Electron Transfer Involving the Phylloquinone (A1) Cofactor of Photosystem I Examined with Time Resolved Absorbance and Electron Paramagnetic Resonance Spectroscopy

The dependence of the electron transfer (ET) rate on the Photosystem I (PSI) cofactor phylloquinone (A1) is studied by time-resolved absorbance and electron paramagnetic resonance (EPR) spectroscopy. Two active branches (A and B) of electron transfer converge to the FX cofactor from the A1A and A1B quinone. The work described in Chapter 5 investigates the single hydrogen bond from the amino acid residue PsaA-L722 backbone nitrogen to A1A for its effect on the electron transfer rate to FX. Room temperature transient EPR measurements show an increase in the rate for the A1A- to FX for the PsaA-L722T mutant and an increased hyperfine coupling to the 2-methyl group of A1A when compared to wild type. The Arrhenius plot of the A1A- to FX ET in the PsaA-L722T mutant suggests that the increased rate is probably the result of a slight change in the electronic coupling between A1A- and FX. The reasons for the non-Arrhenius behavior are discussed. The work discussed in Chapter 6 investigates the directionality of ET at low temperature by blocking ET to the iron-sulfur clusters FX, FA and FB in the menB deletion mutant strain of Synechocyctis sp. PCC 6803, which is unable to synthesize phylloquinone, by incorporating the high midpoint potential (49 mV vs SHE) 2,3-dichloro-1,4-naphthoquinone (Cl2NQ) into the A1A and A1B binding sites. Various EPR spectroscopic techniques were implemented to differentiate between the spectral features created from A and B- branch electron transfer. The implications of this result for the directionality of electron transfer in PS I are discussed. The work discussed in Chapter 7 was done to study the dependence of the heterogeneous ET at low temperature on A1 midpoint potential. The menB PSI mutant contains plastiquinone-9 in the A1 binding site. The solution midpoint potential of the quinone measures 100 mV more positive then wild-type phylloquinone. The irreversible ET to the terminal acceptors FA and FB at low temperature is not controlled by the forward step from A1 to FX as expected due to the thermodynamic differences of the A1 cofactor in the two active branches A and B. Alternatives for the ET heterogeneity are discussed.

Chapter 10: Antemortem Handling and Welfare

The chapter discusses the following topics: Continuous Measurement and Monitoring, Meat Quality Correlations, How Stressful is Slaughter?, Causes of Poor Welfare Audit Scores, Animal Vision, Hearing and Smell, Basic Handling Principles, Handler Movement Patterns, Design of Handling Facilities, Design and Operation of Restraint Devices, Stunning, Stunning Method and Blood-Splash, Bruising and Meat Quality.

I.O.D.E. Niagara Rangers Chapter Minutes, 1991-1994, n.d.

The Imperial Order Daughters of the Empire was founded by Margaret Polson Murray in 1900 following the outbreak of the second Boer War. The organization gave charitable aid to soldiers and it assisted the dependents of deceased soldiers. The federation of women was formed to promote patriotism, loyalty and service to others. The mayors of Canada’s major cities were urged to call together the prominent women of their communities to join in this endeavor. In 1979, the name I.O.D.E was officially adopted. The organization is federally chartered not-for-profit. The focus is on improving the quality of life for children, youth and the underprivileged through educational, social service and citizenship programs. The membership list for this chapter lists 1917 as the beginning date and 1994 as the end date. The Niagara Rangers Chapter was located in Niagara Falls, Ontario.

I.O.D.E. Stamford Chapter Minutes, 1991-1994, n.d.

The Imperial Order Daughters of the Empire was founded by Margaret Polson Murray in 1900 following the outbreak of the second Boer War. The organization gave charitable aid to soldiers and it assisted the dependents of deceased soldiers. The federation of women was formed to promote patriotism, loyalty and service to others. The mayors of Canada's major cities were urged to call together the prominent women of their communities to join in this endeavour. In 1979, the name I.O.D.E. was officially adopted. The organization is federally chartered not-for-profit. The focus is on improving the quality of life for children, youth and the underprivileged through education, social services and citizenship programs. The membership list for this chapter has 1932 as the beginning date. On September 12, 1994, the group was disbanded. The Stamford Chapter was located in Niagara Falls, Ontario.

I.O.D.E. Col. Kerby Chapter Minutes, 1920-1989, n.d.

The Imperial Order Daughters of the Empire was founded by Margaret Polson Murray in 1900 following the outbreak of the second Boer War. The organization gave charitable aid to soldiers and it assisted the dependents of deceased soldiers. The federation of women was formed to promote patriotism, loyalty and service to others. The mayors of Canada’s major cities were urged to call together the prominent women of their communities to join in this endeavor. In 1979, the name I.O.D.E was officially adopted. The organization is federally chartered not-for-profit. The focus is on improving the quality of life for children, youth and the underprivileged through educational, social service and citizenship programs. The Colonel Kerby Chapter of Fort Erie, Ontario began on August 19, 1914 under the direction of Captain the Reverend A.C. Mackintosh. The chapter was named after Colonel James Kerby who was a legislator and a soldier. This chapter worked during two world wars raising large sums of money for war work, the community, health and education. In 1931, this chapter created the Douglas Memorial I.O.D.E. Hospital Fund to assist needy veterans. Other fundraisers included: their Salvage Shop, card parties and the Margaret Graham Memorial which raised funds for the Canadian Institute for the Blind. In June of 1989 the last meeting of the chapter took place.

Amendment to the Act of Incorporation, chapter 122 of the Long Point Company

Amendment to the Act of Incorporation, chapter 122 of the Long Point Company. This is put out by John I. Mackenzie, secretary, treasurer (2 printed pages), Feb. 18, 1885.