Ponkshe C.,Sathaye College
Nature Environment and Pollution Technology | Year: 2012
The 720 km long indented coastline of Maharashtra, that comprises the coastal districts of Thane, Raigad, Greater Bombay, Ratnagiri and Sindhudurg, is marked by the presence of major estuaries and narrow creeks. These coastal waters receive huge volumes of treated and untreated industrial waste, sewage, etc., thus depleting the water quality along the stretches. In the present study carried out at Mumbai, Dharamtar and Guhagar coast, it was observed that the Mumbai coast is highly affected showing low values of dissolved oxygen and high total dissolved content thereby affecting the productivity of the region.
Mohite B.S.,Shivaji University |
Madane N.S.,Sathaye College
Research Journal of Chemistry and Environment | Year: 2015
A simple and selective method for the extraction and separation of thorium (IV) from L-histidine medium using dibenzo-18-crown-6 in xylene has been developed. Thorium (IV) was quantitatively extracted by 5×10-4M dibenzo-18-crown-6 in xylene from 5×10-4M L-histidine medium. The extracted thorium (IV) was stripped out quantitatively from the organic phase with 6 M nitric acid and determined spectrophotometrically with arsenazo (III) at 620 nm. The effect of concentrations of L-histidine, extractant, diluents, metal ion and strippants has been studied. The tolerance limits of various cations and anions were studied. Separation of thorium (IV) from other elements was achieved from binary mixtures. Using this method separation and determination of thorium (IV) in geological and real samples has been carried out. The method is simple, rapid and selective with good reproducibility (approximately ± 2%).
Singare P.U.,Bhavans College andheri |
Lokhande R.S.,University of Mumbai |
Samant N.G.,Sathaye College |
Dhatrak M.R.,Ng Acharya And Dk Marathe College
Colloid Journal | Year: 2010
The thermodynamic measurements was carried out to study the selectivity of cation exchange resin Amberlite IR-120 in protonated form with respect to Mg2+, Ca2+, Sr2+ and Ba2+ ions in solution. The equilibrium constant K was calculated using the activity coefficients of ions in solution as well as in the resin. The K values calculated for the reacting systems increase with temperature that suggests the endothermic exchange reactions with estimated enthalpy values of 38.8, 20.6, 8.45, and 7.24 kJ mol-1, respectively. On the basis of calculated parameters, the selectivity of ion exchange resin with respect to various bivalent ions in the solution was predicted. The method used in our experimental work provides a basis for characterization of ion exchange resins, which can be promising materials for efficient separation of ions from industrial waste effluents. © Pleiades Publishing, Ltd., 2010.
News Article | January 20, 2016
A team of experts discovered ancient Buddhist caves at Mumbai National Park in India. They found a total of seven caves that they assume to be at least 2,000-years old. The caves are possibly dated between the 1st century B.C. and 5t to 6th century A.D. The caves served as shelters for monks, dubbed as Buddhist "viharas", thousands of years ago. One of the caves houses the remains of a "harmika", a stupa's top railing. A team composed of researchers from the Centre of Archeology, Department of Ancient Indian Culture, Sathaye College and Mumbai University, first discovered five of the seven caves in February 2015. "The newly discovered caves may have been older than the Kanheri Caves as they were simpler in form and they lacked water cisterns, which are found in the more evolved architecture of Kanheri," said Suraj Pandit, the one who led the team. "Moreover, we found monolithic tools which were prevalent in the 1st century BC. The absence of water cisterns also indicate that monks lived there in the monsoon," he added. The researchers discovered the seven new caves not by accident, but as a result of a comprehensive survey of the area. To be able to find these ancient caves, the team studied documentary topography and water resources. Ancient people constructed most of viharas near sources of water. Aside from that, they also studied Pali texts, which describe caves in the area of Rajgir, Bihar. The researchers studied areas and texts for three months. They began their exploration as soon as the forest department gave their permission. Two forest guards helped the team in exploring caves. "There were caves on either side of the waterfall - three on one side and two on the other. It was very clear these were excavated from the natural rock," Pandit recalled. "The smooth curve, the plastering, the door beams, the benches to sleep on, were all indications that these were man-made caves," he added. The team found five caves. After a day, another team of a magazine editor and a student of Buddhism at Sathaye College, found two more caves. Mugdha Karnik, head of Mumbai University's Centre for Extra-Mural Studies said that many people do not know the history and culture of the country. He believes that such discoveries will help people learn about their heritage and in turn, protect these structures from destruction posed by industrialization and construction of new buildings.
Lokhande M.V.,Sathaye College |
Tajane S.T.,Sathaye College |
Tajane S.T.,Bhavans College |
George A.K.,Sathaye College |
George A.K.,SIES College
Asian Journal of Chemistry | Year: 2010
Complexes of La 3+, Pr 3+, Nd 3+, Sm 3+, Gd 3+, Tb 3+ and Dy 3+ with pyridine propanamine-γ-(4-chlorophenyl)-N,N-dimethyl-2-maleate have been prepared, structures of the complexes have been established on the basis of elemental analysis, magnetic moment, infrared, thermal analysis, X-ray powder diffraction and electronic spectra. The ligand is bonded through nitrogen of propanamine and nitrogen of pyridine with metal ions. The magnetic moment studies indicate that, it is slightly participation with 4f electrons in bonding. The X-ray powder diffraction studies indicate that, the unit cell is monoclinic and space group of complexes is C 2/m or P c/m. This ligand is anti-histaminic and active towards gram positive and gram negative bacteria.