Journal of Advanced Applied Scientific Research (JOAASR)
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The binding mode of pyrazolone derived copper(II), cobalt(II), nickel(II) and zinc(II) Schiff base coordination compounds with Calf-Thymus DNA
Get PDFTransition metal complexes with Schiff base ligands possess remarkable biomedical activities that could be used to develop new metal-based anticancer agents. Anticancer metal complexes have attracted considerable interest since the successful application of platinum based anti-cancer drugs. Pyrazolone derivatives have been extensively studied and have shown a wide range of pharmacological activities and anticancer activities. A new class of mononuclear copper (II), cobalt(II), nickel(II) and zinc(II) complexes were synthesized using pyrazolone precursor Schiff base, obtained by the condensation of 4–aminoantipyrine with salicylaldehyde and respective metal(II) chloride. They have been characterized by elemental analysis, magnetic susceptibility, molar conductance measurements, UV-Vis., FT-IR, 1H NMR spectra and EPR studies. Their magnetic susceptibility values of the complexes at room temperature are consistent with octahedral geometry around the central metal ions. These complexes show lower conductance values, supporting their non-electrolytic nature. The data show that the complexes have composition of [ML2] type. In vitro DNA binding profiles of all complexes have been explored by absorption titrations, cyclic voltammetry technique and viscosity measurements. The corroborative results of above experiments suggest that these complexes are efficient metallo intercalators and can interact with CT-DNA. The binding constant values (Kb) clearly signify that the complexes bind to DNA through intercalation mode. The binding affinity of these complexes with CT DNA is found to be in the order, Cu(II)>Zn(II)>Co(II)>Ni(II), among them copper complex displaying a higher binding propensity as compared to other complexes
Removal of fluoride ions in drinking water using Fe2O3-zno nanocomposite emedded with grass fibre
Get PDFAbout 80% of the diseases in the world are due to poor quality of drinking water, and the fluoride contamination in drinking water is responsible for 65% of endemic fluorosis in the world. Fluoride deficiency may cause dental caries and excessive use of its standard may cause dental disease, liver and skeletal fluorosis. In this present study, developing a Fe2O3-ZnO embedded AcorusCalamus (Sambu Grass) fibre catalyst to remove excess fluoride from Devipattinam drinking water. Using catalyst such as ZnO and Fe2O3nanopowders which are mixed with pulverized raw grass powder. These carbon nanofibres were characterized by XRD and SEM. The derived nanocomposites were utilized for the removal of fluoride from the drinking water. The water sample was collected from Devipattinam and it was used for further analysis. The solution isotherm and kinetics experiments were performed by batch adsorption experiments and were carried out. The defluoridation studies were conducted for the optimization of various experimental conditions like contact time, initial fluoride concentration, adsorbent dose, and fluoride uptake with fixed dosage by varying pH. The percentage of fluoride ion adsorption increases with increase in adsorbent dose.At a pH of 10 which gives the maximum fluoride adsorbent for metal oxide based fiber
Preliminary phytochemical screenings of marine alga ulva fasciata and its growth performance, biochemical composition on indian major carp cirrhinus mrigala fingerlings
Get PDFTo screening the preliminary phytochemical compounds of Ulva fasciata collected from Mandapam, south east coast, Tamil Nadu, India. U. fasciata, it was subjected to petroleum ether, chloroform, acetone and ethanol extractions. Totally 10 compounds were present in it, such as alkaloids, terpenoids, flavonoids, phenolics, saponins, cardiac glycosides, sterols, quinones and reducing sugar were present in the extract of U. fasciata. Among these, alkaloids, phenolics, quinones, and flavonoids were reducing sugar were luxuriant presence of U. fasciata extract. Basal diet prepared by replacing the fish meal with the U. fasciata at 1, 3 and 5% along with groundnut oilcake and soy bean meal (as protein source), wheat bran and sun flavor oil (as carbohydrate and lipid sources respectively), and tapioca flour and egg albumin as binding agents, and fed to Cirrhinus mrigala fingerlings for 60 days. The artificial feed formulated without incorporation of U. fasciata was served as control. Among the three ratio of U. fasciata incorporated diets, 5% of feed fed C. mrigala fingerlings showed the best (P<0.05) survival and growth performance including weight gain (WG), muscle basic biochemical constituents (total protein, carbohydrate, lipid and ash). Moreover, 5% of U. fasciata incorporated diet can also be considered as a good nutritional supplement. Therefore, the present work recommends incorporation of U. fasciata as feed additive to achieve sustainable production of C. mrigala culture
