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JOURNAL ARTICLE
Rosie Kidman, Donald T McKnight, Lin Schwarzkopf, Eric J Nordberg
Behavioural thermoregulation by ectotherms is an important mechanism for maintaining body temperatures to optimise physiological performance. Experimental studies suggest that nocturnal basking by Krefft's river turtles (Emydura macquarii krefftii) in the tropics may allow them to avoid high water temperatures, however, this hypothesis has yet to be tested in the field. In this study, we examined the influence of environmental temperature on seasonal and diel patterns of basking in E. m. krefftii in tropical north Queensland, Australia...
March 26, 2024: Journal of Thermal Biology
#2
JOURNAL ARTICLE
Prabha H Shelton, Haydn N G Wadley
Gas turbine engines subject materials to extreme conditions. Their high temperature materials and co-developed coatings must survive combustion gas temperatures currently approaching 1800 °C, large thermal gradients, severe thermal shock, and static and fatigue inducing applied stresses, all the while operating in highly reactive, high-pressure, high-speed combustion gas flows containing significant partial pressures of water vapor, oxygen, and other reactive species for many tens of thousands of hours...
April 1, 2024: Review of Scientific Instruments
#3
JOURNAL ARTICLE
Xuesong Bai, Xin Qu, Raul G Nogueira, Wenhuo Chen, Hao Zhao, Wenbo Cao, Peng Gao, Bin Yang, Yabing Wang, Jian Chen, Yanfei Chen, Yuxin Wang, Feng Shang, Weitao Cheng, Yueqiao Xu, Meng Qi, Lidan Jiang, Wenjin Chen, Jie Lu, Qingfeng Ma, Ning Wang, Liqun Jiao
BACKGROUND: Patients with large acute ischemic strokes (AIS) often have a poor prognosis despite successful recanalization due to multiple factors including reperfusion injury. The authors aim to describe our preliminary experience of endovascular cooling in patients with a large AIS after recanalization. METHODS: From January 2021 to July 2022, AIS patients presenting with large infarcts (defined as ASPECTS ≤5 on noncontrast CT or ischemic core ≥50 ml on CT perfusion) who achieved successful recanalization after endovascular treatment were analyzed in a prospective registry...
April 1, 2024: International Journal of Surgery
#4
JOURNAL ARTICLE
Armin Hadžić, Matic Može, Matevž Zupančič, Iztok Golobič
The rapid progress of electronic devices has necessitated efficient heat dissipation within boiling cooling systems, underscoring the need for improvements in boiling heat transfer coefficient (HTC) and critical heat flux (CHF). While different approaches for micropillar fabrication on copper or silicon substrates have been developed and have shown significant boiling performance improvements, such enhancement approaches on aluminum surfaces are not broadly investigated, despite their industrial applicability...
April 11, 2024: Nanomaterials
#5
JOURNAL ARTICLE
Glenn A Spiering, Garrett F Godshall, Robert B Moore
Poly(ether ether ketone) (PEEK) was found to form gels in the benign solvent 1,3-diphenylacetone (DPA). Gelation of PEEK in DPA was found to form an interconnected, strut-like morphology composed of polymer axialites. To our knowledge, this is the first report of a strut-like morphology for PEEK aerogels. PEEK/DPA gels were prepared by first dissolving PEEK in DPA at 320 °C. Upon cooling to 50 °C, PEEK crystallizes and forms a gel in DPA. The PEEK/DPA phase diagram indicated that phase separation occurs by solid-liquid phase separation, implying that DPA is a good solvent for PEEK...
April 22, 2024: Gels
#6
JOURNAL ARTICLE
Adela Nicoleta Staicu, Mihaela Jana Țuculină, Cristian Niky Cumpătă, Ana Maria Rîcă, Maria Cristina Beznă, Dragoș Laurențiu Popa, Alexandru Dan Popescu, Oana Andreea Diaconu
The possibility of dental pulp damage during dental procedures is well known. According to studies, during finishing and polishing without cooling, temperatures of up to 140 °C or more can be generated. There are many studies that have analysed the influence of the finishing and polishing of fillings on the mechanical parameters, but the analysis of thermal parameters has led to uncertain results due to the difficulty of performing this in vivo. Background : We set out to conduct a study, using the finite element method, to determine the extent to which the type of class II cavity and the volume of the composite filling influence the duration of heat transfer to the pulp during finishing and polishing without cooling...
