research works proposed that radical scavenging activity of flavonoids is due to ring b, andthe remaining part of the molecule can be disregarded. thus the objective of this work is toobserve whether hydroxytoluenes account the radical scavenging activity of flavonoid and toestablish structural requirements for their activity (as they showed appreciable activity) andelucidate a comprehensive me...

The aim of this study is to evaluate and compare the oral bioavailability nanonized progesterone (nano-PG) micronized (micro-PG) sustained release tablet formulation in healthy pregnant rabbits. High pressure compressed gas technology reduces particle size from 1.72 ± 2.5 μm 800 35 nm (nano-PG). DSC XRD showed that both micro-PG nano-PG were crystalline exist as form I. Higher melting enthalpy ...

Blast-furnace slag is one of the main by-products produced in process blast-furnace ironmaking. Its metallurgical properties have an important impact on smooth operation and long life blast furnaces. In this paper, activity MgO a CaO-SiO2-MgO-Al2O3 quaternary system was measured using reference-slag method at 1773–1873 K. The effects temperature coefficient Mg Sn were discussed. results showed ...

Theoretical calculations have shown that acidic candies may be potentially erosive upon consumption. However, little is known about the protective effect of adding calcium to potentially erosive candies and about the protective effects of saliva that cannot be fully accounted for by theoretical calculations. Therefore, the aims of this study were to (1) determine the erosive potential of acidic...

The enthalpy of hydrolysis of the 3’-bond of several cyclic 3’,5’-nucleotides and of the 2’-bond of several cyclic 2’,3’nucleotides has been measured calorimetrically. In each case, the enthalpy was indicative of a high energy bond, although values for different compounds varied from -7.7 to 14.1 kcal mole-‘. The enthalpy of hydrolysis of the cyclic 3’,5’-nucleotides, but not that of the cyclic...

5.1 Abstract The change in the configurational enthalpy of metallic-glass-forming liquids induced by mechanical deformation and its effect on elastic softening is assessed. The acoustically measured shear modulus is found to decrease with increasing configurational enthalpy by a dependence similar to one obtained by softening via thermal annealing. This establishes that elastic softening is gov...

this paper dealswith thermo-mineral groundwater of themondragone plain (campania, southernitaly) and the possibility to use this low enthalpy geothermal resource. in the nw sector of this plain, at thebottom of mt. pizzuto, near the sea, there are thermo-mineral waters (50 °c) of sodium-chloride type,sulfureous and rich in co2 whose recharge is from the mt. pizzuto groundwater body. in the se s...

6-amino-1,2,4-triazolo[4,3-b][1,2,4,5]tetrazine (attz)is an explosive material, that has been synthesized from the reaction of 3,6-diaminotetrazine , with nitrous acid and then sodium azide. in the simplest terms, an explosive is defined as a substance, which on initiation by friction, impact, shock, spark, flame, heating, or any simple application of an energy pulse, undergoes a rapid chemical...

Ye'elimite occurs in nature and calcium sulfoaluminate cements. The thermodynamic properties of synthetic orthorhombic ye'elimite, Ca4Al6O12SO4, were determined experimentally using low-temperature relaxation calorimetry at higher temperatures differential scanning drop calorimetry. heat capacity, Cp, 480 J/mol/K standard entropy, S°, 487 298 K measured. These values compare well with those cal...