No abstract

Quantitative measures of salt-bridge-type interactions in a highly exposed aqueous environment have been obtained by modifying the well-studied cyclophane platform 1 to include carboxylates in close proximity to bound, cationic guests, producing hosts 2 and 3. Many guests show significantly enhanced binding to 2 and 3, but cations of the RNMe3 + type show little or no enhancement. We propose that the latter observations result from the fact that RNMe3 + compounds have very diffuse positive charges. Guests that show enhanced binding have focused regions of large, positive electrostatic potential. The highly charged 3 is able to bind very polar, very well-solvated guests, including a series of arginine-based dipeptides. Neutral, water-soluble host 4 was prepared and found to show a decreased affinity for cationic guests. We propose a novel induced dipole mechanism to rationalize these results.

Despite a growing number of programs operating in the United States under the guise of “wilderness therapy,” a consistent and accepted definition is lacking. Rehabilitative, outdoor-based approaches, such as “challenge courses,” “adventure-based therapy,” or “wilderness experience programs,” are often used interchangeably to describe “wilderness therapy.” This paper attempts to shed light on this issue by presenting an integrated and consistent definition of wilderness therapy to guide program design and future research efforts. Three trends in the industry are also explored which support the notion that wilderness therapy programs are searching for recognition by state agencies, national accreditation agencies, insurance companies and mental health professionals. These trends support the idea that consistent wilderness therapy practices may be emerging which support the use of a consistent definition.

In the present study, a new diacetylene compound (PDATAZ), which readily forms a complementary hydrogen bonding self-assembly at the air−water interface or in the solid state with barbituric acid (BA) or cyanuric acid (CA), was designed and synthesized. The photopolymerization studies of PDATAZ and its assembly with BA or CA have revealed some important insights on the chromatic properties of polydiacetylenes. It was found that the chromatic property of polydiacetylenes is determined by whether the polymer chain is capable of adopting a linear chainlike shape. With the continuous increase of the length of the polymer chain, the original linear polyenyne backbone starts to “self-fold” to a “zigzag” structure due to the free rotation of single bonds within the polymer chain. The efficient π-electron delocalization along the polyenyne backbone is interrupted by this process, leading to a chromatic change from the blue to red form of polydiacetylenes. If there are strong intermolecular interactions existing between the polar groups of the side chains, such as the complementary hydrogen bonding network between the triaminotriazine (TAZ) moiety of the diacetylene amphiphile and its complementary components, the movement of the side chains is restricted and the folding process of the polymer backbone is inhibited. The polymer backbone is able to maintain its extended chainlike conformation, leading to only the blue form absorption band.

Few studies in the branding literature have approached brand equity from the sport perspective, and even fewer studies focus on the construct from the consumer viewpoint. The purpose of the current research was to empirically test the spectator-based brand equity (SBBE) model. Using a sample from professional basketball consumers, the results of the study show that the 49-item, 13-construct model has a reasonable fit to the data. The study extends the understanding of sport brand equity from the consumer perspective by presenting empirical support for the model. Several managerial implications are offered as a result of the findings.