Ultra-dense, single-wavelength DFT-spread OFDM PON with laserless 1 Gb/s ONU at only 300 MBd per spectral group

2014 ◽  
Author(s):  
P. C. Schindler ◽  
A. Agmon ◽  
S. Wolf ◽  
R. Bonk ◽  
L. Meder ◽  
...  
Keyword(s):  
Spectral Group

scholarly journals Spectral Correlations in some Substituted Styryl (E)-4-((2-Oxopropyl)Diazenyl) Benzoic Acids

2014 ◽  
Vol 30 ◽  
pp. 33-43
Author(s):  
V. Sathiyendiran ◽  
K.G. Sekar ◽  
Ganesamoorthy Thirunarayanan ◽  
R. Arulkumaran ◽  
R. Sundararajan ◽  
...  
Keyword(s):  
Regression Analysis ◽  
Statistical Analysis ◽  
Linear Regression ◽  
Linear Regression Analysis ◽  
Benzoic Acids ◽  
Effect Of Substituents ◽  
Substituent Constants ◽  
Multi Linear Regression ◽  
Spectral Group

A series of titled compounds were prepared and analyzed their purities by literature method. The infrared and NMR spectral group frequencies of the compounds were assigned and correlated with Hammett substituent constants, F and R constants using single and multi linear regression analysis. From the results of statistical analysis, the effect of substituents on the above spectral frequencies was discussed.

scholarly journals Solvent-Free Synthesis and Spectral Linearity of Some (E)-2-(substituted benzylideneamino)-N-(3-chloro-4-fluorophenyl)-hexahydro-2H-cyclopenta[b]thiophene-3-carboxamides

2013 ◽  
Vol 13 ◽  
pp. 160-174 ◽  
Author(s):  
Ganesamoorthy Thirunarayanan ◽  
K.G. Sekar
Keyword(s):  
Statistical Analysis ◽  
Microwave Irradiation ◽  
Spectral Data ◽  
Chemical Shifts ◽  
Solvent Free ◽  
Nmr Chemical Shifts ◽  
Substituent Constants ◽  
Substituted Benzaldehydes ◽  
Solvent Free Synthesis ◽  
Spectral Group

Some (E)-2-(substituted benzylideneamino)-N-(3-chloro-4-fluorophenyl)-hexahydro-2H-cyclopenta[b]thiophene-3-carboxamide derivatives have been synthesized by SiO2:H3PO4 catalyzed solvent-free condensation of 2-amino-N-(3-chloro-4-fluorophenyl)-hexahydro-2H-cyclopenta [b]thiophene-3-carboxamide and various substituted benzaldehydes in microwave irradiation. The yield of the imine-carboximido derivatives has been found to be more than 85 %. The purity of all imine-carboximido derivatives has been checked using their physical constants and spectral data. The spectral data of the imine-carboximido derivatives such as infrared ν (cm-1) of CO, NH, C-N, C-Cl, C-F, C=N, and the NMR chemical shifts (δ, ppm) of NH, CH, CO and C=N have been correlated with Hammett substituent constants, F and R parameters. From the results of statistical analysis, the effects of substituent on the above spectral group absorptions have been discussed.

Filters for the Isolation of the 3130 Å. Spectral Group of the Mercury Arc

1947 ◽  
Vol 69 (6) ◽  
pp. 1415-1418 ◽  
Author(s):  
Roy E. Hunt ◽  
Wallace Davis
Keyword(s):  
Spectral Group

scholarly journals Statistical Analysis of the Data Available for Be Stars

1982 ◽  
Vol 98 ◽  
pp. 27-31 ◽  
Author(s):  
Daniel Egret
Keyword(s):  
Statistical Analysis ◽  
Data Center ◽  
Spectroscopic Data ◽  
Statistical Approach ◽  
Be Stars ◽  
Be Star ◽  
General Statistical ◽  
Spectral Group

