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Simple high-performance liquid chromatography-ultraviolet method to quantify the molecular size distribution of nonylphenol ethoxylates
(American Chemical Society, 2014-01-30)
Polyethoxylated nonylphenols (NPEOx) are widely used in various domestic and industrial applications. These commercial products are mixtures of oligomers that affect aquatic ecosystems, acting as endocrine disruptors. In ...
Multi-method Study on Aquatic Humic Substances from the Rio Negro - Amazonas State/Brazil: Emphasis on Molecular-Size Classification of their Metal Contents
(Sociedade Brasileira de Química, 1999-01-01)
As substâncias húmicas aquáticas investigadas foram convencionalmente extraídas de amostra de água coletada no Rio Negro - AM, Brasil utilizando-se resina XAD 8. Investigações usando ressonância nuclear magnética de próton ...
Multi-method Study on Aquatic Humic Substances from the Rio Negro - Amazonas State/Brazil: Emphasis on Molecular-Size Classification of their Metal Contents
(Sociedade Brasileira de Química, 1999-01-01)
As substâncias húmicas aquáticas investigadas foram convencionalmente extraídas de amostra de água coletada no Rio Negro - AM, Brasil utilizando-se resina XAD 8. Investigações usando ressonância nuclear magnética de próton ...
Multi-method Study on Aquatic Humic Substances from the Rio Negro - Amazonas State/Brazil: Emphasis on Molecular-Size Classification of their Metal Contents
(Sociedade Brasileira de Química, 2014)
CHANGES IN MOLECULAR-SIZE DISTRIBUTION OF CELLULOSE DURING ATTACK BY WHITE ROT AND BROWN ROT FUNGI
(AMER SOC MICROBIOLOGY, 1992)
The kinetics of cotton cellulose depolymerization by the brown rot fungus Postia placenta and the white rot fungus Phanerochaete chrysosporium were investigated with solid-state cultures. The degree of polymerization (DP; ...
Randomly-Branched Polymers by Size Exclusion Chromatography with Triple Detection: Computer Simulation Study for Estimating Errors in the Distributions of Molar Masses and Branching Degrees
(Wiley, 2013-12)
This article theoretically evaluates the biases introduced into the distributions of molar masses (MMD) and number of long chain branches per molecule (LCBD), when randomly branched polymers are analyzed by size exclusion ...
Relationship between the molecular structure of duckweed starch and its in vitro enzymatic degradation kinetics
(2019-10-15)
Starch molecular structural effects in duckweed (Lemna minor and Landoltia punctata) controlling in vitro enzymatic degradation kinetics was studied. The molecular size distributions of fully-branched starches and the chain ...
Distribution of Cr, Ni, Cu, Cd and Pb in different molecular size of humic fractions extracted from water and sediment samples collected at Anhumas reservoir - Araraquara/SP
(Editora Unesp, 2002-01-01)
In this work was studied the distribution of Cr, Ni, Cu, Cd and Pb in humic fractions with different molecular size. The HS were extracted from waters (AHS), surface sediments (HESS), interface water sediment (HSIS) and ...
Distribution of Cr, Ni, Cu, Cd and Pb in different molecular size of humic fractions extracted from water and sediment samples collected at Anhumas reservoir - Araraquara/SP
(Editora Unesp, 2002-01-01)
In this work was studied the distribution of Cr, Ni, Cu, Cd and Pb in humic fractions with different molecular size. The HS were extracted from waters (AHS), surface sediments (HESS), interface water sediment (HSIS) and ...
The nearly neutral and selection theories of molecular evolution under the fisher geometrical framework: Substitution rate, population size, and complexity
(2012)
The general theories of molecular evolution depend on relatively arbitrary assumptions about the relative distribution and rate of advantageous, deleterious, neutral, and nearly neutral mutations. The Fisher geometrical ...