Journal of Chemistry, Environmental Sciences and its Applications
Not a member yet
51 research outputs found
Sort by
Green Synthesis of Silver Nanoparticles by Using Pomegranate and Their Antimicrobial Activity-A Revolution
Get PDFThe Pomegranate, punica granatum belongs to the family lythraceae is an ancient fruit. The present study has attempted to analyze the work done by different researchers on green synthesis of silver nanoparticles and their characterization by different techniques like UV-Visible spectroscopy, Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), Tunnling electron microscopy (TEM) and X-ray diffraction method (XRD). The antimicrobial activity were also analyzed in the present paper
Optical and Structural Modifications of γ irradiated Cr-39 Polymers
Get PDFThe UV-Visible absorption spectra of CR-39 polymer, unirradiated and irradiated to gamma radiation up to 500 kGy dose were studied. The development of new peaks, shifting of absorption bands and their broadening as a result of gamma irradiation were observed and analyzed. The values of optical constant like direct and indirect band gaps have been determined. The values of indirect band gap have been found to have lower values then the corresponding values of direct band gap. The increase in carbon conjugation length and size of carbon clusters has also been pointed out from the results of UV-Visible spectroscopy
Challenges and Responsibilities in Successful Management of Municipal Solid Wastes in India
Get PDFManagement of Municipal Solid wastes (MSW) is a genuine problem to all Municipal Corporations irrespective to their size, population or financial condition in India. Scientific technologies are available for pollution free hygienic disposal of all biodegradable solid wastes by converting them to good quality compost and also for systematic recycling of non-biodegradable wastes for their beneficial utilization. Machineries are also available for converting Municipal solid wastes to energy for partial fulfillment of highly demanded electricity. But still all Municipal Corporation in India mainly depend on old open dumping of solid wastes in some low lying dump-yards creating known environmental pollution hazards. The Municipal authority, the district administration and the common citizens have to play a constructive role for overcoming this problem. Important challenges faced by Municipal authorities all over India are non-preparedness to handle huge quantity of MSW generated daily, lacking of awareness by common people on benefits of segregation of MSW at source, non-availability of infrastructure as well as expert / skilled manpower for scientific disposal of MSW, accurate forecasting about city wise MSW generation and proper encouragement to Public – private partnership (PPP) model for efficient management of MSW. Everyone is essential part of this management system. Citizens have to take the responsibility for segregating solid wastes at home before handing over to Municipal workers and for refraining themselves from throwing out any solid wastes. Municipal corporations have to consider MSW as important resource material, use it for beneficial purposes through vermicomposting and recycling, and to stop dumping of MSW at outskirt by unnecessary spending money on its transportation. It is mainly found that installation of costly machinery for mechanical composting and electricity generation have sometimes become not 2 much fruitful to Municipal authorities due to lack of their expertise as well as maintenance and repairing problem of machineries. Scientific disposal with the help of NGOs and Entrepreneurs are found more effective, employment generative and cheaper than adopting costly mechanical system. Paradigm shift in thought process of every citizen can change the situation of management of municipal solid waste successfully
Flavonoids of Calophyllum inophyllum Linnaeus. C. von
Get PDFCalophyllum inophyllum Linnaeus C.von (Syn.) Calophyllum bintagar Roxb of Guttifereae (Clusiaceae) is commonly known as ‘ Indian laurel’ or ‘Alexandhian laurel’ a broad-leaved evergreen tree occurring as a littoral species along the beach crests, sometimes seen inland. It is widely distributed and cultivated throughout tropics from West Africa to Pacific islands (as far) East-as Tahiti. It blossoms during March to October. Fresh flowers of Calophyllum inophyllum have been treated for their flavonoids contents. They are rich flavonol quercetin and flavonol glycosides quercitrin. They have been characterized with the help of modern physical methods like UV, H-1 NMR, C-13 NMR, chemical reactions, chromatographic techniques and hydrolytic studies
Phytoremediation of heavy metals using Brassica juneca-A Review
