Mg Science Institute

Ahmadābād, India

Mg Science Institute

Ahmadābād, India
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Varjani S.J.,Mg Science Institute | Upasani V.N.,Mg Science Institute
Bioresource Technology | Year: 2017

Surfactants are one of the most versatile group of chemicals used in various industrial processes. Their market is competitive, and manufacturers will have to expand surfactant production in ecofriendly and cost effective manner. Increasing interest in biosurfactants led to an intense research for environment friendly and cost-efficient production of biosurfactant. Structural diversity and functional properties of biosurfactants make them an attractive group of compounds for potential use in wide variety of industrial, environmental and biotechnological applications. Screening methods make task easier to obtain potential biosurfactant producing microorganisms. Variety of purification and analytical methods are available for biosurfactant structural characterization. This review aims to compile information on types and properties of biosurfactant, microbial screening methods as well as biosynthesis, extraction, purification and structural characterization of biosurfactant using rhamnolipid as a model biosurfactant. It also describes factors affecting rhamnolipid production. It gives an overview of oil recovery using biosurfactant from Pseudomonas aeruginosa. © 2017 Elsevier Ltd.


Zala S.N.,Mg Science Institute
Journal of Pharmaceutical Sciences and Research | Year: 2015

A new, easy and cost-effective synthetic procedure for the preparation of a series of resins was synthesized and analyzed for selective ion-exchange nature for some metals. Urea was reacted with formaldehyde and melamine. These resins were characterized by elemental analysis and studied antimicrobial activities. Synthesized Resin shows ion exchange capability and moderate activity against microbial. Ion exchange resin also showed reusability and stability at an elevated temperature. © 2015, Pharmainfo Publications. All Rights Reserved.


Shah R.D.,Mg Science Institute | Jasinski J.P.,Keene State College
Acta Crystallographica Section E: Structure Reports Online | Year: 2010

In the title compound, C18H11ClN6, the pyrrole, pyrimidine and tetra-zole rings form a nearly planar fused trihetrocyclic system with an r.m.s. deviation of 0.0387 (13) Å, to which the 4-chloro-phenyl group and the phenyl group are substituted at the 7 and 9 positions, respectively. The dihedral angles between the pyrrole ring and the 4-chloro-phenyl and phenyl rings are 32.1 (4) and 7.87 (7)°, respectively. In the crystal, weak inter-molecular C - H⋯N and C - H⋯Cl hydrogen bonds link the mol-ecules into a layer parallel to the (001) plane. The layers are further connected by π-π stacking inter-actions [centroid-centroid distances: 3.8413 (8) and 3.5352 (8) Å]. Intra-molecular C - H⋯N hydrogen bonds are also present.


Baldaniya B.B.,Mg Science Institute | Jasinski J.P.,Keene State College
Acta Crystallographica Section E: Structure Reports Online | Year: 2010

In the title compound, C24H22N2O 4S, the central pyrimidine ring is significantly puckered, assuming a conformation inter-mediate between a boat and a screw boat. The nearly planar thia-zole ring (r.m.s. deviation = 0.0258 Å) is fused with the pyriamidine ring, making a dihedral angle of 9.83 (7)°. The carboxyl group is in an extended conformation with an anti-periplanar orientation with respect to the dihydropyrimidine ring. The benzene ring linked at the chiral C atom is perpendicular to the pyrimidine ring [dihedral angle = 85.21 (8)°] whereas the phenyl ring is nearly coplanar, making a dihedral angle of 13.20 (8)°. An intra-molecular C - H⋯S hydrogen bond is observed. The crystal packing is influenced by weak inter-molecular C - H⋯π inter-actions and π-π stacking between the thia-zole and phenyl rings [centroid-centroid distance = 3.9656 (10) Å], which stack the mol-ecules along the c axis.


Pandya C.V.,Mg Science Institute | Patel P.M.,P.A. College | Baluja K.L.,University of Delhi
Chinese Journal of Physics | Year: 2010

Theoretical studies of elastic electron scattering by a calcium atom have been made by employing a model complex optical potential (composed of static, exchange, polarization and absorption terms). The complex optical potential, free from any adjustable parameter, is treated exactly in a variable phase approach to yield scattering complex phase shifts and the differential scattering cross section in the intermediate energy region. The calculations were performed at electron impact energies 10, 60, and 100 eV. We report on the elastic, inelastic, and momentum transfer cross sections up to 500 eV and compare them with other results. The present method is quite simple in nature and is able to reproduce fairly well the experimental differential cross sections (DCS) and other cross sections in the present energy regions. © 2010 The Physical Society of the Republic of China.


Joseph J.K.,M. S. University of Baroda | Patel S.J.,M. S. University of Baroda | Bhatt N.Y.,Mg Science Institute
Journal of the Geological Society of India | Year: 2012

