Wearable (bio)chemical sensors for applications in sport physiology

Nosivi bežični kemijski senzori omogućavaju neinvazivnu i kontinuiranu analizu uzoraka, što nije moguće postići klasičnim analitičkim metodama i instrumentima. U ovom radu predstavljena su mjerenja provedena kako bi se ustanovio princip djelovanja te mogućnost primjene novog nosivog optičkog senzora u fiziologiji sporta. Kolorimetrijska karakterizacija pH osjetljivog bojila (2-fluoro-4-[4-(2-hidroksietansulfonil)-fenilazo]-6-metoksifenol (GJM-492) imobiliziranog na tekstilu od poliestera, provedena je kako bi se odredila njegova primjenjivost za određivanje pH znoja. Senzor je zasnovan na RFID tehnologiji bežične komunikacije, te bi se ovakva vrsta senzora mogla primjenjivati kao nosivi bežični optički pH kemijski senzor u svrhu poboljšanja učinka sportaša.Wearable wireless chemical sensors allow non-invasive and continuous analysis of samples, which can otherwise not be achieved by conventional analytical methods and instruments. In this work measurments conducted in order to establish the principle of operation and possibility of application of a novel type of wearable optical chemical sensor in sport physiology are presented. Colourimetric characterisation of pH sensitive dye 2-fluoro-4-[4-(2-hydroxyethanesulfonyl)-phenylazo]-6-methoxyphenol (GJM-492) immobilized on a polyester fabric was conducted in order to determine its applicability for sweat pH monitoring. The wireless sensor is based on RFID technology of wireless communication, and this type of sensor could therefore be used as wearable wireless optical pH sensor in order to improve athletes' performance

Wearable (bio)chemical sensors for applications in sport physiology

Nosivi bežični kemijski senzori omogućavaju neinvazivnu i kontinuiranu analizu uzoraka, što nije moguće postići klasičnim analitičkim metodama i instrumentima. U ovom radu predstavljena su mjerenja provedena kako bi se ustanovio princip djelovanja te mogućnost primjene novog nosivog optičkog senzora u fiziologiji sporta. Kolorimetrijska karakterizacija pH osjetljivog bojila (2-fluoro-4-[4-(2-hidroksietansulfonil)-fenilazo]-6-metoksifenol (GJM-492) imobiliziranog na tekstilu od poliestera, provedena je kako bi se odredila njegova primjenjivost za određivanje pH znoja. Senzor je zasnovan na RFID tehnologiji bežične komunikacije, te bi se ovakva vrsta senzora mogla primjenjivati kao nosivi bežični optički pH kemijski senzor u svrhu poboljšanja učinka sportaša.Wearable wireless chemical sensors allow non-invasive and continuous analysis of samples, which can otherwise not be achieved by conventional analytical methods and instruments. In this work measurments conducted in order to establish the principle of operation and possibility of application of a novel type of wearable optical chemical sensor in sport physiology are presented. Colourimetric characterisation of pH sensitive dye 2-fluoro-4-[4-(2-hydroxyethanesulfonyl)-phenylazo]-6-methoxyphenol (GJM-492) immobilized on a polyester fabric was conducted in order to determine its applicability for sweat pH monitoring. The wireless sensor is based on RFID technology of wireless communication, and this type of sensor could therefore be used as wearable wireless optical pH sensor in order to improve athletes' performance

How successful we are in recognizing anorectic symptoms? : psychological and physical longitudinal follow - up of patients with anorexia nervosa

Longitudinalnim smo praćenjem obuhvatili 12 pacjentica oboljelih od anoreksije nervoze s ciljem evaluacije postupaka dijagnostike i liječenja. Prateći promjene u dijagnostičkim kriterijima (Dijagnostički i statistički priručnik duševnih bolesti · DSM IV) uočili smo da je u naših pacijentica najprije došlo do oporavka na planu fizičkih kriterija bolesti (povećanje težine i pojava menstruacije), ali da psihički kriteriji (strah od debljanja i poremećaj percepcije vlastita tijela) perzistiraju znatno duže. Anoreksija nervoza izrazito je dugotrajna bolest s tendencijom ka kroničnosti. Liječenje treba nastaviti i nakon tjelesnog oporavka (tjelesna teæina, menstruacija). Budući da smo našli i dosljedno predugo vrijeme (prosječno 14 mjeseci) od pojave prvih simptoma bolesti do pronalaženja dijagnoze, ističemo važnost ranog otkrivanja i dugotrajnog tretmana ove bolesti.Twelve patients with diagnosis anorexia nervosa have been prospectively follow-up with respect to evaluated the treatment regarding differences in diagnostic criteria (Diagnostic and statistical manual of mental diseases · DSM IV), academic, family and social functioning. Anorexia nervosa is a long treating disease with tendency toward chronicity. We recommend that treatment must go on after improvement in physical symptoms (body weight, period) because psychological criteria of illness (fear of becoming fat and disturbance in perception of own body) still persist. We found that the time from first signs of disease until the clear diagnose was to long (mean time is 14 months). We point out the importance of early diagnose and long-term treatment

