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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 174 for “"cell walls"”.
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Cell-walls of growing plant cells
The plant primary cell wall is a three-dimensional interwoven network of cellulose microfibrils, cross-linked by xyloglucan and dispersed in a pectin matrix. It has been suggested that in the wall of growing plant cells, xyloglucan is bound to the rigid cellulose microfibrils by hydrogen bonds and …
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Rheological properties of yeast cell walls
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nutrition and Food Science, 1981.
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A study of the molecular mechanics of wood cell walls
… structure works, with a focus on the cell wall material of stiff fibrils in a pliant matrix. Here we report a simple coarsegrained model of the fibrils and matrix to provide a bottom-up description of the mechanics. We identify the mechanical behaviors for varying fibril angles, and in …
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The role of brown algal cell walls in morphogenesis and development
… changes in the structure and mechanics of the cell wall. Despite taking different evolutionary paths, land plants and some brown algae exhibit great developmental and morphological similarities. In two brown algal model systems: the Sargassum muticum apex and the Fucus serratus embryo, I have …
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The amino acid and monosaccharide content of the cell walls of Thiobacillus thiooxidans
… large quantities of Thiobacillus thiooxidans cells, (b) to find an acceptable method of rupturing the cells, (c) to find an acceptable method of isolating the cell walls, and (d) to analyze the cell wall components, especially the amino acid and sugar components. The strain of T. thiooxidans …
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The effect of β-glucan structure on the rheological properties of yeast cell walls
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nutrition and Food Science, 1983.
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Structure and dynamics of plant cell walls and membrane peptides from solid-state NMR
… the architecture and loosening of primary plant cell walls and the interactions between membrane and peptides. Plant cell wall is a complex system mainly comprising three types of insoluble polysaccharides: cellulose, hemicellulose and pectin. The spatial arrangement of these macromolecules has …
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The Effect of Nanoconfined Liquid Properties on the Water-Responsive Behavior of Bacterial Cell Walls
… powerful, for example <em>Bacillus subtilis</em> cell walls display record-high actuation energy and power densities of 72 MJ m<sup>-3</sup> and 9.1 MW m<sup>-3</sup>, surpassing those of all existing muscles and actuator materials. They hold great potential to be used as high-performance …
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The effect of age on the structure and compostition of the cell walls of Choanephora cucurbitarum
… and composition of isolated and purified cell walls from cultures of Choanephora cucurbitarum was investigated by microchemical analyses, visible and infrared spectrophotometry, x-ray diffractometry and electron microscopy. Qualitative evaluation revealed the presence of lipids, proteins, …
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Structure and Utilization of Cell Walls of Normal and Brown Midrib Mutant Sorghum X Sudangrass Hybrids
… phenolic monomers commonly isolated from plant cell walls were separated and quantified on a phenylmentyl capillary column. Analysis of alkali-labile phenolics, which included vanillin and the cis and trans isomers of p-coumaric and ferulic acids, required less than 15 minutes. High resolution …
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Effects of Ammoniation, Ensiling and Sulfur Fertilization on Phenolic Composition of Gramineous Cell Walls and Their Digestion by Ruminants (Fescue)
… fertilization on phenolic composition of grass cell walls and on nutrient digestion by cattle.
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Wood cell wall modification with hydrophobic molecules
… is used for many applications because of its excellent mechanical properties, relative abundance and as it is a renewable resource. However, its wider utilization as an engineering material is limited because it swells and shrinks upon moisture changes and is susceptible to degradation by …
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Effects of Defects on the Performance of Hierarchical Honeycomb Metamaterials Realized Through Additive Manufacturing
<p>Cellular metamaterials are of immense interest for many current engineering applications. Tailoring the structural organization of cellular structures leads to new metamaterials with superior properties providing lightweight and very strong/stiff structures. The incorporation of hierarchy to …
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Molecular interactions of plant cell wall polymers
Specialised plant cells produce thickened cell walls, called secondary cell walls comprised of lignocellulose. The main polymers in lignocellulose are cellulose, xylan, galactoglucomannan and lignin. Lignocellulose forms the majority of biomass on the planet and its utilization for construction, …
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Taxonomic problems associated with named strains of Streptomyces cinnamonensis
… acids and carbohydrates present both in whole cells and in isolated cell walls. The organisms included in the study were Streptomyces cinnamonensis, ATCC strains 15413 and 12308, two subcultures of the type strain 154-T3 and a strain of S. virginiae obtained from the Upjohn Company, S. …
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Characterization of the expression patterns of <i>CELLULOSE SYNTHASE-LIKE A (CSLA)</i> genes in <i>arabidopsis thaliana</i> using reporter promoter-fusions and immunolocalization
<p>Plant cell walls are the most abundant source of renewable biomass on Earth. Cell wall carbohydrates have many practical applications (e.g., forage, building materials, biofuels, textiles, paper, etc.), and within plants they contribute to structure, provide defense, and facilitate cellular …
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Integrative analysis of heterogeneous plant cell wall related data
Plant cell walls are complex structures that underpin plant growth and are widely exploited in diverse human activities thus placing them with a central importance in biology. Cell walls have been a prominent area of research for a long time, but the chemical complexity and diversity of cell walls …
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Multi-Functional nano-structures in Nature: from optics to mechanics
… and nanomechanics of helicoidally arranged cellulose microfibrils in the cell walls of Pollia condensata fruits shed light on the origin of the chirality assembling in the plant cell walls. By studying the structural colours developed in the close affinity of Pachyrhynchus sarcitis weevils …
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Evolution of stomata in mosses (Bryophyta): From molecules to form and function
… are not as structurally distinct from epidermal cells as are tracheophyte stomata. Anatomical features such as the presence of a cuticle, water-conducting cells, and spongy tissues with large areas for gas exchange are more pronounced in Oedipodium sporophytes and support the role of stomata in …
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