scholarly journals Characterization of humic acids from a Brazilian Oxisol under different tillage systems by EPR, 13C NMR, FTIR and fluorescence spectroscopy

Geoderma ◽  
2004 ◽  
Vol 118 (3-4) ◽  
pp. 181-190 ◽  
Author(s):  
Martha González Pérez ◽  
Ladislau Martin-Neto ◽  
Sérgio C Saab ◽  
Etelvino H Novotny ◽  
Débora M.B.P Milori ◽  
...  
Keyword(s):  
Fluorescence Spectroscopy ◽  
Humic Acids ◽  
13C Nmr ◽  
Tillage Systems

scholarly journals Synthesis and spectral characterization of novel 1,5-benzodiazepine oxime derivatives

2019 ◽  
Vol 84 (4) ◽  
pp. 343-353
Author(s):  
Lina Rekovic ◽  
Lidija Kosychova ◽  
Irina Bratkovskaja ◽  
Regina Vidziunaite
Keyword(s):  
Nitrogen Atom ◽  
Fluorescence Spectroscopy ◽  
Organic Solvent ◽  
Elemental Analysis ◽  
13C Nmr ◽  
1H And 13C Nmr ◽  
Methyl Group ◽  
Oxime Derivatives ◽  
New Compounds

Three new 1,3,4,5-tetrahydro-2H-1,5-benzodiazepin-2-one oximes were synthesized and characterized by the methods of 1H- and 13C-NMR, IR and elemental analysis. Along with previously described compounds bearing one additional methyl group on the 5th nitrogen atom, the new compounds were characterized in bulk by UV?Vis and fluorescence spectroscopy in various solvents. The influence of the nature of the organic solvent on the spectra of the title compounds was investigated and is discussed.

13C NMR and FTIR spectroscopy characterization of humic acids in spodosols under tropical rain forest in southeastern Brazil

Geoderma ◽  
2008 ◽  
Vol 146 (3-4) ◽  
pp. 425-433 ◽  
Author(s):  
Martha González-Pérez ◽  
Pablo Vidal Torrado ◽  
Luiz A. Colnago ◽  
Ladislau Martin-Neto ◽  
Xosé L. Otero ◽  
...  
Keyword(s):  
Ftir Spectroscopy ◽  
Humic Acids ◽  
13C Nmr ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Southeastern Brazil

Characterization of humic acids produced during composting of olive mill wastes: elemental and spectroscopic analyses (FTIR and 13C-NMR)

Agronomie ◽  
2003 ◽  
Vol 23 (7) ◽  
pp. 661-666 ◽  
Author(s):  
Ghita Ait Baddi ◽  
Mohamed Hafidi ◽  
Véronique Gilard ◽  
Jean-Claude Revel
Keyword(s):  
Humic Acids ◽  
13C Nmr ◽  
Spectroscopic Analyses ◽  
Olive Mill Wastes ◽  
Olive Mill

Characterization of humic acids by two-dimensional correlation fluorescence spectroscopy

2008 ◽  
Vol 883-884 ◽  
pp. 155-159 ◽  
Author(s):  
K. Nakashima ◽  
Shaoyong Xing ◽  
Yongkuan Gong ◽  
Toru Miyajima
Keyword(s):  
Fluorescence Spectroscopy ◽  
Humic Acids ◽  
Two Dimensional

Synthesis and Characterization of Some New Esters Containing Heterocyclic and Derived From Azo Dyes

2019 ◽  
Vol 9 (02) ◽  
Author(s):  
Zena G. Alrecabi ◽  
Zainab Amer ◽  
Naeemah Al-Lami
Keyword(s):  
Schiff Base ◽  
13C Nmr ◽  
Azo Dyes ◽  
Spectral Methods ◽  
Anthranilic Acid ◽  
Heterocyclic Compounds ◽  
Synthesis And Characterization ◽  
Cooh Group ◽  
Molecular Weights

This study including prepared new colored esters containing heterocyclic with high molecular weights. In the first part of work we synthesized azo dyes [1,2] from the reaction p-toluidine with β-naphthol and o-nitro phenol, thin we synthesized Schiff bases [3,4] by the reaction anthranilic acid with benzaldehyde and dimethyl benzaldehyde. The reaction azo dyes (contain OH group) with Schiff base (contain COOH group) these led to produce the new colored esters [A1-A4]. The second part of work was modification the (C=N-) group in esters to heterocyclic compounds by reacting with phenyl iso cyanide to produce new β-lactam [B1-B4] and with anthranilic acid to get new hydroquinazoline [C1-C4]. All these compounds were characterized by physical properties and spectral methods FTIR, 1H-NMR and 13C-NMR.

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