The fate of 14C-pentachlorophenol (14C-PCP) in soil inoculated with each of four wood degrading fungi was studied. After 9 wk of incubation with the fungi, the majority of the 14C (between 34 and 65%) was found bound to humic (HA), fulvic acid (FA) and humin, with lesser amounts found in the organic-extractable fraction or mineralized. The highest amounts of PCP were bound to HA (20-36% , compa...

The history of amino acid assay has been marked by numerous controversies on the problem of destruction of amino acids by acid hydrolysis of the protein or food. It has been generally conceded that when such hydrolyses are carried out in the presence of certain carbohydrates amino acids are destroyed. Recently Baldwin, Lowry, and Thiessen (1) reported that autoclaving casein with dextrose resul...

Naturwissenschaften 78 (1991) © Springer-Verlag 1991 been considered as major precursors of humin [l 3]. The classical concepts of the nature of the humin have been questioned over the last few years. Recent studies using l3C NMR spectrometry point to the need of identifying the nature of paraffinic material in the fine soil fractions [4]. The origin of the polymethylene structures in soil humu...

Humins are low-value-added byproducts from the biomass acid hydrolysis process. In the present work, humins were first employed as a phenol replacement for synthesis of modified phenol-formaldehyde adhesives through a two-step process. In this process, humins were first utilized to obtain alkaline soluble products, mainly consisting of phenolics, through a hydrothermal process. The obtained alk...

ABSTRACT The growth of swine production in Brazil has increased the amount and use pig slurry (PS) as soil fertilizer. This product provides nutrients to plants, a continuous application this residue usually increases total organic carbon (SOC) content. objective study was determine SOC content its distribution into humic substance fractions (humic acids, fulvic humin) an Oxisol annually fertil...

Many soils of the highlands of Serra do Mar, as in other mountain ranges, have thick histic horizons that preserve high amounts of carbon. However, the age and constitution of the organic matter of these soils remain doubtful, with possible late Pleistocene or Holocene ages. This study was conducted in three profiles (two in grassland and one in forest) in Serra da Igreja highlands in the state...

Rice plants accumulate cadmium (Cd2+) within the grain, increasing the danger of human exposure. Natural materials have been used in soil remediation, but few studies have examined the risks (based on the bioavailability of these metals to plants) of using these materials, so the practice remains controversial. In the present study, we evaluated the effectiveness of biochar produced from sugarc...

This article describes the technology of biohumus and humic extract production their microbiological characteristics. We developed from cattle manure winter wheat straw in a biodynamic fermenter to obtain biohumus. The received recovered therefrom were subjected analysis. largest physiological groups microorganisms aminoautotrophic ammonifiers. influence extraction on soil mycobiota was estimat...