The cyclization of b-anilino propionic acids in the presence of polyphosphoric acid (PPA) afforded the 2,3-Dihydroquinoline-4-(1H)-ones in good yields. N,N'-bis(2-carboxyethyl)-4-methyl-1,2-diaminobenzene (7) is cyclized under this condition to produce the 1,5-diaza-2,3,6,7-tetrahydro-4-methyl-pheranthrene-4,8-dione(bis-quinolone) (8).

the synthesis and properties of new monoazo dyes derived from the diazonium salts of paminobenzoic acid, 3-trifluoromethyl aniline , 4-trifluoromethyl aniline are considered .theprepared compounds were characterized by uv-visible , ft-ir and h nmr spectroscopictechniques . the effect of varying solvent upon the absorption ability of p-amino benzoic acidcoupled with 4,4 —diethyl aniline , anilin...

This experiment investigated the effect of intraruminal infusion of propionic acid on the net flux of nitrogenous compounds across the mesenteric- (MDV) and portal-(PDV) drained viscera of seven Friesian steers, average BW 127 kg (SEM 4.6), fed a grass-pellet diet. Each received by random allocation 0 (control), .5, or 1.0 mol of propionic acid/d for 7 d. Blood flow in mesenteric and portal vei...

180 words Introduction: 873 words Discussion: 1726 words Abbreviations: AMPA (alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid), CMPDA (a phenyl-1,4-bis-alkylsulfonamide), CMPDB (a phenyl-1,4-bis-carboxythiophene), deact (deactivation), des (desensitization), CTZ (cyclothiazide), CX614 (pyrrolidino-1,3-oxazino benzo1,4-dioxan-10-one), LBC (ligand-binding core), PDB (Protein Data Bank) ...

A protective effect of nicotine against glutamate-induced neurotoxicity has previously been reported in cultured striatal and cortical neurons. The aim of this study was to investigate whether nicotine also inhibits glutamate-evoked arachidonic acid release from cultured striatal neurons. (-)-Nicotine selectively inhibited the release of [3H]-arachidonic acid induced by the joint stimulation of...

The methoxy- and fluoro-derivatives of meta-nitrophenylacetic acid (mNPA) chromophores undergo photodecarboxylation with comparable quantum yields (Φ) to unsubstituted mNPA, but uncage at red-shifted excitation wavelengths. This observation prompted us investigate DPAdeCageOMe (2-[bis(pyridin-2-ylmethyl)amino]-2-(4-methoxy-3-nitrophenyl)acetic acid) DPAdeCageF (2-[bis(pyridin-2-ylmethyl)amino]-...

this experiment was conducted to investigate the effects of using protexin, propionic acid growth promoters, and a blend of them on broilers performance. in a completely randomized design, three hundreds and twenty unsexed 1-d-old chicks were divided into four groups. dietary treatments were consisted of 1) control diet without any supplement, 2) the control diet + 0.01 % protexin, 3) the contr...

BACKGROUND Propionic acid is used primarily as a food preservative with smaller applications as a chemical building block for the production of many products including fabrics, cosmetics, drugs, and plastics. Biological production using propionibacteria would be competitive against chemical production through hydrocarboxylation of ethylene if native producers could be engineered to reach near-t...

Autoradiography of excitatory and inhibitory amino acid binding sites in human dentate nuclei indicated virtually no binding to N-methyl-D-aspartate (NMDA) or gamma-aminobutyric acidB (GABAB) binding sites, and a low density of kainate binding sites. alpha-Amino-3-hydroxy-5-methylisoxazole-4-propionic acid, metabotropic-quisqualate, benzodiazepine, and gamma-aminobutyric acidA (GABAA) binding s...

the aim of this study was to investigate the processing methods of sorghum grain and diet formulation on performance and nutrients digestibility in broilers. three hundred and twenty chicks at eight day of age were allotted into eight groups of four replicate with ten chicks per replicate. this research was conducted as completely randomized design arranged in a 2 × 2 × 2 factorial experiment u...