Capillary volume and evaporation of textile materials

2011 ◽  
Vol 7 (1) ◽  
pp. 1-15
Author(s):  
István Patay ◽  
Márk Montvajszki
Keyword(s):  
Weather Conditions ◽  
Secondary Effect ◽  
Air Humidity ◽  
Evaporation Surface ◽  
Total Evaporation ◽  
Textile Materials ◽  
Principal Influence ◽  
Relative Air Humidity ◽  
Evaporation Intensity ◽  
Main Factor

The objectives of the paper were to show that the evaporation intensity of water can be increased by the application of appropriate textile materials. The purpose was to determine the dependence of the evaporation intensity on the textile characteristics and the influence weather conditions on the evaporation intensity of different textiles. Five different textile strips of different widths and of single- and multi-layer were tested in definite experimental pots under open air conditions. The results of the experiments showed the total evaporation surface of the textiles depended on the texture material and the capillary volume of the textiles and the capillary volume had a limit at approximately Vc = 1000–1200 cm3/m2. Another important result was that the relative air humidity is a main factor of the weather conditions that has principal influence on the evaporation intensity. However, the other parameters — such as temperature, solar radiation and wind speed — have only a secondary effect on the evaporation intensity of textiles.

scholarly journals The Prevention of Tipburn on Chinese Cabbage (Brassica rapa L. var. pekinensis (Lour.) Olson) with Foliar Fertilizers and Biostimulators

2016 ◽  
Vol 24 (1) ◽  
pp. 47-56
Author(s):  
Jan Borkowski ◽  
Barbara Dyki ◽  
Michał Oskiera ◽  
Aleksandra Machlańska ◽  
Anna Felczyńska
Keyword(s):  
Brassica Rapa ◽  
Chinese Cabbage ◽  
Foliar Application ◽  
Calcium Nitrate ◽  
Weather Conditions ◽  
Potassium Oxide ◽  
Air Humidity ◽  
Physiological Disorder ◽  
Relative Air Humidity ◽  
Young Leaves

AbstractInvestigations were carried out in 2008-2010 on Chinese cabbage (Brassica rapaL. var.pekinensis(Lour.) Olson). The main problem in cultivation of this vegetable is physiological disorder – tipburn. It is connected with low level of calcium in young leaves and with water deficiency. In 2008, seeds of Chinese cabbage were sown twice, in April and July. In July, the day temperature was high (25-30 °C) and relative air humidity was low (35-50%). In these conditions, the young leaves were injured heavily. Rotting was caused by the activity of bacteriaPectobacterium carotovorumsubsp.carotovorum(Jones) Hauben et al. However, three times foliar application of 1.5% calcium nitrate or 1.5% Wapnovit significantly reduced the tipburn. Also spraying with 0.03% of Tytanit (containing ions of titanium) or with 2.5% of Biochikol 020 PC (containing chitosan) gave similar effect. In these conditions, application of 1.5% K-300 (containing potassium oxide and ammonium nitrate) exacerbated symptoms of tipburn. Application of Wapnovit or Tytanit reduced instantly rotting of heads contrary to the application of their mixture. In autumn cultivation, when the relative air humidity was 80-100%, spraying with 1.5% solution of K-300 significantly decreased injuries in comparison to control. Application of Wapnovit, K-300, Biochikol, Tytanit or the mixture of Biochikol and calcium nitrate eliminated rotting. In experiments done in the springs of 2009 and 2010, when weather conditions were less favorable for tipburn appearance, a severity of it was lower but application of K-300 increased it appearance. In these experiments, Biochikol and Wapnovit eliminated rotting of heads. The results of three years of study have shown that calcium nitrate, Wapnovit, Tytanit and Biochikol limited occurrence of tipburn and bacterial rotting of Chinese cabbage, but the weather conditions during cultivation had the greatest impact on the severity of tipburn.

scholarly journals The influence of weather conditions on the course of pollen seasons of alder (Alnus spp.), hazel (Corylus spp.) and birch (Betula spp.) in Lublin (2001-2006)

