Dietary Moringa oleifera improves growth performance, oxidative status, and immune related gene expression in broilers under normal and high temperature conditions
Publication date: May 2019Source: Journal of Thermal Biology, Volume 82Author(s): Mahmoud H. El-Deep, Mahmoud A.O. Dawood, Mohamed H. Assar, Daichi Ijiri, Akira OhtsukaAbstractThe aim of this study is to evaluate the effects of Moringa oleifera (MO) on the performance, antioxidative status, and immune related gene expression in broilers raised under normal or heat stress conditions. Broiler chickens were distributed into 4 groups and fed diets with dietary MO at 0% or 5% (MO0 or MO5) and raised under ambient temperature 22 ± 1 °C (N) or 35±1 °C (HS). HS conditions negatively affected the weigh...
Source: Journal of Thermal Biology - April 25, 2019 Category: Biology Source Type: research

Temperature and oxygen related ecophysiological traits of snow trout (Schizothorax richardsonii) are sensitive to seasonal changes in a Himalayan stream environment
In this study, we investigated the seasonal changes in key eco-physiological traits of a wild population of snow trout, Schizothorax richardsonii from river Gola in the Indian Himalayan region over one year. Live specimens (5.8–31.4 g) were electro-fished from their natural habitat during representative months of four seasons with notable differences in water temperature, oxygen concentration and saturation. After 24–72 h of captive-acclimation, the fishes were examined for upper and lower critical thermal limits (CTmax and CTmin), incipient lethal oxygen thresholds (ILOC and ILOS), apparent routine and max...
Source: Journal of Thermal Biology - April 22, 2019 Category: Biology Source Type: research

Concurrent validity of supraclavicular skin temperature measured with iButtons and infrared thermography as a surrogate marker of brown adipose tissue
Publication date: Available online 20 April 2019Source: Journal of Thermal BiologyAuthor(s): Borja Martinez-Tellez, Alejandro Perez-Bey, Guillermo Sanchez-Delgado, Francisco M. Acosta, Juan Corral-Perez, Francisco J. Amaro-Gahete, Juan M.A. Alcantara, Jose Castro-Piñero, David Jimenez-Pavon, Jose M. Llamas-Elvira, Jonatan R. RuizAbstractBrown adipose tissue (BAT) thermogenic activity is commonly assessed with a positron emission tomography with computed tomography scan (PET/CT). This technique has several limitations and alternative techniques are needed. Supraclavicular skin temperature measured with iButtons and i...
Source: Journal of Thermal Biology - April 22, 2019 Category: Biology Source Type: research

Generalized solution and estimation method for cooling performance of downscaled cryoprobe
In this study, a set of analytical solutions to the freezing phenomenon around a cryoprobe in a dimensionless form is derived and the general trend is discussed to clarify the relationship between the freezing ability of a biological tissue and the cooling power of a cryoprobe. A one-dimensional axisymmetric model in the steady-state condition is considered. The relationship between the size of the frozen region, fluid temperature in the cryoprobe, and heat transfer coefficient on the wall of the cryoprobe in the dimensional form is derived under the condition mentioned above. The fluid temperature and heat transfer coeffi...
Source: Journal of Thermal Biology - April 22, 2019 Category: Biology Source Type: research

Spontaneously hypertensive rats have greater impairments in regulating abdominal temperature than brain cortex temperature following physical exercise
In conclusion, the present results highlight that SHRs, an animal model that mimics uncontrolled essential hypertension in humans, exhibited greater impairments in regulating Tabd than Tbrain during the post-exercise period. (Source: Journal of Thermal Biology)
Source: Journal of Thermal Biology - April 20, 2019 Category: Biology Source Type: research

Biomedical musculoskeletal applications of infrared thermal imaging on arm and forearm: A systematic review
Publication date: Available online 18 April 2019Source: Journal of Thermal BiologyAuthor(s): Ricardo Vardasca, Carolina Magalhaes, Pedro Silva, Paulo Abreu, Joaquim Mendes, Maria T. RestivoAbstractInfrared thermal imaging (IRT) has been a target of research for biomedical musculoskeletal applications, due to the possible association of the physiological data that it provides, through skin temperature measurement, with pathological states. The aim of this systematic review is to acquaint the outcomes of the biomedical application of IRT in arm and forearm evaluation and its future perspectives of research. During the litera...
Source: Journal of Thermal Biology - April 19, 2019 Category: Biology Source Type: research

