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•Krieselite was synthesized at 600 °C and 100 MPa by hydrothermal method.•Single crystal structure was refined by XRD.•The assignment of Ag bands in non-polarized Raman spectra was ...carried out.•Lattice dynamic calculations agree with experimental Raman data.•Krieselite Raman spectra are obtained as function of pressure up to 30 GPa.
Spontaneous crystals of krieselite (Ge analogue of topaz) with the chemical formula Al2(Ge0.75Si0.25)O4(F1.63OH0.37) were synthesized using a thermo-gradient hydrothermal method at a temperature of 600/650 °C and pressure of 100 MPa. The unit cell parameters are: a = 8.9732(8) Å, b = 8.4823(7) Å, c = 4.7379(5) Å, V = 360.62(6) Å3, space group Pnma. The F-/OH– content of the samples was refined by FTIR spectroscopy method. Raman spectroscopy showed the main differences between the spectra of krieselite and topaz at the ambient conditions. The assignment of observed and calculated Ag bands (cm−1) for non-polarized Raman spectra was carried out. Using in situ Raman spectroscopy at high pressures, the dependence of the shift in the position of the main bands of the krieselite Raman spectrum on the pressure was established, and the corresponding paths of pressure induced distortion of crystal structure was assumed. According to the data of Raman spectroscopy, it was revealed that krieselite does not undergo the phase transitions up to 30 GPa. The probable way of crystal structure distortion within the space group Pnma was proposed based on simulation of high-pressure Raman spectra.
Abstract Objective In the SAVE-trial we evaluated the safety, reliability and improvements of patient management using the BIOTRONIK Home Monitoring®-System (HM) in pacemaker (PM) and implanted ...cardioverter defibrillator (ICD) patients. Design 115 PM (Module A) and 36 ICD-patients (Module B) were recruited 3 months after implantation. Patients 65 patients in Module A were randomised to HM-OFF and had one scheduled outpatient clinic follow-up (FU) per year, whereas patients randomised to HM-ON were equipped with the mobile transmitter and discharged without any further scheduled in-office FU. In Module B 18 patients were randomised to HM-OFF and followed by standard outpatient clinic controls every 6 months; 18 patients were randomised to HM-ON receiving remote monitoring plus one outpatient clinic visit per year; unscheduled follow-ups were performed when necessary. Results The average follow-up period was 17.1 ± 9.2 months in Module A and 26.3 ± 8.6 months in Module B. In both modules, the number of FUs per year was significantly reduced (Module A HM-ON 0.29 ± 0.6 FUs/year vs HM-OFF 0.53 ± 0.5 FUs/year; p < 0.001; Module B HM-ON 0.87 ± 0.25 vs HM-OFF 1.73 ± 0.53 FU/year, p < 0.001). Cost analysis was significantly lower in the HM-ON group compared to the HM-OFF group (18.0 ± 41.3 and 22.4 ± 26.9€ respectively; p < 0.003). 93% of the unscheduled visits in Module B were clinically indicated, whereas 55% of the routine FUs were classified as clinically unnecessary. Conclusion Remote home monitoring of pacemaker and ICD devices was safe, reduced overall hospital visits, and detected events that mandated unscheduled visits.
