Results 71 to 80 of about 6,096,891 (335)
Hubble Space Telescope Survey of Interstellar ^12CO/^13CO in the Solar Neighborhood
, 2007 We examine 20 diffuse and translucent Galactic sight lines and extract the column densities of the ^12CO and ^13CO isotopologues from their ultraviolet A--X absorption bands detected in archival Space Telescope Imaging Spectrograph data with lambda ...
Boogert A. C. A. +16 more
core +1 more source
Lung Structure and the Intrinsic Challenges of Gas Exchange.
Comprehensive Physiology, 2016 Structural and functional complexities of the mammalian lung evolved to meet a unique set of challenges, namely, the provision of efficient delivery of inspired air to all lung units within a confined thoracic space, to build a large gas exchange surface
C. Hsia, D. Hyde, E. Weibel
semanticscholar +1 more source
Advanced Engineering Materials, EarlyView.Herein, environmental scanning electron microscopy (ESEM) is discussed as a powerful extension of conventional SEM for life sciences. By combining high‐resolution imaging with variable pressure and humidity, ESEM allows the analysis of untreated biological materials, supports in situ monitoring of hydration‐driven changes, and advances the functional ...
Jendrian Riedel +6 more
wiley +1 more source
Acta Agrobotanica, 2012 A research experiment was conducted in which rates of photosynthesis and transpiration were measured in leaves and ears of two winter wheat varieties grown under fungicide control conditions and without fungicide control.
Joanna K. Jarmołkowicz, Jacek Olszewski
doaj +1 more source
Energies, 2020 This study examines whether oil and gas risk factors are priced in the returns of Malaysian oil and gas stocks employing asset pricing model with improved version of Fama-MacBeth two-stage panel regression.
Mohmmad Enamul Hoque +2 more
doaj +1 more source
Analysis of the second order exchange self energy of a dense electron gas
, 2006 We investigate the evaluation of the six-fold integral representation for the second order exchange contribution to the self energy of a three dimensional electron gas at the Fermi surface.Comment: 6 ...
George Lamb +7 more
core +2 more sources
Optimal allocation of leaf epidermal area for gas exchange
New Phytologist, 2016 Summary A long‐standing research focus in phytology has been to understand how plants allocate leaf epidermal space to stomata in order to achieve an economic balance between the plant's carbon needs and water use.
H. D. de Boer +5 more
semanticscholar +1 more source
Rheocasting versus Die Casting: An Insight into the Low‐Cycle Fatigue Behavior of AlSi7Mg0.6
Advanced Engineering Materials, EarlyView.The study compares rheocast lightweight components with high‐pressure die cast materials regarding microstructure and fatigue behavior. Rheocast process offers higher efficiency due to lower casting temperatures. Despite some microstructural differences, both processes show similar strengths (yield strength 125 MPa, tensile strength 240 MPa).
Julia Richter +4 more
wiley +1 more source
Pulmonary Medicine, 2012 Patients with pulmonary arterial hypertension (PAH) and heart failure (HF) display many abnormalities in respiratory gas exchange. These abnormalities are accentuated with exercise and track with disease severity.
Chul-Ho Kim +3 more
doaj +1 more source
, 2017 . Simultaneous air–sea fluxes and concentration differences of dimethylsulfide (DMS) and carbon dioxide (CO2) were measured during a summertime North Atlantic cruise in 2011.
T. Bell +8 more
semanticscholar +1 more source