Use of grape residue flour in lactating dairy sheep in heat stress: Effects on health, milk production and milk quality
The objective of this study was to evaluate the effects of grape residue flour (GRF) on antioxidant activities, biochemistry variables, components of the immune system and milk production and quality of Lacaune sheep in heat stress. Twenty-seven multiparous lactating sheep [50 ± 1.8 days (d) milking] were stratified by initial body weight, age, date of lambing and milk production and assigned randomly to 1 of 3 treatments (9 sheep/treatment): no GRF supplementation (control group) or supplementation at 1% (10 g/kg GRF) or 2% (20 g/kg GRF) of GRF (bark and seed) in the concentrate (grains and minerals mixture...
Source: Journal of Thermal Biology - April 17, 2019 Category: Biology Source Type: research

Supraclavicular skin temperature measured by iButtons and 18F-fluorodeoxyglucose uptake by brown adipose tissue in adults
In conclusion, supraclavicular skin temperature in warm and cold conditions seems to be related with cold-induced 18F-FDG uptake by BAT only in women, although the low explained variance of these associations means that there are other factors involved in the supraclavicular skin temperature. (Source: Journal of Thermal Biology)
Source: Journal of Thermal Biology - April 17, 2019 Category: Biology Source Type: research

Liver proteomics of gilthead sea bream (Sparus aurata) exposed to cold stress
In this study, an 8 week feeding trial was carried out on gilthead sea bream juveniles reared in a Recirculated Aquaculture System (RAS) by applying a temperature ramp in two phases of four weeks each: a cooling phase from 18 °C to 11 °C and a cold maintenance phase at 11 °C. Liver protein profiles were evaluated with a shotgun proteomics workflow based on filter-aided sample preparation (FASP) and liquid chromatography-mass spectrometry (LC-ESI-Q-TOF MS/MS) followed by label-free differential analysis. Along the whole trial, sea breams underwent several changes in liver protein abundance. These occurred ...
Source: Journal of Thermal Biology - April 17, 2019 Category: Biology Source Type: research

Low cold tolerance of the invasive lizard Eutropis multifasciata constrains its potential elevation distribution in Taiwan
This study highlights that the winter climate is a major factor in determining population establishment and hence in limiting this species’ range. Future studies would benefit from accounting for low winter temperatures and their potential influence on range limits of invasive species. (Source: Journal of Thermal Biology)
Source: Journal of Thermal Biology - April 17, 2019 Category: Biology Source Type: research

Numerous cold arousals and rare arousal cascades as a hibernation strategy in European Myotis bats
Publication date: Available online 15 April 2019Source: Journal of Thermal BiologyAuthor(s): Ján Blažek, Jan Zukal, Hana Bandouchova, Hana Berková, Veronika Kovacova, Natália Martínková, Jiri Pikula, Zdeněk Řehák, Pavel Škrabánek, Tomáš BartoničkaAbstractHibernating bats optimise the duration of torpor bouts and arousals in relation to hibernaculum microclimatic conditions and fat reserves. Clustering has significant physiological and ecological benefits, promoting successful hibernation of individuals. Such aggregations may help maintain optimal tem...
Source: Journal of Thermal Biology - April 16, 2019 Category: Biology Source Type: research

Relationships of body surface thermography with core temperature, birth weight and climatic variables in neonatal lambs born during early spring in an arid region
In conclusion, under early spring environment (predominantly cold), the variations in body surface temperatures of hair sheep neonates were more closely related to climatic variables than to RT and BW. Thermography proved to be an effective tool to determine body heat loss by radiation in skin of neonate lambs. (Source: Journal of Thermal Biology)
Source: Journal of Thermal Biology - April 16, 2019 Category: Biology Source Type: research

An analytical study on the fractional transient heating within the skin tissue during the thermal therapy
In conclusion, a parametric analysis is devoted to the identification of an appropriate procedure for selecting important design variables to reach effective heating in hyperthermia treatment. (Source: Journal of Thermal Biology)
Source: Journal of Thermal Biology - April 16, 2019 Category: Biology Source Type: research

