scholarly journals Emigration activity of the saw-toothed grain beetle Oryza Philus Surinamensis L. (Coleoptera: Silvanidae) in various environmental temperatures

2012 ◽  
Vol 52 (4) ◽  
pp. 397-400 ◽  
Author(s):  
Małgorzata Kłyś
Keyword(s):  
Population Dynamics ◽  
Relative Humidity ◽  
Optimum Temperature ◽  
Oryzaephilus Surinamensis ◽  
Air Humidity ◽  
Sex Structure ◽  
Total Inhibition ◽  
Relative Air Humidity ◽  
Environmental Temperatures ◽  
Very High

Abstract The study pertained to the saw-toothed grain beetle Oryzaephilus surinamensis L., a dangerous pest of stored food products. The studies were carried out in the laboratory. Thermostats were set at a temperature of 31°C; an optimum temperature for this insect species, and in temperatures lowered to 28 and 22°C. The relative air humidity was kept at 60 ±5% relative humidity (RH). The main topic of the study was to examine the effect of lower temperatures in the environment, on the emigration activity of O. surinamensis. In these conditions, the population dynamics and the sex structure in O. surinamensis populations were also studied. The saw-toothed grain beetle was found to display very high emigration activity at 31 and 28°C. Lowering the temperature to 22°C caused a decrease in emigration activity and total inhibition of emigration activity until the 120th day of the experiment. A higher emigration levels among females rather than males, was also observed.

scholarly journals Hypertension, pregnancy and weather: is seasonality involved?

2014 ◽  
Vol 60 (2) ◽  
pp. 105-110 ◽  
Author(s):  
Brena Melo ◽  
Melania Amorim ◽  
Leila Katz ◽  
Isabela Coutinho ◽  
José Natal Figueiroa
Keyword(s):  
Relative Humidity ◽  
Correlation Coefficient ◽  
Pearson Correlation ◽  
Hypertensive Disorder ◽  
Air Humidity ◽  
Hypertensive Disorders Of Pregnancy ◽  
Monthly Temperature ◽  
Hypertensive Disorders ◽  
Relative Air Humidity ◽  
Hypertensive Disorder Of Pregnancy

Objective: The present study aimed at assessing the association between environmental temperature and the relative humidity of the air with frequency of hypertensive disorders of pregnancy. Methods: A prospective and retrospective, descriptive, ecological study was held at a teaching maternity in Recife, Brazil. Data from all 26.125 pregnant women admitted between 2000 and 2006 were analysed and 5.051 had the diagnosis of hypertensive disorder of pregnancy. The incidence percentages were calculated monthly per deliveries. Data on mean monthly temperature and relative humidity of the air were collected and monthly comparisons were conducted. February was chosen as the reference month due to its lowest incidence of the disease. The relative chance of hypertensive disorders of pregnancy for each other month was estimated by odds ratio and Pearson's correlation coefficient was used to calculate the relation between the incidence of hypertensive disorders of pregnancy and the mean monthly temperature and relative air humidity. Results: February presented the lowest mean monthly incidence (9.95%) and August the highest (21.54%). Pearson correlation coefficient revealed a higher incidence of hypertensive disorders of pregnancy in the cooler months (r= -0.26; p=0.046) and no significant effect of relative air humidity (r=0.20; p=0.128). Conclusion: The incidence of hypertensive disorders of pregnancy may be affected by variations in temperature, increasing during cooler periods.

STUDY OF THE EFFECT OF RELATIVE HUMIDITY ON THE OPERATING MODES OF THE IONIZER

2018 ◽  
pp. 52-54
Author(s):  
A.D. Rakhmatov ◽  
S.R. Namozov
Keyword(s):  
Relative Humidity ◽  
Ion Concentration ◽  
Storage Tanks ◽  
Air Humidity ◽  
Fruit Storage ◽  
Operating Modes ◽  
Relative Air Humidity ◽  
Concentration Of Ions ◽  
Theoretical Assumptions ◽  
Air Ion Concentration

When using electro-ionizers in the conditions of the fruit storage facilities, it is necessary to take into account the influence of environmental conditions of the electrical ionizers. A particularly important factor here is the relative humidity of the air in the storage tanks. At higher values of the relative humidity of air in the atmosphere of the fruit storage, air ion combine with water molecules to form heavy ions, as a result of which the volume concentration of ions decreases. To test these theoretical assumptions, we conducted studies of the operating parameters of the ionizer under condition of storage tanks high relative air humidity. Studies have shown that under conditions of high air humidity the concentration of ion decreases by 10–12% and at a distance of 1 meter from the ionizer, the air ion concentration is 1,6∙1013 ion/m3.

scholarly journals Simulation of a thermal environment in two buildings for the wet processing of coffee

