Results 61 to 70 of about 848,646 (303)

Hypoxic preacclimatization combining intermittent hypoxia exposure with physical exercise significantly promotes the tolerance to acute hypoxia

Frontiers in Physiology
Background: Both hypoxia exposure and physical exercise before ascending have been proved to promote high altitude acclimatization, whether the combination of these two methods can bring about a better effect remains uncertain.
Jiaxin Xie, Shenwei Xie, Zhifeng Zhong, Huaping Dong, Pei Huang, Simin Zhou, Huaijun Tian, Jijian Zhang, Yu Wu, Peng Li   +9 more
doaj   +1 more source

Local adaptation with high gene flow: temperature parameters drive adaptation to altitude in the common frog (Rana temporaria) [PDF]

, 2014
Both environmental and genetic influences can result in phenotypic variation. Quantifying the relative contributions of local adaptation and phenotypic plasticity to phenotypes is key to understanding the effect of environmental variation on populations.
Biek, R., Mable, B.K., Muir, A.P., Thomas, R.   +3 more
core   +2 more sources

Adapting to Changing Rainfall and Developing Off‐Farm Employment: Implications for the Adoption of Direct Seeding in Rice Production

Applied Economic Perspectives and Policy, EarlyView.
ABSTRACT Rice is the main staple food for more than half of the world's population and the income from rice is an essential source for livelihoods of millions of households. We examine whether direct seed in rice production is an adaptation of rice farmers to rainfall changes and farm labor scarcity.
Manh Hung Do
wiley   +1 more source

Altitude hypoxia and hypoxemia: pathogenesis and management

Signal Transduction and Targeted Therapy
At high altitudes, which typically exceed 2500 m, approximately 80 million people reside permanently, with over a million visitors annually. The primary effect of high altitude is hypobaric hypoxia, which leads to decreased oxygen availability and a ...
Chunmei Cai, Guohua Ni, Lei Chen, Cheng Deng, Shengjun Chai, Rui Wang, Rong Zhang, Fengming Luo, Ri-Li Ge   +8 more
doaj   +1 more source

Auger spectroscopy of stratospheric particles : the influence of aerosols on interplanetary dust [PDF]

, 1985
Particle collections from the stratosphere via either the JSC Curatorial Program or the U2 Program (NASA Ames) occur between 16km and 19km altitude and are usually part of ongoing experiments to measure parameters related to the aerosol layer.
Mackinnon, Ian D.R., Mogk, David W., Rietmeijer, Frans J.M.   +2 more
core   +1 more source

The Bitter Taste of Brazil's Temporary Import Ban on Robusta Coffee

Agribusiness, EarlyView.
ABSTRACT Brazil, a leading Robusta coffee producer and exporter, faced a significant drought in 2016–2017, which drastically reduced production and depleted stocks. Consequently, Brazil temporarily permitted the import of one million 60‐kg bags of Robusta coffee in the spring 2017. An import ban was imposed shortly afterward due to lobbying by domestic
Hanifi Otgun, John Beghin, Fernando Maximiliano   +2 more
wiley   +1 more source

Tumor cell-derived EMP1 is essential for cancer-associated fibroblast infiltration in tumor microenvironment of triple-negative breast cancer

Cell Death and Disease
The role of epithelial membrane protein 1 (EMP1) in tumor microenvironment (TME) remodeling has not yet been elucidated. In addition, the biological function of EMP1 in triple-negative breast cancer (TNBC) is largely unclear.
Qi Wang, Dandan Li, Haixiu Ma, Zengyan Li, Juan Wu, Jinwan Qiao, Jun Liu, Jing Zhao, Ronghua Ma, Lin Tian, Lei Zhang, Jianye Yang, Jianing Wang, Shanshan Qin, Zhanhai Su   +14 more
doaj   +1 more source

Agricultural Diversification at the Margin. Strategies and Determinants in Italian Mountain and Remote Areas

Agribusiness, EarlyView.
ABSTRACT This paper explores the convergence in on‐farm diversification strategies of agricultural holdings, between remote areas and more central ones. Using Italian farm‐level data, we explore the determinants of diversification strategies across farms.
Gianluca Grilli, Francesco Pagliacci, Paola Gatto   +2 more
wiley   +1 more source

UHPLC-QTOFMS-Based Metabolomic Analysis of the Hippocampus in Hypoxia Preconditioned Mouse

Frontiers in Physiology, 2019
Background: Hypoxia appears in a number of extreme environments, including high altitudes, the deep sea, and during aviation, and occurs in cancer, cardiovascular disease, respiratory failures and neurological disorders. Though it is well recognized that
Wen-Ting Liao, Jie Liu, Jie Liu, Si-Min Zhou, Si-Min Zhou, Gang Xu, Gang Xu, Yu-Qi Gao, Yu-Qi Gao, Wen-Yuan Liu   +9 more
doaj   +1 more source

System for indicating fuel-efficient aircraft altitude [PDF]

, 1984
A method and apparatus are provided for indicating the altitude at which an aircraft should fly so the W/d ratio (weight of the aircraft divided by the density of air) more closely approaches the optimum W/d for the aircraft.
Gary, B. L.
core   +1 more source