15 resultados para Metastasio, Pietro, 1698-1782.

em Brock University, Canada


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Documents and papers relating to Colonel John Butler and his corps of rangers. Pt.III. 1780-1782.

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A comparative study of in vitro chitin synthase activity in mucoraceous hosts of a mycoparasite: Chitin synthase, the enzyme responsible for the synthesis of chitin in fungal cell wall was extracted from young hyphae of Choanephora cucurbitarum and Phascolomyces articulosus, susceptible and resistant hosts, respectively, to the mycoparasite, Piptocephalis virginiana. Crude enzyme was identified and characterized by measuring the incorporation of the substrate [14C]-UDP-N-acetylglucosamine, into chitin. Most activity occurred in mixed membrane fraction. Inhibition of activity with Polyoxin D and activation with proteases, N-acetyl-glucosamine and magnesium and other ions was observed. Properties of the crude enzyme preparation such as cofactor requirement, Vmax , apparent Km value for UDP-GlcNAc, inhibition by Polyoxin D, response to pH and to temperature, and stability at 4°C were determined. Enzyme activity from both fungi displayed basically the same features as the corresponding enzymes reported from other mucoraceous fungi. However, the two preparations from P. articulosus and C. cucurbitarum differed from each other in their expressed activity (i.e., the preparations from ~ articulosus exhibited higher latency and higher specific chitin synthase activity than the corresponding preparations from ~ cucurbitarum). Trypsin was effective in activation only over a narrow concentration range. Acid protease was the most effec.tive activator. En.dogenous protease estimation indicated higher protease activity in C. cucurbitarum than in P. articulosus. The suggestion is made that regulation of chitin synthase activities may be related to host resistance in the mycoparasitic system.

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In studies of cognitive processing, the allocation of attention has been consistently linked to subtle, phasic adjustments in autonomic control. Both autonomic control of heart rate and control of the allocation of attention are known to decline with age. It is not known, however, whether characteristic individual differences in autonomic control and the ability to control attention are closely linked. To test this, a measure of parasympathetic function, vagal tone (VT) was computed from cardiac recordings from older and younger adults taken before and during performance of two attentiondemanding tasks - the Eriksen visual flanker task and the source memory task. Both tasks elicited event-related potentials (ERPs) that accompany errors, i.e., error-related negativities (ERNs) and error positivities (Pe's). The ERN is a negative deflection in the ERP signal, time-locked to responses made on incorrect trials, likely generated in the anterior cingulate. It is followed immediately by the Pe, a broad, positive deflection which may reflect conscious awareness of having committed an error. Age-attenuation ofERN amplitude has previously been found in paradigms with simple stimulus-response mappings, such as the flanker task, but has rarely been examined in more complex, conceptual tasks. Until now, there have been no reports of its being investigated in a source monitoring task. Age-attenuation of the ERN component was observed in both tasks. Results also indicated that the ERNs generated in these two tasks were generally comparable for young adults. For older adults, however, the ERN from the source monitoring task was not only shallower, but incorporated more frontal processing, apparently reflecting task demands. The error positivities elicited by 3 the two tasks were not comparable, however, and age-attenuation of the Pe was seen only in the more perceptual flanker task. For younger adults, it was Pe scalp topography that seemed to reflect task demands, being maximal over central parietal areas in the flanker task, but over very frontal areas in the source monitoring task. With respect to vagal tone, in the flanker task, neither the number of errors nor ERP amplitudes were predicted by baseline or on-task vagal tone measures. However, in the more difficult source memory task, lower VT was marginally associated with greater numbers of source memory errors in the older group. Thus, for older adults, relatively low levels of parasympathetic control over cardiac response coincided with poorer source memory discrimination. In both groups, lower levels of baseline VT were associated with larger amplitude ERNs, and smaller amplitude Pe's. Thus, low VT was associated in a conceptual task with a greater "emergency response" to errors, and at the same time, reduced awareness of having made them. The efficiency of an individual's complex cognitive processing was therefore associated with the flexibility of parasympathetic control of heart rate, in response to a cognitively challenging task.

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Published by the Committee of Arrangement of Washington County, Maryland.

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Published by the Committee of Arrangement of Washington County, Maryland Printed by G.B. Zeiber and Co.

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Full Title: Speech of the Hon. Daniel Webster, delivered in the House of Representatives of the United States, on the 14th January, 1814, on a bill making further provision for filling the ranks of the regular army, encouraging enlistments, and authorising the enlistments for longer periods of men whose terms of service are about to expire Printed by Snowden and Simms

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Sir John Thomas Duckworth (1747-1817) served as Governor and Commander-in-Chief of Newfoundland when the United States declared war against Great Britain in 1812. He effectively prepared for the war by reviving and expanding the militia forces, establishing a signal station to warn of the approach of enemy ships, and strengthening the seaward forces. He resigned the post in December 1812 in order to take a parliamentary seat for New Romney, on the Kent coast. Sir William Domett (1752-1828) and Sir Joseph Sydney (1768-1831) were both naval officers and members of the Board of Admiralty when the United States declared war on Great Britain in 1812. Sir George Warrender, 4th Baronet (1782-1849), served as Lord of the Admiralty from 1812-1822, and as a Member of Parliament for various constituencies in Great Britain from 1807-1832. Sir John Barrow (1764-1848) was secretary of the Admiralty from 1804-1845, with the exception of the period from Feb. 1806-April 1807. He is best known for his support and encouragement of British exploration, especially in West Africa and the Arctic.

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Sir George Yonge (1732-1812) was a baronet, politician and colonial governor. He was a Member of Parliament for Honiton from 1754-1761 and 1763-1796, British Secretary at War from 1782-1783 and 1783-1794, and Governor of the Cape colony from 1799-1801.

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In the original set, there were 10 medals with inventory numbers 1740-1749. This included Tecumseh, Chief of the Shawnees and construction in 1812 of Fort Prescott in Upper Niagara. These are not included in this collection. The Franklin Mint purchased the Wellings Mint in 1973.

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The origins of the Scottish Rite of Freemasonry can be traced to France around 1754, when a Chapter of Claremont was founded in Paris. Initially this chapter had seven degrees, but by 1758 there were twenty-five degrees, known as the Rite of Perfection. In 1761, Stephen Morin was appointed to introduce the Rite into the New World. He began with Kingston, Jamaica and San Domingo. Further establishments were made in New Orleans, LA(1763); Albany, NY (1767); Philadelphia, PA (1782); and Charleston, SC (1783). In order to improve the disorganized state of the degrees in Europe, “Grand Constitutions” were enacted in 1786. These Constitutions formally brought into existence the “Ancient and Accepted Scottish Rite”. None of the degrees of the Scottish Rite would seem to have origins in Scotland. “Scottish” is translated from the French word “Ecossais”, which is found in some of the French titles of some of the degrees of the Rite of Perfection. It is possible that the Scottish connection is a result of the involvement of a Scotsman, Andrew Michael Ramsey, who may have devised some of the degrees.

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Receipt for list of purchases made by Lieutenant Nelles on behalf of the Indian Department from the firm of Taylor and Forsyth for items such as food, buttons and wine Oswego (2 handwritten pages), New York. Robert Hamilton signed on behalf of Taylor and Forsyth, Aug. 4, 1782.