DYNA ◽  
2015 ◽  
Vol 82 (194) ◽  
pp. 214-220 ◽  
Author(s):  
Robinson Osorio Hernandez ◽  
Lina Marcela Guerra-Garcia ◽  
Ilda de Fátima Ferreira-Tinôco ◽  
Jairo Alexander Osorio-Saraz ◽  
Iván Darío Aristizábal-Torres
Keyword(s):  
Computer Simulation ◽  
Energy Consumption ◽  
Relative Humidity ◽  
Natural Ventilation ◽  
Thermal Environment ◽  
Coffee Bean ◽  
Air Humidity ◽  
Relative Air Humidity ◽  
Wet Processing

This study aimed to compare the bioclimate and energy consumption of two coffee wet processing facilities in Colombia, with two typical types of Colombian coffee, using computer simulation. Specifically, we evaluated the effect of the heat generated by machines and the effect of the natural ventilation area on temperature and relative air humidity inside these buildings and their energy consumption. The postharvest plant with typology b gave the best results in terms of temperature and relative humidity suitable to preserve the quality of the coffee bean. Its approximate energy consumption was 30% of the total consumed by typology a.

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 The effect of the design of housing systems for calves on the microclimatic conditions of the rearing environment

2013 ◽  
Vol 56 (1) ◽  
pp. 509-517 ◽  
Author(s):  
D. Němečková ◽  
I. Knížková ◽  
P. Kunc ◽  
L. Stádník
Keyword(s):  
Relative Humidity ◽  
Thermal Comfort ◽  
Air Temperature ◽  
Rectal Temperature ◽  
Housing System ◽  
Air Humidity ◽  
Housing Systems ◽  
Relative Air Humidity ◽  
Microclimatic Conditions ◽  
Calf Rearing

Abstract. The objective of this study was to compare microclimatic conditions in three different housing systems designed for calf rearing – individual wooden hutches, individual tarpaulin hutches and individual pens under shelter – and to evaluate the thermal comfort of calves reared in these systems. Air temperature, relative air humidity and the rectal temperature of calves (n=324) were measured in the hutches and pens during three consecutive years. The hypothesis that the climatic conditions of different housing system designs used in calf rearing affect the thermal comfort of calves was confirmed, as the design of the individual housing systems affected microclimatic conditions and subsequently the rectal temperature of the housed calves as well. Statistically significant differences (P<0.05) were found between the shelter and individual outdoor calf hutches in relation to the measured parameters. In the summer, the shelter showed a significantly (P<0.05) lower air temperature and significantly higher level of both relative air humidity and calf rectal temperature. These significantly higher rectal temperatures in both summer and in transitional periods (from March to June and from September to December) can be explained by microclimatic conditions and specifically by the combination of air temperature and the highest relative humidity that caused less comfortable microclimatic conditions for calves. The high relative humidity is probably caused by inadequate ventilation under the shelter. Therefore, new technology of calf housing under shelter could be recommended as suitable housing only if adequate ventilation is provided.

scholarly journals How diets and the environment influence on the weight of Roman snail in captivity

2020 ◽  
Vol 222 ◽  
pp. 02046
Author(s):  
Irina Tkachenko ◽  
Sergey Tkachenko ◽  
Viktor Dedkov
Keyword(s):  
Weight Loss ◽  
Weight Gain ◽  
Relative Humidity ◽  
Air Temperature ◽  
Helix Pomatia ◽  
Average Weight ◽  
Air Humidity ◽  
Relative Air Humidity ◽  
In Captivity ◽  
Leaf Vegetable

This article presents the results of a study into the influence of the diet, air temperature and relative air humidity, and soil temperature on the average weight of Helix pomatia in captivity. It was shown that vegetables included in the mixed leaf-vegetable diet mitigated the effect of a high air temperature and a low relative humidity. It was established that the air temperature and relative humidity had opposite effects on weight gain in Helix pomatia. The increase in temperature predetermined the weight loss. Despite the high temperature, a humidity of over 75% caused all the molluscs gain weight regardless of their diet.

scholarly journals The Microclimate in Protective Fire Fighter Footwear: Foot Temperature and Air Temperature and Relative Humidity

2016 ◽  
Vol 16 (2) ◽  
pp. 75-79 ◽  
Author(s):  
Emilia Irzmańska
Keyword(s):  
Relative Humidity ◽  
Air Temperature ◽  
Initial Level ◽  
Rest Period ◽  
Complete Information ◽  
Fire Fighter ◽  
Air Humidity ◽  
Dorsal Region ◽  
Relative Air Humidity ◽  
Plantar Region

