Results 131 to 140 of about 6,670,796 (349)

Eutrophication and the management of planktonic algae: What Vollenweider couldn't tell us [PDF]

, 1992
The ”Vollenweider model” is a sophisticated mathematical statement about the long-range behaviour of (mainly temperate) lakes and their ability to support phytoplankton chlorophyll.
Reynolds, C.S.
core  

Heteroatom‐Engineering Promoted Co9S8 Bi‐functional Electrocatalyst for Hydrazine‐Assisted Hydrogen Production at Industrial Current Density

Advanced Functional Materials, EarlyView.
Fe and P co‐doped Co9S8 nanocorals (Fe, P‐Co9S8) are successfully synthesized by a heteroatom engineering strategy, which exhibit outstanding bifunctional electrocatalytic performance for both the hydrogen evolution reaction (HER) and hydrazine oxidation reaction (HzOR).
Yuying Meng, Chunyan Xiang, Wenbiao Zhang, Dahai Zeng, Bing Du, Bao Zhong, Yue Jiang, Damien Voiry, Qingsheng Gao   +8 more
wiley   +1 more source

Variability in Soil Properties as Influenced by Different Land Use Types in an Ultisols of the Tropical Region, Delta State, Nigeria

Agricultura Tropica et Subtropica, 2014
The study was conducted in the 2010 - 2012 cropping seasons in a typical ultisols of the tropics. The aim was to assess variability in soil properties as influenced by three land use types namely: oil palm plantation, maize and yam cultivated lands.
Egbuchua Collins Nnamdi
doaj   +1 more source

The phytoplankton of an enriched, soft-water lakel subject to intermittent hydraulic flushing (Grasmere, English Lake District) [PDF]

, 1982
This paper describes some characteristic features of the phytoplankton of Grasmere, one of the smaller of the principal lakes of the English Lake District, and attempts to relate these to distinctive physical and chemical properties of the lake ...
Lund, J.W.G., Reynolds, C.S.
core  

The Galactic evolution of phosphorus

, 2011
As a galaxy evolves, its chemical composition changes and the abundance ratios of different elements are powerful probes of the underlying evolutionary processes.
Arnett, Berzinsh, Burbidge, Caffau, Caffau, Castelli, Chen, E. Caffau, Ecuvillon, Fenner, Gehren, Gehren, Gibson, González Hernández, Hall, Hintz, Hubrig, Kobayashi, Kurucz, Lockwood, Ludwig, M. Steffen, Manfroid, Meléndez, Michaud, Molaro, P. Bonifacio, Petit, R. Faraggiana, Ramírez, Rivera, Sbordone, Sbordone, Sbordone, Shi, Sousa, Spite, Struve, Takada-Hidai, Woosley   +39 more
core   +2 more sources

How to Chemically Protect PFAS‐Free Membranes in Fuel Cells: Radical Quenching Poly(vinylphosphonic acid) Layer

Advanced Functional Materials, EarlyView.
Hydrocarbon membranes are a greener alternative to PFSA in PEM fuel cells, but degrade rapidly from radical attack. We present a novel strategy using poly(vinylphosphonic acid) (PVPA) as a local radical scavenger. Incorporated as an interfacial barrier, PVPA enhances chemical stability and significantly extends membrane lifetime under accelerated ...
Hendrik Sannemüller, Hannes Liepold, Frederik Brendel, Janka Friese, Carolin Klose, Tym de Wild, Andreas Münchinger   +6 more
wiley   +1 more source

Bioavailability and poultry fecal excretion of phosphorus from soybean-based diets supplemented with phytase

Revista Brasileira de Zootecnia, 2013
Five hundred and four 1-day-old Cobb broiler chickens were randomly allotted to 18 treatments and fed a semi-purified basal diet (4 g/kg total phosphorus) supplemented with 2 levels of supplemental P (0.5 or 1 g/kg) during 21 days to evaluate performance
Bianca Almeida Brandão Martins, Laura Maria de Oliveira Borgatti, Luiz Waldemar de Oliveira Souza, Simi Luiza Durante Aflalo Robassini, Ricardo de Albuquerque   +4 more
doaj  

Soil properties and quinoa yield as affected by irrigation and vermicompost application under a drip-tape irrigation system

Frontiers in Sustainable Food Systems
IntroductionQuinoa a crop with high nutritional value has the widespread adaptability to different climates and there is an increased demand for this product in the world. Characterized by roots with extensive penetration capabilities and wide, alternate
Diba Sheykhi Sanandaji, Gholamreza Heidari, Parviz Fathi, Habib Khodaverdiloo, Zahed Sharifi   +4 more
doaj   +1 more source

Combustive approach for measuring total volatile phosphorus content in landfill gas [PDF]

, 2005
A technique was developed to measure the total gaseous phosphorus content in biogas. The amount of air needed for a neutral to oxidising flame was mixed with the biogas.
ROELS, Joris, Vanhaecke, Frank, Verstraete, Willy   +2 more
core  

Phosphorus applications adjusted to optimal crop yields can help sustain global phosphorus reserves

Nature Food
With the longevity of phosphorus reserves uncertain, distributing phosphorus to meet food production needs is a global challenge. Here we match plant-available soil Olsen phosphorus concentrations to thresholds for optimal productivity of improved ...
R. McDowell, P. Pletnyakov, P. Haygarth
semanticscholar   +1 more source