Coarse wool

Blackburn [88] has also determined some of the amino acids from medulla of wool fibers. Most wool fibers do not contain a medulla however, some coarse wools like kemp do contain this porous component. Although Blackburn s results are more qualitative, they agree in general with the data of Rogers, suggesting a low cystine content when compared to whole fiber, as well as relatively large amounts of acidic and basic amino acids. The low cystine content of medullary protein is consistent with its low sulfur content [89]. 

Microencapsulation is by far the most frequently used technology to micropackage cosmetic ingredients in textiles, where microcapsules typically have mean diameters of 1-10 fm, as compared to a range of 5-30 gm for a single textile fiber—from about 5 gm for microfibers to about 30 gm for coarse wool. The microcapsules can be modified in size, mechanical robusmess, and permeability to customize the release profile to best fit the intended functionality. 

Fiber length (mm) 10-60 technical fiber 450-800 elementary fiber 10-40 fine wool 55-75 coarse wool 150-300 reel silk 300-1000 m schappe silk 50-250 m... 

The titers of most carpet yarns are between 4.4 and 28 dtex. The titer range of the filament yarns for carpet production is 650 to 5,000 dtex. The titer of the single fiber is similar to that of coarse wool fibers. 

Coarse wool and long-staple synthetic fibers, especially polyamide and polyacrylonitrile, are processed with the mock-worsted spinning method. Mock-worsted yarns have an appearance similar to that of combed yarns and are used in textile floor coverings, decoration and furniture fabrics, blankets, craft knitting yarns, and technical products. Figure 3.35 shows a flow chart for the mock-worst spinning method. 

Exposure to microorganisms during 28 days leads to wool fiber degradation and, consequently, to noticeable mass reduction of all amino acids in the fiber composition. To the greatest extent, these changes are observed for coarse wool, where total qrrantity of amino acids is reduced by 10-12 rel. %, and for merino wool slightly lower reduction (4.7 rel. %) is observed. 

Medium diameter wool iacludes sheep breeds of English origin, eg, southdown, hampshire, dorset, and cheviot, as well as crossbreds, eg, Columbia, targhee, corriedale, and polwarth, from interbreeding with merinos. Coarse diameter wool comes from sheep chiefly bred for mutton, eg, Lincoln, cotswold, and leicester. 

Purified asbestos wool ( Gooch crucible asbestos for analysis ). Coarse and fine copper oxide. 

The lower explosive limit and minimum explosive concentrations of flax, wool, cotton, jute, hemp and sisal fibres are of the same order of magnitude as those of highly explosive dusts [15], The explosibility of pyrites dusts with sulfur contents above 20% was evaluated experimentally. Dusts of 30% sulfur content gave explosion pressures of 3 bar at pressure rise rates of 16 bar/sec. Mixtures of 60% pyrites and 40% powdered limestone still showed significant pressure effects, and the proportion of limestone actually needed to suppress explosions was considerably above the values currently accepted by mining industries [16], Effects of mixtures of particle sizes in combustible dusts upon minimum ignition temperature (T ") and upon presence or absence of explosion were studied. Presence of 30% of fines in a coarse dust lowers Tf significantly [17], Experimental explosions of polyethylene,... 

A glass tube (6-mm I.D. by 8-mm O.D. by 3-cm long) is packed with approximately 100 mg of sorbent in a front section and 50 mg in a backup section, each separated by glass wool plugs. Sorbents of coarse mesh size ( 20/40) are used to minimize the pressure drop across the tube. A calibrated personal sampling pump draws air through the sorbent tube at a flow rate of up to 1 liter/min. 

Vertical glass(seldom plastic or metal) tube 200-250mm long and ca 35mm in diam, provided at the bottom with a coarse porous porcelain disc or a loose wad of glass wool. This part of the tube is connected thru a std taper joint to a thistle-shaped funnel which is inserted(thru a hole in rubber stopper) into the neck of a bell jar suction filtrate assembly in the manner to... 

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