Abstract The study material consisted of two models of protective firefighter footwear. The tests were conducted on subjects in a laboratory using an ergometric treadmill. The parameters of footwear microclimate were continuously recorded using T/RH sensors. For the leather footwear, the highest foot temperature was recorded in the 50th minute of the experiment (35.8°C in the dorsal region and 37.3°C in the plantar region) and for the polymer footwear in the 60th minute of the experiment (35.4°C in the dorsal region and 37.0°C in the plantar region). In the leather footwear, the temperature of the air surrounding the feet rose from 31.0°C to 35.4°C, and then declined, but did not return to the initial level during the rest period. In turn, in the polymer footwear, the temperature rose from 29.0 to 34.7°C, and then decreased to 33.7°C following the rest period. The highest relative air humidity was recorded in the polymer footwear (96.6%), while in the leather footwear it amounted to 91%. Testing the dynamics of the microclimate during footwear use provides complete information about changes in the temperature of the skin of the foot and the temperature and relative humidity of the footwear microclimate.

scholarly journals Gingerbread with Fruit Filling: Preservation Factor Assessment

2019 ◽  
Vol 49 (3) ◽  
pp. 397-405
Author(s):  
Николай Кондратьев ◽  
Nikolay Kondratev ◽  
Ксения Федорко ◽  
Ksenia Fedorko ◽  
Эмилия Крылова ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Shelf Life ◽  
Water Activity ◽  
Mass Fraction ◽  
Moisture Transfer ◽  
Free Water ◽  
Air Humidity ◽  
Transfer Processes ◽  
Relative Air Humidity ◽  
Confectionery Products

The ratio of ‘bound’ and ‘free’ water plays an important role in the studies of staling of various baked confectionery products. Gingerbread with fruit filling is a traditional flour confectionery product with intermediate moisture, which causes transfer processes during storage. Temperature, relative humidity, light exposure, mechanical stress, and pressure affect the staling speed of such confectionery products. The shelf life of raw gingerbread was increased from 10–20 days to more than two months, which caused microbiological deterioration during storage. Moisture transfer between the filling and the crumb increases water activity and ruins the capillary structure of gingerbread during storage, thus significantly increasing the risk of microbiological damage. The present research featured the changes in the mass fraction of moisture and water activity of individual parts of raw gingerbread with fruit filling during storage at different temperatures and relative air humidity. The samples were packed in a 40-micron polypropylene film. During storage, the mass fraction of moisture and water activity may change in various parts of the product, which can lead to their molding. In this case, starch degradation processes led to the destruction of the structure and a decrease in the content of mechanically-bound moisture, as well as to the release of ‘free’ water and an increase in water activity. As a result, the risk of molding increased significantly. The water activity increased from 0.71 to 0.79 on the sample surface after six weeks of storage at 30°C and a 40% of equilibrium relative humidity. A set of experiments in microbiological indicators revealed no signs of molding in the freshly prepared samples. After one month of storage, the amount of mold reached 10 CFU/g. The quantity of mesophilic aerobic and facultative anaerobic microorganisms in different parts of the crumb increased from 3×10 to 9×102 CFU/g and in the filling – from 1×10 to 2.3×103 CFU/g. After two months of storage, the amount of mold reached more than 103 COE/g, which greatly exceeds safety norms. As the relative air humidity increased from 30% to 40%, the moisture transfer rate between the products and the environment was reduced by half. As a result, the shelf life decreased by 1–2 weeks. The research also studied the patterns of moisture transfer processes in summer and winter conditions. The research results contribute to the development of technology and shelf life forecasting for complex flour confectionery products with intermediate moisture.

Notes on coexistence of closely related Leiobunum rupestre and L. subalpinum (Opiliones, Eupnoi, Sclerosomatidae)

Zootaxa ◽  
2021 ◽  
Vol 4984 (1) ◽  
pp. 34-42
Author(s):  
PETER KOZEL ◽  
MIHA DELAKORDA ◽  
CHRISTIAN KOMPOSCH ◽  
LJUBA SLANA NOVAK ◽  
TONE NOVAK ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Air Temperature ◽  
Regression Analyses ◽  
Air Humidity ◽  
Resting Sites ◽  
Relative Air Humidity ◽  
Preliminary Research

Two closely related, syntopic species, Leiobunum rupestre and L. subalpinum, spend the day at apparently randomly distributed resting sites. In this preliminary research, we studied differences in their microclimatic preferences at a locality in the Pohorje Mts., Slovenia. We measured air temperature and relative humidity at individual resting sites, and found that L. subalpinum occupied a slightly wider air temperature-relative humidity ecospace as compared to L. rupestre. Individuals of L. rupestre rested at more humid sites than L. subalpinum. Regression analyses revealed that the presence of L. rupestre was most likely at resting sites with air temperature in the range of 12–17°C and with relative air humidity of 98.1%. In contrast, the presence of L. subalpinum was most likely at resting sites with air temperature 23.1°C and relative air humidity in the range of 65–85%. Nevertheless, microclimatic niches of both species overlapped almost completely, indicating that niche filtering may allow the coexistence of the two species. 

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
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