Search results for "SENSORS"
showing 10 items of 343 documents
De l’ingénierie de protéines de liaison aux odorants à la détection électrochimique de molécules volatiles vers la conception de biocapteurs et nez é…
2014
The detection of odorant molecules has become an important challenge in different research area, such as the food industry, medical diagnostics and homeland security. Indeed, the thousands of odorants in our environment provide information on their chemical nature or their concentration. Human olfactory system is capable of discriminating thousands of different molecules thanks to biochemical mechanisms involving multiple protein receptor partners and a combinatorial coding. These biomolecules that include olfactory receptors and odorant-binding proteins (OBP) represent an interesting source of detectors for the design of biosensors. OBPs are small soluble proteins present in nasal mucus at…
Influence of PDA Coating on the Structural, Optical and Surface Properties of ZnO Nanostructures
2020
Polydopamine (PDA) is a new biocompatible material, which has prospects in biomedical and sensor applications. Due to functional groups, it can host wide range of biomolecules. ZnO nanostructures are well known templates for optical sensors and biosensors. The combination of ZnO and PDA results in a change of optical properties of ZnO&ndash
FRET fluorescento proteīnu balstītu pH sensoru izveide
2018
Iekššūnas vides pH ir būtisks parametrs, kas raksturo šūnā notiekošos procesus, kā arī šūnas vitalitāti. Fluorescento proteīnu pielietošana pH noteikšanai ir daudzsološa metode. Pieejami atšķirīgas pH jutības fluorescentie proteīni, tie neuzrāda augstu toksicitāti un invazivitāti, padarot tos piemērotus dzīvu šūnu pētījumiem. Maģistra darba mērķis bija izveidot fluorescento proteīnu saturošus konstruktus ar atšķirīgu pH jutības slieksni, izmantojot Aquamarine, ECFP, EYFP un Citrine fluorescentos proteīnus, kas darbosies kā pH sensoru sistēma dzīvās šūnās, izmantojot FRET metodi. Trīs konstrukciju izveide (pAqua-HL3-Citrine, pAqua-HL3-EYFP, pECFP-HL3-EYFP) veikta ar dažādām metodiskajām piee…
Emotions and Activity Recognition System Using Wearable Device Sensors
2021
Nowadays machines have become extremely smart, there are a lot of existing services that seemed to be unexpectable and futuristic decades or even a few years ago. However, artificial intelligence is still far from human intelligence, machines do not have feelings, consciousness, and intuition. How can we help machines to learn about human feelings and understand their needs better? People take their devices wherever they go, what can devices tell us about their owners? Personal preferences and needs are dependent on emotional and situational contexts. Therefore, emotional and activity aware gadgets would be more intuitive and provide more appropriate information to users. Contemporary weara…
Amperometric Biosensor and Front-End Electronics for Remote Glucose Monitoring by Crosslinked PEDOT-Glucose Oxidase
2018
Focusing on the interplay between interface chemistry, electrochemistry, and integrated electronics, we show a novel low-cost and flexible biosensing platform for continuous glucose monitoring. The amperometric biosensing system features a planar three-electrode structure on a plastic substrate, and a wireless near-field communication-powered electronic system performing sensor analog front-end, A/D conversion, digital control, and display tasks. The working electrode is made of electropolymerized poly (3,4-ethylenedioxythiophene) film onto a polyethylene terephthalate/gold electrode followed by immobilization of cross-linked glucose oxidase by glutaraldehyde. The advantages offered by such…
A Statistical Approach for A-Posteriori Deployment of Microclimate Sensors in Museums: A Case Study
2022
[EN] The deployment of sensors is the first issue encountered when microclimate monitoring is planned in spaces devoted to the conservation of artworks. Sometimes, the first decision regarding the position of sensors may not be suitable for characterising the microclimate close to climate sensitive artworks or should be revised in light of new circumstances. This paper fits into this context by proposing a rational approach for a posteriori deployment of microclimate sensors in museums where long-term temperature and relative humidity observations were available (here, the Rosenborg Castle, Copenhagen, Denmark). Different statistical tools such as box-and-whisker plots, principal component …
Drug Screening by Inkjet Printing Microarrays
2010
Optisks čukstošās galerijas modu mikrorezonatora mitruma sensors
2020
Šajā bakalaura darbā tiek pētīti čukstošās galerijas modu (ČGM) mikrorezonatori un to pielietojums gaisa mitruma kontrolei un mērīšanai. ČGM rodas, kad gludas virsmas optiskajos dobumos notiek konstruktīva interference. Rezultātā rezonatorā paliek tikai noteikti viļņu garumi, kas atkarīgi no rezonatora izmēra un laušanas koeficienta. Līdz ar to, ja kāds no šiem parametriem gaisa mitruma izmaiņu dēļ mainās, rezonatoru var izmantot kā mitruma sensoru. Eksperimentam izvēlēts glicerīna piliens, kurā ČGM rezonanses ierosinātas ar skenējamu pusvadītāju lāzeru. Izveidota eksperimentāla iekārta, ar kuru var pētīt šāda veida mitruma sensoru. Rezultātā iegūta jutība vidēji 4,14 nm/% RH lāzera viļņa g…
A novel device for assessing the health risk caused by hand-arm vibrations in olives harvesting
2012
The mechanization of olive harvesting is very important both to reduce the costs of production and to assure the oil quality because the manual harvest does not allow to operate at the right time and also need a long period to be completed. The use of portable shakers, that are spreading more than others typologies, can give a solution to the problem. However, the use of such equipment may involve risk of exposure to hand-transmitted vibration. The aim of this study was to assess the level of exposure to hand-arm vibration of the operators using portable shakers (reference standards UNI EN ISO 5349-1:2004, Italian Low Decree 81/2008). The research presented here concerns the definition of a…
Alvas oksīda (SnO2) elektroķīmiskā gāzu sensora aprobācija smaku monitoringam ārtelpu gaisa vidē
2017
Maģistra darbā pētītas un analizētas smaku piesārņojuma koncentrācijas noteikšanas iespējas, izmantojot alvas oksīda elektroķīmiskos gāzu sensorus Figaro TGS: 2600; 2602; 2603; 2620. Darba izstrādes gaitā izstrādāts sensora kalibrācijas algoritms toluolam, benzolam un etanolam un novērtēta 4 dažādu sensoru spēja reaģēt dažādos piesārņotības līmeņa lauka apstākļos (mēslota un pūstošu kāpostu lauka, bijušās lopkautuves – esošā cūkkopības uzņēmuma tuvumā, Rīgas Brīvostas uzņēmumu apkārtnē un piena pārstrādes uzņēmuma notekūdeņu attīrīšanas iekārtu tuvumā). Darbā ir apzināts iepriekšminēto gāzu sensoru potenciāls un izvērtētas iespējas veikt vielu kvantitatīvu analīzi.