Rossiada : poėma v XII-ti [i.e. dvi͡enadt͡sati] pi͡esni͡akh : polnyĭ tekst poėmy : obʺi͡asnitelʹnyi͡a statʹi /

Mode of access: Internet.

Dějiny hry šachové v Čechách od dob nejstarších až po náš věk; studie kulturně-historicka.

Mode of access: Internet.

Kratkoe nachertanīe geografīi dli︠a︡ nachinai︠u︡shikh obuchatʹsi︠a︡ seĭ nauki︠e︡, s prīobshchennīem kratkago opisanīi︠a︡ Rossīi po nyni︠e︡shnemu ei︠a︡ razdi︠e︡lenīi︠u︡.

Mode of access: Internet.

Pöytäkirjat pidetyt siinä Suomen neljän säädyn Waliokunnassa, joka Keisarillisen Majesteetin armollisen ilmoitus-säännön mukaan maaliskuun 29 (huhtikuun 10) päiwältä 1861 yhtyi Helsingissä tammikuun 20-maaliskuun 6 päiwinä 1862.

Mode of access: Internet.

Eu sou o pão da vida! Uma controvérsia em Jo 6,22-59

O cristianismo, ao se estabelecer como uma religião em torno da mesa, teve na eucaristia uma refeição digna, como um símbolo e um posicionamento diante da realidade. Abordar o sentido do alimento na perícope de Jo 6,22-59 se constitui num marco para o cristianismo que permite ver como esse tema tão ligado às questões do cotidiano, lhe agregou símbolos, imagens e conceitos que ressignificam o alimento.

Studio sedimentologico e micropaleontologico di una carota prelevata nel Delta del Po (Olocene della Pianura Padana)

L'integrazione di dati micropaleontologici a dati sedimentologici ha permesso la ricostruzione paleoambientale di una porzione di carota prelevata nel Delta del Po. Sono state riconosciute 5 associazioni di facies riconducibili ad altrettanti ambienti deposizionali: retrobarriera, barriera trasgressiva, piattaforma, transizione fra piattaforma e prodelta e prodelta. Lo studio delle associazioni a foraminiferi bentonici ha consentito la caratterizzazione micropaleontologica delle facies riconosciute. E' stato cosi possibile definire la superficie di massima ingressione marina (MFS) al tetto della associazione di facies di piattaforma al passaggio ai depositi di transizione al prodelta.

Th-234 and Po-210 as POC flux proxies during the ARK-XXVII/3 expedition (August-October 2012)

The Arctic sea-ice extent reached a record minimum in September 2012. Sea-ice decline increases the absorption of solar energy in the Arctic Ocean, affecting primary production and the plankton community. How this will modulate the sinking of particulate organic carbon (POC) from the ocean surface remains a key question. We use the 234Th/238U and 210Po/210Pb radionuclide pairs to estimate the magnitude of the POC export fluxes in the upper ocean of the central Arctic in summer 2012, covering time scales from weeks to months. The 234Th/238U proxy reveals that POC fluxes at the base of the euphotic zone were very low (2 ± 2 mmol C/m**2/d) in late summer. Relationships obtained between the 234Th export fluxes and the phytoplankton community suggest that prasinophytes contributed significantly to the downward fluxes, likely via incorporation into sea-ice algal aggregates and zooplankton-derived material. The magnitude of the depletion of 210Po in the upper water column over the entire study area indicates that particle export fluxes were higher before July/August than later in the season. 210Po fluxes and 210Po-derived POC fluxes correlated positively with sea-ice concentration, showing that particle sinking was greater under heavy sea-ice conditions than under partially ice-covered regions. Although the POC fluxes were low, a large fraction of primary production (>30%) was exported at the base of the euphotic zone in most of the study area during summer 2012, indicating a high export efficiency of the biological pump in the central Arctic. This article is protected by copyright. All rights reserved.

Optimaliseren van leren in en rond PO, VO en MBO.

In deze presentatie wordt ingegaan op mogelijkheden het onderwijs voor en het leren van jonge kinderen en leerlingen in het PO, VO en MBO te optimaliseren.

Determination of 210Po content of vietnamese tobacco samples

Smoking is one of the leading causes of preventable death. In recent years, numerous countries have initiated the prohibition of smoking in restaurants, workplaces and public spaces. The Vietnamese government intends to follow the precautions against public smoking as well. Over and above the number of some hazardous chemical components found in tobacco, ²¹⁰Po isotope content could enhance the probability of the development of lung cancer. In this study 14 Vietnamese tobacco products (commercial cigarettes and pipe tobacco) ²¹⁰Po activity concentration were determined using PIPS semiconductor alpha spectrometry. The results showed that the 210Po activity concentration of the investigated samples varied between 7.40 ± 1.09 - 128.64 ± 11.22 mBq g^-1. The average ²¹⁰Po content of commercial cigarettes was 15.5 mBq g^-1, whilst the average of pipe tobacco was 20.4 mBq g^-1. To estimate the risk of inhalation of ²¹⁰Po isotopes originating as a result of smoking, dose estimations were carried out. © Versita Sp. z o.o.