9 research outputs found
Tensile properties of turmeric fibre reinforced polyester composites
324-329Turmeric fibre has been extracted from the stem and petiole of Tekurpeta
and Cuddapha turmeric (Curcuma longa) and then used for the preparation
of turmeric fibre reinforced polyester composites. For enhancing the bonding
between fibre and matrix, one set of turmeric fibres is chemically treated with
NaOH, KMnO4 and H2SO4 while another set is
treated with only NaOH at varying chemical concentration and treatment time.
The composites of Cuddapha turmeric stem fibre treated with 0.25 M NaOH for 13 h (CT-4
treatment) and Tekurpeta turmeric stem fibre treated with 0.125 M NaOH for 45
min, 0.01265 M
KMnO4 for 5 min and 0.0000075 H2SO4 for 5 min
(CT-1 treatment) show the highest tensile strength (36.01 MPa) for CT-4 and tensile
modulus (744.32 MPa) for CT-1. The density of the composites shows decreasing
trend with the increase in volume fraction of fibre in all the cases; density
of Cuddapha turmeric composites being 956.77 kg/m3 the lowest among
all the other composites studied at maximum volume fraction of fibre
Not Available
Not AvailableTwelve sweet sorghum genotypes were evaluated for seed germination and vigour traits under accelerated ageing and natural storage conditions to examine the genetic variation, heritability and correlation. Loss in seed germination, field emergence and seedling vigour were more due to accelerated ageing than natural storage. Seedling vigour showed moderate values of phenotypic and genotypic coefficients of variation, high values of heritability (h2-bs) and moderate to high values of genetic advance over mean of fresh, aged and stored seeds. Genotypic and phenotypic correlations explained the extent of association among the seed physiological traits.Not Availabl
Not Available
Not AvailableTwelve sweet sorghum genotypes were evaluated for seed germination and vigour traits under accelerated ageing and natural storage conditions to examine the genetic variation, heritability and correlation. Loss in seed germination, field emergence and seedling vigour were more due to accelerated ageing than natural storage. Seedling vigour showed moderate values of phenotypic and genotypic coefficients of variation, high values of heritability (h2-bs) and moderate to high values of genetic advance over mean of fresh, aged and stored seeds. Genotypic and phenotypic correlations explained the extent of association among the seed physiological traits.Not Availabl
Not Available
Not AvailableTwelve sweet sorghum genotypes were evaluated
for seed germination and vigour traits under accelerated
ageing and natural storage conditions to examine the
genetic variation, heritability and correlation. Loss in seed
germination, field emergence and seedling vigour were
more due to accelerated ageing than natural storage.
Seedling vigour showed moderate values of phenotypic and
genotypic coefficients of variation, high values of heritability
(h2-bs) and moderate to high values of genetic
advance over mean of fresh, aged and stored seeds.
Genotypic and phenotypic correlations explained the extent
of association among the seed physiological traits.Not Availabl