Sediment and organic matter properties, and molecular formula from sampling locations in the Northern Black Sea

Remineralization of organic matter in reactive marine sediments releases nutrients and dissolved organic matter (DOM) into the ocean. Here we focused on the molecular-level characterization of DOM by high-resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) in sediment pore waters and bottom waters from contrasting redox regimes in the northern Black Sea with particular emphasis on nitrogen-bearing compounds to derive an improved understanding of the molecular transformations involved in nitrogen release. The number of nitrogen-bearing molecules is generally higher in pore waters than in bottom waters. This suggests intensified degradation of nitrogen-bearing precursor molecules such as proteins in anoxic sediments: No significant difference was observed between sediments deposited under oxic vs anoxic conditions (average O/C ratios of 0.55) suggesting that the different organic matter quality induced by contrasting redox conditions does not impact protein diagenesis in the subseafloor. Compounds in the pore waters were on average larger, less oxygenated, and had a higher number of unsaturations. Applying a mathematical model, we could show that the assemblages of nitrogen-bearing molecular formulas are potential products of proteinaceous material that was transformed by the following reactions: (a) hydrolysis and deamination, both reducing the molecular size and nitrogen content of the products and intermediates; (b) oxidation and hydration of the intermediates; and (c) methylation and dehydration.

Termination of the bracero program : some effects on farm labor and migrant housing needs /

Cover title.

Regulatory water quality monitoring networks : statistical and economic considerations /

Mode of access: Internet.

A handbook on scrap futures markets and futures trading /

Mode of access: Internet.

The partnership : space shuttle, space science, and space station /

Mode of access: Internet.

Birds of Lassen Volcanic National Park and vicinity /

Includes index.

Confederate hand-book; a compilation of important data and other interesting and valuable matter relating to the war between the states, 1861-1865.

Dedication and introduction signed: Robt. C. Wood.

The processing and properties of Hastelloy C /

"May 1964."

The early literary career of Robert Browning; four lectures.

From the library of T. L. Hood, with his marginal notes.

The Spirit of the public journals : being an impartial selection of the most exquisite essays and jeux d'esprits, principally prose, that appear in the newspapers and other publications.

Half wine colored calf, original paper label preserved at the end, top edges gilt, and others trimmed.

The terms of communion at the Lord's table, and with the church of Christ.

Mode of access: Internet.

Research in nonlinear structural and solid mechanics : keynote address and panel discussion presented at a symposium sponsored by NASA Langley Research Center, Hampton, Virginia, and the George Washington University, Washington, D.C., in cooperation with the National Science Foundation, the American Society of Civil Engineers, and the American Society of Mechanical Engineers, and held at Washington, D.C., October 6-8, 1980 /

Includes bibliographical references.

Mallow and asphodel.

Poems.

Unitarianism, its origin and history : a course of sixteen lectures /

Introduction. [Signed: H.G.S.]--Early Christian doctrine. By J.H. Allen.--Christianity from the fifth to the fifteenth century. By A.P. Peabody.--Unitarianism and the reformation. By S.C. Beach.--Unitarianism in England. By B. Herford.--The contact of American Unitarianism and German thought. By J.H. Allen.--The church and the parish in Massachusetts. Usage and law. By G.E. Ellis.--Early New England Unitarians. By A.P. Peabody.--Channing. By G.W. Briggs.--Transcendentalism: the New England renaissance. By F. Tiffany.--Theodore Parker. By S.B. Stewart.--Unitarianism and modern literature. By F. Hornbrooke.--Unitarianism and modern Biblical criticism. By J. de Normandie.--Unitarianism and modern scientific thought. By T.R. Slicer.--The law of righteousness. By G. Batchelor.--The relation of Unitarianism to philosophy. By C.C. Everett.--Ecclesiastical and denominational tendencies. By G. Reynolds.

The Argonautica. With an English translation by R.C. Seaton.

Mode of access: Internet.