Results 1 to 10 of about 190,546 (118)

STM/STS Study of the Density of States and Contrast Behavior at the Boundary between (7 × 7)N and (8 × 8) Structures in the SiN/Si(111) System

open access: yesCrystals, 2022
The origin of the contrast appearing in STM images at the boundary between diverse ordered structures is studied using the example of two structures, (7 × 7)N and (8 × 8), formed in the system of a two-dimensional silicon nitride layer on the Si(111 ...
Vladimir Mansurov   +5 more
doaj   +1 more source

Study on NO formation characteristics and ammonia-nitrogen conversion behavior during ammonia-coal co-firing

open access: yes能源环境保护, 2023
Experiments were conducted on a laboratory drop tube furnace for the single-firing of ammonia and coal, as well as co-firing, combined with numerical simulations to investigate the NO formation characteristics, intermediate reaction processes and ammonia-
WANG Huakun   +4 more
doaj   +1 more source

Sustainability of the Dairy Industry: Emissions and Mitigation Opportunities

open access: yesFrontiers in Animal Science, 2021
Dairy cattle provide a major benefit to the world through upcycling human inedible feedstuffs into milk and associated dairy products. However, as beneficial as this process has become, it is not without potential negatives.
Carlyn B. Peterson, Frank M. Mitloehner
doaj   +1 more source

Uticaj oksidacije aktivnog uglja sumpornom kiselinom i impregnacije bakar-sulfatom na sorpcionu sposobnost gasnog filtra za zaštitu od dejstva amonijaka / Study of the effects of activated carbon oxidation with sulphuric acid and impregnation with copper sulphate on the protection capacity of gas filters against ammonia [PDF]

open access: yesVojnotehnički Glasnik, 2002
U radu je istraživana mogućnost poboljšanja kvaliteta aktivnog uglja (AU) za upotrebu u sredstvima za ličnu zaštitu respiratornih organa od dejstva amonijaka. Uzorci komercijalnih AU oksidovani su različitim količinama rastvora sumporne kiseline, masenih
Sretko Ilić , Dragan Nikolić
doaj   +1 more source

Alkaline Dehydration of Human Urine Collected in Source-Separated Sanitation Systems Using Magnesium Oxide

open access: yesFrontiers in Environmental Science, 2021
Fresh human urine, after it is alkalized to prevent the enzymatic hydrolysis of urea, can be dehydrated to reduce its volume and to produce a solid fertilizer. In this study, we investigated the suitability of MgO to alkalize and dehydrate urine.
Prithvi Simha   +3 more
doaj   +1 more source

Reactive Structures of Ammonia MILD Combustion in Diffusion Ignition Processes

open access: yesFrontiers in Energy Research, 2021
Reactive structures have been analyzed, when ammonia is used as a fuel, in a steady 1D counterflow diffusion flame layer, mimicking diffusion ignition processes.
G. Sorrentino   +5 more
doaj   +1 more source

Identifying Sources of Faecal Contamination in a Small Urban Stream Catchment: A Multiparametric Approach

open access: yesFrontiers in Microbiology, 2021
Small urban streams discharging in the proximity of bathing waters may significantly contribute to the deterioration of water quality, yet their impact may be overlooked.
Liam J. Reynolds   +10 more
doaj   +1 more source

A study concerning the pretreatment of CNTs and its influence on the performance of NIB/CNTs amorphous catalyst [PDF]

open access: yesJournal of the Serbian Chemical Society, 2006
As prepared carbon nanotubes were pretreated with nitric acid (CNTs-HNO3) or ammonia (CNTs-NH3). Fourier transform infrared spectroscopy (FTIR) measurements showed that the surface of the nanotubes was functionalized with carboxylic and hydroxyl ...
Hu-Yuan Chang   +3 more
doaj   +1 more source

Influence of Structural Parameters of Tesla Valve Flow Field on Performance of Fuel Cells

open access: yesEnergies
The optimization of flow channel structures significantly impacts the performance enhancement of proton exchange membrane fuel cells (PEMFCs). In this paper, the influences of the loop radius, inclination angle, and presence of the island in the Tesla ...
Hui Guo   +6 more
doaj   +1 more source

Total and yeast assimilable nitrogen composition in grape juices of three grapevine cultivars as affected by vineyard nitrogen fertilization [PDF]

open access: yesJournal of Central European Agriculture, 2011
Nitrogen fertilization is one of the common agrotechnical practices in vitculture, by which we can achieve higher content of nitrogen compounds in grapes.
Marko KAROGLAN   +6 more
doaj   +1 more source

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