Would personal cooling vest be effective for use during exercise by people with thoracic spinal cord injury?
Publication date: Available online 13 April 2019Source: Journal of Thermal BiologyAuthor(s): Farah Mneimneh, Nesreen Ghaddar, Kamel Ghali, Charbel Moussalem, Ibrahim OmeisAbstractPeople with thoracic spinal cord injury (SCI), named people with paraplegia (PA), are vulnerable to thermal heat stress during exercise due to disruption in their thermal physiology. Using personal cooling vests with phase change material (PCM) or ice presents a possible solution for PA to suppress the increase in core temperature and body heat storage. With the limited published experimental studies about effective cooling vest for PA, this work ...
Source: Journal of Thermal Biology - April 14, 2019 Category: Biology Source Type: research

Editorial Board
Publication date: April 2019Source: Journal of Thermal Biology, Volume 81Author(s): (Source: Journal of Thermal Biology)
Source: Journal of Thermal Biology - April 10, 2019 Category: Biology Source Type: research

Heat seekers: A tropical nocturnal lizard uses behavioral thermoregulation to exploit rare microclimates at night
Publication date: Available online 4 April 2019Source: Journal of Thermal BiologyAuthor(s): Eric J. Nordberg, Lin SchwarzkopfAbstractEnvironmental temperatures play a vital role in the physiological and behavioral activity of ectotherms. Behavioral thermoregulation allows animals to modify their body temperature to optimize functions critical to fitness, including digestion, growth, reproduction, and locomotor performance. Diurnal reptiles are a classic model system to answer questions related to thermal ecology, whereas behavioral thermoregulation in nocturnal species is thought to be strongly constrained by low environme...
Source: Journal of Thermal Biology - April 5, 2019 Category: Biology Source Type: research

Reassessment of temperature-humidity index for measuring heat stress in crossbred dairy cattle of a sub-tropical region
Publication date: Available online 3 April 2019Source: Journal of Thermal BiologyAuthor(s): Rakhshan Jeelani, Dipanjali Konwar, Asma Khan, Dhirendra Kumar, Dibyendu Chakraborty, Biswajit BrahmaAbstractThe temperature-humidity index (THI) has been extensively applied for assessing heat stress in moderate to hot conditions in dairy cattle. However, there exist wide variation between researchers in defining an appropriate range of THI values for denoting different levels of stress. The present study was aimed to reassess previously described heat stress indicators of dairy cattle of sub-tropical region of India. From comparat...
Source: Journal of Thermal Biology - April 3, 2019 Category: Biology Source Type: research

Low cold tolerance of the invasive lizard Eutropis multifasciata constraints its potential elevation distribution in Taiwan
This study highlights that the winter climate is a major factor in determining population establishment and hence in limiting this species’ range. Future studies would benefit from accounting for low winter temperatures and their potential influence on range limits of invasive species. (Source: Journal of Thermal Biology)
Source: Journal of Thermal Biology - March 30, 2019 Category: Biology Source Type: research

Thermotolerance indicators related to production and physiological responses to heat stress of holstein cows
This study aimed to investigate the effects of HS on production and physiological parameters of Holstein cows. Two experiments each lasted 6 weeks were conducted in four Tunisian farms, firstly during summer under HS (n = 80, THI = 77) and later during autumn under thermo-neutral (n = 80, THI = 54) conditions. Respiration rate (RR), skin temperature (ST), rectal temperature (RT) and milk yield were measured, and milk samples were collected on 2 days every week during each experimental period. Temperature and relative humidity were measured inside the barn to calculate the temperature-humidity index (THI). M...
Source: Journal of Thermal Biology - March 27, 2019 Category: Biology Source Type: research

Thermal and cardiovascular responses and thermal sensation during hot-water bathing and the influence of room temperature
Publication date: Available online 26 March 2019Source: Journal of Thermal BiologyAuthor(s): Yuta Masuda, Shuri Marui, Issei Kato, Mayuka Fujiki, Mariko Nakada, Kei NagashimaAbstractThe aim of the present study was to clarify physical risks during hot-water bathing by measuring thermal and cardiovascular responses and thermal perception. Young men and women (n = 7 and 5, respectively) participated in the present study, which consisted of two trials mimicking bathing behavior at room temperature of 25 °C and 15 °C. Participants bathed in 41 °C water for 20 min to the subclavian level. Before bathing,...
Source: Journal of Thermal Biology - March 27, 2019 Category: Biology Source Type: research