The Middle Jurassic rocks of the Kaladongar Formation well exposed in the Kaladongar Hill range of the Patcham Island and Kuar Bet of the Northern Kachchh comprises of ~450 m thick sequence of mixed siliciclasticcarbonate sediments intercalated with shales. These Mixed siliciclastic-carbonate sediments show wide variation in textural and mineralogical composition and represent genetically related six rock types: micritic sandstone, allochemic sandstone, sandy allochemic limestone, micrtic mudrock, sandy micrite and muddy micrite; which are highly bioturbated and show behaviourally diverse groups of trace fossils. Total 34 ichnogenera are identified, which includes, Arenicolites, Asterosoma, Beaconites, Bergaueria, Chondrites, Cochlichnus, Dactylophycus, Daedalus, Didymaulichnus, Diplocraterion, Gordia, Gyrochorte, Gyrolithes, Ichnocumulus, Laevicyclus, Lockeia, Margaritichnus, Monocraterion, Nereites, Ophiomorpha, Palaeophycus, Phoebichnus, Phycodes, Pilichnus, Planolites, Plug Shaped Form, Protovirgularia, Rhizocorallium, Scolicia, Skolithos, Taenidium, Teichichnus, Thalassinoides and Walcottia. These trace fossils are classified into six morphological groups namely, circular and elliptical structures; simple structures; branched structures; rosette structures; spreiten structures; and winding and meandering structures. These trace fossils are further group into eight assemblages which occurred together into mixed siliciclastic-carbonate sediments, include, Asterosoma assemblage, Gyrochorte assemblage, Rhizocorallium assemblage, Thalassinoides assemblage, Planolites-Palaeophycus assemblage, Phycodes assemblage, Ophiomorpha assemblage and Skolithos assemblage. The recurring pattern of these assemblages through the sequence displays the development of Skolithos and Cruziana ichnofacies and at places the mixed Skolithos-Cruziana ichnofacies which suggest a low wave and current energy conditions with intervening period of high wave and current energy conditions and an intermediate period of stressful environments, respectively. Sedimentological and ichnological data suggest that the deposition of the mixed siliciclastic-carbonate sediments of the Kaladongar Formation took place in the foreshore to offshore environment under fluctuating wave and current energy condition. © Geol. Soc. India.


Patel S.J.,M. S. University of Baroda | Joseph J.K.,M. S. University of Baroda | Bhatt N.Y.,Mg Science Institute
Journal of the Geological Society of India | Year: 2014

The middle Jurassic Goradongar Formation exposed in Goradongar hill represents a mixed siliciclasticcarbonate succession with shales and limestones. They contain a large number of well preserved trace fossils. Total 44 ichnospecies of 31 ichnogenera; representing diverse ethology, were grouped in five ichnoassemblages (Planolites, Palaeophycus, Gyrochorte, Rhizocorallium and Arenicolites assemblage). These recurring ichnoassemblages represent the Cruziana ichnofacies and occasionally a mixed Skolithos-Cruziana ichnofacies. Patterns of diversity and density of the trace fossils reveal changes in bathymetry, oxygen level, trophic level and the sub-strate conditions at the time of deposition. These paleoenvironment and palaeo-oceanography changes are co-relatable to world-wide Bathonian-Callovian (middle Jurassic) deposits. © 2014 Geological Society of India.


Varjani S.J.,Indian Institute of Science | Varjani S.J.,Kadi Sarva Vishwavidyalaya University | Upasani V.N.,Mg Science Institute
Bioresource Technology | Year: 2016

The aim of this work was to study the potential of an indigenous strain of Pseudomonas aeruginosa NCIM 5514, isolated from petroleum-polluted soil, for the biodegradation of crude petroleum oil. The isolate completely decolorized 2,6-dichlorophenol indophenol in 120 h when grown at (37 ± 1 °C), indicating its hydrocarbon utilizing nature. Ex situ biodegradation study was performed to find out quantitative utilization and biodegradation of paraffin(s) present in crude oil. When the culture was grown in Bushnell-Hass medium containing crude oil (3%, v/v) at 37 °C, 180 rpm for 60 days, the viscosity of the oil was reduced from 1883 cp to 1002 cp. Gravimetric and gas chromatographic analysis showed 61.03% and 60.63% of biodegradation of C8–C36+ hydrocarbons, respectively. These results indicated that the isolate has potential to be used for ex-situ and in-situ bioremediation of hydrocarbon pollutants and could have promising applications in petrochemical industry. © 2016 Elsevier Ltd


The crystal structure of N-[2,4,5-Trichlorophenyl] acetamide is optimized through semiempirical method to describe the influence of interactions on crystal packing using MOPAC2009 program. The electric dipole moment (μ) and molecular hyperpolarizabilities (β and γ) are computed by time dependent Hartree Fock (TDHF) method to inspect the non-linear optical behaviour of the material. The UV-VIS spectral study of material in 300-1100 nm wavelength range shows a wide transparency window which is the key requirement for the non-linear optical (NLO) property of the material. The experimentally measured value of second harmonic generation efficiency is 0.8 times to that of reference material potassium dihydrogen phosphate (KDP). The intramolecular charge transfer interaction results during the HOMO-LUMO transition observed from molecular orbital calculations. © (2014) Trans Tech Publications, Switzerland.


PubMed | Mg Science Institute and Kadi Sarva Vishwavidyalaya University
Type: | Journal: Bioresource technology | Year: 2016

The aim of this work was to study the potential of an indigenous strain of Pseudomonas aeruginosa NCIM 5514, isolated from petroleum-polluted soil, for the biodegradation of crude petroleum oil. The isolate completely decolorized 2,6-dichlorophenol indophenol in 120h when grown at (371C), indicating its hydrocarbon utilizing nature. Ex situ biodegradation study was performed to find out quantitative utilization and biodegradation of paraffin(s) present in crude oil. When the culture was grown in Bushnell-Hass medium containing crude oil (3%,v/v) at 37C, 180rpm for 60days, the viscosity of the oil was reduced from 1883cp to 1002cp. Gravimetric and gas chromatographic analysis showed 61.03% and 60.63% of biodegradation of C8-C36+ hydrocarbons, respectively. These results indicated that the isolate has potential to be used for ex-situ and in-situ bioremediation of hydrocarbon pollutants and could have promising applications in petrochemical industry.

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