Various acoustic parameters like isentropic compressibility (â_s), intermolecular free length (L_f) , apparent molar compressibility (ö_k), molar compressibility(w) , molar sound velocity (R) , acoustic impendence (Z) of CdBr₂ electrolyte in 5% , 10%, 15%, and 20% aqueous blood serum media at 303.15 K have been determined from ultrasonic velocity (U), density(ñ) and relative viscosity (ç_r ) studies of the solutions. These parameters are found to be related to the molar concentration of the electrolyte in solutions. The results are interpreted in terms of most probable mechanism involving structure breaking of the solute in the solvent.

In this paper, temperature dependent phase behavior of pseudo-ternary Triton X-100+1-hexanol (1:5 molar ratios)/ oil/ water systems is reported. The influence of nature of hydrocarbon oil and type of electrolytes (weak as well as strong) has been investigated on the temperature induced phase behavior of the ternary system. At surfactant concentration, f_s = 40%, a "nose-shaped" microemulsion region is observed. Below one-phase microemulsion region, Lá phase appears. The presence of NaCl and oxalic acid has opposite effect on the domain size of the micellar region. The presence of NaCl decreases the domain size of 1f micellar region whereas oxalic acid first decreases the domain below f_w<18 and then increases above f_w >18 in the lower boundary of the phase diagram. The critical weight fraction of water, f_w^cri decreases in presence of both electrolytes. However, f_w ^max increases in presence of oxalic acid and remains constant in presence of NaCl as compared to salt free system. Furthermore, when cyclohexane was replaced by a longer straight chain hydrocarbon, dodecane, the domain of the one-phase microemulsion region is tremendously increased.
 

A novel sample inorganic ion exchanger tin(IV) arsenite has been synthesized and characterized by determining exchange capacity, distribution coefficient of different metal ions of analytical importance, chemical composition studies electrolyte impact on ion exchange capacity, effect of hydrated ionic radii on ion exchange, IR and TGA studies. The exchanger column was used for the separation of binary mixtures of environmental significance.
 

Beackea Frutescens comes in the family of Mrytaceae and is well known aromatic and medicinal herb. In view of this it is more economical to grow and commercialize this product instead of importing other source of similar chemical properties such tea tree. Based on this study found that Beackea Frutescens sample emulsion of 54% (CTAB:Tween 80): 6% Benzil Alkohol: 40% H₂O with five drops of Beackea Frutescens's essential oil had produced in form of liquid crystal gel. This gel is said to be very effective and suitable to make a cosmetic product because the structure that similar to skin cell and facilitate to seeped into skin.
 

The reaction of ethylenediamine with r(2), c(6)- diphenyl Piperidin-4- one gave the condensed product. The IR, ¹H NMR, ¹³C NMR and two dimentional NMR [HMQC] spectrum of the product shows that the product is 7,9-diphenyl-1,4,8-triazaspiro (4.5) decane. The coupling constants are J_a,a = 11.2 Hz and J_a,e =2.2Hz. These values point out that the six member piperidine ring in the compound adopts a chair conformation with the phenyl substituent in the equatorial position.

A kinetic study of oxidation of catechol has been investigated in presence and absence of a cationic micelle, cetyl pyridium bromide (CPBr). It is observed that the rate was rapidly increased in the presence of surfactant. The rate was independent of the initial concentration of CAT, both in the presence and absence of surfactant. A first order kinetics is observed with respect to [CAT], both in presence and absence of micelle. Activation parameters for the reaction are evaluated and the plausible mechanism is suggested.
 

Low-valent organometallic derivatives of palladium(0) and platinum(0) with 4-amino-5-mercapto-3-substitution-1,2,4-triazole have been isolated from displacement reaction of M(p₃)₄ (M=Pd/Pt) and Rh(pf₃)₃ Cl with methyl and ethyl substitution of ligand in benzene medium. Oxidation state of metals in these compounds is determined iodometrically. Most probable tetrahedral structure for Pd(0) and Pt(0) have been assigned using various physico-chemical data. Metal-ligand vibrations in the far-infrared spectra of complexes have been reasonably assigned.

Three simple and sensitive visible spectrophotometric methods (A, B & C) for the determination of Lornoxicam (LOC) in bulk and pharmaceutical dosage forms are described. They are based on the formation of colored species by Redox reaction with Folin-Ciocalteau (FC) phenol's reagent under alkaline conditions (method A; ë_max 700 nm) or oxidation followed by complex formation with 1,10- Phenanthroline (PTL) in presence of Ferric Chloride (method B; ë_max 510 nm) or oxidative coupling of the drug with 3-methyl- 2-Benzothiazolinone Hydrazone HCl (MBTH) in the presence of Sodium meta periodate (method C; ë_max 620 nm). These methods were extended to the analysis of pharmaceutical formulations and results compared with the reference method.
 

Some complexes of Pd(II) with 1-substituted phenyl-tetrazoline-5-thione have prepared at different pH (2-3, 7 & 8) & characterised using different physico-chemical data. The I.R. & `Hnmr spectral data are consistent with assigned tentative structures.
 

Some solid and air stable complexes of 1,2,4-Trizole-3(5) thiol with oxo vanadium (IV) and oxo Zirconium (IV) ions have been prepared in various media and characterized using various physico-chemical methods. The ligand is coordinated to metal ion through thione sulphur as indicated by ir spectra . Octahedral geometry has been proposed for the complexes on the basis of normal coordinate analysis, magnetic susceptibility and electronic spectral studies.