摘要:

ABSTRACT.Three methods of threshold estimation are compared for the detection of 1,8‐cineole added to Concord grape juice presented in a semi‐ascending paired difference design (Lundahl et al. 1986). Method A tests the significance of obtaining a nonzero response, method B determines the transition point of a 2‐phase linear model fitted to the data, method C fits a logistic model to the data and defines threshold as the point of maximum curvature, Cmax, of the curve. Method A yields interval estimates of thresholds, the midpoints of which systematically decrease with increasing sample size. Methods B and C yield point estimates of thresholds which do not systematically decrease with increasing sample size, are a feature of the dose‐response curve, and are similar in value to eac

ISSN:0887-8250    

DOI:10.1111/j.1745-459X.1991.tb00515.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

ABSTRACT.Two studies are reported on the effect ofingestion on the relative‐to‐ideal ratings of salt in soup. In the first study there was a reduction in the measure of ideal concentration from pre‐ to post‐ingestion, with subjects consuming the soups ad libitum. However, a measure of ideal concentration derived from several small samples presented in each session agreed well with the final post‐ingestion ideal. A measure of most preferred concentration of salt based on total soup consumption was unrelated to the other measures.In the second experiment, the post‐ingestion decrease in most preferred salt concentration was replicated when subjects consumed a fixed quantity of soup. The post‐ingestion ideal was similar to that derived from rating either several small samples in one session or one single small sampl

ISSN:0887-8250    

DOI:10.1111/j.1745-459X.1991.tb00516.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

ABSTRACT.A quality control chart technique was tested for feasibility in measuring panelist performance in product profile development. The descriptive sensory score sheet evolved by Filipino trained panelists for fresh‐frozen young coconut meat and water at “malakanin”(7–8 months old coconut fruit) stage was utilized for this study. A comparison of panelist performance in terms of their congruence, within themselves and between each other, in identifying the intensity or presence of an attribute was made. Results indicated that a similar measurement of significant differences could be obtained using both the analysis of variance (ANOVA) approach and the control chart (c.c.) technique. Considering the volume of data to be handled, the c.c. technique appeared to be more manageable than ANOVA. Besides, the c.c. was found by the panelists and the researchers to be more interesting to analyze, easier to apply, to interpret and to use for improvement follow‐through compared to

ISSN:0887-8250    

DOI:10.1111/j.1745-459X.1991.tb00517.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

ABSTRACT.Eighteen commercial cat litters were characterized for the following physical characteristics: water holding capacity, drying time, pH, cost, density, residual water, and particle size. Using sensory analysis, eight of the litters were evaluated for dustiness, clumpability and odor control before and after use and storage. The cat litters differed substantially in both physical and sensory properties. The crystal litters were noted for their small uniform size, high water holding capacity and clumpability. The recycled litter was most dusty and ammoniacal; whereas, the granule litter had an innately offensive odor. The alfalfa litter had superior odor control, but neither clumped nor dried well. The clay litters could be differentiated by pH, residual water, water holding capacity and could be classified as either perfumed and nonperfumed. Some of the perfumed litters became intensely perfumed when used and stored; whereas, the other perfumed litters behaved like the nonperfumed litters and became more offensive.

ISSN:0887-8250    

DOI:10.1111/j.1745-459X.1991.tb00518.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY