Abstracts - faqs.org

Abstracts

Science and technology

Search abstracts:
Abstracts » Science and technology

Major structures

Article Abstract:

The strong-acid properties of fulvic acid from the Suwannee River, GA, were traced to polycarboxylic alpha-ether and alpha-ester groups. Strong-acid properties occur only if these groups are in ring structures with two to three additional electronegative groups such as ketone, ester and carboxyl groups in adjacent positions on the ring. The polycarboxylic alpha-ether and alpha-ester structures may also account for the amphiphilic and binding characteristics of fulvic acid.

Author: Leenheer, Jerry A., Wershaw, Robert L., Reddy, Michael M.
Publisher: American Chemical Society
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995
Organic acids

User Contributions:

Comment about this article or add new information about this topic:

CAPTCHA


Minor structures

Article Abstract:

Various tests were conducted to identify the structures responsible for the strong-acid characteristics of fulvic acid from the Suwannee River, GA. The results showed that keto acid and aromatic carboxyl-group structures account for 43% of the strong-acid characteristics of fulvic acid. The remaining 57% of strong-acid characteristics is due to aliphatic carboxyl groups in complex and unusual configurations that cannot be described using existing model compound data.

Author: Leenheer, Jerry A., Wershaw, Robert L., Reddy, Michael M.
Publisher: American Chemical Society
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995

User Contributions:

Comment about this article or add new information about this topic:

CAPTCHA


Model for humus in soils and sediments

Article Abstract:

Humus is an important factor in controlling the physical and chemical characteristics of soil. Although it only comprises a small percentage of the total mass of soil, the amount of humus determines the buffering capacity, metal binding capacity, sorption of hydrophobic organic compounds and soil particle stability. Humus is produced by the partial degradation of plant and animal molecules.

Author: Wershaw, Robert L.
Publisher: American Chemical Society
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1993
Soils, Soil analysis, Humus

User Contributions:

Comment about this article or add new information about this topic:

CAPTCHA


Subjects list: Research, Analysis, Environmental aspects, Fulvic acids, Suwannee River, Acidity function
Similar abstracts:
  • Abstracts: Tailoring the microstructure of a metal-reinforced ceramic matrix composite
  • Abstracts: NDE for steel bridges. Holding up. High-tech inspection
  • Abstracts: Lubricants. Going into service
  • Abstracts: Making electricity from trees. Counting 6LL3. Cracking the code
  • Abstracts: Great transitions. Improvements in health care. Expanding the uses of enzymes
This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.
Some parts © 2025 Advameg, Inc.