Results 211 to 220 of about 29,184 (251)
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Heat stress in cows at pasture and benefit of shade in a temperate climate region
International Journal of Biometeorology, 2017Under temperate climates, cattle are often at pasture in summer and are not necessarily provided with shade. We aimed at evaluating in a temperate region (Belgium) to what extent cattle may suffer from heat stress (measured through body temperature, respiration rate and panting score, cortisol or its metabolites in milk, and feces on hot days) and at ...
I Veissier +2 more
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American Journal of Botany, 2023
AbstractPremiseClimate change may lead to C stress (negative C balance) in trees. Because nonstructural carbohydrates (NSC) are required during metabolic reactivation in the spring, C stress might delay budbreak timing. This effect is expected to be greater in shade‐intolerant than in shade‐tolerant species, owing to the faster C economy in the shade ...
Frida I. Piper, Alex Fajardo
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AbstractPremiseClimate change may lead to C stress (negative C balance) in trees. Because nonstructural carbohydrates (NSC) are required during metabolic reactivation in the spring, C stress might delay budbreak timing. This effect is expected to be greater in shade‐intolerant than in shade‐tolerant species, owing to the faster C economy in the shade ...
Frida I. Piper, Alex Fajardo
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Flowers that self‐shade reduce heat stress and pollen limitation
American Journal of Botany, 2023AbstractPremisePlants are facing increased risk of heat stress with global climate change. Reproductive tissues are particularly heat‐sensitive, which can result in lower plant fitness. Floral shading and closure are possible mechanisms to limit heat stress although most previous work on petal orientation has considered adaptations to raise ...
Richard Karban +2 more
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Indicators of Heat Stress in Shaded and Non-Shaded Feedlot Cattle
2004, Ottawa, Canada August 1 - 4, 2004, 2004Heat stress in feedlot cattle can cause decreases in feed intake and growth, and in extreme cases may result in death. Providing shade during hot weather has shown inconsistent results, reducing direct and indirect losses in some areas of the United States, but not in others.
null T.M. Brown-Brandl +3 more
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Responses of the photosynthetic characteristics of summer maize to shading stress
Journal of Agronomy and Crop Science, 2023AbstractThe vast majority of the energy and substance required for maize growth and development and related metabolic processes come from the photosynthesis of leaves. Over the past 60 years, the amount of solar radiation reaching the earth's surface has decreased significantly, reducing the photosynthetic rate of crops and leading to a significant ...
Zhi‐Chao Sun +5 more
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Shade Avoidance Influences Stress Tolerance in Maize
Weed Science, 2011Previous studies have suggested that the reduction in the root/shoot ratio that accompanies the shade avoidance response may reduce the tolerance of individuals to subsequent nutrient or moisture limitations. In this work, we examined the impact of the shade avoidance response on maize seedling growth and development and the response of these plants to
Eric R. Page +4 more
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Characterizing stress in shaded and unshaded feedlot heifers
2012 Dallas, Texas, July 29 - August 1, 2012, 2012Extreme summertime conditions can have negative impacts on growth, performance, and can cause death in vulnerable animals. A study was conducted over a three-year period to evaluate the characteristics that contribute to heat stress. Three hundred eighty four feedlot heifers of four distinct breeds/composites were selected based on their coat color and
null T M Brown-Brandl, null D D Jones
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Heat stress in cattle and the effect of shade on production and behaviour: a review
Australian Journal of Experimental Agriculture, 1994At high temperatures, evaporative cooling is the principal mechanism for heat dissipation in cattle. It is influenced by humidity and wind speed and by physiological factors such as respiration rate, and density and activity of sweat glands. Following exposure to heat, cattle appear to acclimatise within 2-7 weeks.
Blackshaw, Judith K., Blackshaw, A. W.
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Shades of Dry — Curing Urinary Stress Incontinence
New England Journal of Medicine, 2007Urinary incontinence is a common condition affecting 20 to 40% of older women.1 The two most common types of urinary incontinence are stress incontinence, the involuntary loss of urine resulting from increased abdominal pressures (such as with a cough or Valsalva's maneuver), and urge incontinence, the involuntary loss of urine after an unwanted ...
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Still-shade-temperature meter for use in assessing personnel cold stress
Medical & Biological Engineering & Computing, 1980A battery-operated meter to indicate the Burton still-shade temperature is described. It combines into one reading the effects on human heat loss of air temperature, wind and radiant exchange. A transistor and two diodes sense these parameters, producing voltages which are summed with appropriate weights by an operational amplifier to cause ...
L, MacHattie, L, Kuehn
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