The supramolecular structure of humic substances

Soil Science

Volumn 166, Issue 11, 2001, Pages 810-832

  Piccolo, A ^a  

^a UNIVERSITY OF NAPLES FEDERICO II   (Italy)

Author keywords

Humic substance structure; Size exclusion chromatography; Supramolecular associations

Indexed keywords

HUMIC SUBSTANCE; MOLECULAR ANALYSIS;

EID: 0035212659     PISSN: 0038075X     EISSN: None     Source Type: Journal    
DOI: 10.1097/00010694-200111000-00007     Document Type: Review

References (125)

1. Introductory remarks
2. Determination of molecular weights of humic substances by colligative property measurements
3. The contribution of lignin to the composition of humic acids from a wheat-straw amended soil during 3 years of incubation in pots
4. Fractionation of humic acid by gel permeation chromatography
5. Role of microstructural properties in time-dependent sorption/desoprtion behaviour of 1,2-dichloroethane on humic substances
6. High-performance size exclusion chromatography of chlorinated natural humic water and mutagenicity studies using the microscale fluctuation essay
7. Gel filtration chromatography of humic substances in soil solutions using HPLC-determination of the molecular weight distribution
8. Increase in thermal stability of soil humic substances as a result of self-association
9. Molecular weight and shape of humic acid from sedimentation and diffusion measurements on fraction extracts
10. Calibration of gel permeation chromatography materials for use with humic acid
11. Applicability of the carbon dating method of analysis to soil humus studies
12. Binding of DDT to dissolved humic material
13. Molecular size distribution of soil humic substances with ionic strength
14. High-performance liquid chromatography: Effective protein purification by various chromatographic modes
15. Paramagnetic relaxation of atrazine solubilized by humic micellar solutions
16. The abundance, distribution, and configuration of porewater organic colloids in recent sediments
17. Molecular weight, polydispersity, and spectroscopic properties of aquatic humic substances
18. Sizes and shapes of humic substances by viscosity measurements
19. Sizes and shapes of humic substances
20. 13C-NMR spectroscopy
21. High pressure size exclusion chromatography (HPSEC) of humic substances. Molecular sizes, analytical parameters, and columns performance
22. Conformational arrangement of dissolved humic substances. Influence of solution composition on association of humic molecules
23. Diffusion of humic acid in dilute aqueous solution
24. Polymerization of dissolved humic substances catalyzed by peroxidase. Effects of pH and humic composition
25. Conformational changes of soil humic substances induced by some hydroxy-, cheto-, and sulphonic acids
26. Does ionic strength affect the configuration of aquatic humic substances, as indicated by gel filtration?
27. Sizes and shapes of humic substances by gel chromatography
28. Source of aromatic affinity of Sephadex dextran gels
29. The chemistry of soil humic substances
30. Micro-organization of dissolved humic acids
31. The effect of molecular size on humic acid associations
32. Die Chemie der organischer Stoffe in Boden und deren physiologische Wirkung
33. Generation of model chenfical precursors
34. Investigations of humic acids with the analytical ultracentrifuge
35. Chemical composition and physical properties of humic substances
36. Hymatomelanic acids as polyelectrolytes: 1. Viscosinretric and osmometric studies
37. Macromolecular structures of humic substances
38. Polymer properties of lignin and lignin derivatives
39. The synthesis and degradation of humic substances in soil
40. Synthesis and transformation of phenolic compounds by Epicoccus nigrum in relation to humic acid formation
41. Silylation of soil organic matter. Extraction of humic compounds and soil-bound residues
42. Sedimentary humic and fulvic acid as surface active substances
43. Emerging concepts of the compositions and structures of humic substances
44. Polymerization of humic substances in natural environments
45. Solubilization of native membrane proteins
46. Poly(methylene) crystallites in humic substances detected by nuclear magnetic resonance
47. Microorganisms and humus in soils
48. The fate of plant and animal residues in soil
49. Investigations of some structural properties of humic substances by fluorescence quenching
50. Enzymatic coupling of the herbicide betazon with humus monomers and characterization of reaction products
51. Solid-state 19F NMR investigation of hexafluorobenzene sorption to soil organic matter
52. Soil organic matter
53. Determination of size, molecular weight and presence of subunits
54. Adsorption effects in gel filtration of humic acid
55. Formation d'humus et de combustibles mineraux sans intervention de l'oxygene atmospherique, des microorganismes des hautes temperatures ou des fortes pressions
56. The uniqueness of humic substances in each soil, stream, and marine environment
