Science Synthesis of 2-(1H-imidazo[4,5-b]pyridin-2-ylimino)-5-arylidenethiazolidin-4-ones,1-(1Himidazo[4,5-b]pyridin-2-yl)-5-methyl-3-aryl-1,3,5-triazinane-2-thiones and 3-(1H-imidazo

1H-imidazo[4,5-b]pyridin-2-amine (1) reacts with ammoniumthiocyanide to form 1-(1H-imidazo[4,5-b]pyridin-2-yl)thiourea (2), which on reaction with chloroacetic acid gives 2-(1H-imidazo[4,5-b]pyridin-2-ylimino)thiazolidin-4-one (3). Compound 3 on condensation gives 2-(1H-imidazo[4,5-b]pyridin-2ylimino)-5-arylidenethiazolidin-4-ones (4a-e). Further 1H-imidazo[4,5-b]pyridin-2-amine (1) reacts with aromatic isothiocyanates to form compound 5 which is cyclized to 1-(1H-imidazo[4,5-b]pyridin-2-yl)-5-methyl-3-aryl-1,3,5-triazinane-2-thiones (6a-e) and 3-(1H-imidazo[4,5-b]pyridin-2-yl)-5-aryl-1,3,5oxadiazinane-4-thiones (7a-e). 1

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Not AvailableThe experiment with 39 sunflower genotypes screened by subjecting them to water stress in the laboratory by treating with PEG (poly ethylene glycol) solution at different concentrations viz., 0.0, -0.2, -0.4, -0.6, -0.8 MPa. root length, shoot length and seedling dry weight decreased with increase in osmotic stress. Increase in root length as a result of stress has also been observedNot Availabl

Non-enzymatic sensing of glucose using screen-printed electrode modified with novel synthesized CeO2@CuO core shell nanostructure

We fabricated a fourth generation glucose biosensor using CeO2@CuO core shell nano structure (CeCCS NSs). A simple leave extract of Ocimum tenuiflorum was used to prepare different wt% of 0.2, 04, 0.6, and 0.8 CuO (shell), above 1 wt% of CeO2 (core). The successful formation was confirmed by various characterization techniques like XRD, Uv–Vis, FTIR, SEM and HR-TEM. In the biosensor, 0.4 wt% of CeCCS NSs has shown efficient properties due to its high surface area. The good conductivity and high catalytic activity towards glucose sensing properties were estimated by screen-printed electrode (SPE). The ampherometric studies of CeCCS/SPE modified electrode have been optimized at potential + 0.4 V, showed a sensitivity of 3319.83 μAm M−1 cm−2 within detection limit of 0.019 μM. More significantly, modified electrodes performed excellently against anti-interference and anti-poisoned activity in glucose sample and exhibited promising results for the sustainable improvement for non-enzymatic sensing applications.One of the authors, Dayakar. T would like to thank their sincere appreciation to the University Grant Commission (UGC), Government of India for financial support through ? Rajiv Gandhi National Fellowship (RGNF)? ( F1- 17.1/2013-14/RGNF-2013-14-SC -AND-41054 ). The author also thanks Centre for Nano Science & Technology (CNST), Institute of Science & Technology (IST), JNTUH, Telangana, India for providing lab and instrumentation facility. Appendix AScopu

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Not AvailableRice (Oryza sativa L.) is a primary source of food for billions of people throughout the world, yet it contains insufficient levels of the key micronutrients iron, zinc and vitamin A to meet the daily dietary requirements. Biofortification of staple food crops has thus been considered a sustainable strategy to overcome the problem of micronutrient deficiencies prevalent in rice. The present investigation was conceptualized with the prime objective of mapping the chromosomal regions associated with high iron and zinc content involving the F2 populations derived from the cross of Swarna with Madhukar for high iron and zinc content using microsatellite markers derived from the genomic regions associated with iron and zinc metabolism. Three polymorphic markers viz., SC 120, SC 128 and SC129 were identified which were unlinked and hence single marker analysis was done to check the association of the marker with the trait. SC129 showed highest significant variation with both iron and zinc at the tune of R2=13.09% and R 2= 19.51%, respectively. The association could be made more stringent by further analysis of more number of lines and using more number of markers.Not Availabl