We compared the effects of resistance training (ResisT) to pyramidal and traditional weightlifting sets on men’s psychophysiological responses. In a randomized crossover design, 24 resistance-trained ...males performed drop-set, descending pyramid, and traditional ResisT in the barbell back squat, 45° leg press, and seated knee extension. We assessed participants’ rating of perceived exertion (RPE) and feelings of pleasure/displeasure (FPD) at the end of each set and at 10, 15, 20, and 30 minutes post-session. No differences were detected across ResisT Methods in total training volume (p = 0.180). Post hoc comparisons revealed that drop-set training elicited higher RPE (M 8.8 SD 0.7 arbitrary units) and lower FPD (M −1.4 SD 1.5 arbitrary units) values compared to descending pyramid (M Set RPE 8.0 SD 0.9 arbitrary units and M Set FPD 0.4 SD 1.6 arbitrary units) and traditional set (M Set RPE 7.5 SD 1.1 arbitrary units and M Set FPD 1.3 SD 1.2 arbitrary units) schemes (p < 0.05). In addition, drop-set training elicited higher session RPE (M 8.1 SD 0.8 arbitrary units) and lower session FPD (M 0.2 SD 1.4 arbitrary units) values than descending pyramid and traditional ResisT (p < 0.001). Similarly, descending pyramid training elicited higher session RPE (M 6.6 SD 0.9 arbitrary units) and lower session FPD (M 1.2 SD 1.4 arbitrary units) than traditional set (M Session RPE 5.9 SD 0.8 arbitrary units and M Session FPD 1.5 SD 1.2 arbitrary units) training (p = 0.015). No differences were found in the temporality of post-session metrics, suggesting that testing 10 and 15 minutes post-ResisT was sufficient to assess session RPE (p = 0.480) and session FPD (p = 0.855), respectively. In conclusion, even with similar total training volume, drop-set training elicited more pronounced psychophysiological responses than either pyramidal or traditional ResisT in resistance-trained males.
An aqueous two-phase system formed from polyethylene glycol and dextran was used to uniformly coat the bottom surfaces of the wells of standard 96-well assay plates with capture and detection ...antibodies to improve the performance and cost-effectiveness of sandwich enzyme-linked immunosorbent assay (ELISA). Using this approach, limits of detection and linear dynamic range values comparable to those obtained for conventional sandwich ELISA were obtained using considerably lower antibody quantities due to the much lower reagent volumes required when antibodies are applied in a dextran solution beneath a polyethylene glycol overlay. Confinement of the antibody reagents to the bottom surfaces of the wells within the dextran phase also dramatically decreased the optical crosstalk present between neighboring wells when using transparent microplates. Adaptation of the conventional single sandwich ELISA for aqueous two-phase system antibody confinement was demonstrated by analysis of standard curves for C-reactive protein, transforming growth factor beta 1, and the chemokine CXCL10.
An aqueous two-phase system was used to reduce reagent volumes and optical crosstalk for a low-cost single sandwich enzyme-linked immunoassay.
Acute compartment syndrome is a critical condition, most commonly arising as the result of high-energy trauma, fracture, and crush injury. Early diagnosis and treatment are imperative to avoid ...permanent functional damage to the affected extremity. Although isolated pedal compartment syndrome is well studied in adults, in the pediatric population, it has been seldom reported. Pediatric patients pose a unique challenge when diagnosing compartment syndrome. Their inability to appropriately verbalize symptoms and participate in physical examinations often causes a delay in diagnosis. We present the case of a 5-year-old female who developed compartment syndrome of her left foot 26 hours after sustaining an isolated crush injury to the distal forefoot. Her treatment included emergent fasciotomy in combination with 20 hyperbaric oxygen therapy treatments. The progression of her acute digital ischemia was monitored by using serial fluorescence microangiography studies performed at 17 hours, 7 days, and 3 weeks postinjury. Throughout these serial studies, improvement in hypofluorescence was noted involving the dorsolateral midfoot, as well as digits 3, 4, and 5, which correlated with physical examination. The patient went on to uneventfully autoamputate the distal aspects of digits 4 and 5 within 4 months of injury. At the 12-month follow-up visit, she denied any pain, sensory deficits, or functional disability and had returned to all preinjury activities. Our case study demonstrates the use of serial microangiography to monitor progression of acute ischemia associated with acute pediatric compartment syndrome and discusses prognostic capabilities.
There is no standard methodology or guideline for assessing soil microbial health for the purposes of contaminant risk assessments. Here we propose a laboratory-based test suite and novel data ...integration method for evaluating soil microbial health using site-specific contaminated and reference soil. The test suite encompasses experiments for evaluating microbial biomass, activity, and diversity. The results from the tests are then integrated so that a Soil Microbial Health Score (SMHS) may be assigned. This test suite and data integration method was tested on soils from 3 different contaminated sites in Canada. The soil microbial health of a petroleum hydrocarbon (PHC) contaminated site was found to be ‘Mildly Impacted’ and ‘Moderately Impacted’ for two soil horizons at a boreal forest site. The soil microbial health of the mixed metal/PHC and mixed metal sites were both found to be ‘Not Impacted’. Continued use of this test suite and data integration method will help create guidelines for assessing soil microbial health in ecological risk assessments.
