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Deliza R.,Embrapa Food Technology | Rosenthal A.,Embrapa Food Technology | Hedderley D.,Crop and Food Research | Jaeger S.R.,The Horticulture and Food Research Institute of New Zealand Ltd
Journal of Sensory Studies | Year: 2010

Papaya is a popular fruit among Brazilian consumers, but one problem is that fruit ripens quickly due to the high temperatures of the country. Irradiation is an effective way of slowing down ripening, hereby increasing shelf-life, but consumer acceptance of this novel technology is paramount for its successful introduction by industry. Using conjoint analysis, this research measures consumer acceptance of irradiated papaya fruit in a sample of urban Brazilian consumers. The study assesses the joint influence of product appearance, price and information about the use of irradiation for consumer choice. Real fruit was used and consumer responses were collected through intercept interviews in supermarkets. These two empirical aspects add external validity to the research. The responses from a convenience sample of 168 consumers from Rio de Janeiro revealed that the product appearance, as a proxy for product quality, was the most important factor influencing decision to purchase papaya. Price was of lesser importance. The participants in this study did not reject papaya due to the labelled information about the use of irradiation. This suggests irradiation as a viable alternative for fruit producers. Consumers demonstrated no knowledge about food irradiation, and education initiatives may be useful as a strategy to aid commercial introduction of irradiated papaya in Brazil. © 2009, Wiley Periodicals, Inc.

Mitchell J.S.,The Horticulture and Food Research Institute of New Zealand Ltd
Methods in molecular biology (Clifton, N.J.) | Year: 2010

Sensitive detection of small molecules using surface plasmon resonance (SPR) presents significant challenges as the antigen cannot serve as a signal generator because of its low mass; efficient binding of the target requires the binding event to be spaced from the sensor surface through a specialist linker conjugation. Competitive immunoassay of steroid hormones can be performed by conjugation through a rationally designed linker system at positions distant from existing antigenic functional groups. The binding signal from the primary antibody can then be further enhanced by sequential addition of secondary antibody or conjugated gold nanoparticles which can produce 13-fold signal enhancements through both their mass and co-operative plasmon coupling.

JENKINS GROUP Ltd, The Horticulture and Food Research Institute of New Zealand Ltd | Date: 2008-05-20

Scientific, optical, weighing, and measuring apparatus and instruments, namely, aroma sensors. Adhesive labels; paper labels.

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