Revisiting the dermatomal recruitment of, and pressure-dependent influences on, human eccrine sweating
Publication date: Available online 22 March 2019Source: Journal of Thermal BiologyAuthor(s): Remo Frei, Sean R. Notley, Elizabeth A. Taylor, Catriona A. Burdon, Norikazu Ohnishi, Nigel A.S. TaylorAbstractHerein we describe two experiments in which the recruitment and pressure-induced modifications of human eccrine sweating were investigated. In one experiment, the longstanding belief that glandular recruitment follows a gradual, caudal-to-rostral (dermatomal) recruitment pattern was re-evaluated. The onset of sweating was simultaneously determined (ventilated capsules) from four spinal (dermatomal) segments (forehead, dors...
Source: Journal of Thermal Biology - March 23, 2019 Category: Biology Source Type: research

Protective effect of resveratrol against hepatic damage induced by heat stress in a rat model is associated with the regulation of oxidative stress and inflammation
Publication date: Available online 21 March 2019Source: Journal of Thermal BiologyAuthor(s): Kang Cheng, Enfa Yan, Zhihua Song, Simian Li, Hao Zhang, Lili Zhang, Chao Wang, Tian WangAbstractHeat stress jeopardizes humans and animals health, and results in enormous economic loss in public health care and livestock production. The aim of this study was to investigate the effects of resveratrol on hepatic oxidative stress and inflammation in heat-stressed rats. Male Sprague-Dawley rats were orally fed with 100 mg resveratrol/kg body weight/day prior to heat stress (40 ∘C per day for 1.5 h) exposure for 3 consecutive day...
Source: Journal of Thermal Biology - March 22, 2019 Category: Biology Source Type: research

Baicalin protects mouse testis from injury induced by heat stress
The objectives of this study were to evaluate protective effects of baicalin on testicular tissue damage of mice subjected to heat stress and its related mechanisms. In this experiment, A total of forty mice were divided into four groups, including control group (C), baicalin group (B), heat stressed group (H) and heat stress with baicalin treatment (H + B) group. Morphological changes, activities of antioxidant enzymes and apoptosis-related parameters in the mice testes tissue were monitored. The results showed that the process of spermatogenesis in mice testis was impaired and the cellular apoptosis increased d...
Source: Journal of Thermal Biology - March 22, 2019 Category: Biology Source Type: research

Attributable risk of mortality associated with heat and heat waves: A time-series study in Kerman, Iran during 2005–2017
In this study we aimed to assess the effect of heat and heat waves on mortality using attributable risks during 2005–2017. Nine heat waves were defined using a combination of severity and duration of mean daily temperature. Heat wave effects were assessed using added and main effects. Added effects were assessed as a binary variable and main effects were assessed by comparing the median temperature (in heat wave days) to Minimum Mortality Temperature (MMT). The effects of heat, mild heat and extreme heat on mortality were also assessed. Distributed Lag Non-linear Models were used to assess the relations in a bi-dimen...
Source: Journal of Thermal Biology - March 22, 2019 Category: Biology Source Type: research

Interactive effects of experimental heating rates, ontogeny and body mass on the upper thermal limits of anuran larvae
Publication date: Available online 22 March 2019Source: Journal of Thermal BiologyAuthor(s): Gustavo A. Agudelo-Cantero, Carlos A. NavasAbstractBiological and methodological factors influence the upper thermal limits (UTL) of ectothermic animals, but most factors have been studied independently. Few studies have integrated variables, so our understanding about sources of UTL variation remains fragmentary. Thereby, we investigated synergic effects of experimental protocols (heating rates, ΔTs) and biological factors (ontogeny and body mass) on the UTL on the larvae of two anuran species (Physalaemus nattereri and Boan...
Source: Journal of Thermal Biology - March 22, 2019 Category: Biology Source Type: research

