305 research outputs found
Dynamics of finite-sized light spheres in turbulence
No full textWe report experimental results on the Lagrangian dynamics of finite-size light particles in turbulence. Using an orthogonal camera setup and 3D particle tracking, we study the velocity and acceleration statistics of rigid light spheres in a water tunnel with nearly homogeneous and isotropic turbulence. The Reynolds number (ReY) is varied from 180 to 300, and the study covers a range of size ratios (4 < D/η < 16) for marginally light spheres. We find that the normalised acceleration PDF decreases in intermittency with increasing size ratio - in qualitative agreement with the predictions of the Faxén corrected model. We also present preliminary results on the rotational dynamics of large light spheres in turbulence
High Ash Indian Coals: Gasification Strategy
No full text24-27To move towards cleaner energy production mechanism and to attain energy security for the country, while utilising the potential of Indian coals, gasification technology seems to be a promising option
Screening and characterization of bacteriocinogenic lactic acid bacteria from intestinal sources
No full textThis Dissertation / Report is the outcome of investigation carried out by the creator(s) / author(s) at the department/division of Central Food Technological Research Institute (CFTRI), Mysore mentioned below in this page
Synthesis of solvothermal derived TiO2 nanocrystals supported on ground nano egg shell waste and its utilization for the photocatalytic dye degradation
No full textTiO2 nanoparticles with excellent crystallinity were synthesized via solvothermal method and supported on the ground nano-sized egg shell waste at different loading concentrations. The photocatalytic degradation of the mixture of Methylene blue (MB) and Rhodamine 6G (Rh 6G) in aqueous solution utilizing prepared TiO2 nano composite under visible light irradiation was analysed. Different characterizations including UV–Visible (UV–Vis) spectroscopy, Field emission scanning electron microscopic (FE-SEM), energy dispersive studies (EDS), Transmission electron microscopy (TEM) were performed to investigate the physicochemical properties of the prepared catalyst. In addition, FE-SEM and EDS analysis of the prepared egg shell support were carried out to confirm the morphology, particle size distribution, and composition. The solvothermal derived TiO2 nanocrystals supported on ground nano-sized egg shell waste exhibited enhanced photocatalytic activity as compared to the as-prepared TiO2 nanoparticles. The synergistic effect of TiO2 nanoparticles and nano egg shell support is attributed to the effective dispersion of TiO2 that offers high specific surface area
Petrographic and chemical reactivity assessment of Indian high ash coal with different biomass in fluidized bed co-gasification
No full textThe reactivity of coal and biomass has been evaluated by comparing the optical and chemical changes in feed material prior and after the co-gasification. The proximate, ultimate, GCV, low-pressure N2 sorption isotherm, micropetrography, SEM and EDX spectroscopy analyses are carried out to assess the reactivity of blends of high ash Indian coal and biomass. The relative changes in parameters like surface area, pore size, and pore volume have been correlated with reacted percentage area of coal macerals and cellulose-lignin cellular structures of biomass. The Optimas image processing software is being used to mark the reacted portion of organic constituents and calculated the reactivity percentage. The bottom ash of pure coal has shown the least reacted organic matters, indicating inefficiency of high ash coal due to a large amount of inorganic and inertinite contents that is resisting the oxidation. The reactivity percentage is determined by the petrographic and SEM images, and varies from 36.34 to 99.64% and 6.61–96.22%, respectively. It is summarised that the estimation of percentage alteration of macerals and other micro-organic constituents can be used as one of the practical approaches for the assessment of the reactivity of coal and biomass. The blending ratio 6:4 of coal and press mud has shown the highest reactivity (>99.64%). The values of petrographic and SEM reactivity have shown good correlations with the carbon contents, unreacted vitrinites, mineral matters and biomass remnants. These relations have been taken into account to formulate the proposed petrographic empirically calculated reactivity (RPEC). The focus has also been made to investigate the influence of feed composition on carbon conversion and heating value of the product gas
Co-gasification of coal and biomass an emerging clean energy technology: Status and prospects of development in Indian context
