As consumption of fish and fish-based foods increases, non-destructive monitoring freshness also becomes more prominent. Fish products are very perishable prone to microbiological growth, not always easily detected by organoleptic evaluation. The analysis the headspace specimens through gas sensing is an interesting approach monitor freshness. Here we report a method for Tilapia spoilage based on application single sensitive gel material coupled optical electronic nose. signals sensor extent...

Relative humidity is simultaneously a sensing target and contaminant in gas volatile organic compound (VOC) systems, where strategies to control interference are required. An unmet challenge the creation of gas-sensitive materials response controlled by material itself. Here, effects through design gelatin formulations ionic liquids without with liquid crystals as electrical optical sensors, respectively. In this design, anions [DCA]

The cooperative assembly of biopolymers and small molecules can yield functional materials with precisely tunable properties. Here, the fabrication, characterization, use multicomponent hybrid gels as selective gas sensors are reported. composed liquid crystal droplets self‐assembled in presence ionic liquids, which further coassemble to form stable matrices. Each individual component be varied acts cooperatively tune gels' structure function. unique molecular environment is explored for...

Silk fibroin is a biobased material with excellent biocompatibility and mechanical properties, but its use in bioelectronics hampered by the difficult dissolution low intrinsic conductivity. Some ionic liquids are known to dissolve removed after processing. However, can cooperatively give rise functional materials, there untapped opportunities this combination. The of fibroin, followed gelation, designer from imidazolium chloride family varied alkyl chain lengths (2–10 carbons) shown here....

Liquid crystal (LC)-based materials are promising platforms to develop rapid, miniaturised and low-cost gas sensor devices. In hybrid gel films containing LC droplets, characteristic optical texture variations observed due orientational transitions of molecules in the presence distinct volatile organic compounds (VOC). Here, we investigate use deep convolutional neural networks (CNN) as pattern recognition systems analyse textures dynamics droplets exposed a set different VOCs. responses...

Liquid crystals (LCs) are prime examples of dynamic supramolecular soft materials. Their autonomous self-assembly at the nanoscale level and further events that give rise to unique stimuli-responsive properties have been exploited for sensing purposes. One key features employ LCs as materials derives from fine-tuning between stability dynamics. This challenging task was addressed in this work by studying effect alkyl chain length cyanobiphenyl on molecular self-assembled compartments...

Artificial olfaction is a fast-growing field aiming to mimic natural olfactory systems. Olfactory systems rely on first step of molecular recognition in which volatile organic compounds (VOCs) bind an array specialized proteins. This results electrical signals transduced the brain where pattern performed. An efficient approach artificial combines gas-sensitive materials with dedicated signal processing and classification tools. In this work, films gelatin hybrid gels single composition that...

Gum arabic (GA) is a hydrophilic composite polysaccharide derived from exudates of Acacia senegal and seyal trees. It biocompatible, possesses emulsifying stabilizing properties has been explored as coating agent nanomaterials for biomedical applications, namely magnetic nanoparticles (MNPs). Previous studies focused on the adsorption GA onto MNPs produced by co-precipitation methods. In this work, thermal decomposition method, known to produce uniform particles with better crystalline...

Magnetic nanoparticles coated with a fucose-rich exopolysaccharide resulted in nanoprobes which effectively internalized into cells. MRI cell labeling was particularly efficient neural stem/progenitor

The fast and non-invasive detection of odors volatile organic compounds (VOCs) by gas sensors electronic noses is a growing field interest, mostly due to large scope potential applications. Additional drivers for the expansion include development alternative sustainable sensing materials. discovery that isolated cross-linked polymeric structures suberin spontaneously self-assemble as film inspired us develop new composite materials consisting liquid crystal (LC). Due their stimuli-responsive...

