Results 61 to 70 of about 576,877 (314)

A geostatistical analysis of the spatial variation of soil mineral nitrogen and potentially available nitrogen within an arable field.

, 2003
The technology for site-specific applications of nitrogen (N) fertilizer has exposed a gap in our knowledge about the spatial variation of soil mineral N, and that which will become available during the growing season within arable fields. Spring mineral
Baxter, S. J., Baxter, S.J., Oliver, M.A., Gaunt, J., Gaunt, J. L., Oliver, M. A.   +5 more
core   +1 more source

Serological evidence of discrete spatial clusters of Plasmodium falciparum parasites. [PDF]

, 2011
BACKGROUND: Malaria transmission may be considered to be homogenous with well-mixed parasite populations (as in the classic Ross/Macdonald models).
Cham, G, Olotu Ally, Bull, PC, Theander, TG, Bejon, P, Chris J. Drakeley, Savarese, B, Cham, Gerald, Lievens Marc, Lorenz von Seidlein, Gerald Cham, Thor G. Theander, Lavstsen, T, Barbara Savarese, Bejon, Philip, John Lusingu, Marsh Kevin, von Seidlein, L, Bull Peter C., Olotu, Ally, von Seidlein Lorenz, Lusingu, J, von Seidlein, Lorenz, Lusingu, John, Theander Thor G., Chris J Drakeley, Thor G Theander, Lavstsen Thomas, Drakeley, Chris J, Vekemans Johan, Savarese Barbara, Cham Gerald, Kevin Marsh, Drakeley, CJ, Thomas Lavstsen, Lievens, M, Bull, Peter, Peter C. Bull, Turner, L, Marc Lievens, Vekemans, J, Vekemans, Johan, Philip Bejon, Theander, Thor G, Savarese, Barbara, Marsh, K, Louise Turner, Lusingu John, Peter C Bull, Bejon Philip, Drakeley Chris J., Lievens, Marc, Lavstsen, Thomas, Ally Olotu, Marsh, Kevin, Olotu, A, Turner Louise, Johan Vekemans, Turner, Louise, Bull, Peter C   +59 more
core   +1 more source

Characterizing light leakage and spatial variation of illuminance in commercial broiler houses during tunnel ventilation1

Journal of Applied Poultry Research, 2020
Summary: Providing a suitable lighting environment for commercial poultry is essential for physiological processes, ensuring welfare, and achieving production goals.
John Linhoss, Joseph Purswell, Wes Lowe, Daniel Chesser   +3 more
doaj   +1 more source

Spatial variation of technical efficiency of cereal production in China at the farm level

Journal of Integrative Agriculture, 2021
Rice, wheat and maize are the main staple food crops to ensure the food security in China with diversified climate condition, cropping system and environmental and socio-economic factors across provinces.
Wen-bin ZHOU, Huai-yu WANG, Xi HU, Feng-ying DUAN   +3 more
doaj   +1 more source

Spatial variation in cartilage T2 of the knee [PDF]

Journal of Magnetic Resonance Imaging, 2001
AbstractTechnical limitations imposed by resolution and B1 homogeneity have thus far limited quantitative in vivo T2 mapping of cartilage to the patella. The purpose of this study is to develop T2 mapping of the femoral/tibial joint and assess regional variability of cartilage T2 in the knee. Quantitative in vivo T2 mapping of the knee was performed on
H E, Smith, T J, Mosher, B J, Dardzinski, B G, Collins, C M, Collins, Q X, Yang, V J, Schmithorst, M B, Smith   +7 more
openaire   +2 more sources

The ubiquitin‐proteasome system and autophagy as guardians of the cellular proteome

FEBS Letters, EarlyView.
This Perspective covers the three principles governing the crosstalk between the ubiquitin‐proteasome system and autophagy in cellular proteostasis: (1) a shared ubiquitin code routing substrates via shuttle factors or autophagy receptors; (2) spatial compartmentalization into phase‐separated degradation hubs and organelle‐specific modules (exemplified
Ivan Dikic
wiley   +1 more source

Spatial variation in burrow entrance density of the sooty shearwater (Puffinus griseus)

, 2014
The effects of a range of habitat variables on spatial variation of breeding burrow density of sooty shearwaters, Puffinus griseus, were measured on 5 islands near Rakiura (Stewart Is) and 1 island in The Snares Is group, during the 2000-01 breeding ...
Knight, Ben, Charleton, Kristin, Moller, Henrik, Newman, Jamie, Scott, Darren, Bragg, Corey, Fletcher, David   +6 more
core   +1 more source

An unexpected alternative viologen electron mediator site in tungsten‐containing formate dehydrogenase

FEBS Letters, EarlyView.
An unexpected alternative interaction site for ethyl viologen was identified in formate dehydrogenase 1 from Methylorubrum extorquens. Combined mutagenesis, kinetic analysis, and docking revealed that aromatic residues near an iron–sulfur cluster enable flavin mononucleotide‐independent electron transfer, offering a framework for engineering improved ...
Eleni G. Poloniataki, Yong Hwan Kim
wiley   +1 more source

The Migration of the Warming Center and Urban Heat Island Effect in Shanghai During Urbanization

Frontiers in Earth Science, 2020
Based on the monthly air temperature data from 11 national meteorological stations of Shanghai, the construction land areas derived from the Landsat Thematic Mapper (TM) data and population density data, the migration of urban warming centers in ...
Zhongping Shen, Zhongping Shen, Jun Shi, Jun Shi, Jianguo Tan, Jianguo Tan, Hanwei Yang, Hanwei Yang   +7 more
doaj   +1 more source

Cell geometry and membrane protein crowding constrain Escherichia coli growth rate, overflow metabolism, respiration, and maintenance energy

FEBS Letters, EarlyView.
The physical dimensions and shape of bacterial cells define the surface area available to acquire nutrients and the volume available for synthesizing proteins and DNA. Here, we use computational systems biology to decode the importance of cell geometry as a major determinant of prokaryotic phenotype, including growth rate and metabolic efficiency. This
Ross P. Carlson, Tomáš Gedeon, Mauricio Garcia Benitez, Campbell Putnam, William R. Harcombe, Radhakrishnan Mahadevan, Ashley E. Beck   +6 more
wiley   +1 more source