40 research outputs found
Discrete Symmetries and Generalized Fields of Dyons
We have studied the different symmetric properties of the generalized
Maxwell's - Dirac equation along with their quantum properties. Applying the
parity (\mathcal{P}), time reversal (\mathcal{T}), charge conjugation
(\mathcal{C}) and their combined effect like parity time reversal
(\mathcal{PT}), charge conjugation and parity (\mathcal{CP}) and \mathcal{CP}T
transformations to varius equations of generalized fields of dyons, it is shown
that the corresponding dynamical quantities and equations of dyons are
invariant under these discrete symmetries.
Abstract Key words- parity, time reversal, charge-conjugation, dyons
Abstract PACS No.- 14.80 Hv
High resolution 148Nd(3He,nÎł) two proton stripping reaction and the structure of the 02 + state in 150Sm
Abstract: Please refer to full text to view abstract
Pharmacological activity of the hydroalcoholic extract from Hovenia dulcis thunberg fruit and the flavonoid dihydromyricetin during hypercholesterolemia induced in rats
Animal-based medicines used in ethnoveterinary practices in the semi-arid region of Northeastern Brazil
Molecular markers as tools for characterization and improvement of tea germplasm
Tea (Camellia sinensis [L.] 0. Kuntze) is one of the
most common non-alcoholic beverages of the world used since ancient times. lndia is the largest producer and exporter of processed tea with over 30% share in global tea production. Thus, tea holds a key position in Indian economy generating over
660 million US dollars of foreign exchange annually.This item was scanned with a HP 4850 Scanjet at 300 dpi and consists of 9 pages
Behaviour of Polynuclear Aryl Sulfonates
A Series of Hexadecyl poly-nuclear 13romatic,Decalin and Tetralin sulfonates have been
synthesized. The CMC, surface & interfacial tension values at various concentrations above and
below CMC both in the aqueous and non-aqueous medium have been determined. The micellar
size, shape, average number of monomers constituting the micelles and thermodynamic properties
have also been estimated. These studies show .that value both in aqueous as well as
Heptane medium decrease with increase in number of arorra . gs in the sulfonates. The size
and shape of these micelles do not change appreciably in Hep e though the ,number of monomers
constituting the micelles change with change of structure of aromatic moiety. The thermodynamic
parameters do not seem to affect the surface active and solubilizing properties even though
the free energy, enthalpy and entropy decrease with the increase in size of aromatic moiety. The
surface and interfacial tension values are the lowest with aqueous and non-aqueous solution of
Hexadecyl Naphthalene sulfonate but these values increase witl1increase in number of aromatic
ring In the sulfonates. The size of the micelles of Hexadecyl Naphthalene sulfonates in aqueous
soll!tions and the number of monomer molecules constituting the micelles is relatively bigger than
other aromatic sulfonates. Although the size of micelles of Hexadecyl Benzanthracene sulfonate
and Hexadecyl Pentacene sUlfonate are comparable yet the number of molecules constituting
these micelles are the least. The solubilization of alkanes in the aqueous solution of Sodium Naphthalene
sulfonate containing electrolyte and iso-butanol is highest but it falls off rapidly with all other
sulfonates. This shows the extreme sensitivity of solubilization towards the structure of sulfonates.
The detergency increases with the increase in size of aromatic moiety in these sulfonates. The
structure thus has profound influence on the surface and micellar properties of the sulfonates.
The studies are important from the point of view of appliqation of synthetic sulfonates as
additives / surfactants in place of petroleum sulfonates.
KEY WORDS
Hexadecyl poly-nuclear sulfonates, aqueous & non-aqueous medium, surface tension and energy,
CMC, micelle, shape and size of micelle, thermodynamic parameter, solubilization, detergency,
viscosity
BEHAVIOUR OF POLYNUCLEAR ARYL SULFONATES
A Series of Hexadecyl poly-nuclear aromatic, Decalin and Tetralin sulfonates have been synthesized. The detergency increases with the increase in size of aromatic moiety in these sulfonates. The structure thus has profound influence on the surface and micellar properties of the sulfonates.
The studies are important from the point of view of application of synthetic sulfonates as additives / surfactants in place of petroleum sulfonates.
KEY WORDS
Hexadecyl poly-nuclear sulfonates, aqueous & non-aqueous medium, surface tension and energy, CMC, micelle, shape and size of micelle, thermodynamic parameter, solubilization, detergency, viscosity