Department of Chemistry university of Allahabad UP India

Email:-neerajktripathi@hotmail.com

Mixed metal-mixed ligand complexes of Ni (II) and Co (II) has been investigated with L-aspartic acid and uracil at silver-silver chloride electrode by the potentiometric technique. The stability constants of Ni (II) – L-aspartic acid –uracil, Co (II)-L-aspartic acid–uracil and Ni (II) – Co (II)–aspartic acid –uracil were determined using SCOGS computer programme and the complex formation were elucidated with the aid of speciation curves. The molar ratio of ternary and quaternary complexes was kept as 1:1:1 and 1: 1: 1: 1: respectively

Department of Chemistrry P.M.B Gujarati Science College Indore MP India

The paper deals with an inhibitory effect against Human Carbonic Anhydrase (hCA) using some topological indices on o-,m- & p-amine benzene sulphonamide. In this paper, we restrict ourselves on connectivity-based indices viz. Balaban Index(J), Balaban related index (F &G), R (cyclomatic number) and 1(Randic-connectivity index).

P.G. Centre of Chemistry (M.U.)  College of Commerce Patna Bihar India 

Email: rameshwarnath.pandey@yahoo.com

Some new hydridophosphine and hydridoarsine complexes of ruthenium (II) and platinum (II) have been prepared using precursor complexes [RuH(CO)(E3)3Cl] and [Pt(E3)4] (E = P/As) without change in oxidation state of ruthenium and with change in oxidation state of platinum. The complexes are characterized using elemental analysis, electrical conductivity, magnetic measurements, IR, UV-Vis, 1H NMR and 31P NMR data. The octahedral structure to ruthenium (II) and square planar geometry to platinum (II) complexes are deduced and tentatively assigned.

Department of Chemistry, Faculty of Science and Arts, Najran University Saudi Arabia

Milk and milk products are very important human nutrient since their consumption has increased in recent years. Good quality measurements are essential to control and maintain milkand its products and processes quality, both in manufacturing trade and in research. The presence of toxic elements in milk and its products may create significant health problems for people. The aim of this paper was to determine the content of toxic and trace elements in different milk and milk products samples, sold in major supermarkets chains in Najran. Inductively coupled plasma atomic emissionspectrometry (ICP-AES) was used for the quantitative determination of elements in this matrix .Analysis were
performed after the chemical mineralization of the samples with nitrogen acid

Department of Cgemistry College of Life sciences CHRI gwalior-MP India

Email:-sunita71bhargava@gmail.com

Chemists have used their knowledge and skill to prepare a large number of new materials which are far better and more useful than the natural products, such as high-tech polymers, liquid crystals, tough ceramics, nonlinear optical substances, novel electronics, designer drugs, genetic materials and new energy sources. The term Green Chemistry was coined in 1991 by Anastas. The purpose is to design chemicals and chemical processes that will be less harmful to human health and environment. Green chemistry protects the environment, not by cleaning up, but by inventing new chemical processes that do not pollute. Green chemistry seeks to reduce pollution at source, whereas environmental chemistry focuses on the study of pollutant chemicals and their effect on nature. Designing Safer Chemicals: Newproducts can be designed that are inherently safer for the target application. Safer Solvents and Auxilliaries: Solvents are extensively used in most of the syntheses. Use of RenewableFeedstocks Chemical transformations should be designed to utilize raw materials and feedstocks that are renewable, but technically and economically practicable. Use of Catalyst: Catalysts are used in small amounts and can carry out a single reaction many times and so are preferable to stoichiometric reagents, which are used in excess and work only once. They can enhance the selectivity of a reaction, reduce the temperature of a transformation, reduce reagentbased waste and potentially avoid unwanted side reactions leading to a clean technology. The values and positive impact of green chemistry to tomorrow’s in different fields

¹Department of Chemical Engineering NIT Jaladhar Punjab India

²Department of Biotechnology, NIT Jalandhar Punjab India

Email:-gargs@nitj.ac.in

In this paper, the starch/PVA blend films were prepared by solution casting method. The blend is further post cross-linked by using sodium hexametaphospahte (SHMP). The extent of crosslinking is measured by swelling degree (SD) and gel mass (GM) analysis. It was seen that concentration of SHMP and sodium carbonate had considerable effect on the crosslinking reaction. With the increase in concentration of SHMP from 2 % to 12 %, GM was increased to 32.8 %. Whereas, with the increase in concentration of sodium carbonate from 0.5 % to 12 %, SD was decreased to 88.4 %. Decrease in swelling degree is favorable for cross-linking reaction.Starch/PVA blend films showed 30% increase in tensile strength after crosslinking with SHMP. Crosslinking with SHMP also improved the moisture resistance of starch/PVAblend films. The cross-linked starch/PVA blend films showed 27 % less water absorption than the non cross-linked starch/PVA blend films.

