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https://www.readbyqxmd.com/read/28646532/acquired-bilateral-telangiectasia-macularis-eruptiva-perstans-a-unique-clinical-feature-of-photodamaging-rather-than-a-subtype-of-cutaneous-mastocytosis
#1
Hye-Rim Moon, Young Jae Kim, Joon Min Jung, Chong Hyun Won, Mi Woo Lee, Jee Ho Choi, Sung Eun Chang
Telangiectasia macularis eruptiva perstans (TMEP) is a rare subtype of cutaneous mastocytosis, characterized by telangiectatic tan to brown macules on the trunk and extremities. Although TMEP has been descried as an uncommon disease in the literature, we often encounter patients with TMEP lesions in the outpatient clinic. We aimed to assess the clinical and histopathological characteristics of acquired bilateral TMEP, and the pathophysiological mechanism of acquired bilateral TMEP among these patients. We retrospectively reviewed 30 patients (28 men and 2 women) with acquired bilateral TMEP; multiple telangiectatic dark red to brown macules that were symmetrically distributed...
June 23, 2017: Journal of Dermatology
https://www.readbyqxmd.com/read/28644983/future-heat-waves-due-to-climate-change-threaten-the-survival-of-p-%C3%A2-oceanica-seedlings
#2
Laura Guerrero-Meseguer, Arnaldo Marín, Carlos Sanz-Lázaro
Extreme weather events are major drivers of ecological change, and their occurrence is likely to increase due to climate change. The transient increases in atmospheric temperatures are leading to a greater occurrence of heat waves, extreme events that can produce a substantial warming of water, especially in enclosed basins such as the Mediterranean Sea. Here, we tested the effects of current and predicted heat waves on the early stages of development of the seagrass Posidonia oceanica. Temperatures above 27 °C limited the growth of the plant by inhibiting its photosynthetic system...
June 20, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28640271/a-massive-dead-disk-galaxy-in-the-early-universe
#3
Sune Toft, Johannes Zabl, Johan Richard, Anna Gallazzi, Stefano Zibetti, Moire Prescott, Claudio Grillo, Allison W S Man, Nicholas Y Lee, Carlos Gómez-Guijarro, Mikkel Stockmann, Georgios Magdis, Charles L Steinhardt
At redshift z = 2, when the Universe was just three billion years old, half of the most massive galaxies were extremely compact and had already exhausted their fuel for star formation. It is believed that they were formed in intense nuclear starbursts and that they ultimately grew into the most massive local elliptical galaxies seen today, through mergers with minor companions, but validating this picture requires higher-resolution observations of their centres than is currently possible. Magnification from gravitational lensing offers an opportunity to resolve the inner regions of galaxies...
June 21, 2017: Nature
https://www.readbyqxmd.com/read/28637217/experimental-support-that-natural-selection-has-shaped-the-latitudinal-distribution-of-mitochondrial-haplotypes-in-australian-drosophila-melanogaster
#4
M Florencia Camus, Jonci N Wolff, Carla M Sgrò, Damian K Dowling
Cellular metabolism is regulated by enzyme complexes within the mitochondrion, the function of which are sensitive to the prevailing temperature. Such thermal sensitivity, coupled with the observation that population frequencies of mitochondrial haplotypes tend to associate with latitude, altitude or climatic regions across species distributions, led to the hypothesis that thermal selection has played a role in shaping standing variation in the mitochondrial DNA (mtDNA) sequence. This hypothesis, however, remains controversial, and requires evidence that the distribution of haplotypes observed in nature corresponds with the capacity of these haplotypes to confer differences in thermal tolerance...
June 20, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/28635174/flash-light-millisecond-self-assembly-of-high-%C3%AF-block-copolymers-for-wafer-scale-sub-10-nm-nanopatterning
#5
Hyeong Min Jin, Dae Yong Park, Seong-Jun Jeong, Gil Yong Lee, Ju Young Kim, Jeong Ho Mun, Seung Keun Cha, Joonwon Lim, Jun Soo Kim, Kwang Ho Kim, Keon Jae Lee, Sang Ouk Kim
One of the fundamental challenges encountered in successful incorporation of directed self-assembly in sub-10 nm scale practical nanolithography is the process compatibility of block copolymers with a high Flory-Huggins interaction parameter (χ). Herein, reliable, fab-compatible, and ultrafast directed self-assembly of high-χ block copolymers is achieved with intense flash light. The instantaneous heating/quenching process over an extremely high temperature (over 600 °C) by flash light irradiation enables large grain growth of sub-10 nm scale self-assembled nanopatterns without thermal degradation or dewetting in a millisecond time scale...