2012 ◽  
Vol 61 (1) ◽  
pp. 53-57 ◽  
Author(s):  
Agnieszka Dąbrowska
Keyword(s):  
Pollen Season ◽  
Birch Pollen ◽  
Correlation Coefficients ◽  
Pollen Grains ◽  
Thermal Conditions ◽  
Weather Conditions ◽  
Air Humidity ◽  
Relative Air Humidity ◽  
Beginning Of Flowering ◽  
Pollen Seasons

The start and rate of florescence of <i>Alnus</i>, <i>Corylus</i> and <i>Betula</i> are dependent on meteorological conditions. In the present paper we have analysed the effect of mean, maximum and minimum temperature, relative air humidity and precipitation on the onset of the pollen season as well as on its length and annual count of pollen grains in alder, hazel and birch. The measurement of pollen fall was done by the gravimetric methods with the use of Durham sampler. Correlation coefficients were calculated between the determined characteristics of the pollen season and weather conditions. In the six-year research period 2001-2006 it was observed that low temperatures in January produced a delayed start of the pollen season in alder, hazel and birch. The beginning of flowering in these taxa was also influenced by thermal conditions prevailing directly before the season (ca. 10 days). The pollen season of the trees in question tended to be prolonged alongside with the increase in relative air humidity, but it was shortened due to higher temperatures. The volume of alder and hazel pollen release increased together with the rise in relative air humidity and precipitation. The annual counts of birch pollen increased along with rising temperature and decreasing relative air humidity and precipitation in the season.

scholarly journals THE INCIDENCE OF PAROXYSMAL ATRIAL FIBRILLATION DEPENDING ON WEATHER CONDITIONS

2017 ◽  
pp. 39-43
Author(s):  
A. N. Tsyrulnikova ◽  
A. E. Voropaeva ◽  
A. N. Aleynikova ◽  
V. N. Dotsenko
Keyword(s):  
Risk Factors ◽  
Atrial Fibrillation ◽  
Coronary Heart Disease ◽  
Heart Disease ◽  
Atmospheric Pressure ◽  
Weather Conditions ◽  
Meteorological Conditions ◽  
Emergency Medical Care ◽  
Air Humidity ◽  
Relative Air Humidity

Objective: to analyze the influence of different meteorological conditions: relative air humidity, atmospheric pressure, precipitation on the incidence of development of AF paroxysms. Material and methods. The study involved 259 patients with AF paroxysms who were admitted into the Cardiology ward of Gomel City Clinical Hospital of Emergency Medical Care during the period from November 2015 to January 2016. Results. We have determined the incidence of development of AF paroxysms depending on such weather conditions as atmospheric pressure, relative air humidity, cloudiness, and precipitation. Conclusion. Meteorological conditions have a direct effect on the occurrence of AF paroxysms. The determined risk factors in this case are: high relative humidity, fall of temperature and harsh precipitation and changes in atmospheric pressure. Also, the aggravating factor in the development of AF paroxysms was age of patients over 56 and a combination of coronary heart disease and hypertension.

scholarly journals Estudo da atuação do anticiclone subtropical do Atlântico Sul sobre a umidade relativa do ar no entorno do Parque Estadual do Rio Doce por meio de revisão sistêmica da literatura

ForScience ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. e00771
Author(s):  
Cristiano Alexandre Vieira ◽  
Neimar de Freitas Duarte ◽  
Fúlvio Cupolillo
Keyword(s):  
High Pressure ◽  
Weather Conditions ◽  
South Atlantic ◽  
Air Humidity ◽  
The South ◽  
Pressure System ◽  
Subtropical Anticyclone ◽  
Preventive Actions ◽  
Relative Air Humidity ◽  
Mechanisms Of Formation

