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Thiruvananthapuram, India

Jisha K.R.,Sn College Kollam | Suma S.,Sn College Kollam | Sudarsanakumar M.R.,Mg College
Polyhedron | Year: 2010

Alkaline earth metal (Mg, Ca, Sr and Ba) complexes of hippuric acid (hipH) have been synthesized and characterized by elemental analyses and IR spectroscopy. One of the complexes, [Ca(hip) 2(H 2O) 2]·H 2O, was characterized by single crystal X-ray diffraction studies. The polymeric structure is based on a dimeric unit and each calcium is coordinated to four hippurate anions and two coordinated water molecules. The hippurate anion functions as a bidentate ligand through the oxygen atoms of the carboxylate groups, one of which is bridging, forming a two dimensional coordination polymer. The water coordination is further confirmed by thermal analysis. The non-linear optical activity of the complexes was also measured. © 2010 Elsevier Ltd. All rights reserved. Source


Khandare H.W.,Mg College
International Journal of ChemTech Research | Year: 2013

Occurrence of fluorine in ground water has drawn worldwide attention due to its considerable impact on human physiology. Presence of low or high concentration of certain ions is a major issue as they make the groundwater unsuitable for various purposes. Fluoride (F-) concentration over and above the permissible limits (1.5 mg/l) in drinking water leads to human health hazards, such as dental and skeletal fluorosis affecting millions of people in many parts of India. Several rocks have fluoride bearing minerals like apatite, fluorite, biotite and hornblende. The weathering of these rocks and infiltration of rainfall through it increases fluoride concentration in groundwater. Fluoride from water or wastewater can be removed by an ion exchange/adsorption process or by a coagulation, precipitation process. The ion exchange/adsorption can be applied to either concentrated or diluted solutions and they are capable of achieving complete removal under proper conditions. The method suitable for a given situation needs to be judiciously selected considering the various aspects. Since ingestion of high fluoride has a long term effect on human health it is essential to monitor its concentration in groundwater used for drinking periodically and take steps to bring them within the permissible range of 0.6 to 1.5 mg/l. There are several methods available for the removal of fluoride from groundwater. The paper presents the current information on fluoride in environment and its effects on human health and available methods of defluoridation in detail. Source


Sankar K.,Mg College | Nazeera Beevi A.,Government College
Oriental Journal of Chemistry | Year: 2011

The Present paper deals with the study of synthesis and characterisation of Cu(II), Co(II), Ni(II) and Mn(III) complexes of polystyrene with 2-aminobenzaldehyde phenyl hydrazone ligand. The study is supported by magnetic susceptibility, infrared and UV-visible spectral study and thermal studies. The ligand and its metal complexes were screened for their antimicrobial activity using S. aureus and E. coli micro organism and found to be moderately active. All the complexes catalyse the decomposition of H2O2, copper(II) complex being the most active. Source


Khandare H.W.,Mg College
International Journal of ChemTech Research | Year: 2013

Groundwater quality is one of the most important aspects in water resource studies 1, 2. The major hydrochemical parameters for ascertaining the quality of water for potable purposes are - Total dissolved solids, Nitrate & Fluoride. Nitrogen is a major constituent of the earth's atmosphere and occurs in many different gaseous forms such as elemental nitrogen, nitrate and ammonia. Natural reactions of atmospheric forms of nitrogen with rainwater result in the formation of nitrate and ammonium ions. Nitrate is one of the most common groundwater contaminants in rural areas and is reported from several areas in Tamil Nadu, Orissa, Karnataka, Maharashtra, Bihar, Gujarat, Madhya Pradesh & Rajasthan. The sources of nitrate in the groundwater were attributed to bedrock dissolution in the course of groundwater migration. Other common sources of nitrate include human sewage and livestock manure. Nitrate is also a common constituent of chemical fertilizers. High nitrate level in drinking water leads to infant methaemoglobinaemia (blue-baby syndrome), gastric cancer goiter, metabolic disorder, birth malformations, hypertension and livestock poisoning. In fact the increased concentration of hydrotoxicants have created socio-economic problem and adversely affected the livelihood of inhabitants. Therefore, for sustainable health and development, immense and immediate efforts are required to combat the problem. In the present communication the extent of problem, distribution of Nitrate in groundwater, their health effects, and remedial measures will be discussed comprehensively. Source


Khandare H.W.,Mg College
International Journal of ChemTech Research | Year: 2012

Abstract: Medical Geology is an emerging scientific discipline that examines the impacts of geologic materials and processes on human health and ecosystem. It is the science dealing with relationship between natural geological factors and health in man and animals and understanding the influence of ordinary environmental factors on the geographical distribution of such health problems. Every day human beings interact directly with nature by way of eating, drinking and breathing, and in the process ingests minerals and trace elements. The material consumed is mostly harmless and even beneficial, supplying essential nutrients to the body. However, the interaction with minerals and trace elements can sometimes have devastating, even fatal effects. All these interactions are covered under the realm of medical geology. It is therefore a fast-growing field that not only involves geoscientists but also medical, public health, veterinary, agricultural, environmental and biological scientists. In the broader perspective, medical geology includes the study of the effects of geologic materials and processes on human, animal and plant health, with both good and bad, even hazardous results. Precisely, medical geology studies exposure to or deficiency of trace elements and minerals; inhalation of ambient and anthropogenic mineral dusts and volcanic emissions; transportation, modification and concentration of organic compounds; and exposure to radio-nuclides, microbes and pathogens. Medical Geology thus relates to the natural sciences such as botany, zoology, ecology, environment and allied sciences. It is therefore high time that the researches in these branches should come forward for the inter-disciplinary research on this subject of prime importance. Source

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