keyword
https://read.qxmd.com/read/38509715/physiological-and-perceptual-responses-to-temperature-step-changes-between-cold-and-hot-environments
#21
JOURNAL ARTICLE
Qianqian Huang, Jian Li, Jun Li
Objectives. This study explores the effects of temperature steps on thermal responses to understand abrupt temperature shifts faced by heat-exposed workers during winter. Methods. Three temperature step changes with three phases (S20: 20-40-20 °C, S30: 10-40-10 °C, S40: 0-40-0 °C) were conducted. Phase 1 took 30 min, phase 2 took 60 min and phase 3 took 40 min. Eleven participants remained sedentary throughout the experiment, and physiological responses, thermal perception and self-reported health symptoms were recorded...
March 20, 2024: International Journal of Occupational Safety and Ergonomics: JOSE
https://read.qxmd.com/read/38509399/the-effects-of-brightness-and-prominent-colors-on-outdoor-thermal-perception-in-chongqing-china
#22
JOURNAL ARTICLE
Hongqiao Qin, Jianghua Chen, Jiaqi Niu, Jingeng Huo, Xuelin Wei, Jie Yan, Guifeng Han
Outdoor thermal comfort has become an important factor affecting human mental and physical health due to rapid urbanization. This study aimed to investigate the influence of brightness and prominent colors on thermal perception in hot summer and cold winter regions. Meteorological measurements were conducted accompanied by subjective thermal and visual questionnaires (n = 2020) during summer and winter. The physiological equivalent temperature (PET) was applied as thermal indices to evaluate the influence of visual conditions on thermal perception...
March 20, 2024: International Journal of Biometeorology
https://read.qxmd.com/read/38508333/laryngeal-dysfunction-manifesting-as-chronic-refractory-cough-and-dyspnea-laryngeal-physiology-in-respiratory-health-and-disease
#23
REVIEW
Krishna M Sundar, Amanda Stark, Michael J Morris
TOPIC IMPORTANCE: Laryngeal dysfunction as a cause of chronic refractory cough (CRC) and episodic dyspnea is often missed which results in unnecessary testing and delays in diagnosis. Understanding laryngeal roles in breathing and airway protection can help to appreciate the propensity to laryngeal dysfunction with aging, chronic lung disease and sleep apnea. REVIEW FINDINGS: The human larynx is a complex muscular structure that undertakes multiple roles of breathing, vocalization, coughing and swallowing...
March 18, 2024: Chest
https://read.qxmd.com/read/38506092/naturally-segregating-genetic-variants-contribute-to-thermal-tolerance-in-a-drosophila-melanogaster-model-system
#24
JOURNAL ARTICLE
Patricka A Williams-Simon, Camille Oster, Jordyn A Moaton, Ronel Ghidey, Enoch Ng'oma, Kevin M Middleton, Elizabeth G King
Thermal tolerance is a fundamental physiological complex trait for survival in many species. For example, everyday tasks such as foraging, finding a mate, and avoiding predation, are highly dependent on how well an organism can tolerate extreme temperatures. Understanding the general architecture of the natural variants within the genes that control this trait is of high importance if we want to better comprehend thermal physiology. Here, we take a multipronged approach to further dissect the genetic architecture that controls thermal tolerance in natural populations using the Drosophila Synthetic Population Resource (DSPR) as a model system...
March 20, 2024: Genetics
https://read.qxmd.com/read/38502609/thermopcd-a-database-of-molecular-dynamics-trajectories-of-antibody-antigen-complexes-at-physiologic-and-fever-range-temperatures
#25
JOURNAL ARTICLE
Puneet K Singh, Razvan C Stan
Progression of various cancers and autoimmune diseases is associated with changes in systemic or local tissue temperatures, which may impact current therapies. The role of fever and acute inflammation-range temperatures on the stability and activity of antibodies relevant for cancers and autoimmunity is unknown. To produce molecular dynamics (MD) trajectories of immune complexes at relevant temperatures, we used the Research Collaboratory for Structural Bioinformatics (RCSB) database to identify 50 antibody:antigen complexes of interest, in addition to single antibodies and antigens, and deployed Groningen Machine for Chemical Simulations (GROMACS) to prepare and run the structures at different temperatures for 100-500 ns, in single or multiple random seeds...