June 21, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28630921/increasing-probability-of-mortality-during-indian-heat-waves
#6
Omid Mazdiyasni, Amir AghaKouchak, Steven J Davis, Shahrbanou Madadgar, Ali Mehran, Elisa Ragno, Mojtaba Sadegh, Ashmita Sengupta, Subimal Ghosh, C T Dhanya, Mohsen Niknejad
Rising global temperatures are causing increases in the frequency and severity of extreme climatic events, such as floods, droughts, and heat waves. We analyze changes in summer temperatures, the frequency, severity, and duration of heat waves, and heat-related mortality in India between 1960 and 2009 using data from the India Meteorological Department. Mean temperatures across India have risen by more than 0.5°C over this period, with statistically significant increases in heat waves. Using a novel probabilistic model, we further show that the increase in summer mean temperatures in India over this period corresponds to a 146% increase in the probability of heat-related mortality events of more than 100 people...
June 2017: Science Advances
https://www.readbyqxmd.com/read/28630407/colony-adaptive-response-to-simulated-heat-waves-and-consequences-at-the-individual-level-in-honeybees-apis-mellifera
#7
Célia Bordier, Hélène Dechatre, Séverine Suchail, Mathilde Peruzzi, Samuel Soubeyrand, Maryline Pioz, Michel Pélissier, Didier Crauser, Yves Le Conte, Cédric Alaux
Since climate change is expected to bring more severe and frequent extreme weather events such as heat waves, assessing the physiological and behavioural sensitivity of organisms to temperature becomes a priority. We therefore investigated the responses of honeybees, an important insect pollinator, to simulated heat waves (SHW). Honeybees are known to maintain strict brood thermoregulation, but the consequences at the colony and individual levels remain poorly understood. For the first time, we quantified and modelled colony real-time activity and found a 70% increase in foraging activity with SHW, which was likely due to the recruitment of previously inactive bees...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28628029/thermopower-and-thermal-conductivity-in-the-weyl-semimetal-nbp
#8
Ulrike Stockert, Ricardo Donizeth Dos Reis, M O Ajeesh, Sarah J Watzman, Marcus Schmidt, Chandra Shekhar, Joseph P Heremans, Claudia Felser, Michael Baenitz, Michael Nicklas
The Weyl semimetal NbP exhibits an extremely large magnetoresistance (MR) and an ultra-high mobility. The large MR originates from a combination of the nearly perfect compensation between electron- and hole-type charge carriers and the high mobility, which is relevant to the topological band structure. In this work we report on temperature- and field-dependent thermopower and thermal conductivity experiments on NbP. Additionally, we carried out complementary heat capacity, magnetization, and electrical resistivity measurements...
June 19, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28619023/potential-for-adaptation-to-climate-change-family-level-variation-in-fitness-related-traits-and-their-responses-to-heat-waves-in-a-snail-population
#9
Katja Leicht, Katri Seppälä, Otto Seppälä
BACKGROUND: On-going global climate change poses a serious threat for natural populations unless they are able to evolutionarily adapt to changing environmental conditions (e.g. increasing average temperatures, occurrence of extreme weather events). A prerequisite for evolutionary change is within-population heritable genetic variation in traits subject to selection. In relation to climate change, mainly phenological traits as well as heat and desiccation resistance have been examined for such variation...
June 15, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28616256/extremely-cost-effective-and-efficient-solar-vapor-generation-under-nonconcentrated-illumination-using-thermally-isolated-black-paper
#10
Zhejun Liu, Haomin Song, Dengxin Ji, Chenyu Li, Alec Cheney, Youhai Liu, Nan Zhang, Xie Zeng, Borui Chen, Jun Gao, Yuesheng Li, Xiang Liu, Diana Aga, Suhua Jiang, Zongfu Yu, Qiaoqiang Gan
Passive solar vapor generation represents a promising and environmentally benign method of water purification/desalination. However, conventional solar steam generation techniques usually rely on costly and cumbersome optical concentration systems and have relatively low efficiency due to bulk heating of the entire liquid volume. Here, an efficient strategy using extremely low-cost materials, i.e., carbon black (powder), hydrophilic porous paper, and expanded polystyrene foam is reported. Due to the excellent thermal insulation between the surface liquid and the bulk volume of the water and the suppressed radiative and convective losses from the absorber surface to the adjacent heated vapor, a record thermal efficiency of ≈88% is obtained under 1 sun without concentration, corresponding to the evaporation rate of 1...
