منابع مشابه
Oxidation of Wool : Effect of Hydrogen Peroxide on Wool
The purpose of this investigation was to provide quantitative data showing the effect of oxidizing agents on wool as a basis for studying all processes in which wool is exposed to oxidation reactions. The work reported in this paper deals only with the effect of hydrogen peroxide. Data are presented showing the effects on wool of varying the concentration, temperature, and pH of the hydrogen pe...
متن کاملWool Grading
The American or Blood System The American system of grading wool was developed in the early 1800s when the native coarse-wooled sheep were being bred to finewooled Merino rams imported from Spain. It assumes that the offspring of the cross would have fleeces which were intermediate in fineness between the two parents. The wool grade is defined as the percentage of Merino blood carried by the sh...
متن کاملMedieval Sheep and Wool
I 'N THE PAPER I wrote twenty years ago on the origins of British breeds of sheep, I .attempted to integrate new evidence from archaeology with older documentary evidence.' Medieval archaeology was in its infancy, and the bone remains from sheep gave little information. Illustrations in illuminated manuscripts and later paintings gave better evidence than records. But the most striking new and ...
متن کاملEffect of Alkalies on Wool
Data on the effect of various alkaline reagents on the physical and chemical properties of wool yarn are presented. When wool is treated with dilute sodiumhydroxide solutions, a rapid splitting off of a portion of the sulphur occurs. On continued treatment, the sulphur content of the residual wool approaches a constant value of about 1.8 percent. The results indicate that the alkaline treatment...
متن کاملThe Enzymatic Digestion of Wool*
It has generally been accepted that keratins are not attacked by enzymes. In a review of the literature by Barritt (1) the property of non-digestibility was an essential part of the definition of a keratin. However, there has been evidence for the digestion of wool by pancreatin. Wool that had been suspended in solutions of varying pH (2 to 10) for 48 hours at room temperature was slowly attack...
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ژورنال
عنوان ژورنال: Nature
سال: 1955
ISSN: 0028-0836,1476-4687
DOI: 10.1038/176510a0