57. Phenolic polymers of Stachibotrys atra, Stachibotrys chartarum and Epicoccus nigrum in relation to humic acid formation
58. Infrared and fluorescence spectroscopy of glyphosate-humic acid complexes
59. Fluorescence quenching studies of Naphtalene and 1-Naphthol interaction with humic acid
60. Fractionation of natural organic matter by size exclusion chromatography-properties and stability of fractions
61. Polyelectrolytic behaviors of humic acids
62. Release of the hormone-like activities from Allophobora rosea (sav.) and Allophobora caliginosa (sav.) feces
63. Molecular parameters of humic acids
64. Characteristics of soil humic substances extracted with some organic and inorganic solvents and purified by the HC1-HF treatment
65. Effects of different organic waste amendments on soil microaggregates stability and molecular sizes of humic substances
66. Characteristics of molecular size fractions of humic substances derived from oxidized coal
67. 13C-NMR spectra of humic substances extracted with different mechanisms
68. Structural characteristics of humic substances as related to nitrate uptake and growth regulation in plant systems
69. Humus and soil conservation
70. Macromolecular changes of soil humic substances induced by interactions with organic acids
71. Micellelike conformation of humic substances as revealed by size-exclusion chromatography
72. Interactions of Glyphosate with humic substances
73. Atrazine interactions with soil humic substances of different molecular structure
74. Effects of mineral and monocarboxylic acids on the molecular association of dissolved humic substances
75. Molecular size of humic substances. Supramolecular associations versus macromolecular polymers
76. Differences in high performance size exclusion chromatography between humic substances and macromolecular polymers
77. Polymerization of humic substances by an enzyme catalyzed oxidative coupling
78. Molecular sizes and association forces of humic substances in solution
79. Chromatographic and spectrophotometric properties of dissolved humic substances compared with macromolecular polymers
80. 1h-nmr spectroscopy
81. Some physicochemical properties of peat humic acids
82. A study of humic acids by equilibrium centrifugation
83. Derivatization and structural studies by spectroscopic methods of humic acids from Leonardite
84. Determination of molecular weights of humic substances by analytical (UV scanning) ultracentrifugation
85. Calculation of molecular weights of humic substances from colligative data: Application to aquatic humus and its molecular size fractions
86. The effect of pH and metal binding on the transport properties of humic acids
87. Fluorescence quenching titration for determination of complexing capacities and stability constants of fulvic acid
88. Analytical pyrolysis of humic substances: Pitfalls, limitations and possible solutions
89. The chemical structure of humic substances: Recent advances
90. Analytical pyrolysis and computer modeling of humic and soil particles
91. New insights into organic-mineral particles: Composition, properties, and models of molecular structure
92. The structure and association of organic molecules in the terrestrial environment
93. Decomposition of maize straw in different European soils as revealed by DRIFT spectra of soft particle fractions
94. Specific interactions of organic substances in size-exclusion chromatography
95. Physico-chemical investigations of clay-adsorbed organic colloids: II
96. Humus Chemistry
97. Molecular size distribution and spectroscopic characterization of humic substances
98. Gel chromatography of humic acid
99. Molecular weight, shape, and size of humic substances by ultracentrifugation
100. Macromolecular properties of soil humic substances: Fact, fiction, and opinion
101. Micelles, subunits, and the Mediterranean sun
102. Molecular size and weight measurements of humic substances
103. Polyacrilamide gel electrophoresis of soil humic acid fractionated by size-exclusion chromatography and ultrafiltration
104. Colloidal chemical properties of humic matter
105. Secondary structure of humic acids: Can micelle-like conformation be proved by aqueous size-exclusion chromotography?
106. Formation and characterization of OH-Al-humate-montmorillonite complexes
107. A physico-chemical study of the properties of humic acids and their changes during humification
108. Characterization of humic acid size fractions by SEC and MALS
109. Characterization of soil-bound residue fractions of the fungicide dithianon by gel permeation chromatography and polyacrilamide gel elctrophoresis
110. New results of humus research
111. A new model for humic materials and their interactions with hydrophobic chemicals in soil-water and sediment-water systems
112. Size and shape of humic substances by scattering techniques
113. Model for humus in soils and sediments
114. Molecular aggregation of humic substances
115. Molecular size and weight measurements of humic substances
116. Surface active properties of soil humic acids