Growth of the organisms. Nitrobacter was obtained from an Aberdeen garden soil by serial subculture in a medium made up as follows. To 10 1. ofwater were added 30 g. ofKH2P04, 1 g. of CaSO4, 0 5 g. of MgCl2, 0 01 g. of MnCl2, 0-2 ml. of dialysed iron (B.P.). By addition of lOM-NaOH, the pH was adjusted to 7-8, which is the optimum pH for the strain of Nitrobacter used (Lees, 1954). The solution...

To assess links between the diversity of nitrite-oxidizing bacteria (NOB) in agricultural grassland soils and inorganic N fertilizer management, NOB communities in fertilized and unfertilized soils were characterized by analysis of clone libraries and denaturing gradient gel electrophoresis (DGGE) of 16S rRNA gene fragments. Previously uncharacterized Nitrospira-like sequences were isolated fro...

The application of compost bedding system on sheep farm is a technology to minimize the negative impact manure waste toward environment. microorganisms which inhabit bedding, especially nitrifying bacteria are expected have significant role in odor emission reduction become environmental problem around farm. This study aims analyze abundance and diversity obtained from important reducing ammoni...

Dear Editor, Case Report Patient This 60-year-old male had rheumatic mitral valve stenosis treated with open mitral valvotomy in 1982, percutaneous transmitral commissurotomy in 2008 and mitral valve replacement (29 mm EPICTM bioprosthetic mitral valve) plus tricuspid valve ring annuloplasty in 2009. He remained dyspnoeic after surgery. On auscultation, the pulmonary component of the second hea...

Few quantitative studies of the biological oxidation of nitrite by Nitrobacter have been made, although this process is important in nature. Without it, the concentration of nitrite produced by the oxidation of ammonia would soon reach toxic levels in water or in the soil. The influence of temperature and substrate concentration on the rate of this reaction has never been quantitatively studied...

The Hokou gecko (Gekko hokouensis: Gekkonidae, Gekkota, Squamata) has the chromosome number 2n = 38, with no microchromosomes. For molecular cytogenetic characterization of the gekkotan karyotype, we constructed a cytogenetic map for G. hokouensis, which retains the ancestral karyotype of Gekkota, with 86 functional genes, and compared it with cytogenetic maps for four Toxicofera species that h...

The ratios of bicarbonate uptake to substrate oxidation were measured for three genera of nitrifying bacteria. The ratios for the two ammonium oxidizers tested were essentially the same; 0.0863 +/- 0.0055 and 0.0868 +/- 0.0091 mumol of bicarbonate were taken up per umol ammonium oxidized for Nitrosomonas europaea and a Nitrosospira strain, respectively. For Nitrobacter sp., a ratio of 0.0236 +/...

Understanding which factors determine tick-borne disease hazard can contribute to effective control. In Europe, the of pathogens Borrelia burgdorferi s.l. and Anaplasma phagocytophilum is determined by local tick densities (mainly Ixodes ricinus) reservoir competence host species community. Sand lizards (Lacerta agilis) are common hosts for larvae nymphs I. ricinus non-competent reservoirs both...