Evaluation of a maltodextrin gel as a partial replacement for fat in a high‐ratio white‐layer cake

The performance of maltodextrin gel as a replacement (25%, 50%, 75% and 100%) for shortening along with sucrose and high fructose corn syrup‐90 (HFCS‐90), adjusted for sweetness in each treatment, was evaluated in a high‐ratio white‐layer cake formulation. Two controls were used as a reference to fat‐replaced cakes: control A (100% fat and 100% sucrose) and control B (100% fat with 50% sucrose/50% HFCS‐90), which closely matched the sugar system of the fat‐replaced cakes. Volume of cakes showed that treatment F (100% fat‐substituted) was significantly (P < 0.05) different from the other treatments. Crust and crumb L‐ and b‐values indicated that control B produced a dark crust (P < 0.05) with a light crumb (P < 0.05) whereas treatment E (75% fat substituted) produced a light crust (P < 0.05) and treatment F a darker crumb (P < 0.05) with a significantly (P < 0.05) higher moisture content. Degree of staling significantly (P < 0.05) increased over time for all treatments. Sensory results indicated that treatment F produced a significantly (P < 0.05) moister, less adhesive and cohesive cake. Tenderness and sweetness scores indicated that treatments E and F were significantly (P < 0.05) tougher and less sweet, respectively, when compared with the other treatments. Results from both the physical and sensory analyses indicated that the combination of maltodextrin gel up to a 75% reduction for shortening and sucrose/HFCS‐90 resulted in satisfactory cakes.     

Effects of selected emulsifiers,enzymes and a carbohydrate-based fat substitute on physical and sensory characteristics in a low-fat muffin

Abstract Selected emulsifiers, enzymes and a carbohydrate-based fat substitute were incorporated into a standard muffin recipe, and their effects were compared with a full-fat counterpart. The control muffin had a significantly (P<0·01) more yellow crumb, was less firm (P<0·01) and contained less moisture (P<0·01). Sodium stearoyl-2-lactylate (SSL) and diacetyl tartaric acid methyl esters (DATEM) contributed to a less firm crumb (P<0·01) and helped to maintain moisture (P<0·01) in the fat-reduced muffin. Sensory analysis yielded complementary results to the physical data with respect to crumb firmness and crust colour. However, the full-fat muffin was significantly (P<0·01) moister. The emulsifiers along with the enzymes were found to be responsible for reducing crumb size (P<0·01).     

The synergistic effects of maltodextrin and high‐fructose corn sweetener 90 in a fat‐reduced muffin

Low‐fat muffins were prepared using as fat substitutes a combination of maltodextrin and high‐fructose corn sweetener 90 (HFCS‐90), which replaced sucrose at a rate of 25%, 50%, 75% and 100%. The focus of the investigation was to determine the synergistic effects of these two ingredients on the physical properties in a low‐fat muffin. Results indicated that maltodextrin and HFCS‐90 were effective in maintaining moisture and water activity (a_w) levels similar (P > 0.05) to the full‐fat muffin. Texture profiles indicated that the low‐fat variations were firmer (P < 0.05) than the full‐fat counterpart. Increased levels of HFCS‐90 had a significant effect (P < 0.05) on crust and crumb darkening. Maltodextrin alone significantly (P < 0.05) impeded the staling rate during storage. However, when maltodextrin was combined with increased levels of HFCS‐90, the staling rate accelerated. The two ingredients were found to be effective in maintaining product quality, but HFCS‐90 could only be used up to a 50% replacement before any adverse effects in product quality were observed.     