¹Department of Chemical Engineering NIT Jaladhar Punjab India

²Department of Biotechnology, NIT Jalandhar Punjab India

Email:-gargs@nitj.ac.in

In this paper, the starch/PVA blend films were prepared by solution casting method. The blend is further post cross-linked by using sodium hexametaphospahte (SHMP). The extent of crosslinking is measured by swelling degree (SD) and gel mass (GM) analysis. It was seen that concentration of SHMP and sodium carbonate had considerable effect on the crosslinking reaction. With the increase in concentration of SHMP from 2 % to 12 %, GM was increased to 32.8 %. Whereas, with the increase in concentration of sodium carbonate from 0.5 % to 12 %, SD was decreased to 88.4 %. Decrease in swelling degree is favorable for cross-linking reaction.Starch/PVA blend films showed 30% increase in tensile strength after crosslinking with SHMP. Crosslinking with SHMP also improved the moisture resistance of starch/PVAblend films. The cross-linked starch/PVA blend films showed 27 % less water absorption than the non cross-linked starch/PVA blend films.

¹Department of Chemistry, Dr Ambedkar Institute of Technology, Bangalore India

²Department of Chemistry East West Institute of Technology, Bangalore India

³Department of Science, East West Institute of Technology, BangaloreIndia

⁴Departmentof of Electronics and Communication, Dr Ambedkar Institute of Technology, Bangalore India

Email:-swarup_naga@yahoo.com

Hexavalent chromium compounds are being used in a wide variety of commercial processes and unregulated disposal of the chromium containing effluent has led to the contamination of soil, sediment, surface and ground waters. In order to mitigate the chromium pollution of urban environment due to effluents from various industries particularly from tannery and electroplating industries this study was under taken. An attempt is made to explore the viability of a low cost effluent treatment. Activated carbon obtained from coconut shell is the sorbent material used. Coconut shell carbon adsorption capacity for chromium (VI) is systematically examined. Understanding the uptake of chromium by activated carbon is an important step to optimize parameters for designing effluent treatment procedures for chromium removal. The effect of pH on the adsorption of chromium (VI) by activated carbon was studied at pH values of 1 to7. In this investigation the employability of an abundantly available low cost material namely activated carbon from coconut shell for mitigating chromium (VI) pollution is investigated. Different routes for preparing good porous activated carbon has been identified. The results obtained were analyzed for evaluating the use of carbon from coconut shells for chromium removal from solutions. The chromium removal was effective at a pH of 3 and removal efficiency was more than 95%. Optimum contact time has been found to be 50-60 minutes.

1Project Girls School, laknanour, Madhubani, Bihar India

Professor in Chemistry M.L.S.M College Darbhanga BiharIndia

Email:-mishrapm6@gmail.com

In Continuation of our previous work, stability constants of complexes of Pr(III), Sm(III) and Gd(III) with glutamic acid as lignad have been determined. The stability constant has been determined by the study of proton ligand stability constants.

The stability constant of metal chelates has been determined potentiometrically by Bjerrum method1 involving Irving – Rossotti pH metric titration technique2-5 at constant ionic strength of (0.01M) KNO3 and at constant temperature 20±10 C in water dioxane (60:40) medium.The stability constant of metal complexes with Glutamic acid shows the sequence …… Sm(III) > Gd(III) > Pr(III).

Assistant Prof of Chemistry Govt. P.G. College panna MP India

Prof of Chemistry Govt Girls Degree College, Shahdol Mp India

Email:-modistore@rediffmail.com

Fly ash is the coal combustion residue generated from coal based thermal power plants in all over the world. From some decades the demand of electricity are increasing continually due to increase in population and new industries launched day by day in all over the world, hence the requirement of energy also increased. To fulfill these demands of energy there are a lot of pressure on coal based thermal power stations to produce more and more electricity and hence the amount of this waste by-product (fly ash) is increasing speedily and creates the problem to our environment, because it contains a large number of heavy metals etc. Because of this reason it is necessary to invent some new aspects of utilization of this fly ash in different fields and safe disposal of this waste material also required by human beings. Its disposal is of a serious environmental concern due to its hazardous properties, impact on agriculture and long term risks to ecosystems and human beings both.