Fabrication and characterization of form-stable FA ternary eutectic mixture/GO nanocomposite for thermal energy storage
No full textThe thermal conductivity of commonly used phase change materials (PCM) for thermal energy storage (TES), such as, fatty acids, paraffin etc., is relatively poor, which is one of the main drawbacks for limiting their utility. In the recent past, few attempts have been made to enhance the thermal conductivity of PCM by mixing different additives in the appropriate amount. Graphene nanoparticles, having higher thermal conductivity may be a potential candidate for the same, when mixed appropriately with different PCM. In present study, acetic acid , tristearin and stearic acid (CA-PA-SA) ternary eutectic mixture was impregnated into nano-graphene oxide (nano-GO) to prepare a form-stable composite PCM (CAPA-SA/nano-SiO2). The phase change temperature range of the composite PCM is 17.2 ◦C–26 ◦C, which is suitable for indoor thermal environment. The high latent heat value and thermal conductivity of the composite PCM are 169.43 kJ kg-1 and 0.68239 W (m K)-1, which is helpful to stabilize the indoor temperature for a long time and improve human comfort. Furthermore, after 500 heating/cooling cycles, the composite PCM showed good thermal and chemical stability. All the results indicated that the composite PCM is suitable for storing excess solar radiation and reducing the amount and rate of heat loss of buildings in the winter, which will help reduce building energy consumption
Phytochemical Screening and Antimicrobial Activity of Phyllanthus niruri
Get PDFphyllanthus niruri is an Indian herb used for various ailments by traditional healers. In this study carried out phytochemical analysis and antimicrobial investigation of methanolic extract of the leaves phyllanthus niruri against a panel of clinically significant bacterial and fungal strains. Phytochemical studies revealed the presence of Phenolic compounds, Saponins, Flavonoids, Terpenoids, Alkaloids, Tannins, Cardioglycosides, Steroids, Reducing Sugars, Anthraquinones and Resins. Susceptibility testing by disc diffusion assay revealed significant antimicrobial activity of methanol extract of leaves against Coney lunata and Salmonella typhi. The leaf extract exhibited better antimicrobial activity. The study findings provide supportive evidence for the use of phyllanthus niruri in traditional medicines
N-((4-CHLOROPHENYL)(MORPHOLIN-4-YL)METHYL)BENZAMIDE as corrosion inhibitor for mild steel in Sulphuric acid medium
No full textThe inhibiting effect and adsorption behavior of N-[(4-chlorophenyl)(morpholin-4-yl)methyl]benzamide (CPMB) on mild steel in sulphuric acid solution were studied by weight loss measurements, effect of temperature studies, potentiodynamic polarization and scanning electron microscopic techniques. The inhibitor showed greater than 90 % inhibition efficiency at 0.01 M. Potentiodynamic polarization studies showed that the inhibition action is concentration dependent, at low concentration anodic, higher concentration cathodic, inhibition predominant. The adsorption process of CPMB at the mild steel/sulphuric acid solution interface is described by Temkin’s adsorption isotherm model. The negative value of standard free energy of adsorption in the presence of inhibitor suggests spontaneous adsorption of CPMB molecule on the mild steel surface. The protective film formation against the acid attack is confirmed by SEM
Kinetic, thermodynamic and isotherm studies on the removal of rhodamine b dye using acid activated Abutilon Indicum
