JBCS

In this paper, we explore the hitherto unknown conformational behavior of the title tertiary amide in deuterated chloroform through a combined experimental/theoretical strategy using one- and two-dimensional NMR spectroscopy and quantum chemical calculations.

Phytochemical investigation of O. lutea leaves resulted in the identification of triterpenes, flavonoid, fatty acids, and glyceroglycolipid. The hexane fraction decreases the average survival of ants from sixteen to six days.

Solubilization and complexation of iron from food supplies, and its sorption on polyurethane foam for quantification by digital images analysis.

In this paper the corn straw was used for the production of cellulose triacetate films from mixtures with glycerol (10%, 20% and 30%).

The energy performance of biomass varies according to its chemical and physical properties, and the burning parameters. Such properties can be determined using biomass characterization standards for energy purposes.

Atomic-molecular arrangement of crystalline extrusion of the silicon carbide coating (filler) dispersed in a potassium silicate binder (K₂SiO₃).

Polyurethanes synthesized with polyols derived from castor oil were evaluated for their mechanical and biological properties. The results indicate that the polyurethanes synthesized with polyols derived from castor oil can be used in the design of biomaterials.

TPO-IR method was used for rapid determination of sulfur species in solid minerals. During the TPO process, sulfur species in minerals are oxidized or pyrolyzed to form sulfur dioxide which is detected by infrared detector. The content of sulfur species was quantified by fitting curve information.

The commercial Brazilian roasted and grounded coffees, traditional and extra strong ones, showed interesting relationships between organic and mineral composition, with traditional and extra strong segmentation even considering roasted coffee from different commercial origins.

An overview of intercomponent interactions in [2]rotaxane molecules is presented, exhibiting how these interactions are studied, in solution and solid state. It is demonstrated the relation and importance between interactions and the major movements presented by this class of molecules.

For more than forty years, Ni-YSZ cermet composites have been the main anode applied to SOFCs. In this cermet conventional anode, the chemical reaction occurs on a three-phase boundary (3PB) defined as an interface composed by an oxygen-ion conductor phase YSZ (electrolyte), an electronic conductor phase (Ni metal) and a fuel gas phase.

The fiber membrane CeO₂-ZrO₂-La₂O₃-Al₂O₃ prepared by electrospinning technology is used as a catalyst carrier and loaded with catalytically active particles such as Pt, Rh and Pd, which can effectively purify NO_X, CO and HC in automobile exhaust into CO₂, H₂O and N₂.

Spectrophotometry and potentiometry techniques were used to quantify silver in an ophthalmic solution. The average concentrations of Ag were 1.65 ± 0.03% (w/v) by spectrophotometry and 1.73 ± 0.06% (w/v) by potentiometry.

The experimental proposal focuses on the conversion of electrical energy to chemical energy and vice versa. The experiments for the two simultaneous energy conversions were designed with simple, easily accessible and inexpensive reagents and materials. The electrochemical reactions involved in the two conversions are considered fundamental in the teaching-learning process of the basic concepts of water electrolysis and in the recombination of hydrogen and oxygen gases.

With a strong presence in almost all production chains, the chemical industry is a strategic sector. The systemic analysis of patenting in these industries in Brazil based on the leading companies showed companies protect their technologies with patent applications despite little partnership.