Active ingredients of HS consist of humus, humic acid (HA), fulvic acid (FA), ulmic acid
, and some microelements (Senn and Kingman, 1973).
Fourier Transform Ion Cyclotron Resonance (FT-ICR) and Matrix Assisted Laser Desorption Ionization (MALDI) mass spectrometry are used to systematically study ulmic acid extracts taken from a sediment sample in the Gulf of Mexico.
Keywords: Ulmic acid, FT-ICR, MALDI-TOF-MS, bryostatin
Ulmic acid is defined as the alcohol-based extract of naturally-occurring organic matter (NOM).
The focus of this paper is to use FT-ICR in the role of elemental analysis for molecular components of ulmic acid taken from an ecosystem in the Gulf of Mexico.
Sagorchev, "The influence of fulvic and ulmic acids
from peat, on the spontaneous contractile activity of smooth muscles," Phytomedicine, vol.
The chemical analysis of mud does not only reveal hydrophilic organic substances, such as humic, fulmic, and ulmic acids
, but also organic substances composed of fatty acids.
The influence of fulvic and ulmic acids
from peat on the spontaneous contractile activity of smooth muscles.
With a view to clarifying the excitatory action of aqueous peat extract (APE) on the spontaneous contractile activity (SCA) of the smooth muscles, in vitro studies were made of the influences of the water-soluble HPLC-fractions of fulvic and ulmic acids separated from peat on smooth-muscle preparations of guinea-pig stomach.
Key words: peat, smooth muscles, fulvic acids, ulmic acids, [[alpha].sub.2]-adrenoreceptors, [D.sub.2]-dopamine receptors
The obvious differences in the action of fulvic and ulmic acids on SCA of the smooth muscles let us suggest that the observed excitatory effect is due to more than one constitutent of peat.
The extraction of the water-soluble components of fulvic and ulmic acids is shown on Diagram 1.