Modified oatmeal and chocolate chip cookies: evaluation of the partial replacement of sugar and/or fat to reduce calories

Oatmeal and chocolate chip cookies were prepared using a non‐sucrose sweetener blend (dextrose/acesulfame‐K) and/or prune puree to replace 50% of the sugar and/or fat, respectively, following manufacturers’ recommendations. Similar effects of modification were found for both cookie types. Specific gravity (P < 0.05) and water activity (P < 0.05) increased with modification; cookie spread (P < 0.05) decreased. Probing (P < 0.05) revealed that the increase in hardness and chewiness associated with fat reduction was moderated to some extent when coupled with sugar reduction. Sensory assessments of texture using the Consumer Profile Ballot reflected the instrumental textural assessment. There were few significant sensory differences between the full‐fat/full‐sugar control oatmeal cookie and either modified oatmeal cookie. In chocolate chip cookies, sensory results (P < 0.05) suggest an increase in off‐flavours and bitterness, and a decrease in sweet and buttery attributes with modification. Panelists indicated that all formulations of each cookie type were acceptable with ratings above mid‐point on the scale for flavour and texture acceptability. Total fat reduction was 32% and 45% in the oatmeal and chocolate chip cookies respectively. Caloric reductions were 14–15% in the modified oatmeal cookies, and 12–13% in the modified chocolate chip cookies.     

Comparative study of properties and acceptability of Haitian and US honey‐roasted peanuts

A honey‐roasted peanut product, flavoured with ginger and anise, was recently developed in Haiti in an effort to increase the consumption of locally grown peanuts. The objective of this study was to compare quality and consumer acceptability of the Haiti product with a traditional US‐manufactured brand. Haitian panellists (199) evaluated colour, appearance (dry/oily), crunchiness, peanut flavour and sweetness of the products using five‐point just‐about‐right scales. Colour (Minolta chromameter), hardness (TA.XT2i texture analyser fitted with a TA42 knife blade) and moisture (Denver IR‐30 moisture analyser), lipid (ethyl ether extraction) and sugar (Dionex DX‐500 high pressure liquid chromatography system) contents of the products were also determined. The Haiti product was significantly (P < 0.05) darker brown, harder and contained more (P < 0.05) sucrose and glucose but less (P < 0.05) lipid and fructose than the US product. Panellists indicated that crunchiness, peanut flavour and sweetness of both products were just right. The US product had acceptable appearance but was rated too light (hue angle = 69.6 ± 0.70, L‐value = 58.2 ± 0.47) in colour, whereas the Haiti product appeared too dry and dark (hue angle = 62.6 ± 2.79, L‐value = 44.6 ± 2.22). The Haiti peanuts were not deskinned, and their testae may have decreased the acceptability of the product's appearance and colour. The Haiti product was significantly (P < 0.05) just right to the female panellists and to the 21‐year plus panellists from all income groups. Deskinning of the peanuts and increased oil addition during roasting may improve the acceptability of the Haiti product, especially to 14–20 year olds. Decrease in sugar content may also make the Haiti product more appealing to this age group and to male Haitians.     

The attitudes and nutritional knowledge of 11‐ to 12‐year‐olds in Merseyside and Northern Ireland

School is a major area for providing young people with nutritional knowledge and skills. In Northern Ireland home economics (HE) is taught to 11‐ to 12‐year‐olds. The 1988 Education Reform Act introduced the national curriculum and HE as a subject was effectively abolished in English schools, and key stage 3 pupils in England are taught nutrition in Science, Design and Technology and in the cross curricular theme of health education. The aim of the study was to compare the attitudes and nutritional knowledge of children in Merseyside, England (M) and Northern Ireland (NI). A questionnaire was designed, which examined attitudes to aspects of healthy eating and tested the subject's knowledge, practical and theoretical, on nutrition and healthy eating. Subjects aged 11–12 years were recruited (M: 541, NI: 128). The majority ‘understood and knew what to eat to have a healthy diet’, ‘liked the taste of healthy food’ and considered that ‘there were healthy foods at home’. However, a significantly greater number in Merseyside agreed that ‘their health will be affected in the future by what they eat now’ (M: 71%, NI: 54%, P < 0.01) and agreed that ‘they enjoyed cooking’ (M: 76%, NI: 56%, P < 0.01). Whereas more from Northern Ireland agreed that ‘they do not know what foods to eat to have a healthy diet’ (M: 14%, NI: 30%, P < 0.01), ‘that healthy eating involved “dieting” ’ (M: 29%, NI: 59%, P < 0.01) and agreed that ‘there are no healthy food choices at school’ (M: 23% NI: 42%, P < 0.01). More subjects from Merseyside disagreed that ‘healthy eating is a waste of time’ (M: 87%, NI: 77%, P < 0.01). The mean knowledge scores (correct answers) from Merseyside were significantly greater than from Northern Ireland (total score: M: 51%, NI: 43%P < 0.05; practical score: M: 58%, NI: 49%P < 0.05, theory score: M: 38%, NI: 31%, P < 0.05). The results indicate that the healthy food message seems to have been better learnt by children in Merseyside but results of surveys in Merseyside into eating habits suggest that many have not put this knowledge into practice.     

