11 research outputs found
Synthesis and Application of Acid Dyes Based on 3-(4-Aminophenyl)-5-benzylidene-2-substituted phenyl-3, 5-dihydroimidazol-4-one
No full textA series of eight novel heterocyclic based monoazo acid dyes were synthesized using various substituted imidazol-4-one as diazo component and coupled with various amino-napthol sulphonic acids. The resultant dyes were characterized using standard spectroscopic methods and then dyeing performance on wool fabric was assessed. Final results concluded that exhaustion (%E) of the dyes on wool fibers increased with decreasing pH of application and that fixation (%F) of the dyes on wool fibers increased with increasing pH of application and the highest total fixation efficiency was achieved at pH 5. Wash and light fastness properties of prepared dyes showed encouraging results
Dendritic macromolecules as nano-scale drug carriers: Phase solubility, in vitro drug release, hemolysis and cytotoxicity study
No full textPotential of nanoscale triazine based dendritic macromolecules G1, G2 and G3 as solubility enhancers of drug was investigated. Effect of pH, concentration and generation of synthesized dendritic macromolecules on solubility of ketoprofen was studied. G3 dendrimer was further exploited as carrier for sustained release. Ketoprofen was encapsulated by inclusion complex method and also characterized by Flourier Transform Infrared spectroscopy. Sustained release study of ketoprofen from ketoprofen loaded dendrimer was carried out and compared with free ketoprofen. Hemolytic potential and Cytotoxicity assay using A-549 lung cancer cell lines revealed that synthesized triazine based dendritic macromolecules having more potential that commercially available PAMAM dendrimer
Development, Characterization of Hydroxyl Terminated Dendritic Macromolecules as Prospective Drug Carriers
No full textCompeting Interests: The authors have declared that no competing interests exist. Copyright: 2015 Patel PM et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original auth or and source are credited
Structure, I-V characteristics and optical studies of delafossite CuFeO2 and CuFe0.96Ti0.03V0.01O2 prepared under high vacuum
No full textSustainable Agronomic Practices for Soil Conservation and Climate Change Mitigation in India
No full textThis present review paper focuses on the safe and ecological practices that are essential in maintaining the life and mitigate the effects of climate change in Indian agriculture sector. In the paper the author considers specifics of such practices as contour ploughing, terracing, and cover cropping which are vital in preventing the erosion of the soil and improving its structure and fertility. Additionally, it presents the essentiality of conservation tillage, organic farming, and integrated soil fertility management (ISFM) as fundamental process practices for carbon stocks accumulation, greenhouse gases mitigation, and nutrients use efficiency enhancement. The review integrates existing literature to demonstrate that those practices that enhance the various aspects of soil shown above to be beneficial on productivity have beneficial effects on the soil as well: for example, organic carbon content, nutrient replenishment status, and microbial function. But it also comprises the economic, educational, and policy conditions limiting the application of sustainable ideas. In practice, the paper provides examples of the described practices at the regional level and explains the improvements that has been achieved in the context of various Indian states. In the paper’s conclusion, recommendations for future research are provided with a focus on the lasting effects and development of sustainable practices and policy actions to improve the rates of sustainability practice adoption such as grants/credits for financial incentives and educational courses. Thus, in the context of increasing soil degradation and climate change challenges, the review launched a call for the promotion of sustainable agronomic practices in limited access Indian agriculture
An ellipse model for cavity mode behavior of optically injection-locked VCSELs
No full textWe report a new graphical tool to analyze optical injection-locked vertical-cavity surface-emitting lasers (VCSELs). It predicts the resonant frequency enhancement and cavity mode behavior for both single- and multi-mode VCSELs under injection locking. Calculations based on this model show excellent agreement with experimental results. (C) 2012 Optical Society of Americahttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000302138800016&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701OpticsSCI(E)EIPubMed6ARTICLE76980-69882
Experimental and theoretical study of wide hysteresis cycles in 1550 nm VCSELs under optical injection
No full textWe present experimental results of output power bistability in a vertical-cavity surface-emitting laser under optical injection induced by frequency detuning or power variation of the master laser. An ultra-wide hysteresis cycle of 3.7 nm (473.3 GHz) is achieved through frequency detuning, which is more than 11 times wider than that achieved in the state-of-the-art (37 GHz). Furthermore, the width of injection power induced hysteresis cycle we achieved is as large as 7.3 dB. We theoretically analyzed the hysteresis cycles based on standard optical injection locking rate equations including the interference effect of master laser reflection and found excellent agreement with experimental results.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000315991400060&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701OpticsSCI(E)EIPubMed15ARTICLE33125-31322
RF Down-Conversion Based on Optically Injection-locked VCSEL
No full textAll-optical frequency down-conversion of microwave signals is proposed by directly modulated optically injection-locked VeSEL. Two tone 5 GHz RF signals are down-converted to 100 MHz IF signals with 0.0 dB OIL RF down-conversion gain. (C) 2012 Optical Society of Americahttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000322085900187&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701OpticsTelecommunicationsEICPCI-S(ISTP)
Optical phase modulation based on directly modulated reflection-mode OIL-VCSEL
No full textOptical phase modulation based on directly modulated reflection-mode optically injection-locked VCSEL is investigated based on standard OIL rate equations and reflection-mode OIL model. The phase information of both static and dynamic state is simulated. The difference of static state phase information between transmission- and reflection-mode OIL is numerically analyzed. With specific OIL parameters, the output power of directly modulated OIL-VCSEL remains constant and phase deviation of 0.934 pi rad is obtained. Results show that a directly modulated OIL-VCSEL can function as a key component in QPSK or 8PSK transmitters. Preliminary 2.5 Gb/s PSK modulation characteristic is demonstrated experimentally. (c) 2013 Optical Society of Americahttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000325547200038&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701OpticsSCI(E)EI8ARTICLE1922114-221232
30-Gbit/s OFDM Intensity Modulation of 1550-nm VCSEL
No full textWe experimentally demonstrate 30-Gbit/s (24.7-Gbit/s net) OFDM intensity modulation of a low-cost 1550-run VCSEL. The optical OFDM signals transmission over 7-km G.655 SMF is also realized successfully.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000322085900216&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701OpticsTelecommunicationsEICPCI-S(ISTP)
