Någre philosophiske tankar

Arkit: )(4.

Om skidfrukts-wäxter och legumer

Invocatio: M.G.H.

Tankar om informations-werket i Österbotn

Invocatio: M.G.H.

Om det wärde, hwaruti oeconomien blifwit hållen af åtskilliga gamla folkslag

Invocatio: I.J.N.

Historisk och oeconomisk beskrifning öfwer Somero sockn med wederbörandes tilstånd

Invocatio: I.J.N.

Strödda anmärkningar uti philosophien

Invocatio: I G.N.

De usu physices in philosophia practica

Invocatio: G.A.

Om förgiftiga wäxter i gemen

Invocatio: M.G.H.

Uskon asia, tai sitten ei

Kirjallisuusarvostelu

Ihmisluonto ja 1700-luvun yhteiskunta

Kirjallisuusarvostelu

Huono lintukirja!

Kirjallisuusarvostelu

SEASONAL CHEMICAL COMPOSITIONS OF THE ESSENTIAL OILS OF TWOEugenia SPECIES AND THEIR ACARICIDAL PROPERTIES

The leaf essential oils of Eugenia lutescens Cambess andEugenia langsdorffii O. Berg, collected in the rainy (RS) and dry seasons (DS), were extracted by hydrodistillation and then characterized by a gas chromatography-flame ionization detector and a gas chromatography-mass spectrometer. The potential acaricidal activity and oviposition deterrence of these oils were evaluated against Tetranychus urticae . The oil yields were higher in the RS for E. lutescens, while those forE. langsdorffii were higher in the DS. α-Pinene and β-pinene were determined to be the major constituents of the oils fromE. lutescens, while bicyclogermacrene, spathulenol, and β-caryophyllene predominated in E. langsdorffii . Seasonal variations in the oils were primarily related to chemical diversity, and E. lutescens was more affected than was E. langsdorffii . The E. langsdorffii oil collected in the DS was most toxic to the spider mite, while the oils of E. lutescens and E. langsdorffii collected in the RS drastically reduced its egg quantities. This study successfully determined the periods of greater oil production and acaricidal activity.

Teologiasta geologiaan

Kirjallisuusarvostelu

Resistência à corrosão das fases presentes em amálgamas dentários

Neste trabalho avaliou-se a resistência à corrosão em solução salina das fases presentes na microestrutura de amálgamas dentários comerciais: gama1-Ag2Hg3, o eutético Ag-Cu e gama2-Sn7-8Hg, empregando-se técnicas eletroquímicas de potencial a circuito aberto com o tempo, de polarização potenciodinâmica e de espectroscopia de impedância eletroquímica. As ligas metálicas em estudo já foram caracterizadas em um trabalho prévio, por meio de microscopia eletrônica de varredura e difratometria de raios X. A resistência à corrosão se origina da formação de filmes passivos na superfície metálica e parece estar determinada pela natureza rugosa e porosa das superfícies.

Jatkoa kimmoisuuteen

Kirjallisuusarvostelu