Stable Bioelectric Signal Acquisition Using an Enlarged Surface-Area Flexible Skin Electrode

2021 ◽  
Author(s):  
Inyeol Yun ◽  
Jinpyeo Jeung ◽  
Hyungsub Lim ◽  
Jieun Kang ◽  
Sangyeop Lee ◽  
...  
Keyword(s):  
Surface Area ◽  
Signal Acquisition ◽  
Skin Electrode ◽  
Flexible Skin ◽  
Bioelectric Signal

Monitoring the level of infection by COVID-19: an previous experiment to possibility of future application to the C-reactive protein detection by bioelectric signals

2020 ◽  
pp. 104-122
Author(s):  
Henrique Stelzer Nogueira ◽  
DMSD Duque ◽  
Vagner de Mendonça ◽  
Wladecir Lima ◽  
Eduardo Bock
Keyword(s):  
Data Transfer ◽  
Previous Experiment ◽  
Protein Detection ◽  
Future Application ◽  
Signal Acquisition ◽  
C Reactive Protein ◽  
Infection Level ◽  
Reactive Protein ◽  
Bioelectric Signal ◽  
Bioelectric Signals

C-reactive protein (CRP) is a marker of inflammation and infection, and is altered in COVID-19 patients. 2-methacryloyloxyetyl phosphorylcholine (MPC) is a polymer containing phosphorylcholine, a protein that anchors CRP. The purpose of this work was to detect CRP by bioelectric signal resulting from its interaction with MPC. The signal acquisition system was elaborated using Arduino in conjunction with the Parallax Data Acquisition (PLX-DAQ) program for data transfer to Excel, which allowed the treatment of the obtained signal. 10 volunteers were also enrolled to provide blood samples for the purpose of using CRP on confectioned biomaterial containing MPC. After pipetting the volunteer's blood serum into the biomaterial containing MPC, it was possible to obtain a bioelectric signals from the interaction of MPC with CRP. It is concluded that it is possible to detect the presence of CRP by bioelectric signal, and that the use of MPC is promising for future application in collection strips, which would allow the quantification of CRP by portable electronic equipment. An application example would be monitoring the infection level of patients with COVID-19.

scholarly journals THE IMPLEMENTATION OF THE HUMAN COMPUTER INTERACTION SYSTEM BASED ON BIOELECTRICITY

2021 ◽  
Vol 6 (2) ◽  
Author(s):  
Sharda Shalikrao Kakde ◽  
Dr. Bashirahamad F Momin
Keyword(s):  
Human Computer Interaction ◽  
Concentration Level ◽  
Signal Transmission ◽  
Signal Acquisition ◽  
Bioelectric Signal ◽  
Medical Sector ◽  
System User ◽  
Bioelectric Signals ◽  
Electroencephalogram Eeg ◽  
Computer Interaction

The electroencephalogram (EEG) evaluates brain waves, whereas the electrooculogram (EOG) evaluates blinking eye signals. To use bioelectric signals in bio-metric and clinical applications, preprocessing of the signal needs to be done. Signals are used to transmit data in nearly every sector of life including technology, manufacturing, and electronics, etc. Nowadays HCI is based on bioelectric signal has got loads of demand. Almost every sector bioelectrical signals are used especially in the medical sector and researches. In this paper, two bioelectric signals are used that is EEG, EOG. Two HCI (Human-Computer Interaction) systems were designed which is based on two kinds of bioelectric signals is EOG and EEG. The signal is transmitted by wireless mode only because in a wired HCI System user is not comfortable. Here HCI system contains three sections first is signal acquisition and signal transmission module second is EOG and EEG handling module and the last one is function implementing modular. This paper deals with the concentration level and meditation level of a person which is very useful in sports and other researches.

