Air Ducts

Air duct running along the utilities tunnel.

An investigation into differences between indoleacetic acid and fusicoccin in their influence on RNA synthesis, protein synthesis and growth in Avena coleoptile tissue

Growth stimulation of Avena coleoptile tissue by indoleacetic acid (IAA) and fusicoccin (FC) was compared by measuring both their influence on RNA and protein synthesis during IAA or FC stimulated growth. FC stimulated growth more than IAA during the initial four hour exposure, after which the growth rate gradually declined to the control rate. FC, but not IAA, increased the uptake of 3H-Ieucine into tissue and the specific radioactivity of extracted protein. Cycloheximide inhibited the incorporation of 3H-Ieucine into protein by approximately 60% to 70% in all cases. In the presence of cycloheximide 3H-radioactivity accumulated in FC-treated tissue, whereas IAA did not seem to influence 3H-accumulation. These results suggest that FC stimulated leucine uptake into the tissue and that increased specific activity of coleoptile protein is due to increased leucine uptake, not an increased rate of protein synthesis. There was no measurable influence of IAA and/or FC on RNA and protein synthesis during the initial hours of a growth stimulation. Inhibitors of RNA and protein synthesis, actinomycin D and cycloheximide, respectively, severely inhibited IAA enhanced growth but only partially inhibited FC stimulated growth. The data are consistent with suggestions that a rapidly turning over protein participates in IAA stimulated growth, and that a continual synthesis of RNA and proteins is an absolute requirement for a long term growth response to IAA. On the contrary, FC-stimulated growth exhibited less dependency on the transcription and translation processes. The data are consistent with proposals suggesting different sites of action for FC and IAA stimulated growth. l?hen compared to CO2-free air, CO2 at 300 ppm had no significant influence on coleoptile growth and protein synthesis in the presence or absence of lAA or FC. Also, I mM malate, pH 6.0 did not influence growth of coleoptiles in the presence or absence of lAA. This result was obtained despite reports indicating that 300 ppm CO2 or I mM malate stimulates growth and protein synthesis. This lack of difference between CO2-treated and untreated tissue could indicate either that the interstitial space CO2 concentration is not actually different in the two treatments due to significant endogenous respiratory CO2 or else the data would suggest a very loose coupling between dark CO2 fixation and growth. IAA stimulated the in vivo fixation of 14c-bicarbonate (NaHI4c03) by about 25% and the addition of cycloheximide caused an inhibition of bicarbonate fixation within 30 min. Cycloheximide has also been reported to inhibit IAA-stimulated H+ excretion. These data are consistent with the acid growth theory and suggest that lAA stimulated growth involves dark CO2 fixation. The roles of dark CO2 fixation in lAA-stimulated growth are discussed.

The use of lichens as indicators of ambient air quality in Southern Ontario

The inverse relationship between arboreal lichen species richness and sulphur dioxide in ambient air has been thoroughly documented in the literature. Previous work in southern Ontario has shown that lichen bioindication can identify areas of potential concern regarding air quality. The EMAN suite of l i chens was applied in the City of Samia by surveying 458 Sugar Maple trees, in order to test the applicability of lichen bioindication under conditions of high mean S02 levels and high species richness values. The results of the survey were explored using Geographic Information Systems. A spatial relationship between lichen community variables, the Bluewater Bridge and the highway was identified. Lichen species richness, lichen percent cover and Index of Atmospheric Purity values were higher along the bridge and highway. No strong gradients were found between other known pollution sources and no lichen deserts were identified. The most common community grouping consisted of Physcia millegrana Degel, Candelaria concolor (Dicks) B. Stein, Physcia aipolia (Ehrh ex Humb.) Furnrohr; all of which are known nitrophytes. The relationship between substrate pH and lichen species richness was examined. Sites with a known source of anthropogenic chemical contamination were found to have a correlation of l=0.8 between lichen species richness and pH. The inverse was found for sites with no known source of contamination with a correlation of r 2 =-0.72. The findings suggest that species richness may be influenced by altering substrate pH which promotes the growth of nitrophytic species capable of tolerating high S02 levels.

Acts of incorporation and amendments of the Niagara Falls Suspension Bridge Co'y and the Niagara Falls International Bridge Co'y, also articles of association, leases, agreements, etc. (1900)

Contains "Acts of Parliament of Province of Canada and Acts of Parliament of Dominion of Canada."