Get PDFThe research of the present work was to investigate the removal of Rhodamine B dye from aqueous solution using Acid Activated Abutilon Indicum leaves (AAAI). Generally, dyes are organic compounds used as colouring products in chemical, textile, paper, printing, leather, plastics and various food industries. There is a need for the treatment of dye contaminated waste water passed out from the industry due to its harmful effects. In this study, the activated carbon prepared from Abutilon Indicum leaves was studied for its potential use as an adsorbent for the removal of a cationic dye, Rhodamine B. The various factors affecting the adsorption viz., initial dye concentration, contact time, adsorbent dose and temperature were evaluated. The experimental data were fitted into the pseudo-second order kinetic model. The equilibrium of adsorption was modeled using the Langmuir and Freundlich isotherms. The objective of the present work suggests that the AAAI can be utilized as a low cost adsorbent for the removal of Rhodamine B dye from aqueous solution
Removal of Machine industrial from wastewater using cylindrical flow reactor by electrochemical oxidation and optimization of treatment conditions
Get PDFThis work examines the use of electrooxidation for treatment of wash water obtained from industry. Cutting oil was mainly found in the wastewater. The effluent was treated using NaCl as supporting electrolyte using a cylindrical flow reactor in continuous (single pass) mode under various current densities (2-5 A/dm2) and different flow rate (10-40 L/h). By cyclic voltammetric (CV) analysis, the best condition for maximum redox reaction was found. Efficiency of COD reduction and power consumption were studied for each operating conditions. From the results maximum COD reduction of about 93.3 % was obtained at a flow rate of 10 L/h with applied current density of 4 A/dm2. FT-IR spectra studies showed that during electrooxidation, the intensities of characteristic functional groups such as C-H, O-H were reduced and also some new peaks comes to appear. Probable theory, reaction mechanism and modeling were proposed for the oxidation of machine industrial effluent. All the experimental results have indicated that electrooxidation treatment was very effective and was capable of elevating quality of the treated wastewater effluent to the reuse standard of the machine industry
Eco-friendly food preservation: Studies on the synergistic preservative effect of Chitosan and soap nut solution
Get PDFChitosan (CS), the antimicrobial, biopolymer with film forming nature, has been used as a topical preservative for food items like vegetables, fruits, and even for sea food.1In order to have different choices for preservation; we need to search for more materials with such properties. Soap nut (SN), whose botanical name is Sapindus mukorossi, seems to have similar properties. It is saponin, the major component present in soap nut, which is responsible for its antimicrobial and film forming property. There are many reports to support that up to a certain limit saponin can be used for edible purpose.2In this study the synergistic preservative effect of chitosan and soap nut aqueous solutions on fruits and vegetables was evaluated. At first, the antimicrobial effect of CS, SN and [CS+SN] in the film form was studied against Staphylococcus aureus and Escherichia Coli. As expected the film CS+SN exhibited more antimicrobial activity with 25 mm and 23mm zone of inhibition against Staphylococcus aureus and Escherichia Coli respectively. The potential of CS+SN as a preservative was evaluated by spraying a known concentration on different regional fruits like lemon, banana, tomato and orange. Different concentrations of [CS+SN] - 250ppm and 125ppm, along with CS-500ppm, SN-500ppm and water, were compared, where water served as the control. Fruits sprayed with [CS+SN]-250ppm solution, showed significant delay in the change of weight loss, decay percentage, pH, as compared to control fruits. It also maintained better visual quality than CS and SN coated as well as control samples. These findings suggest that [CS+SN], with its synergistic preservative potential will maintain the fruit quality and lead to better acceptance by consumers. Thus Chitosan along with soap nut solution will be a cost effective, eco-friendly and easy to utilize preservative system
Molecular organic framework formed by the ligand of diphenylamine and succinic acid with nickel nitrate
Get PDFThe crystal of Diphenylamine, succinic acid with metal of different concentration can be grown. The crystals of Diphenylamine, succinic acid with Nickel Nitrate of different concentration can be easily prepared and it is done by simple solution technique by adopting hydrothermal method to produce quality crystals. The crystals were subjected to various characterization studies like UV, FTIR and optical Microscopic Analysis