•Test suite for evaluating soil microbial health•Novel data integration method generated a Soil Microbial Health Score.•Starting point for quantifying microbial health in contaminated land assessments•SMHS is able to differentiate continuation impacts at different sites.
Robotic power line maintenance systems Solyonyj, S V; Shishlakov, V F; Solenaya, O Ya ...
IOP conference series. Materials Science and Engineering,
01/2020, Letnik:
734, Številka:
1
Journal Article
Recenzirano
Odprti dostop
When transmitting electricity over long distances, overhead power lines are used. When servicing the lines, brigades of workers performing manual inspection are used. This collection of information ...is not efficient and time-consuming, since it is possible to identify only those problems that a person can see. Problems such as the destruction of insulators, the slope of the poles of power lines, a small layer of icing will remain unnoticed and will lead to serious consequences, such as a break in power lines and falling poles. If the lines are broken and the supports fall, the repair team will have to drive the entire section of the power transmission line from start to break, if the terrain allows you to use ground transportation. Provided that some lines can stretch for hundreds of kilometers - troubleshooting can stretch for several hours or even days. The use of robotic systems will prevent such accidents, and in case of their occurrence due to force majeure circumstances, speed up the search and repair. The likelihood of electric shock will also be reduced.
the factors affecting the increase in the static and dynamic stability of electric power systems are investigated. The modeling of the operating modes of the complex-closed power supply circuit was ...carried out using the DIgSilent PowerFactory software and computing system. The scheme of the electric power system with the optimal configuration and technical parameters, corresponding to the standards for ensuring the quality of electricity, was developed.
Proton inelastic scattering experiments at energy Ep=200 MeV and a spectrometer scattering angle of 0° were performed on 144,146,148,150Nd and 152Sm exciting the IsoVector Giant Dipole Resonance ...(IVGDR). Comparison with results from photo-absorption experiments reveals a shift of resonance maxima towards higher energies for vibrational and transitional nuclei. The extracted photo-absorption cross sections in the most deformed nuclei, 150Nd and 152Sm, exhibit a pronounced asymmetry rather than a distinct double-hump structure expected as a signature of K-splitting. This behaviour may be related to the proximity of these nuclei to the critical point of the phase shape transition from vibrators to rotors with a soft quadrupole deformation potential. Self-consistent random-phase approximation (RPA) calculations using the SLy6 Skyrme force provide a relevant description of the IVGDR shapes deduced from the present data.
Pediatric calcaneal acute hematogenous osteomyelitis (AHO) is a rare condition most often affecting young males. The onset of symptoms is insidious and variable, which may lead to a delay in ...diagnosis resulting in devastating lifelong sequelae. High clinical suspicion and adequate laboratory and imaging studies are imperative to reach an accurate diagnosis in a timely fashion. We present the case of a 12-year old African American male who was diagnosed with methicillin sensitive Staphylococcus aureus (MSSA) calcaneal osteomyelitis 63 days after symptom onset and two previous misdiagnoses. Treatment included hospital admission, 45 day course of IV antibiotics, 20 sessions of hyperbaric oxygen therapy (HBOT) and eight serial debridements with calcaneal biopsies. The patient was discharged following completion of antibiotic course, HBOT and three sequentially negative calcaneal biopsies. At 12 month follow up he denied pain, sensory deficits and functional disability and had returned to all previous activities. The patient's slightly older than average age, as well as the 63 day time lapse between initial onset of symptoms and diagnosis of AHO, is what makes this case report stand out from previous. To our knowledge, this is the longest reported delay in diagnosis and treatment of pediatric calcaneal AHO to date.
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