Heat Stress Effects of a Navy/USMC vs. Army Aviator Ensemble in a UH-6O Helicopter Simulator

1998 ◽  
Author(s):  
Matthew J. Reardon ◽  
E. B. Fraser ◽  
Lawrence Katz ◽  
Patricia LeDuc ◽  
Pooria Morovati
Keyword(s):  
Heat Stress ◽  
Stress Effects

scholarly journals Nutritional strategies to alleviate heat stress effects through feed restrictions and feed additives (vitamins and minerals) in broilers under summer conditions

2019 ◽  
Vol 7 (3) ◽  
pp. 123-131 ◽  
Author(s):  
Mohamed Abdelhameed Salah Abdelhameed ◽  
◽  
Lozovskiy Alexander Robertovich ◽  
Ali Amany Muhammad Ahmed ◽  
◽  
...  
Keyword(s):  
Heat Stress ◽  
Feed Additives ◽  
Stress Effects ◽  
Nutritional Strategies

Heat stress effects on source–sink relationships and metabolome dynamics in wheat

2019 ◽  
Vol 71 (2) ◽  
pp. 543-554 ◽  
Author(s):  
Mostafa Abdelrahman ◽  
David J Burritt ◽  
Aarti Gupta ◽  
Hisashi Tsujimoto ◽  
Lam-Son Phan Tran
Keyword(s):  
Heat Stress ◽  
High Temperature ◽  
Negative Impact ◽  
Grain Filling ◽  
Wheat Breeding ◽  
Wheat Genotypes ◽  
Stress Effects ◽  
Wide Range ◽  
High Yields ◽  
Source Sink

Abstract Crops such as wheat (Triticum spp.) are predicted to face more frequent exposures to heat stress as a result of climate change. Increasing the yield and sustainability of yield under such stressful conditions has long been a major target of wheat breeding, and this goal is becoming increasingly urgent as the global population increases. Exposure of wheat plants in their reproductive or grain-filling stage to high temperature affects the duration and rate of grain filling, and hence has a negative impact on wheat productivity. Therefore, understanding the plasticity of the response to heat stress that exists between wheat genotypes, especially in source–sink relationships at the reproductive and grain-filling stages, is critical for the selection of germplasm that can maintain high yields under heat stress. A broad understanding of metabolic dynamics and the relationships between metabolism and heat tolerance is required in order to achieve this goal. Here, we review the current literature concerning the effects of heat stress on sink–source relationships in a wide range of wheat genotypes, and highlight the current metabolomic approaches that are used to investigate high temperature responses in wheat.

scholarly journals Prior heat stress effects fatigue recovery of the elbow flexor muscles

2011 ◽  
Vol 44 (1) ◽  
pp. 115-125 ◽  
Author(s):  
Masaki Iguchi ◽  
Richard K. Shields
Keyword(s):  
Heat Stress ◽  
Elbow Flexor ◽  
Stress Effects ◽  
Flexor Muscles ◽  
Elbow Flexor Muscles ◽  
Fatigue Recovery

Heat-Stress effects on the myosin heavy chain phenotype of rat soleus fibers during the early stages of regeneration

2015 ◽  
Vol 52 (6) ◽  
pp. 1047-1056 ◽  
Author(s):  
Yasuharu Oishi ◽  
Roland R. Roy ◽  
Tomonori Ogata ◽  
Yoshinobu Ohira
Keyword(s):  
Heat Stress ◽  
Myosin Heavy Chain ◽  
Heavy Chain ◽  
Stress Effects ◽  
Early Stages

scholarly journals Expression Profiling of Heat Stress Effects on Mice Fed Ergot Alkaloids

2006 ◽  
Vol 95 (1) ◽  
pp. 89-97 ◽  
Author(s):  
Sachin Bhusari ◽  
Zhilin Liu ◽  
Leonard B. Hearne ◽  
Donald E. Spiers ◽  
William R. Lamberson ◽  
...  
Keyword(s):  
Heat Stress ◽  
Expression Profiling ◽  
Ergot Alkaloids ◽  
Stress Effects

scholarly journals MITIGATION OF HEAT STRESS EFFECTS ON POTATO GROWTH BY CALCIUM AND NITROGEN APPLICATION DURING STRESS

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 596f-596 ◽  
Author(s):  
Ahmed A. Tawfik ◽  
Jiwan P. Palta
Keyword(s):  
Heat Stress ◽  
Sandy Loam ◽  
Leaf Tissue ◽  
Maximum Temperature ◽  
N Application ◽  
Total N ◽  
Stress Effects ◽  
Loam Soil ◽  
Potato Growth ◽  
The Impact