Liquid crystals represent a fascinating intermediate state of matter, with dynamic yet organized molecular features and untapped opportunities in sensing. Several works report the use liquid crystal droplets formed by microfluidics stabilized surfactants such as sodium dodecyl sulfate (SDS). In this work, we explore, for first time, potential surface-active ionic liquids imidazolium family to generate high yield, stable oriented droplets. Our results show that [C12MIM][Cl], particular,...

Electronic noses (E-noses), are usually composed by an array of sensors with different selectivities towards classes VOCs (Volatile Organic Compounds). These devices have been applied to a variety fields, including environmental protection, public safety, food and beverage industries, cosmetics, clinical diagnostics. This work demonstrates that it is possible classify eleven from chemical using single gas sensing biomaterial changes its optical properties in the presence VOCs. To accomplish...

Ionogel are versatile materials, as they present the electrical properties of ionic liquids and also dimensional stability, since trapped in a solid matrix, allowing application electronic devices such gas sensors noses. In this work, ionogels were designed to act sensitive layer for detection volatiles custom-made nose. Ionogels composed gelatin single imidazolium liquid doped with bare functionalized iron oxide nanoparticles, producing adjustable target selectivity. After exposing an array...

Relative humidity (RH) is a common interferent in chemical gas sensors, influencing their baselines and sensitivity, which can limit the performance of e-nose systems. Tuning composition sensing materials possible strategy to control impact RH sensors. Hybrid gel used as sensors contain self-assembled droplets ionic liquid crystal molecules encapsulated polymeric matrix. In this work, we assessed effect matrix hydrophobic properties hybrid for VOC humid conditions (50% RH). We two different...

This paper describes two methods for the measurement of loft time in vertical jumps using signals from an acceleration sensor. The jump accelerometer characteristic curve is presented and notable regions corresponding to key stages kinetic activity are identified. Using along three dimensions different algorithms were devised compute time. These based on morphology signal. first uses maximum value during landing stage; second interval between minimum values flight stages, respectively. To...

Electronic noses (E-noses) are devices capable of detecting and identifying Volatile Organic Compounds (VOCs) in a simple fast method. In this work, we present the development process an opto-electronic device based on sensing films that have unique stimuli-responsive properties, altering their optical electrical when interacting with VOCs. This interaction results signals can be collected, further processed analysed. Two versions were designed assembled. E-nose V1 is device, V2 hybrid...

The need to develop systems electromyographic (EMG) in the aquatic environment, has led several researchers refine these instruments ensure credibility of data provided by EMG.The aim this study is characterize behavior two muscle muscles involved crawl technique (biceps brachii and triceps brachii) over a test 200m crawl.1 male swimmer trained was subjected consisting maximum voluntary contraction (MVC) Biceps Brachii (BB) Triceps (TB) for standardization.A protocol 4 x 50m with an interval...

In this article we describe a new wireless biosignal system which monitors in long-term basis, the users at their homes. The consists of wearable sensors that measure heart rate, blood oxygen saturation and physical activity levels, sending data to mobile phone from remote monitoring station located clinical facility. Whenever an abnormal situation occurs, alarm is triggered caregivers can provide assistance. has been deployed major Portuguese public hospital 30 patients under therapy have...

The materials described in this work result from the self-assembly of liquid crystals and ionic liquids into droplets, stabilized within a biopolymeric matrix. These systems are extremely versatile gels, terms composition, offer potential for fine tuning both structure function, as each individual component can be varied. Here, characterization application these gels sensing thin films gas sensor devices is presented. unique supramolecular explored molecular recognition volatile organic...

The need to develop systems electromyographic (EMG) in the aquatic environment, has led several researchers refine these instruments ensure credibility of data provided by EMG. aim this study is characterize behavior two muscle muscles involved crawl technique (biceps brachii and triceps brachii) over a test 200m crawl.

The pH-sensitive affinity pair composed by neutravidin and iminobiotin was used to develop a multilayered Magnetic Resonance Imaging (MRI) nanoprobe responsive the acidic pH of tumor microenvironment.