Preparation and characterisation of vanadium pentoxide supported rhodium catalyst

1988 ◽  
Vol 46 ◽  
pp. 946-947
Author(s):  
A. Legrouri
Keyword(s):  
Aqueous Solution ◽  
Thermal Decomposition ◽  
Physicochemical Properties ◽  
Surface Area ◽  
Vanadium Pentoxide ◽  
High Purity ◽  
Gas Adsorption ◽  
Rhodium Catalyst ◽  
Optical Methods ◽  
Reducible Oxides

The industrial importance of metal catalysts supported on reducible oxides has stimulated considerable interest during the last few years. This presentation reports on the study of the physicochemical properties of metallic rhodium supported on vanadium pentoxide (Rh/V2O5). Electron optical methods, in conjunction with other techniques, were used to characterise the catalyst before its use in the hydrogenolysis of butane; a reaction for which Rh metal is known to be among the most active catalysts.V2O5 powder was prepared by thermal decomposition of high purity ammonium metavanadate in air at 400 °C for 2 hours. Previous studies of the microstructure of this compound, by HREM, SEM and gas adsorption, showed it to be non— porous with a very low surface area of 6m2/g3. The metal loading of the catalyst used was lwt%Rh on V2Q5. It was prepared by wet impregnating the support with an aqueous solution of RhCI3.3H2O.

Cell morphology, volume, and surface area determinations from multilevel contouring within HVEM micrographs of serial sections and whole-cell mounts

1987 ◽  
Vol 45 ◽  
pp. 588-589
Author(s):  
M. Marko ◽  
A. Leith ◽  
D. Parsons
Keyword(s):  
Surface Area ◽  
Electron Micrographs ◽  
Cell Morphology ◽  
Individual Variation ◽  
Serial Section ◽  
Stereo Pair ◽  
Complex Structures ◽  
Serial Sections ◽  
Surface Areas ◽  
Computer Based

The use of serial sections and computer-based 3-D reconstruction techniques affords an opportunity not only to visualize the shape and distribution of the structures being studied, but also to determine their volumes and surface areas. Up until now, this has been done using serial ultrathin sections.The serial-section approach differs from the stereo logical methods of Weibel in that it is based on the Information from a set of single, complete cells (or organelles) rather than on a random 2-dimensional sampling of a population of cells. Because of this, it can more easily provide absolute values of volume and surface area, especially for highly-complex structures. It also allows study of individual variation among the cells, and study of structures which occur only infrequently.We have developed a system for 3-D reconstruction of objects from stereo-pair electron micrographs of thick specimens.

Risk Factors for Bleeding during Treatment of Acute Venous Thromboembolism

1996 ◽  
Vol 76 (05) ◽  
pp. 682-688 ◽  
Author(s):  
Jos P J Wester ◽  
Harold W de Valk ◽  
Karel H Nieuwenhuis ◽  
Catherine B Brouwer ◽  
Yolanda van der Graaf ◽  
...  
Keyword(s):  
Risk Factors ◽  
Venous Thromboembolism ◽  
Surface Area ◽  
Body Surface Area ◽  
Body Surface ◽  
Small Body ◽  
Bleeding Risk ◽  
Risk Scores ◽  
Risk Of Bleeding ◽  
Acute Venous Thromboembolism

Summary Objective: Identification of risk factors for bleeding and prospective evaluation of two bleeding risk scores in the treatment of acute venous thromboembolism. Design: Secondary analysis of a prospective, randomized, assessor-blind, multicenter clinical trial. Setting: One university and 2 regional teaching hospitals. Patients: 188 patients treated with heparin or danaparoid for acute venous thromboembolism. Measurements: The presenting clinical features, the doses of the drugs, and the anticoagulant responses were analyzed using univariate and multivariate logistic regression analysis in order to evaluate prognostic factors for bleeding. In addition, the recently developed Utrecht bleeding risk score and Landefeld bleeding risk index were evaluated prospectively. Results: Major bleeding occurred in 4 patients (2.1%) and minor bleeding in 101 patients (53.7%). For all (major and minor combined) bleeding, body surface area ≤2 m2 (odds ratio 2.3, 95% Cl 1.2-4.4; p = 0.01), and malignancy (odds ratio 2.4, 95% Cl 1.1-4.9; p = 0.02) were confirmed to be independent risk factors. An increased treatment-related risk of bleeding was observed in patients treated with high doses of heparin, independent of the concomitant activated partial thromboplastin time ratios. Both bleeding risk scores had low diagnostic value for bleeding in this sample of mainly minor bleeders. Conclusions: A small body surface area and malignancy were associated with a higher frequency of bleeding. The bleeding risk scores merely offer the clinician a general estimation of the risk of bleeding. In patients with a small body surface area or in patients with malignancy, it may be of interest to study whether limited dose reduction of the anticoagulant drug may cause less bleeding without affecting efficacy.

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