B/Ca ratios in planktonic foraminifera

Boron isotope systematics indicate that boron incorporation into foraminiferal CaCO3 is determined by the partition coefficient, KD = [B/Ca](CaCO3)/[B(OH)4**-/HCO3**-](seawater), and [B(OH)4?/HCO3?](seawater), providing, in principle, a method to estimate seawater pH and PCO2. We have measured B/Ca ratios in Globigerina bulloides and Globorotaliainflata for a series of core tops from the North Atlantic and the Southern Ocean and in Globigerinoides ruber (white) from Ocean Drilling Program (ODP) site 668B on the Sierra Leone Rise in the eastern equatorial Atlantic. B/Ca ratios in these species of planktonic foraminifera seem unaffected by dissolution on the seafloor. KD shows a strong species-specific dependence on calcification temperature, which can be corrected for using the Mg/Ca temperature proxy. A preliminary study of G. inflata from Southern Ocean sediment core CHAT 16K suggests that temperature-corrected B/Ca was ~30% higher during the last glacial. Correspondingly, pH was 0.15 units higher and aqueous PCO2 was 95 ?atm lower at this site at the Last Glacial Maximum. The covariation between reconstructed PCO2 and the atmospheric pCO2 from the Vostok ice core demonstrates the feasibility of using B/Ca in planktonic foraminifera for reconstructing past variations in pH and PCO2.

Chromogranin B (secretogranin I) promotes sorting to the regulated secretory pathway of processing intermediates derived from a peptide hormone precursor.

Chromogranin B (CgB, secretogranin I) is a widespread constituent of neuroendocrine secretory granules whose function is unknown. To determine whether CgB affects the sorting of peptide hormone and neuropeptide precursors to secretory granules, we overexpressed CgB in AtT-20 cells, which exhibit an only moderate capacity to sort proopiomelanocortin and proteolytic fragments derived therefrom. In mock-transfected AtT-20 cells, a substantial proportion of newly synthesized proopiomelanocortin and its two primary proteolytic products generated in the trans-Golgi network, the N-terminal 23-kDa fragment containing adrenocorticotropin and the C-terminal beta-lipotropin fragment, was secreted via the constitutive pathway. Two- to three-fold overexpression of CgB markedly reduced the constitutive secretion of the 23-kDa fragment, but not beta-lipotropin and tripled the amount of adrenocorticotropin generated and stored in secretory granules. Our results indicate the existence of neuroendocrine-specific helper proteins which promote the sorting from the trans-Golgi network to secretory granules of certain processing intermediates derived from peptide hormone and neuropeptide precursors and demonstrate that CgB functions as such.

Reports of the Princeton University Expeditions to Patagonia, 1896-1899 : J.B. Hatcher in charge /

At head of title: J. Pierpont Morgan Publication Fund.

Cuchulain of Muirthemme: the story of the men of the Red Branch of Ulster;

Mode of access: Internet.

University education in Ireland and "ultramontanism" : being an examination of arguments lately published by James L. Whittle, A.B., Trinity College, Dublin, G.E. Cairnes, M.A., professor, Queen's College, Galway, and Sir Dominick Corrigan, Bart. /

Mode of access: Internet.

Plays for an Irish theatre /

v. 1. Where there is nothing -- v. 2. Hour-glass; Cathleen Ni Hoolihan; Pot of broth -- v. 3. King's threshold; On Baile's strand.

The Countess Cathleen /

Fifteenth impression, 1924.

Plays for an Irish theatre : v. 1.

Publisher varies.

The new realism: coöperative studies in philosophy by Edwin B. Holt,

Introduction.--The emancipation of metaphysics from epistemology, by W. T. Marvin.--A realistic theory of independence, by R. B. Perry.--A defense of analysis, by E. G. Spaulding.--A realistic theory of truth and error, by W. P. Montague.--The place of illusory experience in a realistic world, by E. B. Holt.--Some realistic implications of biology, by W. B. Pitkin.--Appendix: Program and first platform of six realists (reprinted from the J. of phil., psychol., etc., 1910, 7, 393) Montague on Holt; Holt on Montague; Pitkin on Montague and Holt.

Gitanjali (song offerings)

Listed in the Report of the India society for 1914 as a publication with which the society has been associated.

Irish fairy and folk tales, ed.

Mode of access: Internet.

Fairy and folk tales of the Irish peasantry /

Variant issue: series title on half title; errata slip inserted at p. [ix].

Responsibilities, and other poems,

Mode of access: Internet.

The poetical works /

Mode of access: Internet.

The Celtic twilight. Men and women,

Photocopy.