Evaluation of fly-ash-treated reclaimed asphalt pavement for the design of sustainable pavement bases: An Indian perspective

Reclaimed asphalt pavement (RAP) is a term given to removed and/or milled pavement materials containing asphalt and aggregates. This material is obtained from recycling the existing flexible pavements which have reached the end of their design life or shown excessive cracking. The use of RAP has grown widely reducing the use of virgin material thus helps to conserve the natural resources. It also reduces the amount of construction debris reaching the landfills. RAP can be used in construction of base/subbase of a new pavement which results in huge savings. A 100 % RAP cannot be used directly in base/subbase layers because of its inferior properties such as unconfined compressive strength (UCS), California bearing ratio (CBR) and resilient modulus (Mr). This is because RAP material has a very low or limited bonding as the particles are coated with aged bitumen. These properties can be improved by using RAP in combination with virgin aggregates (VA) and/or calcium based additives such as lime, cement or fly ash. Calcium rich fly ash and a fraction of VA have been used in the present study to evaluate the strength in terms of UCS and stiffness in terms of Mr of RAP to promote as a pavement base/subbase material. The RAP material was collected from an ongoing national highway (NH) expansion project in India. Class “C” fly ash was collected from Neyveli Lignite Corporation (NLC), Tamil Nadu for stabilization studies. Specimens were prepared with 100 % RAP, 80 % RAP + 20 % VA and stabilized with 10, 20, 30 and 40 % dosages of fly ash by weight. In this study, emphasis is given to the mixing methodologies adopted to amend base materials and stabilizer. Traditionally, addition method is preferred for stabilization studies and replacement is preferred for mixture of two materials by weight of the principal material. Two methodologies were compared in terms of results obtained from the Mr and UCS studies and a balanced method was suggested. To know the level of interaction of fly ash with the bitumen coated aged aggregate, X-ray powder diffraction (XRPD) and Scanning Electron Microscope (SEM) studies were also performed. It was observed that the balanced addition method of mixing the stabilizer by weight of principal material would be more beneficial in terms of the strength and stiffness of the mixes. The new design mix consisting of 80:20 proportion of RAP and VA stabilized with 40 % fly ash by weight of the total mix, has met the design specifications laid down by Indian roads congress (IRC) for a base/subbase material of low volume roads

Non-enzymatic biosensing of glucose based on silver nanoparticles synthesized from Ocimum tenuiflorum leaf extract and silver nitrate

An enzyme-free glucose sensor developed based on silver nanoparticles (Ag NPs) via bio-mediated route using Ocimum tenuiflorum leaves extract. The Ag NPs were characterized by X-ray diffraction (XRD), ultraviolet-visible (UV-Vis) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, Particle size analyzer (PSA), Scanning electron microscopy (SEM), Energy-dispersive X-ray (EDAX) spectroscopy, and Transmission electron microscopy (TEM), to study structural, optical and morphological properties. The electrocatalytic activity of Ag NPs towards the oxidation of glucose in the 0.1 M NaOH electrolyte solution was analyzed. The Ag NPs was coated on Glassy carbon electrode (GCE) and reports indicating the outstanding capability such as high sensitivity (895.8 ?AmM?1cm?2), linear range (1?8.9 mM), response time (<4s), low detection limit (0.0048 ?M, S/N = 3), long-term stability, reproducibility, repeatability, and selectivity of the sensor. Therefore, the bio-synthesized Ag NPs can markedly helpful to fabricate non-enzymatic, sustainable, simple, low cost, and eco-friendly glucose monitoring devices.Government of India for financial support through ? Rajiv Gandhi National Fellowship (RGNF) ( F1- 17.1/2013-14/RGNF-2013-14-SC -AND-41054 ). The author also thanks Centre for Nano Science & Technology (CNST), Institute of Science & Technology (IST), JNTUH for providing lab and instrumentation facility