Ornitho-theologia

Osa 2 ilm. 1754, prees. Pehr Kalm

De distinguendo in doctrina morali

Dedicatio: Henricus Forsius, Hedvig Forsius s. Malm [ruots. pr.].

Öfwer Pedersöre sokn i Österbotn

Osa 2 ilm. 1766, prees. Hans Henric Aspegren, resp. Gabriel Aspegren d. y.

Crux eruditorum origo mali

Invocatio: [Alpha kai Omega].

De consensu sponsalitio

Invocatio: Q.B.V.

De juramentis

Invocatio: S.A.D.

Threni Jeremiae latine versi notisque explicati

Dedicatio: Axel Renaud de Cedercreutz, Sophie de Cedercreutz s. Svedenstjerna [ransk. pr.].

De fulmine

Invocatio: Deo Duce.

Causae haemorrhagiae e cadavere hominis violenter occisi naturales

Dedicatio: Johannes Gezelius nuor., Johannes Gråå, Andreas Bergius, Bartholdus Rajalenius, Simon Polviander, Martinus Gråå, Christ. Walstenius, Nicolaus Barck, Ericus Thomaeus, Johannes Gråå, Henricus Malm.

Om sättet at rätt tracktera historia naturalis

Invocatio: M.G.H.

De eloqventia veterum

Invocatio: B.C:D.

De jure principis circa conscientiam civium erroneam

Invocatio: I.N.J.C.

Bioconcentração e biomagnificação de metilmercúrio na baía de Guanabara, Rio de Janeiro

Methylmercury was determined in water and aquatic biota from Guanabara Bay. Trophic transfer of methylmercury was observed between trophic levels from prey (microplankton, mesoplankton and fish with different feeding habits) to top predator (pelagic demersal fish). Top predator fish presented the highest methylmercury concentrations (320.3 ± 150.7 mg kg-1 dry wt.), whereas microplankton presented the lowest (8.9 ± 3.3 mg kg-1 dry wt.). The successive amplification of methylmercury concentrations and its bioconcentration factor with increasing trophic levels from base to top indicate that biomagnification may be occurring along the food web. Results suggest the importance of feeding habits and trophic level in the bioaccumulation of methylmercury by aquatic biota.

METODOLOGIAS DE COLETA, PRESERVAÇÃO E ARMAZENAMENTO DE AMOSTRAS DE ÁGUA PARA ANÁLISE DE MERCÚRIO - UMA REVISÃO

Knowing the mercury levels of an environment allows a diverse array of biogeochemical studies into the mercury cycle on a local or global scale. Among matrices commonly evaluated, water remains a challenge for research because its mercury levels can be very low, requiring development of complex analytical protocols. Currently, sample preservation methods, protocols that avoid contamination, and analytical techniques with low detection limits allow analysis of mercury in pristine waters. However, different protocols suggest different methods depending on a range of factors such as the characteristics of water sampled and storage time. In remote areas, such as oceanic and Amazonian regions, sample preservation and transport to a laboratory can be difficult, requiring processing of the water during the sampling expedition and the establishment of a field laboratory. Brazilian research on mercury in water can be limited due to difficulty obtaining reagents, lack of laboratory structure, qualified personnel, and financial support. Considering this complexity for analyzing water, we reviewed methodologies for sampling, preservation, and storage of water samples for analysis of the most commonly evaluated mercury species (dissolved gaseous mercury, reactive mercury, methylmercury and total mercury).