March 19, 2024: Database: the Journal of Biological Databases and Curation
https://read.qxmd.com/read/38500350/variations-of-skin-thermal-diffusivity-on-different-skin-regions
#26
JOURNAL ARTICLE
Dardan Bajrami, Asier Zubiaga, Timon Renggli, Christoph Kirsch, Fabrizio Spano, Daniel Fehr, Patrick von Schulthess, Alisa Lindhorst-Peters, Stephanie Huber, Elisabeth Roider, René M Rossi, Alexander A Navarini, Mathias Bonmarin
BACKGROUND AND OBJECTIVE: Skin thermal diffusivity plays a crucial role in various applications, including laser therapy and cryogenic skin cooling.This study investigates the correlation between skin thermal diffusivity and two important skin parameters, melanin content and erythema, in a cohort of 102 participants. METHODS: An in-house developed device based on transient temperature measurement was used to assess thermal diffusivity at different body locations...
March 2024: Skin Research and Technology
https://read.qxmd.com/read/38499153/truncation-of-the-constant-domain-drives-amyloid-formation-by-immunoglobulin-light-chains
#27
JOURNAL ARTICLE
Francesca Lavatelli, Antonino Natalello, Loredana Marchese, Diletta Ami, Alessandra Corazza, Sara Raimondi, Maria Chiara Mimmi, Silvia Malinverni, P Patrizia Mangione, Manel Terrones Palmer, Alessio Lampis, Monica Concardi, Guglielmo Verona, Diana Canetti, Eloisa Arbustini, Vittorio Bellotti, Sofia Giorgetti
AL amyloidosis is a life-threatening disease caused by deposition of immunoglobulin light chains. Whilst the mechanisms underlying light chains amyloidogenesis in vivo remain unclear, several studies have highlighted the role that tissue environment and structural amyloidogenicity of individual light chains have in the disease pathogenesis. AL natural deposits contain both full-length light chains and fragments encompassing the variable domain (VL ) as well as different length segments of the constant region (CL ), thus highlighting the relevance that proteolysis may have in the fibrillogenesis pathway...
March 16, 2024: Journal of Biological Chemistry
https://read.qxmd.com/read/38498474/the-invasive-weed-trianthema-portulacastrum-in-israel
#28
JOURNAL ARTICLE
Yaakov Goldwasser, Onn Rabinowitz, Guy Achdary, Omer Kapiluto, Jackline Abu-Nasser, Evgeny Smirnov, Hanan Eizenberg
Trianthema portulacastrum L. (Aizoaceae), commonly known as desert horse purslane or black pigweed, is a C4 dicot succulent annual herb that is widespread in Southeast Asia, tropical America, Africa, and Australia. In Israel, it is an invasive weed of increasing importance in agricultural fields. The aim of this study was to investigate the biology of this invasive weed and its spread in the Hula Valley of Israel. Initial studies included the investigation of the T. portulacastrum specimens held at the Israel National Herbarium...
February 14, 2024: Plants (Basel, Switzerland)
https://read.qxmd.com/read/38495459/physicochemical-and-functional-properties-of-carboxymethylated-insoluble-dietary-fiber-of-lycium-barbarum-seed-dreg
#29
JOURNAL ARTICLE
Jian-Guo Zhang, Gang Yang, Wang-Wei Zhang, Kiran Thakur, Fei Hu, Mohammad Rizwan Khan, Zhi-Jing Ni, Zhao-Jun Wei
Lycium barbarum seed dregs (LBSDs) were used for carboxymethyl modification, resulting in three degree of substitution samples (DS). Based on the substitution degree, samples were designated as low degree of substitution insoluble dietary fiber (L-IDF), medium degree of substitution insoluble dietary fiber (M-IDF) and high degree of substitution insoluble dietary fiber (H-IDF). Physicochemical and functional properties of IDFs were examined in relation to carboxymethylation degree. Infrared Fourier transform spectroscopy (FT-IR) confirmed the carboxymethyl group...
June 30, 2024: Food chemistry: X
https://read.qxmd.com/read/38495455/effects-of-different-chemical-modifications-on-physicochemical-and-antioxidation-properties-of-lycium-barbarum-seed-dreg-polysaccharides
#30
JOURNAL ARTICLE
Xiu-Xiu Zhang, Wang-Wei Zhang, Zhi-Jing Ni, Kiran Thakur, Jian-Guo Zhang, Mohammad Rizwan Khan, Wen-Di Xu, Zhao-Jun Wei
Recent studies have witnessed that chemical modification can improve the physicochemical and functional properties of plants' polysaccharides. Herein, we modified the natural Lycium barbarum seed dreg polysaccharides (LBSDPs) by sulfation (S-LBSDPs), phosphorylation (P-LBSDPs), and carboxymethylation (C-LBSDPs), and evaluated the chemical composition and antioxidant activity of their derivatives. Natural polysaccharides and their derivatives exhibited typical polysaccharide absorption peaks and characteristic group absorption peaks in FT-IR spectra along with maximum UV absorption...
