scholarly journals Drop Drying on the Sensor: One More Way for Comparative Analysis of Liquid Media

Sensors ◽  
2020 ◽  
Vol 20 (18) ◽  
pp. 5266
Author(s):  
Tatiana Yakhno ◽  
Alexander Pakhomov ◽  
Anatoly Sanin ◽  
Vyacheslav Kazakov ◽  
Ruben Ginoyan ◽  
...  
Keyword(s):  
Electrical Impedance ◽  
Liquid Drop ◽  
Solid Substrate ◽  
Alcoholic Beverages ◽  
Liquid Media ◽  
Sensor Device ◽  
Drop Drying ◽  
External Conditions ◽  
User Friendly ◽  
Reconstituted Milk

It is known that the processes of self-organization of the components of drying a liquid drop on a solid substrate are well reproduced under the same external conditions and are determined only by the composition and dispersion of the liquid. If the drop dries on the surface of the sensor device, these processes can be recorded and used as a passport characteristic of the liquid. The first half of the article is devoted to the description of the principles of the method and the proof of the validity of our assumptions. The second half of the article is devoted to the development of a user-friendly version of the device, where the change in the real and imaginary parts of the electrical impedance of the resonator was used as an informative parameter. The measure of the closeness of the relative positions of the hodographs of the compared samples on the complex plane is used as a criterion for the similarity-/-difference of various liquids. The design of a new sensor device and the results of its tests for distinguishing between different brands of alcoholic beverages and reconstituted milk of different concentrations are presented.

scholarly journals Future Trend in Wearable Electronics in the Textile Industry

2021 ◽  
Vol 11 (9) ◽  
pp. 3914
Author(s):  
Chi-Wai Kan ◽  
Yin-Ling Lam
Keyword(s):  
Human Brain ◽  
Textile Industry ◽  
Wearable Technology ◽  
User Acceptance ◽  
Future Trend ◽  
Wearable Electronics ◽  
External Conditions ◽  
Electronic Textile ◽  
User Friendly ◽  
Smart Wearable

Smart wearable textiles can sense, react, and adapt themselves to external conditions or stimuli, and they can be divided into active and passive smart wearable textiles, which can work with the human brain for cognition, reasoning, and activating capacity. Wearable technology is among the fastest growing parts of health, entertainment, and education. In the future, the development of wearable electronics will be focused on multifunctional, user-friendly, and user acceptance and comfort features and shall be based on advanced electronic textile systems.

Durable Biomolecular Assemblies for Protein-Powered Device Concepts

2009 ◽  
Author(s):  
Stephen A. Sarles ◽  
Donald J. Leo
Keyword(s):  
Lipid Bilayers ◽  
Electrical Impedance ◽  
Failure Modes ◽  
Solid Substrate ◽  
Electrical Impedance Spectroscopy ◽  
Closed Volume ◽  
Single Droplet ◽  
Direction Transverse ◽  
Droplet Movement ◽  
Mechanical Shaker

Physically encapsulated droplet-interface bilayers are formed by confining aqueous droplets surrounded by lipid mono-layers in connected compartments within a solid substrate. The droplets reside within each compartment and are positioned on fixed electrodes built into the solid substrate. Full encapsulation of the network is achieved with a solid cap that inserts into the substrate to form a closed volume. Encapsulated networks provide increased portability over unencapsulated networks by limiting droplet movement and by integrating the electrodes into the supporting fixture. The formation of encapsulated droplet-interface bilayers is confirmed with electrical impedance spectroscopy and cyclic voltammetry is also used to measure the effect of alamethicin proteins incorporated into the resulting lipid bilayers. The durability of the networks is quantified using a mechanical shaker to oscillate the bilayer in a direction transverse to the plane of the membrane and the results show that single droplet-interface bilayers can withstand several g’s of acceleration. Observed failure modes include both droplet separation and bilayer rupturing, where the geometry of the supporting substrate and the presence of electrodes are key contributors. Physically encapsulated DIBs can be shaken, moved, and inverted without bilayer failure, enabling the creation of portable, protein-powered devices.

