The present study was intended to investigate the impact of blended and classroom teaching methods on Iranian EFL learners’ writing. To this end, a group of 29 upper intermediate and advanced EFL learners were randomly placed in two groups: an experimental group, namely Blended Learning and a control group, namely Classroom Learning after taking part in a placement test. Participants of the Ble...

The present study was intended to investigate the impact of blended and classroom teaching methods on Iranian EFL learners’ writing. To this end, a group of 29 upper intermediate and advanced EFL learners were randomly placed in two groups: an experimental group, namely Blended Learning and a control group, namely Classroom Learning after taking part in a placement test. Participants of the Ble...

nowadays, utilization of blended fuel in internal combustion engine is one of main topics in vehicle industries. the synergy effect will be highlighted when the potential of each fuel is employed and the engine performance will improve consequently.  in this research, the laminar flame speed of methane (main component of reference fuel for natural gas) and isooctane (main component of reference...

The study investigates the effect of aluminium oxide nanoparticles as an additive to Madhuca Indica (mahua) methyl ester blends on performance, emission analysis of a single-cylinder direct injection diesel engine operated at a constant speed at different operating conditions. The test fuels are indicated as B10A0.2, B10A0.4, B20A0.2, B20A0.4 and diesel respectively. The results indica...

The environmental analysis of amines is important to preserve human health because these compounds often have toxic effects. Gas chromatography (GC) of free amines is generally unsatisfactory owing to the adsorption and decomposition of the solutes on the column. Derivatization of amines is employed to reduce the polarity and to improve the GC properties. Derivatization reactions for the determ...

This account focuses on the application of ω-transaminases, lyases, and oxidases for the preparation of amines considering mainly work from our own lab. Examples are given to access α-chiral primary amines from the corresponding ketones as well as terminal amines from primary alcohols via a two-step biocascade. 2,6-Disubstituted piperidines, as examples for secondary amines, are prepared by bio...

Highly fluorescent and photoconductive nanoribbons assembled from an asymmetric perylene diimide (PDI) were used as a dual-mode sensor for sensitive and selective discrimination of two classes of organic amines in the vapor phase, i.e., alkyl amines and aromatic amines.

Biological amines are nitrogenous compounds that occur naturally in wide variety of food. Histamine, putrescine, cadavarine, tyramine, spermine, spermidine, tryptamine and β-phenylethylamine are the biogenic amines that are normally present in foods. Although the biogenic amines play some important physiological functions but high level of amines can cause toxicological effects. High amount of ...