June 30, 2024: Food chemistry: X
https://read.qxmd.com/read/38493664/hsfa3-functions-as-a-positive-regulator-of-hsfa2a-to-enhance-thermotolerance-in-perennial-ryegrass
#31
JOURNAL ARTICLE
Tianxiao Sun, Weiliang Wang, Xianmei Hu, Lin Meng, Lin Xiang, Yanping Wang, Caiyun Wang, Hong Luo, Cathrine Ziyomo, Zhulong Chan
Perennial ryegrass (Lolium perenne) is a widely used cool season turfgrass with outstanding turf quality and grazing tolerance. High temperature is the key factor restricting the distribution of perennial ryegrass in temperate and sub-tropic regions. In this study, we found that one HEAT SHCOK TRANSCRIPTION FACOTR (HSF) class A gene from perennial ryegrass, LpHSFA3, was highly induced by heat stress. LpHSFA3 is localized in nucleus and functions as a transcription factor. Ectopic overexpression of LpHSFA3 in Arabidopsis improved thermotolerance and rescued heat sensitive deficiency of athsfa3 mutant...
March 14, 2024: Plant Physiology and Biochemistry: PPB
https://read.qxmd.com/read/38493300/agreement-between-measured-and-self-reported-physiological-strain-in-males-and-females-during-simulated-occupational-heat-stress
#32
JOURNAL ARTICLE
Fergus K O'Connor, Robert D Meade, Sean R Notley, Leonidas G Ioannou, Andreas D Flouris, Glen P Kenny
RATIONALE: Monitoring physiological strain is recommended to safeguard workers during heat exposure, but is logistically challenging. The perceptual strain index (PeSI) is a subjective estimate thought to reflect the physiological strain index (PSI) that requires no physiological monitoring. However, sex is known to influence perceptions of heat stress, potentially limiting the utility of the PeSI. OBJECTIVES: The objective of this study was to assess whether sex modifies the relationship between PeSI and PSI...
March 16, 2024: American Journal of Industrial Medicine
https://read.qxmd.com/read/38490399/characterization-of-type1-lipid-transfer-protein-from-citrus-sinensis-unraveling-its-potential-as-an-antimicrobial-and-insecticidal-agent
#33
JOURNAL ARTICLE
Surabhi Rode, Harry Kaur, Monica Sharma, Vivek Shah, Shiv Shakti Singh, Mrugendra Gubyad, Dilip Kumar Ghosh, Debabrata Sircar, Pravindra Kumar, Partha Roy, Ashwani Kumar Sharma
Lipid Transfer Protein1 (LTP1) is a cationic, multifaceted protein belonging to the pathogenesis-related protein (PR14) family. Despite being involved in diverse physiological processes and defense mechanisms, the precise in-vivo role of LTP1 remains undiscovered. This work presents the characterization of recombinant Citrus sinensis LTP1 (CsLTP1) along with lipid binding studies through in-silico and in-vitro approaches. CsLTP1 demonstrated great thermal and pH stability with a huge biotechnological potential...
March 14, 2024: International Journal of Biological Macromolecules
https://read.qxmd.com/read/38489406/effect-of-cardiorespiratory-fitness-level-on-physiological-responses-and-task-performance-during-a-high-rise-firefighting-task
#34
JOURNAL ARTICLE
Richard Daniel Mark Stevenson, Joseph Warwick, James Lee John Bilzon
OBJECTIVES: To determine the impact of cardiorespiratory fitness (CRF) on physiological and performance outcomes during a 120-m vertical high-rise ascent in firefighters with CRF levels at or above (higher-fit (HF)) and below (lower-fit (LF)) the national recommended minimum physical employment standard (O2max 42.3 ml·kg-1·min-1). METHODS: Twenty-eight firefighters completed two high-rise firefighting trials (continuous and discontinuous ascent with pre-determined 1-min rest breaks)...
March 14, 2024: Journal of Occupational and Environmental Medicine
https://read.qxmd.com/read/38488867/estimation-of-heat-production-rate-using-thermal-data-during-exercise-in-indoor-environments-a-study-of-heat-storage-rate-in-male-athletes
#35
JOURNAL ARTICLE
Gorkem Aybars Balci, Ali Berkay Avci, Muzaffer Colakoglu, Tahsin Basaran
The increasing preference for indoor exercise spaces highlights the relationship between indoor thermal environments and physiological responses, particularly concerning thermal comfort during physical activity. Determining the metabolic heat production rate during exercise is essential for optimizing the thermal comfort, well-being, and performance of individuals engaged in physical activities. This value can be determined during the activity using several methods, including direct calorimetry measurement, indirect calorimetry that uses analysis of respiratory gases, or approximations using collected data such as speed, body mass, and heart rate...