March 30, 2024: Journal of Functional Biomaterials
#7
JOURNAL ARTICLE
Thomas Thuilot, Moses-Gereon Wullweber, Matthias Fischer, Michael Bennemann, Tobias Seidl
Future automotive mobility is predominantly electric. Compared to existing systems, the requirements of subsystems change. Air flow for cooling components is needed predominantly when the car is in rest (i.e., charging) or at slow speeds. So far, actively driven fans consuming power and generating noise are used in this case. Here we propose a passive adaptive system allowing for convection-driven cooling. The developed system is a highly adaptive flat valve derived from the bordered pit. It was developed through an iterative design process including simulations, both structural and thermodynamic...
March 29, 2024: Biomimetics
#8
JOURNAL ARTICLE
Shuting Liang, Mengjun Huang, Dabo Jiang, Jianyang Chen, Liang Hu, Jiujia Chen, Zhezi Wang
Direct 3D printing of liquid metal is difficult to form and easy to destroy. In this paper, we developed a 3D printed composite material consisting of a thermoplastic polyurethane (TPU) matrix and liquid metal (LM) dispersed droplets, and introduced the method for realizing 3D printed devices with this composite material: First, the LM is added to 10~50wt %TPU at 190~200 °C through ultrasonic blending to prepare blended ink. After solid cooling, the LM-TPU composite fiber with a diameter of 600 μm was prepared by Wellzoom desktop extruder at 190 °C at an extrusion speed of 400 mm/min...
April 26, 2024: ChemistryOpen
#9
JOURNAL ARTICLE
Yuxin You, Youssef M Golestani, Dirk J Broer, Tinghong Yang, Guofu Zhou, Robin L B Selinger, Dong Yuan, Danqing Liu
We create high-aspect-ratio dynamic poly-regional surface topographies in a coating of a main-chain liquid crystal oligomer network (LCON). The topographies form at the topological defects in the director pattern organized in an array which are controlled by photopatterning of the alignment layer. The defect regions are activated by heat and/or light irradiation to form reversible topographic structures. Intrinsically, the LCON is rubbery and sensitive to temperature changes, resulting in shape transformations...
April 26, 2024: Materials Horizons
#10
JOURNAL ARTICLE
P W Crous, M M Costa, H Kandemir, M Vermaas, D Vu, L Zhao, E Arumugam, A Flakus, Ž Jurjević, M Kaliyaperumal, S Mahadevakumar, R Murugadoss, R G Shivas, Y P Tan, M J Wingfield, S E Abell, T S Marney, C Danteswari, V Darmostuk, C M Denchev, T T Denchev, J Etayo, J Gené, S Gunaseelan, V Hubka, T Illescas, G M Jansen, K Kezo, S Kumar, E Larsson, K T Mufeeda, M Piątek, P Rodriguez-Flakus, P V S R N Sarma, M Stryjak-Bogacka, D Torres-Garcia, J Vauras, D A Acal, A Akulov, K Alhudaib, M Asif, S Balashov, H-O Baral, A Baturo-Cieśniewska, D Begerow, A Beja-Pereira, M V Bianchinotti, P Bilański, S Chandranayaka, N Chellappan, D A Cowan, F A Custódio, P Czachura, G Delgado, N I De Silva, J Dijksterhuis, M Dueñas, P Eisvand, V Fachada, J Fournier, Y Fritsche, F Fuljer, K G G Ganga, M P Guerra, K Hansen, N Hywel-Jones, A M Ismail, C R Jacobs, R Jankowiak, A Karich, M Kemler, K Kisło, W Klofac, I Krisai-Greilhuber, K P D Latha, R Lebeuf, M E Lopes, S Lumyong, J G Maciá-Vicente, G Maggs-Kölling, D Magistà, P Manimohan, M P Martín, E Mazur, M Mehrabi-Koushki, A N Miller, A Mombert, E A Ossowska, K Patejuk, O L Pereira, S Piskorski, M Plaza, A R Podile, A Polhorský, W Pusz, M Raza, M Ruszkiewicz-Michalska, M Saba, R M Sánchez, R Singh, L Śliwa, M E Smith, V M Stefenon, D Strasiftáková, N Suwannarach, K Szczepańska, M T Telleria, D S Tennakoon, M Thines, R G Thorn, J Urbaniak, M van der Vegte, V Vasan, C Vila-Viçosa, H Voglmayr, M Wrzosek, J Zappelini, J Z Groenewald
Novel species of fungi described in this study include those from various countries as follows: Argentina , Neocamarosporium halophilum in leaf spots of Atriplex undulata . Australia , Aschersonia merianiae on scale insect ( Coccoidea ), Curvularia huamulaniae isolated from air, Hevansia mainiae on dead spider, Ophiocordyceps poecilometigena on Poecilometis sp. Bolivia , Lecanora menthoides on sandstone, in open semi-desert montane areas, Sticta monlueckiorum corticolous in a forest, Trichonectria epimegalosporae on apothecia of corticolous Megalospora sulphurata var...