How successful we are in recognizing anorectic symptoms? : psychological and physical longitudinal follow - up of patients with anorexia nervosa

Longitudinalnim smo praćenjem obuhvatili 12 pacjentica oboljelih od anoreksije nervoze s ciljem evaluacije postupaka dijagnostike i liječenja. Prateći promjene u dijagnostičkim kriterijima (Dijagnostički i statistički priručnik duševnih bolesti · DSM IV) uočili smo da je u naših pacijentica najprije došlo do oporavka na planu fizičkih kriterija bolesti (povećanje težine i pojava menstruacije), ali da psihički kriteriji (strah od debljanja i poremećaj percepcije vlastita tijela) perzistiraju znatno duže. Anoreksija nervoza izrazito je dugotrajna bolest s tendencijom ka kroničnosti. Liječenje treba nastaviti i nakon tjelesnog oporavka (tjelesna teæina, menstruacija). Budući da smo našli i dosljedno predugo vrijeme (prosječno 14 mjeseci) od pojave prvih simptoma bolesti do pronalaženja dijagnoze, ističemo važnost ranog otkrivanja i dugotrajnog tretmana ove bolesti.Twelve patients with diagnosis anorexia nervosa have been prospectively follow-up with respect to evaluated the treatment regarding differences in diagnostic criteria (Diagnostic and statistical manual of mental diseases · DSM IV), academic, family and social functioning. Anorexia nervosa is a long treating disease with tendency toward chronicity. We recommend that treatment must go on after improvement in physical symptoms (body weight, period) because psychological criteria of illness (fear of becoming fat and disturbance in perception of own body) still persist. We found that the time from first signs of disease until the clear diagnose was to long (mean time is 14 months). We point out the importance of early diagnose and long-term treatment

Wearable (bio)chemical sensors for applications in sport physiology

Nosivi bežični kemijski senzori omogućavaju neinvazivnu i kontinuiranu analizu uzoraka, što nije moguće postići klasičnim analitičkim metodama i instrumentima. U ovom radu predstavljena su mjerenja provedena kako bi se ustanovio princip djelovanja te mogućnost primjene novog nosivog optičkog senzora u fiziologiji sporta. Kolorimetrijska karakterizacija pH osjetljivog bojila (2-fluoro-4-[4-(2-hidroksietansulfonil)-fenilazo]-6-metoksifenol (GJM-492) imobiliziranog na tekstilu od poliestera, provedena je kako bi se odredila njegova primjenjivost za određivanje pH znoja. Senzor je zasnovan na RFID tehnologiji bežične komunikacije, te bi se ovakva vrsta senzora mogla primjenjivati kao nosivi bežični optički pH kemijski senzor u svrhu poboljšanja učinka sportaša.Wearable wireless chemical sensors allow non-invasive and continuous analysis of samples, which can otherwise not be achieved by conventional analytical methods and instruments. In this work measurments conducted in order to establish the principle of operation and possibility of application of a novel type of wearable optical chemical sensor in sport physiology are presented. Colourimetric characterisation of pH sensitive dye 2-fluoro-4-[4-(2-hydroxyethanesulfonyl)-phenylazo]-6-methoxyphenol (GJM-492) immobilized on a polyester fabric was conducted in order to determine its applicability for sweat pH monitoring. The wireless sensor is based on RFID technology of wireless communication, and this type of sensor could therefore be used as wearable wireless optical pH sensor in order to improve athletes' performance

Effect of Pre-emptive Paracetamol Infusion on Postoperative Analgesic Consumption in Children Undergoing Elective Herniorrhaphy

