The work was undertaken to assess the antigenic affinity of some Neisseria perflava, Klebsiella pneumoniae, Staphylococcus aureus strains serving as active sensitinogen of the human broncho-pulmonary apparatus. With the aid of the complement fixation test, precipitation after Ouchterolony, and immunoelectrophoresis there was established the presence of a series of similar antigenic determinants common for all the three microbes and for determinant responsible for the cross reactions of two microbes only.
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Colloids fractionation and characterization of arsenic (As) and dissolved organic matter (DOM) in surface water around a closed arsenic mine.
J Hazard Mater
January 2025
Research Institute for Environmental Innovation (Binhai, Tianjin), Tianjin 300450, PR China. Electronic address:
The speciation and mobility of arsenic (As) in waters are largely influenced by the colloids; however, the impacts of colloids with different molecular weights (MWs) in water fractions remain largely unknown. Herein, the surface water was fractionated into three colloidal fractions and truly dissolved fraction via cross-flow ultrafiltration. Total As (As(T)) presented mainly as As(V) and existed primarily in the truly dissolved fraction.
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Proc Natl Acad Sci U S A
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