scholarly journals Relationship between the Microbiome and Indoor Temperature/Humidity in a Traditional Japanese House with a Thatched Roof in Kyoto, Japan

Diversity ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 475
Author(s):  
Makoto Kokubo ◽  
So Fujiyoshi ◽  
Daisuke Ogura ◽  
Makiko Nakajima ◽  
Ayako Fujieda ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Human Health ◽  
Living Environment ◽  
Measured Temperature ◽  
Health It ◽  
Outdoor Air ◽  
Temperature And Humidity ◽  
Microbial Suppression ◽  
Negative Effect ◽  
Indoor And Outdoor

In our living environment, there are various microorganisms that are thought to affect human health. It is expected that excessive microbial suppression can have a negative effect on human health and that the appropriate control of the microbiome is beneficial to health. To understand how the physical environment, such as temperature and relative humidity, or housing itself affects the microbiome in a rural house, we measured temperature and humidity and collected microbial samples in a traditional Japanese house with a thatched roof. The relative humidity of outdoor air was over 60% most of the day throughout the year. Indoor and outdoor air temperature and humidity were closer to each other in summer than in winter. The DNA concentration of indoor surfaces correlated with the relative humidity, especially with the lowest annual relative humidity. In the thatched roof, outside surface relative humidity often reached 100%, and the occurrence of condensation can affect the DNA concentrations. A high percentage of archaea were detected in the house, which is not a common characteristic in houses. In addition, the microbial community was similar outdoors and indoors or in each room. These characteristics reflect the occupants’ behaviour, including opening the windows and partitions in summer. In the future, it will be necessary to conduct continuous surveys in various houses, including traditional and modern houses, in Japan.

scholarly journals Indoor Air Quality Investigation at Primary Classrooms in Hamirpur, Himachal Pradesh, India

2019 ◽  
Vol 24 ◽  
pp. 45-48 ◽  
Author(s):  
Venu Shree ◽  
Bhanu M. Marwaha ◽  
Pamita Awasthi
Keyword(s):  
Air Quality ◽  
Relative Humidity ◽  
Indoor Air ◽  
Himachal Pradesh ◽  
Building Performance ◽  
Outdoor Air ◽  
Primary Classrooms ◽  
Outdoor Air Quality ◽  
Hybrid Ventilation ◽  
Indoor And Outdoor

Two schools in Hamirpur (Himachal Pradesh, India) having hybrid ventilation (ceiling fan) were selected for indoor and outdoor air quality investigation. Investigated parameters include temperature, relative humidity, CO2, and PM2.5 for both indoor and outdoor air quality. The average concentrations of CO2, and PM2.5 are estimated for indoor and outdoor air quality. Result shows that adopted building performance is not good in comparison with designed ones. The indoor concentrations of various pollutants are found to be higher in comparison with outdoor, so there is an urgent need to reduce the levels of pollutants inside the primary classrooms.

scholarly journals A Biplot-Based PCA Approach to Study the Relations between Indoor and Outdoor Air Pollutants Using Case Study Buildings

Buildings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 218
Author(s):  
He Zhang ◽  
Ravi Srinivasan
Keyword(s):  
Relative Humidity ◽  
Air Pollutants ◽  
Quality Data ◽  
Outdoor Air ◽  
School Site ◽  
Outdoor Air Quality ◽  
Residential Unit ◽  
Air Quality Data ◽  
Indoor And Outdoor

The 24 h and 14-day relationship between indoor and outdoor PM2.5, PM10, NO2, relative humidity, and temperature were assessed for an elementary school (site 1), a laboratory (site 2), and a residential unit (site 3) in Gainesville city, Florida. The primary aim of this study was to introduce a biplot-based PCA approach to visualize and validate the correlation among indoor and outdoor air quality data. The Spearman coefficients showed a stronger correlation among these target environmental measurements on site 1 and site 2, while it showed a weaker correlation on site 3. The biplot-based PCA regression performed higher dependency for site 1 and site 2 (p < 0.001) when compared to the correlation values and showed a lower dependency for site 3. The results displayed a mismatch between the biplot-based PCA and correlation analysis for site 3. The method utilized in this paper can be implemented in studies and analyzes high volumes of multiple building environmental measurements along with optimized visualization.

