Diameter variations of irregular fibers under different tensions

Deng, Chuanming; Wang, Lijing; Wang, Xungai

doi:10.1007/bf02876003

Cited by 7 publications

(3 citation statements)

References 17 publications

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“…The almost central POB found in autumn wool may be attributed to the lower FD Av and FD SD recorded during this season (Table 2). In this way, Deng et al (2007) claimed that within staple fiber diameter variations were found to have greater prevalence to breakages, particularly where fiber diameters were at their fineness (Gourdie et al, 1992). Values of ELR increased (P<0.01) in autumn than in spring by about 6%.…”

Section: Wool Productionmentioning

confidence: 95%

Wool Production and Characteristics, Physiological and Haematological Parameters and Level of some Metabolic Hormones in Barki Ewes Shorn in Autumn as Alternative of Spring Shearing

Taha

Abdel-Khalek

Khalil

et al. 2018

Journal of Animal and Poultry Production

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This study was conducted under the semi-arid desert conditions of the northwest coastal belt of Egypt to evaluate the effect of autumn vs. spring shearing on wool production, some wool traits, physiological responses, thermal gradients, haematological, biochemical parameters and hormonal profile of thyroxin (T4) and cortisol of adult Barki ewes. Results show that autumn shearing reduced (P<0.01) body weight loss; resulted in heavier (P<0.05) greasy fleece weight with lower fiber diameter (P<0.05) and improved the uniformity of wool fiber diameter, point of staple break (P<0.05) and wool staple elongation rate (P<0.01) compared with spring shearing. Spring shearing resulted in higher skin temperature (P<0.05) and thermal gradient between rectal and skin temperature (P<0.01), elevated (P<0.05) serum globulin concentration and declined (P<0.05) albumin/globulin ratio. Serum T4 and cortisol profiles were not affected by shearing in spring or autumn. These results indicated that altering shearing time of Barki sheep from spring to autumn may be safely conducted without negative effects on wool production, physiological responses, blood constituents and animal homeostasis. The reduction in body weight due to shearing suggests the necessity of providing additive food supplementation after shearing to avoid weight loss particularly in autumn.

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Section: Wool Productionmentioning

confidence: 95%

Wool Production and Characteristics, Physiological and Haematological Parameters and Level of some Metabolic Hormones in Barki Ewes Shorn in Autumn as Alternative of Spring Shearing

Taha

Abdel-Khalek

Khalil

et al. 2018

Journal of Animal and Poultry Production

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show abstract

“…Human (2018) also explained that the lower the micron of fibre, the finer the wool. Wool fibres differ in terms of fibre diameter (Deng et al, 2007). The diameter of the wool fibre can vary due to genetics, the breed of sheep and environmental conditions, among other factors.…”

Section: Rjtamentioning

confidence: 99%

“…Longer wool is preferred because it is easy to process and increases wool quality and production (Chisti et al, 2021). The cross-section area of wool fibres along wool length has an impact on the mechanical properties of those fibres; thus, wool fibres are subjected to tensile strength during wool processing, and this may affect the wool fibre cross-section area (Deng et al, 2007;Tandon, 2015). Longer wool results in stronger and smoother yarns, which are easier to handle during the spinning process.…”

Section: 63mentioning

confidence: 99%

An analysis of the wool characteristics that determine wool price in South Africa

Zenda,

Malan,

Geyer

2023

RJTA

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Purpose South Africa’s wool industry plays an important role in the agricultural sector. The wool industry provides a valuable source of income for farmers who practice sustainable farming practices. However, wool farmers face numerous challenges, such as wool contamination, dirty wool and producing good-quality wool. Good-quality wool is determined by fibre diameter, clean yield, vegetable matter and staple length. This study aims to address these challenges. Design/methodology/approach A multiple regression analysis of price (R/kg) of White wool and Merino wool was applied to four variables fibre diameter: vegetable matter, clean yield and staple length. The analysis was based on the data for the 2009–2019 data from Cape Wools auctions. Findings Fibre diameter, clean yield and staple length, with exception of vegetable matter, made a statistically significant contribution to the determination of wool price after all other independent variables were controlled for (p < 0.05). A one-unit (micron) increase in fibre diameter resulted in a 0.404-unit decrease in wool price (R/kg). A one-unit (mm) increase in staple length resulted in a 0.022-unit increase in wool price (R/kg). There was no statistically significant association between vegetable matter and wool price. A one-unit increase in clean yield was associated with a 0.111-unit increase in wool price (R/kg). Research limitations/implications Since wool fleeces consist of the largest portion of wool shorn from sheep, it is important for wool farmers to focus on wool with low fibre diameter, high clean yield percentage, low percentage of vegetable matter content and good length of the wool. Practical implications Since wool fleeces consist of the largest portion of wool shorn from sheep, it is important for wool farmers to focus on wool with low fibre diameter, high clean yield percentage, low percentage of vegetable matter content and good length of the wool. Social implications In a developing country such as South Africa, this study is important for the following reason. It is understanding the wool characteristics that have the most significance influence on the determination of wool price for Merino wool and White wool might effectively help the wool farmers to adapt their production systems to improve the wool characteristics that determine wool price. Originality/value This study identified a need for a study to be conducted on all wool classes.

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Diameter variability and strength scatter of elementary flax fibers

Spārniņš

Andersons

2009

J Mater Sci

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Diameter variations of irregular fibers under different tensions

Cited by 7 publications

References 17 publications

Wool Production and Characteristics, Physiological and Haematological Parameters and Level of some Metabolic Hormones in Barki Ewes Shorn in Autumn as Alternative of Spring Shearing

Wool Production and Characteristics, Physiological and Haematological Parameters and Level of some Metabolic Hormones in Barki Ewes Shorn in Autumn as Alternative of Spring Shearing

An analysis of the wool characteristics that determine wool price in South Africa

Diameter variability and strength scatter of elementary flax fibers

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