Search results for "OMAS"
showing 10 items of 1725 documents
Modeling biomass char gasification kinetics for improving prediction of carbon conversion in a fluidized bed gasifier
2014
Gasification of biomass in a fluidized bed (FB) was modeled based on kinetic data obtained from previously conducted thermo- gravimetic analysis. The thermogravimetric analysis experiments were designed to closely resemble conditions in a real FB gasifier by using high sample heating rates, in situ devolatilization and gas atmospheres of H 2 O / H 2 and CO 2 / CO mixtures. Several char kinetic models were evaluated based on their ability to predict char conversion based on the thermogravimetric data. A modified version of the random pore model was shown to provide good fitting of the char reactivity and suitability for use in a reactor model. An updated FB reactor model which incorporates t…
3-5 gadus vecu bērnu vecāku priekštati par māsas lomu viņu bērnu aprūpē
2017
Bakalaura darba tēma ir 3-5 gadus vecu bērnu vecāku priekšstati par māsu lomu viņu bērnu aprūpē. Šīs tēmas aktualitāti nosaka tas, ka pēdējo 5 gadu laikā šāda veida pētījums nav veikts, kā arī tas, ka priekšstati par medicīnisko aprūpi, māsu lomām un to veiktajām darbībām katram no 3-5 gadus vecu bērnu vecākiem var būt dažādi. Darba mērķis ir noskaidrot, kādi ir 3-5 gadus vecu bērnu vecāku priekšstati par māsu lomu viņu bērnu aprūpē. Pētniecības uzdevumi ir- teorētiskās literatūras analīze par 3-5 gadus vecu bērnu aprūpi un P. Benneres māszinību teorijas analīze; pētījuma instrumenta izstrāde; respondentu izlase un pētījuma organizēšana; pētījuma veikšana un analīze, secinājumu izdarīšana. …
Advanced Biorefinery Concepts Integrated to Chemical Pulping
2017
Simultaneous production of furfural and levulinic acid from pine sawdust via acid-catalysed mechanical depolymerization and microwave irradiation
2019
Abstract In this work pine sawdust was converted into levulinic acid (LA) and furfural. Sawdust was first pre-treated with sulfuric acid-catalysed mechanical depolymerization. The conversion reactions were then performed with microwave heating at 180 °C. To enhance the furfural yield and the efficient separation of furfural and LA, a biphasic water-toluene reaction system was used. The effect of an additional catalyst, AlCl3, on the yield of LA and furfural was also studied. According to the results the pre-treatment method enhanced the yields of LA. In addition, due to the microwave heating the reaction times were short. Additional AlCl3 catalyst enhanced the LA yield, however excellent fu…
Świat wartości w śląskich nazwach geograficznych
2015
The objective of the article is an axiological analysis of the Silesian geographical names and the justification of its usefulness in school didactics. Educating pupils by means of proper names integrates linguistic, cultural, historical and political contents. Discussions on names and their justification teach tolerance and patriotism, highlight fundamental values such as family, work, homeland and religion, and emphasize traditions and attachment to one’s “little homeland”. Onomastic aspects can be included in the teaching of the Polish language as well as other subjects, discussed in special interest groups or facultative classes, and used in field games and in mini-biographies of one’s …
Data from: Grazing decreases N partitioning among coexisting plant species
2018
1. Herbivores play a key role in shaping ecosystem structure and functions by influencing plant and microbial community composition and nutrient cycling. 2. This study investigated the long-term effects of herbivores on plant resource acquisition. We explored differences in the natural δ15N signatures in plant, microbial and soil N pools, and examined mycorrhizal colonization in two tundra sites that have been either lightly or heavily grazed by reindeer for more than 50 years. The study examined changes in nutrient acquisition in five common tundra plants with contrasting traits and mycorrhiza status; the mycorrhizal dwarf shrubs, Betula nana, Vaccinium myrtillus and Empetrum hermaphroditu…
The affinities of monoclonal antibodies against core antigen of hepatitis B virus
1994
Four monoclonal antibodies generated against the recombinant core antigen of hepatitis B virus are investigated for antigen binding. All exhibit a similar affinity to polystyrene-sorbed antigen but only one of them interacts with native form of HBcAg (an assembled particle) in solution. The presence of 0.1% sodium dodecylsulphate is required for the binding of other three antibodies. The phenomenon can be interpreted as inaccessibility of the corresponding epitopes unless the multimeric antigen structure is disrupted. The core antigen coated on polystyrene is considered as a similar exposed structure.
Generation of anti-azoxystrobin monoclonal antibodies from regioisomeric haptens functionalized at selected sites and development of indirect competi…
2012
Azoxystrobin is a modern strobilurin fungicide used around the world to combat prime diseases affecting highly valuable crops. Accordingly, residues of this chemical are frequently found in food, even though mostly under maximum tolerated levels. We herein describe the development of an indirect competitive immunoassay for the determination of azoxystrobin residues. A panel of monoclonal antibodies displaying subnanomolar affinity to azoxystrobin was generated using, as immunizing haptens in mice, four functionalized derivatives carrying the same spacer arm located at different rationally chosen positions. This collection of antibodies was thoroughly characterized with homologous and hetero…
Behandlung der ausgeprägten Pubertätsgynäkomastie mit Tamoxifen
1987
Based on the good results of another author 10 boys with marked pubertal gynecomastia were treated with the antioestrogen Tamoxifen (Nolvadex) at a dose of 20-40 mg/d orally for 2-12 months. In most cases the gynecomastia decreased totally, only two patients experienced palpable subareolar glandular tissue at the end of therapy. Side effects were not noted. During therapy levels of estradiol and testosteron increased, with a more pronounced elevation of estradiol. Basal values of LH and FSH remained nearly unchanged, but LH showed an increased response to LH-RH, which could be explained by the antioestrogenic effect of Tamoxifen at the hypothalamic level. The reduction of breast size in spi…