Results 51 to 60 of about 487,533 (193)
Agricultural & Environmental LettersAbstractManagement of phosphorus (P) inputs to agroecosystems is often evaluated by phosphorus use efficiency (PUE), but different calculation approaches may yield discrepancies in estimated PUE values. We evaluated PUE (i) indirectly calculated by difference in crop P uptake between a P‐fertilized versus a P‐unfertilized control (PUEdiff) and (ii ...
Andrew J. Margenot +2 more
openaire +2 more sources
Freshwater Biology, Volume 70, Issue 10, October 2025.ABSTRACT Nutrient loading, aquatic invasive species, and climate warming have altered food web dynamics in the Great Lakes. Long‐term data are required to characterise the response of the lower food web to multiple environmental drivers and develop trophic indicators for future research and management efforts.
Isaac Armstrong, Brian F. Cumming
wiley +1 more source
A Comparison Analysis between the Standards Used in the Dneiper River Basin Clean-up and European Union Legislation [PDF]
, 2005 A recent case study involved the clean-up efforts of the Dnieper River Basin by three countries, Belarus, Russia, and Ukraine. The objective of the study was to provide a method for the identification, assessment, and prioritization of the most ...
Naumoff-Dulski, Hannah H.
core +1 more source
Advanced NanoBiomed Research, Volume 5, Issue 9, September 2025.A new ethoxyethanol derivative of iminofullerene, F2, is synthesized and labeled with 99mTc to produce 99mTc‐F2. In vitro, compound F2 inhibits the activation of primary mouse bone marrow‐derived macrophages stimulated with lipopolysaccharide. Moreover, 99mTc‐F2 is selectively enriched in the injured joints of mice. Inflammatory macrophages play a role
Rui He +6 more
wiley +1 more source
Global Biogeochemical Cycles, Volume 39, Issue 8, August 2025.Abstract We report hydrographic and biogeochemical measurements from a meridional transect performed along 150°W, 30°S to 60°S in the Southern Ocean, plus Polar waters to the east. Both of these areas are sites of annual high‐reflectance features in ocean color remote sensing, which were heretofore never confirmed with in situ measurements.
W. M. Balch +9 more
wiley +1 more source
Managing the nutrition of plants and people [PDF]
, 2012 One definition of food security is having sufficient, safe, and nutritious food to meet dietary needs. This paper highlights the role of plant mineral nutrition in food production, delivering of essential mineral elements to the human diet, and ...
Broadley, M. R. +2 more
core +2 more sources
Soil isotopically exchangeable phosphorus : a comparison between E and L values [PDF]
, 1994 This study was designed to explain the apparent discrepancies often reported in the literature between E and L values, two parameters obtained from isotopic exchange experiments and commonly used to quantify available soil phosphate.
Brossard, Michel +3 more
core +1 more source
Clouds, airplanes, trucks and people: carrying radioisotopes to and across Mexico [PDF]
, 2015 The aim of this paper is to describe the early stages of Mexican nuclearization that took place in contact with radioisotopes. This history requires a multilayered narrative with an emphasis in North-South asymmetric relations, and in the value of ...
Mateos, Gisela, Suárez-Díaz, Edna
core +4 more sources
Continued investigation of kinetic aspects of bone mineral metabolism [PDF]
The total body calcium in humans was determined by measuring expired Ar-37 after neutron irradiation. The excretion of Ar-37 from humans was found to be much slower than the excretion from rats and dogs, and to be related to the age of a person.
Palmer, H. E.
core +1 more source
America in space, the first decade - Spacecraft power [PDF]
Spacecraft power supply systems ...
Corliss, W. R.
core +1 more source