Cell wall chemistry and tissue structure underlie shifts in material properties of a perennial kelp

This work presents the design of a parametric Kelvin structure in which the relative density of the geometry can be varied by adjusting three parameters: cell diameter, cell wall thickness and cell chamfer radius, the structure consistsing of a tessellation of hollow truncated octahedral. The developed model was evaluated in terms of compressive stiffness for the case of a rigid polyurethane foam of 0.256 relative density. Three models were analyzed in order to determine the influence of geometric characteristics on mechanical properties: a model that presented no chamfer a model that presented a medium-sized chamfer and a model that presented a large chamfer. A mesh convergence study was performed which analyzed the results in terms of accuracy and time expenses for three element sizes for both linear and quadratic elements. Due to the orthotropic nature of the model, its response on both possible loading directions was investigated. Simulation results were compared with experimental results and yielded accurate results for one loading direction, when using the material properties for solid polyurethane described in literature.

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Using 2D NMR spectroscopy to assess effects of UV radiation on cell wall chemistry during litter decomposition

Biogeochemistry ◽

10.1007/s10533-015-0132-1 ◽

2015 ◽

Vol 125 (3) ◽

pp. 427-436 ◽

Cited By ~ 16

Author(s):

Yang Lin ◽

Jennifer Y. King ◽

Steven D. Karlen ◽

John Ralph

Keyword(s):

Cell Wall ◽

Nmr Spectroscopy ◽

Litter Decomposition ◽

Uv Radiation ◽

2D Nmr ◽

2D Nmr Spectroscopy ◽

Cell Wall Chemistry

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Insight into plant cell wall chemistry and structure by combination of multiphoton microscopy with Raman imaging

Journal of Biophotonics ◽

10.1002/jbio.201700164 ◽

2017 ◽

Vol 11 (4) ◽

pp. e201700164 ◽

Cited By ~ 6

Author(s):

Zsuzsanna Heiner ◽

Ingrid Zeise ◽

Rivka Elbaum ◽

Janina Kneipp

Keyword(s):

Cell Wall ◽

Plant Cell ◽

Plant Cell Wall ◽

Multiphoton Microscopy ◽

Raman Imaging ◽

Cell Wall Chemistry ◽

Insight Into

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Effect of tissue type and variety on cell wall chemistry of onion (Allium cepa L.)

Food Chemistry ◽

10.1016/s0308-8146(97)00240-9 ◽

1998 ◽

Vol 63 (1) ◽

pp. 17-24 ◽

Cited By ~ 19

Author(s):

A. Ng ◽

A.C. Smith ◽

K.W. Waldron

Keyword(s):

Cell Wall ◽

Allium Cepa ◽

Tissue Type ◽

Allium Cepa L ◽

Cell Wall Chemistry

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The Constitutive Behavior of Metallic Foams Using Nanoindentation Technique and FE Modeling

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.297-300.1050 ◽

2005 ◽

Vol 297-300 ◽

pp. 1050-1055 ◽

Cited By ~ 11

Author(s):

Am Kee Kim ◽

Md Anwarul Hasan ◽

Seong Sick Choen ◽

Hak Joo Lee

Keyword(s):

Finite Element ◽

Cell Wall ◽

Uniaxial Compression ◽

Material Properties ◽

Density Variation ◽

Experimental Result ◽

Uniaxial Compression Test ◽

Al Alloy ◽

Second Phase ◽

Statistical Probability

Nanoindentation data measured on the cell-wall of Al-alloy foams were analyzed to obtain the material properties of the cell wall. Using the obtained material properties, stress-strain curve of the foam in uniaxial compression was constructed by finite element modeling. The model developed for the analysis was a multiple cell model which utilized the unit cells as the basic building block of the foam. Both the in-plane and through-thickness density variations of the foam were considered in the model. The through-thickness density variation which is a function of casting or foaming process was represented using different densities for different foam layers, while the in-plane density variation which arises from internal defects (such as porosities, second phase particle, inclusions etc.) was assumed to follow a statistical probability distribution of Gaussian type. Uniaxial compression test was performed and the finite element analysis result was compared with the experimental result. The numerical model used in the study overpredicted the crushing strength of foams indicating that the model needs to be improved for predicting the real foam properties with better accuracy.

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Omphalora, A New Genus in the Parmeliaceae

The Lichenologist ◽

10.1017/s002428299000041x ◽

1990 ◽

Vol 22 (4) ◽

pp. 355-365 ◽

Cited By ~ 9

Author(s):

Thomas H. Nash III ◽

Josef Hafellner ◽

Ralph S. Common

Keyword(s):

Cell Wall ◽

New Genus ◽

The Status ◽

Cell Wall Chemistry

AbstractThe status of four umbilicate lichens with lecanorine apothecia and hyaline, 1-celled ascospores is reviewed. It is concluded that Omphalodium should be emended to exclude O. arizonicum and consequently a new genus Omphalora T. Nash & Hafellner is proposed. Differences in anatomy, morphology, pseudocyphellae type, pigmentation and cell wall chemistry, and ascal dehiscence provide the primary justification for the new genus.

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