scholarly journals Production of electronically-excited species by photoselection of pathways (POP). [Cross sections summary of research activities at University of Toronto]

1978 ◽  
Author(s):  
none,
Keyword(s):  
Cross Sections ◽  
University Of Toronto ◽  
Research Activities ◽  
Excited Species ◽  
Electronically Excited

Unimolecular decay paths of electronically excited species. VI. The Ã2E state of NH+3

1985 ◽  
Vol 82 (9) ◽  
pp. 4073-4075 ◽  
Author(s):  
C. Krier ◽  
M. Th. Praet ◽  
J. C. Lorquet
Keyword(s):  
Excited Species ◽  
Electronically Excited

Phenotypic plasticity in leaves of four species of arctic Festuca (Poaceae)

1995 ◽  
Vol 73 (11) ◽  
pp. 1810-1823 ◽  
Author(s):  
Nicole S. Ramesar-Fortner ◽  
Nancy G. Dengler ◽  
Susan G. Aiken
Keyword(s):  
Phenotypic Plasticity ◽  
Cross Sections ◽  
Leaf Blade ◽  
Growth Traits ◽  
Continuous Light ◽  
Taxonomic Status ◽  
Trichome Density ◽  
Experimental Conditions ◽  
University Of Toronto ◽  
Species Specific

Leaf phenotypic plasticity of 12 morphological, anatomical, and growth traits was investigated using four species of arctic Festuca (F. baffinensis, F. brachyphylla, F. edlundiae, and F. hyperborea). Plants collected around 78°N in the Canadian Arctic Archipelago were grown for 10 weeks at the University of Toronto in growth chambers in continuous light, under four regimes of temperature and moisture. Significant differences were found between leaves at the time of field collection and leaves of the same plant at the end of the experiment in (i) leaf blade length, (ii) surface vestiture, both in trichome density and angle of the trichomes to the blade surface, and (iii) characters seen in leaf cross sections: blade width, rib thickness, and inter-rib thickness. The four species responded similarly to the experimental conditions, indicating that most of these changes represent part of the developmentally inevitable component of plasticity rather than species-specific adaptations. Trichome density was the only characteristic for which species showed different patterns of response, with a unique pattern of response in F. edlundiae. This and certain growth traits support the taxonomic status of this newly recognized species. The significant effects of temperature and to a lesser degree, water treatments on these leaf anatomical traits indicate that they should be used with caution for the purposes of taxonomy and identification. Key words: Festuca, leaf blade anatomy, phenotypic plasticity.

Experimental Study of Low Energy e-O2 Collision Processes

1971 ◽  
Vol 26 (10) ◽  
pp. 1617-1625 ◽  
Author(s):  
F. Linder ◽  
H. Schmidt
Keyword(s):  
Angular Dependence ◽  
Cross Sections ◽  
Vibrational Excitation ◽  
Resonance Scattering ◽  
Spectroscopic Constants ◽  
Extended Model ◽  
Vibrational Levels ◽  
Electronically Excited ◽  
The Cross ◽  
Electronic Ground

Abstract Elastic scattering, vibrational excitation to v=1, 2, 3, 4 of the electronic ground state, and electronic excitation to the states a1Δ g and b1Σg+ of O2 have been measured in a crossed beam apparatus for collision energies from nearly 0 eV to 4 eV. Differential and integral cross sections have been determined and calibrated on an absolute scale. From 15 vibrational levels of O2-, which could be observed as resonances in the cross sections, the spectroscopic constants for the vibrational structure of O2- have been derived: ωe = 135 meV and ωeχe = 1 meV. The cross sections for vibrational excitation have the order of 10-18 cm2. eV for the larger resonance peaks. Detailed cross sections have been listed in Table 1. The half width of the resonance can be estimated to Γ ≈ 0.5 meV, which corresponds to a lifetime tof 10-12 sec for the O2- states. The angular dependence of pure resonance scattering is rather flat and not in accordance with the simplest theoretical model. An analysis of the angular dependence and of the rotational structure of the resonance in a somewhat extended model have been performed. - No electronically excited O2-states could be detected in the energy range up to 3 eV.

scholarly journals Charles Herbert Best, 27 February 1899 - 31 March 1978

1982 ◽  
Vol 28 ◽  
pp. 1-25 ◽  
Keyword(s):  
Journal Club ◽  
Medical Science ◽  
Early Death ◽  
Good Health ◽  
University Of Toronto ◽  
Research Activities ◽  
The World ◽  
End Products ◽  
Personal Recognition ◽  
The University

In 1921, at a time when Charles Best was only 22 years of age, there appeared in the Medical Building of the University of Toronto a notice which read: ‘University of Toronto Physiological Journal Club Nov. 14th — 4 o’clock — Room 17 Speakers — Dr. Banting Mr. Best Subject — Pancreatic Diabetes’. In this quiet fashion a medical revolution was foreshadowed which ultimately made possible the enjoyment of life, in good health, of millions of diabetic people who otherwise, before 1922, would have faced an early death . In 1972 Dr C. H. Best himself estimated that ‘approximately one hundred and thirty million people have taken insulin since 1922. Some of them have lived 50 years’ (30). To have been the joint discoverer of insulin at the outset of a career in medical science might have been a disability for one w ho aim ed at making subsequent discoveries, but the account that follows later of his research activities shows that this was not so for Charles Best. In a foreword to a Festschrift for Charles Herbert Best which was published in 1968 the Chancellor of the University of Toronto, Dr O. M. Solandt, wrote ‘Most scientists who make discoveries, even ones that lead to important end products, have little contact with those whom they help. Probably all of us have benefited greatly from the work of Einstein, but I doubt if he was stopped on the street by people w ho wanted to thank him personally for the great effect that the theory of general relativity had on their lives. The discovery of insulin was different. Literally millions of diabetics all over the world feel personally indebted to Banting and Best. As with Dr Banting, wherever Dr Best has gone he has been engulfed by an intense personal recognition of himself and his work. He has received quite exceptional public as well as professional acclaim for his achievements.’ But such acclaim did not induce him to rest upon his laurels, as might easily have been true for many others.

scholarly journals Electronically Excited Species

Nature ◽  
1958 ◽  
Vol 181 (4605) ◽  
pp. 320-321
Author(s):  
J. W. LINNETT
Keyword(s):  
Excited Species ◽  
Electronically Excited

Unimolecular decay paths of electronically excited species. II. The C2H+4ion

1981 ◽  
Vol 74 (4) ◽  
pp. 2402-2411 ◽  
Author(s):  
C. Sannen ◽  
G. Raşeev ◽  
C. Galloy ◽  
G. Fauville ◽  
J. C. Lorquet
Keyword(s):  
Excited Species ◽  
Electronically Excited

Generation of electronically excited species during enzymatic oxidation of chlorpromazine and related compound

1985 ◽  
Vol 130 (3) ◽  
pp. 952-956 ◽  
Author(s):  
Minoru Nakano ◽  
Katsuaki Sugioka ◽  
Hiroko Nakano ◽  
Choichi Takyu ◽  
Humio Inaba
Keyword(s):  
Related Compound ◽  
Enzymatic Oxidation ◽  
Excited Species ◽  
Electronically Excited
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