MULTIPHASE MICRO-DROP INTERACTION IN INKJET PRINTING OF 3D STRUCTURES FOR TACTILE MAPS

2005 ◽  
Vol 19 (28n29) ◽  
pp. 1699-1702
Author(s):  
KAFEEL AHMED ◽  
DON McCALLUM ◽  
DEREK F. SHELDON
Keyword(s):  
Inkjet Printing ◽  
Liquid Drop ◽  
Solid Substrate ◽  
Light Emitting ◽  
Drop Coalescence ◽  
3D Objects ◽  
Ink Jet ◽  
Novel Method ◽  
Tactile Maps ◽  
And Control

Ink-jet technology is a novel method for rapid deposition of accurately measured material with high precision. Consequently it has been used for applications such as, deposition of light emitting polymers and more recently for fabricating 3D objects and micro-mechanical structures. Ink-jet technology is also being applied to produce tactile maps for the visually impaired. The efficiency of the tactile maps, as outlined by psychophysical and cartographic studies of haptics, depends on its 3D features. To comprehend and control these features, detailed understanding of interaction amongst micro-drops, which are typically 50μm in diameter, is imperative. Multiphase interaction takes place between each liquid drop at impact with liquid or solid cured drops (deposited previously) and the solid substrate in an envelop of air. The behavior of micro-drops with regards to surface tension, drop coalescence among liquid and solid drops, drop impact kinetics, wettability, surface energy and drop spread has been analyzed using a computational model.

A Practical Procedure for Measuring Contact Angles in Wettability Studies by the Sessile Drop Method

MRS Advances ◽  
2019 ◽  
Vol 4 (57-58) ◽  
pp. 3143-3152
Author(s):  
J. López-Cuevas ◽  
M.I. Pech-Canul ◽  
J.L. Rodríguez-Galicia ◽  
J.C. Rendón-Angeles
Keyword(s):  
Liquid Drop ◽  
Sessile Drop ◽  
Reactive Systems ◽  
Soda Lime ◽  
Solid Substrate ◽  
Contact Angles ◽  
Sessile Drop Method ◽  
Soda Lime Glass ◽  
Experimental Conditions ◽  
Drop Method

ABSTRACTAn old procedure used to carry out a graphical derivation of curves, which is based on the optical properties of plane mirrors, has been adapted for the measurement of the contact angle (θ) formed between a liquid drop and a flat solid substrate in wettability experiments carried out by the so-called “sessile drop” method. The method was tested for mercury on soda-lime glass at room temperature in air as well as for Cusil (Ag-28wt.%Cu) and Incusil-ABA (Ag-27wt.%Cu-12wt.%In-2wt.%Ti) brazing alloys on pressureless-sintered silicon carbide (PLS-SiC) at 850 °C, under a vacuum of 10-4/10-5 Torr. The proposed method is fast, simple and accurate enough from high (∼140°) to relatively low (∼10°) contact angles. Although the proposed method has been tested for metal-ceramic systems, it is of general application, so that it would be useful for any liquid-solid system. The method is applicable for any temperature, pressure and atmospheric experimental conditions employed, as well as for any chemical composition of liquid and solid. It is also useful for both low and high contact angles, as well as for reactive and non-reactive systems, as long as a photograph of a liquid drop resting on a flat solid surface is available for the studied system.

Effect of evaporation conditions on the spatial redistribution of components in an evaporating liquid drop on a horizontal solid substrate

2010 ◽  
Vol 55 (5) ◽  
pp. 636-644 ◽  
Author(s):  
Yu. Yu. Tarasevich ◽  
O. P. Isakova ◽  
V. V. Kondukhov ◽  
A. V. Savitskaya
Keyword(s):  
Liquid Drop ◽  
Solid Substrate ◽  
Spatial Redistribution

scholarly journals Use of artificial intelligence and neural networks for analysis and gesture detection in electrical impedance tomography

2020 ◽  
Vol 6 (3) ◽  
pp. 489-492
Author(s):  
Christian Gibas ◽  
Luca Mülln ◽  
Rainer Brück
Keyword(s):  
Neural Network ◽  
Artificial Intelligence ◽  
Neural Networks ◽  
Electrical Impedance Tomography ◽  
Electrical Impedance ◽  
Impedance Tomography ◽  
Precise Analysis ◽  
User Friendly ◽  
And Control

AbstractArtificial intelligence and neural networks are getting more and more relevant for several types of application. The field of prosthesis technology currently uses electromyography for controllable prosthesis. The precision of the control suffers from the use of EMG. More precise and more collected data with the help of EIT allows a much more precise analysis and control of the prosthesis. In this paper a neural network for gesture detection using EIT is developed and presented in a user-friendly way.