OBJECTIVE: Studies have suggested that pre-emptive analgesia may decrease postoperative pain and opioid consumption. This study was undertaken to determine whether pre-emptive analgesia reduces postoperative pain and total paracetamol and opioid consumption in children undergoing herniorrhaphy. METHODS: In this retrospective study, medical records were analysed before and after the pre-emptive analgesia regimen was introduced. Demographic data, perioperative drug consumption and discharge time were recorded. In the first group, no pre-emptive analgesia (NA; year, 2011; n=60) was given and in the second group, the pre-emptive analgesia (PA) paracetamol 10-15 mg kg-1 was given intravenously in the surgical ward at least 1 h before the surgical procedure (year 2013; n=60). Postoperative pain determining supplemental pain medications was scored using a Faces Pain Scale or visual analogue scale. Total paracetamol and opioid consumption during 24 perioperative hours was registered for all patients. The statistical analysis was performed using t test and Chi-square test. RESULTS: The mean age of children was 69.6±49.9 and 58.7±32.4 months (p=0.157), and the mean body mass index (BMI) was 18.3±8.8 kg m-2 and 16.4±3.7 kg m-2 (p=0.125) in the NA and PA groups, respectively. Total paracetamol consumption was 1157.8±908.8 mg vs. 983.0±536.4 mg (p=0.202), and the total opioid consumption was 5.8±4.7 in the NA group and 7.0±4.6 morphine equivalents in the PA group (p=0.160). No differences in the discharge time between the groups were observed (2.1±0.3 vs. 2.0±0.3 days, p=0.13). CONCLUSION: PA was proven to be efficient in the terms of postoperative pain control but did not reduce the overall analgesic drug consumption in the children undergoing elective herniorrhaphy. Multimodal pain treatment may decrease the consumption of analgesic drugs

Fast formation of anode-free Li-metal batteries by pulsed current

Anode-free Li-metal batteries offer high energy density but are prone to dendrite formation during charging which can cause catastrophic failures. Ensuring dendrite-free smooth Li deposits during charging is therefore necessary. Suppressing dendrite growth can be achieved by pulsed current charging, especially during the formation cycle that largely determines the corrosion trajectory of a cell. As opposed to the constant-current technique, pulsed current techniques apply intermittently stopped current flows. This work investigates the electroplating of metallic Li onto a Cu foil current collector under constant-current and pulsed current formation protocols. In addition to smoother, less resistive electroplated metallic Li deposits and increased Coulombic efficiency, we show that by employing an optimized pulsed current formation protocol, the formation process is accelerated by a factor of 2 compared to a C/20 protocol. Finally, by employing a simple regression coupled to experimentation, we propose the pseudo-IR-drop to be used for live adjustment of pulsed current protocols i.e., individually approach each cell at all SOC during formation

Electrodeposition of bismuth telluride from a weakly coordinating, non-aqueous solution

We report the electrodeposition of bismuth telluride thin films on to titanium nitride (TiN) electrodes from a weakly coordinating solvent, dichloromethane (CH2Cl2), using the halometallates, [NnBu4][BiCl4] and [NnBu4]2[TeCl6] with 0.1 M [NnBu4]Cl as the supporting electrolyte. The elemental composition of the electrodeposited films was found to be independent of the deposition potential between −0.6 and −2.0 V vs. Ag/AgCl but to be dependent on ratio of the concentrations of the Bi and Te precursors in the solution, with the amount of bismuth in the films increasing when the concentration of [NnBu4][BiCl4] in solution was increased. All the electrodeposited films were found to be homogenous in composition across the electrode surface and to be reproducible in composition for replicate experiments. As the deposition potential was taken less negative, the morphology of the deposits changed from uniform films to films with a compact micro/nano particle structure as seen by scanning electron microscopy (SEM). Using this system, the electrodeposition of crystalline Bi2Te3 and Bi4Te3 was confirmed by energy dispersive spectroscopy (EDX) and grazing incidence X-ray diffraction

Film before aggregates : an operando GISAXS study on electrochemically assisted surfactant assembly

The process of electrochemically assisted surfactant assembly was followed in real time by grazing incidence small angle X-ray scattering with the aim to deconvolute the formation of mesoporous silica film and unwanted porous particles. The X-ray technique proved to be useful for the characterisation of this process, as it takes place at a very dynamic, solid/liquid interface. This paper shows the electrochemically driven onset and evolution of silica/surfactant structures. Additional control experiments indicate the formation of vertically aligned structures without the use of an electric field, although it seems to be beneficial for increased pore ordering