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1. An optimal two-bout strategy with phase change material cooling vests to improve comfort in hot environment

Author:
Itani, Mariam; Ghaddar, Nesreen; Ouahrani, Djamel; Ghali, Kamel; Khater, Beatrice
Source:
Journal of thermal biology 2018 v.72 pp. 10-25
ISSN:
0306-4565
Subject:
cooling; energy; heat; humans; melting point; metabolism; models; phase transition; sensation
Abstract:
... Cooling vests incorporating phase change material (PCM) packets are used to improve comfort of workers in hot environments. This work aims to investigate by modeling and experimentation the effect of dividing the working duration into two bouts, where different PCM melting temperatures are used in each bout. An integrated bio-heat and fabric-PCM model predictions of physiological and subjective vo ...
DOI:
10.1016/j.jtherbio.2017.12.005

2. A simulated heat wave shortens the telomere length and lifespan of a desert lizard

Author:
Zhang, Qiong; Han, Xingzhi; Hao, Xin; Ma, Liang; Li, Shuran; Wang, Yang; Du, Weiguo
Source:
Journal of thermal biology 2018 v.72 pp. 94-100
ISSN:
0306-4565
Subject:
Phrynocephalus przewalskii; antioxidant activity; biodiversity; global warming; heat; lizards; longevity; oxidative stress; telomeres; temperature
Abstract:
... Understanding how organisms respond to warming contributes important information to the conservation of biodiversity that is threatened by climate warming. Here, we conducted experiments on a desert agama (Phrynocephalus przewalskii) to test the hypothesis that climate warming (an increase in both mean temperature and heat waves) would induce oxidative stress, shortening telomere length, and there ...
DOI:
10.1016/j.jtherbio.2018.01.004

3. Bursty spike trains of antennal thermo- and bimodal hygro-thermoreceptor neurons encode noxious heat in elaterid beetles

Author:
Nurme, Karin; Merivee, Enno; Must, Anne; Di Giulio, Andrea; Muzzi, Maurizio; Williams, Ingrid; Mänd, Marika
Source:
Journal of thermal biology 2018 v.72 pp. 101-117
ISSN:
0306-4565
Subject:
Carabidae; death; early warning systems; electrophysiology; heat; heat tolerance; humidity; innervation; insects; locomotion; paralysis; scanning electron microscopy; sensilla; sensory neurons; temperature; thermoregulation
Abstract:
... The main purpose of this study was to explain the internal fine structure of potential antennal thermo- and hygroreceptive sensilla, their innervation specifics, and responses of the sensory neurons to thermal and humidity stimuli in an elaterid beetle using focused ion beam scanning electron microscopy and electrophysiology, respectively. Several essential, high temperature induced turning points ...
DOI:
10.1016/j.jtherbio.2018.01.008

4. Estimation of the optimum number and location of nanoparticle injections and the specific loss power for ideal hyperthermia

Author:
Boroon, Mostafa Pasandi; Ayani, Mohammad-Bagher; Bazaz, Sajad Razavi
Source:
Journal of thermal biology 2018 v.72 pp. 127-136
ISSN:
0306-4565
Subject:
brain; energy; equations; fever; heat; magnetic fields; magnetic materials; nanoparticles; neoplasms; remission; thermotherapy; tissues
Abstract:
... Hyperthermia is one of the most appealing methods of cancer treatment in which the temperature of tumor is elevated to reach a desired temperature. One of the methods of increasing tissue temperature is injection of nanoparticle fluids to tumor and applying alternative magnetic field, which is called magnetic nanoparticle hyperthermia method. The total number of injection points, as well as the th ...
DOI:
10.1016/j.jtherbio.2018.01.010

5. Influence of extreme heat or cold stresses on body pigmentation of Drosophila melanogaster

Author:
Pétavy, Georges; Moreteau, Brigitte; David, Jean R.; Gibert, Patricia
Source:
Journal of thermal biology 2018 v.72 pp. 118-126
ISSN:
0306-4565
Subject:
Drosophila melanogaster; body size; cold stress; genetic correlation; genetic variation; heat; phenotype; pigmentation; temperature; variance
Abstract:
... Thoracic and abdominal pigmentation were measured in Drosophila melanogaster under a cold circadian stress (8–25 °C) and a heat one (18–33 °C) and compared to the phenotypes observed under similar but constant temperatures of 17 or 25 °C respectively. An isofemale line design permitted to submit each line (full sibs) to the four thermal regimes. Under cold stress, the pigmentation was similar to t ...
DOI:
10.1016/j.jtherbio.2018.01.005

6. Investigating factors affecting the body temperature of dogs competing in cross country (canicross) races in the UK

Author:
Carter, Anne J.; Hall, Emily J.
Source:
Journal of thermal biology 2018 v.72 pp. 33-38
ISSN:
0306-4565
Subject:
color; cooling; dogs; environmental factors; exercise; fever; harness; heat; heat stroke; humans; males; risk; sports; summer; winter; United Kingdom
Abstract:
... Increasing numbers of people are running with their dogs, particularly in harness through the sport canicross. Whilst canicross races are typically held in the winter months, some human centred events are encouraging running with dogs in summer months, potentially putting dogs at risk of heat related injuries, including heatstroke. The aim of this project was to investigate the effects of ambient ...
DOI:
10.1016/j.jtherbio.2017.12.006

7. Short-term heat stress results in increased apoptotic signaling and autophagy in oxidative skeletal muscle in Sus scrofa

Author:
Ganesan, Shanthi; Pearce, Sarah C.; Gabler, Nicholas K.; Baumgard, Lance H.; Rhoads, Robert P.; Selsby, Joshua T.
Source:
Journal of thermal biology 2018 v.72 pp. 73-80
ISSN:
0306-4565
Subject:
Sus scrofa; apoptosis; caspase-3; environmental exposure; fever; heat; heat stress; humans; mitophagy; mortality; skeletal muscle; swine
Abstract:
... Prolonged environment-induced hyperthermia causes morbidities and mortality in humans and animals and appears to cause organ-specific injury and dysfunction. We have previously determined autophagic dysfunction and apoptotic signaling in oxidative skeletal muscle following prolonged hyperthermia. The aim of this investigation was to extend our knowledge regarding the early chronology of heat stres ...
DOI:
10.1016/j.jtherbio.2018.01.003

8. The effect of ice slurry ingestion on body temperature and cycling performance in competitive athletes

Author:
Mejuto, Gaizka; Chalmers, Samuel; Gilbert, Stephanie; Bentley, David
Source:
Journal of thermal biology 2018 v.72 pp. 143-147
ISSN:
0306-4565
Subject:
athletes; beverages; bicycling; blood; body temperature; cooling; cross-over studies; exercise; heart rate; heat; ice; ingestion; lactic acid; precooling; relative humidity; sensation; slurries
Abstract:
... The effects of pre cooling on endurance performance are widely known. In contrast, the approach of cooling during endurance exercise in combination with pre-exercise cooling has been poorly understood. The purpose of the present study was to determine whether the effects of precooling and cooling during exercise enhance exercise performance compared to the ingestion of a thermo-neutral beverage (2 ...
DOI:
10.1016/j.jtherbio.2018.01.012