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Characterization of Dinophysis acuminata from the Yellow Sea, China, and its response to different temperatures and Mesodinium prey

Gao H., An X., Liu L., Zhang K., Zheng D., Tong M.

Oceanological and Hydrobiological Studies

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2017

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Vol. 46, No. 4

439--450

EN

Dinophysis species are distributed worldwide and cause diarrheic shellfish poisoning (DSP). This paper documents the first successful culture of a Dinophysis (DAYS01) strain taken off Xiaoping Island, the Yellow Sea, China. The strain was identified as Dinophysis acuminata Claparède & Lachmann by morphological and phylogenetic analysis. The effects of temperature and different Mesodinium prey on the physiological and toxigenic characteristics of D. acuminata DAYS01 were also investigated. The results showed that the toxin concentration (toxin amount per ml of culture) increased with an increase in cell densities. Okadaic acid (OA), dinophysistoxin 1 (DTX1) and pectenotoxin 2 (PTX2) were the major toxin components of DAYS01, with the highest recorded toxin content of 5.66, 0.56 and 192.87 ng ml-1 culture medium, respectively. The prey type significantly influenced the growth yield in Dinophysis cultures. There was an effect of prey on the total toxin content, suggesting that the origin or strain of ciliate directly impacted the D. acuminata blooms and the overall toxin concentration in the system.

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Zastosowanie pól elektromagnetycznych w leczeniu wybranych chorób układu ruchu

Szymańska K.

Inżynier i Fizyk Medyczny

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2017

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Vol. 6, nr 6

381--384

PL

Organizmy żywe ewoluowały w polu geomagnetycznym, dlatego większość jest czuła na pola elektromagnetyczne. Efekt oddziaływania pola elektromagnetycznego zależy zarówno od właściwości komórek wystawionych na ekspozycję, jak i parametrów użytego pola. Prace eksperymentalne i kliniczne wykazują wiele korzystnych efektów działania pól elektromagnetycznych. Artykuł ma charakter teoretyczny, przeglądowy, oparty jest na przeglądzie literatury oraz doświadczeniach własnych autora. Celem artykułu jest przedstawienie korzystnego wpływu pola elektromagnetycznego na trzy wybrane schorzenia układu ruchu. Zaprezentowano wybrane metody leczenia polem elektromagnetycznym oraz korzystny wpływ wykorzystania tych metod na układ kostny.

EN

Living organisms evolved in the geomagnetic field, thus the majority of them are sensitive to electromagnetic fields. The influence of the electromagnetic field on living organisms depends on the properties of the cells exposed to it and the parameters of the field. Experimental and clinical studies show many beneficial effects of electromagnetic fields. This article is mainly theoretical, reviewing, based on a review of literature and the author’s own experience. The main goal behind this dissertation is to present the beneficial influence of the electromagnetic field on the three selected motion system’s disorders. Methods of electromagnetic field’s treatment and the beneficial effects on the skeletal system were described in the following article.

3

Parametric Sensitivity Analysis of Factors Affecting Sound Transmission Loss of Multi-Layered Building Elements Using Taguchi Method

Garg N., Kumar A., Maji S.

Archives of Acoustics

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2014

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Vol. 39, No. 2

165--176

EN

The paper presents application of Taguchi method in optimizing the sound transmission loss through sandwich gypsum constructions and those comprising of masonry concrete blocks and gypsum boards in order to investigate the relative influence of the various parameters affecting the sound transmission loss. The application of Taguchi method for optimizing sound transmission loss has been rarely reported. The present work uses the results analytically predicted on “Insul” software for various sandwich material configurations as desired by each experimental run in an L8 orthogonal array. The relative importance of the parameters on single-number rating, Rw (C, Ctr) is evaluated in terms of percentage contribu- tion using Analysis of Variance (ANOVA). The ANOVA method reveals that type of studs, steel stud frame and number of gypsum layers attached are the key factors controlling the sound transmission loss characteristics of sandwich multi-layered constructions.