نتایج جستجو برای: heat strain

تعداد نتایج: 416049  

Journal: :Industrial health 2006
J B M Malchaire

The work of the main European research teams in the field of thermal factors was coordinated in order to improve significantly the Required Sweat Rate model published as an international standard. Many significant modifications were brought, in particular concerning the effects of forced convection, body movements and exercise and the prediction of the skin temperature as a function of the rect...

Journal: :Ergonomics 2009
S J Petruzzello J I Gapin E Snook D L Smith

Firefighting demands performing heavy muscular work under adverse and potentially dangerous conditions. Although the physiological and psychological responses to simulated firefighting activities have been described, the heat strain has not been characterised using standardised indices of exercise-heat strain. The purpose of the study is to describe the physiological and perceptual strain assoc...

2006
G. Ravichandran A. J. Rosakis P. Rosakis

-This study investigates heat generation in metals during plastic deformation. Experiments were designedto measure the partition of plastic work into heat and stored energy during dynamic deformations under adiabatic conditions. A servohydraulic load frame was used to measure mechanical properties at lower strain rates, 10 -3 s -1 to 1 s -1. A Kolsky pressure bar was used to determine mechanica...

Journal: :Journal of the mechanical behavior of biomedical materials 2011
R Ahmed N H Faisal A M Paradowska M E Fitzpatrick K A Khor

The failure of an orthopaedic implant can be initiated by residual strain inherent to the hydroxyapatite coating (HAC). Knowledge of the through-thickness residual strain profile in the thermally sprayed hydroxyapatite coating/substrate system is therefore important in the development of a new generation of orthopaedic implants. As the coating microstructure is complex, non-destructive characte...

Journal: :Infection and immunity 1986
J D Clements F L Lyon K L Lowe A L Farrand S el-Morshidy

We used Salmonella enteritidis serotype dublin strain SL1438, a nonreverting, aromatic-dependent, histidine-requiring mutant, as a recipient for a recombinant plasmid coding for production of the nontoxic B subunit of the heat-labile Escherichia coli enterotoxin. The S. enteritidis derivative EL23 produced heat-labile enterotoxin subunit B that was indistinguishable from heat-labile enterotoxin...

Journal: :international journal of occupational hygiene 0
ghazal hoorfarasat msc, department of occupational health engineering, school of public health, shahid beheshti university of medical sciences, tehran, iran mohammad javad jafari phd (professor), department of occupational health engineering, school of public health, shahid beheshti university of medical sciences, tehran, iran leila omidi phd student, department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran sussan salehpour occupational medicine, masihe daneshvari hospital, shahid beheshti university of medical sciences, tehran, iran soheila khodakarim phd (assistant professor), department of epidemiology, school of public health, shahid beheshti university of medical sciences, tehran, iran naseh haydarnezhad msc, department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran

original article   the objectives of this research were to study the correlations of heat strain score index (hssi) and values of wet-bulb globe temperature (wbgt) index with physiological parameters such as core body temperature, heart rate, and blood pressure of workers exposed to heat stress in a glass manufacturing plant in order to determine the reliability of hssi. this cross sectional st...

2015
Quan Zhang Dong Yan Kai Zhang Gengkai Hu

A significant challenge in conventional heat-shrinkable polymers is to produce controllable microstructures. Here we report that the polymer material fabricated by three-dimensional (3D) printing technique has a heat-shrinkable property, whose initial microstructure can undergo a spontaneous pattern transformation under heating. The underlying mechanism is revealed by evaluating internal strain...

2016
Jane McNicholl Gordon S. Howarth Susan J. Hazel

Heat strain is a potential risk factor for racing greyhounds in hot climates. However, there have been limited studies into the incidence of heat strain (when excess heat causes physiological or pathological effects) in racing greyhounds. The aim of this study was to determine if heat strain occurs in racing greyhounds, and, if so, whether environmental factors (e.g., ambient temperature and re...

Journal: :Eukaryotic cell 2008
Seona Thompson Nirvana J Croft Antonis Sotiriou Hugh D Piggins Susan K Crosthwaite

Appropriate responses of organisms to heat stress are essential for their survival. In eukaryotes, adaptation to high temperatures is mediated by heat shock transcription factors (HSFs). HSFs regulate the expression of heat shock proteins, which function as molecular chaperones assisting in protein folding and stability. In many model organisms a great deal is known about the products of hsf ge...

2014
Zhonglei Lu Xiangxiang Kong Zhaoming Lu Meixiang Xiao Meiyuan Chen Liang Zhu Yuemao Shen Xiangyang Hu Siyang Song

Most mushrooms are thermo-sensitive to temperatures over 23°C, which greatly restricts their agricultural cultivation. Understanding mushroom's innate heat-tolerance mechanisms may facilitate genetic improvements of their thermotolerance. Agaricus bisporus strain 02 is a relatively thermotolerant mushroom strain, while strain 8213 is quite thermo-sensitive. Here, we compared their responses at ...

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