Historia doctrinae de affinitatibus chemicis

Arkit: 1 arkintunnukseton lehti, E-F4.

Tavastlands mineral-historia

Invocatio: M.G.H.

Tavastlands mineral-historia

Invocatio: M.G.H.

Ambiental volatile organic compounds in the megacity of São Paulo

In order to characterize the composition of the main urban air organic compounds in the megacity of Sao Paulo, analysis of samples collected during the winter of 2003 downtown was carried out. The samplings were performed on the roof of a building in the commercial center of São Paulo. Hydrocarbons and carbonyls compounds were collected on August 4, 5 and 6. Comparing to previous data, the concentration of hydrocarbons presented no decrease in the concentration, except for the aldehydes, which decreased when compared to previous data. Among the HCs species analyzed, the highest concentrations observed were those of toluene (7.5 ± 3.4 ppbv), n-decane (3.2 ± 2.0 ppbv), benzene (2.7 ± 1.4 ppbv) and 1,3,5-trimethylbenzene (2.2 ± 1.5 ppbv).

Historia Regiae Academiae Aboensis

Invocatio: I.N.J.C.

Österbotns mineral-historia

Invocatio: M.G.H.

Israelitiska oeconomiens historia

Inv: I.J.N.

Momenta quaedam praecipua locorum et temporum, in historia literarum et artium observanda

Dedicatio: Jacob Sporman [ruots. pr.], Anna Sporman s. Schulin [ruots. pr.].

Experimento didático sobre cromatografia gasosa: uma abordagem analítica e ambiental

This paper describes an experiment to teach the principles of gas chromatography exploring the boiling points and polarities to explain the elution order of a series of alcohols, benzene and n-propanone, as well as to teach the response factor concept and the internal standard addition method. Retention times and response factors are used for qualitative identification and quantitative analysis of a hypothetical contamination source in a simulated water sample. The internal standard n-propanol is further used for quantification of benzene and n-butanol in the water sample. This experiment has been taught in the instrumental analysis course offered to chemistry and oceanography students.

Lisez-moi Historia

1936/07/05 (N57)-1936/11/05.

Lisez-moi Historia

1936/01/05 (N45)-1936/06/20.

Lisez-moi Historia

Variante(s) de titre : Lisez-moi historique

Salir de la escuela: entre la tradición y la educación ambiental para la sostenibilidad = Excursions from school: between tradition and environmental education for sustainability

Las actividades escolares fuera del centro constituyen una marca de calidad del pasado y del presente educativo, y tienen que seguir siéndolo en el futuro. A partir de una investigación cualitativa se identifican las razones aducidas por enseñantes para salir del aula y, con ejemplos concretos, quedan plasmados algunos de los objetivos perseguidos, así como otros que se añaden a la propia actividad. Se identifican salidas vivenciales y otras más experimentales, se reconocen valores positivos, pero también se echa en falta un trabajo más coherente con los principios actuales de la educación ambiental. Precisamente esta educación es la propuesta como el camino a seguir para renovar objetivos, técnicas y procedimientos para salir del aula