February 27, 2017: Global Chall
https://www.readbyqxmd.com/read/28612619/-isolated-perfusion-of-the-upper-extremity-with-tnf-%C3%AE-double-venous-cannulation
#11
M Špaček, P Mitáš, M Vočka, L Lacina, G Hodková, R Špunda, O Kodet, I Krajsová, L Petruželka, J Trnka, J Kubinyi, Z Matějovský, L Lambert, J Lindner
BACKGROUND: The authors present a technical variation of the standard cannulation for cardiopulmonary bypass perfusion during hyperthermic isolated limb perfusion (ILP) procedures in selected patients with unresectable soft tissue sarcoma or malignant melanoma. PATIENTS: Of 55 ILP procedures performed at our institution since the procedure was established in 2009, nine were performed at the upper extremity. Standard single venous cannulation was used in five cases, and extended, double venous cannulation in the last four...
2017: Klinická Onkologie: Casopis Ceské a Slovenské Onkologické Spolecnosti
https://www.readbyqxmd.com/read/28610960/no-difference-between-noxious-and-innocuous-thermal-stimulation-on-motor-recovery-of-upper-extremity-in-patients-with-acute-stroke-a-randomized-controlled-trial-with-6-month-follow-up
#12
Roxane Lin, Miao-Ju Hsu, Ruey-Tay Lin, Mao-Hsiung Huang, Chia-Lin Koh, Ching-Lin Hsieh, Jau-Hong Lin
BACKGROUND: Thermal stimulation (TS) have been developed and incorporated in stroke rehabilitation. However, whether noxious and innocuous TS induce the same effects on motor function recovery after stroke is still unknown. A comparative study of different temperature combination regimens is needed. OBJECTIVE: To compare the short and long-term effectiveness between noxious and innocuous TS on motor recovery of upper extremity in patients with acute stroke. DESIGN: Randomised, controlled trial with concealed allocation, intention-to-treat analysis and blinded outcome assessors...
June 10, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/28609330/age-modulates-physiological-responses-during-fan-use-under-extreme-heat-and-humidity
#13
Daniel Gagnon, Steven A Romero, Matthew N Cramer, Ken Kouda, Paula Ys Poh, Hai Ngo, Ollie Jay, Craig G Crandall
PURPOSE: We examined the effect of electric fan use on cardiovascular and thermoregulatory responses of nine young (26 ± 3 years) and nine aged (68 ± 4 years) adults exposed to extreme heat and humidity. METHODS: While resting at a temperature of 42°C, relative humidity increased from 30 to 70% in 2% increments every 5 minutes. On randomized days, the protocol was repeated without or with fan use. Heart rate (HR), core (Tcore) and mean skin (Tsk) temperatures were measured continuously...
June 12, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28608830/a-simple-defined-medium-for-the-production-of-true-diketopiperazines-in-xylella-fastidiosa-and-their-identification-by-ultra-fast-liquid-chromatography-electrospray-ionization-ion-trap-mass-spectrometry
#14
Michelli Massaroli da Silva, Moacir Dos Santos Andrade, Anelize Bauermeister, Marcus Vinícius Merfa, Moacir Rossi Forim, João Batista Fernandes, Paulo Cezar Vieira, Maria Fátima das Graças Fernandes da Silva, Norberto Peporine Lopes, Marcos Antônio Machado, Alessandra Alves de Souza
Diketopiperazines can be generated by non-enzymatic cyclization of linear dipeptides at extreme temperature or pH, and the complex medium used to culture bacteria and fungi including phytone peptone and trypticase peptone, can also produce cyclic peptides by heat sterilization. As a result, it is not always clear if many diketopiperazines reported in the literature are artifacts formed by the different complex media used in microorganism growth. An ideal method for analysis of these compounds should identify whether they are either synthesized de novo from the products of primary metabolism and deliver true diketopiperazines...
June 13, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28606202/an-assessment-of-climate-change-impacts-on-los-angeles-california-usa-hospitals-wildfires-highest-priority
#15
Sabrina A Adelaine, Mizuki Sato, Yufang Jin, Hilary Godwin
Introduction Although many studies have delineated the variety and magnitude of impacts that climate change is likely to have on health, very little is known about how well hospitals are poised to respond to these impacts. Hypothesis/Problem The hypothesis is that most modern hospitals in urban areas in the United States need to augment their current disaster planning to include climate-related impacts. METHODS: Using Los Angeles County (California USA) as a case study, historical data for emergency department (ED) visits and projections for extreme-heat events were used to determine how much climate change is likely to increase ED visits by mid-century for each hospital...