March 15, 2024: International Journal of Biometeorology
https://read.qxmd.com/read/38488866/effects-of-street-tree-configuration-and-placement-on-roadside-thermal-environment-within-a-tropical-urban-canyon
#36
JOURNAL ARTICLE
Sachini Jayasinghe, Varuni Jayasooriya, S M Dassanayake, S Muthukumaran
The Urban Heat Island (UHI) effect increases surface and air temperatures, affecting urban health and well-being. A well-known UHI mitigation measure is the increased roadside tree vegetation facilitating evapotranspiration and shade. In its implementation, the identification of thermally optimal street tree configurations and a quantitative assessment of how various street tree configurations impact the roadside thermal environment were deemed essential and were chosen as the main aims of the study. Twelve tropical urban canyons were categorized into three clusters representative of different street tree placement and configuration scenarios...
March 15, 2024: International Journal of Biometeorology
https://read.qxmd.com/read/38487731/the-impacts-of-diel-thermal-variability-on-growth-development-and-performance-of-wild-atlantic-salmon-salmo-salar-from-two-thermally-distinct-rivers
#37
JOURNAL ARTICLE
Sean Andrew, Sula Swart, Stephanie McKenna, Jenna Morissette, Carole-Anne Gillis, Tommi Linnansaari, Suzanne Currie, Andrea J Morash
Temperature in many natural aquatic environments follows a diel cycle, but to date, we know little on how diel thermal cycles affect fish biology. The current study investigates the growth, development and physiological performance of wild Atlantic salmon collected from the Miramichi and Restigouche rivers (NB, Canada). Fish were collected as parr and acclimated to either 16-21 or 19-24°C diel thermal cycles throughout the parr and smolt life stages. Both Miramichi and Restigouche Atlantic salmon parr grew at similar rates during 16-21 or 19-24°C acclimations...
2024: Conservation Physiology
https://read.qxmd.com/read/38486619/characterization-of-antimicrobial-multilayer-film-based-on-ethylcellulose-pectin-incorporated-with-nanoemulsions-of-trans-cinnamaldehyde-essential-oil
#38
JOURNAL ARTICLE
Fatemeh Baghi, Adem Gharsallaoui, Emilie Dumas, Géraldine Agusti, Sami Ghnimi
In this study, polymer solution casting was utilized to fabricate a multilayer film with ethylcellulose (EC) as the outer layers and trans -cinnamaldehyde-loaded pectin as the inner layer. A significant increase in whiteness and UV-visible light blocking capability and a remarkable decrease in total color difference and yellowness of the films were seen via increasing the thickness of EC outer layers. Scanning electronic microscopy observation showed that the inner and outer layers had a smooth and uniform surfaces with clear boundary...
June 30, 2024: Food chemistry: X
https://read.qxmd.com/read/38486618/cold-plasma-unveiling-its-impact-on-hydration-rheology-nutritional-and-anti-nutritional-properties-in-food-materials-an-overview
#39
REVIEW
Samuel Jaddu, Shivani Sonkar, Dibyakanta Seth, Madhuresh Dwivedi, Rama Chandra Pradhan, Gulden Goksen, Prakash Kumar Sarangi, Anet Režek Jambrak
Non-thermal technologies, primarily employed for microbial inactivation and quality preservation in foods, have seen a surge in interest, with non-thermal plasma garnering particular attention. Cold plasma exhibits promising outcomes, including enhanced germination, improved functional and rheological properties, and microorganism destruction. This has sparked increased exploration across various domains, notably in hydration and rheological properties for creating new products. This review underscores the manifold benefits of applying cold plasma to diverse food materials, such as cereal and millet flours, and gums...
June 30, 2024: Food chemistry: X
https://read.qxmd.com/read/38486407/comparing-methods-for-determining-the-metabolic-capacity-of-lumpfish-cyclopterus-lumpus-linnaeus-1758
#40
JOURNAL ARTICLE
Rachel M Eisenberg, Rebeccah M Sandrelli, Anthony Kurt Gamperl
Lumpfish (Cyclopterus lumpus) mortalities have been reported during the summer at some North Atlantic salmon cage-sites where they serve as "cleaner fish." To better understand this species' physiology and whether limitations in their metabolic capacity and thermal tolerance can explain this phenomenon, we compared the aerobic scope (AS) of 6°C-acclimated lumpfish (~50 g and 8.8 cm in length at the beginning of experiments) when all individuals (N = 12) were given a chase to exhaustion, a critical swim speed (Ucrit ) test, and a critical thermal maximum (CTMax ) test (rate of warming 2°C h-1 )...
March 14, 2024: Journal of Fish Biology
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