نتایج جستجو برای: humin

تعداد نتایج: 158  

Journal: :Journal of health sciences and medicine 2023

Aims: The rate of adrenal mass detection has increased due to the development imaging modalities. It is vital differentiate benign adenomas from other masses in order establish whether an active management strategy essential. Volumetric CT histogram analysis calculates percentage covered pixels negative attenuation region. goal this research was evaluate diagnostic utility volume for tumors con...

Journal: :Applied Catalysis B-environmental 2022

5-Hydroxymethylfurfural (HMF) synthesis from glucose over in-situ phosphated titania catalysts is presented. Phosphates were incorporated into framework forming a titanium phosphate surface layer, where the coordinatively unsaturated tetrahedral TiO 4 units act as water-tolerant Lewis acid site (LAS) and adjacent protonated Brønsted (BAS), together Lewis-Brønsted pairs at molecular-level proxim...

Journal: :Comunicata Scientiae 2023

The use of humic substances (HS) in the soil can increase efficiency nitrogen fertilizers and contribute to increment organic matter plant nutrient availability. Hence, this study aimed evaluate, two production cycles, effect applying HS different (N) doses on chemical attributes fractions a cultivated with West Indian cherry Brazilian semiarid region. experiment was set up split plots, arrange...

Journal: :Journal of Industrial and Engineering Chemistry 2021

5-hydroxymethylfurfural (HMF), accessible from various feedstocks, represents an important renewable platform-chemical, precursor for valuable biofuels and bio-based chemicals. In this work, the continuous hydrogenation of aqueous solution HMF to give strategic monomers, 2,5-bis(hydroxymethyl)furan (BHMF) 2,5-bis(hydroxymethyl)tetrahydrofuran (BHMTHF) was investigated in a flow reactor adopting...

Journal: :Chemical Engineering Journal 2021

• Experimental and in-silico study on HDO of biobased 5-hydroxymethylfurfural. Deoxygenation at higher temperatures relative to reduction the aldehyde. Despite reducibility improvements, La promotion slowed reaction rates activity. Nb facilitated deoxygenation humin formation. Directly comparable kinetic parameters TOF for carbon-supported Ni catalysts. Catalytic hydrodeoxygenation hydroxymethy...

2003
F. J. Stevenson R. A. Olsen

An understanding of the chemistry and reactions of humic acids and related substances is crucial to an understanding of the nature and properties of soils. A comprehensible structural representation of humic substances is presented and the simplified model is used to illustrate: (i) the way in which stable humus is formed from lignin; (ii) forms of organic N in soils; (iii) the interaction of h...

2005
Kelly K. Moran Johan Six William R. Horwath Chris van Kessel

of plant residue C and N. Application of 15N-labeled fertilizer or maize residue together resulted in more than The role of mineral fertilizer-N inputs and N deposition to agricultwice as much 15N recovered from fertilizer than from tural and natural ecosystems can affect plant residue decomposition and soil C processes. Yet it is still unclear whether residue-N or residue in the SOM (Dourado-N...

Journal: :Agronomy 2023

Organic amendments have been widely confirmed to support soil health and agricultural sustainability. However, the effects mechanisms of long-term organic combined with chemical fertilizers on carbon (SOC) sequestration macroaggregate formation are still unclear. Therefore, this study aimed explore interaction between agglomeration after 12 years fertilization. Seven treatments within a field e...

Journal: :Agronomy 2022

In agroecosystems, effective straw return modes are one of the key practices for increasing soil fertility and carbon (C) availability. Although they improve quality, there is currently little information available regarding influence distinct with respect to potential organic (SOC) sequestration. this study, we established a five-year (2015–2019) field experiment in Mollisols Northeast China, ...

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