Fiber selection and substitution

2018 ◽  
pp. 3-26 ◽  
Author(s):  
M. Miao ◽  
S. Gordon
Keyword(s):  
Fiber Selection

scholarly journals Fiber Selection for the Production of Nonwovens

10.5772/61977 ◽  
2016 ◽  
Author(s):  
Nazan Avcioglu Kalabek ◽  
Osman Babaarslan
Keyword(s):  
Selection For ◽  
Fiber Selection

Study on the Flexural Properties and Fiber-Selection Method of Fiber-Reinforced Geopolymer Concrete

2021 ◽  
Author(s):  
Chenggong Zhao ◽  
Zhiyuan Wang ◽  
Xianshuai Zeng ◽  
Zhenyu Zhu ◽  
Qiuyu Guo ◽  
...  
Keyword(s):  
Selection Method ◽  
Flexural Properties ◽  
Geopolymer Concrete ◽  
Fiber Reinforced ◽  
Fiber Selection

scholarly journals New View on Dietary Fiber Selection for Predictable Shifts in Gut Microbiota

mBio ◽  
2020 ◽  
Vol 11 (1) ◽  
Author(s):  
T. M. Cantu-Jungles ◽  
B. R. Hamaker
Keyword(s):  
Gut Microbiota ◽  
Microbial Communities ◽  
Dietary Fiber ◽  
Physical Characteristics ◽  
Dietary Fibers ◽  
Human Gut ◽  
Microbial Composition ◽  
Human Gut Microbiota ◽  
Selection For ◽  
Fiber Selection

ABSTRACT Dietary fibers can be utilized to shape the human gut microbiota. However, the outcomes from most dietary fibers currently used as prebiotics are a result of competition between microbes with overlapping abilities to utilize these fibers. Thus, divergent fiber responses are observed across individuals harboring distinct microbial communities. Here, we propose that dietary fibers can be classified hierarchically according to their specificity toward gut microbes. Highly specific fibers harbor chemical and physical characteristics that allow them to be utilized by only a narrow group of bacteria within the gut, reducing competition for that substrate. The use of such fibers as prebiotics targeted to specific microbes would result in predictable shifts independent of the background microbial composition.

Precision Molding of Advanced Fiber Structures

1970 ◽  
Author(s):  
J. C. Leslie
Keyword(s):  
Mechanical Properties ◽  
Elevated Temperatures ◽  
New Technologies ◽  
Specific Problem ◽  
Fiber Axis ◽  
Similar Degree ◽  
Design Considerations ◽  
Degree Of Anisotropy ◽  
The Many ◽  
Fiber Selection

New technologies are being developed to meet the special problems encountered in molding precision parts from highly anisotropic composite materials comprised of advanced fibers and resin. Design considerations require many different ply orientations to fully utilize superior fiber mechanical properties. Coincident with their directional mechanical properties, composites exhibit a similar degree of anisotropy in other physical properties. Measured thermal coefficients of expansion for graphite/epoxy laminates are of −0.5 × 10−6 in/in/F parallel to the fiber axis and 39 × 10−6 in/in/F perpendicular to the fiber axis. Since composite parts are cured at elevated temperatures, this anisotropy produces appreciable residual stress as well as stability problems in dimensions of the finished part. Examples of these problems are presented. In addition to specific problem areas, the many aspects of achieving a true precision molding are reviewed. Specifically, the fabrication variables associated with resin and fiber selection, consolidation, and cure procedures are discussed.

Determination of estrogenic short ethoxy chain nonylphenols and metabolites in river and treated water by SPE (solid phase extraction) and SPME (solid phase microextraction)

2003 ◽  
Vol 3 (1-2) ◽  
pp. 329-334
Author(s):  
A. Díaz ◽  
M.T. Galceran ◽  
F. Ventura
Keyword(s):  
Solid Phase Extraction ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Time Effect ◽  
Phase Extraction ◽  
Organic Modifiers ◽  
Treated Water ◽  
Headspace Spme ◽  
Fiber Selection

Two solid-phase microextraction (SPME) procedures have been developed to determine short ethoxy chain nonylphenols and metabolites in water. A direct-SPME method has been used for the determination of short ethoxy chain nonylphenols and their brominated derivatives, whereas the in-sample derivatization headspace-SPME method has proved to be suitable for the simultaneous determination of short ethoxy nonylphenols and their acidic metabolites. Several parameters affecting both SPME procedures, such as extraction mode, fiber selection, extraction time, effect of organic modifiers, derivatization reagents and temperature, were optimized. Both methods were able to determine all these compounds at the sub-mg/L level and the results obtained were compared to a solid phase extraction method (SPE). The procedures developed were applied to raw and treated water from Barcelona (NE Spain).

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