Liliane Elen da Silva Moraes

Bio: Liliane Elen da Silva Moraes is an academic researcher from Universidade Federal de Viçosa. The author has contributed to research in topics: Consumer behaviour & Melatonin. The author has an hindex of 4, co-authored 6 publications receiving 134 citations.

Night milking adds value to cow's milk.

Abstract: BACKGROUND Melatonin is synthesized in greater concentration at night, and it plays an important role in sleep regulation. This study aimed to evaluate the melatonin concentration in milk collected by milking during the night and evaluates its effect, with or without tryptophan supplementation, in the sleep quality of adult Wistar rats. RESULTS A difference (P 0.05) from the M15h group in terms of the levels of blood melatonin and urinary sulfatoxymelatonin, but differed from groups M2h and M2hT, whereas group M2hT presented higher blood melatonin and urinary sulfatoxymelatonin concentrations. CONCLUSION Combining the techniques of night milking with tryptophan supplementation resulted in production of milk that improves sleep quality in rats. © 2013 Society of Chemical Industry

Otimização da aceitabilidade sensorial de requeijão cremoso light

Abstract: Cream cheesecurd is a type of processed cheese, originally Brazilian, produced throughout the entire Brazilian territory with some technological variations. This is one of the main types of cheese produced and consumed in Brazil and it is known for presenting an elevated fat content. On the other hand, the fat plays a fundamental role in appearance, flavor and texture of cheese, then developing a light product with sensory quality similar to the traditional version is a major challenge to food industry. In this context, the objective of this study was to evaluate the chemical composition and sensory acceptability of light cream cheesecurd with different levels of fat reduction for texture and overall impression. The experiment followed a design of response surface, the Central Composite Rotatable Design (CCRD) with two factors (fat and moisture). The sensory acceptability was evaluated by 100 consumers, by the hedonic scale of nine points. The results showed that the cheesecurds with different levels of fat reduction had similar sensory acceptability when combined with a proportional increase in moisture content. The products that presented dry defatted extract (DDE) of approximately 19.3%, originated from different combinations of fat and moisture, were those with better acceptance by consumers, demonstrating the importance of DDE in sensory acceptance.

Fat and moisture contents: determining factors on the light processed cheese texture and acceptability

Abstract: The present study evaluated the effect of fat and moisture on the texture and acceptance of light processed cheese supplemented with whey protein concentrate. Concentrations of fat, moisture, protein, carbohydrates, ash and degreased dry extract (DDE) were determined. The formulations were evaluated instrumentally by texture profile analysis, and sensory acceptability was assessed by 100 consumers. Results were evaluated by analysis of variance, regression models fitting and internal preference mapping. The first grade linear regression model showed the best suitability to the data at 10% of probability. Fat and moisture constituents contributed inversely to the intensity of texture characteristics. Cheesecurds made from different combinations of fat and moisture, with DDE of approximately 19.30%, showed intermediate texture intensities, which were mostly accepted by consumers. These findings indicate that balance in DDE optimizes sensory acceptability. This study demonstrates that fat reduction in cheesecurd should be combined with increased moisture contents, and this procedure enables the industries to offer a diversity of products which meet consumer expectations and also at a lower production cost.

Invited review Quick and dirty but still pretty good: a review of new descriptive methods in food science

Abstract: Summary For food scientists and industrials, descriptive profiling is an essential tool that involves the evaluation of both the qualitative and quantitative sensory characteristics of a product by a panel. Recently, in response to industrial demands to develop faster and more cost-effective methods of descriptive analysis, several methods have been offered as alternatives to conventional profiling. These methods can be classified in three families: (i) verbal-based methods (flash profile and check-all-that-apply), (ii) similarity-based methods (free sorting task and projective mapping aka Napping � ) and (iii) reference-based methods (polarised sensory positioning and pivot profile). We successively present these three classes of methods in terms of origin, principles, statistical analysis, applications to food products, variations of the methods and the Pros and Cons.

Quick and dirty but still pretty good: a review of new descriptive methods in food science

Abstract: Summary For food scientists and industrials, descriptive profiling is an essential tool that involves the evaluation of both the qualitative and quantitative sensory characteristics of a product by a panel. Recently, in response to industrial demands to develop faster and more cost-effective methods of descriptive analysis, several methods have been offered as alternatives to conventional profiling. These methods can be classified in three families: (i) verbal-based methods (flash profile and check-all-that-apply), (ii) similarity-based methods (free sorting task and projective mapping aka Napping®) and (iii) reference-based methods (polarised sensory positioning and pivot profile). We successively present these three classes of methods in terms of origin, principles, statistical analysis, applications to food products, variations of the methods and the Pros and Cons.

Dietary Sources and Bioactivities of Melatonin.

Abstract: Insomnia is a serious worldwide health threat, affecting nearly one third of the general population. Melatonin has been reported to improve sleep efficiency and it was found that eating melatonin-rich foods could assist sleep. During the last decades, melatonin has been widely identified and qualified in various foods from fungi to animals and plants. Eggs and fish are higher melatonin-containing food groups in animal foods, whereas in plant foods, nuts are with the highest content of melatonin. Some kinds of mushrooms, cereals and germinated legumes or seeds are also good dietary sources of melatonin. It has been proved that the melatonin concentration in human serum could significantly increase after the consumption of melatonin containing food. Furthermore, studies show that melatonin exhibits many bioactivities, such as antioxidant activity, anti-inflammatory characteristics, boosting immunity, anticancer activity, cardiovascular protection, anti-diabetic, anti-obese, neuroprotective and anti-aging activity. This review summaries the dietary sources and bioactivities of melatonin, with special attention paid to the mechanisms of action.