SYNTHESIS OF CYCLIC AZOBENZENE ANALOGUES FOR INCORPORATION INTO OLIGONUCLEOTIDES, PEPTIDES AND POLYMERS

(A) In recent years, considerable amount of effort has contributed towards enhancing our understanding of the new photoswitch, cyclic azobenzene, particularly from the theoretical point of view. However, the challenging part with this system was poor efficiency of its synthesis from 2,2’- dinitrodibenzyl and lack of effective methods for further modification which would be useful to incorporate this system into biomolecules as a photoswitch. We report the synthesis of cyclic azobenzene and analogues from 2,2’-dinitrodibenzyl, which would allow for further incorporation of this cyclic azobenzene into biomolecules. Reaction of 2,2’-dinitrodibenzyl with zinc metal powder in the presence of triethylammonium formate buffer (pH-9.5) gave a cyclic azoxybenzene, 11,12-dihydrodibenzo[c,g][1,2]diazocine-5-oxide. The latter compound was converted into cyclic azobenzene analogues (bromo-, chloro-, cyano-, and carboxyl) through subsequent transformations. The carboxylic acid analogue was reacted with D-threoninol to give the corresponding amide, which readily undergoes photo-isomerization upon illumination with light. Upon illumination with light at 400 nm, approximately 70% of cis- isomer of amide was isomerized to trans- isomer. It was observed that cis- to trans- isomerization reached the maximum steady state of light transmission after approximately 40 min, whereas the trans- to cis- isomerization approximately acquired in 2 h to regain full recovery of light transmission. Cyclic azobenzene phosphoramidite was synthesized from DMT-protected D-threoninol linked cyclic azobenzene. (B) In recent years, there has been considerable interest invested towards the synthesis of azobenzene analogues for incorporation into proteins. Among the many azobenzene analogues, the synthesis of bi-functional cyclic azobenzene analogues for the incorporation into proteins is relatively new. In this thesis, we report the synthesis of a cyclic azobenzene biscarboxylic acid from 4-(bromomethyl)benzonitrile. (C) Azobenzene has been widely used in the field of polymer science to study the surface morphology and surface properties of polymers. In this thesis, we report the incorporation of cyclic azobenzene into a commercial polymer 2- (hydroxyethyl)methacrylate. Samples collected after 24 h from the reaction solution showed approximately 9% of incorporation of cyclic azobenzene into polymer compared to samples collected after 10 h, which showed approximately 6% incorporation.

"Flying High" - Air Canada and Inniskillin

A media release announcing Air Canada's use of "Inniskillin's 1978 Chardonnay on all first class domestic flights". The announcement describes the process of making the wine and the flavour. Also included is a 1978 Chardonnay label.

Cuban Tourist Commission Air Certificate, 1955

A certificate from the Cuban Tourist Commission "in recognition of his success in crossing the Channel to Cuba from the United States in the Sixth Annual All Women International Air Race". The certificate was awarded to Dorothy Rungeling on July 11, 1955.

9th Annual All Woman Transcontinental Air Race Program, 1955

An official program from the 9th Annual All Woman Transcontinental Air Race, July 2-6 1955, Long Beach, California - Springfield, Massachusetts. Mrs. Dorothy Rungeling is number 36 in the program. Many of the female pilots have signed their profiles in the program for Mrs. Rungeling.

Article - "Dorothy Rungeling Enters "Powder Puff" Air Derby, 1958

An article about Dorothy Rungeling in her third Derby competition in 1958. She will be co-piloted by Miss Susan Koch and the route will take them from San Diego, California to Charleston, South Carolina.

The Confederate Air Corps Certificate, 1958

A certificate from The Confederate Air Corps that reads, "To all who shall see these presents, greeting: Know yes, that in recognition of his having manifested an unusually high regard for black-eyed peas, turnip greens, hog jowl, sow belly, pot likkers, grits, chittlins, and good old corn squeezins, Dorothy Rungeling is, as of this date, hereby appointed to the rank of Colonel in the Confederate Air Corps. This officer will, by virtue of this appointment, therefore, be obliged to carefully and diligently discharge the duties of the office to which appointed by doing and performing all manner of things thereunto belonging. As evidence of his good faith in accepting this commission, the officer named herein will continue to praise the glories of the Deep South, consume a true gentleman's share of the fares mentioned above, pay respectful homage to our lovely Southern Belles, save his Confederate money, harass the carpetbaggers, and always remember that damnyankee is one word. As Secretary of this Corps, I strictly charge and require all officers of the air militia of the South to render such obedience and courtesies as are due an Officer of this distinguished rank and honored position. Done at the City of Montgomery, Alabama, the Cradle of the Confederacy, this Seventh day of July in the year One Thousand Nine Hundred and Fifty Eight." It is stamped with the name Thadeus P. Throckmorton - Secretary, Confederate Air Corps.

1963 Annual All Women's International Air Race Program

A program for the 1963 Annual All Women's International Air Race from Welland, Ontario, Canada to Hollywood-by-the-Sea, Florida. The race took place May 28-29-30 and was sponsored by the Hollywood-By-The-Sea, Florida, Chamber of Commerce and the Florida Women Pilots Association, Inc.

Article - "Canadians in Air Race", 1951

An article clipping discussing the four Canadian women entered in the third annual All Women's International Air Race in 1951.

Third Annual All-Women's International Air Race Flight Log, 1951

A chart of Dorothy Rungeling's flight landings and departures during the Third Annual All-Women's International Air Race in 1951.