Massachusetts Mercury, 10 June 1800 (vol. 15, no. 46) - Newspaper

Volume 15 no. 46 of the Massachusetts Mercury dated 10 June, 1800.

Early Development of Auditory-Verbal and Visual-Spatial Short-Term Memory: Age and Sex Effects

Memory is a multi-component cognitive ability to retain and retrieve information presented in different modalities. Research on memory development has shown that the memory capacity and the processes improve gradually from early childhood to adolescence. Findings related to the sex-differences in memory abilities in early childhood have been inconsistent. Although previous research has demonstrated the effects of the modality of stimulus presentation (auditory versus verbal) and the type of material to be remembered (visual/spatial versus auditory/verbal) on the memory processes and memory organization, the recent research with children is rather limited. The present study is a secondary analysis of data, originally collected from 530 typically developing Turkish children and adolescents. The purpose of the present study was to examine the age-related developments and sex differences in auditory-verbal and visual-spatial short-term memory (STM) in 177 typically developing male and female children, 5 to 8 years of age. Dot-Locations and Word-Lists from the Children's Memory Scale were used to measure visual-spatial and auditory-verbal STM performances, respectively. The findings of the present study suggest age-related differences in both visual-spatial and auditory-verbal STM. Sex-differences were observed only in one visual-spatial STM subtest performance. Modality comparisons revealed age- and task-related differences between auditory-verbal and visual-spatial STM performances. There were no sex-related effects in terms of modality specific performances. Overall, the results of this study provide evidence of STM development in early childhood, and these effects were mostly independent of sex and the modality of the task.

Letters to Reverend William Proudfoot, 1823, 1842-1843, 1846

A 2 ½ page letter addressed to The Editor of the Presbyterian Magazine, care of [illegible], London, C.W. The writer describes the Village of Chippawa and its location in Ontario. He writes that there are many people there of Scotch [Scottish] descent. He says that a congregation was formed and 39 names were on the roll. The letter is from J.P. [John Porteous] with an added note from Wm. Porteous. The letter is from St. Catharines. There is one postmark – St. Catharines, April 6, 1823 A 1 ½ page letter addressed to Rev. W. Proudfoot, Ed. Of Presbyterian Mag., London, C.W. This letter is from Walter Mitchell in St. Catharines. He sends a list of peoples’ names and the amounts that they have paid toward the Presbyterian Magazine. Mr. Mitchell is acting as an agent for the magazine. This letter has 1 postmark – St. Catharines, Sept. 13, 1842 A 2 page letter addressed to Rev. W. Proudfoot, London, C.W. This letter is from John Jennings of St. Catharines. The writer claims that he is ill but he makes plans to meet Reverend Proudfoot in Toronto in order to go to a meeting in Rochester. The writer expects that Reverend Proudfoot will preach in Rochester. The letter has 1 postmark – St. Catharines, Aug. 14, 1843. A 2 page letter addressed to The Rev. Professor Proudfoot, London, C.W. from John Porteaus of St. Catharines. The writer says that he will not preach in Detroit. He says that the people of Detroit are expecting Mr. Dalrymple [who was sent as a missionary to Canada from Scotland in 1846] and also, he doesn’t want to leave his congregation for 2 Sabbaths. The letter has 2 postmarks – St. Catharines, August 1846 [this postmark is very faint] and Hamilton, August 2, 1846.

Optimizing Computational Frameworks to Study the Influence of the Protein Environment on the Individual Site Energies of Chromophores in Photosystem II of Photosynthesis

Photosynthesis is a process in which electromagnetic radiation is converted into chemical energy. Photosystems capture photons with chromophores and transfer their energy to reaction centers using chromophores as a medium. In the reaction center, the excitation energy is used to perform chemical reactions. Knowledge of chromophore site energies is crucial to the understanding of excitation energy transfer pathways in photosystems and the ability to compute the site energies in a fast and accurate manner is mandatory for investigating how protein dynamics ef-fect the site energies and ultimately energy pathways with time. In this work we developed two software frameworks designed to optimize the calculations of chro-mophore site energies within a protein environment. The first is for performing quantum mechanical energy optimizations on molecules and the second is for com-puting site energies of chromophores in a fast and accurate manner using the polar-izability embedding method. The two frameworks allow for the fast and accurate calculation of chromophore site energies within proteins, ultimately allowing for the effect of protein dynamics on energy pathways to be studied. We use these frame-works to compute the site energies of the eight chromophores in the reaction center of photosystem II (PSII) using a 1.9 Å resolution x-ray structure of photosystem II. We compare our results to conflicting experimental data obtained from both isolat-ed intact PSII core preparations and the minimal reaction center preparation of PSII, and find our work more supportive of the former.

Letter to William Dickson from John Strachan

Letter to William Dickson from John Strachan. This letter is marked “private”. Mr. Strachan requests that Mr. Dickson come to England to help them “re-invent” the clergy reserves in the Queen and Parliament. The plan is to give 1/3 to the Church of England, 1/3 to the Church of Scotland and 1/3 to the Methodists (1 ¼ pages, handwritten), March 13, 1839.