Informatics Publishing Limited

A. K. Nigam , D. K. Tyagi , S. M. Gujar

Abstract

The Great Indian Bustard (Ardeolis nigriceps) (Vigors) is an endemic species to the Indian Sub-continent. In Maharashtra it confines itself mainly to the area of sholapur and Ahmednagar districts. The Sehima-Dichanthium type of grassland of the area requires constant management for ecological reasons and for the conservation of this rare bird along with the conservation of other biodiversity of the area. The management of grassland wi1l reduce the man-wildlife conflict also to certain extent. The grassland of Great Indian Bustard area can be managed for betterment with the right selection of locally acclimatized suitable grass and fodder tree species and with the right selection of management practice inputs.

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Sarita Yadav ¹, D. K. Tyagi ¹, O. P. Yadav ²

Affiliations
1 Department of Chemistry, D.A.V.P.G. College, Dehradun- 248001, Uttrakhand, IN
2 Chemistry Department, CCS Haryana Agricultural University, Hisar-125001, IN

Abstract

Wastewater effluents from textile, paper, tannery and beverage industries are contaminated with variety of pollutants including dyes. Dyes are skin irritant, carcinogenic and can cause allergic dermatitis and mutation. Environmental legislations are now becoming more stringent to control the release of dyes into the environment. Biological treatment of effluent requires a large land area and is constrained by toxicity of some chemicals, and less flexibility in design and operation. Chemical treatments for the removal of dyes from the polluted effluents are not cost effective. Photocatalytic dye degradation techniques suffer from their low efficiency. Adsorption method has been found to be efficient, economical, renewable and eco-friendly solution in treating effluents contaminated with dyes. An overview of the treatments of dye contaminated effluents by biological, chemical and physical methods have been presented.

Keywords

Adsorption, Biological, Chemical, Dyes, Industrial Effluents, Pollutants.

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Ram Partap ¹, Neelam Swaroop ², D. K. Tyagi ³, O. P. Yadav ⁴

Affiliations
1 Department of Chemistry, Government College, Hisar, 125001, IN
2 Jain P.G. College, Mujaffar Nagar (U.P.), 251001, IN
3 Department of Chemistry, D A V College, Dehradun, IN
4 Department of Chemistry, CCS Haryana Agricultural University, Hisar 125 004, IN

Abstract

Critical micelle concentration (CMC), maximum surface excess concentration (Γ_max), minimum area per molecule (A_min) at air-liquid interface of cetyl pyridinium chloride (CPC) in aqueous sodium chloride solutions have been, tensiometrically, determined at 288.15, 293.15 and 298.15 K. Thermodynamic parameters of micellization as well as of adsorption at air-liquid interface have been evaluated. Whereas micellization process is exothermic, adsorption of surfactant at the air-liquid interface is endothermic in nature. The latter process however becomes feasible owing to the predominant entropy gain.

Keywords

Critical Micelle Concentration, Tensiometrically, Micellization, Adsorption, Entropy.

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Sarita Yadav ¹, D. K. Tyagi ¹, O. P. Yadav ²

Affiliations
1 Department of Chemistry, D.A.V.P.G. College, Dehradun- 248001, Uttrakhand, IN
2 Chemistry Department, CCS Haryana Agricultural University, Hisar-125001, IN

Abstract

Kinetic and equilibrium studies for the adsorption of Rhodamine-B dye from aqueous solution onto activated rice husk carbon have been reported. The effect of parameters such as: contact time, dye initial concentration, temperature, adsorbent's amount and particle size on the color removing efficiency of the activated rice husk carbon has been investigated. Kinetics of adsorption of dye at adsorbent in aqueous solution was monitored spectrophotometrically. At the given initial dye concentration, its percent adsorption increases with increase in temperature as well as the adsorbate-adsorbent contact period and the equilibrium was established after 120 minutes. However, at the given temperature, % adsorption of the dye decreases with the increase in its initial concentration. The curves representing adsorption isotherms are single and continuous leading to saturation, suggesting monolayer coverage of the dye on the adsorbent surface. The observed adsorption data was analysed in the light of Langmuir and Freundlich adsorption isotherms. Dye adsorption rate constant (k_ad) follows the first order kinetics. Activation energy (Ea), intra-particle diffusion rate constant and thermodynamic quantities of dye adsorption on the rice-husk carbon have been evaluated and interpreted.

Keywords

Equilibrium, Rhodamine-B, Adsorption, Activation Energy, Thermodynamic.

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Surender Kumar ¹, D. K. Tyagi ¹

Affiliations
1 Department of Chemistry, DAV (P.G.) College, Dehradun-248001, IN

Abstract

Some ester prodrugs of ibuprofen have been synthesized via acid alcohol coupling of Ibuprofen and alcohol derivatives in dichloromethane medium. These newly synthesized prodrugs were analyzed by NMR and IR spectroscopy.

Keywords

Prodrugs and NSAID.

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R. R. Patil ¹, A. B. Waghela ¹, D. K. Tyagi ¹, K. N. Wandile ¹, C. M. Badole ¹

Affiliations
1 MGIMS, Sewagram, Maharashtra, IN

Abstract

Compound injuries with bone loss have a propensity to develop infective non-union. If major bone loss occures then choices of treatment left are vascularized bone grafting, custom mega prosthesis, Ilizarov fixation, and Huntington procedure.

Here we report a case of 3-year-old child who suffered compound grade III injury to lower leg, which developed into infective non-union over a period of 5 years, for which she was treated, and eventually tibialisation of the fibula was performed.

Keywords

Osteomyelitis, Non-Union, Tibialisation

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