The complete UV spectrum of SO2by electron impact, 2, The middle ultraviolet spectrum

1992 ◽  
Vol 97 (A7) ◽  
pp. 10501 ◽  
Author(s):  
Joseph M. Ajello ◽  
Geoffrey K. James ◽  
Isik Kanik
Keyword(s):  
Electron Impact ◽  
Ultraviolet Spectrum ◽  
Uv Spectrum

The complete UV spectrum of SO2by electron impact, 1, The vacuum ultraviolet Spectrum

1992 ◽  
Vol 97 (A7) ◽  
pp. 10473 ◽  
Author(s):  
Joseph M. Ajello ◽  
Geoffrey K. James ◽  
Isik Kanik ◽  
Brian O. Franklin
Keyword(s):  
Electron Impact ◽  
Vacuum Ultraviolet ◽  
Ultraviolet Spectrum ◽  
Uv Spectrum

Ultraviolet Spectrum Analysis of 1-methyl-3-butyl imidazole Tetrafluoroborate in Ethanol

2013 ◽  
Vol 389 ◽  
pp. 3-6
Author(s):  
Yang Yang Song ◽  
Peng Tian ◽  
Lu Yu
Keyword(s):  
Ionic Liquid ◽  
Linear Regression ◽  
Wavelength Range ◽  
Solution Concentration ◽  
Ultraviolet Spectrum ◽  
Linear Regression Equation ◽  
Uv Spectrum ◽  
Spectrometry Method ◽  
Spectrum Curve ◽  
Maximum Absorption Wavelength

1-methyl-3-butyl Imidazole chloride is prepared by 1methyl imidazole and chlorinated n-butane. BMIBF4 ionic liquid is prepared by BMIC and NaBF4 in the acetone. Scanning ionic liquid in 200~400nm wavelength range, get UV-spectrum curve. The ionic liquid used in the experiment has obvious absorption in 200~400nm wavelength range, and the maximum absorption wavelength determined by ultraviolet spectrometry method is 222nm. Linear regression equation is y =0.02311x+0.02861. Correlation coefficient is 0.99925, indicating there is high related degree between the solution concentration and the absorbance value. The linear range of BMIBF4 ionic liquid in the ethanol is 1-75 mg/L. Take samples randomly and have a repeated determination 5 times, the precision is RSD=0.25%, the recovery rate is between 97.4%~102%.

The UV Spectrum of the Lyman‐Birge‐Hopfield Band System of N 2 Induced by Cascading from Electron Impact

2020 ◽  
Vol 125 (3) ◽  
Author(s):  
Joseph M. Ajello ◽  
J. Scott Evans ◽  
Victoir Veibell ◽  
Charles P. Malone ◽  
Greg M. Holsclaw ◽  
...  
Keyword(s):  
Electron Impact ◽  
Band System ◽  
Uv Spectrum

scholarly journals ULTRAVIOLET SPECTRUM OF EXTRACT OF CENTELLA ASIATICA (VALLARAI) IN EDIBLE OIL AS SUPPLEMENT

2018 ◽  
Vol 11 (4) ◽  
pp. 425 ◽  
Author(s):  
Soundra Pandian G
Keyword(s):  
Coconut Oil ◽  
Centella Asiatica ◽  
Edible Oil ◽  
Ultraviolet Spectrum ◽  
Toxic Chemicals ◽  
Uv Spectrum ◽  
Whole Plant ◽  
Oil Extract ◽  
Whole Plants ◽  
Made In

 Objective: The objective is to create 4 extracts of Centella Asiatica whole plants without using toxic chemicals based on an edible oil and water and to study the UV-vis absorption spectrum of the extracts.Methods: An extract of the whole plant was taken in fresh form with green leaves, made in to a paste by using an electric grinder and the paste mixed with water was heated with coconut oil at temperatures below 100 degree C. The oil part and water part of the extracts were then taken and analysed in an UV-vis spectrometer. The experiment was repeated by using Centella Asiatica whole plants dried in sun for a day.Results: The UV spectrum of the oil extract of undried Centella Asiatica whole plant showed absorption peaks at 413nm, 434 nm, 506nm, 537nm, 564nm, 610nm and 670nm. The oil extract of dried Centella Asiatica whole plant showed peaks at 413nm, and 670nm. The peaks between 434 nm and 670 nm in the oil extract were due to Chlorophyll. The strongest peak at 413 nm is the major signal of the extract and is thought to represent the flavonoid Rutin. The water part of the extract of the dried plants does not show any significant peak at 670nm of the chlorophyll.Conclusion: Four extracts of Centella Asiatica whole plant were studied. The oil part of the extracts showed a strong peak at 413 nm. The medicinal values of the 4 extracts of the plant need to be studied in detail.

scholarly journals Ultraviolet observations of RR Telescopii

1982 ◽  
Vol 70 ◽  
pp. 217-218
Author(s):  
D. Ponz ◽  
A. Cassatella ◽  
R. Viotti
Keyword(s):  
Optical Spectrum ◽  
Ultraviolet Spectrum ◽  
Emission Lines ◽  
Symbiotic Star ◽  
Uv Spectrum ◽  
Physical Conditions ◽  
Wide Range ◽  
Forbidden Transitions ◽  
Ultraviolet Observations ◽  
Comprehensive Study

The ultraviolet spectrum of RR Tel was extensively studied with the IUE satellite since 1978 in both the high and low resolution modes. A comprehensive study of these observations was made by Penston et al.(l98l) who measured more than 400 emission lines. As it is clearly shown in figure 1, the UV spectrum of this symbiotic star is very rich in emission lines. Like in the optical spectrum (Thackeray 1977), the UV spectrum presents emission lines of ions belonging to a wide range of ionization energies, from neutral up to four and five times ionized species (OV, MgV, CaVI, etc.). Permitted, intercombination and forbidden transitions were found which may allow a diagnosis of the physical conditions of the emitting regions. Electron temperatures of 1.2-1.9 104°K and densities of 106-108 cm-3 were derived by Penston et al.

scholarly journals The ultraviolet spectrum of AG Draconis

1982 ◽  
Vol 70 ◽  
pp. 183-184
Author(s):  
A. Altamore ◽  
G.B. Baratta ◽  
A. Cassatella ◽  
A. Giangrande ◽  
D. Ponz ◽  
...  
Keyword(s):  
High Resolution ◽  
Light Curve ◽  
Ultraviolet Spectrum ◽  
The Other ◽  
Emission Lines ◽  
Symbiotic Stars ◽  
Low Resolution ◽  
Uv Spectrum ◽  
O 69 ◽  
The Continuum

The high resolution ultraviolet spectrum of AG Dra was observed with IUE in April and August 1981 at phases 0.50 and O.69 according to the Meinunger (1979, Inf. Bull. Var. Stars No.1611) U-light curve. The UV spectrum of the star appears rather different from that of the other classical symbiotic stars. The low resolution IUE spectrum of AG Dra shown in figure 1. The continuum is rather strong with respect to the emission lines and detectable at high resolution. Many intense interstellar lines are present, in spite of the low reddening of the star (E(B-V)=0.06, according to the depth of the 2200A interstellar band).

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