Evaluation of Thermal Comfort of Fabrics Using a Controlled-Environment Chamber

2012 ◽  
pp. 108-128 ◽  
Author(s):  
John D. Pierce ◽  
Stephen S. Hirsch ◽  
Sara Beth Kane ◽  
John A. Venafro ◽  
Carole A. Winterhalter
Keyword(s):  
Thermal Comfort ◽  
Controlled Environment ◽  
Environment Chamber

Evaluation of Thermal Comfort of Fabrics Using a Controlled-Environment Chamber

2012 ◽  
pp. 1-21 ◽  
Author(s):  
John D. Pierce ◽  
Stephen S. Hirsch ◽  
Sara Beth Kane ◽  
John A. Venafro ◽  
Carole A. Winterhalter
Keyword(s):  
Thermal Comfort ◽  
Controlled Environment ◽  
Environment Chamber

TOLERANCE OF EARLY-MATURING SOYBEAN CULTIVARS TO METRIBUZIN

1986 ◽  
Vol 66 (1) ◽  
pp. 125-130 ◽  
Author(s):  
G. H. FRIESEN ◽  
D. A. WALL
Keyword(s):  
Sandy Loam ◽  
Controlled Environment ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Soybean Cultivars ◽  
Early Maturing ◽  
Glycine Max L ◽  
Loam Soil ◽  
Environment Chamber ◽  
Chamber Studies

McCall, Maple Presto, Maple Amber and OT80-3 soybean (Glycine max (L.) Merr.) cultivars were evaluated under field conditions for their response to metribuzin. Maple Amber was found to be less tolerant than the other cultivars. In controlled environment chamber studies, injury to this cultivar was more severe on a sandy loam soil than on a clay loam soil. Fall applications of metribuzin, alone or tank-mixed with trifluralin, were tolerant to Maple Amber soybeans and such applications may offer a practical alternative to spring treatments for broad spectrum weed control in the less tolerant soybean cultivars grown in Manitoba.Key words: Metribuzin, trifluralin, preplant incorporation, fall treatments, soybean cultivars

Humidity Effects on Porous Silica Thin Films

1995 ◽  
Vol 411 ◽  
Author(s):  
J. R. Kokan ◽  
R. A. Gerhardt
Keyword(s):  
Thin Films ◽  
Ac Conductivity ◽  
Sol Gel ◽  
Porous Silica ◽  
Controlled Environment ◽  
Alkali Ions ◽  
Humidity Effects ◽  
Silica Thin Films ◽  
Environment Chamber ◽  
Humidity Sensitivity

ABSTRACTImpedance Spectroscopy is being used to study the humidity sensitivity of porous silica thin films. The films are processed via a colloidal sol-gel method which leaves some remnant potassium and sodium. Previous work on bulk porous silica samples processed by the same method showed that the dielectric properties and ac conductivity were very sensitive to changes in humidity. The aim of this work was to determine if the same dependencies could be found in the thin films. The capacitance, dielectric loss, and ac conductivity of the films were measured in a controlled environment chamber from 20–80% RH for frequencies ranging from 10Hz–10MHz. In addition to characterizing films with varying amounts of residual alkali ions obtained through leaching, we have also measured films that were surface doped with controlled amounts of KCl, LiCl, or NaCl. Relative humidity dependencies in the films are not as dramatic as in the bulk samples. The reasons for this behavior are not yet clear, but may be associated with the porosity, thickness, and surface area of the films.

Combination Effects of Low Rates of Fluridone and Bentazon

1987 ◽  
Vol 1 (2) ◽  
pp. 168-170
Author(s):  
J. P. Sterrett
Keyword(s):  
Cirsium Arvense ◽  
Growth Chamber ◽  
Controlled Environment ◽  
Cyperus Esculentus ◽  
Canada Thistle ◽  
Combination Effects ◽  
Yellow Nutsedge ◽  
Environment Chamber

The response of yellow nutsedge (Cyperus esculentusL. #3CYPES) and Canada thistle [Cirsium arvense(L.) Scop. # CIRAR] to combinations of low rates of fluridone {1-methyl-3-phenyl-5-[3-(trifluoromethyl)phenyl]-4(1H)-pyridinone} and bentazon [3-(1-methylethyl)-(1H)-2,l,3-benzothiadiazin-4(3H)-one 2,2-dioxide] was determined in a controlled environment chamber and on Canada thistle in the field. In the growth chamber, injury to yellow nutsedge was increased with 24 g ai/ha fluridone combined with 323 g ai/ha bentazon. Either 2.7 or 5.4 g/ha fluridone combined with 27 g/ha bentazon caused uniform injury to Canada thistle. In the field, the combinations of 5.6 g/ha fluridone with either 28 or 2800 g/ha bentazon was phytotoxic to Canada thistle.

Adaptation to short-term respiratory effects of ozone in men exposed repeatedly

1977 ◽  
Vol 43 (1) ◽  
pp. 82-85 ◽  
Author(s):  
J. D. Hackney ◽  
W. S. Linn ◽  
J. G. Mohler ◽  
C. R. Collier
Keyword(s):  
Air Pollution ◽  
Physiological Responses ◽  
Controlled Environment ◽  
Acute Effects ◽  
Short Term ◽  
Respiratory Effects ◽  
Ambient Pollution ◽  
Environment Chamber ◽  
Air Pollution Episodes ◽  
Pollution Episodes

To investigate whether adaptation which modifies some acute effects of ozone (O3) exposure can develop in humans, six male volunteers with respiratory hyperreactivity were exposed in a controlled environment chamber to 0.5 ppm O3 2h/day for 4 successive days under conditions stimulating ambient pollution exposures. One subject showed little measurable response, while five showed function decrement on exposure days 1–3 which was largely reversed by day 4. Symptom responses generally paralleled the physiological responses. These results suggest that at least some humans adapt to O3 exposure at concentrations occurring in severe community air pollution episodes, to the extent that obvious acute respiratory effects are prevented. Other adverse effects of O3 may not be prevented by this adaptation.

