Results 41 to 50 of about 279,349 (317)

Altitude illness

BMJ, 2003
Summary points: Altitude related illness is rare at altitudes below 2500 metres but is common in travellers to 3500 metres or more. The occurrence is increased by a rapid gain in altitude and reduced by a slow ascent, allowing time for acclimatisation. For most travellers, altitude related illness is an unpleasant but self limiting and benign syndrome,
Barry, P, Pollard, A
openaire   +4 more sources

Self‐Assembled Monolayers in p–i–n Perovskite Solar Cells: Molecular Design, Interfacial Engineering, and Machine Learning–Accelerated Material Discovery

Advanced Materials, EarlyView.
This review highlights the role of self‐assembled monolayers (SAMs) in perovskite solar cells, covering molecular engineering, multifunctional interface regulation, machine learning (ML) accelerated discovery, advanced device architectures, and pathways toward scalable fabrication and commercialization for high‐efficiency and stable single‐junction and
Asmat Ullah, Ying Luo, Stefaan De Wolf
wiley   +1 more source

Comparison of Simulated High Altitude Pilot Effective Performance Time Between Habitual Smokers and Non-Smokers

, 2003
Smoking attenuates the amount of oxygen that diffuses from the lung tissue and oxygenates the blood (Guyton, 1996). High altitudes attenuate the oxygen available for transport to the blood.
James F. Fletcher, Fletcher, James F.
core   +1 more source

Altitude-Induced Sleep Apnea Is Highly Dependent on Ethnic Background (Sherpa Vs. Tamang).

, 2022
Heiniger, Grégory, Simon Walbaum, Claudio Sartori, Alban Lovis, Marco Sazzini, Andrew Wellman, and Raphael Heinzer. Altitude-Induced Sleep Apnea Is Highly Dependent on Ethnic Background (Sherpa Vs. Tamang). High Alt Med Biol. 23:165-172, 2022. Rationale:
Heiniger, G., Sartori, C., Lovis, A., Wellman, A., Walbaum, S., Sazzini, M., Heinzer, R.   +6 more
core   +1 more source

Memory impairment induced by exposure to simulated hypobaric hypoxia and phosphoproteomic analysis of hippocampus in mice

Di-san junyi daxue xuebao, 2022
Objective To observe the changes of protein phosphorylation levels in the hippocampus of mice with memory impairment caused by hypobaric hypoxia exposure, and to explore the key phosphorylated proteins and associated pathways involved in memory deficits.
DONG Huaping, ZHONG Zhifeng, LI Peng, HUANG Pei, TIAN Huaijun, XIE Jiaxin, ZHOU Simin   +6 more
doaj   +1 more source

Rational Tuning of Hygroscopic Oscillation of Stacked Nanoflake Assemblies for Continuous Ambient Energy Harvesting

Advanced Materials, EarlyView.
Stacked nanoflake assembly (SNA) membranes can oscillate autonomously, offering opportunities for soft actuation and energy harvesting. This work uncovers the physical mechanism behind the sustained oscillation of SNA membranes in gradient humidity and identifies three governing dimensionless parameters, enabling rational design for optimizing SNA ...
Zijing Zhang, Jimin Fu, Gesa Zhang, Zhihua Liang, Boxun Zhang, Haimin Yao   +5 more
wiley   +1 more source

Urbanization and altitude are associated with low kidney function in Peru [PDF]

, 2019
Background: Kidney health needs to be studied in low- and middle-income countries with populations living at high altitude and undergoing urbanization. We studied whether greater level of urbanization was associated with worse kidney function; and higher
Narvaez-Guerra, Offdan, Smeeth, Liam, Carrillo Larco, Rodrigo, Miranda, J Jaime, Bernabe-Ortiz, Antonio, CRONICAS Cohort Study Group, Herrera-Enriquez, Karela, Checkley, William, Gilman, Robert H, Carrillo-Larco, Rodrigo M, Medina-Lezama, Josefina   +10 more
core   +1 more source

5-Hydroxytryptamine receptor 1D overexpression exacerbates gastric cancer proliferation, invasion, and angiogenesis by activating the Wnt/β-catenin signaling

BMC Cancer
Dysregulation of 5-Hydroxytryptamine and its receptors play important roles in the development and progression of malignant tumors. However, the biological role and underlying molecular mechanism of 5-Hydroxytryptamine Receptor 1D (HTR1D) gastric cancer (
Juan Wu, Yi Yi, Qi Wang, Jinwan Qiao, Haixiu Ma, Jing Zhao, Ronghua Ma, Jun Liu, Haiyan Wang, Zhanhai Su   +9 more
doaj   +1 more source

Benchmarking Coaxial and Angular Optical Emission Spectroscopy With Recommendations for Reliable Compositional In Situ Monitoring During Laser Powder Bed Fusion

Advanced Materials Technologies, EarlyView.
ABSTRACT Real‐time insight into local chemistry is critical for reliable part quality in additive manufacturing, especially laser powder bed fusion (PBF‑LB/M), where rapid thermal cycles and localized evaporation can undermine part performance. Optical emission spectroscopy (OES) offers non‑intrusive, in situ plume monitoring, but detection geometry ...
Philipp Gabriel, Bastian Jülich, Anna Rosa Ziefuss, Florian Eibl, Stephan Barcikowski   +4 more
wiley   +1 more source

Integrated Metabolomic and Transcriptomic Analysis of Phenylpropanoid Biosynthesis in Silphium perfoliatum

Current Issues in Molecular Biology
Silphium perfoliatum is a promising economic plant rich in bioactive secondary metabolites, yet the molecular regulation of phenylpropanoid biosynthesis across development remains unclear.
Guoying Zhang, Dejun Zhang
doaj   +1 more source