147 research outputs found
Development and evaluation of an emulsion containing lycopene for combating acceleration of skin aging
Licopeno é um carotenóide com potente atividade antioxidante encontrado em grande quantidade no tomate e usado no combate a diversas doenças como doenças cardiovasculares e diferentes tipos de cânceres, incluindo o câncer de próstata. O objetivo desse trabalho foi desenvolver uma emulsão contendo extrato de licopeno obtido do tomate salada e avaliar a citotoxicidade do extrato, a estabilidade, o comportamento reológico, atividade antioxidante e permeação do fitocosmético. O cosmético foi desenvolvido utilizando fase oleosa contendo derivados de Karité e submetido à avaliação da estabilidade físico-química, espalhabilidade, análise térmica, comportamento reológico, qualidade microbiológica, citotoxicidade, atividade antioxidante e testes de permeação e retenção cutânea. Os resultados demonstraram que o fitocosmético é estável, apresenta comportamento reológico desejável para uma formulação tópica e é um produto promissor para ser utilizado no combate à aceleração do envelhecimento cutâneo.Lycopene, a carotenoid and potent antioxidant is found in large quantities in tomatoes. Lycopene combats diseases, such as cardiovascular disease and different types of cancer, including prostate cancer. However, its topical use in emulsion form for the combat of skin aging is under-explored. The aim of the present study was to develop an emulsion containing lycopene extracted from salad tomatoes and evaluate its cytotoxicity, stability, rheological behavior, antioxidant activity and phytocosmetic permeation. The developed cosmetic comprised an oil phase made up of shea derivatives and was evaluated in terms of its physiochemical stability, spreadability, thermal analysis, rheological behavior, microbiological quality, cytotoxicity, antioxidant activity, cutaneous permeation and retention. The results demonstrate that this phytocosmetic is stable, exhibits satisfactory rheological behavior for a topical formula and is a promising product for combating skin aging
The Recall and New Job Search of Laid-off Workers: A Bivariate Proportional Hazard Model with Unobserved Heterogeneity
The Influence of Temporal Fit/Nonfit on Creativity in the Leader-Subordinate Context: The Moderating Role of Task Enjoyment versus Performance Concern
This study extends regulatory fit theory by exploring boundary conditions
of the temporal fit/nonfit effect on subordinate creativity. We propose
that fit (nonfit) between subordinates regulatory focus and the temporal
distance of a leader-stipulated task enhances subordinate creativity under
task-enjoyment (performance-concern) conditions. Data supported the
nonfit hypothesis among promotion-focused subordinates: Subordinates
who were more promotion-focused showed greater creativity after recalling
a leader-stipulated, temporally near task when they concentrated on doing
well rather than on enjoying the task. Prevention-focused subordinates showed no such patterns for creativity. Implications for managing employee
creativity in the competitive, performance-pressured organizational and
business environment are discussed
Testing a videogame intervention to recalibrate physician heuristics in trauma triage: study protocol for a randomized controlled trial
Transfer of value from fit
People experience regulatory fit when they pursue a goal in a manner that sustains their regulatory orientation (E. T. Higgins, 2000). Five studies tested whether the value experienced from regulatory fit can transfer to a subsequent evaluation of an object. In Studies 1 and 2, participants gave the same coffee mug a higher price if they had chosen it with a strategy that fit their orientation (eager strategy/promotion; vigilant strategy/prevention) than a strategy that did not fit. Studies 3–5 investigated possible mechanisms underlying this effect. Value transfer was independent of positive mood, perceived effectiveness (instrumentality), and perceived efficiency (ease), and occurred for an object that was independent of the fit process itself. The findings supported a value confusion account of transfer. There is no more important variable in motivation and decision making than value. In thinking about value, no concept has been more central than the hedonic principle. People approach pleasure and avoid pain. This hedonic principle underlies a wide variety of motivation and decision-making models, including animal learning models (e.g., Mowrer, 1960; Thorndike, 1935), personality models (e.g., Atkinson, 1964), social psychological models (e.g.
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