Effect of Temperature on Response of Tomatoes to Several Dinitroaniline Herbicides and Phosphorus

Weed Science ◽  
1976 ◽  
Vol 24 (1) ◽  
pp. 115-119 ◽  
Author(s):  
H. P. Wilson ◽  
F. B. Stewart ◽  
T. E. Hines
Keyword(s):  
High Temperatures ◽  
Phosphorus Content ◽  
Dry Weight ◽  
Field Studies ◽  
Effect Of Temperature ◽  
Controlled Environment ◽  
Effects Of Temperature ◽  
Environment Chamber ◽  
Chamber Studies ◽  
Dinitroaniline Herbicides

Effects of temperature on response of transplanted tomatoes (Lycopersicon esculentumMill. ‘Campbell 17′) to trifluralin (α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine), nitralin [4-(methylsulfonyl)-2,6-dinitro-N,N-dipropylaniline], profluralin [N-(cyclopropylmethyl)-α,α,α-trifluoro-2,6-dinitro-N-propyl-p-toluidine], and isopropalin (2,6-dinitro-N,N-dipropylcumidine) were investigated in field studies. Trifluralin and nitralin caused greater reductions in growth and yields of tomatoes transplanted early in April than to tomatoes transplanted around May 1. Responses to profluralin were similar but total yields of early transplanted tomatoes were not reduced although initial yields were below those of tomatoes treated with isopropalin. In controlled environment chamber studies, percent phosphorus of plant tops was reduced by trifluralin at low temperatures but was not influenced by trifluralin at high temperatures. Tomoto responses to phosphorus as reflected by plant fresh weight, dry weight and phosphorus content (mg/plant) were reduced by trifluralin at low and high temperatures.

scholarly journals The Controlled-Environment Chamber: A New Mouse Model of Dry Eye

2005 ◽  
Vol 46 (8) ◽  
pp. 2766 ◽  
Author(s):  
Stefano Barabino ◽  
LinLing Shen ◽  
Lu Chen ◽  
Saadia Rashid ◽  
Maurizio Rolando ◽  
...  
Keyword(s):  
Mouse Model ◽  
Dry Eye ◽  
Controlled Environment ◽  
Environment Chamber

Development of a Controlled-environment Chamber for Studying the Epidemiology of Fungal Pathogens

1996 ◽  
Vol 65 (1) ◽  
pp. 51-61
Author(s):  
T. Boulard ◽  
M. Mermier ◽  
C. Fauvel ◽  
P. Nicot ◽  
A. Lecomte
Keyword(s):  
Fungal Pathogens ◽  
Controlled Environment ◽  
Environment Chamber

scholarly journals Hyperlocal Variation in Soil Iron and Rhizosphere Microbiome Determines Disease Development in Amenity Turfgrass

2020 ◽  
Author(s):  
Ming-Yi Chou ◽  
Smita Shrestha ◽  
Renee Rioux ◽  
Paul Koch
Keyword(s):  
Soil Properties ◽  
Bulk Soil ◽  
Controlled Environment ◽  
Rrna Gene ◽  
Disease Development ◽  
Dollar Spot ◽  
Rhizosphere Microbiome ◽  
Environment Chamber ◽  
Plant Pathosystems ◽  
Important Disease

ABSTRACTDollar spot, caused by the fungal pathogen Clarireedia spp., is an economically important disease of amenity turfgrass in temperate climates worldwide. This disease often occurs in a highly variable manner, even on a local scale with relatively uniform environmental conditions. The objective of this study was to investigate mechanisms behind this local variation, focusing on contributions of the soil and rhizosphere microbiome. Turfgrass, rhizosphere, and bulk soil samples were taken from within a 256 m2 area of healthy turfgrass, transported to a controlled environment chamber, and inoculated with C. jacksonii. Bacterial communities were profiled targeting the 16s rRNA gene, and 16 different soil chemical properties were assessed. Despite their initial uniform appearance, the samples differentiated into highly susceptible and moderately susceptible groups following inoculation in the controlled environment chamber. The highly susceptible samples harbored a unique rhizosphere microbiome with lower relative abundance of antibiotic-producing bacterial taxa and higher predicted abundance of genes associated with xenobiotic biodegradation pathways. In addition, stepwise regression revealed that bulk soil iron content was the only significant soil characteristic that positively regressed with decreased dollar spot susceptibility during the peak disease development stage. These findings suggest that localized variation in soil iron induces the plant to select for a particular rhizosphere microbiome that alters the disease outcome. More broadly, further research in this area may indicate how plot-scale variability in soil properties can drive variable plant disease development through alterations in the rhizosphere microbiome.IMPORTANCEDollar spot is the most economically important disease of amenity turfgrass, and more fungicides are applied targeting dollar spot than any other turfgrass disease. Dollar spot symptoms are small (3-5 cm), circular patches that develop in a highly variable manner within plot-scale even under seemingly uniform conditions. The mechanism behind this variable development is unknown. This study observed that differences in dollar spot development over a 256 m2 area were associated with differences in bulk soil iron concentration and correlated with a particular rhizosphere microbiome. These findings provide important clues for understanding the mechanisms behind the highly variable development of dollar spot, which may offer important clues for innovative control strategies. Additionally, these results also suggest that small changes in soil properties can alter plant activity and hence the plant-associated microbial community which has important implications for a broad array of important agricultural and horticultural plant pathosystems.

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