Consumer acceptance and physicochemical quality of osmodehydrated carambola (Averrhoa carambola L.) slices

Consumer acceptability and physicochemical properties of candied osmodehydrated (OD) carambola were evaluated in an effort to increase consumption of the fruit. Fresh carambola slices (Averrhoa carambola L.) were soaked in either 15% or 20% or 25% NaCl brine for 18 h, then in 40 °Brix sucrose for 18 h, followed by 60 °Brix sucrose for 18 h and dried at 55°C for 18 h. Slices soaked in 15% NaCl were most preferred by a focus group. Decreases in pH, total soluble solids (TSS) and increase in salinity were recorded in sucrose solutions after soaking carambola. During osmosis, carambola became less green and more orange‐yellow (P < 0.05). The pH of candied OD products varied between 3.62 and 4.16, salinity 16–28 ppt, TSS of 67–70 °Brix and 18.8–20.8% moisture. There were no differences (P > 0.05) in flavour or texture for products brined in 15% NaCl and soaked in either refined white sucrose (RS) solutions or brown unrefined sucrose (URS) syrups, but differences (P < 0.05) in appearance, colour and overall acceptability. Candied RS carambola had higher (P < 0.05) overall acceptability (6.2 – liked slightly to moderately) to products from URS (5.6 – neither liked nor disliked to liked slightly), which was also supported by paired preference testing. Flavour was most liked (P < 0.05) of all sensory attributes.     

Pilot intervention with adolescents to increase knowledge and consumption of folate‐rich foods based on the Health Belief Model

Folate is important in the prevention of birth defects and in the maintenance of general health. Even after mandatory fortification, many people are still not consuming the recommended dietary allowance (RDA) of 400 mcg folate/day. Consuming a diet rich in naturally high‐folate foods, as opposed to supplementation, may offer additional health benefits and promote an overall healthy diet. The purpose of this pilot study was to test the hypothesis that a learner‐centred educational intervention based on the Health Belief Model (HBM) will successfully increase knowledge and consumption of folate‐rich foods, while increasing positive beliefs about folate and health in adolescents. A two‐group parallel control trial was conducted in two schools in Nebraska. Pre‐ and post‐study questionnaires included a folate‐based food frequency questionnaire, a HBM questionnaire and a folate knowledge test. Participants in the intervention group completed a post‐study evaluation. The intervention consisted of three 30‐min lessons followed by participant creation of podcasts. One podcast was viewed each week for 8 weeks following the lessons. Data were analysed using t‐tests to measure simple effects within the intervention and control groups, and analysis of variance to measure within‐subject effects between the groups. Folate consumption decreased in both the intervention and control groups, but these differences were not significant (P > 0.05). Significant increases (P = 0.000) in folate knowledge occurred in the intervention group. This difference remained significant (P = 0.001) when compared to the control group. Average HBM rankings significantly decreased (P < 0.05) towards ‘strongly agree’ (Likert scale of 1–6) in the intervention group (P < 0.05) for all constructs except cues to action. However, when compared to the control group, these differences were only significant for self‐efficacy and perceived susceptibility. Creating and viewing podcasts may be helpful for the retention of knowledge over time, but did not appear to be an effective cue to action for increased folate‐rich foods in this pilot study.     

