scholarly journals Effect of exercise and humid heat upon pulse rate, blood pressure, body temperature, and blood concentration

1920 ◽  
Vol 91 (636) ◽  
pp. 111-126 ◽  
Keyword(s):  
Blood Pressure ◽  
High Temperature ◽  
Body Temperature ◽  
Human Body ◽  
Temperate Climate ◽  
Human Organism ◽  
Atmospheric Conditions ◽  
Hot Climate ◽  
The Tropics ◽  
Short Time

The effect of exercise on the human body has been made the subject of much study at different times. Researches have been carried out under atmospheric conditions such as prevail in different parts of Northern Europe, and they have been extended in a few instances to the effects of high temperature and humidity upon the human body. In the latter observations the conditions such as high temperature and varying humidity were produced by artificial means only, and general deductions as to the influence of an actual tropical climate upon the human organism cannot be safely drawn from them. In these experiments the subjects were living in a temperate climate, were exposed to heat and humidity for a short time only, and left the hot chamber at the end of the experiment for an atmosphere of coolness and comfort; in the tropics, on the other hand, the inhabitants are continuously exposed to heat and humidity without respite. Conclusions of real value can thus be drawn only from observations actually carried out in a hot climate, and systematic work in this direction is still lacking. Although observations have been made in the tropics on body temperature, blood pressure, pulse and respiration rate, and metabolism, yet their object has only been to obtain normal standards for the tropics for comparison with those of Europe.

scholarly journals V. The measurement of the rate of heat-loss at body temperature by convection, radiation, and evaporation

1916 ◽  
Vol 207 (335-347) ◽  
pp. 183-220 ◽  
Keyword(s):  
Body Temperature ◽  
Heat Loss ◽  
Human Body ◽  
Vapour Pressure ◽  
Barometric Pressure ◽  
Atmospheric Conditions ◽  
Average Temperature ◽  
Rate Of Cooling ◽  
Wet Surface ◽  
Rate Of Evaporation

The purpose of the research detailed in the following pages has been:— (1) To investigate rate of cooling of (1) a dry and (2) a wet surface at body temperature under varying atmospheric conditions, using the kata-thermo-meter—an instrument contrived by one of us (L. H.) for this purpose; (2) To calibrate this instrument so that the rate of cooling can be expressed in millicalories per second at body temperature; (3) To separate and measure the cooling produced in still air by ( a ) convection, ( b ) radiation, ( c ) evaporation; (4) To measure the cooling effect of wind of varying known velocity, and to calibrate the kata-thermometer as an anemometer—an observation of value since this instrument is sensitive not only to a uni-directional stream, but to every eddy, such as cannot be estimated by any vane anemometer; (5) To measure the effect on the rate of cooling of variations in the barometric pressure; (6) To deduce from the readings of the wet and dry kata-thermometer, taken in still air, the rate of evaporation from a wet surface at body temperature, and to establish the relation of this rate of evaporation to ( a ) vapour pressure, ( b ) barometric pressure, and ( c ) temperature of the atmosphere; (7) To determine how this rate of evaporation is affected by wind of varying known velocity; (8) By these means to arrive at a method of measuring the relative rates of heat-loss to which the skin is exposed by convection, radiation and evaporation, under varying atmospheric conditions. For purposes of controlling the heating and ventilation of rooms the thermometer has been used and has acquired an authority which it does not deserve. The dry bulb thermometer indicates the average temperature of the piece of wood to which it is attached, influenced, as it is, by the temperature of all the objects around it and the atmosphere in which it is suspended. It affords no measure of the rate of cooling of the human body, and is, therefore, a very indifferent instrument for indicating atmospheric conditions which are comfortable and healthy to man.

scholarly journals Hypothetical model of COVID-19: origin,spread,binding,infection,treatment and prevention(Version10）

2020 ◽  
Author(s):  
Alex Lee
Keyword(s):  
High Temperature ◽  
Body Temperature ◽  
Human Body ◽  
Human Infection ◽  
The Body ◽  
Human Immune System ◽  
Treatment And Prevention ◽  
Hypothesis Model ◽  
The World ◽  
Prevention Method

