Search results for "compost"

Synthesis of Multisubstituted 1,4-Dihydrobenzoxazin-2-ones through a One-Pot Nucleophilic N-Alkylation/C-Alkylation of Cyclic α-Imino Esters

2017

A nucleophilic N-alkylation of 2-oxobenzoxazine-2-carboxylates with organozinc reagents with good selectivities and in moderate to good yields is described. Moreover, the synthesis of multisubstituted 1,4-dihydrobenzoxazine-2-ones bearing a tetrasubstituted carbon atom via a one-pot N-alkylation/C-alkylation reactions is reported.

Influenza di lieviti diversi sulla composizione e sul profilo sensoriale di vini Catarratto

2013

Un afecto a la apostolica iglesia de señor Santiago, y zeloso de sus grandes prerrogativas, y lustre. Contra un papel anonimo, irreverente y opuesto…

1731

Caplletra ornada Sign.: [A]2, B-Mmm2 Port. orlada Text amb postil·les marginals Reclams

Un afecto a la apostolica iglesia de señor Santiago, y zeloso de sus grandes prerrogativas, y lustre. Contra un papel anonimo, irreverente y opuesto …

Caplletra ornada Sign.: [A]2, B-Mmm2 Port. orlada Text amb postil·les marginals Reclams

Enantioselective Synthesis of Functionalized Diazaspirocycles from 4‐Benzylideneisoxazol‐5(4H)‐one Derivatives and Isocyanoacetate Esters

2020

Enantioenriched spirocyclic compounds bearing three contiguous stereocenters and high functionalization were obtained through a formal [3+2] cycloaddition reaction catalyzed by a cooperative system. The spiro compounds were synthesized from 4-arylideneisoxazol-5-ones and isocyanoacetate esters using a bifunctional squaramide/Brønsted base organocatalyst derived from a Cinchona alkaloid and silver oxide as Lewis acid. This method afforded two out of the four possible diastereomers with good yields and high enantiomeric excess for both diastereomers.

Influenza della natura dei nutrienti azotati sull’attività di due ceppi di lievito nella vinificazione di uve bianche prodotte in Sicilia

2008

Evaluation of sewage sludge-based compost by FT-IR spectroscopy

2006

The aerobic batch composting fermentations of sewage sludge with wood chips and maturity compost as co-composting additives were carried out in an open type lab-scale reactor. Fourier transform infrared spectroscopy (FT-IR) spectroscopy was used to monitor the composting process, evaluate the degradation rate and thus determine the maturity. Although the composition of the input mixture strongly affects the shape of the infrared (IR) spectra, typical bands of components can be selected and used to follow the composting process. The appearance, shape and intensity of the nitrate band at 1384 cm 1 was well pronounced and evident for a sewage sludgebased compost maturity. An increase of the pe…

The impact of organic amendments on soil hydrology, structure and microbial respiration in semiarid lands

2016

Abstract Few studies have considered the effect of organic amendments on soil microbial activity and its contributions to hydraulic conductivity under field conditions in semiarid region soils with different textures and degrees of aggregate stability. This study was performed to investigate the relationship between selected soil properties and hydraulic conductivity in response to different types and application rates of organic amendments. For this purpose, urban municipal solid waste (MSW) compost and alfalfa residue (AR) were applied at different rates of 0 (control), 10 Mg ha− 1 and 30 Mg ha− 1 to clay loam and loamy sand soils under field conditions. Results show that after two years,…

Indagine preliminare sulla produzione e composizione di succo fermentato di Fico d'India (Opuntia ficus-indica)

2011

Nitroenynes as Electrophiles in Organocatalysis and their Application in the Synthesis of Chiral Heterocycles

2021

Nitroenynes are an interesting electrophile in asymmetric organocatalysis, due to the versatility of the functional groups present in its structure. This review covers the organocatalytic examples using this electrophile and its application for the synthesis of chiral heterocycles.