A comprehensive catalogue of more than 1100 Be stars with known MK classification has been prepared at the Strasbourg Stellar Data Center, and is described in an other session of this Symposium (Jaschek and Egret, 1982). The compilation of photometric and spectroscopic data available for these stars has made possible a general statistical approach of the Be star spectral group.

scholarly journals Solvent-Free Synthesis and Assessment of Substituent Effects from IR & NMR Spectra of some Substituted Benzylidene-5-Ethyl-1,3,4-Thiadiazole-2-Amines

2013 ◽  
Vol 24 ◽  
pp. 89-98
Author(s):  
Ganesamoorthy Thirunarayanan
Keyword(s):  
Spectroscopic Data ◽  
Nmr Spectra ◽  
Chemical Shifts ◽  
Linear Regression Analysis ◽  
Substituent Effects ◽  
Solvent Free ◽  
Substituent Constants ◽  
Multi Linear Regression ◽  
Solvent Free Synthesis ◽  
Spectral Group

A series containing ten titled compounds were synthesized by SiO2:H3PO4 catalyzed solvent-free condensation of substituted benzaldehydes and 2-amino-5-ethyl-1,3,4-thiadiazole under microwave irradiation. The yields of prepared amines are more than 90%. The synthesized amines were characterized by their physical constants and spectroscopic data reported in literature earlier for known compounds. The assigned spectral group frequencies such as infrared νC=N, C-S-C, N-N (cm-1) and NMR chemical shifts (δ, ppm) of CH, C=N have been correlated with Hammett substituent constants, F and R parameters using single and multi-linear regression analysis. From the results of statistical analyses, the effects of substituent on the above spectral data have been discussed.

scholarly journals Assessment of Substituent Effects and Antimicrobial Activities of some 2ʹ,5ʹ-Dimethyl Phenyl Chalcones

2013 ◽  
Vol 24 ◽  
pp. 99-123
Author(s):  
S. John Joseph ◽  
D. Kamalakkannan ◽  
R. Arulkumaran ◽  
S.P. Sakthinathan ◽  
R. Suresh ◽  
...  
Keyword(s):  
Spectral Data ◽  
Aldol Condensation ◽  
Linear Regression Analysis ◽  
Substituent Effects ◽  
Catalytic Amount ◽  
Antimicrobial Activities ◽  
Mass Spectral Data ◽  
Mass Spectral ◽  
Multi Linear Regression ◽  
Spectral Group

Some 2ʹ,5ʹ-dimethyl phenyl chalcones have been synthesized by Crossed-Aldol condensation between 2,5-dimethyl acetophenone and various substituted benzaldehydes using catalytic amount of sodium hydroxide and ethanol. The yields of the chalcones are more than 93%. The purities of these chalcones have been checked by their physical constants, UV, IR, NMR and MASS spectral data. The spectral data of these chalcones have been correlated with Hammett sigma constants, F and R parameters using single and multi-linear regression analysis. From the results of statistical analysis, the effects of substituents on the spectral group frequencies have been discussed. The anti-microbial activities of these chalcones have been evaluated using Bauer-Kirby method

scholarly journals Spectral QSAR and QPR Study of some (E)-4-(((2-Hydroxy-6-(Substituted Phenyl)-1,6 Dihydropyrimidin-4-yl)Methyl)Diazenyl)Benzoic Acid Derivatives

2014 ◽  
Vol 36 ◽  
pp. 10-20
Author(s):  
Ganesamoorthy Thirunarayanan ◽  
K.G. Sekar
Keyword(s):  
Statistical Analysis ◽  
Benzoic Acid ◽  
Nmr Spectra ◽  
Effect Of Substituents ◽  
Benzoic Acid Derivatives ◽  
Substituent Constants ◽  
Spectral Group

A series of titled compounds were synthesized and recorded the infrared and NMR spectra. The assigned spectral group frequencies were correlated with Hammett substituent constants, F and R parameter. From the statistical analysis results, the effect of substituents on the spectral group frequencies has been studied.

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