We consider a continuous time portfolio optimization problems on an infinite horizon for factor model, recently treated by Bielecki and Pliska ["Risk-sensitive dynamic asset management", Appl. Math. Optim. , 39 (1990) 337-360], where the mean returns of individual securities or categories are explicitly affected economic factors. The factors assumed to be Gaussian processes. see new features in constructing optimal strategies risk-sensitive criteria horizon, which obtained from solutions...

Nitrous oxide (N2O) is emitted from pig manure composting, and the emission correlates with nitrite (NO2-) accumulation in composting material. In present study, we added nitrite-oxidizing bacteria (NOB)to inhibit NO2- evaluated its effect on N2O a laboratory-scale experiment. Mature compost (MPMC) containing NOB at 10(6) MPN g(-1) WM or cultured MPMC (cul-MPMC) 10(11) was after thermophilic phase of composting. The addition these materials prevented accumulation, promoting oxidation to...

A thermophilic bacterium, strain TAT105, was isolated from compost made of animal wastes. TAT105 had high tolerance to ammonium nitrogen up 1200 mM, and highly assimilated during the growth on swine feces. The classified into Bacillus, close Bacillus pallidus. To evaluate effect adding ammonia (NH3) emission composting process wastes, laboratory scale done. NH3 tended be lower loss smaller in TAT105-added material than control which not added. Thermophilic ammonium-tolerant bacteria...

Bacillus sp. strain TAT105 is a thermophilic, ammonium-tolerant bacterium that grows assimilating ammonium nitrogen and reduces ammonia emission during composting of swine feces. To develop practical use TAT105, dried solid culture (5.3 × 10(9) CFU/g dry matter) was prepared as an additive. It could be stored for one year without significant reduction TAT105. Laboratory-scale feces conducted by mixing the When additive, mixed with equal weight water day before use, added to obtain...

The raw-starch-affinity site of Aspergillus awamori var. kawachi glucoamylase I (GAI), that was proved to be essential for its adsorbability and digestibility on raw starch granules, found located separately from the active in region corresponding glycopeptide (Gp-I) liberated through action subtilisin. Gp-I consists 45 amino acid residues, hydroxy acids being characteristically abundant, 56 mannose residues. sequence determined with an automatic sequencer ATGGTTTTATTTGSGGVTST...

The raw-starch-digesting glucoamylase I (GAI) of Aspergillus awamori var. kawachi contains a glycopeptide (Gp-I) region as the raw-starch-affinity site essential for its raw-starch-adsorption and raw-starch-digestion. Molecular cloning GAI gene analysis nucleotide sequence revealed some replacements, in comparison with niger genes. deduced total ami no acid contained 35 replacements one deletion, mi residues, therefore 615 A. glucoamylases. raw-starch-adsorbable Gp-I was located between...

The nitrogen concentrations of piggery wastewater and its activated sludge treatment effluent were surveyed in nine farms with various facilities. biological oxygen demand suspended solids the sufficiently removed by because their averaged 59 mg·L-1 45 mg·L-1, respectively; however, was not concentration 430 mg·L-1. When higher than general permissible limit under Japanese law, composition tended to be mainly ammonium when pH 8 or higher, a mixture ammonium, nitrite and/or nitrate below 8....

Thermophilic ammonium-tolerant bacterium Bacillus sp. TAT105 grows and reduces ammonia (NH3) emissions by assimilating ammonium nitrogen during composting of swine feces. To evaluate the efficacy a biological additive containing at reducing NH3 emissions, tests manure on pilot scale (1.8 m3) were conducted. In TAT105-added treatment, loss lower than those in control treatment without TAT105. No significant difference was detected losses weight volatile solids between treatments....

The relationship between the activity and community structure of microbes associated with oxidation ammonia in a full-scale rockwool biofilter was examined by kinetic, denaturing gradient gel electrophoresis (DGGE), sequence analyses. packing materials were sampled from two different depths at 3 sites. Estimated K(m) values similar among same sampling sites, while V(max) differed mid-point sample. lower depth this site had highest V(max). A correspondence analysis showed DGGE profile...

To obtain insight into the complex behaviour of denitrifying and total bacterial groups during nitrogen accumulation process in an ammonia-loaded biofiltration system.Denitrifying communities a laboratory-scale rockwool biofilter with intermittent water recirculation were analysed by using denaturing gradient gel electrophoresis targeting nosZ metabarcoding sequencing 16S rRNA gene. Gene abundance was evaluated quantitative PCR. The number increased from 6·59 × 106 to 3·33 108 copies per...

To investigate community shifts of amoA-encoding archaea (AEA) and ammonia-oxidizing bacteria (AOB) in biofilter under nitrogen accumulation process.A laboratory-scale rockwool with an irrigated water circulation system was operated for 436 days ammonia loading rates 49-63 NH(3) g m(-3) day(-1). The AEA AOB communities were investigated by denaturing gradient gel electrophoresis, sequencing real-time PCR analysis based on amoA genes. results indicated that changes abundance compositions...

Aspergillusawamori var.kawachi glucoamylase (GA) existed in three molecular forms varying size, raw starch digestion and hydrolysis curve toward glycogen.

Swine wastewater has a high potential for phosphorous recovery in Japan. The pH of swine increased up to approximately 8.5 with continuous aeration, and large part the soluble PO4-P, Mg Ca was crystallized. A reactor removing recovering from designed dual function i.e., crystallization through separation formed struvite by settling. However, dehydration, composting characterization process first needed before using sediment sludge, including struvite, on farmland, since it will settle along...