June 13, 2017: Prehospital and Disaster Medicine
https://www.readbyqxmd.com/read/28601146/genetic-component-of-sensitivity-to-heat-stress-for-nonreturn-rate-of-brazilian-holstein-cattle
#16
M L Santana, A B Bignardi, G Stefani, L El Faro
The objectives of the present study were: 1) to investigate variation in the genetic component of heat stress for nonreturn rate at 56 days after first artificial insemination (NR56); 2) to identify and characterize the genotype by environment interaction (G × E) due to heat stress for NR56 of Brazilian Holstein cattle. A linear random regression model (reaction norm model) was applied to 51,748 NR56 records of 28,595 heifers and multiparous cows. The decline in NR56 due to heat stress was more pronounced in milking cows compared to heifers...
August 2017: Theriogenology
https://www.readbyqxmd.com/read/28599264/time-series-analysis-of-heat-waves-and-emergency-department-visits-in-atlanta-1993-to-2012
#17
(no author information available yet)
BACKGROUND: Heat waves are extreme weather events that have been associated with adverse health outcomes. However, there is limited knowledge of heat waves' impact on population morbidity, such as emergency department (ED) visits. OBJECTIVES: We investigated associations between heat waves and ED visits for 17 outcomes in Atlanta over a 20-year period, 1993-2012. METHODS: Associations were estimated using Poisson log-linear models controlling for continuous air temperature, dew-point temperature, day of week, holidays, and time trends...
May 31, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28598477/revealing-the-slow-decomposition-kinetics-of-type-i-clathrate-ba8ga16ge30
#18
Hazel Reardon, Anders B Blichfeld, Hidetaka Kasai, Hao Yin, Espen Drath Bøjesen, Bo B Iversen
Inconsistencies in high temperature thermoelectric property measurements of Ba8Ga16Ge30 have prompted our study on the thermal stability of this heavily studied inorganic clathrate. Using X-ray diffraction, thermal analysis, and imaging techniques on both powder and spark plasma sintered pelletized samples, we probe the structure and decomposition characteristics of this important high temperature thermoelectric material. We demonstrate that the decomposition of Ba8Ga16Ge30 is extremely dependent on the heating conditions employed and, as a result of the slow decomposition kinetics of the clathrate, reveal that the true stability of this system has been overlooked in the extensive literature available...
June 21, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28593454/permanent-cerebellar-degeneration-after-acute-hyperthermia-with-non-toxic-lithium-levels-a-case-report-and-review-of-literature
#19
REVIEW
Fabian H Rossi, Elisa Marie Rossi, Michael Hoffmann, Welwin Liu, Ramon Rodriguez Cruz, Natasha Antonovich, Arash Rezaei, Elizabeth Gonzalez, Maria Clara Franco, Alvaro Estevez, Florian Thomas
This was a study of a 33-year-old man with bipolar disorder treated with lithium who developed cerebellar atrophy after an event of extreme hyperthermia. Unlike previously reported cases of acute cerebellar atrophy after heat stroke, neuroleptic syndrome or lithium toxicity, this case was characterized by a chronic cerebellar atrophy that developed after sepsis-induced hyperthermia in the setting of non-toxic lithium levels. Unique to this case also was the early finding of cerebellar atrophy on MRI 2 weeks after the episode of hyperthermia, long-term neurotoxicity after the novo lithium therapy, and longest follow-up case of chronic cerebellar syndrome after hyperthermia with non-toxic lithium levels...
June 8, 2017: Cerebellum
https://www.readbyqxmd.com/read/28591871/-relevance-of-heat-health-actions-plans-for-preventive-public-health-in-germany
#20
Birgit Zielo, Andreas Matzarakis
Background Heat waves are among the extreme weather events and represent a growing health hazard for the population in Europe. According to the current climate studies, the probability of an increase and intensification of heat waves has been increasing for years. Particularly affected by exposure to unusually high heat are people whose organism is already weakened by age or illness. As the share of senior citizens in Germany continues to rise as a result of demographic change, the health effects of heat waves are gaining in importance...
June 7, 2017: Das Gesundheitswesen
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