The optimum temperature regime for Solanum tuberosum cv. Russet Burbank is usually 20/15°C day/night. We studied the impact of heat stress (30/25°C, day/night) on the growth of this heat sensitive cultivar under controlled conditions (UW-Biotron). Plants were grown in sandy-loam soil which tested at 1500 Kg/ha Ca. Plants were at the maximum temperature for 6h during the middle of the day with a photoperiod of 14 hrs. All pots received identical amounts of total N (rate: 225 Kg N ha1.). The treatments were: (1) NSN: non-split N (N application 1/2 emergence, 1/2 two wks later): (2) SPN: split-N (1/2 emergence 1/6 at 2, 5 and 8 wks later); (3) SPN+Ca: Split-N+Ca (Ca at 2, 5 and 8 wks after emergence, total Ca from CaNO3 was 113 Kg ha1). Total leaf FWT and DWT was significantly reduced in NS treatment by heat stress at 13 wks as compared to optimum conditions. However, this was not reduced in SPN and SPN+Ca. Under heat stress: (a) SPN + Ca gave the highest leaf FWT and DWT, stomatal conductance, transpiration rate, and leaflet tissue Ca content; (b) Young expanding leaflets gave higher growth rate with SPN and SPN + Ca than NSN; (c) Ca content of mature leaflet decreased progressively in both NSN and SPN but not in SPN + Ca. Our results show that application of Ca and N during heat stress can mitigate stress effects and that maintenance of a certain level of calcium in leaf tissue is important under heat stress.

Shade access in combination with sprinkling and ventilation effects performance of Holstein cows in early and late lactation

2019 ◽  
Vol 59 (2) ◽  
pp. 347 ◽  
Author(s):  
Lorena Román ◽  
Celmira Saravia ◽  
Laura Astigarraga ◽  
Oscar Bentancur ◽  
Alejandro La Manna
Keyword(s):  
Heat Stress ◽  
Block Design ◽  
Mitigation Strategies ◽  
Holstein Cows ◽  
Stress Effect ◽  
Early Lactation ◽  
Stress Effects ◽  
Negative Effect ◽  
Humidity Index ◽  
Two Stages

The negative effect of heat stress on dairy cows, with a temperature humidity index (THI) over 72, has been extensively studied. However, there are few studies on THI values under 72 that compare the effect of heat stress in different lactation stages. The objective of this study was to determine the heat stress effect on two lactation stages with a THI below the threshold 72. Thirty-nine multiparous, non-pregnant Holstein cows with more than 30 kg/cow.day of solid-corrected milk were used in a randomised complete block design to evaluate six treatments. The experimental design had a 3 by 2 factorial arrangement with three heat stress mitigation strategies: No shade (CON), access to shade only, and access to shade combined with sprinkling and ventilation, and two stages of lactation: early (S1) and late (S2), 12 ± 10.3 and 201 ± 45.8 days in milk respectively, for a duration of 81 consecutive days. All treatments, except CON had access to artificial shade from 0900 hours to 0500 hours next day. From 0500 hours to 0900 hours all cows were managed together in a grazing session. Additionally, sprinkling and ventilation cows had two 30-min sessions of ventilation and spray (0900 hours, 1530 hours). The average THI was 70.1 ± 4.46 (minimum THI: 60.4; maximum THI: 81.7) and the average hours above 72 were 7.8 ± 5.98. Animals in S1 presented higher solids-corrected milk reduction (P < 0.0001; 5.4 and 1.9 kg/cow.day), and protein yield (<0.0001; 0.13 and 0.54 kg/cow.day) than animals in S2 when shade was not allowed (CON). It was concluded that under these conditions, animal productivity is more negatively affected in early lactation animals. The use of shade with or without spray and ventilation mitigates heat stress effects on both stages of lactation.

Sign in / Sign up

Export Citation Format

Share Document