Veritas religionis evangelicae ex scriptis gentilium adserta

Invocatio: I.N.J.C.

De usu, qvem ex scientia naturali in exercitio potestatis suae imperans capere potest

Invocatio: I.N.J.

Caussae quaedam probabiles fructus, ex concionibus sacris minus percepti

Invocatio: I.N.D O.M.

Hópla deksià kaì aristerá [kreikkaa] ex occasione 2 Cor. VI: v.7

Invocatio: [hepreaa].

De [hepreaa] ex Nehem. 8:4

Invocatio: [hepreaa].

Analytical procedures for determining Pb and Sr isotopic compositions in water samples by ID-TIMS

Few articles deal with lead and strontium isotopic analysis of water samples. The aim of this study was to define the chemical procedures for Pb and Sr isotopic analyses of groundwater samples from an urban sedimentary aquifer. Thirty lead and fourteen strontium isotopic analyses were performed to test different analytical procedures. Pb and Sr isotopic ratios as well as Sr concentration did not vary using different chemical procedures. However, the Pb concentrations were very dependent on the different procedures. Therefore, the choice of the best analytical procedure was based on the Pb results, which indicated a higher reproducibility from samples that had been filtered and acidified before the evaporation, had their residues totally dissolved, and were purified by ion chromatography using the Biorad® column. Our results showed no changes in Pb ratios with the storage time.

Theoremata nonnulla ex amplissimo philosophiae agro deprompta

Painovuosi nimekkeestä.

De moribus gentium ex lingua earundem aestimandis

Invocatio: I.N.J.C.

Utilitates, qvae ex commerciis & coloniis in calidioribus mundi partibus patriae adfluerent

Painovuosi nimekkeestä.

Estudo fitoquímico das cascas das raízes de Zanthoxylum rigidum Humb. & Bonpl. ex Willd (Rutaceae)

Chemical investigation from root barks of Z. rigidum, resulted in the isolation of lupeol, a mixture of steroids campesterol, sitosterol, stigmasterol, sacarose, hesperidin, N-methylatanine and 6-acetonyldihydrochelerythrine. Their structures were established by spectral data analysis. No previous work has been reported on Z. rigidum species.

Atividade antioxidante de extratos e taninos condensados das folhas de Maytenus ilicifolia Mart. ex Reiss.

Maytenus ilicifolia (Celastraceae) is a native plant of South America and popularly known as "espinheira-santa". The aim of this study was to evaluate the antioxidant capacity of extracts and isolated compounds from this plant. The antioxidant activity of the crude and semipurified extracts and isolated compounds was evaluated through DPPH-radical and phosphomolybdenum-complex assays. By both methods, the ethyl-acetate fraction demonstrated better antioxidant capacity compared with vitamin C and trolox. In the compounds, the higher the number of hydroxyls, the greater the antioxidant activity. In addition, stereochemistry influenced antioxidant activity, i.e., compounds with 2R,3R showed greater activity than those with 2R,3S.

Deorum cum mortalibus immediate habita commercia ex Homero illustrata

Arkit: 1 arkintunnukseton lehti, D3 D4 E3.

Validation of an analytical methodology for the quantitative analysis of petroleum hydrocarbons in marine sediment samples

This work describes a validation of an analytical procedure for the analysis of petroleum hydrocarbons in marine sediment samples. The proposed protocol is able to measure n-alkanes and polycyclic aromatic hydrocarbons (PAH) in samples at concentrations as low as 30 ng/g, with a precision better than 15% for most of analytes. The extraction efficiency of fortified sediments varied from 65.1 to 105.6% and 59.7 to 97.8%, for n-alkanes and PAH in the ranges: C16 - C32 and fluoranthene - benzo(a)pyrene, respectively. The analytical protocol was applied to determine petroleum hydrocarbons in sediments collected from a marine coastal zone.

Deorum cum mortalibus immediate habita commercia ex Homero illustrata

Arkit: 1 arkintunnukseton lehti, C-D2.

Argumentum pro existentia Dei ex consensu gentium desumtum

Arkit: 1 arkintunnukseton lehti, A-B4 C3.