Family infection in enterobiasis

Chromium Speciation Using Flow-injection Preconcentration on Xylenol Orange Functionalized Amberlite XAD-16 and Determination in Industrial Water Samples by Flame Atomic Absorption Spectrometry

“…Moreover, analyte loss is minimized, and thus, the preconcentration factor is high. Flow injection-solid phase extraction with FAAS (FI-SPE-FAAS) has been applied for the preconcentration of several other heavy metal ions, such as cadmium, 24 copper, 25 lead, 26 zinc, 27 etc. The aim of the reported work is to use Amberlite XAD-16 chemically modified with xylenol orange chelating resin as an on-line preconcentration method to achieve the speciation of Cr(III) and Cr(VI), and for determination in industrial water samples using FIA interfaced to FAAS.…”

Sythesis of Some New Quinazolin-4-one Derivatives

“…The reaction of anthranil 1 with formamide and/or hydroxyl amine hydrochloride, afforded quinazolin-4-one (2) which are investigated as before (14) , treatment of 3,4 dihydroquinazolin-4-one (2a) with P 2 S 5 in dry toluene gave 2-(1-methylethyl)-3,4-dihydroquinazolin-4-thione (3) which has highly antimicrobial effects. Interaction of thione 3 with hydrazin hydrate and/or 3amino propanol, afforded 2-(1-methylethyl)-4(3-hydrazino and/or hydroxyl propyl-amino) quinazoline (4).Fused azoloazine systems have attracted attention due primarily to the fact that they are widespread among natural biologically active compounds (28) . So, 1,2,4-triazolo [4,3-c] quinazolines 5, 6 have been created via interaction of 4-hydrazino quinazoline derivative 4a with carbon electrophiles namely, Ac 2 O & CS 2 , respectively.…”

“…Many substituted 4(3H)-quinazolines are known to possess diverse biological activities as antimalarials (1) , hyponotics (2) , anticonvulsant (3) , anti-protozoal agents (4) , bacteriostatic and anti-fungal (5) . Also, several styryl heterocycles have been reported to exhibit antitumor activity (6) and anti-HIV (7) , as aurora 2 kinase inhibitor, for treatment of proliferative diseases (8) and as dyes on silk, wool and viscose rayon (10) , also, the wide range of pharmacological properties of quinazoline derivatives such as analgesic and anti-inflammatory (11) , antihistaminic (12) , antihypersive (13) .…”