Results 91 to 100 of about 1,069,262 (320)

Marine ecosystem model analysis using data assimilation

open access: yes, 2009
Numerical modelling of the marine ecosystem requires the aggregation of diverse chemical and biological species into broad categories. To avoid large bias errors it is preferable to resolve as many explicit state variables and processes as possible.
Ward, Ben Andrew
core   +1 more source

Alternate wetting and drying and nitrogen fertilizations under different soil conditions alter carbohydrate and nitrogen metabolisms in rice

open access: yesApplied Biological Chemistry
Rice (Oryza sativa L.), a key staple crop, contributes over 20% of the daily caloric intake for more than 3.5 billion people worldwide. The continuous growth of the global population necessitates a steady increase in rice production, promoting ...
Kyoung Rok Geem   +2 more
doaj   +1 more source

Acidogenic fermentation of pretreated food waste under psychrophilic conditions for volatile fatty acids production

open access: yesBiofuels, Bioproducts and Biorefining, EarlyView.
Abstract Mixed‐culture fermentation generally produces volatile fatty acids (VFAs) as a mixture of C2–C6 acids. Among operational parameters, temperature has a distinct effect on the microorganisms' metabolic activity, which can shift the composition of the metabolites.
Reema Kumar   +4 more
wiley   +1 more source

Quantifying the fate of wastewater nitrogen discharged to a Canadian river

open access: yesFACETS, 2019
Addition of nutrients, such as nitrogen, can degrade water quality in lakes, rivers, and estuaries. To predict the fate of nutrient inputs, an understanding of the biogeochemical cycling of nutrients is needed. We develop and employ a novel, parsimonious,
Jason J. Venkiteswaran   +2 more
doaj   +1 more source

Nitrogen Fixation and Translocation in Sugarcane [PDF]

open access: yes, 2008
World sugarcane production is increasing rapidly as a biofuel. In some areas in Brazil, sugarcane has been grown continually over very long periods without N fertiliser inputs. Therefore, the occurrence of N fixation has been suspected.
Kuni Sueyoshi   +6 more
core  

Bioeconomy, sustainability, and digital technologies in Haematococcus lacustris biomass and astaxanthin production: advances and outlook

open access: yesBiofuels, Bioproducts and Biorefining, EarlyView.
Abstract Astaxanthin is a carotenoid with strong antioxidant properties, used in research on cancer treatment, ocular injuries, and neurological disorders. When produced by the microalgae Haematococcus lacustris, its antioxidant potential is even higher than that of the synthetic molecule, making it particularly attractive for pharmaceutical and ...
Renata Kühl Rocha   +5 more
wiley   +1 more source

Quantitative Partitioning of Photoautotrophic and Photoheterotrophic Contributions During Mixotrophic Growth of Scenedesmus obliquus

open access: yesBiotechnology and Bioengineering, EarlyView.
Carbon and oxygen fluxes during photoautotrophic, photoheterotrophic and mixotrophic growth of Scenedesmus obliquus. ABSTRACT Mixotrophic growth of microalgae involves the simultaneous assimilation of inorganic and organic carbon sources, but the quantitative contributions of photoautotrophic and photoheterotrophic metabolisms remain poorly resolved ...
Solène Jahan   +7 more
wiley   +1 more source

Improving Simulations of Rice Growth and Nitrogen Dynamics by Assimilating Multivariable Observations into ORYZA2000 Model

open access: yesAgronomy
The prediction of crop growth and nitrogen status is essential for agricultural development and food security under climate change scenarios. Crop models are powerful tools for simulating crop growth and their responses to environmental variables, but ...
Jinmin Li   +5 more
doaj   +1 more source

Markers and signals associated with nitrogen assimilation in higher plants

open access: yes, 2003
A key concept underpinning current understanding of the carbon/nitrogen (C/N) interaction in plants is that the capacity for N assimilation is aligned to nutrient availability and requirements by the integrated perception of signals from hormones ...
Foyer, C. H.   +5 more
core  

Nitrogen fixation and nitrogenase activity of Azotobacter chroococcum [PDF]

open access: yes, 1974
The purpose of the present investigation was to study the effect of some chemical, physical and biological factors on growth, efficiency of nitrogen fixation and nitrogenase activity of Azotobacter chroococcum.From biochemical studies with cell-free ...
Brotonegoro, S.
core  

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