Abstract The resistance of alkali-activated materials (AAMs) to degradation processes, particularly the decalcification, was studied in this paper. ground granulated blast furnace slag using various activators with same activator dosage 6% Na 2 O by weight (sodium hydroxide, sodium waterglass and carbonate) subjected testing decalcification (immersion 6M NH 4 NO 3 ) for 84 days. reference sampl...

Micro respirometry studies, with the aid of the Cartesian diver (1, ,2), have presented several problems in manipulation. One of these has been the problem of mixing two or more solutions quantitatively in the diver, after the start of an experiment. Methods have been described accomplishing this (3,4). These methods could be mastered only by special training, patience, and skill. A much less d...

I t was observed that the Endo medium, as ordinarily prepared, with a phenolphthalein reaction of + 0.2, gave variable results with the dysentery group of bacilli, the Shiga type of Bacillus dysenterice being either markedly inhibited in its growth or failing to grow at all. This restraining effect was found to be due to the end-reaction, which, after the addition of the sulfite, reached a hydr...

Two simple titrimetric methods have been developed for the determination of hydroxyzine dihydrochloride (HDH) in pure form and in tablets. The principle of the methods are simple acid-base reactions in which the hydrochloride content of the drug was determined by titrating with an aqueous standardized NaOH solution either visually using phenolphthalein as indicator (method A) or potentiometrica...

Thymidylate synthase is an attractive target for antiproliferative drug design because of its key role in the synthesis of DNA. As such, the enzyme has been widely targeted for anticancer applications. In principle, TS should also be a good target for drugs used to fight infectious disease. In practice, TS is highly conserved across species, and it has proven to be difficult to develop inhibito...

Caffeine is one of the most consumed stimulants in the world, and is a frequent ingredient of dietary supplements. The aims of this work were to validate a GC-MS method for the quantitation of caffeine and identification of other substances in supplements, mainly weight loss products, and to estimate the caffeine intake by consumers. Sample preparation included extraction with chloroform:water ...