Cow individual activity response to the accumulation of heat load duration
The objective of this study was to investigate the cow individual activity response to heat load in terms of the heat load duration and intensity in lactating, high-yielding Holstein-Friesian cows in a moderate climate zone.The study was conducted from June 2015 to April 2017 in a naturally ventilated barn in Brandenburg, Germany. The determined temperature-humidity index (THI) inside the barn was used to define the heat load. The heat load was characterized by the average daily THI as well as the duration and intensity of the defined THI levels. In addition to the heat load on the measurement day, we studied the cow indiv...
Source: Journal of Thermal Biology - March 22, 2019 Category: Biology Source Type: research

Genome-wide association study on the body temperature changes of a broiler-type strain Taiwan country chickens under acute heat stress
In conclusion, the significant SNPs located in and proximal to genes in the GWAS analysis were related to apoptosis or responses to external stimuli which serve as potential candidates underlying physiological adaptation to heat stress or thermotolerance in chickens. (Source: Journal of Thermal Biology)
Source: Journal of Thermal Biology - March 21, 2019 Category: Biology Source Type: research

The effect of body posture on available habitat and activity-time in a lizard: Implications for thermal ecology studies
Publication date: Available online 16 March 2019Source: Journal of Thermal BiologyAuthor(s): Casey L. Brewster, Steven J. BeaupreAbstractEctothermic animals contend with variable environmental temperature through behavioral thermoregulation, including selection of activity-times and microhabitat spaces with suitable operative temperatures. Thus, an important component to understanding the influence of temperature on animals is through the assessment of thermal constraints on time and space usage. Thermal ecologists have recognized that postural adjustments are an important part of behavioral thermoregulation. However, the ...
Source: Journal of Thermal Biology - March 18, 2019 Category: Biology Source Type: research

Heat tolerance of Fire Service Instructors
This study aimed to establish whether FSI exhibit an increased heat tolerance and altered immunological response to heat exposures, compared to non-exposed individuals. The study also aimed to identify if heat tolerance is related to symptoms of ill health.MethodsTwenty-two participants were recruited: 11 FSI (age: 41 ± 7 yrs, body mass: 77.4 ± 12.2 kg, height: 174.1 ± 8.2 cm) and 11 non-exposed controls (CON) (age: 41 ± 7 yrs, body mass: 75.9 ± 12.2 kg, height: 177.0 ± 8.1 cm). Participants completed a 40 min heat occupational tolerance test (...
Source: Journal of Thermal Biology - March 16, 2019 Category: Biology Source Type: research

Measurement of human body surface heat flux using a calorimetric sensor
Publication date: April 2019Source: Journal of Thermal Biology, Volume 81Author(s): Pedro Jesús Rodríguez de Rivera, Miriam Rodríguez de Rivera, Fabiola Socorro, Manuel Rodríguez de RiveraAbstractWe have developed a calorimetric sensor that can perform local measurements of the heat flux transmitted by conduction between a human body and thermostat located inside the sensor. The sensor has a detection area of 2 × 2 cm2 and, in its current configuration, facilitates measurement with a resolution of 10 mW. In this paper, measurements of two healthy male subjects of different ages (24...
Source: Journal of Thermal Biology - March 13, 2019 Category: Biology Source Type: research

Air movement affects insulatory values of nests constructed by Old World warblers
This study investigated the insulation of nests constructed by three species of Old Word warblers (Sylviidae), which vary in size and composition. Insulatory values, i.e. difference in cooling rate of temperature loggers placed inside and outside a nest, and internal cooling rates within the nest cup were determined using temperature loggers under still-air and moving-air conditions. Insulatory values determined in still-air conditions of a laboratory were significantly different among nests of the different species but not when the values were determined within the smaller volume of a wind tunnel. Moving-air increased ins...
Source: Journal of Thermal Biology - March 10, 2019 Category: Biology Source Type: research

Quantifying body surface temperature differences in canine coat types using infrared thermography
Publication date: Available online 8 March 2019Source: Journal of Thermal BiologyAuthor(s): Claire Kwon, Cord BrundageAbstractInfrared thermography (IRT) has been used to assess the health of canines by measuring surface temperatures. However, little is known about the effect hair coat differences has on expected surface temperature in healthy canines under the influence of hair coat differences. The aim of this study was to identify the influence of coat characteristics in body surface temperature (BST) in canines (Canis lupus familiaris). To determine the changes in BST, an infrared thermal imaging camera (i.e. FLIR B400...
Source: Journal of Thermal Biology - March 10, 2019 Category: Biology Source Type: research