2019 Coronavirus Hypothesis Model, preliminary hypothesis model, no experiments have been conducted yet. For laboratory reference only, please do not apply this theory before experimental verification. This article discusses the origin of the 2019 Coronavirus, the principles of human infection, the principles of transmission, high binding, changes in human temperature, prevention and treatmen.2019 Coronavirus originates from bats or other animals. In bats, this virus is a cooling factor. Due to the high temperature of bats, this cooling factor lowers the temperature of bats and belongs to normal life activity, it will not produce immune activation, and thus will not produce infections and diseases in the bat body. When this cooling factor enters the human body, especially when the temperature is low, the virus starts the function of the cooling factor in the human body, that is, to lower the human body temperature, the chill happens. The human immune system starts the immune function and gives a fever to fight the cooling. The replication and binding of the 2019 Coronavirus depends on the temperature of the surrounding cells. The higher the temperature, the more replicated and the stronger the binding. Therefore, the fever of the human body promotes the aggravation of the disease. addition to those suspected of having a fever, people whose body temperature is lower than normal may also be infected with 2019 Coronavirus. The way for bats to inhibit the replication of 2019 Coronavirus is high temperature, to avoid body temperature too low. It can be experimented to put the human body in a higher temperature environment, the heat is transmitted to the body, and the low temperature factor of the 2019 Coronavirus can be overcome. The hypothetical prevention method is: everyone in the world isolates for a certain period of time, and raises the temperature around the human body, so that everyone in the world has no 2019 Coronavirus.

scholarly journals Melting n-eicosane in scaled-up model of capsule for use in hot climate thermal-comfort garments

2019 ◽  
Vol 213 ◽  
pp. 02086
Author(s):  
Václav Tesař ◽  
Jozef Kordík
Keyword(s):  
Body Temperature ◽  
Thermal Comfort ◽  
Human Body ◽  
Large Scale ◽  
Initial Temperature ◽  
Melting Process ◽  
Cold Desert ◽  
Hot Climate ◽  
Human Body Temperature ◽  
Spherical Capsule

Recent ideas in development of garments for thermal comfort in desert climates concentrate on textile containing small capsules filled with material melting to store latent heat at roughly human body temperature. This cools the garment wearer during the hot day and later keeps him warm in the cold desert night. This article investigates the melting process in a single scaled up model of spherical capsule filled with n-eicosane – a material melting at Tm = 35.7 ˚C. In the experiment, the capsule model was heated starting from the initial temperature 30˚C by warm water at 50.4 ˚C. The large scale of the model made possible study of details of the melting process.

scholarly journals Climatic-niche evolution of SARS-CoV-2

2020 ◽  
Author(s):  
Priyanka Bajaj ◽  
Prakash Chandra Arya
Keyword(s):  
Latitudinal Gradient ◽  
Abiotic Factors ◽  
Phylogenetic Network ◽  
Climatic Conditions ◽  
Cold Climate ◽  
Temperate Climate ◽  
List Type ◽  
Hot Climate ◽  
In The Beginning ◽  
The Tropics

AbstractCOVID-19 pandemic is studied by several field experts. However, it is still unclear why it was restricted to higher latitudes during the initial days & later cascaded in the tropics. Here, we analyzed 176 SARS-CoV-2 genomes across different latitudes & climate (Koppen’s climate) that provided insights about within species virus evolution & its relation to abiotic factors. Two genetically variant groups, named as G1 & G2 were identified, well defined by four mutations. The G1 group (ancestor), is mainly restricted to warm & moist, temperate climate (Koppen’s C climate) while its descendent G2 group surpasses the climatic restrictions of G1, initially cascading into neighboring cold climate (D) of higher latitudes & later into hot climate of the tropics (A). It appears that the gradation of temperate climate (Cfa-Cfb) to “cold climate” (Dfa-Dfb) climate drives the evolution of G1 into G2 variant group which later adapted to tropical climate (A) as well. It seems this virus follows inverse latitudinal gradient in the beginning due to its preference towards temperate (C) & cold climate (D). Nevertheless, due to the uncertainty of COVID-19 data, the results must be cautiously interpreted & should not be extrapolated to climate types and climatic conditions other than those analyzed here for the early evolution period. Our work elucidates virus evolutionary studies combined with climatic studies can provide crucial information about the pathogenesis & natural spreading pathways in such outbreaks which is hard to achieve through individual studies.Graphical AbstractIn BriefThe authors elucidate adaptation of SARS-CoV-2 to different climates by studying phylogenetics & the distribution of strains on Koppen’s climate map.HighlightsSARS-CoV-2 follows inverse latitudinal gradient during initial days.Phylogenetic network divides SARS-CoV-2 strains into two variant groups, G1 & G2.G1 strains is restricted to Koppen’s “temperate” climate (mainly Cfa-Cfb).G2 strains has evolved from G1 to sustain in mainly “humid-continental” (Dfa-Dfb) & “tropical-savannah” (Aw) climate.

scholarly journals TRPA1 tunes mosquito thermotaxis to host temperatures

2015 ◽  
Author(s):  
Roman A Corfas ◽  
Leslie B Vosshall
Keyword(s):  
High Temperature ◽  
Body Temperature ◽  
Human Body ◽  
Thermal Environment ◽  
Ambient Air ◽  
Body Temperatures ◽  
Host Body ◽  
Host Seeking ◽  
Thermal Stimuli ◽  
Body Heat