Evaluation of fat replacers Avicel™, N Lite S™ and Simplesse™ in mayonnaise

Samples of mayonnaise were prepared in which the oil content was reduced from 30% to 10% and replaced with the fat replacers, Avicel, N Lite S and Simplesse. The control sample had a significantly higher viscosity (P < 0.001) and droplet size (P < 0.01) than the samples containing the replacers. There was a significant (P < 0.001) correlation (r = 0.97) between viscosity and droplet size. Sensory analysis also showed that the control had significantly higher scores (P < 0. 001) for the attributes of thickness, meltability, glossiness and oiliness. There was a significant (P < 0.05) correlation (r = 0.93) between viscosity and sensory thickness. However, there was no significant preference for any of the samples, showing that variations in physical properties and sensory profile attributes do not necessarily affect preference. The use of the replacers reduced the energy values of the mayonnaises by 52% to 55%.     

Parental perception and attitudes on infant feeding practices and baby milk formula in East Malaysia

A survey on infant feeding and weaning practices of 505 respondents who had children currently aged between 0 and 6 years old was carried out in Kota Kinabalu, Sabah. The decisive factors, which influence parents’ purchase decision of infant and follow‐up formula were also determined. Initiation of breastfeeding was practised by 86.3% of respondents, but only 8.3% of 436 respondents exclusively breastfed for 6 months and beyond. An association was established where parents with a higher educational level (χ ² = 70.191, d.f. = 28, P < 0.001) and household income (χ ² = 74.863, d.f. = 28, P < 0.001) were found to have a higher tendency in initiating formula feeding earlier. Parents who practised partial breastfeeding (OR = 2.0) and had a shorter duration of breastfeeding (OR = 2.4), respectively, were at least two times more likely to initiate early formula feeding. Parents who were highly educated (χ ² = 99.107, d.f. = 9, P < 0.001) and had a higher income (χ ² = 96.501, d.f. = 12, P < 0.001) also tended to wean their babies earlier. Parents became acquainted to infant and follow‐up formulas mainly through advertisement and promotion (32.9%). Quality and brand were the two most influential factors in determining parents’ purchase decision on infant and follow‐up formulas. Most respondents within the same income range were also found to purchase the same brands of baby formulas. Although breastfeeding is widely practised, its prolongation is still hindered by many social constraints such as lack of facilities and support in the workplace to encourage mothers to breastfeed and therefore most parents resolved to early formula feeding for their convenience.     

Chinese dietary culture influences consumers' intention to use imported soy‐based dietary supplements: an application of the theory of planned behaviour

The over‐saturated dietary supplement (DS) market in developed countries such as the US spurs the need for foreign market expansion, and the Chinese market provides a great potential for the foreign soy‐based DS industry. This study examined Chinese consumers' intention to use imported (US‐made US‐brand) soy‐based DS based on the Theory of Planned Behavior (TPB). Two alternative models were also examined in which Chinese dietary culture variables, including soyfoods favourability and dining‐out sociability, as well as their interactions with attitudes, were integrated into the TPB model. A cross‐sectional, self‐administered survey was conducted with a sample of 215 subjects (137 females; 78 males) in Shanghai, China. The TPB variables attitude, subjective norm, perceived behaviour control and behavioural intention, as well as the Chinese dietary culture variables: soyfoods favourability and dine‐out sociability were measured. Multiple linear regressions were used to analyze the three models. The statistical results indicated that all three models were statistically significant to predict intention (Model 1: R² = 0.473, P < 0.001; Model 2: R² = 0.505, P < 0.001; Model 3: R² = 0.525, P < 0.001). The results also showed that attitude, perceived behavioural control, and dine‐out sociability were significant (positive) determinants of intention. Soyfoods favourability acted a significant (negative) moderator of the relationship between attitude and intention. Subjective norm had no significant impact on intention. In conclusion, the TPB model was useful to predict Chinese consumers' intention to use imported soy‐based DS, but not all the TPB components weighed significantly in exploring DS consumption in China. The selected Chinese dietary culture variables were much more important predictors than subjective norm. This study makes a significant contribution in the application of the TPB model and in market strategy development for imported dietary supplements in China.     

