5-Nitro-2-pyridone can be selectively N-phenacylated, and the resulting phenacylpyridones I undergo cyclization to 6-nitrooxazolo[3,2-a]pyridinium salts II. These salts II readily react with ammonia and aliphatic amines leading to the products of pyridine ring opening previously unknown 1-amino-2-nitro-4-(oxazole-2-yl)butadienes-1,3. Reaction of salts II with water lead to hydrolytic cleavage o...

TYPES OF MELTS From the practical viewpoint, melts may be classified according to melting points which may limit the available techniques. The lowest melting, with working temperatures up to 250°, are typified by the LiNO3—NaNO3— KNO3 eutectic, NaNO3—KNO3 eutectic, LiClO4, and ammonium formate. With these solvents it is possible to use the dropping mercury electrode, or hanging mercury drop ele...

wvhich aire occupied by illustrations, hut the author has Nvritten succinctly without alnyloss of clarity, ani(d he can coinveymnuch valuable information in very little space. H-lis illustrations halve been chosen wisely, and their quality is of a remarkably high standard. There is no notable omission, withi the single exception, perhaps, of an account of the important changes in the only pa-t ...

Calcium is the most abundant mineral in the body. Bones and teeth contain approx. 99% of calcium. Calcium exists in both plant and animal foods. The best source of calcium is milk. Indian Council of Medical Research (ICMR) recommends 600-800 mg/day of calcium which increases to 1200 mg/day in pregnant and lactating mothers. Inadequate calcium intake for longer duration is responsible for osteop...

Ionic liquid azides from azidoethyl, alkyl, and alkenyl substituted derivatives of 1,2,4- and 1,2,3-amino-triazoles were prepared and examined for the first time to investigate their structural and physical properties. All reported salts possess melting points below 100 degrees C. The unique character of these newly discovered ionic liquid azides is based upon the fact that these molecules are ...

Abstract: Energetic salts as a unique class of energetic materials have recently been investigated widely, since they possess advantages over their atomically similar nonionic analogues – they tend to exhibit lower vapor pressures, higher densities and better thermal stabilities. Furthermore, these salts are readily improved upon by the appropriate combination of different cations and anions. O...

Even so, extensive research has been carried out on potential eco-toxic effects of particulate and extensively degraded oxo-biodegradable plastics when mixed with soil. Tests included seed germination and plant growth rates, compared with the same soil without degraded plastics [3,4], the effects on macro-organisms (worms, daphnia, etc.) in the soil [4] and on the accumulation of transition met...

15.2 Nomenclature Comments .......................................... 403 15.2.1 Aphanothece halophytica ............................................. 403 15.2.2 Dactylococcopsis salina ............................................... 403 15.2.3 Halospirulina tapeticola .............................................. 403 15.2.4 Microcoleus chthonoplastes ......................................... ...

Cereal Chem. 90(3):204–210 A new class of zein additives was investigated, thiocyanate salts. Ammonium, potassium, guanidine (GTC), and magnesium thiocyanate salts were added to solutions of zein in with various amounts of tri(ethylene glycol) (TEG), cast as films, and then tested to determine the impact that each salt had on properties. The presence of these salts affected solution rheology an...