June 2023: Persoonia
#11
JOURNAL ARTICLE
Tarun Kumar Roy, Yujie Qian, Elizabeth Karlsson, Rawan Rabayah, Christopher A Sojdak, Marisa C Kozlowski, Tolga N V Karsili, Marsha I Lester
Organic hydroperoxides (ROOH) are ubiquitous in the atmospheric oxidation of volatile organic compounds (VOCs) as well as in low-temperature oxidation of hydrocarbon fuels. The present work focuses on a prototypical cyclic hydroperoxide, cyclohexyl hydroperoxide (CHHP). The overtone OH stretch (2 ν OH ) spectrum of jet-cooled CHHP is recorded by IR multiphoton excitation with UV laser-induced fluorescence detection of the resulting OH products. A distinctive IR feature is observed at 7012.5 cm-1 . Two conformers of CHHP are predicted to have similar stabilities (within 0...
April 24, 2024: Chemical Science
#12
JOURNAL ARTICLE
Jiro Abe, Takashi Nasu, Ayumu Noro, Junko Tsubaki
BACKGROUND: We present a severe neonatal consequence due to the unexpected and crucial inversion of the fetal position after sudden termination of tocolysis during early labor of a woman with congenital uterine anomaly. It has been reported that congenital uterine anomalies latently affect the fetal position. The clinical pitfalls in childbirth with uterine anomalies are discussed here on the basis of clinical evidence. CASE PRESENTATION: At a perinatal medical center in Japan, a 29-year-old Japanese mother who had a history of bicornuate uterus, received tocolysis to prolong her pregnancy for 5 days during the late preterm period after preterm-premature rupture of the membrane...
April 26, 2024: Journal of Medical Case Reports
#13
RANDOMIZED CONTROLLED TRIAL
Sigurd Mydske, Guttorm Brattebø, Øyvind Østerås, Øystein Wiggen, Jörg Assmus, Øyvind Thomassen
BACKGROUND: Use of a vapor barrier in the prehospital care of cold-stressed or hypothermic patients aims to reduce evaporative heat loss and accelerate rewarming. The application of a vapor barrier is recommended in various guidelines, along with both insulating and wind/waterproof layers and an active external rewarming device; however, evidence of its effect is limited. This study aimed to investigate the effect of using a vapor barrier as the inner layer in the recommended "burrito" model for wrapping hypothermic patients in the field...
April 25, 2024: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
#14
REVIEW
Syed Shozab Ahmed, Nandu Goswami, Adam Sirek, David Andrew Green, Andrew Winnard, Leonie Fiebig, Tobias Weber
A systematic review of literature was conducted to evaluate the effectiveness of passive countermeasures in ameliorating the cardiopulmonary and musculoskeletal effects of gravitational unloading on humans during spaceflight. This systematic review is the third of a series being conducted by the European Space Agency to evaluate the effectiveness of countermeasures to physiologic deconditioning during spaceflight. With future long-duration space missions on the horizon, it is critical to understand the effectiveness of existing countermeasures to promote astronaut health and improve the probability of future mission success...
