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The aim of this work is to determine the effect of draft ratio and twist level on core visibility ratios of dual-core yarns. For this aim, different types dual-core yarns containing PET/Elastane were produced under controlled conditions. To objectively evaluate the visual quality of the dual-core yarns, the frequency of the core filaments appearing on the yarn surfaces was counted on dyed knitted fabrics produced with these yarns by using image processing algorithm. The results showed that the draft ratio and the twist coefficient were the important factors influencing the core visibility ratios of dual-core yarns. It was found that the core covering performances of the pre-treated dual-core yarns produced with the lowest twist coefficient in the study were more incomplete than the others. Moreover, it was seen that the higher draft ratio on PET filament led to well wrapping of sheath staples to core filaments for dual-core yarns. [ABSTRACT FROM AUTHOR]

Abstract: Angiotensin-converting enzyme (ACE) gene polymorphism has been associated with increased incidence of stroke in some populations, although contradictory results have been reported. The aim of this study was to determine the allelic frequency and the genotypic distribution for ACE gene polymorphism in Turkish patients with ischemic stroke compared to appropriate healthy controls and to correlate the genetic findings with stoke type. One hundred and eight patients with ischemic stroke versus 79 healthy controls were studied for the presence of ACE gene polymorphism detected by PCR. Genotypes were defined as DD, II and ID according to the presence of the D (deletion) and I (insertion) alleles. There was no statistically significant difference in either the genotypic distribution or allelic frequency between the patients versus healthy controls (χ 2 =0.105; df =1; p =0.430). There was also no significant difference for ACE genotype distribution and allelic frequency within the stroke group classified according to Bamford criteria (χ 2 =4.827; df =3; p =0.185). Our data supports lack of association between DD genotype and/or D allele and ischemic stroke or subtypes of ischaemic stroke in the Turkish population. [Copyright &y& Elsevier]