Electrical Impedance Tomography

2017 ◽  
pp. 130-152
Author(s):  
Ramesh Kumar Meena ◽  
Sarwan Kumar Pahuja ◽  
Abdullah Bin Queyam ◽  
Amit Sengupta
Keyword(s):  
Real Time ◽  
Electrical Impedance ◽  
Clinical Approach ◽  
Impedance Tomography ◽  
Cross Sectional ◽  
Non Invasive ◽  
Impedance Technique ◽  
Invasive Techniques ◽  
User Friendly ◽  
Mass Health

Presently, non-invasive techniques are in vogue and preferred standard clinical approach because of its limitless advantages in monitoring real time phenomenon occurring within our human body without much interference. Many techniques such as ultrasound, magnetocardiography, CT scan, MRI etc., are used for real time monitoring but are generally not recommended for continuous monitoring. The limitations created by above used techniques are overcome by a proposed technique called non-invasive bio-impedance technique such as Electrical Impedance Technique (EIT). EIT imaging technique is based on internal electrical conductivity distribution of the body. The reconstruction of cross sectional image of resistivity required sufficient data collection by finite element method using MATLAB software. The EIT technique offers some benefits over other imaging modalities. It is economical, non-invasive, user friendly and emits no radiation thus appears to be one of the best fit technology for mass health care to be used by the basic health worker at a community level.

Production of conidia by Phomopsis convolvulus

1990 ◽  
Vol 36 (2) ◽  
pp. 86-91 ◽  
Author(s):  
Louise Morin ◽  
Alan K. Watson ◽  
Richard D. Reeleder
Keyword(s):  
Sucrose Solution ◽  
Negative Relationship ◽  
Solid Substrate ◽  
Water Soluble ◽  
Liquid Media ◽  
Production Methods ◽  
The Media ◽  
Nitrogen Ratio ◽  
Barley Grains ◽  
Complex Liquid

Various solid-substrate fermentation and shake-flask liquid fermentation systems were investigated as spore production methods for Phomopsis convolvulus, a potential bioherbicide. Among them, "pot" barley grains and modified Richard's (V-8) liquid medium produced 5 × 108 conidia/g and 5 × 106 conidia/mL, respectively. Distinct pycnidia, covering the surface of pot barley grains, produced virulent conidia in a water-soluble mucilage approximately 10 days after seeding the substrate with conidia. In complex liquid media, conidia were produced in pycnidia 3 to 4 days after seeding the media with mature pycnidia or conidia. A negative relationship was demonstrated between inoculum density and yield of conidia in modified Richard's (V-8) liquid culture. Omission of V-8 juice or decrease of the carbon to nitrogen ratio in modified Richard's (V-8) medium inhibited sporulation. Conidia lost viability after 30 days when held at −10 °C in a sucrose solution, but conidia stored at −70 °C remained viable and pathogenic for at least 6 months. Key words: Phomopsis convolvulus, bioherbicide, sporulation.

scholarly journals Highlighting the Role of Dielectric Thickness and Surface Topography on Electrospreading Dynamics

Micromachines ◽  
2019 ◽  
Vol 10 (2) ◽  
pp. 93 ◽  
Author(s):  
Nikolaos Chamakos ◽  
Dionysios Sema ◽  
Athanasios Papathanasiou
Keyword(s):  
Electric Field ◽  
Surface Topography ◽  
Solid Surface ◽  
Electric Field Distribution ◽  
Liquid Drop ◽  
Solid Substrate ◽  
Dielectric Thickness ◽  
Fundamental Interest ◽  
Spreading Dynamics

The electrospreading behavior of a liquid drop on a solid surface is of fundamental interest in many technological processes. Here we study the effect of the solid topography as well as the dielectric thickness on the dynamics of electrostatically-induced spreading by performing experiments and simulations. In particular, we use an efficient continuum-level modeling approach which accounts for the solid substrate and the electric field distribution coupled with the liquid interfacial shape. Although spreading dynamics depend on the solid surface topography, when voltage is applied electrospreading is independent of the geometric details of the substrate but highly depends on the solid dielectric thickness. In particular, electrospreading dynamics are accelerated with thicker dielectrics. The latter comes to be added to our recent work by Kavousanakis et al., Langmuir, 2018, which also highlights the key role of the dielectric thickness on electrowetting-related phenomena.

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