June Online Cover
: Photographs before cooking and husk removal of the five bunya nut samples and the chestnut sample evaluated in the study, sensory profiles of bunya nuts vs. chestnuts and of ...boiled vs. roasted bunya nuts, and PCA bi‐plot of the sensory properties of 12 samples, from “Sensory properties of Australian bunya nuts” by Jaqueline Moura Nadolny, Odette Best, Emma Hassall, Heather M. Shewan, Sandra M. Olarte Mantilla, Jason R. Stokes, Heather E. Smyth. p. 2732–2743.
Commercially available convenience rice such as retorted, quick cooking or frozen rice suffers from sensory deficiencies compared to home cooked rice. The mechanisms causing deterioration in texture ...and flavour during convenience rice processing are, in many cases, poorly understood.
This review describes pre-cooking methods including washing and soaking, cooking methods including cooking in excess water, by absorption and by high pressure, and post-cooking technologies including cooling, freezing, retorting, canning, drying and storage, as well as the influence of each process on physical properties and sensory attributes of cooked rice.
Water diffusion and starch leaching, which occur in many processing steps, are important factors affecting cooked rice quality. Soaking saves energy by reducing cooking time. Cooking by absorption increases stickiness, but does not ensure uniform moisture distribution compared to cooking in excess water, thus is not applicable for rice manufacturers. Amylose leaching during soaking and cooking affects hardness and stickiness of cooked rice significantly. Non-thermal treatments such as high pressure soaking and cooking have potential to improve rice sensory properties compared to high temperature treatments, which change colour and flavour of convenience rice. Drying and freezing results in a porous structure resulting in spongy texture after rehydration and thawing, respectively. During storage, starch retrogradation deteriorates texture, but can be retarded by high pressure processing or storage below the glass transition temperature. Much is known about processing factors that affect freshly cooked rice, but more substantial knowledge of how processing steps affect the structure property relationships and sensory properties of convenience rice will assist manufacturers to specifically design products to meet the ever growing consumer demands for convenience food.
•Processing related reduction of convenience rice quality is mechanistically explained.•Flavour deteriorates as volatile profiles are altered by thermal processes and storage.•Cooked rice texture is dependant on the rate and extent of water and starch diffusion.•Different mechanisms in high pressure processes may improve convenience rice quality.
Acute pain signaling has a key protective role and is highly evolutionarily conserved. Chronic pain, however, is maladaptive, occurring as a consequence of injury and disease, and is associated with ...sensitization of the somatosensory nervous system. Primary sensory neurons are involved in both of these processes, and the recent advances in understanding sensory transduction and human genetics are the focus of this review. Voltage-gated sodium channels (VGSCs) are important determinants of sensory neuron excitability: they are essential for the initial transduction of sensory stimuli, the electrogenesis of the action potential, and neurotransmitter release from sensory neuron terminals. Na
1.1, Na
1.6, Na
1.7, Na
1.8, and Na
1.9 are all expressed by adult sensory neurons. The biophysical characteristics of these channels, as well as their unique expression patterns within subtypes of sensory neurons, define their functional role in pain signaling. Changes in the expression of VGSCs, as well as posttranslational modifications, contribute to the sensitization of sensory neurons in chronic pain states. Furthermore, gene variants in Na
1.7, Na
1.8, and Na
1.9 have now been linked to human Mendelian pain disorders and more recently to common pain disorders such as small-fiber neuropathy. Chronic pain affects one in five of the general population. Given the poor efficacy of current analgesics, the selective expression of particular VGSCs in sensory neurons makes these attractive targets for drug discovery. The increasing availability of gene sequencing, combined with structural modeling and electrophysiological analysis of gene variants, also provides the opportunity to better target existing therapies in a personalized manner.
The effects of fresh and dried Flammulina velutipes (FFV and DFV) on quality and sensory characteristics of Cantonese sausages were investigated. Sausage samples were prepared by adding 0% (control), ...2.5% FFV, 2.5% and 5.0% DFV, respectively, and their nutritional compositions, free amino acid profiles, lipid and protein oxidation, color and texture properties were determined. Addition of F. velutipes significantly decreased fat content while increased free amino acid contents of Cantonese sausages. Total free amino acid contents of 2.5% FFV, 2.5% DFV and 5.0% DFV incorporation were 2.8-, 2.4- and 3.5-fold as compared to control, respectively. Lipid and protein oxidation of Cantonese sausages were effectively inhibited by the addition of F. velutipes. Both FFV and DFV addition decreased hardness and chewiness while showed different effect on yellowness of samples. DFV added at 2.5% exhibited the best overall sensory acceptance. Therefore, appropriate addition of F. velutipes may be an effective way to improve meat product quality and function.
