Interactive Effects of Low-oxygen Atmospheres, Relative Humidity, and Temperature on Mortality of Two Stored-product Moths (Lepidoptera: Pyralidae)

1986 ◽  
Vol 79 (5) ◽  
pp. 1303-1306 ◽  
Author(s):  
Edwin L. Soderstrom ◽  
Bruce E. Mackey ◽  
David G. Brandl
Keyword(s):  
Relative Humidity ◽  
Interactive Effects ◽  
Low Oxygen ◽  
Lepidoptera Pyralidae

scholarly journals The effect of substrate wettability and modulus on gecko and gecko-inspired synthetic adhesion in variable temperature and humidity

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Christopher T. Mitchell ◽  
Cem Balda Dayan ◽  
Dirk-M. Drotlef ◽  
Metin Sitti ◽  
Alyssa Y. Stark
Keyword(s):  
Relative Humidity ◽  
Variable Temperature ◽  
Dominant Role ◽  
Interactive Effects ◽  
Gekko Gecko ◽  
Relative Contribution ◽  
Capillary Adhesion ◽  
High Adhesion ◽  
Gecko Adhesion ◽  
Adhesive Performance

AbstractGecko adhesive performance increases as relative humidity increases. Two primary mechanisms can explain this result: capillary adhesion and increased contact area via material softening. Both hypotheses consider variable relative humidity, but neither fully explains the interactive effects of temperature and relative humidity on live gecko adhesion. In this study, we used live tokay geckos (Gekko gecko) and a gecko-inspired synthetic adhesive to investigate the roles of capillary adhesion and material softening on gecko adhesive performance. The results of our study suggest that both capillary adhesion and material softening contribute to overall gecko adhesion, but the relative contribution of each depends on the environmental context. Specifically, capillary adhesion dominates on hydrophilic substrates, and material softening dominates on hydrophobic substrates. At low temperature (12 °C), both capillary adhesion and material softening likely produce high adhesion across a range of relative humidity values. At high temperature (32 °C), material softening plays a dominant role in adhesive performance at an intermediate relative humidity (i.e., 70% RH).

scholarly journals Interaction Effects of Air Pollution and Climatic Factors on Circulatory and Respiratory Mortality in Xi’an, China between 2014 and 2016

2020 ◽  
Vol 17 (23) ◽  
pp. 9027
Author(s):  
Kingsley Katleho Mokoena ◽  
Crystal Jane Ethan ◽  
Yan Yu ◽  
Asenso Theophilus Quachie
Keyword(s):  
Air Pollution ◽  
Time Series ◽  
Relative Risk ◽  
Relative Humidity ◽  
Quality Index ◽  
Climatic Factors ◽  
Interaction Effects ◽  
Interactive Effects ◽  
Respiratory Mortality ◽  
Distributed Lag

Several studies have reported that air pollution and climatic factors are major contributors to human morbidity and mortality globally. However, the combined interactive effects of air pollution and climatic factors on human health remain largely unexplored. This study aims to investigate the interactive effects of air pollution and climatic factors on circulatory and respiratory mortality in Xi’an, China. Time-series analysis and the distributed lag non-linear model (DLNM) were employed as the study design and core statistical method. The interaction relative risk (IRR) and relative excess risk due to interaction (RERI) for temperature and Air Quality Index (AQI) interaction on circulatory mortality were 0.973(0.969, 0.977) and −0.055(−0.059, −0.048), respectively; while for relative humidity and AQI interaction, 1.098(1.011, 1.072) and 0.088(0.081, 0.107) respectively, were estimated. Additionally, the IRR and RERI for temperature and AQI interaction on respiratory mortality were 0.805(0.722, 0.896) and −0.235(−0.269, −0.163) respectively, while 1.008(0.965, 1.051) and −0.031(−0.088, 0.025) respectively were estimated for relative humidity and AQI interaction. The interaction effects of climatic factors and AQI were synergistic and antagonistic in relation to circulatory and respiratory mortality, respectively. Interaction between climatic factors and air pollution contributes significantly to circulatory and respiratory mortality.

Microbial Control by Low Oxygen and Low Relative Humidity Environment

1990 ◽  
Vol 35 (4) ◽  
pp. 222 ◽  
Author(s):  
Nieves Valentin ◽  
Mary Lidstrom ◽  
Frank Preusser
Keyword(s):  
Relative Humidity ◽  
Microbial Control ◽  
Low Oxygen ◽  
Humidity Environment

scholarly journals Temperature and relative humidity requirements for conidiogenesis of Beauveria bassiana (Deuteromycetes: Moniliaceae)

2000 ◽  
Vol 29 (3) ◽  
pp. 515-521 ◽  
Author(s):  
Daniel R. Sosa-Gómez ◽  
Sérgio B. Alves
Keyword(s):  
Relative Humidity ◽  
Beauveria Bassiana ◽  
Host Species ◽  
Fungal Isolate ◽  
Host Stage ◽  
Lepidoptera Pyralidae ◽  
Mathematical Equations ◽  
C 30 ◽  
Different Levels ◽  
Piezodorus Guildinii

