scholarly journals Temperature-induced tissue susceptibility changes lead to significant temperature errors in PRFS-based MR thermometry during thermal interventions

2010 ◽  
Vol 64 (5) ◽  
pp. 1360-1372 ◽  
Author(s):  
Sara M. Sprinkhuizen ◽  
Maurits K. Konings ◽  
Martijn J. van der Bom ◽  
Max A. Viergever ◽  
Chris J. G. Bakker ◽  
...  
Keyword(s):  
Mr Thermometry ◽  
Significant Temperature ◽  
Temperature Errors

Temperature Dependence of the Susceptibility of Fat Leads to Significant Temperature Errors in PRFS-based MR Thermometry

2010 ◽  
Author(s):  
S. M. Sprinkhuizen ◽  
M. K. Konings ◽  
C. J. G. Bakker ◽  
L. W. Bartels ◽  
Kullervo Hynynen ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Mr Thermometry ◽  
Significant Temperature ◽  
Temperature Errors

Effect of Type of Tissue on the Development of Chrysomya rufifacies (Diptera: Calliphoridae) in Sri Lanka

2021 ◽  
Author(s):  
Y T B Bambaradeniya ◽  
W A I P Karunaratne ◽  
J K Tomberlin ◽  
P A Magni
Keyword(s):  
Skeletal Muscle ◽  
Sri Lanka ◽  
Forensic Entomology ◽  
Development Time ◽  
Developmental Studies ◽  
Chrysomya Rufifacies ◽  
Significant Difference ◽  
The World ◽  
Significant Temperature ◽  
Domestic Swine

Abstract Chrysomya rufifacies (Macquart), the hairy maggot blow fly, is of great importance for the field of forensic entomology due to its habit as an early colonizer of decomposing vertebrate remains and myiasis producer. Development studies on this species have been conducted in scattered regions of the world, using types of tissue from several species of animals as a rearing medium. Despite the commonality of C. rufifacies in Sri Lanka, developmental studies have never been performed in this region. As well, the effects of diet on development have not been tested. In the current study, C. rufifacies immatures were reared on skeletal muscle, liver, and heart from domestic swine, with flies from colonies maintained at 25 and 28°C. The minimum time needed to complete each stage at 25°C on liver (224.14 h) was fastest followed by skeletal muscle (249.33 h) and heart (251.64 h) respectively, whereas at 28°C, fly development was quickest on heart muscle (178.27 h) followed by liver (178.50 h) and skeletal muscle (186.17 h) respectively. A significant difference in total development time was determined for temperature, while the rearing medium was not significant. Temperature also showed a significant effect on the length and the width of the larvae, while the type of tissue statistically impacted only the width.

scholarly journals Temperature Distribution in the Insulation System of Condenser-Type HV Bushing—Its Effect on Dielectric Response in the Frequency Domain

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 4016
Author(s):  
Krzysztof Walczak ◽  
Jaroslaw Gielniak
Keyword(s):  
Temperature Distribution ◽  
Working Conditions ◽  
Dielectric Response ◽  
Power Transformers ◽  
Response Analysis ◽  
Insulation System ◽  
Large Power ◽  
Catastrophic Failures ◽  
Significant Temperature ◽  
Specific Construction

HV bushings are an important part of the equipment of large power transformers, responsible for their many serious (including catastrophic) failures. Their proper exploitation needs to apply correct and reliable diagnostics, e.g., the use of dielectric response methods, that take into account their specific construction and working conditions. In this article, based on laboratory tests carried out on a real bushing, it has been shown that the significant temperature distribution within its core significantly affects the shape of the dielectric response of its insulation; therefore, the approach to its modeling should be changed. Hence, a new method for interpreting the results, using the so-called the 2XY model, is proposed. Subsequently, based on the measurements made on the insulators in operation, a new modeling method was verified. In conclusion, it can be stated that the 2XY model significantly improves the reliability of the dielectric response analysis, which should be confirmed in the future by tests on withdrawn and revised insulators.

