refers to molecular-level characteristics such as elemental composition, functional groups, and molecular conFormation of chemically resistant humic substances might be an formation that influence the inherent biodegradability important process controlling recycling of soil C to the atmosphere. of the molecule. Interactions refers to the intermolecular Humic substances are believed to be resist...

Mingquan Yan a*, , Gregory Korshin , Dongsheng Wang c 3 a Department of Environmental Engineering, Peking University, The Key Laboratory 4 of Water and Sediment Sciences, Ministry of Education, Beijing 100871, China; 5 b Department of Civil and Environmental Engineering, University of Washington, Box 6 352700, Seattle,WA 98195-2700, United States 7 c State Key Laboratory of Environmental Aquati...

Quantitative PCR is becoming the method of choice for the detection of pathogenic microorganisms and other targets in the environment. A major obstacle when amplifying DNA is the presence of inhibiting substances like humic acids that decrease the efficiency of PCR. We combined the polymeric adsorbent Supelite™ DAX-8 with a large-volume (10 mL) nucleic acid extraction method to decrease the hum...

The phase transitions and hygroscopic growth of two humic acid aerosols (Aldrich sodium salt and Leonardite Standard (IHSS)) and their mixtures with ammonium sulphate have been investigated using a combination of two techniques, Fourier transform infra-red (FTIR) spectroscopy and tandem differential mobility analysis (TDMA). A growth factor of 1.16 at 85% relative humidity (RH ) was found for t...

drought stress is the most limiting factor of agricultural production through the world. to evaluate the effect of super absorbent and humic acid to reduce drought stress in sugar beet production, a strip split plot arrangement based on randomized complete block design with three replications was conducted at research field of faculty agriculture, ferdowsi university of mashhad, iran during gro...

Organic compounds including seaweed extract were applied in organic production system and sustainable agriculture. One of these compounds is humic acid that was used widely in research and commercial programs. Humic acid is an organic acid obtained from humus and other natural resources with hormonal effects and improving nutrient absorption, increasing root and shoot biomass. In order to inves...

Laboratory measurements and modelling of metal-humic interactions under estuarine conditions 5 Abstract Equilibrium dialysis was used to measure Co-and Cu-binding by an isolated peat humic acid (PHA) in controlled laboratory experiments under simulated estuarine conditions: ionic strengths of 0.005-0.7 M in NaCl and mixed Na-Mg-Ca chloride solutions, with trace metal 5 concentrations of ~5x10-7...