scholarly journals Influence of Cellulose Chain Length on the Mechanical Behavior of Douglas Fir Wood in Tension Parallel to Grain

1963 ◽  
Vol 39 (4) ◽  
pp. 487-488
Keyword(s):  
Mechanical Behavior ◽  
Chain Length ◽  
Douglas Fir ◽  
Cellulose Chain

scholarly journals Mechanical Behavior of Separated Earlywood and Latewood of Douglas–Fir Using Digital Image Correlation Method

2014 ◽  
Vol 59 (1) ◽  
pp. 127-131
Author(s):  
Chun–Won Kang ◽  
Matthew Schwarzkope ◽  
Lech Muszynski ◽  
Taiquan Jin ◽  
Hee–Jun Park ◽  
...  
Keyword(s):  
Digital Image Correlation ◽  
Mechanical Behavior ◽  
Digital Image ◽  
Correlation Method ◽  
Douglas Fir ◽  
Image Correlation ◽  
Digital Image Correlation Method

On the relationship between fibre length, cellulose chain length and pulp viscosity of a softwood sulfite pulp

Holzforschung ◽  
2006 ◽  
Vol 60 (4) ◽  
pp. 372-377 ◽  
Author(s):  
Luc Lapierre ◽  
Jean Bouchard ◽  
Richard Berry
Keyword(s):  
Chain Length ◽  
Fibre Length ◽  
Indirect Measurement ◽  
Pulp Mills ◽  
Cellulose Chain ◽  
Degree Of Polymerisation ◽  
Pulp Viscosity ◽  
Average Fibre ◽  
Sulfite Pulp ◽  
Pulp Strength

Abstract Many chemical pulp mills use pulp viscosity as an indicator of pulp strength, and some mill customers stipulate a particular viscosity threshold for the delivered product. Nevertheless, the value of the viscosity-strength relationship is often questioned, particularly as it varies with the wood species and the pulping process. To provide some insight, the viscosity, degree of polymerisation and fibre length were measured for a bleached softwood sulfite pulp segregated into different fractions with respect to fibre length using a Bauer-McNett fractionator. It was demonstrated that fractions with a longer average fibre length also had a higher degree of polymerisation and higher viscosity. The cellulose chain length in chemical pulps is approximately three orders of magnitude shorter than the fibre length, and thus a relationship between these two properties should not be expected. The possible causes of the correlation between fibre length and viscosity are discussed. In this work, viscosity appears to be an indirect measurement of the average fibre length of a pulp, which would be the direct contributor to the strength of that pulp.

Application of TEM to Deformation, Wear, and Fracture of Ceramics

1974 ◽  
Vol 32 ◽  
pp. 472-473
Author(s):  
B. J. Hockey
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Mechanical Behavior ◽  
Brittle Materials ◽  
High Temperature Strength ◽  
Wide Range ◽  
Corrosive Environments ◽  
Further Development

Ceramics, such as Al2O3 and SiC have numerous current and potential uses in applications where high temperature strength, hardness, and wear resistance are required often in corrosive environments. These materials are, however, highly anisotropic and brittle, so that their mechanical behavior is often unpredictable. The further development of these materials will require a better understanding of the basic mechanisms controlling deformation, wear, and fracture.The purpose of this talk is to describe applications of TEM to the study of the deformation, wear, and fracture of Al2O3. Similar studies are currently being conducted on SiC and the techniques involved should be applicable to a wide range of hard, brittle materials.

Satiation in humans is modulated by fatty acid chain length

2001 ◽  
Vol 120 (5) ◽  
pp. A710-A710
Author(s):  
S LAL ◽  
J MCLAUGHLIN ◽  
O NIAZ ◽  
G DOCKRAY ◽  
A VARRO ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Chain Length ◽  
Fatty Acid Chain Length ◽  
Fatty Acid Chain
Sign in / Sign up

Export Citation Format

Share Document