ALBERT — All Library Books, journals and Electronic Records Telegrafenberg

11

Digitale Medien

Fourier transform infrared emission spectroscopy and ab initio calculations on RuN (1998)

Ram, R. S.

College Park, Md. : American Institute of Physics (AIP)

The Journal of Chemical Physics 109 (1998), S. 6329-6337

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1089-7690

Quelle: AIP Digital Archive

Thema: Physik , Chemie und Pharmazie

Notizen: The emission spectrum of RuN has been observed in the near infrared using a Fourier transform spectrometer. RuN molecules were excited in a hollow cathode lamp operated with neon gas and a trace of nitrogen. Two bands with 0–0 Q heads near 7354 and 8079 cm−1 and a common lower state have been assigned as 2Π1/2–2Σ+ and 2Π3/2–2Σ+ subbands, respectively, of a C 2Π–X 2Σ+ transition. A rotational analysis of these bands has been performed and molecular constants have been extracted. The principal molecular constants for the ground X 2Σ+ state of the most abundant 102RuN isotopomer are: B0=0.552 782 9(70) cm−1, D0=5.515(13)×10−7 cm−1, γ0 =−0.044 432(22) cm−1 and r0=1.573 869(10) Å. The excited C 2Π state has the following molecular constants: T00=7714.342 60(53) cm−1, A0=725.8064(11) cm−1, B0=0.516 843 4(80) cm−1, D0=5.685(16)×10−7 cm−1, p0=5.467(36)×10−3 cm−1 and r0=1.627 670(13) Å. Ab initio calculations have been carried out on RuN to ascertain the nature of the experimentally observed states and to predict the spectroscopic properties of the low-lying electronic states. Our electronic assignment is supported by these calculations and is also consistent with the observations for the isoelectronic RhC molecule [Kaving and Scullman, J. Mol. Spectrosc. 32, 475–500 (1969)]. The valence electron configuration 1σ22σ21π41δ43σ1 is proposed for the X 2Σ+ ground state of RuN and the configurations for the excited states have been discussed. There is no previous experimental or theoretical work on RuN. © 1998 American Institute of Physics.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.477275

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

12

Digitale Medien

The electronic structure of ZrCl (2001)

Ram, R. S.

College Park, Md. : American Institute of Physics (AIP)

The Journal of Chemical Physics 114 (2001), S. 3977-3987

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1089-7690

Quelle: AIP Digital Archive

Thema: Physik , Chemie und Pharmazie

Notizen: The proposed electronic assignments of our previously reported near infrared transitions of ZrCl [J. Mol. Spectrosc. 186, 335 (1997); 196, 235 (1999)] have been revised following the suggestion of Sakai, Mogi, and Miyoshi [J. Chem. Phys. 111, 3989 (1999)]. The ground state is now assigned as the X 2Δ state followed by the a 4Φ state being the lowest in the quartet manifold. The previously reported transitions [7.3]2Δ–a 2Φ, [9.4]2Φ–a 2Φ, and C 4Δ–X 4Φ are now reassigned to C 2Φ–X 2Δ, E 2Φ–X 2Δ, and d 4Δ–a 4Φ, respectively. The new assignments are supported by our own ab initio calculations. Laser excitation spectra of the 414 nm band system have also been observed at low resolution and are attributed to a 4Γ–a 4Φ transition. © 2001 American Institute of Physics.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.1343904

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

13

Digitale Medien

Infrared emission spectroscopy of the [10.5]5Δ–X5Δ system of VF (2002)

Ram, R. S.

College Park, Md. : American Institute of Physics (AIP)

The Journal of Chemical Physics 116 (2002), S. 7035-7039

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1089-7690

Quelle: AIP Digital Archive

Thema: Physik , Chemie und Pharmazie

Notizen: The emission spectrum of VF has been investigated in the 3400–17 000 cm−1 region using a Fourier transform spectrometer. The bands were excited in a high temperature carbon tube furnace from the reaction of vanadium metal vapor with CF4, as well as in a microwave discharge through a flowing mixture of VF4 vapor and helium. Several bands observed in the 9000–12 000 cm−1 region have been attributed to VF. The bands with high wave number R heads near 9156.8, 9816.4, 10 481.4, 11 035.8, and 11 587.2 cm−1 have been assigned as the 0-2, 0-1, 0-0, 1-0, and 2-0 bands, respectively, of the new [10.5]5Δ–X5Δ system of VF. A rotational analysis of the 5Δ1–5Δ1, 5Δ2–5Δ2, 5Δ3–5Δ3, and 5Δ4–5Δ4 subbands of the 0-1, 0-0, 1-0, and 2-0 bands has been carried out and spectroscopic parameters for VF have been obtained for the first time. The following equilibrium constants have been determined for the ground state of VF by averaging the constants of the different spin components: ΔG(1/2)=665.10 cm−1, Be=0.3863 cm−1, αe=0.0028 cm−1, and re=1.7758 Å. © 2002 American Institute of Physics.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.1464831

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

14

Digitale Medien

Fourier transform infrared emission spectroscopy of VCl (2001)

Ram, R. S.

