Category: Chemistry

Chitosan composite films: Thermal, structural, mechanical and antifungal properties Based on colony spreading, chitosan from shrimp waste in agar media inhibited the growth of Aspergillus niger by 47.26%; there were not differences (P > 0.05) with respect to commercial chitosan (Fluka, BioChemika) (56.16%). All chitosan films showed similar glass...

Reaction Kinetics of Catechol (1,2-Benzenediol) and Guaiacol (2-Methoxyphenol) with Ozone The kinetic reactions of 1,2-benzenediol (catechol) and 2-methoxyphenol (guaiacol) with ozone were studied in a simulation chamber (8 m3) under dark conditions. The rate coefficients were measured at 294 ± 2 K, atmospheric pressure and dry conditions (relative humidity,...

On the Structure of a Catalyst Surface A method is described which makes it possible to calculate rigorously the distribution of the adsorption energies of the sites of a catalyst surface when the adsorption isotherms are known, if the adsorption is localized and there are no interactions. This method...

Structure and expression of fatty acid desaturases Fatty acid desaturases are enzymes that introduce double bonds into fatty acyl chains. They are present in all groups of organisms, i.e., bacteria, fungi, plants and animals, and play a key role in the maintenance of the proper structure and functioning of...

Ischemic stroke is characterised by ischemia-reperfusion damage, which happens when blood flow is restored after a period of ischemia. Thrombolysis with thrombolytic reagents such tissue plasminogen activator (tPA) or mechanical removal can be used to restore blood flow. Ischemia causes inflammation by causing the production of Nf-kb, adhesion molecules,...

Nickel, cobalt, iron, silicon, aluminium, and chromium are among the metal components found in laterite ore, which is one of the mineral resources. It’s found all over the equatorial region and is mostly used as a nickel supply. However, laterite with a high nickel content is the only laterite...

The goal of this book on qualitative inorganic analysis is to give students the tools they need to solve an unknown inorganic sample confidently in the time allotted for a practical exam. It emphasises learning the fundamentals of classical chemistry, including the detection of cations and anions as well...

The design of a mould cover lifting mechanism for a moving fume hood is the subject of this book. The study focuses on a sector that is at the forefront of the alloying business, delivering total alloying solutions to the Iron, Steel, Aluminum, Welding, and other non-ferrous sectors. Author(s)...

The subject of functions with non-decreasing increments has gained prominence in many branches of mathematics in recent decades, and due to its relevance, it has attracted the attention of many mathematicians. We’d like to figure out what the relationship(s) are between functions with non-decreasing increments and the arithmetic integral...

For thermal and physico-chemical processes, the clarification of Bombax brevicuspe wood was analysed. The results obtained were as follows: afterglow time 253.67 sec, flame length 113.33 sec, flame propagation rate 20.3×10-2cm.s-1, ignition time 2.33 sec, thermal conductivity 51.34x102Umoh / cm, electrical conductivity 5.3×10-3Sm-1, ash content 3.4 percent, moisture content...