The significance of volatile antifungal metabolites produced by trichomerma harzianum biotype Th4, in green-mould disease of commercial mushroom crops /

The aggressive mushroom competitor, Trichoderma harzianum biotype Th4, produces volatile antifungal secondary metabolites both in culture and during the disease cycle in compost. Th4 cultures produced one such compound only when cultured in the presence of Agaricus bisporus mycelium or liquid medium made from compost colonised with A. bisporus. This compound has TLC and UVabsorption and characteristics indicating that it belongs to a class of pyrone antibiotics characterised from other T. harzianum biotypes. UV absorption spectra indicated this compound was not 6-pentyl-2H-pyran-one (6PAP), the volatile antifungal metabolite widely described in Th1. Furthermore, this compound was not produced by Th1 under any culture conditions. Mycelial growth of A. bisporus, Botrytis cinerea and Sclerotium cepivorum was inhibited in the presence of this compound through volatility , diffusion and direct application. This indicates that Th4 produces novel, volatile, antifungal metabolites in the presence of A. bisporus that are likely involved in green mould disease of mushroom crops.

Label, "Clarke & Chapman, Packers and Jobbers of Green Apples, Macomb, Illinois

Label on card stock for "Clarke & Chapman, Packers and Jobbers of Green Apples, Macomb, Illinois, 1870-1878"

Captain Lewis Warrington and others : memorial of Lewis Warrington, Captain in the U.S. Navy, (in behalf of himself and the officers and crew of the U.S. sloop-of-war Peacock); praying that the one half of the proceeds of the Epervier and goods which went into the officers and crew of said vessel, it having been decreed to them by the United States court as captors. April 26, 1848.--

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Niagara Falls/Niagara Power, 1792, 1798, 1829, 1832, 1836, 1838, 1848, 1852-1853, 1855, 1859, 1871, 1873, 1875-1876, 1878, 1880-1881, 1883, 1885-1888, 1890-1909, 1916-1917, n.d.

A finding aid for collection RG 86. This archive contains materials relating to Niagara Falls and its development during the late 19th and early 20th century, with particular focus on power operations.

School Board report, Bertie Township, January 13, 1848

Dexter Deverardo settled in the Niagara District around 1834. In 1842, he was elected to the District Council. He served in this position until around 1848, when he became Superintendent of Education for the Niagara District. He subsequently served as county Registrar (appointed in1852), Registrar of the Surrogate Court for Welland (1856), and served as county clerk until 1873.

Letter - Ian Green to Sean O'Sullivan, July 1977

A correspondence between Ian Green and Sean O'Sullivan from July 1977. The first letter is from 4 July 1977 from Sean O'Sullivan, titled "The Nation's Business". He requests a discussion about "Caucus morale". O'Sullivan requests that Joe Clark individually acknowledge members of the party and say "a few words about how proud he is of the men and women who form the P.C. Caucus, and how well they represent the country--moreover, how well they are prepared to help form the next Government." A response from Ian Green (Legislative Assistant) is positive and he forwards the memo to Jodi White, Director of Communications.

Place Card - Girl in Green Dress with Flower

A place card with an illustration of a girl in a green dress and red flowers.

Business Card from Green Acre Kennels

Business card from Green Acre Kennels, Aylmer East, Quebec, n.d.

Vieux souvenirs, 1818-1848

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Memoirs of my Life by John Charles Frémont : Including in the narrative five journeys of western exploration, during the years 1842, 1843-4, 1845-6-7, 1848-9, 1853-4.

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Un recuerdo en memoria de los mexicanos que murierón en la guerra contra los norte-americanos en los años de 1836 a 1848

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Mensage del Exmo. Sr. Presidente provisional de la República, D. Manuel de la Peña y Peña : leído en la apertura de las sesiones del Congreso de 1848.

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Historia de la revolución de 1848

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Histoire de la Revolution de 1848

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