scholarly journals Effects of Temperature and Host Concentration on the Supramolecular Enantiodifferentiating [4 + 4] Photodimerization of 2-Anthracenecarboxylate through Triplet-Triplet Annihilation Catalyzed by Pt-Modified Cyclodextrins

Molecules ◽  
2019 ◽  
Vol 24 (8) ◽  
pp. 1502 ◽  
Author(s):  
Ming Rao ◽  
Wanhua Wu ◽  
Cheng Yang
Keyword(s):  
Light Emitting Diode ◽  
Temperature Dependency ◽  
Light Emitting ◽  
Modified Cyclodextrins ◽  
Direct Irradiation ◽  
Visible Light Driven ◽  
Significant Temperature ◽  
Effects Of Temperature ◽  
532 Nm ◽  
Triplet Triplet Annihilation

Visible-light-driven photocatalytic supramolecular enantiodifferentiating dimerization of 2-anthracenecarboxylic acid (AC) through triplet-triplet annihilation (TTA), mediated by the Schiff base Pt(II) complex (Pt-1, Pt-2, and Pt-3) was studied. The host concentration and the temperature effects on the stereoselectivity were comprehensively investigated. Increasing the concentration of sensitizers/hosts significantly enhanced the conversion of the photoreaction but led to reduced enantioselectivities of the chiral photodimers 2 and 3 when the photoreaction was triggered by a 532 nm laser, which was in contrast with the results obtained by direct irradiation of AC with a 365 nm light-emitting diode (LED) lamp, due to the aggregation of the sensitizer/host in water. The cyclization of AC through triplet-triplet annihilation displayed significant temperature dependency when Pt-3 was employed as the sensitizer/host. Increasing the temperature from 0 °C to 30 °C with 5% equiv. of Pt-3 led to a great increase of the ee of 2 from 2.1% to 31.6%. However, hardly any temperature dependency was observed when the photodimerization was mediated by other sensitizers and/or hosts, or the photoreaction was triggered directly with a 365 nm LED lamp.

MR thermometry-based feedback control of efficacy and safety in minimum-time thermal therapies: Phantom andin-vivoevaluations

2006 ◽  
Vol 22 (1) ◽  
pp. 29-42 ◽  
Author(s):  
Dhiraj Arora ◽  
Daniel Cooley ◽  
Trent Perry ◽  
Junyu Guo ◽  
Andrew Richardson ◽  
...  
Keyword(s):  
Feedback Control ◽  
Minimum Time ◽  
Efficacy And Safety ◽  
Mr Thermometry ◽  
Thermal Therapies

scholarly journals Toward Volumetric MR Thermometry With the MASTER Sequence

2015 ◽  
Vol 34 (1) ◽  
pp. 148-155 ◽  
Author(s):  
Michael Marx ◽  
Juan Plata ◽  
Kim Butts Pauly
Keyword(s):  
Mr Thermometry

scholarly journals Online correction of respiratory-induced field disturbances for continuous MR-thermometry in the breast

2009 ◽  
Vol 61 (6) ◽  
pp. 1494-1499 ◽  
Author(s):  
S. Hey ◽  
G. Maclair ◽  
B. D. de Senneville ◽  
M. Lepetit-Coiffe ◽  
Y. Berber ◽  
...  
Keyword(s):  
Mr Thermometry ◽  
Online Correction ◽  
Induced Field

Temperature-sensitive poly(N-isopropylacrylamide) (PNIPAAm) stabilized size controllable synthesis of silver nanoparticles and its improved antimicrobial activity for wound healing and nursing care after femoral fracture during surgery

2021 ◽  
Vol 11 (1) ◽  
pp. 73-84
Author(s):  
Xiaoyun Wang ◽  
Jing Zhang
Keyword(s):  
Wound Healing ◽  
Silver Nanoparticles ◽  
Femoral Fracture ◽  
Bacterial Resistance ◽  
Polymer Nanocomposite ◽  
Temperature Sensitive ◽  
Solution Stability ◽  
Uniform Dispersion ◽  
Significant Temperature ◽  
Thermosensitive Copolymer

