Study on volumetric and acoustic properties of binary mixtures of p-Cymene with fluorobenzene, chlorobenzene and bromobenzene at various temperatures

Volumetric and acoustic properties of p-cymene with fluorobenzene, chlorobenzene and bromobenzene have been investigated using density, (ρ), and speed of sound, (U) measurements over the entire composition range at T= (303.15, 308.15 and 313.15) K. From the experimentally measured density, (ρ); Excess molar volumes, (V), infinite dilution partial molar volume, (, i) excess partial molar volume, (,) apparent molar volume, (V,m,ϕ, 1), infinite dilution apparent molar volume, (V, , ϕ, 1) with empirical parameters, Sv, Bv and limiting apparent molar expansibility, (E) have been calculated. Deviation in speed of sound (U), deviation in isentropic compressibility, (ks), deviation in acoustic impedance, (z), infinite dilution partial molar isentropic compressibility, (,m, i), excess partial molar isentropic compressibility, (,i), apparent molar isentropic compressibility, (Ks,m,ϕ,i), infinite dilution apparent molar isentropic compressibility, (Km,ϕ,1) with empirical parameters Sk and Bk and intermolecular free length (Lf) have been calculated using experimentally measured speed of sound, (U). To derive fitting coefficients, (Ai) with standard deviation, (σ), excess properties were fitted to the Redlich-Kister type polynomial equation. Various theoretical speed of sound and average deviations have been calculated using well established equation like Nomoto, (Unmt) Ideal Mixing Rule, (Uimr) Junji, (Ujunji) and Jacobson’s Free Length Theory, (Uflt). The variation of these properties with composition and temperature has been discussed in terms of molecular interaction on mixing and their interacting abilities have also been compared

Environmentally benign un-catalyzed esterification of alcohols under solvent-free condition using acetyl chloride.

A general and practical route for un-catalyzed esterification of alcohols using acetyl chloride is described under solvent free and energy efficient conditions. Excellent yields, wide applicability to various alcohols, mild reaction conditions, short reaction time, ease of operation makes this method economic and environmentally benign. Keywords: Esterification, un-catalyzed, solvent-free, acetyl chloride, alcohol

PHARMACOGNOSTICAL AND ANTIMICROBIAL STUDIES OF THE STEM OF TABERNAEMONTANA DIVARICATA LINN

Objective: The aim of the present study is to evaluate the pharmacognostic and antimicrobial studies of Tabernaemontana divaricata Linn. Stem.Methods: The Pharmacognostical studies were performed using standard parameters and antimicrobial studies were based on checker board and disc diffusion technique using various bacterial strains. The antifungal studies were based on the agar slant technique.Results: The transverse section shows the presence of undifferentiated cells known as cortex in the outer region. They are followed by an extended part of cortex, which consists of 7-8 layers of Phellogen, followed by 6-7 layers of Phelloderm. The antimicrobial studies confirmed that the methanolic extract was quite effective for bacterial strains Sh. flexneri type BCH 995, Shigella boydii 8, Sh. sonnei NK 840, Sh. dysenteriae 1, Sh. dysenteriae 9, Vibrio cholerae 1023, V. cholerae 1341, V. cholerae 575, V. cholerae 1311, E. coli RH 07/12, E. coli 18/9, E. coli K88, Enterobacter spp AP596, Staphylococcus aureus ML 267, S. aureus MTCC 96, Bacillus subtilis MTCC 441, Pseudomonas auriginosa AP585 NLF, Bacillus pumilus 8241 and Klebsiella pneumoniae. The maximum antibacterial activity was observed against Staphylococcus aureus MTCC 96 (zone of inhibition at 800µg/ml is 12.17±0.124 mm), whereas minimum activity against E. coli RH 07/12 (zone of inhibition at 800µg/ml is 10.45±0.063 mm). It was also effective against the fungal strains Aspergillus niger MTCC 281, Candida albicans ATCC 10231 and Penicillium chrysogenum MTCC 2725.Conclusion: The study of pharmacognostical features of the stem of T. divaricata Linn. May serves as a tool for identification and standardization of the crude drug as per WHO guidelines.Â

Analytical Study of Modified RSA Algorithms for Digital Signature

Digital signature has been providing security services to secure electronic transaction. Rivest Shamir Adleman (RSA) algorithm was most widely used to provide security technique for many applications, such as e-mails, electronic funds transfer, electronic data interchange, software distribution, data storage, electronic commerce and secure internet access. In order to include RSA cryptosystem proficiently in many protocols, it is desired to formulate faster encryption and decryption operations. This paper describes a systematic analysis of RSA and its variation schemes for Digital Signature. DOI: 10.17762/ijritcc2321-8169.15031