O objetivo deste artigo foi realizar levantamentos na literatura em estudos sobre o Anticiclone Subtropical do Atlântico Sul e suas características relacionadas à umidade relativa do ar. O levantamento foi baseado no método de revisão bibliográfica sistemática. A pesquisa foi realizada por meio de consulta nas bases de dados: Google Acadêmico, Capes e Scielo. Verificamos que o tema “Anticiclone Subtropical do Atlântico Sul (ASAS)” é bastante discutido na literatura, tanto em relação aos mecanismos de formação dos sistemas de alta pressão quanto à sua influência sobre as condições meteorológicas. Alguns trabalhos abordaram temas referentes aos impactos advindos da presença deste sistema atmosférico e às questões socioambientais, notando-se, ainda, uma pequena quantidade de artigos e trabalhos que abordam ações preventivas que devem ser inseridas em épocas de ocorrência do ASAS. Palavras-chave: Influência do ASAS. Sistema de alta pressão. Dinâmica atmosférica.   Study of the action of the subtropical anticyclone of the South Atlantic on the relative air humidity in the surroundings of the Rio Doce State Park, through a systematic literature review AbstractThe objective of this article was to carry out surveys in the literature in studies on the South Atlantic Subtropical Anticyclone and its characteristics related to the relative humidity of the air. The survey was based on the systematic bibliographic review method. The research was carried out by consulting the databases: Google Acadêmico, Capes and Scielo. We found that the theme "South Atlantic Subtropical Anticyclone - ASAS" is widely discussed in the literature, both in the mechanisms of formation of high-pressure systems and their influence on weather conditions. Some works addressed issues related to the impacts arising from the presence of this atmospheric system and socioenvironmental issues. Still there is also a smallnumber of articles and works that address preventive actions in which they should be inserted in times of occurrence of ASAS. Keywords: Influence of ASAS. High Pressure System. Atmospheric dynamics.

scholarly journals Ammonia concentrations in a free-stall dairy barn

2014 ◽  
Vol 14 (1) ◽  
pp. 153-166 ◽  
Author(s):  
Piotr Herbut ◽  
Sabina Angrecka
Keyword(s):  
Relative Humidity ◽  
Weather Conditions ◽  
Ammonia Concentration ◽  
Air Humidity ◽  
Movement Velocity ◽  
Air Movement ◽  
Air Temperatures ◽  
Relative Air Humidity ◽  
Measurement Results ◽  
Low Humidity

AbstractThe paper presents the results of research on indoor ammonia (NH3) concentrations in the air in a free-stall barn. The differences in measurement results mainly depended on the season and weather conditions. The study also showed a significant correlation (P<0.01) between the NH3 concentration and temperature, relative humidity and air movement velocity inside the barn. The lowest NH3 concentration was recorded in the summer (0.0 ppm) in the presence of high air temperatures, low humidity and increased exchange of ventilated air. In winter during severe frosts, highest ammonia concentration (8.0 ppm) was noted, caused by limited ventilation. The highest daily ammonia concentration was usually recorded during the night. This was due to increased relative air humidity and low air velocities. It was concluded that the average level of ammonia of 2.73 ppm during the entire year was significantly below values defined as harmful for animals and people.

scholarly journals DO WEATHER CONDITIONS INFLUENCE COVID-19 EPIDEMIC PROCESS?

InterConf ◽  
2021 ◽  
pp. 455-461
Author(s):  
Nataliiа Halushko ◽  
Ogunsanya Ifeoluwa
Keyword(s):  
Air Temperature ◽  
Atmospheric Pressure ◽  
Meteorological Factors ◽  
Absolute Humidity ◽  
Weather Conditions ◽  
Air Humidity ◽  
Epidemic Process ◽  
Factors Influencing ◽  
Relative Air Humidity ◽  
North Eastern

We studied the influence of weather conditions (air temperature, absolute and relative air humidity, atmospheric pressure, wind speed and geomagnetic activity) on the epidemic process of COVID-19 in Sumy that is a city in north-eastern Ukraine for the period 4.05.2020-22.03.2021. The study was carried out using nonparametric Kruskal-Wallis dispersive analysis. The obtained results show that all meteorological factors affect the COVID-19 incidence rate. The air temperature, absolute humidity and atmospheric pressure are the most important meteorological factors influencing COVID-19 epidemic process

scholarly journals Water content in terricolous lichens

2014 ◽  
Vol 69 (1) ◽  
pp. 55-63 ◽  
Author(s):  
Anna Matwiejuk
Keyword(s):  
Water Content ◽  
Weather Conditions ◽  
Air Humidity ◽  
Relative Air Humidity ◽  
Terricolous Lichens ◽  
Cladina Rangiferina