•The quality and sensory characteristics of sausages can be improved by addition of F. velutipes.•Addition of F. velutipes significantly decreased fat content of Cantonese sausages.•Lipid and protein oxidation can be effectively inhibited by the addition of F. velutipes.•Sausages incorporated with 2.5% dried F. velutipes showed the best overall sensory acceptance.
Structuring processes for meat analogues Dekkers, Birgit L.; Boom, Remko M.; van der Goot, Atze Jan
Trends in food science & technology,
11/2018, Volume:
81
Journal Article
Peer reviewed
Open access
Animal-derived protein foods, such as meat, have a large impact on the environment. Meat analogues are products that replace meat in its functionality, i.e. have similar product properties and ...sensory attributes, which is achieved by the fibrous nature of those products.
The techniques used to make fibrous products that mimic muscle meats are outlined and categorized based on their approach. The bottom-up approach refers to assembly of structural elements that are combined. The top-down approach refers to structuring of biopolymer blends using an overall force field. The strengths and weaknesses of these approaches are discussed in terms of ingredient and equipment use, (achievable) product resemblance, robustness, scalability, and resource efficiency. To enlarge the theoretical framework, the techniques with the top-down strategy are further contextualized by relating to structure formation processes of materials with other applications, and the methods to analyse the fibrous structures are further outlined.
Techniques that follow the bottom-up strategy have the potential to resemble the structure of meat most closely, by structuring the proteins hierarchically through assembly of individual structural components. The top-down strategy is better scalable, is more efficient in its use of resources, but can only create the desired structure on larger length scales. Significant progress has been made on the methods to analyse structured products from the last category. Most analysis methods focussed on the (micro)structural anisotropy of the fibrous products, however there is also a need for methods that allow in situ analysis of the evolution of the structure during processing.
•Fibrous products can form the basis for plant-based meat analogues.•Techniques for creating fibrous protein products follow a bottom-up or a top-down strategy.•A bottom-up strategy has potential to resemble the hierarchical structure of meat best.•Top-down strategy is more robust, scalable and have better resource efficiency.•Dedicated in situ analysis of structuring processes have to be developed.
Abstract
April Online Cover
: Mandarin‐like
Citrus x Poncirus trifoliata
hybrid with inset of pure
Poncirus trifoliata
fruit from Feature Article, “Sensory quality of Citrus scion hybrids with
...Poncirus trifoliata
in their pedigrees”, by Sophie C. Deterre, Kristen A. Jeffries, Greg McCollum, Ed Stover, Clotilde Leclair, John A. Manthey, Jinhe Bai, Elizabeth A. Baldwin, Smita Raithore, and Anne Plotto. Photo credit: Randall Driggers, USDA.
We have come to recognize the brain as a predictive organ, anticipating attributes of the incoming sensory stimulation to guide perception and action in the service of adaptive behaviour. In the ...quest to understand the neural bases of the modulatory prospective signals that prioritize and select relevant events during perception, one fundamental dimension has until recently been largely overlooked: time. In this Review, we introduce the burgeoning field of temporal attention and illustrate how the brain makes use of various forms of temporal regularities in the environment to guide adaptive behaviour and influence neural processing.
Frozen foods are among the most popular food products and the development of techniques for the rapid detection of their structures and quality is important for the frozen food industry. In the ...current review, the principles and applications of Raman spectroscopic techniques in detecting and evaluating the structure changes and quality of frozen foods are discussed and merits and drawbacks of each Raman type are presented. These techniques include dispersive, Fourier transform, spatially offset, micro Raman spectroscopies. Raman spectroscopy can assess the compositional, physicochemical, and sensory characteristics of the frozen foods without any pretreatment. It can also be applied to investigate the structural alterations of protein, lipid, water and other components. Further trends of developing the Raman spectroscopy in monitoring the frozen foods should focus on reducing overlapping signals, achieving real noninvasive detection, eliminating misclassification and quantification errors, establishing standardized Raman database, and controlling cost.
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