In this research, a thermo-sensitive copolymer PNIPAAm-co-MHq was used to successfully synthesize different nano sizes silver nanoparticles in the ranges between 1.5 to 4 nm with uniform dispersion. The polymeric assisted synthesized Ag nanoparticles (AgNPs@PM) exhibited reasonable solution stability and thermalresponsive behaviour. In specific, AgNPs@PM3 (1.59 nm) displayed improved bacterial resistance against clinically approved anti-biotic resistant bacterial pathigens with very low MIC value (4.05 μg/mL). Subsequently, the thermal responsive polymeric molecular structure on AgNPs synthesis has been established that significant temperature dependened anti-bacterial efficiency. It was also observed that the nonparticipants size, temperature responses and proportion of thermosensitive copolymer also influenced the antibacterial efficacy of AgNPs@PM. Resulting thermal sensitive polymer nanocomposite can be extremely beneficial for wound healing treatment after femoral fracture surgery.

scholarly journals The thermal stress of roller-compacted concrete dams during construction

2018 ◽  
Vol 196 ◽  
pp. 04059 ◽  
Author(s):  
Nikolay Aniskin ◽  
Chuc Nguyen Trong
Keyword(s):  
Thermal Stress ◽  
Temperature Regime ◽  
The Body ◽  
Experiment Planning ◽  
Concrete Dams ◽  
Concrete Dam ◽  
Roller Compacted Concrete ◽  
Significant Temperature ◽  
Maximum Temperatures ◽  
Under Construction

During the construction of concrete dams from rolled-compacted concrete, the main effect on the structure are the temperature effects. As a result of heat generation during hydration of cement and the influence of many other factors, significant temperature gradients and cracks may occur. In this paper, the optimal maximum temperatures arising in the body of the concrete dam under construction are determined by the method of experiment planning and the method of numerical simulation - the finite element method. The analysis of the influence of the acting factors on the temperature regime and the thermal stressed state at the rock-built concrete dam from rolled concrete is carried out. The dependences are obtained and nomograms are constructed to determine the optimal parameters. With the help of the computer program Midas Civil 2011, calculations of the temperature regime of the constructed dam were carried out and the maximum temperatures were determined. The calculations of thermal stress state of the structure along with an analysis of the possible cracking are conducted.

scholarly journals The role of enzyme dynamics and tunnelling in catalysing hydride transfer: studies of distal mutants of dihydrofolate reductase

2006 ◽  
Vol 361 (1472) ◽  
pp. 1307-1315 ◽  
Author(s):  
Lin Wang ◽  
Nina M Goodey ◽  
Stephen J Benkovic ◽  
Amnon Kohen
Keyword(s):  
Temperature Dependence ◽  
Dihydrofolate Reductase ◽  
Isotope Effects ◽  
Hydride Transfer ◽  
Activation Parameters ◽  
Physical Nature ◽  
Enzyme Dynamics ◽  
Temperature Dependences ◽  
Donor Acceptor ◽  
Significant Temperature

Residues M42 and G121 of Escherichia coli dihydrofolate reductase ( ec DHFR) are on opposite sides of the catalytic centre (15 and 19 Å away from it, respectively). Theoretical studies have suggested that these distal residues might be part of a dynamics network coupled to the reaction catalysed at the active site. The ec DHFR mutant G121V has been extensively studied and appeared to have a significant effect on rate, but only a mild effect on the nature of H-transfer. The present work examines the effect of M42W on the physical nature of the catalysed hydride transfer step. Intrinsic kinetic isotope effects (KIEs), their temperature dependence and activation parameters were studied. The findings presented here are in accordance with the environmentally coupled hydrogen tunnelling. In contrast to the wild-type (WT), fluctuations of the donor–acceptor distance were required, leading to a significant temperature dependence of KIEs and deflated intercepts. A comparison of M42W and G121V to the WT enzyme revealed that the reduced rates, the inflated primary KIEs and their temperature dependences resulted from an imperfect potential surface pre-arrangement relative to the WT enzyme. Apparently, the coupling of the enzyme's dynamics to the reaction coordinate was altered by the mutation, supporting the models in which dynamics of the whole protein is coupled to its catalysed chemistry.

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