Obituary: Professor Kenneth Bowler (1934–2019)
Publication date: Available online 7 March 2019Source: Journal of Thermal BiologyAuthor(s): Andrew Cossins (Source: Journal of Thermal Biology)
Source: Journal of Thermal Biology - March 8, 2019 Category: Biology Source Type: research

Bats are not squirrels: revisiting the cost of cooling in hibernating mammals
Publication date: Available online 6 March 2019Source: Journal of Thermal BiologyAuthor(s): Catherine G. Haase, Nathan W. Fuller, C. Reed Hranac, David T.S. Hayman, Sarah H. Olson, Raina K. Plowright, Liam P. McGuireAbstractMany species use stored energy to hibernate through periods of resource limitation. Hibernation, a physiological state characterized by depressed metabolism and body temperature, is critical to winter survival and reproduction, and therefore has been extensively quantified and modeled. Hibernation consists of alternating phases of extended periods of torpor (low body temperature, low metabolic rate), an...
Source: Journal of Thermal Biology - March 8, 2019 Category: Biology Source Type: research

Numerical Analysis of an enhanced cooling rate Cryopreservation process in a biological tissue
Publication date: Available online 5 March 2019Source: Journal of Thermal BiologyAuthor(s): S. Sukumar, S.P. KarAbstractCryopreservation is the method of preservation of biological tissues for future references without causing significant damages to their physical and functional properties. This can be done by exposing them to very low cryogenic temperature that involves a greater heat removal rate. A two dimensional numerical model is developed to study the temperature distribution, cooling rate attained and movement of the freezing front during the cryopreservation process. The Pennes Bio-heat model is used for current s...
Source: Journal of Thermal Biology - March 6, 2019 Category: Biology Source Type: research

The dynamic adaptation of Brazilian Brahman bulls
Publication date: April 2019Source: Journal of Thermal Biology, Volume 81Author(s): Débora Andréa E. Façanha, Josiel B. Ferreira, Jacinara Hody G. Morais Leite, José Ernandes R. de Sousa, Magda M. Guilhermino, Wirton P. Costa, Luis A. Bermejo Asensio, Angela Maria de Vasconcelos, Robson Mateus F. SilveiraAbstractHeat stress is one of the most important factors that affect the performance of some Bos taurus breeds and crosses in tropical regions. The Brahman breed was developed in hot regions of the world and often has genes that confer resistance to heat stress compared to other breeds of beef c...
Source: Journal of Thermal Biology - March 6, 2019 Category: Biology Source Type: research

Thermal sensitivity and haemolysis of erythrocytes with membranopathy
In this study erythrocytes from 9 healthy patients and 15 patients with hemolytic anemia were studied and divided into four groups depending on their TA and TG top temperatures. The TA and TG of erythrocytes with hemoglobinopathy were the same as those of control erythrocytes while those of erythrocytes with membranopathy were significantly reduced. In erythrocytes with severe membranopathy, the TG was decreased by about 5 °C. In latter cells the normal value of TG was restored and the resistance to thermal haemolysis was increased by 90% after the specific stabilization of band 3 protein by 4,4′-diisothiocyana...
Source: Journal of Thermal Biology - March 4, 2019 Category: Biology Source Type: research

Chronic heat stress alters hypothalamus integrity, the serum indexes and attenuates expressions of hypothalamic appetite genes in broilers
In conclusion, HS increased the surface temperature of head in broiler, and then altered the integrity of hypothalamus. Meanwhile, HS increased the serum corticosterone which may ascribe to the activation of HPA axis in the broilers. In addition, chronic heat stress decreased the expression of orexigenic gene NPY, which may cause the broiler to reduce feed intake. (Source: Journal of Thermal Biology)
Source: Journal of Thermal Biology - March 1, 2019 Category: Biology Source Type: research