April 25, 2024: NPJ Microgravity
#15
JOURNAL ARTICLE
Amanda Martyniuk, Shannon Hart, Melissa Lannon, Alexander Mastrolonardo, Aseel Kabbani, Dana Abdel Hafeez, Paul T Engels, Sunjay Sharma
BACKGROUND: The main focus of traumatic brain injury (TBI) management is prevention of secondary injury. Therapeutic hypothermia (TH), the induction of a targeted low core body temperature, has been explored as a potential neuroprotectant in TBI. The aim of this article is to synthesize the available clinical data comparing the use of TH with the use of normothermia in TBI. METHODS: A systematic search was conducted through MEDLINE, EMBASE, and Cochrane Central Register of Controlled Trials for randomized clinical trials including one or more outcome of interest associated with TH use in TBI...
April 25, 2024: Neurocritical Care
#16
REVIEW
Prakash Kumar Paudel, Saraswati Dhakal, Shailendra Sharma
Ecosystems provide valuable services in reducing the risks of disasters through various pathways, which are increasingly recognized as sustainable strategies for disaster management. However, there remains limited information on the underlying ecological processes of risk reduction. This paper addresses this gap by synthesizing ecological mechanisms and evaluating the 'level of evidence' and 'scale of use' through a review of 64 peer-reviewed research articles published between 2015 to 2022. These research articles covered nine types of disasters, predominantly floods (42...
April 23, 2024: Science of the Total Environment
#17
REVIEW
Hela Jdidi, Benoit Dugué, Claire de Bisschop, Olivier Dupuy, Wafa Douzi
BACKGROUND: Cryostimulation and cold-water immersion (CWI) have recently gained widespread attention due to their association with changes in cardiovascular and cardiac autonomic control responses. Therefore, the aim of the present systematic review and meta-analysis was to identify the global impact of such cold exposures on cardiovascular and cardiac autonomic activity. METHODS: Three databases (PubMed, Embase, Web-of-Science) were used. Studies were eligible for inclusion if they were conducted on healthy participants using cryostimulation and/or CWI...
April 18, 2024: Journal of Thermal Biology
#18
JOURNAL ARTICLE
Belén Pequeño, María Gemma Millán de la Blanca, Cristina Castaño, Adolfo Toledano-Díaz, Milagros Cristina Esteso, Esther Alba, Francisco A Arrebola, Rodolfo Ungerfeld, Belén Martínez-Madrid, Manuel Alvarez-Rodriguez, Heriberto Rodriguez-Martinez, Julián Santiago-Moreno
The freeze-thawing process induces osmotic changes that may affect the membrane domain location of aquaporins' (AQP) in spermatozoa. Recent studies suggest that changes in AQP3 localization allows better sperm osmo-adaptation, improving the cryoresistance. Ultra-rapid freezing is an alternative cryopreservation technique that requires less equipment than conventional freezing, and it is faster, simpler and can be used in the field. This study aimed to determine the influence of freezing-thawing rates (slow (control) vs...
April 19, 2024: Theriogenology
#19
JOURNAL ARTICLE
Han-Wen Gao, Hyun Wook Choi, Jie Hui, Lai-Sheng Wang
We report a high-resolution photoelectron imaging study of cryogenically cooled BiB2 - and BiB3 - clusters. Vibrational features are completely resolved for the ground-state detachment transitions, providing critical information about the structures of the anionic clusters and their corresponding neutrals. The electron affinities of BiB2 and BiB3 are accurately measured to be 2.174(1) and 2.121(1) eV, respectively. The B-B and Bi-B stretching frequencies are measured to be 1262 and 476 cm-1 , respectively, in the ground state of BiB2 ...
April 25, 2024: Journal of Physical Chemistry. A
#20
JOURNAL ARTICLE
Sergey Peredkov, Nilson Pereira, Daniel Grötzsch, Stefan Hendel, Dirk Wallacher, Serena DeBeer
A high-flux beamline optimized for non-resonant X-ray emission spectroscopy (XES) in the tender X-ray energy range has been constructed at the BESSY II synchrotron source. The beamline utilizes a cryogenically cooled undulator that provides X-rays over the energy range 2.1 keV to 9.5 keV. This energy range provides access to XES [and in the future X-ray absorption spectroscopy (XAS)] studies of transition metals ranging from Ti to Cu (Kα, Kβ lines) and Zr to Ag (Lα, Lβ), as well as light elements including P, S, Cl, K and Ca (Kα, Kβ)...
May 1, 2024: Journal of Synchrotron Radiation
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