Removal of the Organic Contaminants β-estradiol and Saxitoxins (STX, NEO-STX AND dc-STX) by Nanofiltration: Bench Scale Evaluation
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چکیده
منابع مشابه
Clinical Escherichia coli strains carrying stx genes: stx variants and stx-positive virulence profiles.
Altogether, 173 Shiga toxin-producing Escherichia coli (STEC) serotype O157 (n = 111) and non-O157 (n = 62) isolates from 170 subjects were screened by PCR-restriction fragment length polymorphism for eight different stx genes. The results were compiled according to serotypes, phage types of O157, production of Stx toxin and enterohemolysin, and the presence of eae. The stx genes occurred in 11...
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Phages 933W, BAA2326, 434, and λ are evolutionarily-related temperate lambdoid phages that infect Escherichia coli. Although these are highly-similar phages, BAA2326 and 933W naturally encode Shiga toxin 2 (Stx⁺), but phage 434 and λ do not (Stx(-)). Previous reports suggest that the 933W Stx⁺ prophage forms less stable lysogens in E. coli than does the Stx(-) prophages λ, P22, and 434. The hig...
متن کاملShiga Toxin (Stx) Type 1a Reduces the Oral Toxicity of Stx Type 2a
BACKGROUND Shiga toxin (Stx) is the primary virulence factor of Stx-producing Escherichia coli (STEC). STEC can produce Stx1a and/or Stx2a, which are antigenically distinct. However, Stx2a-producing STEC are associated with more severe disease than strains producing both Stx1a and Stx2a. METHODS AND RESULTS To address the hypothesis that the reason for the association of Stx2a with more sever...
متن کاملStreaming Transformations for XML-STX
STX (Streaming Transformations for XML) ist eine Transformationssprache, die als schnelle und speicherschonende Alternative zu XSLT entworfen wurde. STX weist gewisse syntaktische Ähnlichkeiten zu XSLT auf, arbeitet jedoch auf einem Strom von SAX-Events und transformiert diesen unmittelbar in einen entsprechenden Ergebnis-Strom. STX-Transformationen können auf diese Weise unter anderem als SAX-...
متن کاملEffects of saxitoxin (STX) and veratridine on bacterial Na+ -K+ fluxes: a prokaryote-based STX bioassay.
Saxitoxin (STX) is a potent natural sodium channel blocker and represents a significant health concern worldwide. We describe here the antagonistic effects of STX and veratridine (VTD), an Na+ channel activator, on three gram-negative bacteria and their application to an STX bioassay. STX reduced the total cellular levels of both Na+ and K+, as measured by flame photometry, whereas VTD increase...
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ژورنال
عنوان ژورنال: Procedia Engineering
سال: 2012
ISSN: 1877-7058
DOI: 10.1016/j.proeng.2012.08.361