Results 41 to 50 of about 817,315 (310)

The nature of the potassium compound acting as a promoter in iron-alumina catalysts for ammonia synthesis [PDF]

open access: yes, 1975
The chemical form of the potassium promoter on an iron-alumina catalyst during ammonia synthesis has been studied by two methods, viz, (i) the measurement of the equilibrium constant of the process KNH2 + H2 KH + NH3, and (ii) chemical analysis of the ...
Bolink, W.J.   +3 more
core   +3 more sources

3D (Bio) Printing Combined Fiber Fabrication Methods for Tissue Engineering Applications: Possibilities and Limitations

open access: yesAdvanced Functional Materials, EarlyView.
Biofabrication aims at providing innovative technologies and tools for the fabrication of tissue‐like constructs for tissue engineering and regenerative medicine applications. By integrating multiple biofabrication technologies, such as 3D (bio) printing with fiber fabrication methods, it would be more realistic to reconstruct native tissue's ...
Waseem Kitana   +2 more
wiley   +1 more source

Evaluation of organical fertilizers in relation to minimalization of air polution by greenhouse gases and amonia

open access: yesActa Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2006
Agricultural production presents one of the biggest producers of greenhouse gases. Between the most significant belongs carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), ozon (O3) and hydrogen sulphide (H2S). The work deals with classification of
Patrik Burg   +2 more
doaj   +1 more source

Characterization of Particle Size Distributions and Water-Soluble Ions in Particulate Matter Measured at a Broiler Farm

open access: yesAgriculture, 2023
The chemical composition and size distribution of particulate matter produced at broiler poultry houses is not well understood, so this is a novel study to understand the particulate size distributions at a poultry house as well as the ionic composition ...
Philip J. Silva   +12 more
doaj   +1 more source

Low myo-inositol and high glutamine levels in brain are associated with neuropsychological deterioration after induced hyperammonemia [PDF]

open access: yes, 2004
The neuropsychological effect of hyperammonemia is variable. This study tests the hypothesis that the effect of ammonia on the neuropsychological function in patients with cirrhosis is determined by the ability of the brain to buffer ammonia-induced ...
Balata, S   +8 more
core   +1 more source

Quantum Emitters in Hexagonal Boron Nitride: Principles, Engineering and Applications

open access: yesAdvanced Functional Materials, EarlyView.
Quantum emitters in hexagonal boron nitride have emerged as a promising candidate for quantum information science. This review examines the fundamentals of these quantum emitters, including their level structures, defect engineering, and their possible chemical structures.
Thi Ngoc Anh Mai   +8 more
wiley   +1 more source

Crystal structure of [Co(NH3)6][Co(CO)4]2

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2015
Hexaamminecobalt(II) bis[tetracarbonylcobaltate(-I)], [Co(NH3)6][Co(CO)4]2, was synthesized by reaction of liquid ammonia with Co2(CO)8. The CoII atom is coordinated by six ammine ligands.
Thomas G. Müller, Florian Kraus
doaj   +1 more source

First Measurement of Ambient Air Quality on the Rural Lower Eastern Shore of Maryland

open access: yesAgronomy, 2023
Concerns about atmospheric ammonia have been expressed recently by some on the Lower Eastern Shore (LES) of Maryland, which lies between the Chesapeake Bay and the Atlantic Ocean on the Delmarva peninsula. Agriculture, seafood and tourism are responsible
Bernice Bediako, Deborah G. Sauder
doaj   +1 more source

Unveiling Sources of Heating in the Vicinity of the Orion BN/KL Hot Core as Traced by Highly Excited Inversion Transitions of Ammonia

open access: yes, 2011
Using the Expanded Very Large Array, we have mapped the vicinity of the Orion BN/KL Hot Core with sub-arcsecond angular resolution in seven metastable inversion transitions of ammonia: (J,K)=(6,6) to (12,12).
Chandler, C. J.   +4 more
core   +1 more source

Global oceanic emission of ammonia: constraints from seawater and atmospheric observations [PDF]

open access: yes, 2015
Current global inventories of ammonia emissions identify the ocean as the largest natural source. This source depends on seawater pH, temperature, and the concentration of total seawater ammonia (NHx(sw)), which reflects a balance between ...
Baker, Alex   +8 more
core   +1 more source

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