While most ectotherms thermotax only to regulate their temperature, female mosquitoes are attracted to human body heat during pursuit of a blood meal. Here we elucidate the basic rules of Aedes aegypti thermotaxis and test the function of candidate thermoreceptors in this important behavior. We show that host-seeking mosquitoes are maximally attracted to thermal stimuli approximating host body temperatures, seeking relative warmth while avoiding both relative cooling and stimuli exceeding host body temperature. We found that the cation channel TRPA1, in addition to playing a conserved role in thermoregulation and chemosensation, is required for this specialized host-selective thermotaxis in mosquitoes. During host-seeking, AaegTRPA1-/- mutants failed to avoid stimuli exceeding host temperature, and were unable to discriminate between host-temperature and high-temperature stimuli. TRPA1-dependent tuning of thermotaxis is likely critical for mosquitoes host-seeking in a complex thermal environment in which humans are warmer than ambient air, but cooler than surrounding sun-warmed surfaces.

scholarly journals Intelligent Medical System with Low-Cost Wearable Monitoring Devices to Measure Basic Vital Signals of Admitted Patients

Micromachines ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 918
Author(s):  
Siraporn Sakphrom ◽  
Thunyawat Limpiti ◽  
Krit Funsian ◽  
Srawouth Chandhaket ◽  
Rina Haiges ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Time Delay ◽  
Body Temperature ◽  
Low Cost ◽  
Vital Signs ◽  
Smart Devices ◽  
Wide Range ◽  
And Function ◽  
Short Time

This article presents the design of a low-cost Wireless Body Sensor Network (WBSN) for monitoring vital signs including a low-cost smart wristwatch that contains an ESP-32 microcontroller and three sensors: heart rate (HR), blood pressure (BP) and body temperature (BT), and an Internet of Things (IoT) platform. The vital signs data are processed and displayed on an OLED screen of the patient’s wristwatch and sent the data over a wireless connection (Wi-Fi) and a Cloud Thing Board system, to store and manage the data in a data center. The data can be analyzed and notified to medical staff when abnormal signals are received from the sensors based on a set parameters from specialists. The proposed low-cost system can be used in a wide range of applications including field hospitals for asymptotic or mild-condition COVID-19 patients as the system can be used to screen those patients out of symptomatic patients who require more costly facilities in a hospital with considerably low expense and installation time, also suitable for bedridden patients, palliative care patients, etc. Testing experiments of a 60-person sample size showed an acceptable accuracy level compared with standard devices when testing with 60 patient-samples with the mean errors heart rate of 1.22%, systolic blood pressure of 1.39%, diastolic blood pressure of 1.01%, and body temperature of 0.13%. According to testing results with 10 smart devices connected with the platform, the time delay caused by the distance between smart devices and the router is 10 s each round with the longest outdoor distance of 200 m. As there is a short-time delay, it does not affect the working ability of the smart system. It is still making the proposed system be able to show patient’s status and function in emergency cases.

scholarly journals The Influence of High Temperature Weather on Human Body Temperature Measurement by Infrared Thermal Imaging Thermometer

2021 ◽  
Vol 2112 (1) ◽  
pp. 012024
Author(s):  
Guangdong Mei ◽  
Senlin Peng ◽  
Zhiwei Zeng ◽  
Tingdi Liao ◽  
Yantang Huang
Keyword(s):  
High Temperature ◽  
Body Temperature ◽  
Human Body ◽  
Large Scale ◽  
The Body ◽  
Rapid Screening ◽  
Thermal Imager ◽  
Relative Temperature ◽  
Human Body Temperature ◽  
Infrared Thermal Imager

Abstract Infrared thermography thermometer is a non-contact temperature measuring equipment, which is widely used in the stage of large-scale epidemic of the covid-19 pandemic. It is used for rapid screening of human body temperature in crowded places at the entrance and exit of airports, docks, shopping malls, stations and schools. But when the outdoor temperature approaches or exceeds the body temperature in summer, can this method of measuring body surface temperature by infrared thermal imager be used as a standard for screening fever? Under the condition of high temperature in summer, the field experiment of measuring body temperature by infrared thermal imager is carried out, the experimental results are analyzed. We recommend the use of relative temperature difference for screening patients with fever.