Assays were conducted to assess the number of Beauveria bassiana (Bals.) Vuill. conidia on Diatraea saccharalis F. (Lepidoptera: Pyralidae), Nezara viridula (L.) and Piezodorus guildinii (Westwood) (Hemiptera: Pentatomidae) corpses maintained at different levels of relative humidity (RH) (75%, 80%, 85%, 90% and 100%) and temperatures (22°C, 26°C, 30°C and 34°C) during five days. The isolates produced conidia when exposed to RH from 75% to 100%. Conidiogenesis was incipient at 75% RH on D. saccharalis larvae, but did not occur on N. viridula and P. guildinii. In ideal conditions of RH and during 10 days, mathematical equations were developed to estimate the number of conidia produced by isolates ARSEF 933 and ARSEF 2515. Conidia number were shown to be dependant on RH, temperature, fungal isolate, host species, host stage, and time

Laboratory studies of Blattisocius keegani (Fox) (Acari: Ascidae) reared on eggs of navel orangeworm: potential for biological control

2010 ◽  
Vol 101 (5) ◽  
pp. 499-504 ◽  
Author(s):  
H.Q. Thomas ◽  
F.G. Zalom ◽  
N.L. Nicola
Keyword(s):  
Biological Control ◽  
Relative Humidity ◽  
Egg Laying ◽  
Laboratory Studies ◽  
Amyelois Transitella ◽  
Navel Orangeworm ◽  
Stored Product Pests ◽  
The Family ◽  
Lepidoptera Pyralidae ◽  
C 30

AbstractBlattisocius keegani (Fox) is a predatory mite in the family Ascidae (Acari), noted for potential biological control of Coleopteran stored product pests. Performance of B. keegani on eggs of navel orangeworm, Amyelois transitella Walker (Lepidoptera: Pyralidae), was investigated. Mites completed development from egg to adult in 9.2±0.22 days at 25°C and 50–60% relative humidity, and in 6.33±0.29 days at 32.2°C, 30% relative humidity. Mites provisioned with three or five eggs consumed a median of 1.25 to 1.5 eggs, with a maximum of three eggs consumed over 24 h. Regression analyses indicated egg-laying by B. keegani was significantly correlated with the number of A. transitella eggs consumed, and female mites laid an average of 5.82±0.44 eggs over 72 h. Blattisocius keegani, developed on fresh and frozen eggs, laid significantly more eggs when provided with fresh eggs (F3,26=6.16, P=0.0026) and were able to develop on frozen Ephestia kuehniella Zeller (Lepidoptera: Pyralidae) eggs as an alternative host. Mites were equally fecund when fed eggs stored at 0° or −20°C. Provisioning of adult moth bodies in addition to egg prey items increased mite fecundity, although it was demonstrated that B. keegani are phoretic on adult moths as well. The results are the first experimental evidence of B. keegani as a predator of Lepidopteran eggs, as a phoretic species, and of their potential for biological control of navel orangeworm.

Interactive effects between Temperature and Humidity on Outpatient Visits of Respiratory Diseases in Lanzhou, China

2021 ◽  
Author(s):  
Hua He ◽  
Guorong Chai ◽  
Yana Su ◽  
Yongzhong Sha ◽  
Shengliang Zong ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Low Temperature ◽  
Linear Models ◽  
Interactive Effect ◽  
Interactive Effects ◽  
Chronic Obstructive ◽  
Upper Respiratory Tract ◽  
Outpatient Visits ◽  
Different Types ◽  
Temperature And Humidity

AbstractThis study assessing the lag and interactive effects between the daily average temperature and relative humidity on respiratory disease (RD) morbidity in Lanzhou, China, using data from daily outpatient visits for RD between 2014 and 2017, and meteorological and pollutant data during the same period analysed with Poisson Generalized Linear Model and Distributed Lag Non-linear Models, the effects are further explored by classifying the RD by gender, age and disease type. The results showed that the temperature and relative humidity on outpatient visits of different populations and types of RD is nonlinear, with a significant lag effect. Relative to 11°C, every 1°C decrease in temperature is associated with 10.98% (95% Confidence interval (CI): 9.87%–12.11%) increase for total RD. Chronic obstructive pulmonary disease is affected only by low temperature, upper respiratory tract infection is affected by both low and high temperatures, and asthma is influenced by high temperature. When the relative humidity is less than 32%, every 1% decrease in relative humidity is associated with 6.00% (95% CI: 3.00%–9.11%) increase for total RD, relative humidity has different effects on the outpatient risk of different types of RD. Meanwhile, temperature and relative humidity have an obvious interactive effect on different types and populations of RD, when both temperature and humidity are at low levels, the higher the number of outpatient visits for RD. When the relative humidity is ≤50% and the temperature is ≤11°C, total RD outpatient visits increases by 4.502% for every 1°C drop in temperature; that is, dry environment with low temperature has the most significant impact on RD.

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