Effect of a Filter Cover on Temperature and Humidity in a Mouse Cage

1968 ◽  
Vol 2 (2) ◽  
pp. 113-120 ◽  
Author(s):  
M. L. Simmons ◽  
D. M. Robie ◽  
J. B. Jones ◽  
L. J. Serrano
Keyword(s):  
Relative Humidity ◽  
Measured Temperature ◽  
Ambient Conditions ◽  
Fibrous Filter ◽  
Water Filter ◽  
Average Temperature ◽  
Temperature And Humidity ◽  
Cent Relative Humidity ◽  
The Mean ◽  
Heat And Moisture

To determine how a filter cap affects the heat and moisture build-up in a mouse cage, and how that build-up is affected by ambient conditions of temperature and relative humidity, 50 adult female mice were housed 10 per cage in polycarbonate cages, which were covered with a fibrous filter and sealed with a neoprene gasket and hold-down rod. The cages were placed in a chamber which controlled ambient temperature and humidity. Observations were made at 1°F intervals of temperature (68–74°F, 19.9–23.3°C) and at three different relative humidities (40, 55, and 70 per cent). Every 24 hours the chamber conditions were changed, and cages, bedding, water, filter caps, and food were replaced. Three sensors suspended just under the filter cover measured temperature and humidity and transmitted the data to a recorder. The first reading was taken after a 3-hour equilibraiion period, then every 3 hours until the next day's change. By measuring the average temperature and humidity, it was possible to study the differences between cage and ambient conditions. At 68°F (19.9°C) and 40 per cent relative humidity, the mean conditions in the cages were 72°F (22.2°C) and 50 per cent; at the upper limit of 74°F (23.3 °C) and 70 per cent, the mean cage conditions were 78°F (25.5°C) and 75 per cent.

scholarly journals Socioeconomic and Outdoor Meteorological Determinants of Indoor Temperature and Humidity in New York City Dwellings*

2013 ◽  
Vol 5 (2) ◽  
pp. 168-179 ◽  
Author(s):  
J. D. Tamerius ◽  
M. S. Perzanowski ◽  
L. M. Acosta ◽  
J. S. Jacobson ◽  
I. F. Goldstein ◽  
...  
Keyword(s):  
New York ◽  
New York City ◽  
Relative Humidity ◽  
Human Health ◽  
York City ◽  
Outdoor Temperature ◽  
Indoor Climate ◽  
Indoor Temperature ◽  
Temperature And Humidity ◽  
The Relationship

Abstract Numerous mechanisms link outdoor weather and climate conditions to human health. It is likely that many health conditions are more directly affected by indoor rather than outdoor conditions. Yet, the relationship between indoor temperature and humidity conditions to outdoor variability, and the heterogeneity of the relationship among different indoor environments are largely unknown. The authors use 5–14-day measures of indoor temperature and relative humidity from 327 dwellings in New York City New York, for the years 2008–11 to investigate the relationship between indoor climate, outdoor meteorological conditions, socioeconomic conditions, and building descriptors. Study households were primarily middle income and located across the boroughs of Brooklyn, Queens, Bronx, and Manhattan. Indoor temperatures are positively associated with outdoor temperature during the warm season and study dwellings in higher socioeconomic status neighborhoods are significantly cooler. During the cool season, outdoor temperatures have little effect on indoor temperatures; however, indoor temperatures can range more than 10°C between dwellings despite similar outdoor temperatures. Apartment buildings tend to be significantly warmer than houses and dwellings on higher floors are also significantly warmer than dwellings on lower floors. Outdoor specific humidity is positively associated with indoor specific and relative humidity, but there is no consistent relationship between outdoor and indoor relative humidity. In New York City, the relationship between indoor and outdoor temperature and humidity conditions varies significantly between dwellings. These results can be used to inform studies of health outcomes for which temperature or humidity is an established factor affecting human health. The results highlight the need for more research on the determinants of indoor climate.

scholarly journals Wireless sensor network to identify the reduction of meteorological gradients in greenhouse in subtropical conditions

2020 ◽  
Author(s):  
Thais Queiroz Zorzeto Cesar ◽  
Paulo Ademar Martins Leal ◽  
Omar Carvalho Branquinho ◽  
Felipe Antonio Moura Miranda
Keyword(s):  
Mechanical Ventilation ◽  
Relative Humidity ◽  
Air Temperature ◽  
Natural Ventilation ◽  
Horizontal Distribution ◽  
Wireless Sensor ◽  
Outdoor Air ◽  
Spatially Distributed ◽  
Meteorological Elements ◽  
Indoor And Outdoor

Spatial and temporal monitoring of temperature and relative humidity is essential for greenhouse management, therefore, wireless sensor networks (WSN) can offer crucial advantages. The objective of this work was to use a WSN to characterize and map the horizontal and vertical variability of air temperature and relative humidity inside a greenhouse using five different configurations. The configurations were based on combinations between the following actuating mechanisms: i) mechanical ventilation (by two exhaust fans); ii) natural ventilation (through the roof vent openings); iii) shading through the use of thermo-reflective screen. The WSN was designed with 45 spatially distributed measuring points, and the air temperature and relative humidity were recorded automatically every 30 seconds, for ten consecutive days, for each configuration. Our results show that the horizontal and vertical homogeneity of the meteorological elements depends on the actuating mechanism used in the greenhouse. Mechanical ventilation approximated the temperature and relative humidity of the indoor and outdoor air, with a homogeneous horizontal distribution throughout the environment. Opening the roof vent reduced vertical gradients of temperature and relative humidity. Our observations also showed that the combination of the use of roof vent openings with mechanical ventilation is an effective way to achieve horizontal homogeneity of meteorological elements.