PENURUNAN SUHU TUBUH MENGGUNAKAN TEPID WATER SPONGING DENGAN PENDEKATAN KONSERVASI LEVINE

2019 ◽  
Vol 11 (1) ◽  
pp. 33-40
Author(s):  
Muhammad Khabib Burhanuddin Iqomh ◽  
Nani Nurhaeni ◽  
Dessie Wanda
Keyword(s):  
Body Temperature ◽  
Nursing Care ◽  
Human Body ◽  
Model Theory ◽  
Pharmacological Treatment ◽  
Scientific Work ◽  
Pharmacological Therapy ◽  
Nursing Process ◽  
Tepid Water ◽  
Conservation Model

Peningkatan suhu tubuh  menyebabkan rasa tidak nyaman, gelisah pada anak, sehingga waktu untuk istirahat menjadi terganggu.Tatalaksana pada anak dengan demam dapat dilakukan dengan metode farmakologi dan non farmakologi. Tepid water spongingmerupakan tatalaksana non farmakologi. Konservasi adalah serangkaian sistem agar tubuh manusia mampu menjalankan fungsi, beradaptasi untuk melangsungkan kehidupan. Perawat mempunyai peran untuk membantu anak dalam mengatasi gangguan termoregulasi. Karya ilmiah ini bertujuan untuk mengetahui efektifitas penurunan suhu tubuh menggunakan tepid water sponging dengan pendekatanl konservasi Levine di ruang rawat infeksi. Efektifitas diukur dalam pemberian asuhan keperawatan berdasarkan proses keperawatan yang terdapat dalam model konservasi Levine yaitu: pengkajian, menentukan trophicognosis, menentukan hipotesis, intervensi dan evaluasi. Terdapat lima kasus yang dibahas. Hasil penerapan model konservasi Levine mampu meningkatkan kemampuan anak dalam mempertahankan fungsi tubuh dan beradaptasi terhadap perubahan. Kombinasi tepid water sponging dan terapi farmakologi mampu mengatasi demam dengan cepat dibanding terapi farmakologi.   Kata kunci: termoregulasi, tepid water sponging, teori model konservasi Levine   REDUCTION OF BODY TEMPERATURE USING TEPID WATER SPONGINGWITH THE LEVINE CONSERVATION APPROACH   ABSTRACT Increased body temperature causes discomfort, anxiety in children, so that the time to rest becomes disturbed. Management of children with fever can be done by pharmacological and non-pharmacological methods. Tepid water sponging is a non-pharmacological treatment. Conservation is a series of systems so that the human body is able to function, adapt to life. Nurses have a role to help children overcome thermoregulation disorders. This scientific work aims to determine the effectiveness of decreasing body temperature using tepid water sponging with the approach of Levine conservation in the infectious care room. Effectiveness is measured in the provision of nursing care based on the nursing process contained in the Levine conservation model, namely: assessment, determining trophicognosis, determining hypotheses, intervention and evaluation. There are five cases discussed. The results of the application of the Levine conservation model are able to improve the ability of children to maintain body functions and adapt to changes. The combination of tepid water sponging and pharmacological therapy is able to overcome fever quickly compared to pharmacological therapy.   Keywords: thermoregulation, tepid water sponging, Levine conservation model theory  

EVALUATION OF PITUITARY-ADRENAL FUNCTION IN CHILDREN

1965 ◽  
Vol 48 (1) ◽  
pp. 81-90 ◽  
Author(s):  
B. van der Wal ◽  
T. Wiegman ◽  
J. F. Janssen ◽  
A. Delver ◽  
D. de Wied
Keyword(s):  
Blood Pressure ◽  
Body Temperature ◽  
Diastolic Blood Pressure ◽  
Linear Increase ◽  
Significant Rise ◽  
Moderate Increase ◽  
Specific Stimulus ◽  
Lysine Vasopressin ◽  
Free Cortisol ◽  
Pituitary Adrenal Axis

ABSTRACT The reactivity of the hypothalamico-pituitary-adrenal axis was determined in 48 children, not suffering from any endocrine disorder. The free cortisol (F)- and corticosterone (B) content of plasma was determined in response to ACTH (clinical corticotrophin; A1 peptide), a corticotrophin releaser (lysine vasopressin) and a non specific stimulus (bacterial polysaccharide) as compared to saline. The two ACTH-preparations infused over one hour in a dose of 5 IU per child elicited a marked increase in both F and B. Lysine vasopressin in a dose of 0.5 IU per year of age similarly infused, exhibited a distinct linear increase in the two circulating cortical steroids, although the effect of this octapeptide was smaller than that of the two ACTH-preparations. Blood pressure was also measured during the infusion with vasopressin or saline. The systolic blood pressure was not significantly affected by vasopressin, but a significant rise in diastolic blood pressure was found. No correlation between the increase in diastolic blood pressure and in blood corticoids in response to vasopressin, was found. The intravenous administration of a relatively small amount of pyrifer caused a moderate increase in circulating F which was significant only at 4 and 6 hours after the injection of the pyrogen. The B content did not increase significantly above that of saline treated control children, presumably because of the relatively weak corticotrophic activity of the pyrogen under these conditions. A positive linear relation between body temperature and time was found. No correlation between increase in body temperature and increase in circulating F could be demonstrated.

Sign in / Sign up

Export Citation Format

Share Document