Toward a climate-dependent paradigm of ammonia emission & deposition.

Existing descriptions of bi-directional ammonia (NH3) land–atmosphere exchange incorporate temperature and moisture controls, and are beginning to be used in regional chemical transport models. However, such models have typically applied simpler emission factors to upscale the main NH3 emission terms. While this approach has successfully simulated the main spatial patterns on local to global scales, it fails to address the environment- and climate-dependence of emissions. To handle these issues, we outline the basis for a new modelling paradigm where both NH3 emissions and deposition are calculated online according to diurnal, seasonal and spatial differences in meteorology. We show how measurements reveal a strong, but complex pattern of climatic dependence, which is increasingly being characterized using ground-based NH3 monitoring and satellite observations, while advances in process-based modelling are illustrated for agricultural and natural sources, including a global application for seabird colonies. A future architecture for NH3 emission–deposition modelling is proposed that integrates the spatio-temporal interactions, and provides the necessary foundation to assess the consequences of climate change. Based on available measurements, a first empirical estimate suggests that 5°C warming would increase emissions by 42 per cent (28–67%). Together with increased anthropogenic activity, global NH3 emissions may increase from 65 (45–85) Tg N in 2008 to reach 132 (89–179) Tg by 2100.

Theses ex logica metaphysica et ethica quas pro baccalaureatus gradu... D. Thoma Aquinate opitulante

El autor aparece en an. ms. después del "defendet"

Con motivo de haver embiado al Señor Abate D. Manuel Lassala, autor de la Ifigenia en Aulide, en idioma italiano, unos exemplares de la traduccion castellana

Contiene: Romance ; A la conquista de Menorca por las Armas Catholicas : Oda ; Al denuedo y constancia con que peleó el Navio Santo Domingo el dia 16 de Enero de 1780 : Oda

Colomb dans les fers, a Ferdinand et Isabelle, après la découvert de l'Amérique ... : [Texto impreso] précédée d'un précis historique sur Colomb

Sign. : []4, A-I8, K4

Nuevo y curioso romance de Don Claudio y Dª. Margarita [Texto impreso]

Hay un ejemplar encuadernado con: Bandos divertidísimos contra los borrachos y borrachas, y gente aficionada al vino (NP849.91/3087).

Effects of mutations involving cell division, recombination, and chromosome dimer resolution on a priA2∷kan mutant

Recombinational repair of replication forks can occur either to a crossover (XO) or noncrossover (non-XO) depending on Holliday junction resolution. Once the fork is repaired by recombination, PriA is important for restarting these forks in Escherichia coli. PriA mutants are Rec− and UV sensitive and have poor viability and 10-fold elevated basal levels of SOS expression. PriA sulB mutant cells and their nucleoids were studied by differential interference contrast and fluorescence microscopy of 4′,6-diamidino-2-phenylindole-stained log phase cells. Two populations of cells were seen. Eighty four percent appeared like wild type, and 16% of the cells were filamented and had poorly partitioned chromosomes (Par−). To probe potential mechanisms leading to the two populations of cells, mutations were added to the priA sulB mutant. Mutating sulA or introducing lexA3 decreased, but did not eliminate filamentation or defects in partitioning. Mutating either recA or recB virtually eliminated the Par− phenotype. Filamentation in the recB mutant decreased to 3%, but increased to 28% in the recA mutant. The ability to resolve and/or branch migrate Holliday junctions also appeared crucial in the priA mutant because removing either recG or ruvC was lethal. Lastly, it was tested whether the ability to resolve chromosome dimers caused by XOs was important in a priA mutant by mutating dif and the C-terminal portion of ftsK. Mutation of dif showed no change in phenotype whereas ftsK1∷cat was lethal with priA2∷kan. A model is proposed where the PriA-independent pathway of replication restart functions at forks that have been repaired to non-XOs.

Letter from E. D. (fragment), undated

Fragment of a personal note signed "E.D."

Character of the Mr. Appleton, 1804 November 12

Small leaf containing a handwritten extract from a November 12, 1804 letter by Rev. Joseph Lathrop to Rev. John Lathrop recommending Rev. Jesse Appleton as the successor to Dr. Tappan.

A Translation of the oration deliver'd at the funeral of Rev'd. President Holyoke, by Mr. Sewall, Professor of ye Languages, at Cambridge, 1769 June 25

This small 11-page pamphlet contains a handwritten English translation of Professor Sewall's funeral oration for President Edward Holyoke on June 25, 1769. The translation begins, "Whereas the Summer advancing when we survey the Earth mantled in green..." The copy includes a small number of edits.