scholarly journals Trend Analysis of Temperature and Humidity in Kwara State, Nigeria

2020 ◽  
Vol 13 (3-4) ◽  
pp. 44-50
Author(s):  
Adeniyi Adedapo
Keyword(s):  
Climate Change ◽  
Relative Humidity ◽  
Human Health ◽  
Trend Analysis ◽  
Maximum Temperature ◽  
Temperature Minimum ◽  
Significant Difference ◽  
Temperature And Humidity ◽  
Anomaly Index

Abstract This paper examines the trend analysis of temperature and relative humidity in Kwara State. Climatic data on annual mean temperature (minimum and maximum) and relative humidity for 40 years (1978-2017) were collected from Nigerian Meteorological Agency (NIMET) Ilorin. Semi-Average method, Mann- Kendull statistics and regression method were used to analyse the trend in temperature and relative humidity. The Standardized Anomaly Index (SAI) was also used to examine the changes in temperature and humidity over the period of 1978-2017. The result of the analysis indicates that temperature (minimum and maximum) and relative humidity exhibit an upward trend. This implies that temperature and relative humidity increase over the period of 1978-2017. The Mann-Kendull statistics values show that there is no significant difference in the values of temperature (minimum and maximum) and relative humidity. The result of the Standardized Anomaly Index (SAI) also revealed that the values of temperature and humidity fluctuated around the long –term mean. About 50% of the annual average relative humidity falls above the long term average while 40% of the annual mean maximum temperature falls above the long term average. It can therefore, be deduced that there is the possibility of increment in the values of temperature and relative humidity which could cause a serious challenge to human health and climate change. The study therefore, suggests that increase and fluctuations in temperature and relative humidity should be a critical factor in designing strategies to mitigate the effect of climate change on the environment and human health.

scholarly journals Effect of Insulator on Thermal Comfort in Poultry House in the Western Region of the State of Paraná

2019 ◽  
Vol 11 (3) ◽  
pp. 289
Author(s):  
Suélen C. Maino ◽  
J. A. C. Siqueira ◽  
S. N. M. De Souza ◽  
H. Mukai ◽  
R. G. R. Da Silva ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Temperature Data ◽  
The State ◽  
Western Region ◽  
Thermal Imager ◽  
Outdoor Air ◽  
Poultry House ◽  
Poultry Houses ◽  
The Western Region ◽  
Indoor And Outdoor

This work was carried out with the objective of evaluating effect of different insulation considering two poultry houses. Two dark house type, located in the western region of the State of Paran&aacute;, Brazil were analyzed. The poultry house A1 is characterized with trapezoidal aluzinc cover on the upper side interspersed with a layer of polyurethane and aluminized film on the underside, while the poultry house A2 has cover of aluzinc with black tarpaulin. A thermo-hygrometer was used to measure the temperature and relative humidity of the indoor and outdoor air, and a thermal imager was used to collect the surface temperature data of the birds. In this way, it was possible to evaluate the effect of different insulation of poultry houses on birds. Finally, was concluded that the poultry house A1 provided temperature and relative humidity and temperature of the birds closer to those considered as ideal in the literature.

Indoor and outdoor air quality monitoring in hemp house — Case study

2011 ◽  
Vol 6 (3) ◽  
pp. 63-72 ◽  
Author(s):  
Jarmila Rimbalová ◽  
Silvia Vilčeková ◽  
Adriana Eštoková
Keyword(s):  
Air Quality ◽  
Quality Monitoring ◽  
Air Quality Monitoring ◽  
Outdoor Air ◽  
Outdoor Air Quality ◽  
Indoor And Outdoor

scholarly journals The fragranced products phenomenon: air quality and health, science and policy

2020 ◽  
Author(s):  
Anne Steinemann
Keyword(s):  
Air Quality ◽  
Human Health ◽  
Consumer Products ◽  
Health Science ◽  
Future Research ◽  
Research Directions ◽  
Science And Policy ◽  
New Findings ◽  
Future Research Directions ◽  
Indoor And Outdoor

Abstract Fragrance is used in consumer products around the world. However, fragrance has been associated with adverse effects on indoor and outdoor air quality and human health. Questions arise, such as the following: Why does fragrance in products pose problems? What are sources of emissions and exposures? What are health and societal effects? What are possible solutions? This paper examines the issue of fragranced consumer products and its science and policy dimensions, with a focus on the implications for air quality and human health. Results include new findings and new questions for future research directions.

Sign in / Sign up

Export Citation Format

Share Document