Investigations of the 24-hour absorption and evaporation in <em>Cetraria ericetorum</em>, <em>Cetraria islandica</em>, <em>Cladina mitis</em>, <em>Cladina rangiferina</em>, <em>Cladonia furcata</em>, <em>Cladonia phyllophora</em> were carrided out. A high correlation was found between these processes and weather conditions and especially 24-hour changes in relative air humidity and changes in temperature. These processes are correlated independently of the season of the year.

scholarly journals Air flow humidification for air-assisted boom sprayer

2014 ◽  
Vol 34 (1) ◽  
pp. 48-56
Author(s):  
Wilson M. Stanislavski ◽  
Ulisses R. Antuniassi ◽  
Rodolfo G. Chechetto
Keyword(s):  
High Temperatures ◽  
Air Temperature ◽  
Air Flow ◽  
Weather Conditions ◽  
Air Humidity ◽  
Middle Point ◽  
Air Curtain ◽  
Maximum Change ◽  
Relative Air Humidity ◽  
Low Humidity

The air-assisted ground spray is fairly widespread. However, due to the unpredictable weather conditions, the operational efficiency is impaired by stops on grounds of low humidity and high temperatures. The aim of this work was to assess an air humidification method and evaluate its impact on temperature and air humidity for the air curtain of the air-assisted sprayer. With respect to relative air humidity, it has increased in 6.59%, being the maximum change when inserting 1.92 L min-1. So, it is concluded that the pipeline humidification might significantly reduce temperature and enhance air humidity. The treatments performed in this study consisted of a varied flow of a humidity device, related to weather conditions. Temperature and relative air humidity were measured at 1.0 m height from right to left of middle point of the machine, corresponding to the end of the spray boom, in the middle and end of right spray boom. The readings were also performed at three different distances from the end of the pipeline and at 0.25 and 0.50 m from that to the soil. The results show that 0.48 L min-1 in the humidification system has promoted a better efficiency in reducing air-temperature, on average 2.52 ºC when compared to the non-humidified one.

Visco-elastic changes of vocal fold mucosa related to high and low relative air humidity

2000 ◽  
Vol 25 (4) ◽  
pp. 329-330
Author(s):  
R.J.B. Hemler ◽  
G.H. Wieneke ◽  
P.H. Dejonckere
Keyword(s):  
Vocal Fold ◽  
Air Humidity ◽  
Relative Air Humidity

Clinical, epidemiological and climatic factors related to the occurrence of cutaneous leishmaniasis in an endemic area in northeastern Brazil

2020 ◽  
Author(s):  
R. S. Oliveira ◽  
K. B. A. Pimentel ◽  
M. L. Moura ◽  
C. F. Aragão ◽  
A. S. Guimarães-e-Silva ◽  
...  
Keyword(s):  
Cutaneous Leishmaniasis ◽  
Climatic Factors ◽  
Wide Distribution ◽  
Northeastern Brazil ◽  
Public Health Issue ◽  
Air Humidity ◽  
Disease Occurrence ◽  
Relative Air Humidity ◽  
Age Range ◽  
And Control

Abstract Cutaneous leishmaniasis (CL) is a neglected tropical disease with a wide distribution in the Americas. Brazil is an endemic country and present cases in all states. This study aimed to describe the occurrence, the underlying clinical and epidemiological factors, and the correlation of climatic variables with the frequency of reported CL cases in the municipality of Caxias, state of Maranhão, Brazil. This is a retrospective and descriptive epidemiological study based on data extracted from the Brazilian Information System of Diseases Notification, from 2007 to 2017. Maximum and minimum temperature, precipitation, and relative air humidity data were provided by the Brazilian National Institute of Meteorology. A total of 201 reported autochthonous CL cases were analyzed. The predominance of cases was observed in males (70.1%). The age range between 31 and 60 years old was the most affected, with 96 cases (47.9%). Of the total number of registered cases, 38.8% of the affected individuals were engaged in agriculture-related activities. The georeferenced distribution revealed the heterogeneity of disease occurrence, with cases concentrated in the Western and Southern regions of the municipality. An association was detected between relative air humidity (monthly mean) and the number of CL cases per month (p = 0.04). CL continues to be a concerning public health issue in Caxias. In this context, there is a pressing need to strengthen measures of prevention and control of the disease through the network of health services of the municipality, considering local and regional particularities.

Sign in / Sign up

Export Citation Format

Share Document