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Chairat, M.,Bremner, J.B.,Chantrapromma, K. The Korean Fiber Society 2007 Fibers and polymers Vol.8 No.6
The extracted dye from the dried fruit hulls of mangosteen was used as a natural dye for the dyeing of cotton and silk yam. The optimal conditions for dye extraction were to extract the dried fruit hulls of mangosteen at $80^{\circ}C$ for 1 hour with a 15 % w/v citric acid solution in a 1:4 ratio of mangosteen powder to solvent. Cotton dyeing with the extracted dye from the dried fruit hulls of mangosteen was carried out at $60^{\circ}C$ for 60 minutes with a material to liquor ratio of 1:25. The effect on dyeing of mordant type with different mordanting methods was studied. The results showed that the dyeing of cotton using the post-mordanting method with ferrous sulfate and calcium hydroxide not only provided better depth of shade but also provided better wash fastness and light fastness than with other mordants (alum; zinc tetrafluoroborate) or without a mordant. Good fastness properties were also obtained using a post-mordanted silk with calcium hydroxide.
Ban, Keun-Yong,Kim, Yeongho,Kuciauskas, Darius,Bremner, Stephen P,Honsberg, Christiana B Institute of Physics 2016 Semiconductor science and technology Vol.31 No.12
<P>The optical properties of InAs quantum dots (QDs) embedded in a GaAsSb matrix with different delta (<I>δ</I>)-doping levels of 0, 2, 4, and 6 electrons per dot (e<SUP>−</SUP>/dot), incorporated to control the occupation of QD electronic states, are studied by photoluminescence (PL) spectroscopy. The time-resolved PL data taken at 10 K reveal that the increase of <I>δ</I>-doping density from 2 to 6 e<SUP>−</SUP>/dot decreases the recombination lifetime of carriers at ground states of the QDs from 996?±?36 to 792?±?19 ps, respectively. Furthermore, the carrier lifetime of the sample with 4 e<SUP>−</SUP>/dot is found to increase at a slower rate than that of the undoped sample as temperature increases above 70 K. An Arrhenius plot of the temperature dependent PL intensity indicates that the thermal activation energy of electrons in the QDs, required for carrier escape from the dot ground state to continuum state, is increased when the <I>δ</I>-doping density is high enough (>4 e<SUP>−</SUP>/dot). These results are attributed to the enhanced Coulomb interaction of electrons provided by the <I>δ</I>-doping, leading to reduced thermal quenching of the PL.</P>
DNA-PK Promotes the Mitochondrial, Metabolic, and Physical Decline that Occurs During Aging
Park, Sung-Jun,Gavrilova, Oksana,Brown, Alexandra L.,Soto, Jamie E.,Bremner, Shannon,Kim, Jeonghan,Xu, Xihui,Yang, Shutong,Um, Jee-Hyun,Koch, Lauren G.,Britton, Steven L.,Lieber, Richard L.,Philp, And Elsevier 2017 Cell metabolism Vol.26 No.2