Effect of deep‐fat frying of potato chips and chicken on the quality of soybean oil

The type of products may affect the quality of oil during deep‐fat frying. The quality changes in pure soybean oil during frying of potato chips and chicken drumsticks were evaluated and compared. The oil was subjected to continuous frying at 180°C for a period of 315 min. The parameters used to assess the oil quality were peroxide value (PV), iodine value (IV), free fatty acids (FFA), refractive index (RI) and colour. The percentage of oil absorbed by the two products was determined. The oil was also assessed visually for any change in colour, viscosity, turbidity, flavour and deposit. Results showed that, for both products, PV, IV, FFA, RI and colour changed significantly with time (P < 0.05). Potato absorbed oil during frying (6.9%), whereas chicken released fat into the frying medium (2.4%). When the rates of change of the various parameters in the oils were compared for the two products, significant differences (P < 0.05) were noted for PV and colour only. The oil used during the frying of chicken appeared visually to be at a more advanced stage of deterioration.     

Parents’ knowledge,behaviour and concerns of food chemical hazards: Korean mothers sending their preschool‐aged children to child care centres

Although incidences of foodborne illness caused by chemical hazards are increasing, the studies on public awareness of food chemical hazards are limited. This study was conducted to assess mothers’ knowledge, behaviour and concerns on diverse food chemical hazards. A total of 960 mothers sending their preschool‐aged children to child care centres in Gwanak‐Gu, Seoul, Korea were surveyed, and 633 (65.9%) returned the questionnaires. After excluding inappropriate questionnaires, 364 (37.9%) were analysed. The majority of the mothers were able to identify food categories containing acrylamide (83.2%) and trans fat (80.2%), while slightly over half of the mothers named food categories containing allergen (56.3%) or pesticide residues (57.1%). Less than two thirds of mothers were knowledgeable of human exposure pathway to environmental contaminants (59.3%), acrylamide (55.2%) or heavy metals (65.9%). A significant number of mothers showed familiarity on health risk from dietary exposure to environmental contaminants (82.4%), trans fat (91.5%) or heavy metals (96.7%) (P < 0.05). The data on safe food behaviour towards environmental contaminants (81.8%), acrylamide (98.0%), heavy metals (96.7%) and trans fat (90.6%) showed high levels of right behaviours. About 47.2% and 22.8% of mothers read label of food additives and ingredient statement on allergen when purchasing processed foods, respectively. Mothers seemed to be concerned about food chemical hazards. Among the sociodemographic characteristics, only age significantly differentiated mothers’ concerns on chemical hazards in foods (P < 0.05). This study suggests that mothers needed to be educated on food chemical hazards regardless of their education levels, occupation status or the number of child.     

Sensory characteristics of fufu prepared with cassava roots (Manihot esculenta Crantz) stored in polyethylene sacks

This study was carried out to assess the effect of storage of cassava roots in polyethylene sacks for periods of 2, 4, 6 and 8 weeks on the sensory characteristics of cassava fufu, a popular Ghanaian dish. Freshly harvested cassava roots were dipped in tap water and packed into polyethylene sacks in 2‐kg batches and stored at room temperature (25°C ± 1°C). Samples of fresh cassava fufu were evaluated and then at two weekly intervals for a period of 8 weeks. Attributes evaluated were colour, smell, elasticity, smoothness and taste. A structured six‐point ranking scale ranging from 6 (excellent) to 1 (very poor) was used for the evaluation. The data were analysed using analysis of variance, and the least significance difference test at P < 0.05 was used to determine differences between means. The results showed that storage of cassava roots for up to 8 weeks did not significantly affect the colour, smell, elasticity and taste of cassava fufu. However, smoothness of fufu prepared with cassava stored for 6 and 8 weeks was significantly different from the samples of the fresh cassava, and those stored for 2 and 4 weeks. It was concluded that cassava roots stored for periods up to 8 weeks in polyethylene sacks produced fufu of similar characteristics as fresh cassava fufu. This method is therefore recommended for use by homemakers, food service operators, cassava retailers and processors to save them time, energy and money used for the frequent trips for purchases. The method would also reduce post‐harvest losses to a large extent.     