No full textCo-gasification of coal and biomass is emerging as potential clean fuel technology to achieve high thermodynamic efficiency with relatively low CO2 emission. The coal and biomass have been exclusively gasified more than a century to obtain gas–liquid fuels and the production of chemicals. Co-gasification has higher efficiency than the solitarycoal gasification because the cellulose, hemicellulose and lignin content of biomass help to ignite and enhance the rate of gasification. It is suggested that the extensive research on carbon reactivity pattern, heat release, reaction kinetics, etc. may support to reduce the uncertainties in the co-gasification performance of coal and biomass blends, particularly in India. The prospects of co-gasification technology in Indian context have been discussed considering the abundance of varieties of coal and biomass. The suitability of existing gasifier procedures and their limitations with operating parameters like temperature, residence time, density optimisation, feed rate, agglomeration intensity, the tar formation and techno-economics involved are described. Also, this paper reviews the research highlights of the history of co-gasification and the advancement in upcoming challenges like a design of gasifier, access and preparation of biomass, disposal of residue, environmental concerns and reassurance to the operators for execution of large and small-scale projects
Re-Envisioning Chandigarh: Role of urban peripheries in formation of metropolitan regions in the case of chandigarh and its surrounding region
No full textConstantly fluctuating global economic trends are challenging the way cities are growing and creating a new socio-spatial dynamics in India. These changes in the cities are both because; the demands of a growing nation are changing, as it enters a more stable phase of its economic and social growth and also because of India’s constantly progressive position in the global market since the 1990’s. Enforced government plans and policies are further adding different layers of conflicts as they are not able to match with the economic pressures, in addition helping create a much complex and new urban pattern in the fast growing urban peripheries of these cities. With a new set of values, and demands, aspirations where the society is looking at its counter global standards, the government policies are still curbing the growth of these urban areas and further decentralising and privatizing its resources, adding even more conflicting layers. The project tries to highlight different actors and acknowledge there interdependency in shaping these peri-urban spaces.Complex citiesSpatial Planning and designArchitecture and The Built Environmen
ChemInform Abstract: A Novel and Enantioselective Synthesis of D‐(+)‐Biotin via a Sharpless Asymmetric Dihydroxylation Strategy.
No full textAnalysis of a Safe and Fasttrack L Prakash (LPR) Method of Reduction for Anterior Shoulder Dislocation
No full textIntroduction:
Anterior dislocation was the most common type of shoulder dislocation often encountered in emergencies. Many methods were described by authors for reduction, which involves either traction or sedation or some assistance, but they were not without iatrogenic complications. A universally acceptable and ideal method is not yet concluded. Dr L. Praksh (LPR) introduced a new method for reduction which is quick, safe, painless and does not require traction or sedation or assistance and without any complications. This study aims to analyze and safety of the LPR technique.
Materials and Methods:
This was a prospective study conducted in two different institutes by the same author and team. All the cases of acute anterior shoulder dislocation and dislocation with associated greater tuberosity fractures were diagnosed, and necessary details were recorded and reduced by the LPR method. A maximum of two attempts were tried on difficult patients. No traction, no sedation, and no assistance were followed during the maneuver. Time taken for reduction, complications if any were recorded.
Results:
Among 64 patients included in the study, 48 (75%) were male, 16 (25%) were female. The mean age was 37.5 (range 17–65) years. Associated greater tuberosity fractures were seen in 8 (12.5%) patients. LPR method successfully reduced shoulder dislocation in 63 (98.4%) patients, among them 2 (3%) reduced in second attempt. The average time taken for reduction was 3–4 min. No complications were recorded.
Conclusion:
L. Prakash (LPR) method of reduction for anterior dislocation of the shoulder is a FastTrack method which is safe, effective, near ideal and without complications even in associated greater tuberosity fractures
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