superstructure
superstructure Like the term
base, that of superstructure was imported into Marxist discourse on the authority of Marx's reference to the sphere of production as being the ‘real foundation, on which rises a legal and political superstructure and to which correspond definite forms of social consciousness’, which appears in his
Preface to a Contribution to a Critique of Political Economy (1859). Conventionally, therefore, the superstructure of a society comprises its political and cultural (or ideological) realms. Issues such as how the superstructure relates to the base, precisely what it consists of and the nature of its internal dynamics, were discussed by Marx when he spoke of
ideology and the
fetishism of commodities. Since Marx's time these issues have been approached through such concepts as
hegemony and
discourse. The net result has been that the architectural metaphor upon which the distinction between the base and the superstructure conventionally rests is no longer an adequate summary of the complex relations that are now understood to obtain between the economic and the other realms of society. Arguably, as commentators such as G. A. Cohen have recently observed, Marx himself did not intend such a crude view of unidimensional and unidirectional causality. See also
MODE OF PRODUCTION;
SOCIAL FORMATION.
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Lignin-modified phenol-formaldehyde resin development for fiberboard.
Magazine article from: Forest Products Journal; 9/1/2004; ; 700+ words
; ...1980-1981 research of phenol-formaldehyde (PF) resins modified with Kraft lignin, lignosulfonate lignin, and Masonite wet-process spent "sludge" lignin, as well as 100 percent lignin binders for wet-process fiberboard. Resin development...
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Lignin formation in plants. The delemma of linkage specificity
Magazine article from: Plant Physiology; 8/1/2001; ; 700+ words
; ...the structural elements in lignins: the steric course of reactions mimicking lignin biosynthesis. Wood Sci Technol...Characterization of milled wood lignins and dehydrogenative polymerisates...Reference] kanen, eds, Lignin and Lignan Biosynthesis...
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Lignin Radicals in the Plant Cell Wall Probed by Kerr-Gated Resonance Raman Spectroscopy
Magazine article from: Biophysical Journal; 4/15/2006; ; 700+ words
; ABSTRACT Lignin radicals are crucial intermediates for lignin biosynthesis in the cell wall of vascular plants. In this...of their vibrational properties. For dry wood cells a lignin radical Raman band is observed at 1570 cm^sup -1^ irrespective...
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Lignin: Genetic engineering and impact on pulping
Magazine article from: Critical Reviews in Biochemistry and Molecular Biology; 1/1/2003; ; 700+ words
; ABSTRACT: Lignin is a major component of wood, the most...biochemistry and molecular biology underpinning lignin production are better understood than...prompted a number of re-evaluations of the lignin biosynthetic pathway. Some of the work...
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Condensed Lignins Are Synthesized in Poplar Leaves Exposed to Ozone
Magazine article from: Plant Physiology; 2/1/2004; ; 700+ words
; ...metabolic pathway leading to lignins were associated with a higher Klason lignin content in extract...In addition, stress lignins synthesized in response...suggested a role of lignin in disease resistance. Stress lignins formed in response to...
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Lignin: Properties and Materials.
Magazine article from: Chemistry and Industry; 2/5/1990; ; 700+ words
; Lignin: properties and materials Wood has always...specific attention only more recently. Lignin, one of the structural component molecules...commercial importance relatively recently. Lignin is the most complex polymer of the natural...
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Low lignin GM trees and forage crops.(Plight of Forests)
Magazine article from: Synthesis/Regeneration; 1/1/2005; ; 700+ words
; ...reinforcing rods, while concrete is represented by lignin. Lignin determines the rigidity, strength and resistance of...fiber is processed to make paper or composite products, lignin must be removed using polluting chemicals and a great...
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Structural alterations of lignins in transgenic poplars with depressed cinnamyl alcohol dehydrogenase of caffeic acid O-methyltransferase activity have an opposite impact on the efficiency of industrial kraft pulping
Magazine article from: Plant Physiology; 1/1/1999; ; 700+ words
; ...cross-linked nature of lignins, delignification of...considerable interest in lignin genetic engineering as...environmental costs. Wood lignins are composed of S and...delignification than deciduous wood lignins comprising both G and...achieved by lowering lignin concentration and/or...
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Fiber and Lignin Analysis in Concentrate, Forage, and Feces: Detergent Versus Enzymatic-Chemical Method
Magazine article from: Journal of Dairy Science; 6/1/2006; ; 700+ words
; ...ABSTRACT Hemicelluloses, cellulose, and lignin contents of contrasting feeds, with emphasis...acid detergent fiber, and acid detergent lignin) and the enzymatic-chemical procedure...noncellulosic polysaccharides, and Klason lignin). Also, feces from cows fed concentrates...
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Processing and study of novel lignin-starch and lignin-gelatin biodegradable polymeric films.
Magazine article from: Trends in Biomaterials and Artificial Organs; 1/1/2005; ; 700+ words
; ...this work, we have explored the possibility of extracting lignin from waste wood chips of a paper industry and blending lignin with established biopolymers like starch and gelatin. Lignin is one of the most commonly available natural materials...
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lignin
Book article from: World Encyclopedia
lignin Complex, non-carbohydrate substance that...often in combination with cellulose . It is lignin that gives wood its strength. To obtain pure...cellulose for the paper and rayon industries, the lignin has to be removed from wood.
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Fibers
Book article from: Chemistry: Foundations and Applications
...composed of cellulose (see Figure 1), lignin (see Figure 2), or similar compounds...mannose, xylose, and arabi-nose. Lignin polymers are often found in most plant...association with cellulose. The structure of lignin is not well defined, but lignin appears...
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Cellulose
Encyclopedia entry from: The Gale Encyclopedia of Science
...sorts, and transports macromolecules within a cell. Lignin — A polysaccharide that forms the secondary...is composed of yet another polysaccharide called lignin. For example, lignin is found in trees. The presence of both primary...
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Fossil Fuels
Book article from: Chemistry: Foundations and Applications
...plant material characteristically contains lignin, a carbon-based natural polymer that...upright against the pull of gravity. Lignin is much more resistant to bacterial degradation...composition of coal. The extent to which lignin and other plant matter has been metamorphosed...
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sclerenchyma
Book article from: A Dictionary of Biology
...A plant tissue whose cell walls have become impregnated with lignin. Due to the added strength that this confers, sclerenchyma...adjacent cells. Mature sclerenchyma cells are dead, since the lignin makes the cell wall impermeable to water and gases. Sclerenchyma...
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