A pig slurry treatment strategy must include processes with the aim of reducing volatile organic compound emissions, controlling odours, mineralising nutrients, improving its fertilising proprieties, and recovering energy, when it is possible. In this sense, anaerobic digestion fulfils all this requirements. However, in areas with high animal farming density and a structural nutrient surplus, i...

Based on ursolic acid, 3 compounds with isothiocyanate groups located at different distances from C-17 of the triterpenoid core have been synthesized through ursane-derived primary amines. To obtain terpene hybrids thioureas and N,S-containing heterocycles, series amines ammonia were reacted novel isothiocyanates. In reactions propargylamine, 4,5-dihydrothiazol-2-yl-amine selectively obtained i...

Ammonia is a low-cost and potentially valuable building block for almost every nitrogen-containing compound required by industry. There is an obvious interest in taking advantage of this chemical as feedstock in catalytic organic transformations to produce higher value products, issue that has began to be explored with some degree of success. However, most of late transition metal catalyzed rea...

The bacterial strain RB1 has been isolated by enrichment cultivation with 2,4-dinitrophenol as the sole nitrogen, carbon, and energy source and characterized, on the basis of 16S rRNA gene sequence comparison, as a Rhodococcus species closely related to Rhodococcus opacus. Rhodococcus sp. strain RB1 degrades 2,4-dinitrophenol, releasing the two nitro groups from the compound as nitrite. The rel...

backgrounds and aims: ammonia removal from air to prevent severe damage to the environment and living organisms is very important. biofiltration is an efficient, easy, cost-effective, and environmentally friendly process for degradation of ammonia from waste air. the aim of this study is to investigate the efficiency of biological filtration using a compost and scallop bed for ammonia removal. ...

Ta8(μ3-O)2(μ-O)8(μ-OEt)6(OEt)14 (1) was obtained by the controlled hydrolysis of tantalum ethoxide Ta(OEt)5 in the presence of ammonia. Compound 1 is considered as the intermediate building block in the sol-gel polymerization of Ta(OEt)5. Further hydrolysis of compound 1 yielded nanoparticles of Ta2O5, which were characterized by various techniques such as TGA-DTA-DSC, UV-vis DRS, XRD, SEM, TEM...

Methionine gamma-lyase, the enzyme which catalyzes the single-step conversion of methionine to alpha-ketobutyrate, ammonia, and methanethiol, is highly active in many anaerobic pathogenic microorganisms but has no counterpart in mammals. This study tested the hypothesis that this pathogen-specific enzyme can be exploited as a drug target by prodrugs that are exclusively activated by it. Trifluo...

Oligonucleotides containing 7-bromo-7-deaza-2,8-diaza-2 0-deoxyadenosine (3) and 5-amino-3-bromo-4-carbamoyl-1-(2 0deoxy-b-D-erythro-pentofuranosyl)pyrazole (4) were synthesized. Compound 3 was prepared from 7-bromo-8-aza-7-deaza-2 0-deoxyadenosine (5) via the 1,N-etheno derivative 6 and was converted into the phosphoramidite 11. The 7-bromo substituent of 3 increases oligonucleotide duplex sta...

In connection with investigations under way in this laboratory concerning the metabolism of compounds containing methyl groups, it was desired to prepare methionine in which the methyl group was labeled with C!14. Methionine labeled with deuterium in the methyl group has been used by du Vigneaud and coworkers (1,2) in studies of transmethylation. The extremely sensitive methods available for th...