534 resultados para Gâmetas de dador - Gamete donation


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The bound notebook contains academic texts copied by Harvard student Jonathan Trumbull in 1724 and 1725. The volume includes transcriptions of Harvard Instructor Judah Monis' Hebrew Grammar, Tutor William Brattle's Compendium of Logic, and Fellow Charles Morton's Natural Logic.

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One letter offering Harvard President Kirkland a donation of 100 dollars to acquire a "handsome Christening Cup or Baptismal Basin" for the new College Church, which held services in University Hall.

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One-page typed document reflecting the donation of the Holyoke Caudle Cup by Charlotte A. Hedge in 1903. Provenance information is also included. There is a handwritten note at the bottom of the page regarding the cup’s inclusion in an exhibition catalog published by the Boston Museum of Fine Arts.

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Black and white composition book sent to the Harvard College Library containing a typed "copy of notes made in the spring of 1886" by John H. Buck. Includes historical information, and physical descriptions and valuations of the Great Salt, the Stoughton Cup, the Browne Cup, and the christening basin acquired with the donation of Oliver Wendell, as well as notes on other gifts of silver.

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One-page handwritten letter from William Ashurt to President Leverett discussing the annual payment on an unspecified donation, and the progress of the Hopkins' bequest recovery. The folder also contains a handwritten 19th century copy of the letter.

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This collection contains various manifestations of a humorous poem, most often called "Lines upon the late proceedings of the College Government," written by classmates John Quincy Adams and John Murray Forbes in 1787. Both Adams and Forbes were members of the class of 1787, and the poem recounts events surrounding the pranks and ensuing punishment of two members of the class behind them, Robert Wier and James Prescott. Wier and Prescott had been caught drinking wine and making "riotous noise," and they were publicly reprimanded by Harvard President Joseph Willard and several professors and tutors, including Eliphalet Pearson, Eleazar James, Jonathan Burr, Nathan Read, and Timothy Lindall Jennison. The poem mocks these authority figures, but it spares Samuel Williams, whom it suggests was the only professor to find their antics humorous.

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Contains instructions for preparing and administering medicine for adults and children, and generalized uses for certain ingredients, written by Dr. Francis Kittredge. Preparations include ointment for scurvy, bone ointment, nerve ointments, procedures to soothe a sore mouth and to stop excessive bleeding, and treatment to kill worms. The materials used to prepare bone ointment include fresh butter, hog fat, chamomile, garlic, and night shade, among other ingredients. The recipe for “simple nerve ointment” instructs the preparer to simmer half a pint of neet foot oil, a pint of rum, and one jell of oil of turpentine over a “gentle fire.” Kittredge writes that oil of St. John’s Wort is effective in treating swelling of the legs, for cold and aches, and for burning and scalds, while oil of Elderflower is indicated for belly aches. The manuscript is housed in a binding created by the Harvard Medical School library. Tipped into the binding is one letter from Frederick O. West, M.D., Harvard Medical School, Boston, Massachusetts, that accompanied his donation of the Kittredge receipt book to the library in 1919. There is also one letter of unknown provenance enclosed with the receipt book, which contains an inventory of the estate of Antipas Brigham, of Grafton, Massachusetts, signed by Worcester County Judge Joseph Wilder on 7 November 1749. It is unclear if this letter has any connection to Frederick O. West or Francis Kittredge.

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Correspondence regarding the donation of several collections to the Boston Medical Library, including the John Winthrop papers

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Trabalho Final do Curso de Mestrado Integrado em Medicina, Faculdade de Medicina, Universidade de Lisboa, 2014

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The planktonic diatom Fragilariopsis kerguelensis plays an important role in the biogeochemical cycles of the Southern Ocean, where remains of its frustules form the largest deposit of biogenic silica anywhere in the world. We assessed the genetic identity of 26 strains, from cells collected at various sites in the Southern Ocean, using three molecular markers, LSU and ITS rDNA and rbcL. The LSU sequences were identical among the tested strains, ITS sequences were highly similar, and only one base pair difference was detected among the rbcL sequences. These results, together with a large number of successful mating experiments demonstrated that the strains belong to a single biological species. We investigated the mating system and life cycle traits of F. kerguelensis. Cell size diminished gradually in clonal strains. Gamete formation only occurred when strains of opposite mating type - within a cell size range of 7-36 µm - were mixed together. Two binucleate gametes were formed in each gametangium and gamete conjugation produced a zygote that had four nuclei and was surrounded by thin siliceous scales. Two out of the four nuclei subsequently degenerated and the zygote expanded to form an auxospore surrounded by a transverse and a longitudinal perizonium. Staining with the fluorochrome PDMPO provided for the first time a clear demonstration that the longitudinal perizonium is formed after auxospore expansion is complete. Initial cells produced within the mature auxospores were 78-101 µm in length. Various authors have shown that the average valve size of F. kerguelensis varies in sediment samples collected in regions and seasons with different primary production regimes and this parameter has thus been proposed as a biological proxy for palaeo-productivity. A better understanding of the life cycle of F. kerguelensis should help the design of future investigations aimed at testing the link between cell size distribution in the natural environment and the role that environmental factors might have in the regulation of population cell size.

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Dinoflagellate cysts are useful for reconstructing upper water conditions. For adequate reconstructions detailed information is required about the relationship between modern day environmental conditions and the geographic distribution of cysts in sediments. This Atlas summarises the modern global distribution of 71 organicwalled dinoflagellate cyst species. The synthesis is based on the integration of literature sources together with data of 2405 globally distributed surface sediment samples that have been preparedwith a comparable methodology and taxonomy. The distribution patterns of individual cyst species are being comparedwith environmental factors that are knownto influence dinoflagellate growth, gamete production, encystment, excystment and preservation of their organic-walled cysts: surface water temperature, salinity, nitrate, phosphate, chlorophyll-a concentrations and bottom water oxygen concentrations. Graphs are provided for every species depicting the relationship between seasonal and annual variations of these parameters and the relative abundance of the species. Results have been compared with previously published records; an overview of the ecological significance as well as information about the seasonal production of each individual species is presented. The relationship between the cyst distribution and variation in the aforementioned environmental parameters was analysed by performing a canonical correspondence analysis. All tested variables showed a positive relationship on the 99% confidence level. Sea-surface temperature represents the parameter corresponding to the largest amount of variance within the dataset (40%) followed by nitrate, salinity, phosphate and bottom-water oxygen concentration, which correspond to 34%, 33%, 25% and 24% of the variance, respectively. Characterisations of selected environments as well as a discussion about how these factors could have influenced the final cyst yield in sediments are included.

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"Two thousand copies of this volume have been printed."

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"September 1993."--P. [5].

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Reports for <1997- > also called <34d- >.