"Polly Peachum"; the story of "Polly" and "The beggar's opera,"

Mode of access: Internet.

'Dancing at the English Opera':'Marie Salle's letter to the Duchess of Richmond

A letter from dancer Marie Salle to her patroness dated 1731 reveals her ambitions to dance at the English opera.

Photo-Fenton degradation kinetics of low ciprofloxacin concentration using different iron sources and pH

The aim of the present study was to compare the degradation kinetics of low (1 mg L-1) and high (25 mg L-1) concentrations of ciprofloxacin (CIP) aiming to decrease the concentration of additives and evaluate the pH limitation by the use of low iron concentrations and organic ligands. A parameterized kinetic model was satisfactorily fitted to the experimental data in order to study the performance of photo-Fenton process with specific iron sources (iron citrate, iron oxalate, iron nitrate) under different pH medium (2.5, 4.5, 6.5). The process modeling allowed selecting those process conditions (iron source, additives concentrations and pH medium) which maximize the two performance parameters related to the global equilibrium conversion and kinetic rate of the process. For the high CIP concentration, degradation was very influenced by the iron source, resulting in much lower efficiency with iron nitrate. At pH 4.5, highest TOC removal (0.87) was achieved in the presence of iron citrate, while similar CIP conversions were obtained with oxalate and citrate (0.98 after 10 min). For the low CIP concentration, much higher conversion was observed in the presence of citrate or oxalate in relation to iron nitrate up to pH 4.5. This behavior denotes the importance of complexation also at low dosages. Appropriate additives load (320 μM H 2O2; 6 μM Fe) resulted in a CIP conversion of 0.96 after10 min reaction with citrate up to pH 4.5. © 2013 Elsevier B.V. All rights reserved.

Integration of processes induced air flotation and photo-Fenton for treatment of residual waters contaminated with xylene

Produced water in oil fields is one of the main sources of wastewater generated in the industry. It contains several organic compounds, such as benzene, toluene, ethyl benzene and xylene (BTEX), whose disposal is regulated by law. The aim of this study is to investigate a treatment of produced water integrating two processes, i.e., induced air flotation (IAF) and photo-Fenton. The experiments were conducted in a column flotation and annular lamp reactor for flotation and photodegradation steps, respectively. The first order kinetic constant of IAF for the wastewater studied was determined to be 0.1765 min(-1) for the surfactant EO 7. Degradation efficiencies of organic loading were assessed using factorial planning. Statistical data analysis shows that H2O2 concentration is a determining factor in process efficiency. Degradations above 90% were reached in all cases after 90 min of reaction, attaining 100% mineralization in the optimized concentrations of Fenton reagents. Process integration was adequate with 100% organic load removal in 20 min. The results of the integration of the IAF with the photo-Fenton allowed to meet the effluent limits established by Brazilian legislation for disposal. (C) 2011 Elsevier B.V. All rights reserved.

Lavinia Fenton, Brustbild

Signatur des Originals: S 36/G03004

The Duchess of Nourttumland [Material gráfico]

Resumen: Descripción: retrato de la Duquesa de tres cuartos y mirando ligeramente hacia la derecha, elegantemente vestida y con sombrero.

Quarter bill book for the Classes of 1720-1760, 1720-1756

Parchment hardcover bound volume containing quarter bill tallies for the Classes of 1720-1760 arranged by seniority, and covering the bill period ending on June 10, 1720 through the period ending December 10, 1756. After each quarter's tallies, an additional section provides the totals for all students in each of the categories, and deductions for building repairs.

Catalogue of freshmen, 1760

List of the matriculating members of the Harvard Class of 1764.

The youth of the Duchess of Angoulême,

Mode of access: Internet.

The grand duchess of Gerolstein : a comic opera in three acts /

French & English in parallel columns.

The Jacobites and the union, being a narrative of the movements of 1708, 1715, 1719,

Mode of access: Internet.

A grand duchess : the life of Anna Amalia, duchess of Saxe-Weimar-Eisenach and the classical circle of Weimar /

Includes index.

Beatrice d'Este, duchess of Milan, 1475-1497; a study of the renaissance,

Mode of access: Internet.

An interesting letter to the Duchess of Devonshire.

On the influence of the female character in society.

Duchess of Berri in La Vendée; comprising a narrative of her adventures, with her private papers and secret correspondence.

Mode of access: Internet.