Get PDFRemediation of contaminated sites with toxic and heavy metals is particularly a challenging task. Therefore pre-treatment is needed before the discharge of these effluents. Among all method investigated presently, Phytoremediation is found to be an emerging and most innovative tool for removal of environmental contaminants such as heavy metals, trace elements, radioactive compounds and organic compounds from soil or water. It has been proposed as a cost-effective and environmental friendly technique. It involves the use of either naturally occurring metal hyper accumulator plants or genetically engineered plants. Indian mustard known as Brassica juncea is well known hyper accumulator. This paper aims to compile some information about sources of heavy metals and their toxicity. It also reviews deeply about phytoremediation technology, including the heavy metal uptake mechanisms and several case studies associated with Brassica juneca
Phytochemical Study of Nothapodytes foetida by LC-ESI-MS
Get PDFIn the present study, hyphenated technique using dyad system of high performance liquid chromatography with diode array detection directly coupled with electrospray ionization mass spectrometry (LC-ESI-MS) has been employed for identification of camptothecines and some minor constituents of methanol extract from different parts of Nothapodytes foetida on the basis of systematic mass spectrum analysis without isolation and purification of these components. Also, a simple, precise, sensitive and reproducible LC-MS method has been developed for quantification of camptothecin (CPT), a potent cytotoxic isoquinoline alkaloid, in methanol extract from these different parts of Nothapodytes foetida using the same technique
Low Voltage Thin Layer Electrophoresis of Anions on Silica Gel-G And Titanium (IV) Tungstate Layers
Get PDFThe low voltage thin layer electrophoresis of anions has been studied on Silica Gel-G and titanium (iv) tungstate layers in in v arious complexing acid media such as Oxalic acid (O.A), Citric acid(C.A), Tartaric acid (T.A) and Succinic acid (S.A).The electrophoretic migration of anions also correlated with lyotropic number, N. The Spots are well defined in electrophoresis
Electrophoretic Study of d-Block Metal Ions on Plain and Tri-n-Butylamine (TBA) Impregnated Titanium (IV) Tungstate Layers
Get PDFRPTLE of ninteen d block metal ion studied on TBA impregnated titanium(IV)tungstate layer in nine solvent system among them three are complex forming acids OA,TA, CA to study the effect of complexation on migration. Electrophoretic migration also correlated with Ionc potential,Kd of metal ions and Ka of acids,pH of electrolytes.The spots are well defined in RPTLE and Mi is positiv
Antimicrobial Efficacy of Green Silver Nanoparticles and Potential Implications for Human Health and the Environment
Get PDFThe beginnings of the applications of nanotechnology in the field of health sciences took place in early 2000s. There is a wide range of application of nanoparticles and its uses are emerging rapidly. Nanoparticle synthesis is usually carried out by various physical and chemical methods using various hazardous and toxic chemicals which may have adverse effect in the medical applications. Nevertheless, green synthesis approaches of producing silver nanoparticles are an alternative source of conventional method and is cost effective, environment friendly, easily scaled up for large scale synthesis and in this method there is no need to exploit high pressure, energy, temperature and toxic chemicals as in case of chemical and physical method. In this review, we report, some of the major applications of green synthesis of silver nanoparticles
CO to CO2 Using Magnesium Based Catalysts: An Overview
Get PDFStringent environmental re gulations have been adopted by the government in order to decrease the emission of vehicular exhaust such as S o x, N o x, C o and unb urned hydrocarbons. t herefore, the de velopment and exploration of catalysts started in the last century for the oxidation of carbon monoxide by different methods have attracted many researchers. t herefore, lar ge number of catalysts have been modified and tested for C o oxidation. t he de veloped catalysts have the ability of 100% conversion. Keeping in view of the literature accumulated in the last few decades for C o oxidation, Magnesium based catalysts ha ve been reported by many scientists for C o oxidation due to its unique characteristics such as high catalytic performance at low temperatures and good durability and stability toward C o oxidation. t his article represents a short re view in tabular form which facilitates a quick view on compounds that have been reported with magnesium previously