Pre‐purchase and post‐purchase satisfaction and fashion involvement of female tennis wear consumers

This study examined the relationship among pre‐purchase and post‐purchase satisfaction and fashion involvement of women who participated in tennis. As women's activities in sports, including tennis, are growing, it is necessary to investigate their clothing needs in order to meet consumers’ needs. A final sample consisted of 124 women who attended a Cortec United States Tennis Association Women's Pro Tournament. The questionnaires were personally distributed and collected during the tournament. The theoretical base for this study was the Engel, Blackwell, and Miniard model on consumer decision making. There was a positive significant relationship between pre‐purchase satisfaction and post‐purchase satisfaction (P < 0.01). There was a positive significant relationship between pre‐purchase satisfaction and fashion involvement (P < 0.001). Also, there was a positive significant relationship between post‐purchase satisfaction and fashion involvement (P < 0.001). Comfort was identified as the most important clothing attribute and fit the second most important for women to achieve satisfaction before and after purchasing tennis apparel. Seventy‐two percent of the women indicated the need for improved fit of tennis wear. Women of all ages reported garment length as a problem for each garment type. Two major reasons for not purchasing tennis clothing were high prices and inappropriate sizes.     

Sraffian Thoughts in Full Marginalist Dress

In the single‐products economy considered here, every industry has a constant‐elasticity‐of‐substitution unit cost function; moreover that constant‐elasticity‐of‐substitution is the same for each industry (0 < σ < 1). When this strongly ‘marginalist’ system is looked at from a Sraffian perspective, it is found that some significant properties of the system are not in line with normal marginalist expectations.     

THE DOTHAN PRICING MODEL REVISITED

We compute zero‐coupon bond prices in the Dothan model by solving the associated PDE using integral representations of heat kernels and Hartman–Watson distributions. We obtain several integral formulas for the price P(t, T) at time t > 0 of a bond with maturity T > 0 that complete those of the original paper of Dothan, which are shown not to always satisfy the boundary condition P(T, T) = 1 .     

Consumer perception of packaging: An eye‐tracking study of gluten‐free cookies

The growing interest in gluten‐free products makes it crucial to understand the mechanism of consumers' perception of gluten‐free claims. Due to the limited research measuring the influence of the type (verbal/nonverbal), number and location of gluten‐free statements on product labels on visual attention and consumers' purchase decisions, the main aim of this research was to evaluate the perception of gluten‐free claims and the Crossed Grain symbol on cookie packages of both consumers who are on a gluten‐free diet and those who are not. To that end, a questionnaire survey (600 respondents) and an eye‐tracking study (67 respondents) were carried out. The results showed that the respondents are aware of the basic rules of gluten‐free products' labelling, but 32% of those on the diet claimed that the products were not labelled properly. The analysis proved (p < .05) the significant relation between the number of gluten‐free claims and consumers' purchase intention. The respondents paid more attention to verbal gluten‐free claims than to nonverbal ones on packaging (p < .05). In the case of the Crossed Grain symbol, addition of verbal statement strengthened the information and decreased the respondents' level of uncertainty about a given product, which is important, especially for people newly adopting the diet. No difference in the visual attention to gluten‐free statements between the followers and non‐followers of the diet was found (p > .05), which allowed us to conclude that the perception of gluten‐free claims is an automatic process. These results suggest that designing product labels by considering the information architecture concerning gluten may help strengthen consumers' attitudes towards gluten‐free products and impact buying behaviour.