the Northern Hemisphere. The measured Pu/Pu atom ratio in soils from South-Africa and Mozambique are of about 0.17, in agreement with the expected one for global-fallout at those coordinates. To best knowledge of the authors the present work is the first publication on U concentrations and U/Pu atom ratios in soils from South-America and Africa.
This article was published in the following journal.
Name: Journal of environmental radioactivity
Seabirds and pinnipeds play an important role in biogeochemical cycling by transferring nutrients from aquatic to terrestrial environments. Indeed, soils rich in animal depositions have generally high...
The aim of this study was to determine the mobilization capability of Ni, Co, and Mn contained in New Caledonian ultramafic soils. Two series of soils were sampled: bare-surface mining soils in a Ni-m...
6:2 chlorinated polyfluorinated ether sulfonate (trade name F-53B), a perfluorooctane sulfonate alternative used as a mist suppressant in the chromium plating industry, is environmentally persistent a...
An integrated geochemical and microbiological investigation of soils from the Solfatara Crater (Campi Flegrei, southern Italy) demonstrated that interstitial soil gases dominated by CO2 and other typi...
The structure of the male terminalia and their musculature of species of tanyderid genera Alexander, 1929 from Chile and Alexander, 1927 from Tasmania are examined and compared with each other and w...
The aim of the study was to assess the immunogenicity and safety of Fluzone Quadrivalent influenza vaccine Southern Hemisphere (SH) 2015 formulation in participants aged 18 to 60 years as ...
This study will compare the effectiveness of different polarities of transcranial direct current stimulation paired with intensive motor training in recovery of upper extremity function in...
When a certain area of the brain is injured, like in stroke, several events occur. One side of the body may become weak. This weakness is called hemiparesis and it may create difficulty in...
This study evaluates the immunogenicity, safety and tolerability of an H5N1 vaccine with a seasonal trivalent influenza vaccine, containing the strains recommended by WHO for the 2007 infl...
This is a Phase 2, randomized, double-blind study in which motavizumab (MEDI-524) and palivizumab will be administered to high-risk children during the same respiratory syncytial virus (RS...
The southern continent of the Western Hemisphere, extending southward from the Colombia-Panama border.
The sole family in the order Sphenisciformes, comprised of 17 species of penguins in six genera. They are flightless seabirds of the Southern Hemisphere, highly adapted for marine life.
A genus of HALOBACTERIACEAE distinguished from other genera in the family by the presence of specific derivatives of TGD-2 polar lipids. Haloarcula are found in neutral saline environments such as salt lakes, marine salterns, and saline soils.
Loss of the power to comprehend written materials despite preservation of the ability to write (i.e., alexia without agraphia). This condition is generally attributed to lesions that "disconnect" the visual cortex of the non-dominant hemisphere from language centers in the dominant hemisphere. This may occur when a dominant visual cortex injury is combined with underlying white matter lesions that involve crossing fibers from the occipital lobe of the opposite hemisphere. (From Adams et al., Principles of Neurology, 6th ed, p483)
A republic in southern Africa, east of ZAMBIA and BOTSWANA and west of MOZAMBIQUE. Its capital is Harare. It was formerly called Rhodesia and Southern Rhodesia.
Collaborations in biotechnology
Commercial and academic collaborations are used throughout the biotechnology and pharmaceutical sector to enhance research and product development. Collaborations can take the form of research and evaluation agreements, licensing, partnerships etc. ...