Results 11 to 20 of about 209,383 (273)

Isotope (14C and 13C) analysis of deep peat CO2 using a passive sampling technique [PDF]

open access: yes, 2009
We developed and tested a new method to collect CO<sub>2</sub> from the surface to deep layers of a peatland for radiocarbon analysis. The method comprises two components: i) a probe equipped with a hydrophobic filter that allows entry of ...
Garnett, M.H., Hardie, S.M.L.
core   +1 more source

Cigarette smoking accelerated brain aging and induced pre-Alzheimer-like neuropathology in rats. [PDF]

open access: yesPLoS ONE, 2012
Cigarette smoking has been proposed as a major risk factor for aging-related pathological changes and Alzheimer's disease (AD). To date, little is known for how smoking can predispose our brains to dementia or cognitive impairment.
Yuen-Shan Ho   +7 more
doaj   +1 more source

SIMULATION-BASED ANALYSIS OF 3D FLOW INSIDE A MICROPUMP WITH PASSIVE VALVES [PDF]

open access: yes, 2007
It is expected that chemical, biological and environmental applications of microdevices will increase with new developments in micromachining techniques.
Akcan, Caner   +6 more
core   +2 more sources

Architecture between heteronomy and self-generation

open access: yesTechne, 2021
Introduction «I have never worked in the technocratic exaltation, solving a constructive problem and that’s it. I’ve always tried to interpret the space of human life» (Vittorio Garatti).
Luigi Alini
doaj   +1 more source

Numerical and experimental evaluation of the passive pre-chamber concept for future CNG SI engines

open access: yesApplied Thermal Engineering, 2023
[EN] The third decade of the 21st century is set to be one of the most relevant in terms of the transition of methods and forms of using different energy sources, with short and medium-term developments on the road to decarbonization. One of the most widely accepted measures on this path is the reduction of CO2 emissions from internal combustion ...
R. Payri   +3 more
openaire   +2 more sources

A piezoelectric micropump based on micromachining of silicon [PDF]

open access: yes, 1988
The design and realization of two pumps based on micromachining of silicon are described. The pumps, which are of the reciprocating displacement type, comprise one or two pump chambers, a thin glass pump membrane actuated by a piezoelectric disc and ...
Bouwstra, S.   +2 more
core   +2 more sources

Advantages of hydrogen addition in a passive pre‐chamber ignited SI engine for passenger car applications

open access: yesInternational Journal of Energy Research, 2021
[EN] Hydrogen is one of the most promising alternative fuels for the transportation industry. The use of hydrogen to enable lean burn in internal combustion engines is an attractive solution for reducing CO2 emissions from two points of views: the substitution of carbon-based fuels and the increased thermal efficiency due to lean operation.
J. Benajes   +4 more
openaire   +3 more sources

Predictive value of left atrial strain analysis in adverse clinical events in patients with hypertrophic cardiomyopathy: a CMR study

open access: yesBMC Cardiovascular Disorders, 2023
Background A subset of patients with hypertrophic cardiomyopathy (HCM) will experience adverse clinical events such as heart failure (HF), cardiovascular death, and new-onset atrial fibrillation (AF). Current risk stratification methods are imperfect and
Di Tian   +7 more
doaj   +1 more source

Proof-of-principle demonstration of vertical gravity gradient measurement using a single proof mass double-loop atom interferometer [PDF]

open access: yes, 2018
We demonstrate a proof-of-principle of direct Earth gravity gradient measurement with an atom interferometer-based gravity gradiomter using a single proof mass of cold 87 rubidium atoms.
Bidel, Yannick   +5 more
core   +2 more sources

Right Heart Remodeling in Patients with End-Stage Alcoholic Liver Cirrhosis: Speckle Tracking Point of View [PDF]

open access: yes, 2019
BACKGROUND: Data regarding cardiac remodeling in patients with alcoholic liver cirrhosis are scarce. We sought to investigate right atrial (RA) and right ventricular (RV) structure, function, and mechanics in patients with alcoholic liver cirrhosis.
Braun, Alexander   +8 more
core   +1 more source

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