Global Persistence Exponent in Critical Dynamics: Finite Size induced Crossover

We extend the definition of a global order parameter to the case of a critical system confined between two infinite parallel plates separated by a finite distance $L$. For a quench to the critical point we study the persistence property of the global order parameter and show that there is a crossover behaviour characterized by a non universal exponent which depends on the ratio of the system size to a dynamic length scale

Automation in colouration technology to predict dyeing parameters for desired shade and fastness

In this study, dyeing parameters, such as dye conc., sodium sulphide conc., salt conc., and time, have been statisticallyframed through full-factorial design software to generate sets of experimental variables. Cotton has been dyed using all thesesets of variables separately, and then evaluated for respective surface colour strength (K/S), and colour fastness properties,such as fastness to light, washing and rubbing. The outputs thus generated are then analyzed using ANN to generate a bigdata, by which dyer can predict any shade. This will help in eliminating the rigorous laboratory trials and forecasting colourstrength & quality of dyeing well before the dyeing process is materialized. The whole data sets are then uploaded in cloudcomputing to enable to acquire the data. It is observed that by assigning diffent values of K/S on cloud, the dyeingparameters can be obtained to achieve desired output in further applicatio

Automation in colouration technology to predict dyeing parameters for desired shade and fastness

450-458In this study, dyeing parameters, such as dye conc., sodium sulphide conc., salt conc., and time, have been statistically framed through full-factorial design software to generate sets of experimental variables. Cotton has been dyed using all these sets of variables separately, and then evaluated for respective surface colour strength (K/S), and colour fastness properties, such as fastness to light, washing and rubbing. The outputs thus generated are then analyzed using ANN to generate a big data, by which dyer can predict any shade. This will help in eliminating the rigorous laboratory trials and forecasting colour strength & quality of dyeing well before the dyeing process is materialized. The whole data sets are then uploaded in cloud computing to enable to acquire the data. It is observed that by assigning diffent values of K/S on cloud, the dyeing parameters can be obtained to achieve desired output in further application

Dyeing of cotton with sulphur dyes using alkaline catalase as reduction catalyst

Attempts have been made to dye cotton with alkaline catalase to observe if sodium sulphide can be replaced with it. It is observed that the alkaline catalase is too capable of developing comparable dyebath potential, dye receptivity on cotton, reduction bath stability as well as colourfastness of dyeings as obtained in sodium sulphide based reducing systems

Synthesis, characterization and application of eco-friendly lavender oil microcapsules on cotton

In this study, lavender oil microcapsules have been synthesized, characterized and then applied on cotton fabric throughpadding followed by drying and curing. The treated samples are evaluated for wash fastness, tensile strength, stiffness, andthe most important, release rate from treated fabric. Most of the synthesized microcapsules are found in the range of10-30 microns. Cross-linking with DETA shows improvement in the shell morphology with slow release of lavender fromtreated fabric. Stiffness of the treated fabric increases proportionately with increase in concentration of microcapsules withsimultaneous fall in strength

Finite Size Effect in Persistence

We have investigated the random walk problem in a finite system and studied the crossover induced in the the persistence probability scales by the system size.Analytical and numerical work show that the scaling function is an exponentially decaying function.The particle here is trapped with in a box of size $L$ . We have also considered the problem when the particle in trapped in a potential. Direct calculation and numerical result show that the scaling function here also an exponentially decaying function. We also present numerical works on harmonically trapped randomly accelerated particle and randomly accelerated particle with viscous drag.Comment: revtex4, 4 pages, 4 figure

Temperature dependence of spin polarizations at higher Landau Levels

We report our results on temperature dependence of spin polarizations at $\nu=1$ in the lowest as well as in the next higher Landau level that compare well with recent experimental results. At $\nu=3$, except having a much smaller magnitude the behavior of spin polarization is not much influenced by higher Landau levels. In sharp contrast, for filling factor $\nu=\frac83$ we predict that unlike the case of $\nu=\frac23$ the system remains fully spin polarized even at vanishingly small Zeeman energies.Comment: 4 pages, REVTEX, and 3 .ps files, To be published in Physical Review Letter

Dyeing of cotton with vat dyes using alkaline catalase alongwith iron(II) salt

109-115In this study, attempts have been made to replace sodium hydrosulphite with alkaline catalase in combination with iron (II) salt for dyeing cotton with vat dyes. The results show that alkaline catalase with iron (II) salt is quiet effective and capable of substituting sodium hydrosulphite with comparable dye strength and colour fastness. While reduction potential values of dyebaths are found to be almost same in both hydrosulphite and alkaline catalase along with iron(II) salt systems, the stability of the baths in absence and presence of dye is found superior in the new reduction system as compared to those in hydrosulphite system. Dye strength results show mixed findings, i.e. for some dyes, dye strength is higher in new reduction system, while for rest of the dyes, it is higher in hydrosulphite system

Dyeing of cotton with vat dyes using alkaline catalase alongwith iron(II) salt

In this study, attempts have been made to replace sodium hydrosulphite with alkaline catalase in combination with iron(II) salt for dyeing cotton with vat dyes. The results show that alkaline catalase with iron (II) salt is quiet effective andcapable of substituting sodium hydrosulphite with comparable dye strength and colour fastness. While reduction potentialvalues of dyebaths are found to be almost same in both hydrosulphite and alkaline catalase along with iron(II) salt systems,the stability of the baths in absence and presence of dye is found superior in the new reduction system as compared to thosein hydrosulphite system. Dye strength results show mixed findings, i.e. for some dyes, dye strength is higher in newreduction system, while for rest of the dyes, it is higher in hydrosulphite system

Imparting anti-shrink functionality to wool by individual and simultaneous application of keratinase and papain

In this study, a pure enzymatic process has been used to impart anti-shrink properties to wool using keratinase and papain applied individually and simultaneously. Both the enzymes have shown to reduce the shrinkage tendency when applied individually, but combined application results in minimum shrinkage. Along with the reduction in shrinkage tendency it is desired to keep the loss in tensile strength to a low level. It is found that the loss in tensile strength could be kept below 10%. The effect of enzyme treatment on other properties like dyeability, wash fastness, light fastness and moisture regain is also studied. SEM study shows that the maximum scale removal is obtained when both the enzymes are applied simultaneously. When the two enzymes are applied individually, papain shows higher efficacy in terms of scale removal than that with keratinase. Infrared spectrophotometric studies using FTIR show that there is no difference in the absorption bands observed in the IR spectra, thus indicating that the enzyme treated wool is not chemically altered, i.e. no new functional groups are introduced in the wool as a result of the enzyme treatment