University of Arkansas

About: University of Arkansas is a education organization based out in Fayetteville, Arkansas, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 17225 authors who have published 33329 publications receiving 941102 citations. The organization is also known as: Arkansas & UA.

The influence of firm behavior on purchase intention: do consumers really care about business ethics?

Abstract: Posits that although behaving “ethically” should be important for its own sake, whether a firm behaves ethically or unethically may also have a significant influence on consumers’ purchase decisions. Examines the issue of unethical corporate behavior from the perspective of consumers. Addresses several questions. First, what are consumers’ expectations regarding the ethicality of corporate behavior? Second, is whether a firm acts ethically or unethically an important consumer concern, and if so, will information regarding a firm’s behavior influence their purchase decision? Demonstrates that consumers say they do care about a firm’s ethics and will adjust their purchase behaviors accordingly.

Photochemical instability of CdSe nanocrystals coated by hydrophilic thiols.

Abstract: The photochemical instability of CdSe nanocrystals coated by hydrophilic thiols was studied nondestructively and systematically in water. The results revealed that the photochemical instability of the nanocrystals actually included three distinguishable processes, namely the photocatalytic oxidation of the thiol ligands on the surface of nanocrystals, the photooxidation of the nanocrystals, and the precipitation of the nanocrystals. At first, the thiol ligands on the surface of a nanocrystal were gradually photocatalytically oxidized using the CdSe nanocrystal core as the photocatalyst. This photocatalytic oxidation process was observed as a zero-order reaction in terms of the concentration of the free thiols in the solution. The photogenerated holes in a nanocrystal were trapped onto the thiol ligands bound on the surface of the nanocrystal, which initiated the photooxidation of the ligands and protected the nanocrystal from any photooxidation. After nearly all of the thiol ligands on the surface of the ...

Alternative Routes toward High Quality CdSe Nanocrystals

Abstract: Different kinds of safe, common, and low-cost compounds were proven to be good solvents/precursors for the synthesis of high quality CdSe nanocrystals. The size, shape, and crystal structure of CdSe nanocrystals synthesized by these alternative routes can be varied in a controllable manner in a very broad size range, from about 1.5 nm to above 25 nm. Without any size sorting, the size distribution of the wurtzite nanocrystals in the size range smaller than about 15 nm can be readily controlled as narrow as with 5−10% relative standard deviation. The highest photoluminescence quantum efficiency of the nanocrystals was up to 20−30%. Cd(Ac)2 and fatty acids were found to be the most versatile cadmium precursor and solvent/ligand, respectively. The synthesis of high quality CdSe nanocrystals in the current systems is not feasible when the system contains any anions from a strong acid, either in the form of a cadmium precursor or as an added cadmium ligand. The experimental results indicate that the synthesis ...

Compositions and sorptive properties of crop residue-derived chars.

Abstract: Chars originating from the burning or pyrolysis of vegetation may significantly sorb neutral organic contaminants (NOCs). To evaluate the relationship between the char composition and NOC sorption,...