Quantitative and qualitative development of natural and agricultural science resources in the agro database (2009-2016)

The types of natural and agricultural science resources contained in the AGRO database have been characterized and their dynamic development in qualitative and quantitative terms in 2009–2016 has been described. In addition, types of database records are presented, with justification for their differentiation by: records containing only a bibliographic description of the article, bibliographic records along with authors’ affiliations, records with, in addition to the aforementioned elements, summaries and attachment bibliographies and records of the highest information value, most frequently searched by database users, in other words records containing full texts of articles. Furthermore, the database recipients and their information and search preferences based on surveys are defined. The use of AGRO in Poland and abroad is considered based on selected statistical data. The AGRO database development plans are discussed depending on the acquisition of funds for its maintenance and quantitative development and the multiplication of records with full texts

Analysis of copper content in the poly(phenylene oxide) production process streams

Przedstawiono wyniki oznaczania zawartości miedzi w strumieniach technologicznych pochodzących z procesu otrzymywania poli(tlenku fenylenu) (PPO) metodą polimeryzacji strąceniowej 2,6-dimetylofenolu z użyciem soli miedzi(II) jako kokatalizatora. Techniką FAAS (płomieniowa absorpcyjna spektrometria atomowa) badano mineralizaty próbek pochodzących z węzła odzysku rozpuszczalników (metanol lub etanol, toluen) i z węzła odzysku składników układu katalitycznego [jony miedzi(II), morfolina]. Zaproponowano procedurę analityczną obejmującą, na etapie przygotowania roztworów do badań, mineralizację próbek za pomocą nowoczesnego systemu do roztwarzania mikrofalowego Ultra WAVE (Milestone). Metoda ta (w połączeniu z techniką FAAS) pozwala na szybkie i sprawne oznaczanie zawartości miedzi w ciekłych próbkach z matrycą organiczną (metanol/etanol – toluen, morfolina) i wodno-organiczną.Results of copper determination in process streams coming from the poly(phenylene oxide) (PPO) production by precipitation polymerization of 2,6-dimethylphenol using the copper(II) salt as a co-catalyst have been presented. A microwave-assisted sample preparation analytical procedure for the determination of copper in stream samples from the organic solvents (methanol or ethanol, toluene) and the catalyst components [copper(II) ions, morpholine] recovery nodes using a modern Milestone Ultra WAVE digestion system combined with the FAAS technique has been proposed. The method is useful for quick and efficient determination of copper in liquid samples with organic (methanol/ethanol – toluene, morpholine) mixtures and aqueous-organic matrix