Measurement of the human body surface heat flux using a calorimetric sensor
Publication date: Available online 28 February 2019Source: Journal of Thermal BiologyAuthor(s): Pedro Jesús Rodríguez de Rivera, Miriam Rodríguez de Rivera, Fabiola Socorro, Manuel Rodriguez de RiveraAbstractWe have developed a calorimetric sensor that can perform a local measurement of the heat flux transmitted by conduction between the human body and a thermostat located inside the sensor. This sensor has a detection area of 2×2 cm2 and, in its current configuration, allows to measure with a resolution of 10 mW. In this work, measurements on two healthy male subjects of different ages (24 ...
Source: Journal of Thermal Biology - March 1, 2019 Category: Biology Source Type: research

Effect of the valine-to-lysine ratio on the performance of sows and piglets in a hot, humid environment
In conclusion, in a hot, humid environment, dietary valine could improve the performance of sows and piglets by increasing colostrum lactose and serum immunoglobulin concentration in piglets and by influencing serum glucose in sows. (Source: Journal of Thermal Biology)
Source: Journal of Thermal Biology - February 28, 2019 Category: Biology Source Type: research

Thermoprotective properties of Opuntia ficus-indica f. inermis cladodes and mesocarps on sheep lymphocytes
This study aims to investigate the thermoprotective properties of Opuntia ficus-indica f. inermis. Extracts were prepared from cladodes (CE) and mesocarps (ME), then subjected to a spectrophotometric and LC-MS analyses. Lymphocytes were isolated from peripheral blood of non-stressed sheep, supplemented with CE, ME, betanin or α-tocopherol, and subjected to two thermal treatments: 40 and 41 °C, for 6 h. Viable lymphocytes and H2O2 production were evaluated.The antioxidant activity of ME was 3.43 folds higher than CE. The LC-MS analysis of CE and ME allowed identifying 11 phenolic acids, 2 flavanones, 6 f...
Source: Journal of Thermal Biology - February 28, 2019 Category: Biology Source Type: research

Multigenerational heat acclimation increases thermal tolerance and expression levels of Hsp70 and Hsp90 in the rice leaf folder larvae
Publication date: Available online 28 February 2019Source: Journal of Thermal BiologyAuthor(s): Ling-Ling Gu, Ming-Zhu Li, Gao-Rong Wang, Xiang-Dong LiuAbstractPhysiological response and acclimation to thermal stress is a key strategy of insects to cope with changing climate. The underlying mechanism of heat acclimation in insects is still unclear. Here, the heat selection and transcript level response in the larvae of the rice leaf folder Cnaphalocrocis medinalis Güenée, a serious pest of rice in summer, were studied. The survival and fecundity of larvae during multigenerational heat selection at 39 °...
Source: Journal of Thermal Biology - February 28, 2019 Category: Biology Source Type: research

Thermal Niche Adaptations of Common Mudskipper (Periophthalmus kalolo) and Barred Mudskipper (Periophthalmus argentilineatus) in Air and Water
Publication date: Available online 28 February 2019Source: Journal of Thermal BiologyAuthor(s): Theresa F. Dabruzzi, Nann A. Fangue, Nadiarti N. Kadir, Wayne A. BennettAbstractThermal tolerance niche analyses have been used extensively to identify adaptive thermal tactics used by wholly aquatic fishes, however no study to date has quantified thermal niche characteristics of air-breathing fishes. We use standardized thermal methodologies to estimate temperature acclimation ranges, upper and lower acclimation response ratios, and thermal niche areas in common (Periophthalmus kalolo) and barred (Periophthalmus argentilineatus...
Source: Journal of Thermal Biology - February 28, 2019 Category: Biology Source Type: research

Thermal sensitivity and hemolysis of erythrocytes with membranopathy
In this study erythrocytes from 9 healthy patients and 15 patients with haemolytic anemia were studied and divided into four groups depending on their TA and TG top temperatures. The TA and TG of erythrocytes with hemoglobinopathy were the same as those of control erythrocytes while those of erythrocytes with membranopathy were significantly reduced. In erythrocytes with severe membranopathy, the TG was decreased by about 5 °C. In latter cells the normal value of TG was restored and the resistance to thermal haemolysis was increased by 90% after the specific stabilization of band 3 protein by 4,4′-diisothioc...
Source: Journal of Thermal Biology - February 27, 2019 Category: Biology Source Type: research

