Nematic - Isotropic Transition in Porous Media - a Monte Carlo Study

We propose a lattice model to simulate the influence of porous medium on the Nematic - Isotropic transition of liquid crystal confined to the pores. The effects of pore size and pore connectivity are modelled through a disorder parameter. Monte Carlo calculations based on the model leads to results that compare well with experiments.Comment: 11 pages; 4 figure

Granular Trenches and Stone Columns as Ground Improvement Techniques — Case Histories of Field Applications

Vast areas of Deposits of Soft clays and loose sands is a common occurrence generally in all the countries particularly in the Coastal towns of the State of Andhra Pradesh, India. The utility of these deposits for founding structures becomes vital in view of the enormous land cost and their existence in developed areas. The structures resting on these deposits will be subjected to many problems as these deposits possess very low insitu strength. Appropriate ground improvement technique, supported by quality assurance tests after implementation of technique in the field will be a better solution in problematic soils. The paper aims in presenting the field applications of Granular Trenches and Stone Columns for the construction of Bus stations at three different regions

FORMULATION AND EVALUATION OF ACECLOFENAC PRONIOSOME LOADED ORABASE FOR MANAGEMENT OF DENTAL PAIN

Objective: The main motive is to develop proniosomes loaded orabase for enhanced permeation and prolonged release of aceclofenac for oro dental conditions.Methods: Various aceclofenac (ACL) proniosomal gels were formulated employing various surfactants, span 60 was superior and significant for loading into orabase. The formulations were scrutinized for entrapment efficiency, optical microscopy, in vitro diffusion and release studies, mucoadhesive strength, ex-vivo permeation studies and drug-excipient interactions were determined by FTIR spectroscopy.Results: Considering best entrapment efficiency with span 60 (97.60±1.85) and optimum vesicle shape, along with prolonged drug permeation (45% for 24 h) the formulation F(ACL)1 was selected and optimized for loading into orabase. The F(ACL)1 loaded orabase exhibited significant prolonged release over 14 h, and permeation profiles exhibited nearly two-fold increased flux in comparison with control. Good mucoadhesive strength was observed for proniosomal orabase 6370 dynes/cm2. No evidence of incompatibility amongst formulation components from FTIR studies. SEM images revealed the particle size range from 136 µm to 236 µm for proniosomal orabase.Conclusion: Orabase can be an effective carrier for proniosomes with enhanced permeation and prolonged release for oro-dental conditions

UV Raman and Fluorescence for Multi-Species Measurement in Hydrocarbon-Fueled High-Speed Propulsion

This report documents work performed through the NASA Graduate Student Researchers Program, Grant No. NGT3-52316. Research performed included investigation of two-line fluorescence imaging of OH for temperature measurement and an investigation of negative flame speeds for modeling of premixed turbulent flames. The laboratory work and initial analysis of the fluorescence imaging was performed at NASA Glen Research Center with follow up analysis at Vanderbilt University. The negative flame speed investigation was performed using an opposed jet flow simulation program at Vanderbilt University. The fluorescence imaging work is presented first followed by the negative flame speed investigation

Wide hybridization in Arachis: problems and prospects

The genus Arschis includes a large number of apdu including A. hypoped, the groundnut. The species are grouped into men wctions. A. hypog@ad. a tetraploid, can be crowed only with the sped08 within its own ssction, Amchis, even though most of them arr diploids. From the diploid species resistances are being trms?md to A. hypogma. Investigations on barriers to hybridization betwoen sections have been initiated at ICRISAT. Soms techniques have bean dmloped to break the barriers. After incompatible poll~nations betw*en A. h-1) or A. monticols and species in section Rhiromatosw. fluoremncrr microscopic investigation reveals that some inhibition of pollen tubs growth occurs in the style. However, pollen tubes can be soen at the base of the pistils. In very few instances pegs do develop but do not elongate further than 1 cm and degenerate before they can penetrate the mil and form pods. Applications of growth hormones to the bases of incompatibly pollinated flowers just afm pollination significantly in~asedth e number of peg6 produced from about 10 percent (untreated) to mom than 60 percent (hormone treated) of pollinations. Hormones were clp~li~sdin gly or in combination. or in sequencr. GA3 induced moat pep. but thou died bdorr aoda weto formed. A wbowuent treatment with kinetin maintained peg growth to a stage at which embryo$ could k disuc?ed from immrturo pods and succe#fuliy cubrod in virt

Recovery of Coal fines from Rejects by Column Flotation

Investigations were carried out using column flotation to recover coking coal fines from the tailings generated at flotation plant of one of theoperating washeries. Columns of different diameter designed and developed by RRL, Bhubaneswar were used in these studies. Washabilitiy studies indicated that the tailings have the potential to yield 60% of clean coal at 15.0% ash level. Flotation studies in cell indicated thata product with 16% ash can be obtained at 50% yield from these tailings. Results of column flotation had indicated that the performance of column is superior to cell and close to washability data. Most of the coal values being rejected presently can be recovered by using theflotation column. The results obtained by 100 mm and 220 mm diameter laboratory columns could be reproduced on pilot column of 1000 mm diameter, confirming the validity of design and scale up criteria

Weak Transversality and Partially Invariant Solutions

New exact solutions are obtained for several nonlinear physical equations, namely the Navier-Stokes and Euler systems, an isentropic compressible fluid system and a vector nonlinear Schroedinger equation. The solution methods make use of the symmetry group of the system in situations when the standard Lie method of symmetry reduction is not applicable.Comment: 23 pages, preprint CRM-284

The Use Of In Vitro Techniques In Groundnut Improvement

Genetic improvement of crops by utilization of characters from wild species, which often have desirable traits not present in the cultivated forms, has been the subject of serious attention. The interspecific transfer of genes has not always been simple and straightforward because of reproductive barriers and genetic incompatibility. This is true in the genus Arachis where a number of species have been identified as sources of resistance to fungal and viral pathogens as well as to insect pests (1 1. A few species have been crossed with A. hypogaea and their derivatives produced (1 - 41, but there are 'l; number of species which are not crossable with oundnut (5). This limits the scope for crop improvement, and the sS. tuation necessitates the adoption of existing methods, or develop- ment of new ones for the production of hybrids following these desirkle wide crosses