College Park, Md. : American Institute of Physics (AIP)

The Journal of Chemical Physics 114 (2001), S. 4457-4460

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1089-7690

Quelle: AIP Digital Archive

Thema: Physik , Chemie und Pharmazie

Notizen: The high resolution spectrum of VCl has been observed in emission in the 3000–9400 cm−1 region using a Fourier transform spectrometer. The bands were excited in a high temperature carbon tube furnace from the reaction of vanadium metal vapor and a trace of BCl3 and the spectra were recorded at a resolution of 0.05 cm−1. The new bands observed in the 6000–8000 cm−1 interval have been attributed to VCl. The bands having R heads near 6176, 6589, 7004, 7358, and 7710 cm−1 have been assigned as the 0–2, 0–1, 0–0, 1–0, and 2–0 bands, respectively, of the [7.0]5Δ–X 5Δ electronic transition. A rotational analysis of the 5Δ1–5Δ1, 5Δ2–5Δ2, and 5Δ3–5Δ3 subbands of the 0–1 and 0–0 vibrational bands has been obtained and molecular constants have been extracted. The remaining two of the five subbands could not be analyzed because of severe overlapping from neighboring subbands. The principal molecular constants for the X 5Δ state obtained from the present analysis are: ΔG(1/2)=415.26(113) cm−1, Be=0.165 885(250) cm−1, αe=0.000 586(84) cm−1, and re=2.213 79(170) Å. Our work represents the first observation of this near infrared electronic transition of VCl. © 2001 American Institute of Physics.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.1349426

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

15

Digitale Medien

A quasi-steady state integral model for border irrigation (1986)

Ram, R. S. ; Singh, V. P. ; Prasad, S. N.

Springer

Irrigation science 7 (1986), S. 113-141

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1432-1319

Quelle: Springer Online Journal Archives 1860-2000

Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft

Notizen: Summary A quasi-steady state integral (QSSI) model was developed for irrigation on freely draining borders. A semi-analytical method was used for solving the governing equations. The model results compared favorably with experimental data from 13 experimental borders for advance and from 4 experimental borders for recession. The absolute average percent deviation (APD) between calculated and observed advance times varied between 13.1 and 26.6 for 4 data sets and between 9.2 and 18.8 for 9 data sets. The APD for recession times varied between 1.7 and 5.7 for 4 data sets. The calculated advance times were smaller than observed values for these borders. For constant infiltration parameters, the border bed roughness was found to be the single most important parameter affecting model results.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00259428

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

16

Digitale Medien

Quantitative studies on the mating system of opium poppy (Papaver somniferum L.) (1992)

Patra, N. K. ; Ram, R. S. ; Chauhan, S. P. ; [weitere]

Springer

Theoretical and applied genetics 84 (1992), S. 299-302

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1432-2242

Schlagwort(e): Papaver somniferum ; Outcrossing rate ; Selfing rate ; Mating system

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Summary Nearly 400 individuals at two locations and over a number of years were crossed and subsequently scored for selfing versus outcrossing in eight monohybrid populations of opium poppy (Papaver somniferum). Two different marker loci, petal colour (R/r) and capsule size (B/b) were used to determine the male gametes that had effected fertilizations in F2 recessives (rr and bb). The estimates of the outcrossing parameter α were found to vary with year, location and for the marker locus used (α range: 0.0988–0.3704). Study of two dihybrid crosses involving the two loci simultaneously, further confirmed that outcrossing at the R/r locus was significantly greater than that at the B/b locus. The nature of the outcrossing was, in general, nonrandom. Selfmg predominated in this species; however, there was a high frequency of natural outcrossing for generating variations in P. somniferum.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00229486

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

17

Digitale Medien

Potential of gamma radiation enhancing the biosynthesis of tropane alkaloids in black henbane (Hyoscyamus niger L.) (1989)

Sharma, J. R. ; Lal, R. K. ; Misra, H. O. ; [weitere]

Springer

Euphytica 40 (1989), S. 253-258

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1573-5060

Schlagwort(e): Hyoscyamus niger ; black henbane ; mutation breeding ; genetic improvement ; tropane alkaloids

Quelle: Springer Online Journal Archives 1860-2000

Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft

Notizen: Summary A productive yellow flowered mutant with high tropane alkaloid content was isolated in the M2 generation of gamma irradiated (Co60 at 40 kr) progenies ofHyoscyamus niger. Mutant progenies, on an average, were capable of synthetising more than twice crude alkaloid (0.147% to 0.221%) in M3 through M6 generations compared to the parental control (0.065 to 0.106%). In pilot scale trial (M7), two elite lines, Y-15 and Y-17 were found to contain 0.390% and 0.318% crude drug in contrast to 0.211% in an improved inbred used as control. However, owing to conducive plant morphology, Y-17 registered high yield of dry biomass, hence gave more than double yield of crude drug than the improved control (inbred) (23 kg/ha against 11 kg/ha). Also being superior in hyoscyamine and hyoscine yields, it was redesignated as var.Aela, and released for commercial cultivation in India, thus signifying the efficiency of radiation breeding for crop improvement.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00024520

Permalink