Correlation of body mass index, waist circumference and waist-hip ratio to fasting blood sugar levels in non-diabetics: an observational study

Background: Obesity is a serious health problem across the world. Obesity is an independent risk factor for diabetes and cardiac problems. Waist-hip ratio and waist circumference are better predictors of obesity and associated medical risks. The aims and objectives of study are to evaluate overweight and obesity in non-diabetics and assess correlation of BMI, WC and WHR with fasting blood sugar (FBS).Methods: A prospective study was carried out at D.Y. Patil Hospital Nerul, Navi Mumbai between November 2014- December 2014. Subjects attending the medical outpatient department (OPD) were invited to participate in this study. 200 subjects were screened, of whom 100 subjects having fasting sugar levels less than 110 mg/dL were enrolled. The subjects were matched with respect to age, BMI, waist circumference and Hip circumference and W: H ratio. BMI, WC and W:H ratio was correlated with FBS using Pearson’s correlation coefficient. Statistical significance was considered at P value<0.05.Results: It indicated 19.6% males (10/51) and 14.28% females (7/49) were overweight and 47.05% males (24/51) and 42.85% females (21/49) were obese according to BMI. 13.72% males (7/51) and 20.40% females (10/49) were overweight and 66.66% males (34/51) and 38.77% females (19/49) were obese according to WC. 5.88% males (3/51) and 4.08% females (2/49) were overweight and 94.11% males (48/51) and 91.83% females (45/49) were obese according to WHR.Conclusions: It can be concluded from this study that there is a positive correlation between BMI, Waist circumference, Waist: Hip Ratio and are important indicators of obesity to predict obesity

A Role of Semantic Web and Ontology in Information Retrieval

Web Mining is an application of data mining which focuses on discovering relevant data from Web content. The Semantic Web describes a web as data rather than documents. It characterizes information in understandable manner moreimplicitly for humans and computers.It wasdeveloped with the help of Ontology, which is the pillar of the Semantic Web. The semantic Web depends on integration and use of semantic data, and sematic data is depends on ontology. Ontology can provide a common vocabulary, a grammar for publishing data, and can supply a semantic d data which can be used to preserve the Ontologies and keep them ready for inference. This also helps in personalized filtering mechanisms for users to consume relevant, interesting information from web sites. By combining web mining and sematic web, we can retrieve relevant data called as semantic web mining. This paper gives an overview of sematic web mining and their applications

Fundamental Magnetic Properties and Structural Implications for Nanocrystalline Fe-Ti-N Thin Films

The magnetization (M) as a function of temperature (T) from 2 to 300 K and in-plane field (H) up to 1 kOe, room temperature easy and hard direction in-plane field hysteresis loops for fields between -100 and +100 Oe, and 10 GHz ferromagnetic resonance (FMR) profiles have been measured for a series of soft-magnetic nano-crystalline 50 nm thick Fe-Ti-N films made by magnetron sputtering in an in-plane field. The nominal titanium concentration was 3 at. % and the nitrogen concentrations (xN) ranged from zero to 12.7 at. %. The saturation magnetization (Ms) vs. T data and the extracted exchange parameters as a function of xN are consistent with a lattice expansion due to the addition of interstitial nitrogen in the body-centered-cubic (bcc) lattice and a structural transition to body-centered-tetragonal (bct) in the 6-8 at. % nitrogen range. The hysteresis loop and FMR data show a consistent picture of the changes in both the uniaxial and cubic anisotropy as a function of xN. Films with xN > 1.9 at. % show an overall uniaxial anisotropy, with an anisotropy field parameter Hu that increases with xN. The corresponding dispersion averaged uniaxial anisotropy energy density parameter = HuMs/2 is a linear function of xN, with a rate of increase of 950 erg/cm3 per at. % nitrogen. The estimated uniaxial anisotropy energy per nitrogen atom is 30 J/mol, a value consistent with other systems. For xN below 6 at. %, the scaling of coercive force Hc data with the sixth power of the grain size D indicate a grain averaged effective cubic anisotropy energy density parameter that is about an order of magnitude smaller that the nominal K1 values for iron, and give a quantitative vs. D response that matches predictions for exchange coupled random grains with cubic anisotropy.Comment: 13 pages, 7 figure