Article history: Iron sulfide (FeS) was invest Received 13 July 2007 Received in revised form 8 May 2008 Accepted 9 May 2008 Available online 27 May 2008 Editor: R.W. Carlson

The algae-induced odorous black water agglomerate (OBWA) is a phenomenon in which water turns black and emits odorous gas. It is an ecological and environmental problem that has occurred several times in Taihu, a large eutrophic shallow lake in China. In this study, the collected eutrophic water with different algae densities was used to simulate OBWA. The results revealed that the massive accu...

can readily determine Fe(II), Mn (II), S(-11) and dissolved 02. Procedures for collecting and handling samples are described and the results from different studies are systematically discussed and evaluated. soluble, colloidal and particulate species have led to the characterization of the time dependent formation of colloidal, complexed and solid phase forms of FeS in natural waters, and to an...

The presence of a general global motion processing deficit in amblyopia is now well established, although its severity may depend on image speed and amblyopia type, but its underlying cause(s) is still largely indeterminate. To address this issue and to characterize further the nature of the global motion perception deficit in human amblyopia, the effects of varying spatial offset (jump size-Δs...

Recipient strains of Streptococcus faecalis produce a trypsin sensitive, heat resistant, nuclease resistant factor, designated clumping-inducing agent (CIA) which causes strains carrying certain conjugative plasmids to aggregate. RNA and protein synthesis but not DNA synthesis are required for aggregation to occur. Recipient filtrates that contain CIA activity also induce donors to mate at high...

We compared and analyzed the expression of the BPI gene of Sutai piglets ranging from newborn to post-weaning days 8, 18, 30, and 35 by the real-time PCR method, in order to determine if it is involved in protection against disease caused by ETEC F18. There was a significant difference between 18 and 35-day expression in the jejunum. There were also significant differences between 35-day expres...

Study on phosphorene nanoribbon was mostly focused on zigzag and armchair structures and no ferromagnetic ground state was observed in these systems. Here, we investigated the magnetic property of tilted black phosphorene nanoribbons (TPNRs) affected by an external electric field. We also studied the edge passivation effect on the magnetism and thermal stability of the nanoribbons. The pure TPN...

We have discovered lines of highly ionized fluorine (F  and F ) in the far-UV spectra of extremely hot (Teff=85 000–150 000 K) post-AGB stars. Our sample comprises H-rich central stars of planetary nebulae as well as H-deficient PG1159 stars. We performed non-LTE calculations and find strong F overabundances (up to 10−4 by mass, i.e., 250 times solar) in a number of PG1159 stars, while F is ...

INTERSTELLAR MEDIUM AND PRESOLAR FeS GRAINS. L.P. Keller, M. J. Loeffler, R. Christoffersen, C. Dukes, Z. Rahman and R. Baragiola. ARES, Robert M. Walker Laboratories for Space Science, Mail Code KR, NASA Johnson Space Center, Houston, TX 77058, Astrochemistry Laboratory, NASA Goddard Space Flight Center, Mail Code 691, Greenbelt, MD 20771, Jacobs ESCG, Houston, TX 77058, Univ. of Virginia, Lab...