Les Chantiers de l'Exposition universelle de 1889 : revue bi-mensuelle du commerce et des industries se rattachant à l'Exposition

1887/08/01 (A1,N8).

Les Chantiers de l'Exposition universelle de 1889 : revue bi-mensuelle du commerce et des industries se rattachant à l'Exposition

1887/08/15 (A1,N9).

Les Chantiers de l'Exposition universelle de 1889 : revue bi-mensuelle du commerce et des industries se rattachant à l'Exposition

1888/03/01 (A2,N20).

Les Chantiers de l'Exposition universelle de 1889 : revue bi-mensuelle du commerce et des industries se rattachant à l'Exposition

1888/09/15 (A2,N34)-1888/10/01.

Corrosão metálica associada ao uso de combustíveis minerais e biocombustíveis

Fuels and biofuels have a major importance in the transportation sector of any country, contributing to their economic development. The utilization of these fuels implies their closer contact to metallic materials, which comprise vehicle, storage, and transportation systems. Thus, metallic corrosion could be related to fuels and biofuels utilization. Specially, the corrosion associated to gasoline, ethanol, diesel, biodiesel, and their mixtures is discussed in this article. Briefly, the ethanol is the most corrosive and gasoline the least. Few investigations about the effect of biodiesel indicate that the corrosion is associated to their unsaturation degree and the corrosion of diesel is related to its acidity.

Determinação de corantes marcadores do tipo azo e antraquinona em combustíveis por cromatografia líquida com detecção eletroquímica

An analytical method based on high-performance liquid chromatography with electrochemical detection has been developed and applied to the determination of Solvent blue 14 (SA-14) and Solvent red 24 (SV-24) in fuel samples. The dyes were better separated on C18 column, using a mobile phase composed of acetonitrile and ammonium acetate (90:10, v/v). Detection was carried out at an oxidation potential of +0.85V. The detector response was linear at concentration range of 7.50×10-8 - 1.50×10-6 mol L-1 (r = 0.997) for SA-14 and SV-24, respectively. The method was used to quantify these dyes in fuels samples with satisfactory accuracy and precision.

Preparo de amostras de combustíveis fósseis por piroidrólise para a determinação de flúor e cloro

Pyrohydrolysis is proposed for fossil fuels sample preparation for further fluorine and chlorine determination. Samples were heated during 10 min at temperatures up to 1000 °C. Water vapor was passed through the reactor and the volatile products were condensed and collected in NH4OH solution. Fluoride was determined by potentiometry using an ion selective electrode (ISE) and Cl by ICP OES and DRC-ICP-MS. The results are in good agreement with certified values and the precision is better than 10% (n = 4). Sample preparation by means of pyrohydrolysis is relatively simple, whereas chlorine and fluorine can be determined at low concentrations.

Pilhas de combustíveis microbianas utilizadas na produção de eletricidade a partir de rejeitos orgânicos: uma perspectiva de futuro

In this review is presented an innovative technology for use of animal and vegetable waste with high pollution levels in microbial fuel cell (MFC) as an alternative to waste remediation and simultaneously producing electricity and fertilizer for agriculture. A brief history of MFC, the studies about the electron transfer mechanisms, discussion of the biological nanowires in bacteria and the use of chemical mediators or carriers of electrons are explained. The factors influencing the performance of MFCs, the application in waste and sewage treatment and power generation are also discussed.

L'Enfant de Barbapoux : le seul journal du front édité par des combattants : revue... humoristique... ballot... tante... bi-mensuelle

Etat de collection : 1918 (n° 7, févr.)

L'Enfant de Barbapoux : le seul journal du front édité par des combattants : revue... humoristique... ballot... tante... bi-mensuelle

1918/02 (N7).

Corantes marcadores de combustíveis: legislação e métodos analíticos para detecção

The use of dyes in the commercialization of fuel is usually associated with protection of the source and destination. It is used as "markers" to identify and guarantee the identity of the specific product of a particular manufacturer to discourage theft, tampering and disclosure of the quality of solvent or fuel. This work presents a critical analysis on the state of the art about the available analytical methods for identification and quantification of dyes used as markers of solvents and fuels, as well as evaluation of the physical-chemical staining and laws surrounding their use and commercialization.

La Femme : journal bi-mensuel

1888/12/15 (A10,N24).

La Femme : journal bi-mensuel

1900/01/01 (A22,N1).

La Femme : journal bi-mensuel

1881/09/01 (A3,N17).

La Femme : journal bi-mensuel

1888/04/01 (A10,N7).