Heat tolerance responses in a Bos Taurus cattle herd raised in a Brazilian climate
The objectives were to verify the morphological and physiological responses related to adaptation to heat of taurine breeds raised under in Brazilian meteorological conditions in different seasons of the year and day periods, and to detect differences within and between breeds to know breed is most adapted. Measurements were made of 74 young bulls (n = 31 Angus; n = 43 Simmental) for the morphological traits: hair length (HL), number of hairs (NH), and coat thickness (CT); and for the physiological traits: respiratory rate (RR) and hair coat surface temperature (ST). The temperature-humidity index (THI) was calculated. The...
Source: Journal of Thermal Biology - February 27, 2019 Category: Biology Source Type: research

The impact of hair coat color on physiological variables, reproductive performance and milk yield of Holstein cows in a hot environment
Publication date: Available online 27 February 2019Source: Journal of Thermal BiologyAuthor(s): F. Anzures-Olvera, F.G. Véliz, A. de Santiago, J.E. García, J. Mellado, U. Macías-Cruz, L. Avendaño-Reyes, M. MelladoAbstractVulnerable animals to heat stress have been described as ones with dark or black hides due to increasing absorption of solar radiation. The effect of coat color in pluriparous contemporary Holstein cows in a hot environment (mean annual temperature 24.6 °C), on body surface temperature (infrared thermography), physiological and hematological variables as well as milk yi...
Source: Journal of Thermal Biology - February 27, 2019 Category: Biology Source Type: research

Native amphibian larvae exhibit higher upper thermal limits but lower performance than their introduced predator Gambusia affinis
Publication date: Available online 25 February 2019Source: Journal of Thermal BiologyAuthor(s): Edward Tak Chuen Lau, Kenneth Mei Yee Leung, Nancy Elizabeth KarrakerAbstractInformation on the thermal limits and physiology of ectothermic amphibians is crucial to our understanding of their ecology in the natural environment, particularly with predicted global changes in climate. We documented the thermal limits of larvae of three amphibian species native to Hong Kong, and their introduced, invasive predator, the mosquitofish (Gambusia affinis). We then used larvae of the brown tree frog Polypedates megacephalus as a model am...
Source: Journal of Thermal Biology - February 26, 2019 Category: Biology Source Type: research

The dynamic adaptation of Brahman steers in a savanna biome
Publication date: Available online 25 February 2019Source: Journal of Thermal BiologyAuthor(s): Débora Andréa E. Façanha, Josiel B. Ferreira, Jacinara Hody G. Morais Leite, José Ernandes R. da Sousa, Magda M. Guilhermino, Wirton P. Costa, Luis A. Bermejo Asensio, Angela Maria de Vasconcelos, Robson Mateus F. SilveiraAbstractHeat stress is one of the most important factors that affect the performance of some Bos taurus breeds and crosses in tropical regions. The Brahman breed was developed in hot regions of the world and often has genes that confer resistance to heat stress compared to other bree...
Source: Journal of Thermal Biology - February 26, 2019 Category: Biology Source Type: research

The key local segments of human body for personalized heating and cooling
Publication date: Available online 23 February 2019Source: Journal of Thermal BiologyAuthor(s): Lijuan Wang, Yufei Tian, Jungsoo Kim, Haiguo YinAbstractThermal characteristics of local body parts of a human subject are markedly different in cold or hot environments. Some body segments are known to be much more susceptible to heat loss than the others, thus strongly influencing the overall thermal sensation of a subject. If these body parts can be effectively cooled in a hot environment or warmed in a cold environment using personal environmental control systems, thermal comfort of human occupants can be achieved at the min...
Source: Journal of Thermal Biology - February 25, 2019 Category: Biology Source Type: research

Brown adipose tissue plays thermoregulatory role within the thermoneutral zone in Mongolian gerbils (Meriones unguiculatus)
In conclusion, BAT does not atrophy near the lower critical temperature, whereas it atrophies near the upper critical temperature, suggesting that BAT may play thermoregulatory role within the TNZ in Mongolian gerbils. (Source: Journal of Thermal Biology)
Source: Journal of Thermal Biology - February 25, 2019 Category: Biology Source Type: research