International Journal of Advanced Research in

Science and Technology (IJARST)


Volume 7 - Issue 1 | 2018


01. GC- MS analysis of bioactive components of Chloroform and Methanolic leaf extracts of Justicia glauca.

Gayatri Devi B*, Srinivasulu S and Hemalatha K.P.J

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Highlights

The phytochemical constituents of Chloroform and methanol extracts of Justicia glauca leaf were analyzed using gas chromatography-mass spectrometry method. The chloroform and methanol leaf extracts of Justicia glauca were prepared by soxhlet extraction method and concentrated by using rotary evaporator. The concentrated chloroform and methanol extracts were subjected to phytochemical analysis using GC-MS. GC-MS analysis showed the presence of five and six phytocompounds respectively. The phytoconstituents of chloroform extracts are Hexadecanoic acid methyl ester, Nonadecanoic acid 10- methyl, methyl ester, Stearic acid methyl ester, Methyl Oleate, Z-8,10-dodecadienal.

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02. An experimental analysis over partial replacement of coarse aggregate by Ceramic Waste.

Balgopal Guru*, Heena Pratihar, Archana Tripathy and Hashyamayee Behera

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In both developed and undeveloped nations, it has been a specialized test to configuration minimal effort and strong bond concrete. The fundamental focal point of this exploration is to examine the strength of concrete with ceramic waste. The ceramic industry inevitably generates wastes, irrespective of the improvements introduced in manufacturing processes. In the ceramic industry, about 15%-30% creation goes as waste. In this examination contemplate the coarse aggregate has been supplanted by ceramic waste total appropriately in the scope of 0%, 5%,10%,15%, 20% by weight for M-20 review concrete. Compressive Strength test was completed on solidified solid 3D squares after 3rd, 7th, 14th and 28th day of curing in water. In this test the conduct of ceramic mixed in concrete as a coarse aggregate in enhancing its compressive quality has been contemplated. For this examination 3 cubes each for 0%, 5%,10%, 15% and 20% separately is utilized and the compressive quality following 3rd, 7th, 14th and 28th day was dictated by taking 3 blocks of every rate.

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03. Performance Analysis of Static Carry Skip Adder Using 22nm Strained Silicon CMOS Technology.

D. Anisha Esther Annabai*, E. Hemalatha, C . Divya, J. Ajayan, A. MuthuKumar and T.Ravichandran

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A 256-bit adder was designed using 22nm Strained Silicon CMOS technology which is attractive for future VLSI and ULSI application. Carry Skip adders are widely used in cascaded circuit connection and it also improves the delay of the circuit compared to other adders. In this paper, the performance and an analysis on the delay, power, space and speed of strained CMOS technology based static carry skip adder will be presented. The circuits are simulated using 22-nm high performance CMOS with a low supply voltage of 0.8V using HSPICE software tool. The performance of the adder circuit is analyzed by measuring the key parameters of the circuit such as speed, power and also the effect of temperature on circuit performance is also analyzed.

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04. Redox Reactions of Cobalt (III) Complexes of α –Hydroxy Acids by Pyridinium Bromo Chromate in the presence of Surfactants.

M.V. Raghupathi Raju*, K. Anji reddy, N. Vijaya kumar and K.Subramani

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The Kinetics of one electron transfer route seems to be un available for Pyridinium bromo chromate with cobalt (III) bound and unbound complexes of α –hydroxy acids in micellar medium pyridinium bromo chromate oxidises cobalt (III) bound and unbound α –hydroxy acids. It rules out the synchronous C-C bond fission and electron transfer to Cobalt (III) centre. Oxidation of above complexes increases with increase of temperature with increase in micellar concentration. An increase in the rate is observed. The added dimethyl dioctadecyl ammonium chloride (DDAC) increases the rate of oxidation of a reaction much more than Ammonium lauryl sulphate (ALS). Similar trends observed in Lactato and Glycolato Cobalt (III) Complexes.

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05. Studies on optimization of growth parameters for enhanced production of antibiotic activity by isolated Marineactinomycete.

M. V. K. Narsingarao*, T. Samuel David, N. Nagaraju, G. Ravisankar and T. Saroja

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The aim of the present study is to optimize the growth conditions for improved production of antimicrobial activity by promising marine actinomycetes isolated from marine sediments. The indigenous isolate KRBT-401was then investigated for the effect of different nutrients and cultural conditions for antibiotic production. Pridham and Gottlieb's inorganic salts medium was used as the production medium base. The carbon sources employed are arabinose, fructose, galactose, glucose, glycerol, lactose, maltose, mannitol, meso-inositol, starch, sucrose and xylose at 1% (w/v). Among the various carbon sources studied, glucose produced more antibiotic yield followed by starch and glycerol. Similarly the effect of various organic nitrogen sources, inorganic nitrogen sources and aminoacids was studied on the production of antibiotic. Ammonium nitrate at a concent ration of 3.0g/L was found to be the suitable concentration for maximum antibiotic yield.

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06. Stabilization of Soil Subgrade Using Natural Geosynthetics for Flexible Pavements.

Naveen Kumar A. B*

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The quality of a pavement depends on the strength of its sub-grade, improving the quality of natural weak subgrade to enhance its strength and load bearing capacity is essential. If the natural soil is very soft it needs some improvement to act as a sub-grade. It is therefore, needed to replace the natural soil by stabilization with improved strength and compressibility characteristics. The Experimental works have been carried out with natural geosynthetics material like Jute Fiber individually mixed with soil and also in combination with different percentage of Hydrated Lime with several mix proportions to study improvement of weak road subgrade. 1, 2, 3 and 4 percentages of Jute Fiber were mixed with soil and stabilized with 1, 2, 3 and 4 percentage of lime is tested for California Bearing Ratio (CBR).

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07. Isolation and Characterization of Actinomycetes from Visakhapatnam Coast and Screening for Antimicrobial Activities of Actinomycetes against Pathogens.

M. V. K. Narsingarao*, T. Samuel David, N. Nagaraju, G. Ravisankar and T. Saroja

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Highlights

Actinomycetes are one of the most attractive sources of antibiotics. In the present study, 32 isolates were isolated from marine soil sediments from the Bay of Bengal, Visakhapatnam. Isolation of Actinomycetes strain was obtained by serial dilution method and grown on actinomycetes isolation agar. Isolated strains were identified for their antibacterial activity of which only five isolates showed good result. They were evaluated for their inhibitory activity on 10 strains of microorganisms (Staphylococcus aureus (MTCC (Microbial Type Culture Collection) 3160), Bacillus subtilis (MTCC 441), Pseudomonas aeruginosa (MTCC 424), Bacillus cereus (MTCC 430), Proteus vulgaris (MTCC 426), Escherichia coli (MTCC 443), Saccharomyces cerevisiae (MTCC 170), Aspergillus niger (MTCC 961), Aspergillus flavus (MTCC 3396), Candida albicans (MTCC 227)). Antibacterial compounds were produced by submerged fermentation and their activity was checked against bacterial culture by antibiogram analysis where extracellular compounds showed positive result.

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